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| 1 /* | 1 /* |
| 2 * Copyright (C) 2011 Google Inc. All rights reserved. | 2 * Copyright (C) 2011 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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| 149 | 149 |
| 150 // BufferSourceProvider is an AudioSourceProvider wrapping an in-memory buffer. | 150 // BufferSourceProvider is an AudioSourceProvider wrapping an in-memory buffer. |
| 151 | 151 |
| 152 class BufferSourceProvider final : public AudioSourceProvider { | 152 class BufferSourceProvider final : public AudioSourceProvider { |
| 153 public: | 153 public: |
| 154 BufferSourceProvider(const float* source, size_t numberOfSourceFrames) | 154 BufferSourceProvider(const float* source, size_t numberOfSourceFrames) |
| 155 : m_source(source), m_sourceFramesAvailable(numberOfSourceFrames) {} | 155 : m_source(source), m_sourceFramesAvailable(numberOfSourceFrames) {} |
| 156 | 156 |
| 157 // Consumes samples from the in-memory buffer. | 157 // Consumes samples from the in-memory buffer. |
| 158 void provideInput(AudioBus* bus, size_t framesToProcess) override { | 158 void provideInput(AudioBus* bus, size_t framesToProcess) override { |
| 159 ASSERT(m_source && bus); | 159 DCHECK(m_source); |
| 160 DCHECK(bus); |
| 160 if (!m_source || !bus) | 161 if (!m_source || !bus) |
| 161 return; | 162 return; |
| 162 | 163 |
| 163 float* buffer = bus->channel(0)->mutableData(); | 164 float* buffer = bus->channel(0)->mutableData(); |
| 164 | 165 |
| 165 // Clamp to number of frames available and zero-pad. | 166 // Clamp to number of frames available and zero-pad. |
| 166 size_t framesToCopy = std::min(m_sourceFramesAvailable, framesToProcess); | 167 size_t framesToCopy = std::min(m_sourceFramesAvailable, framesToProcess); |
| 167 memcpy(buffer, m_source, sizeof(float) * framesToCopy); | 168 memcpy(buffer, m_source, sizeof(float) * framesToCopy); |
| 168 | 169 |
| 169 // Zero-pad if necessary. | 170 // Zero-pad if necessary. |
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| 474 memcpy(r1, r3, sizeof(float) * (m_kernelSize / 2)); | 475 memcpy(r1, r3, sizeof(float) * (m_kernelSize / 2)); |
| 475 memcpy(r2, r4, sizeof(float) * (m_kernelSize / 2)); | 476 memcpy(r2, r4, sizeof(float) * (m_kernelSize / 2)); |
| 476 | 477 |
| 477 // Step (4) | 478 // Step (4) |
| 478 // Refresh the buffer with more input. | 479 // Refresh the buffer with more input. |
| 479 consumeSource(r5, m_blockSize); | 480 consumeSource(r5, m_blockSize); |
| 480 } | 481 } |
| 481 } | 482 } |
| 482 | 483 |
| 483 } // namespace blink | 484 } // namespace blink |
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