Commit c58572f8 authored by Stefano Sabatini's avatar Stefano Sabatini

Change the signature of create_filter() to make it return an error code.

Originally committed as revision 25691 to svn://
parent 8ce803db
......@@ -86,21 +86,20 @@ static char *parse_link_name(const char **buf, AVClass *log_ctx)
* filtergraph in *ctx.
* @param ctx the filtergraph context
* @param put here a filter context in case of successful creation and configuration, NULL otherwise.
* @param index an index which is supposed to be unique for each filter instance added to the filtergraph
* @param filt_name the name of the filter to create
* @param args the arguments provided to the filter during its initialization
* @param log_ctx the log context to use
* @return a filter context in case of successful creation and configuration, NULL otherwise.
* @return 0 in case of success, a negative AVERROR code otherwise
static AVFilterContext *create_filter(AVFilterGraph *ctx, int index,
const char *filt_name, const char *args,
AVClass *log_ctx)
static int create_filter(AVFilterContext **filt_ctx, AVFilterGraph *ctx, int index,
const char *filt_name, const char *args, AVClass *log_ctx)
AVFilterContext *filt_ctx;
AVFilter *filt;
char inst_name[30];
char tmp_args[256];
int ret;
snprintf(inst_name, sizeof(inst_name), "Filter %d %s", index, filt_name);
......@@ -109,19 +108,19 @@ static AVFilterContext *create_filter(AVFilterGraph *ctx, int index,
if (!filt) {
av_log(log_ctx, AV_LOG_ERROR,
"No such filter: '%s'\n", filt_name);
return NULL;
avfilter_open(&filt_ctx, filt, inst_name);
if (!filt_ctx) {
ret = avfilter_open(filt_ctx, filt, inst_name);
if (!*filt_ctx) {
av_log(log_ctx, AV_LOG_ERROR,
"Error creating filter '%s'\n", filt_name);
return NULL;
return ret;
if (avfilter_graph_add_filter(ctx, filt_ctx) < 0) {
return NULL;
if ((ret = avfilter_graph_add_filter(ctx, *filt_ctx)) < 0) {
return ret;
if (!strcmp(filt_name, "scale") && !strstr(args, "flags")) {
......@@ -130,13 +129,13 @@ static AVFilterContext *create_filter(AVFilterGraph *ctx, int index,
args = tmp_args;
if (avfilter_init_filter(filt_ctx, args, NULL)) {
if ((ret = avfilter_init_filter(*filt_ctx, args, NULL)) < 0) {
av_log(log_ctx, AV_LOG_ERROR,
"Error initializing filter '%s' with args '%s'\n", filt_name, args);
return NULL;
return ret;
return filt_ctx;
return 0;
......@@ -147,17 +146,18 @@ static AVFilterContext *parse_filter(const char **buf, AVFilterGraph *graph,
char *opts = NULL;
char *name = av_get_token(buf, "=,;[\n");
AVFilterContext *ret;
AVFilterContext *filt_ctx;
int ret;
if (**buf == '=') {
opts = av_get_token(buf, "[],;\n");
ret = create_filter(graph, index, name, opts, log_ctx);
ret = create_filter(&filt_ctx, graph, index, name, opts, log_ctx);
return ret;
return filt_ctx;
static void free_inout(AVFilterInOut *head)
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