media/formats/webm/opus_packet_builder.h

   1 // Copyright (c) 2015 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 MEDIA_FORMATS_WEBM_OPUS_PACKET_BUILDER_H_
   6 #define MEDIA_FORMATS_WEBM_OPUS_PACKET_BUILDER_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/scoped_vector.h"
  12
  13 namespace media {
  14
  15 // From Opus RFC. See https://tools.ietf.org/html/rfc6716#page-14
  16 enum OpusConstants {
  17   kNumPossibleOpusConfigs = 32,
  18   kMinOpusPacketFrameCount = 1,
  19   kMaxOpusPacketFrameCount = 48
  20 };
  21
  22 class OpusPacket {
  23  public:
  24   OpusPacket(uint8_t config, uint8_t frame_count, bool is_VBR);
  25   ~OpusPacket();
  26
  27   const uint8_t* data() const;
  28   int size() const;
  29   double duration_ms() const;
  30
  31  private:
  32   std::vector<uint8_t> data_;
  33   double duration_ms_;
  34
  35   DISALLOW_COPY_AND_ASSIGN(OpusPacket);
  36 };
  37
  38 // Builds an exhaustive collection of Opus packet configurations.
  39 ScopedVector<OpusPacket> BuildAllOpusPackets();
  40
  41 }  // namespace media
  42
  43 #endif  // MEDIA_FORMATS_WEBM_OPUS_PACKET_BUILDER_H_