| // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/basictypes.h" |
| #include "media/audio/audio_util.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| // Number of samples in each audio array. |
| static const size_t kNumberOfSamples = 4; |
| |
| namespace media { |
| |
| TEST(AudioUtilTest, AdjustVolume_u8) { |
| // Test AdjustVolume() on 8 bit samples. |
| uint8 samples_u8[kNumberOfSamples] = { 4, 0x40, 0x80, 0xff }; |
| uint8 expected_u8[kNumberOfSamples] = { (4 - 128) / 2 + 128, |
| (0x40 - 128) / 2 + 128, |
| (0x80 - 128) / 2 + 128, |
| (0xff - 128) / 2 + 128 }; |
| bool result_u8 = media::AdjustVolume(samples_u8, sizeof(samples_u8), |
| 1, // channels. |
| sizeof(samples_u8[0]), |
| 0.5f); |
| EXPECT_EQ(true, result_u8); |
| int expected_test = memcmp(samples_u8, expected_u8, sizeof(expected_u8)); |
| EXPECT_EQ(0, expected_test); |
| } |
| |
| TEST(AudioUtilTest, AdjustVolume_s16) { |
| // Test AdjustVolume() on 16 bit samples. |
| int16 samples_s16[kNumberOfSamples] = { -4, 0x40, -32768, 123 }; |
| int16 expected_s16[kNumberOfSamples] = { -1, 0x10, -8192, 30 }; |
| bool result_s16 = media::AdjustVolume(samples_s16, sizeof(samples_s16), |
| 2, // channels. |
| sizeof(samples_s16[0]), |
| 0.25f); |
| EXPECT_EQ(true, result_s16); |
| int expected_test = memcmp(samples_s16, expected_s16, sizeof(expected_s16)); |
| EXPECT_EQ(0, expected_test); |
| } |
| |
| TEST(AudioUtilTest, AdjustVolume_s16_zero) { |
| // Test AdjustVolume() on 16 bit samples. |
| int16 samples_s16[kNumberOfSamples] = { -4, 0x40, -32768, 123 }; |
| int16 expected_s16[kNumberOfSamples] = { 0, 0, 0, 0 }; |
| bool result_s16 = media::AdjustVolume(samples_s16, sizeof(samples_s16), |
| 2, // channels. |
| sizeof(samples_s16[0]), |
| 0.0f); |
| EXPECT_EQ(true, result_s16); |
| int expected_test = memcmp(samples_s16, expected_s16, sizeof(expected_s16)); |
| EXPECT_EQ(0, expected_test); |
| } |
| |
| TEST(AudioUtilTest, AdjustVolume_s16_one) { |
| // Test AdjustVolume() on 16 bit samples. |
| int16 samples_s16[kNumberOfSamples] = { -4, 0x40, -32768, 123 }; |
| int16 expected_s16[kNumberOfSamples] = { -4, 0x40, -32768, 123 }; |
| bool result_s16 = media::AdjustVolume(samples_s16, sizeof(samples_s16), |
| 2, // channels. |
| sizeof(samples_s16[0]), |
| 1.0f); |
| EXPECT_EQ(true, result_s16); |
| int expected_test = memcmp(samples_s16, expected_s16, sizeof(expected_s16)); |
| EXPECT_EQ(0, expected_test); |
| } |
| |
| TEST(AudioUtilTest, AdjustVolume_s32) { |
| // Test AdjustVolume() on 32 bit samples. |
| int32 samples_s32[kNumberOfSamples] = { -4, 0x40, -32768, 123 }; |
| int32 expected_s32[kNumberOfSamples] = { -1, 0x10, -8192, 30 }; |
| bool result_s32 = media::AdjustVolume(samples_s32, sizeof(samples_s32), |
| 4, // channels. |
| sizeof(samples_s32[0]), |
| 0.25f); |
| EXPECT_EQ(true, result_s32); |
| int expected_test = memcmp(samples_s32, expected_s32, sizeof(expected_s32)); |
| EXPECT_EQ(0, expected_test); |
| } |
| |
| TEST(AudioUtilTest, FoldChannels_u8) { |
| // Test FoldChannels() on 8 bit samples. |
| uint8 samples_u8[6] = { 100, 150, 130, 70, 130, 170 }; |
| uint8 expected_u8[2] = { static_cast<uint8>((130 - 128) * 0.707 + |
| (100 - 128) + 128), |
| static_cast<uint8>((130 - 128) * 0.707 + |
| (150 - 128) + 128) }; |
| bool result_u8 = media::FoldChannels(samples_u8, sizeof(samples_u8), |
| 6, // channels. |
| sizeof(samples_u8[0]), |
| 1.0f); |
| EXPECT_EQ(true, result_u8); |
| int expected_test = memcmp(samples_u8, expected_u8, sizeof(expected_u8)); |
| EXPECT_EQ(0, expected_test); |
| } |
| |
| TEST(AudioUtilTest, FoldChannels_s16) { |
| // Test FoldChannels() on 16 bit samples. |
| int16 samples_s16[6] = { 1, 3, 12, 7, 13, 17 }; |
| int16 expected_s16[2] = { static_cast<int16>(12 * .707 + 1), |
| static_cast<int16>(12 * .707 + 3) }; |
| bool result_s16 = media::FoldChannels(samples_s16, sizeof(samples_s16), |
| 6, // channels. |
| sizeof(samples_s16[0]), |
| 1.00f); |
| EXPECT_EQ(true, result_s16); |
| int expected_test = memcmp(samples_s16, expected_s16, sizeof(expected_s16)); |
| EXPECT_EQ(0, expected_test); |
| } |
| |
| TEST(AudioUtilTest, FoldChannels_s32) { |
| // Test FoldChannels() on 32 bit samples. |
| int32 samples_s32[6] = { 1, 3, 12, 7, 13, 17 }; |
| int32 expected_s32[2] = { static_cast<int16>(12 * .707 + 1), |
| static_cast<int16>(12 * .707 + 3) }; |
| bool result_s32 = media::FoldChannels(samples_s32, sizeof(samples_s32), |
| 6, // channels. |
| sizeof(samples_s32[0]), |
| 1.00f); |
| EXPECT_EQ(true, result_s32); |
| int expected_test = memcmp(samples_s32, expected_s32, sizeof(expected_s32)); |
| EXPECT_EQ(0, expected_test); |
| } |
| |
| // Fold 7.1 |
| TEST(AudioUtilTest, FoldChannels71_s16) { |
| // Test FoldChannels() on 16 bit samples. |
| int16 samples_s16[8] = { 1, 3, 12, 7, 13, 17, 30, 40 }; |
| int16 expected_s16[2] = { static_cast<int16>(12 * .707 + 1), |
| static_cast<int16>(12 * .707 + 3) }; |
| bool result_s16 = media::FoldChannels(samples_s16, sizeof(samples_s16), |
| 8, // channels. |
| sizeof(samples_s16[0]), |
| 1.00f); |
| EXPECT_EQ(true, result_s16); |
| int expected_test = memcmp(samples_s16, expected_s16, sizeof(expected_s16)); |
| EXPECT_EQ(0, expected_test); |
| } |
| |
| } // namespace media |