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Quelle opt.cSprache: C |
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/* * AVOptions * Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at> * * 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 <michaelni@gmx.at> */ #include "avutil.h" #include "avassert.h" #include "avstring.h" #include "channel_layout.h" #include "dict.h" #include "eval.h" #include "log.h" #include "mem.h" #include "parseutils.h" #include "pixdesc.h" #include "mathematics.h" #include "opt.h" #include "samplefmt.h" #include "bprint.h" #include "version.h" #include <float.h> #define TYPE_BASE(type) ((type) & ~AV_OPT_TYPE_FLAG_ARRAY) 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 const struct { size_t size; const char *name; } opt_type_desc[] = { [AV_OPT_TYPE_FLAGS] = { sizeof(unsigned), "<flags>" }, [AV_OPT_TYPE_INT] = { sizeof(int), "<int>" }, [AV_OPT_TYPE_INT64] = { sizeof(int64_t), "<int64>" }, [AV_OPT_TYPE_UINT] = { sizeof(unsigned), "<unsigned>" }, [AV_OPT_TYPE_UINT64] = { sizeof(uint64_t), "<uint64>" }, [AV_OPT_TYPE_DOUBLE] = { sizeof(double), "<double>" }, [AV_OPT_TYPE_FLOAT] = { sizeof(float), "<float>" }, [AV_OPT_TYPE_STRING] = { sizeof(char *), "<string>" }, [AV_OPT_TYPE_RATIONAL] = { sizeof(AVRational), "<rational>" }, [AV_OPT_TYPE_BINARY] = { sizeof(uint8_t *), "<binary>" }, [AV_OPT_TYPE_DICT] = { sizeof(AVDictionary *), "<dictionary>" }, [AV_OPT_TYPE_IMAGE_SIZE] = { sizeof(int[2]), "<image_size>" }, [AV_OPT_TYPE_VIDEO_RATE] = { sizeof(AVRational), "<video_rate>" }, [AV_OPT_TYPE_PIXEL_FMT] = { sizeof(int), "<pix_fmt>" }, [AV_OPT_TYPE_SAMPLE_FMT] = { sizeof(int), "<sample_fmt>" }, [AV_OPT_TYPE_DURATION] = { sizeof(int64_t), "<duration>" }, [AV_OPT_TYPE_COLOR] = { sizeof(uint8_t[4]), "<color>" }, [AV_OPT_TYPE_CHLAYOUT] = { sizeof(AVChannelLayout),"<channel_layout>" }, [AV_OPT_TYPE_BOOL] = { sizeof(int), "<boolean>" }, }; // option is plain old data static int opt_is_pod(enum AVOptionType type) { switch (type) { case AV_OPT_TYPE_FLAGS: case AV_OPT_TYPE_INT: case AV_OPT_TYPE_INT64: case AV_OPT_TYPE_DOUBLE: case AV_OPT_TYPE_FLOAT: case AV_OPT_TYPE_RATIONAL: case AV_OPT_TYPE_UINT64: case AV_OPT_TYPE_IMAGE_SIZE: case AV_OPT_TYPE_PIXEL_FMT: case AV_OPT_TYPE_SAMPLE_FMT: case AV_OPT_TYPE_VIDEO_RATE: case AV_OPT_TYPE_DURATION: case AV_OPT_TYPE_COLOR: case AV_OPT_TYPE_BOOL: case AV_OPT_TYPE_UINT: return 1; } return 0; } static uint8_t opt_array_sep(const AVOption *o) { const AVOptionArrayDef *d = o->default_val.arr; av_assert1(o->type & AV_OPT_TYPE_FLAG_ARRAY); return (d && d->sep) ? d->sep : ','; } static void *opt_array_pelem(const AVOption *o, void *array, unsigned idx) { av_assert1(o->type & AV_OPT_TYPE_FLAG_ARRAY); return (uint8_t *)array + idx * opt_type_desc[TYPE_BASE(o->type)].size; } static unsigned *opt_array_pcount(const void *parray) { return (unsigned *)((const void * const *)parray + 1); } static void opt_free_elem(enum AVOptionType type, void *ptr) { switch (TYPE_BASE(type)) { case AV_OPT_TYPE_STRING: case AV_OPT_TYPE_BINARY: av_freep(ptr); break; case AV_OPT_TYPE_DICT: av_dict_free((AVDictionary **)ptr); break; case AV_OPT_TYPE_CHLAYOUT: av_channel_layout_uninit((AVChannelLayout *)ptr); break; default: break; } } static void opt_free_array(const AVOption *o, void *parray, unsigned *count) { for (unsigned i = 0; i < *count; i++) opt_free_elem(o->type, opt_array_pelem(o, *(void **)parray, i)); av_freep(parray); *count = 0; } /** * Perform common setup for option-setting functions. * * @param require_type when non-0, require the option to be of this type * @param ptgt target object is written here * @param po the option is written here * @param pdst pointer to option value is written here */ static int opt_set_init(void *obj, const char *name, int search_flags, int require_type, void **ptgt, const AVOption **po, void **pdst) { const AVOption *o; void *tgt; o = av_opt_find2(obj, name, NULL, 0, search_flags, &tgt); if (!o || !tgt) return AVERROR_OPTION_NOT_FOUND; if (o->flags & AV_OPT_FLAG_READONLY) return AVERROR(EINVAL); if (require_type && (o->type != require_type)) { av_log(obj, AV_LOG_ERROR, "Tried to set option '%s' of type %s from value of type %s, " "this is not supported\n", o->name, opt_type_desc[o->type].name, opt_type_desc[require_type].name); return AVERROR(EINVAL); } if (!(o->flags & AV_OPT_FLAG_RUNTIME_PARAM)) { unsigned *state_flags = NULL; const AVClass *class; // try state flags first from the target (child), then from its parent class = *(const AVClass**)tgt; if (class->state_flags_offset) state_flags = (unsigned*)((uint8_t*)tgt + class->state_flags_offset); if (!state_flags && obj != tgt) { class = *(const AVClass**)obj; if (class->state_flags_offset) state_flags = (unsigned*)((uint8_t*)obj + class->state_flags_offset); } if (state_flags && (*state_flags & AV_CLASS_STATE_INITIALIZED)) { av_log(obj, AV_LOG_ERROR, "Option '%s' is not a runtime option and " "so cannot be set after the object has been initialized\n", o->name); 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); if (po) *po = o; if (ptgt) *ptgt = tgt; if (pdst) *pdst = ((uint8_t *)tgt) + o->offset; return 0; } static AVRational double_to_rational(double d) { AVRational r = av_d2q(d, 1 << 24); if ((!r.num || !r.den) && d) r = av_d2q(d, INT_MAX); return r; } static int read_number(const AVOption *o, const void *dst, double *num, int *den, int64_t *in { switch (TYPE_BASE(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; case AV_OPT_TYPE_UINT: *intnum = *(unsigned int *)dst; return 0; 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 { const enum AVOptionType type = TYPE_BASE(o->type); if (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 (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 (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: case AV_OPT_TYPE_UINT: *(int *)dst = llrint(num / den) * intnum; break; case AV_OPT_TYPE_DURATION: 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 = double_to_rational(num * intnum / den); 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); if (!val) return 0; *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_UINT || \ 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 *va { const enum AVOptionType type = TYPE_BASE(o->type); int ret = 0; if (type == AV_OPT_TYPE_RATIONAL || 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 (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 \"%s\" option value \"%s\"\n", o->name, val); return res; } } } if (type == AV_OPT_TYPE_FLAGS) { intnum = *(unsigned int*)dst; 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 \"%s\" option value \"%s\" as image size\n", o->na return ret; } static int set_string_video_rate(void *obj, const AVOption *o, const char *val, AVRational { int ret = av_parse_video_rate(dst, val); if (ret < 0) av_log(obj, AV_LOG_ERROR, "Unable to parse \"%s\" option value \"%s\" as video rate\n", o->na 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 \"%s\" option value \"%s\" as color\n", o->name, v 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 \"%s\" option value \"%s\" as boolean\n", o->name 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 \"%s\" option value \"%s\" as %s\n", o->name, 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 *ds { 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); } static int opt_set_elem(void *obj, void *target_obj, const AVOption *o, const char *val, void *dst) { const enum AVOptionType type = TYPE_BASE(o->type); int ret; if (!val && (type != AV_OPT_TYPE_STRING && type != AV_OPT_TYPE_PIXEL_FMT && type != AV_OPT_TYPE_SAMPLE_FMT && type != AV_OPT_TYPE_IMAGE_SIZE && type != AV_OPT_TYPE_DURATION && type != AV_OPT_TYPE_COLOR && type != AV_OPT_TYPE_BOOL)) return AVERROR(EINVAL); switch (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_UINT: 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 \"%s\" option value \"%s\" as duration\n", o->nam 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); 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 \"%s\" option value \"%s\" as channel layout\n", 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); } static int opt_set_array(void *obj, void *target_obj, const AVOption *o, const char *val, void *dst) { const AVOptionArrayDef *arr = o->default_val.arr; const size_t elem_size = opt_type_desc[TYPE_BASE(o->type)].size; const uint8_t sep = opt_array_sep(o); uint8_t *str = NULL; void *elems = NULL; unsigned nb_elems = 0; int ret; if (val && *val) { str = av_malloc(strlen(val) + 1); if (!str) return AVERROR(ENOMEM); } // split and unescape the string while (val && *val) { uint8_t *p = str; void *tmp; if (arr && arr->size_max && nb_elems >= arr->size_max) { av_log(obj, AV_LOG_ERROR, "Cannot assign more than %u elements to array option %s\n", arr->size_max, o->name); ret = AVERROR(EINVAL); goto fail; } for (; *val; val++, p++) { if (*val == '\\' && val[1]) val++; else if (*val == sep) { val++; break; } *p = *val; } *p = 0; tmp = av_realloc_array(elems, nb_elems + 1, elem_size); if (!tmp) { ret = AVERROR(ENOMEM); goto fail; } elems = tmp; tmp = opt_array_pelem(o, elems, nb_elems); memset(tmp, 0, elem_size); ret = opt_set_elem(obj, target_obj, o, str, tmp); if (ret < 0) goto fail; nb_elems++; } av_freep(&str); opt_free_array(o, dst, opt_array_pcount(dst)); if (arr && nb_elems < arr->size_min) { av_log(obj, AV_LOG_ERROR, "Cannot assign fewer than %u elements to array option %s\n", arr->size_min, o->name); ret = AVERROR(EINVAL); goto fail; } *((void **)dst) = elems; *opt_array_pcount(dst) = nb_elems; return 0; fail: av_freep(&str); opt_free_array(o, &elems, &nb_elems); return ret; } int av_opt_set(void *obj, const char *name, const char *val, int search_flags) { void *dst, *target_obj; const AVOption *o; int ret; ret = opt_set_init(obj, name, search_flags, 0, &target_obj, &o, &dst); if (ret < 0) return ret; return ((o->type & AV_OPT_TYPE_FLAG_ARRAY) ? opt_set_array : opt_set_elem)(obj, target_obj, o, val, dst); } #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(uint, AV_OPT_TYPE_UINT, unsigned) 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, int require_type) { void *dst; const AVOption *o; int ret; ret = opt_set_init(obj, name, search_flags, require_type, NULL, &o, &dst); if (ret < 0) return ret; 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, 0); } 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, 0); } 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, 0); } int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int search_flag { uint8_t *ptr; uint8_t **dst; int *lendst; int ret; ret = opt_set_init(obj, name, search_flags, AV_OPT_TYPE_BINARY, NULL, NULL, (void**)&dst); if (ret < 0) return ret; ptr = len ? av_malloc(len) : NULL; if (len && !ptr) return AVERROR(ENOMEM); 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) { const AVOption *o; int *dst; int ret; ret = opt_set_init(obj, name, search_flags, AV_OPT_TYPE_IMAGE_SIZE, NULL, &o, (void**)&dst); if (ret < 0) return ret; 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); } dst[0] = w; dst[1] = h; return 0; } int av_opt_set_video_rate(void *obj, const char *name, AVRational val, int search_flags) { return set_number(obj, name, val.num, val.den, 1, search_flags, AV_OPT_TYPE_VIDEO_RATE) } static int set_format(void *obj, const char *name, int fmt, int search_flags, enum AVOptionType type, const char *desc, int nb_fmts) { const AVOption *o; int *dst; int min, max, ret; ret = opt_set_init(obj, name, search_flags, type, NULL, &o, (void**)&dst); if (ret < 0) return ret; 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); } *dst = fmt; return 0; } int av_opt_set_pixel_fmt(void *obj, const char *name, enum AVPixelFormat fmt, int search_f { return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_PIXEL_FMT, "pixel", AV_PIX_ } int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search { return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_SAMPLE_FMT, "sample", AV_SA } int av_opt_set_dict_val(void *obj, const char *name, const AVDictionary *val, int search_flags) { AVDictionary **dst; int ret; ret = opt_set_init(obj, name, search_flags, AV_OPT_TYPE_DICT, NULL, NULL, (void**)&dst); if (ret < 0) return ret; av_dict_free(dst); return av_dict_copy(dst, val, 0); } int av_opt_set_chlayout(void *obj, const char *name, const AVChannelLayout *channel_layout, int search_flags) { AVChannelLayout *dst; int ret; ret = opt_set_init(obj, name, search_flags, AV_OPT_TYPE_CHLAYOUT, NULL, NULL, (void**)&dst); if (ret < 0) return ret; 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; } static int opt_get_elem(const AVOption *o, uint8_t **pbuf, size_t buf_len, const void *dst, int search_flags) { int ret; switch (TYPE_BASE(o->type)) { case AV_OPT_TYPE_BOOL: ret = snprintf(*pbuf, buf_len, "%s", get_bool_name(*(int *)dst)); break; case AV_OPT_TYPE_FLAGS: ret = snprintf(*pbuf, buf_len, "0x%08X", *(int *)dst); break; case AV_OPT_TYPE_INT: ret = snprintf(*pbuf, buf_len, "%d", *(int *)dst); break; case AV_OPT_TYPE_UINT: ret = snprintf(*pbuf, buf_len, "%u", *(unsigned *)dst); break; case AV_OPT_TYPE_INT64: ret = snprintf(*pbuf, buf_len, "%"PRId64, *(int64_t *)dst); break; case AV_OPT_TYPE_UINT64: ret = snprintf(*pbuf, buf_len, "%"PRIu64, *(uint64_t *)dst); break; case AV_OPT_TYPE_FLOAT: ret = snprintf(*pbuf, buf_len, "%f", *(float *)dst); break; case AV_OPT_TYPE_DOUBLE: ret = snprintf(*pbuf, buf_len, "%f", *(double *)dst); break; case AV_OPT_TYPE_VIDEO_RATE: case AV_OPT_TYPE_RATIONAL: ret = snprintf(*pbuf, buf_len, "%d/%d", ((AVRational *)dst)->num, ((AVRational *)dst)->den break; case AV_OPT_TYPE_CONST: ret = snprintf(*pbuf, buf_len, "%"PRId64, o->default_val.i64); break; case AV_OPT_TYPE_STRING: if (*(uint8_t **)dst) { *pbuf = av_strdup(*(uint8_t **)dst); } else if (search_flags & AV_OPT_ALLOW_NULL) { *pbuf = NULL; return 0; } else { *pbuf = av_strdup(""); } return *pbuf ? 0 : AVERROR(ENOMEM); case AV_OPT_TYPE_BINARY: { const uint8_t *bin; int len; if (!*(uint8_t **)dst && (search_flags & AV_OPT_ALLOW_NULL)) { *pbuf = NULL; return 0; } len = *(int *)(((uint8_t *)dst) + sizeof(uint8_t *)); if ((uint64_t)len * 2 + 1 > INT_MAX) return AVERROR(EINVAL); if (!(*pbuf = av_malloc(len * 2 + 1))) return AVERROR(ENOMEM); if (!len) { *pbuf[0] = '\0'; return 0; } bin = *(uint8_t **)dst; for (int i = 0; i < len; i++) snprintf(*pbuf + i * 2, 3, "%02X", bin[i]); return 0; } case AV_OPT_TYPE_IMAGE_SIZE: ret = snprintf(*pbuf, buf_len, "%dx%d", ((int *)dst)[0], ((int *)dst)[1]); break; case AV_OPT_TYPE_PIXEL_FMT: ret = snprintf(*pbuf, buf_len, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(*(enum AV break; case AV_OPT_TYPE_SAMPLE_FMT: ret = snprintf(*pbuf, buf_len, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(*(enu break; case AV_OPT_TYPE_DURATION: { int64_t i64 = *(int64_t *)dst; format_duration(*pbuf, buf_len, i64); ret = strlen(*pbuf); // no overflow possible, checked by an assert break; } case AV_OPT_TYPE_COLOR: ret = snprintf(*pbuf, buf_len, "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; case AV_OPT_TYPE_CHLAYOUT: ret = av_channel_layout_describe(dst, *pbuf, buf_len); break; case AV_OPT_TYPE_DICT: if (!*(AVDictionary **)dst && (search_flags & AV_OPT_ALLOW_NULL)) { *pbuf = NULL; return 0; } return av_dict_get_string(*(AVDictionary **)dst, (char **)pbuf, '=', ':'); default: return AVERROR(EINVAL); } return ret; } static int opt_get_array(const AVOption *o, void *dst, uint8_t **out_val) { const unsigned count = *opt_array_pcount(dst); const uint8_t sep = opt_array_sep(o); uint8_t *str = NULL; size_t str_len = 0; int ret; *out_val = NULL; for (unsigned i = 0; i < count; i++) { uint8_t buf[128], *out = buf; size_t out_len; ret = opt_get_elem(o, &out, sizeof(buf), opt_array_pelem(o, *(void **)dst, i), 0); if (ret < 0) goto fail; out_len = strlen(out); if (out_len > SIZE_MAX / 2 - !!i || !!i + out_len * 2 > SIZE_MAX - str_len - 1) { ret = AVERROR(ERANGE); goto fail; } // terminator escaping separator // ↓ ↓ ↓ ret = av_reallocp(&str, str_len + 1 + out_len * 2 + !!i); if (ret < 0) goto fail; // add separator if needed if (i) str[str_len++] = sep; // escape the element for (unsigned j = 0; j < out_len; j++) { uint8_t val = out[j]; if (val == sep || val == '\\') str[str_len++] = '\\'; str[str_len++] = val; } str[str_len] = 0; fail: if (out != buf) av_freep(&out); if (ret < 0) { av_freep(&str); return ret; } } *out_val = str; return 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 *out, buf[128]; int ret; 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; if (o->type & AV_OPT_TYPE_FLAG_ARRAY) { ret = opt_get_array(o, dst, out_val); if (ret < 0) return ret; if (!*out_val && !(search_flags & AV_OPT_ALLOW_NULL)) { *out_val = av_strdup(""); if (!*out_val) return AVERROR(ENOMEM); } return 0; } buf[0] = 0; out = buf; ret = opt_get_elem(o, &out, sizeof(buf), dst, search_flags); if (ret < 0) return ret; if (out != buf) { *out_val = out; return 0; } if (ret >= sizeof(buf)) return AVERROR(EINVAL); *out_val = av_strdup(out); return *out_val ? 0 : AVERROR(ENOMEM); } static int get_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->type & AV_OPT_TYPE_FLAG_ARRAY) return AVERROR(EINVAL); dst = ((uint8_t *)target_obj) + o->offset; return read_number(o, dst, num, den, intnum); } 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, &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, &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, &num, &den, &intnum, search_flags)) < 0) return ret; if (num == 1.0 && (int)intnum == intnum) *out_val = (AVRational){intnum, den}; else *out_val = double_to_rational(num*intnum/den); return 0; } int av_opt_get_image_size(void *obj, const char *name, int search_flags, int *w_out, int *h { 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 a 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_ { return av_opt_get_q(obj, name, search_flags, out_val); } static int get_format(void *obj, const char *name, int search_flags, void *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; if (type == AV_OPT_TYPE_PIXEL_FMT) *(enum AVPixelFormat *)out_fmt = *(enum AVPixelFormat *)dst; else *(enum AVSampleFormat*)out_fmt = *(enum AVSampleFormat*)dst; return 0; } int av_opt_get_pixel_fmt(void *obj, const char *name, int search_flags, enum AVPixelForma { 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 AVSampleFor { return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_SAMPLE_FMT, "sample"); } int av_opt_get_chlayout(void *obj, const char *name, int search_flags, AVChannelLayout *c { 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 { 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); return av_dict_copy(out_val, src, 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 log_type(void *av_log_obj, const AVOption *o, enum AVOptionType parent_type) { const enum AVOptionType type = TYPE_BASE(o->type); if (o->type == AV_OPT_TYPE_CONST && (TYPE_BASE(parent_type) == AV_OPT_TYPE_INT || TYPE_BASE( av_log(av_log_obj, AV_LOG_INFO, "%-12"PRId64" ", o->default_val.i64); else if (type < FF_ARRAY_ELEMS(opt_type_desc) && opt_type_desc[type].name) { if (o->type & AV_OPT_TYPE_FLAG_ARRAY) av_log(av_log_obj, AV_LOG_INFO, "[%-10s]", opt_type_desc[type].name); else av_log(av_log_obj, AV_LOG_INFO, "%-12s ", opt_type_desc[type].name); } else av_log(av_log_obj, AV_LOG_INFO, "%-12s ", ""); } static void log_default(void *obj, void *av_log_obj, const AVOption *opt) { if (opt->type == AV_OPT_TYPE_CONST || opt->type == AV_OPT_TYPE_BINARY) return; if ((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) return; if (opt->type & AV_OPT_TYPE_FLAG_ARRAY) { const AVOptionArrayDef *arr = opt->default_val.arr; if (arr && arr->def) av_log(av_log_obj, AV_LOG_INFO, " (default %s)", arr->def); return; } 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", get_bool_name(opt->default_val.i64)); 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_UINT: 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->d 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(op 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; } av_log(av_log_obj, AV_LOG_INFO, ")"); } 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); log_type(av_log_obj, opt, parent_type); 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_UINT: 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); } log_default(obj, av_log_obj, opt); 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; if (opt->type & AV_OPT_TYPE_FLAG_ARRAY) { const AVOptionArrayDef *arr = opt->default_val.arr; const char sep = opt_array_sep(opt); av_assert0(sep && sep != '\\' && (sep < 'a' || sep > 'z') && (sep < 'A' || sep > 'Z') && (sep < '0' || sep > '9')); if (arr && arr->def) opt_set_array(s, s, opt, arr->def, dst); 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_UINT: case AV_OPT_TYPE_INT64: case AV_OPT_TYPE_UINT64: case AV_OPT_TYPE_DURATION: 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", ke 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; const char *key; if (!opts) return 0; if (!shorthand) shorthand = &dummy_shorthand; while (*opts) { char *parsed_key, *value; 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))) { void *pitem = (uint8_t *)obj + o->offset; if (o->type & AV_OPT_TYPE_FLAG_ARRAY) opt_free_array(o, pitem, opt_array_pcount(pitem)); else opt_free_elem(o->type, pitem); } } 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; } #if FF_API_OPT_PTR void *av_opt_ptr(const AVClass *class, void *obj, const char *name) { const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_S // no direct access to array-type options if (!opt || (opt->type & AV_OPT_TYPE_FLAG_ARRAY)) return NULL; return (uint8_t*)obj + opt->offset; } #endif static int opt_copy_elem(void *logctx, enum AVOptionType type, void *dst, const void *src) { if (type == AV_OPT_TYPE_STRING) { const char *src_str = *(const char *const *)src; char **dstp = (char **)dst; if (*dstp != src_str) av_freep(dstp); if (src_str) { *dstp = av_strdup(src_str); if (!*dstp) return AVERROR(ENOMEM); } } else if (type == AV_OPT_TYPE_BINARY) { const uint8_t *const *src8 = (const uint8_t *const *)src; uint8_t **dst8 = (uint8_t **)dst; int len = *(const int *)(src8 + 1); if (*dst8 != *src8) av_freep(dst8); *dst8 = av_memdup(*src8, len); if (len && !*dst8) { *(int *)(dst8 + 1) = 0; return AVERROR(ENOMEM); } *(int *)(dst8 + 1) = len; } else if (type == AV_OPT_TYPE_CONST) { // do nothing } else if (type == AV_OPT_TYPE_DICT) { const AVDictionary *sdict = *(const AVDictionary * const *)src; AVDictionary **ddictp = (AVDictionary **)dst; if (sdict != *ddictp) av_dict_free(ddictp); *ddictp = NULL; return av_dict_copy(ddictp, sdict, 0); } else if (type == AV_OPT_TYPE_CHLAYOUT) { if (dst != src) return av_channel_layout_copy(dst, src); } else if (opt_is_pod(type)) { size_t size = opt_type_desc[type].size; memcpy(dst, src, size); } else { av_log(logctx, AV_LOG_ERROR, "Unhandled option type: %d\n", type); return AVERROR(EINVAL); } return 0; } static int opt_copy_array(void *logctx, const AVOption *o, void **pdst, const void * const *psrc) { unsigned nb_elems = *opt_array_pcount(psrc); void *dst = NULL; int ret; if (*pdst == *psrc) { *pdst = NULL; *opt_array_pcount(pdst) = 0; } opt_free_array(o, pdst, opt_array_pcount(pdst)); dst = av_calloc(nb_elems, opt_type_desc[TYPE_BASE(o->type)].size); if (!dst) return AVERROR(ENOMEM); for (unsigned i = 0; i < nb_elems; i++) { ret = opt_copy_elem(logctx, TYPE_BASE(o->type), opt_array_pelem(o, dst, i), opt_array_pelem(o, *(void**)psrc, i)); if (ret < 0) { opt_free_array(o, &dst, &nb_elems); return ret; } } *pdst = dst; *opt_array_pcount(pdst) = nb_elems; return 0; } 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; int err = (o->type & AV_OPT_TYPE_FLAG_ARRAY) ? opt_copy_array(dst, o, field_dst, field_src) : opt_copy_elem (dst, o->type, field_dst, field_src); if (err < 0) ret = err; } return ret; } int av_opt_get_array_size(void *obj, const char *name, int search_flags, unsigned int *out_val) { void *target_obj, *parray; const AVOption *o; 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_FLAG_ARRAY)) return AVERROR(EINVAL); parray = (uint8_t *)target_obj + o->offset; *out_val = *opt_array_pcount(parray); return 0; } int av_opt_get_array(void *obj, const char *name, int search_flags, unsigned int start_elem, unsigned int nb_elems, enum AVOptionType out_type, void *out_val) { const size_t elem_size_out = opt_type_desc[TYPE_BASE(out_type)].size; const AVOption *o; void *target_obj; const void *parray; unsigned array_size; int ret; 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_FLAG_ARRAY) || (out_type & AV_OPT_TYPE_FLAG_ARRAY)) return AVERROR(EINVAL); parray = (uint8_t *)target_obj + o->offset; array_size = *opt_array_pcount(parray); if (start_elem >= array_size || array_size - start_elem < nb_elems) return AVERROR(EINVAL); for (unsigned i = 0; i < nb_elems; i++) { const void *src = opt_array_pelem(o, *(void**)parray, start_elem + i); void *dst = (uint8_t*)out_val + i * elem_size_out; if (out_type == TYPE_BASE(o->type)) { ret = opt_copy_elem(obj, out_type, dst, src); if (ret < 0) goto fail; } else if (out_type == AV_OPT_TYPE_STRING) { uint8_t buf[128], *out = buf; ret = opt_get_elem(o, &out, sizeof(buf), src, search_flags); if (ret < 0) goto fail; if (out == buf) { out = av_strdup(buf); if (!out) { ret = AVERROR(ENOMEM); goto fail; } } *(uint8_t**)dst = out; } else if (out_type == AV_OPT_TYPE_INT64 || out_type == AV_OPT_TYPE_DOUBLE || out_type == AV_OPT_TYPE_RATIONAL) { double num = 1.0; int den = 1; int64_t intnum = 1; ret = read_number(o, src, &num, &den, &intnum); if (ret < 0) goto fail; switch (out_type) { case AV_OPT_TYPE_INT64: *(int64_t*)dst = (num == den) ? intnum : num * intnum / den; break; case AV_OPT_TYPE_DOUBLE: *(double*)dst = num * intnum / den; break; case AV_OPT_TYPE_RATIONAL: *(AVRational*)dst = (num == 1.0 && (int)intnum == intnum) ? (AVRational){ intnum, den } : double_to_rational(num * intnum / den); break; default: av_assert0(0); } } else return AVERROR(ENOSYS); } return 0; fail: for (unsigned i = 0; i < nb_elems; i++) opt_free_elem(out_type, (uint8_t*)out_val + i * elem_size_out); return ret; } int av_opt_set_array(void *obj, const char *name, int search_flags, unsigned int start_elem, unsigned int nb_elems, enum AVOptionType val_type, const void *val) { const size_t elem_size_val = opt_type_desc[TYPE_BASE(val_type)].size; const AVOption *o; const AVOptionArrayDef *arr; void *target_obj; void *parray; void *new_elems; unsigned *array_size, new_size; size_t elem_size; int ret = 0; ret = opt_set_init(obj, name, search_flags, 0, &target_obj, &o, &parray); if (ret < 0) return ret; if (!(o->type & AV_OPT_TYPE_FLAG_ARRAY) || (val_type & AV_OPT_TYPE_FLAG_ARRAY)) return AVERROR(EINVAL); arr = o->default_val.arr; array_size = opt_array_pcount(parray); elem_size = opt_type_desc[TYPE_BASE(o->type)].size; if (start_elem > *array_size) return AVERROR(EINVAL); // compute new array size if (!val) { if (*array_size - start_elem < nb_elems) return AVERROR(EINVAL); new_size = *array_size - nb_elems; } else if (search_flags & AV_OPT_ARRAY_REPLACE) { if (start_elem >= UINT_MAX - nb_elems) return AVERROR(EINVAL); new_size = FFMAX(*array_size, start_elem + nb_elems); } else { if (nb_elems >= UINT_MAX - *array_size) return AVERROR(EINVAL); new_size = *array_size + nb_elems; } if (arr && ((arr->size_max && new_size > arr->size_max) || (arr->size_min && new_size < arr->size_min))) return AVERROR(EINVAL); // desired operation is shrinking the array if (!val) { void *array = *(void**)parray; for (unsigned i = 0; i < nb_elems; i++) { opt_free_elem(o->type, opt_array_pelem(o, array, start_elem + i)); } if (new_size > 0) { memmove(opt_array_pelem(o, array, start_elem), opt_array_pelem(o, array, start_elem + nb_elems), elem_size * (*array_size - start_elem - nb_elems)); array = av_realloc_array(array, new_size, elem_size); if (!array) return AVERROR(ENOMEM); *(void**)parray = array; } else av_freep(parray); *array_size = new_size; return 0; } // otherwise, desired operation is insert/replace; // first, store new elements in a separate array to simplify // rollback on failure new_elems = av_calloc(nb_elems, elem_size); if (!new_elems) return AVERROR(ENOMEM); // convert/validate each new element for (unsigned i = 0; i < nb_elems; i++) { void *dst = opt_array_pelem(o, new_elems, i); const void *src = (uint8_t*)val + i * elem_size_val; double num = 1.0; int den = 1; int64_t intnum = 1; if (val_type == TYPE_BASE(o->type)) { int err; ret = opt_copy_elem(obj, val_type, dst, src); if (ret < 0) goto fail; // validate the range for numeric options err = read_number(o, dst, &num, &den, &intnum); if (err >= 0 && TYPE_BASE(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, "Cannot set array element %u for " "parameter '%s': value %f out of range [%g - %g]\n", start_elem + i, o->name, num, o->min, o->max); ret = AVERROR(ERANGE); goto fail; } } else if (val_type == AV_OPT_TYPE_STRING) { ret = opt_set_elem(obj, target_obj, o, *(const char **)src, dst); if (ret < 0) goto fail; } else if (val_type == AV_OPT_TYPE_INT || val_type == AV_OPT_TYPE_INT64 || val_type == AV_OPT_TYPE_FLOAT || val_type == AV_OPT_TYPE_DOUBLE || val_type == AV_OPT_TYPE_RATIONAL) { switch (val_type) { case AV_OPT_TYPE_INT: intnum = *(int*)src; break; case AV_OPT_TYPE_INT64: intnum = *(int64_t*)src; break; case AV_OPT_TYPE_FLOAT: num = *(float*)src; break; case AV_OPT_TYPE_DOUBLE: num = *(double*)src; break; case AV_OPT_TYPE_RATIONAL: intnum = ((AVRational*)src)->num; den = ((AVRational*)src)->den; break; default: av_assert0(0); } ret = write_number(obj, o, dst, num, den, intnum); if (ret < 0) goto fail; } else { ret = AVERROR(ENOSYS); goto fail; } } // commit new elements to the array if (start_elem == 0 && nb_elems == new_size) { // replacing the existing array entirely opt_free_array(o, parray, array_size); *(void**)parray = new_elems; *array_size = nb_elems; new_elems = NULL; nb_elems = 0; } else { void *array = av_realloc_array(*(void**)parray, new_size, elem_size); if (!array) { ret = AVERROR(ENOMEM); goto fail; } if (search_flags & AV_OPT_ARRAY_REPLACE) { // free the elements being overwritten for (unsigned i = start_elem; i < FFMIN(start_elem + nb_elems, *array_size); i++) opt_free_elem(o->type, opt_array_pelem(o, array, i)); } else { // shift existing elements to the end memmove(opt_array_pelem(o, array, start_elem + nb_elems), opt_array_pelem(o, array, start_elem), elem_size * (*array_size - start_elem)); } memcpy((uint8_t*)array + elem_size * start_elem, new_elems, elem_size * nb_elems); av_freep(&new_elems); nb_elems = 0; *(void**)parray = array; *array_size = new_size; } fail: opt_free_array(o, &new_elems, &nb_elems); return ret; } int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flag { 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 { 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_UINT: 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: 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; AVRational q; int ret, w, h; char *str; void *dst; if (!o || !obj) return AVERROR(EINVAL); dst = ((uint8_t*)obj) + o->offset; if (o->type & AV_OPT_TYPE_FLAG_ARRAY) { const char *def = o->default_val.arr ? o->default_val.arr->def : NULL; uint8_t *val; ret = opt_get_array(o, dst, &val); if (ret < 0) return ret; if (!!val != !!def) ret = 0; else if (val) ret = !strcmp(val, def); else ret = 1; av_freep(&val); return ret; } 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: case AV_OPT_TYPE_UINT: 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; } ret = !av_channel_layout_compare((AVChannelLayout *)dst, &ch_layout); av_channel_layout_uninit(&ch_layout); return ret; } 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: d = *(double *)dst; return o->default_val.dbl == d; case AV_OPT_TYPE_FLOAT: d = *(float *)dst; return (float)o->default_val.dbl == 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->n 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); } static int opt_serialize(void *obj, int opt_flags, int flags, int *cnt, AVBPrint *bprint, const char key_val_sep, const char pairs_sep) { const AVOption *o = NULL; void *child = NULL; uint8_t *buf; int ret; const char special_chars[] = {pairs_sep, key_val_sep, '\0'}; if (flags & AV_OPT_SERIALIZE_SEARCH_CHILDREN) while (child = av_opt_child_next(obj, child)) { ret = opt_serialize(child, opt_flags, flags, cnt, bprint, key_val_sep, pairs_sep); if (ret < 0) return ret; } 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); } } return 0; } int av_opt_serialize(void *obj, int opt_flags, int flags, char **buffer, const char key_val_sep, const char pairs_sep) { AVBPrint bprint; int ret, cnt = 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); ret = opt_serialize(obj, opt_flags, flags, &cnt, &bprint, key_val_sep, pairs_sep); if (ret < 0) return ret; ret = av_bprint_finalize(&bprint, buffer); if (ret < 0) return ret; return 0; }
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2026-08-25