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pipewire/spa/plugins/bluez5/a2dp-codecs.h
Huang-Huang Bao 5c93f780cf a2dp: improve a2dp sink codec data flushing 
Let codec decides when rtp packet need to be sent (terminated by MTU size in most case).
LDAC encoding loop can now be terminated by reading if frame_num is written, no 'frame_count' updating is needed.
RTP payload fragmentation can now be implemented more easily based on this.
2021-03-31 11:14:58 +00:00

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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2006-2010 Nokia Corporation
* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
*
*
* 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
*
*/
#ifndef BLUEALSA_A2DPCODECS_H_
#define BLUEALSA_A2DPCODECS_H_
#include <stdint.h>
#include <stddef.h>
#include <spa/param/audio/format.h>
#include <spa/param/bluetooth/audio.h>
#include <spa/pod/pod.h>
#include <spa/pod/builder.h>
#define A2DP_CODEC_SBC 0x00
#define A2DP_CODEC_MPEG12 0x01
#define A2DP_CODEC_MPEG24 0x02
#define A2DP_CODEC_ATRAC 0x03
#define A2DP_CODEC_VENDOR 0xFF
#define A2DP_MAX_CAPS_SIZE 254
/* customized 16-bit vendor extension */
#define A2DP_CODEC_VENDOR_APTX 0x4FFF
#define A2DP_CODEC_VENDOR_LDAC 0x2DFF
#define SBC_SAMPLING_FREQ_48000 (1 << 0)
#define SBC_SAMPLING_FREQ_44100 (1 << 1)
#define SBC_SAMPLING_FREQ_32000 (1 << 2)
#define SBC_SAMPLING_FREQ_16000 (1 << 3)
#define SBC_CHANNEL_MODE_JOINT_STEREO (1 << 0)
#define SBC_CHANNEL_MODE_STEREO (1 << 1)
#define SBC_CHANNEL_MODE_DUAL_CHANNEL (1 << 2)
#define SBC_CHANNEL_MODE_MONO (1 << 3)
#define SBC_BLOCK_LENGTH_16 (1 << 0)
#define SBC_BLOCK_LENGTH_12 (1 << 1)
#define SBC_BLOCK_LENGTH_8 (1 << 2)
#define SBC_BLOCK_LENGTH_4 (1 << 3)
#define SBC_SUBBANDS_8 (1 << 0)
#define SBC_SUBBANDS_4 (1 << 1)
#define SBC_ALLOCATION_LOUDNESS (1 << 0)
#define SBC_ALLOCATION_SNR (1 << 1)
#define SBC_MIN_BITPOOL 2
#define SBC_MAX_BITPOOL 64
#define MPEG_CHANNEL_MODE_JOINT_STEREO (1 << 0)
#define MPEG_CHANNEL_MODE_STEREO (1 << 1)
#define MPEG_CHANNEL_MODE_DUAL_CHANNEL (1 << 2)
#define MPEG_CHANNEL_MODE_MONO (1 << 3)
#define MPEG_LAYER_MP3 (1 << 0)
#define MPEG_LAYER_MP2 (1 << 1)
#define MPEG_LAYER_MP1 (1 << 2)
#define MPEG_SAMPLING_FREQ_48000 (1 << 0)
#define MPEG_SAMPLING_FREQ_44100 (1 << 1)
#define MPEG_SAMPLING_FREQ_32000 (1 << 2)
#define MPEG_SAMPLING_FREQ_24000 (1 << 3)
#define MPEG_SAMPLING_FREQ_22050 (1 << 4)
#define MPEG_SAMPLING_FREQ_16000 (1 << 5)
#define MPEG_BIT_RATE_VBR 0x8000
#define MPEG_BIT_RATE_320000 0x4000
#define MPEG_BIT_RATE_256000 0x2000
#define MPEG_BIT_RATE_224000 0x1000
#define MPEG_BIT_RATE_192000 0x0800
#define MPEG_BIT_RATE_160000 0x0400
#define MPEG_BIT_RATE_128000 0x0200
#define MPEG_BIT_RATE_112000 0x0100
#define MPEG_BIT_RATE_96000 0x0080
#define MPEG_BIT_RATE_80000 0x0040
#define MPEG_BIT_RATE_64000 0x0020
#define MPEG_BIT_RATE_56000 0x0010
#define MPEG_BIT_RATE_48000 0x0008
#define MPEG_BIT_RATE_40000 0x0004
#define MPEG_BIT_RATE_32000 0x0002
#define MPEG_BIT_RATE_FREE 0x0001
#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 APTX_HD_VENDOR_ID 0x000000D7
#define APTX_HD_CODEC_ID 0x0024
#define APTX_HD_CHANNEL_MODE_MONO 0x1
#define APTX_HD_CHANNEL_MODE_STEREO 0x2
#define APTX_HD_SAMPLING_FREQ_16000 0x8
#define APTX_HD_SAMPLING_FREQ_32000 0x4
#define APTX_HD_SAMPLING_FREQ_44100 0x2
#define APTX_HD_SAMPLING_FREQ_48000 0x1
#define LDAC_VENDOR_ID 0x0000012d
#define LDAC_CODEC_ID 0x00aa
#define LDAC_CHANNEL_MODE_MONO 0x04
#define LDAC_CHANNEL_MODE_DUAL_CHANNEL 0x02
#define LDAC_CHANNEL_MODE_STEREO 0x01
#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
typedef struct {
uint32_t vendor_id;
uint16_t codec_id;
} __attribute__ ((packed)) a2dp_vendor_codec_t;
typedef struct {
a2dp_vendor_codec_t info;
uint8_t frequency;
uint8_t channel_mode;
} __attribute__ ((packed)) a2dp_ldac_t;
#if __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;
uint16_t bitrate;
} __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 channel_mode:4;
uint8_t frequency:4;
uint32_t rfa;
} __attribute__ ((packed)) a2dp_aptx_hd_t;
#elif __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;
uint16_t bitrate;
} __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 frequency:4;
uint8_t channel_mode:4;
uint32_t rfa;
} __attribute__ ((packed)) a2dp_aptx_hd_t;
#else
#error "Unknown byte order"
#endif
static inline int a2dp_sbc_get_channels(a2dp_sbc_t *config)
{
switch (config->channel_mode) {
case SBC_CHANNEL_MODE_MONO:
return 1;
case SBC_CHANNEL_MODE_DUAL_CHANNEL:
case SBC_CHANNEL_MODE_STEREO:
case SBC_CHANNEL_MODE_JOINT_STEREO:
return 2;
default:
return -1;
}
}
static inline int a2dp_sbc_get_frequency(a2dp_sbc_t *config)
{
switch (config->frequency) {
case SBC_SAMPLING_FREQ_16000:
return 16000;
case SBC_SAMPLING_FREQ_32000:
return 32000;
case SBC_SAMPLING_FREQ_44100:
return 44100;
case SBC_SAMPLING_FREQ_48000:
return 48000;
default:
return -1;
}
}
struct a2dp_codec_handle;
struct a2dp_codec {
enum spa_bluetooth_audio_codec id;
uint8_t codec_id;
a2dp_vendor_codec_t vendor;
const char *name;
const char *description;
const struct spa_dict *info;
const size_t send_buf_size;
const char *feature_flag;
int (*fill_caps) (const struct a2dp_codec *codec, uint32_t flags,
uint8_t caps[A2DP_MAX_CAPS_SIZE]);
int (*select_config) (const struct a2dp_codec *codec, uint32_t flags,
const void *caps, size_t caps_size,
const struct spa_dict *settings, uint8_t config[A2DP_MAX_CAPS_SIZE]);
int (*enum_config) (const struct a2dp_codec *codec,
const void *caps, size_t caps_size, uint32_t id, uint32_t idx,
struct spa_pod_builder *builder, struct spa_pod **param);
int (*validate_config) (const struct a2dp_codec *codec, uint32_t flags,
const void *caps, size_t caps_size,
struct spa_audio_info *info);
/** qsort comparison sorting caps in order of preference for the codec.
* Used in codec switching to select best remote endpoints.
* The caps handed in correspond to this codec_id, but are
* otherwise not checked beforehand.
*/
int (*caps_preference_cmp) (const struct a2dp_codec *codec, const void *caps1, size_t caps1_size,
const void *caps2, size_t caps2_size);
void *(*init_props) (const struct a2dp_codec *codec, const struct spa_dict *settings);
void (*clear_props) (void *);
int (*enum_props) (void *props, const struct spa_dict *settings, uint32_t id, uint32_t idx,
struct spa_pod_builder *builder, struct spa_pod **param);
int (*set_props) (void *props, const struct spa_pod *param);
void *(*init) (const struct a2dp_codec *codec, uint32_t flags, void *config, size_t config_size,
const struct spa_audio_info *info, void *props, size_t mtu);
void (*deinit) (void *data);
int (*update_props) (void *data, void *props);
int (*get_block_size) (void *data);
int (*abr_process) (void *data, size_t unsent);
int (*start_encode) (void *data,
void *dst, size_t dst_size, uint16_t seqnum, uint32_t timestamp);
int (*encode) (void *data,
const void *src, size_t src_size,
void *dst, size_t dst_size,
size_t *dst_out, int *need_flush);
int (*start_decode) (void *data,
const void *src, size_t src_size, uint16_t *seqnum, uint32_t *timestamp);
int (*decode) (void *data,
const void *src, size_t src_size,
void *dst, size_t dst_size,
size_t *dst_out);
int (*reduce_bitpool) (void *data);
int (*increase_bitpool) (void *data);
};
extern const struct a2dp_codec **a2dp_codecs;
bool a2dp_codec_check_caps(const struct a2dp_codec *codec, unsigned int codec_id, const void *caps, size_t caps_size);
#endif
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