timefilter: Handle memory allocation failure

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

libavdevice/jack_audio.c

@@ -190,6 +190,10 @@ static int start_jack(AVFormatContext *context)
     period            = (double) self->buffer_size / self->sample_rate;
     o                 = 2 * M_PI * 1.5 * period; /// bandwidth: 1.5Hz
     self->timefilter  = ff_timefilter_new (1.0 / self->sample_rate, sqrt(2 * o), o * o);
+    if (!self->timefilter) {
+        jack_client_close(self->client);
+        return AVERROR(ENOMEM);
+    }
 
     /* Create FIFO buffers */
     self->filled_pkts = av_fifo_alloc(FIFO_PACKETS_NUM * sizeof(AVPacket));

libavdevice/timefilter.c

@@ -41,7 +41,11 @@ TimeFilter *ff_timefilter_new(double clock_period,
                               double feedback2_factor,
                               double feedback3_factor)
 {
-    TimeFilter *self       = av_mallocz(sizeof(TimeFilter));
+    TimeFilter *self = av_mallocz(sizeof(TimeFilter));
+
+    if (!self)
+        return NULL;
+
     self->clock_period     = clock_period;
     self->feedback2_factor = feedback2_factor;
     self->feedback3_factor = feedback3_factor;
@@ -105,6 +109,10 @@ int main(void)
                     for (par1 = bestpar1 * 0.8; par1 <= bestpar1 * 1.21; par1 += bestpar1 * 0.05) {
                         double error   = 0;
                         TimeFilter *tf = ff_timefilter_new(1, par0, par1);
+                        if (!tf) {
+                            printf("Could not allocate memory for timefilter.\n");
+                            exit(1);
+                        }
                         for (i = 0; i < SAMPLES; i++) {
                             double filtered;
                             filtered = ff_timefilter_update(tf, samples[i], 1);

libavdevice/timefilter.h

@@ -56,6 +56,8 @@ typedef struct TimeFilter TimeFilter;
  * @param clock_period period of the hardware clock in seconds
  *        (for example 1.0/44100)
  *
+ * @return a pointer to a TimeFilter struct, or NULL on error
+ *
  * For more details about these parameters and background concepts please see:
  * http://www.kokkinizita.net/papers/usingdll.pdf
  */