Exemple #1
0
static int peak_write_chunk(AVFormatContext *s)
{
    WAVMuxContext *wav = s->priv_data;
    AVIOContext *pb = s->pb;
    AVCodecContext *enc = s->streams[0]->codec;
    int64_t peak = ff_start_tag(s->pb, "levl");
    int64_t now0;
    time_t now_secs;
    char timestamp[28];

    /* Peak frame of incomplete block at end */
    if (wav->peak_block_pos)
        peak_write_frame(s);

    memset(timestamp, 0, sizeof(timestamp));
    if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
        struct tm tmpbuf;
        av_log(s, AV_LOG_INFO, "Writing local time and date to Peak Envelope Chunk\n");
        now0 = av_gettime();
        now_secs = now0 / 1000000;
        if (strftime(timestamp, sizeof(timestamp), "%Y:%m:%d:%H:%M:%S:", localtime_r(&now_secs, &tmpbuf))) {
            av_strlcatf(timestamp, sizeof(timestamp), "%03d", (int)((now0 / 1000) % 1000));
        } else {
            av_log(s, AV_LOG_ERROR, "Failed to write timestamp\n");
            return -1;
        }
    }

    avio_wl32(pb, 1);                           /* version */
    avio_wl32(pb, wav->peak_format);            /* 8 or 16 bit */
    avio_wl32(pb, wav->peak_ppv);               /* positive and negative */
    avio_wl32(pb, wav->peak_block_size);        /* frames per value */
    avio_wl32(pb, enc->channels);               /* number of channels */
    avio_wl32(pb, wav->peak_num_frames);        /* number of peak frames */
    avio_wl32(pb, wav->peak_pos_pop);           /* audio sample frame index */
    avio_wl32(pb, 128);                         /* equal to size of header */
    avio_write(pb, timestamp, 28);              /* ASCII time stamp */
    ffio_fill(pb, 0, 60);

    avio_write(pb, wav->peak_output, wav->peak_outbuf_bytes);

    ff_end_tag(pb, peak);

    if (!wav->data)
        wav->data = peak;

    return 0;
}
Exemple #2
0
static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    AVIOContext *pb  = s->pb;
    WAVMuxContext    *wav = s->priv_data;

    if (wav->write_peak != 2)
        avio_write(pb, pkt->data, pkt->size);

    if (wav->write_peak) {
        int c = 0;
        int i;
        for (i = 0; i < pkt->size; i += wav->peak_bps) {
            if (wav->peak_bps == 1) {
                wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], *(int8_t*)(pkt->data + i));
                wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], *(int8_t*)(pkt->data + i));
            } else {
                wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], (int16_t)AV_RL16(pkt->data + i));
                wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], (int16_t)AV_RL16(pkt->data + i));
            }
            if (++c == s->streams[0]->codec->channels) {
                c = 0;
                if (++wav->peak_block_pos == wav->peak_block_size) {
                    peak_write_frame(s);
                    wav->peak_block_pos = 0;
                }
            }
        }
    }

    if(pkt->pts != AV_NOPTS_VALUE) {
        wav->minpts        = FFMIN(wav->minpts, pkt->pts);
        wav->maxpts        = FFMAX(wav->maxpts, pkt->pts);
        wav->last_duration = pkt->duration;
    } else
        av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
    return 0;
}