19682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* 29682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL - Simple DirectMedia Layer 39682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Copyright (C) 1997-2012 Sam Lantinga 49682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 59682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is free software; you can redistribute it and/or 69682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall modify it under the terms of the GNU Library General Public 79682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License as published by the Free Software Foundation; either 89682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall version 2 of the License, or (at your option) any later version. 99682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is distributed in the hope that it will be useful, 119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall but WITHOUT ANY WARRANTY; without even the implied warranty of 129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Library General Public License for more details. 149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall You should have received a copy of the GNU Library General Public 169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License along with this library; if not, write to the Free 179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sam Lantinga 209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall slouken@libsdl.org 219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall*/ 229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_config.h" 239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <errno.h> 259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <unistd.h> 269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <fcntl.h> 279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <signal.h> 289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <sys/types.h> 299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <sys/time.h> 309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <sched.h> 319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <sys/select.h> 329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <sys/neutrino.h> 339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <sys/asoundlib.h> 349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_timer.h" 369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_audio.h" 379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "../SDL_audiomem.h" 389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "../SDL_audio_c.h" 399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_nto_audio.h" 409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* The tag name used by NTO audio */ 429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define DRIVER_NAME "qsa-nto" 439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* default channel communication parameters */ 459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define DEFAULT_CPARAMS_RATE 22050 469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define DEFAULT_CPARAMS_VOICES 1 479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* FIXME: need to add in the near future flexible logic with frag_size and frags count */ 489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define DEFAULT_CPARAMS_FRAG_SIZE 4096 499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define DEFAULT_CPARAMS_FRAGS_MIN 1 509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define DEFAULT_CPARAMS_FRAGS_MAX 1 519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Open the audio device for playback, and don't block if busy */ 539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define OPEN_FLAGS SND_PCM_OPEN_PLAYBACK 549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define QSA_NO_WORKAROUNDS 0x00000000 569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define QSA_MMAP_WORKAROUND 0x00000001 579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstruct BuggyCards 599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall char* cardname; 619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall unsigned long bugtype; 629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall}; 639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define QSA_WA_CARDS 3 659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstruct BuggyCards buggycards[QSA_WA_CARDS]= 679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall {"Sound Blaster Live!", QSA_MMAP_WORKAROUND}, 699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall {"Vortex 8820", QSA_MMAP_WORKAROUND}, 709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall {"Vortex 8830", QSA_MMAP_WORKAROUND}, 719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall}; 729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Audio driver functions */ 749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void NTO_ThreadInit(_THIS); 759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int NTO_OpenAudio(_THIS, SDL_AudioSpec* spec); 769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void NTO_WaitAudio(_THIS); 779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void NTO_PlayAudio(_THIS); 789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic Uint8* NTO_GetAudioBuf(_THIS); 799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void NTO_CloseAudio(_THIS); 809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* card names check to apply the workarounds */ 829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int NTO_CheckBuggyCards(_THIS, unsigned long checkfor) 839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall char scardname[33]; 859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int it; 869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (snd_card_get_name(cardno, scardname, 32)<0) 889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return 0; 909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for (it=0; it<QSA_WA_CARDS; it++) 939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (SDL_strcmp(buggycards[it].cardname, scardname)==0) 959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (buggycards[it].bugtype==checkfor) 979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return 1; 999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return 0; 1049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void NTO_ThreadInit(_THIS) 1079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int status; 1099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall struct sched_param param; 1109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* increasing default 10 priority to 25 to avoid jerky sound */ 1129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall status=SchedGet(0, 0, ¶m); 1139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall param.sched_priority=param.sched_curpriority+15; 1149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall status=SchedSet(0, 0, SCHED_NOCHANGE, ¶m); 1159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* PCM transfer channel parameters initialize function */ 1189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void NTO_InitAudioParams(snd_pcm_channel_params_t* cpars) 1199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memset(cpars, 0, sizeof(snd_pcm_channel_params_t)); 1219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cpars->channel = SND_PCM_CHANNEL_PLAYBACK; 1239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cpars->mode = SND_PCM_MODE_BLOCK; 1249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cpars->start_mode = SND_PCM_START_DATA; 1259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cpars->stop_mode = SND_PCM_STOP_STOP; 1269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cpars->format.format = SND_PCM_SFMT_S16_LE; 1279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cpars->format.interleave = 1; 1289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cpars->format.rate = DEFAULT_CPARAMS_RATE; 1299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cpars->format.voices = DEFAULT_CPARAMS_VOICES; 1309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE; 1319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN; 1329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX; 1339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int NTO_AudioAvailable(void) 1369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* See if we can open a nonblocking channel. 1389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Return value '1' means we can. 1399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Return value '0' means we cannot. */ 1409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int available; 1429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int rval; 1439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall snd_pcm_t* handle; 1449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall available = 0; 1469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall handle = NULL; 1479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall rval = snd_pcm_open_preferred(&handle, NULL, NULL, OPEN_FLAGS); 1499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (rval >= 0) 1519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall available = 1; 1539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((rval = snd_pcm_close(handle)) < 0) 1559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_AudioAvailable(): snd_pcm_close failed: %s\n", snd_strerror(rval)); 1579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall available = 0; 1589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall else 1619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_AudioAvailable(): there are no available audio devices.\n"); 1639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return (available); 1669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void NTO_DeleteAudioDevice(SDL_AudioDevice *device) 1699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((device)&&(device->hidden)) 1719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_free(device->hidden); 1739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (device) 1759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_free(device); 1779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic SDL_AudioDevice* NTO_CreateAudioDevice(int devindex) 1819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_AudioDevice *this; 1839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Initialize all variables that we clean on shutdown */ 1859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); 1869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (this) 1879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memset(this, 0, sizeof(SDL_AudioDevice)); 1899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->hidden = (struct SDL_PrivateAudioData *)SDL_malloc(sizeof(struct SDL_PrivateAudioData)); 1909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((this == NULL) || (this->hidden == NULL)) 1929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_OutOfMemory(); 1949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (this) 1959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 1969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_free(this); 1979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return (0); 1999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memset(this->hidden, 0, sizeof(struct SDL_PrivateAudioData)); 2019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall audio_handle = NULL; 2029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set the function pointers */ 2049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->ThreadInit = NTO_ThreadInit; 2059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->OpenAudio = NTO_OpenAudio; 2069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->WaitAudio = NTO_WaitAudio; 2079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->PlayAudio = NTO_PlayAudio; 2089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->GetAudioBuf = NTO_GetAudioBuf; 2099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->CloseAudio = NTO_CloseAudio; 2109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->free = NTO_DeleteAudioDevice; 2129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return this; 2149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse HallAudioBootStrap QNXNTOAUDIO_bootstrap = 2179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DRIVER_NAME, "QNX6 QSA-NTO Audio", 2199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall NTO_AudioAvailable, 2209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall NTO_CreateAudioDevice 2219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall}; 2229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* This function waits until it is possible to write a full sound buffer */ 2249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void NTO_WaitAudio(_THIS) 2259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall fd_set wfds; 2279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int selectret; 2289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall FD_ZERO(&wfds); 2309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall FD_SET(audio_fd, &wfds); 2319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall do { 2339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall selectret=select(audio_fd + 1, NULL, &wfds, NULL, NULL); 2349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch (selectret) 2359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case -1: 2379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 0: SDL_SetError("NTO_WaitAudio(): select() failed: %s\n", strerror(errno)); 2389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return; 2399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall default: if (FD_ISSET(audio_fd, &wfds)) 2409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return; 2429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 2449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } while(1); 2469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void NTO_PlayAudio(_THIS) 2499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int written, rval; 2519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int towrite; 2529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall void* pcmbuffer; 2539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (!this->enabled) 2559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return; 2579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall towrite = this->spec.size; 2609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pcmbuffer = pcm_buf; 2619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Write the audio data, checking for EAGAIN (buffer full) and underrun */ 2639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall do { 2649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall written = snd_pcm_plugin_write(audio_handle, pcm_buf, towrite); 2659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (written != towrite) 2669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) 2689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Let a little CPU time go by and try to write again */ 2709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Delay(1); 2719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* if we wrote some data */ 2729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall towrite -= written; 2739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pcmbuffer += written * this->spec.channels; 2749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall continue; 2759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall else 2779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((errno == EINVAL) || (errno == EIO)) 2799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memset(&cstatus, 0, sizeof(cstatus)); 2819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cstatus.channel = SND_PCM_CHANNEL_PLAYBACK; 2829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((rval = snd_pcm_plugin_status(audio_handle, &cstatus)) < 0) 2839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_PlayAudio(): snd_pcm_plugin_status failed: %s\n", snd_strerror(rval)); 2859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return; 2869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) || (cstatus.status == SND_PCM_STATUS_READY)) 2889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((rval = snd_pcm_plugin_prepare(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0) 2909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_PlayAudio(): snd_pcm_plugin_prepare failed: %s\n", snd_strerror(rval)); 2929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return; 2939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall continue; 2969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall else 2989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 2999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return; 3009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall else 3049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* we wrote all remaining data */ 3069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall towrite -= written; 3079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pcmbuffer += written * this->spec.channels; 3089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } while ((towrite > 0) && (this->enabled)); 3109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* If we couldn't write, assume fatal error for now */ 3129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (towrite != 0) 3139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->enabled = 0; 3159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return; 3189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 3199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic Uint8* NTO_GetAudioBuf(_THIS) 3219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 3229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return pcm_buf; 3239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 3249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void NTO_CloseAudio(_THIS) 3269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 3279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int rval; 3289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->enabled = 0; 3309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (audio_handle != NULL) 3329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((rval = snd_pcm_plugin_flush(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0) 3349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_CloseAudio(): snd_pcm_plugin_flush failed: %s\n", snd_strerror(rval)); 3369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return; 3379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((rval = snd_pcm_close(audio_handle)) < 0) 3399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_CloseAudio(): snd_pcm_close failed: %s\n",snd_strerror(rval)); 3419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return; 3429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall audio_handle = NULL; 3449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 3469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int NTO_OpenAudio(_THIS, SDL_AudioSpec* spec) 3489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 3499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int rval; 3509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int format; 3519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 test_format; 3529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int found; 3539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall audio_handle = NULL; 3559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->enabled = 0; 3569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (pcm_buf != NULL) 3589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_FreeAudioMem(pcm_buf); 3609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pcm_buf = NULL; 3619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* initialize channel transfer parameters to default */ 3649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall NTO_InitAudioParams(&cparams); 3659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Open the audio device */ 3679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall rval = snd_pcm_open_preferred(&audio_handle, &cardno, &deviceno, OPEN_FLAGS); 3689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (rval < 0) 3699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_OpenAudio(): snd_pcm_open failed: %s\n", snd_strerror(rval)); 3719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return (-1); 3729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (!NTO_CheckBuggyCards(this, QSA_MMAP_WORKAROUND)) 3759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* enable count status parameter */ 3779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((rval = snd_pcm_plugin_set_disable(audio_handle, PLUGIN_DISABLE_MMAP)) < 0) 3789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("snd_pcm_plugin_set_disable failed: %s\n", snd_strerror(rval)); 3809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return (-1); 3819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Try for a closest match on audio format */ 3859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall format = 0; 3869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* can't use format as SND_PCM_SFMT_U8 = 0 in nto */ 3879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall found = 0; 3889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for (test_format=SDL_FirstAudioFormat(spec->format); !found ;) 3909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* if match found set format to equivalent ALSA format */ 3929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch (test_format) 3939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 3949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case AUDIO_U8: 3959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall format = SND_PCM_SFMT_U8; 3969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall found = 1; 3979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 3989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case AUDIO_S8: 3999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall format = SND_PCM_SFMT_S8; 4009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall found = 1; 4019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 4029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case AUDIO_S16LSB: 4039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall format = SND_PCM_SFMT_S16_LE; 4049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall found = 1; 4059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 4069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case AUDIO_S16MSB: 4079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall format = SND_PCM_SFMT_S16_BE; 4089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall found = 1; 4099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 4109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case AUDIO_U16LSB: 4119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall format = SND_PCM_SFMT_U16_LE; 4129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall found = 1; 4139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 4149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case AUDIO_U16MSB: 4159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall format = SND_PCM_SFMT_U16_BE; 4169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall found = 1; 4179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 4189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall default: 4199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 4209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (!found) 4239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 4249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall test_format = SDL_NextAudioFormat(); 4259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* assumes test_format not 0 on success */ 4299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (test_format == 0) 4309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 4319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_OpenAudio(): Couldn't find any hardware audio formats"); 4329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return (-1); 4339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall spec->format = test_format; 4369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set the audio format */ 4389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cparams.format.format = format; 4399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set mono or stereo audio (currently only two channels supported) */ 4419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cparams.format.voices = spec->channels; 4429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set rate */ 4449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall cparams.format.rate = spec->freq; 4459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Setup the transfer parameters according to cparams */ 4479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall rval = snd_pcm_plugin_params(audio_handle, &cparams); 4489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (rval < 0) 4499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 4509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_OpenAudio(): snd_pcm_channel_params failed: %s\n", snd_strerror(rval)); 4519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return (-1); 4529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Make sure channel is setup right one last time */ 4559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memset(&csetup, 0x00, sizeof(csetup)); 4569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall csetup.channel = SND_PCM_CHANNEL_PLAYBACK; 4579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (snd_pcm_plugin_setup(audio_handle, &csetup) < 0) 4589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 4599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_OpenAudio(): Unable to setup playback channel\n"); 4609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return -1; 4619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Calculate the final parameters for this audio specification */ 4659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_CalculateAudioSpec(spec); 4669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pcm_len = spec->size; 4689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (pcm_len==0) 4709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 4719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pcm_len = csetup.buf.block.frag_size * spec->channels * (snd_pcm_format_width(format)/8); 4729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Allocate memory to the audio buffer and initialize with silence (Note that 4759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall buffer size must be a multiple of fragment size, so find closest multiple) 4769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall */ 4779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall pcm_buf = (Uint8*)SDL_AllocAudioMem(pcm_len); 4789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (pcm_buf == NULL) 4799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 4809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_OpenAudio(): pcm buffer allocation failed\n"); 4819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return (-1); 4829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memset(pcm_buf, spec->silence, pcm_len); 4849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* get the file descriptor */ 4869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ((audio_fd = snd_pcm_file_descriptor(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0) 4879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 4889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("NTO_OpenAudio(): snd_pcm_file_descriptor failed with error code: %s\n", snd_strerror(rval)); 4899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return (-1); 4909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 4929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Trigger audio playback */ 4939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall rval = snd_pcm_plugin_prepare(audio_handle, SND_PCM_CHANNEL_PLAYBACK); 4949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (rval < 0) 4959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { 4969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("snd_pcm_plugin_prepare failed: %s\n", snd_strerror(rval)); 4979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return (-1); 4989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 4999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->enabled = 1; 5019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Get the parent process id (we're the parent of the audio thread) */ 5039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall parent = getpid(); 5049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 5059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* We're really ready to rock and roll. :-) */ 5069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return (0); 5079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 508