static void 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; 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)); } 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; }