X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fsndfilesource.cc;h=91605049caa4c381554d207bea3dee503220a028;hb=55a85aa2a906d56818a35172594762a637d85f6d;hp=0443ffcc5542774ae5ca640d58b036dd8e3b9949;hpb=186a5a23716bec8c5a9c576ce3924c430bef7b31;p=ardour.git diff --git a/libs/ardour/sndfilesource.cc b/libs/ardour/sndfilesource.cc index 0443ffcc55..91605049ca 100644 --- a/libs/ardour/sndfilesource.cc +++ b/libs/ardour/sndfilesource.cc @@ -28,6 +28,8 @@ #include #include +#include +#include #include "i18n.h" @@ -35,6 +37,14 @@ 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) { @@ -169,6 +179,8 @@ SndFileSource::init (string idstr) string::size_type pos; string file; + // lets try to keep the object initalizations here at the top + xfade_buf = 0; interleave_buf = 0; interleave_bufsize = 0; sf = 0; @@ -195,6 +207,17 @@ SndFileSource::init (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 @@ -220,27 +243,14 @@ SndFileSource::open () _broadcast_info = new SF_BROADCAST_INFO; memset (_broadcast_info, 0, sizeof (*_broadcast_info)); - /* lookup broadcast info */ - - if (sf_command (sf, SFC_GET_BROADCAST_INFO, _broadcast_info, sizeof (*_broadcast_info)) != SF_TRUE) { + bool timecode_info_exists; - /* if the file has data but no broadcast info, then clearly, there is no broadcast info */ + set_timeline_position (get_timecode_info (sf, _broadcast_info, timecode_info_exists)); - if (_length) { - delete _broadcast_info; - _broadcast_info = 0; - _flags = Flag (_flags & ~Broadcast); - } - - set_timeline_position (header_position_offset); - - } else { - - /* XXX 64 bit alert: when JACK switches to a 64 bit frame count, this needs to use the high bits - of the time reference. - */ - - set_timeline_position ( _broadcast_info->time_reference_low ); + if (!timecode_info_exists) { + delete _broadcast_info; + _broadcast_info = 0; + _flags = Flag (_flags & ~Broadcast); } if (writable()) { @@ -274,6 +284,10 @@ SndFileSource::~SndFileSource () if (_broadcast_info) { delete _broadcast_info; } + + if (xfade_buf) { + delete [] xfade_buf; + } } float @@ -359,6 +373,16 @@ SndFileSource::read_unlocked (Sample *dst, nframes_t start, nframes_t cnt) const 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; @@ -411,6 +435,117 @@ SndFileSource::write_unlocked (Sample *data, nframes_t 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; + } + + 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; + } + + } 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); + file_pos += cnt; + + if (_build_peakfiles) { + PeakBuildRecord *pbr = 0; + + 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) { @@ -507,7 +642,7 @@ SndFileSource::set_header_timeline_position () nframes_t SndFileSource::write_float (Sample* data, nframes_t frame_pos, nframes_t cnt) { - if (sf_seek (sf, frame_pos, SEEK_SET|SFM_WRITE) != frame_pos) { + 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; @@ -526,3 +661,286 @@ 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; +}