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48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
#include "libsndfile.hpp"
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#include <stdexcept>
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#include <sndfile.h>
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using namespace Mangle::Stream;
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static void fail(const std::string &msg)
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{ throw std::runtime_error("Mangle::libsndfile: " + msg); }
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using namespace Mangle::Sound;
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void SndFileSource::getInfo(int32_t *_rate, int32_t *_channels, int32_t *_bits)
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{
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*_rate = rate;
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*_channels = channels;
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*_bits = bits;
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}
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size_t SndFileSource::readSamples(void *data, size_t length)
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{
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// readf_* reads entire frames, including channels
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return sf_readf_short((SNDFILE*)handle, (short*)data, length);
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}
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SndFileSource::SndFileSource(const std::string &file)
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{
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SF_INFO info;
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info.format = 0;
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handle = sf_open(file.c_str(), SFM_READ, &info);
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if(handle == NULL)
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fail("Failed to open " + file);
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// I THINK that using sf_read_short forces the library to convert to
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// 16 bits no matter what, but the libsndfile docs aren't exactly
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// very clear on this point.
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channels = info.channels;
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rate = info.samplerate;
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bits = 16;
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// 16 bits per sample times number of channels
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setup(2*channels);
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}
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SndFileSource::~SndFileSource()
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{
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sf_close((SNDFILE*)handle);
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}
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