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android / platform / system / bt / 3a3ec66a1bb7f5c99b17239021d6d184a3abd4ee / . / stack / a2dp / a2dp_sbc.cc
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/******************************************************************************
*
* Copyright (C) 2002-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* Utility functions to help build and parse SBC Codec Information Element
* and Media Payload.
*
******************************************************************************/
#define LOG_TAG "a2dp_sbc"
#include "bt_target.h"
#include "a2dp_sbc.h"
#include <string.h>
#include <base/logging.h>
#include "a2dp_int.h"
#include "a2dp_sbc_encoder.h"
#include "bt_utils.h"
#include "embdrv/sbc/encoder/include/sbc_encoder.h"
#include "osi/include/log.h"
#include "osi/include/osi.h"
#define A2DP_SBC_MAX_BITPOOL 53
/* data type for the SBC Codec Information Element */
typedef struct {
uint8_t samp_freq; /* Sampling frequency */
uint8_t ch_mode; /* Channel mode */
uint8_t block_len; /* Block length */
uint8_t num_subbands; /* Number of subbands */
uint8_t alloc_method; /* Allocation method */
uint8_t min_bitpool; /* Minimum bitpool */
uint8_t max_bitpool; /* Maximum bitpool */
} tA2DP_SBC_CIE;
/* SBC SRC codec capabilities */
static const tA2DP_SBC_CIE a2dp_sbc_caps = {
A2DP_SBC_IE_SAMP_FREQ_44, /* samp_freq */
A2DP_SBC_IE_CH_MD_JOINT, /* ch_mode */
A2DP_SBC_IE_BLOCKS_16, /* block_len */
A2DP_SBC_IE_SUBBAND_8, /* num_subbands */
A2DP_SBC_IE_ALLOC_MD_L, /* alloc_method */
A2DP_SBC_IE_MIN_BITPOOL, /* min_bitpool */
A2DP_SBC_MAX_BITPOOL /* max_bitpool */
};
/* SBC SINK codec capabilities */
static const tA2DP_SBC_CIE a2dp_sbc_sink_caps = {
(A2DP_SBC_IE_SAMP_FREQ_48 | A2DP_SBC_IE_SAMP_FREQ_44), /* samp_freq */
(A2DP_SBC_IE_CH_MD_MONO | A2DP_SBC_IE_CH_MD_STEREO |
A2DP_SBC_IE_CH_MD_JOINT | A2DP_SBC_IE_CH_MD_DUAL), /* ch_mode */
(A2DP_SBC_IE_BLOCKS_16 | A2DP_SBC_IE_BLOCKS_12 | A2DP_SBC_IE_BLOCKS_8 |
A2DP_SBC_IE_BLOCKS_4), /* block_len */
(A2DP_SBC_IE_SUBBAND_4 | A2DP_SBC_IE_SUBBAND_8), /* num_subbands */
(A2DP_SBC_IE_ALLOC_MD_L | A2DP_SBC_IE_ALLOC_MD_S), /* alloc_method */
A2DP_SBC_IE_MIN_BITPOOL, /* min_bitpool */
A2DP_SBC_MAX_BITPOOL /* max_bitpool */
};
/* Default SBC codec configuration */
const tA2DP_SBC_CIE a2dp_sbc_default_config = {
A2DP_SBC_IE_SAMP_FREQ_44, /* samp_freq */
A2DP_SBC_IE_CH_MD_JOINT, /* ch_mode */
A2DP_SBC_IE_BLOCKS_16, /* block_len */
A2DP_SBC_IE_SUBBAND_8, /* num_subbands */
A2DP_SBC_IE_ALLOC_MD_L, /* alloc_method */
A2DP_SBC_IE_MIN_BITPOOL, /* min_bitpool */
A2DP_SBC_MAX_BITPOOL /* max_bitpool */
};
static const tA2DP_ENCODER_INTERFACE a2dp_encoder_interface_sbc = {
a2dp_sbc_encoder_init, a2dp_sbc_encoder_cleanup,
a2dp_sbc_feeding_init, a2dp_sbc_feeding_reset,
a2dp_sbc_feeding_flush, a2dp_sbc_get_encoder_interval_ms,
a2dp_sbc_send_frames, a2dp_sbc_debug_codec_dump};
static tA2DP_STATUS A2DP_CodecInfoMatchesCapabilitySbc(
const tA2DP_SBC_CIE* p_cap, const uint8_t* p_codec_info,
bool is_capability);
static void A2DP_ParseMplHeaderSbc(uint8_t* p_src, bool* p_frag, bool* p_start,
bool* p_last, uint8_t* p_num);
// Builds the SBC Media Codec Capabilities byte sequence beginning from the
// LOSC octet. |media_type| is the media type |AVDT_MEDIA_TYPE_*|.
// |p_ie| is a pointer to the SBC Codec Information Element information.
// The result is stored in |p_result|. Returns A2DP_SUCCESS on success,
// otherwise the corresponding A2DP error status code.
static tA2DP_STATUS A2DP_BuildInfoSbc(uint8_t media_type,
const tA2DP_SBC_CIE* p_ie,
uint8_t* p_result) {
tA2DP_STATUS status;
if (p_ie == NULL || p_result == NULL ||
(p_ie->samp_freq & ~A2DP_SBC_IE_SAMP_FREQ_MSK) ||
(p_ie->ch_mode & ~A2DP_SBC_IE_CH_MD_MSK) ||
(p_ie->block_len & ~A2DP_SBC_IE_BLOCKS_MSK) ||
(p_ie->num_subbands & ~A2DP_SBC_IE_SUBBAND_MSK) ||
(p_ie->alloc_method & ~A2DP_SBC_IE_ALLOC_MD_MSK) ||
(p_ie->min_bitpool > p_ie->max_bitpool) ||
(p_ie->min_bitpool < A2DP_SBC_IE_MIN_BITPOOL) ||
(p_ie->min_bitpool > A2DP_SBC_IE_MAX_BITPOOL) ||
(p_ie->max_bitpool < A2DP_SBC_IE_MIN_BITPOOL) ||
(p_ie->max_bitpool > A2DP_SBC_IE_MAX_BITPOOL)) {
/* if any unused bit is set */
status = A2DP_INVALID_PARAMS;
} else {
status = A2DP_SUCCESS;
*p_result++ = A2DP_SBC_INFO_LEN;
*p_result++ = (media_type << 4);
*p_result++ = A2DP_MEDIA_CT_SBC;
/* Media Codec Specific Information Element */
*p_result++ = p_ie->samp_freq | p_ie->ch_mode;
*p_result++ = p_ie->block_len | p_ie->num_subbands | p_ie->alloc_method;
*p_result++ = p_ie->min_bitpool;
*p_result = p_ie->max_bitpool;
}
return status;
}
// Parses the SBC Media Codec Capabilities byte sequence beginning from the
// LOSC octet. The result is stored in |p_ie|. The byte sequence to parse is
// |p_codec_info|. If |is_capability| is true, the byte sequence contains
// codec capability.
// Returns A2DP_SUCCESS on success, otherwise the corresponding A2DP error
// status code.
static tA2DP_STATUS A2DP_ParseInfoSbc(tA2DP_SBC_CIE* p_ie,
const uint8_t* p_codec_info,
bool is_capability) {
tA2DP_STATUS status = A2DP_SUCCESS;
uint8_t losc;
uint8_t media_type;
tA2DP_CODEC_TYPE codec_type;
if (p_ie == NULL || p_codec_info == NULL) return A2DP_INVALID_PARAMS;
// Check the codec capability length
losc = *p_codec_info++;
if (losc != A2DP_SBC_INFO_LEN) return A2DP_WRONG_CODEC;
media_type = (*p_codec_info++) >> 4;
codec_type = *p_codec_info++;
/* Check the Media Type and Media Codec Type */
if (media_type != AVDT_MEDIA_TYPE_AUDIO || codec_type != A2DP_MEDIA_CT_SBC) {
return A2DP_WRONG_CODEC;
}
p_ie->samp_freq = *p_codec_info & A2DP_SBC_IE_SAMP_FREQ_MSK;
p_ie->ch_mode = *p_codec_info & A2DP_SBC_IE_CH_MD_MSK;
p_codec_info++;
p_ie->block_len = *p_codec_info & A2DP_SBC_IE_BLOCKS_MSK;
p_ie->num_subbands = *p_codec_info & A2DP_SBC_IE_SUBBAND_MSK;
p_ie->alloc_method = *p_codec_info & A2DP_SBC_IE_ALLOC_MD_MSK;
p_codec_info++;
p_ie->min_bitpool = *p_codec_info++;
p_ie->max_bitpool = *p_codec_info;
if (p_ie->min_bitpool < A2DP_SBC_IE_MIN_BITPOOL ||
p_ie->min_bitpool > A2DP_SBC_IE_MAX_BITPOOL) {
status = A2DP_BAD_MIN_BITPOOL;
}
if (p_ie->max_bitpool < A2DP_SBC_IE_MIN_BITPOOL ||
p_ie->max_bitpool > A2DP_SBC_IE_MAX_BITPOOL ||
p_ie->max_bitpool < p_ie->min_bitpool) {
status = A2DP_BAD_MAX_BITPOOL;
}
if (is_capability) return status;
if (A2DP_BitsSet(p_ie->samp_freq) != A2DP_SET_ONE_BIT)
status = A2DP_BAD_SAMP_FREQ;
if (A2DP_BitsSet(p_ie->ch_mode) != A2DP_SET_ONE_BIT)
status = A2DP_BAD_CH_MODE;
if (A2DP_BitsSet(p_ie->block_len) != A2DP_SET_ONE_BIT)
status = A2DP_BAD_BLOCK_LEN;
if (A2DP_BitsSet(p_ie->num_subbands) != A2DP_SET_ONE_BIT)
status = A2DP_BAD_SUBBANDS;
if (A2DP_BitsSet(p_ie->alloc_method) != A2DP_SET_ONE_BIT)
status = A2DP_BAD_ALLOC_METHOD;
return status;
}
// Build the SBC Media Payload Header.
// |p_dst| points to the location where the header should be written to.
// If |frag| is true, the media payload frame is fragmented.
// |start| is true for the first packet of a fragmented frame.
// |last| is true for the last packet of a fragmented frame.
// If |frag| is false, |num| is the number of number of frames in the packet,
// otherwise is the number of remaining fragments (including this one).
static void A2DP_BuildMediaPayloadHeaderSbc(uint8_t* p_dst, bool frag,
bool start, bool last,
uint8_t num) {
if (p_dst == NULL) return;
*p_dst = 0;
if (frag) *p_dst |= A2DP_SBC_HDR_F_MSK;
if (start) *p_dst |= A2DP_SBC_HDR_S_MSK;
if (last) *p_dst |= A2DP_SBC_HDR_L_MSK;
*p_dst |= (A2DP_SBC_HDR_NUM_MSK & num);
}
/******************************************************************************
*
* Function A2DP_ParseMplHeaderSbc
*
* Description This function is called by an application to parse
* the SBC Media Payload header.
* Input Parameters:
* p_src: the byte sequence to parse..
*
* Output Parameters:
* frag: 1, if fragmented. 0, otherwise.
*
* start: 1, if the starting packet of a fragmented frame.
*
* last: 1, if the last packet of a fragmented frame.
*
* num: If frag is 1, this is the number of remaining
* fragments
* (including this fragment) of this frame.
* If frag is 0, this is the number of frames in
* this packet.
*
* Returns void.
*****************************************************************************/
UNUSED_ATTR static void A2DP_ParseMplHeaderSbc(uint8_t* p_src, bool* p_frag,
bool* p_start, bool* p_last,
uint8_t* p_num) {
if (p_src && p_frag && p_start && p_last && p_num) {
*p_frag = (*p_src & A2DP_SBC_HDR_F_MSK) ? true : false;
*p_start = (*p_src & A2DP_SBC_HDR_S_MSK) ? true : false;
*p_last = (*p_src & A2DP_SBC_HDR_L_MSK) ? true : false;
*p_num = (*p_src & A2DP_SBC_HDR_NUM_MSK);
}
}
const char* A2DP_CodecNameSbc(UNUSED_ATTR const uint8_t* p_codec_info) {
return "SBC";
}
bool A2DP_IsSourceCodecValidSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE cfg_cie;
/* Use a liberal check when parsing the codec info */
return (A2DP_ParseInfoSbc(&cfg_cie, p_codec_info, false) == A2DP_SUCCESS) ||
(A2DP_ParseInfoSbc(&cfg_cie, p_codec_info, true) == A2DP_SUCCESS);
}
bool A2DP_IsSinkCodecValidSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE cfg_cie;
/* Use a liberal check when parsing the codec info */
return (A2DP_ParseInfoSbc(&cfg_cie, p_codec_info, false) == A2DP_SUCCESS) ||
(A2DP_ParseInfoSbc(&cfg_cie, p_codec_info, true) == A2DP_SUCCESS);
}
bool A2DP_IsPeerSourceCodecValidSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE cfg_cie;
/* Use a liberal check when parsing the codec info */
return (A2DP_ParseInfoSbc(&cfg_cie, p_codec_info, false) == A2DP_SUCCESS) ||
(A2DP_ParseInfoSbc(&cfg_cie, p_codec_info, true) == A2DP_SUCCESS);
}
bool A2DP_IsPeerSinkCodecValidSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE cfg_cie;
/* Use a liberal check when parsing the codec info */
return (A2DP_ParseInfoSbc(&cfg_cie, p_codec_info, false) == A2DP_SUCCESS) ||
(A2DP_ParseInfoSbc(&cfg_cie, p_codec_info, true) == A2DP_SUCCESS);
}
bool A2DP_IsSinkCodecSupportedSbc(const uint8_t* p_codec_info) {
return (A2DP_CodecInfoMatchesCapabilitySbc(&a2dp_sbc_sink_caps, p_codec_info,
false) == A2DP_SUCCESS);
}
bool A2DP_IsPeerSourceCodecSupportedSbc(const uint8_t* p_codec_info) {
return (A2DP_CodecInfoMatchesCapabilitySbc(&a2dp_sbc_sink_caps, p_codec_info,
true) == A2DP_SUCCESS);
}
void A2DP_InitDefaultCodecSbc(uint8_t* p_codec_info) {
if (A2DP_BuildInfoSbc(AVDT_MEDIA_TYPE_AUDIO, &a2dp_sbc_default_config,
p_codec_info) != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: A2DP_BuildInfoSbc failed", __func__);
}
}
// Checks whether A2DP SBC codec configuration matches with a device's codec
// capabilities. |p_cap| is the SBC codec configuration. |p_codec_info| is
// the device's codec capabilities. |is_capability| is true if
// |p_codec_info| contains A2DP codec capability.
// Returns A2DP_SUCCESS if the codec configuration matches with capabilities,
// otherwise the corresponding A2DP error status code.
static tA2DP_STATUS A2DP_CodecInfoMatchesCapabilitySbc(
const tA2DP_SBC_CIE* p_cap, const uint8_t* p_codec_info,
bool is_capability) {
tA2DP_STATUS status;
tA2DP_SBC_CIE cfg_cie;
/* parse configuration */
status = A2DP_ParseInfoSbc(&cfg_cie, p_codec_info, is_capability);
if (status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: parsing failed %d", __func__, status);
return status;
}
/* verify that each parameter is in range */
LOG_DEBUG(LOG_TAG, "FREQ peer: 0x%x, capability 0x%x", cfg_cie.samp_freq,
p_cap->samp_freq);
LOG_DEBUG(LOG_TAG, "CH_MODE peer: 0x%x, capability 0x%x", cfg_cie.ch_mode,
p_cap->ch_mode);
LOG_DEBUG(LOG_TAG, "BLOCK_LEN peer: 0x%x, capability 0x%x", cfg_cie.block_len,
p_cap->block_len);
LOG_DEBUG(LOG_TAG, "SUB_BAND peer: 0x%x, capability 0x%x",
cfg_cie.num_subbands, p_cap->num_subbands);
LOG_DEBUG(LOG_TAG, "ALLOC_METHOD peer: 0x%x, capability 0x%x",
cfg_cie.alloc_method, p_cap->alloc_method);
LOG_DEBUG(LOG_TAG, "MIN_BitPool peer: 0x%x, capability 0x%x",
cfg_cie.min_bitpool, p_cap->min_bitpool);
LOG_DEBUG(LOG_TAG, "MAX_BitPool peer: 0x%x, capability 0x%x",
cfg_cie.max_bitpool, p_cap->max_bitpool);
/* sampling frequency */
if ((cfg_cie.samp_freq & p_cap->samp_freq) == 0) return A2DP_NS_SAMP_FREQ;
/* channel mode */
if ((cfg_cie.ch_mode & p_cap->ch_mode) == 0) return A2DP_NS_CH_MODE;
/* block length */
if ((cfg_cie.block_len & p_cap->block_len) == 0) return A2DP_BAD_BLOCK_LEN;
/* subbands */
if ((cfg_cie.num_subbands & p_cap->num_subbands) == 0)
return A2DP_NS_SUBBANDS;
/* allocation method */
if ((cfg_cie.alloc_method & p_cap->alloc_method) == 0)
return A2DP_NS_ALLOC_METHOD;
/* min bitpool */
if (cfg_cie.min_bitpool > p_cap->max_bitpool) return A2DP_NS_MIN_BITPOOL;
/* max bitpool */
if (cfg_cie.max_bitpool < p_cap->min_bitpool) return A2DP_NS_MAX_BITPOOL;
return A2DP_SUCCESS;
}
tA2DP_STATUS A2DP_BuildSrc2SinkConfigSbc(const uint8_t* p_src_cap,
uint8_t* p_pref_cfg) {
tA2DP_SBC_CIE src_cap;
tA2DP_SBC_CIE pref_cap;
/* initialize it to default SBC configuration */
A2DP_BuildInfoSbc(AVDT_MEDIA_TYPE_AUDIO, &a2dp_sbc_default_config,
p_pref_cfg);
/* now try to build a preferred one */
/* parse configuration */
tA2DP_STATUS status = A2DP_ParseInfoSbc(&src_cap, p_src_cap, true);
if (status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: can't parse src cap ret = %d", __func__, status);
return A2DP_FAIL;
}
if (src_cap.samp_freq & A2DP_SBC_IE_SAMP_FREQ_48)
pref_cap.samp_freq = A2DP_SBC_IE_SAMP_FREQ_48;
else if (src_cap.samp_freq & A2DP_SBC_IE_SAMP_FREQ_44)
pref_cap.samp_freq = A2DP_SBC_IE_SAMP_FREQ_44;
if (src_cap.ch_mode & A2DP_SBC_IE_CH_MD_JOINT)
pref_cap.ch_mode = A2DP_SBC_IE_CH_MD_JOINT;
else if (src_cap.ch_mode & A2DP_SBC_IE_CH_MD_STEREO)
pref_cap.ch_mode = A2DP_SBC_IE_CH_MD_STEREO;
else if (src_cap.ch_mode & A2DP_SBC_IE_CH_MD_DUAL)
pref_cap.ch_mode = A2DP_SBC_IE_CH_MD_DUAL;
else if (src_cap.ch_mode & A2DP_SBC_IE_CH_MD_MONO)
pref_cap.ch_mode = A2DP_SBC_IE_CH_MD_MONO;
if (src_cap.block_len & A2DP_SBC_IE_BLOCKS_16)
pref_cap.block_len = A2DP_SBC_IE_BLOCKS_16;
else if (src_cap.block_len & A2DP_SBC_IE_BLOCKS_12)
pref_cap.block_len = A2DP_SBC_IE_BLOCKS_12;
else if (src_cap.block_len & A2DP_SBC_IE_BLOCKS_8)
pref_cap.block_len = A2DP_SBC_IE_BLOCKS_8;
else if (src_cap.block_len & A2DP_SBC_IE_BLOCKS_4)
pref_cap.block_len = A2DP_SBC_IE_BLOCKS_4;
if (src_cap.num_subbands & A2DP_SBC_IE_SUBBAND_8)
pref_cap.num_subbands = A2DP_SBC_IE_SUBBAND_8;
else if (src_cap.num_subbands & A2DP_SBC_IE_SUBBAND_4)
pref_cap.num_subbands = A2DP_SBC_IE_SUBBAND_4;
if (src_cap.alloc_method & A2DP_SBC_IE_ALLOC_MD_L)
pref_cap.alloc_method = A2DP_SBC_IE_ALLOC_MD_L;
else if (src_cap.alloc_method & A2DP_SBC_IE_ALLOC_MD_S)
pref_cap.alloc_method = A2DP_SBC_IE_ALLOC_MD_S;
pref_cap.min_bitpool = src_cap.min_bitpool;
pref_cap.max_bitpool = src_cap.max_bitpool;
A2DP_BuildInfoSbc(AVDT_MEDIA_TYPE_AUDIO, &pref_cap, p_pref_cfg);
return A2DP_SUCCESS;
}
bool A2DP_CodecTypeEqualsSbc(const uint8_t* p_codec_info_a,
const uint8_t* p_codec_info_b) {
tA2DP_SBC_CIE sbc_cie_a;
tA2DP_SBC_CIE sbc_cie_b;
// Check whether the codec info contains valid data
tA2DP_STATUS a2dp_status =
A2DP_ParseInfoSbc(&sbc_cie_a, p_codec_info_a, true);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return false;
}
a2dp_status = A2DP_ParseInfoSbc(&sbc_cie_b, p_codec_info_b, true);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return false;
}
tA2DP_CODEC_TYPE codec_type_a = A2DP_GetCodecType(p_codec_info_a);
tA2DP_CODEC_TYPE codec_type_b = A2DP_GetCodecType(p_codec_info_b);
return (codec_type_a == codec_type_b) && (codec_type_a == A2DP_MEDIA_CT_SBC);
}
bool A2DP_CodecEqualsSbc(const uint8_t* p_codec_info_a,
const uint8_t* p_codec_info_b) {
tA2DP_SBC_CIE sbc_cie_a;
tA2DP_SBC_CIE sbc_cie_b;
// Check whether the codec info contains valid data
tA2DP_STATUS a2dp_status =
A2DP_ParseInfoSbc(&sbc_cie_a, p_codec_info_a, true);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return false;
}
a2dp_status = A2DP_ParseInfoSbc(&sbc_cie_b, p_codec_info_b, true);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return false;
}
tA2DP_CODEC_TYPE codec_type_a = A2DP_GetCodecType(p_codec_info_a);
tA2DP_CODEC_TYPE codec_type_b = A2DP_GetCodecType(p_codec_info_b);
if ((codec_type_a != codec_type_b) || (codec_type_a != A2DP_MEDIA_CT_SBC))
return false;
return (sbc_cie_a.samp_freq == sbc_cie_b.samp_freq) &&
(sbc_cie_a.ch_mode == sbc_cie_b.ch_mode) &&
(sbc_cie_a.block_len == sbc_cie_b.block_len) &&
(sbc_cie_a.num_subbands == sbc_cie_b.num_subbands) &&
(sbc_cie_a.alloc_method == sbc_cie_b.alloc_method) &&
(sbc_cie_a.min_bitpool == sbc_cie_b.min_bitpool) &&
(sbc_cie_a.max_bitpool == sbc_cie_b.max_bitpool);
}
int A2DP_GetTrackSampleRateSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, false);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
switch (sbc_cie.samp_freq) {
case A2DP_SBC_IE_SAMP_FREQ_16:
return 16000;
case A2DP_SBC_IE_SAMP_FREQ_32:
return 32000;
case A2DP_SBC_IE_SAMP_FREQ_44:
return 44100;
case A2DP_SBC_IE_SAMP_FREQ_48:
return 48000;
default:
break;
}
return -1;
}
int A2DP_GetTrackBitsPerSampleSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, false);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
return 16; // For SBC we always use 16 bits per audio sample
}
int A2DP_GetTrackChannelCountSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, false);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
switch (sbc_cie.ch_mode) {
case A2DP_SBC_IE_CH_MD_MONO:
return 1;
case A2DP_SBC_IE_CH_MD_DUAL:
case A2DP_SBC_IE_CH_MD_STEREO:
case A2DP_SBC_IE_CH_MD_JOINT:
return 2;
default:
break;
}
return -1;
}
int A2DP_GetNumberOfSubbandsSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, false);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
switch (sbc_cie.num_subbands) {
case A2DP_SBC_IE_SUBBAND_4:
return 4;
case A2DP_SBC_IE_SUBBAND_8:
return 8;
default:
break;
}
return -1;
}
int A2DP_GetNumberOfBlocksSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, false);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
switch (sbc_cie.block_len) {
case A2DP_SBC_IE_BLOCKS_4:
return 4;
case A2DP_SBC_IE_BLOCKS_8:
return 8;
case A2DP_SBC_IE_BLOCKS_12:
return 12;
case A2DP_SBC_IE_BLOCKS_16:
return 16;
default:
break;
}
return -1;
}
int A2DP_GetAllocationMethodCodeSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, false);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
switch (sbc_cie.alloc_method) {
case A2DP_SBC_IE_ALLOC_MD_S:
return SBC_SNR;
case A2DP_SBC_IE_ALLOC_MD_L:
return SBC_LOUDNESS;
default:
break;
}
return -1;
}
int A2DP_GetChannelModeCodeSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, false);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
switch (sbc_cie.ch_mode) {
case A2DP_SBC_IE_CH_MD_MONO:
return SBC_MONO;
case A2DP_SBC_IE_CH_MD_DUAL:
return SBC_DUAL;
case A2DP_SBC_IE_CH_MD_STEREO:
return SBC_STEREO;
case A2DP_SBC_IE_CH_MD_JOINT:
return SBC_JOINT_STEREO;
default:
break;
}
return -1;
}
int A2DP_GetSamplingFrequencyCodeSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, false);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
switch (sbc_cie.samp_freq) {
case A2DP_SBC_IE_SAMP_FREQ_16:
return SBC_sf16000;
case A2DP_SBC_IE_SAMP_FREQ_32:
return SBC_sf32000;
case A2DP_SBC_IE_SAMP_FREQ_44:
return SBC_sf44100;
case A2DP_SBC_IE_SAMP_FREQ_48:
return SBC_sf48000;
default:
break;
}
return -1;
}
int A2DP_GetMinBitpoolSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, true);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
return sbc_cie.min_bitpool;
}
int A2DP_GetMaxBitpoolSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, true);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
return sbc_cie.max_bitpool;
}
int A2DP_GetSinkTrackChannelTypeSbc(const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, false);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
switch (sbc_cie.ch_mode) {
case A2DP_SBC_IE_CH_MD_MONO:
return 1;
case A2DP_SBC_IE_CH_MD_DUAL:
case A2DP_SBC_IE_CH_MD_STEREO:
case A2DP_SBC_IE_CH_MD_JOINT:
return 3;
default:
break;
}
return -1;
}
int A2DP_GetSinkFramesCountToProcessSbc(uint64_t time_interval_ms,
const uint8_t* p_codec_info) {
tA2DP_SBC_CIE sbc_cie;
uint32_t freq_multiple;
uint32_t num_blocks;
uint32_t num_subbands;
int frames_to_process;
tA2DP_STATUS a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, false);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: cannot decode codec information: %d", __func__,
a2dp_status);
return -1;
}
// Check the sample frequency
switch (sbc_cie.samp_freq) {
case A2DP_SBC_IE_SAMP_FREQ_16:
LOG_VERBOSE(LOG_TAG, "%s: samp_freq:%d (16000)", __func__,
sbc_cie.samp_freq);
freq_multiple = 16 * time_interval_ms;
break;
case A2DP_SBC_IE_SAMP_FREQ_32:
LOG_VERBOSE(LOG_TAG, "%s: samp_freq:%d (32000)", __func__,
sbc_cie.samp_freq);
freq_multiple = 32 * time_interval_ms;
break;
case A2DP_SBC_IE_SAMP_FREQ_44:
LOG_VERBOSE(LOG_TAG, "%s: samp_freq:%d (44100)", __func__,
sbc_cie.samp_freq);
freq_multiple = (441 * time_interval_ms) / 10;
break;
case A2DP_SBC_IE_SAMP_FREQ_48:
LOG_VERBOSE(LOG_TAG, "%s: samp_freq:%d (48000)", __func__,
sbc_cie.samp_freq);
freq_multiple = 48 * time_interval_ms;
break;
default:
LOG_ERROR(LOG_TAG, "%s: unknown frequency: %d", __func__,
sbc_cie.samp_freq);
return -1;
}
// Check the channel mode
switch (sbc_cie.ch_mode) {
case A2DP_SBC_IE_CH_MD_MONO:
LOG_VERBOSE(LOG_TAG, "%s: ch_mode:%d (Mono)", __func__, sbc_cie.ch_mode);
break;
case A2DP_SBC_IE_CH_MD_DUAL:
LOG_VERBOSE(LOG_TAG, "%s: ch_mode:%d (DUAL)", __func__, sbc_cie.ch_mode);
break;
case A2DP_SBC_IE_CH_MD_STEREO:
LOG_VERBOSE(LOG_TAG, "%s: ch_mode:%d (STEREO)", __func__,
sbc_cie.ch_mode);
break;
case A2DP_SBC_IE_CH_MD_JOINT:
LOG_VERBOSE(LOG_TAG, "%s: ch_mode:%d (JOINT)", __func__, sbc_cie.ch_mode);
break;
default:
LOG_ERROR(LOG_TAG, "%s: unknown channel mode: %d", __func__,
sbc_cie.ch_mode);
return -1;
}
// Check the block length
switch (sbc_cie.block_len) {
case A2DP_SBC_IE_BLOCKS_4:
LOG_VERBOSE(LOG_TAG, "%s: block_len:%d (4)", __func__, sbc_cie.block_len);
num_blocks = 4;
break;
case A2DP_SBC_IE_BLOCKS_8:
LOG_VERBOSE(LOG_TAG, "%s: block_len:%d (8)", __func__, sbc_cie.block_len);
num_blocks = 8;
break;
case A2DP_SBC_IE_BLOCKS_12:
LOG_VERBOSE(LOG_TAG, "%s: block_len:%d (12)", __func__,
sbc_cie.block_len);
num_blocks = 12;
break;
case A2DP_SBC_IE_BLOCKS_16:
LOG_VERBOSE(LOG_TAG, "%s: block_len:%d (16)", __func__,
sbc_cie.block_len);
num_blocks = 16;
break;
default:
LOG_ERROR(LOG_TAG, "%s: unknown block length: %d", __func__,
sbc_cie.block_len);
return -1;
}
// Check the number of sub-bands
switch (sbc_cie.num_subbands) {
case A2DP_SBC_IE_SUBBAND_4:
LOG_VERBOSE(LOG_TAG, "%s: num_subbands:%d (4)", __func__,
sbc_cie.num_subbands);
num_subbands = 4;
break;
case A2DP_SBC_IE_SUBBAND_8:
LOG_VERBOSE(LOG_TAG, "%s: num_subbands:%d (8)", __func__,
sbc_cie.num_subbands);
num_subbands = 8;
break;
default:
LOG_ERROR(LOG_TAG, "%s: unknown number of subbands: %d", __func__,
sbc_cie.num_subbands);
return -1;
}
// Check the allocation method
switch (sbc_cie.alloc_method) {
case A2DP_SBC_IE_ALLOC_MD_S:
LOG_VERBOSE(LOG_TAG, "%s: alloc_method:%d (SNR)", __func__,
sbc_cie.alloc_method);
break;
case A2DP_SBC_IE_ALLOC_MD_L:
LOG_VERBOSE(LOG_TAG, "%s: alloc_method:%d (Loudness)", __func__,
sbc_cie.alloc_method);
break;
default:
LOG_ERROR(LOG_TAG, "%s: unknown allocation method: %d", __func__,
sbc_cie.alloc_method);
return -1;
}
LOG_VERBOSE(LOG_TAG, "%s: Bit pool Min:%d Max:%d", __func__,
sbc_cie.min_bitpool, sbc_cie.max_bitpool);
frames_to_process = ((freq_multiple) / (num_blocks * num_subbands)) + 1;
return frames_to_process;
}
bool A2DP_GetPacketTimestampSbc(UNUSED_ATTR const uint8_t* p_codec_info,
const uint8_t* p_data, uint32_t* p_timestamp) {
*p_timestamp = *(const uint32_t*)p_data;
return true;
}
bool A2DP_BuildCodecHeaderSbc(UNUSED_ATTR const uint8_t* p_codec_info,
BT_HDR* p_buf, uint16_t frames_per_packet) {
uint8_t* p;
p_buf->offset -= A2DP_SBC_MPL_HDR_LEN;
p = (uint8_t*)(p_buf + 1) + p_buf->offset;
p_buf->len += A2DP_SBC_MPL_HDR_LEN;
A2DP_BuildMediaPayloadHeaderSbc(p, false, false, false,
(uint8_t)frames_per_packet);
return true;
}
void A2DP_DumpCodecInfoSbc(const uint8_t* p_codec_info) {
tA2DP_STATUS a2dp_status;
tA2DP_SBC_CIE sbc_cie;
LOG_DEBUG(LOG_TAG, "%s", __func__);
a2dp_status = A2DP_ParseInfoSbc(&sbc_cie, p_codec_info, true);
if (a2dp_status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: A2DP_ParseInfoSbc fail:%d", __func__, a2dp_status);
return;
}
LOG_DEBUG(LOG_TAG, "\tsamp_freq: 0x%x", sbc_cie.samp_freq);
if (sbc_cie.samp_freq & A2DP_SBC_IE_SAMP_FREQ_16) {
LOG_DEBUG(LOG_TAG, "\tsamp_freq: (16000)");
}
if (sbc_cie.samp_freq & A2DP_SBC_IE_SAMP_FREQ_32) {
LOG_DEBUG(LOG_TAG, "\tsamp_freq: (32000)");
}
if (sbc_cie.samp_freq & A2DP_SBC_IE_SAMP_FREQ_44) {
LOG_DEBUG(LOG_TAG, "\tsamp_freq: (44100)");
}
if (sbc_cie.samp_freq & A2DP_SBC_IE_SAMP_FREQ_48) {
LOG_DEBUG(LOG_TAG, "\tsamp_freq: (48000)");
}
LOG_DEBUG(LOG_TAG, "\tch_mode: 0x%x", sbc_cie.ch_mode);
if (sbc_cie.ch_mode & A2DP_SBC_IE_CH_MD_MONO) {
LOG_DEBUG(LOG_TAG, "\tch_mode: (Mono)");
}
if (sbc_cie.ch_mode & A2DP_SBC_IE_CH_MD_DUAL) {
LOG_DEBUG(LOG_TAG, "\tch_mode: (Dual)");
}
if (sbc_cie.ch_mode & A2DP_SBC_IE_CH_MD_STEREO) {
LOG_DEBUG(LOG_TAG, "\tch_mode: (Stereo)");
}
if (sbc_cie.ch_mode & A2DP_SBC_IE_CH_MD_JOINT) {
LOG_DEBUG(LOG_TAG, "\tch_mode: (Joint)");
}
LOG_DEBUG(LOG_TAG, "\tblock_len: 0x%x", sbc_cie.block_len);
if (sbc_cie.block_len & A2DP_SBC_IE_BLOCKS_4) {
LOG_DEBUG(LOG_TAG, "\tblock_len: (4)");
}
if (sbc_cie.block_len & A2DP_SBC_IE_BLOCKS_8) {
LOG_DEBUG(LOG_TAG, "\tblock_len: (8)");
}
if (sbc_cie.block_len & A2DP_SBC_IE_BLOCKS_12) {
LOG_DEBUG(LOG_TAG, "\tblock_len: (12)");
}
if (sbc_cie.block_len & A2DP_SBC_IE_BLOCKS_16) {
LOG_DEBUG(LOG_TAG, "\tblock_len: (16)");
}
LOG_DEBUG(LOG_TAG, "\tnum_subbands: 0x%x", sbc_cie.num_subbands);
if (sbc_cie.num_subbands & A2DP_SBC_IE_SUBBAND_4) {
LOG_DEBUG(LOG_TAG, "\tnum_subbands: (4)");
}
if (sbc_cie.num_subbands & A2DP_SBC_IE_SUBBAND_8) {
LOG_DEBUG(LOG_TAG, "\tnum_subbands: (8)");
}
LOG_DEBUG(LOG_TAG, "\talloc_method: 0x%x)", sbc_cie.alloc_method);
if (sbc_cie.alloc_method & A2DP_SBC_IE_ALLOC_MD_S) {
LOG_DEBUG(LOG_TAG, "\talloc_method: (SNR)");
}
if (sbc_cie.alloc_method & A2DP_SBC_IE_ALLOC_MD_L) {
LOG_DEBUG(LOG_TAG, "\talloc_method: (Loundess)");
}
LOG_DEBUG(LOG_TAG, "\tBit pool Min:%d Max:%d", sbc_cie.min_bitpool,
sbc_cie.max_bitpool);
}
const tA2DP_ENCODER_INTERFACE* A2DP_GetEncoderInterfaceSbc(
const uint8_t* p_codec_info) {
if (!A2DP_IsSourceCodecValidSbc(p_codec_info)) return NULL;
return &a2dp_encoder_interface_sbc;
}
bool A2DP_AdjustCodecSbc(uint8_t* p_codec_info) {
tA2DP_SBC_CIE cfg_cie;
if (A2DP_ParseInfoSbc(&cfg_cie, p_codec_info, true) != A2DP_SUCCESS)
return false;
// Updated the max bitpool
if (cfg_cie.max_bitpool > A2DP_SBC_MAX_BITPOOL) {
LOG_WARN(LOG_TAG, "Updated the SBC codec max bitpool from %d to %d",
cfg_cie.max_bitpool, A2DP_SBC_MAX_BITPOOL);
cfg_cie.max_bitpool = A2DP_SBC_MAX_BITPOOL;
}
return (A2DP_BuildInfoSbc(AVDT_MEDIA_TYPE_AUDIO, &cfg_cie, p_codec_info) ==
A2DP_SUCCESS);
}
btav_a2dp_codec_index_t A2DP_SourceCodecIndexSbc(
UNUSED_ATTR const uint8_t* p_codec_info) {
return BTAV_A2DP_CODEC_INDEX_SOURCE_SBC;
}
const char* A2DP_CodecIndexStrSbc(void) { return "SBC"; }
const char* A2DP_CodecIndexStrSbcSink(void) { return "SBC SINK"; }
bool A2DP_InitCodecConfigSbc(tAVDT_CFG* p_cfg) {
if (A2DP_BuildInfoSbc(AVDT_MEDIA_TYPE_AUDIO, &a2dp_sbc_caps,
p_cfg->codec_info) != A2DP_SUCCESS) {
return false;
}
#if (BTA_AV_CO_CP_SCMS_T == TRUE)
/* Content protection info - support SCMS-T */
uint8_t* p = p_cfg->protect_info;
*p++ = AVDT_CP_LOSC;
UINT16_TO_STREAM(p, AVDT_CP_SCMS_T_ID);
p_cfg->num_protect = 1;
#endif
return true;
}
bool A2DP_InitCodecConfigSbcSink(tAVDT_CFG* p_cfg) {
if (A2DP_BuildInfoSbc(AVDT_MEDIA_TYPE_AUDIO, &a2dp_sbc_sink_caps,
p_cfg->codec_info) != A2DP_SUCCESS) {
return false;
}
return true;
}
UNUSED_ATTR static void build_codec_config(const tA2DP_SBC_CIE& config_cie,
btav_a2dp_codec_config_t* result) {
if (config_cie.samp_freq & A2DP_SBC_IE_SAMP_FREQ_44)
result->sample_rate |= BTAV_A2DP_CODEC_SAMPLE_RATE_44100;
if (config_cie.samp_freq & A2DP_SBC_IE_SAMP_FREQ_48)
result->sample_rate |= BTAV_A2DP_CODEC_SAMPLE_RATE_48000;
result->bits_per_sample = BTAV_A2DP_CODEC_BITS_PER_SAMPLE_16;
if (config_cie.ch_mode & A2DP_SBC_IE_CH_MD_MONO)
result->channel_mode |= BTAV_A2DP_CODEC_CHANNEL_MODE_MONO;
if (config_cie.ch_mode & (A2DP_SBC_IE_CH_MD_STEREO | A2DP_SBC_IE_CH_MD_JOINT |
A2DP_SBC_IE_CH_MD_DUAL)) {
result->channel_mode |= BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
}
}
A2dpCodecConfigSbc::A2dpCodecConfigSbc()
: A2dpCodecConfig(BTAV_A2DP_CODEC_INDEX_SOURCE_SBC, "SBC") {}
A2dpCodecConfigSbc::~A2dpCodecConfigSbc() {}
bool A2dpCodecConfigSbc::init() {
if (!isValid()) return false;
// Load the encoder
if (!A2DP_LoadEncoderSbc()) {
LOG_ERROR(LOG_TAG, "%s: cannot load the encoder", __func__);
return false;
}
return true;
}
//
// Selects the best sample rate from |samp_freq|.
// The result is stored in |p_result| and |p_codec_config|.
// Returns true if a selection was made, otherwise false.
//
static bool select_best_sample_rate(uint8_t samp_freq, tA2DP_SBC_CIE* p_result,
btav_a2dp_codec_config_t* p_codec_config) {
if (samp_freq & A2DP_SBC_IE_SAMP_FREQ_48) {
p_result->samp_freq = A2DP_SBC_IE_SAMP_FREQ_48;
p_codec_config->sample_rate = BTAV_A2DP_CODEC_SAMPLE_RATE_48000;
return true;
}
if (samp_freq & A2DP_SBC_IE_SAMP_FREQ_44) {
p_result->samp_freq = A2DP_SBC_IE_SAMP_FREQ_44;
p_codec_config->sample_rate = BTAV_A2DP_CODEC_SAMPLE_RATE_44100;
return true;
}
return false;
}
//
// Selects the audio sample rate from |p_codec_audio_config|.
// |samp_freq| contains the capability.
// The result is stored in |p_result| and |p_codec_config|.
// Returns true if a selection was made, otherwise false.
//
static bool select_audio_sample_rate(
const btav_a2dp_codec_config_t* p_codec_audio_config, uint8_t samp_freq,
tA2DP_SBC_CIE* p_result, btav_a2dp_codec_config_t* p_codec_config) {
switch (p_codec_audio_config->sample_rate) {
case BTAV_A2DP_CODEC_SAMPLE_RATE_44100:
if (samp_freq & A2DP_SBC_IE_SAMP_FREQ_44) {
p_result->samp_freq = A2DP_SBC_IE_SAMP_FREQ_44;
p_codec_config->sample_rate = BTAV_A2DP_CODEC_SAMPLE_RATE_44100;
return true;
}
break;
case BTAV_A2DP_CODEC_SAMPLE_RATE_48000:
if (samp_freq & A2DP_SBC_IE_SAMP_FREQ_48) {
p_result->samp_freq = A2DP_SBC_IE_SAMP_FREQ_48;
p_codec_config->sample_rate = BTAV_A2DP_CODEC_SAMPLE_RATE_48000;
return true;
}
break;
case BTAV_A2DP_CODEC_SAMPLE_RATE_88200:
case BTAV_A2DP_CODEC_SAMPLE_RATE_96000:
case BTAV_A2DP_CODEC_SAMPLE_RATE_176400:
case BTAV_A2DP_CODEC_SAMPLE_RATE_192000:
case BTAV_A2DP_CODEC_SAMPLE_RATE_NONE:
break;
}
return false;
}
//
// Selects the best bits per sample.
// The result is stored in |p_codec_config|.
// Returns true if a selection was made, otherwise false.
//
static bool select_best_bits_per_sample(
btav_a2dp_codec_config_t* p_codec_config) {
p_codec_config->bits_per_sample = BTAV_A2DP_CODEC_BITS_PER_SAMPLE_16;
return true;
}
//
// Selects the audio bits per sample from |p_codec_audio_config|.
// The result is stored in |p_codec_config|.
// Returns true if a selection was made, otherwise false.
//
static bool select_audio_bits_per_sample(
const btav_a2dp_codec_config_t* p_codec_audio_config,
btav_a2dp_codec_config_t* p_codec_config) {
switch (p_codec_audio_config->bits_per_sample) {
case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_16:
p_codec_config->bits_per_sample = BTAV_A2DP_CODEC_BITS_PER_SAMPLE_16;
return true;
case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_24:
case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_32:
case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_NONE:
break;
}
return false;
}
//
// Selects the best channel mode from |ch_mode|.
// The result is stored in |p_result| and |p_codec_config|.
// Returns true if a selection was made, otherwise false.
//
static bool select_best_channel_mode(uint8_t ch_mode, tA2DP_SBC_CIE* p_result,
btav_a2dp_codec_config_t* p_codec_config) {
if (ch_mode & A2DP_SBC_IE_CH_MD_JOINT) {
p_result->ch_mode = A2DP_SBC_IE_CH_MD_JOINT;
p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
return true;
}
if (ch_mode & A2DP_SBC_IE_CH_MD_STEREO) {
p_result->ch_mode = A2DP_SBC_IE_CH_MD_STEREO;
p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
return true;
}
if (ch_mode & A2DP_SBC_IE_CH_MD_DUAL) {
p_result->ch_mode = A2DP_SBC_IE_CH_MD_DUAL;
p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
return true;
}
if (ch_mode & A2DP_SBC_IE_CH_MD_MONO) {
p_result->ch_mode = A2DP_SBC_IE_CH_MD_MONO;
p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_MONO;
return true;
}
return false;
}
//
// Selects the audio channel mode from |p_codec_audio_config|.
// |ch_mode| contains the capability.
// The result is stored in |p_result| and |p_codec_config|.
// Returns true if a selection was made, otherwise false.
//
static bool select_audio_channel_mode(
const btav_a2dp_codec_config_t* p_codec_audio_config, uint8_t ch_mode,
tA2DP_SBC_CIE* p_result, btav_a2dp_codec_config_t* p_codec_config) {
switch (p_codec_audio_config->channel_mode) {
case BTAV_A2DP_CODEC_CHANNEL_MODE_MONO:
if (ch_mode & A2DP_SBC_IE_CH_MD_MONO) {
p_result->ch_mode = A2DP_SBC_IE_CH_MD_MONO;
p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_MONO;
return true;
}
break;
case BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO:
if (ch_mode & A2DP_SBC_IE_CH_MD_JOINT) {
p_result->ch_mode = A2DP_SBC_IE_CH_MD_JOINT;
p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
return true;
}
if (ch_mode & A2DP_SBC_IE_CH_MD_STEREO) {
p_result->ch_mode = A2DP_SBC_IE_CH_MD_STEREO;
p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
return true;
}
if (ch_mode & A2DP_SBC_IE_CH_MD_DUAL) {
p_result->ch_mode = A2DP_SBC_IE_CH_MD_DUAL;
p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
return true;
}
break;
case BTAV_A2DP_CODEC_CHANNEL_MODE_NONE:
break;
}
return false;
}
bool A2dpCodecConfigSbc::setCodecConfig(const uint8_t* p_peer_codec_info,
bool is_capability,
uint8_t* p_result_codec_config) {
std::lock_guard<std::recursive_mutex> lock(codec_mutex_);
tA2DP_SBC_CIE sink_info_cie;
tA2DP_SBC_CIE result_config_cie;
uint8_t samp_freq;
uint8_t ch_mode;
uint8_t block_len;
uint8_t num_subbands;
uint8_t alloc_method;
// Save the internal state
btav_a2dp_codec_config_t saved_codec_config = codec_config_;
btav_a2dp_codec_config_t saved_codec_capability = codec_capability_;
btav_a2dp_codec_config_t saved_codec_user_config = codec_user_config_;
btav_a2dp_codec_config_t saved_codec_audio_config = codec_audio_config_;
uint8_t saved_ota_codec_config[AVDT_CODEC_SIZE];
uint8_t saved_ota_codec_peer_capability[AVDT_CODEC_SIZE];
uint8_t saved_ota_codec_peer_config[AVDT_CODEC_SIZE];
memcpy(saved_ota_codec_config, ota_codec_config_, sizeof(ota_codec_config_));
memcpy(saved_ota_codec_peer_capability, ota_codec_peer_capability_,
sizeof(ota_codec_peer_capability_));
memcpy(saved_ota_codec_peer_config, ota_codec_peer_config_,
sizeof(ota_codec_peer_config_));
tA2DP_STATUS status =
A2DP_ParseInfoSbc(&sink_info_cie, p_peer_codec_info, is_capability);
if (status != A2DP_SUCCESS) {
LOG_ERROR(LOG_TAG, "%s: can't parse peer's Sink capabilities: error = %d",
__func__, status);
goto fail;
}
//
// Build the preferred configuration
//
memset(&result_config_cie, 0, sizeof(result_config_cie));
//
// Select the sample frequency
//
samp_freq = a2dp_sbc_caps.samp_freq & sink_info_cie.samp_freq;
codec_config_.sample_rate = BTAV_A2DP_CODEC_SAMPLE_RATE_NONE;
switch (codec_user_config_.sample_rate) {
case BTAV_A2DP_CODEC_SAMPLE_RATE_44100:
if (samp_freq & A2DP_SBC_IE_SAMP_FREQ_44) {
result_config_cie.samp_freq = A2DP_SBC_IE_SAMP_FREQ_44;
codec_capability_.sample_rate = codec_user_config_.sample_rate;
codec_config_.sample_rate = codec_user_config_.sample_rate;
}
break;
case BTAV_A2DP_CODEC_SAMPLE_RATE_48000:
if (samp_freq & A2DP_SBC_IE_SAMP_FREQ_48) {
result_config_cie.samp_freq = A2DP_SBC_IE_SAMP_FREQ_48;
codec_capability_.sample_rate = codec_user_config_.sample_rate;
codec_config_.sample_rate = codec_user_config_.sample_rate;
}
break;
case BTAV_A2DP_CODEC_SAMPLE_RATE_88200:
case BTAV_A2DP_CODEC_SAMPLE_RATE_96000:
case BTAV_A2DP_CODEC_SAMPLE_RATE_176400:
case BTAV_A2DP_CODEC_SAMPLE_RATE_192000:
case BTAV_A2DP_CODEC_SAMPLE_RATE_NONE:
codec_capability_.sample_rate = BTAV_A2DP_CODEC_SAMPLE_RATE_NONE;
codec_config_.sample_rate = BTAV_A2DP_CODEC_SAMPLE_RATE_NONE;
break;
}
// Select the sample frequency if there is no user preference
do {
if (codec_config_.sample_rate != BTAV_A2DP_CODEC_SAMPLE_RATE_NONE) break;
// Compute the common capability
if (samp_freq & A2DP_SBC_IE_SAMP_FREQ_44)
codec_capability_.sample_rate |= BTAV_A2DP_CODEC_SAMPLE_RATE_44100;
if (samp_freq & A2DP_SBC_IE_SAMP_FREQ_48)
codec_capability_.sample_rate |= BTAV_A2DP_CODEC_SAMPLE_RATE_48000;
// No user preference - try the codec audio config
if (select_audio_sample_rate(&codec_audio_config_, samp_freq,
&result_config_cie, &codec_config_)) {
break;
}
// No user preference - try the default config
if (select_best_sample_rate(
a2dp_sbc_default_config.samp_freq & sink_info_cie.samp_freq,
&result_config_cie, &codec_config_)) {
break;
}
// No user preference - use the best match
if (select_best_sample_rate(samp_freq, &result_config_cie,
&codec_config_)) {
break;
}
} while (false);
if (codec_config_.sample_rate == BTAV_A2DP_CODEC_SAMPLE_RATE_NONE) {
LOG_ERROR(LOG_TAG,
"%s: cannot match sample frequency: source caps = 0x%x "
"sink info = 0x%x",
__func__, a2dp_sbc_caps.samp_freq, sink_info_cie.samp_freq);
goto fail;
}
//
// Select the bits per sample
//
// NOTE: this information is NOT included in the SBC A2DP codec description
// that is sent OTA.
codec_config_.bits_per_sample = BTAV_A2DP_CODEC_BITS_PER_SAMPLE_NONE;
switch (codec_user_config_.bits_per_sample) {
case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_16:
codec_capability_.bits_per_sample = codec_user_config_.bits_per_sample;
codec_config_.bits_per_sample = codec_user_config_.bits_per_sample;
break;
case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_24:
case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_32:
case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_NONE:
codec_capability_.bits_per_sample = BTAV_A2DP_CODEC_BITS_PER_SAMPLE_NONE;
codec_config_.bits_per_sample = BTAV_A2DP_CODEC_BITS_PER_SAMPLE_NONE;
break;
}
// Select the bits per sample if there is no user preference
do {
if (codec_config_.bits_per_sample != BTAV_A2DP_CODEC_BITS_PER_SAMPLE_NONE)
break;
// Compute the common capability
codec_capability_.bits_per_sample = BTAV_A2DP_CODEC_BITS_PER_SAMPLE_16;
// No user preference - try the codec audio config
if (select_audio_bits_per_sample(&codec_audio_config_, &codec_config_)) {
break;
}
// No user preference - try the default config
if (select_best_bits_per_sample(&codec_config_)) {
break;
}
// No user preference - use the best match
// TODO: no-op - temporary kept here for consistency
if (select_best_bits_per_sample(&codec_config_)) {
break;
}
} while (false);
if (codec_config_.bits_per_sample == BTAV_A2DP_CODEC_BITS_PER_SAMPLE_NONE) {
LOG_ERROR(LOG_TAG,
"%s: cannot match bits per sample: user preference = 0x%x",
__func__, codec_user_config_.bits_per_sample);
goto fail;
}
//
// Select the channel mode
//
ch_mode = a2dp_sbc_caps.ch_mode & sink_info_cie.ch_mode;
codec_config_.channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_NONE;
switch (codec_user_config_.channel_mode) {
case BTAV_A2DP_CODEC_CHANNEL_MODE_MONO:
if (ch_mode & A2DP_SBC_IE_CH_MD_MONO) {
result_config_cie.ch_mode = A2DP_SBC_IE_CH_MD_MONO;
codec_capability_.channel_mode = codec_user_config_.channel_mode;
codec_config_.channel_mode = codec_user_config_.channel_mode;
}
break;
case BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO:
if (ch_mode & A2DP_SBC_IE_CH_MD_JOINT) {
result_config_cie.ch_mode = A2DP_SBC_IE_CH_MD_JOINT;
codec_capability_.channel_mode = codec_user_config_.channel_mode;
codec_config_.channel_mode = codec_user_config_.channel_mode;
break;
}
if (ch_mode & A2DP_SBC_IE_CH_MD_STEREO) {
result_config_cie.ch_mode = A2DP_SBC_IE_CH_MD_STEREO;
codec_capability_.channel_mode = codec_user_config_.channel_mode;
codec_config_.channel_mode = codec_user_config_.channel_mode;
break;
}
if (ch_mode & A2DP_SBC_IE_CH_MD_DUAL) {
result_config_cie.ch_mode = A2DP_SBC_IE_CH_MD_DUAL;
codec_capability_.channel_mode = codec_user_config_.channel_mode;
codec_config_.channel_mode = codec_user_config_.channel_mode;
break;
}
break;
case BTAV_A2DP_CODEC_CHANNEL_MODE_NONE:
codec_capability_.channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_NONE;
codec_config_.channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_NONE;
break;
}
// Select the channel mode if there is no user preference
do {
if (codec_config_.channel_mode != BTAV_A2DP_CODEC_CHANNEL_MODE_NONE) break;
// Compute the common capability
if (ch_mode & A2DP_SBC_IE_CH_MD_MONO)
codec_capability_.channel_mode |= BTAV_A2DP_CODEC_CHANNEL_MODE_MONO;
if (ch_mode & (A2DP_SBC_IE_CH_MD_JOINT | A2DP_SBC_IE_CH_MD_STEREO |
A2DP_SBC_IE_CH_MD_DUAL)) {
codec_capability_.channel_mode |= BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
}
// No user preference - use the codec audio config
if (select_audio_channel_mode(&codec_audio_config_, ch_mode,
&result_config_cie, &codec_config_)) {
break;
}
// No user preference - try the default config
if (select_best_channel_mode(
a2dp_sbc_default_config.ch_mode & sink_info_cie.ch_mode,
&result_config_cie, &codec_config_)) {
break;
}
// No user preference - use the best match
if (select_best_channel_mode(ch_mode, &result_config_cie, &codec_config_)) {
break;
}
} while (false);
if (codec_config_.channel_mode == BTAV_A2DP_CODEC_CHANNEL_MODE_NONE) {
LOG_ERROR(LOG_TAG,
"%s: cannot match channel mode: source caps = 0x%x "
"sink info = 0x%x",
__func__, a2dp_sbc_caps.ch_mode, sink_info_cie.ch_mode);
goto fail;
}
//
// Select the block length
//
block_len = a2dp_sbc_caps.block_len & sink_info_cie.block_len;
if (block_len & A2DP_SBC_IE_BLOCKS_16) {
result_config_cie.block_len = A2DP_SBC_IE_BLOCKS_16;
} else if (block_len & A2DP_SBC_IE_BLOCKS_12) {
result_config_cie.block_len = A2DP_SBC_IE_BLOCKS_12;
} else if (block_len & A2DP_SBC_IE_BLOCKS_8) {
result_config_cie.block_len = A2DP_SBC_IE_BLOCKS_8;
} else if (block_len & A2DP_SBC_IE_BLOCKS_4) {
result_config_cie.block_len = A2DP_SBC_IE_BLOCKS_4;
} else {
LOG_ERROR(LOG_TAG,
"%s: cannot match block length: source caps = 0x%x "
"sink info = 0x%x",
__func__, a2dp_sbc_caps.block_len, sink_info_cie.block_len);
goto fail;
}
//
// Select the number of sub-bands
//
num_subbands = a2dp_sbc_caps.num_subbands & sink_info_cie.num_subbands;
if (num_subbands & A2DP_SBC_IE_SUBBAND_8) {
result_config_cie.num_subbands = A2DP_SBC_IE_SUBBAND_8;
} else if (num_subbands & A2DP_SBC_IE_SUBBAND_4) {
result_config_cie.num_subbands = A2DP_SBC_IE_SUBBAND_4;
} else {
LOG_ERROR(LOG_TAG,
"%s: cannot match number of sub-bands: source caps = 0x%x "
"sink info = 0x%x",
__func__, a2dp_sbc_caps.num_subbands, sink_info_cie.num_subbands);
goto fail;
}
//
// Select the allocation method
//
alloc_method = a2dp_sbc_caps.alloc_method & sink_info_cie.alloc_method;
if (alloc_method & A2DP_SBC_IE_ALLOC_MD_L) {
result_config_cie.alloc_method = A2DP_SBC_IE_ALLOC_MD_L;
} else if (alloc_method & A2DP_SBC_IE_ALLOC_MD_S) {
result_config_cie.alloc_method = A2DP_SBC_IE_ALLOC_MD_S;
} else {
LOG_ERROR(LOG_TAG,
"%s: cannot match allocation method: source caps = 0x%x "
"sink info = 0x%x",
__func__, a2dp_sbc_caps.alloc_method, sink_info_cie.alloc_method);
goto fail;
}
//
// Select the min/max bitpool
//
result_config_cie.min_bitpool = a2dp_sbc_caps.min_bitpool;
if (result_config_cie.min_bitpool < sink_info_cie.min_bitpool)
result_config_cie.min_bitpool = sink_info_cie.min_bitpool;
result_config_cie.max_bitpool = a2dp_sbc_caps.max_bitpool;
if (result_config_cie.max_bitpool > sink_info_cie.max_bitpool)
result_config_cie.max_bitpool = sink_info_cie.max_bitpool;
if (result_config_cie.min_bitpool > result_config_cie.max_bitpool) {
LOG_ERROR(LOG_TAG,
"%s: cannot match min/max bitpool: "
"source caps min/max = 0x%x/0x%x sink info min/max = 0x%x/0x%x",
__func__, a2dp_sbc_caps.min_bitpool, a2dp_sbc_caps.max_bitpool,
sink_info_cie.min_bitpool, sink_info_cie.max_bitpool);
goto fail;
}
if (A2DP_BuildInfoSbc(AVDT_MEDIA_TYPE_AUDIO, &result_config_cie,
p_result_codec_config) != A2DP_SUCCESS) {
goto fail;
}
//
// Copy the codec-specific fields if they are not zero
//
if (codec_user_config_.codec_specific_1 != 0)
codec_config_.codec_specific_1 = codec_user_config_.codec_specific_1;
if (codec_user_config_.codec_specific_2 != 0)
codec_config_.codec_specific_2 = codec_user_config_.codec_specific_2;
if (codec_user_config_.codec_specific_3 != 0)
codec_config_.codec_specific_3 = codec_user_config_.codec_specific_3;
if (codec_user_config_.codec_specific_4 != 0)
codec_config_.codec_specific_4 = codec_user_config_.codec_specific_4;
// Create a local copy of the peer codec capability/config, and the
// result codec config.
if (is_capability) {
status = A2DP_BuildInfoSbc(AVDT_MEDIA_TYPE_AUDIO, &sink_info_cie,
ota_codec_peer_capability_);
} else {
status = A2DP_BuildInfoSbc(AVDT_MEDIA_TYPE_AUDIO, &sink_info_cie,
ota_codec_peer_config_);
}
CHECK(status == A2DP_SUCCESS);
status = A2DP_BuildInfoSbc(AVDT_MEDIA_TYPE_AUDIO, &result_config_cie,
ota_codec_config_);
CHECK(status == A2DP_SUCCESS);
return true;
fail:
// Restore the internal state
codec_config_ = saved_codec_config;
codec_capability_ = saved_codec_capability;
codec_user_config_ = saved_codec_user_config;
codec_audio_config_ = saved_codec_audio_config;
memcpy(ota_codec_config_, saved_ota_codec_config, sizeof(ota_codec_config_));
memcpy(ota_codec_peer_capability_, saved_ota_codec_peer_capability,
sizeof(ota_codec_peer_capability_));
memcpy(ota_codec_peer_config_, saved_ota_codec_peer_config,
sizeof(ota_codec_peer_config_));
return false;
}
A2dpCodecConfigSbcSink::A2dpCodecConfigSbcSink()
: A2dpCodecConfig(BTAV_A2DP_CODEC_INDEX_SINK_SBC, "SBC(Sink)") {}
A2dpCodecConfigSbcSink::~A2dpCodecConfigSbcSink() {}
bool A2dpCodecConfigSbcSink::init() {
if (!isValid()) return false;
return true;
}
bool A2dpCodecConfigSbcSink::setCodecConfig(
UNUSED_ATTR const uint8_t* p_peer_codec_info,
UNUSED_ATTR bool is_capability,
UNUSED_ATTR uint8_t* p_result_codec_config) {
// TODO: This method applies only to Source codecs
return false;
}
bool A2dpCodecConfigSbcSink::updateEncoderUserConfig(
UNUSED_ATTR const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params,
UNUSED_ATTR bool* p_restart_input, UNUSED_ATTR bool* p_restart_output,
UNUSED_ATTR bool* p_config_updated) {
// TODO: This method applies only to Source codecs
return false;
}