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avfilter/af_surround: check for invalid magnitude and phase difference

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This commit is contained in:
Paul B Mahol 2019-04-24 14:36:59 +02:00
parent e1e0f94dc9
commit 2d16b83824
1 changed files with 3 additions and 0 deletions
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3
libavfilter/af_surround.c
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@ -18,6 +18,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avassert.h"
#include "libavutil/audio_fifo.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
@ -335,6 +336,8 @@ static void stereo_transform(float *x, float *y, float angle)
static void stereo_position(float a, float p, float *x, float *y)
{
av_assert2(a >= -1.f && a <= 1.f);
av_assert2(p >= 0.f && p <= M_PI);
*x = av_clipf(a+FFMAX(0, sinf(p-M_PI_2))*FFDIFFSIGN(a,0), -1, 1);
*y = av_clipf(cosf(a*M_PI_2+M_PI)*cosf(M_PI_2-p/M_PI)*M_LN10+1, -1, 1);
}