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doc/examples/filtering_video: add some error handling in init_filters()

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This commit is contained in:
Stefano Sabatini 2013-12-02 14:25:45 +01:00
parent a12bf9f50f
commit 3aa6018010
1 changed files with 15 additions and 6 deletions
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19
doc/examples/filtering_video.c
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@ -85,7 +85,7 @@ static int open_input_file(const char *filename)
static int init_filters(const char *filters_descr) static int init_filters(const char *filters_descr)
{ {
char args[512]; char args[512];
int ret; int ret = 0;
AVFilter *buffersrc = avfilter_get_by_name("buffer"); AVFilter *buffersrc = avfilter_get_by_name("buffer");
AVFilter *buffersink = avfilter_get_by_name("buffersink"); AVFilter *buffersink = avfilter_get_by_name("buffersink");
AVFilterInOut *outputs = avfilter_inout_alloc(); AVFilterInOut *outputs = avfilter_inout_alloc();
@ -94,6 +94,10 @@ static int init_filters(const char *filters_descr)
AVBufferSinkParams *buffersink_params; AVBufferSinkParams *buffersink_params;
filter_graph = avfilter_graph_alloc(); filter_graph = avfilter_graph_alloc();
if (!outputs || !inputs || !filter_graph) {
ret = AVERROR(ENOMEM);
goto end;
}
/* buffer video source: the decoded frames from the decoder will be inserted here. */ /* buffer video source: the decoded frames from the decoder will be inserted here. */
snprintf(args, sizeof(args), snprintf(args, sizeof(args),
@ -106,7 +110,7 @@ static int init_filters(const char *filters_descr)
args, NULL, filter_graph); args, NULL, filter_graph);
if (ret < 0) { if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot create buffer source\n"); av_log(NULL, AV_LOG_ERROR, "Cannot create buffer source\n");
return ret; goto end;
} }
/* buffer video sink: to terminate the filter chain. */ /* buffer video sink: to terminate the filter chain. */
@ -117,7 +121,7 @@ static int init_filters(const char *filters_descr)
av_free(buffersink_params); av_free(buffersink_params);
if (ret < 0) { if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot create buffer sink\n"); av_log(NULL, AV_LOG_ERROR, "Cannot create buffer sink\n");
return ret; goto end;
} }
/* Endpoints for the filter graph. */ /* Endpoints for the filter graph. */
@ -133,11 +137,16 @@ static int init_filters(const char *filters_descr)
if ((ret = avfilter_graph_parse_ptr(filter_graph, filters_descr, if ((ret = avfilter_graph_parse_ptr(filter_graph, filters_descr,
&inputs, &outputs, NULL)) < 0) &inputs, &outputs, NULL)) < 0)
return ret; goto end;
if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0) if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0)
goto end;
end:
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
return ret; return ret;
return 0;
} }
static void display_frame(const AVFrame *frame, AVRational time_base) static void display_frame(const AVFrame *frame, AVRational time_base)