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Fix the av_set_string() free / alloc issue. 

Originally committed as revision 14134 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-07-08 23:50:03 +00:00
parent cdb5af79e3
commit 8dbee6538d
3 changed files with 28 additions and 9 deletions
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14
ffmpeg.c
View File

@ -2203,19 +2203,19 @@ static int opt_default(const char *opt, const char *arg){
for(type=0; type<CODEC_TYPE_NB; type++){
const AVOption *o2 = av_find_opt(avctx_opts[0], opt, NULL, opt_types[type], opt_types[type]);
if(o2)
o = av_set_string(avctx_opts[type], opt, arg);
o = av_set_string2(avctx_opts[type], opt, arg, 1);
}
if(!o)
o = av_set_string(avformat_opts, opt, arg);
o = av_set_string2(avformat_opts, opt, arg, 1);
if(!o)
o = av_set_string(sws_opts, opt, arg);
o = av_set_string2(sws_opts, opt, arg, 1);
if(!o){
if(opt[0] == 'a')
o = av_set_string(avctx_opts[CODEC_TYPE_AUDIO], opt+1, arg);
o = av_set_string2(avctx_opts[CODEC_TYPE_AUDIO], opt+1, arg, 1);
else if(opt[0] == 'v')
o = av_set_string(avctx_opts[CODEC_TYPE_VIDEO], opt+1, arg);
o = av_set_string2(avctx_opts[CODEC_TYPE_VIDEO], opt+1, arg, 1);
else if(opt[0] == 's')
o = av_set_string(avctx_opts[CODEC_TYPE_SUBTITLE], opt+1, arg);
o = av_set_string2(avctx_opts[CODEC_TYPE_SUBTITLE], opt+1, arg, 1);
}
if(!o)
return -1;
@ -2694,7 +2694,7 @@ static void set_context_opts(void *ctx, void *opts_ctx, int flags)
const char *str= av_get_string(opts_ctx, opt_names[i], &opt, buf, sizeof(buf));
/* if an option with name opt_names[i] is present in opts_ctx then str is non-NULL */
if(str && ((opt->flags & flags) == flags))
av_set_string(ctx, opt_names[i], str);
av_set_string2(ctx, opt_names[i], str, 1);
}
}

11
libavcodec/opt.c
View File

@ -115,7 +115,7 @@ static int hexchar2int(char c) {
return -1;
}
const AVOption *av_set_string(void *obj, const char *name, const char *val){
const AVOption *av_set_string2(void *obj, const char *name, const char *val, int alloc){
const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
if(o && o->offset==0 && o->type == FF_OPT_TYPE_CONST && o->unit){
return set_all_opt(obj, o->unit, o->default_val);
@ -195,10 +195,19 @@ const AVOption *av_set_string(void *obj, const char *name, const char *val){
return NULL;
}
if(alloc){
av_free((void*)(((uint8_t*)obj) + o->offset));
val= av_strdup(val);
}
memcpy(((uint8_t*)obj) + o->offset, &val, sizeof(val));
return o;
}
const AVOption *av_set_string(void *obj, const char *name, const char *val){
return av_set_string2(obj, name, val, 0);
}
const AVOption *av_set_double(void *obj, const char *name, double n){
return av_set_number(obj, name, n, 1, 1);
}

12
libavcodec/opt.h
View File

@ -98,7 +98,17 @@ typedef struct AVOption {
* has been found
*/
const AVOption *av_find_opt(void *obj, const char *name, const char *unit, int mask, int flags);
const AVOption *av_set_string(void *obj, const char *name, const char *val);
attribute_deprecated const AVOption *av_set_string(void *obj, const char *name, const char *val);
/**
* Sets the field of obj with the given name to value.
* @param alloc when 1 then the old value will be av_freed() and the
* new av_strduped()
* when 0 then no av_free() nor av_strdup() will be used
*/
const AVOption *av_set_string2(void *obj, const char *name, const char *val, int alloc);
const AVOption *av_set_double(void *obj, const char *name, double n);
const AVOption *av_set_q(void *obj, const char *name, AVRational n);
const AVOption *av_set_int(void *obj, const char *name, int64_t n);