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Diffstat (limited to 'extern/audaspace/src/util/StreamBuffer.cpp')
-rw-r--r-- | extern/audaspace/src/util/StreamBuffer.cpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/extern/audaspace/src/util/StreamBuffer.cpp b/extern/audaspace/src/util/StreamBuffer.cpp new file mode 100644 index 00000000000..b87b363377d --- /dev/null +++ b/extern/audaspace/src/util/StreamBuffer.cpp @@ -0,0 +1,83 @@ +/******************************************************************************* + * 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/StreamBuffer.h" +#include "util/BufferReader.h" +#include "util/Buffer.h" + +// 5 sec * 48000 samples/sec * 4 bytes/sample * 6 channels +#define BUFFER_RESIZE_BYTES 5760000 + +AUD_NAMESPACE_BEGIN + +StreamBuffer::StreamBuffer(std::shared_ptr<ISound> sound) : + m_buffer(new Buffer()) +{ + std::shared_ptr<IReader> reader = sound->createReader(); + + m_specs = reader->getSpecs(); + + int sample_size = AUD_SAMPLE_SIZE(m_specs); + int length; + int index = 0; + bool eos = false; + + // get an approximated size if possible + int size = reader->getLength(); + + if(size <= 0) + size = BUFFER_RESIZE_BYTES / sample_size; + else + size += m_specs.rate; + + // as long as the end of the stream is not reached + while(!eos) + { + // increase + m_buffer->resize(size*sample_size, true); + + // read more + length = size-index; + reader->read(length, eos, m_buffer->getBuffer() + index * m_specs.channels); + if(index == m_buffer->getSize() / sample_size) + size += BUFFER_RESIZE_BYTES / sample_size; + index += length; + } + + m_buffer->resize(index * sample_size, true); +} + +StreamBuffer::StreamBuffer(std::shared_ptr<Buffer> buffer, Specs specs) : + m_buffer(buffer), m_specs(specs) +{ +} + +std::shared_ptr<Buffer> StreamBuffer::getBuffer() +{ + return m_buffer; +} + +Specs StreamBuffer::getSpecs() +{ + return m_specs; +} + +std::shared_ptr<IReader> StreamBuffer::createReader() +{ + return std::shared_ptr<IReader>(new BufferReader(m_buffer, m_specs)); +} + +AUD_NAMESPACE_END |