webkit/media/crypto/ppapi/ffmpeg_cdm_video_decoder.h

   1 // Copyright (c) 2012 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 WEBKIT_MEDIA_CRYPTO_PPAPI_FFMPEG_CDM_VIDEO_DECODER_H_
   6 #define WEBKIT_MEDIA_CRYPTO_PPAPI_FFMPEG_CDM_VIDEO_DECODER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "webkit/media/crypto/ppapi/cdm/content_decryption_module.h"
  11 #include "webkit/media/crypto/ppapi/cdm_video_decoder.h"
  12
  13 struct AVCodecContext;
  14 struct AVFrame;
  15
  16 namespace webkit_media {
  17
  18 class FFmpegCdmVideoDecoder : public CdmVideoDecoder {
  19  public:
  20   explicit FFmpegCdmVideoDecoder(cdm::Host* host);
  21   virtual ~FFmpegCdmVideoDecoder();
  22
  23   // CdmVideoDecoder implementation.
  24   virtual bool Initialize(const cdm::VideoDecoderConfig& config) OVERRIDE;
  25   virtual void Deinitialize() OVERRIDE;
  26   virtual void Reset() OVERRIDE;
  27   virtual cdm::Status DecodeFrame(const uint8_t* compressed_frame,
  28                                   int32_t compressed_frame_size,
  29                                   int64_t timestamp,
  30                                   cdm::VideoFrame* decoded_frame) OVERRIDE;
  31   virtual bool is_initialized() const OVERRIDE { return is_initialized_; }
  32
  33   // Returns true when |format| and |data_size| specify a supported video
  34   // output configuration.
  35   static bool IsValidOutputConfig(cdm::VideoFormat format,
  36                                   const cdm::Size& data_size);
  37
  38  private:
  39   // Allocates storage, then copies video frame stored in |av_frame_| to
  40   // |cdm_video_frame|. Returns true when allocation and copy succeed.
  41   bool CopyAvFrameTo(cdm::VideoFrame* cdm_video_frame);
  42
  43   void ReleaseFFmpegResources();
  44
  45   // FFmpeg structures owned by this object.
  46   AVCodecContext* codec_context_;
  47   AVFrame* av_frame_;
  48
  49   bool is_initialized_;
  50
  51   cdm::Host* const host_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(FFmpegCdmVideoDecoder);
  54 };
  55
  56 }  // namespace webkit_media
  57
  58 #endif  // WEBKIT_MEDIA_CRYPTO_PPAPI_FFMPEG_CDM_VIDEO_DECODER_H_