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extern/audaspace/plugins/libsndfile/SndFileReader.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 "SndFileReader.h" | |||||
| #include "util/Buffer.h" | |||||
| #include "Exception.h" | |||||
| #include <cstring> | |||||
| AUD_NAMESPACE_BEGIN | |||||
| sf_count_t SndFileReader::vio_get_filelen(void* user_data) | |||||
| { | |||||
| SndFileReader* reader = (SndFileReader*)user_data; | |||||
| return reader->m_membuffer->getSize(); | |||||
| } | |||||
| sf_count_t SndFileReader::vio_seek(sf_count_t offset, int whence, | |||||
| void* user_data) | |||||
| { | |||||
| SndFileReader* reader = (SndFileReader*)user_data; | |||||
| switch(whence) | |||||
| { | |||||
| case SEEK_SET: | |||||
| reader->m_memoffset = offset; | |||||
| break; | |||||
| case SEEK_CUR: | |||||
| reader->m_memoffset = reader->m_memoffset + offset; | |||||
| break; | |||||
| case SEEK_END: | |||||
| reader->m_memoffset = reader->m_membuffer->getSize() + offset; | |||||
| break; | |||||
| } | |||||
| return reader->m_memoffset; | |||||
| } | |||||
| sf_count_t SndFileReader::vio_read(void* ptr, sf_count_t count, | |||||
| void* user_data) | |||||
| { | |||||
| SndFileReader* reader = (SndFileReader*)user_data; | |||||
| if(reader->m_memoffset + count > reader->m_membuffer->getSize()) | |||||
| count = reader->m_membuffer->getSize() - reader->m_memoffset; | |||||
| std::memcpy(ptr, ((data_t*)reader->m_membuffer->getBuffer()) + | |||||
| reader->m_memoffset, count); | |||||
| reader->m_memoffset += count; | |||||
| return count; | |||||
| } | |||||
| sf_count_t SndFileReader::vio_tell(void* user_data) | |||||
| { | |||||
| SndFileReader* reader = (SndFileReader*)user_data; | |||||
| return reader->m_memoffset; | |||||
| } | |||||
| SndFileReader::SndFileReader(std::string filename) : | |||||
| m_position(0) | |||||
| { | |||||
| SF_INFO sfinfo; | |||||
| sfinfo.format = 0; | |||||
| m_sndfile = sf_open(filename.c_str(), SFM_READ, &sfinfo); | |||||
| if(!m_sndfile) | |||||
| AUD_THROW(FileException, "The file couldn't be opened with libsndfile."); | |||||
| m_specs.channels = (Channels) sfinfo.channels; | |||||
| m_specs.rate = (SampleRate) sfinfo.samplerate; | |||||
| m_length = sfinfo.frames; | |||||
| m_seekable = sfinfo.seekable; | |||||
| } | |||||
| SndFileReader::SndFileReader(std::shared_ptr<Buffer> buffer) : | |||||
| m_position(0), | |||||
| m_membuffer(buffer), | |||||
| m_memoffset(0) | |||||
| { | |||||
| m_vio.get_filelen = vio_get_filelen; | |||||
| m_vio.read = vio_read; | |||||
| m_vio.seek = vio_seek; | |||||
| m_vio.tell = vio_tell; | |||||
| m_vio.write = nullptr; | |||||
| SF_INFO sfinfo; | |||||
| sfinfo.format = 0; | |||||
| m_sndfile = sf_open_virtual(&m_vio, SFM_READ, &sfinfo, this); | |||||
| if(!m_sndfile) | |||||
| AUD_THROW(FileException, "The buffer couldn't be read with libsndfile."); | |||||
| m_specs.channels = (Channels) sfinfo.channels; | |||||
| m_specs.rate = (SampleRate) sfinfo.samplerate; | |||||
| m_length = sfinfo.frames; | |||||
| m_seekable = sfinfo.seekable; | |||||
| } | |||||
| SndFileReader::~SndFileReader() | |||||
| { | |||||
| sf_close(m_sndfile); | |||||
| } | |||||
| bool SndFileReader::isSeekable() const | |||||
| { | |||||
| return m_seekable; | |||||
| } | |||||
| void SndFileReader::seek(int position) | |||||
| { | |||||
| if(m_seekable) | |||||
| { | |||||
| position = sf_seek(m_sndfile, position, SEEK_SET); | |||||
| m_position = position; | |||||
| } | |||||
| } | |||||
| int SndFileReader::getLength() const | |||||
| { | |||||
| return m_length; | |||||
| } | |||||
| int SndFileReader::getPosition() const | |||||
| { | |||||
| return m_position; | |||||
| } | |||||
| Specs SndFileReader::getSpecs() const | |||||
| { | |||||
| return m_specs; | |||||
| } | |||||
| void SndFileReader::read(int& length, bool& eos, sample_t* buffer) | |||||
| { | |||||
| int olen = length; | |||||
| length = sf_readf_float(m_sndfile, buffer, length); | |||||
| m_position += length; | |||||
| eos = length < olen; | |||||
| } | |||||
| AUD_NAMESPACE_END | |||||