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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_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:
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(const AVOption *o, void *ptr)
{
switch (TYPE_BASE(o->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, 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 (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_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:
*(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_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_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(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);
av_dict_copy(dst, val, 0);
return 0;
}
int av_opt_set_chlayout(void *obj, const char *name,
const AVChannelLayout *channel_layout,
int search_flags)
{
void *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
AVChannelLayout *dst;
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
dst = (AVChannelLayout*)((uint8_t*)target_obj + o->offset);
return av_channel_layout_copy(dst, channel_layout);
}
static void format_duration(char *buf, size_t size, int64_t d)
{
char *e;
av_assert0(size >= 25);
if (d < 0 && d != INT64_MIN) {
*(buf++) = '-';
size--;
d = -d;
}
if (d == INT64_MAX)
snprintf(buf, size, "INT64_MAX");
else if (d == INT64_MIN)
snprintf(buf, size, "INT64_MIN");
else if (d > (int64_t)3600*1000000)
snprintf(buf, size, "%"PRId64":%02d:%02d.%06d", d / 3600000000,
(int)((d / 60000000) % 60),
(int)((d / 1000000) % 60),
(int)(d % 1000000));
else if (d > 60*1000000)
snprintf(buf, size, "%d:%02d.%06d",
(int)(d / 60000000),
(int)((d / 1000000) % 60),
(int)(d % 1000000));
else
snprintf(buf, size, "%d.%06d",
(int)(d / 1000000),
(int)(d % 1000000));
e = buf + strlen(buf);
while (e > buf && e[-1] == '0')
*(--e) = 0;
if (e > buf && e[-1] == '.')
*(--e) = 0;
}
static int opt_get_elem(const AVOption *o, uint8_t **pbuf, size_t buf_len,
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_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)
{
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;
}
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);
}