X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fsndfilesource.cc;h=e53496434372e4b8edade139bd7b1c02ca9bf5d3;hb=4808f7fe8b4208ab1cd1fcb505867092272d726c;hp=6ea0929ae0a4b3d90dc21482c646c7946ed1bea1;hpb=be362ae53c1d191e23d8a084d0327044bce4544c;p=ardour.git diff --git a/libs/ardour/sndfilesource.cc b/libs/ardour/sndfilesource.cc index 6ea0929ae0..e534964343 100644 --- a/libs/ardour/sndfilesource.cc +++ b/libs/ardour/sndfilesource.cc @@ -15,7 +15,6 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id$ */ #include @@ -23,63 +22,62 @@ #include #include +#include #include - #include +#include +#include #include "i18n.h" using namespace std; using namespace ARDOUR; - -SndFileSource::SndFileSource (const XMLNode& node) - : AudioFileSource (node) +using namespace PBD; +using Glib::ustring; + +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); + init (); if (open()) { throw failed_constructor (); } - - if (_build_peakfiles) { - if (initialize_peakfile (false, _path)) { - sf_close (sf); - sf = 0; - throw failed_constructor (); - } - } - - AudioSourceCreated (this); /* EMIT SIGNAL */ } -SndFileSource::SndFileSource (string idstr, Flag flags) - : AudioFileSource (idstr, Flag (flags & ~(Writable|Removable|RemovableIfEmpty|RemoveAtDestroy))) +SndFileSource::SndFileSource (Session& s, ustring path, int chn, Flag flags) + /* files created this way are never writable or removable */ + : AudioFileSource (s, path, Flag (flags & ~(Writable|Removable|RemovableIfEmpty|RemoveAtDestroy))) { - init (idstr); + _channel = chn; + + init (); if (open()) { throw failed_constructor (); } - - if (_build_peakfiles) { - if (initialize_peakfile (false, _path)) { - sf_close (sf); - sf = 0; - throw failed_constructor (); - } - } - - - AudioSourceCreated (this); /* EMIT SIGNAL */ } -SndFileSource::SndFileSource (string idstr, SampleFormat sfmt, HeaderFormat hf, jack_nframes_t rate, Flag flags) - : AudioFileSource(idstr, flags, sfmt, hf) +SndFileSource::SndFileSource (Session& s, ustring path, SampleFormat sfmt, HeaderFormat hf, nframes_t rate, Flag flags) + : AudioFileSource (s, path, flags, sfmt, hf) { int fmt = 0; - init (idstr); + init (); + + /* this constructor is used to construct new files, not open + existing ones. + */ + + file_is_new = true; switch (hf) { case CAF: @@ -122,6 +120,10 @@ SndFileSource::SndFileSource (string idstr, SampleFormat sfmt, HeaderFormat hf, case FormatInt24: fmt |= SF_FORMAT_PCM_24; break; + + case FormatInt16: + fmt |= SF_FORMAT_PCM_16; + break; } _info.channels = 1; @@ -154,6 +156,8 @@ SndFileSource::SndFileSource (string idstr, SampleFormat sfmt, HeaderFormat hf, utsinfo.version); _broadcast_info->version = 1; + _broadcast_info->time_reference_low = 0; + _broadcast_info->time_reference_high = 0; /* XXX do something about this field */ @@ -168,43 +172,24 @@ SndFileSource::SndFileSource (string idstr, SampleFormat sfmt, HeaderFormat hf, _flags = Flag (_flags & ~Broadcast); delete _broadcast_info; _broadcast_info = 0; - } - } - - if (_build_peakfiles) { - if (initialize_peakfile (true, _path)) { - sf_close (sf); - sf = 0; - throw failed_constructor (); - } - } - - /* since SndFileSource's constructed with this constructor can be writable, make sure we update if the header info changes */ - - if (writable()) { - HeaderPositionOffsetChanged.connect (mem_fun (*this, &AudioFileSource::handle_header_position_change)); - } - - AudioSourceCreated (this); /* EMIT SIGNAL */ + } + } } void -SndFileSource::init (const string& idstr) +SndFileSource::init () { - string::size_type pos; - string file; + ustring file; - interleave_buf = 0; - interleave_bufsize = 0; + // lets try to keep the object initalizations here at the top + xfade_buf = 0; sf = 0; _broadcast_info = 0; - if ((pos = idstr.find_last_of (':')) == string::npos) { - channel = 0; - _name = Glib::path_get_basename (idstr); + if (is_embedded()) { + _name = _path; } else { - channel = atoi (idstr.substr (pos+1).c_str()); - _name = Glib::path_get_basename (idstr.substr (0, pos)); + _name = Glib::path_get_basename (_path); } /* although libsndfile says we don't need to set this, @@ -212,6 +197,17 @@ SndFileSource::init (const string& idstr) */ memset (&_info, 0, sizeof(_info)); + + _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 @@ -220,13 +216,21 @@ 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); +#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. + */ + 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) { - error << string_compose(_("SndFileSource: file only contains %1 channels; %2 is invalid as a channel number"), _info.channels, channel) << endmsg; + 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 (sf); sf = 0; return -1; @@ -234,6 +238,19 @@ SndFileSource::open () _length = _info.frames; + _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 (_length != 0 && !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); } @@ -241,27 +258,29 @@ SndFileSource::open () return 0; } -void -SndFileSource::close () +SndFileSource::~SndFileSource () { + GoingAway (); /* EMIT SIGNAL */ + if (sf) { sf_close (sf); sf = 0; - } -} - -SndFileSource::~SndFileSource () -{ - GoingAway (this); /* EMIT SIGNAL */ - close (); + /* 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. + */ - if (interleave_buf) { - delete [] interleave_buf; + touch_peakfile (); } if (_broadcast_info) { - delete [] _broadcast_info; + delete _broadcast_info; + } + + if (xfade_buf) { + delete [] xfade_buf; } } @@ -271,13 +290,13 @@ SndFileSource::sample_rate () const return _info.samplerate; } -jack_nframes_t -SndFileSource::read_unlocked (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; - jack_nframes_t file_cnt; + nframes_t file_cnt; if (start > _length) { @@ -298,6 +317,11 @@ SndFileSource::read_unlocked (Sample *dst, jack_nframes_t start, jack_nframes_t file_cnt = cnt; } + if (file_cnt != cnt) { + nframes_t delta = cnt - file_cnt; + memset (dst+file_cnt, 0, sizeof (Sample) * delta); + } + if (file_cnt) { if (sf_seek (sf, (sf_count_t) start, SEEK_SET|SFM_READ) != (sf_count_t) start) { @@ -308,30 +332,18 @@ SndFileSource::read_unlocked (Sample *dst, jack_nframes_t start, jack_nframes_t } if (_info.channels == 1) { - jack_nframes_t ret = sf_read_float (sf, dst, file_cnt); + nframes_t ret = sf_read_float (sf, dst, file_cnt); _read_data_count = cnt * sizeof(float); return ret; } } - if (file_cnt != cnt) { - jack_nframes_t delta = cnt - file_cnt; - memset (dst+file_cnt, 0, sizeof (Sample) * delta); - } - real_cnt = cnt * _info.channels; - if (interleave_bufsize < real_cnt) { - - if (interleave_buf) { - delete [] interleave_buf; - } - interleave_bufsize = real_cnt; - interleave_buf = new float[interleave_bufsize]; - } + Sample* interleave_buf = get_interleave_buffer (real_cnt); nread = sf_read_float (sf, interleave_buf, real_cnt); - ptr = interleave_buf + channel; + ptr = interleave_buf + _channel; nread /= _info.channels; /* stride through the interleaved data */ @@ -346,10 +358,21 @@ SndFileSource::read_unlocked (Sample *dst, jack_nframes_t start, jack_nframes_t return nread; } -jack_nframes_t -SndFileSource::write_unlocked (Sample *data, jack_nframes_t cnt, char * workbuf) +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()) { + warning << string_compose (_("attempt to write a non-writable audio file source (%1)"), _path) << endmsg; return 0; } @@ -359,9 +382,9 @@ SndFileSource::write_unlocked (Sample *data, jack_nframes_t cnt, char * workbuf) return 0; } - jack_nframes_t oldlen; + nframes_t oldlen; int32_t frame_pos = _length; - + if (write_float (data, frame_pos, cnt) != cnt) { return 0; } @@ -370,67 +393,149 @@ SndFileSource::write_unlocked (Sample *data, jack_nframes_t cnt, char * workbuf) update_length (oldlen, cnt); if (_build_peakfiles) { - PeakBuildRecord *pbr = 0; + compute_and_write_peaks (data, frame_pos, cnt, false, true); + } + + _write_data_count = cnt; + + return cnt; +} + +nframes_t +SndFileSource::destructive_write_unlocked (Sample* data, nframes_t cnt) +{ + nframes_t old_file_pos; + + 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; - if (pending_peak_builds.size()) { - pbr = pending_peak_builds.back(); - } - - if (pbr && pbr->frame + pbr->cnt == oldlen) { - - /* the last PBR extended to the start of the current write, - so just extend it again. - */ + /* 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; + } + + file_pos = ofilepos; // adjusted below - pbr->cnt += cnt; - } else { - pending_peak_builds.push_back (new PeakBuildRecord (oldlen, cnt)); - } - - _peaks_built = false; + } 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; + } + + } 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; + } } - - + + old_file_pos = file_pos; + update_length (file_pos, cnt); + if (_build_peakfiles) { - queue_for_peaks (*this); + compute_and_write_peaks (data, file_pos, cnt, false, true); } - _write_data_count = cnt; + file_pos += cnt; return cnt; } int -SndFileSource::update_header (jack_nframes_t when, struct tm& now, time_t tnow) +SndFileSource::update_header (nframes_t when, struct tm& now, time_t tnow) { - /* allow derived classes to override how this is done */ - set_timeline_position (when); if (_flags & Broadcast) { - /* this will flush the header implicitly */ - return setup_broadcast_info (when, now, tnow); - } else { - return flush_header (); - } + if (setup_broadcast_info (when, now, tnow)) { + return -1; + } + } + + return flush_header (); } int SndFileSource::flush_header () { + if (!writable() || (sf == 0)) { + warning << string_compose (_("attempt to flush a non-writable audio file source (%1)"), _path) << endmsg; + return -1; + } return (sf_command (sf, SFC_UPDATE_HEADER_NOW, 0, 0) != SF_TRUE); } int -SndFileSource::setup_broadcast_info (jack_nframes_t when, struct tm& now, time_t tnow) +SndFileSource::setup_broadcast_info (nframes_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 (!(_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", - bwf_country_code, - bwf_organization_code, + Config->get_bwf_country_code().c_str(), + Config->get_bwf_organization_code().c_str(), bwf_serial_number, now.tm_hour, now.tm_min, @@ -442,7 +547,7 @@ SndFileSource::setup_broadcast_info (jack_nframes_t when, struct tm& now, time_t now.tm_mon, now.tm_mday); - snprintf (_broadcast_info->origination_time, sizeof (_broadcast_info->origination_time), "%02d-%02d-%02d", + snprintf (_broadcast_info->origination_time, sizeof (_broadcast_info->origination_time), "%02d:%02d:%02d", now.tm_hour, now.tm_min, now.tm_sec); @@ -451,8 +556,6 @@ SndFileSource::setup_broadcast_info (jack_nframes_t when, struct tm& now, time_t set_header_timeline_position (); - /* note that libsndfile flushes the header to disk when resetting the broadcast info */ - 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); @@ -467,42 +570,330 @@ SndFileSource::setup_broadcast_info (jack_nframes_t when, struct tm& now, time_t void SndFileSource::set_header_timeline_position () { - uint64_t pos; + 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; +} - _broadcast_info->time_reference_high = 0; +nframes_t +SndFileSource::natural_position() const +{ + return timeline_position; +} - if (header_position_negative) { +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; +} - if (ULONG_LONG_MAX - header_position_offset < timeline_position) { - pos = ULONG_LONG_MAX; // impossible +void +SndFileSource::mark_capture_start (nframes_t pos) +{ + if (destructive()) { + if (pos < timeline_position) { + _capture_start = false; } else { - pos = timeline_position + header_position_offset; + _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]); + } - if (timeline_position < header_position_offset) { - pos = 0; } else { - pos = timeline_position - header_position_offset; + + + /* 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; } } - _broadcast_info->time_reference_high = (pos >> 32); - _broadcast_info->time_reference_low = (pos & 0xffffffff); + return cnt; } -jack_nframes_t -SndFileSource::write_float (Sample* data, jack_nframes_t frame_pos, jack_nframes_t cnt) +nframes_t +SndFileSource::last_capture_start_frame () const { - if (sf_seek (sf, frame_pos, SEEK_SET|SFM_WRITE) != frame_pos) { - error << string_compose (_("%1: cannot seek to %2"), _path, frame_pos) << endmsg; + if (destructive()) { + return capture_start_frame; + } else { return 0; } - - if (sf_writef_float (sf, data, cnt) != (ssize_t) cnt) { - 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 (const ustring& 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; } - return cnt; + 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; } + +bool +SndFileSource::one_of_several_channels () const +{ + return _info.channels > 1; +} +