/* player thread; for every song a new thread is started
* @param audioPlayer structure
* @return PLAYER_RET_*
*/
void *BarPlayerThread (void *data) {
assert (data != NULL);
player_t * const player = data;
uintptr_t pret = PLAYER_RET_OK;
bool retry;
do {
retry = false;
if (openStream (player)) {
if (openFilter (player) && openDevice (player)) {
player->mode = PLAYER_PLAYING;
BarPlayerSetVolume (player);
retry = play (player) == AVERROR_INVALIDDATA &&
!player->interrupted;
} else {
/* filter missing or audio device busy */
pret = PLAYER_RET_HARDFAIL;
}
} else {
/* stream not found */
pret = PLAYER_RET_SOFTFAIL;
}
player->mode = PLAYER_WAITING;
finish (player);
} while (retry);
player->mode = PLAYER_FINISHED;
return (void *) pret;
}
/* setup filter chain
*/
static bool openFilter (player_t * const player) {
/* filter setup */
char strbuf[256];
int ret = 0;
AVCodecContext * const cctx = player->st->codec;
if ((player->fgraph = avfilter_graph_alloc ()) == NULL) {
softfail ("graph_alloc");
}
/* abuffer */
AVRational time_base = player->st->time_base;
snprintf (strbuf, sizeof (strbuf),
"time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%"PRIx64,
time_base.num, time_base.den, cctx->sample_rate,
av_get_sample_fmt_name (cctx->sample_fmt),
cctx->channel_layout);
if ((ret = avfilter_graph_create_filter (&player->fabuf,
avfilter_get_by_name ("abuffer"), NULL, strbuf, NULL,
player->fgraph)) < 0) {
softfail ("create_filter abuffer");
}
/* volume */
if ((ret = avfilter_graph_create_filter (&player->fvolume,
avfilter_get_by_name ("volume"), NULL, NULL, NULL,
player->fgraph)) < 0) {
softfail ("create_filter volume");
}
BarPlayerSetVolume (player);
/* aformat: convert float samples into something more usable */
AVFilterContext *fafmt = NULL;
snprintf (strbuf, sizeof (strbuf), "sample_fmts=%s",
av_get_sample_fmt_name (avformat));
if ((ret = avfilter_graph_create_filter (&fafmt,
avfilter_get_by_name ("aformat"), NULL, strbuf, NULL,
player->fgraph)) < 0) {
softfail ("create_filter aformat");
}
/* abuffersink */
if ((ret = avfilter_graph_create_filter (&player->fbufsink,
avfilter_get_by_name ("abuffersink"), NULL, NULL, NULL,
player->fgraph)) < 0) {
softfail ("create_filter abuffersink");
}
/* connect filter: abuffer -> volume -> aformat -> abuffersink */
if (avfilter_link (player->fabuf, 0, player->fvolume, 0) != 0 ||
avfilter_link (player->fvolume, 0, fafmt, 0) != 0 ||
avfilter_link (fafmt, 0, player->fbufsink, 0) != 0) {
softfail ("filter_link");
}
if ((ret = avfilter_graph_config (player->fgraph, NULL)) < 0) {
softfail ("graph_config");
}
return true;
}
