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Solved with omx-gstreamer bug fix: Firewire capture, gstreamer, and omxbufferalloc

David Martin96480
Prodigy 140 points

We're using a custom daughter card with an 8168 to capture DCIM images over 1394b Firewire with gstreamer.  Using the following (simplified) pipepline, I'm getting very low FPS (6 ish) and high CPU utlization (100%) on the default image size (1600x1200):

gst-launch dc1394src ! omx_noisefilter ! omx_h264enc ! gstperf ! filesink

If I remove the omx elements, my framerate hits the target of 15 fps and CPU utliization is minimal.  I'm assuming the problem has to do with image capture on the A8 side using the dcim dc1394 driver and then copying it to the M3 VPSS side for encoding.  Based on other posts (http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/165788.aspx), it looks like the omxbufferalloc element can help with this issue by allocating the image frame in friendly memory space.  If I blindly insert it into my pipeline:

gst-launch dc1394src ! omxbufferalloc ! omx_noisefilter ! omx_h264enc ! gstperf ! filesink

I get debug statements saying the buffers are allocated, but no images are pushed through. 

Judging by the TI Gstreamer subversion logs, the omxbufferalloc element itself is not sufficient, and there were additional adjustments to V4L2src to make this work (addition of gst_v4l2_buffer_new_userspr in gstv4l2bufferpool.c).  Can anyone provide confirmation that similar changes to the dc1394src element *should* be sufficient to take advantage of omxbufferalloc behavior?

 

Any other guidance on using omxbufferalloc for non-V4L2 sources?

 

Thanks,

 

Dave

  • 0
    Prodigy 140 points

    In case someone stumbles on this....

    We did (finally) get this to work.  There were fundamentally two issues for our EZSDK 5.03-based solution.  First, the dc1394src element natively wants to output UYVY colorspace, which doesn't play nicely with the omx_h264enc capture element, which requires NV12.  See this post (http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/p/207818/744082.aspx#744082) for our solution.

    Second, the default allocation scheme for dc1394src uses memory allocation from some general heap, rather than the shared memory heap accessible by the OMX elements.  We modified dc1394src to allocate memory using gst_pad_alloc_buffer_and_set_caps, which when connected to an omx_bufferalloc element, causes the dc1394src element o allocate memory in shared heap 2.  HOWEVER, there was a major bug in gstomxbufferalloc.c which causes a crash after 'n' buffers are allocated.  In gst_omx_buffer_alloc_bufferalloc, the "filter->cnt++" buffer is returned on every call.  Unfortunately, the count 'cnt' is never reset, so the returned buffer is eventually located in unallocated memory space.  Adding a simple reset ("if filter->cnt >= filter->out_port.num_buffers then filter->cnt=0;") solved the issue.  I have no idea why it seems to be used other places without incident. 

    I've attached the update dc1394src.c code that uses the libyuv solution referenced in the other post, along with improved memory allocation in omxbufferalloc.  We can get 1600 x 1200 resolution at 15 fps encoded with about 60% CPU utilization.  Not great, but it's good enough for our purposes.

    Dave

     

    Fullscreen 5078.gstdc1394.c Download 
    /* GStreamer
 * Copyright (C) <2006> Eric Jonas <jonas@mit.edu>
 * Copyright (C) <2006> Antoine Tremblay <hexa00@gmail.com>
 *
 * 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.
 */

/**
 * SECTION:element-dc1394
 *
 * Source for IIDC (Instrumentation & Industrial Digital Camera) firewire
 * cameras.
 * 
 * <refsect2>
 * <title>Example launch line</title>
 * |[
 * gst-launch -v dc1394 camera-number=0 ! xvimagesink
 * ]|
 * </refsect2>
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstdc1394.h"
#include "libyuv/convert.h"
#include <stdlib.h>
#include <sys/time.h>
#include <time.h>
#include <string.h>

#define USE_NV12 /*USE_YUY2_ACCELERATED*/

GST_DEBUG_CATEGORY (dc1394_debug);
#define GST_CAT_DEFAULT dc1394_debug

#ifdef __cplusplus
extern "C" {
#endif

enum
{
  PROP_0,
  PROP_TIMESTAMP_OFFSET,
  PROP_CAMNUM,
  PROP_BUFSIZE,
  PROP_ISO_SPEED
      /* FILL ME */
};


GST_BOILERPLATE (GstDc1394, gst_dc1394, GstPushSrc, GST_TYPE_PUSH_SRC);

static void gst_dc1394_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec);
static void gst_dc1394_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec);

static GstCaps *gst_dc1394_getcaps (GstBaseSrc * bsrc);
static gboolean gst_dc1394_setcaps (GstBaseSrc * bsrc, GstCaps * caps);
static void gst_dc1394_src_fixate (GstPad * pad, GstCaps * caps);

static void gst_dc1394_get_times (GstBaseSrc * basesrc,
    GstBuffer * buffer, GstClockTime * start, GstClockTime * end);

static GstFlowReturn gst_dc1394_create (GstPushSrc * psrc, GstBuffer ** buffer);

static GstStateChangeReturn
gst_dc1394_change_state (GstElement * element, GstStateChange transition);

static gboolean gst_dc1394_parse_caps (const GstCaps * caps,
    gint * width,
    gint * height,
    gint * rate_numerator, gint * rate_denominator, gint * vmode, gint * bpp);

static gint gst_dc1394_caps_set_format_vmode_caps (GstStructure * st,
    gint mode);
static gboolean gst_dc1394_set_caps_color (GstStructure * gs, gint mc);
static void gst_dc1394_set_caps_framesize (GstStructure * gs, gint width,
    gint height);
static void gst_dc1394_set_caps_framesize_range (GstStructure * gs,
    gint minwidth, gint maxwidth, gint incwidth,
    gint minheight, gint maxheight, gint incheight);

static gint gst_dc1394_caps_set_framerate_list (GstStructure * gs,
    dc1394framerates_t * framerates);

static GstCaps *gst_dc1394_get_all_dc1394_caps (void);
static GstCaps *gst_dc1394_get_cam_caps (GstDc1394 * src);
static gboolean gst_dc1394_open_cam_with_best_caps (GstDc1394 * src);
static gint gst_dc1394_framerate_frac_to_const (gint num, gint denom);
static void gst_dc1394_framerate_const_to_frac (gint framerateconst,
    GValue * framefrac);
static gboolean
gst_dc1394_change_camera_transmission (GstDc1394 * src, gboolean on);

static void
gst_dc1394_base_init (gpointer g_class)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

  gst_element_class_set_details_simple (element_class, "1394 IIDC Video Source",
      "Source/Video",
      "libdc1394 based source, supports 1394 IIDC cameras",
      "Antoine Tremblay with Dave edits for YUYV conversion <hexa00@gmail.com>");

  gst_element_class_add_pad_template (element_class,
      gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
          gst_dc1394_get_all_dc1394_caps ()));

}

static void
gst_dc1394_class_init (GstDc1394Class * klass)
{
  GObjectClass *gobject_class;
  GstBaseSrcClass *gstbasesrc_class;
  GstPushSrcClass *gstpushsrc_class;
  GstElementClass *gstelement_class;

  gobject_class = (GObjectClass *) klass;
  gstbasesrc_class = (GstBaseSrcClass *) klass;
  gstpushsrc_class = (GstPushSrcClass *) klass;
  gstelement_class = (GstElementClass *) klass;

  gobject_class->set_property = gst_dc1394_set_property;
  gobject_class->get_property = gst_dc1394_get_property;

  g_object_class_install_property (G_OBJECT_CLASS (klass),
      PROP_TIMESTAMP_OFFSET, g_param_spec_int64 ("timestamp-offset",
          "Timestamp offset",
          "An offset added to timestamps set on buffers (in ns)", G_MININT64,
          G_MAXINT64, 0, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  g_object_class_install_property (G_OBJECT_CLASS (klass),
      PROP_CAMNUM, g_param_spec_int ("camera-number",
          "The number of the camera on the firewire bus",
          "The number of the camera on the firewire bus", 0,
          G_MAXINT, 0, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  g_object_class_install_property (G_OBJECT_CLASS (klass),
      PROP_BUFSIZE, g_param_spec_int ("buffer-size",
          "The number of frames in the dma ringbuffer",
          "The number of frames in the dma ringbuffer", 1,
          G_MAXINT, 10, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  g_object_class_install_property (G_OBJECT_CLASS (klass),
      PROP_ISO_SPEED, g_param_spec_int ("iso-speed",
          "The iso bandwidth in Mbps (100, 200, 400, 800, 1600, 3200)",
          "The iso bandwidth in Mbps (100, 200, 400, 800, 1600, 3200)", 100,
          3200, 400, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  gstbasesrc_class->get_caps = gst_dc1394_getcaps;
  gstbasesrc_class->set_caps = gst_dc1394_setcaps;

  gstbasesrc_class->get_times = gst_dc1394_get_times;
  gstpushsrc_class->create = gst_dc1394_create;

  gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_dc1394_change_state);

}

static void
gst_dc1394_init (GstDc1394 * src, GstDc1394Class * g_class)
{
	int i;

  src->segment_start_frame = -1;
  src->segment_end_frame = -1;
  src->timestamp_offset = 0;
  src->caps = gst_dc1394_get_all_dc1394_caps ();
  src->bufsize = 10;
  src->iso_speed = 400;
  src->camnum = 0;
  src->n_frames = 0;

  gst_pad_set_fixatecaps_function (GST_BASE_SRC_PAD (src),
      gst_dc1394_src_fixate);

  gst_base_src_set_live (GST_BASE_SRC (src), TRUE);

}

static void
gst_dc1394_src_fixate (GstPad * pad, GstCaps * caps)
{

  GstDc1394 *src = GST_DC1394 (gst_pad_get_parent (pad));
  GstStructure *structure;
  int i;

  GST_LOG_OBJECT (src, " fixating caps to closest to 320x240 , 30 fps");

  for (i = 0; i < gst_caps_get_size (caps); ++i) {
    structure = gst_caps_get_structure (caps, i);

    gst_structure_fixate_field_nearest_int (structure, "width", 320);
    gst_structure_fixate_field_nearest_int (structure, "height", 240);
    gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
  }
  gst_object_unref (GST_OBJECT (src));
}

static void
gst_dc1394_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
  GstDc1394 *src = GST_DC1394 (object);

  switch (prop_id) {
    case PROP_TIMESTAMP_OFFSET:
      src->timestamp_offset = g_value_get_int64 (value);
      break;
    case PROP_CAMNUM:
      src->camnum = g_value_get_int (value);
      break;
    case PROP_BUFSIZE:
      src->bufsize = g_value_get_int (value);
      break;
    case PROP_ISO_SPEED:
      switch (g_value_get_int (value)) {
        case 100:
        case 200:
        case 300:
        case 400:
        case 800:
        case 1600:
        case 3200:
          // fallthrough
          src->iso_speed = g_value_get_int (value);
          break;
        default:
          g_warning ("%s: Invalid iso speed %d, ignoring",
              GST_ELEMENT_NAME (src), g_value_get_int (value));
          break;
      }
    default:
      break;
  }
}

static void
gst_dc1394_get_property (GObject * object, guint prop_id, GValue * value,
    GParamSpec * pspec)
{
  GstDc1394 *src = GST_DC1394 (object);

  switch (prop_id) {
    case PROP_TIMESTAMP_OFFSET:
      g_value_set_int64 (value, src->timestamp_offset);
      break;
    case PROP_CAMNUM:
      g_value_set_int (value, src->camnum);
      break;
    case PROP_BUFSIZE:
      g_value_set_int (value, src->bufsize);
      break;
    case PROP_ISO_SPEED:
      g_value_set_int (value, src->iso_speed);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

static GstCaps *
gst_dc1394_getcaps (GstBaseSrc * bsrc)
{
  GstDc1394 *gsrc;

  gsrc = GST_DC1394 (bsrc);

  g_return_val_if_fail (gsrc->caps, NULL);

  return gst_caps_copy (gsrc->caps);
}


static gboolean
gst_dc1394_setcaps (GstBaseSrc * bsrc, GstCaps * caps)
{

  gboolean res = TRUE;
  GstDc1394 *dc1394;
  gint width, height, rate_denominator, rate_numerator;
  gint bpp, vmode;

  dc1394 = GST_DC1394 (bsrc);

  if (dc1394->caps) {
    gst_caps_unref (dc1394->caps);
  }

  dc1394->caps = gst_caps_copy (caps);

  res = gst_dc1394_parse_caps (caps, &width, &height,
      &rate_numerator, &rate_denominator, &vmode, &bpp);

  if (res) {
    /* looks ok here */
    dc1394->width = width;
    dc1394->height = height;
    dc1394->vmode = vmode;
    dc1394->rate_numerator = rate_numerator;
    dc1394->rate_denominator = rate_denominator;
    dc1394->bpp = bpp;
  }

  return res;
}

static void
gst_dc1394_get_times (GstBaseSrc * basesrc, GstBuffer * buffer,
    GstClockTime * start, GstClockTime * end)
{
  /* for live sources, sync on the timestamp of the buffer */
  if (gst_base_src_is_live (basesrc)) {
    GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer);

    if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
      /* get duration to calculate end time */
      GstClockTime duration = GST_BUFFER_DURATION (buffer);

      if (GST_CLOCK_TIME_IS_VALID (duration)) {
        *end = timestamp + duration;
      }
      *start = timestamp;
    }
  } else {
    *start = -1;
    *end = -1;
  }
}

static GstFlowReturn
gst_dc1394_create (GstPushSrc * psrc, GstBuffer ** buffer)
{
  GstDc1394 *src;
  GstPad *srcpad;
  GstBuffer *outbuf;
  GstCaps *caps;
  dc1394video_frame_t *frame[1];
  dc1394video_frame_t *new_frame;
  GstFlowReturn res = GST_FLOW_OK;
  dc1394error_t err;
  int imageSize, ret;

  src = GST_DC1394 (psrc);

  err = dc1394_capture_dequeue (src->camera, DC1394_CAPTURE_POLICY_WAIT, frame);

  if (err != DC1394_SUCCESS) {
    GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
        ("failed to dequeue frame"), ("failed to dequeue frame"));
    goto error;
  }

  // Allocate buffer for copied frame (size depends on output format)
#ifdef USE_NV12
  imageSize = frame[0]->image_bytes * 0.75; // NV12 
#else
  imageSize = frame[0]->image_bytes; // YUY2 or UYVY
#endif
  srcpad = GST_BASE_SRC_PAD(src);
  caps = gst_pad_get_caps (srcpad);
  gst_pad_alloc_buffer_and_set_caps(srcpad, 0, imageSize, caps, &outbuf);
  //printf("Allocated buffer at 0x%x\n", GST_BUFFER_DATA(outbuf));
  
  // Convert to output format
#ifdef USE_YUY2_NATIVE
   dc1394_convert_to_YUV422(frame[0]->image, GST_BUFFER_DATA(outbuf),
							frame[0]->size[0], frame[0]->size[1], 
							DC1394_BYTE_ORDER_YUYV, DC1394_COLOR_CODING_YUV422, 0);
#endif
#ifdef USE_YUY2_ACCELERATED
  ret = libyuv::UYVYToYUY2(frame[0]->image, GST_BUFFER_DATA(outbuf), frame[0]->size[0], frame[0]->size[1], frame[0]->size[0]*2);
  if (ret != 0) printf("Error FROM LIBYUV: %d\n", ret);
#endif
#ifdef USE_NV12
  ret = libyuv::UYVYToNV12(frame[0]->image, frame[0]->size[0]*2,
	                        GST_BUFFER_DATA(outbuf), frame[0]->size[0],
							GST_BUFFER_DATA(outbuf) + frame[0]->size[0]*frame[0]->size[1], frame[0]->size[0],
							frame[0]->size[0], frame[0]->size[1]);
  if (ret != 0) printf("Error FROM UYVYToNV12: %d\n", ret);
#endif
#ifdef USE_UYVY
	memcpy( GST_BUFFER_DATA(outbuf), frame[0]->image, frame[0]->image_bytes);
#endif
	
  GST_BUFFER_TIMESTAMP (outbuf) = src->timestamp_offset + src->running_time;
  if (src->rate_numerator != 0) {
    GST_BUFFER_DURATION (outbuf) = gst_util_uint64_scale_int (GST_SECOND,
        src->rate_denominator, src->rate_numerator);
  }

  src->n_frames++;
  if (src->rate_numerator != 0) {
    src->running_time = gst_util_uint64_scale_int (src->n_frames * GST_SECOND,
        src->rate_denominator, src->rate_numerator);
  }

  if (dc1394_capture_enqueue (src->camera, frame[0]) != DC1394_SUCCESS) {
    GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("failed to enqueue frame"),
        ("failed to enqueue frame"));
    goto error;
  }

  *buffer = outbuf;  
  return res;

error:
  {
    return GST_FLOW_ERROR;
  }
}


static gboolean
gst_dc1394_parse_caps (const GstCaps * caps,
    gint * width,
    gint * height,
    gint * rate_numerator, gint * rate_denominator, gint * vmode, gint * bpp)
{
  const GstStructure *structure;
  gboolean ret;
  const GValue *framerate;

  if (gst_caps_get_size (caps) < 1)
    return FALSE;

  structure = gst_caps_get_structure (caps, 0);

  ret = gst_structure_get_int (structure, "width", width);
  ret &= gst_structure_get_int (structure, "height", height);

  framerate = gst_structure_get_value (structure, "framerate");

  ret &=  gst_structure_get_int (structure, "vmode", vmode);

  ret &= gst_structure_get_int (structure, "bpp", bpp);


  if (framerate) {
    *rate_numerator = gst_value_get_fraction_numerator (framerate);
    *rate_denominator = gst_value_get_fraction_denominator (framerate);
  } else {
    ret = FALSE;
  }

  return ret;
}

static GstStateChangeReturn
gst_dc1394_change_state (GstElement * element, GstStateChange transition)
{
  GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
  GstDc1394 *src = GST_DC1394 (element);

  switch (transition) {
    case GST_STATE_CHANGE_NULL_TO_READY:
      GST_LOG_OBJECT (src, "State change null to ready");
      src->dc1394 = dc1394_new ();
      break;
    case GST_STATE_CHANGE_READY_TO_PAUSED:
      GST_LOG_OBJECT (src, "State ready to paused");

      if (src->caps) {
        gst_caps_unref (src->caps);
        src->caps = NULL;
      }
      src->caps = gst_dc1394_get_cam_caps (src);
      if (src->caps == NULL) {
        GST_LOG_OBJECT (src,
            "Error : Set property  could not get cam caps ! , reverting to default");
        src->caps = gst_dc1394_get_all_dc1394_caps ();
        ret = GST_STATE_CHANGE_FAILURE;
      }

      break;
    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
      GST_LOG_OBJECT (src, "State change paused to playing");

      if (!gst_dc1394_open_cam_with_best_caps (src)) {
        ret = GST_STATE_CHANGE_FAILURE;
      }

      if (src->camera && !gst_dc1394_change_camera_transmission (src, TRUE)) {
        ret = GST_STATE_CHANGE_FAILURE;
      }

      break;
    default:
      break;
  }
  if (ret == GST_STATE_CHANGE_FAILURE)
    return ret;

  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  switch (transition) {
    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
      GST_LOG_OBJECT (src, "State change playing to paused");
      break;
    case GST_STATE_CHANGE_PAUSED_TO_READY:
      GST_LOG_OBJECT (src, "State change paused to ready");

      if (src->camera && !gst_dc1394_change_camera_transmission (src, FALSE)) {

        if (src->camera) {
          dc1394_camera_free (src->camera);
        }
        src->camera = NULL;

        if (src->caps) {
          gst_caps_unref (src->caps);
          src->caps = NULL;
        }

        ret = GST_STATE_CHANGE_FAILURE;
      }

      break;
    case GST_STATE_CHANGE_READY_TO_NULL:
      GST_LOG_OBJECT (src, "State change ready to null");
      if (src->camera) {
        dc1394_camera_free (src->camera);
      }
      src->camera = NULL;

      if (src->dc1394) {
        dc1394_free (src->dc1394);
      }
      src->dc1394 = NULL;

      if (src->caps) {
        gst_caps_unref (src->caps);
        src->caps = NULL;
      }
      break;
    default:
      break;
  }

  return ret;
}


static gint
gst_dc1394_caps_set_format_vmode_caps (GstStructure * gs, gint mode)
{
  gint retval = 0;

  switch (mode) {
    case DC1394_VIDEO_MODE_160x120_YUV444:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_YUV444);
      gst_dc1394_set_caps_framesize (gs, 160, 120);
      break;
    case DC1394_VIDEO_MODE_320x240_YUV422:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_YUV422);
      gst_dc1394_set_caps_framesize (gs, 320, 240);
      break;
    case DC1394_VIDEO_MODE_640x480_YUV411:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_YUV411);
      gst_dc1394_set_caps_framesize (gs, 640, 480);
      break;
    case DC1394_VIDEO_MODE_640x480_YUV422:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_YUV422);
      gst_dc1394_set_caps_framesize (gs, 640, 480);
      break;
    case DC1394_VIDEO_MODE_640x480_RGB8:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_RGB8);
      gst_dc1394_set_caps_framesize (gs, 640, 480);
      break;
    case DC1394_VIDEO_MODE_640x480_MONO8:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_MONO8);
      gst_dc1394_set_caps_framesize (gs, 640, 480);
      break;
    case DC1394_VIDEO_MODE_640x480_MONO16:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_MONO16);
      gst_dc1394_set_caps_framesize (gs, 640, 480);
      break;
    case DC1394_VIDEO_MODE_800x600_YUV422:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_YUV422);
      gst_dc1394_set_caps_framesize (gs, 800, 600);
      break;
    case DC1394_VIDEO_MODE_800x600_RGB8:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_RGB8);
      gst_dc1394_set_caps_framesize (gs, 800, 600);
      break;
    case DC1394_VIDEO_MODE_800x600_MONO8:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_MONO8);
      gst_dc1394_set_caps_framesize (gs, 800, 600);
      break;
    case DC1394_VIDEO_MODE_1024x768_YUV422:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_YUV422);
      gst_dc1394_set_caps_framesize (gs, 1024, 768);
      break;
    case DC1394_VIDEO_MODE_1024x768_RGB8:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_RGB8);
      gst_dc1394_set_caps_framesize (gs, 1024, 768);
      break;
    case DC1394_VIDEO_MODE_1024x768_MONO8:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_MONO8);
      gst_dc1394_set_caps_framesize (gs, 1024, 768);
      break;
    case DC1394_VIDEO_MODE_800x600_MONO16:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_MONO16);
      gst_dc1394_set_caps_framesize (gs, 800, 600);
      break;
    case DC1394_VIDEO_MODE_1024x768_MONO16:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_MONO16);
      gst_dc1394_set_caps_framesize (gs, 1024, 768);
      break;
    case DC1394_VIDEO_MODE_1280x960_YUV422:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_YUV422);
      gst_dc1394_set_caps_framesize (gs, 1280, 960);
      break;
    case DC1394_VIDEO_MODE_1280x960_RGB8:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_RGB8);
      gst_dc1394_set_caps_framesize (gs, 1280, 960);
      break;
    case DC1394_VIDEO_MODE_1280x960_MONO8:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_MONO8);
      gst_dc1394_set_caps_framesize (gs, 1280, 960);
      break;
    case DC1394_VIDEO_MODE_1600x1200_YUV422:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_YUV422);
      gst_dc1394_set_caps_framesize (gs, 1600, 1200);
      break;
    case DC1394_VIDEO_MODE_1600x1200_RGB8:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_RGB8);
      gst_dc1394_set_caps_framesize (gs, 1600, 1200);
      break;
    case DC1394_VIDEO_MODE_1600x1200_MONO8:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_MONO8);
      gst_dc1394_set_caps_framesize (gs, 1600, 1200);
      break;
    case DC1394_VIDEO_MODE_1280x960_MONO16:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_MONO16);
      gst_dc1394_set_caps_framesize (gs, 1280, 960);
      break;
    case DC1394_VIDEO_MODE_1600x1200_MONO16:
      gst_dc1394_set_caps_color (gs, DC1394_COLOR_CODING_MONO8);
      gst_dc1394_set_caps_framesize (gs, 1600, 1200);
      break;

    default:
      retval = -1;
  }

  return retval;

}


static gboolean
gst_dc1394_set_caps_color (GstStructure * gs, gint mc)
{
  gboolean ret = TRUE;
  gint fourcc;

  switch (mc) {
    case DC1394_COLOR_CODING_YUV444:
      gst_structure_set_name (gs, "video/x-raw-yuv");

      fourcc = GST_MAKE_FOURCC ('I', 'Y', 'U', '2');
      gst_structure_set (gs,
          "format", GST_TYPE_FOURCC, fourcc, "bpp", G_TYPE_INT, 16, NULL);
      break;

    case DC1394_COLOR_CODING_YUV422:
      gst_structure_set_name (gs, "video/x-raw-yuv");
#ifdef USE_NV12
	  fourcc = GST_MAKE_FOURCC ('N', 'V', '1', '2');
#endif
#ifdef USE_UYVY
      fourcc = GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y');
#endif
#if defined(USE_YUY2_NATIVE) || defined(USE_YUY2_ACCELERATED)
	  fourcc = GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
#endif
      gst_structure_set (gs,
          "format", GST_TYPE_FOURCC, fourcc, "bpp", G_TYPE_INT, 16, NULL);
      break;

    case DC1394_COLOR_CODING_YUV411:
      gst_structure_set_name (gs, "video/x-raw-yuv");
      fourcc = GST_MAKE_FOURCC ('I', 'Y', 'U', '1');
      gst_structure_set (gs,
          "format", GST_TYPE_FOURCC, fourcc, "bpp", G_TYPE_INT, 12, NULL);
      break;
    case DC1394_COLOR_CODING_RGB8:
      gst_structure_set_name (gs, "video/x-raw-rgb");
      gst_structure_set (gs,
          "bpp", G_TYPE_INT, 24,
          "depth", G_TYPE_INT, 24,
          "endianness", G_TYPE_INT, G_BIG_ENDIAN,
          "red_mask", G_TYPE_INT, 0xFF0000,
          "green_mask", G_TYPE_INT, 0x00FF00,
          "blue_mask", G_TYPE_INT, 0x0000FF, NULL);
      break;
    case DC1394_COLOR_CODING_MONO8:
      gst_structure_set_name (gs, "video/x-raw-gray");
      gst_structure_set (gs,
          "bpp", G_TYPE_INT, 8, "depth", G_TYPE_INT, 8, NULL);

      break;
    case DC1394_COLOR_CODING_MONO16:
      gst_structure_set_name (gs, "video/x-raw-gray");
      gst_structure_set (gs,
          "bpp", G_TYPE_INT, 16, "depth", G_TYPE_INT, 16, NULL);
      // there is no fourcc for this format
      break;
    default:
      GST_DEBUG ("Ignoring unsupported color format %d", mc);
      ret = FALSE;
      break;
  }
  return ret;
}


static void
gst_dc1394_set_caps_framesize (GstStructure * gs, gint width, gint height)
{
  gst_structure_set (gs,
      "width", G_TYPE_INT, width, "height", G_TYPE_INT, height, NULL);
}

static void
gst_dc1394_set_caps_framesize_range (GstStructure * gs,
    gint minwidth,
    gint maxwidth,
    gint incwidth, gint minheight, gint maxheight, gint incheight)
{
  /* 
     Format 7 cameras allow you to change the camera width/height in multiples
     of incwidth/incheight up to some max. This sets the necessary
     list structure in the gst caps structure
   */

  GValue widthlist = { 0 };
  GValue widthval = { 0 };
  GValue heightlist = { 0 };
  GValue heightval = { 0 };
  gint x = 0;

  g_value_init (&widthlist, GST_TYPE_LIST);
  g_value_init (&widthval, G_TYPE_INT);
  for (x = minwidth; x <= maxwidth; x += incwidth) {
    g_value_set_int (&widthval, x);
    gst_value_list_append_value (&widthlist, &widthval);
  }
  gst_structure_set_value (gs, "width", &widthlist);

  g_value_unset (&widthlist);
  g_value_unset (&widthval);

  g_value_init (&heightlist, GST_TYPE_LIST);
  g_value_init (&heightval, G_TYPE_INT);
  for (x = minheight; x <= maxheight; x += incheight) {
    g_value_set_int (&heightval, x);
    gst_value_list_append_value (&heightlist, &heightval);
  }

  gst_structure_set_value (gs, "height", &heightlist);

  g_value_unset (&heightlist);
  g_value_unset (&heightval);
}


static gint
gst_dc1394_caps_set_framerate_list (GstStructure * gs,
    dc1394framerates_t * framerates)
{
  GValue framefrac = { 0 };
  GValue frameratelist = { 0 };
  gint f;

  g_value_init (&frameratelist, GST_TYPE_LIST);
  g_value_init (&framefrac, GST_TYPE_FRACTION);

  // figure out the frame rate
  for (f = framerates->num - 1; f >= 0; f--) {
    /* reverse order so we place the faster frame rates higher in 
       the sequence */
    if (framerates->framerates[f]) {
      gst_dc1394_framerate_const_to_frac (framerates->framerates[f],
          &framefrac);

      gst_value_list_append_value (&frameratelist, &framefrac);
    }
  }
  gst_structure_set_value (gs, "framerate", &frameratelist);

  g_value_unset (&framefrac);
  g_value_unset (&frameratelist);
  return 0;
}



static void
gst_dc1394_framerate_const_to_frac (gint framerateconst, GValue * framefrac)
{

  // frac must have been already initialized

  switch (framerateconst) {
    case DC1394_FRAMERATE_1_875:
      gst_value_set_fraction (framefrac, 15, 8);
      break;
    case DC1394_FRAMERATE_3_75:
      gst_value_set_fraction (framefrac, 15, 4);
      break;
    case DC1394_FRAMERATE_7_5:
      gst_value_set_fraction (framefrac, 15, 2);
      break;
    case DC1394_FRAMERATE_15:
      gst_value_set_fraction (framefrac, 15, 1);
      break;
    case DC1394_FRAMERATE_30:
      gst_value_set_fraction (framefrac, 30, 1);
      break;
    case DC1394_FRAMERATE_60:
      gst_value_set_fraction (framefrac, 60, 1);
      break;
    case DC1394_FRAMERATE_120:
      gst_value_set_fraction (framefrac, 120, 1);
      break;
    case DC1394_FRAMERATE_240:
      gst_value_set_fraction (framefrac, 240, 1);
      break;
  }
}

static GstCaps *
gst_dc1394_get_all_dc1394_caps (void)
{
  /* 
     generate all possible caps

   */

  GstCaps *gcaps;
  gint i = 0;

  gcaps = gst_caps_new_empty ();
  // first, the fixed mode caps
  for (i = DC1394_VIDEO_MODE_MIN; i < DC1394_VIDEO_MODE_EXIF; i++) {
    GstStructure *gs = gst_structure_empty_new ("video");
    gint ret = gst_dc1394_caps_set_format_vmode_caps (gs, i);

    gst_structure_set (gs,
        "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
    gst_structure_set (gs, "vmode", G_TYPE_INT, i, NULL);
    if (ret >= 0) {
      gst_caps_append_structure (gcaps, gs);
    }
  }

  // then Format 7 options

  for (i = DC1394_COLOR_CODING_MIN; i <= DC1394_COLOR_CODING_MAX; i++) {
    GstStructure *gs = gst_structure_empty_new ("video");

    //int ret =  gst_dc1394_caps_set_format_vmode_caps(gs, i); 

    gst_structure_set (gs, "vmode", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);

    gst_structure_set (gs,
        "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
    gst_structure_set (gs,
        "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
        "height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);

    if (gst_dc1394_set_caps_color (gs, i)) {
      gst_caps_append_structure (gcaps, gs);
    }
  }
  return gcaps;

}

GstCaps *
gst_dc1394_get_cam_caps (GstDc1394 * src)
{

  dc1394camera_t *camera = NULL;
  dc1394camera_list_t *cameras = NULL;
  dc1394error_t camerr;
  gint i, j;
  dc1394video_modes_t modes;
  dc1394framerates_t framerates;
  GstCaps *gcaps = NULL;

  gcaps = gst_caps_new_empty ();

  camerr = dc1394_camera_enumerate (src->dc1394, &cameras);

  if (camerr != DC1394_SUCCESS || cameras == NULL) {
    GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND,
        ("Can't find cameras error : %d", camerr),
        ("Can't find cameras error : %d", camerr));
    goto error;
  }

  if (cameras->num == 0) {
    GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, ("There were no cameras"),
        ("There were no cameras"));
    goto error;
  }

  if (src->camnum > (cameras->num - 1)) {
    GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Invalid camera number"),
        ("Invalid camera number %d", src->camnum));
    goto error;
  }

  camera =
      dc1394_camera_new_unit (src->dc1394, cameras->ids[src->camnum].guid,
      cameras->ids[src->camnum].unit);

  dc1394_camera_free_list (cameras);
  cameras = NULL;

  camerr = dc1394_video_get_supported_modes (camera, &modes);
  if (camerr != DC1394_SUCCESS) {
    GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Error getting supported modes"),
        ("Error getting supported modes"));
    goto error;
  }

  for (i = modes.num - 1; i >= 0; i--) {
    int m = modes.modes[i];

    if (m < DC1394_VIDEO_MODE_EXIF) {

      GstStructure *gs = gst_structure_empty_new ("video");

      gst_structure_set (gs, "vmode", G_TYPE_INT, m, NULL);

      if (gst_dc1394_caps_set_format_vmode_caps (gs, m) < 0) {
        GST_ELEMENT_ERROR (src, STREAM, FAILED,
            ("attempt to set mode to %d failed", m),
            ("attempt to set mode to %d failed", m));
        goto error;
      } else {

        camerr = dc1394_video_get_supported_framerates (camera, (dc1394video_mode_t) m, &framerates);
        gst_dc1394_caps_set_framerate_list (gs, &framerates);
        gst_caps_append_structure (gcaps, gs);

      }
    } else {
      // FORMAT 7
      guint maxx, maxy;
      GstStructure *gs = gst_structure_empty_new ("video");
      dc1394color_codings_t colormodes;
      guint xunit, yunit;

      gst_structure_set (gs, "vmode", G_TYPE_INT, m, NULL);

      // Get the maximum frame size
      camerr = dc1394_format7_get_max_image_size (camera, (dc1394video_mode_t) m, &maxx, &maxy);
      if (camerr != DC1394_SUCCESS) {
        GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
            ("Error getting format 7 max image size"),
            ("Error getting format 7 max image size"));
        goto error;
      }
      GST_LOG_OBJECT (src, "Format 7 maxx=%d maxy=%d", maxx, maxy);

      camerr = dc1394_format7_get_unit_size (camera, (dc1394video_mode_t) m, &xunit, &yunit);
      if (camerr != DC1394_SUCCESS) {
        GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
            ("Error getting format 7 image unit size"),
            ("Error getting format 7 image unit size"));
        goto error;
      }
      GST_LOG_OBJECT (src, "Format 7 unitx=%d unity=%d", xunit, yunit);

      gst_dc1394_set_caps_framesize_range (gs, xunit, maxx, xunit,
          yunit, maxy, yunit);

      // note that format 7 has no concept of a framerate, so we pass the 
      // full range
      gst_structure_set (gs,
          "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);

      // get the available color codings
      camerr = dc1394_format7_get_color_codings (camera, (dc1394video_mode_t) m, &colormodes);
      if (camerr != DC1394_SUCCESS) {
        GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
            ("Error getting format 7 color modes"),
            ("Error getting format 7 color modes"));
        goto error;
      }

      for (j = 0; j < colormodes.num; j++) {
        GstStructure *newgs = gst_structure_copy (gs);

        gst_dc1394_set_caps_color (newgs, colormodes.codings[j]);
        GST_LOG_OBJECT (src, "Format 7 colormode set : %d",
            colormodes.codings[j]);
        // note that since there are multiple color modes, we append
        // multiple structures.
        gst_caps_append_structure (gcaps, newgs);
      }
    }
  }

  if (camera) {
    dc1394_camera_free (camera);
  }

  return gcaps;

error:

  if (gcaps) {
    gst_caps_unref (gcaps);
  }

  if (cameras) {
    dc1394_camera_free_list (cameras);
    cameras = NULL;
  }

  if (camera) {
    dc1394_camera_free (camera);
    camera = NULL;
  }

  return NULL;
}

static gint
gst_dc1394_framerate_frac_to_const (gint num, gint denom)
{
  // frac must have been already initialized
  int retvalue = -1;

  if (num == 15 && denom == 8)
    retvalue = DC1394_FRAMERATE_1_875;

  if (num == 15 && denom == 4)
    retvalue = DC1394_FRAMERATE_3_75;

  if (num == 15 && denom == 2)
    retvalue = DC1394_FRAMERATE_7_5;

  if (num == 15 && denom == 1)
    retvalue = DC1394_FRAMERATE_15;


  if (num == 30 && denom == 1)
    retvalue = DC1394_FRAMERATE_30;

  if (num == 60 && denom == 1)
    retvalue = DC1394_FRAMERATE_60;

  return retvalue;
}


static gboolean
gst_dc1394_open_cam_with_best_caps (GstDc1394 * src)
{
  dc1394camera_list_t *cameras = NULL;
  gint err = 0;
  int framerateconst;

  GST_LOG_OBJECT (src, "Opening the camera!!!");


  if (dc1394_camera_enumerate (src->dc1394, &cameras) != DC1394_SUCCESS) {
    GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Can't find cameras"),
        ("Can't find cameras"));
    goto error;
  }

  GST_LOG_OBJECT (src, "Found  %d  cameras", cameras->num);

  if (src->camnum > (cameras->num - 1)) {
    GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Invalid camera number"),
        ("Invalid camera number"));
    goto error;
  }

  GST_LOG_OBJECT (src, "Opening camera : %d", src->camnum);

  src->camera =
      dc1394_camera_new_unit (src->dc1394, cameras->ids[src->camnum].guid,
      cameras->ids[src->camnum].unit);

  dc1394_camera_free_list (cameras);
  cameras = NULL;

  // figure out mode
  framerateconst = gst_dc1394_framerate_frac_to_const (src->rate_numerator,
      src->rate_denominator);

  GST_LOG_OBJECT (src, "The dma buffer queue size is %d  buffers",
      src->bufsize);

  switch (src->iso_speed) {
    case 100:
      err = dc1394_video_set_iso_speed (src->camera, DC1394_ISO_SPEED_100);
      break;
    case 200:
      err = dc1394_video_set_iso_speed (src->camera, DC1394_ISO_SPEED_200);
      break;
    case 400:
      err = dc1394_video_set_iso_speed (src->camera, DC1394_ISO_SPEED_400);
      break;
    case 800:
      if (src->camera->bmode_capable > 0) {
        dc1394_video_set_operation_mode (src->camera,
            DC1394_OPERATION_MODE_1394B);
        err = dc1394_video_set_iso_speed (src->camera, DC1394_ISO_SPEED_800);
      }
      break;
    case 1600:
      if (src->camera->bmode_capable > 0) {
        dc1394_video_set_operation_mode (src->camera,
            DC1394_OPERATION_MODE_1394B);
        err = dc1394_video_set_iso_speed (src->camera, DC1394_ISO_SPEED_1600);
      }
      break;
    case 3200:
      if (src->camera->bmode_capable > 0) {
        dc1394_video_set_operation_mode (src->camera,
            DC1394_OPERATION_MODE_1394B);
        err = dc1394_video_set_iso_speed (src->camera, DC1394_ISO_SPEED_3200);
      }
      break;
    default:
      GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Invalid ISO speed"),
          ("Invalid ISO speed"));
      goto error;
      break;
  }

  if (err != DC1394_SUCCESS) {
    GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Could not set ISO speed"),
        ("Could not set ISO speed"));
    goto error;
  }

  GST_LOG_OBJECT (src, "Setting mode :  %d", src->vmode);
  err = dc1394_video_set_mode (src->camera, (dc1394video_mode_t) src->vmode);

  if (err != DC1394_SUCCESS) {
    GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Could not set video mode %d",
            src->vmode), ("Could not set video mode %d", src->vmode));
    goto error;
  }

  GST_LOG_OBJECT (src, "Setting framerate :  %d", framerateconst);
  dc1394_video_set_framerate (src->camera, (dc1394framerate_t) framerateconst);

  if (err != DC1394_SUCCESS) {
    GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Could not set framerate to %d",
            framerateconst), ("Could not set framerate to %d", framerateconst));
    goto error;
  }
  // set any format-7 parameters if this is a format-7 mode
  if (src->vmode >= DC1394_VIDEO_MODE_FORMAT7_MIN &&
      src->vmode <= DC1394_VIDEO_MODE_FORMAT7_MAX) {
    // the big thing we care about right now is frame size
    err = dc1394_format7_set_image_size (src->camera, (dc1394video_mode_t) src->vmode,
        src->width, src->height);
    if (err != DC1394_SUCCESS) {
      GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
          ("Could not set format 7 image size to %d x %d", src->width,
              src->height), ("Could not set format 7 image size to %d x %d",
              src->width, src->height));

      goto error;
    }

  }
  err = dc1394_capture_setup (src->camera, src->bufsize,
      DC1394_CAPTURE_FLAGS_DEFAULT);
  if (err != DC1394_SUCCESS) {
    GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Error setting capture mode"),
        ("Error setting capture mode"));
  }
  if (err != DC1394_SUCCESS) {
    if (err == DC1394_NO_BANDWIDTH) {
      GST_LOG_OBJECT (src, "Capture setup_dma failed."
          "Trying to cleanup the iso_channels_and_bandwidth and retrying");

      // try to cleanup the bandwidth and retry 
      err = dc1394_iso_release_all (src->camera);
      if (err != DC1394_SUCCESS) {
        GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
            ("Could not cleanup bandwidth"), ("Could not cleanup bandwidth"));
        goto error;
      } else {
        err =
            dc1394_capture_setup (src->camera, src->bufsize,
            DC1394_CAPTURE_FLAGS_DEFAULT);
        if (err != DC1394_SUCCESS) {
          GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
              ("unable to setup camera error %d", err),
              ("unable to setup camera error %d", err));
          goto error;
        }
      }
    } else {
      GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
          ("unable to setup camera error %d", err),
          ("unable to setup camera error %d", err));
      goto error;

    }
  }


  return TRUE;

error:

  if (src->camera) {
    dc1394_camera_free (src->camera);
    src->camera = NULL;
  }

  return FALSE;;

}


gboolean
gst_dc1394_change_camera_transmission (GstDc1394 * src, gboolean on)
{
  dc1394switch_t status = DC1394_OFF;
  dc1394error_t err = DC1394_FAILURE;
  gint i = 0;

  g_return_val_if_fail (src->camera, FALSE);

  if (on) {

    status = (dc1394switch_t) dc1394_video_set_transmission (src->camera, DC1394_ON);

    i = 0;
    while (status == DC1394_OFF && i++ < 5) {
      g_usleep (50000);
      if (dc1394_video_get_transmission (src->camera,
              &status) != DC1394_SUCCESS) {
        if (status == DC1394_OFF) {
          GST_LOG_OBJECT (src, "camera is still off , retrying");
        }
      }
    }

    if (i == 5) {
      GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
          ("Camera doesn't seem to want to turn on!"),
          ("Camera doesn't seem to want to turn on!"));
      return FALSE;
    }

    GST_LOG_OBJECT (src, "got transmision status ON");

  } else {

    if (dc1394_video_set_transmission (src->camera,
            DC1394_OFF) != DC1394_SUCCESS) {
      GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Unable to stop transmision"),
          ("Unable to stop transmision"));
      return FALSE;
    }

    GST_LOG_OBJECT (src, "Stopping capture");

    err = dc1394_capture_stop (src->camera);
    if (err > 0) {
      GST_ELEMENT_ERROR (src, RESOURCE, FAILED, ("Capture stop error : %d ",
              err), ("Capture stop error : %d ", err));
      return FALSE;
    } else {
      GST_LOG_OBJECT (src, "Capture stoped successfully");
    }
  }

  return TRUE;
}


static gboolean
plugin_init (GstPlugin * plugin)
{
  GST_DEBUG_CATEGORY_INIT (dc1394_debug, "dc1394", 0, "DC1394 interface");

  return gst_element_register (plugin, "dc1394src", GST_RANK_NONE,
      GST_TYPE_DC1394);

}


GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
    GST_VERSION_MINOR,
    "dc1394",
    "1394 IIDC Video Source",
    plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)



#ifdef __cplusplus
} // extern "C"
#endif