gstreamer/gst/qtdemux/qtdemux.c

/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 * Copyright (C) <2003> David A. Schleef <ds@schleef.org>
 *
 * 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 "qtdemux.h"

#include <stdlib.h>
#include <string.h>
#include <zlib.h>

GST_DEBUG_CATEGORY_EXTERN (qtdemux_debug);
#define GST_CAT_DEFAULT qtdemux_debug

/* temporary hack */
#define gst_util_dump_mem(a,b)  /* */

#define QTDEMUX_GUINT32_GET(a)	(GST_READ_UINT32_BE(a))
#define QTDEMUX_GUINT24_GET(a)	(GST_READ_UINT32_BE(a) >> 8)
#define QTDEMUX_GUINT16_GET(a)	(GST_READ_UINT16_BE(a))
#define QTDEMUX_GUINT8_GET(a) (*(guint8 *)(a))
#define QTDEMUX_FP32_GET(a)	((GST_READ_UINT32_BE(a))/65536.0)
#define QTDEMUX_FP16_GET(a)	((GST_READ_UINT16_BE(a))/256.0)
#define QTDEMUX_FOURCC_GET(a)	(GST_READ_UINT32_LE(a))

#define QTDEMUX_GUINT64_GET(a) ((((guint64)QTDEMUX_GUINT32_GET(a))<<32)|QTDEMUX_GUINT32_GET(((void *)a)+4))

typedef struct _QtNode QtNode;
typedef struct _QtNodeType QtNodeType;
typedef struct _QtDemuxSample QtDemuxSample;

//typedef struct _QtDemuxStream QtDemuxStream;

struct _QtNode
{
  guint32 type;
  gpointer data;
  int len;
};

struct _QtNodeType
{
  guint32 fourcc;
  char *name;
  int flags;
  void (*dump) (GstQTDemux * qtdemux, void *buffer, int depth);
};

struct _QtDemuxSample
{
  int sample_index;
  int chunk;
  int size;
  guint32 offset;
  guint64 timestamp;
  guint64 duration;
};

struct _QtDemuxStream
{
  guint32 subtype;
  GstCaps *caps;
  GstPad *pad;
  int n_samples;
  QtDemuxSample *samples;
  int timescale;

  int sample_index;

  int width;
  int height;
  float fps;

  double rate;
  int n_channels;
  guint bytes_per_frame;
  guint compression;
  guint samples_per_packet;
};

enum QtDemuxState
{
  QTDEMUX_STATE_NULL,
  QTDEMUX_STATE_HEADER,
  QTDEMUX_STATE_HEADER_SEEKING,
  QTDEMUX_STATE_SEEKING,
  QTDEMUX_STATE_MOVIE,
  QTDEMUX_STATE_SEEKING_EOS,
  QTDEMUX_STATE_EOS
};

static GNode *qtdemux_tree_get_child_by_type (GNode * node, guint32 fourcc);
static GNode *qtdemux_tree_get_sibling_by_type (GNode * node, guint32 fourcc);

static GstElementDetails gst_qtdemux_details = {
  "QuickTime Demuxer",
  "Codec/Demuxer",
  "Demultiplex a QuickTime file into audio and video streams",
  "David Schleef <ds@schleef.org>"
};

enum
{
  LAST_SIGNAL
};

enum
{
  ARG_0
};

static GstStaticPadTemplate gst_qtdemux_sink_template =
    GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("video/quicktime; audio/x-m4a; application/x-3gp")
    );

static GstStaticPadTemplate gst_qtdemux_videosrc_template =
GST_STATIC_PAD_TEMPLATE ("audio_%02d",
    GST_PAD_SRC,
    GST_PAD_SOMETIMES,
    GST_STATIC_CAPS_ANY);

static GstStaticPadTemplate gst_qtdemux_audiosrc_template =
GST_STATIC_PAD_TEMPLATE ("video_%02d",
    GST_PAD_SRC,
    GST_PAD_SOMETIMES,
    GST_STATIC_CAPS_ANY);

static GstElementClass *parent_class = NULL;

static void gst_qtdemux_class_init (GstQTDemuxClass * klass);
static void gst_qtdemux_base_init (GstQTDemuxClass * klass);
static void gst_qtdemux_init (GstQTDemux * quicktime_demux);
static GstElementStateReturn gst_qtdemux_change_state (GstElement * element);
static void gst_qtdemux_loop_header (GstElement * element);
static gboolean gst_qtdemux_handle_sink_event (GstQTDemux * qtdemux);

static void qtdemux_parse_moov (GstQTDemux * qtdemux, void *buffer, int length);
static void qtdemux_parse (GstQTDemux * qtdemux, GNode * node, void *buffer,
    int length);
static QtNodeType *qtdemux_type_get (guint32 fourcc);
static void qtdemux_node_dump (GstQTDemux * qtdemux, GNode * node);
static void qtdemux_parse_tree (GstQTDemux * qtdemux);
static void qtdemux_parse_udta (GstQTDemux * qtdemux, GNode * udta);
static void qtdemux_tag_add_str (GstQTDemux * qtdemux, const char *tag,
    GNode * node);
static void qtdemux_tag_add_num (GstQTDemux * qtdemux, const char *tag1,
    const char *tag2, GNode * node);
static void qtdemux_tag_add_gnre (GstQTDemux * qtdemux, const char *tag,
    GNode * node);

static void gst_qtdemux_handle_esds (GstQTDemux * qtdemux,
    QtDemuxStream * stream, GNode * esds);
static GstCaps *qtdemux_video_caps (GstQTDemux * qtdemux, guint32 fourcc,
    const guint8 * stsd_data);
static GstCaps *qtdemux_audio_caps (GstQTDemux * qtdemux, guint32 fourcc,
    const guint8 * data, int len);

static GType
gst_qtdemux_get_type (void)
{
  static GType qtdemux_type = 0;

  if (!qtdemux_type) {
    static const GTypeInfo qtdemux_info = {
      sizeof (GstQTDemuxClass),
      (GBaseInitFunc) gst_qtdemux_base_init, NULL,
      (GClassInitFunc) gst_qtdemux_class_init,
      NULL, NULL, sizeof (GstQTDemux), 0,
      (GInstanceInitFunc) gst_qtdemux_init,
    };

    qtdemux_type =
        g_type_register_static (GST_TYPE_ELEMENT, "GstQTDemux", &qtdemux_info,
        0);
  }
  return qtdemux_type;
}

static void
gst_qtdemux_base_init (GstQTDemuxClass * klass)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&gst_qtdemux_sink_template));
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&gst_qtdemux_videosrc_template));
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&gst_qtdemux_audiosrc_template));
  gst_element_class_set_details (element_class, &gst_qtdemux_details);

}

static void
gst_qtdemux_class_init (GstQTDemuxClass * klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;

  gobject_class = (GObjectClass *) klass;
  gstelement_class = (GstElementClass *) klass;

  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);

  gstelement_class->change_state = gst_qtdemux_change_state;
}

static void
gst_qtdemux_init (GstQTDemux * qtdemux)
{
  qtdemux->sinkpad =
      gst_pad_new_from_template (gst_static_pad_template_get
      (&gst_qtdemux_sink_template), "sink");
  gst_element_set_loop_function (GST_ELEMENT (qtdemux),
      gst_qtdemux_loop_header);
  gst_element_add_pad (GST_ELEMENT (qtdemux), qtdemux->sinkpad);

  qtdemux->last_ts = GST_CLOCK_TIME_NONE;
  qtdemux->need_discont = FALSE;
  qtdemux->need_flush = FALSE;
}

static const GstFormat *
gst_qtdemux_get_src_formats (GstPad * pad)
{
  static const GstFormat src_a_formats[] = {
    GST_FORMAT_TIME,
    GST_FORMAT_BYTES,
    GST_FORMAT_DEFAULT,
    0
  };
  static const GstFormat src_v_formats[] = {
    GST_FORMAT_TIME,
    GST_FORMAT_DEFAULT,
    0
  };
  QtDemuxStream *stream = gst_pad_get_element_private (pad);

  return (stream->subtype == GST_MAKE_FOURCC ('v', 'i', 'd', 'e')) ?
      src_v_formats : src_a_formats;
}

static gboolean
gst_qtdemux_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
    GstFormat * dest_format, gint64 * dest_value)
{
  gboolean res = TRUE;
  QtDemuxStream *stream = gst_pad_get_element_private (pad);

  if (stream->subtype == GST_MAKE_FOURCC ('v', 'i', 'd', 'e') &&
      (src_format == GST_FORMAT_BYTES || *dest_format == GST_FORMAT_BYTES))
    return FALSE;

  switch (src_format) {
    case GST_FORMAT_TIME:
      switch (*dest_format) {
        case GST_FORMAT_BYTES:
          *dest_value = src_value * 1;  /* FIXME */
          break;
        case GST_FORMAT_DEFAULT:
          *dest_value = src_value * 1;  /* FIXME */
          break;
        default:
          res = FALSE;
          break;
      }
      break;
    case GST_FORMAT_BYTES:
      switch (*dest_format) {
        case GST_FORMAT_TIME:
          *dest_value = src_value * 1;  /* FIXME */
          break;
        default:
          res = FALSE;
          break;
      }
      break;
    case GST_FORMAT_DEFAULT:
      switch (*dest_format) {
        case GST_FORMAT_TIME:
          *dest_value = src_value * 1;  /* FIXME */
          break;
        default:
          res = FALSE;
          break;
      }
      break;
    default:
      res = FALSE;
  }

  return res;
}

static const GstQueryType *
gst_qtdemux_get_src_query_types (GstPad * pad)
{
  static const GstQueryType src_types[] = {
    GST_QUERY_TOTAL,
    GST_QUERY_POSITION,
    0
  };

  return src_types;
}

static const GstEventMask *
gst_qtdemux_get_event_mask (GstPad * pad)
{
  static const GstEventMask masks[] = {
    {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_KEY_UNIT},
    {0,}
  };

  return masks;
}

static gboolean
gst_qtdemux_handle_src_query (GstPad * pad, GstQueryType type,
    GstFormat * format, gint64 * value)
{
  gboolean res = FALSE;
  GstQTDemux *qtdemux = GST_QTDEMUX (gst_pad_get_parent (pad));

  //QtDemuxStream *stream = gst_pad_get_element_private(pad);

  switch (type) {
    case GST_QUERY_TOTAL:
      switch (*format) {
        case GST_FORMAT_TIME:
          if (qtdemux->duration != 0 && qtdemux->timescale != 0) {
            *value =
                (guint64) qtdemux->duration * GST_SECOND / qtdemux->timescale;
            res = TRUE;
          }
          break;
        case GST_FORMAT_BYTES:
          *value = 0;           /* FIXME */
          break;
        case GST_FORMAT_DEFAULT:
          *value = 0;           /* FIXME */
          break;
        default:
          res = FALSE;
          break;
      }
      break;
    case GST_QUERY_POSITION:
      switch (*format) {
        case GST_FORMAT_TIME:
          if (GST_CLOCK_TIME_IS_VALID (qtdemux->last_ts)) {
            *value = qtdemux->last_ts;
            res = TRUE;
          }
          break;
        case GST_FORMAT_BYTES:
          *value = 0;           /* FIXME */
          break;
        case GST_FORMAT_DEFAULT:
          *value = 0;           /* FIXME */
          break;
        default:
          res = FALSE;
          break;
      }
      break;
    default:
      res = FALSE;
      break;
  }

  return res;
}

static gboolean
gst_qtdemux_handle_src_event (GstPad * pad, GstEvent * event)
{
  gboolean res = TRUE;
  GstQTDemux *qtdemux = GST_QTDEMUX (gst_pad_get_parent (pad));

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_SEEK:
      GST_DEBUG ("seek format %d", GST_EVENT_SEEK_FORMAT (event));

      switch (GST_EVENT_SEEK_FORMAT (event)) {
        case GST_FORMAT_BYTES:
        case GST_FORMAT_DEFAULT:
          res = FALSE;
          break;
        case GST_FORMAT_TIME:
        {
          gint64 desired_offset = GST_EVENT_SEEK_OFFSET (event);
          gint i = 0, n;
          QtDemuxStream *stream = gst_pad_get_element_private (pad);

          GST_DEBUG ("seeking to %" G_GINT64_FORMAT, desired_offset);

          if (!stream->n_samples) {
            res = FALSE;
            break;
          }

          /* resync to new time */
          for (n = 0; n < qtdemux->n_streams; n++) {
            QtDemuxStream *str = qtdemux->streams[n];

            for (i = 0; i < str->n_samples; i++) {
              if (str->samples[i].timestamp > desired_offset)
                break;
            }
            str->sample_index = i;
          }
          qtdemux->need_discont = TRUE;
          if (GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH)
            qtdemux->need_flush = TRUE;
          break;
        }
        default:
          res = FALSE;
          break;
      }
    default:
      res = FALSE;
      break;
  }

  gst_event_unref (event);

  return res;
}



GST_DEBUG_CATEGORY (qtdemux_debug);

static gboolean
plugin_init (GstPlugin * plugin)
{
  GST_DEBUG_CATEGORY_INIT (qtdemux_debug, "qtdemux", 0, "qtdemux plugin");

  if (!gst_library_load ("gstbytestream"))
    return FALSE;

  if (!gst_library_load ("gstgetbits"))
    return FALSE;

  return gst_element_register (plugin, "qtdemux",
      GST_RANK_PRIMARY, GST_TYPE_QTDEMUX);
}

GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
    GST_VERSION_MINOR,
    "qtdemux",
    "Quicktime stream demuxer",
    plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN);

static gboolean
gst_qtdemux_handle_sink_event (GstQTDemux * qtdemux)
{
  gboolean res = TRUE;
  guint32 remaining;
  GstEvent *event;
  GstEventType type;

  gst_bytestream_get_status (qtdemux->bs, &remaining, &event);

  type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
  GST_DEBUG ("qtdemux: event %p %d", event, type);

  switch (type) {
    case GST_EVENT_EOS:
      gst_bytestream_flush (qtdemux->bs, remaining);
      gst_pad_event_default (qtdemux->sinkpad, event);
      return FALSE;
    case GST_EVENT_FLUSH:
      break;
    case GST_EVENT_DISCONTINUOUS:
      GST_DEBUG ("discontinuous event");
      //gst_bytestream_flush_fast(qtdemux->bs, remaining);
      break;
    default:
      res = FALSE;
      g_warning ("unhandled event %d", type);
      break;
  }

  gst_event_unref (event);
  return res;
}

static GstElementStateReturn
gst_qtdemux_change_state (GstElement * element)
{
  GstQTDemux *qtdemux = GST_QTDEMUX (element);

  switch (GST_STATE_TRANSITION (element)) {
    case GST_STATE_NULL_TO_READY:
      break;
    case GST_STATE_READY_TO_PAUSED:
      qtdemux->bs = gst_bytestream_new (qtdemux->sinkpad);
      qtdemux->state = QTDEMUX_STATE_HEADER;
      break;
    case GST_STATE_PAUSED_TO_PLAYING:
      break;
    case GST_STATE_PLAYING_TO_PAUSED:
      break;
    case GST_STATE_PAUSED_TO_READY:
      qtdemux->last_ts = GST_CLOCK_TIME_NONE;
      qtdemux->need_discont = FALSE;
      qtdemux->need_flush = FALSE;
      gst_bytestream_destroy (qtdemux->bs);
      break;
    case GST_STATE_READY_TO_NULL:
      break;
    default:
      break;
  }

  return GST_ELEMENT_CLASS (parent_class)->change_state (element);
}

static void
gst_qtdemux_loop_header (GstElement * element)
{
  GstQTDemux *qtdemux = GST_QTDEMUX (element);
  guint8 *data;
  guint32 length;
  guint32 fourcc;
  GstBuffer *buf;
  int offset;
  int cur_offset;
  int size;
  int ret;

  /* FIXME _tell gets the offset wrong */
  //cur_offset = gst_bytestream_tell(qtdemux->bs);

  cur_offset = qtdemux->offset;
  GST_DEBUG ("loop at position %d", cur_offset);

  switch (qtdemux->state) {
    case QTDEMUX_STATE_HEADER:
    {
      do {
        /* FIXME: we peek for 16 bytes, but what if the atom is smaller ? */
        ret = gst_bytestream_peek_bytes (qtdemux->bs, &data, 16);
        if (ret < 16) {
          if (!gst_qtdemux_handle_sink_event (qtdemux)) {
            return;
          }
        } else {
          break;
        }
      } while (1);

      length = GST_READ_UINT32_BE (data);
      GST_DEBUG ("length %08x", length);
      fourcc = GST_READ_UINT32_LE (data + 4);
      GST_DEBUG ("atom type " GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc));

      if (length == 0) {
        length = gst_bytestream_length (qtdemux->bs) - cur_offset;
      }
      if (length == 1) {
        /* this means we have an extended size, which is the 64 bit value of
         * the next 8 bytes */
        guint32 length1, length2;

        length1 = GST_READ_UINT32_BE (data + 8);
        GST_DEBUG ("length1 %08x", length1);
        length2 = GST_READ_UINT32_BE (data + 12);
        GST_DEBUG ("length2 %08x", length2);

        /* FIXME: I guess someone didn't want to make 64 bit size work :) */
        length = length2;
      }

      switch (fourcc) {
        case GST_MAKE_FOURCC ('m', 'd', 'a', 't'):
        case GST_MAKE_FOURCC ('f', 'r', 'e', 'e'):
        case GST_MAKE_FOURCC ('w', 'i', 'd', 'e'):
        case GST_MAKE_FOURCC ('P', 'I', 'C', 'T'):
        case GST_MAKE_FOURCC ('p', 'n', 'o', 't'):
          break;
        case GST_MAKE_FOURCC ('m', 'o', 'o', 'v'):
        {
          GstBuffer *moov;

          do {
            /* read in the complete data from the moov atom */
            ret = gst_bytestream_read (qtdemux->bs, &moov, length);
            if (ret < length) {
              GST_DEBUG ("read failed (%d < %d)", ret, length);
              if (!gst_qtdemux_handle_sink_event (qtdemux)) {
                return;
              }
            } else {
              break;
            }
          } while (1);

          qtdemux_parse_moov (qtdemux, GST_BUFFER_DATA (moov), length);
          if (1) {
            qtdemux_node_dump (qtdemux, qtdemux->moov_node);
          }
          qtdemux_parse_tree (qtdemux);
          qtdemux->state = QTDEMUX_STATE_MOVIE;
          break;
        }
        default:
        {
          GST_LOG ("unknown %08x '" GST_FOURCC_FORMAT "' at %d",
              fourcc, GST_FOURCC_ARGS (fourcc), cur_offset);
          break;
        }
      }
      ret = gst_bytestream_seek (qtdemux->bs, cur_offset + length,
          GST_SEEK_METHOD_SET);
      if (!ret) {
        g_warning ("seek failed");
      }
      qtdemux->offset = cur_offset + length;
      GST_DEBUG ("seek returned %d", ret);
      break;
    }
    case QTDEMUX_STATE_SEEKING_EOS:
    {
      guint8 *data;

      do {
        ret = gst_bytestream_peek_bytes (qtdemux->bs, &data, 1);
        if (ret < 1) {
          if (!gst_qtdemux_handle_sink_event (qtdemux)) {
            return;
          }
        } else {
          break;
        }
      } while (TRUE);
      gst_element_set_eos (element);

      qtdemux->state = QTDEMUX_STATE_EOS;
      return;
    }
    case QTDEMUX_STATE_EOS:
      g_warning ("spinning in EOS\n");
      return;
    case QTDEMUX_STATE_MOVIE:
    {
      QtDemuxStream *stream;
      guint64 min_time;
      int index = -1;
      int i;

      min_time = G_MAXUINT64;
      for (i = 0; i < qtdemux->n_streams; i++) {
        stream = qtdemux->streams[i];

        if (stream->sample_index < stream->n_samples &&
            stream->samples[stream->sample_index].timestamp < min_time) {
          min_time = stream->samples[stream->sample_index].timestamp;
          index = i;
        }
      }

      if (index == -1) {
        for (i = 0; i < qtdemux->n_streams; i++) {
          gst_pad_push (qtdemux->streams[i]->pad,
              GST_DATA (gst_event_new (GST_EVENT_EOS)));
        }
        ret = gst_bytestream_seek (qtdemux->bs, 0, GST_SEEK_METHOD_END);
        if (!ret) {
          g_warning ("seek failed");
        }
        GST_DEBUG ("seek returned %d", ret);

        qtdemux->state = QTDEMUX_STATE_SEEKING_EOS;
        return;
      }

      stream = qtdemux->streams[index];

      offset = stream->samples[stream->sample_index].offset;
      size = stream->samples[stream->sample_index].size;

      GST_INFO
          ("pushing from stream %d, sample_index=%d offset=%d size=%d timestamp=%lld",
          index, stream->sample_index, offset, size,
          stream->samples[stream->sample_index].timestamp);

      /* don't believe bytestream */
      //cur_offset = gst_bytestream_tell (qtdemux->bs);

      if (offset != cur_offset) {
        GST_DEBUG ("seeking to offset %d (currently at %d)", offset,
            cur_offset);
        ret = gst_bytestream_seek (qtdemux->bs, offset, GST_SEEK_METHOD_SET);
        if (!ret) {
          g_warning ("seek failed");
        }
        qtdemux->offset = offset;
        GST_DEBUG ("seek returned %d", ret);
        return;
      }

      GST_DEBUG ("reading %d bytes", size);
      buf = NULL;
      do {
        ret = gst_bytestream_read (qtdemux->bs, &buf, size);
        if (ret < size) {
          GST_DEBUG ("read failed (%d < %d)", ret, size);
          if (!gst_qtdemux_handle_sink_event (qtdemux)) {
            return;
          }
        } else {
          break;
        }
      } while (TRUE);

      if (buf) {
        /* hum... FIXME changing framerate breaks horribly, better set
         * an average framerate, or get rid of the framerate property. */
        if (stream->subtype == GST_MAKE_FOURCC ('v', 'i', 'd', 'e')) {
          //float fps =
          //   1. * GST_SECOND / stream->samples[stream->sample_index].duration;
          /*
             if (fps != stream->fps) {
             gst_caps_set_simple (stream->caps, "framerate", G_TYPE_DOUBLE, fps,
             NULL);
             stream->fps = fps;
             gst_pad_set_explicit_caps (stream->pad, stream->caps);
             }
           */
        }

        GST_BUFFER_TIMESTAMP (buf) =
            stream->samples[stream->sample_index].timestamp;
        qtdemux->last_ts = GST_BUFFER_TIMESTAMP (buf);
        GST_BUFFER_DURATION (buf) =
            stream->samples[stream->sample_index].duration;
        if (qtdemux->need_flush) {
          gst_pad_event_default (qtdemux->sinkpad,
              gst_event_new (GST_EVENT_FLUSH));
          qtdemux->need_flush = FALSE;
        }
        if (qtdemux->need_discont) {
          GstEvent *event = gst_event_new_discontinuous (FALSE,
              GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buf),
              GST_FORMAT_UNDEFINED);
          gint n;

          qtdemux->need_discont = FALSE;
          for (n = 0; n < qtdemux->n_streams; n++) {
            gst_event_ref (event);
            gst_pad_push (qtdemux->streams[n]->pad, GST_DATA (event));
          }
          gst_event_unref (event);
        }
        GST_DEBUG ("Pushing buf with time=%" GST_TIME_FORMAT "\n",
            GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
        gst_pad_push (stream->pad, GST_DATA (buf));

        GST_INFO ("pushing buffer on %" GST_PTR_FORMAT, stream->pad);
      }
      stream->sample_index++;
      break;
    }
    default:
      /* unreached */
      g_assert (0);
  }
}

void
gst_qtdemux_add_stream (GstQTDemux * qtdemux, QtDemuxStream * stream)
{
  if (stream->subtype == GST_MAKE_FOURCC ('v', 'i', 'd', 'e')) {
    gchar *name = g_strdup_printf ("video_%02d", qtdemux->n_video_streams);

    stream->pad =
        gst_pad_new_from_template (gst_static_pad_template_get
        (&gst_qtdemux_videosrc_template), name);
    g_free (name);
    stream->fps = 1. * GST_SECOND / stream->samples[0].duration;
    if (stream->caps) {
      gst_caps_set_simple (stream->caps,
          "width", G_TYPE_INT, stream->width,
          "height", G_TYPE_INT, stream->height,
          "framerate", G_TYPE_DOUBLE, stream->fps, NULL);
    }
    qtdemux->n_video_streams++;
  } else {
    gchar *name = g_strdup_printf ("audio_%02d", qtdemux->n_audio_streams);

    stream->pad =
        gst_pad_new_from_template (gst_static_pad_template_get
        (&gst_qtdemux_audiosrc_template), name);
    g_free (name);
    if (stream->caps) {
      gst_caps_set_simple (stream->caps,
          "rate", G_TYPE_INT, (int) stream->rate,
          "channels", G_TYPE_INT, stream->n_channels, NULL);
    }
    qtdemux->n_audio_streams++;
  }

  gst_pad_use_explicit_caps (stream->pad);

  GST_PAD_ELEMENT_PRIVATE (stream->pad) = stream;
  qtdemux->streams[qtdemux->n_streams] = stream;
  qtdemux->n_streams++;
  GST_DEBUG ("n_streams is now %d", qtdemux->n_streams);

  gst_pad_set_event_mask_function (stream->pad, gst_qtdemux_get_event_mask);
  gst_pad_set_event_function (stream->pad, gst_qtdemux_handle_src_event);
  gst_pad_set_query_type_function (stream->pad,
      gst_qtdemux_get_src_query_types);
  gst_pad_set_query_function (stream->pad, gst_qtdemux_handle_src_query);
  gst_pad_set_formats_function (stream->pad, gst_qtdemux_get_src_formats);
  gst_pad_set_convert_function (stream->pad, gst_qtdemux_src_convert);

  GST_DEBUG ("setting caps %s\n", gst_caps_to_string (stream->caps));
  gst_pad_set_explicit_caps (stream->pad, stream->caps);

  GST_DEBUG ("adding pad %s %p to qtdemux %p",
      gst_pad_get_name (stream->pad), stream->pad, qtdemux);
  gst_element_add_pad (GST_ELEMENT (qtdemux), stream->pad);
}


#define QT_CONTAINER 1

#define FOURCC_moov	GST_MAKE_FOURCC('m','o','o','v')
#define FOURCC_mvhd	GST_MAKE_FOURCC('m','v','h','d')
#define FOURCC_clip	GST_MAKE_FOURCC('c','l','i','p')
#define FOURCC_trak	GST_MAKE_FOURCC('t','r','a','k')
#define FOURCC_udta	GST_MAKE_FOURCC('u','d','t','a')
#define FOURCC_ctab	GST_MAKE_FOURCC('c','t','a','b')
#define FOURCC_tkhd	GST_MAKE_FOURCC('t','k','h','d')
#define FOURCC_crgn	GST_MAKE_FOURCC('c','r','g','n')
#define FOURCC_matt	GST_MAKE_FOURCC('m','a','t','t')
#define FOURCC_kmat	GST_MAKE_FOURCC('k','m','a','t')
#define FOURCC_edts	GST_MAKE_FOURCC('e','d','t','s')
#define FOURCC_elst	GST_MAKE_FOURCC('e','l','s','t')
#define FOURCC_load	GST_MAKE_FOURCC('l','o','a','d')
#define FOURCC_tref	GST_MAKE_FOURCC('t','r','e','f')
#define FOURCC_imap	GST_MAKE_FOURCC('i','m','a','p')
#define FOURCC___in	GST_MAKE_FOURCC(' ',' ','i','n')
#define FOURCC___ty	GST_MAKE_FOURCC(' ',' ','t','y')
#define FOURCC_mdia	GST_MAKE_FOURCC('m','d','i','a')
#define FOURCC_mdhd	GST_MAKE_FOURCC('m','d','h','d')
#define FOURCC_hdlr	GST_MAKE_FOURCC('h','d','l','r')
#define FOURCC_minf	GST_MAKE_FOURCC('m','i','n','f')
#define FOURCC_vmhd	GST_MAKE_FOURCC('v','m','h','d')
#define FOURCC_smhd	GST_MAKE_FOURCC('s','m','h','d')
#define FOURCC_gmhd	GST_MAKE_FOURCC('g','m','h','d')
#define FOURCC_gmin	GST_MAKE_FOURCC('g','m','i','n')
#define FOURCC_dinf	GST_MAKE_FOURCC('d','i','n','f')
#define FOURCC_dref	GST_MAKE_FOURCC('d','r','e','f')
#define FOURCC_stbl	GST_MAKE_FOURCC('s','t','b','l')
#define FOURCC_stsd	GST_MAKE_FOURCC('s','t','s','d')
#define FOURCC_stts	GST_MAKE_FOURCC('s','t','t','s')
#define FOURCC_stss	GST_MAKE_FOURCC('s','t','s','s')
#define FOURCC_stsc	GST_MAKE_FOURCC('s','t','s','c')
#define FOURCC_stsz	GST_MAKE_FOURCC('s','t','s','z')
#define FOURCC_stco	GST_MAKE_FOURCC('s','t','c','o')
#define FOURCC_vide	GST_MAKE_FOURCC('v','i','d','e')
#define FOURCC_soun	GST_MAKE_FOURCC('s','o','u','n')
#define FOURCC_co64	GST_MAKE_FOURCC('c','o','6','4')
#define FOURCC_cmov	GST_MAKE_FOURCC('c','m','o','v')
#define FOURCC_dcom	GST_MAKE_FOURCC('d','c','o','m')
#define FOURCC_cmvd	GST_MAKE_FOURCC('c','m','v','d')
#define FOURCC_hint	GST_MAKE_FOURCC('h','i','n','t')
#define FOURCC_mp4a	GST_MAKE_FOURCC('m','p','4','a')
#define FOURCC_mp4v	GST_MAKE_FOURCC('m','p','4','v')
#define FOURCC_wave	GST_MAKE_FOURCC('w','a','v','e')
#define FOURCC_appl	GST_MAKE_FOURCC('a','p','p','l')
#define FOURCC_esds	GST_MAKE_FOURCC('e','s','d','s')
#define FOURCC_hnti	GST_MAKE_FOURCC('h','n','t','i')
#define FOURCC_rtp_	GST_MAKE_FOURCC('r','t','p',' ')
#define FOURCC_sdp_	GST_MAKE_FOURCC('s','d','p',' ')
#define FOURCC_meta	GST_MAKE_FOURCC('m','e','t','a')
#define FOURCC_ilst	GST_MAKE_FOURCC('i','l','s','t')
#define FOURCC__nam	GST_MAKE_FOURCC(0xa9,'n','a','m')
#define FOURCC__ART	GST_MAKE_FOURCC(0xa9,'A','R','T')
#define FOURCC__wrt	GST_MAKE_FOURCC(0xa9,'w','r','t')
#define FOURCC__grp	GST_MAKE_FOURCC(0xa9,'g','r','p')
#define FOURCC__alb	GST_MAKE_FOURCC(0xa9,'a','l','b')
#define FOURCC_gnre	GST_MAKE_FOURCC('g','n','r','e')
#define FOURCC_disc	GST_MAKE_FOURCC('d','i','s','c')
#define FOURCC_trkn	GST_MAKE_FOURCC('t','r','k','n')
#define FOURCC_cpil	GST_MAKE_FOURCC('c','p','i','l')
#define FOURCC_tmpo	GST_MAKE_FOURCC('t','m','p','o')
#define FOURCC__too	GST_MAKE_FOURCC(0xa9,'t','o','o')
#define FOURCC_____	GST_MAKE_FOURCC('-','-','-','-')
#define FOURCC_free	GST_MAKE_FOURCC('f','r','e','e')
#define FOURCC_data	GST_MAKE_FOURCC('d','a','t','a')
#define FOURCC_SVQ3	GST_MAKE_FOURCC('S','V','Q','3')


static void qtdemux_dump_mvhd (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_tkhd (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_elst (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_mdhd (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_hdlr (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_vmhd (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_dref (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_stsd (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_stts (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_stss (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_stsc (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_stsz (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_stco (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_co64 (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_dcom (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_cmvd (GstQTDemux * qtdemux, void *buffer, int depth);
static void qtdemux_dump_unknown (GstQTDemux * qtdemux, void *buffer,
    int depth);

QtNodeType qt_node_types[] = {
  {FOURCC_moov, "movie", QT_CONTAINER,},
  {FOURCC_mvhd, "movie header", 0,
      qtdemux_dump_mvhd},
  {FOURCC_clip, "clipping", QT_CONTAINER,},
  {FOURCC_trak, "track", QT_CONTAINER,},
  {FOURCC_udta, "user data", QT_CONTAINER,},    /* special container */
  {FOURCC_ctab, "color table", 0,},
  {FOURCC_tkhd, "track header", 0,
      qtdemux_dump_tkhd},
  {FOURCC_crgn, "clipping region", 0,},
  {FOURCC_matt, "track matte", QT_CONTAINER,},
  {FOURCC_kmat, "compressed matte", 0,},
  {FOURCC_edts, "edit", QT_CONTAINER,},
  {FOURCC_elst, "edit list", 0,
      qtdemux_dump_elst},
  {FOURCC_load, "track load settings", 0,},
  {FOURCC_tref, "track reference", QT_CONTAINER,},
  {FOURCC_imap, "track input map", QT_CONTAINER,},
  {FOURCC___in, "track input", 0,},     /* special container */
  {FOURCC___ty, "input type", 0,},
  {FOURCC_mdia, "media", QT_CONTAINER},
  {FOURCC_mdhd, "media header", 0,
      qtdemux_dump_mdhd},
  {FOURCC_hdlr, "handler reference", 0,
      qtdemux_dump_hdlr},
  {FOURCC_minf, "media information", QT_CONTAINER},
  {FOURCC_vmhd, "video media information", 0,
      qtdemux_dump_vmhd},
  {FOURCC_smhd, "sound media information", 0},
  {FOURCC_gmhd, "base media information header", 0},
  {FOURCC_gmin, "base media info", 0},
  {FOURCC_dinf, "data information", QT_CONTAINER},
  {FOURCC_dref, "data reference", 0,
      qtdemux_dump_dref},
  {FOURCC_stbl, "sample table", QT_CONTAINER},
  {FOURCC_stsd, "sample description", 0,
      qtdemux_dump_stsd},
  {FOURCC_stts, "time-to-sample", 0,
      qtdemux_dump_stts},
  {FOURCC_stss, "sync sample", 0,
      qtdemux_dump_stss},
  {FOURCC_stsc, "sample-to-chunk", 0,
      qtdemux_dump_stsc},
  {FOURCC_stsz, "sample size", 0,
      qtdemux_dump_stsz},
  {FOURCC_stco, "chunk offset", 0,
      qtdemux_dump_stco},
  {FOURCC_co64, "64-bit chunk offset", 0,
      qtdemux_dump_co64},
  {FOURCC_vide, "video media", 0},
  {FOURCC_cmov, "compressed movie", QT_CONTAINER},
  {FOURCC_dcom, "compressed data", 0, qtdemux_dump_dcom},
  {FOURCC_cmvd, "compressed movie data", 0, qtdemux_dump_cmvd},
  {FOURCC_hint, "hint", 0,},
  {FOURCC_mp4a, "mp4a", 0,},
  {FOURCC_mp4v, "mp4v", 0,},
  {FOURCC_wave, "wave", QT_CONTAINER},
  {FOURCC_appl, "appl", QT_CONTAINER},
  {FOURCC_esds, "esds", 0},
  {FOURCC_hnti, "hnti", QT_CONTAINER},
  {FOURCC_rtp_, "rtp ", 0, qtdemux_dump_unknown},
  {FOURCC_sdp_, "sdp ", 0, qtdemux_dump_unknown},
  {FOURCC_meta, "meta", 0, qtdemux_dump_unknown},
  {FOURCC_ilst, "ilst", QT_CONTAINER,},
  {FOURCC__nam, "Name", QT_CONTAINER,},
  {FOURCC__ART, "Artist", QT_CONTAINER,},
  {FOURCC__wrt, "Writer", QT_CONTAINER,},
  {FOURCC__grp, "Group", QT_CONTAINER,},
  {FOURCC__alb, "Album", QT_CONTAINER,},
  {FOURCC_gnre, "Genre", QT_CONTAINER,},
  {FOURCC_trkn, "Track Number", QT_CONTAINER,},
  {FOURCC_disc, "Disc Number", QT_CONTAINER,},
  {FOURCC_cpil, "cpil", QT_CONTAINER,},
  {FOURCC_tmpo, "Tempo", QT_CONTAINER,},
  {FOURCC__too, "too", QT_CONTAINER,},
  {FOURCC_____, "----", QT_CONTAINER,},
  {FOURCC_data, "data", 0, qtdemux_dump_unknown},
  {FOURCC_free, "free", 0,},
  {FOURCC_SVQ3, "SVQ3", 0,},
  {0, "unknown", 0},
};
static int n_qt_node_types = sizeof (qt_node_types) / sizeof (qt_node_types[0]);


static void *
qtdemux_zalloc (void *opaque, unsigned int items, unsigned int size)
{
  return g_malloc (items * size);
}

static void
qtdemux_zfree (void *opaque, void *addr)
{
  g_free (addr);
}

static void *
qtdemux_inflate (void *z_buffer, int z_length, int length)
{
  void *buffer;
  z_stream *z;
  int ret;

  z = g_new0 (z_stream, 1);
  z->zalloc = qtdemux_zalloc;
  z->zfree = qtdemux_zfree;
  z->opaque = NULL;

  z->next_in = z_buffer;
  z->avail_in = z_length;

  buffer = g_malloc (length);
  ret = inflateInit (z);
  while (z->avail_in > 0) {
    if (z->avail_out == 0) {
      length += 1024;
      buffer = realloc (buffer, length);
      z->next_out = buffer + z->total_out;
      z->avail_out = 1024;
    }
    ret = inflate (z, Z_SYNC_FLUSH);
    if (ret != Z_OK)
      break;
  }
  if (ret != Z_STREAM_END) {
    g_warning ("inflate() returned %d\n", ret);
  }

  g_free (z);
  return buffer;
}

static void
qtdemux_parse_moov (GstQTDemux * qtdemux, void *buffer, int length)
{
  GNode *cmov;

  qtdemux->moov_node = g_node_new (buffer);

  GST_DEBUG_OBJECT (qtdemux, "parsing 'moov' atom");
  qtdemux_parse (qtdemux, qtdemux->moov_node, buffer, length);

  cmov = qtdemux_tree_get_child_by_type (qtdemux->moov_node, FOURCC_cmov);
  if (cmov) {
    GNode *dcom;
    GNode *cmvd;

    dcom = qtdemux_tree_get_child_by_type (cmov, FOURCC_dcom);
    cmvd = qtdemux_tree_get_child_by_type (cmov, FOURCC_cmvd);

    if (QTDEMUX_FOURCC_GET (dcom->data + 8) == GST_MAKE_FOURCC ('z', 'l', 'i',
            'b')) {
      int uncompressed_length;
      int compressed_length;
      void *buf;

      uncompressed_length = QTDEMUX_GUINT32_GET (cmvd->data + 8);
      compressed_length = QTDEMUX_GUINT32_GET (cmvd->data + 4) - 12;
      GST_LOG ("length = %d", uncompressed_length);

      buf = qtdemux_inflate (cmvd->data + 12, compressed_length,
          uncompressed_length);

      qtdemux->moov_node_compressed = qtdemux->moov_node;
      qtdemux->moov_node = g_node_new (buf);

      qtdemux_parse (qtdemux, qtdemux->moov_node, buf, uncompressed_length);
    } else {
      GST_LOG ("unknown header compression type");
    }
  }
}

static void
qtdemux_parse (GstQTDemux * qtdemux, GNode * node, void *buffer, int length)
{
  guint32 fourcc;
  guint32 node_length;
  QtNodeType *type;
  void *end;

  GST_LOG ("qtdemux_parse buffer %p length %d", buffer, length);

  node_length = QTDEMUX_GUINT32_GET (buffer);
  fourcc = QTDEMUX_FOURCC_GET (buffer + 4);

  type = qtdemux_type_get (fourcc);

  if (fourcc == 0 || node_length == 8)
    return;

  GST_LOG ("parsing '" GST_FOURCC_FORMAT "', length=%d",
      GST_FOURCC_ARGS (fourcc), node_length);

  if (type->flags & QT_CONTAINER) {
    void *buf;
    guint32 len;

    buf = buffer + 8;
    end = buffer + length;
    while (buf < end) {
      GNode *child;

      if (buf + 8 >= end) {
        /* FIXME: get annoyed */
        GST_LOG ("buffer overrun");
      }
      len = QTDEMUX_GUINT32_GET (buf);
      if (len < 8) {
        GST_ERROR ("atom length too short (%d < 8)", len);
        break;
      }
      if (len > (end - buf)) {
        GST_ERROR ("atom length too long (%d > %d)", len, end - buf);
        break;
      }

      child = g_node_new (buf);
      g_node_append (node, child);
      qtdemux_parse (qtdemux, child, buf, len);

      buf += len;
    }
  } else {
    if (fourcc == FOURCC_stsd) {
      void *buf;
      guint32 len;

      GST_DEBUG_OBJECT (qtdemux,
          "parsing stsd (sample table, sample description) atom");
      buf = buffer + 16;
      end = buffer + length;
      while (buf < end) {
        GNode *child;

        if (buf + 8 >= end) {
          /* FIXME: get annoyed */
          GST_LOG ("buffer overrun");
        }
        len = QTDEMUX_GUINT32_GET (buf);
        if (len < 8) {
          GST_ERROR ("length too short (%d < 8)");
          break;
        }
        if (len > (end - buf)) {
          GST_ERROR ("length too long (%d > %d)", len, end - buf);
          break;
        }

        child = g_node_new (buf);
        g_node_append (node, child);
        qtdemux_parse (qtdemux, child, buf, len);

        buf += len;
      }
    } else if (fourcc == FOURCC_mp4a) {
      void *buf;
      guint32 len;
      guint32 version;

      version = QTDEMUX_GUINT32_GET (buffer + 16);
      if (version == 0x00010000) {
        buf = buffer + 0x34;
        end = buffer + length;
        while (buf < end) {
          GNode *child;

          if (buf + 8 >= end) {
            /* FIXME: get annoyed */
            GST_LOG ("buffer overrun");
          }
          len = QTDEMUX_GUINT32_GET (buf);
          if (len < 8) {
            GST_ERROR ("length too short (%d < 8)");
            break;
          }
          if (len > (end - buf)) {
            GST_ERROR ("length too long (%d > %d)", len, end - buf);
            break;
          }

          child = g_node_new (buf);
          g_node_append (node, child);
          qtdemux_parse (qtdemux, child, buf, len);

          buf += len;
        }
      }
    } else if (fourcc == FOURCC_mp4v) {
      void *buf;
      guint32 len;
      guint32 version;
      int tlen;

      GST_DEBUG ("parsing in mp4v\n");
      version = QTDEMUX_GUINT32_GET (buffer + 16);
      GST_DEBUG ("version %08x\n", version);
      if (1 || version == 0x00000000) {

        buf = buffer + 0x32;
        end = buffer + length;

        /* FIXME Quicktime uses PASCAL string while
         * the iso format uses C strings. Check the file
         * type before attempting to parse the string here. */
        tlen = QTDEMUX_GUINT8_GET (buf);
        GST_DEBUG ("tlen = %d\n", tlen);
        buf++;
        GST_DEBUG ("string = %.*s\n", tlen, (char *) buf);
        /* the string has a reserved space of 32 bytes so skip
         * the remaining 31 */
        buf += 31;
        buf += 4;               /* and 4 bytes reserved */

        gst_util_dump_mem (buf, end - buf);
        while (buf < end) {
          GNode *child;

          if (buf + 8 >= end) {
            /* FIXME: get annoyed */
            GST_LOG ("buffer overrun");
          }
          len = QTDEMUX_GUINT32_GET (buf);
          if (len == 0)
            break;
          if (len < 8) {
            GST_ERROR ("length too short (%d < 8)");
            break;
          }
          if (len > (end - buf)) {
            GST_ERROR ("length too long (%d > %d)", len, end - buf);
            break;
          }

          child = g_node_new (buf);
          g_node_append (node, child);
          qtdemux_parse (qtdemux, child, buf, len);

          buf += len;
        }
      }
    } else if (fourcc == FOURCC_meta) {
      void *buf;
      guint32 len;

      buf = buffer + 12;
      end = buffer + length;
      while (buf < end) {
        GNode *child;

        if (buf + 8 >= end) {
          /* FIXME: get annoyed */
          GST_LOG ("buffer overrun");
        }
        len = QTDEMUX_GUINT32_GET (buf);
        if (len < 8) {
          GST_ERROR ("length too short (%d < 8)");
          break;
        }
        if (len > (end - buf)) {
          GST_ERROR ("length too long (%d > %d)", len, end - buf);
          break;
        }

        child = g_node_new (buf);
        g_node_append (node, child);
        qtdemux_parse (qtdemux, child, buf, len);

        buf += len;
      }
    } else if (fourcc == FOURCC_SVQ3) {
      void *buf;
      guint32 len;
      guint32 version;
      int tlen;

      GST_LOG ("parsing in SVQ3\n");
      buf = buffer + 12;
      end = buffer + length;
      version = QTDEMUX_GUINT32_GET (buffer + 16);
      GST_DEBUG ("version %08x\n", version);
      if (1 || version == 0x00000000) {

        buf = buffer + 0x32;
        end = buffer + length;

        tlen = QTDEMUX_GUINT8_GET (buf);
        GST_DEBUG ("tlen = %d\n", tlen);
        buf++;
        GST_DEBUG ("string = %.*s\n", tlen, (char *) buf);
        buf += tlen;
        buf += 23;

        gst_util_dump_mem (buf, end - buf);
        while (buf < end) {
          GNode *child;

          if (buf + 8 >= end) {
            /* FIXME: get annoyed */
            GST_LOG ("buffer overrun");
          }
          len = QTDEMUX_GUINT32_GET (buf);
          if (len == 0)
            break;
          if (len < 8) {
            GST_ERROR ("length too short (%d < 8)");
            break;
          }
          if (len > (end - buf)) {
            GST_ERROR ("length too long (%d > %d)", len, end - buf);
            break;
          }

          child = g_node_new (buf);
          g_node_append (node, child);
          qtdemux_parse (qtdemux, child, buf, len);

          buf += len;
        }
      }
    }
#if 0
    if (fourcc == FOURCC_cmvd) {
      int uncompressed_length;
      void *buf;

      uncompressed_length = QTDEMUX_GUINT32_GET (buffer + 8);
      GST_LOG ("length = %d", uncompressed_length);

      buf =
          qtdemux_inflate (buffer + 12, node_length - 12, uncompressed_length);

      end = buf + uncompressed_length;
      while (buf < end) {
        GNode *child;
        guint32 len;

        if (buf + 8 >= end) {
          /* FIXME: get annoyed */
          GST_LOG ("buffer overrun");
        }
        len = QTDEMUX_GUINT32_GET (buf);

        child = g_node_new (buf);
        g_node_append (node, child);
        qtdemux_parse (qtdemux, child, buf, len);

        buf += len;
      }
    }
#endif
  }
}

static QtNodeType *
qtdemux_type_get (guint32 fourcc)
{
  int i;

  for (i = 0; i < n_qt_node_types; i++) {
    if (qt_node_types[i].fourcc == fourcc)
      return qt_node_types + i;
  }

  GST_WARNING ("unknown QuickTime node type " GST_FOURCC_FORMAT,
      GST_FOURCC_ARGS (fourcc));
  return qt_node_types + n_qt_node_types - 1;
}

static gboolean
qtdemux_node_dump_foreach (GNode * node, gpointer data)
{
  void *buffer = node->data;
  guint32 node_length;
  guint32 fourcc;
  QtNodeType *type;
  int depth;

  node_length = GST_READ_UINT32_BE (buffer);
  fourcc = GST_READ_UINT32_LE (buffer + 4);

  type = qtdemux_type_get (fourcc);

  depth = (g_node_depth (node) - 1) * 2;
  GST_LOG ("%*s'" GST_FOURCC_FORMAT "', [%d], %s",
      depth, "", GST_FOURCC_ARGS (fourcc), node_length, type->name);

  if (type->dump)
    type->dump (data, buffer, depth);

  return FALSE;
}

static void
qtdemux_node_dump (GstQTDemux * qtdemux, GNode * node)
{
  g_node_traverse (qtdemux->moov_node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
      qtdemux_node_dump_foreach, qtdemux);
}

static void
qtdemux_dump_mvhd (GstQTDemux * qtdemux, void *buffer, int depth)
{
  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  creation time: %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  GST_LOG ("%*s  modify time:   %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 16));
  GST_LOG ("%*s  time scale:    1/%u sec", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 20));
  GST_LOG ("%*s  duration:      %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 24));
  qtdemux->duration = QTDEMUX_GUINT32_GET (buffer + 24);
  qtdemux->timescale = QTDEMUX_GUINT32_GET (buffer + 20);
  GST_LOG ("%*s  pref. rate:    %g", depth, "", QTDEMUX_FP32_GET (buffer + 28));
  GST_LOG ("%*s  pref. volume:  %g", depth, "", QTDEMUX_FP16_GET (buffer + 32));
  GST_LOG ("%*s  preview time:  %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 80));
  GST_LOG ("%*s  preview dur.:  %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 84));
  GST_LOG ("%*s  poster time:   %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 88));
  GST_LOG ("%*s  select time:   %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 92));
  GST_LOG ("%*s  select dur.:   %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 96));
  GST_LOG ("%*s  current time:  %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 100));
  GST_LOG ("%*s  next track ID: %d", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 104));
}

static void
qtdemux_dump_tkhd (GstQTDemux * qtdemux, void *buffer, int depth)
{
  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  creation time: %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  GST_LOG ("%*s  modify time:   %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 16));
  GST_LOG ("%*s  track ID:      %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 20));
  GST_LOG ("%*s  duration:      %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 28));
  GST_LOG ("%*s  layer:         %u", depth, "",
      QTDEMUX_GUINT16_GET (buffer + 36));
  GST_LOG ("%*s  alt group:     %u", depth, "",
      QTDEMUX_GUINT16_GET (buffer + 38));
  GST_LOG ("%*s  volume:        %g", depth, "", QTDEMUX_FP16_GET (buffer + 44));
  GST_LOG ("%*s  track width:   %g", depth, "", QTDEMUX_FP32_GET (buffer + 84));
  GST_LOG ("%*s  track height:  %g", depth, "", QTDEMUX_FP32_GET (buffer + 88));

}

static void
qtdemux_dump_elst (GstQTDemux * qtdemux, void *buffer, int depth)
{
  int i;
  int n;

  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  n entries:     %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  n = QTDEMUX_GUINT32_GET (buffer + 12);
  for (i = 0; i < n; i++) {
    GST_LOG ("%*s    track dur:     %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + 16 + i * 12));
    GST_LOG ("%*s    media time:    %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + 20 + i * 12));
    GST_LOG ("%*s    media rate:    %g", depth, "",
        QTDEMUX_FP32_GET (buffer + 24 + i * 12));
  }
}

static void
qtdemux_dump_mdhd (GstQTDemux * qtdemux, void *buffer, int depth)
{
  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  creation time: %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  GST_LOG ("%*s  modify time:   %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 16));
  GST_LOG ("%*s  time scale:    1/%u sec", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 20));
  GST_LOG ("%*s  duration:      %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 24));
  GST_LOG ("%*s  language:      %u", depth, "",
      QTDEMUX_GUINT16_GET (buffer + 28));
  GST_LOG ("%*s  quality:       %u", depth, "",
      QTDEMUX_GUINT16_GET (buffer + 30));

}

static void
qtdemux_dump_hdlr (GstQTDemux * qtdemux, void *buffer, int depth)
{
  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  type:          " GST_FOURCC_FORMAT, depth, "",
      GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (buffer + 12)));
  GST_LOG ("%*s  subtype:       " GST_FOURCC_FORMAT, depth, "",
      GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (buffer + 16)));
  GST_LOG ("%*s  manufacturer:  " GST_FOURCC_FORMAT, depth, "",
      GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (buffer + 20)));
  GST_LOG ("%*s  flags:         %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 24));
  GST_LOG ("%*s  flags mask:    %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 28));
  GST_LOG ("%*s  name:          %*s", depth, "",
      QTDEMUX_GUINT8_GET (buffer + 32), (char *) (buffer + 33));

}

static void
qtdemux_dump_vmhd (GstQTDemux * qtdemux, void *buffer, int depth)
{
  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  mode/color:    %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 16));
}

static void
qtdemux_dump_dref (GstQTDemux * qtdemux, void *buffer, int depth)
{
  int n;
  int i;
  int offset;

  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  n entries:     %u", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  n = QTDEMUX_GUINT32_GET (buffer + 12);
  offset = 16;
  for (i = 0; i < n; i++) {
    GST_LOG ("%*s    size:          %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset));
    GST_LOG ("%*s    type:          " GST_FOURCC_FORMAT, depth, "",
        GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (buffer + offset + 4)));
    offset += QTDEMUX_GUINT32_GET (buffer + offset);
  }
}

static void
qtdemux_dump_stsd (GstQTDemux * qtdemux, void *buffer, int depth)
{
  int i;
  int n;
  int offset;

  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  n entries:     %d", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  n = QTDEMUX_GUINT32_GET (buffer + 12);
  offset = 16;
  for (i = 0; i < n; i++) {
    GST_LOG ("%*s    size:          %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset));
    GST_LOG ("%*s    type:          " GST_FOURCC_FORMAT, depth, "",
        GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (buffer + offset + 4)));
    GST_LOG ("%*s    data reference:%d", depth, "",
        QTDEMUX_GUINT16_GET (buffer + offset + 14));

    GST_LOG ("%*s    version/rev.:  %08x", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset + 16));
    GST_LOG ("%*s    vendor:        " GST_FOURCC_FORMAT, depth, "",
        GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (buffer + offset + 20)));
    GST_LOG ("%*s    temporal qual: %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset + 24));
    GST_LOG ("%*s    spatial qual:  %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset + 28));
    GST_LOG ("%*s    width:         %u", depth, "",
        QTDEMUX_GUINT16_GET (buffer + offset + 32));
    GST_LOG ("%*s    height:        %u", depth, "",
        QTDEMUX_GUINT16_GET (buffer + offset + 34));
    GST_LOG ("%*s    horiz. resol:  %g", depth, "",
        QTDEMUX_FP32_GET (buffer + offset + 36));
    GST_LOG ("%*s    vert. resol.:  %g", depth, "",
        QTDEMUX_FP32_GET (buffer + offset + 40));
    GST_LOG ("%*s    data size:     %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset + 44));
    GST_LOG ("%*s    frame count:   %u", depth, "",
        QTDEMUX_GUINT16_GET (buffer + offset + 48));
    GST_LOG ("%*s    compressor:    %d %d %d", depth, "",
        QTDEMUX_GUINT8_GET (buffer + offset + 49),
        QTDEMUX_GUINT8_GET (buffer + offset + 50),
        QTDEMUX_GUINT8_GET (buffer + offset + 51));
    //(char *) (buffer + offset + 51));
    GST_LOG ("%*s    depth:         %u", depth, "",
        QTDEMUX_GUINT16_GET (buffer + offset + 82));
    GST_LOG ("%*s    color table ID:%u", depth, "",
        QTDEMUX_GUINT16_GET (buffer + offset + 84));

    offset += QTDEMUX_GUINT32_GET (buffer + offset);
  }
}

static void
qtdemux_dump_stts (GstQTDemux * qtdemux, void *buffer, int depth)
{
  int i;
  int n;
  int offset;

  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  n entries:     %d", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  n = QTDEMUX_GUINT32_GET (buffer + 12);
  offset = 16;
  for (i = 0; i < n; i++) {
    GST_LOG ("%*s    count:         %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset));
    GST_LOG ("%*s    duration:      %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset + 4));

    offset += 8;
  }
}

static void
qtdemux_dump_stss (GstQTDemux * qtdemux, void *buffer, int depth)
{
  int i;
  int n;
  int offset;

  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  n entries:     %d", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  n = QTDEMUX_GUINT32_GET (buffer + 12);
  offset = 16;
  for (i = 0; i < n; i++) {
    GST_LOG ("%*s    sample:        %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset));

    offset += 4;
  }
}

static void
qtdemux_dump_stsc (GstQTDemux * qtdemux, void *buffer, int depth)
{
  int i;
  int n;
  int offset;

  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  n entries:     %d", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  n = QTDEMUX_GUINT32_GET (buffer + 12);
  offset = 16;
  for (i = 0; i < n; i++) {
    GST_LOG ("%*s    first chunk:   %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset));
    GST_LOG ("%*s    sample per ch: %u", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset + 4));
    GST_LOG ("%*s    sample desc id:%08x", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset + 8));

    offset += 12;
  }
}

static void
qtdemux_dump_stsz (GstQTDemux * qtdemux, void *buffer, int depth)
{
  //int i;
  int n;
  int offset;
  int sample_size;

  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  sample size:   %d", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  sample_size = QTDEMUX_GUINT32_GET (buffer + 12);
  if (sample_size == 0) {
    GST_LOG ("%*s  n entries:     %d", depth, "",
        QTDEMUX_GUINT32_GET (buffer + 16));
    n = QTDEMUX_GUINT32_GET (buffer + 16);
    offset = 20;
#if 0
    for (i = 0; i < n; i++) {
      GST_LOG ("%*s    sample size:   %u", depth, "",
          QTDEMUX_GUINT32_GET (buffer + offset));

      offset += 4;
    }
#endif
  }
}

static void
qtdemux_dump_stco (GstQTDemux * qtdemux, void *buffer, int depth)
{
  //int i;
  int n;
  int offset;

  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  n entries:     %d", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  n = QTDEMUX_GUINT32_GET (buffer + 12);
  offset = 16;
#if 0
  for (i = 0; i < n; i++) {
    GST_LOG ("%*s    chunk offset:  %08x", depth, "",
        QTDEMUX_GUINT32_GET (buffer + offset));

    offset += 4;
  }
#endif
}

static void
qtdemux_dump_co64 (GstQTDemux * qtdemux, void *buffer, int depth)
{
  //int i;
  int n;
  int offset;

  GST_LOG ("%*s  version/flags: %08x", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 8));
  GST_LOG ("%*s  n entries:     %d", depth, "",
      QTDEMUX_GUINT32_GET (buffer + 12));
  n = QTDEMUX_GUINT32_GET (buffer + 12);
  offset = 16;
#if 0
  for (i = 0; i < n; i++) {
    GST_LOG ("%*s    chunk offset:  %" G_GUINT64_FORMAT, depth, "",
        QTDEMUX_GUINT64_GET (buffer + offset));

    offset += 8;
  }
#endif
}

static void
qtdemux_dump_dcom (GstQTDemux * qtdemux, void *buffer, int depth)
{
  GST_LOG ("%*s  compression type: " GST_FOURCC_FORMAT, depth, "",
      GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (buffer + 8)));
}

static void
qtdemux_dump_cmvd (GstQTDemux * qtdemux, void *buffer, int depth)
{
  GST_LOG ("%*s  length: %d", depth, "", QTDEMUX_GUINT32_GET (buffer + 8));
}

static void
qtdemux_dump_unknown (GstQTDemux * qtdemux, void *buffer, int depth)
{
  int len;

  GST_LOG ("%*s  length: %d", depth, "", QTDEMUX_GUINT32_GET (buffer + 0));

  len = QTDEMUX_GUINT32_GET (buffer + 0);
  gst_util_dump_mem (buffer, len);

}


static GNode *
qtdemux_tree_get_child_by_type (GNode * node, guint32 fourcc)
{
  GNode *child;
  void *buffer;
  guint32 child_fourcc;

  for (child = g_node_first_child (node); child;
      child = g_node_next_sibling (child)) {
    buffer = child->data;

    child_fourcc = GST_READ_UINT32_LE (buffer + 4);

    if (child_fourcc == fourcc) {
      return child;
    }
  }
  return NULL;
}

static GNode *
qtdemux_tree_get_sibling_by_type (GNode * node, guint32 fourcc)
{
  GNode *child;
  void *buffer;
  guint32 child_fourcc;

  for (child = g_node_next_sibling (node); child;
      child = g_node_next_sibling (child)) {
    buffer = child->data;

    child_fourcc = GST_READ_UINT32_LE (buffer + 4);

    if (child_fourcc == fourcc) {
      return child;
    }
  }
  return NULL;
}

static void qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak);

static void
qtdemux_parse_tree (GstQTDemux * qtdemux)
{
  GNode *mvhd;
  GNode *trak;
  GNode *udta;

  udta = qtdemux_tree_get_child_by_type (qtdemux->moov_node, FOURCC_udta);
  if (udta) {
    qtdemux_parse_udta (qtdemux, udta);

    if (qtdemux->tag_list) {
      GST_DEBUG ("calling gst_element_found_tags with %s\n",
          gst_structure_to_string (qtdemux->tag_list));
      gst_element_found_tags (GST_ELEMENT (qtdemux), qtdemux->tag_list);
    }
  } else {
    GST_LOG ("No udta node found.");
  }

  mvhd = qtdemux_tree_get_child_by_type (qtdemux->moov_node, FOURCC_mvhd);
  if (mvhd == NULL) {
    GST_LOG ("No mvhd node found.");
    return;
  }

  qtdemux->timescale = QTDEMUX_GUINT32_GET (mvhd->data + 20);
  qtdemux->duration = QTDEMUX_GUINT32_GET (mvhd->data + 24);

  GST_INFO ("timescale: %d", qtdemux->timescale);
  GST_INFO ("duration: %d", qtdemux->duration);

  trak = qtdemux_tree_get_child_by_type (qtdemux->moov_node, FOURCC_trak);
  qtdemux_parse_trak (qtdemux, trak);

/*  trak = qtdemux_tree_get_sibling_by_type(trak, FOURCC_trak);
  if(trak)qtdemux_parse_trak(qtdemux, trak);*/

  while ((trak = qtdemux_tree_get_sibling_by_type (trak, FOURCC_trak)) != NULL)
    qtdemux_parse_trak (qtdemux, trak);

  gst_element_no_more_pads (GST_ELEMENT (qtdemux));
}

static void
qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
{
  int offset;
  GNode *tkhd;
  GNode *mdia;
  GNode *mdhd;
  GNode *hdlr;
  GNode *minf;
  GNode *stbl;
  GNode *stsd;
  GNode *stsc;
  GNode *stsz;
  GNode *stco;
  GNode *co64;
  GNode *stts;
  GNode *mp4a;
  GNode *mp4v;
  GNode *wave;
  GNode *esds;
  int n_samples;
  QtDemuxSample *samples;
  int n_samples_per_chunk;
  int index;
  int i, j, k;
  QtDemuxStream *stream;
  int n_sample_times;
  guint64 timestamp;
  int sample_size;
  int sample_index;

  stream = g_new0 (QtDemuxStream, 1);

  tkhd = qtdemux_tree_get_child_by_type (trak, FOURCC_tkhd);
  g_assert (tkhd);

  GST_LOG ("track[tkhd] version/flags: 0x%08x",
      QTDEMUX_GUINT32_GET (tkhd->data + 8));

  /* track duration? */

  mdia = qtdemux_tree_get_child_by_type (trak, FOURCC_mdia);
  g_assert (mdia);

  mdhd = qtdemux_tree_get_child_by_type (mdia, FOURCC_mdhd);
  g_assert (mdhd);

  stream->timescale = QTDEMUX_GUINT32_GET (mdhd->data + 20);
  GST_LOG ("track timescale: %d", stream->timescale);
  GST_LOG ("track duration: %d", QTDEMUX_GUINT32_GET (mdhd->data + 24));

  /* HACK:
   * some of those trailers, nowadays, have prologue images that are
   * themselves vide tracks as well. I haven't really found a way to
   * identify those yet, except for just looking at their duration. */
  if ((guint64) QTDEMUX_GUINT32_GET (mdhd->data + 24) *
      qtdemux->timescale * 10 / (stream->timescale * qtdemux->duration) < 2) {
    GST_WARNING ("Track shorter than 20%% (%d/%d vs. %d/%d) of the stream "
        "found, assuming preview image or something; skipping track",
        QTDEMUX_GUINT32_GET (mdhd->data + 24), stream->timescale,
        qtdemux->duration, qtdemux->timescale);
    return;
  }

  hdlr = qtdemux_tree_get_child_by_type (mdia, FOURCC_hdlr);
  g_assert (hdlr);

  GST_LOG ("track type: " GST_FOURCC_FORMAT,
      GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (hdlr->data + 12)));
  GST_LOG ("track subtype: " GST_FOURCC_FORMAT,
      GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (hdlr->data + 16)));

  stream->subtype = QTDEMUX_FOURCC_GET (hdlr->data + 16);

  minf = qtdemux_tree_get_child_by_type (mdia, FOURCC_minf);
  g_assert (minf);

  stbl = qtdemux_tree_get_child_by_type (minf, FOURCC_stbl);
  g_assert (stbl);

  stsd = qtdemux_tree_get_child_by_type (stbl, FOURCC_stsd);
  g_assert (stsd);

  if (stream->subtype == FOURCC_vide) {
    guint32 fourcc;

    offset = 16;
    GST_LOG ("st type:          " GST_FOURCC_FORMAT,
        GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (stsd->data + offset + 4)));

    stream->width = QTDEMUX_GUINT16_GET (stsd->data + offset + 32);
    stream->height = QTDEMUX_GUINT16_GET (stsd->data + offset + 34);
    stream->fps = 0.;           /* this is filled in later */

    GST_LOG ("frame count:   %u",
        QTDEMUX_GUINT16_GET (stsd->data + offset + 48));

    fourcc = QTDEMUX_FOURCC_GET (stsd->data + offset + 4);
    stream->caps = qtdemux_video_caps (qtdemux, fourcc, stsd->data);

    esds = NULL;
    mp4v = qtdemux_tree_get_child_by_type (stsd, FOURCC_mp4v);
    if (mp4v == NULL) {
      /* HACK */
      mp4v = qtdemux_tree_get_child_by_type (stsd, FOURCC_SVQ3);
    }
    if (mp4v)
      esds = qtdemux_tree_get_child_by_type (mp4v, FOURCC_esds);

    if (esds) {
      gst_qtdemux_handle_esds (qtdemux, stream, esds);
    }

    GST_INFO ("type " GST_FOURCC_FORMAT " caps %" GST_PTR_FORMAT,
        GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (stsd->data + offset + 4)),
        stream->caps);
  } else if (stream->subtype == FOURCC_soun) {
    int version, samplesize;
    guint32 fourcc;
    int len;

    len = QTDEMUX_GUINT32_GET (stsd->data + 16);
    GST_LOG ("st type:          " GST_FOURCC_FORMAT,
        GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (stsd->data + 16 + 4)));

    fourcc = QTDEMUX_FOURCC_GET (stsd->data + 16 + 4);

    offset = 32;
    GST_LOG ("version/rev:      %08x",
        QTDEMUX_GUINT32_GET (stsd->data + offset));
    version = QTDEMUX_GUINT32_GET (stsd->data + offset);
    GST_LOG ("vendor:           %08x",
        QTDEMUX_GUINT32_GET (stsd->data + offset + 4));
    GST_LOG ("n_channels:       %d",
        QTDEMUX_GUINT16_GET (stsd->data + offset + 8));
    stream->n_channels = QTDEMUX_GUINT16_GET (stsd->data + offset + 8);
    GST_LOG ("sample_size:      %d",
        QTDEMUX_GUINT16_GET (stsd->data + offset + 10));
    samplesize = QTDEMUX_GUINT16_GET (stsd->data + offset + 10);
    GST_LOG ("compression_id:   %d",
        QTDEMUX_GUINT16_GET (stsd->data + offset + 12));
    GST_LOG ("packet size:      %d",
        QTDEMUX_GUINT16_GET (stsd->data + offset + 14));
    GST_LOG ("sample rate:      %g",
        QTDEMUX_FP32_GET (stsd->data + offset + 16));
    stream->rate = QTDEMUX_FP32_GET (stsd->data + offset + 16);

    offset = 52;
    if (version == 0x00010000) {
      GST_LOG ("samples/packet:   %d",
          QTDEMUX_GUINT32_GET (stsd->data + offset));
      stream->samples_per_packet = QTDEMUX_GUINT32_GET (stsd->data + offset);
      GST_LOG ("bytes/packet:     %d",
          QTDEMUX_GUINT32_GET (stsd->data + offset + 4));
      GST_LOG ("bytes/frame:      %d",
          QTDEMUX_GUINT32_GET (stsd->data + offset + 8));
      stream->bytes_per_frame = QTDEMUX_GUINT32_GET (stsd->data + offset + 8);
      GST_LOG ("bytes/sample:     %d",
          QTDEMUX_GUINT32_GET (stsd->data + offset + 12));
      stream->compression = 1;
      offset = 68;
    } else if (version == 0x00000000) {
      stream->bytes_per_frame = stream->n_channels * samplesize / 8;
      stream->samples_per_packet = 1;
      stream->compression = 1;

      /* Yes, these have to be hard-coded */
      if (fourcc == GST_MAKE_FOURCC ('M', 'A', 'C', '6'))
        stream->compression = 6;
      if (fourcc == GST_MAKE_FOURCC ('M', 'A', 'C', '3'))
        stream->compression = 3;
      if (fourcc == GST_MAKE_FOURCC ('i', 'm', 'a', '4'))
        stream->compression = 4;
    } else {
      GST_ERROR ("unknown version %08x", version);
    }

    stream->caps = qtdemux_audio_caps (qtdemux, fourcc, NULL, 0);

    mp4a = qtdemux_tree_get_child_by_type (stsd, FOURCC_mp4a);
    wave = NULL;
    if (mp4a)
      wave = qtdemux_tree_get_child_by_type (mp4a, FOURCC_wave);
    esds = NULL;
    if (wave)
      esds = qtdemux_tree_get_child_by_type (wave, FOURCC_esds);
    if (esds) {
      gst_qtdemux_handle_esds (qtdemux, stream, esds);
#if 0
      GstBuffer *buffer;
      int len = QTDEMUX_GUINT32_GET (esds->data);

      buffer = gst_buffer_new_and_alloc (len - 8);
      memcpy (GST_BUFFER_DATA (buffer), esds->data + 8, len - 8);

      gst_caps_set_simple (stream->caps, "codec_data",
          GST_TYPE_BUFFER, buffer, NULL);
#endif
    }
    GST_INFO ("type " GST_FOURCC_FORMAT " caps %" GST_PTR_FORMAT,
        GST_FOURCC_ARGS (QTDEMUX_FOURCC_GET (stsd->data + 16 + 4)),
        stream->caps);
  } else {
    GST_INFO ("unknown subtype " GST_FOURCC_FORMAT,
        GST_FOURCC_ARGS (stream->subtype));
    return;
  }

  /* sample to chunk */
  stsc = qtdemux_tree_get_child_by_type (stbl, FOURCC_stsc);
  g_assert (stsc);
  /* sample size */
  stsz = qtdemux_tree_get_child_by_type (stbl, FOURCC_stsz);
  g_assert (stsz);
  /* chunk offsets */
  stco = qtdemux_tree_get_child_by_type (stbl, FOURCC_stco);
  co64 = qtdemux_tree_get_child_by_type (stbl, FOURCC_co64);
  g_assert (stco || co64);
  /* sample time */
  stts = qtdemux_tree_get_child_by_type (stbl, FOURCC_stts);
  g_assert (stts);

  sample_size = QTDEMUX_GUINT32_GET (stsz->data + 12);
  if (sample_size == 0) {
    n_samples = QTDEMUX_GUINT32_GET (stsz->data + 16);
    stream->n_samples = n_samples;
    samples = g_malloc (sizeof (QtDemuxSample) * n_samples);
    stream->samples = samples;

    for (i = 0; i < n_samples; i++) {
      samples[i].size = QTDEMUX_GUINT32_GET (stsz->data + i * 4 + 20);
    }
    n_samples_per_chunk = QTDEMUX_GUINT32_GET (stsc->data + 12);
    index = 0;
    offset = 16;
    for (i = 0; i < n_samples_per_chunk; i++) {
      int first_chunk, last_chunk;
      int samples_per_chunk;

      first_chunk = QTDEMUX_GUINT32_GET (stsc->data + 16 + i * 12 + 0) - 1;
      if (i == n_samples_per_chunk - 1) {
        last_chunk = INT_MAX;
      } else {
        last_chunk = QTDEMUX_GUINT32_GET (stsc->data + 16 + i * 12 + 12) - 1;
      }
      samples_per_chunk = QTDEMUX_GUINT32_GET (stsc->data + 16 + i * 12 + 4);

      for (j = first_chunk; j < last_chunk; j++) {
        int chunk_offset;

        if (stco) {
          chunk_offset = QTDEMUX_GUINT32_GET (stco->data + 16 + j * 4);
        } else {
          chunk_offset = QTDEMUX_GUINT64_GET (co64->data + 16 + j * 8);
        }
        for (k = 0; k < samples_per_chunk; k++) {
          samples[index].chunk = j;
          samples[index].offset = chunk_offset;
          chunk_offset += samples[index].size;
          index++;
          if (index >= n_samples)
            goto done;
        }
      }
    }
  done:

    n_sample_times = QTDEMUX_GUINT32_GET (stts->data + 12);
    timestamp = 0;
    index = 0;
    for (i = 0; i < n_sample_times; i++) {
      int n;
      int duration;
      guint64 time;

      n = QTDEMUX_GUINT32_GET (stts->data + 16 + 8 * i);
      duration = QTDEMUX_GUINT32_GET (stts->data + 16 + 8 * i + 4);
      time = (GST_SECOND * duration) / stream->timescale;
      for (j = 0; j < n; j++) {
        //GST_INFO("moo %lld", timestamp);
        samples[index].timestamp = timestamp;
        samples[index].duration = time;
        timestamp += time;
        index++;
      }
    }
  } else {
    int sample_width;
    guint64 timestamp = 0;

    GST_LOG ("treating chunks as samples");

    /* treat chunks as samples */
    if (stco) {
      n_samples = QTDEMUX_GUINT32_GET (stco->data + 12);
    } else {
      n_samples = QTDEMUX_GUINT32_GET (co64->data + 12);
    }
    stream->n_samples = n_samples;
    samples = g_malloc (sizeof (QtDemuxSample) * n_samples);
    stream->samples = samples;

    sample_width = QTDEMUX_GUINT16_GET (stsd->data + offset + 10) / 8;

    n_samples_per_chunk = QTDEMUX_GUINT32_GET (stsc->data + 12);
    offset = 16;
    sample_index = 0;
    for (i = 0; i < n_samples_per_chunk; i++) {
      int first_chunk, last_chunk;
      int samples_per_chunk;

      first_chunk = QTDEMUX_GUINT32_GET (stsc->data + 16 + i * 12 + 0) - 1;
      if (i == n_samples - 1) {
        last_chunk = INT_MAX;
      } else {
        last_chunk = QTDEMUX_GUINT32_GET (stsc->data + 16 + i * 12 + 12) - 1;
      }
      samples_per_chunk = QTDEMUX_GUINT32_GET (stsc->data + 16 + i * 12 + 4);

      for (j = first_chunk; j < last_chunk; j++) {
        int chunk_offset;

        if (j >= n_samples)
          goto done2;
        if (stco) {
          chunk_offset = QTDEMUX_GUINT32_GET (stco->data + 16 + j * 4);
        } else {
          chunk_offset = QTDEMUX_GUINT64_GET (co64->data + 16 + j * 8);
        }
        samples[j].chunk = j;
        samples[j].offset = chunk_offset;
        if (stream->samples_per_packet * stream->compression != 0)
          samples[j].size =
              samples_per_chunk * stream->bytes_per_frame /
              stream->samples_per_packet / stream->compression;
        else
          samples[j].size = stream->bytes_per_frame;
        samples[j].duration =
            samples_per_chunk * GST_SECOND / (stream->rate / 2);
        samples[j].timestamp = timestamp;
        timestamp += (samples_per_chunk * GST_SECOND) / stream->rate;
#if 0
        GST_INFO ("moo samples_per_chunk=%d rate=%d dur=%lld %lld",
            (int) samples_per_chunk,
            (int) stream->rate,
            (long long) ((samples_per_chunk * GST_SECOND) / stream->rate),
            (long long) timestamp);
#endif
        samples[j].sample_index = sample_index;
        sample_index += samples_per_chunk;
      }
    }
#if 0
  done2:
    n_sample_times = QTDEMUX_GUINT32_GET (stts->data + 12);
    GST_LOG ("n_sample_times = %d", n_sample_times);
    timestamp = 0;
    index = 0;
    sample_index = 0;
    for (i = 0; i < n_sample_times; i++) {
      int duration;
      guint64 time;

      sample_index += QTDEMUX_GUINT32_GET (stts->data + 16 + 8 * i);
      duration = QTDEMUX_GUINT32_GET (stts->data + 16 + 8 * i + 4);
      for (; index < n_samples && samples[index].sample_index < sample_index;
          index++) {
        int size;

        samples[index].timestamp = timestamp;
        size = samples[index + 1].sample_index - samples[index].sample_index;
        time = GST_SECOND / stream->rate;       //(GST_SECOND * duration * samples[index].size)/stream->timescale ;
        timestamp += time;
        samples[index].duration = time;
      }
    }
#endif
  }
done2:
#if 0
  for (i = 0; i < n_samples; i++) {
    GST_LOG ("%d: %d %d %d %d %" G_GUINT64_FORMAT, i,
        samples[i].sample_index, samples[i].chunk,
        samples[i].offset, samples[i].size, samples[i].timestamp);
    if (i > 10)
      break;
  }
#endif
  gst_qtdemux_add_stream (qtdemux, stream);
}

static void
qtdemux_parse_udta (GstQTDemux * qtdemux, GNode * udta)
{
  GNode *meta;
  GNode *ilst;
  GNode *node;

  meta = qtdemux_tree_get_child_by_type (udta, FOURCC_meta);
  if (meta == NULL) {
    GST_LOG ("no meta");
    return;
  }

  ilst = qtdemux_tree_get_child_by_type (meta, FOURCC_ilst);
  if (ilst == NULL) {
    GST_LOG ("no ilst");
    return;
  }

  GST_DEBUG ("new tag list\n");
  qtdemux->tag_list = gst_tag_list_new ();

  node = qtdemux_tree_get_child_by_type (ilst, FOURCC__nam);
  if (node) {
    qtdemux_tag_add_str (qtdemux, GST_TAG_TITLE, node);
  }

  node = qtdemux_tree_get_child_by_type (ilst, FOURCC__ART);
  if (node) {
    qtdemux_tag_add_str (qtdemux, GST_TAG_ARTIST, node);
  } else {
    node = qtdemux_tree_get_child_by_type (ilst, FOURCC__wrt);
    if (node) {
      qtdemux_tag_add_str (qtdemux, GST_TAG_ARTIST, node);
    } else {
      node = qtdemux_tree_get_child_by_type (ilst, FOURCC__grp);
      if (node) {
        qtdemux_tag_add_str (qtdemux, GST_TAG_ARTIST, node);
      }
    }
  }

  node = qtdemux_tree_get_child_by_type (ilst, FOURCC__alb);
  if (node) {
    qtdemux_tag_add_str (qtdemux, GST_TAG_ALBUM, node);
  }

  node = qtdemux_tree_get_child_by_type (ilst, FOURCC_trkn);
  if (node) {
    qtdemux_tag_add_num (qtdemux, GST_TAG_TRACK_NUMBER,
        GST_TAG_TRACK_COUNT, node);
  }

  node = qtdemux_tree_get_child_by_type (ilst, FOURCC_disc);
  if (node) {
    qtdemux_tag_add_num (qtdemux, GST_TAG_ALBUM_VOLUME_NUMBER,
        GST_TAG_ALBUM_VOLUME_COUNT, node);
  }

  node = qtdemux_tree_get_child_by_type (ilst, FOURCC_gnre);
  if (node) {
    qtdemux_tag_add_gnre (qtdemux, GST_TAG_GENRE, node);
  }
}

static void
qtdemux_tag_add_str (GstQTDemux * qtdemux, const char *tag, GNode * node)
{
  GNode *data;
  char *s;
  int len;
  int type;

  data = qtdemux_tree_get_child_by_type (node, FOURCC_data);
  if (data) {
    len = QTDEMUX_GUINT32_GET (data->data);
    type = QTDEMUX_GUINT32_GET (data->data + 8);
    if (type == 0x00000001) {
      s = g_strndup ((char *) data->data + 16, len - 16);
      GST_DEBUG ("adding tag %s\n", s);
      gst_tag_list_add (qtdemux->tag_list, GST_TAG_MERGE_REPLACE, tag, s, NULL);
      g_free (s);
    }
  }
}

static void
qtdemux_tag_add_num (GstQTDemux * qtdemux, const char *tag1,
    const char *tag2, GNode * node)
{
  GNode *data;
  int len;
  int type;
  int n1, n2;

  data = qtdemux_tree_get_child_by_type (node, FOURCC_data);
  if (data) {
    len = QTDEMUX_GUINT32_GET (data->data);
    type = QTDEMUX_GUINT32_GET (data->data + 8);
    if (type == 0x00000000 && len >= 22) {
      n1 = GST_READ_UINT16_BE (data->data + 18);
      n2 = GST_READ_UINT16_BE (data->data + 20);
      GST_DEBUG ("adding tag %d/%d\n", n1, n2);
      gst_tag_list_add (qtdemux->tag_list, GST_TAG_MERGE_REPLACE,
          tag1, n1, tag2, n2, NULL);
    }
  }
}

static void
qtdemux_tag_add_gnre (GstQTDemux * qtdemux, const char *tag, GNode * node)
{
  const gchar *genres[] = {
    "N/A", "Blues", "Classic Rock", "Country", "Dance", "Disco",
    "Funk", "Grunge", "Hip-Hop", "Jazz", "Metal", "New Age", "Oldies",
    "Other", "Pop", "R&B", "Rap", "Reggae", "Rock", "Techno",
    "Industrial", "Alternative", "Ska", "Death Metal", "Pranks",
    "Soundtrack", "Euro-Techno", "Ambient", "Trip-Hop", "Vocal",
    "Jazz+Funk", "Fusion", "Trance", "Classical", "Instrumental",
    "Acid", "House", "Game", "Sound Clip", "Gospel", "Noise",
    "AlternRock", "Bass", "Soul", "Punk", "Space", "Meditative",
    "Instrumental Pop", "Instrumental Rock", "Ethnic", "Gothic",
    "Darkwave", "Techno-Industrial", "Electronic", "Pop-Folk",
    "Eurodance", "Dream", "Southern Rock", "Comedy", "Cult", "Gangsta",
    "Top 40", "Christian Rap", "Pop/Funk", "Jungle", "Native American",
    "Cabaret", "New Wave", "Psychadelic", "Rave", "Showtunes",
    "Trailer", "Lo-Fi", "Tribal", "Acid Punk", "Acid Jazz", "Polka",
    "Retro", "Musical", "Rock & Roll", "Hard Rock", "Folk",
    "Folk/Rock", "National Folk", "Swing", "Fast-Fusion", "Bebob",
    "Latin", "Revival", "Celtic", "Bluegrass", "Avantgarde",
    "Gothic Rock", "Progressive Rock", "Psychedelic Rock",
    "Symphonic Rock", "Slow Rock", "Big Band", "Chorus",
    "Easy Listening", "Acoustic", "Humour", "Speech", "Chanson",
    "Opera", "Chamber Music", "Sonata", "Symphony", "Booty Bass",
    "Primus", "Porn Groove", "Satire", "Slow Jam", "Club", "Tango",
    "Samba", "Folklore", "Ballad", "Power Ballad", "Rhythmic Soul",
    "Freestyle", "Duet", "Punk Rock", "Drum Solo", "A capella",
    "Euro-House", "Dance Hall", "Goa", "Drum & Bass", "Club House",
    "Hardcore", "Terror", "Indie", "BritPop", "NegerPunk",
    "Polsk Punk", "Beat", "Christian Gangsta", "Heavy Metal",
    "Black Metal", "Crossover", "Contemporary C", "Christian Rock",
    "Merengue", "Salsa", "Thrash Metal", "Anime", "JPop", "SynthPop"
  };
  GNode *data;
  int len;
  int type;
  int n;

  data = qtdemux_tree_get_child_by_type (node, FOURCC_data);
  if (data) {
    len = QTDEMUX_GUINT32_GET (data->data);
    type = QTDEMUX_GUINT32_GET (data->data + 8);
    if (type == 0x00000000 && len >= 18) {
      n = GST_READ_UINT16_BE (data->data + 16);
      if (n > 0 && n < sizeof (genres) / sizeof (char *)) {
        GST_DEBUG ("adding %d [%s]\n", n, genres[n]);
        gst_tag_list_add (qtdemux->tag_list, GST_TAG_MERGE_REPLACE,
            tag, genres[n], NULL);
      }
    }
  }
}

/* taken from ffmpeg */
static unsigned int
get_size (guint8 * ptr, guint8 ** end)
{
  int count = 4;
  int len = 0;

  while (count--) {
    int c = *ptr;

    ptr++;
    len = (len << 7) | (c & 0x7f);
    if (!(c & 0x80))
      break;
  }
  if (end)
    *end = ptr;
  return len;
}

static void
gst_qtdemux_handle_esds (GstQTDemux * qtdemux, QtDemuxStream * stream,
    GNode * esds)
{
  int len = QTDEMUX_GUINT32_GET (esds->data);
  guint8 *ptr = esds->data;
  guint8 *end = ptr + len;
  int tag;
  guint8 *data_ptr = NULL;
  int data_len = 0;

  gst_util_dump_mem (ptr, len);
  ptr += 8;
  GST_DEBUG ("version/flags = %08x\n", QTDEMUX_GUINT32_GET (ptr));
  ptr += 4;
  while (ptr < end) {
    tag = QTDEMUX_GUINT8_GET (ptr);
    GST_DEBUG ("tag = %02x\n", tag);
    ptr++;
    len = get_size (ptr, &ptr);
    GST_DEBUG ("len = %d\n", len);

    switch (tag) {
      case 0x03:
        GST_DEBUG ("ID %04x\n", QTDEMUX_GUINT16_GET (ptr));
        GST_DEBUG ("priority %04x\n", QTDEMUX_GUINT8_GET (ptr + 2));
        ptr += 3;
        break;
      case 0x04:
        GST_DEBUG ("object_type_id %02x\n", QTDEMUX_GUINT8_GET (ptr));
        GST_DEBUG ("stream_type %02x\n", QTDEMUX_GUINT8_GET (ptr + 1));
        GST_DEBUG ("buffer_size_db %02x\n", QTDEMUX_GUINT24_GET (ptr + 2));
        GST_DEBUG ("max bitrate %d\n", QTDEMUX_GUINT32_GET (ptr + 5));
        GST_DEBUG ("avg bitrate %d\n", QTDEMUX_GUINT32_GET (ptr + 9));
        ptr += 13;
        break;
      case 0x05:
        GST_DEBUG ("data:\n");
        gst_util_dump_mem (ptr, len);
        data_ptr = ptr;
        data_len = len;
        ptr += len;
        break;
      case 0x06:
        GST_DEBUG ("data %02x\n", QTDEMUX_GUINT8_GET (ptr));
        ptr += 1;
        break;
      default:
        GST_ERROR ("parse error\n");
    }
  }

  if (data_ptr) {
    GstBuffer *buffer;

    buffer = gst_buffer_new_and_alloc (data_len);
    memcpy (GST_BUFFER_DATA (buffer), data_ptr, data_len);
    gst_util_dump_mem (GST_BUFFER_DATA (buffer), data_len);

    gst_caps_set_simple (stream->caps, "codec_data", GST_TYPE_BUFFER,
        buffer, NULL);
  }
}

static GstCaps *
qtdemux_video_caps (GstQTDemux * qtdemux, guint32 fourcc,
    const guint8 * stsd_data)
{
  switch (fourcc) {
    case GST_MAKE_FOURCC ('j', 'p', 'e', 'g'):
      /* JPEG */
      return gst_caps_from_string ("image/jpeg");
    case GST_MAKE_FOURCC ('m', 'j', 'p', 'a'):
      /* Motion-JPEG (format A) */
      return gst_caps_from_string ("image/jpeg");
    case GST_MAKE_FOURCC ('m', 'j', 'p', 'b'):
      /* Motion-JPEG (format B) */
      return gst_caps_from_string ("image/jpeg");
    case GST_MAKE_FOURCC ('S', 'V', 'Q', '3'):
      if (stsd_data != NULL) {
        gst_getbits_t gb;
        gint halfpel_flag;
        gint thirdpel_flag;
        gint unknown_svq3_flag;
        gint low_delay;
        gint size;

        size = QTDEMUX_GUINT32_GET (stsd_data + 16);

        gst_getbits_init (&gb, NULL, NULL);
        gst_getbits_newbuf (&gb, (unsigned char *) stsd_data + 98 + 16 + 4,
            (size - 102 + 16));

        /* Infos ripped from ffmpeg see libavcodec/svq3.c */

        /* 'frame size code' and optional 'width, height' */
        if (gst_getbitsn (&gb, 3) == 7) {
          gst_getbitsn (&gb, 12);
          gst_getbitsn (&gb, 12);
        }

        halfpel_flag = gst_get1bit (&gb);
        thirdpel_flag = gst_get1bit (&gb);

        /* unknown fields */
        gst_get1bit (&gb);
        gst_get1bit (&gb);
        gst_get1bit (&gb);
        gst_get1bit (&gb);

        low_delay = gst_get1bit (&gb);

        /* unknown field */
        gst_get1bit (&gb);

        while (gst_get1bit (&gb)) {
          gst_getbitsn (&gb, 8);
        }

        unknown_svq3_flag = gst_get1bit (&gb);

        return gst_caps_new_simple ("video/x-svq",
            "svqversion", G_TYPE_INT, 3,
            "halfpel_flag", G_TYPE_INT, halfpel_flag,
            "thirdpel_flag", G_TYPE_INT, thirdpel_flag,
            "low_delay", G_TYPE_INT, low_delay,
            "unknown_svq3_flag", G_TYPE_INT, unknown_svq3_flag, NULL);
      }
      return gst_caps_from_string ("video/x-svq, " "svqversion = (int) 3");
    case GST_MAKE_FOURCC ('s', 'v', 'q', 'i'):
    case GST_MAKE_FOURCC ('S', 'V', 'Q', '1'):
      return gst_caps_from_string ("video/x-svq, " "svqversion = (int) 1");
    case GST_MAKE_FOURCC ('r', 'a', 'w', ' '):
      /* uncompressed RGB */
      return gst_caps_from_string ("video/x-raw-rgb, "
          "endianness = (int) BIG_ENDIAN");
      /*"bpp", GST_PROPS_INT(x),
         "depth", GST_PROPS_INT(x),
         "red_mask", GST_PROPS_INT(x),
         "green_mask", GST_PROPS_INT(x),
         "blue_mask", GST_PROPS_INT(x), FIXME! */
    case GST_MAKE_FOURCC ('Y', 'u', 'v', '2'):
      /* uncompressed YUV2 */
      return gst_caps_from_string ("video/x-raw-yuv, "
          "format = (fourcc) YUY2");
    case GST_MAKE_FOURCC ('m', 'p', 'e', 'g'):
      /* MPEG */
      return gst_caps_from_string ("video/mpeg, "
          "systemstream = (boolean) false, " "mpegversion = (int) 1");
    case GST_MAKE_FOURCC ('g', 'i', 'f', ' '):
      return gst_caps_from_string ("image/gif");
    case GST_MAKE_FOURCC ('h', '2', '6', '3'):
    case GST_MAKE_FOURCC ('s', '2', '6', '3'):
      /* H.263 */
      /* ffmpeg uses the height/width props, don't know why */
      return gst_caps_from_string ("video/x-h263");
    case GST_MAKE_FOURCC ('m', 'p', '4', 'v'):
      /* MPEG-4 */
      return gst_caps_from_string ("video/mpeg, "
          "mpegversion = (int) 4, " "systemstream = (boolean) false");
    case GST_MAKE_FOURCC ('3', 'I', 'V', '1'):
      return gst_caps_from_string ("video/x-3ivx");
    case GST_MAKE_FOURCC ('c', 'v', 'i', 'd'):
      /* Cinepak */
      return gst_caps_from_string ("video/x-cinepak");
    case GST_MAKE_FOURCC ('r', 'p', 'z', 'a'):
      /* Apple Video */
      return gst_caps_from_string ("video/x-apple-video");
    case GST_MAKE_FOURCC ('a', 'v', 'c', '1'):
      /* H.264/AVC */
      return gst_caps_from_string ("video/x-h264");
    case GST_MAKE_FOURCC ('r', 'l', 'e', ' '):
      /* Run-length encoding */
    case GST_MAKE_FOURCC ('s', 'm', 'c', ' '):
    case GST_MAKE_FOURCC ('k', 'p', 'c', 'd'):
    default:
#if 0
      g_critical ("Don't know how to convert fourcc '" GST_FOURCC_FORMAT
          "' to caps\n", GST_FOURCC_ARGS (fourcc));
      return NULL;
#endif
      {
        char *s;

        s = g_strdup_printf ("video/x-gst-fourcc-" GST_FOURCC_FORMAT,
            GST_FOURCC_ARGS (fourcc));
        return gst_caps_new_simple (s, NULL);
      }
  }
}

static GstCaps *
qtdemux_audio_caps (GstQTDemux * qtdemux, guint32 fourcc, const guint8 * data,
    int len)
{
  switch (fourcc) {
#if 0
    case GST_MAKE_FOURCC ('N', 'O', 'N', 'E'):
      return NULL;              /*gst_caps_from_string ("audio/raw"); */
#endif
    case GST_MAKE_FOURCC ('r', 'a', 'w', ' '):
      /* FIXME */
      return gst_caps_from_string ("audio/x-raw-int, "
          "width = (int) 8, " "depth = (int) 8, " "signed = (boolean) true");
    case GST_MAKE_FOURCC ('t', 'w', 'o', 's'):
      /* FIXME */
      return gst_caps_from_string ("audio/x-raw-int, "
          "width = (int) 16, "
          "depth = (int) 16, "
          "endianness = (int) BIG_ENDIAN, " "signed = (boolean) true");
    case GST_MAKE_FOURCC ('s', 'o', 'w', 't'):
      /* FIXME */
      return gst_caps_from_string ("audio/x-raw-int, "
          "width = (int) 16, "
          "depth = (int) 16, "
          "endianness = (int) G_LITTLE_ENDIAN, " "signed = (boolean) true");
    case GST_MAKE_FOURCC ('f', 'l', '6', '4'):
      return gst_caps_from_string ("audio/x-raw-float, "
          "width = (int) 64, " "endianness = (int) G_BIG_ENDIAN");
    case GST_MAKE_FOURCC ('f', 'l', '3', '2'):
      return gst_caps_from_string ("audio/x-raw-float, "
          "width = (int) 32, " "endianness = (int) G_BIG_ENDIAN");
    case GST_MAKE_FOURCC ('i', 'n', '2', '4'):
      /* FIXME */
      return gst_caps_from_string ("audio/x-raw-int, "
          "width = (int) 24, "
          "depth = (int) 32, "
          "endianness = (int) G_BIG_ENDIAN, " "signed = (boolean) true");
    case GST_MAKE_FOURCC ('i', 'n', '3', '2'):
      /* FIXME */
      return gst_caps_from_string ("audio/x-raw-int, "
          "width = (int) 32, "
          "depth = (int) 32, "
          "endianness = (int) G_BIG_ENDIAN, " "signed = (boolean) true");
    case GST_MAKE_FOURCC ('u', 'l', 'a', 'w'):
      /* FIXME */
      return gst_caps_from_string ("audio/x-mulaw");
    case GST_MAKE_FOURCC ('a', 'l', 'a', 'w'):
      /* FIXME */
      return gst_caps_from_string ("audio/x-alaw");
    case 0x6d730002:
      /* Microsoft ADPCM-ACM code 2 */
      return gst_caps_from_string ("audio/x-adpcm, "
          "layout = (string) microsoft");
    case 0x6d730011:
      /* FIXME DVI/Intel IMA ADPCM/ACM code 17 */
      return gst_caps_from_string ("audio/x-adpcm, "
          "layout = (string) quicktime");
    case 0x6d730055:
      /* MPEG layer 3, CBR only (pre QT4.1) */
    case 0x5500736d:
    case GST_MAKE_FOURCC ('.', 'm', 'p', '3'):
      /* MPEG layer 3, CBR & VBR (QT4.1 and later) */
      return gst_caps_from_string ("audio/mpeg, "
          "layer = (int) 3, " "mpegversion = (int) 1");
    case GST_MAKE_FOURCC ('M', 'A', 'C', '3'):
      /* MACE 3:1 */
      return gst_caps_from_string ("audio/x-mace, " "maceversion = (int) 3");
    case GST_MAKE_FOURCC ('M', 'A', 'C', '6'):
      /* MACE 6:1 */
      return gst_caps_from_string ("audio/x-mace, " "maceversion = (int) 6");
    case GST_MAKE_FOURCC ('O', 'g', 'g', 'V'):
      /* Ogg Vorbis */
      return gst_caps_from_string ("application/ogg");
    case GST_MAKE_FOURCC ('d', 'v', 'c', 'a'):
      /* DV audio */
      return gst_caps_from_string ("audio/x-dv");
    case GST_MAKE_FOURCC ('m', 'p', '4', 'a'):
      /* MPEG-4 AAC */
      return gst_caps_new_simple ("audio/mpeg",
          "mpegversion", G_TYPE_INT, 4, NULL);
    case GST_MAKE_FOURCC ('Q', 'D', 'M', '2'):
      /* FIXME: QDesign music version 2 (no constant) */
      if (data) {
        return gst_caps_new_simple ("audio/x-qdm2",
            "framesize", G_TYPE_INT, QTDEMUX_GUINT32_GET (data + 52),
            "bitrate", G_TYPE_INT, QTDEMUX_GUINT32_GET (data + 40),
            "blocksize", G_TYPE_INT, QTDEMUX_GUINT32_GET (data + 44), NULL);
      } else {
        return gst_caps_new_simple ("audio/x-qdm2", NULL);
      }
    case GST_MAKE_FOURCC ('a', 'g', 's', 'm'):
      /* GSM */
      return gst_caps_new_simple ("audio/x-gsm", NULL);
    case GST_MAKE_FOURCC ('s', 'a', 'm', 'r'):
      /* AMR-NB */
      return gst_caps_new_simple ("audio/x-amr-nb", NULL);
    case GST_MAKE_FOURCC ('i', 'm', 'a', '4'):
      /* IMA 4:1 */
      return gst_caps_new_simple ("audio/x-adpcm",
          "layout", G_TYPE_STRING, "quicktime", NULL);
    case GST_MAKE_FOURCC ('q', 't', 'v', 'r'):
      /* ? */
    case GST_MAKE_FOURCC ('Q', 'D', 'M', 'C'):
      /* QDesign music */
    case GST_MAKE_FOURCC ('Q', 'c', 'l', 'p'):
      /* QUALCOMM PureVoice */
    default:
#if 0
      g_critical ("Don't know how to convert fourcc '" GST_FOURCC_FORMAT
          "' to caps\n", GST_FOURCC_ARGS (fourcc));
      return NULL;
#endif
      {
        char *s;

        s = g_strdup_printf ("audio/x-gst-fourcc-" GST_FOURCC_FORMAT,
            GST_FOURCC_ARGS (fourcc));
        return gst_caps_new_simple (s, NULL);
      }
  }
}