David McPaul added support for drop frame formats.
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@806 a95241bf-73f2-0310-859d-f6bbb57e9c96
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beveloper
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@ -1,7 +1,7 @@
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/***********************************************************************
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* AUTHOR: Marcus Overhagen, David McPaul
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* AUTHOR: David McPaul
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* FILE: TimeCode.cpp
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* DESCR:
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* DESCR: Handles all TimeCode functions.
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***********************************************************************/
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#include <TimeCode.h>
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#include "debug.h"
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@ -9,32 +9,188 @@
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status_t us_to_timecode(bigtime_t micros, int * hours, int * minutes, int * seconds, int * frames, const timecode_info * code = NULL)
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{
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UNIMPLEMENTED();
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return B_ERROR;
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int fps_div;
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int32 l_frames;
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CALLED();
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if (code) {
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// We have a valid timecode_info
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fps_div = code->fps_div;
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} else {
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fps_div = 25; // PAL Default
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}
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// Convert us to frames
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l_frames = (((micros % 1000) * fps_div) / 1000) + (micros / 1000 * fps_div);
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return frames_to_timecode(l_frames, hours, minutes, seconds, frames, code);
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}
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status_t timecode_to_us(int hours, int minutes, int seconds, int frames, bigtime_t * micros, const timecode_info * code = NULL)
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{
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UNIMPLEMENTED();
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int fps_div;
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int32 l_frames;
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CALLED();
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if (timecode_to_frames(hours, minutes, seconds, frames, &l_frames, code) == B_OK) {
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if (code) {
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// We have a valid timecode_info
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fps_div = code->fps_div;
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} else {
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fps_div = 25; // PAL Default
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}
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*micros = l_frames * 1000 / fps_div;
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return B_OK;
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}
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return B_ERROR;
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}
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status_t frames_to_timecode(int32 l_frames, int * hours, int * minutes, int * seconds, int * frames, const timecode_info * code = NULL)
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{
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UNIMPLEMENTED();
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return B_ERROR;
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int fps_div;
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int total_mins;
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int32 extra_frames;
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int32 extra_frames2;
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CALLED();
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if (code) {
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// We have a valid timecode_info so get the fps_div
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fps_div = code->fps_div;
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if (code->every_nth > 0) {
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// Handle Drop Frames format
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total_mins = l_frames / fps_div / 60;
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// "every_nth" minute we gain "drop_frames" "except_nth" minute
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extra_frames = code->drop_frames*(total_mins/code->every_nth) - code->drop_frames*(total_mins/code->except_nth);
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l_frames += extra_frames;
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total_mins = l_frames / fps_div / 60;
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extra_frames2 = code->drop_frames*(total_mins/code->every_nth) - code->drop_frames*(total_mins/code->except_nth);
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// Gaining frames may mean that we gain more frames so we keep adjusting until no more to adjust
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while (extra_frames != extra_frames2) {
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l_frames += extra_frames2 - extra_frames;
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extra_frames = extra_frames2;
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total_mins = l_frames / fps_div / 60;
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extra_frames2 = code->drop_frames*(total_mins/code->every_nth) - code->drop_frames*(total_mins/code->except_nth);
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}
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// l_frames should now include all adjusted frames
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}
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} else {
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// no timecode_info so set a default that doesn't use drop frames :-)
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fps_div = 25; // PAL Default
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}
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// convert frames to seconds leaving the remainder as frames
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*seconds = l_frames / fps_div; // DIV
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*frames = l_frames % fps_div; // MOD
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// Normalise to Hours Minutes Seconds Frames
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*minutes = *seconds / 60;
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*seconds = *seconds % 60;
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*hours = *minutes / 60;
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*minutes = *minutes % 60;
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return B_OK;
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}
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status_t timecode_to_frames(int hours, int minutes, int seconds, int frames, int32 * l_frames, const timecode_info * code = NULL)
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{
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UNIMPLEMENTED();
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return B_ERROR;
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int fps_div;
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int total_mins;
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int32 extra_frames;
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CALLED();
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if (code) {
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// We have a valid timecode_info
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fps_div = code->fps_div;
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total_mins = (hours * 60) + minutes;
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*l_frames = (total_mins * 60) + seconds;
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*l_frames = (*l_frames * fps_div) + frames;
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// Adjust "every_nth" minute we lose "drop_frames" "except_nth" minute
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if (code->every_nth > 0) {
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extra_frames = code->drop_frames*(total_mins/code->every_nth) - code->drop_frames*(total_mins/code->except_nth);
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*l_frames = *l_frames - extra_frames;
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}
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} else {
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*l_frames = (hours * 60) + minutes;
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*l_frames = (*l_frames * 60) + seconds;
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*l_frames = (*l_frames * 25) + frames;
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}
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return B_OK;
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}
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status_t get_timecode_description(timecode_type type, timecode_info * out_timecode)
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{
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UNIMPLEMENTED();
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return B_ERROR;
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CALLED();
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out_timecode->type = type;
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strncpy(out_timecode->format,"%.2i:%.2i:%.2i.%.2i",31);
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out_timecode->every_nth = 0;
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out_timecode->except_nth = 0;
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switch (type) {
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case B_TIMECODE_100:
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strncpy(out_timecode->name,"100 FPS",31);
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out_timecode->fps_div = 100;
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break;
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case B_TIMECODE_75: // CD
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strncpy(out_timecode->name,"CD",31);
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out_timecode->fps_div = 75;
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break;
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case B_TIMECODE_30: // MIDI
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strncpy(out_timecode->name,"MIDI",31);
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out_timecode->fps_div = 30;
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break;
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case B_TIMECODE_30_DROP_2: // NTSC
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strncpy(out_timecode->name,"NTSC",31);
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out_timecode->fps_div = 30; // This is supposed to be 29.97fps but can be simulated using the drop frame format below
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out_timecode->drop_frames = 2; // Drop 2 frames
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out_timecode->every_nth = 1; // every 1 minutes
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out_timecode->except_nth = 10; // except every 10 minutes
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break;
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case B_TIMECODE_30_DROP_4: // Brazil
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strncpy(out_timecode->name,"NTSC Brazil",31);
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out_timecode->fps_div = 30;
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out_timecode->drop_frames = 4; // Drop 4 frames
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out_timecode->every_nth = 1; // every 1 minutes
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out_timecode->except_nth = 10; // except every 10 minutes
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break;
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case B_TIMECODE_25: // PAL
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strncpy(out_timecode->name,"PAL",31);
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out_timecode->fps_div = 25;
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break;
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case B_TIMECODE_24: // Film
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strncpy(out_timecode->name,"FILM",31);
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out_timecode->fps_div = 24;
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break;
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case B_TIMECODE_18: // Super8
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strncpy(out_timecode->name,"Super 8",31);
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out_timecode->fps_div = 18;
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break;
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default:
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strncpy(out_timecode->name,"PAL",31);
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out_timecode->fps_div = 25;
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break;
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}
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return B_OK;
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}
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status_t count_timecodes()
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@ -110,90 +266,26 @@ status_t
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BTimeCode::SetType(timecode_type type)
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{
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CALLED();
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m_info.type = type;
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strncpy(m_info.format,"%.2i:%.2i:%.2i:%.2i",31);
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m_info.every_nth = 0;
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m_info.except_nth = 0;
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switch (type) {
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case B_TIMECODE_100:
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strncpy(m_info.name,"TIMECODE 100",31);
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m_info.fps_div = 100;
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break;
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case B_TIMECODE_75: // CD
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strncpy(m_info.name,"CD",31);
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m_info.fps_div = 75;
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break;
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case B_TIMECODE_30: // MIDI
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strncpy(m_info.name,"MIDI",31);
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m_info.fps_div = 30;
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break;
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case B_TIMECODE_30_DROP_2: // NTSC
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strncpy(m_info.name,"NTSC",31);
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m_info.fps_div = 30; // This is supposed to be 29.97fps
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m_info.drop_frames = 2; // Drop 2 frames every minute except every 10 minutes
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break;
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case B_TIMECODE_30_DROP_4: // Brazil
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strncpy(m_info.name,"NTSC Brazil",31);
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m_info.fps_div = 30;
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m_info.drop_frames = 4; // Drop 4 frames every minute except every 10 minutes
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break;
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case B_TIMECODE_25: // PAL
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strncpy(m_info.name,"PAL",31);
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m_info.fps_div = 25;
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break;
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case B_TIMECODE_24: // Film
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strncpy(m_info.name,"FILM",31);
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m_info.fps_div = 24;
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break;
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case B_TIMECODE_18: // Super8
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strncpy(m_info.name,"Super 8",31);
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m_info.fps_div = 18;
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break;
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default:
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SetType(B_TIMECODE_25); // PAL default :-)
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break;
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}
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return B_OK;
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return get_timecode_description(type, &m_info);
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}
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void
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BTimeCode::SetMicroseconds(bigtime_t us)
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{
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// Does not handle Drop formats correctly
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CALLED();
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m_seconds = us / 1000;
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m_frames = (us % 1000) / m_info.fps_div;
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// Now normalise to Hours Minutes Seconds
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m_minutes = m_seconds / 60;
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m_seconds = m_seconds % 60;
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m_hours = m_minutes / 60;
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m_minutes = m_minutes % 60;
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us_to_timecode(us, &m_hours, &m_minutes, &m_seconds, &m_frames, &m_info);
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}
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void
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BTimeCode::SetLinearFrames(int32 linear_frames)
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{
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// Does not handle Drop formats correctly
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CALLED();
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// First convert frames to seconds leaving the remainder as frames
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m_seconds = linear_frames / m_info.fps_div; // DIV
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m_frames = linear_frames % m_info.fps_div; // MOD
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// Now normalise to Hours Minutes Seconds
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m_minutes = m_seconds / 60;
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m_seconds = m_seconds % 60;
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m_hours = m_minutes / 60;
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m_minutes = m_minutes % 60;
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frames_to_timecode(linear_frames, &m_hours, &m_minutes, &m_seconds, &m_frames, &m_info);
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}
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@ -335,30 +427,30 @@ BTimeCode::GetData(int *out_hours,
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bigtime_t
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BTimeCode::Microseconds() const
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{
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bigtime_t us;
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CALLED();
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bigtime_t us;
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if (timecode_to_us(m_hours,m_minutes,m_seconds,m_frames, &us, &m_info) == B_OK) {
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return us;
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}
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us = m_hours*60+m_minutes;
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us = us*60+m_seconds;
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us = us*1000+m_frames*m_info.fps_div;
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return us;
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return 0;
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}
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int32
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BTimeCode::LinearFrames() const
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{
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CALLED();
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int32 linear_frames;
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CALLED();
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linear_frames = (m_hours * 60) + m_minutes;
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linear_frames = (linear_frames * 60) + m_seconds;
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linear_frames = (linear_frames * m_info.fps_div) + m_frames;
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return linear_frames;
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if (timecode_to_frames(m_hours,m_minutes,m_seconds,m_frames,&linear_frames,&m_info) == B_OK) {
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return linear_frames;
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}
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return 0;
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}
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@ -368,5 +460,3 @@ BTimeCode::GetString(char *str) const
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CALLED();
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sprintf(str,m_info.format, m_hours, m_minutes, m_seconds, m_frames);
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}
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