videolan/ffmpeg
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Factorize code a little.

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Originally committed as revision 12674 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-04-03 18:25:07 +00:00
parent 60080b0805
commit 7f8ef97534
1 changed files with 18 additions and 8 deletions
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26
libavcodec/mpeg12.c
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@ -2234,16 +2234,16 @@ int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
return END_NOT_FOUND;
}
static int decode_chunks(AVCodecContext *avctx,
AVFrame *picture, int *data_size,
const uint8_t *buf, int buf_size);
/* handle buffering and image synchronisation */
static int mpeg_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
const uint8_t *buf, int buf_size)
{
Mpeg1Context *s = avctx->priv_data;
const uint8_t *buf_end;
const uint8_t *buf_ptr;
uint32_t start_code;
int ret, input_size;
AVFrame *picture = data;
MpegEncContext *s2 = &s->mpeg_enc_ctx;
dprintf(avctx, "fill_buffer\n");
@ -2266,9 +2266,6 @@ static int mpeg_decode_frame(AVCodecContext *avctx,
return buf_size;
}
buf_ptr = buf;
buf_end = buf + buf_size;
#if 0
if (s->repeat_field % 2 == 1) {
s->repeat_field++;
@ -2286,9 +2283,22 @@ static int mpeg_decode_frame(AVCodecContext *avctx,
s->slice_count= 0;
return decode_chunks(avctx, picture, data_size, buf, buf_size);
}
static int decode_chunks(AVCodecContext *avctx,
AVFrame *picture, int *data_size,
const uint8_t *buf, int buf_size)
{
Mpeg1Context *s = avctx->priv_data;
MpegEncContext *s2 = &s->mpeg_enc_ctx;
const uint8_t *buf_ptr = buf;
const uint8_t *buf_end = buf + buf_size;
int ret, input_size;
for(;;) {
/* find start next code */
start_code = -1;
uint32_t start_code = -1;
buf_ptr = ff_find_start_code(buf_ptr,buf_end, &start_code);
if (start_code > 0x1ff){
if(s2->pict_type != FF_B_TYPE || avctx->skip_frame <= AVDISCARD_DEFAULT){