X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fsndfilesource.cc;h=91605049caa4c381554d207bea3dee503220a028;hb=55a85aa2a906d56818a35172594762a637d85f6d;hp=87f7faf423dff8330f8c83f4a8976233044e2276;hpb=eb3f77df5748e81c4a6bfe737cd9b5a3d721a86c;p=ardour.git diff --git a/libs/ardour/sndfilesource.cc b/libs/ardour/sndfilesource.cc index 87f7faf423..91605049ca 100644 --- a/libs/ardour/sndfilesource.cc +++ b/libs/ardour/sndfilesource.cc @@ -18,47 +18,188 @@ $Id$ */ +#include +#include + +#include +#include +#include + +#include + #include +#include +#include #include "i18n.h" +using namespace std; using namespace ARDOUR; +using namespace PBD; + +gain_t* SndFileSource::out_coefficient = 0; +gain_t* SndFileSource::in_coefficient = 0; +nframes_t SndFileSource::xfade_frames = 64; +const AudioFileSource::Flag SndFileSource::default_writable_flags = AudioFileSource::Flag (AudioFileSource::Writable| + AudioFileSource::Removable| + AudioFileSource::RemovableIfEmpty| + AudioFileSource::CanRename); + +SndFileSource::SndFileSource (Session& s, const XMLNode& node) + : AudioFileSource (s, node) +{ + init (_name); -SndFileSource::SndFileSource (const XMLNode& node) - : ExternalSource (node) + if (open()) { + throw failed_constructor (); + } +} + +SndFileSource::SndFileSource (Session& s, string idstr, Flag flags) + /* files created this way are never writable or removable */ + : AudioFileSource (s, idstr, Flag (flags & ~(Writable|Removable|RemovableIfEmpty|RemoveAtDestroy))) { - init (_name, true); - SourceCreated (this); /* EMIT SIGNAL */ + init (idstr); + + if (open()) { + throw failed_constructor (); + } } -SndFileSource::SndFileSource (const string& idstr, bool build_peak) - : ExternalSource(idstr, build_peak) +SndFileSource::SndFileSource (Session& s, string idstr, SampleFormat sfmt, HeaderFormat hf, nframes_t rate, Flag flags) + : AudioFileSource (s, idstr, flags, sfmt, hf) { - init (idstr, build_peak); + int fmt = 0; - if (build_peak) { - SourceCreated (this); /* EMIT SIGNAL */ + init (idstr); + + /* this constructor is used to construct new files, not open + existing ones. + */ + + file_is_new = true; + + switch (hf) { + case CAF: + fmt = SF_FORMAT_CAF; + _flags = Flag (_flags & ~Broadcast); + 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; + + default: + fatal << string_compose (_("programming error: %1"), X_("unsupported audio header format requested")) << endmsg; + /*NOTREACHED*/ + break; + + } + + switch (sfmt) { + case FormatFloat: + fmt |= SF_FORMAT_FLOAT; + break; + + case FormatInt24: + fmt |= SF_FORMAT_PCM_24; + break; + } + + _info.channels = 1; + _info.samplerate = rate; + _info.format = fmt; + + if (open()) { + throw failed_constructor(); + } + + if (writable() && (_flags & Broadcast)) { + + _broadcast_info = new SF_BROADCAST_INFO; + memset (_broadcast_info, 0, sizeof (*_broadcast_info)); + + snprintf (_broadcast_info->description, sizeof (_broadcast_info->description), "BWF %s", _name.c_str()); + + struct utsname utsinfo; + + if (uname (&utsinfo)) { + error << string_compose(_("FileSource: cannot get host information for BWF header (%1)"), strerror(errno)) << endmsg; + return; + } + + snprintf (_broadcast_info->originator, sizeof (_broadcast_info->originator), "ardour:%s:%s:%s:%s:%s)", + Glib::get_real_name().c_str(), + utsinfo.nodename, + utsinfo.sysname, + utsinfo.release, + utsinfo.version); + + _broadcast_info->version = 1; + _broadcast_info->time_reference_low = 0; + _broadcast_info->time_reference_high = 0; + + /* XXX do something about this field */ + + snprintf (_broadcast_info->umid, sizeof (_broadcast_info->umid), "%s", "fnord"); + + /* coding history is added by libsndfile */ + + if (sf_command (sf, SFC_SET_BROADCAST_INFO, _broadcast_info, sizeof (_broadcast_info)) != SF_TRUE) { + char errbuf[256]; + sf_error_str (0, errbuf, sizeof (errbuf) - 1); + error << string_compose (_("cannot set broadcast info for audio file %1 (%2); dropping broadcast info for this file"), _path, errbuf) << endmsg; + _flags = Flag (_flags & ~Broadcast); + delete _broadcast_info; + _broadcast_info = 0; + } + } } void -SndFileSource::init (const string& idstr, bool build_peak) +SndFileSource::init (string idstr) { string::size_type pos; string file; - tmpbuf = 0; - tmpbufsize = 0; + // lets try to keep the object initalizations here at the top + xfade_buf = 0; + interleave_buf = 0; + interleave_bufsize = 0; sf = 0; + _broadcast_info = 0; - _name = idstr; + string tmp_name; if ((pos = idstr.find_last_of (':')) == string::npos) { channel = 0; - file = idstr; + tmp_name = idstr; } else { channel = atoi (idstr.substr (pos+1).c_str()); - file = idstr.substr (0, pos); + tmp_name = idstr.substr (0, pos); + } + + if (is_embedded()) { + _name = tmp_name; + } else { + _name = Glib::path_get_basename (tmp_name); } /* although libsndfile says we don't need to set this, @@ -67,45 +208,85 @@ SndFileSource::init (const string& idstr, bool build_peak) memset (&_info, 0, sizeof(_info)); - /* note that we temporarily truncated _id at the colon */ - - if ((sf = sf_open (file.c_str(), SFM_READ, &_info)) == 0) { + _capture_start = false; + _capture_end = false; + file_pos = 0; + + if (destructive()) { + xfade_buf = new Sample[xfade_frames]; + timeline_position = header_position_offset; + } + + AudioFileSource::HeaderPositionOffsetChanged.connect (mem_fun (*this, &SndFileSource::handle_header_position_change)); +} + +int +SndFileSource::open () +{ + if ((sf = sf_open (_path.c_str(), (writable() ? SFM_RDWR : SFM_READ), &_info)) == 0) { char errbuf[256]; sf_error_str (0, errbuf, sizeof (errbuf) - 1); - error << string_compose(_("SndFileSource: cannot open file \"%1\" (%2)"), file, errbuf) << endmsg; - throw failed_constructor(); + error << string_compose(_("SndFileSource: cannot open file \"%1\" for %2 (%3)"), + _path, (writable() ? "read+write" : "reading"), errbuf) << endmsg; + return -1; } if (channel >= _info.channels) { error << string_compose(_("SndFileSource: file only contains %1 channels; %2 is invalid as a channel number"), _info.channels, channel) << endmsg; sf_close (sf); sf = 0; - throw failed_constructor(); + return -1; } _length = _info.frames; - _path = file; - if (build_peak) { - if (initialize_peakfile (false, _path)) { - sf_close (sf); - sf = 0; - throw failed_constructor (); - } + _broadcast_info = new SF_BROADCAST_INFO; + memset (_broadcast_info, 0, sizeof (*_broadcast_info)); + + bool timecode_info_exists; + + set_timeline_position (get_timecode_info (sf, _broadcast_info, timecode_info_exists)); + + if (!timecode_info_exists) { + delete _broadcast_info; + _broadcast_info = 0; + _flags = Flag (_flags & ~Broadcast); } + + if (writable()) { + sf_command (sf, SFC_SET_UPDATE_HEADER_AUTO, 0, SF_FALSE); + } + + return 0; } SndFileSource::~SndFileSource () - { - GoingAway (this); /* EMIT SIGNAL */ + GoingAway (); /* EMIT SIGNAL */ if (sf) { sf_close (sf); + sf = 0; + + /* 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 (); + } + + if (interleave_buf) { + delete [] interleave_buf; + } + + if (_broadcast_info) { + delete _broadcast_info; } - if (tmpbuf) { - delete [] tmpbuf; + if (xfade_buf) { + delete [] xfade_buf; } } @@ -115,54 +296,651 @@ SndFileSource::sample_rate () const return _info.samplerate; } -jack_nframes_t -SndFileSource::read (Sample *dst, jack_nframes_t start, jack_nframes_t cnt, char * workbuf) const +nframes_t +SndFileSource::read_unlocked (Sample *dst, nframes_t start, nframes_t cnt) const { int32_t nread; float *ptr; uint32_t real_cnt; + nframes_t file_cnt; - if (sf_seek (sf, (off_t) start, SEEK_SET) < 0) { - char errbuf[256]; - sf_error_str (0, errbuf, sizeof (errbuf) - 1); - error << string_compose(_("SndFileSource: could not seek to frame %1 within %2 (%3)"), start, _name.substr (1), errbuf) << 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; + } + + if (file_cnt) { + + if (sf_seek (sf, (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 frame %1 within %2 (%3)"), start, _name.substr (1), errbuf) << endmsg; + return 0; + } + + if (_info.channels == 1) { + nframes_t ret = sf_read_float (sf, dst, file_cnt); + _read_data_count = cnt * sizeof(float); + return ret; + } } - if (_info.channels == 1) { - jack_nframes_t ret = sf_read_float (sf, dst, cnt); - _read_data_count = cnt * sizeof(float); - return ret; + if (file_cnt != cnt) { + nframes_t delta = cnt - file_cnt; + memset (dst+file_cnt, 0, sizeof (Sample) * delta); } real_cnt = cnt * _info.channels; - { - Glib::Mutex::Lock lm (_tmpbuf_lock); + if (interleave_bufsize < real_cnt) { - if (tmpbufsize < real_cnt) { + if (interleave_buf) { + delete [] interleave_buf; + } + interleave_bufsize = real_cnt; + interleave_buf = new float[interleave_bufsize]; + } + + nread = sf_read_float (sf, interleave_buf, real_cnt); + ptr = interleave_buf + channel; + nread /= _info.channels; + + /* stride through the interleaved data */ + + for (int32_t n = 0; n < nread; ++n) { + dst[n] = *ptr; + ptr += _info.channels; + } + + _read_data_count = cnt * sizeof(float); + + return nread; +} + +nframes_t +SndFileSource::write_unlocked (Sample *data, nframes_t cnt) +{ + if (destructive()) { + return destructive_write_unlocked (data, cnt); + } else { + return nondestructive_write_unlocked (data, cnt); + } +} + +nframes_t +SndFileSource::nondestructive_write_unlocked (Sample *data, nframes_t cnt) +{ + if (!writable()) { + return 0; + } + + if (_info.channels != 1) { + fatal << string_compose (_("programming error: %1 %2"), X_("SndFileSource::write called on non-mono file"), _path) << endmsg; + /*NOTREACHED*/ + return 0; + } + + nframes_t oldlen; + int32_t frame_pos = _length; + + if (write_float (data, frame_pos, cnt) != cnt) { + return 0; + } + + oldlen = _length; + update_length (oldlen, cnt); + + if (_build_peakfiles) { + PeakBuildRecord *pbr = 0; + + if (pending_peak_builds.size()) { + pbr = pending_peak_builds.back(); + } - if (tmpbuf) { - delete [] tmpbuf; + if (pbr && pbr->frame + pbr->cnt == oldlen) { + + /* the last PBR extended to the start of the current write, + so just extend it again. + */ + + pbr->cnt += cnt; + } else { + pending_peak_builds.push_back (new PeakBuildRecord (oldlen, cnt)); } - tmpbufsize = real_cnt; - tmpbuf = new float[tmpbufsize]; + + _peaks_built = false; + } + + + if (_build_peakfiles) { + queue_for_peaks (shared_from_this ()); + } + + _write_data_count = cnt; + + return cnt; +} + +nframes_t +SndFileSource::destructive_write_unlocked (Sample* data, nframes_t cnt) +{ + nframes_t old_file_pos; + + if (!writable()) { + 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_frame - timeline_position; + + // split cnt in half + nframes_t subcnt = cnt / 2; + nframes_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; } - nread = sf_read_float (sf, tmpbuf, real_cnt); - ptr = tmpbuf + channel; - nread /= _info.channels; + 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_frame - timeline_position; + + if (crossfade (data, cnt, 1) != cnt) { + return 0; + } - /* stride through the interleaved data */ + } 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; - for (int32_t n = 0; n < nread; ++n) { - dst[n] = *ptr; - ptr += _info.channels; + if (crossfade (data, cnt, 0) != cnt) { + return 0; + } + + } else { + + /* in the middle of recording */ + + if (write_float (data, file_pos, cnt) != cnt) { + return 0; } } - _read_data_count = cnt * sizeof(float); + old_file_pos = file_pos; + update_length (file_pos, cnt); + file_pos += cnt; + + if (_build_peakfiles) { + PeakBuildRecord *pbr = 0; - return nread; + if (pending_peak_builds.size()) { + pbr = pending_peak_builds.back(); + } + + if (pbr && pbr->frame + pbr->cnt == old_file_pos) { + + /* the last PBR extended to the start of the current write, + so just extend it again. + */ + + pbr->cnt += cnt; + } else { + pending_peak_builds.push_back (new PeakBuildRecord (old_file_pos, cnt)); + } + + _peaks_built = false; + } + + if (_build_peakfiles) { + queue_for_peaks (shared_from_this ()); + } + + return cnt; } +int +SndFileSource::update_header (nframes_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() || (sf == 0)) { + return -1; + } + return (sf_command (sf, SFC_UPDATE_HEADER_NOW, 0, 0) != SF_TRUE); +} + +int +SndFileSource::setup_broadcast_info (nframes_t when, struct tm& now, time_t tnow) +{ + if (!writable()) { + return -1; + } + + if (!(_flags & Broadcast)) { + return 0; + } + + /* random code is 9 digits */ + + int random_code = random() % 999999999; + + snprintf (_broadcast_info->originator_reference, sizeof (_broadcast_info->originator_reference), "%2s%3s%12s%02d%02d%02d%9d", + Config->get_bwf_country_code().c_str(), + Config->get_bwf_organization_code().c_str(), + bwf_serial_number, + now.tm_hour, + now.tm_min, + now.tm_sec, + random_code); + + snprintf (_broadcast_info->origination_date, sizeof (_broadcast_info->origination_date), "%4d-%02d-%02d", + 1900 + now.tm_year, + now.tm_mon, + now.tm_mday); + + snprintf (_broadcast_info->origination_time, sizeof (_broadcast_info->origination_time), "%02d:%02d:%02d", + now.tm_hour, + now.tm_min, + now.tm_sec); + + /* now update header position taking header offset into account */ + + set_header_timeline_position (); + + if (sf_command (sf, SFC_SET_BROADCAST_INFO, _broadcast_info, sizeof (*_broadcast_info)) != SF_TRUE) { + error << string_compose (_("cannot set broadcast info for audio file %1; Dropping broadcast info for this file"), _path) << endmsg; + _flags = Flag (_flags & ~Broadcast); + delete _broadcast_info; + _broadcast_info = 0; + return -1; + } + + return 0; +} + +void +SndFileSource::set_header_timeline_position () +{ + if (!(_flags & Broadcast)) { + return; + } + + _broadcast_info->time_reference_high = (timeline_position >> 32); + _broadcast_info->time_reference_low = (timeline_position & 0xffffffff); + + if (sf_command (sf, SFC_SET_BROADCAST_INFO, _broadcast_info, sizeof (*_broadcast_info)) != SF_TRUE) { + error << string_compose (_("cannot set broadcast info for audio file %1; Dropping broadcast info for this file"), _path) << endmsg; + _flags = Flag (_flags & ~Broadcast); + delete _broadcast_info; + _broadcast_info = 0; + } + + + +} + +nframes_t +SndFileSource::write_float (Sample* data, nframes_t frame_pos, nframes_t cnt) +{ + if (sf_seek (sf, frame_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, frame_pos, errbuf) << endmsg; + return 0; + } + + if (sf_writef_float (sf, data, cnt) != (ssize_t) cnt) { + return 0; + } + + return cnt; +} + +nframes_t +SndFileSource::natural_position() const +{ + return timeline_position; +} + +bool +SndFileSource::set_destructive (bool yn) +{ + if (yn) { + _flags = Flag (_flags | Destructive); + if (!xfade_buf) { + xfade_buf = new Sample[xfade_frames]; + } + clear_capture_marks (); + timeline_position = header_position_offset; + } else { + _flags = Flag (_flags & ~Destructive); + timeline_position = 0; + /* leave xfade buf alone in case we need it again later */ + } + + return true; +} + +void +SndFileSource::clear_capture_marks () +{ + _capture_start = false; + _capture_end = false; +} + +void +SndFileSource::mark_capture_start (nframes_t pos) +{ + if (destructive()) { + if (pos < timeline_position) { + _capture_start = false; + } else { + _capture_start = true; + capture_start_frame = pos; + } + } +} + +void +SndFileSource::mark_capture_end() +{ + if (destructive()) { + _capture_end = true; + } +} + +nframes_t +SndFileSource::crossfade (Sample* data, nframes_t cnt, int fade_in) +{ + nframes_t xfade = min (xfade_frames, cnt); + nframes_t nofade = cnt - xfade; + Sample* fade_data = 0; + nframes_t fade_position = 0; // in frames + ssize_t retval; + nframes_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) { + nframes_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_frames) { + + nframes_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_frames) { + + gain_t in[xfade]; + gain_t out[xfade]; + + /* short xfade, compute custom curve */ + + compute_equal_power_fades (xfade, in, out); + + for (nframes_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; +} + +nframes_t +SndFileSource::last_capture_start_frame () const +{ + if (destructive()) { + return capture_start_frame; + } 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 (nframes_t rate) +{ + /* This static method is assumed to have been called by the Session + before any DFS's are created. + */ + + xfade_frames = (nframes_t) floor ((Config->get_destructive_xfade_msecs () / 1000.0) * rate); + + if (out_coefficient) { + delete [] out_coefficient; + } + + if (in_coefficient) { + delete [] in_coefficient; + } + + out_coefficient = new gain_t[xfade_frames]; + in_coefficient = new gain_t[xfade_frames]; + + compute_equal_power_fades (xfade_frames, in_coefficient, out_coefficient); +} + +void +SndFileSource::set_timeline_position (int64_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 (string path, SoundFileInfo& info, string& error_msg) +{ + SNDFILE *sf; + SF_INFO sf_info; + SF_BROADCAST_INFO binfo; + bool timecode_exists; + + sf_info.format = 0; // libsndfile says to clear this before sf_open(). + + if ((sf = sf_open ((char*) path.c_str(), SFM_READ, &sf_info)) == 0) { + char errbuf[256]; + 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; + info.format_name = string_compose("Format: %1, %2", + sndfile_major_format(sf_info.format), + sndfile_minor_format(sf_info.format)); + + memset (&binfo, 0, sizeof (binfo)); + info.timecode = get_timecode_info (sf, &binfo, timecode_exists); + + if (!timecode_exists) { + info.timecode = 0; + } + + sf_close (sf); + + return true; +} + +int64_t +SndFileSource::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 (header_position_offset); + } + + /* XXX 64 bit alert: when JACK switches to a 64 bit frame count, this needs to use the high bits + of the time reference. + */ + + exists = true; + int64_t ret = (uint32_t) binfo->time_reference_high; + ret <<= 32; + ret |= (uint32_t) binfo->time_reference_low; + return ret; +}