void
Session::timecode_to_sample( Timecode::Time& timecode, framepos_t& sample, bool use_offset, bool use_subframes ) const
{
- double my_frames_per_timecode_frame = _frames_per_timecode_frame;
- if (timecode.rate > 0) {
- my_frames_per_timecode_frame = (double) _current_frame_rate / (double) timecode.rate;
- }
+ timecode.rate = timecode_frames_per_second();
- if (timecode.drop) {
- // The drop frame format was created to better approximate the 30000/1001 = 29.97002997002997....
- // framerate of NTSC color TV. The used frame rate of drop frame is 29.97, which drifts by about
- // 0.108 frame per hour, or about 1.3 frames per 12 hours. This is not perfect, but a lot better
- // than using 30 non drop, which will drift with about 1.8 frame per minute.
- // Using 29.97, drop frame real time can be accurate only every 10th minute (10 minutes of 29.97 fps
- // is exactly 17982 frames). One minute is 1798.2 frames, but we count 30 frames per second
- // (30 * 60 = 1800). This means that at the first minute boundary (at the end of 0:0:59:29) we
- // are 1.8 frames too late relative to real time. By dropping 2 frames (jumping to 0:1:0:2) we are
- // approx. 0.2 frames too early. This adds up with 0.2 too early for each minute until we are 1.8
- // frames too early at 0:9:0:2 (9 * 0.2 = 1.8). The 10th minute brings us 1.8 frames later again
- // (at end of 0:9:59:29), which sums up to 0 (we are back to zero at 0:10:0:0 :-).
- //
- // In table form:
- //
- // Timecode value frames offset subframes offset seconds (rounded) 44100 sample (rounded)
- // 0:00:00:00 0.0 0 0.000 0 (accurate)
- // 0:00:59:29 1.8 144 60.027 2647177
- // 0:01:00:02 -0.2 -16 60.060 2648648
- // 0:01:59:29 1.6 128 120.020 5292883
- // 0:02:00:02 -0.4 -32 120.053 5294354
- // 0:02:59:29 1.4 112 180.013 7938588
- // 0:03:00:02 -0.6 -48 180.047 7940060
- // 0:03:59:29 1.2 96 240.007 10584294
- // 0:04:00:02 -0.8 -64 240.040 10585766
- // 0:04:59:29 1.0 80 300.000 13230000
- // 0:05:00:02 -1.0 -80 300.033 13231471
- // 0:05:59:29 0.8 64 359.993 15875706
- // 0:06:00:02 -1.2 -96 360.027 15877177
- // 0:06:59:29 0.6 48 419.987 18521411
- // 0:07:00:02 -1.4 -112 420.020 18522883
- // 0:07:59:29 0.4 32 478.980 21167117
- // 0:08:00:02 -1.6 -128 480.013 21168589
- // 0:08:59:29 0.2 16 539.973 23812823
- // 0:09:00:02 -1.8 -144 540.007 23814294
- // 0:09:59:29 0.0+ 0+ 599.967 26458529
- // 0:10:00:00 0.0 0 600.000 26460000 (accurate)
- //
- // Per Sigmond <per@sigmond.no>
-
- // Samples inside time dividable by 10 minutes (real time accurate)
- framecnt_t base_samples = (framecnt_t) (((timecode.hours * 107892) + ((timecode.minutes / 10) * 17982)) * my_frames_per_timecode_frame);
-
- // Samples inside time exceeding the nearest 10 minutes (always offset, see above)
- int32_t exceeding_df_minutes = timecode.minutes % 10;
- int32_t exceeding_df_seconds = (exceeding_df_minutes * 60) + timecode.seconds;
- int32_t exceeding_df_frames = (30 * exceeding_df_seconds) + timecode.frames - (2 * exceeding_df_minutes);
- framecnt_t exceeding_samples = (framecnt_t) rint(exceeding_df_frames * my_frames_per_timecode_frame);
- sample = base_samples + exceeding_samples;
- } else {
- /*
- Non drop is easy.. just note the use of
- rint(timecode.rate) * _frames_per_timecode_frame
- (frames per Timecode second), which is larger than
- frame_rate() in the non-integer Timecode rate case.
- */
-
- sample = (framecnt_t)rint((((timecode.hours * 60 * 60) + (timecode.minutes * 60) + timecode.seconds) * (rint(timecode.rate) * my_frames_per_timecode_frame)) + (timecode.frames * my_frames_per_timecode_frame));
- }
-
- if (use_subframes) {
- sample += (int32_t) (((double)timecode.subframes * my_frames_per_timecode_frame) / config.get_subframes_per_frame());
- }
-
- if (use_offset) {
- if (config.get_timecode_offset_negative()) {
- if (sample >= config.get_timecode_offset()) {
- sample -= config.get_timecode_offset();
- } else {
- /* Prevent song-time from becoming negative */
- sample = 0;
- }
- } else {
- if (timecode.negative) {
- if (sample <= config.get_timecode_offset()) {
- sample = config.get_timecode_offset() - sample;
- } else {
- sample = 0;
- }
- } else {
- sample += config.get_timecode_offset();
- }
- }
- }
+ Timecode::timecode_to_sample(
+ timecode, sample, use_offset, use_subframes,
+ _current_frame_rate,
+ config.get_subframes_per_frame(),
+ config.get_timecode_offset_negative(), config.get_timecode_offset()
+ );
}
-
void
Session::sample_to_timecode (framepos_t sample, Timecode::Time& timecode, bool use_offset, bool use_subframes ) const
{
- framepos_t offset_sample;
-
- if (!use_offset) {
- offset_sample = sample;
- timecode.negative = false;
- } else {
- if (config.get_timecode_offset_negative()) {
- offset_sample = sample + config.get_timecode_offset ();
- timecode.negative = false;
- } else {
- if (sample < config.get_timecode_offset()) {
- offset_sample = (config.get_timecode_offset() - sample);
- timecode.negative = true;
- } else {
- offset_sample = sample - config.get_timecode_offset();
- timecode.negative = false;
- }
- }
- }
-
- double timecode_frames_left_exact;
- double timecode_frames_fraction;
- uint32_t timecode_frames_left;
-
- // Extract whole hours. Do this to prevent rounding errors with
- // high sample numbers in the calculations that follow.
- timecode.hours = offset_sample / _frames_per_hour;
- offset_sample = offset_sample % _frames_per_hour;
-
- // Calculate exact number of (exceeding) timecode frames and fractional frames
- timecode_frames_left_exact = (double) offset_sample / _frames_per_timecode_frame;
- timecode_frames_fraction = timecode_frames_left_exact - floor( timecode_frames_left_exact );
- timecode.subframes = (int32_t) rint(timecode_frames_fraction * config.get_subframes_per_frame());
-
- // XXX Not sure if this is necessary anymore...
- if (timecode.subframes == config.get_subframes_per_frame()) {
- // This can happen with 24 fps (and 29.97 fps ?)
- timecode_frames_left_exact = ceil( timecode_frames_left_exact );
- timecode.subframes = 0;
- }
-
- // Extract hour-exceeding frames for minute, second and frame calculations
- timecode_frames_left = (uint32_t) floor (timecode_frames_left_exact);
-
- if (timecode_drop_frames()) {
- // See int32_t explanation in timecode_to_sample()...
-
- // Number of 10 minute chunks
- timecode.minutes = (timecode_frames_left / 17982) * 10; // exactly 17982 frames in 10 minutes
- // frames exceeding the nearest 10 minute barrier
- int32_t exceeding_df_frames = timecode_frames_left % 17982;
-
- // Find minutes exceeding the nearest 10 minute barrier
- if (exceeding_df_frames >= 1800) { // nothing to do if we are inside the first minute (0-1799)
- exceeding_df_frames -= 1800; // take away first minute (different number of frames than the others)
- int32_t extra_minutes_minus_1 = exceeding_df_frames / 1798; // how many minutes after the first one
- exceeding_df_frames -= extra_minutes_minus_1 * 1798; // take away the (extra) minutes just found
- timecode.minutes += extra_minutes_minus_1 + 1; // update with exceeding minutes
- }
+ Timecode::sample_to_timecode (
+ sample, timecode, use_offset, use_subframes,
- // Adjust frame numbering for dropped frames (frame 0 and 1 skipped at start of every minute except every 10th)
- if (timecode.minutes % 10) {
- // Every minute except every 10th
- if (exceeding_df_frames < 28) {
- // First second, frames 0 and 1 are skipped
- timecode.seconds = 0;
- timecode.frames = exceeding_df_frames + 2;
- } else {
- // All other seconds, all 30 frames are counted
- exceeding_df_frames -= 28;
- timecode.seconds = (exceeding_df_frames / 30) + 1;
- timecode.frames = exceeding_df_frames % 30;
- }
- } else {
- // Every 10th minute, all 30 frames counted in all seconds
- timecode.seconds = exceeding_df_frames / 30;
- timecode.frames = exceeding_df_frames % 30;
- }
- } else {
- // Non drop is easy
- timecode.minutes = timecode_frames_left / ((int32_t) rint (timecode_frames_per_second ()) * 60);
- timecode_frames_left = timecode_frames_left % ((int32_t) rint (timecode_frames_per_second ()) * 60);
- timecode.seconds = timecode_frames_left / (int32_t) rint(timecode_frames_per_second ());
- timecode.frames = timecode_frames_left % (int32_t) rint(timecode_frames_per_second ());
- }
+ timecode_frames_per_second(),
+ timecode_drop_frames(),
+ double(_current_frame_rate),
- if (!use_subframes) {
- timecode.subframes = 0;
- }
- /* set frame rate and drop frame */
- timecode.rate = timecode_frames_per_second ();
- timecode.drop = timecode_drop_frames();
+ config.get_subframes_per_frame(),
+ config.get_timecode_offset_negative(), config.get_timecode_offset()
+ );
}
void
return;
}
- sample_to_timecode( when, timecode, true /* use_offset */, false /* use_subframes */ );
+ this->sample_to_timecode( when, timecode, true /* use_offset */, false /* use_subframes */ );
last_timecode_when = when;
last_timecode = timecode;
return;
}
- sample_to_timecode( when, timecode, true /* use_offset */, true /* use_subframes */ );
+ this->sample_to_timecode( when, timecode, true /* use_offset */, true /* use_subframes */ );
last_timecode_when = when;
last_timecode = timecode;
void
Session::timecode_duration (framecnt_t when, Timecode::Time& timecode) const
{
- sample_to_timecode( when, timecode, false /* use_offset */, true /* use_subframes */ );
+ this->sample_to_timecode( when, timecode, false /* use_offset */, true /* use_subframes */ );
}
void
#define Timecode_IS_ZERO(sm) (!(sm).frames && !(sm).seconds && !(sm).minutes && !(sm).hours && !(sm.subframes))
#include <math.h>
+#include <stdio.h>
#include "timecode/time.h"
return "??";
}
+std::string timecode_format_time (Timecode::Time& TC)
+{
+ char buf[32];
+ if (TC.negative) {
+ snprintf (buf, sizeof (buf), "-%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32, TC.hours, TC.minutes, TC.seconds, TC.frames);
+ } else {
+ snprintf (buf, sizeof (buf), " %02" PRIu32 ":%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32, TC.hours, TC.minutes, TC.seconds, TC.frames);
+ }
+ return std::string(buf);
+}
+
+std::string timecode_format_sampletime (
+ int64_t sample,
+ double sample_frame_rate,
+ double timecode_frames_per_second, bool timecode_drop_frames)
+{
+ Time t;
+ sample_to_timecode(
+ sample, t, false, false,
+ timecode_frames_per_second, timecode_drop_frames,
+ sample_frame_rate,
+ 80, false, 0);
+ return timecode_format_time(t);
+}
+
+void
+timecode_to_sample(
+ Timecode::Time& timecode, int64_t& sample,
+ bool use_offset, bool use_subframes,
+ /* Note - framerate info is taken from Timecode::Time& */
+ double sample_frame_rate /**< may include pull up/down */,
+ int32_t subframes_per_frame,
+ /* optional offset - can be improved: function pointer to lazily query this*/
+ bool offset_is_negative, int64_t offset_samples
+ )
+{
+ const double frames_per_timecode_frame = (double) sample_frame_rate / (double) timecode.rate;
+
+ if (timecode.drop) {
+ // The drop frame format was created to better approximate the 30000/1001 = 29.97002997002997....
+ // framerate of NTSC color TV. The used frame rate of drop frame is 29.97, which drifts by about
+ // 0.108 frame per hour, or about 1.3 frames per 12 hours. This is not perfect, but a lot better
+ // than using 30 non drop, which will drift with about 1.8 frame per minute.
+ // Using 29.97, drop frame real time can be accurate only every 10th minute (10 minutes of 29.97 fps
+ // is exactly 17982 frames). One minute is 1798.2 frames, but we count 30 frames per second
+ // (30 * 60 = 1800). This means that at the first minute boundary (at the end of 0:0:59:29) we
+ // are 1.8 frames too late relative to real time. By dropping 2 frames (jumping to 0:1:0:2) we are
+ // approx. 0.2 frames too early. This adds up with 0.2 too early for each minute until we are 1.8
+ // frames too early at 0:9:0:2 (9 * 0.2 = 1.8). The 10th minute brings us 1.8 frames later again
+ // (at end of 0:9:59:29), which sums up to 0 (we are back to zero at 0:10:0:0 :-).
+ //
+ // In table form:
+ //
+ // Timecode value frames offset subframes offset seconds (rounded) 44100 sample (rounded)
+ // 0:00:00:00 0.0 0 0.000 0 (accurate)
+ // 0:00:59:29 1.8 144 60.027 2647177
+ // 0:01:00:02 -0.2 -16 60.060 2648648
+ // 0:01:59:29 1.6 128 120.020 5292883
+ // 0:02:00:02 -0.4 -32 120.053 5294354
+ // 0:02:59:29 1.4 112 180.013 7938588
+ // 0:03:00:02 -0.6 -48 180.047 7940060
+ // 0:03:59:29 1.2 96 240.007 10584294
+ // 0:04:00:02 -0.8 -64 240.040 10585766
+ // 0:04:59:29 1.0 80 300.000 13230000
+ // 0:05:00:02 -1.0 -80 300.033 13231471
+ // 0:05:59:29 0.8 64 359.993 15875706
+ // 0:06:00:02 -1.2 -96 360.027 15877177
+ // 0:06:59:29 0.6 48 419.987 18521411
+ // 0:07:00:02 -1.4 -112 420.020 18522883
+ // 0:07:59:29 0.4 32 478.980 21167117
+ // 0:08:00:02 -1.6 -128 480.013 21168589
+ // 0:08:59:29 0.2 16 539.973 23812823
+ // 0:09:00:02 -1.8 -144 540.007 23814294
+ // 0:09:59:29 0.0+ 0+ 599.967 26458529
+ // 0:10:00:00 0.0 0 600.000 26460000 (accurate)
+ //
+ // Per Sigmond <per@sigmond.no>
+
+ // Samples inside time dividable by 10 minutes (real time accurate)
+ int64_t base_samples = (int64_t) (((timecode.hours * 107892) + ((timecode.minutes / 10) * 17982)) * frames_per_timecode_frame);
+
+ // Samples inside time exceeding the nearest 10 minutes (always offset, see above)
+ int32_t exceeding_df_minutes = timecode.minutes % 10;
+ int32_t exceeding_df_seconds = (exceeding_df_minutes * 60) + timecode.seconds;
+ int32_t exceeding_df_frames = (30 * exceeding_df_seconds) + timecode.frames - (2 * exceeding_df_minutes);
+ int64_t exceeding_samples = (int64_t) rint(exceeding_df_frames * frames_per_timecode_frame);
+ sample = base_samples + exceeding_samples;
+ } else {
+ /*
+ Non drop is easy.. just note the use of
+ rint(timecode.rate) * frames_per_timecode_frame
+ (frames per Timecode second), which is larger than
+ frame_rate() in the non-integer Timecode rate case.
+ */
+
+ sample = (int64_t)rint((((timecode.hours * 60 * 60) + (timecode.minutes * 60) + timecode.seconds) * (rint(timecode.rate) * frames_per_timecode_frame)) + (timecode.frames * frames_per_timecode_frame));
+ }
+
+ if (use_subframes) {
+ sample += (int64_t) (((double)timecode.subframes * frames_per_timecode_frame) / subframes_per_frame);
+ }
+
+ if (use_offset) {
+ if (offset_is_negative) {
+ if (sample >= offset_samples) {
+ sample -= offset_samples;
+ } else {
+ /* Prevent song-time from becoming negative */
+ sample = 0;
+ }
+ } else {
+ if (timecode.negative) {
+ if (sample <= offset_samples) {
+ sample = offset_samples - sample;
+ } else {
+ sample = 0;
+ }
+ } else {
+ sample += offset_samples;
+ }
+ }
+ }
+}
+
+
+void
+sample_to_timecode (
+ int64_t sample, Timecode::Time& timecode,
+ bool use_offset, bool use_subframes,
+ /* framerate info */
+ double timecode_frames_per_second,
+ bool timecode_drop_frames,
+ double sample_frame_rate/**< can include pull up/down */,
+ int32_t subframes_per_frame,
+ /* optional offset - can be improved: function pointer to lazily query this*/
+ bool offset_is_negative, int64_t offset_samples
+ )
+{
+ const double frames_per_timecode_frame = (double) sample_frame_rate / (double) timecode_frames_per_second;
+ int32_t frames_per_hour;
+
+ if (timecode_drop_frames) {
+ frames_per_hour = (int32_t)(107892 * frames_per_timecode_frame);
+ } else {
+ frames_per_hour = (int32_t)(3600 * rint(timecode_frames_per_second) * frames_per_timecode_frame);
+ }
+
+ /* do the work */
+ int64_t offset_sample;
+
+ if (!use_offset) {
+ offset_sample = sample;
+ timecode.negative = false;
+ } else {
+ if (offset_is_negative) {
+ offset_sample = sample + offset_samples;
+ timecode.negative = false;
+ } else {
+ if (sample < offset_samples) {
+ offset_sample = (offset_samples - sample);
+ timecode.negative = true;
+ } else {
+ offset_sample = sample - offset_samples;
+ timecode.negative = false;
+ }
+ }
+ }
+
+ double timecode_frames_left_exact;
+ double timecode_frames_fraction;
+ uint64_t timecode_frames_left;
+
+ // Extract whole hours. Do this to prevent rounding errors with
+ // high sample numbers in the calculations that follow.
+ timecode.hours = offset_sample / frames_per_hour;
+ offset_sample = offset_sample % frames_per_hour;
+
+ // Calculate exact number of (exceeding) timecode frames and fractional frames
+ timecode_frames_left_exact = (double) offset_sample / frames_per_timecode_frame;
+ timecode_frames_fraction = timecode_frames_left_exact - floor( timecode_frames_left_exact );
+ timecode.subframes = (int32_t) floor(timecode_frames_fraction * subframes_per_frame);
+
+ // XXX Not sure if this is necessary anymore...
+ if (timecode.subframes == subframes_per_frame) {
+ // This can happen with 24 fps (and 29.97 fps ?)
+ timecode_frames_left_exact = ceil( timecode_frames_left_exact );
+ timecode.subframes = 0;
+ }
+
+ // Extract hour-exceeding frames for minute, second and frame calculations
+ timecode_frames_left = (uint64_t) floor (timecode_frames_left_exact);
+
+ if (timecode_drop_frames) {
+ // See int32_t explanation in timecode_to_sample()...
+
+ // Number of 10 minute chunks
+ timecode.minutes = (timecode_frames_left / 17982) * 10; // exactly 17982 frames in 10 minutes
+ // frames exceeding the nearest 10 minute barrier
+ int32_t exceeding_df_frames = timecode_frames_left % 17982;
+
+ // Find minutes exceeding the nearest 10 minute barrier
+ if (exceeding_df_frames >= 1800) { // nothing to do if we are inside the first minute (0-1799)
+ exceeding_df_frames -= 1800; // take away first minute (different number of frames than the others)
+ int32_t extra_minutes_minus_1 = exceeding_df_frames / 1798; // how many minutes after the first one
+ exceeding_df_frames -= extra_minutes_minus_1 * 1798; // take away the (extra) minutes just found
+ timecode.minutes += extra_minutes_minus_1 + 1; // update with exceeding minutes
+ }
+
+ // Adjust frame numbering for dropped frames (frame 0 and 1 skipped at start of every minute except every 10th)
+ if (timecode.minutes % 10) {
+ // Every minute except every 10th
+ if (exceeding_df_frames < 28) {
+ // First second, frames 0 and 1 are skipped
+ timecode.seconds = 0;
+ timecode.frames = exceeding_df_frames + 2;
+ } else {
+ // All other seconds, all 30 frames are counted
+ exceeding_df_frames -= 28;
+ timecode.seconds = (exceeding_df_frames / 30) + 1;
+ timecode.frames = exceeding_df_frames % 30;
+ }
+ } else {
+ // Every 10th minute, all 30 frames counted in all seconds
+ timecode.seconds = exceeding_df_frames / 30;
+ timecode.frames = exceeding_df_frames % 30;
+ }
+ } else {
+ // Non drop is easy
+ timecode.minutes = timecode_frames_left / ((int32_t) rint (timecode_frames_per_second) * 60);
+ timecode_frames_left = timecode_frames_left % ((int32_t) rint (timecode_frames_per_second) * 60);
+ timecode.seconds = timecode_frames_left / (int32_t) rint(timecode_frames_per_second);
+ timecode.frames = timecode_frames_left % (int32_t) rint(timecode_frames_per_second);
+ }
+
+ if (!use_subframes) {
+ timecode.subframes = 0;
+ }
+ /* set frame rate and drop frame */
+ timecode.rate = timecode_frames_per_second;
+ timecode.drop = timecode_drop_frames;
+}
+
} // namespace Timecode
std::ostream&
std::string timecode_format_name (TimecodeFormat const t);
+std::string timecode_format_time (Timecode::Time& timecode);
+
+std::string timecode_format_sampletime (
+ int64_t sample,
+ double sample_frame_rate,
+ double timecode_frames_per_second, bool timecode_drop_frames
+ );
+
+void
+timecode_to_sample(
+ Timecode::Time& timecode, int64_t& sample,
+ bool use_offset, bool use_subframes,
+ /* Note - framerate info is taken from Timecode::Time& */
+ double sample_frame_rate /**< may include pull up/down */,
+ int32_t subframes_per_frame /**< must not be 0 if use_subframes==true */,
+ /* optional offset - can be improved: function pointer to lazily query this*/
+ bool offset_is_negative, int64_t offset_samples
+ );
+
+void sample_to_timecode (
+ int64_t sample, Timecode::Time& timecode,
+ bool use_offset, bool use_subframes,
+ /* framerate info */
+ double timecode_frames_per_second,
+ bool timecode_drop_frames,
+ double sample_frame_rate/**< can include pull up/down */,
+ int32_t subframes_per_frame,
+ /* optional offset - can be improved: function pointer to lazily query this*/
+ bool offset_is_negative, int64_t offset_samples
+ );
+
+
} // namespace Timecode
std::ostream& operator<< (std::ostream& ostr, const Timecode::Time& t);
projects / ardour.git / commitdiff