chromecast/media/cma/ipc_streamer/audio_decoder_config_marshaller.cc

   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 #include "chromecast/media/cma/ipc_streamer/audio_decoder_config_marshaller.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/logging.h"
   9 #include "chromecast/media/cma/ipc/media_message.h"
  10 #include "media/base/audio_decoder_config.h"
  11
  12 namespace chromecast {
  13 namespace media {
  14
  15 namespace {
  16 const size_t kMaxExtraDataSize = 16 * 1024;
  17 }
  18
  19 // static
  20 void AudioDecoderConfigMarshaller::Write(
  21     const ::media::AudioDecoderConfig& config, MediaMessage* msg) {
  22   CHECK(msg->WritePod(config.codec()));
  23   CHECK(msg->WritePod(config.channel_layout()));
  24   CHECK(msg->WritePod(config.samples_per_second()));
  25   CHECK(msg->WritePod(config.sample_format()));
  26   CHECK(msg->WritePod(config.is_encrypted()));
  27   CHECK(msg->WritePod(config.extra_data_size()));
  28   if (config.extra_data_size() > 0)
  29     CHECK(msg->WriteBuffer(config.extra_data(), config.extra_data_size()));
  30 }
  31
  32 // static
  33 ::media::AudioDecoderConfig AudioDecoderConfigMarshaller::Read(
  34     MediaMessage* msg) {
  35   ::media::AudioCodec codec;
  36   ::media::SampleFormat sample_format;
  37   ::media::ChannelLayout channel_layout;
  38   int samples_per_second;
  39   bool is_encrypted;
  40   size_t extra_data_size;
  41   scoped_ptr<uint8[]> extra_data;
  42
  43   CHECK(msg->ReadPod(&codec));
  44   CHECK(msg->ReadPod(&channel_layout));
  45   CHECK(msg->ReadPod(&samples_per_second));
  46   CHECK(msg->ReadPod(&sample_format));
  47   CHECK(msg->ReadPod(&is_encrypted));
  48   CHECK(msg->ReadPod(&extra_data_size));
  49
  50   CHECK_GE(codec, ::media::kUnknownAudioCodec);
  51   CHECK_LE(codec, ::media::kAudioCodecMax);
  52   CHECK_GE(channel_layout, ::media::CHANNEL_LAYOUT_NONE);
  53   CHECK_LE(channel_layout, ::media::CHANNEL_LAYOUT_MAX);
  54   CHECK_GE(sample_format, ::media::kUnknownSampleFormat);
  55   CHECK_LE(sample_format, ::media::kSampleFormatMax);
  56   CHECK_LT(extra_data_size, kMaxExtraDataSize);
  57   if (extra_data_size > 0) {
  58     extra_data.reset(new uint8[extra_data_size]);
  59     CHECK(msg->ReadBuffer(extra_data.get(), extra_data_size));
  60   }
  61
  62   return ::media::AudioDecoderConfig(
  63       codec, sample_format,
  64       channel_layout, samples_per_second,
  65       extra_data.get(), extra_data_size,
  66       is_encrypted);
  67 }
  68
  69 }  // namespace media
  70 }  // namespace chromecast