blob: e8b6de19a2706082bba68a2c06aa84d32df137ac [file] [log] [blame]
/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/platform/audio/reverb_input_buffer.h"
namespace blink {
ReverbInputBuffer::ReverbInputBuffer(size_t length)
: buffer_(length), write_index_(0) {}
void ReverbInputBuffer::Write(const float* source_p, size_t number_of_frames) {
size_t buffer_length = buffer_.size();
size_t index = WriteIndex();
size_t new_index = index + number_of_frames;
CHECK_LE(new_index, buffer_length);
memcpy(buffer_.Data() + index, source_p, sizeof(float) * number_of_frames);
if (new_index >= buffer_length)
new_index = 0;
SetWriteIndex(new_index);
}
float* ReverbInputBuffer::DirectReadFrom(int* read_index,
size_t number_of_frames) {
size_t buffer_length = buffer_.size();
bool is_pointer_good = read_index && *read_index >= 0 &&
*read_index + number_of_frames <= buffer_length;
DCHECK(is_pointer_good);
if (!is_pointer_good) {
// Should never happen in practice but return pointer to start of buffer
// (avoid crash)
if (read_index)
*read_index = 0;
return buffer_.Data();
}
float* source_p = buffer_.Data();
float* p = source_p + *read_index;
// Update readIndex
*read_index = (*read_index + number_of_frames) % buffer_length;
return p;
}
void ReverbInputBuffer::Reset() {
buffer_.Zero();
write_index_ = 0;
}
} // namespace blink