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move all cavs-parsing to cavs.c

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This should help building parser without decoder

Originally committed as revision 6993 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefan Gehrer 2006-11-12 20:18:07 +00:00
parent 55fde95e3b
commit 53aa68b329
5 changed files with 84 additions and 83 deletions
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2
libavcodec/Makefile
View File

@ -294,7 +294,7 @@ OBJS-$(CONFIG_AMR_WB) += amrwb_float/dec_acelp.o \
OBJS-$(CONFIG_AAC_PARSER) += parser.o
OBJS-$(CONFIG_AC3_PARSER) += parser.o
OBJS-$(CONFIG_CAVS_PARSER) += parser.o
OBJS-$(CONFIG_CAVSVIDEO_PARSER) += cavs.o parser.o
OBJS-$(CONFIG_DVBSUB_PARSER) += dvbsubdec.o
OBJS-$(CONFIG_DVDSUB_PARSER) += dvdsubdec.o
OBJS-$(CONFIG_H261_PARSER) += h261.o

124
libavcodec/cavs.c
View File

@ -31,6 +31,7 @@
#include "mpegvideo.h"
#include "cavsdata.h"
#ifdef CONFIG_CAVS_DECODER
typedef struct {
MpegEncContext s;
Picture picture; ///< currently decoded frame
@ -1318,49 +1319,6 @@ static int decode_seq_header(AVSContext *h) {
return 0;
}
/**
* finds the end of the current frame in the bitstream.
* @return the position of the first byte of the next frame, or -1
*/
int ff_cavs_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size) {
int pic_found, i;
uint32_t state;
pic_found= pc->frame_start_found;
state= pc->state;
i=0;
if(!pic_found){
for(i=0; i<buf_size; i++){
state= (state<<8) | buf[i];
if(state == PIC_I_START_CODE || state == PIC_PB_START_CODE){
i++;
pic_found=1;
break;
}
}
}
if(pic_found){
/* EOF considered as end of frame */
if (buf_size == 0)
return 0;
for(; i<buf_size; i++){
state= (state<<8) | buf[i];
if((state&0xFFFFFF00) == 0x100){
if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
pc->frame_start_found=0;
pc->state=-1;
return i-3;
}
}
}
}
pc->frame_start_found= pic_found;
pc->state= state;
return END_NOT_FOUND;
}
void ff_cavs_flush(AVCodecContext * avctx) {
AVSContext *h = avctx->priv_data;
h->got_keyframe = 0;
@ -1500,3 +1458,83 @@ AVCodec cavs_decoder = {
CODEC_CAP_DR1 | CODEC_CAP_DELAY,
.flush= ff_cavs_flush,
};
#endif /* CONFIG_CAVS_DECODER */
#ifdef CONFIG_CAVSVIDEO_PARSER
/**
* finds the end of the current frame in the bitstream.
* @return the position of the first byte of the next frame, or -1
*/
static int cavs_find_frame_end(ParseContext *pc, const uint8_t *buf,
int buf_size) {
int pic_found, i;
uint32_t state;
pic_found= pc->frame_start_found;
state= pc->state;
i=0;
if(!pic_found){
for(i=0; i<buf_size; i++){
state= (state<<8) | buf[i];
if(state == PIC_I_START_CODE || state == PIC_PB_START_CODE){
i++;
pic_found=1;
break;
}
}
}
if(pic_found){
/* EOF considered as end of frame */
if (buf_size == 0)
return 0;
for(; i<buf_size; i++){
state= (state<<8) | buf[i];
if((state&0xFFFFFF00) == 0x100){
if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
pc->frame_start_found=0;
pc->state=-1;
return i-3;
}
}
}
}
pc->frame_start_found= pic_found;
pc->state= state;
return END_NOT_FOUND;
}
static int cavsvideo_parse(AVCodecParserContext *s,
AVCodecContext *avctx,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size)
{
ParseContext *pc = s->priv_data;
int next;
if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
next= buf_size;
}else{
next= cavs_find_frame_end(pc, buf, buf_size);
if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
*poutbuf = NULL;
*poutbuf_size = 0;
return buf_size;
}
}
*poutbuf = (uint8_t *)buf;
*poutbuf_size = buf_size;
return next;
}
AVCodecParser cavsvideo_parser = {
{ CODEC_ID_CAVS },
sizeof(ParseContext1),
NULL,
cavsvideo_parse,
ff_parse1_close,
ff_mpeg4video_split,
};
#endif /* CONFIG_CAVSVIDEO_PARSER */

2
libavcodec/cavsdata.h
View File

@ -131,6 +131,7 @@ enum mv_loc_t {
MV_BWD_X3
};
#ifdef CONFIG_CAVS_DECODER
static const uint8_t partition_flags[30] = {
0, //I_8X8
0, //P_SKIP
@ -639,3 +640,4 @@ static const int_fast8_t left_modifier_l[8] = { 0,-1, 6,-1,-1, 7, 6, 7};
static const int_fast8_t top_modifier_l[8] = {-1, 1, 5,-1,-1, 5, 7, 7};
static const int_fast8_t left_modifier_c[7] = { 5,-1, 2,-1, 6, 5, 6};
static const int_fast8_t top_modifier_c[7] = { 4, 1,-1,-1, 4, 6, 6};
#endif /* CONFIG_CAVS_DECODER */

36
libavcodec/parser.c
View File

@ -361,32 +361,6 @@ static int mpeg4video_parse(AVCodecParserContext *s,
}
#endif
#ifdef CONFIG_CAVSVIDEO_PARSER
static int cavsvideo_parse(AVCodecParserContext *s,
AVCodecContext *avctx,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size)
{
ParseContext *pc = s->priv_data;
int next;
if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
next= buf_size;
}else{
next= ff_cavs_find_frame_end(pc, buf, buf_size);
if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
*poutbuf = NULL;
*poutbuf_size = 0;
return buf_size;
}
}
*poutbuf = (uint8_t *)buf;
*poutbuf_size = buf_size;
return next;
}
#endif /* CONFIG_CAVSVIDEO_PARSER */
int ff_mpeg4video_split(AVCodecContext *avctx,
const uint8_t *buf, int buf_size)
{
@ -857,16 +831,6 @@ AVCodecParser mpeg4video_parser = {
ff_mpeg4video_split,
};
#endif
#ifdef CONFIG_CAVSVIDEO_PARSER
AVCodecParser cavsvideo_parser = {
{ CODEC_ID_CAVS },
sizeof(ParseContext1),
NULL,
cavsvideo_parse,
ff_parse1_close,
ff_mpeg4video_split,
};
#endif
#ifdef CONFIG_MPEGAUDIO_PARSER
AVCodecParser mpegaudio_parser = {
{ CODEC_ID_MP2, CODEC_ID_MP3 },

3
libavcodec/parser.h
View File

@ -60,7 +60,4 @@ void ff_parse1_close(AVCodecParserContext *s);
/* h263dec.c */
int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
/* cavs.c */
int ff_cavs_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
#endif /* !FFMPEG_PARSER_H */