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/*
* Pulseaudio common
* Copyright (c) 2014 Lukasz Marek
* Copyright (c) 2011 Luca Barbato <lu_zero@gentoo.org>
*
* 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_audio_common.h"
#include "libavutil/attributes.h"
#include "libavutil/avstring.h"
#include "libavutil/mem.h"
#include "libavutil/avassert.h"
pa_sample_format_t av_cold ff_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;
}
}
enum PulseAudioContextState {
PULSE_CONTEXT_INITIALIZING,
PULSE_CONTEXT_READY,
PULSE_CONTEXT_FINISHED
};
typedef struct PulseAudioDeviceList {
AVDeviceInfoList *devices;
int error_code;
int output;
char *default_device;
} PulseAudioDeviceList;
static void pa_state_cb(pa_context *c, void *userdata)
{
enum PulseAudioContextState *context_state = userdata;
switch (pa_context_get_state(c)) {
case PA_CONTEXT_FAILED:
case PA_CONTEXT_TERMINATED:
*context_state = PULSE_CONTEXT_FINISHED;
break;
case PA_CONTEXT_READY:
*context_state = PULSE_CONTEXT_READY;
break;
default:
break;
}
}
void ff_pulse_audio_disconnect_context(pa_mainloop **pa_ml, pa_context **pa_ctx)
{
av_assert0(pa_ml);
av_assert0(pa_ctx);
if (*pa_ctx) {
pa_context_set_state_callback(*pa_ctx, NULL, NULL);
pa_context_disconnect(*pa_ctx);
pa_context_unref(*pa_ctx);
}
if (*pa_ml)
pa_mainloop_free(*pa_ml);
*pa_ml = NULL;
*pa_ctx = NULL;
}
int ff_pulse_audio_connect_context(pa_mainloop **pa_ml, pa_context **pa_ctx,
const char *server, const char *description)
{
int ret;
pa_mainloop_api *pa_mlapi = NULL;
enum PulseAudioContextState context_state = PULSE_CONTEXT_INITIALIZING;
av_assert0(pa_ml);
av_assert0(pa_ctx);
*pa_ml = NULL;
*pa_ctx = NULL;
if (!(*pa_ml = pa_mainloop_new()))
return AVERROR(ENOMEM);
if (!(pa_mlapi = pa_mainloop_get_api(*pa_ml))) {
ret = AVERROR_EXTERNAL;
goto fail;
}
if (!(*pa_ctx = pa_context_new(pa_mlapi, description))) {
ret = AVERROR(ENOMEM);
goto fail;
}
pa_context_set_state_callback(*pa_ctx, pa_state_cb, &context_state);
if (pa_context_connect(*pa_ctx, server, 0, NULL) < 0) {
ret = AVERROR_EXTERNAL;
goto fail;
}
while (context_state == PULSE_CONTEXT_INITIALIZING)
pa_mainloop_iterate(*pa_ml, 1, NULL);
if (context_state == PULSE_CONTEXT_FINISHED) {
ret = AVERROR_EXTERNAL;
goto fail;
}
return 0;
fail:
ff_pulse_audio_disconnect_context(pa_ml, pa_ctx);
return ret;
}
static void pulse_add_detected_device(PulseAudioDeviceList *info,
const char *name, const char *description)
{
int ret;
AVDeviceInfo *new_device = NULL;
if (info->error_code)
return;
new_device = av_mallocz(sizeof(AVDeviceInfo));
if (!new_device) {
info->error_code = AVERROR(ENOMEM);
return;
}
new_device->device_description = av_strdup(description);
new_device->device_name = av_strdup(name);
if (!new_device->device_description || !new_device->device_name) {
info->error_code = AVERROR(ENOMEM);
goto fail;
}
if ((ret = av_dynarray_add_nofree(&info->devices->devices,
&info->devices->nb_devices, new_device)) < 0) {
info->error_code = ret;
goto fail;
}
return;
fail:
av_freep(&new_device->device_description);
av_freep(&new_device->device_name);
av_free(new_device);
}
static void pulse_audio_source_device_cb(pa_context *c, const pa_source_info *dev,
int eol, void *userdata)
{
if (!eol)
pulse_add_detected_device(userdata, dev->name, dev->description);
}
static void pulse_audio_sink_device_cb(pa_context *c, const pa_sink_info *dev,
int eol, void *userdata)
{
if (!eol)
pulse_add_detected_device(userdata, dev->name, dev->description);
}
static void pulse_server_info_cb(pa_context *c, const pa_server_info *i, void *userdata)
{
PulseAudioDeviceList *info = userdata;
if (info->output)
info->default_device = av_strdup(i->default_sink_name);
else
info->default_device = av_strdup(i->default_source_name);
if (!info->default_device)
info->error_code = AVERROR(ENOMEM);
}
int ff_pulse_audio_get_devices(AVDeviceInfoList *devices, const char *server, int output)
{
pa_mainloop *pa_ml = NULL;
pa_operation *pa_op = NULL;
pa_context *pa_ctx = NULL;
enum pa_operation_state op_state;
PulseAudioDeviceList dev_list = { 0 };
int i;
dev_list.output = output;
dev_list.devices = devices;
if (!devices)
return AVERROR(EINVAL);
devices->nb_devices = 0;
devices->devices = NULL;
if ((dev_list.error_code = ff_pulse_audio_connect_context(&pa_ml, &pa_ctx, server, "Query devices")) < 0)
goto fail;
if (output)
pa_op = pa_context_get_sink_info_list(pa_ctx, pulse_audio_sink_device_cb, &dev_list);
else
pa_op = pa_context_get_source_info_list(pa_ctx, pulse_audio_source_device_cb, &dev_list);
while ((op_state = pa_operation_get_state(pa_op)) == PA_OPERATION_RUNNING)
pa_mainloop_iterate(pa_ml, 1, NULL);
if (op_state != PA_OPERATION_DONE)
dev_list.error_code = AVERROR_EXTERNAL;
pa_operation_unref(pa_op);
if (dev_list.error_code < 0)
goto fail;
pa_op = pa_context_get_server_info(pa_ctx, pulse_server_info_cb, &dev_list);
while ((op_state = pa_operation_get_state(pa_op)) == PA_OPERATION_RUNNING)
pa_mainloop_iterate(pa_ml, 1, NULL);
if (op_state != PA_OPERATION_DONE)
dev_list.error_code = AVERROR_EXTERNAL;
pa_operation_unref(pa_op);
if (dev_list.error_code < 0)
goto fail;
devices->default_device = -1;
for (i = 0; i < devices->nb_devices; i++) {
if (!strcmp(devices->devices[i]->device_name, dev_list.default_device)) {
devices->default_device = i;
break;
}
}
fail:
av_free(dev_list.default_device);
ff_pulse_audio_disconnect_context(&pa_ml, &pa_ctx);
return dev_list.error_code;
}
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