media/cdm/ppapi/external_clear_key/ffmpeg_cdm_video_decoder.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_CDM_PPAPI_EXTERNAL_CLEAR_KEY_FFMPEG_CDM_VIDEO_DECODER_H_
   6 #define MEDIA_CDM_PPAPI_EXTERNAL_CLEAR_KEY_FFMPEG_CDM_VIDEO_DECODER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "media/cdm/ppapi/external_clear_key/cdm_video_decoder.h"
  12 #include "media/cdm/ppapi/external_clear_key/clear_key_cdm_common.h"
  13 #include "media/ffmpeg/ffmpeg_deleters.h"
  14
  15 struct AVCodecContext;
  16 struct AVFrame;
  17
  18 namespace media {
  19
  20 class FFmpegCdmVideoDecoder : public CdmVideoDecoder {
  21  public:
  22   explicit FFmpegCdmVideoDecoder(ClearKeyCdmHost* host);
  23   ~FFmpegCdmVideoDecoder() override;
  24
  25   // CdmVideoDecoder implementation.
  26   bool Initialize(const cdm::VideoDecoderConfig& config) override;
  27   void Deinitialize() override;
  28   void Reset() override;
  29   cdm::Status DecodeFrame(const uint8_t* compressed_frame,
  30                           int32_t compressed_frame_size,
  31                           int64_t timestamp,
  32                           cdm::VideoFrame* decoded_frame) override;
  33   bool is_initialized() const override { return is_initialized_; }
  34
  35   // Returns true when |format| and |data_size| specify a supported video
  36   // output configuration.
  37   static bool IsValidOutputConfig(cdm::VideoFormat format,
  38                                   const cdm::Size& data_size);
  39
  40  private:
  41   // Allocates storage, then copies video frame stored in |av_frame_| to
  42   // |cdm_video_frame|. Returns true when allocation and copy succeed.
  43   bool CopyAvFrameTo(cdm::VideoFrame* cdm_video_frame);
  44
  45   void ReleaseFFmpegResources();
  46
  47   // FFmpeg structures owned by this object.
  48   scoped_ptr<AVCodecContext, ScopedPtrAVFreeContext> codec_context_;
  49   scoped_ptr<AVFrame, ScopedPtrAVFreeFrame> av_frame_;
  50
  51   bool is_initialized_;
  52
  53   ClearKeyCdmHost* const host_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(FFmpegCdmVideoDecoder);
  56 };
  57
  58 }  // namespace media
  59
  60 #endif  // MEDIA_CDM_PPAPI_EXTERNAL_CLEAR_KEY_FFMPEG_CDM_VIDEO_DECODER_H_