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Diffstat (limited to '')
| -rw-r--r-- | src/modules/bluetooth/a2dp-codecs.h | 435 |
1 files changed, 435 insertions, 0 deletions
diff --git a/src/modules/bluetooth/a2dp-codecs.h b/src/modules/bluetooth/a2dp-codecs.h new file mode 100644 index 0000000..93e9d35 --- /dev/null +++ b/src/modules/bluetooth/a2dp-codecs.h @@ -0,0 +1,435 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2006-2010 Nokia Corporation + * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org> + * Copyright (C) 2018 Pali Rohár <pali.rohar@gmail.com> + * + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#include <endian.h> +#include <stdint.h> + +#define A2DP_CODEC_SBC 0x00 +#define A2DP_CODEC_MPEG12 0x01 +#define A2DP_CODEC_MPEG24 0x02 +#define A2DP_CODEC_ATRAC 0x04 +#define A2DP_CODEC_VENDOR 0xFF + +#define SBC_SAMPLING_FREQ_16000 (1 << 3) +#define SBC_SAMPLING_FREQ_32000 (1 << 2) +#define SBC_SAMPLING_FREQ_44100 (1 << 1) +#define SBC_SAMPLING_FREQ_48000 1 + +#define SBC_CHANNEL_MODE_MONO (1 << 3) +#define SBC_CHANNEL_MODE_DUAL_CHANNEL (1 << 2) +#define SBC_CHANNEL_MODE_STEREO (1 << 1) +#define SBC_CHANNEL_MODE_JOINT_STEREO 1 + +#define SBC_BLOCK_LENGTH_4 (1 << 3) +#define SBC_BLOCK_LENGTH_8 (1 << 2) +#define SBC_BLOCK_LENGTH_12 (1 << 1) +#define SBC_BLOCK_LENGTH_16 1 + +#define SBC_SUBBANDS_4 (1 << 1) +#define SBC_SUBBANDS_8 1 + +#define SBC_ALLOCATION_SNR (1 << 1) +#define SBC_ALLOCATION_LOUDNESS 1 + +#define SBC_MIN_BITPOOL 2 +#define SBC_MAX_BITPOOL 250 + +/* Other settings: + * Block length = 16 + * Allocation method = Loudness + * Subbands = 8 + */ +#define SBC_BITPOOL_MQ_MONO_44100 19 +#define SBC_BITPOOL_MQ_MONO_48000 18 +#define SBC_BITPOOL_MQ_JOINT_STEREO_44100 35 +#define SBC_BITPOOL_MQ_JOINT_STEREO_48000 33 +#define SBC_BITPOOL_HQ_MONO_44100 31 +#define SBC_BITPOOL_HQ_MONO_48000 29 +#define SBC_BITPOOL_HQ_JOINT_STEREO_44100 53 +#define SBC_BITPOOL_HQ_JOINT_STEREO_48000 51 + +#define MPEG_CHANNEL_MODE_MONO (1 << 3) +#define MPEG_CHANNEL_MODE_DUAL_CHANNEL (1 << 2) +#define MPEG_CHANNEL_MODE_STEREO (1 << 1) +#define MPEG_CHANNEL_MODE_JOINT_STEREO 1 + +#define MPEG_LAYER_MP1 (1 << 2) +#define MPEG_LAYER_MP2 (1 << 1) +#define MPEG_LAYER_MP3 1 + +#define MPEG_SAMPLING_FREQ_16000 (1 << 5) +#define MPEG_SAMPLING_FREQ_22050 (1 << 4) +#define MPEG_SAMPLING_FREQ_24000 (1 << 3) +#define MPEG_SAMPLING_FREQ_32000 (1 << 2) +#define MPEG_SAMPLING_FREQ_44100 (1 << 1) +#define MPEG_SAMPLING_FREQ_48000 1 + +#define MPEG_BIT_RATE_INDEX_0 (1 << 0) +#define MPEG_BIT_RATE_INDEX_1 (1 << 1) +#define MPEG_BIT_RATE_INDEX_2 (1 << 2) +#define MPEG_BIT_RATE_INDEX_3 (1 << 3) +#define MPEG_BIT_RATE_INDEX_4 (1 << 4) +#define MPEG_BIT_RATE_INDEX_5 (1 << 5) +#define MPEG_BIT_RATE_INDEX_6 (1 << 6) +#define MPEG_BIT_RATE_INDEX_7 (1 << 7) +#define MPEG_BIT_RATE_INDEX_8 (1 << 8) +#define MPEG_BIT_RATE_INDEX_9 (1 << 9) +#define MPEG_BIT_RATE_INDEX_10 (1 << 10) +#define MPEG_BIT_RATE_INDEX_11 (1 << 11) +#define MPEG_BIT_RATE_INDEX_12 (1 << 12) +#define MPEG_BIT_RATE_INDEX_13 (1 << 13) +#define MPEG_BIT_RATE_INDEX_14 (1 << 14) + +#define MPEG_MP1_BIT_RATE_32000 MPEG_BIT_RATE_INDEX_1 +#define MPEG_MP1_BIT_RATE_64000 MPEG_BIT_RATE_INDEX_2 +#define MPEG_MP1_BIT_RATE_96000 MPEG_BIT_RATE_INDEX_3 +#define MPEG_MP1_BIT_RATE_128000 MPEG_BIT_RATE_INDEX_4 +#define MPEG_MP1_BIT_RATE_160000 MPEG_BIT_RATE_INDEX_5 +#define MPEG_MP1_BIT_RATE_192000 MPEG_BIT_RATE_INDEX_6 +#define MPEG_MP1_BIT_RATE_224000 MPEG_BIT_RATE_INDEX_7 +#define MPEG_MP1_BIT_RATE_256000 MPEG_BIT_RATE_INDEX_8 +#define MPEG_MP1_BIT_RATE_288000 MPEG_BIT_RATE_INDEX_9 +#define MPEG_MP1_BIT_RATE_320000 MPEG_BIT_RATE_INDEX_10 +#define MPEG_MP1_BIT_RATE_352000 MPEG_BIT_RATE_INDEX_11 +#define MPEG_MP1_BIT_RATE_384000 MPEG_BIT_RATE_INDEX_12 +#define MPEG_MP1_BIT_RATE_416000 MPEG_BIT_RATE_INDEX_13 +#define MPEG_MP1_BIT_RATE_448000 MPEG_BIT_RATE_INDEX_14 + +#define MPEG_MP2_BIT_RATE_32000 MPEG_BIT_RATE_INDEX_1 +#define MPEG_MP2_BIT_RATE_48000 MPEG_BIT_RATE_INDEX_2 +#define MPEG_MP2_BIT_RATE_56000 MPEG_BIT_RATE_INDEX_3 +#define MPEG_MP2_BIT_RATE_64000 MPEG_BIT_RATE_INDEX_4 +#define MPEG_MP2_BIT_RATE_80000 MPEG_BIT_RATE_INDEX_5 +#define MPEG_MP2_BIT_RATE_96000 MPEG_BIT_RATE_INDEX_6 +#define MPEG_MP2_BIT_RATE_112000 MPEG_BIT_RATE_INDEX_7 +#define MPEG_MP2_BIT_RATE_128000 MPEG_BIT_RATE_INDEX_8 +#define MPEG_MP2_BIT_RATE_160000 MPEG_BIT_RATE_INDEX_9 +#define MPEG_MP2_BIT_RATE_192000 MPEG_BIT_RATE_INDEX_10 +#define MPEG_MP2_BIT_RATE_224000 MPEG_BIT_RATE_INDEX_11 +#define MPEG_MP2_BIT_RATE_256000 MPEG_BIT_RATE_INDEX_12 +#define MPEG_MP2_BIT_RATE_320000 MPEG_BIT_RATE_INDEX_13 +#define MPEG_MP2_BIT_RATE_384000 MPEG_BIT_RATE_INDEX_14 + +#define MPEG_MP3_BIT_RATE_32000 MPEG_BIT_RATE_INDEX_1 +#define MPEG_MP3_BIT_RATE_40000 MPEG_BIT_RATE_INDEX_2 +#define MPEG_MP3_BIT_RATE_48000 MPEG_BIT_RATE_INDEX_3 +#define MPEG_MP3_BIT_RATE_56000 MPEG_BIT_RATE_INDEX_4 +#define MPEG_MP3_BIT_RATE_64000 MPEG_BIT_RATE_INDEX_5 +#define MPEG_MP3_BIT_RATE_80000 MPEG_BIT_RATE_INDEX_6 +#define MPEG_MP3_BIT_RATE_96000 MPEG_BIT_RATE_INDEX_7 +#define MPEG_MP3_BIT_RATE_112000 MPEG_BIT_RATE_INDEX_8 +#define MPEG_MP3_BIT_RATE_128000 MPEG_BIT_RATE_INDEX_9 +#define MPEG_MP3_BIT_RATE_160000 MPEG_BIT_RATE_INDEX_10 +#define MPEG_MP3_BIT_RATE_192000 MPEG_BIT_RATE_INDEX_11 +#define MPEG_MP3_BIT_RATE_224000 MPEG_BIT_RATE_INDEX_12 +#define MPEG_MP3_BIT_RATE_256000 MPEG_BIT_RATE_INDEX_13 +#define MPEG_MP3_BIT_RATE_320000 MPEG_BIT_RATE_INDEX_14 + +#define MPEG_BIT_RATE_FREE MPEG_BIT_RATE_INDEX_0 + +#define MPEG_GET_BITRATE(a) ((uint16_t)(a).bitrate1 << 8 | (a).bitrate2) +#define MPEG_SET_BITRATE(a, b) \ + do { \ + (a).bitrate1 = ((b) >> 8) & 0x7f; \ + (a).bitrate2 = (b) & 0xff; \ + } while (0) + +#define AAC_OBJECT_TYPE_MPEG2_AAC_LC 0x80 +#define AAC_OBJECT_TYPE_MPEG4_AAC_LC 0x40 +#define AAC_OBJECT_TYPE_MPEG4_AAC_LTP 0x20 +#define AAC_OBJECT_TYPE_MPEG4_AAC_SCA 0x10 + +#define AAC_SAMPLING_FREQ_8000 0x0800 +#define AAC_SAMPLING_FREQ_11025 0x0400 +#define AAC_SAMPLING_FREQ_12000 0x0200 +#define AAC_SAMPLING_FREQ_16000 0x0100 +#define AAC_SAMPLING_FREQ_22050 0x0080 +#define AAC_SAMPLING_FREQ_24000 0x0040 +#define AAC_SAMPLING_FREQ_32000 0x0020 +#define AAC_SAMPLING_FREQ_44100 0x0010 +#define AAC_SAMPLING_FREQ_48000 0x0008 +#define AAC_SAMPLING_FREQ_64000 0x0004 +#define AAC_SAMPLING_FREQ_88200 0x0002 +#define AAC_SAMPLING_FREQ_96000 0x0001 + +#define AAC_CHANNELS_1 0x02 +#define AAC_CHANNELS_2 0x01 + +#define AAC_GET_BITRATE(a) ((a).bitrate1 << 16 | \ + (a).bitrate2 << 8 | (a).bitrate3) +#define AAC_GET_FREQUENCY(a) ((a).frequency1 << 4 | (a).frequency2) + +#define AAC_SET_BITRATE(a, b) \ + do { \ + (a).bitrate1 = (b >> 16) & 0x7f; \ + (a).bitrate2 = (b >> 8) & 0xff; \ + (a).bitrate3 = b & 0xff; \ + } while (0) +#define AAC_SET_FREQUENCY(a, f) \ + do { \ + (a).frequency1 = (f >> 4) & 0xff; \ + (a).frequency2 = f & 0x0f; \ + } while (0) + +#define AAC_INIT_BITRATE(b) \ + .bitrate1 = (b >> 16) & 0x7f, \ + .bitrate2 = (b >> 8) & 0xff, \ + .bitrate3 = b & 0xff, +#define AAC_INIT_FREQUENCY(f) \ + .frequency1 = (f >> 4) & 0xff, \ + .frequency2 = f & 0x0f, + +#define APTX_VENDOR_ID 0x0000004f +#define APTX_CODEC_ID 0x0001 + +#define APTX_CHANNEL_MODE_MONO 0x01 +#define APTX_CHANNEL_MODE_STEREO 0x02 + +#define APTX_SAMPLING_FREQ_16000 0x08 +#define APTX_SAMPLING_FREQ_32000 0x04 +#define APTX_SAMPLING_FREQ_44100 0x02 +#define APTX_SAMPLING_FREQ_48000 0x01 + +#define FASTSTREAM_VENDOR_ID 0x0000000a +#define FASTSTREAM_CODEC_ID 0x0001 + +#define FASTSTREAM_DIRECTION_SINK 0x1 +#define FASTSTREAM_DIRECTION_SOURCE 0x2 + +#define FASTSTREAM_SINK_SAMPLING_FREQ_44100 0x2 +#define FASTSTREAM_SINK_SAMPLING_FREQ_48000 0x1 + +#define FASTSTREAM_SOURCE_SAMPLING_FREQ_16000 0x2 + +#define APTX_LL_VENDOR_ID 0x0000000a +#define APTX_LL_CODEC_ID 0x0002 + +/* Default parameters for aptX Low Latency encoder */ + +/* Target codec buffer level = 180 */ +#define APTX_LL_TARGET_LEVEL2 0xb4 +#define APTX_LL_TARGET_LEVEL1 0x00 + +/* Initial codec buffer level = 360 */ +#define APTX_LL_INITIAL_LEVEL2 0x68 +#define APTX_LL_INITIAL_LEVEL1 0x01 + +/* SRA max rate 0.005 * 10000 = 50 */ +#define APTX_LL_SRA_MAX_RATE 0x32 + +/* SRA averaging time = 1s */ +#define APTX_LL_SRA_AVG_TIME 0x01 + +/* Good working codec buffer level = 180 */ +#define APTX_LL_GOOD_WORKING_LEVEL2 0xB4 +#define APTX_LL_GOOD_WORKING_LEVEL1 0x00 + +#define APTX_HD_VENDOR_ID 0x000000D7 +#define APTX_HD_CODEC_ID 0x0024 + +#define LDAC_VENDOR_ID 0x0000012d +#define LDAC_CODEC_ID 0x00aa + +#define LDAC_SAMPLING_FREQ_44100 0x20 +#define LDAC_SAMPLING_FREQ_48000 0x10 +#define LDAC_SAMPLING_FREQ_88200 0x08 +#define LDAC_SAMPLING_FREQ_96000 0x04 +#define LDAC_SAMPLING_FREQ_176400 0x02 +#define LDAC_SAMPLING_FREQ_192000 0x01 + +#define LDAC_CHANNEL_MODE_MONO 0x04 +#define LDAC_CHANNEL_MODE_DUAL 0x02 +#define LDAC_CHANNEL_MODE_STEREO 0x01 + +typedef struct { + uint8_t vendor_id4; + uint8_t vendor_id3; + uint8_t vendor_id2; + uint8_t vendor_id1; + uint8_t codec_id2; + uint8_t codec_id1; +} __attribute__ ((packed)) a2dp_vendor_codec_t; + +#define A2DP_GET_VENDOR_ID(a) ( \ + (((uint32_t)(a).vendor_id4) << 0) | \ + (((uint32_t)(a).vendor_id3) << 8) | \ + (((uint32_t)(a).vendor_id2) << 16) | \ + (((uint32_t)(a).vendor_id1) << 24) \ + ) +#define A2DP_GET_CODEC_ID(a) ((a).codec_id2 | (((uint16_t)(a).codec_id1) << 8)) +#define A2DP_SET_VENDOR_ID_CODEC_ID(v, c) ((a2dp_vendor_codec_t){ \ + .vendor_id4 = (((v) >> 0) & 0xff), \ + .vendor_id3 = (((v) >> 8) & 0xff), \ + .vendor_id2 = (((v) >> 16) & 0xff), \ + .vendor_id1 = (((v) >> 24) & 0xff), \ + .codec_id2 = (((c) >> 0) & 0xff), \ + .codec_id1 = (((c) >> 8) & 0xff), \ + }) + +typedef struct { + uint8_t reserved; + uint8_t target_level2; + uint8_t target_level1; + uint8_t initial_level2; + uint8_t initial_level1; + uint8_t sra_max_rate; + uint8_t sra_avg_time; + uint8_t good_working_level2; + uint8_t good_working_level1; +} __attribute__ ((packed)) a2dp_aptx_ll_new_caps_t; + +typedef struct { + a2dp_vendor_codec_t info; + uint8_t frequency; + uint8_t channel_mode; +} __attribute__ ((packed)) a2dp_ldac_t; + +#if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && \ + __BYTE_ORDER == __LITTLE_ENDIAN + +typedef struct { + uint8_t channel_mode:4; + uint8_t frequency:4; + uint8_t allocation_method:2; + uint8_t subbands:2; + uint8_t block_length:4; + uint8_t min_bitpool; + uint8_t max_bitpool; +} __attribute__ ((packed)) a2dp_sbc_t; + +typedef struct { + uint8_t channel_mode:4; + uint8_t crc:1; + uint8_t layer:3; + uint8_t frequency:6; + uint8_t mpf:1; + uint8_t rfa:1; + uint8_t bitrate1:7; + uint8_t vbr:1; + uint8_t bitrate2; +} __attribute__ ((packed)) a2dp_mpeg_t; + +typedef struct { + uint8_t object_type; + uint8_t frequency1; + uint8_t rfa:2; + uint8_t channels:2; + uint8_t frequency2:4; + uint8_t bitrate1:7; + uint8_t vbr:1; + uint8_t bitrate2; + uint8_t bitrate3; +} __attribute__ ((packed)) a2dp_aac_t; + +typedef struct { + a2dp_vendor_codec_t info; + uint8_t channel_mode:4; + uint8_t frequency:4; +} __attribute__ ((packed)) a2dp_aptx_t; + +typedef struct { + a2dp_vendor_codec_t info; + uint8_t direction; + uint8_t sink_frequency:4; + uint8_t source_frequency:4; +} __attribute__ ((packed)) a2dp_faststream_t; + +typedef struct { + a2dp_aptx_t aptx; + uint8_t bidirect_link:1; + uint8_t has_new_caps:1; + uint8_t reserved:6; + a2dp_aptx_ll_new_caps_t new_caps[0]; +} __attribute__ ((packed)) a2dp_aptx_ll_t; + +#elif defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && \ + __BYTE_ORDER == __BIG_ENDIAN + +typedef struct { + uint8_t frequency:4; + uint8_t channel_mode:4; + uint8_t block_length:4; + uint8_t subbands:2; + uint8_t allocation_method:2; + uint8_t min_bitpool; + uint8_t max_bitpool; +} __attribute__ ((packed)) a2dp_sbc_t; + +typedef struct { + uint8_t layer:3; + uint8_t crc:1; + uint8_t channel_mode:4; + uint8_t rfa:1; + uint8_t mpf:1; + uint8_t frequency:6; + uint8_t vbr:1; + uint8_t bitrate1:7; + uint8_t bitrate2; +} __attribute__ ((packed)) a2dp_mpeg_t; + +typedef struct { + uint8_t object_type; + uint8_t frequency1; + uint8_t frequency2:4; + uint8_t channels:2; + uint8_t rfa:2; + uint8_t vbr:1; + uint8_t bitrate1:7; + uint8_t bitrate2; + uint8_t bitrate3; +} __attribute__ ((packed)) a2dp_aac_t; + +typedef struct { + a2dp_vendor_codec_t info; + uint8_t frequency:4; + uint8_t channel_mode:4; +} __attribute__ ((packed)) a2dp_aptx_t; + +typedef struct { + a2dp_vendor_codec_t info; + uint8_t direction; + uint8_t source_frequency:4; + uint8_t sink_frequency:4; +} __attribute__ ((packed)) a2dp_faststream_t; + +typedef struct { + a2dp_aptx_t aptx; + uint8_t reserved:6; + uint8_t has_new_caps:1; + uint8_t bidirect_link:1; + a2dp_aptx_ll_new_caps_t new_caps[0]; +} __attribute__ ((packed)) a2dp_aptx_ll_t; + +#else +#error "Unknown byte order" +#endif + +typedef struct { + a2dp_aptx_t aptx; + uint8_t reserved0; + uint8_t reserved1; + uint8_t reserved2; + uint8_t reserved3; +} __attribute__ ((packed)) a2dp_aptx_hd_t; |