- 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,
- AVPacket *avpkt)
-{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- Mpeg1Context *s = avctx->priv_data;
- AVFrame *picture = data;
- MpegEncContext *s2 = &s->mpeg_enc_ctx;
- av_dlog(avctx, "fill_buffer\n");
-
- if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
- /* special case for last picture */
- if (s2->low_delay == 0 && s2->next_picture_ptr) {
- *picture = *(AVFrame*)s2->next_picture_ptr;
- s2->next_picture_ptr = NULL;
-
- *data_size = sizeof(AVFrame);
- }
- return buf_size;
- }
-
- if (s2->flags & CODEC_FLAG_TRUNCATED) {
- int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL);
-
- if (ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0)
- return buf_size;
- }
-
- if (s->mpeg_enc_ctx_allocated == 0 && avctx->codec_tag == AV_RL32("VCR2"))
- vcr2_init_sequence(avctx);
-
- s->slice_count = 0;
-
- if (avctx->extradata && !avctx->frame_number) {
- int ret = decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size);
- if (ret < 0 && avctx->error_recognition >= FF_ER_EXPLODE)
- return ret;
- }
-
- return decode_chunks(avctx, picture, data_size, buf, buf_size);
-}
-
-static int decode_chunks(AVCodecContext *avctx,
- AVFrame *picture, int *data_size,