Exemplos de gst_core_video_meta_get_info em C++ (Cpp)

Exemplo n.º 1

Arquivo: corevideobuffer.c Projeto: tombaksolar/gst-plugins-bad

GstBuffer *
gst_core_video_buffer_new (CVBufferRef cvbuf, GstVideoInfo * vinfo)
{
  CVPixelBufferRef pixbuf = NULL;
  GstBuffer *buf;
  GstCoreVideoMeta *meta;
  guint n_planes;
  gsize offset[GST_VIDEO_MAX_PLANES];
  gint stride[GST_VIDEO_MAX_PLANES];

  if (CFGetTypeID (cvbuf) != CVPixelBufferGetTypeID ())
    /* TODO: Do we need to handle other buffer types? */
    goto error;

  pixbuf = (CVPixelBufferRef) cvbuf;

  if (CVPixelBufferLockBaseAddress (pixbuf,
          kCVPixelBufferLock_ReadOnly) != kCVReturnSuccess) {
    goto error;
  }

  buf = gst_buffer_new ();

  /* add the corevideo meta to free the underlying corevideo buffer */
  meta = (GstCoreVideoMeta *) gst_buffer_add_meta (buf,
      gst_core_video_meta_get_info (), NULL);
  meta->cvbuf = CVBufferRetain (cvbuf);
  meta->pixbuf = pixbuf;

  /* set stride, offset and size */
  memset (&offset, 0, sizeof (offset));
  memset (&stride, 0, sizeof (stride));

  if (CVPixelBufferIsPlanar (pixbuf)) {
    int i, size, off;

    n_planes = CVPixelBufferGetPlaneCount (pixbuf);
    off = 0;
    for (i = 0; i < n_planes; ++i) {
      stride[i] = CVPixelBufferGetBytesPerRowOfPlane (pixbuf, i);
      size = stride[i] * CVPixelBufferGetHeightOfPlane (pixbuf, i);
      offset[i] = off;
      off += size;

      gst_buffer_append_memory (buf,
          gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE,
              CVPixelBufferGetBaseAddressOfPlane (pixbuf, i), size, 0, size,
              NULL, NULL));
    }
  } else {
    int size;

    n_planes = 1;
    stride[0] = CVPixelBufferGetBytesPerRow (pixbuf);
    offset[0] = 0;
    size = stride[0] * vinfo->height;

    gst_buffer_append_memory (buf,
        gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE,
            CVPixelBufferGetBaseAddress (pixbuf), size, 0, size, NULL, NULL));
  }

  if (vinfo) {
    GstVideoMeta *video_meta;

    video_meta =
        gst_buffer_add_video_meta_full (buf, GST_VIDEO_FRAME_FLAG_NONE,
        vinfo->finfo->format, vinfo->width, vinfo->height,
        n_planes, offset, stride);
  }

  return buf;

error:
  return NULL;
}

Exemplo n.º 2

Arquivo: corevideobuffer.c Projeto: lubing521/gst-embedded-builder

GstBuffer *
gst_core_video_buffer_new (GstCoreMediaCtx * ctx, CVBufferRef cvbuf,
    GstVideoInfo * vinfo)
{
  GstCVApi *cv = ctx->cv;
  void *data;
  size_t size;
  CVPixelBufferRef pixbuf = NULL;
  GstBuffer *buf;
  GstCoreVideoMeta *meta;
  guint width, height, n_planes, i;
  gsize offset[GST_VIDEO_MAX_PLANES];
  gint stride[GST_VIDEO_MAX_PLANES];

  if (CFGetTypeID (cvbuf) != cv->CVPixelBufferGetTypeID ())
    /* TODO: Do we need to handle other buffer types? */
    goto error;

  pixbuf = (CVPixelBufferRef) cvbuf;

  if (cv->CVPixelBufferLockBaseAddress (pixbuf,
          kCVPixelBufferLock_ReadOnly) != kCVReturnSuccess) {
    goto error;
  }

  buf = gst_buffer_new ();

  /* add the corevideo meta to free the underlying corevideo buffer */
  meta = (GstCoreVideoMeta *) gst_buffer_add_meta (buf,
      gst_core_video_meta_get_info (), NULL);
  meta->ctx = g_object_ref (ctx);
  meta->cvbuf = cv->CVBufferRetain (cvbuf);
  meta->pixbuf = pixbuf;

  /* set stride, offset and size */
  memset (&offset, 0, sizeof (offset));
  memset (&stride, 0, sizeof (stride));

  data = cv->CVPixelBufferGetBaseAddress (pixbuf);
  height = cv->CVPixelBufferGetHeight (pixbuf);
  if (cv->CVPixelBufferIsPlanar (pixbuf)) {
    GstVideoInfo tmp_vinfo;

    n_planes = cv->CVPixelBufferGetPlaneCount (pixbuf);
    for (i = 0; i < n_planes; ++i)
      stride[i] = cv->CVPixelBufferGetBytesPerRowOfPlane (pixbuf, i);

    /* FIXME: don't hardcode NV12 */
    gst_video_info_init (&tmp_vinfo);
    gst_video_info_set_format (&tmp_vinfo,
        GST_VIDEO_FORMAT_NV12, stride[0], height);
    offset[1] = tmp_vinfo.offset[1];
    size = tmp_vinfo.size;
  } else {
    n_planes = 1;
    size = cv->CVPixelBufferGetBytesPerRow (pixbuf) * height;
  }

  gst_buffer_append_memory (buf,
      gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE, data,
          size, 0, size, NULL, NULL));

  if (vinfo) {
    GstVideoMeta *video_meta;

    width = vinfo->width;
    video_meta =
        gst_buffer_add_video_meta_full (buf, GST_VIDEO_FRAME_FLAG_NONE,
        GST_VIDEO_FORMAT_NV12, width, height, n_planes, offset, stride);
  }

  return buf;

error:
  return NULL;
}