/**
* @file
- * Pulseaudio input
+ * PulseAudio input using the simple API.
* @author Luca Barbato <lu_zero@gentoo.org>
*
- * This avdevice decoder allows to capture audio from a Pulseaudio device using
- * the simple api.
*/
#include <pulse/simple.h>
int fragment_size;
pa_simple *s;
int64_t pts;
+ int64_t frame_duration;
} PulseData;
static pa_sample_format_t codec_id_to_pulse_format(int codec_id) {
device = s->filename;
pd->s = pa_simple_new(pd->server, pd->name,
- PA_STREAM_RECORD,
- device, pd->stream_name, &ss,
- NULL, &attr, &ret);
+ PA_STREAM_RECORD,
+ device, pd->stream_name, &ss,
+ NULL, &attr, &ret);
if (!pd->s) {
av_log(s, AV_LOG_ERROR, "pa_simple_new failed: %s\n",
av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
pd->pts = AV_NOPTS_VALUE;
+ pd->frame_duration = (pd->frame_size * 1000000LL * 8) /
+ (pd->sample_rate * pd->channels * av_get_bits_per_sample(codec_id));
return 0;
}
PulseData *pd = s->priv_data;
int res;
pa_usec_t latency;
- uint64_t frame_duration =
- (pd->frame_size*1000000LL)/(pd->sample_rate * pd->channels);
if (av_new_packet(pkt, pd->frame_size) < 0) {
return AVERROR(ENOMEM);
pd->pts = -latency;
}
- pd->pts += frame_duration;
-
pkt->pts = pd->pts;
+ pd->pts += pd->frame_duration;
+
return 0;
}
#define D AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
- { "server", "pulse server name",
- OFFSET(server), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, D },
- { "name", "application name",
- OFFSET(name), AV_OPT_TYPE_STRING, {.str = "libav"}, 0, 0, D },
- { "stream_name", "stream description",
- OFFSET(stream_name), AV_OPT_TYPE_STRING, {.str = "record"}, 0, 0, D },
- { "sample_rate", "",
- OFFSET(sample_rate), AV_OPT_TYPE_INT, {.dbl = 48000}, 1, INT_MAX, D },
- { "channels", "",
- OFFSET(channels), AV_OPT_TYPE_INT, {.dbl = 2}, 1, INT_MAX, D },
- { "frame_size", "",
- OFFSET(frame_size), AV_OPT_TYPE_INT, {.dbl = 1024}, 1, INT_MAX, D },
- { "fragment_size", "buffering size, affects latency and cpu usage",
- OFFSET(fragment_size), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX, D },
+ { "server", "pulse server name", OFFSET(server), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, D },
+ { "name", "application name", OFFSET(name), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, D },
+ { "stream_name", "stream description", OFFSET(stream_name), AV_OPT_TYPE_STRING, {.str = "record"}, 0, 0, D },
+ { "sample_rate", "sample rate in Hz", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.dbl = 48000}, 1, INT_MAX, D },
+ { "channels", "number of audio channels", OFFSET(channels), AV_OPT_TYPE_INT, {.dbl = 2}, 1, INT_MAX, D },
+ { "frame_size", "number of bytes per frame", OFFSET(frame_size), AV_OPT_TYPE_INT, {.dbl = 1024}, 1, INT_MAX, D },
+ { "fragment_size", "buffering size, affects latency and cpu usage", OFFSET(fragment_size), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX, D },
{ NULL },
};