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 #include "chromecast/public/media/stream_id.h"
  13
  14 namespace chromecast {
  15 namespace media {
  16 class CastDecryptConfig;
  17
  18 // DecoderBufferBase exposes only the properties of an audio/video buffer.
  19 // The way a DecoderBufferBase is created and organized in memory
  20 // is left as a detail of the implementation of derived classes.
  21 class DecoderBufferBase
  22     : public base::RefCountedThreadSafe<DecoderBufferBase> {
  23  public:
  24   DecoderBufferBase() {}
  25
  26   // Returns the stream id of this decoder buffer belonging to. it's optional
  27   // and default value is kPrimary.
  28   virtual StreamId stream_id() const = 0;
  29
  30   // Returns the PTS of the frame.
  31   virtual base::TimeDelta timestamp() const = 0;
  32
  33   // Sets the PTS of the frame.
  34   virtual void set_timestamp(base::TimeDelta timestamp) = 0;
  35
  36   // Gets the frame data.
  37   virtual const uint8* data() const = 0;
  38   virtual uint8* writable_data() const = 0;
  39
  40   // Returns the size of the frame in bytes.
  41   virtual size_t data_size() const = 0;
  42
  43   // Returns the decrypt configuration.
  44   // Returns NULL if the buffer has no decrypt info.
  45   virtual const CastDecryptConfig* decrypt_config() const = 0;
  46
  47   // Indicate if this is a special frame that indicates the end of the stream.
  48   // If true, functions to access the frame content cannot be called.
  49   virtual bool end_of_stream() const = 0;
  50
  51  protected:
  52   friend class base::RefCountedThreadSafe<DecoderBufferBase>;
  53   virtual ~DecoderBufferBase() {}
  54
  55  private:
  56   DISALLOW_COPY_AND_ASSIGN(DecoderBufferBase);
  57 };
  58
  59 }  // namespace media
  60 }  // namespace chromecast
  61
  62 #endif  // CHROMECAST_MEDIA_CMA_BASE_DECODER_BUFFER_BASE_H_