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Adds support for all Vorbis mappings

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This commit is contained in:
Jean-Marc Valin 2013-04-29 18:32:27 -04:00
parent 172f66a3ac
commit 7a8b1399d2
1 changed files with 66 additions and 31 deletions
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77
src/opus_multistream_encoder.c
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@ -38,6 +38,24 @@
#include "os_support.h"
#include "analysis.h"
typedef struct {
int nb_streams;
int nb_coupled_streams;
unsigned char mapping[8];
} VorbisLayout;
/* Index is nb_channel-1*/
static const VorbisLayout vorbis_mappings[8] = {
{1, 0, {0}}, /* 1: mono */
{1, 1, {0, 1}}, /* 2: stereo */
{2, 1, {0, 2, 1}}, /* 3: 1-d surround */
{2, 2, {0, 1, 2, 3}}, /* 4: quadraphonic surround */
{3, 2, {0, 4, 1, 2, 3}}, /* 5: 5-channel surround */
{4, 2, {0, 4, 1, 2, 3, 5}}, /* 6: 5.1 surround */
{4, 3, {0, 4, 1, 2, 3, 5, 6}}, /* 7: 6.1 surround */
{5, 3, {0, 6, 1, 2, 3, 4, 5, 7}}, /* 8: 7.1 surround */
};
struct OpusMSEncoder {
TonalityAnalysisState analysis;
ChannelLayout layout;
@ -87,18 +105,26 @@ opus_int32 opus_multistream_surround_encoder_get_size(int channels, int mapping_
int nb_streams;
int nb_coupled_streams;
if (channels==1 && mapping_family<=1)
if (mapping_family==0)
{
nb_streams = 1;
if (channels==1)
{
nb_streams=1;
nb_coupled_streams=0;
} else if (channels==2 && mapping_family<=1)
} else if (channels==2)
{
nb_streams = 1;
nb_streams=1;
nb_coupled_streams=1;
} else if (channels==6 && mapping_family==1)
} else
return 0;
} else if (mapping_family==1 && channels<=8 && channels>=1)
{
nb_streams = 4;
nb_coupled_streams=2;
nb_streams=vorbis_mappings[channels-1].nb_streams;
nb_coupled_streams=vorbis_mappings[channels-1].nb_coupled_streams;
} else if (mapping_family==255)
{
nb_streams=channels;
nb_coupled_streams=0;
} else
return 0;
return opus_multistream_encoder_get_size(nb_streams, nb_coupled_streams);
@ -186,30 +212,39 @@ int opus_multistream_surround_encoder_init(
)
{
st->lfe_stream = -1;
if (channels==1 && mapping_family<=1)
if (mapping_family==0)
{
if (channels==1)
{
*streams=1;
*coupled_streams=0;
mapping[0]=0;
} else if (channels==2 && mapping_family<=1)
} else if (channels==2)
{
*streams=1;
*coupled_streams=1;
mapping[0]=0;
mapping[1]=1;
} else if (channels==6 && mapping_family==1)
{
*streams=4;
*coupled_streams=2;
mapping[0]=0;
mapping[1]=4;
mapping[2]=1;
mapping[3]=2;
mapping[4]=3;
mapping[5]=5;
st->lfe_stream = 3;
} else
return OPUS_BAD_ARG;
return OPUS_UNIMPLEMENTED;
} else if (mapping_family==1 && channels<=8 && channels>=1)
{
int i;
*streams=vorbis_mappings[channels-1].nb_streams;
*coupled_streams=vorbis_mappings[channels-1].nb_coupled_streams;
for (i=0;i<channels;i++)
mapping[i] = vorbis_mappings[channels-1].mapping[i];
if (channels>=6)
st->lfe_stream = *streams-1;
} else if (mapping_family==255)
{
int i;
*streams=channels;
*coupled_streams=0;
for(i=0;i<channels;i++)
mapping[i] = i;
} else
return OPUS_UNIMPLEMENTED;
opus_multistream_encoder_init_impl(st, Fs, channels, *streams, *coupled_streams, mapping, application, 1);
return OPUS_OK;
}