git-svn-id: svn://localhost/ardour2/branches/3.0@6245 d708f5d6-7413-0410-9779-e7cbd77b26cf
605 lines
17 KiB
C++
605 lines
17 KiB
C++
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/*
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Copyright (C) 1999-2002 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifdef WAF_BUILD
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#include "libardour-config.h"
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#endif
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#include <iostream>
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#include <cmath>
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#include <unistd.h>
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#include "ardour/timestamps.h"
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#include "pbd/error.h"
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#include "pbd/enumwriter.h"
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#include "pbd/stacktrace.h"
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#include "ardour/ardour.h"
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#include "ardour/configuration.h"
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#include "ardour/audioengine.h"
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#include "ardour/session.h"
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#include "ardour/tempo.h"
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#include "i18n.h"
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using namespace std;
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using namespace ARDOUR;
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using namespace PBD;
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/* BBT TIME*/
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void
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Session::bbt_time (nframes_t when, BBT_Time& bbt)
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{
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_tempo_map->bbt_time (when, bbt);
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}
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/* Timecode TIME */
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float
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Session::timecode_frames_per_second() const
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{
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switch (config.get_timecode_format()) {
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case timecode_23976:
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return 23.976;
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break;
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case timecode_24:
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return 24;
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break;
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case timecode_24976:
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return 24.976;
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break;
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case timecode_25:
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return 25;
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break;
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case timecode_2997:
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return 29.97;
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break;
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case timecode_2997drop:
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return 29.97;
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break;
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case timecode_30:
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return 30;
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break;
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case timecode_30drop:
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return 30;
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break;
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case timecode_5994:
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return 59.94;
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break;
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case timecode_60:
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return 60;
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break;
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default:
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cerr << "Editor received unexpected timecode type" << endl;
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}
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return 30.0;
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}
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bool
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Session::timecode_drop_frames() const
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{
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switch (config.get_timecode_format()) {
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case timecode_23976:
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return false;
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break;
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case timecode_24:
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return false;
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break;
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case timecode_24976:
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return false;
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break;
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case timecode_25:
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return false;
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break;
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case timecode_2997:
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return false;
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break;
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case timecode_2997drop:
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return true;
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break;
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case timecode_30:
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return false;
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break;
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case timecode_30drop:
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return true;
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break;
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case timecode_5994:
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return false;
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break;
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case timecode_60:
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return false;
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break;
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default:
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error << "Editor received unexpected timecode type" << endmsg;
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}
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return false;
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}
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void
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Session::sync_time_vars ()
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{
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_current_frame_rate = (nframes_t) round (_base_frame_rate * (1.0 + (config.get_video_pullup()/100.0)));
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_frames_per_timecode_frame = (double) _current_frame_rate / (double) timecode_frames_per_second();
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if (timecode_drop_frames()) {
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_frames_per_hour = (long)(107892 * _frames_per_timecode_frame);
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} else {
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_frames_per_hour = (long)(3600 * rint(timecode_frames_per_second()) * _frames_per_timecode_frame);
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}
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_timecode_frames_per_hour = (nframes_t)rint(timecode_frames_per_second() * 3600.0);
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last_timecode_valid = false;
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// timecode type bits are the middle two in the upper nibble
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switch ((int) ceil (timecode_frames_per_second())) {
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case 24:
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mtc_timecode_bits = 0;
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break;
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case 25:
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mtc_timecode_bits = 0x20;
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break;
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case 30:
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default:
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if (timecode_drop_frames()) {
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mtc_timecode_bits = 0x40;
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} else {
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mtc_timecode_bits = 0x60;
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}
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break;
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};
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}
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void
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Session::set_timecode_offset (nframes_t off)
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{
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_timecode_offset = off;
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last_timecode_valid = false;
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TimecodeOffsetChanged (); /* EMIT SIGNAL */
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}
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void
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Session::set_timecode_offset_negative (bool neg)
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{
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_timecode_offset_negative = neg;
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last_timecode_valid = false;
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TimecodeOffsetChanged (); /* EMIT SIGNAL */
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}
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void
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Session::timecode_to_sample( Timecode::Time& timecode, nframes_t& sample, bool use_offset, bool use_subframes ) const
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{
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if (timecode.drop) {
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// The drop frame format was created to better approximate the 30000/1001 = 29.97002997002997....
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// framerate of NTSC color TV. The used frame rate of drop frame is 29.97, which drifts by about
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// 0.108 frame per hour, or about 1.3 frames per 12 hours. This is not perfect, but a lot better
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// than using 30 non drop, which will drift with about 1.8 frame per minute.
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// Using 29.97, drop frame real time can be accurate only every 10th minute (10 minutes of 29.97 fps
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// is exactly 17982 frames). One minute is 1798.2 frames, but we count 30 frames per second
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// (30 * 60 = 1800). This means that at the first minute boundary (at the end of 0:0:59:29) we
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// are 1.8 frames too late relative to real time. By dropping 2 frames (jumping to 0:1:0:2) we are
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// approx. 0.2 frames too early. This adds up with 0.2 too early for each minute until we are 1.8
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// frames too early at 0:9:0:2 (9 * 0.2 = 1.8). The 10th minute brings us 1.8 frames later again
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// (at end of 0:9:59:29), which sums up to 0 (we are back to zero at 0:10:0:0 :-).
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//
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// In table form:
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//
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// Timecode value frames offset subframes offset seconds (rounded) 44100 sample (rounded)
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// 0:00:00:00 0.0 0 0.000 0 (accurate)
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// 0:00:59:29 1.8 144 60.027 2647177
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// 0:01:00:02 -0.2 -16 60.060 2648648
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// 0:01:59:29 1.6 128 120.020 5292883
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// 0:02:00:02 -0.4 -32 120.053 5294354
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// 0:02:59:29 1.4 112 180.013 7938588
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// 0:03:00:02 -0.6 -48 180.047 7940060
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// 0:03:59:29 1.2 96 240.007 10584294
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// 0:04:00:02 -0.8 -64 240.040 10585766
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// 0:04:59:29 1.0 80 300.000 13230000
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// 0:05:00:02 -1.0 -80 300.033 13231471
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// 0:05:59:29 0.8 64 359.993 15875706
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// 0:06:00:02 -1.2 -96 360.027 15877177
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// 0:06:59:29 0.6 48 419.987 18521411
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// 0:07:00:02 -1.4 -112 420.020 18522883
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// 0:07:59:29 0.4 32 478.980 21167117
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// 0:08:00:02 -1.6 -128 480.013 21168589
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// 0:08:59:29 0.2 16 539.973 23812823
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// 0:09:00:02 -1.8 -144 540.007 23814294
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// 0:09:59:29 0.0+ 0+ 599.967 26458529
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// 0:10:00:00 0.0 0 600.000 26460000 (accurate)
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//
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// Per Sigmond <per@sigmond.no>
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// Samples inside time dividable by 10 minutes (real time accurate)
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nframes_t base_samples = (nframes_t) (((timecode.hours * 107892) + ((timecode.minutes / 10) * 17982)) * _frames_per_timecode_frame);
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// Samples inside time exceeding the nearest 10 minutes (always offset, see above)
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long exceeding_df_minutes = timecode.minutes % 10;
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long exceeding_df_seconds = (exceeding_df_minutes * 60) + timecode.seconds;
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long exceeding_df_frames = (30 * exceeding_df_seconds) + timecode.frames - (2 * exceeding_df_minutes);
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nframes_t exceeding_samples = (nframes_t) rint(exceeding_df_frames * _frames_per_timecode_frame);
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sample = base_samples + exceeding_samples;
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} else {
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/*
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Non drop is easy.. just note the use of
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rint(timecode.rate) * _frames_per_timecode_frame
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(frames per Timecode second), which is larger than
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frame_rate() in the non-integer Timecode rate case.
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*/
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sample = (nframes_t)rint((((timecode.hours * 60 * 60) + (timecode.minutes * 60) + timecode.seconds) * (rint(timecode.rate) * _frames_per_timecode_frame)) + (timecode.frames * _frames_per_timecode_frame));
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}
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if (use_subframes) {
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sample += (long) (((double)timecode.subframes * _frames_per_timecode_frame) / config.get_subframes_per_frame());
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}
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if (use_offset) {
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if (timecode_offset_negative()) {
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if (sample >= timecode_offset()) {
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sample -= timecode_offset();
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} else {
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/* Prevent song-time from becoming negative */
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sample = 0;
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}
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} else {
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if (timecode.negative) {
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if (sample <= timecode_offset()) {
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sample = timecode_offset() - sample;
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} else {
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sample = 0;
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}
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} else {
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sample += timecode_offset();
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}
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}
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}
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}
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void
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Session::sample_to_timecode( nframes_t sample, Timecode::Time& timecode, bool use_offset, bool use_subframes ) const
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{
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nframes_t offset_sample;
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if (!use_offset) {
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offset_sample = sample;
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timecode.negative = false;
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} else {
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if (_timecode_offset_negative) {
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offset_sample = sample + _timecode_offset;
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timecode.negative = false;
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} else {
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if (sample < _timecode_offset) {
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offset_sample = (_timecode_offset - sample);
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timecode.negative = true;
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} else {
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offset_sample = sample - _timecode_offset;
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timecode.negative = false;
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}
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}
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}
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double timecode_frames_left_exact;
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double timecode_frames_fraction;
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unsigned long timecode_frames_left;
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// Extract whole hours. Do this to prevent rounding errors with
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// high sample numbers in the calculations that follow.
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timecode.hours = offset_sample / _frames_per_hour;
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offset_sample = offset_sample % _frames_per_hour;
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// Calculate exact number of (exceeding) timecode frames and fractional frames
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timecode_frames_left_exact = (double) offset_sample / _frames_per_timecode_frame;
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timecode_frames_fraction = timecode_frames_left_exact - floor( timecode_frames_left_exact );
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timecode.subframes = (long) rint(timecode_frames_fraction * config.get_subframes_per_frame());
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// XXX Not sure if this is necessary anymore...
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if (timecode.subframes == config.get_subframes_per_frame()) {
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// This can happen with 24 fps (and 29.97 fps ?)
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timecode_frames_left_exact = ceil( timecode_frames_left_exact );
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timecode.subframes = 0;
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}
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// Extract hour-exceeding frames for minute, second and frame calculations
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timecode_frames_left = ((long) floor( timecode_frames_left_exact ));
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if (timecode_drop_frames()) {
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// See long explanation in timecode_to_sample()...
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// Number of 10 minute chunks
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timecode.minutes = (timecode_frames_left / 17982) * 10; // exactly 17982 frames in 10 minutes
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// frames exceeding the nearest 10 minute barrier
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long exceeding_df_frames = timecode_frames_left % 17982;
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// Find minutes exceeding the nearest 10 minute barrier
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if (exceeding_df_frames >= 1800) { // nothing to do if we are inside the first minute (0-1799)
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exceeding_df_frames -= 1800; // take away first minute (different number of frames than the others)
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long extra_minutes_minus_1 = exceeding_df_frames / 1798; // how many minutes after the first one
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exceeding_df_frames -= extra_minutes_minus_1 * 1798; // take away the (extra) minutes just found
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timecode.minutes += extra_minutes_minus_1 + 1; // update with exceeding minutes
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}
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// Adjust frame numbering for dropped frames (frame 0 and 1 skipped at start of every minute except every 10th)
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if (timecode.minutes % 10) {
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// Every minute except every 10th
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if (exceeding_df_frames < 28) {
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// First second, frames 0 and 1 are skipped
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timecode.seconds = 0;
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timecode.frames = exceeding_df_frames + 2;
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} else {
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// All other seconds, all 30 frames are counted
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exceeding_df_frames -= 28;
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timecode.seconds = (exceeding_df_frames / 30) + 1;
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timecode.frames = exceeding_df_frames % 30;
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}
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} else {
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// Every 10th minute, all 30 frames counted in all seconds
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timecode.seconds = exceeding_df_frames / 30;
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timecode.frames = exceeding_df_frames % 30;
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}
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} else {
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// Non drop is easy
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timecode.minutes = timecode_frames_left / ((long) rint (timecode_frames_per_second ()) * 60);
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timecode_frames_left = timecode_frames_left % ((long) rint (timecode_frames_per_second ()) * 60);
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timecode.seconds = timecode_frames_left / (long) rint(timecode_frames_per_second ());
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timecode.frames = timecode_frames_left % (long) rint(timecode_frames_per_second ());
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}
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if (!use_subframes) {
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timecode.subframes = 0;
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}
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/* set frame rate and drop frame */
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timecode.rate = timecode_frames_per_second ();
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timecode.drop = timecode_drop_frames();
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}
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void
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Session::timecode_time (nframes_t when, Timecode::Time& timecode)
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{
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if (last_timecode_valid && when == last_timecode_when) {
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timecode = last_timecode;
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return;
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}
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sample_to_timecode( when, timecode, true /* use_offset */, false /* use_subframes */ );
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last_timecode_when = when;
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last_timecode = timecode;
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last_timecode_valid = true;
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}
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void
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Session::timecode_time_subframes (nframes_t when, Timecode::Time& timecode)
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{
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if (last_timecode_valid && when == last_timecode_when) {
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timecode = last_timecode;
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return;
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}
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sample_to_timecode( when, timecode, true /* use_offset */, true /* use_subframes */ );
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last_timecode_when = when;
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last_timecode = timecode;
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last_timecode_valid = true;
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}
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void
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Session::timecode_duration (nframes_t when, Timecode::Time& timecode) const
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{
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sample_to_timecode( when, timecode, false /* use_offset */, true /* use_subframes */ );
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}
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void
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Session::timecode_duration_string (char* buf, nframes_t when) const
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{
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Timecode::Time timecode;
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timecode_duration (when, timecode);
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snprintf (buf, sizeof (buf), "%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32, timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
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}
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void
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Session::timecode_time (Timecode::Time &t)
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{
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timecode_time (_transport_frame, t);
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}
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int
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Session::jack_sync_callback (jack_transport_state_t state,
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jack_position_t* pos)
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{
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bool slave = synced_to_jack();
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switch (state) {
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case JackTransportStopped:
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if (slave && _transport_frame != pos->frame && post_transport_work() == 0) {
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request_locate (pos->frame, false);
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// cerr << "SYNC: stopped, locate to " << pos->frame << " from " << _transport_frame << endl;
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return false;
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} else {
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return true;
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}
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case JackTransportStarting:
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// cerr << "SYNC: starting @ " << pos->frame << " a@ " << _transport_frame << " our work = " << post_transport_work() << " pos matches ? " << (_transport_frame == pos->frame) << endl;
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if (slave) {
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return _transport_frame == pos->frame && post_transport_work() == 0;
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} else {
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return true;
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}
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break;
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case JackTransportRolling:
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// cerr << "SYNC: rolling slave = " << slave << endl;
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if (slave) {
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start_transport ();
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}
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break;
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default:
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error << string_compose (_("Unknown JACK transport state %1 in sync callback"), state)
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<< endmsg;
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}
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return true;
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}
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void
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Session::jack_timebase_callback (jack_transport_state_t /*state*/,
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nframes_t /*nframes*/,
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jack_position_t* pos,
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int /*new_position*/)
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{
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BBT_Time bbt;
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/* frame info */
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pos->frame = _transport_frame;
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pos->valid = JackPositionTimecode;
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/* BBT info */
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if (_tempo_map) {
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TempoMetric metric (_tempo_map->metric_at (_transport_frame));
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_tempo_map->bbt_time_with_metric (_transport_frame, bbt, metric);
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pos->bar = bbt.bars;
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pos->beat = bbt.beats;
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pos->tick = bbt.ticks;
|
|
|
|
// XXX still need to set bar_start_tick
|
|
|
|
pos->beats_per_bar = metric.meter().beats_per_bar();
|
|
pos->beat_type = metric.meter().note_divisor();
|
|
pos->ticks_per_beat = Meter::ticks_per_beat;
|
|
pos->beats_per_minute = metric.tempo().beats_per_minute();
|
|
|
|
pos->valid = jack_position_bits_t (pos->valid | JackPositionBBT);
|
|
}
|
|
|
|
#ifdef HAVE_JACK_VIDEO_SUPPORT
|
|
//poke audio video ratio so Ardour can track Video Sync
|
|
pos->audio_frames_per_video_frame = frame_rate() / timecode_frames_per_second();
|
|
pos->valid = jack_position_bits_t (pos->valid | JackAudioVideoRatio);
|
|
#endif
|
|
|
|
#if 0
|
|
/* Timecode info */
|
|
|
|
t.timecode_offset = _timecode_offset;
|
|
t.timecode_frame_rate = timecode_frames_per_second();
|
|
|
|
if (_transport_speed) {
|
|
|
|
if (play_loop) {
|
|
|
|
Location* location = _locations.auto_loop_location();
|
|
|
|
if (location) {
|
|
|
|
t.transport_state = JackTransportLooping;
|
|
t.loop_start = location->start();
|
|
t.loop_end = location->end();
|
|
t.valid = jack_transport_bits_t (t.valid | JackTransportLoop);
|
|
|
|
} else {
|
|
|
|
t.loop_start = 0;
|
|
t.loop_end = 0;
|
|
t.transport_state = JackTransportRolling;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
t.loop_start = 0;
|
|
t.loop_end = 0;
|
|
t.transport_state = JackTransportRolling;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
}
|
|
|
|
ARDOUR::nframes_t
|
|
Session::convert_to_frames_at (nframes_t /*position*/, AnyTime const & any)
|
|
{
|
|
double secs;
|
|
|
|
switch (any.type) {
|
|
case AnyTime::BBT:
|
|
return _tempo_map->frame_time ( any.bbt);
|
|
break;
|
|
|
|
case AnyTime::Timecode:
|
|
/* XXX need to handle negative values */
|
|
secs = any.timecode.hours * 60 * 60;
|
|
secs += any.timecode.minutes * 60;
|
|
secs += any.timecode.seconds;
|
|
secs += any.timecode.frames / timecode_frames_per_second();
|
|
if (_timecode_offset_negative)
|
|
{
|
|
return (nframes_t) floor (secs * frame_rate()) - _timecode_offset;
|
|
}
|
|
else
|
|
{
|
|
return (nframes_t) floor (secs * frame_rate()) + _timecode_offset;
|
|
}
|
|
break;
|
|
|
|
case AnyTime::Seconds:
|
|
return (nframes_t) floor (any.seconds * frame_rate());
|
|
break;
|
|
|
|
case AnyTime::Frames:
|
|
return any.frames;
|
|
break;
|
|
}
|
|
|
|
return any.frames;
|
|
}
|