int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
{
if(!strcmp(cmd, "ping")) {
av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
return 0;
} else if(!strcmp(cmd, "enable")) {
return set_enable_expr(filter, arg);
} else if(filter->filter->process_command) {
return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
}
return AVERROR(ENOSYS);
}
int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
{
if(!strcmp(cmd, "ping")){
char local_res[256] = {0};
if (!res) {
res = local_res;
res_len = sizeof(local_res);
}
av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
if (res == local_res)
av_log(filter, AV_LOG_INFO, "%s", res);
return 0;
}else if(!strcmp(cmd, "enable")) {
return set_enable_expr(filter, arg);
}else if(filter->filter->process_command) {
return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
}
return AVERROR(ENOSYS);
}
static int process_options(AVFilterContext *ctx, AVDictionary **options,
const char *args)
{
const AVOption *o = NULL;
int ret, count = 0;
char *av_uninit(parsed_key), *av_uninit(value);
const char *key;
int offset= -1;
if (!args)
return 0;
while (*args) {
const char *shorthand = NULL;
o = av_opt_next(ctx->priv, o);
if (o) {
if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
continue;
offset = o->offset;
shorthand = o->name;
}
ret = av_opt_get_key_value(&args, "=", ":",
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", args);
else
av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
av_err2str(ret));
return ret;
}
if (*args)
args++;
if (parsed_key) {
key = parsed_key;
while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
} else {
key = shorthand;
}
av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
if (av_opt_find(ctx, key, NULL, 0, 0)) {
ret = av_opt_set(ctx, key, value, 0);
if (ret < 0) {
av_free(value);
av_free(parsed_key);
return ret;
}
} else {
av_dict_set(options, key, value, 0);
if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
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++;
}
if (ctx->enable_str) {
ret = set_enable_expr(ctx, ctx->enable_str);
if (ret < 0)
return ret;
}
return count;
}
