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