92 lines
2.1 KiB
C++
92 lines
2.1 KiB
C++
#include "ardour/sndfileimportable.h"
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#include <sndfile.h>
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#include <iostream>
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#include <cstring>
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using namespace ARDOUR;
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using namespace std;
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/* FIXME: this was copied from sndfilesource.cc, at some point these should be merged */
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int64_t
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SndFileImportableSource::get_timecode_info (SNDFILE* sf, SF_BROADCAST_INFO* binfo, bool& exists)
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{
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if (sf_command (sf, SFC_GET_BROADCAST_INFO, binfo, sizeof (*binfo)) != SF_TRUE) {
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exists = false;
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return 0;
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}
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exists = true;
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int64_t ret = (uint32_t) binfo->time_reference_high;
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ret <<= 32;
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ret |= (uint32_t) binfo->time_reference_low;
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return ret;
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}
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SndFileImportableSource::SndFileImportableSource (const string& path)
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{
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memset(&sf_info, 0 , sizeof(sf_info));
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in.reset( sf_open(path.c_str(), SFM_READ, &sf_info), sf_close);
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if (!in) throw failed_constructor();
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SF_BROADCAST_INFO binfo;
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bool timecode_exists;
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memset (&binfo, 0, sizeof (binfo));
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timecode = get_timecode_info (in.get(), &binfo, timecode_exists);
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if (!timecode_exists) {
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timecode = 0;
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}
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}
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SndFileImportableSource::~SndFileImportableSource ()
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{
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}
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framecnt_t
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SndFileImportableSource::read (Sample* buffer, framecnt_t nframes)
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{
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framecnt_t per_channel = nframes / sf_info.channels;
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per_channel = sf_readf_float (in.get(), buffer, per_channel);
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return per_channel * sf_info.channels;
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}
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uint32_t
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SndFileImportableSource::channels () const
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{
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return sf_info.channels;
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}
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framecnt_t
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SndFileImportableSource::length () const
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{
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return (framecnt_t) sf_info.frames;
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}
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framecnt_t
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SndFileImportableSource::samplerate () const
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{
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return sf_info.samplerate;
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}
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void
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SndFileImportableSource::seek (framepos_t /*pos*/)
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{
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sf_seek (in.get(), 0, SEEK_SET);
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}
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framepos_t
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SndFileImportableSource::natural_position () const
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{
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return (framepos_t) timecode;
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}
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bool
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SndFileImportableSource::clamped_at_unity () const
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{
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int const type = sf_info.format & SF_FORMAT_TYPEMASK;
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int const sub = sf_info.format & SF_FORMAT_SUBMASK;
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/* XXX: this may not be the full list of formats that are unclamped */
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return (sub != SF_FORMAT_FLOAT && sub != SF_FORMAT_DOUBLE && type != SF_FORMAT_OGG);
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}
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