/*******************************************************************************
**
** Function bta_av_co_audio_get_sbc_config
**
** Description Retrieves the SBC codec configuration. If the codec in use
** is not SBC, return the default SBC codec configuration.
**
** Returns TRUE if codec is SBC, FALSE otherwise
**
*******************************************************************************/
BOOLEAN bta_av_co_audio_get_sbc_config(tA2D_SBC_CIE *p_sbc_config, UINT16 *p_minmtu)
{
BOOLEAN result = FALSE;
UINT8 index, jndex;
tBTA_AV_CO_PEER *p_peer;
tBTA_AV_CO_SINK *p_sink;
APPL_TRACE_EVENT1("bta_av_co_cb.codec_cfg.id : codec 0x%x", bta_av_co_cb.codec_cfg.id);
/* Minimum MTU is by default very large */
*p_minmtu = 0xFFFF;
GKI_disable();
if (bta_av_co_cb.codec_cfg.id == BTIF_AV_CODEC_SBC)
{
if (A2D_ParsSbcInfo(p_sbc_config, bta_av_co_cb.codec_cfg.info, FALSE) == A2D_SUCCESS)
{
for (index = 0; index < BTA_AV_CO_NUM_ELEMENTS(bta_av_co_cb.peers); index++)
{
p_peer = &bta_av_co_cb.peers[index];
if (p_peer->opened)
{
if (p_peer->mtu < *p_minmtu)
{
*p_minmtu = p_peer->mtu;
}
for (jndex = 0; jndex < p_peer->num_sup_snks; jndex++)
{
p_sink = &p_peer->snks[jndex];
if (p_sink->codec_type == A2D_MEDIA_CT_SBC)
{
/* Update the bitpool boundaries of the current config */
p_sbc_config->min_bitpool =
BTA_AV_CO_MAX(p_sink->codec_caps[BTA_AV_CO_SBC_MIN_BITPOOL_OFF],
p_sbc_config->min_bitpool);
p_sbc_config->max_bitpool =
BTA_AV_CO_MIN(p_sink->codec_caps[BTA_AV_CO_SBC_MAX_BITPOOL_OFF],
p_sbc_config->max_bitpool);
APPL_TRACE_EVENT2("bta_av_co_audio_get_sbc_config : sink bitpool min %d, max %d",
p_sbc_config->min_bitpool, p_sbc_config->max_bitpool);
break;
}
}
}
}
result = TRUE;
}
}
if (!result)
{
/* Not SBC, still return the default values */
*p_sbc_config = btif_av_sbc_default_config;
}
GKI_enable();
return result;
}
/*******************************************************************************
**
** Function btc_a2dp_sink_handle_decoder_reset
**
** Description
**
** Returns void
**
*******************************************************************************/
static void btc_a2dp_sink_handle_decoder_reset(tBTC_MEDIA_SINK_CFG_UPDATE *p_msg)
{
tBTC_MEDIA_SINK_CFG_UPDATE *p_buf = p_msg;
tA2D_STATUS a2d_status;
tA2D_SBC_CIE sbc_cie;
OI_STATUS status;
UINT32 freq_multiple = 48 * 20; /* frequency multiple for 20ms of data , initialize with 48K*/
UINT32 num_blocks = 16;
UINT32 num_subbands = 8;
APPL_TRACE_EVENT("%s p_codec_info[%x:%x:%x:%x:%x:%x]\n", __FUNCTION__,
p_buf->codec_info[1], p_buf->codec_info[2], p_buf->codec_info[3],
p_buf->codec_info[4], p_buf->codec_info[5], p_buf->codec_info[6]);
a2d_status = A2D_ParsSbcInfo(&sbc_cie, p_buf->codec_info, FALSE);
if (a2d_status != A2D_SUCCESS) {
APPL_TRACE_ERROR("ERROR dump_codec_info A2D_ParsSbcInfo fail:%d\n", a2d_status);
return;
}
btc_aa_snk_cb.sample_rate = btc_a2dp_sink_get_track_frequency(sbc_cie.samp_freq);
btc_aa_snk_cb.channel_count = btc_a2dp_sink_get_track_channel_count(sbc_cie.ch_mode);
btc_aa_snk_cb.rx_flush = FALSE;
APPL_TRACE_EVENT("Reset to sink role");
status = OI_CODEC_SBC_DecoderReset(&context, contextData, sizeof(contextData), 2, 2, FALSE);
if (!OI_SUCCESS(status)) {
APPL_TRACE_ERROR("OI_CODEC_SBC_DecoderReset failed with error code %d\n", status);
}
btc_a2dp_control_set_datachnl_stat(TRUE);
switch (sbc_cie.samp_freq) {
case A2D_SBC_IE_SAMP_FREQ_16:
APPL_TRACE_DEBUG("\tsamp_freq:%d (16000)\n", sbc_cie.samp_freq);
freq_multiple = 16 * 20;
break;
case A2D_SBC_IE_SAMP_FREQ_32:
APPL_TRACE_DEBUG("\tsamp_freq:%d (32000)\n", sbc_cie.samp_freq);
freq_multiple = 32 * 20;
break;
case A2D_SBC_IE_SAMP_FREQ_44:
APPL_TRACE_DEBUG("\tsamp_freq:%d (44100)\n", sbc_cie.samp_freq);
freq_multiple = 441 * 2;
break;
case A2D_SBC_IE_SAMP_FREQ_48:
APPL_TRACE_DEBUG("\tsamp_freq:%d (48000)\n", sbc_cie.samp_freq);
freq_multiple = 48 * 20;
break;
default:
APPL_TRACE_DEBUG(" Unknown Frequency ");
break;
}
switch (sbc_cie.ch_mode) {
case A2D_SBC_IE_CH_MD_MONO:
APPL_TRACE_DEBUG("\tch_mode:%d (Mono)\n", sbc_cie.ch_mode);
break;
case A2D_SBC_IE_CH_MD_DUAL:
APPL_TRACE_DEBUG("\tch_mode:%d (DUAL)\n", sbc_cie.ch_mode);
break;
case A2D_SBC_IE_CH_MD_STEREO:
APPL_TRACE_DEBUG("\tch_mode:%d (STEREO)\n", sbc_cie.ch_mode);
break;
case A2D_SBC_IE_CH_MD_JOINT:
APPL_TRACE_DEBUG("\tch_mode:%d (JOINT)\n", sbc_cie.ch_mode);
break;
default:
APPL_TRACE_DEBUG(" Unknown Mode ");
break;
}
switch (sbc_cie.block_len) {
case A2D_SBC_IE_BLOCKS_4:
APPL_TRACE_DEBUG("\tblock_len:%d (4)\n", sbc_cie.block_len);
num_blocks = 4;
break;
case A2D_SBC_IE_BLOCKS_8:
APPL_TRACE_DEBUG("\tblock_len:%d (8)\n", sbc_cie.block_len);
num_blocks = 8;
break;
case A2D_SBC_IE_BLOCKS_12:
APPL_TRACE_DEBUG("\tblock_len:%d (12)\n", sbc_cie.block_len);
num_blocks = 12;
break;
case A2D_SBC_IE_BLOCKS_16:
APPL_TRACE_DEBUG("\tblock_len:%d (16)\n", sbc_cie.block_len);
num_blocks = 16;
break;
default:
APPL_TRACE_DEBUG(" Unknown BlockLen ");
break;
}
switch (sbc_cie.num_subbands) {
case A2D_SBC_IE_SUBBAND_4:
APPL_TRACE_DEBUG("\tnum_subbands:%d (4)\n", sbc_cie.num_subbands);
num_subbands = 4;
break;
case A2D_SBC_IE_SUBBAND_8:
APPL_TRACE_DEBUG("\tnum_subbands:%d (8)\n", sbc_cie.num_subbands);
num_subbands = 8;
break;
default:
APPL_TRACE_DEBUG(" Unknown SubBands ");
break;
}
switch (sbc_cie.alloc_mthd) {
case A2D_SBC_IE_ALLOC_MD_S:
APPL_TRACE_DEBUG("\talloc_mthd:%d (SNR)\n", sbc_cie.alloc_mthd);
break;
case A2D_SBC_IE_ALLOC_MD_L:
APPL_TRACE_DEBUG("\talloc_mthd:%d (Loudness)\n", sbc_cie.alloc_mthd);
break;
default:
APPL_TRACE_DEBUG(" Unknown Allocation Method");
break;
}
APPL_TRACE_EVENT("\tBit pool Min:%d Max:%d\n", sbc_cie.min_bitpool, sbc_cie.max_bitpool);
int frames_to_process = ((freq_multiple) / (num_blocks * num_subbands)) + 1;
APPL_TRACE_EVENT(" Frames to be processed in 20 ms %d\n", frames_to_process);
}