Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 265 insertions, 0 deletions

diff --git a/media/ffvpx/libavutil/timecode.c b/media/ffvpx/libavutil/timecode.c
new file mode 100644
index 0000000000..b93f05b4b8
--- /dev/null
+++ b/media/ffvpx/libavutil/timecode.c
@@ -0,0 +1,265 @@
+/*
+ * 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 "common.h"
+#include "timecode.h"
+#include "log.h"
+#include "error.h"
+
+int av_timecode_adjust_ntsc_framenum2(int framenum, int fps)
+{
+    /* only works for multiples of NTSC 29.97 */
+    int drop_frames = 0;
+    int d, m, frames_per_10mins;
+
+    if (fps && fps % 30 == 0) {
+        drop_frames = fps / 30 * 2;
+        frames_per_10mins = fps / 30 * 17982;
+    } else
+        return framenum;
+
+    d = framenum / frames_per_10mins;
+    m = framenum % frames_per_10mins;
+
+    return framenum + 9U * 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 av_timecode_get_smpte(tc->rate, drop, hh, mm, ss, ff);
+}
+
+uint32_t av_timecode_get_smpte(AVRational rate, int drop, int hh, int mm, int ss, int ff)
+{
+    uint32_t tc = 0;
+
+    /* For SMPTE 12-M timecodes, frame count is a special case if > 30 FPS.
+       See SMPTE ST 12-1:2014 Sec 12.1 for more info. */
+    if (av_cmp_q(rate, (AVRational) {30, 1}) == 1) {
+        if (ff % 2 == 1) {
+            if (av_cmp_q(rate, (AVRational) {50, 1}) == 0)
+                tc |= (1 << 7);
+            else
+                tc |= (1 << 23);
+        }
+        ff /= 2;
+    }
+
+    hh = hh % 24;
+    mm = av_clip(mm, 0, 59);
+    ss = av_clip(ss, 0, 59);
+    ff = ff % 40;
+
+    tc |= drop << 30;
+    tc |= (ff / 10) << 28;
+    tc |= (ff % 10) << 24;
+    tc |= (ss / 10) << 20;
+    tc |= (ss % 10) << 16;
+    tc |= (mm / 10) << 12;
+    tc |= (mm % 10) << 8;
+    tc |= (hh / 10) << 4;
+    tc |= (hh % 10);
+
+    return tc;
+}
+
+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, ff_len, 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*60LL) % 60;
+    hh = framenum / (fps*3600LL);
+    if (tc->flags & AV_TIMECODE_FLAG_24HOURSMAX)
+        hh = hh % 24;
+    ff_len = fps > 10000 ? 5 : fps > 1000 ? 4 : fps > 100 ? 3 : fps > 10 ? 2 : 1;
+    snprintf(buf, AV_TIMECODE_STR_SIZE, "%s%02d:%02d:%02d%c%0*d",
+             neg ? "-" : "",
+             hh, mm, ss, drop ? ';' : ':', ff_len, 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_string2(char *buf, AVRational rate, uint32_t tcsmpte, int prevent_df, int skip_field)
+{
+    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
+
+    if (av_cmp_q(rate, (AVRational) {30, 1}) == 1) {
+        ff <<= 1;
+        if (!skip_field) {
+            if (av_cmp_q(rate, (AVRational) {50, 1}) == 0)
+                ff += !!(tcsmpte & 1 << 7);
+            else
+                ff += !!(tcsmpte & 1 << 23);
+        }
+    }
+
+    snprintf(buf, AV_TIMECODE_STR_SIZE, "%02u:%02u:%02u%c%02u",
+             hh, mm, ss, drop ? ';' : ':', ff);
+    return buf;
+
+}
+
+char *av_timecode_make_smpte_tc_string(char *buf, uint32_t tcsmpte, int prevent_df)
+{
+    return av_timecode_make_smpte_tc_string2(buf, (AVRational){30, 1}, tcsmpte, prevent_df, 1);
+}
+
+char *av_timecode_make_mpeg_tc_string(char *buf, uint32_t tc25bit)
+{
+    snprintf(buf, AV_TIMECODE_STR_SIZE,
+             "%02"PRIu32":%02"PRIu32":%02"PRIu32"%c%02"PRIu32,
+             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, 48, 50, 60, 100, 120, 150,
+    };
+
+    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 ((int)tc->fps <= 0) {
+        av_log(log_ctx, AV_LOG_ERROR, "Valid timecode frame rate must be specified. Minimum value is 1\n");
+        return AVERROR(EINVAL);
+    }
+    if ((tc->flags & AV_TIMECODE_FLAG_DROPFRAME) && tc->fps % 30 != 0) {
+        av_log(log_ctx, AV_LOG_ERROR, "Drop frame is only allowed with multiples of 30000/1001 FPS\n");
+        return AVERROR(EINVAL);
+    }
+    if (check_fps(tc->fps) < 0) {
+        av_log(log_ctx, AV_LOG_WARNING, "Using non-standard frame rate %d/%d\n",
+               tc->rate.num, tc->rate.den);
+    }
+    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_components(AVTimecode *tc, AVRational rate, int flags, int hh, int mm, int ss, int ff, void *log_ctx)
+{
+    int ret;
+
+    memset(tc, 0, sizeof(*tc));
+    tc->flags = flags;
+    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 -= (tc->fps / 30 * 2) * (tmins - tmins/10);
+    }
+    return 0;
+}
+
+int av_timecode_init_from_string(AVTimecode *tc, AVRational rate, const char *str, void *log_ctx)
+{
+    char c;
+    int hh, mm, ss, ff, flags;
+
+    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;
+    }
+    flags = c != ':' ? AV_TIMECODE_FLAG_DROPFRAME : 0; // drop if ';', '.', ...
+
+    return av_timecode_init_from_components(tc, rate, flags, hh, mm, ss, ff, log_ctx);
+}