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| 1 /* | 1 /* |
| 2 * Copyright (C) 2010 Google Inc. All rights reserved. | 2 * Copyright (C) 2010 Google Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * | 7 * |
| 8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
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| 74 for (unsigned i = 0; i < numberOfOutputChannels; ++i) { | 74 for (unsigned i = 0; i < numberOfOutputChannels; ++i) { |
| 75 AudioNodeInput& input = this->input(i); | 75 AudioNodeInput& input = this->input(i); |
| 76 DCHECK_EQ(input.numberOfChannels(), 1u); | 76 DCHECK_EQ(input.numberOfChannels(), 1u); |
| 77 AudioChannel* outputChannel = output.bus()->channel(i); | 77 AudioChannel* outputChannel = output.bus()->channel(i); |
| 78 if (input.isConnected()) { | 78 if (input.isConnected()) { |
| 79 // The mixing rules will be applied so multiple channels are down- | 79 // The mixing rules will be applied so multiple channels are down- |
| 80 // mixed to mono (when the mixing rule is defined). Note that only | 80 // mixed to mono (when the mixing rule is defined). Note that only |
| 81 // the first channel will be taken for the undefined input channel | 81 // the first channel will be taken for the undefined input channel |
| 82 // layout. | 82 // layout. |
| 83 // | 83 // |
| 84 // See: http://webaudio.github.io/web-audio-api/#channel-up-mixing-and-dow
n-mixing | 84 // See: |
| 85 // http://webaudio.github.io/web-audio-api/#channel-up-mixing-and-down-mix
ing |
| 85 AudioChannel* inputChannel = input.bus()->channel(0); | 86 AudioChannel* inputChannel = input.bus()->channel(0); |
| 86 outputChannel->copyFrom(inputChannel); | 87 outputChannel->copyFrom(inputChannel); |
| 87 | 88 |
| 88 } else { | 89 } else { |
| 89 // If input is unconnected, fill zeros in the channel. | 90 // If input is unconnected, fill zeros in the channel. |
| 90 outputChannel->zero(); | 91 outputChannel->zero(); |
| 91 } | 92 } |
| 92 } | 93 } |
| 93 } | 94 } |
| 94 | 95 |
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| 168 | 169 |
| 169 if (!node) | 170 if (!node) |
| 170 return nullptr; | 171 return nullptr; |
| 171 | 172 |
| 172 node->handleChannelOptions(options, exceptionState); | 173 node->handleChannelOptions(options, exceptionState); |
| 173 | 174 |
| 174 return node; | 175 return node; |
| 175 } | 176 } |
| 176 | 177 |
| 177 } // namespace blink | 178 } // namespace blink |
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