libaudiohal: extract the offload metadata from the parameters

Bug: 270552159
Test: Using YTMusic to play local compressed files.
Change-Id: I8bb7a0d402907f14180c61a2e8f8b4e836c009d5
diff --git a/media/libmediahelper/AudioParameter.cpp b/media/libmediahelper/AudioParameter.cpp
index 382a920..9a8156e 100644
--- a/media/libmediahelper/AudioParameter.cpp
+++ b/media/libmediahelper/AudioParameter.cpp
@@ -61,6 +61,12 @@
         AUDIO_PARAMETER_DEVICE_ADDITIONAL_OUTPUT_DELAY;
 const char * const AudioParameter::keyMaxAdditionalOutputDeviceDelay =
         AUDIO_PARAMETER_DEVICE_MAX_ADDITIONAL_OUTPUT_DELAY;
+const char * const AudioParameter::keyOffloadCodecAverageBitRate = AUDIO_OFFLOAD_CODEC_AVG_BIT_RATE;
+const char * const AudioParameter::keyOffloadCodecSampleRate = AUDIO_OFFLOAD_CODEC_SAMPLE_RATE;
+const char * const AudioParameter::keyOffloadCodecChannels = AUDIO_OFFLOAD_CODEC_NUM_CHANNEL;
+const char * const AudioParameter::keyOffloadCodecDelaySamples = AUDIO_OFFLOAD_CODEC_DELAY_SAMPLES;
+const char * const AudioParameter::keyOffloadCodecPaddingSamples =
+        AUDIO_OFFLOAD_CODEC_PADDING_SAMPLES;
 
 AudioParameter::AudioParameter(const String8& keyValuePairs)
 {
@@ -226,4 +232,9 @@
     }
 }
 
+bool AudioParameter::containsKey(const String8& key) const
+{
+    return mParameters.indexOfKey(key) >= 0;
+}
+
 } // namespace android
diff --git a/media/libmediahelper/include/media/AudioParameter.h b/media/libmediahelper/include/media/AudioParameter.h
index 9a6ca8a..350f472 100644
--- a/media/libmediahelper/include/media/AudioParameter.h
+++ b/media/libmediahelper/include/media/AudioParameter.h
@@ -107,6 +107,12 @@
     static const char * const keyAdditionalOutputDeviceDelay;
     static const char * const keyMaxAdditionalOutputDeviceDelay;
 
+    static const char * const keyOffloadCodecAverageBitRate;
+    static const char * const keyOffloadCodecSampleRate;
+    static const char * const keyOffloadCodecChannels;
+    static const char * const keyOffloadCodecDelaySamples;
+    static const char * const keyOffloadCodecPaddingSamples;
+
     String8 toString() const { return toStringImpl(true); }
     String8 keysToString() const { return toStringImpl(false); }
 
@@ -125,6 +131,7 @@
 
     size_t size() const { return mParameters.size(); }
 
+    bool containsKey(const String8& key) const;
 private:
     String8 mKeyValuePairs;
     KeyedVector <String8, String8> mParameters;