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;
}
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;
}