Index: third_party/WebKit/Source/platform/audio/PushPullFIFO.cpp |
diff --git a/third_party/WebKit/Source/platform/audio/PushPullFIFO.cpp b/third_party/WebKit/Source/platform/audio/PushPullFIFO.cpp |
deleted file mode 100644 |
index f464e9dc4a0ff24a610e4c5df8291ee5a87941ae..0000000000000000000000000000000000000000 |
--- a/third_party/WebKit/Source/platform/audio/PushPullFIFO.cpp |
+++ /dev/null |
@@ -1,145 +0,0 @@ |
-// Copyright 2017 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 "platform/audio/PushPullFIFO.h" |
- |
-#include <memory> |
-#include "platform/audio/AudioUtilities.h" |
-#include "wtf/PtrUtil.h" |
- |
-namespace blink { |
- |
-namespace { |
- |
-// Suppress the warning log if over/underflow happens more than 100 times. |
-const unsigned kMaxMessagesToLog = 100; |
-} |
- |
-const size_t PushPullFIFO::kMaxFIFOLength = 65536; |
- |
-PushPullFIFO::PushPullFIFO(unsigned numberOfChannels, size_t fifoLength) |
- : m_fifoLength(fifoLength), |
- m_framesAvailable(0), |
- m_indexRead(0), |
- m_indexWrite(0), |
- m_overflowCount(0), |
- m_underflowCount(0) { |
- CHECK_LE(m_fifoLength, kMaxFIFOLength); |
- m_fifoBus = AudioBus::create(numberOfChannels, m_fifoLength); |
-} |
- |
-PushPullFIFO::~PushPullFIFO() {} |
- |
-// Push the data from |inputBus| to FIFO. The size of push is determined by |
-// the length of |inputBus|. |
-void PushPullFIFO::push(const AudioBus* inputBus) { |
- CHECK(inputBus); |
- CHECK_EQ(inputBus->length(), AudioUtilities::kRenderQuantumFrames); |
- SECURITY_CHECK(inputBus->length() <= m_fifoLength); |
- SECURITY_CHECK(m_indexWrite < m_fifoLength); |
- |
- const size_t inputBusLength = inputBus->length(); |
- const size_t remainder = m_fifoLength - m_indexWrite; |
- |
- for (unsigned i = 0; i < m_fifoBus->numberOfChannels(); ++i) { |
- float* fifoBusChannel = m_fifoBus->channel(i)->mutableData(); |
- const float* inputBusChannel = inputBus->channel(i)->data(); |
- if (remainder >= inputBusLength) { |
- // The remainder is big enough for the input data. |
- memcpy(fifoBusChannel + m_indexWrite, inputBusChannel, |
- inputBusLength * sizeof(*fifoBusChannel)); |
- } else { |
- // The input data overflows the remainder size. Wrap around the index. |
- memcpy(fifoBusChannel + m_indexWrite, inputBusChannel, |
- remainder * sizeof(*fifoBusChannel)); |
- memcpy(fifoBusChannel, inputBusChannel + remainder, |
- (inputBusLength - remainder) * sizeof(*fifoBusChannel)); |
- } |
- } |
- |
- // Update the write index; wrap it around if necessary. |
- m_indexWrite = (m_indexWrite + inputBusLength) % m_fifoLength; |
- |
- // In case of overflow, move the |indexRead| to the updated |indexWrite| to |
- // avoid reading overwritten frames by the next pull. |
- if (inputBusLength > m_fifoLength - m_framesAvailable) { |
- m_indexRead = m_indexWrite; |
- if (++m_overflowCount < kMaxMessagesToLog) { |
- LOG(WARNING) << "PushPullFIFO: overflow while pushing (" |
- << "overflowCount=" << m_overflowCount |
- << ", availableFrames=" << m_framesAvailable |
- << ", inputFrames=" << inputBusLength |
- << ", fifoLength=" << m_fifoLength << ")"; |
- } |
- } |
- |
- // Update the number of frames available in FIFO. |
- m_framesAvailable = |
- std::min(m_framesAvailable + inputBusLength, m_fifoLength); |
- DCHECK_EQ((m_indexRead + m_framesAvailable) % m_fifoLength, m_indexWrite); |
-} |
- |
-// Pull the data out of FIFO to |outputBus|. If remaining frame in the FIFO |
-// is less than the frames to pull, provides remaining frame plus the silence. |
-void PushPullFIFO::pull(AudioBus* outputBus, size_t framesRequested) { |
- CHECK(outputBus); |
- SECURITY_CHECK(framesRequested <= outputBus->length()); |
- SECURITY_CHECK(framesRequested <= m_fifoLength); |
- SECURITY_CHECK(m_indexRead < m_fifoLength); |
- |
- const size_t remainder = m_fifoLength - m_indexRead; |
- const size_t framesToFill = std::min(m_framesAvailable, framesRequested); |
- |
- for (unsigned i = 0; i < m_fifoBus->numberOfChannels(); ++i) { |
- const float* fifoBusChannel = m_fifoBus->channel(i)->data(); |
- float* outputBusChannel = outputBus->channel(i)->mutableData(); |
- |
- // Fill up the output bus with the available frames first. |
- if (remainder >= framesToFill) { |
- // The remainder is big enough for the frames to pull. |
- memcpy(outputBusChannel, fifoBusChannel + m_indexRead, |
- framesToFill * sizeof(*fifoBusChannel)); |
- } else { |
- // The frames to pull is bigger than the remainder size. |
- // Wrap around the index. |
- memcpy(outputBusChannel, fifoBusChannel + m_indexRead, |
- remainder * sizeof(*fifoBusChannel)); |
- memcpy(outputBusChannel + remainder, fifoBusChannel, |
- (framesToFill - remainder) * sizeof(*fifoBusChannel)); |
- } |
- |
- // The frames available was not enough to fulfill the requested frames. Fill |
- // the rest of the channel with silence. |
- if (framesRequested > framesToFill) { |
- memset(outputBusChannel + framesToFill, 0, |
- (framesRequested - framesToFill) * sizeof(*outputBusChannel)); |
- } |
- } |
- |
- // Update the read index; wrap it around if necessary. |
- m_indexRead = (m_indexRead + framesToFill) % m_fifoLength; |
- |
- // In case of underflow, move the |indexWrite| to the updated |indexRead|. |
- if (framesRequested > framesToFill) { |
- m_indexWrite = m_indexRead; |
- if (m_underflowCount++ < kMaxMessagesToLog) { |
- LOG(WARNING) << "PushPullFIFO: underflow while pulling (" |
- << "underflowCount=" << m_underflowCount |
- << ", availableFrames=" << m_framesAvailable |
- << ", requestedFrames=" << framesRequested |
- << ", fifoLength=" << m_fifoLength << ")"; |
- } |
- } |
- |
- // Update the number of frames in FIFO. |
- m_framesAvailable -= framesToFill; |
- DCHECK_EQ((m_indexRead + m_framesAvailable) % m_fifoLength, m_indexWrite); |
-} |
- |
-const PushPullFIFOStateForTest PushPullFIFO::getStateForTest() const { |
- return {length(), numberOfChannels(), framesAvailable(), m_indexRead, |
- m_indexWrite, m_overflowCount, m_underflowCount}; |
-} |
- |
-} // namespace blink |