Esempi in C++ (Cpp) per vc1_parse_frame_header_adv

Esempio n. 1

File: vc1_parser.cpp Progetto: mcodegeeks/OpenKODE-Framework

static void vc1_extract_headers(AVCodecParserContext *s, AVCodecContext *avctx,
                                const uint8_t *buf, int buf_size)
{
    VC1ParseContext *vpc = (VC1ParseContext *)s->priv_data;
    GetBitContext gb;
    const uint8_t *start, *end, *next;
    uint8_t *buf2 = (uint8_t *)av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

    vpc->v.s.avctx = avctx;
    vpc->v.parse_only = 1;
    next = buf;
    s->repeat_pict = 0;

    for(start = buf, end = buf + buf_size; next < end; start = next){
        int buf2_size, size;

        next = find_next_marker(start + 4, end);
        size = next - start - 4;
        buf2_size = vc1_unescape_buffer(start + 4, size, buf2);
        init_get_bits(&gb, buf2, buf2_size * 8);
        if(size <= 0) continue;
        switch(AV_RB32(start)){
        case VC1_CODE_SEQHDR:
            vc1_decode_sequence_header(avctx, &vpc->v, &gb);
            break;
        case VC1_CODE_ENTRYPOINT:
            vc1_decode_entry_point(avctx, &vpc->v, &gb);
            break;
        case VC1_CODE_FRAME:
            if(vpc->v.profile < PROFILE_ADVANCED)
                vc1_parse_frame_header    (&vpc->v, &gb);
            else
                vc1_parse_frame_header_adv(&vpc->v, &gb);

            /* keep AV_PICTURE_TYPE_BI internal to VC1 */
            if (vpc->v.s.pict_type == AV_PICTURE_TYPE_BI)
                s->pict_type = AV_PICTURE_TYPE_B;
            else
                s->pict_type = vpc->v.s.pict_type;

            if (avctx->ticks_per_frame > 1){
                // process pulldown flags
                s->repeat_pict = 1;
                // Pulldown flags are only valid when 'broadcast' has been set.
                // So ticks_per_frame will be 2
                if (vpc->v.rff){
                    // repeat field
                    s->repeat_pict = 2;
                }else if (vpc->v.rptfrm){
                    // repeat frames
                    s->repeat_pict = vpc->v.rptfrm * 2 + 1;
                }
            }

            break;
        }
    }

    av_free(buf2);
}

Esempio n. 2

File: vc1_parser.c Progetto: hicks0074/freescale_omx_framework

static void vc1_extract_headers(AVCodecParserContext *s, AVCodecContext *avctx,
                                const uint8_t *buf, int buf_size)
{
	VC1ParseContext *vpc = s->priv_data;
	GetBitContext gb;
	const uint8_t *start, *end, *next;
	uint8_t *buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

	vpc->v.s.avctx = avctx;
	vpc->v.parse_only = 1;
	next = buf;

	for(start = buf, end = buf + buf_size; next < end; start = next)
	{
		int buf2_size, size;

		next = find_next_marker(start + 4, end);
		size = next - start - 4;
		buf2_size = vc1_unescape_buffer(start + 4, size, buf2);
		init_get_bits(&gb, buf2, buf2_size * 8);
		if(size <= 0) continue;
		switch(AV_RB32(start))
		{
		case VC1_CODE_SEQHDR:
			vc1_decode_sequence_header(avctx, &vpc->v, &gb);
			break;
		case VC1_CODE_ENTRYPOINT:
			vc1_decode_entry_point(avctx, &vpc->v, &gb);
			break;
		case VC1_CODE_FRAME:
			if(vpc->v.profile < PROFILE_ADVANCED)
				vc1_parse_frame_header    (&vpc->v, &gb);
			else
				vc1_parse_frame_header_adv(&vpc->v, &gb);

			/* keep FF_BI_TYPE internal to VC1 */
			if (vpc->v.s.pict_type == FF_BI_TYPE)
				s->pict_type = FF_B_TYPE;
			else
				s->pict_type = vpc->v.s.pict_type;

			break;
		}
	}

	av_free(buf2);
}