C++ (Cpp) seq_parse_frame_data Examples

Example #1

File: tiertexseq.c Project: r-type/vice-libretro

static int seq_read_header(AVFormatContext *s)
{
    int i, rc;
    SeqDemuxContext *seq = s->priv_data;
    AVIOContext *pb = s->pb;
    AVStream *st;

    /* init internal buffers */
    rc = seq_init_frame_buffers(seq, pb);
    if (rc)
        return rc;

    seq->current_frame_offs = 0;

    /* preload (no audio data, just buffer operations related data) */
    for (i = 1; i <= 100; i++) {
        rc = seq_parse_frame_data(seq, pb);
        if (rc)
            return rc;
    }

    seq->current_frame_pts = 0;

    seq->audio_buffer_full = 0;

    /* initialize the video decoder stream */
    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);

    avpriv_set_pts_info(st, 32, 1, SEQ_FRAME_RATE);
    seq->video_stream_index = st->index;
    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codec->codec_id = AV_CODEC_ID_TIERTEXSEQVIDEO;
    st->codec->codec_tag = 0;  /* no fourcc */
    st->codec->width = SEQ_FRAME_W;
    st->codec->height = SEQ_FRAME_H;

    /* initialize the audio decoder stream */
    st = avformat_new_stream(s, NULL);
    if (!st)
        return AVERROR(ENOMEM);

    st->start_time = 0;
    avpriv_set_pts_info(st, 32, 1, SEQ_SAMPLE_RATE);
    seq->audio_stream_index = st->index;
    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
    st->codec->codec_tag = 0;  /* no tag */
    st->codec->channels = 1;
    st->codec->channel_layout = AV_CH_LAYOUT_MONO;
    st->codec->sample_rate = SEQ_SAMPLE_RATE;
    st->codec->bits_per_coded_sample = 16;
    st->codec->bit_rate = st->codec->sample_rate * st->codec->bits_per_coded_sample * st->codec->channels;
    st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample / 8;

    return 0;
}

Example #2

File: tiertexseq.c Project: pengdu/freescale_omx_framework

static int seq_read_packet(AVFormatContext *s, AVPacket *pkt)
{
	int rc;
	SeqDemuxContext *seq = s->priv_data;
	AVIOContext *pb = s->pb;

	if (!seq->audio_buffer_full)
	{
		rc = seq_parse_frame_data(seq, pb);
		if (rc)
			return rc;

		/* video packet */
		if (seq->current_pal_data_size + seq->current_video_data_size != 0)
		{
			if (av_new_packet(pkt, 1 + seq->current_pal_data_size + seq->current_video_data_size))
				return AVERROR(ENOMEM);

			pkt->data[0] = 0;
			if (seq->current_pal_data_size)
			{
				pkt->data[0] |= 1;
				avio_seek(pb, seq->current_frame_offs + seq->current_pal_data_offs, SEEK_SET);
				if (avio_read(pb, &pkt->data[1], seq->current_pal_data_size) != seq->current_pal_data_size)
					return AVERROR(EIO);
			}
			if (seq->current_video_data_size)
			{
				pkt->data[0] |= 2;
				memcpy(&pkt->data[1 + seq->current_pal_data_size],
				       seq->current_video_data_ptr,
				       seq->current_video_data_size);
			}
			pkt->stream_index = seq->video_stream_index;
			pkt->pts = seq->current_frame_pts;

			/* sound buffer will be processed on next read_packet() call */
			seq->audio_buffer_full = 1;
			return 0;
		}
	}

	/* audio packet */
	if (seq->current_audio_data_offs == 0) /* end of data reached */
		return AVERROR(EIO);

	avio_seek(pb, seq->current_frame_offs + seq->current_audio_data_offs, SEEK_SET);
	rc = av_get_packet(pb, pkt, seq->current_audio_data_size);
	if (rc < 0)
		return rc;

	pkt->stream_index = seq->audio_stream_index;
	seq->current_frame_pts++;

	seq->audio_buffer_full = 0;
	return 0;
}