chromecast/media/cma/base/decoder_buffer_base.h

   1 // Copyright 2014 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 CHROMECAST_MEDIA_CMA_BASE_DECODER_BUFFER_BASE_H_
   6 #define CHROMECAST_MEDIA_CMA_BASE_DECODER_BUFFER_BASE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/macros.h"
  10 #include "base/memory/ref_counted.h"
  11 #include "base/time/time.h"
  12
  13 namespace media {
  14 class DecryptConfig;
  15 }
  16
  17 namespace chromecast {
  18 namespace media {
  19
  20 // DecoderBufferBase exposes only the properties of an audio/video buffer.
  21 // The way a DecoderBufferBase is created and organized in memory
  22 // is left as a detail of the implementation of derived classes.
  23 class DecoderBufferBase
  24     : public base::RefCountedThreadSafe<DecoderBufferBase> {
  25  public:
  26   DecoderBufferBase();
  27
  28   // Returns the PTS of the frame.
  29   virtual base::TimeDelta timestamp() const = 0;
  30
  31   // Gets the frame data.
  32   virtual const uint8* data() const = 0;
  33   virtual uint8* writable_data() const = 0;
  34
  35   // Returns the size of the frame in bytes.
  36   virtual int data_size() const = 0;
  37
  38   // Returns the decrypt configuration.
  39   // Returns NULL if the buffer has no decrypt info.
  40   virtual const ::media::DecryptConfig* decrypt_config() const = 0;
  41
  42   // Indicate if this is a special frame that indicates the end of the stream.
  43   // If true, functions to access the frame content cannot be called.
  44   virtual bool end_of_stream() const = 0;
  45
  46  protected:
  47   friend class base::RefCountedThreadSafe<DecoderBufferBase>;
  48   virtual ~DecoderBufferBase();
  49
  50  private:
  51   DISALLOW_COPY_AND_ASSIGN(DecoderBufferBase);
  52 };
  53
  54 }  // namespace media
  55 }  // namespace chromecast
  56
  57 #endif  // CHROMECAST_MEDIA_CMA_BASE_DECODER_BUFFER_BASE_H_