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#include <sndfile.h>
#include <iostream>
#include <cstring>
#include "pbd/error.h"
#include "ardour/sndfileimportable.h"
using namespace ARDOUR;
using namespace std;
/* FIXME: this was copied from sndfilesource.cc, at some point these should be merged */
int64_t
SndFileImportableSource::get_timecode_info (SNDFILE* sf, SF_BROADCAST_INFO* binfo, bool& exists)
{
if (sf_command (sf, SFC_GET_BROADCAST_INFO, binfo, sizeof (*binfo)) != SF_TRUE) {
exists = false;
return 0;
}
/* see http://tracker.ardour.org/view.php?id=6208
* 0xffffffff 0xfffc5680
* seems to be a bug in Presonus Capture (which generated the file)
*
* still since framepos_t is a signed int, ignore files that could
* lead to negative timestamps for now.
*/
if (binfo->time_reference_high & 0x80000000) {
char tmp[64];
snprintf(tmp, sizeof(tmp), "%x%08x", binfo->time_reference_high, binfo->time_reference_low);
PBD::warning << "Invalid Timestamp " << tmp << endmsg;
exists = false;
return 0;
}
exists = true;
/* libsndfile reads eactly 4 bytes for high and low, but
* uses "unsigned int" which may or may not be 32 bit little
* endian.
*/
int64_t ret = (uint32_t) (binfo->time_reference_high & 0x7fffffff);
ret <<= 32;
ret |= (uint32_t) (binfo->time_reference_low & 0xffffffff);
assert(ret >= 0);
return ret;
}
SndFileImportableSource::SndFileImportableSource (const string& path)
{
memset(&sf_info, 0 , sizeof(sf_info));
in.reset( sf_open(path.c_str(), SFM_READ, &sf_info), sf_close);
if (!in) throw failed_constructor();
SF_BROADCAST_INFO binfo;
bool timecode_exists;
memset (&binfo, 0, sizeof (binfo));
timecode = get_timecode_info (in.get(), &binfo, timecode_exists);
if (!timecode_exists) {
timecode = 0;
}
}
SndFileImportableSource::~SndFileImportableSource ()
{
}
framecnt_t
SndFileImportableSource::read (Sample* buffer, framecnt_t nframes)
{
framecnt_t per_channel = nframes / sf_info.channels;
per_channel = sf_readf_float (in.get(), buffer, per_channel);
return per_channel * sf_info.channels;
}
uint32_t
SndFileImportableSource::channels () const
{
return sf_info.channels;
}
framecnt_t
SndFileImportableSource::length () const
{
return (framecnt_t) sf_info.frames;
}
framecnt_t
SndFileImportableSource::samplerate () const
{
return sf_info.samplerate;
}
void
SndFileImportableSource::seek (framepos_t /*pos*/)
{
sf_seek (in.get(), 0, SEEK_SET);
}
framepos_t
SndFileImportableSource::natural_position () const
{
return (framepos_t) timecode;
}
bool
SndFileImportableSource::clamped_at_unity () const
{
int const type = sf_info.format & SF_FORMAT_TYPEMASK;
int const sub = sf_info.format & SF_FORMAT_SUBMASK;
/* XXX: this may not be the full list of formats that are unclamped */
return (sub != SF_FORMAT_FLOAT && sub != SF_FORMAT_DOUBLE && type != SF_FORMAT_OGG);
}
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