Motown: Ffmpeg video decoder

services/media/framework_ffmpeg/ffmpeg_audio_decoder.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_AUDIO_DECODER_H_
 #define SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_AUDIO_DECODER_H_
 
 #include "services/media/framework/util/lpcm_util.h"
 #include "services/media/framework_ffmpeg/ffmpeg_decoder_base.h"
 
@@ skipping 15 matching lines @@
              const ffmpeg::AvFramePtr& av_frame_ptr,
              PayloadAllocator* allocator,
              bool* frame_decoded_out) override;
 
   PacketPtr CreateOutputPacket(const AVFrame& av_frame,
                                PayloadAllocator* allocator) override;
 
   PacketPtr CreateOutputEndOfStreamPacket() override;
 
  private:
-  // Used to control deallocation of buffers.
-  class AvBufferContext {
-   public:
-    AvBufferContext(size_t size, PayloadAllocator* allocator)
-        : size_(size), allocator_(allocator) {
-      DCHECK(allocator_);
-      if (size_ == 0) {
-        buffer_ = nullptr;
-      } else {
-        buffer_ =
-            static_cast<uint8_t*>(allocator_->AllocatePayloadBuffer(size_));
-      }
-    }
-
-    ~AvBufferContext() {
-      if (allocator_ == nullptr) {
-        // Previously released.
-        return;
-      }
-
-      if (size_ != 0) {
-        DCHECK(buffer_ != nullptr);
-        allocator_->ReleasePayloadBuffer(size_, buffer_);
-        return;
-      }
-
-      DCHECK(buffer_ == nullptr);
-    }
-
-    uint8_t* buffer() { return buffer_; }
-
-    size_t size() { return size_; }
-
-    // Releases ownership of the buffer.
-    uint8_t* Release() {
-      DCHECK(allocator_) << "AvBufferContext released twice";
-      uint8_t* result = buffer_;
-      buffer_ = nullptr;
-      size_ = 0;
-      allocator_ = nullptr;
-      return result;
-    }
-
-   private:
-    uint8_t* buffer_;
-    size_t size_;
-    PayloadAllocator* allocator_;
-  };
-
   // Align sample buffers on 32-byte boundaries. This is the value that Chromium
   // uses and is supposed to work for all processor architectures. Strangely, if
   // we were to tell ffmpeg to use the default (by passing 0), it aligns on 32
   // sample (not byte) boundaries.
   static const int kChannelAlign = 32;
 
   // Callback used by the ffmpeg decoder to acquire a buffer.
   static int AllocateBufferForAvFrame(AVCodecContext* av_codec_context,
                                       AVFrame* av_frame,
                                       int flags);
@@ skipping 13 matching lines @@
   std::unique_ptr<StreamType> stream_type_;
 
   // Used to supply missing PTS.
   int64_t next_pts_ = Packet::kUnknownPts;
 };
 
 }  // namespace media
 }  // namespace mojo
 
 #endif  // SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_AUDIO_DECODER_H_