media/cdm/ppapi/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_FFMPEG_CDM_VIDEO_DECODER_H_
   6 #define MEDIA_CDM_PPAPI_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/api/content_decryption_module.h"
  12 #include "media/cdm/ppapi/cdm_video_decoder.h"
  13
  14 struct AVCodecContext;
  15 struct AVFrame;
  16
  17 namespace media {
  18
  19 class ScopedPtrAVFreeContext;
  20 class ScopedPtrAVFreeFrame;
  21
  22 class FFmpegCdmVideoDecoder : public CdmVideoDecoder {
  23  public:
  24   explicit FFmpegCdmVideoDecoder(cdm::Host* host);
  25   virtual ~FFmpegCdmVideoDecoder();
  26
  27   // CdmVideoDecoder implementation.
  28   virtual bool Initialize(const cdm::VideoDecoderConfig& config) OVERRIDE;
  29   virtual void Deinitialize() OVERRIDE;
  30   virtual void Reset() OVERRIDE;
  31   virtual cdm::Status DecodeFrame(const uint8_t* compressed_frame,
  32                                   int32_t compressed_frame_size,
  33                                   int64_t timestamp,
  34                                   cdm::VideoFrame* decoded_frame) OVERRIDE;
  35   virtual bool is_initialized() const OVERRIDE { return is_initialized_; }
  36
  37   // Returns true when |format| and |data_size| specify a supported video
  38   // output configuration.
  39   static bool IsValidOutputConfig(cdm::VideoFormat format,
  40                                   const cdm::Size& data_size);
  41
  42  private:
  43   // Allocates storage, then copies video frame stored in |av_frame_| to
  44   // |cdm_video_frame|. Returns true when allocation and copy succeed.
  45   bool CopyAvFrameTo(cdm::VideoFrame* cdm_video_frame);
  46
  47   void ReleaseFFmpegResources();
  48
  49   // FFmpeg structures owned by this object.
  50   scoped_ptr_malloc<AVCodecContext, ScopedPtrAVFreeContext> codec_context_;
  51   scoped_ptr_malloc<AVFrame, ScopedPtrAVFreeFrame> av_frame_;
  52
  53   bool is_initialized_;
  54
  55   cdm::Host* const host_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(FFmpegCdmVideoDecoder);
  58 };
  59
  60 }  // namespace media
  61
  62 #endif  // MEDIA_CDM_PPAPI_FFMPEG_CDM_VIDEO_DECODER_H_