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mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00

lavd: pulse audio encoder

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Lukasz Marek 2013-10-04 11:49:07 +02:00 committed by Michael Niedermayer
parent 8c0f565ee3
commit 361b56c379
7 changed files with 211 additions and 2 deletions

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@ -39,6 +39,7 @@ version <next>
- native VP9 decoder
- dpx parser
- max_error_rate parameter in ffmpeg
- PulseAudio output device
version 2.0:

1
configure vendored
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@ -2134,6 +2134,7 @@ openal_indev_deps="openal"
oss_indev_deps_any="soundcard_h sys_soundcard_h"
oss_outdev_deps_any="soundcard_h sys_soundcard_h"
pulse_indev_deps="libpulse"
pulse_outdev_deps="libpulse"
sdl_outdev_deps="sdl"
sndio_indev_deps="sndio_h"
sndio_outdev_deps="sndio_h"

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@ -108,6 +108,41 @@ ffmpeg -i INPUT -pix_fmt rgb24 -f caca -list_dither colors -
OSS (Open Sound System) output device.
@section pulse
PulseAudio output device.
To enable this output device you need to configure FFmpeg with @code{--enable-libpulse}.
More information about PulseAudio can be found on @url{http://www.pulseaudio.org}
@subsection Options
@table @option
@item server
Connect to a specific PulseAudio server, specified by an IP address.
Default server is used when not provided.
@item name
Specify the application name PulseAudio will use when showing active clients,
by default it is the @code{LIBAVFORMAT_IDENT} string.
@item stream_name
Specify the stream name PulseAudio will use when showing active streams,
by default it is set to the specified output name.
@item device
Specify the device to use. Default device is used when not provided.
List of output devices can be obtained with command @command{pactl list sinks}.
@end table
@subsection Examples
Play a file on default device on default server:
@example
ffmpeg -i INPUT -f pulse "stream name"
@end example
@section sdl
SDL (Simple DirectMedia Layer) output device.

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@ -31,6 +31,7 @@ OBJS-$(CONFIG_OPENAL_INDEV) += openal-dec.o
OBJS-$(CONFIG_OSS_INDEV) += oss_audio.o
OBJS-$(CONFIG_OSS_OUTDEV) += oss_audio.o
OBJS-$(CONFIG_PULSE_INDEV) += pulse.o
OBJS-$(CONFIG_PULSE_OUTDEV) += pulse_audio_enc.o
OBJS-$(CONFIG_SDL_OUTDEV) += sdl.o
OBJS-$(CONFIG_SNDIO_INDEV) += sndio_common.o sndio_dec.o
OBJS-$(CONFIG_SNDIO_OUTDEV) += sndio_common.o sndio_enc.o

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@ -57,7 +57,7 @@ void avdevice_register_all(void)
REGISTER_INDEV (LAVFI, lavfi);
REGISTER_INDEV (OPENAL, openal);
REGISTER_INOUTDEV(OSS, oss);
REGISTER_INDEV (PULSE, pulse);
REGISTER_INOUTDEV(PULSE, pulse);
REGISTER_OUTDEV (SDL, sdl);
REGISTER_INOUTDEV(SNDIO, sndio);
REGISTER_INOUTDEV(V4L2, v4l2);

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@ -0,0 +1,171 @@
/*
* Copyright (c) 2013 Lukasz Marek <lukasz.m.luki@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <pulse/simple.h>
#include <pulse/error.h>
#include "libavutil/opt.h"
#include "libavutil/time.h"
#include "libavutil/log.h"
#include "libavformat/avformat.h"
#include "libavformat/internal.h"
typedef struct PulseData {
AVClass *class;
const char *server;
const char *name;
const char *stream_name;
const char *device;
pa_simple *pa;
unsigned int stream_index;
} PulseData;
static pa_sample_format_t codec_id_to_pulse_format(enum AVCodecID codec_id)
{
switch (codec_id) {
case AV_CODEC_ID_PCM_U8: return PA_SAMPLE_U8;
case AV_CODEC_ID_PCM_ALAW: return PA_SAMPLE_ALAW;
case AV_CODEC_ID_PCM_MULAW: return PA_SAMPLE_ULAW;
case AV_CODEC_ID_PCM_S16LE: return PA_SAMPLE_S16LE;
case AV_CODEC_ID_PCM_S16BE: return PA_SAMPLE_S16BE;
case AV_CODEC_ID_PCM_F32LE: return PA_SAMPLE_FLOAT32LE;
case AV_CODEC_ID_PCM_F32BE: return PA_SAMPLE_FLOAT32BE;
case AV_CODEC_ID_PCM_S32LE: return PA_SAMPLE_S32LE;
case AV_CODEC_ID_PCM_S32BE: return PA_SAMPLE_S32BE;
case AV_CODEC_ID_PCM_S24LE: return PA_SAMPLE_S24LE;
case AV_CODEC_ID_PCM_S24BE: return PA_SAMPLE_S24BE;
default: return PA_SAMPLE_INVALID;
}
}
static av_cold int pulse_write_header(AVFormatContext *h)
{
PulseData *s = h->priv_data;
AVStream *st = NULL;
int ret;
pa_sample_spec ss;
pa_buffer_attr attr = { -1, -1, -1, -1, -1 };
const char *stream_name = s->stream_name;
for (unsigned i = 0; i < h->nb_streams; i++) {
if (h->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
st = h->streams[i];
s->stream_index = i;
break;
}
}
if (!st) {
av_log(s, AV_LOG_ERROR, "No audio stream found.\n");
return AVERROR(EINVAL);
}
if (!stream_name)
stream_name = h->filename;
ss.format = codec_id_to_pulse_format(st->codec->codec_id);
ss.rate = st->codec->sample_rate;
ss.channels = st->codec->channels;
s->pa = pa_simple_new(s->server, // Server
s->name, // Application name
PA_STREAM_PLAYBACK,
s->device, // Device
stream_name, // Description of a stream
&ss, // Sample format
NULL, // Use default channel map
&attr, // Buffering attributes
&ret); // Result
if (!s->pa) {
av_log(s, AV_LOG_ERROR, "pa_simple_new failed: %s\n", pa_strerror(ret));
return AVERROR(EIO);
}
avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
return 0;
}
static av_cold int pulse_write_trailer(AVFormatContext *h)
{
PulseData *s = h->priv_data;
pa_simple_flush(s->pa, NULL);
pa_simple_free(s->pa);
s->pa = NULL;
return 0;
}
static int pulse_write_packet(AVFormatContext *h, AVPacket *pkt)
{
PulseData *s = h->priv_data;
int size = pkt->size;
uint8_t *buf = pkt->data;
int error;
if (s->stream_index != pkt->stream_index)
return 0;
if ((error = pa_simple_write(s->pa, buf, size, &error))) {
av_log(s, AV_LOG_ERROR, "pa_simple_write failed: %s\n", pa_strerror(error));
return AVERROR(EIO);
}
return 0;
}
static void pulse_get_output_timestamp(AVFormatContext *h, int stream, int64_t *dts, int64_t *wall)
{
PulseData *s = h->priv_data;
pa_usec_t latency = pa_simple_get_latency(s->pa, NULL);
*wall = av_gettime();
*dts = h->streams[0]->cur_dts - latency;
}
#define OFFSET(a) offsetof(PulseData, a)
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "server", "set PulseAudio server", OFFSET(server), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
{ "name", "set application name", OFFSET(name), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, E },
{ "stream_name", "set stream description", OFFSET(stream_name), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
{ "device", "set device name", OFFSET(device), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
{ NULL }
};
static const AVClass pulse_muxer_class = {
.class_name = "Pulse muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_pulse_muxer = {
.name = "pulse",
.long_name = NULL_IF_CONFIG_SMALL("Pulse audio output"),
.priv_data_size = sizeof(PulseData),
.audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
.video_codec = AV_CODEC_ID_NONE,
.write_header = pulse_write_header,
.write_packet = pulse_write_packet,
.write_trailer = pulse_write_trailer,
.get_output_timestamp = pulse_get_output_timestamp,
.flags = AVFMT_NOFILE,
.priv_class = &pulse_muxer_class,
};

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@ -28,7 +28,7 @@
#include "libavutil/avutil.h"
#define LIBAVDEVICE_VERSION_MAJOR 55
#define LIBAVDEVICE_VERSION_MINOR 3
#define LIBAVDEVICE_VERSION_MINOR 4
#define LIBAVDEVICE_VERSION_MICRO 100
#define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \