8  *      http://www.apache.org/licenses/LICENSE-2.0
160         size_t frames = 100; // set to an even number (2, 4, 6 ... ) stream alternates +1, -1.  in testBalance()
170         int outIndexToOffset[32] = {[0 ... 31] = -1};  in testBalance()
196             // Generate a +0.5, -0.5 alternating stream in one channel, which has variance 0.25f  in testBalance()
200                     *indata++ = (k == i) ? (j & 1 ? -0.5f : 0.5f) : 0;  in testBalance()
204             // Add an offset to the output data - this is ignored if replace instead of accumulate.  in testBalance()
205             // This must not cause the output to exceed [-1.f, 1.f] otherwise clamping will occur.  in testBalance()
214             remix->process(input.data(), output.data(), frames, accumulate, inputChannelMask);  in testBalance()
221                         *outdata++ -= 0.5f;  in testBalance()
235             // printf("power: %s %s\n", stats[0].toString().c_str(), stats[1].toString().c_str());  in testBalance()
236             double power[outChannels];  in testBalance()  local
238                 power[j] = stats[j].getPopVariance();  in testBalance()
241             // Check symmetric power for pair channels on exchange of front left/right position.  in testBalance()
242             // to do this, we save previous power measurements.  in testBalance()
247                         EXPECT_NEAR_EPSILON(power[j], savedPower[pairIndex][outPair[j]]);  in testBalance()
248                         EXPECT_NEAR_EPSILON(power[outPair[j]], savedPower[pairIndex][j]);  in testBalance()
253                 savedPower[index][j] = power[j];  in testBalance()
271                 EXPECT_NEAR(expectedPower, power[FL] + power[FR], POWER_TOLERANCE);  in testBalance()
280                         EXPECT_EQ(0.f, power[j]);  in testBalance()
290                         EXPECT_EQ(0.f, power[j]);  in testBalance()
297                         EXPECT_EQ(0.f, power[FR]);  in testBalance()
302                                 EXPECT_NEAR_EPSILON(power[j], power[outPair[j]]);  in testBalance()
306                             EXPECT_NEAR(expectedPower, power[FL] + power[FR], POWER_TOLERANCE);  in testBalance()
311                     EXPECT_EQ(0.f, power[FL]);  in testBalance()
313                         EXPECT_NEAR(expectedPower, power[FR], POWER_TOLERANCE);  in testBalance()
319                         EXPECT_NEAR_EPSILON(power[j], power[outPair[j]]);  in testBalance()
330 // The Balance test checks that the power output is symmetric with left / right channel swap.
343                 ::testing::Bool() // accumulate off, on
357 // --------------------------------------------------------------------------------------
377         constexpr float kInvalid = -0.7f;  in testIdentity()
390             remix->process(input.data(), output.data(), frames, false /* accumulate */,  in testIdentity()
414             ::testing::Bool() // accumulate off, on
426 // --------------------------------------------------------------------------------------