148 lines
3.9 KiB
C++
148 lines
3.9 KiB
C++
/*
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* Copyright (C) 2008-2017 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2009-2011 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2009 David Robillard <d@drobilla.net>
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* Copyright (C) 2015 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <sndfile.h>
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#include <iostream>
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#include <cstring>
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#include <fcntl.h>
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#include <glib.h>
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#include "pbd/gstdio_compat.h"
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#include "pbd/error.h"
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#include "ardour/sndfileimportable.h"
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#include <glibmm/convert.h>
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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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/* see https://tracker.ardour.org/view.php?id=6208
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* 0xffffffff 0xfffc5680
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* seems to be a bug in Presonus Capture (which generated the file)
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*
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* still since samplepos_t is a signed int, ignore files that could
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* lead to negative timestamps for now.
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*/
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if (binfo->time_reference_high & 0x80000000) {
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char tmp[64];
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snprintf(tmp, sizeof(tmp), "%x%08x", binfo->time_reference_high, binfo->time_reference_low);
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PBD::warning << "Invalid Timestamp " << tmp << endmsg;
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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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/* libsndfile reads exactly 4 bytes for high and low, but
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* uses "unsigned int" which may or may not be 32 bit little
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* endian.
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*/
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int64_t ret = (uint32_t) (binfo->time_reference_high & 0x7fffffff);
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ret <<= 32;
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ret |= (uint32_t) (binfo->time_reference_low & 0xffffffff);
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assert(ret >= 0);
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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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int fd = g_open (path.c_str (), O_RDONLY, 0444);
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if (fd == -1) {
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throw failed_constructor ();
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}
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memset(&sf_info, 0 , sizeof(sf_info));
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in.reset (sf_open_fd (fd, SFM_READ, &sf_info, true), 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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samplecnt_t
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SndFileImportableSource::read (Sample* buffer, samplecnt_t nframes)
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{
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samplecnt_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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samplecnt_t
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SndFileImportableSource::length () const
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{
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return (samplecnt_t) sf_info.frames;
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}
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samplecnt_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 (samplepos_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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samplepos_t
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SndFileImportableSource::natural_position () const
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{
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return (samplepos_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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