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FFmpeg/libavutil/opt.c
Andreas Rheinhardt 7e03d962a4 avutil/opt: Check directly for av_dict_copy() failure 
av_dict_copy() returned void when this code was written.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-06-08 12:52:50 +02:00

2111 lines
68 KiB
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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 "common.h"
#include "dict.h"
#include "eval.h"
#include "log.h"
#include "parseutils.h"
#include "pixdesc.h"
#include "mathematics.h"
#include "opt.h"
#include "samplefmt.h"
#include "bprint.h"
#include <float.h>
const AVOption *av_opt_next(const void *obj, const AVOption *last)
{
const AVClass *class;
if (!obj)
return NULL;
class = *(const AVClass**)obj;
if (!last && class && class->option && class->option[0].name)
return class->option;
if (last && last[1].name)
return ++last;
return NULL;
}
static int read_number(const AVOption *o, const void *dst, double *num, int *den, int64_t *intnum)
{
switch (o->type) {
case AV_OPT_TYPE_FLAGS:
*intnum = *(unsigned int*)dst;
return 0;
case AV_OPT_TYPE_PIXEL_FMT:
*intnum = *(enum AVPixelFormat *)dst;
return 0;
case AV_OPT_TYPE_SAMPLE_FMT:
*intnum = *(enum AVSampleFormat *)dst;
return 0;
case AV_OPT_TYPE_BOOL:
case AV_OPT_TYPE_INT:
*intnum = *(int *)dst;
return 0;
case AV_OPT_TYPE_CHANNEL_LAYOUT:
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:
*num = o->default_val.dbl;
return 0;
}
return AVERROR(EINVAL);
}
static int write_number(void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum)
{
if (o->type != AV_OPT_TYPE_FLAGS &&
(!den || o->max * den < num * intnum || o->min * den > num * intnum)) {
num = den ? num * intnum / den : (num && intnum ? INFINITY : NAN);
av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range [%g - %g]\n",
num, o->name, o->min, o->max);
return AVERROR(ERANGE);
}
if (o->type == AV_OPT_TYPE_FLAGS) {
double d = num*intnum/den;
if (d < -1.5 || d > 0xFFFFFFFF+0.5 || (llrint(d*256) & 255)) {
av_log(obj, AV_LOG_ERROR,
"Value %f for parameter '%s' is not a valid set of 32bit integer flags\n",
num*intnum/den, o->name);
return AVERROR(ERANGE);
}
}
switch (o->type) {
case AV_OPT_TYPE_PIXEL_FMT:
*(enum AVPixelFormat *)dst = llrint(num / den) * intnum;
break;
case AV_OPT_TYPE_SAMPLE_FMT:
*(enum AVSampleFormat *)dst = llrint(num / den) * intnum;
break;
case AV_OPT_TYPE_BOOL:
case AV_OPT_TYPE_FLAGS:
case AV_OPT_TYPE_INT:
*(int *)dst = llrint(num / den) * intnum;
break;
case AV_OPT_TYPE_DURATION:
case AV_OPT_TYPE_CHANNEL_LAYOUT:
case AV_OPT_TYPE_INT64:{
double d = num / den;
if (intnum == 1 && d == (double)INT64_MAX) {
*(int64_t *)dst = INT64_MAX;
} else
*(int64_t *)dst = llrint(d) * intnum;
break;}
case AV_OPT_TYPE_UINT64:{
double d = num / den;
// We must special case uint64_t here as llrint() does not support values
// outside the int64_t range and there is no portable function which does
// "INT64_MAX + 1ULL" is used as it is representable exactly as IEEE double
// while INT64_MAX is not
if (intnum == 1 && d == (double)UINT64_MAX) {
*(uint64_t *)dst = UINT64_MAX;
} else if (d > INT64_MAX + 1ULL) {
*(uint64_t *)dst = (llrint(d - (INT64_MAX + 1ULL)) + (INT64_MAX + 1ULL))*intnum;
} else {
*(uint64_t *)dst = llrint(d) * intnum;
}
break;}
case AV_OPT_TYPE_FLOAT:
*(float *)dst = num * intnum / den;
break;
case AV_OPT_TYPE_DOUBLE:
*(double *)dst = num * intnum / den;
break;
case AV_OPT_TYPE_RATIONAL:
case AV_OPT_TYPE_VIDEO_RATE:
if ((int) num == num)
*(AVRational *)dst = (AVRational) { num *intnum, den };
else
*(AVRational *)dst = av_d2q(num * intnum / den, 1 << 24);
break;
default:
return AVERROR(EINVAL);
}
return 0;
}
static int hexchar2int(char c) {
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
return -1;
}
static int set_string_binary(void *obj, const AVOption *o, const char *val, uint8_t **dst)
{
int *lendst = (int *)(dst + 1);
uint8_t *bin, *ptr;
int len;
av_freep(dst);
*lendst = 0;
if (!val || !(len = strlen(val)))
return 0;
if (len & 1)
return AVERROR(EINVAL);
len /= 2;
ptr = bin = av_malloc(len);
if (!ptr)
return AVERROR(ENOMEM);
while (*val) {
int a = hexchar2int(*val++);
int b = hexchar2int(*val++);
if (a < 0 || b < 0) {
av_free(bin);
return AVERROR(EINVAL);
}
*ptr++ = (a << 4) | b;
}
*dst = bin;
*lendst = len;
return 0;
}
static int set_string(void *obj, const AVOption *o, const char *val, uint8_t **dst)
{
av_freep(dst);
*dst = av_strdup(val);
return *dst ? 0 : AVERROR(ENOMEM);
}
#define DEFAULT_NUMVAL(opt) ((opt->type == AV_OPT_TYPE_INT64 || \
opt->type == AV_OPT_TYPE_UINT64 || \
opt->type == AV_OPT_TYPE_CONST || \
opt->type == AV_OPT_TYPE_FLAGS || \
opt->type == AV_OPT_TYPE_INT) \
? opt->default_val.i64 \
: opt->default_val.dbl)
static int set_string_number(void *obj, void *target_obj, const AVOption *o, const char *val, void *dst)
{
int ret = 0;
if (o->type == AV_OPT_TYPE_RATIONAL || o->type == AV_OPT_TYPE_VIDEO_RATE) {
int num, den;
char c;
if (sscanf(val, "%d%*1[:/]%d%c", &num, &den, &c) == 2) {
if ((ret = write_number(obj, o, dst, 1, den, num)) >= 0)
return ret;
ret = 0;
}
}
for (;;) {
int i = 0;
char buf[256];
int cmd = 0;
double d;
int64_t intnum = 1;
if (o->type == AV_OPT_TYPE_FLAGS) {
if (*val == '+' || *val == '-')
cmd = *(val++);
for (; i < sizeof(buf) - 1 && val[i] && val[i] != '+' && val[i] != '-'; i++)
buf[i] = val[i];
buf[i] = 0;
}
{
int res;
int ci = 0;
double const_values[64];
const char * const_names[64];
int search_flags = (o->flags & AV_OPT_FLAG_CHILD_CONSTS) ? AV_OPT_SEARCH_CHILDREN : 0;
const AVOption *o_named = av_opt_find(target_obj, i ? buf : val, o->unit, 0, search_flags);
if (o_named && o_named->type == AV_OPT_TYPE_CONST)
d = DEFAULT_NUMVAL(o_named);
else {
if (o->unit) {
for (o_named = NULL; o_named = av_opt_next(target_obj, o_named); ) {
if (o_named->type == AV_OPT_TYPE_CONST &&
o_named->unit &&
!strcmp(o_named->unit, o->unit)) {
if (ci + 6 >= FF_ARRAY_ELEMS(const_values)) {
av_log(obj, AV_LOG_ERROR, "const_values array too small for %s\n", o->unit);
return AVERROR_PATCHWELCOME;
}
const_names [ci ] = o_named->name;
const_values[ci++] = DEFAULT_NUMVAL(o_named);
}
}
}
const_names [ci ] = "default";
const_values[ci++] = DEFAULT_NUMVAL(o);
const_names [ci ] = "max";
const_values[ci++] = o->max;
const_names [ci ] = "min";
const_values[ci++] = o->min;
const_names [ci ] = "none";
const_values[ci++] = 0;
const_names [ci ] = "all";
const_values[ci++] = ~0;
const_names [ci] = NULL;
const_values[ci] = 0;
res = av_expr_parse_and_eval(&d, i ? buf : val, const_names,
const_values, NULL, NULL, NULL, NULL, NULL, 0, obj);
if (res < 0) {
av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\"\n", val);
return res;
}
}
}
if (o->type == AV_OPT_TYPE_FLAGS) {
read_number(o, dst, NULL, NULL, &intnum);
if (cmd == '+')
d = intnum | (int64_t)d;
else if (cmd == '-')
d = intnum &~(int64_t)d;
}
if ((ret = write_number(obj, o, dst, d, 1, 1)) < 0)
return ret;
val += i;
if (!i || !*val)
return 0;
}
}
static int set_string_image_size(void *obj, const AVOption *o, const char *val, int *dst)
{
int ret;
if (!val || !strcmp(val, "none")) {
dst[0] =
dst[1] = 0;
return 0;
}
ret = av_parse_video_size(dst, dst + 1, val);
if (ret < 0)
av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as image size\n", val);
return ret;
}
static int set_string_video_rate(void *obj, const AVOption *o, const char *val, AVRational *dst)
{
int ret = av_parse_video_rate(dst, val);
if (ret < 0)
av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as video rate\n", val);
return ret;
}
static int set_string_color(void *obj, const AVOption *o, const char *val, uint8_t *dst)
{
int ret;
if (!val) {
return 0;
} else {
ret = av_parse_color(dst, val, -1, obj);
if (ret < 0)
av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as color\n", val);
return ret;
}
return 0;
}
static const char *get_bool_name(int val)
{
if (val < 0)
return "auto";
return val ? "true" : "false";
}
static int set_string_bool(void *obj, const AVOption *o, const char *val, int *dst)
{
int n;
if (!val)
return 0;
if (!strcmp(val, "auto")) {
n = -1;
} else if (av_match_name(val, "true,y,yes,enable,enabled,on")) {
n = 1;
} else if (av_match_name(val, "false,n,no,disable,disabled,off")) {
n = 0;
} else {
char *end = NULL;
n = strtol(val, &end, 10);
if (val + strlen(val) != end)
goto fail;
}
if (n < o->min || n > o->max)
goto fail;
*dst = n;
return 0;
fail:
av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as boolean\n", val);
return AVERROR(EINVAL);
}
static int set_string_fmt(void *obj, const AVOption *o, const char *val, uint8_t *dst,
int fmt_nb, int ((*get_fmt)(const char *)), const char *desc)
{
int fmt, min, max;
if (!val || !strcmp(val, "none")) {
fmt = -1;
} else {
fmt = get_fmt(val);
if (fmt == -1) {
char *tail;
fmt = strtol(val, &tail, 0);
if (*tail || (unsigned)fmt >= fmt_nb) {
av_log(obj, AV_LOG_ERROR,
"Unable to parse option value \"%s\" as %s\n", val, desc);
return AVERROR(EINVAL);
}
}
}
min = FFMAX(o->min, -1);
max = FFMIN(o->max, fmt_nb-1);
// hack for compatibility with old ffmpeg
if(min == 0 && max == 0) {
min = -1;
max = fmt_nb-1;
}
if (fmt < min || fmt > max) {
av_log(obj, AV_LOG_ERROR,
"Value %d for parameter '%s' out of %s format range [%d - %d]\n",
fmt, o->name, desc, min, max);
return AVERROR(ERANGE);
}
*(int *)dst = fmt;
return 0;
}
static int 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, av_get_pix_fmt, "pixel format");
}
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, av_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;
}
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
{
int ret = 0;
void *dst, *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (!val && (o->type != AV_OPT_TYPE_STRING &&
o->type != AV_OPT_TYPE_PIXEL_FMT && o->type != AV_OPT_TYPE_SAMPLE_FMT &&
o->type != AV_OPT_TYPE_IMAGE_SIZE &&
o->type != AV_OPT_TYPE_DURATION && o->type != AV_OPT_TYPE_COLOR &&
o->type != AV_OPT_TYPE_CHANNEL_LAYOUT && o->type != AV_OPT_TYPE_BOOL))
return AVERROR(EINVAL);
if (o->flags & AV_OPT_FLAG_READONLY)
return AVERROR(EINVAL);
if (o->flags & AV_OPT_FLAG_DEPRECATED)
av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help);
dst = ((uint8_t *)target_obj) + o->offset;
switch (o->type) {
case AV_OPT_TYPE_BOOL:
return set_string_bool(obj, o, val, dst);
case AV_OPT_TYPE_STRING:
return set_string(obj, o, val, dst);
case AV_OPT_TYPE_BINARY:
return set_string_binary(obj, o, val, dst);
case AV_OPT_TYPE_FLAGS:
case AV_OPT_TYPE_INT:
case AV_OPT_TYPE_INT64:
case AV_OPT_TYPE_UINT64:
case AV_OPT_TYPE_FLOAT:
case AV_OPT_TYPE_DOUBLE:
case AV_OPT_TYPE_RATIONAL:
return set_string_number(obj, target_obj, o, val, dst);
case AV_OPT_TYPE_IMAGE_SIZE:
return set_string_image_size(obj, o, val, dst);
case AV_OPT_TYPE_VIDEO_RATE: {
AVRational tmp;
ret = set_string_video_rate(obj, o, val, &tmp);
if (ret < 0)
return ret;
return write_number(obj, o, dst, 1, tmp.den, tmp.num);
}
case AV_OPT_TYPE_PIXEL_FMT:
return set_string_pixel_fmt(obj, o, val, dst);
case AV_OPT_TYPE_SAMPLE_FMT:
return set_string_sample_fmt(obj, o, val, dst);
case AV_OPT_TYPE_DURATION:
{
int64_t usecs = 0;
if (val) {
if ((ret = av_parse_time(&usecs, val, 1)) < 0) {
av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as duration\n", val);
return ret;
}
}
if (usecs < o->min || usecs > o->max) {
av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range [%g - %g]\n",
usecs / 1000000.0, o->name, o->min / 1000000.0, o->max / 1000000.0);
return AVERROR(ERANGE);
}
*(int64_t *)dst = usecs;
return 0;
}
case AV_OPT_TYPE_COLOR:
return set_string_color(obj, o, val, dst);
case AV_OPT_TYPE_CHANNEL_LAYOUT:
if (!val || !strcmp(val, "none")) {
*(int64_t *)dst = 0;
} else {
int64_t cl = av_get_channel_layout(val);
if (!cl) {
av_log(obj, AV_LOG_ERROR, "Unable to parse option value \"%s\" as channel layout\n", val);
ret = AVERROR(EINVAL);
}
*(int64_t *)dst = cl;
return ret;
}
break;
case AV_OPT_TYPE_DICT:
return set_string_dict(obj, o, val, dst);
}
av_log(obj, AV_LOG_ERROR, "Invalid option type.\n");
return AVERROR(EINVAL);
}
#define OPT_EVAL_NUMBER(name, opttype, vartype) \
int av_opt_eval_ ## name(void *obj, const AVOption *o, \
const char *val, vartype *name ## _out) \
{ \
if (!o || o->type != opttype || o->flags & AV_OPT_FLAG_READONLY) \
return AVERROR(EINVAL); \
return set_string_number(obj, obj, o, val, name ## _out); \
}
OPT_EVAL_NUMBER(flags, AV_OPT_TYPE_FLAGS, int)
OPT_EVAL_NUMBER(int, AV_OPT_TYPE_INT, int)
OPT_EVAL_NUMBER(int64, AV_OPT_TYPE_INT64, int64_t)
OPT_EVAL_NUMBER(float, AV_OPT_TYPE_FLOAT, float)
OPT_EVAL_NUMBER(double, AV_OPT_TYPE_DOUBLE, double)
OPT_EVAL_NUMBER(q, AV_OPT_TYPE_RATIONAL, AVRational)
static int set_number(void *obj, const char *name, double num, int den, int64_t intnum,
int search_flags)
{
void *dst, *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->flags & AV_OPT_FLAG_READONLY)
return AVERROR(EINVAL);
dst = ((uint8_t *)target_obj) + o->offset;
return write_number(obj, o, dst, num, den, intnum);
}
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
{
return set_number(obj, name, 1, 1, val, search_flags);
}
int av_opt_set_double(void *obj, const char *name, double val, int search_flags)
{
return set_number(obj, name, val, 1, 1, search_flags);
}
int av_opt_set_q(void *obj, const char *name, AVRational val, int search_flags)
{
return set_number(obj, name, val.num, val.den, 1, search_flags);
}
int av_opt_set_bin(void *obj, const char *name, const uint8_t *val, int len, int search_flags)
{
void *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
uint8_t *ptr;
uint8_t **dst;
int *lendst;
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->type != AV_OPT_TYPE_BINARY || o->flags & AV_OPT_FLAG_READONLY)
return AVERROR(EINVAL);
ptr = len ? av_malloc(len) : NULL;
if (len && !ptr)
return AVERROR(ENOMEM);
dst = (uint8_t **)(((uint8_t *)target_obj) + o->offset);
lendst = (int *)(dst + 1);
av_free(*dst);
*dst = ptr;
*lendst = len;
if (len)
memcpy(ptr, val, len);
return 0;
}
int av_opt_set_image_size(void *obj, const char *name, int w, int h, int search_flags)
{
void *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->type != AV_OPT_TYPE_IMAGE_SIZE) {
av_log(obj, AV_LOG_ERROR,
"The value set by option '%s' is not an image size.\n", o->name);
return AVERROR(EINVAL);
}
if (w<0 || h<0) {
av_log(obj, AV_LOG_ERROR,
"Invalid negative size value %dx%d for size '%s'\n", w, h, o->name);
return AVERROR(EINVAL);
}
*(int *)(((uint8_t *)target_obj) + o->offset) = w;
*(int *)(((uint8_t *)target_obj+sizeof(int)) + o->offset) = h;
return 0;
}
int av_opt_set_video_rate(void *obj, const char *name, AVRational val, int search_flags)
{
void *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->type != AV_OPT_TYPE_VIDEO_RATE) {
av_log(obj, AV_LOG_ERROR,
"The value set by option '%s' is not a video rate.\n", o->name);
return AVERROR(EINVAL);
}
if (val.num <= 0 || val.den <= 0)
return AVERROR(EINVAL);
return set_number(obj, name, val.num, val.den, 1, search_flags);
}
static int set_format(void *obj, const char *name, int fmt, int search_flags,
enum AVOptionType type, const char *desc, int nb_fmts)
{
void *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0,
search_flags, &target_obj);
int min, max;
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->type != type) {
av_log(obj, AV_LOG_ERROR,
"The value set by option '%s' is not a %s format", name, desc);
return AVERROR(EINVAL);
}
min = FFMAX(o->min, -1);
max = FFMIN(o->max, nb_fmts-1);
if (fmt < min || fmt > max) {
av_log(obj, AV_LOG_ERROR,
"Value %d for parameter '%s' out of %s format range [%d - %d]\n",
fmt, name, desc, min, max);
return AVERROR(ERANGE);
}
*(int *)(((uint8_t *)target_obj) + o->offset) = fmt;
return 0;
}
int av_opt_set_pixel_fmt(void *obj, const char *name, enum AVPixelFormat fmt, int search_flags)
{
return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_PIXEL_FMT, "pixel", AV_PIX_FMT_NB);
}
int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search_flags)
{
return set_format(obj, name, fmt, search_flags, AV_OPT_TYPE_SAMPLE_FMT, "sample", AV_SAMPLE_FMT_NB);
}
int av_opt_set_channel_layout(void *obj, const char *name, int64_t cl, int search_flags)
{
void *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->type != AV_OPT_TYPE_CHANNEL_LAYOUT) {
av_log(obj, AV_LOG_ERROR,
"The value set by option '%s' is not a channel layout.\n", o->name);
return AVERROR(EINVAL);
}
*(int64_t *)(((uint8_t *)target_obj) + o->offset) = cl;
return 0;
}
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;
}
static void format_duration(char *buf, size_t size, int64_t d)
{
char *e;
av_assert0(size >= 25);
if (d < 0 && d != INT64_MIN) {
*(buf++) = '-';
size--;
d = -d;
}
if (d == INT64_MAX)
snprintf(buf, size, "INT64_MAX");
else if (d == INT64_MIN)
snprintf(buf, size, "INT64_MIN");
else if (d > (int64_t)3600*1000000)
snprintf(buf, size, "%"PRId64":%02d:%02d.%06d", d / 3600000000,
(int)((d / 60000000) % 60),
(int)((d / 1000000) % 60),
(int)(d % 1000000));
else if (d > 60*1000000)
snprintf(buf, size, "%d:%02d.%06d",
(int)(d / 60000000),
(int)((d / 1000000) % 60),
(int)(d % 1000000));
else
snprintf(buf, size, "%d.%06d",
(int)(d / 1000000),
(int)(d % 1000000));
e = buf + strlen(buf);
while (e > buf && e[-1] == '0')
*(--e) = 0;
if (e > buf && e[-1] == '.')
*(--e) = 0;
}
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
{
void *dst, *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
uint8_t *bin, buf[128];
int len, i, ret;
int64_t i64;
if (!o || !target_obj || (o->offset<=0 && o->type != AV_OPT_TYPE_CONST))
return AVERROR_OPTION_NOT_FOUND;
if (o->flags & AV_OPT_FLAG_DEPRECATED)
av_log(obj, AV_LOG_WARNING, "The \"%s\" option is deprecated: %s\n", name, o->help);
dst = (uint8_t *)target_obj + o->offset;
buf[0] = 0;
switch (o->type) {
case AV_OPT_TYPE_BOOL:
ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(get_bool_name(*(int *)dst), "invalid"));
break;
case AV_OPT_TYPE_FLAGS:
ret = snprintf(buf, sizeof(buf), "0x%08X", *(int *)dst);
break;
case AV_OPT_TYPE_INT:
ret = snprintf(buf, sizeof(buf), "%d", *(int *)dst);
break;
case AV_OPT_TYPE_INT64:
ret = snprintf(buf, sizeof(buf), "%"PRId64, *(int64_t *)dst);
break;
case AV_OPT_TYPE_UINT64:
ret = snprintf(buf, sizeof(buf), "%"PRIu64, *(uint64_t *)dst);
break;
case AV_OPT_TYPE_FLOAT:
ret = snprintf(buf, sizeof(buf), "%f", *(float *)dst);
break;
case AV_OPT_TYPE_DOUBLE:
ret = snprintf(buf, sizeof(buf), "%f", *(double *)dst);
break;
case AV_OPT_TYPE_VIDEO_RATE:
case AV_OPT_TYPE_RATIONAL:
ret = snprintf(buf, sizeof(buf), "%d/%d", ((AVRational *)dst)->num, ((AVRational *)dst)->den);
break;
case AV_OPT_TYPE_CONST:
ret = snprintf(buf, sizeof(buf), "%f", o->default_val.dbl);
break;
case AV_OPT_TYPE_STRING:
if (*(uint8_t **)dst) {
*out_val = av_strdup(*(uint8_t **)dst);
} else if (search_flags & AV_OPT_ALLOW_NULL) {
*out_val = NULL;
return 0;
} else {
*out_val = av_strdup("");
}
return *out_val ? 0 : AVERROR(ENOMEM);
case AV_OPT_TYPE_BINARY:
if (!*(uint8_t **)dst && (search_flags & AV_OPT_ALLOW_NULL)) {
*out_val = NULL;
return 0;
}
len = *(int *)(((uint8_t *)dst) + sizeof(uint8_t *));
if ((uint64_t)len * 2 + 1 > INT_MAX)
return AVERROR(EINVAL);
if (!(*out_val = av_malloc(len * 2 + 1)))
return AVERROR(ENOMEM);
if (!len) {
*out_val[0] = '\0';
return 0;
}
bin = *(uint8_t **)dst;
for (i = 0; i < len; i++)
snprintf(*out_val + i * 2, 3, "%02X", bin[i]);
return 0;
case AV_OPT_TYPE_IMAGE_SIZE:
ret = snprintf(buf, sizeof(buf), "%dx%d", ((int *)dst)[0], ((int *)dst)[1]);
break;
case AV_OPT_TYPE_PIXEL_FMT:
ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_pix_fmt_name(*(enum AVPixelFormat *)dst), "none"));
break;
case AV_OPT_TYPE_SAMPLE_FMT:
ret = snprintf(buf, sizeof(buf), "%s", (char *)av_x_if_null(av_get_sample_fmt_name(*(enum AVSampleFormat *)dst), "none"));
break;
case AV_OPT_TYPE_DURATION:
i64 = *(int64_t *)dst;
format_duration(buf, sizeof(buf), i64);
ret = strlen(buf); // no overflow possible, checked by an assert
break;
case AV_OPT_TYPE_COLOR:
ret = snprintf(buf, sizeof(buf), "0x%02x%02x%02x%02x",
(int)((uint8_t *)dst)[0], (int)((uint8_t *)dst)[1],
(int)((uint8_t *)dst)[2], (int)((uint8_t *)dst)[3]);
break;
case AV_OPT_TYPE_CHANNEL_LAYOUT:
i64 = *(int64_t *)dst;
ret = snprintf(buf, sizeof(buf), "0x%"PRIx64, i64);
break;
case AV_OPT_TYPE_DICT:
if (!*(AVDictionary **)dst && (search_flags & AV_OPT_ALLOW_NULL)) {
*out_val = NULL;
return 0;
}
return av_dict_get_string(*(AVDictionary **)dst, (char **)out_val, '=', ':');
default:
return AVERROR(EINVAL);
}
if (ret >= sizeof(buf))
return AVERROR(EINVAL);
*out_val = av_strdup(buf);
return *out_val ? 0 : AVERROR(ENOMEM);
}
static int get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum,
int search_flags)
{
void *dst, *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
goto error;
dst = ((uint8_t *)target_obj) + o->offset;
if (o_out) *o_out= o;
return read_number(o, dst, num, den, intnum);
error:
*den =
*intnum = 0;
return -1;
}
int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)
{
int64_t intnum = 1;
double num = 1;
int ret, den = 1;
if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
return ret;
*out_val = num * intnum / den;
return 0;
}
int av_opt_get_double(void *obj, const char *name, int search_flags, double *out_val)
{
int64_t intnum = 1;
double num = 1;
int ret, den = 1;
if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
return ret;
*out_val = num * intnum / den;
return 0;
}
int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_val)
{
int64_t intnum = 1;
double num = 1;
int ret, den = 1;
if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
return ret;
if (num == 1.0 && (int)intnum == intnum)
*out_val = (AVRational){intnum, den};
else
*out_val = av_d2q(num*intnum/den, 1<<24);
return 0;
}
int av_opt_get_image_size(void *obj, const char *name, int search_flags, int *w_out, int *h_out)
{
void *dst, *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->type != AV_OPT_TYPE_IMAGE_SIZE) {
av_log(obj, AV_LOG_ERROR,
"The value for option '%s' is not an image size.\n", name);
return AVERROR(EINVAL);
}
dst = ((uint8_t*)target_obj) + o->offset;
if (w_out) *w_out = *(int *)dst;
if (h_out) *h_out = *((int *)dst+1);
return 0;
}
int av_opt_get_video_rate(void *obj, const char *name, int search_flags, AVRational *out_val)
{
int64_t intnum = 1;
double num = 1;
int ret, den = 1;
if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
return ret;
if (num == 1.0 && (int)intnum == intnum)
*out_val = (AVRational) { intnum, den };
else
*out_val = av_d2q(num * intnum / den, 1 << 24);
return 0;
}
static int get_format(void *obj, const char *name, int search_flags, int *out_fmt,
enum AVOptionType type, const char *desc)
{
void *dst, *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->type != type) {
av_log(obj, AV_LOG_ERROR,
"The value for option '%s' is not a %s format.\n", desc, name);
return AVERROR(EINVAL);
}
dst = ((uint8_t*)target_obj) + o->offset;
*out_fmt = *(int *)dst;
return 0;
}
int av_opt_get_pixel_fmt(void *obj, const char *name, int search_flags, enum AVPixelFormat *out_fmt)
{
return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_PIXEL_FMT, "pixel");
}
int av_opt_get_sample_fmt(void *obj, const char *name, int search_flags, enum AVSampleFormat *out_fmt)
{
return get_format(obj, name, search_flags, out_fmt, AV_OPT_TYPE_SAMPLE_FMT, "sample");
}
int av_opt_get_channel_layout(void *obj, const char *name, int search_flags, int64_t *cl)
{
void *dst, *target_obj;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->type != AV_OPT_TYPE_CHANNEL_LAYOUT) {
av_log(obj, AV_LOG_ERROR,
"The value for option '%s' is not a channel layout.\n", name);
return AVERROR(EINVAL);
}
dst = ((uint8_t*)target_obj) + o->offset;
*cl = *(int64_t *)dst;
return 0;
}
int av_opt_get_dict_val(void *obj, const char *name, int search_flags, AVDictionary **out_val)
{
void *target_obj;
AVDictionary *src;
const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj);
if (!o || !target_obj)
return AVERROR_OPTION_NOT_FOUND;
if (o->type != AV_OPT_TYPE_DICT)
return AVERROR(EINVAL);
src = *(AVDictionary **)(((uint8_t *)target_obj) + o->offset);
av_dict_copy(out_val, src, 0);
return 0;
}
int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)
{
const AVOption *field = av_opt_find(obj, field_name, NULL, 0, 0);
const AVOption *flag = av_opt_find(obj, flag_name,
field ? field->unit : NULL, 0, 0);
int64_t res;
if (!field || !flag || flag->type != AV_OPT_TYPE_CONST ||
av_opt_get_int(obj, field_name, 0, &res) < 0)
return 0;
return res & flag->default_val.i64;
}
static void log_int_value(void *av_log_obj, int level, int64_t i)
{
if (i == INT_MAX) {
av_log(av_log_obj, level, "INT_MAX");
} else if (i == INT_MIN) {
av_log(av_log_obj, level, "INT_MIN");
} else if (i == UINT32_MAX) {
av_log(av_log_obj, level, "UINT32_MAX");
} else if (i == INT64_MAX) {
av_log(av_log_obj, level, "I64_MAX");
} else if (i == INT64_MIN) {
av_log(av_log_obj, level, "I64_MIN");
} else {
av_log(av_log_obj, level, "%"PRId64, i);
}
}
static void log_value(void *av_log_obj, int level, double d)
{
if (d == INT_MAX) {
av_log(av_log_obj, level, "INT_MAX");
} else if (d == INT_MIN) {
av_log(av_log_obj, level, "INT_MIN");
} else if (d == UINT32_MAX) {
av_log(av_log_obj, level, "UINT32_MAX");
} else if (d == (double)INT64_MAX) {
av_log(av_log_obj, level, "I64_MAX");
} else if (d == INT64_MIN) {
av_log(av_log_obj, level, "I64_MIN");
} else if (d == FLT_MAX) {
av_log(av_log_obj, level, "FLT_MAX");
} else if (d == FLT_MIN) {
av_log(av_log_obj, level, "FLT_MIN");
} else if (d == -FLT_MAX) {
av_log(av_log_obj, level, "-FLT_MAX");
} else if (d == -FLT_MIN) {
av_log(av_log_obj, level, "-FLT_MIN");
} else if (d == DBL_MAX) {
av_log(av_log_obj, level, "DBL_MAX");
} else if (d == DBL_MIN) {
av_log(av_log_obj, level, "DBL_MIN");
} else if (d == -DBL_MAX) {
av_log(av_log_obj, level, "-DBL_MAX");
} else if (d == -DBL_MIN) {
av_log(av_log_obj, level, "-DBL_MIN");
} else {
av_log(av_log_obj, level, "%g", d);
}
}
static const char *get_opt_const_name(void *obj, const char *unit, int64_t value)
{
const AVOption *opt = NULL;
if (!unit)
return NULL;
while ((opt = av_opt_next(obj, opt)))
if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) &&
opt->default_val.i64 == value)
return opt->name;
return NULL;
}
static char *get_opt_flags_string(void *obj, const char *unit, int64_t value)
{
const AVOption *opt = NULL;
char flags[512];
flags[0] = 0;
if (!unit)
return NULL;
while ((opt = av_opt_next(obj, opt))) {
if (opt->type == AV_OPT_TYPE_CONST && !strcmp(opt->unit, unit) &&
opt->default_val.i64 & value) {
if (flags[0])
av_strlcatf(flags, sizeof(flags), "+");
av_strlcatf(flags, sizeof(flags), "%s", opt->name);
}
}
if (flags[0])
return av_strdup(flags);
return NULL;
}
static void opt_list(void *obj, void *av_log_obj, const char *unit,
int req_flags, int rej_flags, enum AVOptionType parent_type)
{
const AVOption *opt = NULL;
AVOptionRanges *r;
int i;
while ((opt = av_opt_next(obj, opt))) {
if (!(opt->flags & req_flags) || (opt->flags & rej_flags))
continue;
/* Don't print CONST's on level one.
* Don't print anything but CONST's on level two.
* Only print items from the requested unit.
*/
if (!unit && opt->type == AV_OPT_TYPE_CONST)
continue;
else if (unit && opt->type != AV_OPT_TYPE_CONST)
continue;
else if (unit && opt->type == AV_OPT_TYPE_CONST && strcmp(unit, opt->unit))
continue;
else if (unit && opt->type == AV_OPT_TYPE_CONST)
av_log(av_log_obj, AV_LOG_INFO, " %-15s ", opt->name);
else
av_log(av_log_obj, AV_LOG_INFO, " %s%-17s ",
(opt->flags & AV_OPT_FLAG_FILTERING_PARAM) ? "" : "-",
opt->name);
switch (opt->type) {
case AV_OPT_TYPE_FLAGS:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<flags>");
break;
case AV_OPT_TYPE_INT:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int>");
break;
case AV_OPT_TYPE_INT64:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<int64>");
break;
case AV_OPT_TYPE_UINT64:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<uint64>");
break;
case AV_OPT_TYPE_DOUBLE:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<double>");
break;
case AV_OPT_TYPE_FLOAT:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<float>");
break;
case AV_OPT_TYPE_STRING:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<string>");
break;
case AV_OPT_TYPE_RATIONAL:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<rational>");
break;
case AV_OPT_TYPE_BINARY:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<binary>");
break;
case AV_OPT_TYPE_DICT:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<dictionary>");
break;
case AV_OPT_TYPE_IMAGE_SIZE:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<image_size>");
break;
case AV_OPT_TYPE_VIDEO_RATE:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<video_rate>");
break;
case AV_OPT_TYPE_PIXEL_FMT:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<pix_fmt>");
break;
case AV_OPT_TYPE_SAMPLE_FMT:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<sample_fmt>");
break;
case AV_OPT_TYPE_DURATION:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<duration>");
break;
case AV_OPT_TYPE_COLOR:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<color>");
break;
case AV_OPT_TYPE_CHANNEL_LAYOUT:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<channel_layout>");
break;
case AV_OPT_TYPE_BOOL:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "<boolean>");
break;
case AV_OPT_TYPE_CONST:
if (parent_type == AV_OPT_TYPE_INT)
av_log(av_log_obj, AV_LOG_INFO, "%-12"PRId64" ", opt->default_val.i64);
else
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");
break;
default:
av_log(av_log_obj, AV_LOG_INFO, "%-12s ", "");
break;
}
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_ENCODING_PARAM) ? 'E' : '.');
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DECODING_PARAM) ? 'D' : '.');
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_FILTERING_PARAM)? 'F' : '.');
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_VIDEO_PARAM ) ? 'V' : '.');
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_AUDIO_PARAM ) ? 'A' : '.');
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_SUBTITLE_PARAM) ? 'S' : '.');
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_EXPORT) ? 'X' : '.');
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_READONLY) ? 'R' : '.');
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_BSF_PARAM) ? 'B' : '.');
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_RUNTIME_PARAM) ? 'T' : '.');
av_log(av_log_obj, AV_LOG_INFO, "%c", (opt->flags & AV_OPT_FLAG_DEPRECATED) ? 'P' : '.');
if (opt->help)
av_log(av_log_obj, AV_LOG_INFO, " %s", opt->help);
if (av_opt_query_ranges(&r, obj, opt->name, AV_OPT_SEARCH_FAKE_OBJ) >= 0) {
switch (opt->type) {
case AV_OPT_TYPE_INT:
case AV_OPT_TYPE_INT64:
case AV_OPT_TYPE_UINT64:
case AV_OPT_TYPE_DOUBLE:
case AV_OPT_TYPE_FLOAT:
case AV_OPT_TYPE_RATIONAL:
for (i = 0; i < r->nb_ranges; i++) {
av_log(av_log_obj, AV_LOG_INFO, " (from ");
log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_min);
av_log(av_log_obj, AV_LOG_INFO, " to ");
log_value(av_log_obj, AV_LOG_INFO, r->range[i]->value_max);
av_log(av_log_obj, AV_LOG_INFO, ")");
}
break;
}
av_opt_freep_ranges(&r);
}
if (opt->type != AV_OPT_TYPE_CONST &&
opt->type != AV_OPT_TYPE_BINARY &&
!((opt->type == AV_OPT_TYPE_COLOR ||
opt->type == AV_OPT_TYPE_IMAGE_SIZE ||
opt->type == AV_OPT_TYPE_STRING ||
opt->type == AV_OPT_TYPE_DICT ||
opt->type == AV_OPT_TYPE_VIDEO_RATE) &&
!opt->default_val.str)) {
av_log(av_log_obj, AV_LOG_INFO, " (default ");
switch (opt->type) {
case AV_OPT_TYPE_BOOL:
av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(get_bool_name(opt->default_val.i64), "invalid"));
break;
case AV_OPT_TYPE_FLAGS: {
char *def_flags = get_opt_flags_string(obj, opt->unit, opt->default_val.i64);
if (def_flags) {
av_log(av_log_obj, AV_LOG_INFO, "%s", def_flags);
av_freep(&def_flags);
} else {
av_log(av_log_obj, AV_LOG_INFO, "%"PRIX64, opt->default_val.i64);
}
break;
}
case AV_OPT_TYPE_DURATION: {
char buf[25];
format_duration(buf, sizeof(buf), opt->default_val.i64);
av_log(av_log_obj, AV_LOG_INFO, "%s", buf);
break;
}
case AV_OPT_TYPE_INT:
case AV_OPT_TYPE_UINT64:
case AV_OPT_TYPE_INT64: {
const char *def_const = get_opt_const_name(obj, opt->unit, opt->default_val.i64);
if (def_const)
av_log(av_log_obj, AV_LOG_INFO, "%s", def_const);
else
log_int_value(av_log_obj, AV_LOG_INFO, opt->default_val.i64);
break;
}
case AV_OPT_TYPE_DOUBLE:
case AV_OPT_TYPE_FLOAT:
log_value(av_log_obj, AV_LOG_INFO, opt->default_val.dbl);
break;
case AV_OPT_TYPE_RATIONAL: {
AVRational q = av_d2q(opt->default_val.dbl, INT_MAX);
av_log(av_log_obj, AV_LOG_INFO, "%d/%d", q.num, q.den); }
break;
case AV_OPT_TYPE_PIXEL_FMT:
av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_pix_fmt_name(opt->default_val.i64), "none"));
break;
case AV_OPT_TYPE_SAMPLE_FMT:
av_log(av_log_obj, AV_LOG_INFO, "%s", (char *)av_x_if_null(av_get_sample_fmt_name(opt->default_val.i64), "none"));
break;
case AV_OPT_TYPE_COLOR:
case AV_OPT_TYPE_IMAGE_SIZE:
case AV_OPT_TYPE_STRING:
case AV_OPT_TYPE_DICT:
case AV_OPT_TYPE_VIDEO_RATE:
av_log(av_log_obj, AV_LOG_INFO, "\"%s\"", opt->default_val.str);
break;
case AV_OPT_TYPE_CHANNEL_LAYOUT:
av_log(av_log_obj, AV_LOG_INFO, "0x%"PRIx64, opt->default_val.i64);
break;
}
av_log(av_log_obj, AV_LOG_INFO, ")");
}
av_log(av_log_obj, AV_LOG_INFO, "\n");
if (opt->unit && opt->type != AV_OPT_TYPE_CONST)
opt_list(obj, av_log_obj, opt->unit, req_flags, rej_flags, opt->type);
}
}
int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags)
{
if (!obj)
return -1;
av_log(av_log_obj, AV_LOG_INFO, "%s AVOptions:\n", (*(AVClass **)obj)->class_name);
opt_list(obj, av_log_obj, NULL, req_flags, rej_flags, -1);
return 0;
}
void av_opt_set_defaults(void *s)
{
av_opt_set_defaults2(s, 0, 0);
}
void av_opt_set_defaults2(void *s, int mask, int flags)
{
const AVOption *opt = NULL;
while ((opt = av_opt_next(s, opt))) {
void *dst = ((uint8_t*)s) + opt->offset;
if ((opt->flags & mask) != flags)
continue;
if (opt->flags & AV_OPT_FLAG_READONLY)
continue;
switch (opt->type) {
case AV_OPT_TYPE_CONST:
/* Nothing to be done here */
break;
case AV_OPT_TYPE_BOOL:
case AV_OPT_TYPE_FLAGS:
case AV_OPT_TYPE_INT:
case AV_OPT_TYPE_INT64:
case AV_OPT_TYPE_UINT64:
case AV_OPT_TYPE_DURATION:
case AV_OPT_TYPE_CHANNEL_LAYOUT:
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_DICT:
set_string_dict(s, opt, opt->default_val.str, dst);
break;
default:
av_log(s, AV_LOG_DEBUG, "AVOption type %d of option %s not implemented yet\n",
opt->type, opt->name);
}
}
}
/**
* Store the value in the field in ctx that is named like key.
* ctx must be an AVClass context, storing is done using AVOptions.
*
* @param buf the string to parse, buf will be updated to point at the
* separator just after the parsed key/value pair
* @param key_val_sep a 0-terminated list of characters used to
* separate key from value
* @param pairs_sep a 0-terminated list of characters used to separate
* two pairs from each other
* @return 0 if the key/value pair has been successfully parsed and
* set, or a negative value corresponding to an AVERROR code in case
* of error:
* AVERROR(EINVAL) if the key/value pair cannot be parsed,
* the error code issued by av_opt_set() if the key/value pair
* cannot be set
*/
static int parse_key_value_pair(void *ctx, const char **buf,
const char *key_val_sep, const char *pairs_sep)
{
char *key = av_get_token(buf, key_val_sep);
char *val;
int ret;
if (!key)
return AVERROR(ENOMEM);
if (*key && strspn(*buf, key_val_sep)) {
(*buf)++;
val = av_get_token(buf, pairs_sep);
if (!val) {
av_freep(&key);
return AVERROR(ENOMEM);
}
} else {
av_log(ctx, AV_LOG_ERROR, "Missing key or no key/value separator found after key '%s'\n", key);
av_free(key);
return AVERROR(EINVAL);
}
av_log(ctx, AV_LOG_DEBUG, "Setting entry with key '%s' to value '%s'\n", key, val);
ret = av_opt_set(ctx, key, val, AV_OPT_SEARCH_CHILDREN);
if (ret == AVERROR_OPTION_NOT_FOUND)
av_log(ctx, AV_LOG_ERROR, "Key '%s' not found.\n", key);
av_free(key);
av_free(val);
return ret;
}
int av_set_options_string(void *ctx, const char *opts,
const char *key_val_sep, const char *pairs_sep)
{
int ret, count = 0;
if (!opts)
return 0;
while (*opts) {
if ((ret = parse_key_value_pair(ctx, &opts, key_val_sep, pairs_sep)) < 0)
return ret;
count++;
if (*opts)
opts++;
}
return count;
}
#define WHITESPACES " \n\t\r"
static int is_key_char(char c)
{
return (unsigned)((c | 32) - 'a') < 26 ||
(unsigned)(c - '0') < 10 ||
c == '-' || c == '_' || c == '/' || c == '.';
}
/**
* Read a key from a string.
*
* The key consists of is_key_char characters and must be terminated by a
* character from the delim string; spaces are ignored.
*
* @return 0 for success (even with ellipsis), <0 for failure
*/
static int get_key(const char **ropts, const char *delim, char **rkey)
{
const char *opts = *ropts;
const char *key_start, *key_end;
key_start = opts += strspn(opts, WHITESPACES);
while (is_key_char(*opts))
opts++;
key_end = opts;
opts += strspn(opts, WHITESPACES);
if (!*opts || !strchr(delim, *opts))
return AVERROR(EINVAL);
opts++;
if (!(*rkey = av_malloc(key_end - key_start + 1)))
return AVERROR(ENOMEM);
memcpy(*rkey, key_start, key_end - key_start);
(*rkey)[key_end - key_start] = 0;
*ropts = opts;
return 0;
}
int av_opt_get_key_value(const char **ropts,
const char *key_val_sep, const char *pairs_sep,
unsigned flags,
char **rkey, char **rval)
{
int ret;
char *key = NULL, *val;
const char *opts = *ropts;
if ((ret = get_key(&opts, key_val_sep, &key)) < 0 &&
!(flags & AV_OPT_FLAG_IMPLICIT_KEY))
return AVERROR(EINVAL);
if (!(val = av_get_token(&opts, pairs_sep))) {
av_free(key);
return AVERROR(ENOMEM);
}
*ropts = opts;
*rkey = key;
*rval = val;
return 0;
}
int av_opt_set_from_string(void *ctx, const char *opts,
const char *const *shorthand,
const char *key_val_sep, const char *pairs_sep)
{
int ret, count = 0;
const char *dummy_shorthand = NULL;
char *av_uninit(parsed_key), *av_uninit(value);
const char *key;
if (!opts)
return 0;
if (!shorthand)
shorthand = &dummy_shorthand;
while (*opts) {
ret = av_opt_get_key_value(&opts, key_val_sep, pairs_sep,
*shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
&parsed_key, &value);
if (ret < 0) {
if (ret == AVERROR(EINVAL))
av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", opts);
else
av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", opts,
av_err2str(ret));
return ret;
}
if (*opts)
opts++;
if (parsed_key) {
key = parsed_key;
while (*shorthand) /* discard all remaining shorthand */
shorthand++;
} else {
key = *(shorthand++);
}
av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
if ((ret = av_opt_set(ctx, key, value, 0)) < 0) {
if (ret == AVERROR_OPTION_NOT_FOUND)
av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
av_free(value);
av_free(parsed_key);
return ret;
}
av_free(value);
av_free(parsed_key);
count++;
}
return count;
}
void av_opt_free(void *obj)
{
const AVOption *o = NULL;
while ((o = av_opt_next(obj, o))) {
switch (o->type) {
case AV_OPT_TYPE_STRING:
case AV_OPT_TYPE_BINARY:
av_freep((uint8_t *)obj + o->offset);
break;
case AV_OPT_TYPE_DICT:
av_dict_free((AVDictionary **)(((uint8_t *)obj) + o->offset));
break;
default:
break;
}
}
}
int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)
{
AVDictionaryEntry *t = NULL;
AVDictionary *tmp = NULL;
int ret = 0;
if (!options)
return 0;
while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {
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, 0);
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;
}
ret = 0;
}
av_dict_free(options);
*options = tmp;
return ret;
}
int av_opt_set_dict(void *obj, AVDictionary **options)
{
return av_opt_set_dict2(obj, options, 0);
}
const AVOption *av_opt_find(void *obj, const char *name, const char *unit,
int opt_flags, int search_flags)
{
return av_opt_find2(obj, name, unit, opt_flags, search_flags, NULL);
}
const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,
int opt_flags, int search_flags, void **target_obj)
{
const AVClass *c;
const AVOption *o = NULL;
if(!obj)
return NULL;
c= *(AVClass**)obj;
if (!c)
return NULL;
if (search_flags & AV_OPT_SEARCH_CHILDREN) {
if (search_flags & AV_OPT_SEARCH_FAKE_OBJ) {
void *iter = NULL;
const AVClass *child;
while (child = av_opt_child_class_iterate(c, &iter))
if (o = av_opt_find2(&child, name, unit, opt_flags, search_flags, NULL))
return o;
} else {
void *child = NULL;
while (child = av_opt_child_next(obj, child))
if (o = av_opt_find2(child, name, unit, opt_flags, search_flags, target_obj))
return o;
}
}
while (o = av_opt_next(obj, o)) {
if (!strcmp(o->name, name) && (o->flags & opt_flags) == opt_flags &&
((!unit && o->type != AV_OPT_TYPE_CONST) ||
(unit && o->type == AV_OPT_TYPE_CONST && o->unit && !strcmp(o->unit, unit)))) {
if (target_obj) {
if (!(search_flags & AV_OPT_SEARCH_FAKE_OBJ))
*target_obj = obj;
else
*target_obj = NULL;
}
return o;
}
}
return NULL;
}
void *av_opt_child_next(void *obj, void *prev)
{
const AVClass *c = *(AVClass **)obj;
if (c->child_next)
return c->child_next(obj, prev);
return NULL;
}
const AVClass *av_opt_child_class_iterate(const AVClass *parent, void **iter)
{
if (parent->child_class_iterate)
return parent->child_class_iterate(iter);
return NULL;
}
void *av_opt_ptr(const AVClass *class, void *obj, const char *name)
{
const AVOption *opt= av_opt_find2(&class, name, NULL, 0, AV_OPT_SEARCH_FAKE_OBJ, NULL);
if(!opt)
return NULL;
return (uint8_t*)obj + opt->offset;
}
static int opt_size(enum AVOptionType type)
{
switch(type) {
case AV_OPT_TYPE_BOOL:
case AV_OPT_TYPE_INT:
case AV_OPT_TYPE_FLAGS:
return sizeof(int);
case AV_OPT_TYPE_DURATION:
case AV_OPT_TYPE_CHANNEL_LAYOUT:
case AV_OPT_TYPE_INT64:
case AV_OPT_TYPE_UINT64:
return sizeof(int64_t);
case AV_OPT_TYPE_DOUBLE:
return sizeof(double);
case AV_OPT_TYPE_FLOAT:
return sizeof(float);
case AV_OPT_TYPE_STRING:
return sizeof(uint8_t*);
case AV_OPT_TYPE_VIDEO_RATE:
case AV_OPT_TYPE_RATIONAL:
return sizeof(AVRational);
case AV_OPT_TYPE_BINARY:
return sizeof(uint8_t*) + sizeof(int);
case AV_OPT_TYPE_IMAGE_SIZE:
return sizeof(int[2]);
case AV_OPT_TYPE_PIXEL_FMT:
return sizeof(enum AVPixelFormat);
case AV_OPT_TYPE_SAMPLE_FMT:
return sizeof(enum AVSampleFormat);
case AV_OPT_TYPE_COLOR:
return 4;
}
return AVERROR(EINVAL);
}
int av_opt_copy(void *dst, const void *src)
{
const AVOption *o = NULL;
const AVClass *c;
int ret = 0;
if (!src)
return AVERROR(EINVAL);
c = *(AVClass **)src;
if (!c || c != *(AVClass **)dst)
return AVERROR(EINVAL);
while ((o = av_opt_next(src, o))) {
void *field_dst = (uint8_t *)dst + o->offset;
void *field_src = (uint8_t *)src + o->offset;
uint8_t **field_dst8 = (uint8_t **)field_dst;
uint8_t **field_src8 = (uint8_t **)field_src;
if (o->type == AV_OPT_TYPE_STRING) {
if (*field_dst8 != *field_src8)
av_freep(field_dst8);
*field_dst8 = av_strdup(*field_src8);
if (*field_src8 && !*field_dst8)
ret = AVERROR(ENOMEM);
} else if (o->type == AV_OPT_TYPE_BINARY) {
int len = *(int *)(field_src8 + 1);
if (*field_dst8 != *field_src8)
av_freep(field_dst8);
*field_dst8 = av_memdup(*field_src8, len);
if (len && !*field_dst8) {
ret = AVERROR(ENOMEM);
len = 0;
}
*(int *)(field_dst8 + 1) = len;
} else if (o->type == AV_OPT_TYPE_CONST) {
// do nothing
} else if (o->type == AV_OPT_TYPE_DICT) {
AVDictionary **sdict = (AVDictionary **) field_src;
AVDictionary **ddict = (AVDictionary **) field_dst;
int ret2;
if (*sdict != *ddict)
av_dict_free(ddict);
*ddict = NULL;
ret2 = av_dict_copy(ddict, *sdict, 0);
if (ret2 < 0)
ret = ret2;
} else {
int size = opt_size(o->type);
if (size < 0)
ret = size;
else
memcpy(field_dst, field_src, size);
}
}
return ret;
}
int av_opt_query_ranges(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)
{
int ret;
const AVClass *c = *(AVClass**)obj;
int (*callback)(AVOptionRanges **, void *obj, const char *key, int flags) = NULL;
if (c->version > (52 << 16 | 11 << 8))
callback = c->query_ranges;
if (!callback)
callback = av_opt_query_ranges_default;
ret = callback(ranges_arg, obj, key, flags);
if (ret >= 0) {
if (!(flags & AV_OPT_MULTI_COMPONENT_RANGE))
ret = 1;
(*ranges_arg)->nb_components = ret;
}
return ret;
}
int av_opt_query_ranges_default(AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)
{
AVOptionRanges *ranges = av_mallocz(sizeof(*ranges));
AVOptionRange **range_array = av_mallocz(sizeof(void*));
AVOptionRange *range = av_mallocz(sizeof(*range));
const AVOption *field = av_opt_find(obj, key, NULL, 0, flags);
int ret;
*ranges_arg = NULL;
if (!ranges || !range || !range_array || !field) {
ret = AVERROR(ENOMEM);
goto fail;
}
ranges->range = range_array;
ranges->range[0] = range;
ranges->nb_ranges = 1;
ranges->nb_components = 1;
range->is_range = 1;
range->value_min = field->min;
range->value_max = field->max;
switch (field->type) {
case AV_OPT_TYPE_BOOL:
case AV_OPT_TYPE_INT:
case AV_OPT_TYPE_INT64:
case AV_OPT_TYPE_UINT64:
case AV_OPT_TYPE_PIXEL_FMT:
case AV_OPT_TYPE_SAMPLE_FMT:
case AV_OPT_TYPE_FLOAT:
case AV_OPT_TYPE_DOUBLE:
case AV_OPT_TYPE_DURATION:
case AV_OPT_TYPE_COLOR:
case AV_OPT_TYPE_CHANNEL_LAYOUT:
break;
case AV_OPT_TYPE_STRING:
range->component_min = 0;
range->component_max = 0x10FFFF; // max unicode value
range->value_min = -1;
range->value_max = INT_MAX;
break;
case AV_OPT_TYPE_RATIONAL:
range->component_min = INT_MIN;
range->component_max = INT_MAX;
break;
case AV_OPT_TYPE_IMAGE_SIZE:
range->component_min = 0;
range->component_max = INT_MAX/128/8;
range->value_min = 0;
range->value_max = INT_MAX/8;
break;
case AV_OPT_TYPE_VIDEO_RATE:
range->component_min = 1;
range->component_max = INT_MAX;
range->value_min = 1;
range->value_max = INT_MAX;
break;
default:
ret = AVERROR(ENOSYS);
goto fail;
}
*ranges_arg = ranges;
return 1;
fail:
av_free(ranges);
av_free(range);
av_free(range_array);
return ret;
}
void av_opt_freep_ranges(AVOptionRanges **rangesp)
{
int i;
AVOptionRanges *ranges = *rangesp;
if (!ranges)
return;
for (i = 0; i < ranges->nb_ranges * ranges->nb_components; i++) {
AVOptionRange *range = ranges->range[i];
if (range) {
av_freep(&range->str);
av_freep(&ranges->range[i]);
}
}
av_freep(&ranges->range);
av_freep(rangesp);
}
int av_opt_is_set_to_default(void *obj, const AVOption *o)
{
int64_t i64;
double d, d2;
float f;
AVRational q;
int ret, w, h;
char *str;
void *dst;
if (!o || !obj)
return AVERROR(EINVAL);
dst = ((uint8_t*)obj) + o->offset;
switch (o->type) {
case AV_OPT_TYPE_CONST:
return 1;
case AV_OPT_TYPE_BOOL:
case AV_OPT_TYPE_FLAGS:
case AV_OPT_TYPE_PIXEL_FMT:
case AV_OPT_TYPE_SAMPLE_FMT:
case AV_OPT_TYPE_INT:
case AV_OPT_TYPE_CHANNEL_LAYOUT:
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_STRING:
str = *(char **)dst;
if (str == o->default_val.str) //2 NULLs
return 1;
if (!str || !o->default_val.str) //1 NULL
return 0;
return !strcmp(str, o->default_val.str);
case AV_OPT_TYPE_DOUBLE:
read_number(o, dst, &d, NULL, NULL);
return o->default_val.dbl == d;
case AV_OPT_TYPE_FLOAT:
read_number(o, dst, &d, NULL, NULL);
f = o->default_val.dbl;
d2 = f;
return d2 == d;
case AV_OPT_TYPE_RATIONAL:
q = av_d2q(o->default_val.dbl, INT_MAX);
return !av_cmp_q(*(AVRational*)dst, q);
case AV_OPT_TYPE_BINARY: {
struct {
uint8_t *data;
int size;
} tmp = {0};
int opt_size = *(int *)((void **)dst + 1);
void *opt_ptr = *(void **)dst;
if (!opt_size && (!o->default_val.str || !strlen(o->default_val.str)))
return 1;
if (!opt_size || !o->default_val.str || !strlen(o->default_val.str ))
return 0;
if (opt_size != strlen(o->default_val.str) / 2)
return 0;
ret = set_string_binary(NULL, NULL, o->default_val.str, &tmp.data);
if (!ret)
ret = !memcmp(opt_ptr, tmp.data, tmp.size);
av_free(tmp.data);
return ret;
}
case AV_OPT_TYPE_DICT: {
AVDictionary *dict1 = NULL;
AVDictionary *dict2 = *(AVDictionary **)dst;
AVDictionaryEntry *en1 = NULL;
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_get(dict1, "", en1, AV_DICT_IGNORE_SUFFIX);
en2 = av_dict_get(dict2, "", en2, AV_DICT_IGNORE_SUFFIX);
} while (en1 && en2 && !strcmp(en1->key, en2->key) && !strcmp(en1->value, en2->value));
av_dict_free(&dict1);
return (!en1 && !en2);
}
case AV_OPT_TYPE_IMAGE_SIZE:
if (!o->default_val.str || !strcmp(o->default_val.str, "none"))
w = h = 0;
else if ((ret = av_parse_video_size(&w, &h, o->default_val.str)) < 0)
return ret;
return (w == *(int *)dst) && (h == *((int *)dst+1));
case AV_OPT_TYPE_VIDEO_RATE:
q = (AVRational){0, 0};
if (o->default_val.str) {
if ((ret = av_parse_video_rate(&q, o->default_val.str)) < 0)
return ret;
}
return !av_cmp_q(*(AVRational*)dst, q);
case AV_OPT_TYPE_COLOR: {
uint8_t color[4] = {0, 0, 0, 0};
if (o->default_val.str) {
if ((ret = av_parse_color(color, o->default_val.str, -1, NULL)) < 0)
return ret;
}
return !memcmp(color, dst, sizeof(color));
}
default:
av_log(obj, AV_LOG_WARNING, "Not supported option type: %d, option name: %s\n", o->type, o->name);
break;
}
return AVERROR_PATCHWELCOME;
}
int av_opt_is_set_to_default_by_name(void *obj, const char *name, int search_flags)
{
const AVOption *o;
void *target;
if (!obj)
return AVERROR(EINVAL);
o = av_opt_find2(obj, name, NULL, 0, search_flags, &target);
if (!o)
return AVERROR_OPTION_NOT_FOUND;
return av_opt_is_set_to_default(target, o);
}
int av_opt_serialize(void *obj, int opt_flags, int flags, char **buffer,
const char key_val_sep, const char pairs_sep)
{
const AVOption *o = NULL;
uint8_t *buf;
AVBPrint bprint;
int ret, cnt = 0;
const char special_chars[] = {pairs_sep, key_val_sep, '\0'};
if (pairs_sep == '\0' || key_val_sep == '\0' || pairs_sep == key_val_sep ||
pairs_sep == '\\' || key_val_sep == '\\') {
av_log(obj, AV_LOG_ERROR, "Invalid separator(s) found.");
return AVERROR(EINVAL);
}
if (!obj || !buffer)
return AVERROR(EINVAL);
*buffer = NULL;
av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
while (o = av_opt_next(obj, o)) {
if (o->type == AV_OPT_TYPE_CONST)
continue;
if ((flags & AV_OPT_SERIALIZE_OPT_FLAGS_EXACT) && o->flags != opt_flags)
continue;
else if (((o->flags & opt_flags) != opt_flags))
continue;
if (flags & AV_OPT_SERIALIZE_SKIP_DEFAULTS && av_opt_is_set_to_default(obj, o) > 0)
continue;
if ((ret = av_opt_get(obj, o->name, 0, &buf)) < 0) {
av_bprint_finalize(&bprint, NULL);
return ret;
}
if (buf) {
if (cnt++)
av_bprint_append_data(&bprint, &pairs_sep, 1);
av_bprint_escape(&bprint, o->name, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
av_bprint_append_data(&bprint, &key_val_sep, 1);
av_bprint_escape(&bprint, buf, special_chars, AV_ESCAPE_MODE_BACKSLASH, 0);
av_freep(&buf);
}
}
ret = av_bprint_finalize(&bprint, buffer);
if (ret < 0)
return ret;
return 0;
}
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