/* * AVOptions * Copyright (c) 2005 Michael Niedermayer * * 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 * AVOptions * @author Michael Niedermayer */ #include "avutil.h" #include "avassert.h" #include "avstring.h" #include "channel_layout.h" #include "common.h" #include "dict.h" #include "eval.h" #include "log.h" #include "parseutils.h" #include "pixdesc.h" #include "mathematics.h" #include "opt.h" #include "samplefmt.h" #include "bprint.h" #include "version.h" #include const AVOption *av_opt_next(const void *obj, const AVOption *last) { const AVClass *class; if (!obj) return NULL; class = *(const AVClass**)obj; if (!last && class && class->option && class->option[0].name) return class->option; if (last && last[1].name) return ++last; return NULL; } static int read_number(const AVOption *o, const void *dst, double *num, int *den, int64_t *intnum) { switch (o->type) { case AV_OPT_TYPE_FLAGS: *intnum = *(unsigned int*)dst; return 0; case AV_OPT_TYPE_PIXEL_FMT: *intnum = *(enum AVPixelFormat *)dst; return 0; case AV_OPT_TYPE_SAMPLE_FMT: *intnum = *(enum AVSampleFormat *)dst; return 0; case AV_OPT_TYPE_BOOL: case AV_OPT_TYPE_INT: *intnum = *(int *)dst; return 0; #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS case AV_OPT_TYPE_CHANNEL_LAYOUT: FF_ENABLE_DEPRECATION_WARNINGS #endif case AV_OPT_TYPE_DURATION: case AV_OPT_TYPE_INT64: case AV_OPT_TYPE_UINT64: *intnum = *(int64_t *)dst; return 0; case AV_OPT_TYPE_FLOAT: *num = *(float *)dst; return 0; case AV_OPT_TYPE_DOUBLE: *num = *(double *)dst; return 0; case AV_OPT_TYPE_RATIONAL: *intnum = ((AVRational *)dst)->num; *den = ((AVRational *)dst)->den; return 0; case AV_OPT_TYPE_CONST: *intnum = o->default_val.i64; return 0; } return AVERROR(EINVAL); } static int write_number(void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum) { if (o->type != AV_OPT_TYPE_FLAGS && (!den || o->max * den < num * intnum || o->min * den > num * intnum)) { num = den ? num * intnum / den : (num && intnum ? INFINITY : NAN); av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range [%g - %g]\n", num, o->name, o->min, o->max); return AVERROR(ERANGE); } if (o->type == AV_OPT_TYPE_FLAGS) { double d = num*intnum/den; if (d < -1.5 || d > 0xFFFFFFFF+0.5 || (llrint(d*256) & 255)) { av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' is not a valid set of 32bit integer flags\n", num*intnum/den, o->name); return AVERROR(ERANGE); } } switch (o->type) { case AV_OPT_TYPE_PIXEL_FMT: *(enum AVPixelFormat *)dst = llrint(num / den) * intnum; break; case AV_OPT_TYPE_SAMPLE_FMT: *(enum AVSampleFormat *)dst = llrint(num / den) * intnum; break; case AV_OPT_TYPE_BOOL: case AV_OPT_TYPE_FLAGS: case AV_OPT_TYPE_INT: *(int *)dst = llrint(num / den) * intnum; break; case AV_OPT_TYPE_DURATION: #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS case AV_OPT_TYPE_CHANNEL_LAYOUT: FF_ENABLE_DEPRECATION_WARNINGS #endif case AV_OPT_TYPE_INT64:{ double d = num / den; if (intnum == 1 && d == (double)INT64_MAX) { *(int64_t *)dst = INT64_MAX; } else *(int64_t *)dst = llrint(d) * intnum; break;} case AV_OPT_TYPE_UINT64:{ double d = num / den; // We must special case uint64_t here as llrint() does not support values // outside the int64_t range and there is no portable function which does // "INT64_MAX + 1ULL" is used as it is representable exactly as IEEE double // while INT64_MAX is not if (intnum == 1 && d == (double)UINT64_MAX) { *(uint64_t *)dst = UINT64_MAX; } else if (d > INT64_MAX + 1ULL) { *(uint64_t *)dst = (llrint(d - (INT64_MAX + 1ULL)) + (INT64_MAX + 1ULL))*intnum; } else { *(uint64_t *)dst = llrint(d) * intnum; } break;} case AV_OPT_TYPE_FLOAT: *(float *)dst = num * intnum / den; break; case AV_OPT_TYPE_DOUBLE: *(double *)dst = num * intnum / den; break; case AV_OPT_TYPE_RATIONAL: case AV_OPT_TYPE_VIDEO_RATE: if ((int) num == num) *(AVRational *)dst = (AVRational) { num *intnum, den }; else *(AVRational *)dst = av_d2q(num * intnum / den, 1 << 24); break; default: return AVERROR(EINVAL); } return 0; } static int hexchar2int(char c) { if (c >= '0' && c <= '9') return c - '0'; if (c >= 'a' && c <= 'f') return c - 'a' + 10; if (c >= 'A' && c <= 'F') return c - 'A' + 10; return -1; } static int set_string_binary(void *obj, const AVOption *o, const char *val, uint8_t **dst) { int *lendst = (int *)(dst + 1); uint8_t *bin, *ptr; int len; av_freep(dst); *lendst = 0; if (!val || !(len = strlen(val))) return 0; if (len & 1) return AVERROR(EINVAL); len /= 2; ptr = bin = av_malloc(len); if (!ptr) return AVERROR(ENOMEM); while (*val) { int a = hexchar2int(*val++); int b = hexchar2int(*val++); if (a < 0 || b < 0) { av_free(bin); return AVERROR(EINVAL); } *ptr++ = (a << 4) | b; } *dst = bin; *lendst = len; return 0; } static int set_string(void *obj, const AVOption *o, const char *val, uint8_t **dst) { av_freep(dst); *dst = av_strdup(val); return *dst ? 0 : AVERROR(ENOMEM); } #define DEFAULT_NUMVAL(opt) ((opt->type == AV_OPT_TYPE_INT64 || \ opt->type == AV_OPT_TYPE_UINT64 || \ opt->type == AV_OPT_TYPE_CONST || \ opt->type == AV_OPT_TYPE_FLAGS || \ opt->type == AV_OPT_TYPE_INT) \ ? opt->default_val.i64 \ : opt->default_val.dbl) static int set_string_number(void *obj, void *target_obj, const AVOption *o, const char *val, void *dst) { int ret = 0; if (o->type == AV_OPT_TYPE_RATIONAL || o->type == AV_OPT_TYPE_VIDEO_RATE) { int num, den; char c; if (sscanf(val, "%d%*1[:/]%d%c", &num, &den, &c) == 2) { if ((ret = write_number(obj, o, dst, 1, den, num)) >= 0) return ret; ret = 0; } } for (;;) { int i = 0; char buf[256]; int cmd = 0; double d; int64_t intnum = 1; if (o->type == AV_OPT_TYPE_FLAGS) { if (*val == '+' || *val == '-') cmd = *(val++); for (; i < sizeof(buf) - 1 && val[i] && val[i] != '+' && val[i] != '-'; i++) buf[i] = val[i]; buf[i] = 0; } { int res; int ci = 0; double const_values[64]; const char * const_names[64]; int search_flags = (o->flags & AV_OPT_FLAG_CHILD_CONSTS) ? AV_OPT_SEARCH_CHILDREN : 0; const AVOption *o_named = av_opt_find(target_obj, i ? buf : val, o->unit, 0, search_flags); if (o_named && o_named->type == AV_OPT_TYPE_CONST) { d = DEFAULT_NUMVAL(o_named); if (o_named->flags & AV_OPT_FLAG_DEPRECATED) av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", o_named->name, o_named->help); } else { if (o->unit) { for (o_named = NULL; o_named = av_opt_next(target_obj, o_named); ) { if (o_named->type == AV_OPT_TYPE_CONST && o_named->unit && !strcmp(o_named->unit, o->unit)) { if (ci + 6 >= FF_ARRAY_ELEMS(const_values)) { av_log(obj, AV_LOG_ERROR, "const_values array too small for %s\n", o->unit); return AVERROR_PATCHWELCOME; } const_names [ci ] = o_named->name; const_values[ci++] = DEFAULT_NUMVAL(o_named); } } } const_names [ci ] = "default"; const_values[ci++] = DEFAULT_NUMVAL(o); const_names [ci ] = "max"; const_values[ci++] = o->max; const_names [ci ] = "min"; const_values[ci++] = o->min; const_names [ci ] = "none"; const_values[ci++] = 0; const_names [ci ] = "all"; const_values[ci++] = ~0; const_names [ci] = NULL; const_values[ci] = 0; res = av_expr_parse_and_eval(&d, i ? buf : val, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, obj); if (res < 0) { av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val); return res; } } } if (o->type == AV_OPT_TYPE_FLAGS) { read_number(o, dst, NULL, NULL, &intnum); if (cmd == '+') d = intnum | (int64_t)d; else if (cmd == '-') d = intnum &~(int64_t)d; } if ((ret = write_number(obj, o, dst, d, 1, 1)) < 0) return ret; val += i; if (!i || !*val) return 0; } } static int set_string_image_size(void *obj, const AVOption *o, const char *val, int *dst) { int ret; if (!val || !strcmp(val, "none")) { dst[0] = dst[1] = 0; return 0; } ret = av_parse_video_size(dst, dst + 1, val); if (ret < 0) av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as image size\n", val); return ret; } static int set_string_video_rate(void *obj, const AVOption *o, const char *val, AVRational *dst) { int ret = av_parse_video_rate(dst, val); if (ret < 0) av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as video rate\n", val); return ret; } static int set_string_color(void *obj, const AVOption *o, const char *val, uint8_t *dst) { int ret; if (!val) { return 0; } else { ret = av_parse_color(dst, val, -1, obj); if (ret < 0) av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as color\n", val); return ret; } return 0; } static const char *get_bool_name(int val) { if (val < 0) return "auto"; return val ? "true" : "false"; } static int set_string_bool(void *obj, const AVOption *o, const char *val, int *dst) { int n; if (!val) return 0; if (!strcmp(val, "auto")) { n = -1; } else if (av_match_name(val, "true,y,yes,enable,enabled,on")) { n = 1; } else if (av_match_name(val, "false,n,no,disable,disabled,off")) { n = 0; } else { char *end = NULL; n = strtol(val, &end, 10); if (val + strlen(val) != end) goto fail; } if (n < o->min || n > o->max) goto fail; *dst = n; return 0; fail: av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as boolean\n", val); return AVERROR(EINVAL); } static int set_string_fmt(void *obj, const AVOption *o, const char *val, uint8_t *dst, int fmt_nb, int ((*get_fmt)(const char *)), const char *desc) { int fmt, min, max; if (!val || !strcmp(val, "none")) { fmt = -1; } else { fmt = get_fmt(val); if (fmt == -1) { char *tail; fmt = strtol(val, &tail, 0); if (*tail || (unsigned)fmt >= fmt_nb) { av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as %s\n", val, desc); return AVERROR(EINVAL); } } } min = FFMAX(o->min, -1); max = FFMIN(o->max, fmt_nb-1); // hack for compatibility with old ffmpeg if(min == 0 && max == 0) { min = -1; max = fmt_nb-1; } if (fmt < min || fmt > max) { av_log(obj, AV_LOG_ERROR, "Value %d for parameter '%s' out of %s format range [%d - %d]\n", fmt, o->name, desc, min, max); return AVERROR(ERANGE); } *(int *)dst = fmt; return 0; } static int get_pix_fmt(const char *name) { return av_get_pix_fmt(name); } static int set_string_pixel_fmt(void *obj, const AVOption *o, const char *val, uint8_t *dst) { return set_string_fmt(obj, o, val, dst, AV_PIX_FMT_NB, get_pix_fmt, "pixel format"); } static int get_sample_fmt(const char *name) { return av_get_sample_fmt(name); } static int set_string_sample_fmt(void *obj, const AVOption *o, const char *val, uint8_t *dst) { return set_string_fmt(obj, o, val, dst, AV_SAMPLE_FMT_NB, get_sample_fmt, "sample format"); } static int set_string_dict(void *obj, const AVOption *o, const char *val, uint8_t **dst) { AVDictionary *options = NULL; if (val) { int ret = av_dict_parse_string(&options, val, "=", ":", 0); if (ret < 0) { av_dict_free(&options); return ret; } } av_dict_free((AVDictionary **)dst); *dst = (uint8_t *)options; return 0; } static int set_string_channel_layout(void *obj, const AVOption *o, const char *val, void *dst) { AVChannelLayout *channel_layout = dst; av_channel_layout_uninit(channel_layout); if (!val) return 0; return av_channel_layout_from_string(channel_layout, val); } int av_opt_set(void *obj, const char *name, const char *val, int search_flags) { int ret = 0; void *dst, *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; FF_DISABLE_DEPRECATION_WARNINGS if (!val && (o->type != AV_OPT_TYPE_STRING && o->type != AV_OPT_TYPE_PIXEL_FMT && o->type != AV_OPT_TYPE_SAMPLE_FMT && o->type != AV_OPT_TYPE_IMAGE_SIZE && o->type != AV_OPT_TYPE_DURATION && o->type != AV_OPT_TYPE_COLOR && #if FF_API_OLD_CHANNEL_LAYOUT o->type != AV_OPT_TYPE_CHANNEL_LAYOUT && #endif o->type != AV_OPT_TYPE_BOOL)) return AVERROR(EINVAL); FF_ENABLE_DEPRECATION_WARNINGS if (o->flags & AV_OPT_FLAG_READONLY) return AVERROR(EINVAL); if (o->flags & AV_OPT_FLAG_DEPRECATED) av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help); dst = ((uint8_t *)target_obj) + o->offset; switch (o->type) { case AV_OPT_TYPE_BOOL: return set_string_bool(obj, o, val, dst); case AV_OPT_TYPE_STRING: return set_string(obj, o, val, dst); case AV_OPT_TYPE_BINARY: return set_string_binary(obj, o, val, dst); case AV_OPT_TYPE_FLAGS: case AV_OPT_TYPE_INT: case AV_OPT_TYPE_INT64: case AV_OPT_TYPE_UINT64: case AV_OPT_TYPE_FLOAT: case AV_OPT_TYPE_DOUBLE: case AV_OPT_TYPE_RATIONAL: return set_string_number(obj, target_obj, o, val, dst); case AV_OPT_TYPE_IMAGE_SIZE: return set_string_image_size(obj, o, val, dst); case AV_OPT_TYPE_VIDEO_RATE: { AVRational tmp; ret = set_string_video_rate(obj, o, val, &tmp); if (ret < 0) return ret; return write_number(obj, o, dst, 1, tmp.den, tmp.num); } case AV_OPT_TYPE_PIXEL_FMT: return set_string_pixel_fmt(obj, o, val, dst); case AV_OPT_TYPE_SAMPLE_FMT: return set_string_sample_fmt(obj, o, val, dst); case AV_OPT_TYPE_DURATION: { int64_t usecs = 0; if (val) { if ((ret = av_parse_time(&usecs, val, 1)) < 0) { av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as duration\n", val); return ret; } } if (usecs < o->min || usecs > o->max) { av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range [%g - %g]\n", usecs / 1000000.0, o->name, o->min / 1000000.0, o->max / 1000000.0); return AVERROR(ERANGE); } *(int64_t *)dst = usecs; return 0; } case AV_OPT_TYPE_COLOR: return set_string_color(obj, o, val, dst); #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS case AV_OPT_TYPE_CHANNEL_LAYOUT: if (!val || !strcmp(val, "none")) { *(int64_t *)dst = 0; } else { int64_t cl = av_get_channel_layout(val); if (!cl) { av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as channel layout\n", val); ret = AVERROR(EINVAL); } *(int64_t *)dst = cl; return ret; } break; FF_ENABLE_DEPRECATION_WARNINGS #endif case AV_OPT_TYPE_CHLAYOUT: ret = set_string_channel_layout(obj, o, val, dst); if (ret < 0) { av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as channel layout\n", val); ret = AVERROR(EINVAL); } return ret; case AV_OPT_TYPE_DICT: return set_string_dict(obj, o, val, dst); } av_log(obj, AV_LOG_ERROR, "Invalid option type.\n"); return AVERROR(EINVAL); } #define OPT_EVAL_NUMBER(name, opttype, vartype) \ int av_opt_eval_ ## name(void *obj, const AVOption *o, \ const char *val, vartype *name ## _out) \ { \ if (!o || o->type != opttype || o->flags & AV_OPT_FLAG_READONLY) \ return AVERROR(EINVAL); \ return set_string_number(obj, obj, o, val, name ## _out); \ } OPT_EVAL_NUMBER(flags, AV_OPT_TYPE_FLAGS, int) OPT_EVAL_NUMBER(int, AV_OPT_TYPE_INT, int) OPT_EVAL_NUMBER(int64, AV_OPT_TYPE_INT64, int64_t) OPT_EVAL_NUMBER(float, AV_OPT_TYPE_FLOAT, float) OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE, double) OPT_EVAL_NUMBER(q, AV_OPT_TYPE_RATIONAL, AVRational) static int set_number(void *obj, const char *name, double num, int den, int64_t intnum, int search_flags) { void *dst, *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->flags & AV_OPT_FLAG_READONLY) return AVERROR(EINVAL); dst = ((uint8_t *)target_obj) + o->offset; return write_number(obj, o, dst, num, den, intnum); } int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags) { return set_number(obj, name, 1, 1, val, search_flags); } int av_opt_set_double(void *obj, const char *name, double val, int search_flags) { return set_number(obj, name, val, 1, 1, search_flags); } int av_opt_set_q(void *obj, const char *name, AVRational val, int search_flags) { return set_number(obj, name, val.num, val.den, 1, search_flags); } int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int search_flags) { void *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); uint8_t *ptr; uint8_t **dst; int *lendst; if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->type != AV_OPT_TYPE_BINARY || o->flags & AV_OPT_FLAG_READONLY) return AVERROR(EINVAL); ptr = len ? av_malloc(len) : NULL; if (len && !ptr) return AVERROR(ENOMEM); dst = (uint8_t **)(((uint8_t *)target_obj) + o->offset); lendst = (int *)(dst + 1); av_free(*dst); *dst = ptr; *lendst = len; if (len) memcpy(ptr, val, len); return 0; } int av_opt_set_image_size(void *obj, const char *name, int w, int h, int search_flags) { void *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->type != AV_OPT_TYPE_IMAGE_SIZE) { av_log(obj, AV_LOG_ERROR, "The value set by option '%s' is not an image size.\n", o->name); return AVERROR(EINVAL); } if (w<0 || h<0) { av_log(obj, AV_LOG_ERROR, "Invalid negative size value %dx%d for size '%s'\n", w, h, o->name); return AVERROR(EINVAL); } *(int *)(((uint8_t *)target_obj) + o->offset) = w; *(int *)(((uint8_t *)target_obj+sizeof(int)) + o->offset) = h; return 0; } int av_opt_set_video_rate(void *obj, const char *name, AVRational val, int search_flags) { void *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->type != AV_OPT_TYPE_VIDEO_RATE) { av_log(obj, AV_LOG_ERROR, "The value set by option '%s' is not a video rate.\n", o->name); return AVERROR(EINVAL); } if (val.num <= 0 || val.den <= 0) return AVERROR(EINVAL); return set_number(obj, name, val.num, val.den, 1, search_flags); } static int set_format(void *obj, const char *name, int fmt, int search_flags, enum AVOptionType type, const char *desc, int nb_fmts) { void *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); int min, max; if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->type != type) { av_log(obj, AV_LOG_ERROR, "The value set by option '%s' is not a %s format", name, desc); return AVERROR(EINVAL); } min = FFMAX(o->min, -1); max = FFMIN(o->max, nb_fmts-1); if (fmt < min || fmt > max) { av_log(obj, AV_LOG_ERROR, "Value %d for parameter '%s' out of %s format range [%d - %d]\n", fmt, name, desc, min, max); return AVERROR(ERANGE); } *(int *)(((uint8_t *)target_obj) + o->offset) = fmt; return 0; } int av_opt_set_pixel_fmt(void *obj, const char *name, enum AVPixelFormat fmt, int search_flags) { return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_PIXEL_FMT, "pixel", AV_PIX_FMT_NB); } int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search_flags) { return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_SAMPLE_FMT, "sample", AV_SAMPLE_FMT_NB); } #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS int av_opt_set_channel_layout(void *obj, const char *name, int64_t cl, int search_flags) { void *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->type != AV_OPT_TYPE_CHANNEL_LAYOUT) { av_log(obj, AV_LOG_ERROR, "The value set by option '%s' is not a channel layout.\n", o->name); return AVERROR(EINVAL); } *(int64_t *)(((uint8_t *)target_obj) + o->offset) = cl; return 0; } FF_ENABLE_DEPRECATION_WARNINGS #endif int av_opt_set_dict_val(void *obj, const char *name, const AVDictionary *val, int search_flags) { void *target_obj; AVDictionary **dst; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->flags & AV_OPT_FLAG_READONLY) return AVERROR(EINVAL); dst = (AVDictionary **)(((uint8_t *)target_obj) + o->offset); av_dict_free(dst); av_dict_copy(dst, val, 0); return 0; } int av_opt_set_chlayout(void *obj, const char *name, const AVChannelLayout *channel_layout, int search_flags) { void *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); AVChannelLayout *dst; if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; dst = (AVChannelLayout*)((uint8_t*)target_obj + o->offset); return av_channel_layout_copy(dst, channel_layout); } static void format_duration(char *buf, size_t size, int64_t d) { char *e; av_assert0(size >= 25); if (d < 0 && d != INT64_MIN) { *(buf++) = '-'; size--; d = -d; } if (d == INT64_MAX) snprintf(buf, size, "INT64_MAX"); else if (d == INT64_MIN) snprintf(buf, size, "INT64_MIN"); else if (d > (int64_t)3600*1000000) snprintf(buf, size, "%"PRId64":%02d:%02d.%06d", d / 3600000000, (int)((d / 60000000) % 60), (int)((d / 1000000) % 60), (int)(d % 1000000)); else if (d > 60*1000000) snprintf(buf, size, "%d:%02d.%06d", (int)(d / 60000000), (int)((d / 1000000) % 60), (int)(d % 1000000)); else snprintf(buf, size, "%d.%06d", (int)(d / 1000000), (int)(d % 1000000)); e = buf + strlen(buf); while (e > buf && e[-1] == '0') *(--e) = 0; if (e > buf && e[-1] == '.') *(--e) = 0; } int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val) { void *dst, *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); uint8_t *bin, buf[128]; int len, i, ret; int64_t i64; if (!o || !target_obj || (o->offset<=0 && o->type != AV_OPT_TYPE_CONST)) return AVERROR_OPTION_NOT_FOUND; if (o->flags & AV_OPT_FLAG_DEPRECATED) av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help); dst = (uint8_t *)target_obj + o->offset; buf[0] = 0; switch (o->type) { case AV_OPT_TYPE_BOOL: ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(get_bool_name(*(int *)dst), "invalid")); break; case AV_OPT_TYPE_FLAGS: ret = snprintf(buf, sizeof(buf), "0x%08X", *(int *)dst); break; case AV_OPT_TYPE_INT: ret = snprintf(buf, sizeof(buf), "%d", *(int *)dst); break; case AV_OPT_TYPE_INT64: ret = snprintf(buf, sizeof(buf), "%"PRId64, *(int64_t *)dst); break; case AV_OPT_TYPE_UINT64: ret = snprintf(buf, sizeof(buf), "%"PRIu64, *(uint64_t *)dst); break; case AV_OPT_TYPE_FLOAT: ret = snprintf(buf, sizeof(buf), "%f", *(float *)dst); break; case AV_OPT_TYPE_DOUBLE: ret = snprintf(buf, sizeof(buf), "%f", *(double *)dst); break; case AV_OPT_TYPE_VIDEO_RATE: case AV_OPT_TYPE_RATIONAL: ret = snprintf(buf, sizeof(buf), "%d/%d", ((AVRational *)dst)->num, ((AVRational *)dst)->den); break; case AV_OPT_TYPE_CONST: ret = snprintf(buf, sizeof(buf), "%"PRId64, o->default_val.i64); break; case AV_OPT_TYPE_STRING: if (*(uint8_t **)dst) { *out_val = av_strdup(*(uint8_t **)dst); } else if (search_flags & AV_OPT_ALLOW_NULL) { *out_val = NULL; return 0; } else { *out_val = av_strdup(""); } return *out_val ? 0 : AVERROR(ENOMEM); case AV_OPT_TYPE_BINARY: if (!*(uint8_t **)dst && (search_flags & AV_OPT_ALLOW_NULL)) { *out_val = NULL; return 0; } len = *(int *)(((uint8_t *)dst) + sizeof(uint8_t *)); if ((uint64_t)len * 2 + 1 > INT_MAX) return AVERROR(EINVAL); if (!(*out_val = av_malloc(len * 2 + 1))) return AVERROR(ENOMEM); if (!len) { *out_val[0] = '\0'; return 0; } bin = *(uint8_t **)dst; for (i = 0; i < len; i++) snprintf(*out_val + i * 2, 3, "%02X", bin[i]); return 0; case AV_OPT_TYPE_IMAGE_SIZE: ret = snprintf(buf, sizeof(buf), "%dx%d", ((int *)dst)[0], ((int *)dst)[1]); break; case AV_OPT_TYPE_PIXEL_FMT: ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_pix_fmt_name(*(enum AVPixelFormat *)dst), "none")); break; case AV_OPT_TYPE_SAMPLE_FMT: ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_sample_fmt_name(*(enum AVSampleFormat *)dst), "none")); break; case AV_OPT_TYPE_DURATION: i64 = *(int64_t *)dst; format_duration(buf, sizeof(buf), i64); ret = strlen(buf); // no overflow possible, checked by an assert break; case AV_OPT_TYPE_COLOR: ret = snprintf(buf, sizeof(buf), "0x%02x%02x%02x%02x", (int)((uint8_t *)dst)[0], (int)((uint8_t *)dst)[1], (int)((uint8_t *)dst)[2], (int)((uint8_t *)dst)[3]); break; #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS case AV_OPT_TYPE_CHANNEL_LAYOUT: i64 = *(int64_t *)dst; ret = snprintf(buf, sizeof(buf), "0x%"PRIx64, i64); break; FF_ENABLE_DEPRECATION_WARNINGS #endif case AV_OPT_TYPE_CHLAYOUT: ret = av_channel_layout_describe(dst, buf, sizeof(buf)); break; case AV_OPT_TYPE_DICT: if (!*(AVDictionary **)dst && (search_flags & AV_OPT_ALLOW_NULL)) { *out_val = NULL; return 0; } return av_dict_get_string(*(AVDictionary **)dst, (char **)out_val, '=', ':'); default: return AVERROR(EINVAL); } if (ret >= sizeof(buf)) return AVERROR(EINVAL); *out_val = av_strdup(buf); return *out_val ? 0 : AVERROR(ENOMEM); } static int get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum, int search_flags) { void *dst, *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) goto error; dst = ((uint8_t *)target_obj) + o->offset; if (o_out) *o_out= o; return read_number(o, dst, num, den, intnum); error: *den = *intnum = 0; return -1; } int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val) { int64_t intnum = 1; double num = 1; int ret, den = 1; if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0) return ret; if (num == den) *out_val = intnum; else *out_val = num * intnum / den; return 0; } int av_opt_get_double(void *obj, const char *name, int search_flags, double *out_val) { int64_t intnum = 1; double num = 1; int ret, den = 1; if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0) return ret; *out_val = num * intnum / den; return 0; } int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_val) { int64_t intnum = 1; double num = 1; int ret, den = 1; if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0) return ret; if (num == 1.0 && (int)intnum == intnum) *out_val = (AVRational){intnum, den}; else *out_val = av_d2q(num*intnum/den, 1<<24); return 0; } int av_opt_get_image_size(void *obj, const char *name, int search_flags, int *w_out, int *h_out) { void *dst, *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->type != AV_OPT_TYPE_IMAGE_SIZE) { av_log(obj, AV_LOG_ERROR, "The value for option '%s' is not an image size.\n", name); return AVERROR(EINVAL); } dst = ((uint8_t*)target_obj) + o->offset; if (w_out) *w_out = *(int *)dst; if (h_out) *h_out = *((int *)dst+1); return 0; } int av_opt_get_video_rate(void *obj, const char *name, int search_flags, AVRational *out_val) { int64_t intnum = 1; double num = 1; int ret, den = 1; if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0) return ret; if (num == 1.0 && (int)intnum == intnum) *out_val = (AVRational) { intnum, den }; else *out_val = av_d2q(num * intnum / den, 1 << 24); return 0; } static int get_format(void *obj, const char *name, int search_flags, int *out_fmt, enum AVOptionType type, const char *desc) { void *dst, *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->type != type) { av_log(obj, AV_LOG_ERROR, "The value for option '%s' is not a %s format.\n", desc, name); return AVERROR(EINVAL); } dst = ((uint8_t*)target_obj) + o->offset; *out_fmt = *(int *)dst; return 0; } int av_opt_get_pixel_fmt(void *obj, const char *name, int search_flags, enum AVPixelFormat *out_fmt) { return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_PIXEL_FMT, "pixel"); } int av_opt_get_sample_fmt(void *obj, const char *name, int search_flags, enum AVSampleFormat *out_fmt) { return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_SAMPLE_FMT, "sample"); } #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS int av_opt_get_channel_layout(void *obj, const char *name, int search_flags, int64_t *cl) { void *dst, *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->type != AV_OPT_TYPE_CHANNEL_LAYOUT) { av_log(obj, AV_LOG_ERROR, "The value for option '%s' is not a channel layout.\n", name); return AVERROR(EINVAL); } dst = ((uint8_t*)target_obj) + o->offset; *cl = *(int64_t *)dst; return 0; } FF_ENABLE_DEPRECATION_WARNINGS #endif int av_opt_get_chlayout(void *obj, const char *name, int search_flags, AVChannelLayout *cl) { void *dst, *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->type != AV_OPT_TYPE_CHLAYOUT) { av_log(obj, AV_LOG_ERROR, "The value for option '%s' is not a channel layout.\n", name); return AVERROR(EINVAL); } dst = ((uint8_t*)target_obj) + o->offset; return av_channel_layout_copy(cl, dst); } int av_opt_get_dict_val(void *obj, const char *name, int search_flags, AVDictionary **out_val) { void *target_obj; AVDictionary *src; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (o->type != AV_OPT_TYPE_DICT) return AVERROR(EINVAL); src = *(AVDictionary **)(((uint8_t *)target_obj) + o->offset); av_dict_copy(out_val, src, 0); return 0; } int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name) { const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0); const AVOption *flag = av_opt_find(obj, flag_name, field ? field->unit : NULL, 0, 0); int64_t res; if (!field || !flag || flag->type != AV_OPT_TYPE_CONST || av_opt_get_int(obj, field_name, 0, &res) < 0) return 0; return res & flag->default_val.i64; } static void log_int_value(void *av_log_obj, int level, int64_t i) { if (i == INT_MAX) { av_log(av_log_obj, level, "INT_MAX"); } else if (i == INT_MIN) { av_log(av_log_obj, level, "INT_MIN"); } else if (i == UINT32_MAX) { av_log(av_log_obj, level, "UINT32_MAX"); } else if (i == INT64_MAX) { av_log(av_log_obj, level, "I64_MAX"); } else if (i == INT64_MIN) { av_log(av_log_obj, level, "I64_MIN"); } else { av_log(av_log_obj, level, "%"PRId64, i); } } static void log_value(void *av_log_obj, int level, double d) { if (d == INT_MAX) { av_log(av_log_obj, level, "INT_MAX"); } else if (d == INT_MIN) { av_log(av_log_obj, level, "INT_MIN"); } else if (d == UINT32_MAX) { av_log(av_log_obj, level, "UINT32_MAX"); } else if (d == (double)INT64_MAX) { av_log(av_log_obj, level, "I64_MAX"); } else if (d == INT64_MIN) { av_log(av_log_obj, level, "I64_MIN"); } else if (d == FLT_MAX) { av_log(av_log_obj, level, "FLT_MAX"); } else if (d == FLT_MIN) { av_log(av_log_obj, level, "FLT_MIN"); } else if (d == -FLT_MAX) { av_log(av_log_obj, level, "-FLT_MAX"); } else if (d == -FLT_MIN) { av_log(av_log_obj, level, "-FLT_MIN"); } else if (d == DBL_MAX) { av_log(av_log_obj, level, "DBL_MAX"); } else if (d == DBL_MIN) { av_log(av_log_obj, level, "DBL_MIN"); } else if (d == -DBL_MAX) { av_log(av_log_obj, level, "-DBL_MAX"); } else if (d == -DBL_MIN) { av_log(av_log_obj, level, "-DBL_MIN"); } else { av_log(av_log_obj, level, "%g", d); } } static const char *get_opt_const_name(void *obj, const char *unit, int64_t value) { const AVOption *opt = NULL; if (!unit) return NULL; while ((opt = av_opt_next(obj, opt))) if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) && opt->default_val.i64 == value) return opt->name; return NULL; } static char *get_opt_flags_string(void *obj, const char *unit, int64_t value) { const AVOption *opt = NULL; char flags[512]; flags[0] = 0; if (!unit) return NULL; while ((opt = av_opt_next(obj, opt))) { if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) && opt->default_val.i64 & value) { if (flags[0]) av_strlcatf(flags, sizeof(flags), "+"); av_strlcatf(flags, sizeof(flags), "%s", opt->name); } } if (flags[0]) return av_strdup(flags); return NULL; } static void opt_list(void *obj, void *av_log_obj, const char *unit, int req_flags, int rej_flags, enum AVOptionType parent_type) { const AVOption *opt = NULL; AVOptionRanges *r; int i; while ((opt = av_opt_next(obj, opt))) { if (!(opt->flags & req_flags) || (opt->flags & rej_flags)) continue; /* Don't print CONST's on level one. * Don't print anything but CONST's on level two. * Only print items from the requested unit. */ if (!unit && opt->type == AV_OPT_TYPE_CONST) continue; else if (unit && opt->type != AV_OPT_TYPE_CONST) continue; else if (unit && opt->type == AV_OPT_TYPE_CONST && strcmp(unit, opt->unit)) continue; else if (unit && opt->type == AV_OPT_TYPE_CONST) av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name); else av_log(av_log_obj, AV_LOG_INFO, " %s%-17s ", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? " " : "-", opt->name); switch (opt->type) { case AV_OPT_TYPE_FLAGS: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_INT: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_INT64: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_UINT64: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_DOUBLE: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_FLOAT: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_STRING: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_RATIONAL: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_BINARY: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_DICT: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_IMAGE_SIZE: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_VIDEO_RATE: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_PIXEL_FMT: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_SAMPLE_FMT: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_DURATION: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_COLOR: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_CHLAYOUT: #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS case AV_OPT_TYPE_CHANNEL_LAYOUT: FF_ENABLE_DEPRECATION_WARNINGS #endif av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_BOOL: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; case AV_OPT_TYPE_CONST: if (parent_type == AV_OPT_TYPE_INT) av_log(av_log_obj, AV_LOG_INFO, "%-12"PRId64" ", opt->default_val.i64); else av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; default: av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); break; } av_log(av_log_obj, AV_LOG_INFO, "%c%c%c%c%c%c%c%c%c%c%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.', (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.', (opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? 'F' : '.', (opt->flags & AV_OPT_FLAG_VIDEO_PARAM) ? 'V' : '.', (opt->flags & AV_OPT_FLAG_AUDIO_PARAM) ? 'A' : '.', (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.', (opt->flags & AV_OPT_FLAG_EXPORT) ? 'X' : '.', (opt->flags & AV_OPT_FLAG_READONLY) ? 'R' : '.', (opt->flags & AV_OPT_FLAG_BSF_PARAM) ? 'B' : '.', (opt->flags & AV_OPT_FLAG_RUNTIME_PARAM) ? 'T' : '.', (opt->flags & AV_OPT_FLAG_DEPRECATED) ? 'P' : '.'); if (opt->help) av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help); if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) { switch (opt->type) { case AV_OPT_TYPE_INT: case AV_OPT_TYPE_INT64: case AV_OPT_TYPE_UINT64: case AV_OPT_TYPE_DOUBLE: case AV_OPT_TYPE_FLOAT: case AV_OPT_TYPE_RATIONAL: for (i = 0; i < r->nb_ranges; i++) { av_log(av_log_obj, AV_LOG_INFO, " (from "); log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min); av_log(av_log_obj, AV_LOG_INFO, " to "); log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max); av_log(av_log_obj, AV_LOG_INFO, ")"); } break; } av_opt_freep_ranges(&r); } if (opt->type != AV_OPT_TYPE_CONST && opt->type != AV_OPT_TYPE_BINARY && !((opt->type == AV_OPT_TYPE_COLOR || opt->type == AV_OPT_TYPE_IMAGE_SIZE || opt->type == AV_OPT_TYPE_STRING || opt->type == AV_OPT_TYPE_DICT || opt->type == AV_OPT_TYPE_CHLAYOUT || opt->type == AV_OPT_TYPE_VIDEO_RATE) && !opt->default_val.str)) { av_log(av_log_obj, AV_LOG_INFO, " (default "); switch (opt->type) { case AV_OPT_TYPE_BOOL: av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(get_bool_name(opt->default_val.i64), "invalid")); break; case AV_OPT_TYPE_FLAGS: { char *def_flags = get_opt_flags_string(obj, opt->unit, opt->default_val.i64); if (def_flags) { av_log(av_log_obj, AV_LOG_INFO, "%s", def_flags); av_freep(&def_flags); } else { av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64); } break; } case AV_OPT_TYPE_DURATION: { char buf[25]; format_duration(buf, sizeof(buf), opt->default_val.i64); av_log(av_log_obj, AV_LOG_INFO, "%s", buf); break; } case AV_OPT_TYPE_INT: case AV_OPT_TYPE_UINT64: case AV_OPT_TYPE_INT64: { const char *def_const = get_opt_const_name(obj, opt->unit, opt->default_val.i64); if (def_const) av_log(av_log_obj, AV_LOG_INFO, "%s", def_const); else log_int_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64); break; } case AV_OPT_TYPE_DOUBLE: case AV_OPT_TYPE_FLOAT: log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl); break; case AV_OPT_TYPE_RATIONAL: { AVRational q = av_d2q(opt->default_val.dbl, INT_MAX); av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); } break; case AV_OPT_TYPE_PIXEL_FMT: av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none")); break; case AV_OPT_TYPE_SAMPLE_FMT: av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none")); break; case AV_OPT_TYPE_COLOR: case AV_OPT_TYPE_IMAGE_SIZE: case AV_OPT_TYPE_STRING: case AV_OPT_TYPE_DICT: case AV_OPT_TYPE_VIDEO_RATE: case AV_OPT_TYPE_CHLAYOUT: av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str); break; #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS case AV_OPT_TYPE_CHANNEL_LAYOUT: av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64); break; FF_ENABLE_DEPRECATION_WARNINGS #endif } av_log(av_log_obj, AV_LOG_INFO, ")"); } av_log(av_log_obj, AV_LOG_INFO, "\n"); if (opt->unit && opt->type != AV_OPT_TYPE_CONST) opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags, opt->type); } } int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags) { if (!obj) return -1; av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass **)obj)->class_name); opt_list(obj, av_log_obj, NULL, req_flags, rej_flags, -1); return 0; } void av_opt_set_defaults(void *s) { av_opt_set_defaults2(s, 0, 0); } void av_opt_set_defaults2(void *s, int mask, int flags) { const AVOption *opt = NULL; while ((opt = av_opt_next(s, opt))) { void *dst = ((uint8_t*)s) + opt->offset; if ((opt->flags & mask) != flags) continue; if (opt->flags & AV_OPT_FLAG_READONLY) continue; switch (opt->type) { case AV_OPT_TYPE_CONST: /* Nothing to be done here */ break; case AV_OPT_TYPE_BOOL: case AV_OPT_TYPE_FLAGS: case AV_OPT_TYPE_INT: case AV_OPT_TYPE_INT64: case AV_OPT_TYPE_UINT64: case AV_OPT_TYPE_DURATION: #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS case AV_OPT_TYPE_CHANNEL_LAYOUT: FF_ENABLE_DEPRECATION_WARNINGS #endif case AV_OPT_TYPE_PIXEL_FMT: case AV_OPT_TYPE_SAMPLE_FMT: write_number(s, opt, dst, 1, 1, opt->default_val.i64); break; case AV_OPT_TYPE_DOUBLE: case AV_OPT_TYPE_FLOAT: { double val; val = opt->default_val.dbl; write_number(s, opt, dst, val, 1, 1); } break; case AV_OPT_TYPE_RATIONAL: { AVRational val; val = av_d2q(opt->default_val.dbl, INT_MAX); write_number(s, opt, dst, 1, val.den, val.num); } break; case AV_OPT_TYPE_COLOR: set_string_color(s, opt, opt->default_val.str, dst); break; case AV_OPT_TYPE_STRING: set_string(s, opt, opt->default_val.str, dst); break; case AV_OPT_TYPE_IMAGE_SIZE: set_string_image_size(s, opt, opt->default_val.str, dst); break; case AV_OPT_TYPE_VIDEO_RATE: set_string_video_rate(s, opt, opt->default_val.str, dst); break; case AV_OPT_TYPE_BINARY: set_string_binary(s, opt, opt->default_val.str, dst); break; case AV_OPT_TYPE_CHLAYOUT: set_string_channel_layout(s, opt, opt->default_val.str, dst); break; case AV_OPT_TYPE_DICT: set_string_dict(s, opt, opt->default_val.str, dst); break; default: av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n", opt->type, opt->name); } } } /** * Store the value in the field in ctx that is named like key. * ctx must be an AVClass context, storing is done using AVOptions. * * @param buf the string to parse, buf will be updated to point at the * separator just after the parsed key/value pair * @param key_val_sep a 0-terminated list of characters used to * separate key from value * @param pairs_sep a 0-terminated list of characters used to separate * two pairs from each other * @return 0 if the key/value pair has been successfully parsed and * set, or a negative value corresponding to an AVERROR code in case * of error: * AVERROR(EINVAL) if the key/value pair cannot be parsed, * the error code issued by av_opt_set() if the key/value pair * cannot be set */ static int parse_key_value_pair(void *ctx, const char **buf, const char *key_val_sep, const char *pairs_sep) { char *key = av_get_token(buf, key_val_sep); char *val; int ret; if (!key) return AVERROR(ENOMEM); if (*key && strspn(*buf, key_val_sep)) { (*buf)++; val = av_get_token(buf, pairs_sep); if (!val) { av_freep(&key); return AVERROR(ENOMEM); } } else { av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key); av_free(key); return AVERROR(EINVAL); } av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val); ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN); if (ret == AVERROR_OPTION_NOT_FOUND) av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key); av_free(key); av_free(val); return ret; } int av_set_options_string(void *ctx, const char *opts, const char *key_val_sep, const char *pairs_sep) { int ret, count = 0; if (!opts) return 0; while (*opts) { if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0) return ret; count++; if (*opts) opts++; } return count; } #define WHITESPACES " \n\t\r" static int is_key_char(char c) { return (unsigned)((c | 32) - 'a') < 26 || (unsigned)(c - '0') < 10 || c == '-' || c == '_' || c == '/' || c == '.'; } /** * Read a key from a string. * * The key consists of is_key_char characters and must be terminated by a * character from the delim string; spaces are ignored. * * @return 0 for success (even with ellipsis), <0 for failure */ static int get_key(const char **ropts, const char *delim, char **rkey) { const char *opts = *ropts; const char *key_start, *key_end; key_start = opts += strspn(opts, WHITESPACES); while (is_key_char(*opts)) opts++; key_end = opts; opts += strspn(opts, WHITESPACES); if (!*opts || !strchr(delim, *opts)) return AVERROR(EINVAL); opts++; if (!(*rkey = av_malloc(key_end - key_start + 1))) return AVERROR(ENOMEM); memcpy(*rkey, key_start, key_end - key_start); (*rkey)[key_end - key_start] = 0; *ropts = opts; return 0; } int av_opt_get_key_value(const char **ropts, const char *key_val_sep, const char *pairs_sep, unsigned flags, char **rkey, char **rval) { int ret; char *key = NULL, *val; const char *opts = *ropts; if ((ret = get_key(&opts, key_val_sep, &key)) < 0 && !(flags & AV_OPT_FLAG_IMPLICIT_KEY)) return AVERROR(EINVAL); if (!(val = av_get_token(&opts, pairs_sep))) { av_free(key); return AVERROR(ENOMEM); } *ropts = opts; *rkey = key; *rval = val; return 0; } int av_opt_set_from_string(void *ctx, const char *opts, const char *const *shorthand, const char *key_val_sep, const char *pairs_sep) { int ret, count = 0; const char *dummy_shorthand = NULL; char *av_uninit(parsed_key), *av_uninit(value); const char *key; if (!opts) return 0; if (!shorthand) shorthand = &dummy_shorthand; while (*opts) { ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep, *shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0, &parsed_key, &value); if (ret < 0) { if (ret == AVERROR(EINVAL)) av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts); else av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts, av_err2str(ret)); return ret; } if (*opts) opts++; if (parsed_key) { key = parsed_key; while (*shorthand) /* discard all remaining shorthand */ shorthand++; } else { key = *(shorthand++); } av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value); if ((ret = av_opt_set(ctx, key, value, 0)) < 0) { if (ret == AVERROR_OPTION_NOT_FOUND) av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key); av_free(value); av_free(parsed_key); return ret; } av_free(value); av_free(parsed_key); count++; } return count; } void av_opt_free(void *obj) { const AVOption *o = NULL; while ((o = av_opt_next(obj, o))) { switch (o->type) { case AV_OPT_TYPE_STRING: case AV_OPT_TYPE_BINARY: av_freep((uint8_t *)obj + o->offset); break; case AV_OPT_TYPE_DICT: av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset)); break; case AV_OPT_TYPE_CHLAYOUT: av_channel_layout_uninit((AVChannelLayout *)(((uint8_t *)obj) + o->offset)); break; default: break; } } } int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags) { const AVDictionaryEntry *t = NULL; AVDictionary *tmp = NULL; int ret; if (!options) return 0; while ((t = av_dict_iterate(*options, t))) { ret = av_opt_set(obj, t->key, t->value, search_flags); if (ret == AVERROR_OPTION_NOT_FOUND) ret = av_dict_set(&tmp, t->key, t->value, AV_DICT_MULTIKEY); if (ret < 0) { av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value); av_dict_free(&tmp); return ret; } } av_dict_free(options); *options = tmp; return 0; } int av_opt_set_dict(void *obj, AVDictionary **options) { return av_opt_set_dict2(obj, options, 0); } const AVOption *av_opt_find(void *obj, const char *name, const char *unit, int opt_flags, int search_flags) { return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL); } const AVOption *av_opt_find2(void *obj, const char *name, const char *unit, int opt_flags, int search_flags, void **target_obj) { const AVClass *c; const AVOption *o = NULL; if(!obj) return NULL; c= *(AVClass**)obj; if (!c) return NULL; if (search_flags & AV_OPT_SEARCH_CHILDREN) { if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) { void *iter = NULL; const AVClass *child; while (child = av_opt_child_class_iterate(c, &iter)) if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL)) return o; } else { void *child = NULL; while (child = av_opt_child_next(obj, child)) if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj)) return o; } } while (o = av_opt_next(obj, o)) { if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags && ((!unit && o->type != AV_OPT_TYPE_CONST) || (unit && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) { if (target_obj) { if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ)) *target_obj = obj; else *target_obj = NULL; } return o; } } return NULL; } void *av_opt_child_next(void *obj, void *prev) { const AVClass *c = *(AVClass **)obj; if (c->child_next) return c->child_next(obj, prev); return NULL; } const AVClass *av_opt_child_class_iterate(const AVClass *parent, void **iter) { if (parent->child_class_iterate) return parent->child_class_iterate(iter); return NULL; } void *av_opt_ptr(const AVClass *class, void *obj, const char *name) { const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL); if(!opt) return NULL; return (uint8_t*)obj + opt->offset; } static int opt_size(enum AVOptionType type) { switch(type) { case AV_OPT_TYPE_BOOL: case AV_OPT_TYPE_INT: case AV_OPT_TYPE_FLAGS: return sizeof(int); case AV_OPT_TYPE_DURATION: #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS case AV_OPT_TYPE_CHANNEL_LAYOUT: FF_ENABLE_DEPRECATION_WARNINGS #endif case AV_OPT_TYPE_INT64: case AV_OPT_TYPE_UINT64: return sizeof(int64_t); case AV_OPT_TYPE_DOUBLE: return sizeof(double); case AV_OPT_TYPE_FLOAT: return sizeof(float); case AV_OPT_TYPE_STRING: return sizeof(uint8_t*); case AV_OPT_TYPE_VIDEO_RATE: case AV_OPT_TYPE_RATIONAL: return sizeof(AVRational); case AV_OPT_TYPE_BINARY: return sizeof(uint8_t*) + sizeof(int); case AV_OPT_TYPE_IMAGE_SIZE: return sizeof(int[2]); case AV_OPT_TYPE_PIXEL_FMT: return sizeof(enum AVPixelFormat); case AV_OPT_TYPE_SAMPLE_FMT: return sizeof(enum AVSampleFormat); case AV_OPT_TYPE_COLOR: return 4; } return AVERROR(EINVAL); } int av_opt_copy(void *dst, const void *src) { const AVOption *o = NULL; const AVClass *c; int ret = 0; if (!src) return AVERROR(EINVAL); c = *(AVClass **)src; if (!c || c != *(AVClass **)dst) return AVERROR(EINVAL); while ((o = av_opt_next(src, o))) { void *field_dst = (uint8_t *)dst + o->offset; void *field_src = (uint8_t *)src + o->offset; uint8_t **field_dst8 = (uint8_t **)field_dst; uint8_t **field_src8 = (uint8_t **)field_src; if (o->type == AV_OPT_TYPE_STRING) { if (*field_dst8 != *field_src8) av_freep(field_dst8); *field_dst8 = av_strdup(*field_src8); if (*field_src8 && !*field_dst8) ret = AVERROR(ENOMEM); } else if (o->type == AV_OPT_TYPE_BINARY) { int len = *(int *)(field_src8 + 1); if (*field_dst8 != *field_src8) av_freep(field_dst8); *field_dst8 = av_memdup(*field_src8, len); if (len && !*field_dst8) { ret = AVERROR(ENOMEM); len = 0; } *(int *)(field_dst8 + 1) = len; } else if (o->type == AV_OPT_TYPE_CONST) { // do nothing } else if (o->type == AV_OPT_TYPE_DICT) { AVDictionary **sdict = (AVDictionary **) field_src; AVDictionary **ddict = (AVDictionary **) field_dst; int ret2; if (*sdict != *ddict) av_dict_free(ddict); *ddict = NULL; ret2 = av_dict_copy(ddict, *sdict, 0); if (ret2 < 0) ret = ret2; } else if (o->type == AV_OPT_TYPE_CHLAYOUT) { if (field_dst != field_src) ret = av_channel_layout_copy(field_dst, field_src); } else { int size = opt_size(o->type); if (size < 0) ret = size; else memcpy(field_dst, field_src, size); } } return ret; } int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags) { int ret; const AVClass *c = *(AVClass**)obj; int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = c->query_ranges; if (!callback) callback = av_opt_query_ranges_default; ret = callback(ranges_arg, obj, key, flags); if (ret >= 0) { if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE)) ret = 1; (*ranges_arg)->nb_components = ret; } return ret; } int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags) { AVOptionRanges *ranges = av_mallocz(sizeof(*ranges)); AVOptionRange **range_array = av_mallocz(sizeof(void*)); AVOptionRange *range = av_mallocz(sizeof(*range)); const AVOption *field = av_opt_find(obj, key, NULL, 0, flags); int ret; *ranges_arg = NULL; if (!ranges || !range || !range_array || !field) { ret = AVERROR(ENOMEM); goto fail; } ranges->range = range_array; ranges->range[0] = range; ranges->nb_ranges = 1; ranges->nb_components = 1; range->is_range = 1; range->value_min = field->min; range->value_max = field->max; switch (field->type) { case AV_OPT_TYPE_BOOL: case AV_OPT_TYPE_INT: case AV_OPT_TYPE_INT64: case AV_OPT_TYPE_UINT64: case AV_OPT_TYPE_PIXEL_FMT: case AV_OPT_TYPE_SAMPLE_FMT: case AV_OPT_TYPE_FLOAT: case AV_OPT_TYPE_DOUBLE: case AV_OPT_TYPE_DURATION: case AV_OPT_TYPE_COLOR: #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS case AV_OPT_TYPE_CHANNEL_LAYOUT: FF_ENABLE_DEPRECATION_WARNINGS #endif break; case AV_OPT_TYPE_STRING: range->component_min = 0; range->component_max = 0x10FFFF; // max unicode value range->value_min = -1; range->value_max = INT_MAX; break; case AV_OPT_TYPE_RATIONAL: range->component_min = INT_MIN; range->component_max = INT_MAX; break; case AV_OPT_TYPE_IMAGE_SIZE: range->component_min = 0; range->component_max = INT_MAX/128/8; range->value_min = 0; range->value_max = INT_MAX/8; break; case AV_OPT_TYPE_VIDEO_RATE: range->component_min = 1; range->component_max = INT_MAX; range->value_min = 1; range->value_max = INT_MAX; break; default: ret = AVERROR(ENOSYS); goto fail; } *ranges_arg = ranges; return 1; fail: av_free(ranges); av_free(range); av_free(range_array); return ret; } void av_opt_freep_ranges(AVOptionRanges **rangesp) { int i; AVOptionRanges *ranges = *rangesp; if (!ranges) return; for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) { AVOptionRange *range = ranges->range[i]; if (range) { av_freep(&range->str); av_freep(&ranges->range[i]); } } av_freep(&ranges->range); av_freep(rangesp); } int av_opt_is_set_to_default(void *obj, const AVOption *o) { int64_t i64; double d, d2; float f; AVRational q; int ret, w, h; char *str; void *dst; if (!o || !obj) return AVERROR(EINVAL); dst = ((uint8_t*)obj) + o->offset; switch (o->type) { case AV_OPT_TYPE_CONST: return 1; case AV_OPT_TYPE_BOOL: case AV_OPT_TYPE_FLAGS: case AV_OPT_TYPE_PIXEL_FMT: case AV_OPT_TYPE_SAMPLE_FMT: case AV_OPT_TYPE_INT: #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS case AV_OPT_TYPE_CHANNEL_LAYOUT: FF_ENABLE_DEPRECATION_WARNINGS #endif case AV_OPT_TYPE_DURATION: case AV_OPT_TYPE_INT64: case AV_OPT_TYPE_UINT64: read_number(o, dst, NULL, NULL, &i64); return o->default_val.i64 == i64; case AV_OPT_TYPE_CHLAYOUT: { AVChannelLayout ch_layout = { 0 }; if (o->default_val.str) { if ((ret = av_channel_layout_from_string(&ch_layout, o->default_val.str)) < 0) return ret; } return !av_channel_layout_compare((AVChannelLayout *)dst, &ch_layout); } case AV_OPT_TYPE_STRING: str = *(char **)dst; if (str == o->default_val.str) //2 NULLs return 1; if (!str || !o->default_val.str) //1 NULL return 0; return !strcmp(str, o->default_val.str); case AV_OPT_TYPE_DOUBLE: read_number(o, dst, &d, NULL, NULL); return o->default_val.dbl == d; case AV_OPT_TYPE_FLOAT: read_number(o, dst, &d, NULL, NULL); f = o->default_val.dbl; d2 = f; return d2 == d; case AV_OPT_TYPE_RATIONAL: q = av_d2q(o->default_val.dbl, INT_MAX); return !av_cmp_q(*(AVRational*)dst, q); case AV_OPT_TYPE_BINARY: { struct { uint8_t *data; int size; } tmp = {0}; int opt_size = *(int *)((void **)dst + 1); void *opt_ptr = *(void **)dst; if (!opt_size && (!o->default_val.str || !strlen(o->default_val.str))) return 1; if (!opt_size || !o->default_val.str || !strlen(o->default_val.str )) return 0; if (opt_size != strlen(o->default_val.str) / 2) return 0; ret = set_string_binary(NULL, NULL, o->default_val.str, &tmp.data); if (!ret) ret = !memcmp(opt_ptr, tmp.data, tmp.size); av_free(tmp.data); return ret; } case AV_OPT_TYPE_DICT: { AVDictionary *dict1 = NULL; AVDictionary *dict2 = *(AVDictionary **)dst; const AVDictionaryEntry *en1 = NULL; const AVDictionaryEntry *en2 = NULL; ret = av_dict_parse_string(&dict1, o->default_val.str, "=", ":", 0); if (ret < 0) { av_dict_free(&dict1); return ret; } do { en1 = av_dict_iterate(dict1, en1); en2 = av_dict_iterate(dict2, en2); } while (en1 && en2 && !strcmp(en1->key, en2->key) && !strcmp(en1->value, en2->value)); av_dict_free(&dict1); return (!en1 && !en2); } case AV_OPT_TYPE_IMAGE_SIZE: if (!o->default_val.str || !strcmp(o->default_val.str, "none")) w = h = 0; else if ((ret = av_parse_video_size(&w, &h, o->default_val.str)) < 0) return ret; return (w == *(int *)dst) && (h == *((int *)dst+1)); case AV_OPT_TYPE_VIDEO_RATE: q = (AVRational){0, 0}; if (o->default_val.str) { if ((ret = av_parse_video_rate(&q, o->default_val.str)) < 0) return ret; } return !av_cmp_q(*(AVRational*)dst, q); case AV_OPT_TYPE_COLOR: { uint8_t color[4] = {0, 0, 0, 0}; if (o->default_val.str) { if ((ret = av_parse_color(color, o->default_val.str, -1, NULL)) < 0) return ret; } return !memcmp(color, dst, sizeof(color)); } default: av_log(obj, AV_LOG_WARNING, "Not supported option type: %d, option name: %s\n", o->type, o->name); break; } return AVERROR_PATCHWELCOME; } int av_opt_is_set_to_default_by_name(void *obj, const char *name, int search_flags) { const AVOption *o; void *target; if (!obj) return AVERROR(EINVAL); o = av_opt_find2(obj, name, NULL, 0, search_flags, &target); if (!o) return AVERROR_OPTION_NOT_FOUND; return av_opt_is_set_to_default(target, o); } int av_opt_serialize(void *obj, int opt_flags, int flags, char **buffer, const char key_val_sep, const char pairs_sep) { const AVOption *o = NULL; uint8_t *buf; AVBPrint bprint; int ret, cnt = 0; const char special_chars[] = {pairs_sep, key_val_sep, '\0'}; if (pairs_sep == '\0' || key_val_sep == '\0' || pairs_sep == key_val_sep || pairs_sep == '\\' || key_val_sep == '\\') { av_log(obj, AV_LOG_ERROR, "Invalid separator(s) found."); return AVERROR(EINVAL); } if (!obj || !buffer) return AVERROR(EINVAL); *buffer = NULL; av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED); while (o = av_opt_next(obj, o)) { if (o->type == AV_OPT_TYPE_CONST) continue; if ((flags & AV_OPT_SERIALIZE_OPT_FLAGS_EXACT) && o->flags != opt_flags) continue; else if (((o->flags & opt_flags) != opt_flags)) continue; if (flags & AV_OPT_SERIALIZE_SKIP_DEFAULTS && av_opt_is_set_to_default(obj, o) > 0) continue; if ((ret = av_opt_get(obj, o->name, 0, &buf)) < 0) { av_bprint_finalize(&bprint, NULL); return ret; } if (buf) { if (cnt++) av_bprint_append_data(&bprint, &pairs_sep, 1); av_bprint_escape(&bprint, o->name, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0); av_bprint_append_data(&bprint, &key_val_sep, 1); av_bprint_escape(&bprint, buf, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0); av_freep(&buf); } } ret = av_bprint_finalize(&bprint, buffer); if (ret < 0) return ret; return 0; }