C++ (Cpp) gst_vtutil_dict_set_boolean示例

示例#1

文件： vtdec.c 项目： cbetz421/gst-plugins-bad

static CMFormatDescriptionRef
gst_vtdec_create_format_description_from_codec_data (GstVTDec * self,
    GstBuffer * codec_data)
{
  CMFormatDescriptionRef fmt_desc;
  CFMutableDictionaryRef extensions, par, atoms;
  GstMapInfo map;
  OSStatus status;

  gst_buffer_map (codec_data, &map, GST_MAP_READ);

  /* CVPixelAspectRatio dict */
  par = CFDictionaryCreateMutable (NULL, 0, &kCFTypeDictionaryKeyCallBacks,
      &kCFTypeDictionaryValueCallBacks);
  gst_vtutil_dict_set_i32 (par, CFSTR ("HorizontalSpacing"),
      self->vinfo.par_n);
  gst_vtutil_dict_set_i32 (par, CFSTR ("VerticalSpacing"),
      self->vinfo.par_d);

  /* SampleDescriptionExtensionAtoms dict */
  atoms = CFDictionaryCreateMutable (NULL, 0, &kCFTypeDictionaryKeyCallBacks,
      &kCFTypeDictionaryValueCallBacks);
  gst_vtutil_dict_set_data (atoms, CFSTR ("avcC"), map.data, map.size);

  /* Extensions dict */
  extensions = CFDictionaryCreateMutable (NULL, 0, &kCFTypeDictionaryKeyCallBacks,
      &kCFTypeDictionaryValueCallBacks);
  gst_vtutil_dict_set_string (extensions,
      CFSTR ("CVImageBufferChromaLocationBottomField"), "left");
  gst_vtutil_dict_set_string (extensions,
      CFSTR ("CVImageBufferChromaLocationTopField"), "left");
  gst_vtutil_dict_set_boolean (extensions, CFSTR("FullRangeVideo"), FALSE);
  gst_vtutil_dict_set_object (extensions, CFSTR ("CVPixelAspectRatio"),
      (CFTypeRef *) par);
  gst_vtutil_dict_set_object (extensions,
      CFSTR ("SampleDescriptionExtensionAtoms"), (CFTypeRef *) atoms);

  status = CMVideoFormatDescriptionCreate (NULL,
      self->details->format_id, self->vinfo.width, self->vinfo.height,
      extensions, &fmt_desc);

  gst_buffer_unmap (codec_data, &map);

  if (status == noErr)
    return fmt_desc;
  else
    return NULL;
}

示例#2

文件： vtdec.c 项目： luisbg/gst-plugins-bad

static OSStatus
gst_vtdec_create_session (GstVtdec * vtdec, GstVideoFormat format,
    gboolean enable_hardware)
{
  CFMutableDictionaryRef output_image_buffer_attrs;
  VTDecompressionOutputCallbackRecord callback;
  CFMutableDictionaryRef videoDecoderSpecification;
  OSStatus status;
  guint32 cv_format = 0;

  g_return_val_if_fail (vtdec->session == NULL, FALSE);

  switch (format) {
    case GST_VIDEO_FORMAT_NV12:
      cv_format = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
      break;
    case GST_VIDEO_FORMAT_UYVY:
      cv_format = kCVPixelFormatType_422YpCbCr8;
      break;
    case GST_VIDEO_FORMAT_RGBA:
      cv_format = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
      break;
    default:
      g_warn_if_reached ();
      break;
  }

  videoDecoderSpecification =
      CFDictionaryCreateMutable (NULL, 0, &kCFTypeDictionaryKeyCallBacks,
      &kCFTypeDictionaryValueCallBacks);

  /* This is the default on iOS and the key does not exist there */
#ifndef HAVE_IOS
  gst_vtutil_dict_set_boolean (videoDecoderSpecification,
      kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder,
      enable_hardware);
  if (enable_hardware && vtdec->require_hardware)
    gst_vtutil_dict_set_boolean (videoDecoderSpecification,
        kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder,
        TRUE);
#endif

  output_image_buffer_attrs =
      CFDictionaryCreateMutable (NULL, 0, &kCFTypeDictionaryKeyCallBacks,
      &kCFTypeDictionaryValueCallBacks);
  gst_vtutil_dict_set_i32 (output_image_buffer_attrs,
      kCVPixelBufferPixelFormatTypeKey, cv_format);
  gst_vtutil_dict_set_i32 (output_image_buffer_attrs, kCVPixelBufferWidthKey,
      vtdec->video_info.width);
  gst_vtutil_dict_set_i32 (output_image_buffer_attrs, kCVPixelBufferHeightKey,
      vtdec->video_info.height);

  callback.decompressionOutputCallback = gst_vtdec_session_output_callback;
  callback.decompressionOutputRefCon = vtdec;

  status = VTDecompressionSessionCreate (NULL, vtdec->format_description,
      videoDecoderSpecification, output_image_buffer_attrs, &callback,
      &vtdec->session);

  CFRelease (output_image_buffer_attrs);

  return status;
}