diff options
Diffstat (limited to 'src/libvorbis-1.3.4/lib/synthesis.c')
| -rw-r--r-- | src/libvorbis-1.3.4/lib/synthesis.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/src/libvorbis-1.3.4/lib/synthesis.c b/src/libvorbis-1.3.4/lib/synthesis.c deleted file mode 100644 index 1af211d0..00000000 --- a/src/libvorbis-1.3.4/lib/synthesis.c +++ /dev/null @@ -1,184 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: single-block PCM synthesis - last mod: $Id: synthesis.c 17474 2010-09-30 03:41:41Z gmaxwell $ - - ********************************************************************/ - -#include <stdio.h> -#include <ogg/ogg.h> -#include "vorbis/codec.h" -#include "codec_internal.h" -#include "registry.h" -#include "misc.h" -#include "os.h" - -int vorbis_synthesis(vorbis_block *vb,ogg_packet *op){ - vorbis_dsp_state *vd= vb ? vb->vd : 0; - private_state *b= vd ? vd->backend_state : 0; - vorbis_info *vi= vd ? vd->vi : 0; - codec_setup_info *ci= vi ? vi->codec_setup : 0; - oggpack_buffer *opb=vb ? &vb->opb : 0; - int type,mode,i; - - if (!vd || !b || !vi || !ci || !opb) { - return OV_EBADPACKET; - } - - /* first things first. Make sure decode is ready */ - _vorbis_block_ripcord(vb); - oggpack_readinit(opb,op->packet,op->bytes); - - /* Check the packet type */ - if(oggpack_read(opb,1)!=0){ - /* Oops. This is not an audio data packet */ - return(OV_ENOTAUDIO); - } - - /* read our mode and pre/post windowsize */ - mode=oggpack_read(opb,b->modebits); - if(mode==-1){ - return(OV_EBADPACKET); - } - - vb->mode=mode; - if(!ci->mode_param[mode]){ - return(OV_EBADPACKET); - } - - vb->W=ci->mode_param[mode]->blockflag; - if(vb->W){ - - /* this doesn;t get mapped through mode selection as it's used - only for window selection */ - vb->lW=oggpack_read(opb,1); - vb->nW=oggpack_read(opb,1); - if(vb->nW==-1){ - return(OV_EBADPACKET); - } - }else{ - vb->lW=0; - vb->nW=0; - } - - /* more setup */ - vb->granulepos=op->granulepos; - vb->sequence=op->packetno; - vb->eofflag=op->e_o_s; - - /* alloc pcm passback storage */ - vb->pcmend=ci->blocksizes[vb->W]; - vb->pcm=_vorbis_block_alloc(vb,sizeof(*vb->pcm)*vi->channels); - for(i=0;i<vi->channels;i++) - vb->pcm[i]=_vorbis_block_alloc(vb,vb->pcmend*sizeof(*vb->pcm[i])); - - /* unpack_header enforces range checking */ - type=ci->map_type[ci->mode_param[mode]->mapping]; - - return(_mapping_P[type]->inverse(vb,ci->map_param[ci->mode_param[mode]-> - mapping])); -} - -/* used to track pcm position without actually performing decode. - Useful for sequential 'fast forward' */ -int vorbis_synthesis_trackonly(vorbis_block *vb,ogg_packet *op){ - vorbis_dsp_state *vd=vb->vd; - private_state *b=vd->backend_state; - vorbis_info *vi=vd->vi; - codec_setup_info *ci=vi->codec_setup; - oggpack_buffer *opb=&vb->opb; - int mode; - - /* first things first. Make sure decode is ready */ - _vorbis_block_ripcord(vb); - oggpack_readinit(opb,op->packet,op->bytes); - - /* Check the packet type */ - if(oggpack_read(opb,1)!=0){ - /* Oops. This is not an audio data packet */ - return(OV_ENOTAUDIO); - } - - /* read our mode and pre/post windowsize */ - mode=oggpack_read(opb,b->modebits); - if(mode==-1)return(OV_EBADPACKET); - - vb->mode=mode; - if(!ci->mode_param[mode]){ - return(OV_EBADPACKET); - } - - vb->W=ci->mode_param[mode]->blockflag; - if(vb->W){ - vb->lW=oggpack_read(opb,1); - vb->nW=oggpack_read(opb,1); - if(vb->nW==-1) return(OV_EBADPACKET); - }else{ - vb->lW=0; - vb->nW=0; - } - - /* more setup */ - vb->granulepos=op->granulepos; - vb->sequence=op->packetno; - vb->eofflag=op->e_o_s; - - /* no pcm */ - vb->pcmend=0; - vb->pcm=NULL; - - return(0); -} - -long vorbis_packet_blocksize(vorbis_info *vi,ogg_packet *op){ - codec_setup_info *ci=vi->codec_setup; - oggpack_buffer opb; - int mode; - - oggpack_readinit(&opb,op->packet,op->bytes); - - /* Check the packet type */ - if(oggpack_read(&opb,1)!=0){ - /* Oops. This is not an audio data packet */ - return(OV_ENOTAUDIO); - } - - { - int modebits=0; - int v=ci->modes; - while(v>1){ - modebits++; - v>>=1; - } - - /* read our mode and pre/post windowsize */ - mode=oggpack_read(&opb,modebits); - } - if(mode==-1)return(OV_EBADPACKET); - return(ci->blocksizes[ci->mode_param[mode]->blockflag]); -} - -int vorbis_synthesis_halfrate(vorbis_info *vi,int flag){ - /* set / clear half-sample-rate mode */ - codec_setup_info *ci=vi->codec_setup; - - /* right now, our MDCT can't handle < 64 sample windows. */ - if(ci->blocksizes[0]<=64 && flag)return -1; - ci->halfrate_flag=(flag?1:0); - return 0; -} - -int vorbis_synthesis_halfrate_p(vorbis_info *vi){ - codec_setup_info *ci=vi->codec_setup; - return ci->halfrate_flag; -} |