u08 cmd_draw(const u08 *cmd, u08 len)
{
u08 result = 0;
switch(cmd[1]) {
case 'b':
result = cmd_draw_border(cmd+1,len-1);
break;
case 'r':
result = cmd_draw_rect(cmd+1,len-1);
break;
case 'g':
result = cmd_draw_grid(cmd+1,len-1);
break;
case 'h':
case 'v':
result = cmd_draw_line(cmd+1, len-1);
break;
case 'c':
result = cmd_chunk_define(cmd+1, len-1);
break;
case 'C':
/* no reply on start */
chunk_start();
return CMD_NO_REPLY;
default:
return CMD_UNKNOWN_ERR;
}
return result;
}
static int webm_chunk_write_packet(AVFormatContext *s, AVPacket *pkt)
{
WebMChunkContext *wc = s->priv_data;
AVFormatContext *oc = wc->avf;
AVStream *st = s->streams[pkt->stream_index];
int ret;
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
wc->duration_written += av_rescale_q(pkt->pts - wc->prev_pts,
st->time_base,
(AVRational) {1, 1000});
wc->prev_pts = pkt->pts;
}
// For video, a new chunk is started only on key frames. For audio, a new
// chunk is started based on chunk_duration.
if ((st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
(pkt->flags & AV_PKT_FLAG_KEY)) ||
(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
(pkt->pts == 0 || wc->duration_written >= wc->chunk_duration))) {
wc->duration_written = 0;
if ((ret = chunk_end(s)) < 0 || (ret = chunk_start(s)) < 0) {
goto fail;
}
}
ret = oc->oformat->write_packet(oc, pkt);
if (ret < 0)
goto fail;
fail:
if (ret < 0) {
oc->streams = NULL;
oc->nb_streams = 0;
avformat_free_context(oc);
}
return ret;
}
