Merge "aaudio: use fmin and fmax to block Nan" into pi-dev (c3d554d4) · Commits · e / os / android_frameworks_av

media/libaaudio/src/utility/AAudioUtilities.cpp

+10 −7

Original line number	Diff line number	Diff line
		@@ -59,10 +59,15 @@ static inline int16_t clamp16_from_float(float f) {
		return (int16_t) roundf(fmaxf(fminf(f * scale, scale - 1.f), -scale));
		}

		// Clip to valid range of a float sample to prevent excessive volume.
		// By using fmin and fmax we also protect against NaN.
		static float clipToMinMaxHeadroom(float input) {
		return fmin(MAX_HEADROOM, fmax(MIN_HEADROOM, input));
		}

		static float clipAndClampFloatToPcm16(float sample, float scaler) {
		// Clip to valid range of a float sample to prevent excessive volume.
		if (sample > MAX_HEADROOM) sample = MAX_HEADROOM;
		else if (sample < MIN_HEADROOM) sample = MIN_HEADROOM;
		sample = clipToMinMaxHeadroom(sample);

		// Scale and convert to a short.
		float fval = sample * scaler;
		@@ -127,6 +132,7 @@ void AAudioConvert_pcm16ToFloat(const int16_t *source,
		}
		}


		// This code assumes amplitude1 and amplitude2 are between 0.0 and 1.0
		void AAudio_linearRamp(const float *source,
		float *destination,
		@@ -139,10 +145,8 @@ void AAudio_linearRamp(const float *source,
		for (int frameIndex = 0; frameIndex < numFrames; frameIndex++) {
		for (int sampleIndex = 0; sampleIndex < samplesPerFrame; sampleIndex++) {
		float sample = *source++;

		// Clip to valid range of a float sample to prevent excessive volume.
		if (sample > MAX_HEADROOM) sample = MAX_HEADROOM;
		else if (sample < MIN_HEADROOM) sample = MIN_HEADROOM;
		sample = clipToMinMaxHeadroom(sample);

		destination++ = sample scaler;
		}
		@@ -240,8 +244,7 @@ void AAudio_linearRampMonoToStereo(const float *source,
		float sample = *source++;

		// Clip to valid range of a float sample to prevent excessive volume.
		if (sample > MAX_HEADROOM) sample = MAX_HEADROOM;
		else if (sample < MIN_HEADROOM) sample = MIN_HEADROOM;
		sample = clipToMinMaxHeadroom(sample);

		const float scaler = amplitude1 + (frameIndex * delta);
		float sampleScaled = sample * scaler;