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timefilter: Handle memory allocation failure

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Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
This commit is contained in:
Derek Buitenhuis 2013-10-22 18:46:37 +01:00
parent fc7be7ddf3
commit 6ef30976e0
4 changed files with 16 additions and 0 deletions
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4
libavdevice/jack_audio.c
View File

@ -188,6 +188,10 @@ static int start_jack(AVFormatContext *context)
/* Create time filter */
self->timefilter = ff_timefilter_new (1.0 / self->sample_rate, self->buffer_size, 1.5);
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));

8
libavdevice/timefilter.c
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@ -49,6 +49,10 @@ TimeFilter *ff_timefilter_new(double time_base,
{
TimeFilter *self = av_mallocz(sizeof(TimeFilter));
double o = 2 * M_PI * bandwidth * period * time_base;
if (!self)
return NULL;
self->clock_period = time_base;
self->feedback2_factor = qexpneg(M_SQRT2 * o);
self->feedback3_factor = qexpneg(o * o) / period;
@ -121,6 +125,10 @@ 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 alocate memory for timefilter.\n");
exit(1);
}
for (i = 0; i < SAMPLES; i++) {
double filtered;
filtered = ff_timefilter_update(tf, samples[i], i ? (samplet[i] - samplet[i-1]) : 1);

2
libavdevice/timefilter.h
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@ -58,6 +58,8 @@ typedef struct TimeFilter TimeFilter;
* @param period expected update interval, in input units
* @param brandwidth filtering bandwidth, in Hz
*
* @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
*/

2
libavdevice/v4l2.c
View File

@ -455,6 +455,8 @@ static int init_convert_timestamp(AVFormatContext *ctx, int64_t ts)
av_log(ctx, AV_LOG_INFO, "Detected monotonic timestamps, converting\n");
/* microseconds instead of seconds, MHz instead of Hz */
s->timefilter = ff_timefilter_new(1, period, 1.0E-6);
if (!s->timefilter)
return AVERROR(ENOMEM);
s->ts_mode = V4L_TS_CONVERT_READY;
return 0;
}