Function dv_extract_pack

libavformat/dv.c:99–129

}

static const uint8_t *dv_extract_pack(const uint8_t *frame, enum DVPackType t)
{
    int offs;
    int c;

    for (c = 0; c < 10; c++) {
        switch (t) {
        case DV_AUDIO_SOURCE:
            if (c&1)    offs = (80 * 6 + 80 * 16 * 0 + 3 + c*12000);
            else        offs = (80 * 6 + 80 * 16 * 3 + 3 + c*12000);
            break;
        case DV_AUDIO_CONTROL:
            if (c&1)    offs = (80 * 6 + 80 * 16 * 1 + 3 + c*12000);
            else        offs = (80 * 6 + 80 * 16 * 4 + 3 + c*12000);
            break;
        case DV_VIDEO_CONTROL:
            if (c&1)    offs = (80 * 3 + 8      + c*12000);
            else        offs = (80 * 5 + 48 + 5 + c*12000);
            break;
        case DV_TIMECODE:
            offs = (80*1 + 3 + 3);
            break;
        default:
            return NULL;
        }
        if (frame[offs] == t)
            break;
    }

    return frame[offs] == t ? &frame[offs] : NULL;
}

static const int dv_audio_frequency[3] = {
    48000, 44100, 32000,