[AOSP_IMPR] AudioPolicy: engine: add matching score API (8d7fd5a3) · Commits · e / os / android_frameworks_av

media/libaudioclient/AudioProductStrategy.cpp

+39 −14

Original line number	Diff line number	Diff line
		@@ -60,25 +60,50 @@ aidl2legacy_AudioProductStrategy(const media::AudioProductStrategy& aidl) {
		}

		// Keep in sync with android/media/audiopolicy/AudioProductStrategy#attributeMatches
		bool AudioProductStrategy::attributesMatches(const audio_attributes_t refAttributes,
		int AudioProductStrategy::attributesMatchesScore(const audio_attributes_t refAttributes,
		const audio_attributes_t clientAttritubes)
		{
		if (refAttributes == clientAttritubes) {
		return MATCH_EQUALS;
		}
		if (refAttributes == AUDIO_ATTRIBUTES_INITIALIZER) {
		// The default product strategy is the strategy that holds default attributes by convention.
		// All attributes that fail to match will follow the default strategy for routing.
		// Choosing the default must be done as a fallback, the attributes match shall not
		// select the default.
		return false;
		// Choosing the default must be done as a fallback,so return a default (zero) score to
		// allow identify the fallback.
		return MATCH_ON_DEFAULT_SCORE;
		}
		int score = MATCH_ON_DEFAULT_SCORE;
		if (refAttributes.usage == AUDIO_USAGE_UNKNOWN) {
		score \|= MATCH_ON_DEFAULT_SCORE;
		} else if (clientAttritubes.usage == refAttributes.usage) {
		score \|= MATCH_ON_USAGE_SCORE;
		} else {
		return NO_MATCH;
		}
		if (refAttributes.content_type == AUDIO_CONTENT_TYPE_UNKNOWN) {
		score \|= MATCH_ON_DEFAULT_SCORE;
		} else if (clientAttritubes.content_type == refAttributes.content_type) {
		score \|= MATCH_ON_CONTENT_TYPE_SCORE;
		} else {
		return NO_MATCH;
		}
		if (strlen(refAttributes.tags) == 0) {
		score \|= MATCH_ON_DEFAULT_SCORE;
		} else if (std::strcmp(clientAttritubes.tags, refAttributes.tags) == 0) {
		score \|= MATCH_ON_TAGS_SCORE;
		} else {
		return NO_MATCH;
		}
		if (refAttributes.flags == AUDIO_FLAG_NONE) {
		score \|= MATCH_ON_DEFAULT_SCORE;
		} else if ((clientAttritubes.flags != AUDIO_FLAG_NONE)
		&& ((clientAttritubes.flags & refAttributes.flags) == refAttributes.flags)) {
		score \|= MATCH_ON_FLAGS_SCORE;
		} else {
		return NO_MATCH;
		}
		return ((refAttributes.usage == AUDIO_USAGE_UNKNOWN) \|\|
		(clientAttritubes.usage == refAttributes.usage)) &&
		((refAttributes.content_type == AUDIO_CONTENT_TYPE_UNKNOWN) \|\|
		(clientAttritubes.content_type == refAttributes.content_type)) &&
		((refAttributes.flags == AUDIO_FLAG_NONE) \|\|
		(clientAttritubes.flags != AUDIO_FLAG_NONE &&
		(clientAttritubes.flags & refAttributes.flags) == refAttributes.flags)) &&
		((strlen(refAttributes.tags) == 0) \|\|
		(std::strcmp(clientAttritubes.tags, refAttributes.tags) == 0));
		return score;
		}

		} // namespace android

media/libaudioclient/AudioSystem.cpp

+1 −2

Original line number	Diff line number	Diff line
		@@ -2136,8 +2136,7 @@ audio_stream_type_t AudioSystem::attributesToStreamType(const audio_attributes_t
		if (strategy.getId() == psId) {
		auto attrVect = strategy.getVolumeGroupAttributes();
		auto iter = std::find_if(begin(attrVect), end(attrVect), [&attr](const auto& refAttr) {
		return AudioProductStrategy::attributesMatches(
		refAttr.getAttributes(), attr);
		return refAttr.matchesScore(attr) > 0;
		});
		if (iter != end(attrVect)) {
		return iter->getStreamType();

media/libaudioclient/VolumeGroupAttributes.cpp

+5 −0

Original line number	Diff line number	Diff line
		@@ -21,11 +21,16 @@
		#include <binder/Parcel.h>

		#include <media/AidlConversion.h>
		#include <media/AudioProductStrategy.h>
		#include <media/VolumeGroupAttributes.h>
		#include <media/PolicyAidlConversion.h>

		namespace android {

		int VolumeGroupAttributes::matchesScore(const audio_attributes_t &attributes) const {
		return AudioProductStrategy::attributesMatchesScore(mAttributes, attributes);
		}

		status_t VolumeGroupAttributes::readFromParcel(const Parcel* parcel) {
		media::AudioAttributesEx aidl;
		RETURN_STATUS_IF_ERROR(aidl.readFromParcel(parcel));

media/libaudioclient/include/media/AudioProductStrategy.h

+22 −6

Original line number	Diff line number	Diff line
		@@ -46,19 +46,35 @@ public:
		status_t writeToParcel(Parcel *parcel) const override;

		/**
		* @brief attributesMatches: checks if client attributes matches with a reference attributes
		* "matching" means the usage shall match if reference attributes has a defined usage, AND
		* content type shall match if reference attributes has a defined content type AND
		* @brief attributesMatchesScore: checks if client attributes matches with a reference
		* attributes "matching" means the usage shall match if reference attributes has a defined
		* usage, AND content type shall match if reference attributes has a defined content type AND
		* flags shall match if reference attributes has defined flags AND
		* tags shall match if reference attributes has defined tags.
		* Reference attributes "default" shall not be considered as a "true" case. This convention
		* Reference attributes "default" shall be considered as a weak match case. This convention
		* is used to identify the default strategy.
		* @param refAttributes to be considered
		* @param clientAttritubes to be considered
		* @return true if matching, false otherwise
		* @return {@code INVALID_SCORE} if not matching, {@code MATCH_ON_DEFAULT_SCORE} if matching
		* to default strategy, non zero positive score if matching a strategy.
		*/
		static bool attributesMatches(const audio_attributes_t refAttributes,
		static int attributesMatchesScore(const audio_attributes_t refAttributes,
		const audio_attributes_t clientAttritubes);

		static bool attributesMatches(const audio_attributes_t refAttributes,
		const audio_attributes_t clientAttritubes) {
		return attributesMatchesScore(refAttributes, clientAttritubes) > 0;
		}

		static const int MATCH_ON_TAGS_SCORE = 1 << 3;
		static const int MATCH_ON_FLAGS_SCORE = 1 << 2;
		static const int MATCH_ON_USAGE_SCORE = 1 << 1;
		static const int MATCH_ON_CONTENT_TYPE_SCORE = 1 << 0;
		static const int MATCH_ON_DEFAULT_SCORE = 0;
		static const int MATCH_EQUALS = MATCH_ON_TAGS_SCORE \| MATCH_ON_FLAGS_SCORE
		\| MATCH_ON_USAGE_SCORE \| MATCH_ON_CONTENT_TYPE_SCORE;
		static const int NO_MATCH = -1;

		private:
		std::string mName;
		std::vector<VolumeGroupAttributes> mVolumeGroupAttributes;

media/libaudioclient/include/media/VolumeGroupAttributes.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -41,6 +41,8 @@ public:
		mAttributes.source = AUDIO_SOURCE_INVALID;
		}

		int matchesScore(const audio_attributes_t &attributes) const;

		audio_attributes_t getAttributes() const { return mAttributes; }

		status_t readFromParcel(const Parcel *parcel) override;