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use generic xiph header spliting func to split theora headers 

Original thread:
Date: Thu, 22 Mar 2007 20:23:08 -0400
Subject: [Ffmpeg-devel] [PATCH] Theora in MKV (GSoC '07 Qualification)

Originally committed as revision 8506 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs 2007-03-25 01:09:26 +00:00
parent 5bb127a98f
commit da91ed594e
2 changed files with 14 additions and 10 deletions
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2
libavcodec/Makefile
View File

@ -141,7 +141,7 @@ OBJS-$(CONFIG_SVQ1_ENCODER) += svq1.o
OBJS-$(CONFIG_SVQ3_DECODER) += h264.o
OBJS-$(CONFIG_TARGA_DECODER) += targa.o
OBJS-$(CONFIG_TARGA_ENCODER) += targaenc.o
OBJS-$(CONFIG_THEORA_DECODER) += vp3.o
OBJS-$(CONFIG_THEORA_DECODER) += vp3.o xiph.o
OBJS-$(CONFIG_TIERTEXSEQVIDEO_DECODER) += tiertexseqv.o
OBJS-$(CONFIG_TIFF_DECODER) += tiff.o lzw.o
OBJS-$(CONFIG_TRUEMOTION1_DECODER) += truemotion1.o

22
libavcodec/vp3.c
View File

@ -41,6 +41,7 @@
#include "mpegvideo.h"
#include "vp3data.h"
#include "xiph.h"
#define FRAGMENT_PIXELS 8
@ -2574,8 +2575,9 @@ static int theora_decode_init(AVCodecContext *avctx)
Vp3DecodeContext *s = avctx->priv_data;
GetBitContext gb;
int ptype;
uint8_t *p= avctx->extradata;
int op_bytes, i;
uint8_t *header_start[3];
int header_len[3];
int i;
s->theora = 1;
@ -2585,12 +2587,14 @@ static int theora_decode_init(AVCodecContext *avctx)
return -1;
}
for(i=0;i<3;i++) {
op_bytes = *(p++)<<8;
op_bytes += *(p++);
if (ff_split_xiph_headers(avctx->extradata, avctx->extradata_size,
42, header_start, header_len) < 0) {
av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
return -1;
}
init_get_bits(&gb, p, op_bytes);
p += op_bytes;
for(i=0;i<3;i++) {
init_get_bits(&gb, header_start[i], header_len[i]);
ptype = get_bits(&gb, 8);
debug_vp3("Theora headerpacket type: %x\n", ptype);
@ -2620,8 +2624,8 @@ static int theora_decode_init(AVCodecContext *avctx)
av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
break;
}
if(8*op_bytes != get_bits_count(&gb))
av_log(avctx, AV_LOG_ERROR, "%d bits left in packet %X\n", 8*op_bytes - get_bits_count(&gb), ptype);
if(8*header_len[i] != get_bits_count(&gb))
av_log(avctx, AV_LOG_ERROR, "%d bits left in packet %X\n", 8*header_len[i] - get_bits_count(&gb), ptype);
if (s->theora < 0x030200)
break;
}