omx: Add audio decoder base class and a subclass for MP3

1 files changed, 100 insertions, 0 deletions

diff --git a/omx/gstomxaudiodec.h b/omx/gstomxaudiodec.h
new file mode 100644
index 0000000..e7d5a26
--- /dev/null
+++ b/omx/gstomxaudiodec.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2014, Sebastian Dröge <sebastian@centricular.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_DEC_H__
+#define __GST_OMX_AUDIO_DEC_H__
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/audio/audio.h>
+#include <gst/audio/gstaudiodecoder.h>
+
+#include "gstomx.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_OMX_AUDIO_DEC \
+  (gst_omx_audio_dec_get_type())
+#define GST_OMX_AUDIO_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OMX_AUDIO_DEC,GstOMXAudioDec))
+#define GST_OMX_AUDIO_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OMX_AUDIO_DEC,GstOMXAudioDecClass))
+#define GST_OMX_AUDIO_DEC_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_OMX_AUDIO_DEC,GstOMXAudioDecClass))
+#define GST_IS_OMX_AUDIO_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OMX_AUDIO_DEC))
+#define GST_IS_OMX_AUDIO_DEC_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OMX_AUDIO_DEC))
+
+typedef struct _GstOMXAudioDec GstOMXAudioDec;
+typedef struct _GstOMXAudioDecClass GstOMXAudioDecClass;
+
+struct _GstOMXAudioDec
+{
+  GstAudioDecoder parent;
+
+  /* < protected > */
+  GstOMXComponent *dec;
+  GstOMXPort *dec_in_port, *dec_out_port;
+  
+  GstBufferPool *in_port_pool, *out_port_pool;
+
+  /* < private > */
+  GstAudioInfo info;
+  GstAudioChannelPosition position[OMX_AUDIO_MAXCHANNELS];
+  gint reorder_map[OMX_AUDIO_MAXCHANNELS];
+  gboolean needs_reorder;
+  GstBuffer *codec_data;
+  /* TRUE if the component is configured and saw
+   * the first buffer */
+  gboolean started;
+
+  GstClockTime last_upstream_ts;
+
+  /* Draining state */
+  GMutex drain_lock;
+  GCond drain_cond;
+  /* TRUE if EOS buffers shouldn't be forwarded */
+  gboolean draining;
+
+  /* TRUE if upstream is EOS */
+  gboolean eos;
+
+  GstFlowReturn downstream_flow_ret;
+};
+
+struct _GstOMXAudioDecClass
+{
+  GstAudioDecoderClass parent_class;
+
+  GstOMXClassData cdata;
+
+  gboolean (*is_format_change) (GstOMXAudioDec * self, GstOMXPort * port, GstCaps * caps);
+  gboolean (*set_format)       (GstOMXAudioDec * self, GstOMXPort * port, GstCaps * caps);
+  gint     (*get_samples_per_frame) (GstOMXAudioDec * self, GstOMXPort * port);
+};
+
+GType gst_omx_audio_dec_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_OMX_AUDIO_DEC_H__ */