Merge branch 'plugin-move-opus'

Move Opus decoder and encoder from -bad to -base.

https://bugzilla.gnome.org/show_bug.cgi?id=756282

ext/opus/Makefile.am

+plugin_LTLIBRARIES = libgstopus.la
+
+libgstopus_la_SOURCES = gstopus.c gstopusdec.c gstopusenc.c gstopusparse.c gstopusheader.c gstopuscommon.c gstrtpopuspay.c gstrtpopusdepay.c
+libgstopus_la_CFLAGS = \
+        -DGST_USE_UNSTABLE_API \
+	$(GST_PLUGINS_BAD_CFLAGS) \
+	$(GST_PLUGINS_BASE_CFLAGS) \
+	$(GST_CFLAGS) \
+	$(OPUS_CFLAGS)
+libgstopus_la_LIBADD = \
+	$(GST_PLUGINS_BASE_LIBS) -lgstaudio-$(GST_API_VERSION) \
+	-lgsttag-$(GST_API_VERSION) -lgstrtp-$(GST_API_VERSION) \
+	-lgstpbutils-$(GST_API_VERSION) \
+	$(GST_BASE_LIBS) \
+	$(GST_LIBS) \
+	$(OPUS_LIBS)
+libgstopus_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) $(LIBM)
+libgstopus_la_LIBTOOLFLAGS = $(GST_PLUGIN_LIBTOOLFLAGS)
+
+noinst_HEADERS = gstopusenc.h gstopusdec.h gstopusparse.h gstopusheader.h gstopuscommon.h gstrtpopuspay.h gstrtpopusdepay.h

ext/opus/gstopus.c

+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2008> Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gstopusdec.h"
+#include "gstopusenc.h"
+#include "gstopusparse.h"
+
+#include "gstrtpopuspay.h"
+#include "gstrtpopusdepay.h"
+
+#include <gst/tag/tag.h>
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+
+  if (!gst_element_register (plugin, "opusenc", GST_RANK_PRIMARY,
+          GST_TYPE_OPUS_ENC))
+    return FALSE;
+
+  if (!gst_element_register (plugin, "opusdec", GST_RANK_PRIMARY,
+          GST_TYPE_OPUS_DEC))
+    return FALSE;
+
+  if (!gst_element_register (plugin, "opusparse", GST_RANK_NONE,
+          GST_TYPE_OPUS_PARSE))
+    return FALSE;
+
+  if (!gst_element_register (plugin, "rtpopusdepay", GST_RANK_SECONDARY,
+          GST_TYPE_RTP_OPUS_DEPAY))
+    return FALSE;
+
+  if (!gst_element_register (plugin, "rtpopuspay", GST_RANK_SECONDARY,
+          GST_TYPE_RTP_OPUS_PAY))
+    return FALSE;
+
+  gst_tag_register_musicbrainz_tags ();
+
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    opus,
+    "OPUS plugin library",
+    plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

ext/opus/gstopuscommon.c

+/* GStreamer
+ * Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "gstopuscommon.h"
+
+/* http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-800004.3.9 */
+/* copy of the same structure in the vorbis plugin */
+const GstAudioChannelPosition gst_opus_channel_positions[][8] = {
+  {                             /* Mono */
+      GST_AUDIO_CHANNEL_POSITION_MONO},
+  {                             /* Stereo */
+        GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+      GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT},
+  {                             /* Stereo + Centre */
+        GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
+      GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT},
+  {                             /* Quadraphonic */
+        GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
+      },
+  {                             /* Stereo + Centre + rear stereo */
+        GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
+      },
+  {                             /* Full 5.1 Surround */
+        GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_LFE1,
+      },
+  {                             /* 6.1 Surround, in Vorbis spec since 2010-01-13 */
+        GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_CENTER,
+      GST_AUDIO_CHANNEL_POSITION_LFE1},
+  {                             /* 7.1 Surround, in Vorbis spec since 2010-01-13 */
+        GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
+      GST_AUDIO_CHANNEL_POSITION_LFE1},
+};
+
+const char *gst_opus_channel_names[] = {
+  "mono",
+  "front left",
+  "front right",
+  "rear center",
+  "rear left",
+  "rear right",
+  "lfe",
+  "front center",
+  "front left of center",
+  "front right of center",
+  "side left",
+  "side right",
+  "none"
+};
+
+void
+gst_opus_common_log_channel_mapping_table (GstElement * element,
+    GstDebugCategory * category, const char *msg, int n_channels,
+    const guint8 * table)
+{
+  int n;
+  GString *s;
+
+  if (gst_debug_category_get_threshold (category) < GST_LEVEL_INFO)
+    return;
+
+  s = g_string_new ("[ ");
+  for (n = 0; n < n_channels; ++n) {
+    g_string_append_printf (s, "%d ", table[n]);
+  }
+  g_string_append (s, "]");
+
+  GST_CAT_LEVEL_LOG (category, GST_LEVEL_INFO, element, "%s: %s", msg, s->str);
+  g_string_free (s, TRUE);
+}

ext/opus/gstopuscommon.h

+/* GStreamer Opus Encoder
+ * Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+
+#ifndef __GST_OPUS_COMMON_H__
+#define __GST_OPUS_COMMON_H__
+
+#include <gst/gst.h>
+#include <gst/audio/audio.h>
+
+G_BEGIN_DECLS
+
+extern const GstAudioChannelPosition gst_opus_channel_positions[][8];
+extern const char *gst_opus_channel_names[];
+extern void gst_opus_common_log_channel_mapping_table (GstElement *element,
+    GstDebugCategory * category, const char *msg,
+    int n_channels, const guint8 *table);
+
+G_END_DECLS
+
+#endif /* __GST_OPUS_COMMON_H__ */

ext/opus/gstopusdec.h

+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2008> Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ * Copyright (C) <2011-2012> Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __GST_OPUS_DEC_H__
+#define __GST_OPUS_DEC_H__
+
+#include <gst/gst.h>
+#include <gst/audio/gstaudiodecoder.h>
+#include <opus_multistream.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_OPUS_DEC \
+  (gst_opus_dec_get_type())
+#define GST_OPUS_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OPUS_DEC,GstOpusDec))
+#define GST_OPUS_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OPUS_DEC,GstOpusDecClass))
+#define GST_IS_OPUS_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OPUS_DEC))
+#define GST_IS_OPUS_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OPUS_DEC))
+
+typedef struct _GstOpusDec GstOpusDec;
+typedef struct _GstOpusDecClass GstOpusDecClass;
+
+struct _GstOpusDec {
+  GstAudioDecoder       element;
+
+  OpusMSDecoder        *state;
+
+  guint64               packetno;
+
+  GstBuffer            *streamheader;
+  GstBuffer            *vorbiscomment;
+
+  guint32 sample_rate;
+  guint8 n_channels;
+  guint16 pre_skip;
+  gint16 r128_gain;
+
+  GstAudioChannelPosition opus_pos[64];
+  GstAudioInfo info;
+
+  guint8 n_streams;
+  guint8 n_stereo_streams;
+  guint8 channel_mapping_family;
+  guint8 channel_mapping[256];
+
+  gboolean apply_gain;
+  double r128_gain_volume;
+
+  gboolean use_inband_fec;
+  GstBuffer *last_buffer;
+  gboolean primed;
+
+  guint64 leftover_plc_duration;
+};
+
+struct _GstOpusDecClass {
+  GstAudioDecoderClass parent_class;
+};
+
+GType gst_opus_dec_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_OPUS_DEC_H__ */

ext/opus/gstopusenc.h

+/* GStreamer Opus Encoder
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2008> Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ * Copyright (C) <2011-2012> Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+
+#ifndef __GST_OPUS_ENC_H__
+#define __GST_OPUS_ENC_H__
+
+
+#include <gst/gst.h>
+#include <gst/audio/gstaudioencoder.h>
+
+#include <opus_multistream.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_OPUS_ENC \
+  (gst_opus_enc_get_type())
+#define GST_OPUS_ENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OPUS_ENC,GstOpusEnc))
+#define GST_OPUS_ENC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OPUS_ENC,GstOpusEncClass))
+#define GST_IS_OPUS_ENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OPUS_ENC))
+#define GST_IS_OPUS_ENC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OPUS_ENC))
+
+#define MAX_FRAME_SIZE 2000*2
+#define MAX_FRAME_BYTES 2000
+
+typedef enum
+{
+  BITRATE_TYPE_CBR,
+  BITRATE_TYPE_VBR,
+  BITRATE_TYPE_CONSTRAINED_VBR,
+} GstOpusEncBitrateType;
+
+typedef struct _GstOpusEnc GstOpusEnc;
+typedef struct _GstOpusEncClass GstOpusEncClass;
+
+struct _GstOpusEnc {
+  GstAudioEncoder       element;
+
+  OpusMSEncoder        *state;
+
+  /* Locks those properties which may be changed at play time */
+  GMutex                property_lock;
+
+  /* properties */
+  gint                  audio_type;
+  gint                  bitrate;
+  gint                  bandwidth;
+  gint                  frame_size;
+  GstOpusEncBitrateType bitrate_type;
+  gint                  complexity;
+  gboolean              inband_fec;
+  gboolean              dtx;
+  gint                  packet_loss_percentage;
+  guint                 max_payload_size;
+
+  gint                  frame_samples;
+  gint                  n_channels;
+  gint                  sample_rate;
+
+  guint64               encoded_samples, consumed_samples;
+  guint16               lookahead, pending_lookahead;
+
+  guint8                channel_mapping_family;
+  guint8                encoding_channel_mapping[256];
+  guint8                decoding_channel_mapping[256];
+  guint8                n_stereo_streams;
+};
+
+struct _GstOpusEncClass {
+  GstAudioEncoderClass parent_class;
+
+  /* signals */
+  void (*frame_encoded) (GstElement *element);
+};
+
+GType gst_opus_enc_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_OPUS_ENC_H__ */

ext/opus/gstopusheader.c

+/* GStreamer Opus Encoder
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2008> Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ * Copyright (C) <2011> Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <gst/tag/tag.h>
+#include <gst/base/gstbytewriter.h>
+#include "gstopusheader.h"
+
+gboolean
+gst_opus_header_is_header (GstBuffer * buf, const char *magic, guint magic_size)
+{
+  return (gst_buffer_get_size (buf) >= magic_size
+      && !gst_buffer_memcmp (buf, 0, magic, magic_size));
+}
+
+gboolean
+gst_opus_header_is_id_header (GstBuffer * buf)
+{
+  gsize size = gst_buffer_get_size (buf);
+  guint8 *data = NULL;
+  guint8 version, channels, channel_mapping_family, n_streams, n_stereo_streams;
+  gboolean ret = FALSE;
+  GstMapInfo map;
+
+  if (size < 19)
+    goto beach;
+  if (!gst_opus_header_is_header (buf, "OpusHead", 8))
+    goto beach;
+
+  gst_buffer_map (buf, &map, GST_MAP_READ);
+  data = map.data;
+  size = map.size;
+
+  version = data[8];
+  if (version >= 0x0f)          /* major version >=0 is what we grok */
+    goto beach;
+
+  channels = data[9];
+
+  if (channels == 0)
+    goto beach;
+
+  channel_mapping_family = data[18];
+
+  if (channel_mapping_family == 0) {
+    if (channels > 2)
+      goto beach;
+  } else {
+    channels = data[9];
+    if (size < 21 + channels)
+      goto beach;
+    n_streams = data[19];
+    n_stereo_streams = data[20];
+    if (n_streams == 0)
+      goto beach;
+    if (n_stereo_streams > n_streams)
+      goto beach;
+    if (n_streams + n_stereo_streams > 255)
+      goto beach;
+  }
+  ret = TRUE;
+
+beach:
+  if (data)
+    gst_buffer_unmap (buf, &map);
+  return ret;
+}
+
+gboolean
+gst_opus_header_is_comment_header (GstBuffer * buf)
+{
+  return gst_opus_header_is_header (buf, "OpusTags", 8);
+}

ext/opus/gstopusheader.h

+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2008> Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ * Copyright (C) <2011-2012> Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __GST_OPUS_HEADER_H__
+#define __GST_OPUS_HEADER_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+extern gboolean gst_opus_header_is_header (GstBuffer * buf,
+    const char *magic, guint magic_size);
+extern gboolean gst_opus_header_is_id_header (GstBuffer * buf);
+extern gboolean gst_opus_header_is_comment_header (GstBuffer * buf);
+
+
+G_END_DECLS
+
+#endif /* __GST_OPUS_HEADER_H__ */

tests/check/elements/opus.c

+/* GStreamer
+ *
+ * unit test for opus
+ *
+ * Copyright (C) <2011> Vincent Penquerc'h <vincent.penquerch@collbaora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <unistd.h>
+
+#include <gst/check/gstcheck.h>
+
+#if G_BYTE_ORDER == G_BIG_ENDIAN
+#define AFORMAT "S16BE"
+#else
+#define AFORMAT "S16LE"
+#endif
+
+#define AUDIO_CAPS_STRING "audio/x-raw, " \
+                           "format = (string) " AFORMAT ", "\
+                           "layout = (string) interleaved, " \
+                           "rate = (int) 48000, " \
+                           "channels = (int) 1 "
+
+/* A lot of these taken from the vorbisdec test */
+
+/* For ease of programming we use globals to keep refs for our floating
+ * src and sink pads we create; otherwise we always have to do get_pad,
+ * get_peer, and then remove references in every test function */
+static GstPad *mydecsrcpad, *mydecsinkpad;
+static GstPad *myencsrcpad, *myencsinkpad;
+
+static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS_ANY);
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS_ANY);
+
+static GstElement *
+setup_opusdec (void)
+{
+  GstElement *opusdec;
+
+  GST_DEBUG ("setup_opusdec");
+  opusdec = gst_check_setup_element ("opusdec");
+  mydecsrcpad = gst_check_setup_src_pad (opusdec, &srctemplate);
+  mydecsinkpad = gst_check_setup_sink_pad (opusdec, &sinktemplate);
+  gst_pad_set_active (mydecsrcpad, TRUE);
+  gst_pad_set_active (mydecsinkpad, TRUE);
+
+  return opusdec;
+}
+
+static void
+cleanup_opusdec (GstElement * opusdec)
+{
+  GST_DEBUG ("cleanup_opusdec");
+  gst_element_set_state (opusdec, GST_STATE_NULL);
+
+  gst_pad_set_active (mydecsrcpad, FALSE);
+  gst_pad_set_active (mydecsinkpad, FALSE);
+  gst_check_teardown_src_pad (opusdec);
+  gst_check_teardown_sink_pad (opusdec);
+  gst_check_teardown_element (opusdec);
+}
+
+static GstElement *
+setup_opusenc (void)
+{
+  GstElement *opusenc;
+
+  GST_DEBUG ("setup_opusenc");
+  opusenc = gst_check_setup_element ("opusenc");
+  myencsrcpad = gst_check_setup_src_pad (opusenc, &srctemplate);
+  myencsinkpad = gst_check_setup_sink_pad (opusenc, &sinktemplate);
+  gst_pad_set_active (myencsrcpad, TRUE);
+  gst_pad_set_active (myencsinkpad, TRUE);
+
+  return opusenc;
+}
+
+static void
+cleanup_opusenc (GstElement * opusenc)
+{
+  GST_DEBUG ("cleanup_opusenc");
+  gst_element_set_state (opusenc, GST_STATE_NULL);
+
+  gst_pad_set_active (myencsrcpad, FALSE);
+  gst_pad_set_active (myencsinkpad, FALSE);
+  gst_check_teardown_src_pad (opusenc);
+  gst_check_teardown_sink_pad (opusenc);
+  gst_check_teardown_element (opusenc);
+}
+
+static void
+check_buffers (guint expected)
+{
+  GstBuffer *outbuffer;
+  guint i, num_buffers;
+
+  /* check buffers are the type we expect */
+  num_buffers = g_list_length (buffers);
+  fail_unless (num_buffers >= expected);
+  for (i = 0; i < num_buffers; ++i) {
+    outbuffer = GST_BUFFER (buffers->data);
+    fail_if (outbuffer == NULL);
+    fail_if (gst_buffer_get_size (outbuffer) == 0);
+
+    buffers = g_list_remove (buffers, outbuffer);
+
+    ASSERT_BUFFER_REFCOUNT (outbuffer, "outbuffer", 1);
+    gst_buffer_unref (outbuffer);
+    outbuffer = NULL;
+  }
+}
+
+GST_START_TEST (test_opus_encode_nothing)
+{
+  GstElement *opusenc;
+
+  opusenc = setup_opusenc ();
+  fail_unless (gst_element_set_state (opusenc,
+          GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+      "could not set to playing");
+
+  fail_unless (gst_pad_push_event (myencsrcpad, gst_event_new_eos ()) == TRUE);
+
+  fail_unless (gst_element_set_state (opusenc,