media config: expand is_encrypted to a struct.

media/base/audio_decoder_config.cc

 // Copyright (c) 2012 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 "media/base/audio_decoder_config.h"
 
 #include "base/logging.h"
 #include "media/base/limits.h"
 
 namespace media {
 
 AudioDecoderConfig::AudioDecoderConfig()
     : codec_(kUnknownAudioCodec),
       sample_format_(kUnknownSampleFormat),
       bytes_per_channel_(0),
       channel_layout_(CHANNEL_LAYOUT_UNSUPPORTED),
       samples_per_second_(0),
       bytes_per_frame_(0),
-      is_encrypted_(false),
-      codec_delay_(0) {
-}
+      encryption_scheme_(),
+      codec_delay_(0) {}
 
-AudioDecoderConfig::AudioDecoderConfig(AudioCodec codec,
-                                       SampleFormat sample_format,
-                                       ChannelLayout channel_layout,
-                                       int samples_per_second,
-                                       const std::vector<uint8_t>& extra_data,
-                                       bool is_encrypted) {
+AudioDecoderConfig::AudioDecoderConfig(
+    AudioCodec codec,
+    SampleFormat sample_format,
+    ChannelLayout channel_layout,
+    int samples_per_second,
+    const std::vector<uint8_t>& extra_data,
+    const EncryptionScheme& encryption_scheme) {
   Initialize(codec, sample_format, channel_layout, samples_per_second,
-             extra_data, is_encrypted, base::TimeDelta(), 0);
+             extra_data, encryption_scheme, base::TimeDelta(), 0);
 }
 
 AudioDecoderConfig::AudioDecoderConfig(const AudioDecoderConfig& other) =
     default;
 
 void AudioDecoderConfig::Initialize(AudioCodec codec,
                                     SampleFormat sample_format,
                                     ChannelLayout channel_layout,
                                     int samples_per_second,
                                     const std::vector<uint8_t>& extra_data,
-                                    bool is_encrypted,
+                                    const EncryptionScheme& encryption_scheme,
                                     base::TimeDelta seek_preroll,
                                     int codec_delay) {
   codec_ = codec;
   channel_layout_ = channel_layout;
   samples_per_second_ = samples_per_second;
   sample_format_ = sample_format;
   bytes_per_channel_ = SampleFormatToBytesPerChannel(sample_format);
   extra_data_ = extra_data;
-  is_encrypted_ = is_encrypted;
+  encryption_scheme_ = encryption_scheme;
   seek_preroll_ = seek_preroll;
   codec_delay_ = codec_delay;
 
   int channels = ChannelLayoutToChannelCount(channel_layout_);
   bytes_per_frame_ = channels * bytes_per_channel_;
 }
 
 AudioDecoderConfig::~AudioDecoderConfig() {}
 
 bool AudioDecoderConfig::IsValidConfig() const {
   return codec_ != kUnknownAudioCodec &&
          channel_layout_ != CHANNEL_LAYOUT_UNSUPPORTED &&
          bytes_per_channel_ > 0 &&
          bytes_per_channel_ <= limits::kMaxBytesPerSample &&
          samples_per_second_ > 0 &&
          samples_per_second_ <= limits::kMaxSampleRate &&
          sample_format_ != kUnknownSampleFormat &&
          seek_preroll_ >= base::TimeDelta() &&
          codec_delay_ >= 0;
 }
 
 bool AudioDecoderConfig::Matches(const AudioDecoderConfig& config) const {
   return ((codec() == config.codec()) &&
           (bytes_per_channel() == config.bytes_per_channel()) &&
           (channel_layout() == config.channel_layout()) &&
           (samples_per_second() == config.samples_per_second()) &&
           (extra_data() == config.extra_data()) &&
-          (is_encrypted() == config.is_encrypted()) &&
+          (encryption_scheme().Matches(config.encryption_scheme())) &&
           (sample_format() == config.sample_format()) &&
           (seek_preroll() == config.seek_preroll()) &&
           (codec_delay() == config.codec_delay()));
 }
 
 std::string AudioDecoderConfig::AsHumanReadableString() const {
   std::ostringstream s;
   s << "codec: " << GetCodecName(codec())
     << " bytes_per_channel: " << bytes_per_channel()
     << " channel_layout: " << channel_layout()
     << " samples_per_second: " << samples_per_second()
     << " sample_format: " << sample_format()
     << " bytes_per_frame: " << bytes_per_frame()
     << " seek_preroll: " << seek_preroll().InMilliseconds() << "ms"
     << " codec_delay: " << codec_delay() << " has extra data? "
     << (extra_data().empty() ? "false" : "true") << " encrypted? "
     << (is_encrypted() ? "true" : "false");
   return s.str();
 }
 
+bool AudioDecoderConfig::is_encrypted() const {
+  return encryption_scheme_.is_encrypted();
+}
+
 }  // namespace media