Changeset View
Changeset View
Standalone View
Standalone View
extern/audaspace/src/sequence/SuperposeReader.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 "sequence/SuperposeReader.h" | |||||
| #include "Exception.h" | |||||
| #include <algorithm> | |||||
| #include <cstring> | |||||
| AUD_NAMESPACE_BEGIN | |||||
| SuperposeReader::SuperposeReader(std::shared_ptr<IReader> reader1, std::shared_ptr<IReader> reader2) : | |||||
| m_reader1(reader1), m_reader2(reader2) | |||||
| { | |||||
| } | |||||
| SuperposeReader::~SuperposeReader() | |||||
| { | |||||
| } | |||||
| bool SuperposeReader::isSeekable() const | |||||
| { | |||||
| return m_reader1->isSeekable() && m_reader2->isSeekable(); | |||||
| } | |||||
| void SuperposeReader::seek(int position) | |||||
| { | |||||
| m_reader1->seek(position); | |||||
| m_reader2->seek(position); | |||||
| } | |||||
| int SuperposeReader::getLength() const | |||||
| { | |||||
| int len1 = m_reader1->getLength(); | |||||
| int len2 = m_reader2->getLength(); | |||||
| if((len1 < 0) || (len2 < 0)) | |||||
| return -1; | |||||
| return std::min(len1, len2); | |||||
| } | |||||
| int SuperposeReader::getPosition() const | |||||
| { | |||||
| int pos1 = m_reader1->getPosition(); | |||||
| int pos2 = m_reader2->getPosition(); | |||||
| return std::max(pos1, pos2); | |||||
| } | |||||
| Specs SuperposeReader::getSpecs() const | |||||
| { | |||||
| return m_reader1->getSpecs(); | |||||
| } | |||||
| void SuperposeReader::read(int& length, bool& eos, sample_t* buffer) | |||||
| { | |||||
| Specs specs = m_reader1->getSpecs(); | |||||
| Specs s2 = m_reader2->getSpecs(); | |||||
| if(!AUD_COMPARE_SPECS(specs, s2)) | |||||
| AUD_THROW(StateException, "Two readers with different specifiactions cannot be superposed."); | |||||
| int samplesize = AUD_SAMPLE_SIZE(specs); | |||||
| m_buffer.assureSize(length * samplesize); | |||||
| int len1 = length; | |||||
| m_reader1->read(len1, eos, buffer); | |||||
| if(len1 < length) | |||||
| std::memset(buffer + len1 * specs.channels, 0, (length - len1) * samplesize); | |||||
| int len2 = length; | |||||
| bool eos2; | |||||
| sample_t* buf = m_buffer.getBuffer(); | |||||
| m_reader2->read(len2, eos2, buf); | |||||
| for(int i = 0; i < len2 * specs.channels; i++) | |||||
| buffer[i] += buf[i]; | |||||
| length = std::max(len1, len2); | |||||
| eos &= eos2; | |||||
| } | |||||
| AUD_NAMESPACE_END | |||||