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lavd/pulse_audio_common: add device detecting code 

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
This commit is contained in:
Lukasz Marek 2014-02-25 01:03:56 +01:00
parent cd50a44beb
commit 85ed32d2ed
2 changed files with 180 additions and 2 deletions
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177
libavdevice/pulse_audio_common.c
View File

@ -1,5 +1,6 @@
/*
* Pulseaudio input
* Pulseaudio common
* Copyright (c) 2014 Lukasz Marek
* Copyright (c) 2011 Luca Barbato <lu_zero@gentoo.org>
*
* This file is part of FFmpeg.
@ -21,6 +22,8 @@
#include "pulse_audio_common.h"
#include "libavutil/attributes.h"
#include "libavutil/avstring.h"
#include "libavutil/mem.h"
pa_sample_format_t av_cold ff_codec_id_to_pulse_format(enum AVCodecID codec_id)
{
@ -39,3 +42,175 @@ pa_sample_format_t av_cold ff_codec_id_to_pulse_format(enum AVCodecID codec_id)
default: return PA_SAMPLE_INVALID;
}
}
enum PulseAudioLoopState {
PA_LOOP_INITIALIZING,
PA_LOOP_READY,
PA_LOOP_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 PulseAudioLoopState *loop_status = userdata;
switch (pa_context_get_state(c)) {
case PA_CONTEXT_FAILED:
case PA_CONTEXT_TERMINATED:
*loop_status = PA_LOOP_FINISHED;
break;
case PA_CONTEXT_READY:
*loop_status = PA_LOOP_READY;
break;
default:
break;
}
}
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_free(new_device->device_description);
av_free(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_mainloop_api *pa_mlapi = NULL;
pa_operation *pa_op = NULL;
pa_context *pa_ctx = NULL;
enum pa_operation_state op_state;
enum PulseAudioLoopState loop_state = PA_LOOP_INITIALIZING;
PulseAudioDeviceList dev_list = { 0 };
int i;
dev_list.output = output;
dev_list.devices = devices;
devices->nb_devices = 0;
devices->devices = NULL;
if (!devices)
return AVERROR(EINVAL);
if (!(pa_ml = pa_mainloop_new()))
return AVERROR(ENOMEM);
if (!(pa_mlapi = pa_mainloop_get_api(pa_ml))) {
dev_list.error_code = AVERROR_EXTERNAL;
goto fail;
}
if (!(pa_ctx = pa_context_new(pa_mlapi, "Query devices"))) {
dev_list.error_code = AVERROR(ENOMEM);
goto fail;
}
pa_context_set_state_callback(pa_ctx, pa_state_cb, &loop_state);
if (pa_context_connect(pa_ctx, server, 0, NULL) < 0) {
dev_list.error_code = AVERROR_EXTERNAL;
goto fail;
}
while (loop_state == PA_LOOP_INITIALIZING)
pa_mainloop_iterate(pa_ml, 1, NULL);
if (loop_state == PA_LOOP_FINISHED) {
dev_list.error_code = AVERROR_EXTERNAL;
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);
if(pa_ctx)
pa_context_disconnect(pa_ctx);
if (pa_ctx)
pa_context_unref(pa_ctx);
if (pa_ml)
pa_mainloop_free(pa_ml);
return dev_list.error_code;
}

5
libavdevice/pulse_audio_common.h
View File

@ -22,9 +22,12 @@
#ifndef AVDEVICE_PULSE_AUDIO_COMMON_H
#define AVDEVICE_PULSE_AUDIO_COMMON_H
#include <pulse/simple.h>
#include <pulse/pulseaudio.h>
#include "libavcodec/avcodec.h"
#include "avdevice.h"
pa_sample_format_t ff_codec_id_to_pulse_format(enum AVCodecID codec_id);
int ff_pulse_audio_get_devices(AVDeviceInfoList *devices, const char *server, int output);
#endif /* AVDEVICE_PULSE_AUDIO_COMMON_H */