fftools/ffmpeg_utils.h

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #ifndef FFTOOLS_FFMPEG_UTILS_H
  20 #define FFTOOLS_FFMPEG_UTILS_H
  21
  22 #include <stdint.h>
  23
  24 #include "libavutil/common.h"
  25 #include "libavutil/frame.h"
  26 #include "libavutil/rational.h"
  27
  28 #include "libavcodec/packet.h"
  29
  30 typedef struct Timestamp {
  31     int64_t    ts;
  32     AVRational tb;
  33 } Timestamp;
  34
  35 /**
  36  * Merge two return codes - return one of the error codes if at least one of
  37  * them was negative, 0 otherwise.
  38  */
  39 static inline int err_merge(int err0, int err1)
  40 {
  41     // prefer "real" errors over EOF
  42     if ((err0 >= 0 || err0 == AVERROR_EOF) && err1 < 0)
  43         return err1;
  44     return (err0 < 0) ? err0 : FFMIN(err1, 0);
  45 }
  46
  47 /**
  48  * Wrapper calling av_frame_side_data_clone() in a loop for all source entries.
  49  * It does not clear dst beforehand. */
  50 static inline int clone_side_data(AVFrameSideData ***dst, int *nb_dst,
  51                                   AVFrameSideData * const *src, int nb_src,
  52                                   unsigned int flags)
  53 {
  54     for (int i = 0; i < nb_src; i++) {
  55         int ret = av_frame_side_data_clone(dst, nb_dst, src[i], flags);
  56         if (ret < 0)
  57             return ret;
  58     }
  59
  60     return 0;
  61 }
  62
  63 #endif // FFTOOLS_FFMPEG_UTILS_H