Exemple #1
0
static int sol_read_header(AVFormatContext *s)
{
    unsigned int magic,tag;
    AVIOContext *pb = s->pb;
    unsigned int id, channels, rate, type;
    enum AVCodecID codec;
    AVStream *st;

    /* check ".snd" header */
    magic = avio_rl16(pb);
    tag = avio_rl32(pb);
    if (tag != MKTAG('S', 'O', 'L', 0))
        return -1;
    rate = avio_rl16(pb);
    type = avio_r8(pb);
    avio_skip(pb, 4); /* size */
    if (magic != 0x0B8D)
        avio_r8(pb); /* newer SOLs contain padding byte */

    codec = sol_codec_id(magic, type);
    channels = sol_channels(magic, type);

    if (codec == AV_CODEC_ID_SOL_DPCM)
        id = sol_codec_type(magic, type);
    else id = 0;

    /* now we are ready: build format streams */
    st = avformat_new_stream(s, NULL);
    if (!st)
        return -1;
    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_tag = id;
    st->codec->codec_id = codec;
    st->codec->channels = channels;
    st->codec->channel_layout = channels == 1 ? AV_CH_LAYOUT_MONO :
                                                AV_CH_LAYOUT_STEREO;
    st->codec->sample_rate = rate;
    avpriv_set_pts_info(st, 64, 1, rate);
    return 0;
}
Exemple #2
0
static int sol_read_header(AVFormatContext *s,
                          AVFormatParameters *ap)
{
    int size;
    unsigned int magic,tag;
    AVIOContext *pb = s->pb;
    unsigned int id, channels, rate, type;
    enum CodecID codec;
    AVStream *st;

    /* check ".snd" header */
    magic = avio_rl16(pb);
    tag = avio_rl32(pb);
    if (tag != MKTAG('S', 'O', 'L', 0))
        return -1;
    rate = avio_rl16(pb);
    type = avio_r8(pb);
    size = avio_rl32(pb);
    if (magic != 0x0B8D)
        avio_r8(pb); /* newer SOLs contain padding byte */

    codec = sol_codec_id(magic, type);
    channels = sol_channels(magic, type);

    if (codec == CODEC_ID_SOL_DPCM)
        id = sol_codec_type(magic, type);
    else id = 0;

    /* now we are ready: build format streams */
    st = av_new_stream(s, 0);
    if (!st)
        return -1;
    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_tag = id;
    st->codec->codec_id = codec;
    st->codec->channels = channels;
    st->codec->sample_rate = rate;
    av_set_pts_info(st, 64, 1, rate);
    return 0;
}