Skip to content

V
vlc-gpu
Commit 48318a70 authored by Laurent Aimar's avatar Laurent Aimar
Browse files
Options

Fixed audio transcoding when channel mixing or resampling is needed.

parent b15994bd
Hide whitespace changes
Inline Side-by-side
Showing with 123 additions and 122 deletions
modules/stream_out/transcode.c
View file @ 48318a70
......@@ -1056,12 +1056,107 @@ static int transcode_audio_filter_allocation_init( filter_t *p_filter,
return VLC_SUCCESS;
}
static bool transcode_audio_filter_needed( const es_format_t *p_fmt1, const es_format_t *p_fmt2 )
{
if( p_fmt1->i_codec != p_fmt2->i_codec ||
p_fmt1->audio.i_channels != p_fmt2->audio.i_channels ||
p_fmt1->audio.i_rate != p_fmt2->audio.i_rate )
return true;
return false;
}
static int transcode_audio_filter_chain_build( sout_stream_t *p_stream, filter_chain_t *p_chain,
const es_format_t *p_dst, const es_format_t *p_src )
{
if( !transcode_audio_filter_needed( p_dst, p_src ) )
return VLC_SUCCESS;
es_format_t current = *p_src;
msg_Dbg( p_stream, "Looking for filter "
"(%4.4s->%4.4s, channels %d->%d, rate %d->%d)",
(const char *)&p_src->i_codec,
(const char *)&p_dst->i_codec,
p_src->audio.i_channels,
p_dst->audio.i_channels,
p_src->audio.i_rate,
p_dst->audio.i_rate );
/* If any filter is needed, convert to fl32 */
if( current.i_codec != VLC_FOURCC('f','l','3','2') )
{
/* First step, convert to fl32 */
current.i_codec =
current.audio.i_format = VLC_FOURCC('f','l','3','2');
if( !filter_chain_AppendFilter( p_chain, NULL, NULL, NULL, &current ) )
{
msg_Err( p_stream, "Failed to find conversion filter to fl32" );
return VLC_EGENERIC;
}
current = *filter_chain_GetFmtOut( p_chain );
}
/* Fix sample rate */
if( current.audio.i_rate != p_dst->audio.i_rate )
{
current.audio.i_rate = p_dst->audio.i_rate;
if( !filter_chain_AppendFilter( p_chain, NULL, NULL, NULL, &current ) )
{
msg_Err( p_stream, "Failed to find conversion filter for resampling" );
return VLC_EGENERIC;
}
current = *filter_chain_GetFmtOut( p_chain );
}
/* Fix channels */
if( current.audio.i_channels != p_dst->audio.i_channels )
{
current.audio.i_channels = p_dst->audio.i_channels;
current.audio.i_physical_channels = p_dst->audio.i_physical_channels;
current.audio.i_original_channels = p_dst->audio.i_original_channels;
if( ( !current.audio.i_physical_channels || !current.audio.i_original_channels ) &&
current.audio.i_channels < 6 )
current.audio.i_physical_channels =
current.audio.i_original_channels = pi_channels_maps[current.audio.i_channels];
if( !filter_chain_AppendFilter( p_chain, NULL, NULL, NULL, &current ) )
{
msg_Err( p_stream, "Failed to find conversion filter for channel mixing" );
return VLC_EGENERIC;
}
current = *filter_chain_GetFmtOut( p_chain );
}
/* And last step, convert to the requested codec */
if( current.i_codec != p_dst->i_codec )
{
current.i_codec = p_dst->i_codec;
if( !filter_chain_AppendFilter( p_chain, NULL, NULL, NULL, &current ) )
{
msg_Err( p_stream, "Failed to find conversion filter to %4.4s",
(const char*)&p_dst->i_codec);
return VLC_EGENERIC;
}
current = *filter_chain_GetFmtOut( p_chain );
}
if( transcode_audio_filter_needed( p_dst, &current ) )
{
/* Weird case, a filter has side effects, doomed */
msg_Err( p_stream, "Failed to create a valid audio filter chain" );
return VLC_EGENERIC;
}
msg_Dbg( p_stream, "Got complete audio filter chain" );
return VLC_SUCCESS;
}
static int transcode_audio_new( sout_stream_t *p_stream,
sout_stream_id_t *id )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
es_format_t fmt_last;
int i;
/*
* Open decoder
......@@ -1127,137 +1222,39 @@ static int transcode_audio_new( sout_stream_t *p_stream,
id->p_encoder->fmt_in.audio.i_bitspersample =
aout_BitsPerSample( id->p_encoder->fmt_in.i_codec );
/* Init filter chain */
id->p_f_chain = filter_chain_New( p_stream, "audio filter2", true,
transcode_audio_filter_allocation_init, NULL, NULL );
filter_chain_Reset( id->p_f_chain, &fmt_last, &id->p_encoder->fmt_in );
/* Load conversion filters */
if( fmt_last.audio.i_channels != id->p_encoder->fmt_in.audio.i_channels ||
fmt_last.audio.i_rate != id->p_encoder->fmt_in.audio.i_rate )
{
/* We'll have to go through fl32 first */
fmt_last.i_codec = fmt_last.audio.i_format = VLC_FOURCC('f','l','3','2');
fmt_last.audio.i_bitspersample = aout_BitsPerSample( fmt_last.i_codec );
filter_chain_AppendFilter( id->p_f_chain, NULL, NULL, NULL, &fmt_last );
fmt_last = *filter_chain_GetFmtOut( id->p_f_chain );
}
for( i = 0; i < 4; i++ )
{
if( (fmt_last.audio.i_channels !=
id->p_encoder->fmt_in.audio.i_channels) ||
(fmt_last.audio.i_rate != id->p_encoder->fmt_in.audio.i_rate) ||
(fmt_last.i_codec != id->p_encoder->fmt_in.i_codec) )
{
msg_Dbg( p_stream, "Looking for filter "
"(%4.4s->%4.4s, channels %d->%d, rate %d->%d)",
(char *)&fmt_last.i_codec,
(char *)&id->p_encoder->fmt_in.i_codec,
fmt_last.audio.i_channels,
id->p_encoder->fmt_in.audio.i_channels,
fmt_last.audio.i_rate,
id->p_encoder->fmt_in.audio.i_rate );
filter_chain_AppendFilter( id->p_f_chain, NULL, NULL,
&fmt_last, &id->p_encoder->fmt_in );
fmt_last = *filter_chain_GetFmtOut( id->p_f_chain );
}
else break;
}
/* Final checks to see if conversions were successful */
if( fmt_last.i_codec != id->p_encoder->fmt_in.i_codec )
{
msg_Err( p_stream, "no audio filter found "
"(%4.4s->%4.4s, channels %d->%d, rate %d->%d)",
(char *)&fmt_last.i_codec,
(char *)&id->p_encoder->fmt_in.i_codec,
fmt_last.audio.i_channels,
id->p_encoder->fmt_in.audio.i_channels,
fmt_last.audio.i_rate,
id->p_encoder->fmt_in.audio.i_rate );
transcode_audio_close( id );
return VLC_EGENERIC;
}
/* Load user specified audio filters now */
/* Load user specified audio filters */
if( p_sys->psz_af2 )
{
id->p_uf_chain = filter_chain_New( p_stream, "audio filter2", false,
transcode_audio_filter_allocation_init, NULL, NULL );
filter_chain_Reset( id->p_uf_chain, &fmt_last, &id->p_encoder->fmt_in );
filter_chain_AppendFromString( id->p_uf_chain, p_sys->psz_af2 );
fmt_last = *filter_chain_GetFmtOut( id->p_uf_chain );
}
if( fmt_last.audio.i_channels != id->p_encoder->fmt_in.audio.i_channels )
{
#if 1
module_unneed( id->p_encoder, id->p_encoder->p_module );
id->p_encoder->p_module = NULL;
/* This might work, but only if the encoder is restarted */
id->p_encoder->fmt_in.audio.i_channels = fmt_last.audio.i_channels;
id->p_encoder->fmt_out.audio.i_channels = fmt_last.audio.i_channels;
id->p_encoder->fmt_in.audio.i_physical_channels =
id->p_encoder->fmt_in.audio.i_original_channels =
fmt_last.audio.i_physical_channels;
id->p_encoder->fmt_out.audio.i_physical_channels =
id->p_encoder->fmt_out.audio.i_original_channels =
fmt_last.audio.i_physical_channels;
msg_Dbg( p_stream, "number of audio channels for mixing changed, "
"trying to reopen the encoder for mixing %i to %i channels",
fmt_last.audio.i_channels,
id->p_encoder->fmt_in.audio.i_channels );
/* reload encoder */
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 ||
fmt_last.audio.i_channels != id->p_encoder->fmt_in.audio.i_channels ||
fmt_last.i_codec != id->p_encoder->fmt_in.i_codec )
es_format_t fmt_fl32 = fmt_last;
fmt_fl32.i_codec =
fmt_fl32.audio.i_format = VLC_FOURCC('f','l','3','2');
if( transcode_audio_filter_chain_build( p_stream, id->p_uf_chain,
&fmt_fl32, &fmt_last ) )
{
if( id->p_encoder->p_module )
{
module_unneed( id->p_encoder, id->p_encoder->p_module );
id->p_encoder->p_module = NULL;
}
msg_Err( p_stream, "cannot find audio encoder (module:%s fourcc:%4.4s)",
p_sys->psz_aenc ? p_sys->psz_aenc : "any",
(char *)&p_sys->i_acodec );
transcode_audio_close( id );
return VLC_EGENERIC;
}
id->p_encoder->fmt_in.audio.i_format = id->p_encoder->fmt_in.i_codec;
id->p_encoder->fmt_in.audio.i_bitspersample =
aout_BitsPerSample( id->p_encoder->fmt_in.i_codec );
#else
msg_Err( p_stream, "no audio filter found for mixing from"
" %i to %i channels", fmt_last.audio.i_channels,
id->p_encoder->fmt_in.audio.i_channels );
fmt_last = fmt_fl32;
transcode_audio_close( id );
return VLC_EGENERIC;
#endif
id->p_uf_chain = filter_chain_New( p_stream, "audio filter2", false,
transcode_audio_filter_allocation_init, NULL, NULL );
filter_chain_Reset( id->p_uf_chain, &fmt_last, &fmt_fl32 );
if( filter_chain_AppendFromString( id->p_uf_chain, p_sys->psz_af2 ) > 0 )
fmt_last = *filter_chain_GetFmtOut( id->p_uf_chain );
}
if( fmt_last.audio.i_rate != id->p_encoder->fmt_in.audio.i_rate )
/* Load conversion filters */
id->p_f_chain = filter_chain_New( p_stream, "audio filter2", true,
transcode_audio_filter_allocation_init, NULL, NULL );
filter_chain_Reset( id->p_f_chain, &fmt_last, &id->p_encoder->fmt_in );
if( transcode_audio_filter_chain_build( p_stream, id->p_f_chain,
&id->p_encoder->fmt_in, &fmt_last ) )
{
msg_Err( p_stream, "no audio filter found for resampling from"
" %iHz to %iHz", fmt_last.audio.i_rate,
id->p_encoder->fmt_in.audio.i_rate );
#if 0
/* FIXME : this might work, but only if the encoder is restarted */
id->p_encoder->fmt_in.audio.i_rate = fmt_last.audio.i_rate;
id->p_encoder->fmt_out.audio.i_rate = fmt_last.audio.i_rate;
#else
transcode_audio_close( id );
return VLC_EGENERIC;
#endif
}
fmt_last = id->p_encoder->fmt_in;
/* FIXME: Hack for mp3 transcoding support */
if( id->p_encoder->fmt_out.i_codec == VLC_FOURCC( 'm','p','3',' ' ) )
......@@ -1285,10 +1282,10 @@ static void transcode_audio_close( sout_stream_id_t *id )
id->p_encoder->p_module = NULL;
/* Close filters */
if( id->p_f_chain )
filter_chain_Delete( id->p_f_chain );
if( id->p_uf_chain )
filter_chain_Delete( id->p_uf_chain );
if( id->p_f_chain )
filter_chain_Delete( id->p_f_chain );
}
static int transcode_audio_process( sout_stream_t *p_stream,
......@@ -1329,9 +1326,13 @@ static int transcode_audio_process( sout_stream_t *p_stream,
p_audio_block->i_samples = p_audio_buf->i_nb_samples;
/* Run filter chain */
p_audio_block = filter_chain_AudioFilter( id->p_f_chain, p_audio_block );
if( id->p_uf_chain )
{
p_audio_block = filter_chain_AudioFilter( id->p_uf_chain, p_audio_block );
assert( p_audio_block );
}
p_audio_block = filter_chain_AudioFilter( id->p_f_chain, p_audio_block );
assert( p_audio_block );
p_audio_buf->p_buffer = p_audio_block->p_buffer;
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment