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Diffstat (limited to 'ffmpeg/libavutil/timecode.c')
-rw-r--r--ffmpeg/libavutil/timecode.c218
1 files changed, 0 insertions, 218 deletions
diff --git a/ffmpeg/libavutil/timecode.c b/ffmpeg/libavutil/timecode.c
deleted file mode 100644
index d396032..0000000
--- a/ffmpeg/libavutil/timecode.c
+++ /dev/null
@@ -1,218 +0,0 @@
-/*
- * Copyright (c) 2006 Smartjog S.A.S, Baptiste Coudurier <baptiste.coudurier@gmail.com>
- * Copyright (c) 2011-2012 Smartjog S.A.S, Clément Bœsch <clement.boesch@smartjog.com>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * Timecode helpers
- * @see https://en.wikipedia.org/wiki/SMPTE_time_code
- * @see http://www.dropframetimecode.org
- */
-
-#include <stdio.h>
-#include "timecode.h"
-#include "log.h"
-#include "error.h"
-
-int av_timecode_adjust_ntsc_framenum2(int framenum, int fps)
-{
- /* only works for NTSC 29.97 and 59.94 */
- int drop_frames = 0;
- int d, m, frames_per_10mins;
-
- if (fps == 30) {
- drop_frames = 2;
- frames_per_10mins = 17982;
- } else if (fps == 60) {
- drop_frames = 4;
- frames_per_10mins = 35964;
- } else
- return framenum;
-
- d = framenum / frames_per_10mins;
- m = framenum % frames_per_10mins;
-
- return framenum + 9 * drop_frames * d + drop_frames * ((m - drop_frames) / (frames_per_10mins / 10));
-}
-
-uint32_t av_timecode_get_smpte_from_framenum(const AVTimecode *tc, int framenum)
-{
- unsigned fps = tc->fps;
- int drop = !!(tc->flags & AV_TIMECODE_FLAG_DROPFRAME);
- int hh, mm, ss, ff;
-
- framenum += tc->start;
- if (drop)
- framenum = av_timecode_adjust_ntsc_framenum2(framenum, tc->fps);
- ff = framenum % fps;
- ss = framenum / fps % 60;
- mm = framenum / (fps*60) % 60;
- hh = framenum / (fps*3600) % 24;
- return 0 << 31 | // color frame flag (0: unsync mode, 1: sync mode)
- drop << 30 | // drop frame flag (0: non drop, 1: drop)
- (ff / 10) << 28 | // tens of frames
- (ff % 10) << 24 | // units of frames
- 0 << 23 | // PC (NTSC) or BGF0 (PAL)
- (ss / 10) << 20 | // tens of seconds
- (ss % 10) << 16 | // units of seconds
- 0 << 15 | // BGF0 (NTSC) or BGF2 (PAL)
- (mm / 10) << 12 | // tens of minutes
- (mm % 10) << 8 | // units of minutes
- 0 << 7 | // BGF2 (NTSC) or PC (PAL)
- 0 << 6 | // BGF1
- (hh / 10) << 4 | // tens of hours
- (hh % 10); // units of hours
-}
-
-char *av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum)
-{
- int fps = tc->fps;
- int drop = tc->flags & AV_TIMECODE_FLAG_DROPFRAME;
- int hh, mm, ss, ff, neg = 0;
-
- framenum += tc->start;
- if (drop)
- framenum = av_timecode_adjust_ntsc_framenum2(framenum, fps);
- if (framenum < 0) {
- framenum = -framenum;
- neg = tc->flags & AV_TIMECODE_FLAG_ALLOWNEGATIVE;
- }
- ff = framenum % fps;
- ss = framenum / fps % 60;
- mm = framenum / (fps*60) % 60;
- hh = framenum / (fps*3600);
- if (tc->flags & AV_TIMECODE_FLAG_24HOURSMAX)
- hh = hh % 24;
- snprintf(buf, AV_TIMECODE_STR_SIZE, "%s%02d:%02d:%02d%c%02d",
- neg ? "-" : "",
- hh, mm, ss, drop ? ';' : ':', ff);
- return buf;
-}
-
-static unsigned bcd2uint(uint8_t bcd)
-{
- unsigned low = bcd & 0xf;
- unsigned high = bcd >> 4;
- if (low > 9 || high > 9)
- return 0;
- return low + 10*high;
-}
-
-char *av_timecode_make_smpte_tc_string(char *buf, uint32_t tcsmpte, int prevent_df)
-{
- unsigned hh = bcd2uint(tcsmpte & 0x3f); // 6-bit hours
- unsigned mm = bcd2uint(tcsmpte>>8 & 0x7f); // 7-bit minutes
- unsigned ss = bcd2uint(tcsmpte>>16 & 0x7f); // 7-bit seconds
- unsigned ff = bcd2uint(tcsmpte>>24 & 0x3f); // 6-bit frames
- unsigned drop = tcsmpte & 1<<30 && !prevent_df; // 1-bit drop if not arbitrary bit
- snprintf(buf, AV_TIMECODE_STR_SIZE, "%02u:%02u:%02u%c%02u",
- hh, mm, ss, drop ? ';' : ':', ff);
- return buf;
-}
-
-char *av_timecode_make_mpeg_tc_string(char *buf, uint32_t tc25bit)
-{
- snprintf(buf, AV_TIMECODE_STR_SIZE, "%02u:%02u:%02u%c%02u",
- tc25bit>>19 & 0x1f, // 5-bit hours
- tc25bit>>13 & 0x3f, // 6-bit minutes
- tc25bit>>6 & 0x3f, // 6-bit seconds
- tc25bit & 1<<24 ? ';' : ':', // 1-bit drop flag
- tc25bit & 0x3f); // 6-bit frames
- return buf;
-}
-
-static int check_fps(int fps)
-{
- int i;
- static const int supported_fps[] = {24, 25, 30, 50, 60};
-
- for (i = 0; i < FF_ARRAY_ELEMS(supported_fps); i++)
- if (fps == supported_fps[i])
- return 0;
- return -1;
-}
-
-static int check_timecode(void *log_ctx, AVTimecode *tc)
-{
- if (tc->fps <= 0) {
- av_log(log_ctx, AV_LOG_ERROR, "Timecode frame rate must be specified\n");
- return AVERROR(EINVAL);
- }
- if ((tc->flags & AV_TIMECODE_FLAG_DROPFRAME) && tc->fps != 30 && tc->fps != 60) {
- av_log(log_ctx, AV_LOG_ERROR, "Drop frame is only allowed with 30000/1001 or 60000/1001 FPS\n");
- return AVERROR(EINVAL);
- }
- if (check_fps(tc->fps) < 0) {
- av_log(log_ctx, AV_LOG_ERROR, "Timecode frame rate %d/%d not supported\n",
- tc->rate.num, tc->rate.den);
- return AVERROR_PATCHWELCOME;
- }
- return 0;
-}
-
-static int fps_from_frame_rate(AVRational rate)
-{
- if (!rate.den || !rate.num)
- return -1;
- return (rate.num + rate.den/2) / rate.den;
-}
-
-int av_timecode_check_frame_rate(AVRational rate)
-{
- return check_fps(fps_from_frame_rate(rate));
-}
-
-int av_timecode_init(AVTimecode *tc, AVRational rate, int flags, int frame_start, void *log_ctx)
-{
- memset(tc, 0, sizeof(*tc));
- tc->start = frame_start;
- tc->flags = flags;
- tc->rate = rate;
- tc->fps = fps_from_frame_rate(rate);
- return check_timecode(log_ctx, tc);
-}
-
-int av_timecode_init_from_string(AVTimecode *tc, AVRational rate, const char *str, void *log_ctx)
-{
- char c;
- int hh, mm, ss, ff, ret;
-
- if (sscanf(str, "%d:%d:%d%c%d", &hh, &mm, &ss, &c, &ff) != 5) {
- av_log(log_ctx, AV_LOG_ERROR, "Unable to parse timecode, "
- "syntax: hh:mm:ss[:;.]ff\n");
- return AVERROR_INVALIDDATA;
- }
-
- memset(tc, 0, sizeof(*tc));
- tc->flags = c != ':' ? AV_TIMECODE_FLAG_DROPFRAME : 0; // drop if ';', '.', ...
- tc->rate = rate;
- tc->fps = fps_from_frame_rate(rate);
-
- ret = check_timecode(log_ctx, tc);
- if (ret < 0)
- return ret;
-
- tc->start = (hh*3600 + mm*60 + ss) * tc->fps + ff;
- if (tc->flags & AV_TIMECODE_FLAG_DROPFRAME) { /* adjust frame number */
- int tmins = 60*hh + mm;
- tc->start -= 2 * (tmins - tmins/10);
- }
- return 0;
-}
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