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 media {
  15 class DecryptConfig;
  16 }
  17
  18 namespace chromecast {
  19 namespace media {
  20
  21 // DecoderBufferBase exposes only the properties of an audio/video buffer.
  22 // The way a DecoderBufferBase is created and organized in memory
  23 // is left as a detail of the implementation of derived classes.
  24 class DecoderBufferBase
  25     : public base::RefCountedThreadSafe<DecoderBufferBase> {
  26  public:
  27   DecoderBufferBase();
  28
  29   // Returns the stream id of this decoder buffer belonging to. it's optional
  30   // and default value is kPrimary.
  31   virtual StreamId stream_id() const = 0;
  32
  33   // Returns the PTS of the frame.
  34   virtual base::TimeDelta timestamp() const = 0;
  35
  36   // Sets the PTS of the frame.
  37   virtual void set_timestamp(const base::TimeDelta& timestamp) = 0;
  38
  39   // Gets the frame data.
  40   virtual const uint8* data() const = 0;
  41   virtual uint8* writable_data() const = 0;
  42
  43   // Returns the size of the frame in bytes.
  44   virtual size_t data_size() const = 0;
  45
  46   // Returns the decrypt configuration.
  47   // Returns NULL if the buffer has no decrypt info.
  48   virtual const ::media::DecryptConfig* decrypt_config() const = 0;
  49
  50   // Indicate if this is a special frame that indicates the end of the stream.
  51   // If true, functions to access the frame content cannot be called.
  52   virtual bool end_of_stream() const = 0;
  53
  54  protected:
  55   friend class base::RefCountedThreadSafe<DecoderBufferBase>;
  56   virtual ~DecoderBufferBase();
  57
  58  private:
  59   DISALLOW_COPY_AND_ASSIGN(DecoderBufferBase);
  60 };
  61
  62 }  // namespace media
  63 }  // namespace chromecast
  64
  65 #endif  // CHROMECAST_MEDIA_CMA_BASE_DECODER_BUFFER_BASE_H_