Support encrypted audio stream in demuxer.

media/base/audio_decoder_config.cc

Index: media/base/audio_decoder_config.cc
diff --git a/media/base/audio_decoder_config.cc b/media/base/audio_decoder_config.cc
index 1f259f35a2ab90fdf5fccd2896d68705b15896cd..bd0e6a7e75f84ea5ee4bf76c33e6a01e95597a69 100644
--- a/media/base/audio_decoder_config.cc
+++ b/media/base/audio_decoder_config.cc
@@ -16,7 +16,8 @@ AudioDecoderConfig::AudioDecoderConfig()
       bits_per_channel_(0),
       channel_layout_(CHANNEL_LAYOUT_UNSUPPORTED),
       samples_per_second_(0),
-      extra_data_size_(0) {
+      extra_data_size_(0),
+      is_encrypted_(false) {
 }
 
 AudioDecoderConfig::AudioDecoderConfig(AudioCodec codec,
@@ -24,9 +25,10 @@ AudioDecoderConfig::AudioDecoderConfig(AudioCodec codec,
                                        ChannelLayout channel_layout,
                                        int samples_per_second,
                                        const uint8* extra_data,
-                                       size_t extra_data_size) {
+                                       size_t extra_data_size,
+                                       bool is_encrypted) {
   Initialize(codec, bits_per_channel, channel_layout, samples_per_second,
-             extra_data, extra_data_size, true);
+             extra_data, extra_data_size, is_encrypted, true);
 }
 
 void AudioDecoderConfig::Initialize(AudioCodec codec,
@@ -35,6 +37,7 @@ void AudioDecoderConfig::Initialize(AudioCodec codec,
                                     int samples_per_second,
                                     const uint8* extra_data,
                                     size_t extra_data_size,
+                                    bool is_encrypted,
                                     bool record_stats) {
   CHECK((extra_data_size != 0) == (extra_data != NULL));
 
@@ -68,6 +71,8 @@ void AudioDecoderConfig::Initialize(AudioCodec codec,
   } else {
     extra_data_.reset();
   }
+
+  is_encrypted_ = is_encrypted;
 }
 
 AudioDecoderConfig::~AudioDecoderConfig() {}
@@ -88,7 +93,8 @@ bool AudioDecoderConfig::Matches(const AudioDecoderConfig& config) const {
           (samples_per_second() == config.samples_per_second()) &&
           (extra_data_size() == config.extra_data_size()) &&
           (!extra_data() || !memcmp(extra_data(), config.extra_data(),
-                                    extra_data_size())));
+                                    extra_data_size())) &&
+          (is_encrypted() == config.is_encrypted()));
 }
 
 void AudioDecoderConfig::CopyFrom(const AudioDecoderConfig& audio_config) {
@@ -98,6 +104,7 @@ void AudioDecoderConfig::CopyFrom(const AudioDecoderConfig& audio_config) {
              audio_config.samples_per_second(),
              audio_config.extra_data(),
              audio_config.extra_data_size(),
+             audio_config.is_encrypted(),
              false);
 }
 
@@ -125,4 +132,8 @@ size_t AudioDecoderConfig::extra_data_size() const {
   return extra_data_size_;
 }
 
+bool AudioDecoderConfig::is_encrypted() const {
+  return is_encrypted_;
+}
+
 }  // namespace media