diff options
author | Clément Bœsch <u@pkh.me> | 2014-11-13 23:20:52 +0300 |
---|---|---|
committer | Clément Bœsch <u@pkh.me> | 2014-11-15 22:31:41 +0300 |
commit | e0704840404381c7b976a35db4004deca4495a22 (patch) | |
tree | e40e89c33d97137219c91a2f16d9e500eee7018e /libavfilter | |
parent | 55f05ac0f1bf728cdee5ca70d1c10a08b025844d (diff) |
avfilter/xbr: simplify width overread checks
Diffstat (limited to 'libavfilter')
-rw-r--r-- | libavfilter/vf_xbr.c | 199 |
1 files changed, 39 insertions, 160 deletions
diff --git a/libavfilter/vf_xbr.c b/libavfilter/vf_xbr.c index 79ccf0edee..26f849994f 100644 --- a/libavfilter/vf_xbr.c +++ b/libavfilter/vf_xbr.c @@ -136,10 +136,6 @@ static void xbr2x(AVFrame * input, AVFrame * output, const uint32_t * r2y) int next_line = output->linesize[0]>>2; for (y = 0; y < input->height; y++) { - - uint32_t pprev; - uint32_t pprev2; - uint32_t * E = (uint32_t *)(output->data[0] + y * output->linesize[0] * 2); /* middle. Offset of -8 is given */ @@ -167,8 +163,6 @@ static void xbr2x(AVFrame * input, AVFrame * output, const uint32_t * r2y) } } - pprev = pprev2 = 2; - for (x = 0; x < input->width; x++) { uint32_t B1 = sa0[2]; uint32_t PB = sa1[2]; @@ -176,59 +170,29 @@ static void xbr2x(AVFrame * input, AVFrame * output, const uint32_t * r2y) uint32_t PH = sa3[2]; uint32_t H5 = sa4[2]; + const int pprev = 2 - (x > 0); uint32_t A1 = sa0[pprev]; uint32_t PA = sa1[pprev]; uint32_t PD = sa2[pprev]; uint32_t PG = sa3[pprev]; uint32_t G5 = sa4[pprev]; + const int pprev2 = pprev - (x > 1); uint32_t A0 = sa1[pprev2]; uint32_t D0 = sa2[pprev2]; uint32_t G0 = sa3[pprev2]; - uint32_t C1 = 0; - uint32_t PC = 0; - uint32_t PF = 0; - uint32_t PI = 0; - uint32_t I5 = 0; - - uint32_t C4 = 0; - uint32_t F4 = 0; - uint32_t I4 = 0; - - if (x >= input->width - 2) { - if (x == input->width - 1) { - C1 = sa0[2]; - PC = sa1[2]; - PF = sa2[2]; - PI = sa3[2]; - I5 = sa4[2]; - - C4 = sa1[2]; - F4 = sa2[2]; - I4 = sa3[2]; - } else { - C1 = sa0[3]; - PC = sa1[3]; - PF = sa2[3]; - PI = sa3[3]; - I5 = sa4[3]; - - C4 = sa1[3]; - F4 = sa2[3]; - I4 = sa3[3]; - } - } else { - C1 = sa0[3]; - PC = sa1[3]; - PF = sa2[3]; - PI = sa3[3]; - I5 = sa4[3]; - - C4 = sa1[4]; - F4 = sa2[4]; - I4 = sa3[4]; - } + const int pnext = 3 - (x == input->width - 1); + uint32_t C1 = sa0[pnext]; + uint32_t PC = sa1[pnext]; + uint32_t PF = sa2[pnext]; + uint32_t PI = sa3[pnext]; + uint32_t I5 = sa4[pnext]; + + const int pnext2 = pnext + 1 - (x >= input->width - 2); + uint32_t C4 = sa1[pnext2]; + uint32_t F4 = sa2[pnext2]; + uint32_t I4 = sa3[pnext2]; E[0] = E[1] = E[next_line] = E[next_line + 1] = PE; // 0, 1, 2, 3 @@ -244,11 +208,6 @@ static void xbr2x(AVFrame * input, AVFrame * output, const uint32_t * r2y) sa4 += 1; E += 2; - - if (pprev2){ - pprev2--; - pprev = 1; - } } } } @@ -299,9 +258,6 @@ static void xbr3x(AVFrame *input, AVFrame *output, const uint32_t *r2y) { const int nl = output->linesize[0]>>2; const int nl1 = nl + nl; - uint32_t pprev; - uint32_t pprev2; - int x,y; for (y = 0; y < input->height; y++) { @@ -333,8 +289,6 @@ static void xbr3x(AVFrame *input, AVFrame *output, const uint32_t *r2y) } } - pprev = pprev2 = 2; - for (x = 0; x < input->width; x++){ uint32_t B1 = sa0[2]; uint32_t PB = sa1[2]; @@ -342,59 +296,29 @@ static void xbr3x(AVFrame *input, AVFrame *output, const uint32_t *r2y) uint32_t PH = sa3[2]; uint32_t H5 = sa4[2]; + const int pprev = 2 - (x > 0); uint32_t A1 = sa0[pprev]; uint32_t PA = sa1[pprev]; uint32_t PD = sa2[pprev]; uint32_t PG = sa3[pprev]; uint32_t G5 = sa4[pprev]; + const int pprev2 = pprev - (x > 1); uint32_t A0 = sa1[pprev2]; uint32_t D0 = sa2[pprev2]; uint32_t G0 = sa3[pprev2]; - uint32_t C1 = 0; - uint32_t PC = 0; - uint32_t PF = 0; - uint32_t PI = 0; - uint32_t I5 = 0; - - uint32_t C4 = 0; - uint32_t F4 = 0; - uint32_t I4 = 0; - - if (x >= input->width - 2){ - if (x == input->width - 1){ - C1 = sa0[2]; - PC = sa1[2]; - PF = sa2[2]; - PI = sa3[2]; - I5 = sa4[2]; - - C4 = sa1[2]; - F4 = sa2[2]; - I4 = sa3[2]; - } else { - C1 = sa0[3]; - PC = sa1[3]; - PF = sa2[3]; - PI = sa3[3]; - I5 = sa4[3]; - - C4 = sa1[3]; - F4 = sa2[3]; - I4 = sa3[3]; - } - } else { - C1 = sa0[3]; - PC = sa1[3]; - PF = sa2[3]; - PI = sa3[3]; - I5 = sa4[3]; - - C4 = sa1[4]; - F4 = sa2[4]; - I4 = sa3[4]; - } + const int pnext = 3 - (x == input->width - 1); + uint32_t C1 = sa0[pnext]; + uint32_t PC = sa1[pnext]; + uint32_t PF = sa2[pnext]; + uint32_t PI = sa3[pnext]; + uint32_t I5 = sa4[pnext]; + + const int pnext2 = pnext + 1 - (x >= input->width - 2); + uint32_t C4 = sa1[pnext2]; + uint32_t F4 = sa2[pnext2]; + uint32_t I4 = sa3[pnext2]; E[0] = E[1] = E[2] = PE; E[nl] = E[nl+1] = E[nl+2] = PE; // 3, 4, 5 @@ -412,11 +336,6 @@ static void xbr3x(AVFrame *input, AVFrame *output, const uint32_t *r2y) sa4 += 1; E += 3; - - if (pprev2){ - pprev2--; - pprev = 1; - } } } } @@ -473,9 +392,6 @@ static void xbr4x(AVFrame *input, AVFrame *output, const uint32_t *r2y) const int nl = output->linesize[0]>>2; const int nl1 = nl + nl; const int nl2 = nl1 + nl; - uint32_t pprev; - uint32_t pprev2; - int x, y; for (y = 0; y < input->height; y++) { @@ -507,8 +423,6 @@ static void xbr4x(AVFrame *input, AVFrame *output, const uint32_t *r2y) } } - pprev = pprev2 = 2; - for (x = 0; x < input->width; x++) { uint32_t B1 = sa0[2]; uint32_t PB = sa1[2]; @@ -516,59 +430,29 @@ static void xbr4x(AVFrame *input, AVFrame *output, const uint32_t *r2y) uint32_t PH = sa3[2]; uint32_t H5 = sa4[2]; + const int pprev = 2 - (x > 0); uint32_t A1 = sa0[pprev]; uint32_t PA = sa1[pprev]; uint32_t PD = sa2[pprev]; uint32_t PG = sa3[pprev]; uint32_t G5 = sa4[pprev]; + const int pprev2 = pprev - (x > 1); uint32_t A0 = sa1[pprev2]; uint32_t D0 = sa2[pprev2]; uint32_t G0 = sa3[pprev2]; - uint32_t C1 = 0; - uint32_t PC = 0; - uint32_t PF = 0; - uint32_t PI = 0; - uint32_t I5 = 0; - - uint32_t C4 = 0; - uint32_t F4 = 0; - uint32_t I4 = 0; - - if (x >= input->width - 2) { - if (x == input->width - 1) { - C1 = sa0[2]; - PC = sa1[2]; - PF = sa2[2]; - PI = sa3[2]; - I5 = sa4[2]; - - C4 = sa1[2]; - F4 = sa2[2]; - I4 = sa3[2]; - } else { - C1 = sa0[3]; - PC = sa1[3]; - PF = sa2[3]; - PI = sa3[3]; - I5 = sa4[3]; - - C4 = sa1[3]; - F4 = sa2[3]; - I4 = sa3[3]; - } - } else { - C1 = sa0[3]; - PC = sa1[3]; - PF = sa2[3]; - PI = sa3[3]; - I5 = sa4[3]; - - C4 = sa1[4]; - F4 = sa2[4]; - I4 = sa3[4]; - } + const int pnext = 3 - (x == input->width - 1); + uint32_t C1 = sa0[pnext]; + uint32_t PC = sa1[pnext]; + uint32_t PF = sa2[pnext]; + uint32_t PI = sa3[pnext]; + uint32_t I5 = sa4[pnext]; + + const int pnext2 = pnext + 1 - (x >= input->width - 2); + uint32_t C4 = sa1[pnext2]; + uint32_t F4 = sa2[pnext2]; + uint32_t I4 = sa3[pnext2]; E[0] = E[1] = E[2] = E[3] = PE; E[nl] = E[nl+1] = E[nl+2] = E[nl+3] = PE; // 4, 5, 6, 7 @@ -587,11 +471,6 @@ static void xbr4x(AVFrame *input, AVFrame *output, const uint32_t *r2y) sa4 += 1; E += 4; - - if (pprev2){ - pprev2--; - pprev = 1; - } } } } |