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-rw-r--r--src/output_thread.c121
1 files changed, 121 insertions, 0 deletions
diff --git a/src/output_thread.c b/src/output_thread.c
new file mode 100644
index 000000000..eb86f0688
--- /dev/null
+++ b/src/output_thread.c
@@ -0,0 +1,121 @@
+/* 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 "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, size);
+ ao_command_finished(ao);
+}
+
+static void *audio_output_task(void *arg)
+{
+ struct audio_output *ao = arg;
+
+ notify_enter(&ao->notify);
+
+ while (1) {
+ switch (ao->command) {
+ case AO_COMMAND_NONE:
+ break;
+
+ case AO_COMMAND_OPEN:
+ assert(!ao->open);
+ ao->plugin->open(ao);
+ ao_command_finished(ao);
+ break;
+
+ case AO_COMMAND_CLOSE:
+ assert(ao->open);
+ ao->plugin->close(ao);
+ ao_command_finished(ao);
+ break;
+
+ case AO_COMMAND_PLAY:
+ ao_play(ao);
+ break;
+
+ case AO_COMMAND_CANCEL:
+ ao->plugin->cancel(ao);
+ ao_command_finished(ao);
+ break;
+
+ case AO_COMMAND_SEND_TAG:
+ ao->plugin->send_tag(ao, 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));
+}