omxaudiosink: Implements OpenMAX based audio sinks

Provides omxanalogaudiosink and omxhdmiaudiosink elements on
the Raspberry PI.

- omxanalogaudiosink is capable to render raw mono or stereo audio
through the jack output.
- omxhdmiaudiosink is capable to render raw audio up to 8 channels
and transmit ac3/dts(IEC 61937) through the HDMI output.
- sinks provide a clock derived from rendered samples
- sinks support the GstStreamVolume interface by implementing
the volume and mute properties.

https://bugzilla.gnome.org/show_bug.cgi?id=728962

1 files changed, 103 insertions, 0 deletions

diff --git a/omx/gstomxaudiosink.h b/omx/gstomxaudiosink.h
new file mode 100644
index 0000000..481b18a
--- /dev/null
+++ b/omx/gstomxaudiosink.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2014, Fluendo, S.A.
+ * Copyright (C) 2014, Metrological Media Innovations B.V.
+ *   Author: Josep Torra <josep@fluendo.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation
+ * version 2.1 of the License.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ */
+
+#ifndef __GST_OMX_AUDIO_SINK_H__
+#define __GST_OMX_AUDIO_SINK_H__
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/audio/audio.h>
+
+#include "gstomx.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_OMX_AUDIO_SINK \
+  (gst_omx_audio_sink_get_type())
+#define GST_OMX_AUDIO_SINK(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OMX_AUDIO_SINK,GstOMXAudioSink))
+#define GST_OMX_AUDIO_SINK_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OMX_AUDIO_SINK,GstOMXAudioSinkClass))
+#define GST_OMX_AUDIO_SINK_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_OMX_AUDIO_SINK,GstOMXAudioSinkClass))
+#define GST_IS_OMX_AUDIO_SINK(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OMX_AUDIO_SINK))
+#define GST_IS_OMX_AUDIO_SINK_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OMX_AUDIO_SINK))
+#define GST_OMX_AUDIO_SINK_CAST(obj)      ((GstOMXAudioSink *) (obj))
+
+#define GST_OMX_AUDIO_SINK_GET_LOCK(obj)	(&GST_OMX_AUDIO_SINK_CAST (obj)->lock)
+#define GST_OMX_AUDIO_SINK_LOCK(obj)	    (g_mutex_lock (GST_OMX_AUDIO_SINK_GET_LOCK (obj)))
+#define GST_OMX_AUDIO_SINK_UNLOCK(obj)    (g_mutex_unlock (GST_OMX_AUDIO_SINK_GET_LOCK (obj)))
+
+#define PASSTHROUGH_CAPS \
+    "audio/x-ac3, framed = (boolean) true;" \
+    "audio/x-eac3, framed = (boolean) true; " \
+    "audio/x-dts, framed = (boolean) true, " \
+      "block-size = (int) { 512, 1024, 2048 }; " \
+    "audio/mpeg, mpegversion = (int) 1, " \
+      "mpegaudioversion = (int) [ 1, 2 ], parsed = (boolean) true;"
+
+typedef struct _GstOMXAudioSink GstOMXAudioSink;
+typedef struct _GstOMXAudioSinkClass GstOMXAudioSinkClass;
+
+struct _GstOMXAudioSink
+{
+  GstAudioSink parent;
+
+  /* < protected > */
+  GstOMXComponent *comp;
+  GstOMXPort *in_port, *out_port;
+  
+  gboolean mute;
+  gdouble volume;
+
+  gboolean iec61937;
+  guint endianness;
+  guint rate;
+  guint channels;
+  guint width;
+  gboolean is_signed;
+  gboolean is_float;
+
+  guint buffer_size;
+  guint samples;
+
+  GMutex lock;
+};
+
+struct _GstOMXAudioSinkClass
+{
+  GstAudioSinkClass parent_class;
+
+  GstOMXClassData cdata;
+  const gchar * destination;
+};
+
+GType gst_omx_audio_sink_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_OMX_AUDIO_SINK_H__ */
+