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/********************************************************************
* *
* 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 1994-2001 *
* by the XIPHOPHORUS Company http://www.xiph.org/ *
********************************************************************
function: simple programmatic interface for encoder mode setup
last mod: $Id: vorbisenc.c,v 1.6 2001/02/26 03:50:43 xiphmont Exp $
********************************************************************/
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "vorbis/codec.h"
#include "vorbis/vorbisenc.h"
#include "codec_internal.h"
#include "registry.h"
#include "modes/modes.h"
#include "os.h"
#include "misc.h"
/* deepcopy all but the codebooks; in this usage, they're static
(don't copy as they could be big) */
static void codec_setup_partialcopy(codec_setup_info *ci,
codec_setup_info *cs){
int i;
memcpy(ci,cs,sizeof(codec_setup_info)); /* to get the flat numbers */
/* codebooks */
for(i=0;i<ci->books;i++){
ci->book_param[i]=cs->book_param[i];
}
/* time backend settings */
for(i=0;i<ci->times;i++){
ci->time_param[i]=_time_P[ci->time_type[i]]->
copy_info(cs->time_param[i]);
}
/* floor backend settings */
for(i=0;i<ci->floors;i++){
ci->floor_param[i]=_floor_P[ci->floor_type[i]]->
copy_info(cs->floor_param[i]);
}
/* residue backend settings */
for(i=0;i<ci->residues;i++){
ci->residue_param[i]=_residue_P[ci->residue_type[i]]->
copy_info(cs->residue_param[i]);
}
/* map backend settings */
for(i=0;i<ci->maps;i++){
ci->map_param[i]=_mapping_P[ci->map_type[i]]->
copy_info(cs->map_param[i]);
}
/* mode settings */
for(i=0;i<ci->modes;i++){
ci->mode_param[i]=_ogg_calloc(1,sizeof(vorbis_info_mode));
ci->mode_param[i]->blockflag=cs->mode_param[i]->blockflag;
ci->mode_param[i]->windowtype=cs->mode_param[i]->windowtype;
ci->mode_param[i]->transformtype=cs->mode_param[i]->transformtype;
ci->mode_param[i]->mapping=cs->mode_param[i]->mapping;
}
/* psy settings */
for(i=0;i<ci->psys;i++){
ci->psy_param[i]=_vi_psy_copy(cs->psy_param[i]);
}
}
/* right now, this just encapsultes the old modes behind the interface
we'll be using from here on out. After beta 3, the new bitrate
tracking/modding/tuning engine will lurk inside */
/* encoders will need to use vorbis_info_init beforehand and call
vorbis_info clear when all done */
int vorbis_encode_init(vorbis_info *vi,
long channels,
long rate,
long max_bitrate,
long nominal_bitrate,
long min_bitrate){
long bpch;
int i,j;
codec_setup_info *ci=vi->codec_setup;
codec_setup_info *mode=NULL;
if(!ci)return(OV_EFAULT);
vi->version=0;
vi->channels=channels;
vi->rate=rate;
vi->bitrate_upper=max_bitrate;
vi->bitrate_nominal=nominal_bitrate;
vi->bitrate_lower=min_bitrate;
vi->bitrate_window=2;
/* copy a mode into our allocated storage */
bpch=nominal_bitrate/channels;
if(bpch<60000){
/* mode A */
mode=&info_AA;
}else if(bpch<75000){
/* mode A */
mode=&info_A;
}else if(bpch<90000){
/* mode B */
mode=&info_B;
}else if(bpch<110000){
/* mode C */
mode=&info_C;
}else if(bpch<160000){
/* mode D */
mode=&info_D;
}else{
/* mode E */
mode=&info_E;
}
/* now we have to deepcopy */
codec_setup_partialcopy(ci,mode);
/* adjust for sample rate */
for(i=0;i<ci->floors;i++)
((vorbis_info_floor0 *)(ci->floor_param[i]))->rate=rate;
/* adjust for channels; all our mappings use submap zero now */
/* yeah, OK, _ogg_calloc did this for us. But it's a reminder/placeholder */
for(i=0;i<ci->maps;i++)
for(j=0;j<channels;j++)
((vorbis_info_mapping0 *)ci->map_param[i])->chmuxlist[j]=0;
return(0);
}
int vorbis_encode_ctl(vorbis_info *vi,int number,void *arg){
return(OV_EIMPL);
}
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