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-rw-r--r--src/output_control.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/src/output_control.c b/src/output_control.c
new file mode 100644
index 000000000..a6a8cac74
--- /dev/null
+++ b/src/output_control.c
@@ -0,0 +1,123 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
+ * 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_control.h"
+#include "output_api.h"
+#include "pcm_utils.h"
+#include "utils.h"
+#include "audio.h"
+
+int openAudioOutput(struct audio_output *audioOutput,
+ const struct audio_format *audioFormat)
+{
+ int ret = 0;
+
+ if (audioOutput->open &&
+ 0 == cmpAudioFormat(audioFormat, &audioOutput->inAudioFormat)) {
+ return 0;
+ }
+
+ copyAudioFormat(&audioOutput->inAudioFormat, audioFormat);
+
+ if (audioOutput->convertAudioFormat) {
+ copyAudioFormat(&audioOutput->outAudioFormat,
+ &audioOutput->reqAudioFormat);
+ } else {
+ copyAudioFormat(&audioOutput->outAudioFormat,
+ &audioOutput->inAudioFormat);
+ if (audioOutput->open)
+ closeAudioOutput(audioOutput);
+ }
+
+ if (!audioOutput->open)
+ ret = audioOutput->plugin->open(audioOutput);
+
+ audioOutput->sameInAndOutFormats =
+ !cmpAudioFormat(&audioOutput->inAudioFormat,
+ &audioOutput->outAudioFormat);
+
+ return ret;
+}
+
+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;
+}
+
+int playAudioOutput(struct audio_output *audioOutput,
+ const char *playChunk, size_t size)
+{
+ int ret;
+
+ if (!audioOutput->open)
+ return -1;
+
+ if (!audioOutput->sameInAndOutFormats) {
+ convertAudioFormat(audioOutput, &playChunk, &size);
+ }
+
+ ret = audioOutput->plugin->play(audioOutput, playChunk, size);
+
+ return ret;
+}
+
+void dropBufferedAudioOutput(struct audio_output *audioOutput)
+{
+ if (audioOutput->open)
+ audioOutput->plugin->cancel(audioOutput);
+}
+
+void closeAudioOutput(struct audio_output *audioOutput)
+{
+ if (audioOutput->open)
+ audioOutput->plugin->close(audioOutput);
+}
+
+void finishAudioOutput(struct audio_output *audioOutput)
+{
+ closeAudioOutput(audioOutput);
+ if (audioOutput->plugin->finish)
+ audioOutput->plugin->finish(audioOutput);
+ if (audioOutput->convBuffer)
+ free(audioOutput->convBuffer);
+}
+
+void sendMetadataToAudioOutput(struct audio_output *audioOutput,
+ const struct tag *tag)
+{
+ if (audioOutput->plugin->send_tag)
+ audioOutput->plugin->send_tag(audioOutput, tag);
+}