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Diffstat (limited to 'media/libtheora/lib/decinfo.c')
-rw-r--r--media/libtheora/lib/decinfo.c250
1 files changed, 0 insertions, 250 deletions
diff --git a/media/libtheora/lib/decinfo.c b/media/libtheora/lib/decinfo.c
deleted file mode 100644
index 603b1f93e..000000000
--- a/media/libtheora/lib/decinfo.c
+++ /dev/null
@@ -1,250 +0,0 @@
-/********************************************************************
- * *
- * THIS FILE IS PART OF THE OggTheora 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 Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
- * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
- * *
- ********************************************************************
-
- function:
- last mod: $Id: decinfo.c 17276 2010-06-05 05:57:05Z tterribe $
-
- ********************************************************************/
-
-#include <stdlib.h>
-#include <string.h>
-#include <limits.h>
-#include "decint.h"
-
-
-
-/*Unpacks a series of octets from a given byte array into the pack buffer.
- No checking is done to ensure the buffer contains enough data.
- _opb: The pack buffer to read the octets from.
- _buf: The byte array to store the unpacked bytes in.
- _len: The number of octets to unpack.*/
-static void oc_unpack_octets(oc_pack_buf *_opb,char *_buf,size_t _len){
- while(_len-->0){
- long val;
- val=oc_pack_read(_opb,8);
- *_buf++=(char)val;
- }
-}
-
-/*Unpacks a 32-bit integer encoded by octets in little-endian form.*/
-static long oc_unpack_length(oc_pack_buf *_opb){
- long ret[4];
- int i;
- for(i=0;i<4;i++)ret[i]=oc_pack_read(_opb,8);
- return ret[0]|ret[1]<<8|ret[2]<<16|ret[3]<<24;
-}
-
-static int oc_info_unpack(oc_pack_buf *_opb,th_info *_info){
- long val;
- /*Check the codec bitstream version.*/
- val=oc_pack_read(_opb,8);
- _info->version_major=(unsigned char)val;
- val=oc_pack_read(_opb,8);
- _info->version_minor=(unsigned char)val;
- val=oc_pack_read(_opb,8);
- _info->version_subminor=(unsigned char)val;
- /*verify we can parse this bitstream version.
- We accept earlier minors and all subminors, by spec*/
- if(_info->version_major>TH_VERSION_MAJOR||
- _info->version_major==TH_VERSION_MAJOR&&
- _info->version_minor>TH_VERSION_MINOR){
- return TH_EVERSION;
- }
- /*Read the encoded frame description.*/
- val=oc_pack_read(_opb,16);
- _info->frame_width=(ogg_uint32_t)val<<4;
- val=oc_pack_read(_opb,16);
- _info->frame_height=(ogg_uint32_t)val<<4;
- val=oc_pack_read(_opb,24);
- _info->pic_width=(ogg_uint32_t)val;
- val=oc_pack_read(_opb,24);
- _info->pic_height=(ogg_uint32_t)val;
- val=oc_pack_read(_opb,8);
- _info->pic_x=(ogg_uint32_t)val;
- val=oc_pack_read(_opb,8);
- _info->pic_y=(ogg_uint32_t)val;
- val=oc_pack_read(_opb,32);
- _info->fps_numerator=(ogg_uint32_t)val;
- val=oc_pack_read(_opb,32);
- _info->fps_denominator=(ogg_uint32_t)val;
- if(_info->frame_width==0||_info->frame_height==0||
- _info->pic_width+_info->pic_x>_info->frame_width||
- _info->pic_height+_info->pic_y>_info->frame_height||
- _info->fps_numerator==0||_info->fps_denominator==0){
- return TH_EBADHEADER;
- }
- /*Note: The sense of pic_y is inverted in what we pass back to the
- application compared to how it is stored in the bitstream.
- This is because the bitstream uses a right-handed coordinate system, while
- applications expect a left-handed one.*/
- _info->pic_y=_info->frame_height-_info->pic_height-_info->pic_y;
- val=oc_pack_read(_opb,24);
- _info->aspect_numerator=(ogg_uint32_t)val;
- val=oc_pack_read(_opb,24);
- _info->aspect_denominator=(ogg_uint32_t)val;
- val=oc_pack_read(_opb,8);
- _info->colorspace=(th_colorspace)val;
- val=oc_pack_read(_opb,24);
- _info->target_bitrate=(int)val;
- val=oc_pack_read(_opb,6);
- _info->quality=(int)val;
- val=oc_pack_read(_opb,5);
- _info->keyframe_granule_shift=(int)val;
- val=oc_pack_read(_opb,2);
- _info->pixel_fmt=(th_pixel_fmt)val;
- if(_info->pixel_fmt==TH_PF_RSVD)return TH_EBADHEADER;
- val=oc_pack_read(_opb,3);
- if(val!=0||oc_pack_bytes_left(_opb)<0)return TH_EBADHEADER;
- return 0;
-}
-
-static int oc_comment_unpack(oc_pack_buf *_opb,th_comment *_tc){
- long len;
- int i;
- /*Read the vendor string.*/
- len=oc_unpack_length(_opb);
- if(len<0||len>oc_pack_bytes_left(_opb))return TH_EBADHEADER;
- _tc->vendor=_ogg_malloc((size_t)len+1);
- if(_tc->vendor==NULL)return TH_EFAULT;
- oc_unpack_octets(_opb,_tc->vendor,len);
- _tc->vendor[len]='\0';
- /*Read the user comments.*/
- _tc->comments=(int)oc_unpack_length(_opb);
- len=_tc->comments;
- if(len<0||len>(LONG_MAX>>2)||len<<2>oc_pack_bytes_left(_opb)){
- _tc->comments=0;
- return TH_EBADHEADER;
- }
- _tc->comment_lengths=(int *)_ogg_malloc(
- _tc->comments*sizeof(_tc->comment_lengths[0]));
- _tc->user_comments=(char **)_ogg_malloc(
- _tc->comments*sizeof(_tc->user_comments[0]));
- if(_tc->comment_lengths==NULL||_tc->user_comments==NULL){
- _tc->comments=0;
- return TH_EFAULT;
- }
- for(i=0;i<_tc->comments;i++){
- len=oc_unpack_length(_opb);
- if(len<0||len>oc_pack_bytes_left(_opb)){
- _tc->comments=i;
- return TH_EBADHEADER;
- }
- _tc->comment_lengths[i]=len;
- _tc->user_comments[i]=_ogg_malloc((size_t)len+1);
- if(_tc->user_comments[i]==NULL){
- _tc->comments=i;
- return TH_EFAULT;
- }
- oc_unpack_octets(_opb,_tc->user_comments[i],len);
- _tc->user_comments[i][len]='\0';
- }
- return oc_pack_bytes_left(_opb)<0?TH_EBADHEADER:0;
-}
-
-static int oc_setup_unpack(oc_pack_buf *_opb,th_setup_info *_setup){
- int ret;
- /*Read the quantizer tables.*/
- ret=oc_quant_params_unpack(_opb,&_setup->qinfo);
- if(ret<0)return ret;
- /*Read the Huffman trees.*/
- return oc_huff_trees_unpack(_opb,_setup->huff_tables);
-}
-
-static void oc_setup_clear(th_setup_info *_setup){
- oc_quant_params_clear(&_setup->qinfo);
- oc_huff_trees_clear(_setup->huff_tables);
-}
-
-static int oc_dec_headerin(oc_pack_buf *_opb,th_info *_info,
- th_comment *_tc,th_setup_info **_setup,ogg_packet *_op){
- char buffer[6];
- long val;
- int packtype;
- int ret;
- val=oc_pack_read(_opb,8);
- packtype=(int)val;
- /*If we're at a data packet and we have received all three headers, we're
- done.*/
- if(!(packtype&0x80)&&_info->frame_width>0&&_tc->vendor!=NULL&&*_setup!=NULL){
- return 0;
- }
- /*Check the codec string.*/
- oc_unpack_octets(_opb,buffer,6);
- if(memcmp(buffer,"theora",6)!=0)return TH_ENOTFORMAT;
- switch(packtype){
- /*Codec info header.*/
- case 0x80:{
- /*This should be the first packet, and we should not already be
- initialized.*/
- if(!_op->b_o_s||_info->frame_width>0)return TH_EBADHEADER;
- ret=oc_info_unpack(_opb,_info);
- if(ret<0)th_info_clear(_info);
- else ret=3;
- }break;
- /*Comment header.*/
- case 0x81:{
- if(_tc==NULL)return TH_EFAULT;
- /*We shoud have already decoded the info header, and should not yet have
- decoded the comment header.*/
- if(_info->frame_width==0||_tc->vendor!=NULL)return TH_EBADHEADER;
- ret=oc_comment_unpack(_opb,_tc);
- if(ret<0)th_comment_clear(_tc);
- else ret=2;
- }break;
- /*Codec setup header.*/
- case 0x82:{
- oc_setup_info *setup;
- if(_tc==NULL||_setup==NULL)return TH_EFAULT;
- /*We should have already decoded the info header and the comment header,
- and should not yet have decoded the setup header.*/
- if(_info->frame_width==0||_tc->vendor==NULL||*_setup!=NULL){
- return TH_EBADHEADER;
- }
- setup=(oc_setup_info *)_ogg_calloc(1,sizeof(*setup));
- if(setup==NULL)return TH_EFAULT;
- ret=oc_setup_unpack(_opb,setup);
- if(ret<0){
- oc_setup_clear(setup);
- _ogg_free(setup);
- }
- else{
- *_setup=setup;
- ret=1;
- }
- }break;
- default:{
- /*We don't know what this header is.*/
- return TH_EBADHEADER;
- }break;
- }
- return ret;
-}
-
-
-/*Decodes one header packet.
- This should be called repeatedly with the packets at the beginning of the
- stream until it returns 0.*/
-int th_decode_headerin(th_info *_info,th_comment *_tc,
- th_setup_info **_setup,ogg_packet *_op){
- oc_pack_buf opb;
- if(_op==NULL)return TH_EBADHEADER;
- if(_info==NULL)return TH_EFAULT;
- oc_pack_readinit(&opb,_op->packet,_op->bytes);
- return oc_dec_headerin(&opb,_info,_tc,_setup,_op);
-}
-
-void th_setup_free(th_setup_info *_setup){
- if(_setup!=NULL){
- oc_setup_clear(_setup);
- _ogg_free(_setup);
- }
-}
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