static void mpeg_decode_sequence_extension(Mpeg1Context *s1) { MpegEncContext *s = &s1->mpeg_enc_ctx; int horiz_size_ext, vert_size_ext; int bit_rate_ext; skip_bits(&s->gb, 1); /* profile and level esc*/ s->avctx->profile = get_bits(&s->gb, 3); s->avctx->level = get_bits(&s->gb, 4); s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */ s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */ if (!s->chroma_format) { s->chroma_format = 1; av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n"); } horiz_size_ext = get_bits(&s->gb, 2); vert_size_ext = get_bits(&s->gb, 2); s->width |= (horiz_size_ext << 12); s->height |= (vert_size_ext << 12); bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */ s->bit_rate += (bit_rate_ext << 18) * 400; check_marker(&s->gb, "after bit rate extension"); s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10; s->low_delay = get_bits1(&s->gb); if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY) s->low_delay = 1; s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1; s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1; ff_dlog(s->avctx, "sequence extension\n"); s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO; if (s->avctx->debug & FF_DEBUG_PICT_INFO) av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n", s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format, s->avctx->rc_buffer_size, s->bit_rate); }