static const AVClass *filter_child_class_next(const AVClass *prev)
{
const AVFilter *f = NULL;
while (prev && (f = avfilter_next(f)))
if (f->priv_class == prev)
break;
while ((f = avfilter_next(f)))
if (f->priv_class)
return f->priv_class;
return NULL;
}
static const AVClass *filter_child_class_next(const AVClass *prev)
{
const AVFilter *f = NULL;
/* find the filter that corresponds to prev */
while (prev && (f = avfilter_next(f)))
if (f->priv_class == prev)
break;
/* could not find filter corresponding to prev */
if (prev && !f)
return NULL;
/* find next filter with specific options */
while ((f = avfilter_next(f)))
if (f->priv_class)
return f->priv_class;
return NULL;
}
/**
* com.leixiaohua1020.sffmpegandroidhelloworld.MainActivity.avfilterinfo()
* AVFilter Support Information
*/
JNIEXPORT jstring Java_com_leixiaohua1020_sffmpegandroidhelloworld_MainActivity_avfilterinfo(JNIEnv *env, jobject obj)
{
char info[40000] = { 0 };
av_register_all();
AVFilter *f_temp = (AVFilter *)avfilter_next(NULL);
while (f_temp != NULL){
sprintf(info, "%s[%10s]\n", info, f_temp->name);
}
//LOGE("%s", info);
return (*env)->NewStringUTF(env, info);
}
const AVFilter *avfilter_get_by_name(const char *name)
{
const AVFilter *f = NULL;
if (!name)
return NULL;
while ((f = avfilter_next(f)))
if (!strcmp(f->name, name))
return f;
return NULL;
}
