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FS-6947 Opus RTP payload fmtp settings ( maxaveragebitrate / maxplaybackrate )

This commit is contained in:
Julien Chavanton 2014-11-12 09:06:11 +01:00
parent c79360c596
commit 0eefdca47b
1 changed files with 48 additions and 46 deletions
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76
src/mod/codecs/mod_opus/mod_opus.c
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@ -42,6 +42,7 @@ struct opus_codec_settings {
int useinbandfec;
int usedtx;
int maxaveragebitrate;
int maxplaybackrate;
int stereo;
int cbr;
int sprop_maxcapturerate;
@ -57,6 +58,7 @@ static opus_codec_settings_t default_codec_settings = {
/*.useinbandfec */ 1,
/*.usedtx */ 1,
/*.maxaveragebitrate */ 30000,
/*.maxplaybackrate */ 48000,
/*.stereo*/ 0,
/*.cbr*/ 0,
/*.sprop_maxcapturerate*/ 0,
@ -151,52 +153,23 @@ static switch_status_t switch_opus_fmtp_parse(const char *fmtp, switch_codec_fmt
if (!strcasecmp(data, "maxaveragebitrate")) {
codec_settings->maxaveragebitrate = atoi(arg);
switch(codec_fmtp->actual_samples_per_second) {
case 8000:
{
if(codec_settings->maxaveragebitrate < 6000 || codec_settings->maxaveragebitrate > 20000) {
codec_settings->maxaveragebitrate = 20000;
if ( codec_settings->maxaveragebitrate < 6000 || codec_settings->maxaveragebitrate > 510000 ) {
codec_settings->maxaveragebitrate = 0; /* values outside the range between 6000 and 510000 SHOULD be ignored */
}
break;
}
case 12000:
{
if(codec_settings->maxaveragebitrate < 7000 || codec_settings->maxaveragebitrate > 25000) {
codec_settings->maxaveragebitrate = 25000;
}
break;
}
case 16000:
{
if(codec_settings->maxaveragebitrate < 8000 || codec_settings->maxaveragebitrate > 30000) {
codec_settings->maxaveragebitrate = 30000;
}
break;
}
case 24000:
{
if(codec_settings->maxaveragebitrate < 12000 || codec_settings->maxaveragebitrate > 40000) {
codec_settings->maxaveragebitrate = 40000;
}
break;
}
default:
/* this should never happen but 20000 is common among all rates */
codec_settings->maxaveragebitrate = 20000;
break;
if (!strcasecmp(data, "maxplaybackrate")) {
codec_settings->maxplaybackrate = atoi(arg);
if ( codec_settings->maxplaybackrate != 8000 && codec_settings->maxplaybackrate != 12000 && codec_settings->maxplaybackrate != 16000
&& codec_settings->maxplaybackrate != 24000 && codec_settings->maxplaybackrate != 48000) {
codec_settings->maxplaybackrate = 0; /* value not supported */
}
codec_fmtp->bits_per_second = codec_settings->maxaveragebitrate;
}
}
}
}
free(fmtp_dup);
}
//codec_fmtp->bits_per_second = bit_rate;
return SWITCH_STATUS_SUCCESS;
}
return SWITCH_STATUS_FALSE;
@ -216,7 +189,10 @@ static char *gen_fmtp(opus_codec_settings_t *settings, switch_memory_pool_t *poo
if (settings->maxaveragebitrate) {
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "maxaveragebitrate=%d; ", settings->maxaveragebitrate);
}
if (settings->maxplaybackrate) {
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "maxplaybackrate=%d; ", settings->maxplaybackrate);
}
if (settings->ptime) {
@ -283,14 +259,40 @@ static switch_status_t switch_opus_init(switch_codec_t *codec, switch_codec_flag
return SWITCH_STATUS_GENERR;
}
opus_encoder_ctl(context->encoder_object, OPUS_SET_BITRATE(bitrate_bps));
/* Setting documented in "RTP Payload Format for Opus Speech and Audio Codec" draft-spittka-payload-rtp-opus-03 */
if( opus_codec_settings.maxaveragebitrate ) { /* Remote codec settings found in SDP "fmtp", we accept to tune the Encoder */
opus_encoder_ctl(context->encoder_object, OPUS_SET_BITRATE(opus_codec_settings.maxaveragebitrate));
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Opus encoder set bitrate based on maxaveragebitrate found in SDP [%dbps]\n", opus_codec_settings.maxaveragebitrate);
} else {
/* Default codec settings used, may have been modified by SDP "samplerate" */
opus_encoder_ctl(context->encoder_object, OPUS_SET_BITRATE(bitrate_bps));
if (codec->implementation->actual_samples_per_second == 8000) {
opus_encoder_ctl(context->encoder_object, OPUS_SET_BANDWIDTH(OPUS_BANDWIDTH_NARROWBAND));
opus_encoder_ctl(context->encoder_object, OPUS_SET_MAX_BANDWIDTH(OPUS_BANDWIDTH_NARROWBAND));
} else {
opus_encoder_ctl(context->encoder_object, OPUS_SET_BANDWIDTH(OPUS_BANDWIDTH_FULLBAND));
}
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Opus encoder set bitrate to local settings [%dbps]\n", bitrate_bps);
}
/* Another setting from "RTP Payload Format for Opus Speech and Audio Codec" */
if ( opus_codec_settings.maxplaybackrate ) {
if (opus_codec_settings.maxplaybackrate == 8000) { /* Audio Bandwidth: 0-4000Hz Sampling Rate: 8000Hz */
opus_encoder_ctl(context->encoder_object, OPUS_SET_MAX_BANDWIDTH(OPUS_BANDWIDTH_NARROWBAND));
} else if (opus_codec_settings.maxplaybackrate == 12000) { /* Audio Bandwidth: 0-6000Hz Sampling Rate: 12000Hz */
opus_encoder_ctl(context->encoder_object, OPUS_SET_MAX_BANDWIDTH(OPUS_BANDWIDTH_MEDIUMBAND));
} else if (opus_codec_settings.maxplaybackrate == 16000) { /* Audio Bandwidth: 0-8000Hz Sampling Rate: 16000Hz */
opus_encoder_ctl(context->encoder_object, OPUS_SET_MAX_BANDWIDTH(OPUS_BANDWIDTH_WIDEBAND));
} else if (opus_codec_settings.maxplaybackrate == 24000) { /* Audio Bandwidth: 0-12000Hz Sampling Rate: 24000Hz */
opus_encoder_ctl(context->encoder_object, OPUS_SET_MAX_BANDWIDTH(OPUS_BANDWIDTH_SUPERWIDEBAND));
} else if (opus_codec_settings.maxplaybackrate == 48000) { /* Audio Bandwidth: 0-20000Hz Sampling Rate: 48000Hz */
opus_encoder_ctl(context->encoder_object, OPUS_SET_MAX_BANDWIDTH(OPUS_BANDWIDTH_FULLBAND));
}
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Opus encoder set bandwidth based on maxplaybackrate found in SDP [%dHz]\n", opus_codec_settings.maxplaybackrate);
}
if (use_vbr) {
opus_encoder_ctl(context->encoder_object, OPUS_SET_VBR(use_vbr));