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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commite2de64d6f1beb9e492daf5b886e19933c1fa41dd (patch)
tree9047cf9e6b5c43878d5bf82660adae77ceee097a /mpeglib/lib/oggvorbis/vorbisDecoder.cpp
downloadtdemultimedia-e2de64d6f1beb9e492daf5b886e19933c1fa41dd.tar.gz
tdemultimedia-e2de64d6f1beb9e492daf5b886e19933c1fa41dd.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'mpeglib/lib/oggvorbis/vorbisDecoder.cpp')
-rw-r--r--mpeglib/lib/oggvorbis/vorbisDecoder.cpp135
1 files changed, 135 insertions, 0 deletions
diff --git a/mpeglib/lib/oggvorbis/vorbisDecoder.cpp b/mpeglib/lib/oggvorbis/vorbisDecoder.cpp
new file mode 100644
index 00000000..24e9370d
--- /dev/null
+++ b/mpeglib/lib/oggvorbis/vorbisDecoder.cpp
@@ -0,0 +1,135 @@
+/*
+ converts ogg frames into audioFrames
+ Copyright (C) 2001 Martin Vogt
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Library General Public License as published by
+ the Free Software Foundation.
+
+ For more information look at the file COPYRIGHT in this package
+
+ */
+
+
+#include "vorbisDecoder.h"
+
+#ifdef OGG_VORBIS
+
+#define _VORBIS_NEED_SYNTHHEADER_1 1
+#define _VORBIS_NEED_SYNTHHEADER_2 2
+#define _VORBIS_NEED_SYNTHHEADER_3 3
+
+#define _VORBIS_DECODE_SETUP 4
+#define _VORBIS_DECODE_LOOP 5
+
+#include <iostream>
+
+using namespace std;
+
+
+VorbisDecoder::VorbisDecoder() {
+ vorbis_info_init(&vi);
+ vorbis_comment_init(&vc);
+ reset();
+}
+
+
+VorbisDecoder::~VorbisDecoder() {
+}
+
+int VorbisDecoder::hasHeader() {
+ return (initState>=_VORBIS_DECODE_LOOP);
+}
+
+int VorbisDecoder::decode(RawFrame* rawFrame,AudioFrame* dest) {
+
+ if ((rawFrame == NULL) || (dest == NULL)) {
+ cout << "VorbisDecoder::decode NULL pointer!"<<endl;
+ exit(-1);
+ }
+ if (rawFrame->getFrameType() != _FRAME_RAW_OGG) {
+ cout << "VorbisDecoder::decode not _FRAME_RAW_OGG"<<endl;
+ exit(-1);
+ }
+
+ ogg_packet* op=(ogg_packet*) rawFrame->getData();
+ switch(initState) {
+ case _VORBIS_NEED_SYNTHHEADER_1:
+ case _VORBIS_NEED_SYNTHHEADER_2:
+ case _VORBIS_NEED_SYNTHHEADER_3:
+ cout << "_VORBIS_NEED_SYNTHHEADER:"<<initState<<endl;
+ if(vorbis_synthesis_headerin(&vi,&vc,op)<0){
+ /* error case; not a vorbis header */
+ fprintf(stderr,"This Ogg bitstream does not contain Vorbis "
+ "audio data.\n");
+ exit(1);
+ }
+ initState++;
+ break;
+ case _VORBIS_DECODE_SETUP:
+ cout << "_VORBIS_DECODE_SETUP"<<endl;
+ vorbis_synthesis_init(&vd,&vi); /* central decode state */
+ vorbis_block_init(&vd,&vb); /* local state for most of the decode
+ so multiple block decodes can
+ proceed in parallel. We could init
+ multiple vorbis_block structures
+ for vd here */
+ initState=_VORBIS_DECODE_LOOP;
+ // yes right, we must decode the packet!
+ // so there is no break here.
+ case _VORBIS_DECODE_LOOP: {
+ if(vorbis_synthesis(&vb,op)==0) {/* test for success! */
+ vorbis_synthesis_blockin(&vd,&vb);
+ } else {
+ cout << "vorbis_synthesis error"<<endl;
+ exit(0);
+ }
+ float **pcm;
+ /*
+
+ **pcm is a multichannel float vector. In stereo, for
+ example, pcm[0] is left, and pcm[1] is right. samples is
+ the size of each channel. Convert the float values
+ (-1.<=range<=1.) to whatever PCM format and write it out
+
+ */
+ int samples=vorbis_synthesis_pcmout(&vd,&pcm);
+ if (samples > 0) {
+ int maxSamples=dest->getSize();
+ if (samples > maxSamples) {
+ cout << "more samples in vorbis than we can store"<<endl;
+ exit(0);
+ }
+ dest->clearrawdata();
+ dest->setFrameFormat(vi.channels-1,vi.rate);
+
+ if (vi.channels == 2) {
+ dest->putFloatData(pcm[0],pcm[1],samples);
+ } else {
+ dest->putFloatData(pcm[0],NULL,samples);
+ }
+
+ vorbis_synthesis_read(&vd,samples); /* tell libvorbis how
+ many samples we
+ actually consumed */
+ return true;
+ }
+
+ return false;
+ }
+ default:
+ cout << "unknown state in vorbis decoder"<<endl;
+ exit(0);
+ }
+ return false;
+}
+
+void VorbisDecoder::reset() {
+ initState=_VORBIS_NEED_SYNTHHEADER_1;
+}
+
+void VorbisDecoder::config(const char* ,const char* ,void* ) {
+
+}
+
+#endif