/* * 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 */ #ifndef FFTOOLS_FFMPEG_UTILS_H#define FFTOOLS_FFMPEG_UTILS_H #include <stdint.h> #include "libavutil/common.h"#include "libavutil/frame.h"#include "libavutil/rational.h" #include "libavcodec/packet.h" typedef struct Timestamp {    int64_t    ts;    AVRational tb;} Timestamp; /** * Merge two return codes - return one of the error codes if at least one of * them was negative, 0 otherwise. */static inline int err_merge(int err0, int err1){    // prefer "real" errors over EOF    if ((err0 >= 0 || err0 == AVERROR_EOF) && err1 < 0)        return err1;    return (err0 < 0) ? err0 : FFMIN(err1, 0);} /** * Wrapper calling av_frame_side_data_clone() in a loop for all source entries. * It does not clear dst beforehand. */static inline int clone_side_data(AVFrameSideData ***dst, int *nb_dst,                                  AVFrameSideData * const *src, int nb_src,                                  unsigned int flags){    for (int i = 0; i < nb_src; i++) {        int ret = av_frame_side_data_clone(dst, nb_dst, src[i], flags);        if (ret < 0)            return ret;    }     return 0;} #endif // FFTOOLS_FFMPEG_UTILS_H