X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=lib%2Fsynthesis.c;h=5f6092c3d30fe59239978c73d2907d146bd8aa5b;hb=0a4beb1d04f802c48016b11fb939690e24173168;hp=52dd538f50b3f12c771b4ba7f9b084c78064e79f;hpb=117b96ee4431075adc24c09afd0b6251c8ababd6;p=platform%2Fupstream%2Flibvorbis.git diff --git a/lib/synthesis.c b/lib/synthesis.c index 52dd538..5f6092c 100644 --- a/lib/synthesis.c +++ b/lib/synthesis.c @@ -1,51 +1,179 @@ /******************************************************************** * * - * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY * - * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. * - * PLEASE READ THESE TERMS DISTRIBUTING. * + * 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 OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-1999 * - * by 1999 Monty and The XIPHOPHORUS Company * - * http://www.xiph.org/ * + * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2015 * + * by the Xiph.Org Foundation http://www.xiph.org/ * * * ******************************************************************** function: single-block PCM synthesis - author: Monty - modifications by: Monty - last modification date: Aug 08 1999 ********************************************************************/ -#include "codec.h" -#include "envelope.h" -#include "mdct.h" -#include "lpc.h" -#include "lsp.h" +#include +#include +#include "vorbis/codec.h" +#include "codec_internal.h" +#include "registry.h" +#include "misc.h" +#include "os.h" -int vorbis_synthesis(vorbis_block *vb){ - int i; - vorbis_info *vi=&vb->vd->vi; - double *window=vb->vd->window[vb->W][vb->lW][vb->nW]; - lpc_lookup *vl=&vb->vd->vl[vb->W]; +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; - /* get the LSP params back to LPC params. This will be for each - spectral floor curve */ + if (!vd || !b || !vi || !ci || !opb) { + return OV_EBADPACKET; + } - /*for(i=0;ifloorch;i++) - vorbis_lsp_to_lpc(vb->lsp[i],vb->lpc[i],vi->floororder);*/ + /* first things first. Make sure decode is ready */ + _vorbis_block_ripcord(vb); + oggpack_readinit(opb,op->packet,op->bytes); - /* Map the resulting floors back to the appropriate channels */ + /* Check the packet type */ + if(oggpack_read(opb,1)!=0){ + /* Oops. This is not an audio data packet */ + return(OV_ENOTAUDIO); + } - /*for(i=0;ichannels;i++) - vorbis_lpc_apply(vb->pcm[i],vb->pcmend,vb->lpc[vi->floormap[i]], - vb->amp[vi->floormap[i]],vi->floororder);*/ - - for(i=0;ipcm_channels;i++) - mdct_backward(&vb->vd->vm[vb->W],vb->pcm[i],vb->pcm[i],window); - _ve_envelope_apply(vb,1); + /* 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;ichannels;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; + + if(ci==NULL || ci->modes<=0){ + /* codec setup not properly intialized */ + return(OV_EFAULT); + } + + 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,ov_ilog(ci->modes-1)); + if(mode==-1 || !ci->mode_param[mode])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; +}