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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 |
| (...skipping 18 matching lines...) Expand all Loading... |
| 29 #include "platform/audio/ReverbInputBuffer.h" | 29 #include "platform/audio/ReverbInputBuffer.h" |
| 30 | 30 |
| 31 namespace blink { | 31 namespace blink { |
| 32 | 32 |
| 33 ReverbInputBuffer::ReverbInputBuffer(size_t length) | 33 ReverbInputBuffer::ReverbInputBuffer(size_t length) |
| 34 : m_buffer(length), m_writeIndex(0) {} | 34 : m_buffer(length), m_writeIndex(0) {} |
| 35 | 35 |
| 36 void ReverbInputBuffer::write(const float* sourceP, size_t numberOfFrames) { | 36 void ReverbInputBuffer::write(const float* sourceP, size_t numberOfFrames) { |
| 37 size_t bufferLength = m_buffer.size(); | 37 size_t bufferLength = m_buffer.size(); |
| 38 bool isCopySafe = m_writeIndex + numberOfFrames <= bufferLength; | 38 bool isCopySafe = m_writeIndex + numberOfFrames <= bufferLength; |
| 39 ASSERT(isCopySafe); | 39 DCHECK(isCopySafe); |
| 40 if (!isCopySafe) | 40 if (!isCopySafe) |
| 41 return; | 41 return; |
| 42 | 42 |
| 43 memcpy(m_buffer.data() + m_writeIndex, sourceP, | 43 memcpy(m_buffer.data() + m_writeIndex, sourceP, |
| 44 sizeof(float) * numberOfFrames); | 44 sizeof(float) * numberOfFrames); |
| 45 | 45 |
| 46 m_writeIndex += numberOfFrames; | 46 m_writeIndex += numberOfFrames; |
| 47 ASSERT(m_writeIndex <= bufferLength); | 47 ASSERT(m_writeIndex <= bufferLength); |
| 48 | 48 |
| 49 if (m_writeIndex >= bufferLength) | 49 if (m_writeIndex >= bufferLength) |
| 50 m_writeIndex = 0; | 50 m_writeIndex = 0; |
| 51 } | 51 } |
| 52 | 52 |
| 53 float* ReverbInputBuffer::directReadFrom(int* readIndex, | 53 float* ReverbInputBuffer::directReadFrom(int* readIndex, |
| 54 size_t numberOfFrames) { | 54 size_t numberOfFrames) { |
| 55 size_t bufferLength = m_buffer.size(); | 55 size_t bufferLength = m_buffer.size(); |
| 56 bool isPointerGood = readIndex && *readIndex >= 0 && | 56 bool isPointerGood = readIndex && *readIndex >= 0 && |
| 57 *readIndex + numberOfFrames <= bufferLength; | 57 *readIndex + numberOfFrames <= bufferLength; |
| 58 ASSERT(isPointerGood); | 58 DCHECK(isPointerGood); |
| 59 if (!isPointerGood) { | 59 if (!isPointerGood) { |
| 60 // Should never happen in practice but return pointer to start of buffer | 60 // Should never happen in practice but return pointer to start of buffer |
| 61 // (avoid crash) | 61 // (avoid crash) |
| 62 if (readIndex) | 62 if (readIndex) |
| 63 *readIndex = 0; | 63 *readIndex = 0; |
| 64 return m_buffer.data(); | 64 return m_buffer.data(); |
| 65 } | 65 } |
| 66 | 66 |
| 67 float* sourceP = m_buffer.data(); | 67 float* sourceP = m_buffer.data(); |
| 68 float* p = sourceP + *readIndex; | 68 float* p = sourceP + *readIndex; |
| 69 | 69 |
| 70 // Update readIndex | 70 // Update readIndex |
| 71 *readIndex = (*readIndex + numberOfFrames) % bufferLength; | 71 *readIndex = (*readIndex + numberOfFrames) % bufferLength; |
| 72 | 72 |
| 73 return p; | 73 return p; |
| 74 } | 74 } |
| 75 | 75 |
| 76 void ReverbInputBuffer::reset() { | 76 void ReverbInputBuffer::reset() { |
| 77 m_buffer.zero(); | 77 m_buffer.zero(); |
| 78 m_writeIndex = 0; | 78 m_writeIndex = 0; |
| 79 } | 79 } |
| 80 | 80 |
| 81 } // namespace blink | 81 } // namespace blink |
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