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extern/audaspace/src/util/BufferReader.cpp
- This file was added.
| /******************************************************************************* | |||||
| * Copyright 2009-2016 Jörg Müller | |||||
| * | |||||
| * Licensed under the Apache License, Version 2.0 (the "License"); | |||||
| * you may not use this file except in compliance with the License. | |||||
| * You may obtain a copy of the License at | |||||
| * | |||||
| * http://www.apache.org/licenses/LICENSE-2.0 | |||||
| * | |||||
| * Unless required by applicable law or agreed to in writing, software | |||||
| * distributed under the License is distributed on an "AS IS" BASIS, | |||||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |||||
| * See the License for the specific language governing permissions and | |||||
| * limitations under the License. | |||||
| ******************************************************************************/ | |||||
| #include "util/BufferReader.h" | |||||
| #include "util/Buffer.h" | |||||
| #include <cstring> | |||||
| AUD_NAMESPACE_BEGIN | |||||
| BufferReader::BufferReader(std::shared_ptr<Buffer> buffer, | |||||
| Specs specs) : | |||||
| m_position(0), m_buffer(buffer), m_specs(specs) | |||||
| { | |||||
| } | |||||
| bool BufferReader::isSeekable() const | |||||
| { | |||||
| return true; | |||||
| } | |||||
| void BufferReader::seek(int position) | |||||
| { | |||||
| m_position = position; | |||||
| } | |||||
| int BufferReader::getLength() const | |||||
| { | |||||
| return m_buffer->getSize() / AUD_SAMPLE_SIZE(m_specs); | |||||
| } | |||||
| int BufferReader::getPosition() const | |||||
| { | |||||
| return m_position; | |||||
| } | |||||
| Specs BufferReader::getSpecs() const | |||||
| { | |||||
| return m_specs; | |||||
| } | |||||
| void BufferReader::read(int& length, bool& eos, sample_t* buffer) | |||||
| { | |||||
| eos = false; | |||||
| int sample_size = AUD_SAMPLE_SIZE(m_specs); | |||||
| sample_t* buf = m_buffer->getBuffer() + m_position * m_specs.channels; | |||||
| // in case the end of the buffer is reached | |||||
| if(m_buffer->getSize() < (m_position + length) * sample_size) | |||||
| { | |||||
| length = m_buffer->getSize() / sample_size - m_position; | |||||
| eos = true; | |||||
| } | |||||
| if(length < 0) | |||||
| { | |||||
| length = 0; | |||||
| return; | |||||
| } | |||||
| m_position += length; | |||||
| std::memcpy(buffer, buf, length * sample_size); | |||||
| } | |||||
| AUD_NAMESPACE_END | |||||