From bb8a6e03cc641035b3fd4dc7c8c77f2dc92b41d5 Mon Sep 17 00:00:00 2001 From: Janne Grunau Date: Wed, 5 Oct 2011 09:29:38 +0200 Subject: rv40: move loop filter to rv34dsp context Signed-off-by: Mans Rullgard --- libavcodec/rv40dsp.c | 161 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 161 insertions(+) (limited to 'libavcodec/rv40dsp.c') diff --git a/libavcodec/rv40dsp.c b/libavcodec/rv40dsp.c index efc049f1cb..f193b6050d 100644 --- a/libavcodec/rv40dsp.c +++ b/libavcodec/rv40dsp.c @@ -294,6 +294,164 @@ static void rv40_weight_func_ ## size (uint8_t *dst, uint8_t *src1, uint8_t *src RV40_WEIGHT_FUNC(16) RV40_WEIGHT_FUNC(8) +/** + * dither values for deblocking filter - left/top values + */ +static const uint8_t rv40_dither_l[16] = { + 0x40, 0x50, 0x20, 0x60, 0x30, 0x50, 0x40, 0x30, + 0x50, 0x40, 0x50, 0x30, 0x60, 0x20, 0x50, 0x40 +}; + +/** + * dither values for deblocking filter - right/bottom values + */ +static const uint8_t rv40_dither_r[16] = { + 0x40, 0x30, 0x60, 0x20, 0x50, 0x30, 0x30, 0x40, + 0x40, 0x40, 0x50, 0x30, 0x20, 0x60, 0x30, 0x40 +}; + +#define CLIP_SYMM(a, b) av_clip(a, -(b), b) +/** + * weaker deblocking very similar to the one described in 4.4.2 of JVT-A003r1 + */ +static inline void rv40_weak_loop_filter(uint8_t *src, const int step, + const int filter_p1, const int filter_q1, + const int alpha, const int beta, + const int lim_p0q0, + const int lim_q1, const int lim_p1, + const int diff_p1p0, const int diff_q1q0, + const int diff_p1p2, const int diff_q1q2) +{ + uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; + int t, u, diff; + + t = src[0*step] - src[-1*step]; + if(!t) + return; + u = (alpha * FFABS(t)) >> 7; + if(u > 3 - (filter_p1 && filter_q1)) + return; + + t <<= 2; + if(filter_p1 && filter_q1) + t += src[-2*step] - src[1*step]; + diff = CLIP_SYMM((t + 4) >> 3, lim_p0q0); + src[-1*step] = cm[src[-1*step] + diff]; + src[ 0*step] = cm[src[ 0*step] - diff]; + if(FFABS(diff_p1p2) <= beta && filter_p1){ + t = (diff_p1p0 + diff_p1p2 - diff) >> 1; + src[-2*step] = cm[src[-2*step] - CLIP_SYMM(t, lim_p1)]; + } + if(FFABS(diff_q1q2) <= beta && filter_q1){ + t = (diff_q1q0 + diff_q1q2 + diff) >> 1; + src[ 1*step] = cm[src[ 1*step] - CLIP_SYMM(t, lim_q1)]; + } +} + +static av_always_inline void rv40_adaptive_loop_filter(uint8_t *src, const int step, + const int stride, const int dmode, + const int lim_q1, const int lim_p1, + const int alpha, + const int beta, const int beta2, + const int chroma, const int edge) +{ + int diff_p1p0[4], diff_q1q0[4], diff_p1p2[4], diff_q1q2[4]; + int sum_p1p0 = 0, sum_q1q0 = 0, sum_p1p2 = 0, sum_q1q2 = 0; + uint8_t *ptr; + int flag_strong0 = 1, flag_strong1 = 1; + int filter_p1, filter_q1; + int i; + int lims; + + for(i = 0, ptr = src; i < 4; i++, ptr += stride){ + diff_p1p0[i] = ptr[-2*step] - ptr[-1*step]; + diff_q1q0[i] = ptr[ 1*step] - ptr[ 0*step]; + sum_p1p0 += diff_p1p0[i]; + sum_q1q0 += diff_q1q0[i]; + } + filter_p1 = FFABS(sum_p1p0) < (beta<<2); + filter_q1 = FFABS(sum_q1q0) < (beta<<2); + if(!filter_p1 && !filter_q1) + return; + + for(i = 0, ptr = src; i < 4; i++, ptr += stride){ + diff_p1p2[i] = ptr[-2*step] - ptr[-3*step]; + diff_q1q2[i] = ptr[ 1*step] - ptr[ 2*step]; + sum_p1p2 += diff_p1p2[i]; + sum_q1q2 += diff_q1q2[i]; + } + + if(edge){ + flag_strong0 = filter_p1 && (FFABS(sum_p1p2) < beta2); + flag_strong1 = filter_q1 && (FFABS(sum_q1q2) < beta2); + }else{ + flag_strong0 = flag_strong1 = 0; + } + + lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1; + if(flag_strong0 && flag_strong1){ /* strong filtering */ + for(i = 0; i < 4; i++, src += stride){ + int sflag, p0, q0, p1, q1; + int t = src[0*step] - src[-1*step]; + + if(!t) continue; + sflag = (alpha * FFABS(t)) >> 7; + if(sflag > 1) continue; + + p0 = (25*src[-3*step] + 26*src[-2*step] + + 26*src[-1*step] + + 26*src[ 0*step] + 25*src[ 1*step] + rv40_dither_l[dmode + i]) >> 7; + q0 = (25*src[-2*step] + 26*src[-1*step] + + 26*src[ 0*step] + + 26*src[ 1*step] + 25*src[ 2*step] + rv40_dither_r[dmode + i]) >> 7; + if(sflag){ + p0 = av_clip(p0, src[-1*step] - lims, src[-1*step] + lims); + q0 = av_clip(q0, src[ 0*step] - lims, src[ 0*step] + lims); + } + p1 = (25*src[-4*step] + 26*src[-3*step] + + 26*src[-2*step] + + 26*p0 + 25*src[ 0*step] + rv40_dither_l[dmode + i]) >> 7; + q1 = (25*src[-1*step] + 26*q0 + + 26*src[ 1*step] + + 26*src[ 2*step] + 25*src[ 3*step] + rv40_dither_r[dmode + i]) >> 7; + if(sflag){ + p1 = av_clip(p1, src[-2*step] - lims, src[-2*step] + lims); + q1 = av_clip(q1, src[ 1*step] - lims, src[ 1*step] + lims); + } + src[-2*step] = p1; + src[-1*step] = p0; + src[ 0*step] = q0; + src[ 1*step] = q1; + if(!chroma){ + src[-3*step] = (25*src[-1*step] + 26*src[-2*step] + 51*src[-3*step] + 26*src[-4*step] + 64) >> 7; + src[ 2*step] = (25*src[ 0*step] + 26*src[ 1*step] + 51*src[ 2*step] + 26*src[ 3*step] + 64) >> 7; + } + } + }else if(filter_p1 && filter_q1){ + for(i = 0; i < 4; i++, src += stride) + rv40_weak_loop_filter(src, step, 1, 1, alpha, beta, lims, lim_q1, lim_p1, + diff_p1p0[i], diff_q1q0[i], diff_p1p2[i], diff_q1q2[i]); + }else{ + for(i = 0; i < 4; i++, src += stride) + rv40_weak_loop_filter(src, step, filter_p1, filter_q1, + alpha, beta, lims>>1, lim_q1>>1, lim_p1>>1, + diff_p1p0[i], diff_q1q0[i], diff_p1p2[i], diff_q1q2[i]); + } +} + +static void rv40_v_loop_filter(uint8_t *src, int stride, int dmode, + int lim_q1, int lim_p1, + int alpha, int beta, int beta2, int chroma, int edge){ + rv40_adaptive_loop_filter(src, 1, stride, dmode, lim_q1, lim_p1, + alpha, beta, beta2, chroma, edge); +} +static void rv40_h_loop_filter(uint8_t *src, int stride, int dmode, + int lim_q1, int lim_p1, + int alpha, int beta, int beta2, int chroma, int edge){ + rv40_adaptive_loop_filter(src, stride, 1, dmode, lim_q1, lim_p1, + alpha, beta, beta2, chroma, edge); +} + av_cold void ff_rv40dsp_init(RV34DSPContext *c, DSPContext* dsp) { ff_rv34dsp_init(c, dsp); @@ -371,6 +529,9 @@ av_cold void ff_rv40dsp_init(RV34DSPContext *c, DSPContext* dsp) { c->rv40_weight_pixels_tab[0] = rv40_weight_func_16; c->rv40_weight_pixels_tab[1] = rv40_weight_func_8; + c->rv40_h_loop_filter = rv40_h_loop_filter; + c->rv40_v_loop_filter = rv40_v_loop_filter; + if (HAVE_MMX) ff_rv40dsp_init_x86(c, dsp); } -- cgit v1.2.3