From d5b7144e1ffa9b1a48832ba5995261873cb211d7 Mon Sep 17 00:00:00 2001 From: Justin Ruggles Date: Sat, 15 Sep 2007 00:43:40 +0000 Subject: [PATCH] fix random dithering of zero-bit mantissas Originally committed as revision 10495 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/ac3dec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c index 66b498b6ca..e59b4162aa 100644 --- a/libavcodec/ac3dec.c +++ b/libavcodec/ac3dec.c @@ -518,7 +518,7 @@ static int get_transform_coeffs_ch(AC3DecodeContext *ctx, int ch_index, mant_gro tbap = bap[i]; switch (tbap) { case 0: - coeffs[i] = ((av_random(&ctx->dith_state) & 0xFFFF) * LEVEL_MINUS_3DB) / 32768.0f; + coeffs[i] = ((av_random(&ctx->dith_state) & 0xFFFF) / 65535.0f) - 0.5f; break; case 1: