From 7a8b1399d24e2da23350d1ce219bdd3fcef26183 Mon Sep 17 00:00:00 2001
From: Jean-Marc Valin <jmvalin@jmvalin.ca>
Date: Mon, 29 Apr 2013 18:32:27 -0400
Subject: [PATCH] Adds support for all Vorbis mappings
---
src/opus_multistream_encoder.c | 95 +++++++++++++++++++++++-----------
1 file changed, 65 insertions(+), 30 deletions(-)
diff --git a/src/opus_multistream_encoder.c b/src/opus_multistream_encoder.c
index 9dcbb71c6..d94aa7051 100644
--- a/src/opus_multistream_encoder.c
+++ b/src/opus_multistream_encoder.c
@@ -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;
- nb_coupled_streams=0;
- } else if (channels==2 && mapping_family<=1)
+ if (channels==1)
+ {
+ nb_streams=1;
+ nb_coupled_streams=0;
+ } else if (channels==2)
+ {
+ nb_streams=1;
+ nb_coupled_streams=1;
+ } else
+ return 0;
+ } else if (mapping_family==1 && channels<=8 && channels>=1)
{
- nb_streams = 1;
- nb_coupled_streams=1;
- } else if (channels==6 && mapping_family==1)
+ 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 = 4;
- nb_coupled_streams=2;
+ 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)
{
- *streams=1;
+ if (channels==1)
+ {
+ *streams=1;
+ *coupled_streams=0;
+ mapping[0]=0;
+ } else if (channels==2)
+ {
+ *streams=1;
+ *coupled_streams=1;
+ mapping[0]=0;
+ mapping[1]=1;
+ } else
+ 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;
- mapping[0]=0;
- } else if (channels==2 && mapping_family<=1)
- {
- *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;
+ for(i=0;i<channels;i++)
+ mapping[i] = i;
} else
- return OPUS_BAD_ARG;
+ return OPUS_UNIMPLEMENTED;
opus_multistream_encoder_init_impl(st, Fs, channels, *streams, *coupled_streams, mapping, application, 1);
return OPUS_OK;
}
--
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