250 lines
7.6 KiB
C
Executable File
250 lines
7.6 KiB
C
Executable File
/*
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* Pulseaudio common
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* Copyright (c) 2014 Lukasz Marek
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* Copyright (c) 2011 Luca Barbato <lu_zero@gentoo.org>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "pulse_audio_common.h"
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#include "libavutil/attributes.h"
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#include "libavutil/avstring.h"
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#include "libavutil/mem.h"
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#include "libavutil/avassert.h"
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pa_sample_format_t av_cold ff_codec_id_to_pulse_format(enum AVCodecID codec_id)
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{
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switch (codec_id) {
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case AV_CODEC_ID_PCM_U8: return PA_SAMPLE_U8;
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case AV_CODEC_ID_PCM_ALAW: return PA_SAMPLE_ALAW;
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case AV_CODEC_ID_PCM_MULAW: return PA_SAMPLE_ULAW;
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case AV_CODEC_ID_PCM_S16LE: return PA_SAMPLE_S16LE;
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case AV_CODEC_ID_PCM_S16BE: return PA_SAMPLE_S16BE;
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case AV_CODEC_ID_PCM_F32LE: return PA_SAMPLE_FLOAT32LE;
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case AV_CODEC_ID_PCM_F32BE: return PA_SAMPLE_FLOAT32BE;
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case AV_CODEC_ID_PCM_S32LE: return PA_SAMPLE_S32LE;
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case AV_CODEC_ID_PCM_S32BE: return PA_SAMPLE_S32BE;
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case AV_CODEC_ID_PCM_S24LE: return PA_SAMPLE_S24LE;
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case AV_CODEC_ID_PCM_S24BE: return PA_SAMPLE_S24BE;
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default: return PA_SAMPLE_INVALID;
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}
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}
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enum PulseAudioContextState {
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PULSE_CONTEXT_INITIALIZING,
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PULSE_CONTEXT_READY,
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PULSE_CONTEXT_FINISHED
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};
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typedef struct PulseAudioDeviceList {
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AVDeviceInfoList *devices;
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int error_code;
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int output;
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char *default_device;
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} PulseAudioDeviceList;
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static void pa_state_cb(pa_context *c, void *userdata)
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{
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enum PulseAudioContextState *context_state = userdata;
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switch (pa_context_get_state(c)) {
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case PA_CONTEXT_FAILED:
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case PA_CONTEXT_TERMINATED:
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*context_state = PULSE_CONTEXT_FINISHED;
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break;
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case PA_CONTEXT_READY:
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*context_state = PULSE_CONTEXT_READY;
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break;
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default:
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break;
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}
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}
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void ff_pulse_audio_disconnect_context(pa_mainloop **pa_ml, pa_context **pa_ctx)
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{
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av_assert0(pa_ml);
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av_assert0(pa_ctx);
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if (*pa_ctx) {
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pa_context_set_state_callback(*pa_ctx, NULL, NULL);
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pa_context_disconnect(*pa_ctx);
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pa_context_unref(*pa_ctx);
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}
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if (*pa_ml)
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pa_mainloop_free(*pa_ml);
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*pa_ml = NULL;
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*pa_ctx = NULL;
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}
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int ff_pulse_audio_connect_context(pa_mainloop **pa_ml, pa_context **pa_ctx,
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const char *server, const char *description)
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{
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int ret;
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pa_mainloop_api *pa_mlapi = NULL;
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enum PulseAudioContextState context_state = PULSE_CONTEXT_INITIALIZING;
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av_assert0(pa_ml);
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av_assert0(pa_ctx);
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*pa_ml = NULL;
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*pa_ctx = NULL;
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if (!(*pa_ml = pa_mainloop_new()))
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return AVERROR(ENOMEM);
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if (!(pa_mlapi = pa_mainloop_get_api(*pa_ml))) {
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ret = AVERROR_EXTERNAL;
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goto fail;
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}
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if (!(*pa_ctx = pa_context_new(pa_mlapi, description))) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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pa_context_set_state_callback(*pa_ctx, pa_state_cb, &context_state);
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if (pa_context_connect(*pa_ctx, server, 0, NULL) < 0) {
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ret = AVERROR_EXTERNAL;
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goto fail;
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}
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while (context_state == PULSE_CONTEXT_INITIALIZING)
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pa_mainloop_iterate(*pa_ml, 1, NULL);
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if (context_state == PULSE_CONTEXT_FINISHED) {
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ret = AVERROR_EXTERNAL;
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goto fail;
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}
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return 0;
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fail:
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ff_pulse_audio_disconnect_context(pa_ml, pa_ctx);
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return ret;
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}
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static void pulse_add_detected_device(PulseAudioDeviceList *info,
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const char *name, const char *description)
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{
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int ret;
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AVDeviceInfo *new_device = NULL;
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if (info->error_code)
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return;
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new_device = av_mallocz(sizeof(AVDeviceInfo));
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if (!new_device) {
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info->error_code = AVERROR(ENOMEM);
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return;
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}
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new_device->device_description = av_strdup(description);
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new_device->device_name = av_strdup(name);
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if (!new_device->device_description || !new_device->device_name) {
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info->error_code = AVERROR(ENOMEM);
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goto fail;
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}
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if ((ret = av_dynarray_add_nofree(&info->devices->devices,
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&info->devices->nb_devices, new_device)) < 0) {
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info->error_code = ret;
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goto fail;
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}
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return;
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fail:
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av_freep(&new_device->device_description);
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av_freep(&new_device->device_name);
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av_free(new_device);
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}
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static void pulse_audio_source_device_cb(pa_context *c, const pa_source_info *dev,
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int eol, void *userdata)
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{
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if (!eol)
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pulse_add_detected_device(userdata, dev->name, dev->description);
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}
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static void pulse_audio_sink_device_cb(pa_context *c, const pa_sink_info *dev,
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int eol, void *userdata)
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{
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if (!eol)
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pulse_add_detected_device(userdata, dev->name, dev->description);
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}
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static void pulse_server_info_cb(pa_context *c, const pa_server_info *i, void *userdata)
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{
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PulseAudioDeviceList *info = userdata;
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if (info->output)
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info->default_device = av_strdup(i->default_sink_name);
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else
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info->default_device = av_strdup(i->default_source_name);
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if (!info->default_device)
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info->error_code = AVERROR(ENOMEM);
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}
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int ff_pulse_audio_get_devices(AVDeviceInfoList *devices, const char *server, int output)
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{
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pa_mainloop *pa_ml = NULL;
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pa_operation *pa_op = NULL;
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pa_context *pa_ctx = NULL;
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enum pa_operation_state op_state;
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PulseAudioDeviceList dev_list = { 0 };
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int i;
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dev_list.output = output;
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dev_list.devices = devices;
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if (!devices)
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return AVERROR(EINVAL);
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devices->nb_devices = 0;
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devices->devices = NULL;
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if ((dev_list.error_code = ff_pulse_audio_connect_context(&pa_ml, &pa_ctx, server, "Query devices")) < 0)
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goto fail;
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if (output)
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pa_op = pa_context_get_sink_info_list(pa_ctx, pulse_audio_sink_device_cb, &dev_list);
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else
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pa_op = pa_context_get_source_info_list(pa_ctx, pulse_audio_source_device_cb, &dev_list);
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while ((op_state = pa_operation_get_state(pa_op)) == PA_OPERATION_RUNNING)
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pa_mainloop_iterate(pa_ml, 1, NULL);
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if (op_state != PA_OPERATION_DONE)
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dev_list.error_code = AVERROR_EXTERNAL;
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pa_operation_unref(pa_op);
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if (dev_list.error_code < 0)
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goto fail;
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pa_op = pa_context_get_server_info(pa_ctx, pulse_server_info_cb, &dev_list);
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while ((op_state = pa_operation_get_state(pa_op)) == PA_OPERATION_RUNNING)
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pa_mainloop_iterate(pa_ml, 1, NULL);
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if (op_state != PA_OPERATION_DONE)
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dev_list.error_code = AVERROR_EXTERNAL;
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pa_operation_unref(pa_op);
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if (dev_list.error_code < 0)
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goto fail;
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devices->default_device = -1;
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for (i = 0; i < devices->nb_devices; i++) {
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if (!strcmp(devices->devices[i]->device_name, dev_list.default_device)) {
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devices->default_device = i;
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break;
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}
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}
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fail:
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av_free(dev_list.default_device);
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ff_pulse_audio_disconnect_context(&pa_ml, &pa_ctx);
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return dev_list.error_code;
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}
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