1edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson/* pcm.c 2edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** 3edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** Copyright 2011, The Android Open Source Project 4edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** 5edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** Redistribution and use in source and binary forms, with or without 6edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** modification, are permitted provided that the following conditions are met: 7edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** * Redistributions of source code must retain the above copyright 8edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** notice, this list of conditions and the following disclaimer. 9edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** * Redistributions in binary form must reproduce the above copyright 10edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** notice, this list of conditions and the following disclaimer in the 11edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** documentation and/or other materials provided with the distribution. 12edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** * Neither the name of The Android Open Source Project nor the names of 13edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** its contributors may be used to endorse or promote products derived 14edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** from this software without specific prior written permission. 15edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** 16edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** THIS SOFTWARE IS PROVIDED BY The Android Open Source Project ``AS IS'' AND 17edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** ARE DISCLAIMED. IN NO EVENT SHALL The Android Open Source Project BE LIABLE 20edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 23edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 26edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson** DAMAGE. 27edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson*/ 28edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 29edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <stdio.h> 30edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <stdlib.h> 31edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <fcntl.h> 32edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <stdarg.h> 33edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <string.h> 34edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <errno.h> 35edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <unistd.h> 36e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson#include <poll.h> 37edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 38edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <sys/ioctl.h> 39edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <sys/mman.h> 40edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <sys/time.h> 41e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson#include <limits.h> 42edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 43edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <linux/ioctl.h> 44edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#define __force 45edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#define __bitwise 46edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#define __user 47edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <sound/asound.h> 48edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 49edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#include <tinyalsa/asoundlib.h> 50edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 51edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#define PARAM_MAX SNDRV_PCM_HW_PARAM_LAST_INTERVAL 52e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson#define SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP (1<<2) 53edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 5470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung/* Logs information into a string; follows snprintf() in that 5570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung * offset may be greater than size, and though no characters are copied 5670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung * into string, characters are still counted into offset. */ 5770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung#define STRLOG(string, offset, size, ...) \ 5870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung do { int temp, clipoffset = offset > size ? size : offset; \ 5970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung temp = snprintf(string + clipoffset, size - clipoffset, __VA_ARGS__); \ 6070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung if (temp > 0) offset += temp; } while (0) 6170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 6270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung#ifndef ARRAY_SIZE 6370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) 6470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung#endif 6570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 6670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung/* refer to SNDRV_PCM_ACCESS_##index in sound/asound.h. */ 6770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hungstatic const char * const access_lookup[] = { 6870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "MMAP_INTERLEAVED", 6970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "MMAP_NONINTERLEAVED", 7070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "MMAP_COMPLEX", 7170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "RW_INTERLEAVED", 7270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "RW_NONINTERLEAVED", 7370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung}; 7470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 7570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung/* refer to SNDRV_PCM_FORMAT_##index in sound/asound.h. */ 7670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hungstatic const char * const format_lookup[] = { 7770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung /*[0] =*/ "S8", 7870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U8", 7970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S16_LE", 8070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S16_BE", 8170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U16_LE", 8270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U16_BE", 8370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S24_LE", 8470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S24_BE", 8570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U24_LE", 8670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U24_BE", 8770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S32_LE", 8870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S32_BE", 8970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U32_LE", 9070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U32_BE", 9170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "FLOAT_LE", 9270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "FLOAT_BE", 9370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "FLOAT64_LE", 9470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "FLOAT64_BE", 9570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "IEC958_SUBFRAME_LE", 9670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "IEC958_SUBFRAME_BE", 9770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "MU_LAW", 9870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "A_LAW", 9970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "IMA_ADPCM", 10070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "MPEG", 10170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung /*[24] =*/ "GSM", 10270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung /* gap */ 10370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung [31] = "SPECIAL", 10470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S24_3LE", 10570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S24_3BE", 10670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U24_3LE", 10770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U24_3BE", 10870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S20_3LE", 10970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S20_3BE", 11070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U20_3LE", 11170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U20_3BE", 11270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S18_3LE", 11370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "S18_3BE", 11470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "U18_3LE", 11570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung /*[43] =*/ "U18_3BE", 11670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung#if 0 11770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung /* recent additions, may not be present on local asound.h */ 11870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "G723_24", 11970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "G723_24_1B", 12070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "G723_40", 12170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "G723_40_1B", 12270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "DSD_U8", 12370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "DSD_U16_LE", 12470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung#endif 12570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung}; 12670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 12770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung/* refer to SNDRV_PCM_SUBFORMAT_##index in sound/asound.h. */ 12870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hungstatic const char * const subformat_lookup[] = { 12970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "STD", 13070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung}; 13170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 132edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstatic inline int param_is_mask(int p) 133edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 134edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return (p >= SNDRV_PCM_HW_PARAM_FIRST_MASK) && 135edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson (p <= SNDRV_PCM_HW_PARAM_LAST_MASK); 136edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 137edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 138edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstatic inline int param_is_interval(int p) 139edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 140edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return (p >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL) && 141edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson (p <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL); 142edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 143edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 144edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstatic inline struct snd_interval *param_to_interval(struct snd_pcm_hw_params *p, int n) 145edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 146edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return &(p->intervals[n - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]); 147edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 148edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 149edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstatic inline struct snd_mask *param_to_mask(struct snd_pcm_hw_params *p, int n) 150edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 151edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return &(p->masks[n - SNDRV_PCM_HW_PARAM_FIRST_MASK]); 152edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 153edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 154edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstatic void param_set_mask(struct snd_pcm_hw_params *p, int n, unsigned int bit) 155edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 156edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (bit >= SNDRV_MASK_MAX) 157edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return; 158edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (param_is_mask(n)) { 159edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct snd_mask *m = param_to_mask(p, n); 160edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson m->bits[0] = 0; 161edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson m->bits[1] = 0; 162edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson m->bits[bit >> 5] |= (1 << (bit & 31)); 163edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 164edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 165edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 166edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstatic void param_set_min(struct snd_pcm_hw_params *p, int n, unsigned int val) 167edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 168edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (param_is_interval(n)) { 169edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct snd_interval *i = param_to_interval(p, n); 170edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson i->min = val; 171edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 172edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 173edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 17442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilsonstatic unsigned int param_get_min(struct snd_pcm_hw_params *p, int n) 17542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson{ 17642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson if (param_is_interval(n)) { 17742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson struct snd_interval *i = param_to_interval(p, n); 17842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return i->min; 17942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson } 18042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return 0; 18142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson} 18242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 183b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLeanstatic void param_set_max(struct snd_pcm_hw_params *p, int n, unsigned int val) 184b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean{ 185b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean if (param_is_interval(n)) { 186b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean struct snd_interval *i = param_to_interval(p, n); 187b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean i->max = val; 188b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean } 189b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean} 190b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean 19142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilsonstatic unsigned int param_get_max(struct snd_pcm_hw_params *p, int n) 19242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson{ 19342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson if (param_is_interval(n)) { 19442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson struct snd_interval *i = param_to_interval(p, n); 19542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return i->max; 19642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson } 19742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return 0; 19842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson} 19942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 200edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstatic void param_set_int(struct snd_pcm_hw_params *p, int n, unsigned int val) 201edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 202edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (param_is_interval(n)) { 203edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct snd_interval *i = param_to_interval(p, n); 204edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson i->min = val; 205edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson i->max = val; 206edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson i->integer = 1; 207edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 208edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 209edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 210e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonstatic unsigned int param_get_int(struct snd_pcm_hw_params *p, int n) 211e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 212e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (param_is_interval(n)) { 213e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson struct snd_interval *i = param_to_interval(p, n); 214e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (i->integer) 215e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return i->max; 216e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 217e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return 0; 218e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 219e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 220edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstatic void param_init(struct snd_pcm_hw_params *p) 221edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 222edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson int n; 223edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 224edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson memset(p, 0, sizeof(*p)); 225edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson for (n = SNDRV_PCM_HW_PARAM_FIRST_MASK; 226edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson n <= SNDRV_PCM_HW_PARAM_LAST_MASK; n++) { 227edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct snd_mask *m = param_to_mask(p, n); 228edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson m->bits[0] = ~0; 229edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson m->bits[1] = ~0; 230edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 231edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson for (n = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; 232edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson n <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; n++) { 233edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct snd_interval *i = param_to_interval(p, n); 234edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson i->min = 0; 235edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson i->max = ~0; 236edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 23742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson p->rmask = ~0U; 23842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson p->cmask = 0; 23942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson p->info = ~0U; 240edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 241edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 242edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson#define PCM_ERROR_MAX 128 243edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 244edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstruct pcm { 245edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson int fd; 246edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson unsigned int flags; 247edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson int running:1; 2487a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah int prepared:1; 249edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson int underruns; 250edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson unsigned int buffer_size; 251e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson unsigned int boundary; 252edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson char error[PCM_ERROR_MAX]; 253edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct pcm_config config; 254dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson struct snd_pcm_mmap_status *mmap_status; 255dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson struct snd_pcm_mmap_control *mmap_control; 256dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson struct snd_pcm_sync_ptr *sync_ptr; 257e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson void *mmap_buffer; 258e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson unsigned int noirq_frames_per_msec; 25973b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent int wait_for_avail_min; 260edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson}; 261edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 262edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonunsigned int pcm_get_buffer_size(struct pcm *pcm) 263edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 264edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return pcm->buffer_size; 265edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 266edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 267edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonconst char* pcm_get_error(struct pcm *pcm) 268edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 269edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return pcm->error; 270edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 271edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 272edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstatic int oops(struct pcm *pcm, int e, const char *fmt, ...) 273edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 274edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson va_list ap; 275edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson int sz; 276edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 277edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson va_start(ap, fmt); 278edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson vsnprintf(pcm->error, PCM_ERROR_MAX, fmt, ap); 279edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson va_end(ap); 280edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson sz = strlen(pcm->error); 281edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 282edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (errno) 283edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson snprintf(pcm->error + sz, PCM_ERROR_MAX - sz, 284edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson ": %s", strerror(e)); 285edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return -1; 286edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 287edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 28883b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilsonstatic unsigned int pcm_format_to_alsa(enum pcm_format format) 28983b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson{ 29083b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson switch (format) { 29183b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson case PCM_FORMAT_S32_LE: 29283b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson return SNDRV_PCM_FORMAT_S32_LE; 293da39e0b09eb0a1b559a96e2108160d1d8dccf314Simon Wilson case PCM_FORMAT_S8: 294da39e0b09eb0a1b559a96e2108160d1d8dccf314Simon Wilson return SNDRV_PCM_FORMAT_S8; 295d9837d0234c2b99267738607d7ca6100ba83bcc6Glenn Kasten case PCM_FORMAT_S24_3LE: 296d9837d0234c2b99267738607d7ca6100ba83bcc6Glenn Kasten return SNDRV_PCM_FORMAT_S24_3LE; 297da39e0b09eb0a1b559a96e2108160d1d8dccf314Simon Wilson case PCM_FORMAT_S24_LE: 298da39e0b09eb0a1b559a96e2108160d1d8dccf314Simon Wilson return SNDRV_PCM_FORMAT_S24_LE; 29983b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson default: 30083b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson case PCM_FORMAT_S16_LE: 30183b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson return SNDRV_PCM_FORMAT_S16_LE; 30283b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson }; 30383b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson} 30483b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson 30536ea2d824e5d8af550c139da9da20e73f82a9ae1Simon Wilsonunsigned int pcm_format_to_bits(enum pcm_format format) 30683b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson{ 30783b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson switch (format) { 30883b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson case PCM_FORMAT_S32_LE: 30936ea2d824e5d8af550c139da9da20e73f82a9ae1Simon Wilson case PCM_FORMAT_S24_LE: 31083b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson return 32; 311d9837d0234c2b99267738607d7ca6100ba83bcc6Glenn Kasten case PCM_FORMAT_S24_3LE: 312d9837d0234c2b99267738607d7ca6100ba83bcc6Glenn Kasten return 24; 31383b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson default: 31483b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson case PCM_FORMAT_S16_LE: 31583b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson return 16; 31683b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson }; 31783b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson} 31883b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson 319e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonunsigned int pcm_bytes_to_frames(struct pcm *pcm, unsigned int bytes) 320e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 321e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return bytes / (pcm->config.channels * 322e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson (pcm_format_to_bits(pcm->config.format) >> 3)); 323e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 324e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 325e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonunsigned int pcm_frames_to_bytes(struct pcm *pcm, unsigned int frames) 326e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 327e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return frames * pcm->config.channels * 328e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson (pcm_format_to_bits(pcm->config.format) >> 3); 329e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 330e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 331dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilsonstatic int pcm_sync_ptr(struct pcm *pcm, int flags) { 332dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (pcm->sync_ptr) { 333dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->sync_ptr->flags = flags; 334dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_SYNC_PTR, pcm->sync_ptr) < 0) 335dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson return -1; 336dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson } 337dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson return 0; 338dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson} 339dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 340dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilsonstatic int pcm_hw_mmap_status(struct pcm *pcm) { 341dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 342dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (pcm->sync_ptr) 343dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson return 0; 344dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 345dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson int page_size = sysconf(_SC_PAGE_SIZE); 346dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->mmap_status = mmap(NULL, page_size, PROT_READ, MAP_FILE | MAP_SHARED, 347dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->fd, SNDRV_PCM_MMAP_OFFSET_STATUS); 348dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (pcm->mmap_status == MAP_FAILED) 349dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->mmap_status = NULL; 350dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (!pcm->mmap_status) 351dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson goto mmap_error; 352dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 353dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->mmap_control = mmap(NULL, page_size, PROT_READ | PROT_WRITE, 354dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson MAP_FILE | MAP_SHARED, pcm->fd, SNDRV_PCM_MMAP_OFFSET_CONTROL); 355dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (pcm->mmap_control == MAP_FAILED) 356dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->mmap_control = NULL; 357dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (!pcm->mmap_control) { 358dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson munmap(pcm->mmap_status, page_size); 359dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->mmap_status = NULL; 360dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson goto mmap_error; 361dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson } 36273b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent if (pcm->flags & PCM_MMAP) 36373b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->mmap_control->avail_min = pcm->config.avail_min; 36473b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent else 36573b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->mmap_control->avail_min = 1; 366dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 367dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson return 0; 368dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 369dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilsonmmap_error: 370dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 371dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->sync_ptr = calloc(1, sizeof(*pcm->sync_ptr)); 372dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (!pcm->sync_ptr) 373dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson return -ENOMEM; 374dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->mmap_status = &pcm->sync_ptr->s.status; 375dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->mmap_control = &pcm->sync_ptr->c.control; 37673b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent if (pcm->flags & PCM_MMAP) 37773b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->mmap_control->avail_min = pcm->config.avail_min; 37873b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent else 37973b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->mmap_control->avail_min = 1; 38073b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent 381dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm_sync_ptr(pcm, 0); 382dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 383dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson return 0; 384dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson} 385dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 386dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilsonstatic void pcm_hw_munmap_status(struct pcm *pcm) { 387dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (pcm->sync_ptr) { 388dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson free(pcm->sync_ptr); 389dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->sync_ptr = NULL; 390dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson } else { 391dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson int page_size = sysconf(_SC_PAGE_SIZE); 392dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (pcm->mmap_status) 393dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson munmap(pcm->mmap_status, page_size); 394dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (pcm->mmap_control) 395dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson munmap(pcm->mmap_control, page_size); 396dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson } 397dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->mmap_status = NULL; 398dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm->mmap_control = NULL; 399dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson} 400dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 401e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonstatic int pcm_areas_copy(struct pcm *pcm, unsigned int pcm_offset, 402c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent char *buf, unsigned int src_offset, 403e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson unsigned int frames) 404e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 405e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson int size_bytes = pcm_frames_to_bytes(pcm, frames); 406e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson int pcm_offset_bytes = pcm_frames_to_bytes(pcm, pcm_offset); 407e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson int src_offset_bytes = pcm_frames_to_bytes(pcm, src_offset); 408e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 409e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* interleaved only atm */ 410c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent if (pcm->flags & PCM_IN) 411c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent memcpy(buf + src_offset_bytes, 412c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent (char*)pcm->mmap_buffer + pcm_offset_bytes, 413c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent size_bytes); 414c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent else 415c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent memcpy((char*)pcm->mmap_buffer + pcm_offset_bytes, 416c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent buf + src_offset_bytes, 417c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent size_bytes); 418e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return 0; 419e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 420e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 421c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurentstatic int pcm_mmap_transfer_areas(struct pcm *pcm, char *buf, 422e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson unsigned int offset, unsigned int size) 423e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 424e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson void *pcm_areas; 425e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson int commit; 426e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson unsigned int pcm_offset, frames, count = 0; 427e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 428e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson while (size > 0) { 429e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson frames = size; 430e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm_mmap_begin(pcm, &pcm_areas, &pcm_offset, &frames); 431c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent pcm_areas_copy(pcm, pcm_offset, buf, offset, frames); 432e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson commit = pcm_mmap_commit(pcm, pcm_offset, frames); 433e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (commit < 0) { 434e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson oops(pcm, commit, "failed to commit %d frames\n", frames); 435e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return commit; 436e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 437e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 438e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson offset += commit; 439e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson count += commit; 440e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson size -= commit; 441e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 442e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return count; 443e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 444e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 445dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilsonint pcm_get_htimestamp(struct pcm *pcm, unsigned int *avail, 446dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson struct timespec *tstamp) 447dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson{ 448dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson int frames; 449dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson int rc; 450dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson snd_pcm_uframes_t hw_ptr; 451dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 452dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (!pcm_is_ready(pcm)) 453dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson return -1; 454dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 455dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson rc = pcm_sync_ptr(pcm, SNDRV_PCM_SYNC_PTR_APPL|SNDRV_PCM_SYNC_PTR_HWSYNC); 456dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (rc < 0) 457dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson return -1; 458dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 4598dd366f47258eeda07910a99b29ba681fe7464a7Simon Wilson if ((pcm->mmap_status->state != PCM_STATE_RUNNING) && 4608dd366f47258eeda07910a99b29ba681fe7464a7Simon Wilson (pcm->mmap_status->state != PCM_STATE_DRAINING)) 4615aed71db7d87ba518b53e40c00dcaa0afbc2acebSimon Wilson return -1; 4625aed71db7d87ba518b53e40c00dcaa0afbc2acebSimon Wilson 463dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson *tstamp = pcm->mmap_status->tstamp; 464dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (tstamp->tv_sec == 0 && tstamp->tv_nsec == 0) 465dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson return -1; 466dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 467dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson hw_ptr = pcm->mmap_status->hw_ptr; 468dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (pcm->flags & PCM_IN) 469dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson frames = hw_ptr - pcm->mmap_control->appl_ptr; 470dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson else 471dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson frames = hw_ptr + pcm->buffer_size - pcm->mmap_control->appl_ptr; 472dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 473dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (frames < 0) 47473b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent frames += pcm->boundary; 47573b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent else if (frames > (int)pcm->boundary) 47673b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent frames -= pcm->boundary; 477dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 478dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson *avail = (unsigned int)frames; 479dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 480dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson return 0; 481dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson} 482dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 483daa83291944318d8face12c780dfb69ae96b0723Simon Wilsonint pcm_write(struct pcm *pcm, const void *data, unsigned int count) 484edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 485edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct snd_xferi x; 486edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 487edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (pcm->flags & PCM_IN) 488edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return -EINVAL; 489edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 490daa83291944318d8face12c780dfb69ae96b0723Simon Wilson x.buf = (void*)data; 49183b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson x.frames = count / (pcm->config.channels * 49283b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson pcm_format_to_bits(pcm->config.format) / 8); 493edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 494edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson for (;;) { 495edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (!pcm->running) { 4967a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah int prepare_error = pcm_prepare(pcm); 4977a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah if (prepare_error) 4987a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah return prepare_error; 499edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_WRITEI_FRAMES, &x)) 500edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return oops(pcm, errno, "cannot write initial data"); 501edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->running = 1; 502edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return 0; 503edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 504edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_WRITEI_FRAMES, &x)) { 5057a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah pcm->prepared = 0; 506edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->running = 0; 507edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (errno == EPIPE) { 508673253acf06838bb24d0b0b1a3962bed573855b8John Grossman /* we failed to make our window -- try to restart if we are 509673253acf06838bb24d0b0b1a3962bed573855b8John Grossman * allowed to do so. Otherwise, simply allow the EPIPE error to 510673253acf06838bb24d0b0b1a3962bed573855b8John Grossman * propagate up to the app level */ 511edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->underruns++; 512673253acf06838bb24d0b0b1a3962bed573855b8John Grossman if (pcm->flags & PCM_NORESTART) 513673253acf06838bb24d0b0b1a3962bed573855b8John Grossman return -EPIPE; 514edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson continue; 515edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 516edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return oops(pcm, errno, "cannot write stream data"); 517edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 518edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return 0; 519edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 520edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 521edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 522edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonint pcm_read(struct pcm *pcm, void *data, unsigned int count) 523edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 524edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct snd_xferi x; 525edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 526edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (!(pcm->flags & PCM_IN)) 527edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return -EINVAL; 528edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 529edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson x.buf = data; 53083b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson x.frames = count / (pcm->config.channels * 53183b1d6de55ec69cde7a935d6ada0011669d88ed6Simon Wilson pcm_format_to_bits(pcm->config.format) / 8); 532edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 533edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson for (;;) { 534edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (!pcm->running) { 53585dc38f5bee79c184260e8c665cc34143be12bd4Simon Wilson if (pcm_start(pcm) < 0) { 53685dc38f5bee79c184260e8c665cc34143be12bd4Simon Wilson fprintf(stderr, "start error"); 53785dc38f5bee79c184260e8c665cc34143be12bd4Simon Wilson return -errno; 53885dc38f5bee79c184260e8c665cc34143be12bd4Simon Wilson } 539edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 540edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_READI_FRAMES, &x)) { 5417a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah pcm->prepared = 0; 542edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->running = 0; 543edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (errno == EPIPE) { 544edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson /* we failed to make our window -- try to restart */ 545edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->underruns++; 546edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson continue; 547edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 548edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return oops(pcm, errno, "cannot read stream data"); 549edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 550edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return 0; 551edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 552edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 553edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 554edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstatic struct pcm bad_pcm = { 555edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson .fd = -1, 556edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson}; 557edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 55842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilsonstruct pcm_params *pcm_params_get(unsigned int card, unsigned int device, 55942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson unsigned int flags) 56042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson{ 56142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson struct snd_pcm_hw_params *params; 56242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson char fn[256]; 56342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson int fd; 56442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 56542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson snprintf(fn, sizeof(fn), "/dev/snd/pcmC%uD%u%c", card, device, 56642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson flags & PCM_IN ? 'c' : 'p'); 56742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 56842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson fd = open(fn, O_RDWR); 56942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson if (fd < 0) { 57042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson fprintf(stderr, "cannot open device '%s'\n", fn); 57142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson goto err_open; 57242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson } 57342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 57442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson params = calloc(1, sizeof(struct snd_pcm_hw_params)); 57542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson if (!params) 57642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson goto err_calloc; 57742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 57842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson param_init(params); 57942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson if (ioctl(fd, SNDRV_PCM_IOCTL_HW_REFINE, params)) { 58042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson fprintf(stderr, "SNDRV_PCM_IOCTL_HW_REFINE error (%d)\n", errno); 58142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson goto err_hw_refine; 58242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson } 58342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 58442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson close(fd); 58542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 58642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return (struct pcm_params *)params; 58742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 58842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilsonerr_hw_refine: 58942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson free(params); 59042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilsonerr_calloc: 59142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson close(fd); 59242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilsonerr_open: 59342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return NULL; 59442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson} 59542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 59642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilsonvoid pcm_params_free(struct pcm_params *pcm_params) 59742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson{ 59842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson struct snd_pcm_hw_params *params = (struct snd_pcm_hw_params *)pcm_params; 59942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 60042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson if (params) 60142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson free(params); 60242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson} 60342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 60442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilsonstatic int pcm_param_to_alsa(enum pcm_param param) 60542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson{ 60642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson switch (param) { 607a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung case PCM_PARAM_ACCESS: 608a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung return SNDRV_PCM_HW_PARAM_ACCESS; 609a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung case PCM_PARAM_FORMAT: 610a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung return SNDRV_PCM_HW_PARAM_FORMAT; 611a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung case PCM_PARAM_SUBFORMAT: 612a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung return SNDRV_PCM_HW_PARAM_SUBFORMAT; 61342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_SAMPLE_BITS: 61442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_SAMPLE_BITS; 61542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 61642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_FRAME_BITS: 61742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_FRAME_BITS; 61842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 61942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_CHANNELS: 62042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_CHANNELS; 62142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 62242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_RATE: 62342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_RATE; 62442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 62542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_PERIOD_TIME: 62642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_PERIOD_TIME; 62742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 62842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_PERIOD_SIZE: 62942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_PERIOD_SIZE; 63042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 63142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_PERIOD_BYTES: 63242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_PERIOD_BYTES; 63342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 63442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_PERIODS: 63542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_PERIODS; 63642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 63742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_BUFFER_TIME: 63842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_BUFFER_TIME; 63942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 64042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_BUFFER_SIZE: 64142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_BUFFER_SIZE; 64242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 64342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_BUFFER_BYTES: 64442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_BUFFER_BYTES; 64542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 64642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson case PCM_PARAM_TICK_TIME: 64742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return SNDRV_PCM_HW_PARAM_TICK_TIME; 64842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson break; 64942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 65042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson default: 65142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return -1; 65242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson } 65342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson} 65442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 655a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hungstruct pcm_mask *pcm_params_get_mask(struct pcm_params *pcm_params, 656a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung enum pcm_param param) 657a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung{ 658a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung int p; 659a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung struct snd_pcm_hw_params *params = (struct snd_pcm_hw_params *)pcm_params; 660a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung if (params == NULL) { 661a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung return NULL; 662a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung } 663a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung 664a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung p = pcm_param_to_alsa(param); 665a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung if (p < 0 || !param_is_mask(p)) { 666a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung return NULL; 667a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung } 668a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung 669a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung return (struct pcm_mask *)param_to_mask(params, p); 670a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung} 671a5b44d9bba0c5df52b37850bb929eb53817fb4a4Andy Hung 67242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilsonunsigned int pcm_params_get_min(struct pcm_params *pcm_params, 67342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson enum pcm_param param) 67442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson{ 67542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson struct snd_pcm_hw_params *params = (struct snd_pcm_hw_params *)pcm_params; 67642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson int p; 67742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 67842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson if (!params) 67942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return 0; 68042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 68142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson p = pcm_param_to_alsa(param); 68242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson if (p < 0) 68342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return 0; 68442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 68542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return param_get_min(params, p); 68642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson} 68742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 688b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLeanvoid pcm_params_set_min(struct pcm_params *pcm_params, 689b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean enum pcm_param param, unsigned int val) 690b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean{ 691b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean struct snd_pcm_hw_params *params = (struct snd_pcm_hw_params *)pcm_params; 692b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean int p; 693b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean 694b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean if (!params) 695b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean return; 696b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean 697b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean p = pcm_param_to_alsa(param); 698b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean if (p < 0) 699b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean return; 700b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean 701b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean param_set_min(params, p, val); 702b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean} 703b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean 70442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilsonunsigned int pcm_params_get_max(struct pcm_params *pcm_params, 70542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson enum pcm_param param) 70642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson{ 70742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson struct snd_pcm_hw_params *params = (struct snd_pcm_hw_params *)pcm_params; 70842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson int p; 70942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 71042fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson if (!params) 71142fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return 0; 71242fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 71342fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson p = pcm_param_to_alsa(param); 71442fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson if (p < 0) 71542fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return 0; 71642fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 71742fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson return param_get_max(params, p); 71842fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson} 71942fc2d393c868d5db609e39551d64f1e60fefa0eSimon Wilson 720b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLeanvoid pcm_params_set_max(struct pcm_params *pcm_params, 721b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean enum pcm_param param, unsigned int val) 722b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean{ 723b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean struct snd_pcm_hw_params *params = (struct snd_pcm_hw_params *)pcm_params; 724b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean int p; 725b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean 726b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean if (!params) 727b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean return; 728b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean 729b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean p = pcm_param_to_alsa(param); 730b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean if (p < 0) 731b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean return; 732b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean 733b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean param_set_max(params, p, val); 734b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean} 735b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean 73670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hungstatic int pcm_mask_test(struct pcm_mask *m, unsigned int index) 73770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung{ 73870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung const unsigned int bitshift = 5; /* for 32 bit integer */ 73970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung const unsigned int bitmask = (1 << bitshift) - 1; 74070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung unsigned int element; 74170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 74270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung element = index >> bitshift; 74370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung if (element >= ARRAY_SIZE(m->bits)) 74470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung return 0; /* for safety, but should never occur */ 74570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung return (m->bits[element] >> (index & bitmask)) & 1; 74670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung} 74770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 74870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hungstatic int pcm_mask_to_string(struct pcm_mask *m, char *string, unsigned int size, 74970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung char *mask_name, 75070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung const char * const *bit_array_name, size_t bit_array_size) 75170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung{ 75270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung unsigned int i; 75370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung unsigned int offset = 0; 75470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 75570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung if (m == NULL) 75670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung return 0; 75770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung if (bit_array_size < 32) { 75870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung STRLOG(string, offset, size, "%12s:\t%#08x\n", mask_name, m->bits[0]); 75970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung } else { /* spans two or more bitfields, print with an array index */ 76070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung for (i = 0; i < (bit_array_size + 31) >> 5; ++i) { 76170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung STRLOG(string, offset, size, "%9s[%d]:\t%#08x\n", 76270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung mask_name, i, m->bits[i]); 76370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung } 76470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung } 76570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung for (i = 0; i < bit_array_size; ++i) { 76670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung if (pcm_mask_test(m, i)) { 76770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung STRLOG(string, offset, size, "%12s \t%s\n", "", bit_array_name[i]); 76870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung } 76970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung } 77070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung return offset; 77170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung} 77270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 77370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hungint pcm_params_to_string(struct pcm_params *params, char *string, unsigned int size) 77470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung{ 77570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung struct pcm_mask *m; 77670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung unsigned int min, max; 77770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung unsigned int clipoffset, offset; 77870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 77970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung m = pcm_params_get_mask(params, PCM_PARAM_ACCESS); 78070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung offset = pcm_mask_to_string(m, string, size, 78170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "Access", access_lookup, ARRAY_SIZE(access_lookup)); 78270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung m = pcm_params_get_mask(params, PCM_PARAM_FORMAT); 78370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung clipoffset = offset > size ? size : offset; 78470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung offset += pcm_mask_to_string(m, string + clipoffset, size - clipoffset, 78570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "Format", format_lookup, ARRAY_SIZE(format_lookup)); 78670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung m = pcm_params_get_mask(params, PCM_PARAM_SUBFORMAT); 78770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung clipoffset = offset > size ? size : offset; 78870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung offset += pcm_mask_to_string(m, string + clipoffset, size - clipoffset, 78970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung "Subformat", subformat_lookup, ARRAY_SIZE(subformat_lookup)); 79070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung min = pcm_params_get_min(params, PCM_PARAM_RATE); 79170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung max = pcm_params_get_max(params, PCM_PARAM_RATE); 79270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung STRLOG(string, offset, size, " Rate:\tmin=%uHz\tmax=%uHz\n", min, max); 79370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung min = pcm_params_get_min(params, PCM_PARAM_CHANNELS); 79470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung max = pcm_params_get_max(params, PCM_PARAM_CHANNELS); 79570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung STRLOG(string, offset, size, " Channels:\tmin=%u\t\tmax=%u\n", min, max); 79670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung min = pcm_params_get_min(params, PCM_PARAM_SAMPLE_BITS); 79770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung max = pcm_params_get_max(params, PCM_PARAM_SAMPLE_BITS); 79870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung STRLOG(string, offset, size, " Sample bits:\tmin=%u\t\tmax=%u\n", min, max); 79970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung min = pcm_params_get_min(params, PCM_PARAM_PERIOD_SIZE); 80070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung max = pcm_params_get_max(params, PCM_PARAM_PERIOD_SIZE); 80170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung STRLOG(string, offset, size, " Period size:\tmin=%u\t\tmax=%u\n", min, max); 80270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung min = pcm_params_get_min(params, PCM_PARAM_PERIODS); 80370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung max = pcm_params_get_max(params, PCM_PARAM_PERIODS); 80470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung STRLOG(string, offset, size, "Period count:\tmin=%u\t\tmax=%u\n", min, max); 80570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung return offset; 80670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung} 80770530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 80870530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hungint pcm_params_format_test(struct pcm_params *params, enum pcm_format format) 80970530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung{ 81070530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung unsigned int alsa_format = pcm_format_to_alsa(format); 81170530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 81270530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung if (alsa_format == SNDRV_PCM_FORMAT_S16_LE && format != PCM_FORMAT_S16_LE) 81370530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung return 0; /* caution: format not recognized is equivalent to S16_LE */ 81470530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung return pcm_mask_test(pcm_params_get_mask(params, PCM_PARAM_FORMAT), alsa_format); 81570530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung} 81670530a69767a9a383c5bf546e6e803aac08a5a1eAndy Hung 817edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonint pcm_close(struct pcm *pcm) 818edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 819edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (pcm == &bad_pcm) 820edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return 0; 821edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 822dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson pcm_hw_munmap_status(pcm); 823dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 824e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (pcm->flags & PCM_MMAP) { 825e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm_stop(pcm); 826e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson munmap(pcm->mmap_buffer, pcm_frames_to_bytes(pcm, pcm->buffer_size)); 827e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 828e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 829edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (pcm->fd >= 0) 830edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson close(pcm->fd); 8317a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah pcm->prepared = 0; 832edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->running = 0; 833edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->buffer_size = 0; 834edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->fd = -1; 835dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson free(pcm); 836edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return 0; 837edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 838edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 839edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonstruct pcm *pcm_open(unsigned int card, unsigned int device, 840edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson unsigned int flags, struct pcm_config *config) 841edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 842edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct pcm *pcm; 843edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct snd_pcm_info info; 844edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct snd_pcm_hw_params params; 845edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson struct snd_pcm_sw_params sparams; 846edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson char fn[256]; 847dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson int rc; 848edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 849edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm = calloc(1, sizeof(struct pcm)); 850edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (!pcm || !config) 851edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return &bad_pcm; /* TODO: could support default config here */ 852edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 853edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->config = *config; 854edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 855edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson snprintf(fn, sizeof(fn), "/dev/snd/pcmC%uD%u%c", card, device, 856edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson flags & PCM_IN ? 'c' : 'p'); 857edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 858edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->flags = flags; 859edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->fd = open(fn, O_RDWR); 860edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (pcm->fd < 0) { 861edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson oops(pcm, errno, "cannot open device '%s'", fn); 862edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return pcm; 863edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 864edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 865edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_INFO, &info)) { 866edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson oops(pcm, errno, "cannot get info"); 867e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson goto fail_close; 868edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 869edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 870edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson param_init(¶ms); 871edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson param_set_mask(¶ms, SNDRV_PCM_HW_PARAM_FORMAT, 872edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm_format_to_alsa(config->format)); 873edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson param_set_mask(¶ms, SNDRV_PCM_HW_PARAM_SUBFORMAT, 874edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson SNDRV_PCM_SUBFORMAT_STD); 875edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson param_set_min(¶ms, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, config->period_size); 876edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson param_set_int(¶ms, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 877edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm_format_to_bits(config->format)); 878edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson param_set_int(¶ms, SNDRV_PCM_HW_PARAM_FRAME_BITS, 879edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm_format_to_bits(config->format) * config->channels); 880edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson param_set_int(¶ms, SNDRV_PCM_HW_PARAM_CHANNELS, 881edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson config->channels); 882edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson param_set_int(¶ms, SNDRV_PCM_HW_PARAM_PERIODS, config->period_count); 883edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson param_set_int(¶ms, SNDRV_PCM_HW_PARAM_RATE, config->rate); 884edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 885e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (flags & PCM_NOIRQ) { 886e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (!(flags & PCM_MMAP)) { 887e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson oops(pcm, -EINVAL, "noirq only currently supported with mmap()."); 888e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson goto fail; 889e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 890e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 891e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson params.flags |= SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP; 892e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm->noirq_frames_per_msec = config->rate / 1000; 893e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 894e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 895e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (flags & PCM_MMAP) 896e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson param_set_mask(¶ms, SNDRV_PCM_HW_PARAM_ACCESS, 897b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 898e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson else 899e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson param_set_mask(¶ms, SNDRV_PCM_HW_PARAM_ACCESS, 900b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean SNDRV_PCM_ACCESS_RW_INTERLEAVED); 901e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 902edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_HW_PARAMS, ¶ms)) { 903edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson oops(pcm, errno, "cannot set hw params"); 904e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson goto fail_close; 905edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 906edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 907e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* get our refined hw_params */ 908e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson config->period_size = param_get_int(¶ms, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 909e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson config->period_count = param_get_int(¶ms, SNDRV_PCM_HW_PARAM_PERIODS); 910e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm->buffer_size = config->period_count * config->period_size; 911e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 912e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (flags & PCM_MMAP) { 913e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm->mmap_buffer = mmap(NULL, pcm_frames_to_bytes(pcm, pcm->buffer_size), 914e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED, pcm->fd, 0); 915e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (pcm->mmap_buffer == MAP_FAILED) { 916e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson oops(pcm, -errno, "failed to mmap buffer %d bytes\n", 917e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm_frames_to_bytes(pcm, pcm->buffer_size)); 918e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson goto fail_close; 919e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 920e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 921e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 922edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson memset(&sparams, 0, sizeof(sparams)); 923dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson sparams.tstamp_mode = SNDRV_PCM_TSTAMP_ENABLE; 924edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson sparams.period_step = 1; 925c1239623c178f0142352c28a0f968d826afcb078Simon Wilson 926ff2e54293f32b5bb5ff75b4cb25babb00f429ca4Eric Laurent if (!config->start_threshold) { 927ff2e54293f32b5bb5ff75b4cb25babb00f429ca4Eric Laurent if (pcm->flags & PCM_IN) 928ff2e54293f32b5bb5ff75b4cb25babb00f429ca4Eric Laurent pcm->config.start_threshold = sparams.start_threshold = 1; 929ff2e54293f32b5bb5ff75b4cb25babb00f429ca4Eric Laurent else 930ff2e54293f32b5bb5ff75b4cb25babb00f429ca4Eric Laurent pcm->config.start_threshold = sparams.start_threshold = 931ff2e54293f32b5bb5ff75b4cb25babb00f429ca4Eric Laurent config->period_count * config->period_size / 2; 932ff2e54293f32b5bb5ff75b4cb25babb00f429ca4Eric Laurent } else 933c1239623c178f0142352c28a0f968d826afcb078Simon Wilson sparams.start_threshold = config->start_threshold; 934c1239623c178f0142352c28a0f968d826afcb078Simon Wilson 935e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* pick a high stop threshold - todo: does this need further tuning */ 9361b32ddfd35e54b0a6ef1e43ca35dbc1547e5676aEric Laurent if (!config->stop_threshold) { 9371b32ddfd35e54b0a6ef1e43ca35dbc1547e5676aEric Laurent if (pcm->flags & PCM_IN) 9381b32ddfd35e54b0a6ef1e43ca35dbc1547e5676aEric Laurent pcm->config.stop_threshold = sparams.stop_threshold = 9391b32ddfd35e54b0a6ef1e43ca35dbc1547e5676aEric Laurent config->period_count * config->period_size * 10; 9401b32ddfd35e54b0a6ef1e43ca35dbc1547e5676aEric Laurent else 9411b32ddfd35e54b0a6ef1e43ca35dbc1547e5676aEric Laurent pcm->config.stop_threshold = sparams.stop_threshold = 9421b32ddfd35e54b0a6ef1e43ca35dbc1547e5676aEric Laurent config->period_count * config->period_size; 9431b32ddfd35e54b0a6ef1e43ca35dbc1547e5676aEric Laurent } 944c1239623c178f0142352c28a0f968d826afcb078Simon Wilson else 945c1239623c178f0142352c28a0f968d826afcb078Simon Wilson sparams.stop_threshold = config->stop_threshold; 946c1239623c178f0142352c28a0f968d826afcb078Simon Wilson 94773b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent if (!pcm->config.avail_min) { 94873b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent if (pcm->flags & PCM_MMAP) 94973b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->config.avail_min = sparams.avail_min = pcm->config.period_size; 95073b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent else 95173b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->config.avail_min = sparams.avail_min = 1; 95273b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent } else 95373b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent sparams.avail_min = config->avail_min; 95473b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent 955edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson sparams.xfer_align = config->period_size / 2; /* needed for old kernels */ 956c1239623c178f0142352c28a0f968d826afcb078Simon Wilson sparams.silence_threshold = config->silence_threshold; 957e25fe0b50ea717a9f347dcb927d396e8772e6362Maneet Singh sparams.silence_size = config->silence_size; 958e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm->boundary = sparams.boundary = pcm->buffer_size; 959c1239623c178f0142352c28a0f968d826afcb078Simon Wilson 960daa83291944318d8face12c780dfb69ae96b0723Simon Wilson while (pcm->boundary * 2 <= INT_MAX - pcm->buffer_size) 961b25ece4c48ed459c83320343307d8c827ebe06a4Paul McLean pcm->boundary *= 2; 962edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 963edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_SW_PARAMS, &sparams)) { 964edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson oops(pcm, errno, "cannot set sw params"); 965edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson goto fail; 966edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson } 967edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 968dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson rc = pcm_hw_mmap_status(pcm); 969dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson if (rc < 0) { 970dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson oops(pcm, rc, "mmap status failed"); 971dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson goto fail; 972dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson } 973dd88f13d9b398c132e3358c62137ff2e23f321abSimon Wilson 9746b0a206624ebe78cc10dba7015438371d1506de5Glenn Kasten#ifdef SNDRV_PCM_IOCTL_TTSTAMP 9756b0a206624ebe78cc10dba7015438371d1506de5Glenn Kasten if (pcm->flags & PCM_MONOTONIC) { 9766b0a206624ebe78cc10dba7015438371d1506de5Glenn Kasten int arg = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 9776b0a206624ebe78cc10dba7015438371d1506de5Glenn Kasten rc = ioctl(pcm->fd, SNDRV_PCM_IOCTL_TTSTAMP, &arg); 9786b0a206624ebe78cc10dba7015438371d1506de5Glenn Kasten if (rc < 0) { 9796b0a206624ebe78cc10dba7015438371d1506de5Glenn Kasten oops(pcm, rc, "cannot set timestamp type"); 9806b0a206624ebe78cc10dba7015438371d1506de5Glenn Kasten goto fail; 9816b0a206624ebe78cc10dba7015438371d1506de5Glenn Kasten } 9826b0a206624ebe78cc10dba7015438371d1506de5Glenn Kasten } 9836b0a206624ebe78cc10dba7015438371d1506de5Glenn Kasten#endif 9846b0a206624ebe78cc10dba7015438371d1506de5Glenn Kasten 985edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->underruns = 0; 986edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return pcm; 987edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 988edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonfail: 989e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (flags & PCM_MMAP) 990e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson munmap(pcm->mmap_buffer, pcm_frames_to_bytes(pcm, pcm->buffer_size)); 991e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonfail_close: 992edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson close(pcm->fd); 993edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson pcm->fd = -1; 994edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return pcm; 995edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 996edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson 997edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilsonint pcm_is_ready(struct pcm *pcm) 998edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson{ 999edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson return pcm->fd >= 0; 1000edff708e3129d7d8e05bbdfb624af97a3264a332Simon Wilson} 100170d77088678cf120d37602c66580287914781aaaSimon Wilson 10027a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullahint pcm_prepare(struct pcm *pcm) 100370d77088678cf120d37602c66580287914781aaaSimon Wilson{ 10047a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah if (pcm->prepared) 10057a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah return 0; 10067a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah 100770d77088678cf120d37602c66580287914781aaaSimon Wilson if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_PREPARE) < 0) 100870d77088678cf120d37602c66580287914781aaaSimon Wilson return oops(pcm, errno, "cannot prepare channel"); 1009e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 10107a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah pcm->prepared = 1; 10117a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah return 0; 10127a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah} 10137a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah 10147a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullahint pcm_start(struct pcm *pcm) 10157a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah{ 10167a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah int prepare_error = pcm_prepare(pcm); 10177a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah if (prepare_error) 10187a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah return prepare_error; 10197a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah 1020e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (pcm->flags & PCM_MMAP) 1021e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm_sync_ptr(pcm, 0); 1022e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 102370d77088678cf120d37602c66580287914781aaaSimon Wilson if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_START) < 0) 102470d77088678cf120d37602c66580287914781aaaSimon Wilson return oops(pcm, errno, "cannot start channel"); 102570d77088678cf120d37602c66580287914781aaaSimon Wilson 1026e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm->running = 1; 102770d77088678cf120d37602c66580287914781aaaSimon Wilson return 0; 102870d77088678cf120d37602c66580287914781aaaSimon Wilson} 102970d77088678cf120d37602c66580287914781aaaSimon Wilson 103070d77088678cf120d37602c66580287914781aaaSimon Wilsonint pcm_stop(struct pcm *pcm) 103170d77088678cf120d37602c66580287914781aaaSimon Wilson{ 103270d77088678cf120d37602c66580287914781aaaSimon Wilson if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_DROP) < 0) 103370d77088678cf120d37602c66580287914781aaaSimon Wilson return oops(pcm, errno, "cannot stop channel"); 103470d77088678cf120d37602c66580287914781aaaSimon Wilson 10357a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah pcm->prepared = 0; 1036e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm->running = 0; 1037e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return 0; 1038e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 1039e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1040e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonstatic inline int pcm_mmap_playback_avail(struct pcm *pcm) 1041e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 1042e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson int avail; 1043e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1044e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson avail = pcm->mmap_status->hw_ptr + pcm->buffer_size - pcm->mmap_control->appl_ptr; 1045e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1046e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (avail < 0) 1047e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson avail += pcm->boundary; 1048e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson else if (avail > (int)pcm->boundary) 1049e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson avail -= pcm->boundary; 1050e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1051e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return avail; 1052e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 1053e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1054e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonstatic inline int pcm_mmap_capture_avail(struct pcm *pcm) 1055e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 1056e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson int avail = pcm->mmap_status->hw_ptr - pcm->mmap_control->appl_ptr; 1057e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (avail < 0) 1058e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson avail += pcm->boundary; 1059e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return avail; 1060e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 1061e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 10626188c412b0533c28f67ca2f10f59f8fc4ec80a62Dylan Reidint pcm_mmap_avail(struct pcm *pcm) 1063e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 1064e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm_sync_ptr(pcm, SNDRV_PCM_SYNC_PTR_HWSYNC); 1065e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (pcm->flags & PCM_IN) 1066e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return pcm_mmap_capture_avail(pcm); 1067e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson else 1068e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return pcm_mmap_playback_avail(pcm); 1069e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 1070e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1071e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonstatic void pcm_mmap_appl_forward(struct pcm *pcm, int frames) 1072e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 1073e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson unsigned int appl_ptr = pcm->mmap_control->appl_ptr; 1074e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson appl_ptr += frames; 1075e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1076e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* check for boundary wrap */ 1077e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (appl_ptr > pcm->boundary) 1078e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson appl_ptr -= pcm->boundary; 1079e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm->mmap_control->appl_ptr = appl_ptr; 1080e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 1081e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1082e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonint pcm_mmap_begin(struct pcm *pcm, void **areas, unsigned int *offset, 1083e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson unsigned int *frames) 1084e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 1085e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson unsigned int continuous, copy_frames, avail; 1086e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1087e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* return the mmap buffer */ 1088e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson *areas = pcm->mmap_buffer; 1089e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1090e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* and the application offset in frames */ 1091e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson *offset = pcm->mmap_control->appl_ptr % pcm->buffer_size; 1092e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1093e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson avail = pcm_mmap_avail(pcm); 1094e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (avail > pcm->buffer_size) 1095e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson avail = pcm->buffer_size; 1096e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson continuous = pcm->buffer_size - *offset; 1097e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1098e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* we can only copy frames if the are availabale and continuos */ 1099e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson copy_frames = *frames; 1100e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (copy_frames > avail) 1101e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson copy_frames = avail; 1102e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (copy_frames > continuous) 1103e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson copy_frames = continuous; 1104e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson *frames = copy_frames; 1105e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 110670d77088678cf120d37602c66580287914781aaaSimon Wilson return 0; 110770d77088678cf120d37602c66580287914781aaaSimon Wilson} 110870d77088678cf120d37602c66580287914781aaaSimon Wilson 1109e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonint pcm_mmap_commit(struct pcm *pcm, unsigned int offset, unsigned int frames) 1110e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 1111e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* update the application pointer in userspace and kernel */ 1112e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm_mmap_appl_forward(pcm, frames); 1113e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm_sync_ptr(pcm, 0); 1114e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1115e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return frames; 1116e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 1117e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1118e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonint pcm_avail_update(struct pcm *pcm) 1119e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 1120e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pcm_sync_ptr(pcm, 0); 1121e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return pcm_mmap_avail(pcm); 1122e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 1123e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1124e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonint pcm_state(struct pcm *pcm) 1125e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 1126e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson int err = pcm_sync_ptr(pcm, 0); 1127e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (err < 0) 1128e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return err; 1129e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1130e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return pcm->mmap_status->state; 1131e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 1132e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 113373b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurentint pcm_set_avail_min(struct pcm *pcm, int avail_min) 113473b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent{ 113573b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent if ((~pcm->flags) & (PCM_MMAP | PCM_NOIRQ)) 113673b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent return -ENOSYS; 113773b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent 113873b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->config.avail_min = avail_min; 113973b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent return 0; 114073b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent} 114173b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent 1142e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilsonint pcm_wait(struct pcm *pcm, int timeout) 1143e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 1144e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson struct pollfd pfd; 1145e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson int err; 1146e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1147e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pfd.fd = pcm->fd; 1148e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson pfd.events = POLLOUT | POLLERR | POLLNVAL; 1149e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1150e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson do { 1151e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* let's wait for avail or timeout */ 1152e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson err = poll(&pfd, 1, timeout); 1153e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (err < 0) 1154e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return -errno; 1155e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1156e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* timeout ? */ 1157e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (err == 0) 1158e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return 0; 1159e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1160e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* have we been interrupted ? */ 1161e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (errno == -EINTR) 1162e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson continue; 1163e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1164e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* check for any errors */ 1165e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (pfd.revents & (POLLERR | POLLNVAL)) { 1166e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson switch (pcm_state(pcm)) { 1167e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson case PCM_STATE_XRUN: 1168e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return -EPIPE; 1169e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson case PCM_STATE_SUSPENDED: 1170e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return -ESTRPIPE; 1171e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson case PCM_STATE_DISCONNECTED: 1172e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return -ENODEV; 1173e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson default: 1174e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return -EIO; 1175e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 1176e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 1177e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* poll again if fd not ready for IO */ 1178e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } while (!(pfd.revents & (POLLIN | POLLOUT))); 1179e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1180e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return 1; 1181e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 1182e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1183b42510d55bafc96805a44bd6ac40faac28ebd219Dylan Reidint pcm_get_poll_fd(struct pcm *pcm) 1184b42510d55bafc96805a44bd6ac40faac28ebd219Dylan Reid{ 1185b42510d55bafc96805a44bd6ac40faac28ebd219Dylan Reid return pcm->fd; 1186b42510d55bafc96805a44bd6ac40faac28ebd219Dylan Reid} 1187b42510d55bafc96805a44bd6ac40faac28ebd219Dylan Reid 1188c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurentint pcm_mmap_transfer(struct pcm *pcm, const void *buffer, unsigned int bytes) 1189e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson{ 1190e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson int err = 0, frames, avail; 1191e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson unsigned int offset = 0, count; 1192e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1193e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (bytes == 0) 1194e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return 0; 1195e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1196e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson count = pcm_bytes_to_frames(pcm, bytes); 1197e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1198e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson while (count > 0) { 1199e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1200e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* get the available space for writing new frames */ 1201e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson avail = pcm_avail_update(pcm); 1202e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (avail < 0) { 1203e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson fprintf(stderr, "cannot determine available mmap frames"); 1204e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return err; 1205e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 1206e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1207e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* start the audio if we reach the threshold */ 1208e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (!pcm->running && 1209e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson (pcm->buffer_size - avail) >= pcm->config.start_threshold) { 1210e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (pcm_start(pcm) < 0) { 1211e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson fprintf(stderr, "start error: hw 0x%x app 0x%x avail 0x%x\n", 1212e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson (unsigned int)pcm->mmap_status->hw_ptr, 1213e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson (unsigned int)pcm->mmap_control->appl_ptr, 1214e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson avail); 1215e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return -errno; 1216e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 121773b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->wait_for_avail_min = 0; 1218e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 1219e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1220e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* sleep until we have space to write new frames */ 122173b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent if (pcm->running) { 122273b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent /* enable waiting for avail_min threshold when less frames than we have to write 122373b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent * are available. */ 122473b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent if (!pcm->wait_for_avail_min && (count > (unsigned int)avail)) 122573b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->wait_for_avail_min = 1; 122673b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent 122773b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent if (pcm->wait_for_avail_min && (avail < pcm->config.avail_min)) { 122873b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent int time = -1; 122973b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent 123073b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent /* disable waiting for avail_min threshold to allow small amounts of data to be 123173b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent * written without waiting as long as there is enough room in buffer. */ 123273b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->wait_for_avail_min = 0; 123373b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent 123473b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent if (pcm->flags & PCM_NOIRQ) 123573b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent time = (pcm->config.avail_min - avail) / pcm->noirq_frames_per_msec; 123673b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent 123773b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent err = pcm_wait(pcm, time); 123873b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent if (err < 0) { 12397a0b995d87f6b08d6370f36e48f056069d61aa12Omair Mohammed Abdullah pcm->prepared = 0; 124073b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->running = 0; 124173b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent oops(pcm, err, "wait error: hw 0x%x app 0x%x avail 0x%x\n", 124273b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent (unsigned int)pcm->mmap_status->hw_ptr, 124373b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent (unsigned int)pcm->mmap_control->appl_ptr, 124473b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent avail); 124573b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent pcm->mmap_control->appl_ptr = 0; 124673b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent return err; 124773b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent } 124873b9c679a656c7b0f5e265dae5a76664c7d03031Eric Laurent continue; 1249e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 1250e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 1251e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1252e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson frames = count; 1253e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (frames > avail) 1254e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson frames = avail; 1255e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1256e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (!frames) 1257e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson break; 1258e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1259e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson /* copy frames from buffer */ 1260c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent frames = pcm_mmap_transfer_areas(pcm, (void *)buffer, offset, frames); 1261e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson if (frames < 0) { 1262e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson fprintf(stderr, "write error: hw 0x%x app 0x%x avail 0x%x\n", 1263e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson (unsigned int)pcm->mmap_status->hw_ptr, 1264e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson (unsigned int)pcm->mmap_control->appl_ptr, 1265e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson avail); 1266e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return frames; 1267e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 1268e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1269e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson offset += frames; 1270e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson count -= frames; 1271e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson } 1272e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson 1273e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson return 0; 1274e9942c8b1fab1cea4836b5af2dd59a1bf0ad411dSimon Wilson} 1275c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent 1276c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurentint pcm_mmap_write(struct pcm *pcm, const void *data, unsigned int count) 1277c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent{ 1278c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent if ((~pcm->flags) & (PCM_OUT | PCM_MMAP)) 1279c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent return -ENOSYS; 1280c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent 1281c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent return pcm_mmap_transfer(pcm, (void *)data, count); 1282c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent} 1283c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent 1284c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurentint pcm_mmap_read(struct pcm *pcm, void *data, unsigned int count) 1285c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent{ 1286c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent if ((~pcm->flags) & (PCM_IN | PCM_MMAP)) 1287c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent return -ENOSYS; 1288c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent 1289c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent return pcm_mmap_transfer(pcm, data, count); 1290c98da79067d89d934c4eb7de6a03e412eb421a5cEric Laurent} 1291892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli 1292892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalliint pcm_ioctl(struct pcm *pcm, int request, ...) 1293892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli{ 1294892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli va_list ap; 1295892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli void * arg; 1296892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli 1297892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli if (!pcm_is_ready(pcm)) 1298892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli return -1; 1299892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli 1300892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli va_start(ap, request); 1301892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli arg = va_arg(ap, void *); 1302892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli va_end(ap); 1303892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli 1304892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli return ioctl(pcm->fd, request, arg); 1305892d6a54971fa244570b504c2cf4f818f668a8d6Shiv Maliyappanahalli} 1306