1/* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "usb_profile" 18/*#define LOG_NDEBUG 0*/ 19 20#include "format.h" 21 22#include <tinyalsa/asoundlib.h> 23 24#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) 25 26/* 27 * Maps from bit position in pcm_mask to AUDIO_ format constants. 28 */ 29static audio_format_t const format_value_map[] = { 30 AUDIO_FORMAT_PCM_8_BIT, /* 00 - SNDRV_PCM_FORMAT_S8 */ 31 AUDIO_FORMAT_PCM_8_BIT, /* 01 - SNDRV_PCM_FORMAT_U8 */ 32 AUDIO_FORMAT_PCM_16_BIT, /* 02 - SNDRV_PCM_FORMAT_S16_LE */ 33 AUDIO_FORMAT_INVALID, /* 03 - SNDRV_PCM_FORMAT_S16_BE */ 34 AUDIO_FORMAT_INVALID, /* 04 - SNDRV_PCM_FORMAT_U16_LE */ 35 AUDIO_FORMAT_INVALID, /* 05 - SNDRV_PCM_FORMAT_U16_BE */ 36 AUDIO_FORMAT_INVALID, /* 06 - SNDRV_PCM_FORMAT_S24_LE */ 37 AUDIO_FORMAT_INVALID, /* 07 - SNDRV_PCM_FORMAT_S24_BE */ 38 AUDIO_FORMAT_INVALID, /* 08 - SNDRV_PCM_FORMAT_U24_LE */ 39 AUDIO_FORMAT_INVALID, /* 09 - SNDRV_PCM_FORMAT_U24_BE */ 40 AUDIO_FORMAT_PCM_32_BIT, /* 10 - SNDRV_PCM_FORMAT_S32_LE */ 41 AUDIO_FORMAT_INVALID, /* 11 - SNDRV_PCM_FORMAT_S32_BE */ 42 AUDIO_FORMAT_INVALID, /* 12 - SNDRV_PCM_FORMAT_U32_LE */ 43 AUDIO_FORMAT_INVALID, /* 13 - SNDRV_PCM_FORMAT_U32_BE */ 44 AUDIO_FORMAT_PCM_FLOAT, /* 14 - SNDRV_PCM_FORMAT_FLOAT_LE */ 45 AUDIO_FORMAT_INVALID, /* 15 - SNDRV_PCM_FORMAT_FLOAT_BE */ 46 AUDIO_FORMAT_INVALID, /* 16 - SNDRV_PCM_FORMAT_FLOAT64_LE */ 47 AUDIO_FORMAT_INVALID, /* 17 - SNDRV_PCM_FORMAT_FLOAT64_BE */ 48 AUDIO_FORMAT_INVALID, /* 18 - SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE */ 49 AUDIO_FORMAT_INVALID, /* 19 - SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE */ 50 AUDIO_FORMAT_INVALID, /* 20 - SNDRV_PCM_FORMAT_MU_LAW */ 51 AUDIO_FORMAT_INVALID, /* 21 - SNDRV_PCM_FORMAT_A_LAW */ 52 AUDIO_FORMAT_INVALID, /* 22 - SNDRV_PCM_FORMAT_IMA_ADPCM */ 53 AUDIO_FORMAT_INVALID, /* 23 - SNDRV_PCM_FORMAT_MPEG */ 54 AUDIO_FORMAT_INVALID, /* 24 - SNDRV_PCM_FORMAT_GSM */ 55 AUDIO_FORMAT_INVALID, /* 25 -> 30 (not assigned) */ 56 AUDIO_FORMAT_INVALID, 57 AUDIO_FORMAT_INVALID, 58 AUDIO_FORMAT_INVALID, 59 AUDIO_FORMAT_INVALID, 60 AUDIO_FORMAT_INVALID, 61 AUDIO_FORMAT_INVALID, /* 31 - SNDRV_PCM_FORMAT_SPECIAL */ 62 AUDIO_FORMAT_PCM_24_BIT_PACKED, /* 32 - SNDRV_PCM_FORMAT_S24_3LE */ 63 AUDIO_FORMAT_INVALID, /* 33 - SNDRV_PCM_FORMAT_S24_3BE */ 64 AUDIO_FORMAT_INVALID, /* 34 - SNDRV_PCM_FORMAT_U24_3LE */ 65 AUDIO_FORMAT_INVALID, /* 35 - SNDRV_PCM_FORMAT_U24_3BE */ 66 AUDIO_FORMAT_INVALID, /* 36 - SNDRV_PCM_FORMAT_S20_3LE */ 67 AUDIO_FORMAT_INVALID, /* 37 - SNDRV_PCM_FORMAT_S20_3BE */ 68 AUDIO_FORMAT_INVALID, /* 38 - SNDRV_PCM_FORMAT_U20_3LE */ 69 AUDIO_FORMAT_INVALID, /* 39 - SNDRV_PCM_FORMAT_U20_3BE */ 70 AUDIO_FORMAT_INVALID, /* 40 - SNDRV_PCM_FORMAT_S18_3LE */ 71 AUDIO_FORMAT_INVALID, /* 41 - SNDRV_PCM_FORMAT_S18_3BE */ 72 AUDIO_FORMAT_INVALID, /* 42 - SNDRV_PCM_FORMAT_U18_3LE */ 73 AUDIO_FORMAT_INVALID, /* 43 - SNDRV_PCM_FORMAT_U18_3BE */ 74 AUDIO_FORMAT_INVALID, /* 44 - SNDRV_PCM_FORMAT_G723_24 */ 75 AUDIO_FORMAT_INVALID, /* 45 - SNDRV_PCM_FORMAT_G723_24_1B */ 76 AUDIO_FORMAT_INVALID, /* 46 - SNDRV_PCM_FORMAT_G723_40 */ 77 AUDIO_FORMAT_INVALID, /* 47 - SNDRV_PCM_FORMAT_G723_40_1B */ 78 AUDIO_FORMAT_INVALID, /* 48 - SNDRV_PCM_FORMAT_DSD_U8 */ 79 AUDIO_FORMAT_INVALID /* 49 - SNDRV_PCM_FORMAT_DSD_U16_LE */ 80}; 81 82audio_format_t get_format_for_mask(struct pcm_mask* mask) 83{ 84 int num_slots = sizeof(mask->bits) / sizeof(mask->bits[0]); 85 int bits_per_slot = sizeof(mask->bits[0]) * 8; 86 87 int table_size = sizeof(format_value_map) / sizeof(format_value_map[0]); 88 89 int slot_index, bit_index, table_index; 90 table_index = 0; 91 int num_written = 0; 92 for (slot_index = 0; slot_index < num_slots; slot_index++) { 93 unsigned bit_mask = 1; 94 for (bit_index = 0; bit_index < bits_per_slot; bit_index++) { 95 /* don't return b-bit formats even if they are supported */ 96 if (table_index >= 2 && (mask->bits[slot_index] & bit_mask) != 0) { 97 /* just return the first one */ 98 return table_index < table_size 99 ? format_value_map[table_index] 100 : AUDIO_FORMAT_INVALID; 101 } 102 bit_mask <<= 1; 103 table_index++; 104 } 105 } 106 107 return AUDIO_FORMAT_INVALID; 108} 109 110/* 111 * Maps from bit position in pcm_mask to PCM_ format constants. 112 */ 113int8_t const pcm_format_value_map[50] = { 114 PCM_FORMAT_S8, /* 00 - SNDRV_PCM_FORMAT_S8 */ 115 PCM_FORMAT_INVALID, /* 01 - SNDRV_PCM_FORMAT_U8 */ 116 PCM_FORMAT_S16_LE, /* 02 - SNDRV_PCM_FORMAT_S16_LE */ 117 PCM_FORMAT_INVALID, /* 03 - SNDRV_PCM_FORMAT_S16_BE */ 118 PCM_FORMAT_INVALID, /* 04 - SNDRV_PCM_FORMAT_U16_LE */ 119 PCM_FORMAT_INVALID, /* 05 - SNDRV_PCM_FORMAT_U16_BE */ 120 PCM_FORMAT_S24_3LE, /* 06 - SNDRV_PCM_FORMAT_S24_LE */ 121 PCM_FORMAT_INVALID, /* 07 - SNDRV_PCM_FORMAT_S24_BE */ 122 PCM_FORMAT_INVALID, /* 08 - SNDRV_PCM_FORMAT_U24_LE */ 123 PCM_FORMAT_INVALID, /* 09 - SNDRV_PCM_FORMAT_U24_BE */ 124 PCM_FORMAT_S32_LE, /* 10 - SNDRV_PCM_FORMAT_S32_LE */ 125 PCM_FORMAT_INVALID, /* 11 - SNDRV_PCM_FORMAT_S32_BE */ 126 PCM_FORMAT_INVALID, /* 12 - SNDRV_PCM_FORMAT_U32_LE */ 127 PCM_FORMAT_INVALID, /* 13 - SNDRV_PCM_FORMAT_U32_BE */ 128 PCM_FORMAT_INVALID, /* 14 - SNDRV_PCM_FORMAT_FLOAT_LE */ 129 PCM_FORMAT_INVALID, /* 15 - SNDRV_PCM_FORMAT_FLOAT_BE */ 130 PCM_FORMAT_INVALID, /* 16 - SNDRV_PCM_FORMAT_FLOAT64_LE */ 131 PCM_FORMAT_INVALID, /* 17 - SNDRV_PCM_FORMAT_FLOAT64_BE */ 132 PCM_FORMAT_INVALID, /* 18 - SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE */ 133 PCM_FORMAT_INVALID, /* 19 - SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE */ 134 PCM_FORMAT_INVALID, /* 20 - SNDRV_PCM_FORMAT_MU_LAW */ 135 PCM_FORMAT_INVALID, /* 21 - SNDRV_PCM_FORMAT_A_LAW */ 136 PCM_FORMAT_INVALID, /* 22 - SNDRV_PCM_FORMAT_IMA_ADPCM */ 137 PCM_FORMAT_INVALID, /* 23 - SNDRV_PCM_FORMAT_MPEG */ 138 PCM_FORMAT_INVALID, /* 24 - SNDRV_PCM_FORMAT_GSM */ 139 PCM_FORMAT_INVALID, /* 25 -> 30 (not assigned) */ 140 PCM_FORMAT_INVALID, 141 PCM_FORMAT_INVALID, 142 PCM_FORMAT_INVALID, 143 PCM_FORMAT_INVALID, 144 PCM_FORMAT_INVALID, 145 PCM_FORMAT_INVALID, /* 31 - SNDRV_PCM_FORMAT_SPECIAL */ 146 PCM_FORMAT_S24_3LE, /* 32 - SNDRV_PCM_FORMAT_S24_3LE */ /* ??? */ 147 PCM_FORMAT_INVALID, /* 33 - SNDRV_PCM_FORMAT_S24_3BE */ 148 PCM_FORMAT_INVALID, /* 34 - SNDRV_PCM_FORMAT_U24_3LE */ 149 PCM_FORMAT_INVALID, /* 35 - SNDRV_PCM_FORMAT_U24_3BE */ 150 PCM_FORMAT_INVALID, /* 36 - SNDRV_PCM_FORMAT_S20_3LE */ 151 PCM_FORMAT_INVALID, /* 37 - SNDRV_PCM_FORMAT_S20_3BE */ 152 PCM_FORMAT_INVALID, /* 38 - SNDRV_PCM_FORMAT_U20_3LE */ 153 PCM_FORMAT_INVALID, /* 39 - SNDRV_PCM_FORMAT_U20_3BE */ 154 PCM_FORMAT_INVALID, /* 40 - SNDRV_PCM_FORMAT_S18_3LE */ 155 PCM_FORMAT_INVALID, /* 41 - SNDRV_PCM_FORMAT_S18_3BE */ 156 PCM_FORMAT_INVALID, /* 42 - SNDRV_PCM_FORMAT_U18_3LE */ 157 PCM_FORMAT_INVALID, /* 43 - SNDRV_PCM_FORMAT_U18_3BE */ 158 PCM_FORMAT_INVALID, /* 44 - SNDRV_PCM_FORMAT_G723_24 */ 159 PCM_FORMAT_INVALID, /* 45 - SNDRV_PCM_FORMAT_G723_24_1B */ 160 PCM_FORMAT_INVALID, /* 46 - SNDRV_PCM_FORMAT_G723_40 */ 161 PCM_FORMAT_INVALID, /* 47 - SNDRV_PCM_FORMAT_G723_40_1B */ 162 PCM_FORMAT_INVALID, /* 48 - SNDRV_PCM_FORMAT_DSD_U8 */ 163 PCM_FORMAT_INVALID /* 49 - SNDRV_PCM_FORMAT_DSD_U16_LE */ 164}; 165 166/* 167 * Scans the provided format mask and returns the first non-8 bit sample 168 * format supported by the devices. 169 */ 170enum pcm_format get_pcm_format_for_mask(struct pcm_mask* mask) 171{ 172 int num_slots = ARRAY_SIZE(mask->bits); 173 int bits_per_slot = sizeof(mask->bits[0]) * 8; 174 175 int table_size = ARRAY_SIZE(pcm_format_value_map); 176 177 int slot_index, bit_index, table_index; 178 table_index = 0; 179 int num_written = 0; 180 for (slot_index = 0; slot_index < num_slots && table_index < table_size; slot_index++) { 181 unsigned bit_mask = 1; 182 for (bit_index = 0; bit_index < bits_per_slot && table_index < table_size; bit_index++) { 183 /* skip any 8-bit formats */ 184 if (table_index >= 2 && (mask->bits[slot_index] & bit_mask) != 0) { 185 /* just return the first one which will be at least 16-bit */ 186 return (int)pcm_format_value_map[table_index]; 187 } 188 bit_mask <<= 1; 189 table_index++; 190 } 191 } 192 193 return PCM_FORMAT_INVALID; 194} 195