148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
/* the Music Player Daemon (MPD)
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* Copyright (C) 2008 Max Kellermann <max@duempel.org>
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* This project's homepage is: http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "output_thread.h"
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#include "output_api.h"
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#include "output_internal.h"
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#include "utils.h"
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#include <assert.h>
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static void ao_command_finished(struct audio_output *ao)
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{
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assert(ao->command != AO_COMMAND_NONE);
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ao->command = AO_COMMAND_NONE;
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notify_signal(&audio_output_client_notify);
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}
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static void convertAudioFormat(struct audio_output *audioOutput,
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const char **chunkArgPtr, size_t *sizeArgPtr)
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{
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size_t size = pcm_sizeOfConvBuffer(&(audioOutput->inAudioFormat),
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*sizeArgPtr,
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&(audioOutput->outAudioFormat));
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if (size > audioOutput->convBufferLen) {
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if (audioOutput->convBuffer != NULL)
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free(audioOutput->convBuffer);
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audioOutput->convBuffer = xmalloc(size);
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audioOutput->convBufferLen = size;
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}
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*sizeArgPtr = pcm_convertAudioFormat(&(audioOutput->inAudioFormat),
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*chunkArgPtr, *sizeArgPtr,
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&(audioOutput->outAudioFormat),
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audioOutput->convBuffer,
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&audioOutput->convState);
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*chunkArgPtr = audioOutput->convBuffer;
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}
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static void ao_play(struct audio_output *ao)
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{
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const char *data = ao->args.play.data;
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size_t size = ao->args.play.size;
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if (!audio_format_equals(&ao->inAudioFormat, &ao->outAudioFormat))
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convertAudioFormat(ao, &data, &size);
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ao->result = ao->plugin->play(ao->data, data, size);
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ao_command_finished(ao);
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}
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static void ao_pause(struct audio_output *ao)
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{
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if (ao->plugin->pause != NULL) {
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/* pause is supported */
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ao_command_finished(ao);
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ao->plugin->pause(ao->data);
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} else {
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/* pause is not supported - simply close the device */
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ao->plugin->close(ao->data);
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ao->open = 0;
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ao_command_finished(ao);
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}
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}
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static void *audio_output_task(void *arg)
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{
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struct audio_output *ao = arg;
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while (1) {
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switch (ao->command) {
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case AO_COMMAND_NONE:
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break;
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case AO_COMMAND_OPEN:
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assert(!ao->open);
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ao->result = ao->plugin->open(ao->data,
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&ao->outAudioFormat);
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assert(!ao->open);
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if (ao->result == 0)
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ao->open = 1;
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ao_command_finished(ao);
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break;
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case AO_COMMAND_CLOSE:
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assert(ao->open);
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ao->plugin->close(ao->data);
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ao->open = 0;
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ao_command_finished(ao);
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break;
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case AO_COMMAND_PLAY:
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ao_play(ao);
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break;
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case AO_COMMAND_PAUSE:
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ao_pause(ao);
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break;
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case AO_COMMAND_CANCEL:
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ao->plugin->cancel(ao->data);
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ao_command_finished(ao);
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break;
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case AO_COMMAND_SEND_TAG:
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ao->plugin->send_tag(ao->data, ao->args.tag);
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ao_command_finished(ao);
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break;
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case AO_COMMAND_KILL:
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ao_command_finished(ao);
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return NULL;
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}
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notify_wait(&ao->notify);
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}
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}
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void audio_output_thread_start(struct audio_output *ao)
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{
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pthread_attr_t attr;
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assert(ao->command == AO_COMMAND_NONE);
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pthread_attr_init(&attr);
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
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if (pthread_create(&ao->thread, &attr, audio_output_task, ao))
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FATAL("Failed to spawn output task: %s\n", strerror(errno));
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}
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