int transcode_audio_new( sout_stream_t *p_stream,
sout_stream_id_t *id )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
audio_sample_format_t fmt_last;
/*
* Open decoder
*/
/* Initialization of decoder structures */
id->p_decoder->fmt_out = id->p_decoder->fmt_in;
id->p_decoder->fmt_out.i_extra = 0;
id->p_decoder->fmt_out.p_extra = 0;
id->p_decoder->pf_decode_audio = NULL;
id->p_decoder->pf_aout_format_update = audio_update_format;
/* id->p_decoder->p_cfg = p_sys->p_audio_cfg; */
id->p_decoder->p_module =
module_need( id->p_decoder, "decoder", "$codec", false );
if( !id->p_decoder->p_module )
{
msg_Err( p_stream, "cannot find audio decoder" );
return VLC_EGENERIC;
}
/* decoders don't set audio.i_format, but audio filters use it */
id->p_decoder->fmt_out.audio.i_format = id->p_decoder->fmt_out.i_codec;
aout_FormatPrepare( &id->p_decoder->fmt_out.audio );
fmt_last = id->p_decoder->fmt_out.audio;
/* Fix AAC SBR changing number of channels and sampling rate */
if( !(id->p_decoder->fmt_in.i_codec == VLC_CODEC_MP4A &&
fmt_last.i_rate != id->p_encoder->fmt_in.audio.i_rate &&
fmt_last.i_channels != id->p_encoder->fmt_in.audio.i_channels) )
fmt_last.i_rate = id->p_decoder->fmt_in.audio.i_rate;
/*
* Open encoder
*/
if( transcode_audio_initialize_encoder( id, p_stream ) == VLC_EGENERIC )
return VLC_EGENERIC;
if( unlikely( transcode_audio_initialize_filters( p_stream, id, p_sys, &fmt_last ) != VLC_SUCCESS ) )
return VLC_EGENERIC;
return VLC_SUCCESS;
}
int transcode_audio_new( sout_stream_t *p_stream,
sout_stream_id_t *id )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
audio_sample_format_t fmt_last;
/*
* Open decoder
*/
/* Initialization of decoder structures */
id->p_decoder->fmt_out = id->p_decoder->fmt_in;
id->p_decoder->fmt_out.i_extra = 0;
id->p_decoder->fmt_out.p_extra = 0;
id->p_decoder->pf_decode_audio = NULL;
id->p_decoder->pf_aout_format_update = audio_update_format;
/* id->p_decoder->p_cfg = p_sys->p_audio_cfg; */
id->p_decoder->p_module =
module_need( id->p_decoder, "decoder", "$codec", false );
if( !id->p_decoder->p_module )
{
msg_Err( p_stream, "cannot find audio decoder" );
return VLC_EGENERIC;
}
/* decoders don't set audio.i_format, but audio filters use it */
id->p_decoder->fmt_out.audio.i_format = id->p_decoder->fmt_out.i_codec;
aout_FormatPrepare( &id->p_decoder->fmt_out.audio );
fmt_last = id->p_decoder->fmt_out.audio;
/* Fix AAC SBR changing number of channels and sampling rate */
if( !(id->p_decoder->fmt_in.i_codec == VLC_CODEC_MP4A &&
fmt_last.i_rate != id->p_encoder->fmt_in.audio.i_rate &&
fmt_last.i_channels != id->p_encoder->fmt_in.audio.i_channels) )
fmt_last.i_rate = id->p_decoder->fmt_in.audio.i_rate;
/*
* Open encoder
*/
/* Initialization of encoder format structures */
es_format_Init( &id->p_encoder->fmt_in, id->p_decoder->fmt_in.i_cat,
id->p_decoder->fmt_out.i_codec );
id->p_encoder->fmt_in.audio.i_format = id->p_decoder->fmt_out.i_codec;
id->p_encoder->fmt_in.audio.i_rate = id->p_encoder->fmt_out.audio.i_rate;
id->p_encoder->fmt_in.audio.i_physical_channels =
id->p_encoder->fmt_out.audio.i_physical_channels;
aout_FormatPrepare( &id->p_encoder->fmt_in.audio );
id->p_encoder->p_cfg = p_stream->p_sys->p_audio_cfg;
id->p_encoder->p_module =
module_need( id->p_encoder, "encoder", p_sys->psz_aenc, true );
if( !id->p_encoder->p_module )
{
msg_Err( p_stream, "cannot find audio encoder (module:%s fourcc:%4.4s). Take a look few lines earlier to see possible reason.",
p_sys->psz_aenc ? p_sys->psz_aenc : "any",
(char *)&p_sys->i_acodec );
module_unneed( id->p_decoder, id->p_decoder->p_module );
id->p_decoder->p_module = NULL;
return VLC_EGENERIC;
}
id->p_encoder->fmt_out.i_codec =
vlc_fourcc_GetCodec( AUDIO_ES, id->p_encoder->fmt_out.i_codec );
/* Fix input format */
id->p_encoder->fmt_in.audio.i_format = id->p_encoder->fmt_in.i_codec;
if( !id->p_encoder->fmt_in.audio.i_physical_channels
|| !id->p_encoder->fmt_in.audio.i_original_channels )
{
if( id->p_encoder->fmt_in.audio.i_channels < 6 )
id->p_encoder->fmt_in.audio.i_physical_channels =
id->p_encoder->fmt_in.audio.i_original_channels =
pi_channels_maps[id->p_encoder->fmt_in.audio.i_channels];
}
aout_FormatPrepare( &id->p_encoder->fmt_in.audio );
if( unlikely( transcode_audio_initialize_filters( p_stream, id, p_sys, &fmt_last ) != VLC_SUCCESS ) )
return VLC_EGENERIC;
return VLC_SUCCESS;
}
int transcode_audio_process( sout_stream_t *p_stream,
sout_stream_id_t *id,
block_t *in, block_t **out )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
block_t *p_block, *p_audio_buf;
*out = NULL;
if( unlikely( in == NULL ) )
{
block_t *p_block;
do {
p_block = id->p_encoder->pf_encode_audio(id->p_encoder, NULL );
block_ChainAppend( out, p_block );
} while( p_block );
return VLC_SUCCESS;
}
while( (p_audio_buf = id->p_decoder->pf_decode_audio( id->p_decoder,
&in )) )
{
if( p_sys->b_master_sync )
{
mtime_t i_pts = date_Get( &id->interpolated_pts ) + 1;
mtime_t i_drift = 0;
if( likely( p_audio_buf->i_pts != VLC_TS_INVALID ) )
i_drift = p_audio_buf->i_pts - i_pts;
if ( unlikely(i_drift > MASTER_SYNC_MAX_DRIFT
|| i_drift < -MASTER_SYNC_MAX_DRIFT) )
{
msg_Dbg( p_stream,
"audio drift is too high (%"PRId64"), resetting master sync",
i_drift );
date_Set( &id->interpolated_pts, p_audio_buf->i_pts );
i_pts = p_audio_buf->i_pts + 1;
}
if( likely(p_audio_buf->i_pts != VLC_TS_INVALID ) )
p_sys->i_master_drift = p_audio_buf->i_pts - i_pts;
date_Increment( &id->interpolated_pts, p_audio_buf->i_nb_samples );
p_audio_buf->i_pts = i_pts;
}
p_audio_buf->i_dts = p_audio_buf->i_pts;
/* Check if audio format has changed, and filters need reinit */
if( unlikely( ( id->p_decoder->fmt_out.audio.i_rate != p_sys->fmt_audio.i_rate ) ||
( id->p_decoder->fmt_out.audio.i_physical_channels != p_sys->fmt_audio.i_physical_channels ) ) )
{
msg_Info( p_stream, "Audio changed, trying to reinitialize filters" );
if( id->p_af_chain != NULL )
aout_FiltersDelete( (vlc_object_t *)NULL, id->p_af_chain );
/* decoders don't set audio.i_format, but audio filters use it */
id->p_decoder->fmt_out.audio.i_format = id->p_decoder->fmt_out.i_codec;
aout_FormatPrepare( &id->p_decoder->fmt_out.audio );
if( transcode_audio_initialize_filters( p_stream, id, p_sys, &id->p_decoder->fmt_out.audio ) != VLC_SUCCESS )
return VLC_EGENERIC;
}
/* Run filter chain */
p_audio_buf = aout_FiltersPlay( id->p_af_chain, p_audio_buf,
INPUT_RATE_DEFAULT );
if( !p_audio_buf )
abort();
p_audio_buf->i_dts = p_audio_buf->i_pts;
p_block = id->p_encoder->pf_encode_audio( id->p_encoder, p_audio_buf );
block_ChainAppend( out, p_block );
block_Release( p_audio_buf );
}
return VLC_SUCCESS;
}
