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/*
* Copyright (C) 2008-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2009 David Robillard <d@drobilla.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "ardour/caimportable.h"
#include <sndfile.h>
#include "pbd/error.h"
#include "pbd/i18n.h"
using namespace ARDOUR;
using namespace std;
using namespace PBD;
CAImportableSource::CAImportableSource (const string& path)
{
try {
af.Open (path.c_str());
CAStreamBasicDescription file_format (af.GetFileDataFormat());
CAStreamBasicDescription client_format (file_format);
/* set canonial form (PCM, native float packed, 32 bit, with the correct number of channels
and interleaved (since we plan to deinterleave ourselves)
*/
client_format.SetCanonical(client_format.NumberChannels(), true);
af.SetClientFormat (client_format);
} catch (CAXException& cax) {
//Don't report an error here since there is one higher up in import.
//Since libsndfile gets tried second, any failures here may show as
//invalid errors in the Error log.
throw failed_constructor ();
}
}
CAImportableSource::~CAImportableSource ()
{
}
samplecnt_t
CAImportableSource::read (Sample* buffer, samplecnt_t nframes)
{
samplecnt_t nread = 0;
AudioBufferList abl;
samplecnt_t per_channel;
bool at_end = false;
abl.mNumberBuffers = 1;
abl.mBuffers[0].mNumberChannels = channels();
per_channel = nframes / abl.mBuffers[0].mNumberChannels;
while (nread < per_channel) {
UInt32 new_cnt = per_channel - nread;
abl.mBuffers[0].mDataByteSize = new_cnt * abl.mBuffers[0].mNumberChannels * sizeof(Sample);
abl.mBuffers[0].mData = buffer + nread;
try {
af.Read (new_cnt, &abl);
} catch (CAXException& cax) {
error << string_compose("CAImportable: %1", cax.mOperation);
return -1;
}
if (new_cnt == 0) {
/* EOF */
at_end = true;
break;
}
nread += new_cnt;
}
if (!at_end && nread < per_channel) {
return 0;
} else {
return nread * abl.mBuffers[0].mNumberChannels;
}
}
uint
CAImportableSource::channels () const
{
return af.GetFileDataFormat().NumberChannels();
}
samplecnt_t
CAImportableSource::length () const
{
return af.GetNumberFrames();
}
samplecnt_t
CAImportableSource::samplerate () const
{
CAStreamBasicDescription client_asbd;
try {
client_asbd = af.GetClientDataFormat ();
} catch (CAXException& cax) {
error << string_compose ("CAImportable: %1", cax.mOperation) << endmsg;
return 0.0;
}
return client_asbd.mSampleRate;
}
void
CAImportableSource::seek (samplepos_t pos)
{
try {
af.Seek (pos);
} catch (CAXException& cax) {
error << string_compose ("CAImportable: %1 to %2", cax.mOperation, pos) << endmsg;
}
}
samplepos_t
CAImportableSource::natural_position () const
{
// TODO: extract timecode, if any
return 0;
}
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