MediaCodec: convert per frame resources into static count (96939a5e) · Commits · e / os / android_frameworks_av

media/libstagefright/MediaCodec.cpp

+114 −0

Original line number	Diff line number	Diff line
		@@ -1220,6 +1220,95 @@ inline MediaResourceType getResourceType(const std::string& resourceName) {
		return MediaResourceType::kUnspecified;
		}

		/**
		* Get the float/integer value associated with the given key.
		*
		* If no such key is found, it will return false without updating
		* the value.
		*/
		static bool getValueFor(const sp<AMessage>& msg,
		const char* key,
		float* value) {
		if (msg->findFloat(key, value)) {
		return true;
		}

		int32_t intValue = 0;
		if (msg->findInt32(key, &intValue)) {
		*value = (float)intValue;
		return true;
		}

		return false;
		}

		/*
		* Use operating frame rate for per frame resource calculation as below:
		* - Check if operating-rate is available. If so, use it.
		* - If its encoder and if we have capture-rate, use that as frame rate.
		* - Else, check if frame-rate is available. If so, use it.
		* - Else, use the default value.
		*
		* NOTE: This function is called with format that could be:
		* - format used to configure the codec
		* - codec's input format
		* - codec's output format
		*
		* Some of the key's may not be present in either input or output format or
		* both.
		* For example, "capture-rate", this is currently only used in configure format.
		*
		* For encoders, in rare cases, we would expect "operating-rate" to be set
		* for high-speed capture and it's only used during configuration.
		*/
		static float getOperatingFrameRate(const sp<AMessage>& format,
		float defaultFrameRate,
		bool isEncoder) {
		float operatingRate = 0;
		if (getValueFor(format, "operating-rate", &operatingRate)) {
		// Use operating rate to convert per-frame resources into a whole.
		return operatingRate;
		}

		float captureRate = 0;
		if (isEncoder && getValueFor(format, "capture-rate", &captureRate)) {
		// Use capture rate to convert per-frame resources into a whole.
		return captureRate;
		}

		// Otherwise use frame-rate (or fallback to the default framerate passed)
		float frameRate = defaultFrameRate;
		getValueFor(format, "frame-rate", &frameRate);
		return frameRate;
		}

		/**
		* Convert per frame/input/output resources into static_count
		*
		* TODO: (girishshetty): In the future, change InstanceResourceInfo to hold:
		* - resource type (const, per frame, per input/output)
		* - resource count
		*/
		std::vector<InstanceResourceInfo> MediaCodec::computeDynamicResources(
		const std::vector<InstanceResourceInfo>& inResources) {
		std::vector<InstanceResourceInfo> dynamicResources;
		for (const InstanceResourceInfo& resource : inResources) {
		// If mStaticCount isn't 0, nothing to be changed because effectively this is a union.
		if (resource.mStaticCount != 0) {
		dynamicResources.push_back(resource);
		continue;
		}
		if (resource.mPerFrameCount != 0) {
		uint64_t staticCount = resource.mPerFrameCount * mFrameRate;
		// We are tracking everything as static count here. So set per frame count to 0.
		dynamicResources.emplace_back(resource.mName, staticCount, 0);
		}
		// TODO: (girishshetty): Add per input/output resource conversion here.
		}

		return dynamicResources;
		}

		//static
		status_t MediaCodec::getGloballyAvailableResources(std::vector<GlobalResourceInfo>& resources) {
		resources.clear();
		@@ -2597,6 +2686,14 @@ status_t MediaCodec::configure(

		sp<AMessage> callback = mCallback;

		if (mDomain == DOMAIN_VIDEO) {
		// Use format to compute initial operating frame rate.
		// After the successful configuration (and also possibly when output
		// format change notification), this value will be recalculated.
		bool isEncoder = (flags & CONFIGURE_FLAG_ENCODE);
		mFrameRate = getOperatingFrameRate(format, mFrameRate, isEncoder);
		}

		std::vector<MediaResourceParcel> resources;
		resources.push_back(MediaResource::CodecResource(mFlags & kFlagIsSecure,
		toMediaResourceSubType(mIsHardware, mDomain)));
		@@ -4432,6 +4529,12 @@ void MediaCodec::onMessageReceived(const sp<AMessage> &msg) {
		Mutexed<std::vector<InstanceResourceInfo>>::Locked resourcesLocked(
		mRequiredResourceInfo);
		*resourcesLocked = mCodec->getRequiredSystemResources();
		// Use input and output formats to get operating frame-rate.
		bool isEncoder = mFlags & kFlagIsEncoder;
		mFrameRate = getOperatingFrameRate(mInputFormat, mFrameRate, isEncoder);
		mFrameRate = getOperatingFrameRate(mOutputFormat, mFrameRate, isEncoder);
		// Update the dynamic resource usage with the current operating frame-rate.
		resourcesLocked = computeDynamicResources(resourcesLocked);
		}

		setState(CONFIGURED);
		@@ -6183,6 +6286,15 @@ void MediaCodec::handleOutputFormatChangeIfNeeded(const sp<MediaCodecBuffer> &bu
		}

		updateHdrMetrics(false /* isConfig */);

		if (mDomain == DOMAIN_VIDEO) {
		bool isEncoder = mFlags & kFlagIsEncoder;
		// Since the output format has changed, see if we need to update
		// operating frame-rate.
		mFrameRate = getOperatingFrameRate(mOutputFormat, mFrameRate, isEncoder);
		// TODO: (girishshetty): See if the change in operating frame-rate calls for
		// onRequiredResourcesChanged callback.
		}
		}

		// always called from the looper thread (and therefore not mutexed)
		@@ -7227,6 +7339,8 @@ void MediaCodec::onRequiredResourcesChanged(
		android::media::codec::codec_availability_support()) {
		Mutexed<std::vector<InstanceResourceInfo>>::Locked resourcesLocked(mRequiredResourceInfo);
		*resourcesLocked = resourceInfo;
		// Convert per frame/input/output resources into static_count
		resourcesLocked = computeDynamicResources(resourcesLocked);
		canIssueCallback = true;
		}
		// Make sure codec availability feature is on.

media/libstagefright/include/media/stagefright/MediaCodec.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -381,6 +381,11 @@ private:
		uint32_t flags,
		status_t* err);

		// Convert all dynamic (non-constant) resource types into
		// constant resource counts.
		std::vector<InstanceResourceInfo> computeDynamicResources(
		const std::vector<InstanceResourceInfo>& resources);

		private:
		enum State {
		UNINITIALIZED,
		@@ -820,6 +825,9 @@ private:
		// Required resource info for this codec.
		Mutexed<std::vector<InstanceResourceInfo>> mRequiredResourceInfo;

		// Default frame-rate.
		float mFrameRate = 30.0;

		DISALLOW_EVIL_CONSTRUCTORS(MediaCodec);
		};