Introduce VideoConfig/AudioConfig class for CMA backend

chromecast/public/media/decoder_config.cc

Index: chromecast/public/media/decoder_config.cc
diff --git a/chromecast/public/media/decoder_config.cc b/chromecast/public/media/decoder_config.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1b372415a28b54057ce9263529a1663c9ef30fdf
--- /dev/null
+++ b/chromecast/public/media/decoder_config.cc
@@ -0,0 +1,62 @@
+// Copyright 2015 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 "decoder_config.h"
+
+namespace chromecast {
+namespace media {
+
+namespace {
+
+// Maximum audio bytes per sample.
+static const int kMaxBytesPerSample = 4;
+
+// Maximum audio sampling rate.
+static const int kMaxSampleRate = 192000;
+
+}  // namespace
+
+DecoderConfig::DecoderConfig()
+  : is_encrypted(false) {
+}
+
+DecoderConfig::~DecoderConfig() {
+}
+
+AudioConfig::AudioConfig()
+    : codec(kAudioCodecUnknown),
+      bytes_per_channel(0),
+      channel_number(0),
+      samples_per_second(0) {
+}
+
+AudioConfig::~AudioConfig() {
+}
+
+bool AudioConfig::IsValidConfig() const {
+  return codec >= kAudioCodecMin &&
+      codec <= kAudioCodecMax &&
+      channel_number > 0 &&
+      bytes_per_channel > 0 &&
+      bytes_per_channel <= kMaxBytesPerSample &&
+      samples_per_second > 0 &&
+      samples_per_second <= kMaxSampleRate;
+}
+
+VideoConfig::VideoConfig()
+    : codec(kVideoCodecUnknown),
+      profile(kVideoProfileUnknown),
+      additional_config(nullptr) {
+}
+
+VideoConfig::~VideoConfig() {
+}
+
+bool VideoConfig::IsValidConfig() const {
+  return codec >= kVideoCodecMin && codec <= kVideoCodecMax;
+}
+
+
+}  // namespace media
+}  // namespace chromecast