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PL286/system/bt/stack/a2dp/a2dp_vendor_ldac_encoder.cc

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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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.
*/
#define LOG_TAG "a2dp_vendor_ldac_encoder"
#define ATRACE_TAG ATRACE_TAG_AUDIO
#include "a2dp_vendor_ldac_encoder.h"
#ifndef OS_GENERIC
#include <cutils/trace.h>
#endif
#include <dlfcn.h>
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <ldacBT.h>
#include "a2dp_vendor.h"
#include "a2dp_vendor_ldac.h"
#include "a2dp_vendor_ldac_abr.h"
#include "bt_common.h"
#include "osi/include/log.h"
#include "osi/include/osi.h"
//
// Encoder for LDAC Source Codec
//
//
// The LDAC encoder shared library, and the functions to use
//
static const char* LDAC_ENCODER_LIB_NAME = "libldacBT_enc.so";
static void* ldac_encoder_lib_handle = NULL;
static const char* LDAC_GET_HANDLE_NAME = "ldacBT_get_handle";
typedef HANDLE_LDAC_BT (*tLDAC_GET_HANDLE)(void);
static const char* LDAC_FREE_HANDLE_NAME = "ldacBT_free_handle";
typedef void (*tLDAC_FREE_HANDLE)(HANDLE_LDAC_BT hLdacParam);
static const char* LDAC_CLOSE_HANDLE_NAME = "ldacBT_close_handle";
typedef void (*tLDAC_CLOSE_HANDLE)(HANDLE_LDAC_BT hLdacParam);
static const char* LDAC_GET_VERSION_NAME = "ldacBT_get_version";
typedef int (*tLDAC_GET_VERSION)(void);
static const char* LDAC_GET_BITRATE_NAME = "ldacBT_get_bitrate";
typedef int (*tLDAC_GET_BITRATE)(HANDLE_LDAC_BT hLdacParam);
static const char* LDAC_GET_SAMPLING_FREQ_NAME = "ldacBT_get_sampling_freq";
typedef int (*tLDAC_GET_SAMPLING_FREQ)(HANDLE_LDAC_BT hLdacParam);
static const char* LDAC_INIT_HANDLE_ENCODE_NAME = "ldacBT_init_handle_encode";
typedef int (*tLDAC_INIT_HANDLE_ENCODE)(HANDLE_LDAC_BT hLdacParam, int mtu,
int eqmid, int channel_mode,
LDACBT_SMPL_FMT_T fmt,
int sampling_freq);
static const char* LDAC_ENCODE_NAME = "ldacBT_encode";
typedef int (*tLDAC_ENCODE)(HANDLE_LDAC_BT hLdacParam, void* p_pcm,
int* p_pcm_encoded_byte, unsigned char* p_stream,
int* pframe_length_wrote, int* pframe_num);
static const char* LDAC_SET_EQMID_NAME = "ldacBT_set_eqmid";
typedef int (*tLDAC_SET_EQMID)(HANDLE_LDAC_BT hLdacParam, int eqmid);
static const char* LDAC_ALTER_EQMID_PRIORITY_NAME =
"ldacBT_alter_eqmid_priority";
typedef int (*tLDAC_ALTER_EQMID_PRIORITY)(HANDLE_LDAC_BT hLdacParam,
int priority);
static const char* LDAC_GET_EQMID_NAME = "ldacBT_get_eqmid";
typedef int (*tLDAC_GET_EQMID)(HANDLE_LDAC_BT hLdacParam);
static const char* LDAC_GET_ERROR_CODE_NAME = "ldacBT_get_error_code";
typedef int (*tLDAC_GET_ERROR_CODE)(HANDLE_LDAC_BT hLdacParam);
static tLDAC_GET_HANDLE ldac_get_handle_func;
static tLDAC_FREE_HANDLE ldac_free_handle_func;
static tLDAC_CLOSE_HANDLE ldac_close_handle_func;
static tLDAC_GET_VERSION ldac_get_version_func;
static tLDAC_GET_BITRATE ldac_get_bitrate_func;
static tLDAC_GET_SAMPLING_FREQ ldac_get_sampling_freq_func;
static tLDAC_INIT_HANDLE_ENCODE ldac_init_handle_encode_func;
static tLDAC_ENCODE ldac_encode_func;
static tLDAC_SET_EQMID ldac_set_eqmid_func;
static tLDAC_ALTER_EQMID_PRIORITY ldac_alter_eqmid_priority_func;
static tLDAC_GET_EQMID ldac_get_eqmid_func;
static tLDAC_GET_ERROR_CODE ldac_get_error_code_func;
// A2DP LDAC encoder interval in milliseconds
#define A2DP_LDAC_ENCODER_INTERVAL_MS 20
#define A2DP_LDAC_MEDIA_BYTES_PER_FRAME 128
// offset
#if (BTA_AV_CO_CP_SCMS_T == TRUE)
#define A2DP_LDAC_OFFSET (AVDT_MEDIA_OFFSET + A2DP_LDAC_MPL_HDR_LEN + 1)
#else
#define A2DP_LDAC_OFFSET (AVDT_MEDIA_OFFSET + A2DP_LDAC_MPL_HDR_LEN)
#endif
typedef struct {
uint32_t sample_rate;
uint8_t channel_mode;
uint8_t bits_per_sample;
int quality_mode_index;
int pcm_wlength;
LDACBT_SMPL_FMT_T pcm_fmt;
} tA2DP_LDAC_ENCODER_PARAMS;
typedef struct {
uint32_t counter;
uint32_t bytes_per_tick; /* pcm bytes read each media task tick */
uint64_t last_frame_us;
} tA2DP_LDAC_FEEDING_STATE;
typedef struct {
uint64_t session_start_us;
size_t media_read_total_expected_packets;
size_t media_read_total_expected_reads_count;
size_t media_read_total_expected_read_bytes;
size_t media_read_total_dropped_packets;
size_t media_read_total_actual_reads_count;
size_t media_read_total_actual_read_bytes;
} a2dp_ldac_encoder_stats_t;
typedef struct {
a2dp_source_read_callback_t read_callback;
a2dp_source_enqueue_callback_t enqueue_callback;
uint16_t TxAaMtuSize;
size_t TxQueueLength;
bool use_SCMS_T;
bool is_peer_edr; // True if the peer device supports EDR
bool peer_supports_3mbps; // True if the peer device supports 3Mbps EDR
uint16_t peer_mtu; // MTU of the A2DP peer
uint32_t timestamp; // Timestamp for the A2DP frames
HANDLE_LDAC_BT ldac_handle;
bool has_ldac_handle; // True if ldac_handle is valid
HANDLE_LDAC_ABR ldac_abr_handle;
bool has_ldac_abr_handle;
int last_ldac_abr_eqmid;
size_t ldac_abr_adjustments;
tA2DP_FEEDING_PARAMS feeding_params;
tA2DP_LDAC_ENCODER_PARAMS ldac_encoder_params;
tA2DP_LDAC_FEEDING_STATE ldac_feeding_state;
a2dp_ldac_encoder_stats_t stats;
} tA2DP_LDAC_ENCODER_CB;
static bool ldac_abr_loaded = false;
static tA2DP_LDAC_ENCODER_CB a2dp_ldac_encoder_cb;
static void a2dp_vendor_ldac_encoder_update(uint16_t peer_mtu,
A2dpCodecConfig* a2dp_codec_config,
bool* p_restart_input,
bool* p_restart_output,
bool* p_config_updated);
static void a2dp_ldac_get_num_frame_iteration(uint8_t* num_of_iterations,
uint8_t* num_of_frames,
uint64_t timestamp_us);
static void a2dp_ldac_encode_frames(uint8_t nb_frame);
static bool a2dp_ldac_read_feeding(uint8_t* read_buffer);
static std::string quality_mode_index_to_name(int quality_mode_index);
static void* load_func(const char* func_name) {
void* func_ptr = dlsym(ldac_encoder_lib_handle, func_name);
if (func_ptr == NULL) {
LOG_ERROR(LOG_TAG,
"%s: cannot find function '%s' in the encoder library: %s",
__func__, func_name, dlerror());
A2DP_VendorUnloadEncoderLdac();
return NULL;
}
return func_ptr;
}
bool A2DP_VendorLoadEncoderLdac(void) {
if (ldac_encoder_lib_handle != NULL) return true; // Already loaded
// Initialize the control block
memset(&a2dp_ldac_encoder_cb, 0, sizeof(a2dp_ldac_encoder_cb));
// Open the encoder library
ldac_encoder_lib_handle = dlopen(LDAC_ENCODER_LIB_NAME, RTLD_NOW);
if (ldac_encoder_lib_handle == NULL) {
LOG_ERROR(LOG_TAG, "%s: cannot open LDAC encoder library %s: %s", __func__,
LDAC_ENCODER_LIB_NAME, dlerror());
return false;
}
// Load all functions
ldac_get_handle_func = (tLDAC_GET_HANDLE)load_func(LDAC_GET_HANDLE_NAME);
if (ldac_get_handle_func == NULL) return false;
ldac_free_handle_func = (tLDAC_FREE_HANDLE)load_func(LDAC_FREE_HANDLE_NAME);
if (ldac_free_handle_func == NULL) return false;
ldac_close_handle_func =
(tLDAC_CLOSE_HANDLE)load_func(LDAC_CLOSE_HANDLE_NAME);
if (ldac_close_handle_func == NULL) return false;
ldac_get_version_func = (tLDAC_GET_VERSION)load_func(LDAC_GET_VERSION_NAME);
if (ldac_get_version_func == NULL) return false;
ldac_get_bitrate_func = (tLDAC_GET_BITRATE)load_func(LDAC_GET_BITRATE_NAME);
if (ldac_get_bitrate_func == NULL) return false;
ldac_get_sampling_freq_func =
(tLDAC_GET_SAMPLING_FREQ)load_func(LDAC_GET_SAMPLING_FREQ_NAME);
if (ldac_get_sampling_freq_func == NULL) return false;
ldac_init_handle_encode_func =
(tLDAC_INIT_HANDLE_ENCODE)load_func(LDAC_INIT_HANDLE_ENCODE_NAME);
if (ldac_init_handle_encode_func == NULL) return false;
ldac_encode_func = (tLDAC_ENCODE)load_func(LDAC_ENCODE_NAME);
if (ldac_encode_func == NULL) return false;
ldac_set_eqmid_func = (tLDAC_SET_EQMID)load_func(LDAC_SET_EQMID_NAME);
if (ldac_set_eqmid_func == NULL) return false;
ldac_alter_eqmid_priority_func =
(tLDAC_ALTER_EQMID_PRIORITY)load_func(LDAC_ALTER_EQMID_PRIORITY_NAME);
if (ldac_alter_eqmid_priority_func == NULL) return false;
ldac_get_eqmid_func = (tLDAC_GET_EQMID)load_func(LDAC_GET_EQMID_NAME);
if (ldac_get_eqmid_func == NULL) return false;
ldac_get_error_code_func =
(tLDAC_GET_ERROR_CODE)load_func(LDAC_GET_ERROR_CODE_NAME);
if (ldac_get_error_code_func == NULL) return false;
if (!A2DP_VendorLoadLdacAbr()) {
LOG_WARN(LOG_TAG, "%s: cannot load the LDAC ABR library", __func__);
ldac_abr_loaded = false;
} else {
ldac_abr_loaded = true;
}
return true;
}
void A2DP_VendorUnloadEncoderLdac(void) {
// Cleanup any LDAC-related state
if (a2dp_ldac_encoder_cb.has_ldac_handle && ldac_free_handle_func != NULL)
ldac_free_handle_func(a2dp_ldac_encoder_cb.ldac_handle);
memset(&a2dp_ldac_encoder_cb, 0, sizeof(a2dp_ldac_encoder_cb));
ldac_get_handle_func = NULL;
ldac_free_handle_func = NULL;
ldac_close_handle_func = NULL;
ldac_get_version_func = NULL;
ldac_get_bitrate_func = NULL;
ldac_get_sampling_freq_func = NULL;
ldac_init_handle_encode_func = NULL;
ldac_encode_func = NULL;
ldac_set_eqmid_func = NULL;
ldac_alter_eqmid_priority_func = NULL;
ldac_get_eqmid_func = NULL;
ldac_get_error_code_func = NULL;
if (ldac_encoder_lib_handle != NULL) {
dlclose(ldac_encoder_lib_handle);
ldac_encoder_lib_handle = NULL;
}
}
void a2dp_vendor_ldac_encoder_init(
const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params,
A2dpCodecConfig* a2dp_codec_config,
a2dp_source_read_callback_t read_callback,
a2dp_source_enqueue_callback_t enqueue_callback) {
if (a2dp_ldac_encoder_cb.has_ldac_handle)
ldac_free_handle_func(a2dp_ldac_encoder_cb.ldac_handle);
if (a2dp_ldac_encoder_cb.has_ldac_abr_handle)
a2dp_ldac_abr_free_handle(a2dp_ldac_encoder_cb.ldac_abr_handle);
memset(&a2dp_ldac_encoder_cb, 0, sizeof(a2dp_ldac_encoder_cb));
a2dp_ldac_encoder_cb.stats.session_start_us = time_get_os_boottime_us();
a2dp_ldac_encoder_cb.read_callback = read_callback;
a2dp_ldac_encoder_cb.enqueue_callback = enqueue_callback;
a2dp_ldac_encoder_cb.is_peer_edr = p_peer_params->is_peer_edr;
a2dp_ldac_encoder_cb.peer_supports_3mbps = p_peer_params->peer_supports_3mbps;
a2dp_ldac_encoder_cb.peer_mtu = p_peer_params->peer_mtu;
a2dp_ldac_encoder_cb.timestamp = 0;
a2dp_ldac_encoder_cb.ldac_abr_handle = NULL;
a2dp_ldac_encoder_cb.has_ldac_abr_handle = false;
a2dp_ldac_encoder_cb.last_ldac_abr_eqmid = -1;
a2dp_ldac_encoder_cb.ldac_abr_adjustments = 0;
a2dp_ldac_encoder_cb.use_SCMS_T = false; // TODO: should be a parameter
#if (BTA_AV_CO_CP_SCMS_T == TRUE)
a2dp_ldac_encoder_cb.use_SCMS_T = true;
#endif
// NOTE: Ignore the restart_input / restart_output flags - this initization
// happens when the connection is (re)started.
bool restart_input = false;
bool restart_output = false;
bool config_updated = false;
a2dp_vendor_ldac_encoder_update(a2dp_ldac_encoder_cb.peer_mtu,
a2dp_codec_config, &restart_input,
&restart_output, &config_updated);
}
bool A2dpCodecConfigLdac::updateEncoderUserConfig(
const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, bool* p_restart_input,
bool* p_restart_output, bool* p_config_updated) {
a2dp_ldac_encoder_cb.is_peer_edr = p_peer_params->is_peer_edr;
a2dp_ldac_encoder_cb.peer_supports_3mbps = p_peer_params->peer_supports_3mbps;
a2dp_ldac_encoder_cb.peer_mtu = p_peer_params->peer_mtu;
a2dp_ldac_encoder_cb.timestamp = 0;
if (a2dp_ldac_encoder_cb.peer_mtu == 0) {
LOG_ERROR(LOG_TAG,
"%s: Cannot update the codec encoder for %s: "
"invalid peer MTU",
__func__, name().c_str());
return false;
}
a2dp_vendor_ldac_encoder_update(a2dp_ldac_encoder_cb.peer_mtu, this,
p_restart_input, p_restart_output,
p_config_updated);
return true;
}
// Update the A2DP LDAC encoder.
// |peer_mtu| is the peer MTU.
// |a2dp_codec_config| is the A2DP codec to use for the update.
static void a2dp_vendor_ldac_encoder_update(uint16_t peer_mtu,
A2dpCodecConfig* a2dp_codec_config,
bool* p_restart_input,
bool* p_restart_output,
bool* p_config_updated) {
tA2DP_LDAC_ENCODER_PARAMS* p_encoder_params =
&a2dp_ldac_encoder_cb.ldac_encoder_params;
uint8_t codec_info[AVDT_CODEC_SIZE];
*p_restart_input = false;
*p_restart_output = false;
*p_config_updated = false;
if (!a2dp_ldac_encoder_cb.has_ldac_handle) {
a2dp_ldac_encoder_cb.ldac_handle = ldac_get_handle_func();
if (a2dp_ldac_encoder_cb.ldac_handle == NULL) {
LOG_ERROR(LOG_TAG, "%s: Cannot get LDAC encoder handle", __func__);
return; // TODO: Return an error?
}
a2dp_ldac_encoder_cb.has_ldac_handle = true;
}
if (!a2dp_codec_config->copyOutOtaCodecConfig(codec_info)) {
LOG_ERROR(LOG_TAG,
"%s: Cannot update the codec encoder for %s: "
"invalid codec config",
__func__, a2dp_codec_config->name().c_str());
return;
}
const uint8_t* p_codec_info = codec_info;
btav_a2dp_codec_config_t codec_config = a2dp_codec_config->getCodecConfig();
// The feeding parameters
tA2DP_FEEDING_PARAMS* p_feeding_params = &a2dp_ldac_encoder_cb.feeding_params;
p_feeding_params->sample_rate =
A2DP_VendorGetTrackSampleRateLdac(p_codec_info);
p_feeding_params->bits_per_sample =
a2dp_codec_config->getAudioBitsPerSample();
p_feeding_params->channel_count =
A2DP_VendorGetTrackChannelCountLdac(p_codec_info);
LOG_DEBUG(LOG_TAG, "%s: sample_rate=%u bits_per_sample=%u channel_count=%u",
__func__, p_feeding_params->sample_rate,
p_feeding_params->bits_per_sample, p_feeding_params->channel_count);
// The codec parameters
p_encoder_params->sample_rate =
a2dp_ldac_encoder_cb.feeding_params.sample_rate;
p_encoder_params->channel_mode =
A2DP_VendorGetChannelModeCodeLdac(p_codec_info);
uint16_t mtu_size =
BT_DEFAULT_BUFFER_SIZE - A2DP_LDAC_OFFSET - sizeof(BT_HDR);
if (mtu_size < peer_mtu) {
a2dp_ldac_encoder_cb.TxAaMtuSize = mtu_size;
} else {
a2dp_ldac_encoder_cb.TxAaMtuSize = peer_mtu;
}
// Set the quality mode index
int old_quality_mode_index = p_encoder_params->quality_mode_index;
if (codec_config.codec_specific_1 != 0) {
p_encoder_params->quality_mode_index = codec_config.codec_specific_1 % 10;
LOG_DEBUG(LOG_TAG, "%s: setting quality mode to %s", __func__,
quality_mode_index_to_name(p_encoder_params->quality_mode_index)
.c_str());
} else {
p_encoder_params->quality_mode_index = A2DP_LDAC_QUALITY_ABR;
LOG_DEBUG(LOG_TAG, "%s: setting quality mode to default %s", __func__,
quality_mode_index_to_name(p_encoder_params->quality_mode_index)
.c_str());
}
int ldac_eqmid = LDAC_ABR_MODE_EQMID;
if (p_encoder_params->quality_mode_index == A2DP_LDAC_QUALITY_ABR) {
if (!ldac_abr_loaded) {
p_encoder_params->quality_mode_index = A2DP_LDAC_QUALITY_MID;
LOG_WARN(
LOG_TAG,
"%s: LDAC ABR library is not loaded, resetting quality mode to %s",
__func__,
quality_mode_index_to_name(p_encoder_params->quality_mode_index)
.c_str());
} else {
LOG_DEBUG(LOG_TAG, "%s: changing mode from %s to %s", __func__,
quality_mode_index_to_name(old_quality_mode_index).c_str(),
quality_mode_index_to_name(p_encoder_params->quality_mode_index)
.c_str());
if (a2dp_ldac_encoder_cb.ldac_abr_handle != NULL) {
LOG_DEBUG(LOG_TAG, "%s: already in LDAC ABR mode, do nothing.",
__func__);
} else {
LOG_DEBUG(LOG_TAG, "%s: get and init LDAC ABR handle.", __func__);
a2dp_ldac_encoder_cb.ldac_abr_handle = a2dp_ldac_abr_get_handle();
if (a2dp_ldac_encoder_cb.ldac_abr_handle != NULL) {
a2dp_ldac_encoder_cb.has_ldac_abr_handle = true;
a2dp_ldac_encoder_cb.last_ldac_abr_eqmid = -1;
a2dp_ldac_encoder_cb.ldac_abr_adjustments = 0;
a2dp_ldac_abr_init(a2dp_ldac_encoder_cb.ldac_abr_handle,
A2DP_LDAC_ENCODER_INTERVAL_MS);
} else {
p_encoder_params->quality_mode_index = A2DP_LDAC_QUALITY_MID;
LOG_DEBUG(
LOG_TAG,
"%s: get LDAC ABR handle failed, resetting quality mode to %s.",
__func__,
quality_mode_index_to_name(p_encoder_params->quality_mode_index)
.c_str());
}
}
}
} else {
ldac_eqmid = p_encoder_params->quality_mode_index;
LOG_DEBUG(LOG_TAG, "%s: in %s mode, free LDAC ABR handle.", __func__,
quality_mode_index_to_name(ldac_eqmid).c_str());
if (a2dp_ldac_encoder_cb.has_ldac_abr_handle) {
a2dp_ldac_abr_free_handle(a2dp_ldac_encoder_cb.ldac_abr_handle);
a2dp_ldac_encoder_cb.ldac_abr_handle = NULL;
a2dp_ldac_encoder_cb.has_ldac_abr_handle = false;
a2dp_ldac_encoder_cb.last_ldac_abr_eqmid = -1;
a2dp_ldac_encoder_cb.ldac_abr_adjustments = 0;
}
}
if (p_encoder_params->quality_mode_index != old_quality_mode_index)
*p_config_updated = true;
p_encoder_params->pcm_wlength =
a2dp_ldac_encoder_cb.feeding_params.bits_per_sample >> 3;
// Set the Audio format from pcm_wlength
p_encoder_params->pcm_fmt = LDACBT_SMPL_FMT_S16;
if (p_encoder_params->pcm_wlength == 2)
p_encoder_params->pcm_fmt = LDACBT_SMPL_FMT_S16;
else if (p_encoder_params->pcm_wlength == 3)
p_encoder_params->pcm_fmt = LDACBT_SMPL_FMT_S24;
else if (p_encoder_params->pcm_wlength == 4)
p_encoder_params->pcm_fmt = LDACBT_SMPL_FMT_S32;
LOG_DEBUG(LOG_TAG, "%s: MTU=%d, peer_mtu=%d", __func__,
a2dp_ldac_encoder_cb.TxAaMtuSize, peer_mtu);
LOG_DEBUG(LOG_TAG,
"%s: sample_rate: %d channel_mode: %d "
"quality_mode_index: %d pcm_wlength: %d pcm_fmt: %d",
__func__, p_encoder_params->sample_rate,
p_encoder_params->channel_mode,
p_encoder_params->quality_mode_index, p_encoder_params->pcm_wlength,
p_encoder_params->pcm_fmt);
// Initialize the encoder.
// NOTE: MTU in the initialization must include the AVDT media header size.
int result = ldac_init_handle_encode_func(
a2dp_ldac_encoder_cb.ldac_handle,
a2dp_ldac_encoder_cb.TxAaMtuSize + AVDT_MEDIA_HDR_SIZE, ldac_eqmid,
p_encoder_params->channel_mode, p_encoder_params->pcm_fmt,
p_encoder_params->sample_rate);
if (result != 0) {
LOG_ERROR(LOG_TAG, "%s: error initializing the LDAC encoder: %d", __func__,
result);
}
}
void a2dp_vendor_ldac_encoder_cleanup(void) {
if (a2dp_ldac_encoder_cb.has_ldac_abr_handle)
a2dp_ldac_abr_free_handle(a2dp_ldac_encoder_cb.ldac_abr_handle);
if (a2dp_ldac_encoder_cb.has_ldac_handle)
ldac_free_handle_func(a2dp_ldac_encoder_cb.ldac_handle);
memset(&a2dp_ldac_encoder_cb, 0, sizeof(a2dp_ldac_encoder_cb));
}
void a2dp_vendor_ldac_feeding_reset(void) {
/* By default, just clear the entire state */
memset(&a2dp_ldac_encoder_cb.ldac_feeding_state, 0,
sizeof(a2dp_ldac_encoder_cb.ldac_feeding_state));
a2dp_ldac_encoder_cb.ldac_feeding_state.bytes_per_tick =
(a2dp_ldac_encoder_cb.feeding_params.sample_rate *
a2dp_ldac_encoder_cb.feeding_params.bits_per_sample / 8 *
a2dp_ldac_encoder_cb.feeding_params.channel_count *
A2DP_LDAC_ENCODER_INTERVAL_MS) /
1000;
LOG_DEBUG(LOG_TAG, "%s: PCM bytes per tick %u", __func__,
a2dp_ldac_encoder_cb.ldac_feeding_state.bytes_per_tick);
}
void a2dp_vendor_ldac_feeding_flush(void) {
a2dp_ldac_encoder_cb.ldac_feeding_state.counter = 0;
}
period_ms_t a2dp_vendor_ldac_get_encoder_interval_ms(void) {
return A2DP_LDAC_ENCODER_INTERVAL_MS;
}
void a2dp_vendor_ldac_send_frames(uint64_t timestamp_us) {
uint8_t nb_frame = 0;
uint8_t nb_iterations = 0;
a2dp_ldac_get_num_frame_iteration(&nb_iterations, &nb_frame, timestamp_us);
LOG_VERBOSE(LOG_TAG, "%s: Sending %d frames per iteration, %d iterations",
__func__, nb_frame, nb_iterations);
if (nb_frame == 0) return;
for (uint8_t counter = 0; counter < nb_iterations; counter++) {
if (a2dp_ldac_encoder_cb.has_ldac_abr_handle) {
int flag_enable = 1;
int prev_eqmid = a2dp_ldac_encoder_cb.last_ldac_abr_eqmid;
a2dp_ldac_encoder_cb.last_ldac_abr_eqmid =
a2dp_ldac_abr_proc(a2dp_ldac_encoder_cb.ldac_handle,
a2dp_ldac_encoder_cb.ldac_abr_handle,
a2dp_ldac_encoder_cb.TxQueueLength, flag_enable);
if (prev_eqmid != a2dp_ldac_encoder_cb.last_ldac_abr_eqmid)
a2dp_ldac_encoder_cb.ldac_abr_adjustments++;
#ifndef OS_GENERIC
ATRACE_INT("LDAC ABR level", a2dp_ldac_encoder_cb.last_ldac_abr_eqmid);
#endif
}
// Transcode frame and enqueue
a2dp_ldac_encode_frames(nb_frame);
}
}
// Obtains the number of frames to send and number of iterations
// to be used. |num_of_iterations| and |num_of_frames| parameters
// are used as output param for returning the respective values.
static void a2dp_ldac_get_num_frame_iteration(uint8_t* num_of_iterations,
uint8_t* num_of_frames,
uint64_t timestamp_us) {
uint32_t result = 0;
uint8_t nof = 0;
uint8_t noi = 1;
uint32_t pcm_bytes_per_frame =
A2DP_LDAC_MEDIA_BYTES_PER_FRAME *
a2dp_ldac_encoder_cb.feeding_params.channel_count *
a2dp_ldac_encoder_cb.feeding_params.bits_per_sample / 8;
LOG_VERBOSE(LOG_TAG, "%s: pcm_bytes_per_frame %u", __func__,
pcm_bytes_per_frame);
uint32_t us_this_tick = A2DP_LDAC_ENCODER_INTERVAL_MS * 1000;
uint64_t now_us = timestamp_us;
if (a2dp_ldac_encoder_cb.ldac_feeding_state.last_frame_us != 0)
us_this_tick =
(now_us - a2dp_ldac_encoder_cb.ldac_feeding_state.last_frame_us);
a2dp_ldac_encoder_cb.ldac_feeding_state.last_frame_us = now_us;
a2dp_ldac_encoder_cb.ldac_feeding_state.counter +=
a2dp_ldac_encoder_cb.ldac_feeding_state.bytes_per_tick * us_this_tick /
(A2DP_LDAC_ENCODER_INTERVAL_MS * 1000);
result =
a2dp_ldac_encoder_cb.ldac_feeding_state.counter / pcm_bytes_per_frame;
a2dp_ldac_encoder_cb.ldac_feeding_state.counter -=
result * pcm_bytes_per_frame;
nof = result;
LOG_VERBOSE(LOG_TAG, "%s: effective num of frames %u, iterations %u",
__func__, nof, noi);
*num_of_frames = nof;
*num_of_iterations = noi;
}
static void a2dp_ldac_encode_frames(uint8_t nb_frame) {
tA2DP_LDAC_ENCODER_PARAMS* p_encoder_params =
&a2dp_ldac_encoder_cb.ldac_encoder_params;
uint8_t remain_nb_frame = nb_frame;
uint16_t ldac_frame_size;
uint8_t read_buffer[LDACBT_MAX_LSU * 4 /* byte/sample */ * 2 /* ch */];
switch (p_encoder_params->sample_rate) {
case 176400:
case 192000:
ldac_frame_size = 512; // sample/ch
break;
case 88200:
case 96000:
ldac_frame_size = 256; // sample/ch
break;
case 44100:
case 48000:
default:
ldac_frame_size = 128; // sample/ch
break;
}
uint32_t count;
int32_t encode_count = 0;
int32_t out_frames = 0;
int written = 0;
while (nb_frame) {
BT_HDR* p_buf = (BT_HDR*)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
p_buf->offset = A2DP_LDAC_OFFSET;
p_buf->len = 0;
p_buf->layer_specific = 0;
a2dp_ldac_encoder_cb.stats.media_read_total_expected_packets++;
count = 0;
do {
//
// Read the PCM data and encode it
//
if (a2dp_ldac_read_feeding(read_buffer)) {
uint8_t* packet = (uint8_t*)(p_buf + 1) + p_buf->offset + p_buf->len;
if (a2dp_ldac_encoder_cb.ldac_handle == NULL) {
LOG_ERROR(LOG_TAG, "%s: invalid LDAC handle", __func__);
a2dp_ldac_encoder_cb.stats.media_read_total_dropped_packets++;
osi_free(p_buf);
return;
}
int result = ldac_encode_func(
a2dp_ldac_encoder_cb.ldac_handle, read_buffer, (int*)&encode_count,
packet + count, (int*)&written, (int*)&out_frames);
if (result != 0) {
int err_code =
ldac_get_error_code_func(a2dp_ldac_encoder_cb.ldac_handle);
LOG_ERROR(LOG_TAG,
"%s: LDAC encoding error: %d api_error = %d "
"handle_error = %d block_error = %d",
__func__, result, LDACBT_API_ERR(err_code),
LDACBT_HANDLE_ERR(err_code), LDACBT_BLOCK_ERR(err_code));
a2dp_ldac_encoder_cb.stats.media_read_total_dropped_packets++;
osi_free(p_buf);
return;
}
count += written;
p_buf->len += written;
nb_frame--;
p_buf->layer_specific += out_frames; // added a frame to the buffer
} else {
LOG_WARN(LOG_TAG, "%s: underflow %d", __func__, nb_frame);
a2dp_ldac_encoder_cb.ldac_feeding_state.counter +=
nb_frame * LDACBT_ENC_LSU *
a2dp_ldac_encoder_cb.feeding_params.channel_count *
a2dp_ldac_encoder_cb.feeding_params.bits_per_sample / 8;
// no more pcm to read
nb_frame = 0;
}
} while ((written == 0) && nb_frame);
if (p_buf->len) {
/*
* Timestamp of the media packet header represent the TS of the
* first frame, i.e the timestamp before including this frame.
*/
*((uint32_t*)(p_buf + 1)) = a2dp_ldac_encoder_cb.timestamp;
a2dp_ldac_encoder_cb.timestamp += p_buf->layer_specific * ldac_frame_size;
uint8_t done_nb_frame = remain_nb_frame - nb_frame;
remain_nb_frame = nb_frame;
if (!a2dp_ldac_encoder_cb.enqueue_callback(p_buf, done_nb_frame)) return;
} else {
// NOTE: Unlike the execution path for other codecs, it is normal for
// LDAC to NOT write encoded data to the last buffer if there wasn't
// enough data to write to. That data is accumulated internally by
// the codec and included in the next iteration. Therefore, here we
// don't increment the "media_read_total_dropped_packets" counter.
osi_free(p_buf);
}
}
}
static bool a2dp_ldac_read_feeding(uint8_t* read_buffer) {
uint32_t read_size = LDACBT_ENC_LSU *
a2dp_ldac_encoder_cb.feeding_params.channel_count *
a2dp_ldac_encoder_cb.feeding_params.bits_per_sample / 8;
a2dp_ldac_encoder_cb.stats.media_read_total_expected_reads_count++;
a2dp_ldac_encoder_cb.stats.media_read_total_expected_read_bytes += read_size;
/* Read Data from UIPC channel */
uint32_t nb_byte_read =
a2dp_ldac_encoder_cb.read_callback(read_buffer, read_size);
a2dp_ldac_encoder_cb.stats.media_read_total_actual_read_bytes += nb_byte_read;
if (nb_byte_read < read_size) {
if (nb_byte_read == 0) return false;
/* Fill the unfilled part of the read buffer with silence (0) */
memset(((uint8_t*)read_buffer) + nb_byte_read, 0, read_size - nb_byte_read);
nb_byte_read = read_size;
}
a2dp_ldac_encoder_cb.stats.media_read_total_actual_reads_count++;
return true;
}
static std::string quality_mode_index_to_name(int quality_mode_index) {
switch (quality_mode_index) {
case A2DP_LDAC_QUALITY_HIGH:
return "HIGH";
case A2DP_LDAC_QUALITY_MID:
return "MID";
case A2DP_LDAC_QUALITY_LOW:
return "LOW";
case A2DP_LDAC_QUALITY_ABR:
return "ABR";
default:
return "Unknown";
}
}
void a2dp_vendor_ldac_set_transmit_queue_length(size_t transmit_queue_length) {
a2dp_ldac_encoder_cb.TxQueueLength = transmit_queue_length;
}
period_ms_t A2dpCodecConfigLdac::encoderIntervalMs() const {
return a2dp_vendor_ldac_get_encoder_interval_ms();
}
void A2dpCodecConfigLdac::debug_codec_dump(int fd) {
a2dp_ldac_encoder_stats_t* stats = &a2dp_ldac_encoder_cb.stats;
tA2DP_LDAC_ENCODER_PARAMS* p_encoder_params =
&a2dp_ldac_encoder_cb.ldac_encoder_params;
A2dpCodecConfig::debug_codec_dump(fd);
dprintf(fd,
" Packet counts (expected/dropped) : %zu / "
"%zu\n",
stats->media_read_total_expected_packets,
stats->media_read_total_dropped_packets);
dprintf(fd,
" PCM read counts (expected/actual) : %zu / "
"%zu\n",
stats->media_read_total_expected_reads_count,
stats->media_read_total_actual_reads_count);
dprintf(fd,
" PCM read bytes (expected/actual) : %zu / "
"%zu\n",
stats->media_read_total_expected_read_bytes,
stats->media_read_total_actual_read_bytes);
dprintf(
fd, " LDAC quality mode : %s\n",
quality_mode_index_to_name(p_encoder_params->quality_mode_index).c_str());
dprintf(fd,
" LDAC transmission bitrate (Kbps) : %d\n",
ldac_get_bitrate_func(a2dp_ldac_encoder_cb.ldac_handle));
dprintf(fd,
" LDAC saved transmit queue length : %zu\n",
a2dp_ldac_encoder_cb.TxQueueLength);
if (a2dp_ldac_encoder_cb.has_ldac_abr_handle) {
dprintf(fd,
" LDAC adaptive bit rate encode quality mode index : %d\n",
a2dp_ldac_encoder_cb.last_ldac_abr_eqmid);
dprintf(fd,
" LDAC adaptive bit rate adjustments : %zu\n",
a2dp_ldac_encoder_cb.ldac_abr_adjustments);
}
}