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8c185ef4e7
FFmpeg/libavutil/opt.c
Marvin Scholz 8a314e3f11 lavu/opt: Fix return of uninitialised value 
In one of the failure paths of av_opt_get_array, the ret variable
was accidentally declared again, shadowing the outer one and once when
jumping to the fail label would return the still uninitialised outer
one.

To fix this simply remove the local declaration of ret that shadowed
the outer one.

Introduced in d89930f866

Fixes: CID1618663 Uninitialized scalar variable
2024-09-07 20:42:26 +02:00

2760 lines
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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 size_t opt_elem_size[] = {
[AV_OPT_TYPE_FLAGS] = sizeof(unsigned),
[AV_OPT_TYPE_INT] = sizeof(int),
[AV_OPT_TYPE_INT64] = sizeof(int64_t),
[AV_OPT_TYPE_UINT] = sizeof(unsigned),
[AV_OPT_TYPE_UINT64] = sizeof(uint64_t),
[AV_OPT_TYPE_DOUBLE] = sizeof(double),
[AV_OPT_TYPE_FLOAT] = sizeof(float),
[AV_OPT_TYPE_STRING] = sizeof(char *),
[AV_OPT_TYPE_RATIONAL] = sizeof(AVRational),
[AV_OPT_TYPE_BINARY] = sizeof(uint8_t *),
[AV_OPT_TYPE_DICT] = sizeof(AVDictionary *),
[AV_OPT_TYPE_IMAGE_SIZE] = sizeof(int[2]),
[AV_OPT_TYPE_VIDEO_RATE] = sizeof(AVRational),
[AV_OPT_TYPE_PIXEL_FMT] = sizeof(int),
[AV_OPT_TYPE_SAMPLE_FMT] = sizeof(int),
[AV_OPT_TYPE_DURATION] = sizeof(int64_t),
[AV_OPT_TYPE_COLOR] = sizeof(uint8_t[4]),
[AV_OPT_TYPE_CHLAYOUT] = sizeof(AVChannelLayout),
[AV_OPT_TYPE_BOOL] = sizeof(int),
};
// 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_elem_size[TYPE_BASE(o->type)];
}
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;
}
static int read_number(const AVOption *o, const void *dst, double *num, int *den, int64_t *intnum)
{
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 intnum)
{
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 = 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);
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 *val, void *dst)
{
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 option value \"%s\"\n", 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 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);
}
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 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);
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);
}
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_elem_size[TYPE_BASE(o->type)];
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 = 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);
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;
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)
{
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) || (o->type & AV_OPT_TYPE_FLAG_ARRAY))
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);
}
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);
return av_dict_copy(dst, val, 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;
if (o->flags & AV_OPT_FLAG_READONLY)
return AVERROR(EINVAL);
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;
}
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 AVPixelFormat *)dst), "none"));
break;
case AV_OPT_TYPE_SAMPLE_FMT:
ret = snprintf(*pbuf, buf_len, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(*(enum AVSampleFormat *)dst), "none"));
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 = 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 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_val)
{
return av_opt_get_q(obj, name, search_flags, out_val);
}
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");
}
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);
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 char *desc[] = {
[AV_OPT_TYPE_FLAGS] = "<flags>",
[AV_OPT_TYPE_INT] = "<int>",
[AV_OPT_TYPE_INT64] = "<int64>",
[AV_OPT_TYPE_UINT] = "<unsigned>",
[AV_OPT_TYPE_UINT64] = "<uint64>",
[AV_OPT_TYPE_DOUBLE] = "<double>",
[AV_OPT_TYPE_FLOAT] = "<float>",
[AV_OPT_TYPE_STRING] = "<string>",
[AV_OPT_TYPE_RATIONAL] = "<rational>",
[AV_OPT_TYPE_BINARY] = "<binary>",
[AV_OPT_TYPE_DICT] = "<dictionary>",
[AV_OPT_TYPE_IMAGE_SIZE] = "<image_size>",
[AV_OPT_TYPE_VIDEO_RATE] = "<video_rate>",
[AV_OPT_TYPE_PIXEL_FMT] = "<pix_fmt>",
[AV_OPT_TYPE_SAMPLE_FMT] = "<sample_fmt>",
[AV_OPT_TYPE_DURATION] = "<duration>",
[AV_OPT_TYPE_COLOR] = "<color>",
[AV_OPT_TYPE_CHLAYOUT] = "<channel_layout>",
[AV_OPT_TYPE_BOOL] = "<boolean>",
};
const enum AVOptionType type = TYPE_BASE(o->type);
if (o->type == AV_OPT_TYPE_CONST && TYPE_BASE(parent_type) == AV_OPT_TYPE_INT)
av_log(av_log_obj, AV_LOG_INFO, "%-12"PRId64" ", o->default_val.i64);
else if (type < FF_ARRAY_ELEMS(desc) && desc[type]) {
if (o->type & AV_OPT_TYPE_FLAG_ARRAY)
av_log(av_log_obj, AV_LOG_INFO, "[%-10s]", desc[type]);
else
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", desc[type]);
}
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->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;
}
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", 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;
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;
}
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);
// no direct access to array-type options
if (!opt || (opt->type & AV_OPT_TYPE_FLAG_ARRAY))
return NULL;
return (uint8_t*)obj + opt->offset;
}
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_elem_size[type];
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_elem_size[TYPE_BASE(o->type)]);
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_elem_size[TYPE_BASE(out_type)];
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 } :
av_d2q(num * intnum / den, 1<<24);
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_elem_size[TYPE_BASE(val_type)];
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;
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) ||
(val_type & AV_OPT_TYPE_FLAG_ARRAY))
return AVERROR(EINVAL);
arr = o->default_val.arr;
parray = (uint8_t *)target_obj + o->offset;
array_size = opt_array_pcount(parray);
elem_size = opt_elem_size[TYPE_BASE(o->type)];
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)) {
ret = opt_copy_elem(obj, val_type, dst, src);
if (ret < 0)
goto fail;
// validate the range for numeric options
ret = read_number(o, dst, &num, &den, &intnum);
if (ret >= 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;
} 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 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_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);
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->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);
}
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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