Esempi in C++ (Cpp) per gst_core_media_buffer_new_from_buffer

Esempio n. 1

GstBuffer *
gst_core_media_buffer_new (CMSampleBufferRef sample_buf,
    gboolean use_video_meta, GstVideoTextureCache * cache)
{
  CVImageBufferRef image_buf;
  CMBlockBufferRef block_buf;
  GstBuffer *buf;

  image_buf = CMSampleBufferGetImageBuffer (sample_buf);
  block_buf = CMSampleBufferGetDataBuffer (sample_buf);

  buf = gst_buffer_new ();

  gst_core_media_meta_add (buf, sample_buf, image_buf, block_buf);

  if (image_buf != NULL && CFGetTypeID (image_buf) == CVPixelBufferGetTypeID ()
      && cache) {
    GstVideoInfo info;
    gboolean has_padding = FALSE;
    CVPixelBufferRef pixel_buf = (CVPixelBufferRef) image_buf;

    if (!gst_video_info_init_from_pixel_buffer (&info, pixel_buf)) {
      goto error;
    }

    gst_core_video_wrap_pixel_buffer (buf, &info, pixel_buf, cache,
        &has_padding);

    /* If the video meta API is not supported, remove padding by
     * copying the core media buffer to a system memory buffer */
    if (has_padding && !use_video_meta) {
      GstBuffer *copy_buf;
      copy_buf = gst_core_media_buffer_new_from_buffer (buf, &info);
      if (!copy_buf) {
        goto error;
      }

      gst_buffer_unref (buf);
      buf = copy_buf;
    }

  } else if (block_buf != NULL) {
    if (!gst_core_media_buffer_wrap_block_buffer (buf, block_buf)) {
      goto error;
    }
  } else {
    goto error;
  }

  return buf;

error:
  if (buf) {
    gst_buffer_unref (buf);
  }
  return NULL;
}

Esempio n. 2

File: coremediabuffer.c Progetto: ego5710/gst-plugins-bad

GstBuffer *
gst_core_media_buffer_new (CMSampleBufferRef sample_buf,
    gboolean use_video_meta, gboolean map)
{
  CVImageBufferRef image_buf;
  CMBlockBufferRef block_buf;
  GstCoreMediaMeta *meta;
  GstBuffer *buf;

  image_buf = CMSampleBufferGetImageBuffer (sample_buf);
  block_buf = CMSampleBufferGetDataBuffer (sample_buf);

  buf = gst_buffer_new ();

  meta = (GstCoreMediaMeta *) gst_buffer_add_meta (buf,
      gst_core_media_meta_get_info (), NULL);
  CFRetain (sample_buf);
  if (image_buf)
    CVBufferRetain (image_buf);
  if (block_buf)
    CFRetain (block_buf);
  meta->sample_buf = sample_buf;
  meta->image_buf = image_buf;
  meta->pixel_buf = NULL;
  meta->block_buf = block_buf;

  if (image_buf != NULL && CFGetTypeID (image_buf) == CVPixelBufferGetTypeID ()) {
    GstVideoInfo info;
    gboolean has_padding = FALSE;

    meta->pixel_buf = (CVPixelBufferRef) image_buf;
    if (!gst_video_info_init_from_pixel_buffer (&info, meta->pixel_buf)) {
      goto error;
    }

    if (!gst_core_media_buffer_wrap_pixel_buffer (buf, &info, meta->pixel_buf,
            &has_padding, map)) {
      goto error;
    }

    /* If the video meta API is not supported, remove padding by
     * copying the core media buffer to a system memory buffer */
    if (map && has_padding && !use_video_meta) {
      GstBuffer *copy_buf;
      copy_buf = gst_core_media_buffer_new_from_buffer (buf, &info);
      if (!copy_buf) {
        goto error;
      }

      gst_buffer_unref (buf);
      buf = copy_buf;
    }

  } else if (block_buf != NULL) {
    if (map && !gst_core_media_buffer_wrap_block_buffer (buf, block_buf)) {
      goto error;
    }
  } else {
    goto error;
  }

  return buf;

error:
  if (buf) {
    gst_buffer_unref (buf);
  }
  return NULL;
}