int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
{
int i, r = AVERROR(ENOSYS);
if(!graph)
return r;
if((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
r=avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
if(r != AVERROR(ENOSYS))
return r;
}
if(res_len && res)
res[0]= 0;
for (i = 0; i < graph->filter_count; i++) {
AVFilterContext *filter = graph->filters[i];
if(!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)){
r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
if(r != AVERROR(ENOSYS)) {
if((flags & AVFILTER_CMD_FLAG_ONE) || r<0)
return r;
}
}
}
return r;
}
/* Update volume filter
*/
void BarPlayerSetVolume (player_t * const player) {
assert (player != NULL);
if (player->mode != PLAYER_PLAYING) {
return;
}
int ret;
#ifdef HAVE_AVFILTER_GRAPH_SEND_COMMAND
/* ffmpeg and libav disagree on the type of this option (string vs. double)
* -> print to string and let them parse it again */
char strbuf[16];
snprintf (strbuf, sizeof (strbuf), "%fdB",
player->settings->volume + player->gain);
assert (player->fgraph != NULL);
if ((ret = avfilter_graph_send_command (player->fgraph, "volume", "volume",
strbuf, NULL, 0, 0)) < 0) {
#else
/* convert from decibel */
const double volume = pow (10, (player->settings->volume + player->gain) / 20);
/* libav does not provide other means to set this right now. it might not
* even work everywhere. */
assert (player->fvolume != NULL);
if ((ret = av_opt_set_double (player->fvolume->priv, "volume", volume,
0)) != 0) {
#endif
printError (player->settings, "Cannot set volume", ret);
}
}
#define softfail(msg) \
printError (player->settings, msg, ret); \
return false;
/* ffmpeg callback for blocking functions, returns 1 to abort function
*/
static int intCb (void * const data) {
player_t * const player = data;
assert (player != NULL);
if (player->interrupted > 1) {
/* got a sigint multiple times, quit pianobar (handled by main.c). */
player->doQuit = true;
return 1;
} else if (player->interrupted != 0) {
/* the request is retried with the same player context */
player->interrupted = 0;
return 1;
} else {
return 0;
}
}
/* Update volume filter
*/
void BarPlayerSetVolume (player_t * const player) {
assert (player != NULL);
if (player->mode != PLAYER_PLAYING) {
return;
}
int ret;
#ifdef HAVE_AVFILTER_GRAPH_SEND_COMMAND
/* ffmpeg and libav disagree on the type of this option (string vs. double)
* -> print to string and let them parse it again */
char strbuf[16];
snprintf (strbuf, sizeof (strbuf), "%fdB",
player->settings->volume + player->gain);
assert (player->fgraph != NULL);
if ((ret = avfilter_graph_send_command (player->fgraph, "volume", "volume",
strbuf, NULL, 0, 0)) < 0) {
#else
/* convert from decibel */
const double volume = pow (10, (player->settings->volume + player->gain) / 20);
/* libav does not provide other means to set this right now. it might not
* even work everywhere. */
assert (player->fvolume != NULL);
if ((ret = av_opt_set_double (player->fvolume->priv, "volume", volume,
0)) != 0) {
#endif
printError (player->settings, "Cannot set volume", ret);
}
}
#define softfail(msg) \
printError (player->settings, msg, ret); \
return false;
#ifndef HAVE_AV_TIMEOUT
/* interrupt callback for libav, which lacks a timeout option
*
* obviously calling ping() a lot of times and then calling av_gettime here
* again is rather inefficient.
*/
static int intCb (void * const data) {
player_t * const player = data;
assert (player != NULL);
/* 10 seconds timeout (usec) */
return (av_gettime () - player->ping) > 10*1000000;
}
