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livetrax/libs/ardour/sndfilesource.cc

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/*
Copyright (C) 2006 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef WAF_BUILD
#include "libardour-config.h"
#endif
#include <cstring>
#include <cerrno>
#include <climits>
#include <cstdarg>
#include <fcntl.h>
#include <sys/stat.h>
#include <glib.h>
#include "pbd/gstdio_compat.h"
#include <glibmm/convert.h>
#include <glibmm/fileutils.h>
#include <glibmm/miscutils.h>
#include "ardour/runtime_functions.h"
#include "ardour/sndfilesource.h"
#include "ardour/sndfile_helpers.h"
#include "ardour/utils.h"
#include "ardour/session.h"
#include "pbd/i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
using std::string;
gain_t* SndFileSource::out_coefficient = 0;
gain_t* SndFileSource::in_coefficient = 0;
samplecnt_t SndFileSource::xfade_samples = 64;
const Source::Flag SndFileSource::default_writable_flags = Source::Flag (
Source::Writable |
Source::Removable |
Source::RemovableIfEmpty |
Source::CanRename );
SndFileSource::SndFileSource (Session& s, const XMLNode& node)
: Source(s, node)
, AudioFileSource (s, node)
, _sndfile (0)
, _broadcast_info (0)
, _capture_start (false)
, _capture_end (false)
, file_pos (0)
, xfade_buf (0)
{
init_sndfile ();
assert (Glib::file_test (_path, Glib::FILE_TEST_EXISTS));
existence_check ();
if (open()) {
throw failed_constructor ();
}
}
/** Constructor for existing external-to-session files.
Files created this way are never writable or removable
*/
SndFileSource::SndFileSource (Session& s, const string& path, int chn, Flag flags)
: Source(s, DataType::AUDIO, path, flags)
/* note that the origin of an external file is itself */
, AudioFileSource (s, path, Flag (flags & ~(Writable|Removable|RemovableIfEmpty|RemoveAtDestroy)))
, _sndfile (0)
, _broadcast_info (0)
, _capture_start (false)
, _capture_end (false)
, file_pos (0)
, xfade_buf (0)
{
_channel = chn;
init_sndfile ();
assert (Glib::file_test (_path, Glib::FILE_TEST_EXISTS));
existence_check ();
if (open()) {
throw failed_constructor ();
}
}
/** This constructor is used to construct new internal-to-session files,
not open existing ones.
*/
SndFileSource::SndFileSource (Session& s, const string& path, const string& origin,
SampleFormat sfmt, HeaderFormat hf, samplecnt_t rate, Flag flags)
: Source(s, DataType::AUDIO, path, flags)
, AudioFileSource (s, path, origin, flags, sfmt, hf)
, _sndfile (0)
, _broadcast_info (0)
, _capture_start (false)
, _capture_end (false)
, file_pos (0)
, xfade_buf (0)
{
int fmt = 0;
init_sndfile ();
assert (!Glib::file_test (_path, Glib::FILE_TEST_EXISTS));
existence_check ();
_file_is_new = true;
switch (hf) {
case CAF:
fmt = SF_FORMAT_CAF;
_flags = Flag (_flags & ~Broadcast);
break;
case FLAC:
fmt = SF_FORMAT_FLAC;
if (sfmt == FormatFloat) {
sfmt = FormatInt24;
}
_flags = Flag (_flags & ~Broadcast);
_flags = Flag (_flags & ~Destructive); // XXX or force WAV if destructive?
break;
case AIFF:
fmt = SF_FORMAT_AIFF;
_flags = Flag (_flags & ~Broadcast);
break;
case BWF:
fmt = SF_FORMAT_WAV;
_flags = Flag (_flags | Broadcast);
break;
case WAVE:
fmt = SF_FORMAT_WAV;
_flags = Flag (_flags & ~Broadcast);
break;
case WAVE64:
fmt = SF_FORMAT_W64;
_flags = Flag (_flags & ~Broadcast);
break;
case RF64_WAV:
fmt = SF_FORMAT_RF64;
_flags = Flag (_flags & ~Broadcast);
_flags = Flag (_flags | RF64_RIFF);
break;
case MBWF:
fmt = SF_FORMAT_RF64;
_flags = Flag (_flags | Broadcast);
_flags = Flag (_flags | RF64_RIFF);
break;
case RF64:
fmt = SF_FORMAT_RF64;
_flags = Flag (_flags & ~Broadcast);
break;
default:
fatal << string_compose (_("programming error: %1"), X_("unsupported audio header format requested")) << endmsg;
abort(); /*NOTREACHED*/
break;
}
switch (sfmt) {
case FormatFloat:
fmt |= SF_FORMAT_FLOAT;
break;
case FormatInt24:
fmt |= SF_FORMAT_PCM_24;
break;
case FormatInt16:
fmt |= SF_FORMAT_PCM_16;
break;
}
_info.channels = 1;
_info.samplerate = rate;
_info.format = fmt;
if (_flags & Destructive) {
if (open()) {
throw failed_constructor();
}
} else {
/* normal mode: do not open the file here - do that in {read,write}_unlocked() as needed
*/
}
}
/** Constructor to be called for recovering files being used for
* capture. They are in-session, they already exist, they should not
* be writable. They are an odd hybrid (from a constructor point of
* view) of the previous two constructors.
*/
SndFileSource::SndFileSource (Session& s, const string& path, int chn)
: Source (s, DataType::AUDIO, path, Flag (0))
/* the final boolean argument is not used, its value is irrelevant. see audiofilesource.h for explanation */
, AudioFileSource (s, path, Flag (0))
, _sndfile (0)
, _broadcast_info (0)
, _capture_start (false)
, _capture_end (false)
, file_pos (0)
, xfade_buf (0)
{
_channel = chn;
init_sndfile ();
assert (Glib::file_test (_path, Glib::FILE_TEST_EXISTS));
existence_check ();
if (open()) {
throw failed_constructor ();
}
}
/** Constructor to losslessly compress existing source to flac */
SndFileSource::SndFileSource (Session& s, const AudioFileSource& other, const string& path, bool use16bits, Progress* progress)
: Source(s, DataType::AUDIO, path, Flag ((other.flags () | default_writable_flags | NoPeakFile) & ~RF64_RIFF))
, AudioFileSource (s, path, "", Flag ((other.flags () | default_writable_flags | NoPeakFile) & ~RF64_RIFF), /*unused*/ FormatFloat, /*unused*/ WAVE64)
, _sndfile (0)
, _broadcast_info (0)
, _capture_start (false)
, _capture_end (false)
, file_pos (0)
, xfade_buf (0)
{
if (other.readable_length () == 0) {
throw failed_constructor();
}
assert (!Glib::file_test (_path, Glib::FILE_TEST_EXISTS));
_channel = 0;
init_sndfile ();
_file_is_new = true;
_info.channels = 1;
_info.samplerate = other.sample_rate ();
_info.format = SF_FORMAT_FLAC | (use16bits ? SF_FORMAT_PCM_16 : SF_FORMAT_PCM_24);
/* flac is either read or write -- never both,
* so we need to special-case ::open () */
#ifdef PLATFORM_WINDOWS
int fd = g_open (_path.c_str(), O_CREAT | O_RDWR, 0644);
#else
int fd = ::open (_path.c_str(), O_CREAT | O_RDWR, 0644);
#endif
if (fd == -1) {
throw failed_constructor();
}
_sndfile = sf_open_fd (fd, SFM_WRITE, &_info, true);
if (_sndfile == 0) {
throw failed_constructor();
}
#if 0
/* setting flac compression quality above the default does not produce a significant size
* improvement (not for large raw recordings anyway, the_CLA tests 2017-10-02, >> 250MB files,
* ~1% smaller), but does have a significant encoding speed penalty.
*
* We still may expose this as option someday though, perhaps for opposite reason: "fast encoding"
*/
double flac_quality = 1; // libsndfile uses range 0..1 (mapped to flac 0..8), default is (5/8)
if (sf_command (_sndfile, SFC_SET_COMPRESSION_LEVEL, &flac_quality, sizeof (double)) != SF_TRUE) {
char errbuf[256];
sf_error_str (_sndfile, errbuf, sizeof (errbuf) - 1);
error << string_compose (_("Cannot set flac compression level: %1"), errbuf) << endmsg;
}
#endif
Sample buf[8192];
samplecnt_t off = 0;
float peak = 0;
float norm = 1.f;
/* normalize before converting to fixed point, calc gain factor */
samplecnt_t len = other.read (buf, off, 8192, other.channel ());
while (len > 0) {
peak = compute_peak (buf, len, peak);
off += len;
len = other.read (buf, off, 8192, other.channel ());
if (progress) {
progress->set_progress (0.5f * (float) off / other.readable_length ());
}
}
if (peak > 0) {
_gain *= peak;
norm = 1.f / peak;
}
/* copy file */
off = 0;
len = other.read (buf, off, 8192, other.channel ());
while (len > 0) {
if (norm != 1.f) {
for (samplecnt_t i = 0; i < len; ++i) {
buf[i] *= norm;
}
}
write (buf, len);
off += len;
len = other.read (buf, off, 8192, other.channel ());
if (progress) {
progress->set_progress (0.5f + 0.5f * (float) off / other.readable_length ());
}
}
}
void
SndFileSource::init_sndfile ()
{
/* although libsndfile says we don't need to set this,
valgrind and source code shows us that we do.
*/
memset (&_info, 0, sizeof(_info));
if (destructive()) {
xfade_buf = new Sample[xfade_samples];
_timeline_position = header_position_offset;
}
AudioFileSource::HeaderPositionOffsetChanged.connect_same_thread (header_position_connection, boost::bind (&SndFileSource::handle_header_position_change, this));
}
void
SndFileSource::close ()
{
if (_sndfile) {
sf_close (_sndfile);
_sndfile = 0;
file_closed ();
}
}
int
SndFileSource::open ()
{
if (_sndfile) {
return 0;
}
// We really only want to use g_open for all platforms but because of this
// method(SndfileSource::open), the compiler(or at least GCC) is confused
// because g_open will expand to "open" on non-POSIX systems and needs the
// global namespace qualifer. The problem is since since C99 ::g_open will
// apparently expand to ":: open"
#ifdef PLATFORM_WINDOWS
int fd = g_open (_path.c_str(), writable() ? O_CREAT | O_RDWR : O_RDONLY, writable() ? 0644 : 0444);
#else
int fd = ::open (_path.c_str(), writable() ? O_CREAT | O_RDWR : O_RDONLY, writable() ? 0644 : 0444);
#endif
if (fd == -1) {
error << string_compose (
_ ("SndFileSource: cannot open file \"%1\" for %2"),
_path,
(writable () ? "read+write" : "reading")) << endmsg;
return -1;
}
if ((_info.format & SF_FORMAT_TYPEMASK ) == SF_FORMAT_FLAC) {
assert (!destructive());
_sndfile = sf_open_fd (fd, writable () ? SFM_WRITE : SFM_READ, &_info, true);
} else {
_sndfile = sf_open_fd (fd, writable() ? SFM_RDWR : SFM_READ, &_info, true);
}
if (_sndfile == 0) {
char errbuf[1024];
sf_error_str (0, errbuf, sizeof (errbuf) - 1);
#ifndef HAVE_COREAUDIO
/* if we have CoreAudio, we will be falling back to that if libsndfile fails,
so we don't want to see this message.
*/
cerr << "failed to open " << _path << " with name " << _name << endl;
error << string_compose(_("SndFileSource: cannot open file \"%1\" for %2 (%3)"),
_path, (writable() ? "read+write" : "reading"), errbuf) << endmsg;
#endif
return -1;
}
if (_channel >= _info.channels) {
#ifndef HAVE_COREAUDIO
error << string_compose(_("SndFileSource: file only contains %1 channels; %2 is invalid as a channel number"), _info.channels, _channel) << endmsg;
#endif
sf_close (_sndfile);
_sndfile = 0;
return -1;
}
_length = _info.frames;
#ifdef HAVE_RF64_RIFF
if (_file_is_new && _length == 0 && writable()) {
if (_flags & RF64_RIFF) {
if (sf_command (_sndfile, SFC_RF64_AUTO_DOWNGRADE, 0, 0) != SF_TRUE) {
char errbuf[256];
sf_error_str (_sndfile, errbuf, sizeof (errbuf) - 1);
error << string_compose (_("Cannot mark RF64 audio file for automatic downgrade to WAV: %1"), errbuf)
<< endmsg;
}
}
}
#endif
if (!_broadcast_info) {
_broadcast_info = new BroadcastInfo;
}
bool bwf_info_exists = _broadcast_info->load_from_file (_sndfile);
if (_file_is_new && _length == 0 && writable() && !bwf_info_exists) {
/* newly created files will not have a BWF header at this point in time.
* Import will have called Source::set_timeline_position() if one exists
* in the original. */
header_position_offset = _timeline_position;
}
/* Set our timeline position to either the time reference from a BWF header or the current
start of the session.
*/
set_timeline_position (bwf_info_exists ? _broadcast_info->get_time_reference() : header_position_offset);
if (_length != 0 && !bwf_info_exists) {
delete _broadcast_info;
_broadcast_info = 0;
_flags = Flag (_flags & ~Broadcast);
}
/* Set the broadcast flag if the BWF info is already there. We need
* this when recovering or using existing files.
*/
if (bwf_info_exists) {
_flags = Flag (_flags | Broadcast);
}
if (writable()) {
sf_command (_sndfile, SFC_SET_UPDATE_HEADER_AUTO, 0, SF_FALSE);
if (_flags & Broadcast) {
if (!_broadcast_info) {
_broadcast_info = new BroadcastInfo;
}
_broadcast_info->set_from_session (_session, header_position_offset);
_broadcast_info->set_description (string_compose ("BWF %1", _name));
if (!_broadcast_info->write_to_file (_sndfile)) {
error << string_compose (_("cannot set broadcast info for audio file %1 (%2); dropping broadcast info for this file"),
_path, _broadcast_info->get_error())
<< endmsg;
_flags = Flag (_flags & ~Broadcast);
delete _broadcast_info;
_broadcast_info = 0;
}
}
}
return 0;
}
SndFileSource::~SndFileSource ()
{
close ();
delete _broadcast_info;
delete [] xfade_buf;
}
float
SndFileSource::sample_rate () const
{
return _info.samplerate;
}
samplecnt_t
SndFileSource::read_unlocked (Sample *dst, samplepos_t start, samplecnt_t cnt) const
{
assert (cnt >= 0);
samplecnt_t nread;
float *ptr;
samplecnt_t real_cnt;
samplepos_t file_cnt;
if (writable() && !_sndfile) {
/* file has not been opened yet - nothing written to it */
memset (dst, 0, sizeof (Sample) * cnt);
return cnt;
}
if (const_cast<SndFileSource*>(this)->open()) {
error << string_compose (_("could not open file %1 for reading."), _path) << endmsg;
return 0;
}
if (start > _length) {
/* read starts beyond end of data, just memset to zero */
file_cnt = 0;
} else if (start + cnt > _length) {
/* read ends beyond end of data, read some, memset the rest */
file_cnt = _length - start;
} else {
/* read is entirely within data */
file_cnt = cnt;
}
assert (file_cnt >= 0);
if (file_cnt != cnt) {
samplepos_t delta = cnt - file_cnt;
memset (dst+file_cnt, 0, sizeof (Sample) * delta);
}
if (file_cnt) {
if (sf_seek (_sndfile, (sf_count_t) start, SEEK_SET|SFM_READ) != (sf_count_t) start) {
char errbuf[256];
sf_error_str (0, errbuf, sizeof (errbuf) - 1);
error << string_compose(_("SndFileSource: could not seek to sample %1 within %2 (%3)"), start, _name.val().substr (1), errbuf) << endmsg;
return 0;
}
if (_info.channels == 1) {
samplecnt_t ret = sf_read_float (_sndfile, dst, file_cnt);
if (ret != file_cnt) {
char errbuf[256];
sf_error_str (0, errbuf, sizeof (errbuf) - 1);
error << string_compose(_("SndFileSource: @ %1 could not read %2 within %3 (%4) (len = %5, ret was %6)"), start, file_cnt, _name.val().substr (1), errbuf, _length, ret) << endl;
}
if (_gain != 1.f) {
for (samplecnt_t i = 0; i < ret; ++i) {
dst[i] *= _gain;
}
}
return ret;
}
}
real_cnt = cnt * _info.channels;
Sample* interleave_buf = get_interleave_buffer (real_cnt);
nread = sf_read_float (_sndfile, interleave_buf, real_cnt);
ptr = interleave_buf + _channel;
nread /= _info.channels;
/* stride through the interleaved data */
if (_gain != 1.f) {
for (samplecnt_t n = 0; n < nread; ++n) {
dst[n] = *ptr * _gain;
ptr += _info.channels;
}
} else {
for (samplecnt_t n = 0; n < nread; ++n) {
dst[n] = *ptr;
ptr += _info.channels;
}
}
return nread;
}
samplecnt_t
SndFileSource::write_unlocked (Sample *data, samplecnt_t cnt)
{
if (open()) {
return 0; // failure
}
if (destructive()) {
return destructive_write_unlocked (data, cnt);
} else {
return nondestructive_write_unlocked (data, cnt);
}
}
samplecnt_t
SndFileSource::nondestructive_write_unlocked (Sample *data, samplecnt_t cnt)
{
if (!writable()) {
warning << string_compose (_("attempt to write a non-writable audio file source (%1)"), _path) << endmsg;
return 0;
}
if (_info.channels != 1) {
fatal << string_compose (_("programming error: %1 %2"), X_("SndFileSource::write called on non-mono file"), _path) << endmsg;
abort(); /*NOTREACHED*/
return 0;
}
samplepos_t sample_pos = _length;
if (write_float (data, sample_pos, cnt) != cnt) {
return 0;
}
update_length (_length + cnt);
if (_build_peakfiles) {
compute_and_write_peaks (data, sample_pos, cnt, true, true);
}
return cnt;
}
samplecnt_t
SndFileSource::destructive_write_unlocked (Sample* data, samplecnt_t cnt)
{
if (!writable()) {
warning << string_compose (_("attempt to write a non-writable audio file source (%1)"), _path) << endmsg;
return 0;
}
if (_capture_start && _capture_end) {
/* start and end of capture both occur within the data we are writing,
so do both crossfades.
*/
_capture_start = false;
_capture_end = false;
/* move to the correct location place */
file_pos = capture_start_sample - _timeline_position;
// split cnt in half
samplecnt_t subcnt = cnt / 2;
samplecnt_t ofilepos = file_pos;
// fade in
if (crossfade (data, subcnt, 1) != subcnt) {
return 0;
}
file_pos += subcnt;
Sample * tmpdata = data + subcnt;
// fade out
subcnt = cnt - subcnt;
if (crossfade (tmpdata, subcnt, 0) != subcnt) {
return 0;
}
file_pos = ofilepos; // adjusted below
} else if (_capture_start) {
/* start of capture both occur within the data we are writing,
so do the fade in
*/
_capture_start = false;
_capture_end = false;
/* move to the correct location place */
file_pos = capture_start_sample - _timeline_position;
if (crossfade (data, cnt, 1) != cnt) {
return 0;
}
} else if (_capture_end) {
/* end of capture both occur within the data we are writing,
so do the fade out
*/
_capture_start = false;
_capture_end = false;
if (crossfade (data, cnt, 0) != cnt) {
return 0;
}
} else {
/* in the middle of recording */
if (write_float (data, file_pos, cnt) != cnt) {
return 0;
}
}
update_length (file_pos + cnt);
if (_build_peakfiles) {
compute_and_write_peaks (data, file_pos, cnt, true, true);
}
file_pos += cnt;
return cnt;
}
int
SndFileSource::update_header (samplepos_t when, struct tm& now, time_t tnow)
{
set_timeline_position (when);
if (_flags & Broadcast) {
if (setup_broadcast_info (when, now, tnow)) {
return -1;
}
}
return flush_header ();
}
int
SndFileSource::flush_header ()
{
if (!writable()) {
warning << string_compose (_("attempt to flush a non-writable audio file source (%1)"), _path) << endmsg;
return -1;
}
if (_sndfile == 0) {
error << string_compose (_("could not allocate file %1 to write header"), _path) << endmsg;
return -1;
}
int const r = sf_command (_sndfile, SFC_UPDATE_HEADER_NOW, 0, 0) != SF_TRUE;
return r;
}
void
SndFileSource::flush ()
{
if (!writable()) {
warning << string_compose (_("attempt to flush a non-writable audio file source (%1)"), _path) << endmsg;
return;
}
if (_sndfile == 0) {
error << string_compose (_("could not allocate file %1 to flush contents"), _path) << endmsg;
return;
}
// Hopefully everything OK
sf_write_sync (_sndfile);
}
int
SndFileSource::setup_broadcast_info (samplepos_t /*when*/, struct tm& now, time_t /*tnow*/)
{
if (!writable()) {
warning << string_compose (_("attempt to store broadcast info in a non-writable audio file source (%1)"), _path) << endmsg;
return -1;
}
if (!_sndfile) {
warning << string_compose (_("attempt to set BWF info for an un-opened audio file source (%1)"), _path) << endmsg;
return -1;
}
if (!(_flags & Broadcast) || !_broadcast_info) {
return 0;
}
_broadcast_info->set_originator_ref_from_session (_session);
_broadcast_info->set_origination_time (&now);
/* now update header position taking header offset into account */
set_header_timeline_position ();
return 0;
}
void
SndFileSource::set_header_timeline_position ()
{
if (!(_flags & Broadcast)) {
return;
}
assert (_broadcast_info);
_broadcast_info->set_time_reference (_timeline_position);
if (_sndfile == 0 || !_broadcast_info->write_to_file (_sndfile)) {
error << string_compose (_("cannot set broadcast info for audio file %1 (%2); dropping broadcast info for this file"),
_path, _broadcast_info->get_error())
<< endmsg;
_flags = Flag (_flags & ~Broadcast);
delete _broadcast_info;
_broadcast_info = 0;
}
}
samplecnt_t
SndFileSource::write_float (Sample* data, samplepos_t sample_pos, samplecnt_t cnt)
{
if ((_info.format & SF_FORMAT_TYPEMASK ) == SF_FORMAT_FLAC) {
assert (_length == sample_pos);
}
else if (_sndfile == 0 || sf_seek (_sndfile, sample_pos, SEEK_SET|SFM_WRITE) < 0) {
char errbuf[256];
sf_error_str (0, errbuf, sizeof (errbuf) - 1);
error << string_compose (_("%1: cannot seek to %2 (libsndfile error: %3)"), _path, sample_pos, errbuf) << endmsg;
return 0;
}
if (sf_writef_float (_sndfile, data, cnt) != (ssize_t) cnt) {
return 0;
}
return cnt;
}
samplepos_t
SndFileSource::natural_position() const
{
return _timeline_position;
}
void
SndFileSource::clear_capture_marks ()
{
_capture_start = false;
_capture_end = false;
}
/** @param pos Capture start position in session samples */
void
SndFileSource::mark_capture_start (samplepos_t pos)
{
if (destructive()) {
if (pos < _timeline_position) {
_capture_start = false;
} else {
_capture_start = true;
capture_start_sample = pos;
}
}
}
void
SndFileSource::mark_capture_end()
{
if (destructive()) {
_capture_end = true;
}
}
samplecnt_t
SndFileSource::crossfade (Sample* data, samplecnt_t cnt, int fade_in)
{
samplecnt_t xfade = min (xfade_samples, cnt);
samplecnt_t nofade = cnt - xfade;
Sample* fade_data = 0;
samplepos_t fade_position = 0; // in samples
ssize_t retval;
samplecnt_t file_cnt;
if (fade_in) {
fade_position = file_pos;
fade_data = data;
} else {
fade_position = file_pos + nofade;
fade_data = data + nofade;
}
if (fade_position > _length) {
/* read starts beyond end of data, just memset to zero */
file_cnt = 0;
} else if (fade_position + xfade > _length) {
/* read ends beyond end of data, read some, memset the rest */
file_cnt = _length - fade_position;
} else {
/* read is entirely within data */
file_cnt = xfade;
}
if (file_cnt) {
if ((retval = read_unlocked (xfade_buf, fade_position, file_cnt)) != (ssize_t) file_cnt) {
if (retval >= 0 && errno == EAGAIN) {
/* XXX - can we really trust that errno is meaningful here? yes POSIX, i'm talking to you.
* short or no data there */
memset (xfade_buf, 0, xfade * sizeof(Sample));
} else {
error << string_compose(_("SndFileSource: \"%1\" bad read retval: %2 of %5 (%3: %4)"), _path, retval, errno, strerror (errno), xfade) << endmsg;
return 0;
}
}
}
if (file_cnt != xfade) {
samplecnt_t delta = xfade - file_cnt;
memset (xfade_buf+file_cnt, 0, sizeof (Sample) * delta);
}
if (nofade && !fade_in) {
if (write_float (data, file_pos, nofade) != nofade) {
error << string_compose(_("SndFileSource: \"%1\" bad write (%2)"), _path, strerror (errno)) << endmsg;
return 0;
}
}
if (xfade == xfade_samples) {
samplecnt_t n;
/* use the standard xfade curve */
if (fade_in) {
/* fade new material in */
for (n = 0; n < xfade; ++n) {
xfade_buf[n] = (xfade_buf[n] * out_coefficient[n]) + (fade_data[n] * in_coefficient[n]);
}
} else {
/* fade new material out */
for (n = 0; n < xfade; ++n) {
xfade_buf[n] = (xfade_buf[n] * in_coefficient[n]) + (fade_data[n] * out_coefficient[n]);
}
}
} else if (xfade < xfade_samples) {
std::vector<gain_t> in(xfade);
std::vector<gain_t> out(xfade);
/* short xfade, compute custom curve */
compute_equal_power_fades (xfade, &in[0], &out[0]);
for (samplecnt_t n = 0; n < xfade; ++n) {
xfade_buf[n] = (xfade_buf[n] * out[n]) + (fade_data[n] * in[n]);
}
} else if (xfade) {
/* long xfade length, has to be computed across several calls */
}
if (xfade) {
if (write_float (xfade_buf, fade_position, xfade) != xfade) {
error << string_compose(_("SndFileSource: \"%1\" bad write (%2)"), _path, strerror (errno)) << endmsg;
return 0;
}
}
if (fade_in && nofade) {
if (write_float (data + xfade, file_pos + xfade, nofade) != nofade) {
error << string_compose(_("SndFileSource: \"%1\" bad write (%2)"), _path, strerror (errno)) << endmsg;
return 0;
}
}
return cnt;
}
samplepos_t
SndFileSource::last_capture_start_sample () const
{
if (destructive()) {
return capture_start_sample;
} else {
return 0;
}
}
void
SndFileSource::handle_header_position_change ()
{
if (destructive()) {
if ( _length != 0 ) {
error << string_compose(_("Filesource: start time is already set for existing file (%1): Cannot change start time."), _path ) << endmsg;
//in the future, pop up a dialog here that allows user to regenerate file with new start offset
} else if (writable()) {
_timeline_position = header_position_offset;
set_header_timeline_position (); //this will get flushed if/when the file is recorded to
}
}
}
void
SndFileSource::setup_standard_crossfades (Session const & s, samplecnt_t rate)
{
/* This static method is assumed to have been called by the Session
before any DFS's are created.
*/
xfade_samples = (samplecnt_t) floor ((s.config.get_destructive_xfade_msecs () / 1000.0) * rate);
delete [] out_coefficient;
delete [] in_coefficient;
out_coefficient = new gain_t[xfade_samples];
in_coefficient = new gain_t[xfade_samples];
compute_equal_power_fades (xfade_samples, in_coefficient, out_coefficient);
}
void
SndFileSource::set_timeline_position (samplepos_t pos)
{
// destructive track timeline postion does not change
// except at instantion or when header_position_offset
// (session start) changes
if (!destructive()) {
AudioFileSource::set_timeline_position (pos);
}
}
int
SndFileSource::get_soundfile_info (const string& path, SoundFileInfo& info, string& error_msg)
{
SNDFILE *sf;
SF_INFO sf_info;
BroadcastInfo binfo;
sf_info.format = 0; // libsndfile says to clear this before sf_open().
if (path.empty() || Glib::file_test(path, Glib::FILE_TEST_IS_DIR)) {
return false;
}
#ifdef PLATFORM_WINDOWS
int fd = g_open (path.c_str(), O_RDONLY, 0444);
#else
int fd = ::open (path.c_str(), O_RDONLY, 0444);
#endif
if (fd == -1) {
error << string_compose ( _("SndFileSource: cannot open file \"%1\" for reading"), path)
<< endmsg;
return false;
}
if ((sf = sf_open_fd (fd, SFM_READ, &sf_info, true)) == 0) {
char errbuf[1024];
error_msg = sf_error_str (0, errbuf, sizeof (errbuf) - 1);
return false;
}
info.samplerate = sf_info.samplerate;
info.channels = sf_info.channels;
info.length = sf_info.frames;
string major = sndfile_major_format(sf_info.format);
string minor = sndfile_minor_format(sf_info.format);
if (major.length() + minor.length() < 16) { /* arbitrary */
info.format_name = string_compose("%1/%2", major, minor);
} else {
info.format_name = string_compose("%1\n%2", major, minor);
}
info.timecode = binfo.load_from_file (sf) ? binfo.get_time_reference() : 0;
sf_close (sf);
return true;
}
bool
SndFileSource::one_of_several_channels () const
{
return _info.channels > 1;
}
bool
SndFileSource::clamped_at_unity () const
{
int const type = _info.format & SF_FORMAT_TYPEMASK;
int const sub = _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);
}
void
SndFileSource::file_closed ()
{
/* stupid libsndfile updated the headers on close,
so touch the peakfile if it exists and has data
to make sure its time is as new as the audio
file.
*/
touch_peakfile ();
}
void
SndFileSource::set_path (const string& p)
{
FileSource::set_path (p);
}
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