1/*
2 *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 *
10 */
11
12#ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_H264_H264_VIDEO_TOOLBOX_DECODER_H_
13#define WEBRTC_MODULES_VIDEO_CODING_CODECS_H264_H264_VIDEO_TOOLBOX_DECODER_H_
14
15#include "webrtc/modules/video_coding/codecs/h264/include/h264.h"
16
17#if defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)
18
19#include <VideoToolbox/VideoToolbox.h>
20
21// This file provides a H264 encoder implementation using the VideoToolbox
22// APIs. Since documentation is almost non-existent, this is largely based on
23// the information in the VideoToolbox header files, a talk from WWDC 2014 and
24// experimentation.
25
26namespace webrtc {
27
28class H264VideoToolboxDecoder : public H264Decoder {
29 public:
30  H264VideoToolboxDecoder();
31
32  ~H264VideoToolboxDecoder() override;
33
34  int InitDecode(const VideoCodec* video_codec, int number_of_cores) override;
35
36  int Decode(const EncodedImage& input_image,
37             bool missing_frames,
38             const RTPFragmentationHeader* fragmentation,
39             const CodecSpecificInfo* codec_specific_info,
40             int64_t render_time_ms) override;
41
42  int RegisterDecodeCompleteCallback(DecodedImageCallback* callback) override;
43
44  int Release() override;
45
46  int Reset() override;
47
48  const char* ImplementationName() const override;
49
50 private:
51  int ResetDecompressionSession();
52  void ConfigureDecompressionSession();
53  void DestroyDecompressionSession();
54  void SetVideoFormat(CMVideoFormatDescriptionRef video_format);
55
56  DecodedImageCallback* callback_;
57  CMVideoFormatDescriptionRef video_format_;
58  VTDecompressionSessionRef decompression_session_;
59};  // H264VideoToolboxDecoder
60
61}  // namespace webrtc
62
63#endif  // defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)
64#endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_H264_H264_VIDEO_TOOLBOX_DECODER_H_
65