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authorDiego Biurrun <diego@biurrun.de>2016-04-20 11:40:40 +0200
committerDiego Biurrun <diego@biurrun.de>2016-05-13 14:55:56 +0200
commita6a750c7ef240b72ce01e9653343a0ddf247d196 (patch)
tree5c472bb92b5264f19b9270b0caf8a8565b071cef /libavcodec/tests/iirfilter.c
parent257f00ec1ab06a2a161f535036c6512f3fc8e801 (diff)
downloadffmpeg-streaming-a6a750c7ef240b72ce01e9653343a0ddf247d196.zip
ffmpeg-streaming-a6a750c7ef240b72ce01e9653343a0ddf247d196.tar.gz
tests: Move all test programs to a subdirectory
Diffstat (limited to 'libavcodec/tests/iirfilter.c')
-rw-r--r--libavcodec/tests/iirfilter.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/libavcodec/tests/iirfilter.c b/libavcodec/tests/iirfilter.c
new file mode 100644
index 0000000..a6001a3
--- /dev/null
+++ b/libavcodec/tests/iirfilter.c
@@ -0,0 +1,54 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <math.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "libavutil/libm.h"
+
+#include "libavcodec/iirfilter.h"
+
+#define FILT_ORDER 4
+#define SIZE 1024
+
+int main(void)
+{
+ struct FFIIRFilterCoeffs *fcoeffs = NULL;
+ struct FFIIRFilterState *fstate = NULL;
+ float cutoff_coeff = 0.4;
+ int16_t x[SIZE], y[SIZE];
+ int i;
+
+ fcoeffs = ff_iir_filter_init_coeffs(NULL, FF_FILTER_TYPE_BUTTERWORTH,
+ FF_FILTER_MODE_LOWPASS, FILT_ORDER,
+ cutoff_coeff, 0.0, 0.0);
+ fstate = ff_iir_filter_init_state(FILT_ORDER);
+
+ for (i = 0; i < SIZE; i++)
+ x[i] = lrint(0.75 * INT16_MAX * sin(0.5 * M_PI * i * i / SIZE));
+
+ ff_iir_filter(fcoeffs, fstate, SIZE, x, 1, y, 1);
+
+ for (i = 0; i < SIZE; i++)
+ printf("%6d %6d\n", x[i], y[i]);
+
+ ff_iir_filter_free_coeffs(fcoeffs);
+ ff_iir_filter_free_state(fstate);
+ return 0;
+}
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