avfilter/af_surround: fix possible out of array access

Paul B Mahol committed 3 years ago

Commit 34eeb461 parent 7f3e38b1 file · +2 −3Browse files

Unified · Split

libavfilter/af_surround.c+2−3

@@ -388,13 +388,12 @@ static inline void get_lfe(int output_lfe, int n, float lowcut, float highcut, · 387 unmodified lines
388	388	dst[2 * n ] = mag * cosf(ph); \
389	389	dst[2 * n + 1] = mag * sinf(ph);
390	390
391		−
392	391	static void calculate_factors(AVFilterContext *ctx, int ch, int chan)
393	392	{
394	393	AudioSurroundContext *s = ctx->priv;
395	394	float factor = (float )s->factors->extended_data[ch];
396		− const float f_x = s->f_x[sc_map[chan]];
397		− const float f_y = s->f_y[sc_map[chan]];
	395	+ const float f_x = s->f_x[sc_map[chan >= 0 ? chan : 0]];
	396	+ const float f_y = s->f_y[sc_map[chan >= 0 ? chan : 0]];
398	397	const int rdft_size = s->rdft_size;
399	398	const float *x = s->x_pos;
400	399	const float *y = s->y_pos;