diff options
Diffstat (limited to 'libs/ardour/destructive_filesource.cc')
| -rw-r--r-- | libs/ardour/destructive_filesource.cc | 424 |
1 files changed, 0 insertions, 424 deletions
diff --git a/libs/ardour/destructive_filesource.cc b/libs/ardour/destructive_filesource.cc deleted file mode 100644 index 5eada195cd..0000000000 --- a/libs/ardour/destructive_filesource.cc +++ /dev/null @@ -1,424 +0,0 @@ -/* - 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. - - $Id$ -*/ - -/* This is is very hacky way to get pread and pwrite declarations. - First, include <features.h> so that we can avoid its #undef __USE_UNIX98. - Then define __USE_UNIX98, include <unistd.h>, and then undef it - again. If #define _XOPEN_SOURCE actually worked, I'd use that, but - despite claims in the header that it does, it doesn't. - - features.h isn't available on osx and it compiles fine without it. -*/ - -#ifdef HAVE_FEATURES_H -#include <features.h> -#endif - -#if __GNUC__ >= 3 -// #define _XOPEN_SOURCE 500 -#include <unistd.h> -#else -#define __USE_UNIX98 -#include <unistd.h> -#undef __USE_UNIX98 -#endif - -// darwin supports 64 by default and doesn't provide wrapper functions. -#if defined (__APPLE__) -typedef off_t off64_t; -#define open64 open -#define close64 close -#define lseek64 lseek -#define pread64 pread -#define pwrite64 pwrite -#endif - -#include <errno.h> -#include <cmath> -#include <fcntl.h> - -#include <pbd/error.h> -#include <pbd/stacktrace.h> -#include <ardour/destructive_filesource.h> -#include <ardour/utils.h> -#include <ardour/session.h> - -#include "i18n.h" - -using namespace std; -using namespace ARDOUR; -using namespace PBD; - -gain_t* DestructiveFileSource::out_coefficient = 0; -gain_t* DestructiveFileSource::in_coefficient = 0; -nframes_t DestructiveFileSource::xfade_frames = 64; - -DestructiveFileSource::DestructiveFileSource (Session& s, string path, SampleFormat samp_format, HeaderFormat hdr_format, nframes_t rate, Flag flags) - : SndFileSource (s, path, samp_format, hdr_format, rate, flags) -{ - init (); -} - - -DestructiveFileSource::DestructiveFileSource (Session& s, string path, Flag flags) - : SndFileSource (s, path, flags) -{ - init (); -} - -DestructiveFileSource::DestructiveFileSource (Session& s, const XMLNode& node) - : SndFileSource (s, node) -{ - init (); -} - -void -DestructiveFileSource::init () -{ - xfade_buf = new Sample[xfade_frames]; - - _capture_start = false; - _capture_end = false; - file_pos = 0; - - timeline_position = header_position_offset; - AudioFileSource::HeaderPositionOffsetChanged.connect (mem_fun (*this, &DestructiveFileSource::handle_header_position_change)); -} - -DestructiveFileSource::~DestructiveFileSource() -{ - delete xfade_buf; -} - -void -DestructiveFileSource::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 -DestructiveFileSource::mark_capture_start (nframes_t pos) -{ - if (pos < timeline_position) { - _capture_start = false; - } else { - _capture_start = true; - capture_start_frame = pos; - } -} - -void -DestructiveFileSource::mark_capture_end() -{ - _capture_end = true; -} - -void -DestructiveFileSource::clear_capture_marks () -{ - _capture_start = false; - _capture_end = false; -} - -nframes_t -DestructiveFileSource::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(_("DestructiveFileSource: \"%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(_("DestructiveFileSource: \"%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) { - - 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]); - } - } - - if (xfade) { - if (write_float (xfade_buf, fade_position, xfade) != xfade) { - error << string_compose(_("DestructiveFileSource: \"%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(_("DestructiveFileSource: \"%1\" bad write (%2)"), _path, strerror (errno)) << endmsg; - return 0; - } - } - - return cnt; -} - -nframes_t -DestructiveFileSource::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; -} - -nframes_t -DestructiveFileSource::last_capture_start_frame () const -{ - return capture_start_frame; -} - -XMLNode& -DestructiveFileSource::get_state () -{ - XMLNode& node = AudioFileSource::get_state (); - node.add_property (X_("destructive"), "true"); - return node; -} - -void -DestructiveFileSource::handle_header_position_change () -{ - 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 -DestructiveFileSource::set_timeline_position (int64_t pos) -{ - //destructive track timeline postion does not change except at instantion or when header_position_offset (session start) changes -} - -int -DestructiveFileSource::read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nframes_t cnt, double samples_per_unit) const -{ - // cerr << _name << " read peaks at " << start << " for " << cnt << " tpos = " << timeline_position << endl; - return AudioFileSource::read_peaks (peaks, npeaks, start, cnt, samples_per_unit); -} - |