configure.ac: Add QuickTime Wrapper plug-in.

Original commit message from CVS:
2007-11-26  Julien Moutte  <julien@fluendo.com>

* configure.ac: Add QuickTime Wrapper plug-in.
* gst/speexresample/gstspeexresample.c:
(gst_speex_resample_push_drain), (gst_speex_resample_process): Fix
build on Mac OS X Leopard. Incorrect printf format arguments.
* sys/Makefile.am:
* sys/qtwrapper/Makefile.am:
* sys/qtwrapper/audiodecoders.c:
(qtwrapper_audio_decoder_base_init),
(qtwrapper_audio_decoder_class_init),
(qtwrapper_audio_decoder_init),
(clear_AudioStreamBasicDescription), (fill_indesc_mp3),
(fill_indesc_aac), (fill_indesc_samr), (fill_indesc_generic),
(make_samr_magic_cookie), (open_decoder),
(qtwrapper_audio_decoder_sink_setcaps), (process_buffer_cb),
(qtwrapper_audio_decoder_chain),
(qtwrapper_audio_decoder_sink_event),
(qtwrapper_audio_decoders_register):
* sys/qtwrapper/codecmapping.c: (audio_caps_from_string),
(fourcc_to_caps):
* sys/qtwrapper/codecmapping.h:
* sys/qtwrapper/imagedescription.c: (image_description_for_avc1),
(image_description_for_mp4v), (image_description_from_stsd_buffer),
(image_description_from_codec_data):
* sys/qtwrapper/imagedescription.h:
* sys/qtwrapper/qtutils.c: (get_name_info_from_component),
(get_output_info_from_component), (dump_avcc_atom),
(dump_image_description), (dump_codec_decompress_params),
(addSInt32ToDictionary), (dump_cvpixel_buffer),
(DestroyAudioBufferList), (AllocateAudioBufferList):
* sys/qtwrapper/qtutils.h:
* sys/qtwrapper/qtwrapper.c: (plugin_init):
* sys/qtwrapper/qtwrapper.h:
* sys/qtwrapper/videodecoders.c:
(qtwrapper_video_decoder_base_init),
(qtwrapper_video_decoder_class_init),
(qtwrapper_video_decoder_init), (qtwrapper_video_decoder_finalize),
(fill_image_description), (new_image_description), (close_decoder),
(open_decoder), (qtwrapper_video_decoder_sink_setcaps),
(decompressCb), (qtwrapper_video_decoder_chain),
(qtwrapper_video_decoder_sink_event),
(qtwrapper_video_decoders_register): Initial import of QuickTime
wrapper jointly developped by Songbird authors (Pioneers of the
Inevitable) and Fluendo.

1 files changed, 874 insertions, 0 deletions

diff --git a/sys/qtwrapper/videodecoders.c b/sys/qtwrapper/videodecoders.c
new file mode 100644
index 00000000..d0b54454
--- /dev/null
+++ b/sys/qtwrapper/videodecoders.c
@@ -0,0 +1,874 @@
+/*
+ * GStreamer QuickTime video decoder codecs wrapper
+ * Copyright <2006, 2007> Fluendo <gstreamer@fluendo.com>
+ * Copyright <2006, 2007> Pioneers of the Inevitable <songbird@songbirdnest.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
+ * which case the following provisions apply instead of the ones
+ * mentioned above:
+ *
+ * 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <QuickTime/Movies.h>
+
+#include "qtwrapper.h"
+#include "codecmapping.h"
+#include "qtutils.h"
+#include "imagedescription.h"
+
+#define QTWRAPPER_VDEC_PARAMS_QDATA g_quark_from_static_string("qtwrapper-vdec-params")
+
+static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-raw-yuv"));
+
+typedef struct _QTWrapperVideoDecoder QTWrapperVideoDecoder;
+typedef struct _QTWrapperVideoDecoderClass QTWrapperVideoDecoderClass;
+
+#define MAC_LOCK(qtwrapper) g_mutex_lock (qtwrapper->lock)
+#define MAC_UNLOCK(qtwrapper) g_mutex_unlock (qtwrapper->lock)
+
+struct _QTWrapperVideoDecoder
+{
+  GstElement parent;
+
+  GstPad *sinkpad;
+  GstPad *srcpad;
+
+  GMutex *lock;
+  ComponentInstance instance;
+  CodecInfo codecinfo;
+  ImageDescriptionHandle idesc;
+  CodecDecompressParams *dparams;
+  CodecCapabilities codeccaps;
+  guint64 frameNumber;
+  ICMDecompressionSessionRef decsession;
+  GstFlowReturn lastret;
+  guint64 outsize;
+  guint width, height;
+  GstClockTime last_ts;
+  GstClockTime last_duration;
+  GstBuffer *prevbuf;
+  gboolean flushing;
+  gboolean framebuffering;
+
+  /* width/height of output buffer */
+  Rect rect;
+};
+
+struct _QTWrapperVideoDecoderClass
+{
+  GstElementClass parent_class;
+
+  Component component;
+  guint32 componentType;
+  guint32 componentSubType;
+
+  GstPadTemplate *sinktempl;
+};
+
+typedef struct _QTWrapperVideoDecoderParams QTWrapperVideoDecoderParams;
+
+struct _QTWrapperVideoDecoderParams
+{
+  Component component;
+  GstCaps *sinkcaps;
+};
+
+static GstElementClass *parent_class = NULL;
+
+static gboolean
+qtwrapper_video_decoder_sink_setcaps (GstPad * pad, GstCaps * caps);
+static GstFlowReturn qtwrapper_video_decoder_chain (GstPad * pad,
+    GstBuffer * buf);
+static gboolean qtwrapper_video_decoder_sink_event (GstPad * pad,
+    GstEvent * event);
+
+static void qtwrapper_video_decoder_finalize (GObject * object);
+static void decompressCb (void *decompressionTrackingRefCon,
+    OSStatus result,
+    ICMDecompressionTrackingFlags decompressionTrackingFlags,
+    CVPixelBufferRef pixelBuffer,
+    TimeValue64 displayTime,
+    TimeValue64 displayDuration,
+    ICMValidTimeFlags validTimeFlags, void *reserved, void *sourceFrameRefCon);
+
+/*
+ * Class setup
+ */
+
+static void
+qtwrapper_video_decoder_base_init (QTWrapperVideoDecoderClass * klass)
+{
+  GstElementDetails details;
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+  gchar *name = NULL;
+  gchar *info = NULL;
+  ComponentDescription desc;
+  QTWrapperVideoDecoderParams *params;
+
+  params = (QTWrapperVideoDecoderParams *)
+      g_type_get_qdata (G_OBJECT_CLASS_TYPE (klass),
+      QTWRAPPER_VDEC_PARAMS_QDATA);
+  g_assert (params);
+
+  get_name_info_from_component (params->component, &desc, &name, &info);
+
+  /* Fill in details */
+  details.longname = g_strdup_printf ("QTWrapper Video Decoder : %s", name);
+  details.klass = "Codec/Decoder/Video";
+  details.description = info;
+  details.author = "Fluendo <gstreamer@fluendo.com>, "
+      "Pioneers of the Inevitable <songbird@songbirdnest.com>";
+  gst_element_class_set_details (element_class, &details);
+
+  g_free (details.longname);
+  g_free (name);
+  g_free (info);
+
+  klass->sinktempl = gst_pad_template_new ("sink", GST_PAD_SINK,
+      GST_PAD_ALWAYS, params->sinkcaps);
+
+  gst_element_class_add_pad_template (element_class, klass->sinktempl);
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_templ));
+
+  /* Store class-global values */
+  klass->component = params->component;
+  klass->componentType = desc.componentType;
+  klass->componentSubType = desc.componentSubType;
+}
+
+static void
+qtwrapper_video_decoder_class_init (QTWrapperVideoDecoderClass * klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gobject_class->finalize =
+      GST_DEBUG_FUNCPTR (qtwrapper_video_decoder_finalize);
+}
+
+static void
+qtwrapper_video_decoder_init (QTWrapperVideoDecoder * qtwrapper)
+{
+  QTWrapperVideoDecoderClass *oclass;
+  ImageSubCodecDecompressCapabilities capabs;
+
+  GST_LOG ("...");
+  oclass = (QTWrapperVideoDecoderClass *) (G_OBJECT_GET_CLASS (qtwrapper));
+
+  /* 1. Create a ocmponent instance */
+  if (!(qtwrapper->instance = OpenComponent (oclass->component))) {
+    GST_ERROR_OBJECT (qtwrapper, "Couldn't create a component instance !");
+    return;
+  }
+
+  /* 2. Initialize decoder */
+  memset (&capabs, 0, sizeof (ImageSubCodecDecompressCapabilities));
+  if (ImageCodecInitialize (qtwrapper->instance, &capabs) != noErr) {
+    GST_ERROR_OBJECT (qtwrapper, "Couldn't initialize the QT component !");
+    return;
+  }
+
+  /* 3. Get codec info */
+  memset (&qtwrapper->codecinfo, 0, sizeof (CodecInfo));
+  if (ImageCodecGetCodecInfo (qtwrapper->instance,
+          &qtwrapper->codecinfo) != noErr) {
+    GST_ERROR_OBJECT (qtwrapper, "Couldn't get Codec Information !");
+    return;
+  }
+
+  /* sink pad */
+  qtwrapper->sinkpad = gst_pad_new_from_template (oclass->sinktempl, "sink");
+  gst_pad_set_setcaps_function (qtwrapper->sinkpad,
+      GST_DEBUG_FUNCPTR (qtwrapper_video_decoder_sink_setcaps));
+  gst_pad_set_chain_function (qtwrapper->sinkpad,
+      GST_DEBUG_FUNCPTR (qtwrapper_video_decoder_chain));
+  gst_pad_set_event_function (qtwrapper->sinkpad,
+      GST_DEBUG_FUNCPTR (qtwrapper_video_decoder_sink_event));
+  gst_element_add_pad (GST_ELEMENT (qtwrapper), qtwrapper->sinkpad);
+
+  /* src pad */
+  qtwrapper->srcpad = gst_pad_new_from_static_template (&src_templ, "src");
+  gst_element_add_pad (GST_ELEMENT (qtwrapper), qtwrapper->srcpad);
+
+  qtwrapper->lock = g_mutex_new ();
+}
+
+static void
+qtwrapper_video_decoder_finalize (GObject * object)
+{
+  QTWrapperVideoDecoder *qtwrapper;
+
+  qtwrapper = (QTWrapperVideoDecoder *) object;
+
+  if (qtwrapper->lock)
+    g_mutex_free (qtwrapper->lock);
+
+  if (G_OBJECT_CLASS (parent_class)->finalize)
+    G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+/* fill_image_description
+ * Fills an ImageDescription with codec-specific values
+ *
+ * Doesn't fill in the idSize, width and height.
+ */
+
+static void
+fill_image_description (QTWrapperVideoDecoder * qtwrapper,
+    ImageDescription * desc)
+{
+  QTWrapperVideoDecoderClass *oclass;
+
+  oclass = (QTWrapperVideoDecoderClass *) (G_OBJECT_GET_CLASS (qtwrapper));
+
+  desc->cType = oclass->componentSubType;
+  desc->version = qtwrapper->codecinfo.version;
+  desc->revisionLevel = qtwrapper->codecinfo.revisionLevel;
+  desc->vendor = qtwrapper->codecinfo.vendor;
+  desc->temporalQuality = codecMaxQuality;
+  desc->spatialQuality = codecNormalQuality;
+  desc->hRes = Long2Fix (72);
+  desc->vRes = Long2Fix (72);
+  desc->frameCount = 1;
+  /* The following is a pure empiric calculation ... so there's are chances it
+   * might not work. To be fixed when we can figure out what the exact value should
+   * be. */
+  desc->depth = 24;
+  /* no color table */
+  desc->clutID = -1;
+}
+
+
+/* new_image_description
+ *
+ * Create an ImageDescription for the given 'codec_data' buffer.
+ */
+
+static ImageDescription *
+new_image_description (QTWrapperVideoDecoder * qtwrapper, GstBuffer * buf,
+    guint width, guint height)
+{
+  QTWrapperVideoDecoderClass *oclass;
+  ImageDescription *desc = NULL;
+
+  oclass = (QTWrapperVideoDecoderClass *) (G_OBJECT_GET_CLASS (qtwrapper));
+
+  if (buf) {
+    GST_LOG ("buf %p , size:%d", buf, GST_BUFFER_SIZE (buf));
+#if DEBUG_DUMP
+    gst_util_dump_mem (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
+#endif
+  }
+
+  if (!buf) {
+    /* standard case, no codec data */
+    desc = g_new0 (ImageDescription, 1);
+    desc->idSize = sizeof (ImageDescription);
+    fill_image_description (qtwrapper, desc);
+  } else {
+    if ((desc =
+            image_description_from_codec_data (buf, oclass->componentSubType)))
+      fill_image_description (qtwrapper, desc);
+    else
+      goto beach;
+  }
+
+  /* Fix up values */
+  desc->width = width;
+  desc->height = height;
+  desc->hRes = Long2Fix (72);
+  desc->vRes = Long2Fix (72);
+
+  /* if we have h264, we need frame buffering */
+  if ((oclass->componentSubType == QT_MAKE_FOURCC_LE ('a', 'v', 'c', '1')))
+    qtwrapper->framebuffering = TRUE;
+  else
+    qtwrapper->framebuffering = FALSE;
+
+beach:
+  return desc;
+}
+
+/* close_decoder
+ *
+ * Close and free decoder
+ */
+#if 0
+static void
+close_decoder (QTWrapperVideoDecoder * qtwrapper)
+{
+  if (qtwrapper->idesc) {
+    DisposeHandle ((Handle) qtwrapper->idesc);
+    qtwrapper->idesc = NULL;
+  }
+
+  if (qtwrapper->prevbuf) {
+    gst_buffer_unref (qtwrapper->prevbuf);
+    qtwrapper->prevbuf = NULL;
+  }
+
+  if (qtwrapper->dparams) {
+    g_free (qtwrapper->dparams);
+    qtwrapper->dparams = NULL;
+  }
+
+}
+#endif
+/* open_decoder
+ *
+ * Attempt to initialize the ImageDecompressorComponent with the given
+ * caps.
+ *
+ * Returns TRUE and fills *outcaps if the decoder was properly initialized
+ * Returns FALSE if something went wrong.
+ */
+
+static gboolean
+open_decoder (QTWrapperVideoDecoder * qtwrapper, GstCaps * caps,
+    GstCaps ** outcaps)
+{
+  ImageDescription *desc;
+  gint width, height;
+  GstStructure *s;
+  const GValue *par = NULL;
+  const GValue *rate = NULL;
+  const GValue *cdata = NULL;
+  OSErr oserr;
+  gboolean res = FALSE;
+  guint32 outformat;
+
+  ICMDecompressionSessionOptionsRef sessionoptions = NULL;
+  ICMDecompressionTrackingCallbackRecord cbrecord;
+  CFMutableDictionaryRef pixelBufferAttributes = NULL;
+
+
+  s = gst_caps_get_structure (caps, 0);
+
+  /* 1. Extract information from incoming caps */
+  if ((!gst_structure_get_int (s, "width", &width)) ||
+      (!gst_structure_get_int (s, "height", &height)) ||
+      (!(rate = gst_structure_get_value (s, "framerate"))))
+    goto beach;
+  par = gst_structure_get_value (s, "pixel-aspect-ratio");
+  cdata = gst_structure_get_value (s, "codec_data");
+
+  /* 2. Create ImageDescription */
+  if (cdata) {
+    GstBuffer *cdatabuf;
+
+    cdatabuf = gst_value_get_buffer (cdata);
+    desc = new_image_description (qtwrapper, cdatabuf, width, height);
+  } else {
+    desc = new_image_description (qtwrapper, NULL, width, height);
+  }
+
+#if DEBUG_DUMP
+  dump_image_description (desc);
+#endif
+
+  /* 3.a. Create a handle to receive the ImageDescription */
+  GST_LOG_OBJECT (qtwrapper,
+      "Creating a new ImageDescriptionHandle of %" G_GSIZE_FORMAT " bytes",
+      desc->idSize);
+  qtwrapper->idesc = (ImageDescriptionHandle) NewHandleClear (desc->idSize);
+  if (G_UNLIKELY (qtwrapper->idesc == NULL)) {
+    GST_WARNING_OBJECT (qtwrapper,
+        "Failed to create an ImageDescriptionHandle of size %" G_GSIZE_FORMAT,
+        desc->idSize);
+    g_free (desc);
+    goto beach;
+  }
+
+  /* 3.b. Copy the ImageDescription to the handle */
+  GST_LOG_OBJECT (qtwrapper,
+      "Copying %" G_GSIZE_FORMAT
+      " bytes from desc [%p] to *qtwrapper->video [%p]", desc->idSize, desc,
+      *qtwrapper->idesc);
+  memcpy (*qtwrapper->idesc, desc, desc->idSize);
+  g_free (desc);
+
+#if G_BYTE_ORDER == G_BIG_ENDIAN
+  outformat = kYUVSPixelFormat;
+#else
+  outformat = k2vuyPixelFormat;
+#endif
+
+  /* 4. Put output pixel info in dictionnnary */
+  pixelBufferAttributes =
+      CFDictionaryCreateMutable (NULL, 0, &kCFTypeDictionaryKeyCallBacks,
+      &kCFTypeDictionaryValueCallBacks);
+
+  addSInt32ToDictionary (pixelBufferAttributes, kCVPixelBufferWidthKey, width);
+  addSInt32ToDictionary (pixelBufferAttributes, kCVPixelBufferHeightKey,
+      height);
+  addSInt32ToDictionary (pixelBufferAttributes,
+      kCVPixelBufferPixelFormatTypeKey, outformat);
+
+  /* 5. fill in callback structure */
+
+  cbrecord.decompressionTrackingCallback = decompressCb;
+  cbrecord.decompressionTrackingRefCon = qtwrapper;
+
+  /* 6. create decompressionsession */
+  oserr = ICMDecompressionSessionCreate (NULL,
+      qtwrapper->idesc,
+      sessionoptions, pixelBufferAttributes, &cbrecord, &qtwrapper->decsession);
+
+  qtwrapper->outsize = width * height * 2;
+  qtwrapper->width = width;
+  qtwrapper->height = height;
+
+  if (oserr != noErr) {
+    GST_DEBUG_OBJECT (qtwrapper,
+        "Error when Calling ICMDecompressionSessionCreate : %d", oserr);
+    goto beach;
+  }
+#if G_BYTE_ORDER == G_BIG_ENDIAN
+  outformat = GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
+#else
+  outformat = GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y');
+#endif
+
+  /* 9. Create output caps */
+  *outcaps = gst_caps_new_simple ("video/x-raw-yuv",
+      "format", GST_TYPE_FOURCC, outformat,
+      "width", G_TYPE_INT, width,
+      "height", G_TYPE_INT, height,
+      "framerate", GST_TYPE_FRACTION,
+      gst_value_get_fraction_numerator (rate),
+      gst_value_get_fraction_denominator (rate), NULL);
+  if (par)
+    gst_structure_set_value (gst_caps_get_structure (*outcaps, 0),
+        "pixel-aspect-ratio", par);
+  res = TRUE;
+
+beach:
+  return res;
+}
+
+static gboolean
+qtwrapper_video_decoder_sink_setcaps (GstPad * pad, GstCaps * caps)
+{
+  QTWrapperVideoDecoder *qtwrapper;
+  gboolean ret = FALSE;
+  GstCaps *othercaps = NULL;
+
+  qtwrapper = (QTWrapperVideoDecoder *) gst_pad_get_parent (pad);
+
+  GST_LOG_OBJECT (qtwrapper, "caps:%" GST_PTR_FORMAT, caps);
+
+  /* Setup the decoder with the given input caps */
+  if (!(open_decoder (qtwrapper, caps, &othercaps))) {
+    goto beach;
+  }
+
+  ret = gst_pad_set_caps (qtwrapper->srcpad, othercaps);
+  if (!ret)
+    goto beach;
+
+beach:
+  if (othercaps)
+    gst_caps_unref (othercaps);
+  gst_object_unref (qtwrapper);
+  return ret;
+}
+
+static void
+decompressCb (void *decompressionTrackingRefCon,
+    OSStatus result,
+    ICMDecompressionTrackingFlags decompressionTrackingFlags,
+    CVPixelBufferRef pixelBuffer,
+    TimeValue64 displayTime,
+    TimeValue64 displayDuration,
+    ICMValidTimeFlags validTimeFlags, void *reserved, void *sourceFrameRefCon)
+{
+  QTWrapperVideoDecoder *qtwrapper;
+  GstBuffer *origbuf = (GstBuffer *) sourceFrameRefCon;
+
+  qtwrapper = (QTWrapperVideoDecoder *) decompressionTrackingRefCon;
+
+  GST_LOG_OBJECT (qtwrapper,
+      "result:%d, flags:0x%x, pixelBuffer:%p, displayTime:%lld, displayDuration:%lld",
+      (guint32) result, (guint32) decompressionTrackingFlags, pixelBuffer,
+      displayTime, displayDuration);
+
+  GST_LOG_OBJECT (qtwrapper,
+      "validTimeFlags:0x%x, reserved:%p, sourceFrameRefCon:%p",
+      (guint32) validTimeFlags, reserved, sourceFrameRefCon);
+
+  if (decompressionTrackingFlags & kICMDecompressionTracking_ReleaseSourceData) {
+    GST_LOG ("removing previous buffer : %p", origbuf);
+    gst_buffer_unref (origbuf);
+  }
+
+  if (decompressionTrackingFlags & kICMDecompressionTracking_EmittingFrame)
+    GST_LOG ("EMITTING FRAME");
+  if (decompressionTrackingFlags & kICMDecompressionTracking_FrameDecoded)
+    GST_LOG ("FRAME DECODED");
+  if (decompressionTrackingFlags & kICMDecompressionTracking_FrameDropped)
+    GST_LOG ("FRAME DROPPED");
+  if (decompressionTrackingFlags &
+      kICMDecompressionTracking_FrameNeedsRequeueing)
+    GST_LOG ("FRAME NEEDS REQUEUING");
+
+  if ((decompressionTrackingFlags & kICMDecompressionTracking_EmittingFrame)
+      && pixelBuffer) {
+    gpointer addr;
+    GstBuffer *outbuf;
+    gsize size;
+
+    size = CVPixelBufferGetDataSize (pixelBuffer);
+    GstClockTime outtime = gst_util_uint64_scale (displayTime, GST_SECOND, 600);
+
+    GST_LOG ("Got a buffer ready outtime : %" GST_TIME_FORMAT,
+        GST_TIME_ARGS (outtime));
+
+    if (qtwrapper->flushing) {
+      CVPixelBufferRelease (pixelBuffer);
+      goto beach;
+    }
+
+    dump_cvpixel_buffer (pixelBuffer);
+
+    CVPixelBufferRetain (pixelBuffer);
+    if (CVPixelBufferLockBaseAddress (pixelBuffer, 0))
+      GST_WARNING ("Couldn't lock base adress on pixel buffer !");
+    addr = CVPixelBufferGetBaseAddress (pixelBuffer);
+
+    /* allocate buffer */
+    qtwrapper->lastret =
+        gst_pad_alloc_buffer (qtwrapper->srcpad, GST_BUFFER_OFFSET_NONE,
+        qtwrapper->outsize, GST_PAD_CAPS (qtwrapper->srcpad), &outbuf);
+    if (G_UNLIKELY (qtwrapper->lastret != GST_FLOW_OK)) {
+      GST_LOG ("gst_pad_alloc_buffer() returned %s",
+          gst_flow_get_name (qtwrapper->lastret));
+      goto beach;
+    }
+
+    /* copy data */
+    GST_LOG ("copying data in buffer from %p to %p",
+        addr, GST_BUFFER_DATA (outbuf));
+    if (G_UNLIKELY ((qtwrapper->width * 2) !=
+            CVPixelBufferGetBytesPerRow (pixelBuffer))) {
+      guint i;
+      gulong stride, realpixels;
+
+      stride = CVPixelBufferGetBytesPerRow (pixelBuffer);
+      realpixels = qtwrapper->width * 2;
+
+      /* special copy for stride handling */
+      for (i = 0; i < qtwrapper->height; i++)
+        g_memmove (GST_BUFFER_DATA (outbuf) + realpixels * i,
+            addr + stride * i, realpixels);
+
+    } else
+      g_memmove (GST_BUFFER_DATA (outbuf), addr, qtwrapper->outsize);
+
+    /* Release CVPixelBuffer */
+    CVPixelBufferUnlockBaseAddress (pixelBuffer, 0);
+    CVPixelBufferRelease (pixelBuffer);
+
+    /* Set proper timestamp ! */
+    gst_buffer_set_caps (outbuf, GST_PAD_CAPS (qtwrapper->srcpad));
+    GST_BUFFER_TIMESTAMP (outbuf) = qtwrapper->last_ts;
+    GST_BUFFER_DURATION (outbuf) = qtwrapper->last_duration;
+    GST_BUFFER_SIZE (outbuf) = qtwrapper->outsize;
+
+    /* See if we push buffer downstream */
+    if (G_LIKELY (!qtwrapper->framebuffering)) {
+      GST_LOG ("No buffering needed, pushing buffer downstream");
+      MAC_UNLOCK (qtwrapper);
+      qtwrapper->lastret = gst_pad_push (qtwrapper->srcpad, outbuf);
+      MAC_LOCK (qtwrapper);
+    } else {
+      /* Check if we push the current buffer or the stored buffer */
+      if (!qtwrapper->prevbuf) {
+        GST_LOG ("Storing buffer");
+        qtwrapper->prevbuf = outbuf;
+        qtwrapper->lastret = GST_FLOW_OK;
+      } else if (GST_BUFFER_TIMESTAMP (qtwrapper->prevbuf) >
+          GST_BUFFER_TIMESTAMP (outbuf)) {
+        GST_LOG ("Newly decoded buffer is earliest, pushing that one !");
+        MAC_UNLOCK (qtwrapper);
+        qtwrapper->lastret = gst_pad_push (qtwrapper->srcpad, outbuf);
+        MAC_LOCK (qtwrapper);
+      } else {
+        GstBuffer *tmp;
+
+        tmp = qtwrapper->prevbuf;
+        qtwrapper->prevbuf = outbuf;
+        GST_LOG ("Stored buffer is earliest, pushing that one !");
+        MAC_UNLOCK (qtwrapper);
+        qtwrapper->lastret = gst_pad_push (qtwrapper->srcpad, tmp);
+        MAC_LOCK (qtwrapper);
+      }
+    }
+  } else {
+    qtwrapper->lastret = GST_FLOW_OK;
+  }
+
+beach:
+  return;
+}
+
+/* _chain
+ *
+ * Here we feed the data to the decoder and ask to decode frames.
+ *
+ * Known issues/questions are:
+ *  * How can we be guaranteed that one frame in automatically gives one output
+ *    frame ?
+ *  * PTS/DTS timestamp issues. With mpeg-derivate formats, the incoming order is
+ *    different from the output order.
+ */
+
+static GstFlowReturn
+qtwrapper_video_decoder_chain (GstPad * pad, GstBuffer * buf)
+{
+  QTWrapperVideoDecoder *qtwrapper;
+  GstFlowReturn ret = GST_FLOW_OK;
+  ICMFrameTimeRecord frameTime = { {0} };
+  OSErr oserr;
+  guint64 intime;
+
+  qtwrapper = (QTWrapperVideoDecoder *) gst_pad_get_parent (pad);
+
+  intime = gst_util_uint64_scale (GST_BUFFER_TIMESTAMP (buf), 600, GST_SECOND);
+
+  GST_DEBUG_OBJECT (qtwrapper,
+      "buffer:%p timestamp:%" GST_TIME_FORMAT " intime:%llu Size:%d", buf,
+      GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), intime,
+      GST_BUFFER_SIZE (buf));
+
+  frameTime.recordSize = sizeof (ICMFrameTimeRecord);
+/*   *(TimeValue64 *)&frameTime.value = intime; */
+  frameTime.value.lo = intime;
+  frameTime.value.hi = 0;
+  frameTime.base = 0;
+  frameTime.scale = 600;
+  frameTime.rate = fixed1;
+  frameTime.duration = 1;
+  frameTime.flags = icmFrameTimeDecodeImmediately;
+/*   frameTime.flags = icmFrameTimeIsNonScheduledDisplayTime; */
+  frameTime.frameNumber = ++qtwrapper->frameNumber;
+
+  MAC_LOCK (qtwrapper);
+
+  qtwrapper->last_ts = GST_BUFFER_TIMESTAMP (buf);
+  qtwrapper->last_duration = GST_BUFFER_DURATION (buf);
+
+  oserr = ICMDecompressionSessionDecodeFrame (qtwrapper->decsession,
+      GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), NULL, &frameTime, buf);
+  MAC_UNLOCK (qtwrapper);
+
+  if (oserr != noErr) {
+    GST_WARNING_OBJECT (qtwrapper, "Error when Calling DecodeFrame() : %d",
+        oserr);
+    ret = GST_FLOW_ERROR;
+    goto beach;
+  }
+
+beach:
+  gst_object_unref (qtwrapper);
+  return qtwrapper->lastret;
+}
+
+static gboolean
+qtwrapper_video_decoder_sink_event (GstPad * pad, GstEvent * event)
+{
+  gboolean res;
+  QTWrapperVideoDecoder *qtwrapper;
+
+  qtwrapper = (QTWrapperVideoDecoder *) gst_pad_get_parent (pad);
+
+  GST_LOG_OBJECT (pad, "event : %s", GST_EVENT_TYPE_NAME (event));
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_FLUSH_START:
+      MAC_LOCK (qtwrapper);
+      qtwrapper->flushing = TRUE;
+      if (qtwrapper->prevbuf) {
+        GST_LOG ("About to unref buffer %p", qtwrapper->prevbuf);
+        gst_buffer_unref (qtwrapper->prevbuf);
+        qtwrapper->prevbuf = NULL;
+      }
+      ICMDecompressionSessionFlush (qtwrapper->decsession);
+      MAC_UNLOCK (qtwrapper);
+      break;
+    case GST_EVENT_FLUSH_STOP:
+      MAC_LOCK (qtwrapper);
+      qtwrapper->flushing = FALSE;
+      qtwrapper->prevbuf = NULL;
+      MAC_UNLOCK (qtwrapper);
+      break;
+    default:
+      break;
+  }
+
+  res = gst_pad_push_event (qtwrapper->srcpad, event);
+
+  gst_object_unref (qtwrapper);
+  return res;
+}
+
+/* _register
+ *
+ * Scan through all available Image Decompressor components to find the ones we
+ * can handle and wrap in this plugin.
+ */
+
+gboolean
+qtwrapper_video_decoders_register (GstPlugin * plugin)
+{
+  gboolean res = TRUE;
+  OSErr result;
+  Component componentID = NULL;
+  ComponentDescription desc = {
+    'imdc', 0, 0, 0, 0
+  };
+  GTypeInfo typeinfo = {
+    sizeof (QTWrapperVideoDecoderClass),
+    (GBaseInitFunc) qtwrapper_video_decoder_base_init,
+    NULL,
+    (GClassInitFunc) qtwrapper_video_decoder_class_init,
+    NULL,
+    NULL,
+    sizeof (QTWrapperVideoDecoder),
+    0,
+    (GInstanceInitFunc) qtwrapper_video_decoder_init,
+  };
+
+  /* Initialize quicktime environment */
+  result = EnterMovies ();
+  if (result != noErr) {
+    GST_ERROR ("Error initializing QuickTime environment");
+    res = FALSE;
+    goto beach;
+  }
+
+  /* Find all ImageDecoders ! */
+  GST_DEBUG ("There are %ld decompressors available", CountComponents (&desc));
+
+  /* loop over ImageDecoders */
+  do {
+    componentID = FindNextComponent (componentID, &desc);
+
+    GST_LOG ("componentID : %p", componentID);
+
+    if (componentID) {
+      ComponentDescription thisdesc;
+      gchar *name = NULL, *info = NULL;
+      GstCaps *caps = NULL;
+      gchar *type_name = NULL;
+      GType type;
+      QTWrapperVideoDecoderParams *params = NULL;
+
+      if (!(get_name_info_from_component (componentID, &thisdesc, &name,
+                  &info)))
+        goto next;
+
+      if (!get_output_info_from_component (componentID)) {
+        GST_WARNING ("Couldn't get output info from component");
+        goto next;
+      }
+
+      GST_LOG (" name:%s", name);
+      GST_LOG (" info:%s", info);
+
+      GST_LOG (" type:%" GST_FOURCC_FORMAT,
+          QT_FOURCC_ARGS (thisdesc.componentType));
+      GST_LOG (" subtype:%" GST_FOURCC_FORMAT,
+          QT_FOURCC_ARGS (thisdesc.componentSubType));
+      GST_LOG (" manufacturer:%" GST_FOURCC_FORMAT,
+          QT_FOURCC_ARGS (thisdesc.componentManufacturer));
+
+      if (!(caps = fourcc_to_caps (thisdesc.componentSubType))) {
+        GST_LOG
+            ("We can't find caps for this component, switching to the next one !");
+        goto next;
+      }
+
+      type_name = g_strdup_printf ("qtwrappervideodec_%" GST_FOURCC_FORMAT,
+          QT_FOURCC_ARGS (thisdesc.componentSubType));
+      g_strdelimit (type_name, " ", '_');
+
+      if (g_type_from_name (type_name)) {
+        GST_WARNING ("We already have a registered plugin for %s", type_name);
+        goto next;
+      }
+
+      params = g_new0 (QTWrapperVideoDecoderParams, 1);
+      params->component = componentID;
+      params->sinkcaps = gst_caps_ref (caps);
+
+      type = g_type_register_static (GST_TYPE_ELEMENT, type_name, &typeinfo, 0);
+      /* Store params in type qdata */
+      g_type_set_qdata (type, QTWRAPPER_VDEC_PARAMS_QDATA, (gpointer) params);
+
+      /* register type */
+      if (!gst_element_register (plugin, type_name, GST_RANK_MARGINAL, type)) {
+        g_warning ("Failed to register %s", type_name);;
+        g_type_set_qdata (type, QTWRAPPER_VDEC_PARAMS_QDATA, NULL);
+        g_free (params);
+        res = FALSE;
+        goto next;
+      }
+
+    next:
+      if (name)
+        g_free (name);
+      if (info)
+        g_free (info);
+      if (type_name)
+        g_free (type_name);
+      if (caps)
+        gst_caps_unref (caps);
+    }
+
+  } while (componentID && res);
+
+beach:
+  return res;
+}