[FFmpeg-cvslog] pulse: introduce pulseaudio input
Luca Barbato
git at videolan.org
Sat Oct 22 02:20:54 CEST 2011
ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Wed Oct 19 11:23:20 2011 -0700| [f5b09381698e77ef24300860fa5dd763cfa9b188] | committer: Luca Barbato
pulse: introduce pulseaudio input
It currently use the simple api and is using the latency information
provided only to offset the stream start.
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f5b09381698e77ef24300860fa5dd763cfa9b188
---
configure | 4 +
libavdevice/Makefile | 1 +
libavdevice/alldevices.c | 1 +
libavdevice/pulse.c | 192 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 198 insertions(+), 0 deletions(-)
diff --git a/configure b/configure
index a036873..009d26f 100755
--- a/configure
+++ b/configure
@@ -940,6 +940,7 @@ CONFIG_LIST="
libopencore_amrwb
libopencv
libopenjpeg
+ libpulse
librtmp
libschroedinger
libspeex
@@ -1458,6 +1459,7 @@ libcdio_indev_deps="libcdio"
libdc1394_indev_deps="libdc1394"
oss_indev_deps_any="soundcard_h sys_soundcard_h"
oss_outdev_deps_any="soundcard_h sys_soundcard_h"
+pulse_indev_deps="libpulse"
sndio_indev_deps="sndio_h"
sndio_outdev_deps="sndio_h"
v4l_indev_deps="linux_videodev_h"
@@ -2894,6 +2896,7 @@ enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_de
enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
enabled libopencv && require_pkg_config opencv opencv/cv.h cvCreateImageHeader
enabled libopenjpeg && require libopenjpeg openjpeg.h opj_version -lopenjpeg
+enabled libpulse && require_pkg_config libpulse-simple pulse/simple.h pa_simple_new
enabled librtmp && require_pkg_config librtmp librtmp/rtmp.h RTMP_Socket
enabled libschroedinger && require_pkg_config schroedinger-1.0 schroedinger/schro.h schro_init
enabled libspeex && require libspeex speex/speex.h speex_decoder_init -lspeex
@@ -3179,6 +3182,7 @@ echo "libopencore-amrnb support ${libopencore_amrnb-no}"
echo "libopencore-amrwb support ${libopencore_amrwb-no}"
echo "libopencv support ${libopencv-no}"
echo "libopenjpeg enabled ${libopenjpeg-no}"
+echo "libpulse enabled ${libpulse-no}"
echo "librtmp enabled ${librtmp-no}"
echo "libschroedinger enabled ${libschroedinger-no}"
echo "libspeex enabled ${libspeex-no}"
diff --git a/libavdevice/Makefile b/libavdevice/Makefile
index d8a5945..892b8a6 100644
--- a/libavdevice/Makefile
+++ b/libavdevice/Makefile
@@ -16,6 +16,7 @@ OBJS-$(CONFIG_FBDEV_INDEV) += fbdev.o
OBJS-$(CONFIG_JACK_INDEV) += jack_audio.o
OBJS-$(CONFIG_OSS_INDEV) += oss_audio.o
OBJS-$(CONFIG_OSS_OUTDEV) += oss_audio.o
+OBJS-$(CONFIG_PULSE_INDEV) += pulse.o
OBJS-$(CONFIG_SNDIO_INDEV) += sndio_common.o sndio_dec.o
OBJS-$(CONFIG_SNDIO_OUTDEV) += sndio_common.o sndio_enc.o
OBJS-$(CONFIG_V4L2_INDEV) += v4l2.o
diff --git a/libavdevice/alldevices.c b/libavdevice/alldevices.c
index a1a333f..e65644b 100644
--- a/libavdevice/alldevices.c
+++ b/libavdevice/alldevices.c
@@ -45,6 +45,7 @@ void avdevice_register_all(void)
REGISTER_INDEV (FBDEV, fbdev);
REGISTER_INDEV (JACK, jack);
REGISTER_INOUTDEV (OSS, oss);
+ REGISTER_INDEV (PULSE, pulse);
REGISTER_INOUTDEV (SNDIO, sndio);
REGISTER_INDEV (V4L2, v4l2);
#if FF_API_V4L
diff --git a/libavdevice/pulse.c b/libavdevice/pulse.c
new file mode 100644
index 0000000..f0d0571
--- /dev/null
+++ b/libavdevice/pulse.c
@@ -0,0 +1,192 @@
+/*
+ * Pulseaudio input
+ * Copyright (c) 2011 Luca Barbato <lu_zero at gentoo.org>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Pulseaudio input
+ * @author Luca Barbato <lu_zero at gentoo.org>
+ *
+ * This avdevice decoder allows to capture audio from a Pulseaudio device using
+ * the simple api.
+ *
+ */
+
+#include <pulse/simple.h>
+#include <pulse/rtclock.h>
+#include <pulse/error.h>
+
+#include "libavformat/avformat.h"
+#include "libavutil/opt.h"
+
+#define DEFAULT_CODEC_ID AV_NE(CODEC_ID_PCM_S16BE, CODEC_ID_PCM_S16LE)
+
+typedef struct PulseData {
+ AVClass *class;
+ char *server;
+ char *name;
+ char *dev;
+ char *stream_name;
+ int sample_rate;
+ int channels;
+ int frame_size;
+ pa_simple *s;
+ int64_t pts;
+} PulseData;
+
+static pa_sample_format_t codec_id_to_pulse_format(int codec_id) {
+ switch(codec_id) {
+ case CODEC_ID_PCM_U8: return PA_SAMPLE_U8;
+ case CODEC_ID_PCM_ALAW: return PA_SAMPLE_ALAW;
+ case CODEC_ID_PCM_MULAW: return PA_SAMPLE_ULAW;
+ case CODEC_ID_PCM_S16LE: return PA_SAMPLE_S16LE;
+ case CODEC_ID_PCM_S16BE: return PA_SAMPLE_S16BE;
+ case CODEC_ID_PCM_F32LE: return PA_SAMPLE_FLOAT32LE;
+ case CODEC_ID_PCM_F32BE: return PA_SAMPLE_FLOAT32BE;
+ case CODEC_ID_PCM_S32LE: return PA_SAMPLE_S32LE;
+ case CODEC_ID_PCM_S32BE: return PA_SAMPLE_S32BE;
+ case CODEC_ID_PCM_S24LE: return PA_SAMPLE_S24LE;
+ case CODEC_ID_PCM_S24BE: return PA_SAMPLE_S24BE;
+ default: return PA_SAMPLE_INVALID;
+ }
+}
+
+static av_cold int pulse_read_header(AVFormatContext *s,
+ AVFormatParameters *ap)
+{
+ PulseData *pd = s->priv_data;
+ AVStream *st;
+ int ret;
+ enum CodecID codec_id =
+ s->audio_codec_id == CODEC_ID_NONE ? DEFAULT_CODEC_ID : s->audio_codec_id;
+ const pa_sample_spec ss = { codec_id_to_pulse_format(codec_id),
+ pd->sample_rate,
+ pd->channels };
+
+ pa_buffer_attr attr = { -1 };
+
+ st = avformat_new_stream(s, NULL);
+
+ if (!st) {
+ av_log(s, AV_LOG_ERROR, "Cannot add stream\n");
+ return AVERROR(ENOMEM);
+ }
+
+ attr.fragsize = pd->frame_size * 4;
+
+ pd->s = pa_simple_new(pd->server, pd->name,
+ PA_STREAM_RECORD,
+ pd->dev, pd->stream_name, &ss,
+ NULL, &attr, &ret);
+ if (!pd->s) {
+ av_log(s, AV_LOG_ERROR, "pa_simple_new failed: %s\n",
+ pa_strerror(ret));
+ return AVERROR(EIO);
+ }
+ /* take real parameters */
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_id = codec_id;
+ st->codec->sample_rate = pd->sample_rate;
+ st->codec->channels = pd->channels;
+ av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
+
+ return 0;
+}
+
+static int pulse_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ PulseData *pd = s->priv_data;
+ int res;
+ pa_usec_t latency, cur;
+ 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);
+ }
+
+ cur = pa_rtclock_now();
+
+ if ((pa_simple_read(pd->s, pkt->data, pkt->size, &res)) < 0) {
+ av_log(s, AV_LOG_ERROR, "pa_simple_read failed: %s\n",
+ pa_strerror(res));
+ av_free_packet(pkt);
+ return AVERROR(EIO);
+ }
+
+ if ((latency = pa_simple_get_latency(pd->s, &res)) == (pa_usec_t) -1) {
+ av_log(s, AV_LOG_ERROR, "pa_simple_get_latency() failed: %s\n",
+ pa_strerror(res));
+ return AVERROR(EIO);
+ }
+
+ if (!pd->pts) {
+ pd->pts -= latency;
+ }
+
+ pd->pts += frame_duration;
+
+ av_log(s, AV_LOG_DEBUG, "%"PRId64" time %"PRId64","
+ " latency %"PRId64", %"PRId64"\n",
+ av_gettime(), cur, latency, pd->pts);
+
+ pkt->pts = pd->pts;
+
+ return 0;
+}
+
+static av_cold int pulse_close(AVFormatContext *s)
+{
+ PulseData *pd = s->priv_data;
+ pa_simple_free(pd->s);
+ return 0;
+}
+
+#define OFFSET(a) offsetof(PulseData, a)
+#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 },
+ { "dev", "device to use", OFFSET(dev), AV_OPT_TYPE_STRING, {.str = NULL}, 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 },
+ { NULL },
+};
+
+static const AVClass pulse_demuxer_class = {
+ .class_name = "Pulse demuxer",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_pulse_demuxer = {
+ .name = "pulse",
+ .long_name = NULL_IF_CONFIG_SMALL("Pulse audio input"),
+ .priv_data_size = sizeof(PulseData),
+ .read_header = pulse_read_header,
+ .read_packet = pulse_read_packet,
+ .read_close = pulse_close,
+ .flags = AVFMT_NOFILE,
+ .priv_class = &pulse_demuxer_class,
+};
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