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      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/cdm_video_decoder.h"
     12 #include "media/cdm/ppapi/clear_key_cdm_common.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(ClearKeyCdmHost* 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   ClearKeyCdmHost* 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_
     63