Audio/video data streaming over shared memory.

chromecast/media/cma/ipc_streamer/audio_decoder_config_marshaller.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chromecast/media/cma/ipc_streamer/audio_decoder_config_marshaller.h"
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "chromecast/media/cma/ipc/media_message.h"
+#include "media/base/audio_decoder_config.h"
+
+namespace chromecast {
+namespace media {
+
+namespace {
+const size_t kMaxExtraDataSize = 16 * 1024;
+}
+
+// static
+void AudioDecoderConfigMarshaller::Write(
+    const ::media::AudioDecoderConfig& config, MediaMessage* msg) {
+  CHECK(msg->WritePod(config.codec()));
+  CHECK(msg->WritePod(config.channel_layout()));
+  CHECK(msg->WritePod(config.samples_per_second()));
+  CHECK(msg->WritePod(config.sample_format()));
+  CHECK(msg->WritePod(config.is_encrypted()));
+  CHECK(msg->WritePod(config.extra_data_size()));
+  if (config.extra_data_size() > 0)
+    CHECK(msg->WriteBuffer(config.extra_data(), config.extra_data_size()));
+}
+
+// static
+::media::AudioDecoderConfig AudioDecoderConfigMarshaller::Read(
+    MediaMessage* msg) {
+  ::media::AudioCodec codec;
+  ::media::SampleFormat sample_format;
+  ::media::ChannelLayout channel_layout;
+  int samples_per_second;
+  bool is_encrypted;
+  size_t extra_data_size;
+  scoped_ptr<uint8[]> extra_data;
+
+  CHECK(msg->ReadPod(&codec));
+  CHECK(msg->ReadPod(&channel_layout));
+  CHECK(msg->ReadPod(&samples_per_second));
+  CHECK(msg->ReadPod(&sample_format));
+  CHECK(msg->ReadPod(&is_encrypted));
+  CHECK(msg->ReadPod(&extra_data_size));
+
+  CHECK_GE(codec, ::media::kUnknownAudioCodec);
+  CHECK_LE(codec, ::media::kAudioCodecMax);
+  CHECK_GE(channel_layout, ::media::CHANNEL_LAYOUT_NONE);
+  CHECK_LE(channel_layout, ::media::CHANNEL_LAYOUT_MAX);
+  CHECK_GE(sample_format, ::media::kUnknownSampleFormat);
+  CHECK_LE(sample_format, ::media::kSampleFormatMax);
+  CHECK_LT(extra_data_size, kMaxExtraDataSize);
+  if (extra_data_size > 0) {
+    extra_data.reset(new uint8[extra_data_size]);
+    CHECK(msg->ReadBuffer(extra_data.get(), extra_data_size));
+  }
+
+  return ::media::AudioDecoderConfig(
+      codec, sample_format,
+      channel_layout, samples_per_second,
+      extra_data.get(), extra_data_size,
+      is_encrypted);
+}
+
+}  // namespace media
+}  // namespace chromecast