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| 1 /* | 1 /* |
| 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
| 5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
| 6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 | 10 |
| 11 #include "webrtc/modules/audio_conference_mixer/source/audio_frame_manipulator.h
" | 11 #include "webrtc/modules/audio_conference_mixer/source/audio_frame_manipulator.h
" |
| 12 #include "webrtc/modules/interface/module_common_types.h" | 12 #include "webrtc/modules/include/module_common_types.h" |
| 13 #include "webrtc/typedefs.h" | 13 #include "webrtc/typedefs.h" |
| 14 | 14 |
| 15 namespace { | 15 namespace { |
| 16 // Linear ramping over 80 samples. | 16 // Linear ramping over 80 samples. |
| 17 // TODO(hellner): ramp using fix point? | 17 // TODO(hellner): ramp using fix point? |
| 18 const float rampArray[] = {0.0000f, 0.0127f, 0.0253f, 0.0380f, | 18 const float rampArray[] = {0.0000f, 0.0127f, 0.0253f, 0.0380f, |
| 19 0.0506f, 0.0633f, 0.0759f, 0.0886f, | 19 0.0506f, 0.0633f, 0.0759f, 0.0886f, |
| 20 0.1013f, 0.1139f, 0.1266f, 0.1392f, | 20 0.1013f, 0.1139f, 0.1266f, 0.1392f, |
| 21 0.1519f, 0.1646f, 0.1772f, 0.1899f, | 21 0.1519f, 0.1646f, 0.1772f, 0.1899f, |
| 22 0.2025f, 0.2152f, 0.2278f, 0.2405f, | 22 0.2025f, 0.2152f, 0.2278f, 0.2405f, |
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| 68 { | 68 { |
| 69 const size_t rampPos = rampSize - 1 - i; | 69 const size_t rampPos = rampSize - 1 - i; |
| 70 audioFrame.data_[i] = static_cast<int16_t>(rampArray[rampPos] * | 70 audioFrame.data_[i] = static_cast<int16_t>(rampArray[rampPos] * |
| 71 audioFrame.data_[i]); | 71 audioFrame.data_[i]); |
| 72 } | 72 } |
| 73 memset(&audioFrame.data_[rampSize], 0, | 73 memset(&audioFrame.data_[rampSize], 0, |
| 74 (audioFrame.samples_per_channel_ - rampSize) * | 74 (audioFrame.samples_per_channel_ - rampSize) * |
| 75 sizeof(audioFrame.data_[0])); | 75 sizeof(audioFrame.data_[0])); |
| 76 } | 76 } |
| 77 } // namespace webrtc | 77 } // namespace webrtc |
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