diff options
Diffstat (limited to 'intern/audaspace/sndfile/AUD_SndFileReader.cpp')
| -rw-r--r-- | intern/audaspace/sndfile/AUD_SndFileReader.cpp | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/intern/audaspace/sndfile/AUD_SndFileReader.cpp b/intern/audaspace/sndfile/AUD_SndFileReader.cpp new file mode 100644 index 00000000000..485818552bb --- /dev/null +++ b/intern/audaspace/sndfile/AUD_SndFileReader.cpp @@ -0,0 +1,233 @@ +/* + * $Id$ + * + * ***** BEGIN LGPL LICENSE BLOCK ***** + * + * Copyright 2009 Jörg Hermann Müller + * + * This file is part of AudaSpace. + * + * AudaSpace is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * AudaSpace is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with AudaSpace. If not, see <http://www.gnu.org/licenses/>. + * + * ***** END LGPL LICENSE BLOCK ***** + */ + +#include "AUD_SndFileReader.h" +#include "AUD_Buffer.h" + +#include <cstring> + +// This function transforms a SampleFormat to our own sample format +static inline AUD_SampleFormat SNDFILE_TO_AUD(int fmt) +{ + switch(fmt & SF_FORMAT_SUBMASK) + { + // only read s16, s32 and double as they are + case SF_FORMAT_PCM_16: + return AUD_FORMAT_S16; + case SF_FORMAT_PCM_32: + return AUD_FORMAT_S32; + case SF_FORMAT_DOUBLE: + return AUD_FORMAT_FLOAT64; + // read all other formats as floats + default: + return AUD_FORMAT_FLOAT32; + } +} + +sf_count_t AUD_SndFileReader::vio_get_filelen(void *user_data) +{ + AUD_SndFileReader* reader = (AUD_SndFileReader*)user_data; + return reader->m_membuffer.get()->getSize(); +} + +sf_count_t AUD_SndFileReader::vio_seek(sf_count_t offset, int whence, void *user_data) +{ + AUD_SndFileReader* reader = (AUD_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.get()->getSize() + offset; + break; + } + + return reader->m_memoffset; +} + +sf_count_t AUD_SndFileReader::vio_read(void *ptr, sf_count_t count, void *user_data) +{ + AUD_SndFileReader* reader = (AUD_SndFileReader*)user_data; + + if(reader->m_memoffset + count > reader->m_membuffer.get()->getSize()) + count = reader->m_membuffer.get()->getSize() - reader->m_memoffset; + + memcpy(ptr, reader->m_membuffer.get()->getBuffer() + reader->m_memoffset, count); + reader->m_memoffset += count; + + return count; +} + +sf_count_t AUD_SndFileReader::vio_tell(void *user_data) +{ + AUD_SndFileReader* reader = (AUD_SndFileReader*)user_data; + + return reader->m_memoffset; +} + +AUD_SndFileReader::AUD_SndFileReader(const char* filename) +{ + SF_INFO sfinfo; + + sfinfo.format = 0; + m_sndfile = sf_open(filename, SFM_READ, &sfinfo); + + if(!m_sndfile) + AUD_THROW(AUD_ERROR_FILE); + + m_specs.channels = (AUD_Channels) sfinfo.channels; + m_specs.format = SNDFILE_TO_AUD(sfinfo.format); + m_specs.rate = (AUD_SampleRate) sfinfo.samplerate; + m_length = sfinfo.frames; + m_seekable = sfinfo.seekable; + m_position = 0; + + switch(m_specs.format) + { + case AUD_FORMAT_S16: + m_read = (sf_read_f) sf_readf_short; + break; + case AUD_FORMAT_S32: + m_read = (sf_read_f) sf_readf_int; + break; + case AUD_FORMAT_FLOAT64: + m_read = (sf_read_f) sf_readf_double; + break; + default: + m_read = (sf_read_f) sf_readf_float; + } + + m_buffer = new AUD_Buffer(); AUD_NEW("buffer") +} + +AUD_SndFileReader::AUD_SndFileReader(AUD_Reference<AUD_Buffer> buffer) +{ + 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 = NULL; + + SF_INFO sfinfo; + + sfinfo.format = 0; + m_sndfile = sf_open_virtual(&m_vio, SFM_READ, &sfinfo, this); + + if(!m_sndfile) + AUD_THROW(AUD_ERROR_FILE); + + m_specs.channels = (AUD_Channels) sfinfo.channels; + m_specs.format = SNDFILE_TO_AUD(sfinfo.format); + m_specs.rate = (AUD_SampleRate) sfinfo.samplerate; + m_length = sfinfo.frames; + m_seekable = sfinfo.seekable; + m_position = 0; + + switch(m_specs.format) + { + case AUD_FORMAT_S16: + m_read = (sf_read_f) sf_readf_short; + break; + case AUD_FORMAT_S32: + m_read = (sf_read_f) sf_readf_int; + break; + case AUD_FORMAT_FLOAT64: + m_read = (sf_read_f) sf_readf_double; + break; + default: + m_read = (sf_read_f) sf_readf_float; + } + + m_buffer = new AUD_Buffer(); AUD_NEW("buffer") +} + +AUD_SndFileReader::~AUD_SndFileReader() +{ + sf_close(m_sndfile); + + delete m_buffer; AUD_DELETE("buffer") +} + +bool AUD_SndFileReader::isSeekable() +{ + return m_seekable; +} + +void AUD_SndFileReader::seek(int position) +{ + if(m_seekable) + { + position = sf_seek(m_sndfile, position, SEEK_SET); + m_position = position; + } +} + +int AUD_SndFileReader::getLength() +{ + return m_length; +} + +int AUD_SndFileReader::getPosition() +{ + return m_position; +} + +AUD_Specs AUD_SndFileReader::getSpecs() +{ + return m_specs; +} + +AUD_ReaderType AUD_SndFileReader::getType() +{ + return AUD_TYPE_STREAM; +} + +bool AUD_SndFileReader::notify(AUD_Message &message) +{ + return false; +} + +void AUD_SndFileReader::read(int & length, sample_t* & buffer) +{ + int sample_size = AUD_SAMPLE_SIZE(m_specs); + + // resize output buffer if necessary + if(m_buffer->getSize() < length*sample_size) + m_buffer->resize(length*sample_size); + + buffer = m_buffer->getBuffer(); + + length = m_read(m_sndfile, buffer, length); + + m_position += length; +} |