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swscale: make filterPos 32bit.

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Fixes overflows for large image sizes.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
This commit is contained in:
Ronald S. Bultje 2012-03-05 12:26:42 -08:00
parent 018f39ef49
commit 2254b559cb
7 changed files with 41 additions and 38 deletions
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2
libswscale/ppc/swscale_altivec.c
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@ -144,7 +144,7 @@ static void yuv2planeX_altivec(const int16_t *filter, int filterSize,
static void hScale_altivec_real(SwsContext *c, int16_t *dst, int dstW,
const uint8_t *src, const int16_t *filter,
const int16_t *filterPos, int filterSize)
const int32_t *filterPos, int filterSize)
{
register int i;
DECLARE_ALIGNED(16, int, tempo)[4];

20
libswscale/swscale.c
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@ -61,7 +61,7 @@ static av_always_inline void fillPlane(uint8_t* plane, int stride,
static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t *_src,
const int16_t *filter,
const int16_t *filterPos, int filterSize)
const int32_t *filterPos, int filterSize)
{
int i;
int32_t *dst = (int32_t *) _dst;
@ -84,7 +84,7 @@ static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t
static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t *_src,
const int16_t *filter,
const int16_t *filterPos, int filterSize)
const int32_t *filterPos, int filterSize)
{
int i;
const uint16_t *src = (const uint16_t *) _src;
@ -105,7 +105,7 @@ static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t
// bilinear / bicubic scaling
static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t *src,
const int16_t *filter, const int16_t *filterPos,
const int16_t *filter, const int32_t *filterPos,
int filterSize)
{
int i;
@ -123,7 +123,7 @@ static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t *
}
static void hScale8To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t *src,
const int16_t *filter, const int16_t *filterPos,
const int16_t *filter, const int32_t *filterPos,
int filterSize)
{
int i;
@ -224,7 +224,7 @@ static void hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth,
static av_always_inline void hyscale(SwsContext *c, int16_t *dst, int dstWidth,
const uint8_t *src_in[4], int srcW, int xInc,
const int16_t *hLumFilter,
const int16_t *hLumFilterPos, int hLumFilterSize,
const int32_t *hLumFilterPos, int hLumFilterSize,
uint8_t *formatConvBuffer,
uint32_t *pal, int isAlpha)
{
@ -268,7 +268,7 @@ static void hcscale_fast_c(SwsContext *c, int16_t *dst1, int16_t *dst2,
static av_always_inline void hcscale(SwsContext *c, int16_t *dst1, int16_t *dst2, int dstWidth,
const uint8_t *src_in[4],
int srcW, int xInc, const int16_t *hChrFilter,
const int16_t *hChrFilterPos, int hChrFilterSize,
const int32_t *hChrFilterPos, int hChrFilterSize,
uint8_t *formatConvBuffer, uint32_t *pal)
{
const uint8_t *src1 = src_in[1], *src2 = src_in[2];
@ -312,10 +312,10 @@ static int swScale(SwsContext *c, const uint8_t* src[],
const int chrXInc= c->chrXInc;
const enum PixelFormat dstFormat= c->dstFormat;
const int flags= c->flags;
int16_t *vLumFilterPos= c->vLumFilterPos;
int16_t *vChrFilterPos= c->vChrFilterPos;
int16_t *hLumFilterPos= c->hLumFilterPos;
int16_t *hChrFilterPos= c->hChrFilterPos;
int32_t *vLumFilterPos= c->vLumFilterPos;
int32_t *vChrFilterPos= c->vChrFilterPos;
int32_t *hLumFilterPos= c->hLumFilterPos;
int32_t *hChrFilterPos= c->hChrFilterPos;
int16_t *vLumFilter= c->vLumFilter;
int16_t *vChrFilter= c->vChrFilter;
int16_t *hLumFilter= c->hLumFilter;

12
libswscale/swscale_internal.h
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@ -295,10 +295,10 @@ typedef struct SwsContext {
int16_t *hChrFilter; ///< Array of horizontal filter coefficients for chroma planes.
int16_t *vLumFilter; ///< Array of vertical filter coefficients for luma/alpha planes.
int16_t *vChrFilter; ///< Array of vertical filter coefficients for chroma planes.
int16_t *hLumFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
int16_t *hChrFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for chroma planes.
int16_t *vLumFilterPos; ///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
int16_t *vChrFilterPos; ///< Array of vertical filter starting positions for each dst[i] for chroma planes.
int32_t *hLumFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
int32_t *hChrFilterPos; ///< Array of horizontal filter starting positions for each dst[i] for chroma planes.
int32_t *vLumFilterPos; ///< Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
int32_t *vChrFilterPos; ///< Array of vertical filter starting positions for each dst[i] for chroma planes.
int hLumFilterSize; ///< Horizontal filter size for luma/alpha pixels.
int hChrFilterSize; ///< Horizontal filter size for chroma pixels.
int vLumFilterSize; ///< Vertical filter size for luma/alpha pixels.
@ -508,10 +508,10 @@ typedef struct SwsContext {
/** @{ */
void (*hyScale)(struct SwsContext *c, int16_t *dst, int dstW,
const uint8_t *src, const int16_t *filter,
const int16_t *filterPos, int filterSize);
const int32_t *filterPos, int filterSize);
void (*hcScale)(struct SwsContext *c, int16_t *dst, int dstW,
const uint8_t *src, const int16_t *filter,
const int16_t *filterPos, int filterSize);
const int32_t *filterPos, int filterSize);
/** @} */
/// Color range conversion function for luma plane if needed.

4
libswscale/utils.c
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@ -180,7 +180,7 @@ static double getSplineCoeff(double a, double b, double c, double d, double dist
dist-1.0);
}
static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
static int initFilter(int16_t **outFilter, int32_t **filterPos, int *outFilterSize, int xInc,
int srcW, int dstW, int filterAlign, int one, int flags, int cpu_flags,
SwsVector *srcFilter, SwsVector *dstFilter, double param[2], int is_horizontal)
{
@ -196,7 +196,7 @@ static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSi
emms_c(); //FIXME this should not be required but it IS (even for non-MMX versions)
// NOTE: the +3 is for the MMX(+1)/SSE(+3) scaler which reads over the end
FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+3)*sizeof(int16_t), fail);
FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+3)*sizeof(**filterPos), fail);
if (FFABS(xInc - 0x10000) <10) { // unscaled
int i;

31
libswscale/x86/scale.asm
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@ -38,7 +38,7 @@ SECTION .text
; (SwsContext *c, int{16,32}_t *dst,
; int dstW, const uint{8,16}_t *src,
; const int16_t *filter,
; const int16_t *filterPos, int filterSize);
; const int32_t *filterPos, int filterSize);
;
; Scale one horizontal line. Input is either 8-bits width or 16-bits width
; ($source_width can be either 8, 9, 10 or 16, difference is whether we have to
@ -53,6 +53,9 @@ SECTION .text
cglobal hscale%1to%2_%4_%5, %6, 7, %7
%if ARCH_X86_64
movsxd r2, r2d
%define mov32 movsxd
%else ; x86-32
%define mov32 mov
%endif ; x86-64
%if %2 == 19
%if mmsize == 8 ; mmx
@ -95,14 +98,14 @@ cglobal hscale%1to%2_%4_%5, %6, 7, %7
%else ; %2 == 19
lea r1, [r1+r2*(4>>r2shr)]
%endif ; %2 == 15/19
lea r5, [r5+r2*(2>>r2shr)]
lea r5, [r5+r2*(4>>r2shr)]
neg r2
.loop:
%if %3 == 4 ; filterSize == 4 scaling
; load 2x4 or 4x4 source pixels into m0/m1
movsx r0, word [r5+r2*2+0] ; filterPos[0]
movsx r6, word [r5+r2*2+2] ; filterPos[1]
mov32 r0, dword [r5+r2*4+0] ; filterPos[0]
mov32 r6, dword [r5+r2*4+4] ; filterPos[1]
movlh m0, [r3+r0*srcmul] ; src[filterPos[0] + {0,1,2,3}]
%if mmsize == 8
movlh m1, [r3+r6*srcmul] ; src[filterPos[1] + {0,1,2,3}]
@ -112,8 +115,8 @@ cglobal hscale%1to%2_%4_%5, %6, 7, %7
%else ; %1 == 8
movd m4, [r3+r6*srcmul] ; src[filterPos[1] + {0,1,2,3}]
%endif
movsx r0, word [r5+r2*2+4] ; filterPos[2]
movsx r6, word [r5+r2*2+6] ; filterPos[3]
mov32 r0, dword [r5+r2*4+8] ; filterPos[2]
mov32 r6, dword [r5+r2*4+12] ; filterPos[3]
movlh m1, [r3+r0*srcmul] ; src[filterPos[2] + {0,1,2,3}]
%if %1 > 8
movhps m1, [r3+r6*srcmul] ; src[filterPos[3] + {0,1,2,3}]
@ -156,8 +159,8 @@ cglobal hscale%1to%2_%4_%5, %6, 7, %7
%endif ; mmx/sse2/ssse3/sse4
%else ; %3 == 8, i.e. filterSize == 8 scaling
; load 2x8 or 4x8 source pixels into m0, m1, m4 and m5
movsx r0, word [r5+r2*1+0] ; filterPos[0]
movsx r6, word [r5+r2*1+2] ; filterPos[1]
mov32 r0, dword [r5+r2*2+0] ; filterPos[0]
mov32 r6, dword [r5+r2*2+4] ; filterPos[1]
movbh m0, [r3+ r0 *srcmul] ; src[filterPos[0] + {0,1,2,3,4,5,6,7}]
%if mmsize == 8
movbh m1, [r3+(r0+4)*srcmul] ; src[filterPos[0] + {4,5,6,7}]
@ -165,8 +168,8 @@ cglobal hscale%1to%2_%4_%5, %6, 7, %7
movbh m5, [r3+(r6+4)*srcmul] ; src[filterPos[1] + {4,5,6,7}]
%else ; mmsize == 16
movbh m1, [r3+ r6 *srcmul] ; src[filterPos[1] + {0,1,2,3,4,5,6,7}]
movsx r0, word [r5+r2*1+4] ; filterPos[2]
movsx r6, word [r5+r2*1+6] ; filterPos[3]
mov32 r0, dword [r5+r2*2+8] ; filterPos[2]
mov32 r6, dword [r5+r2*2+12] ; filterPos[3]
movbh m4, [r3+ r0 *srcmul] ; src[filterPos[2] + {0,1,2,3,4,5,6,7}]
movbh m5, [r3+ r6 *srcmul] ; src[filterPos[3] + {0,1,2,3,4,5,6,7}]
%endif ; mmsize == 8/16
@ -251,7 +254,7 @@ cglobal hscale%1to%2_%4_%5, %6, 7, %7
%define r1x r1
%define filter2 r6m
%endif ; x86-32/64
lea r5, [r5+r2*2]
lea r5, [r5+r2*4]
%if %2 == 15
lea r1, [r1+r2*2]
%else ; %2 == 19
@ -261,8 +264,8 @@ cglobal hscale%1to%2_%4_%5, %6, 7, %7
neg r2
.loop:
movsx r0, word [r5+r2*2+0] ; filterPos[0]
movsx r1x, word [r5+r2*2+2] ; filterPos[1]
mov32 r0, dword [r5+r2*4+0] ; filterPos[0]
mov32 r1x, dword [r5+r2*4+4] ; filterPos[1]
; FIXME maybe do 4px/iteration on x86-64 (x86-32 wouldn't have enough regs)?
pxor m4, m4
pxor m5, m5
@ -293,7 +296,7 @@ cglobal hscale%1to%2_%4_%5, %6, 7, %7
jl .innerloop
%ifidn %4, X4
movsx r1x, word [r5+r2*2+2] ; filterPos[1]
mov32 r1x, dword [r5+r2*4+4] ; filterPos[1]
movlh m0, [src_reg+r0 *srcmul] ; split last 4 srcpx of dstpx[0]
sub r1x, r6 ; and first 4 srcpx of dstpx[1]
%if %1 > 8

6
libswscale/x86/swscale_mmx.c
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@ -93,8 +93,8 @@ void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufI
int16_t **alpPixBuf= c->alpPixBuf;
const int vLumBufSize= c->vLumBufSize;
const int vChrBufSize= c->vChrBufSize;
int16_t *vLumFilterPos= c->vLumFilterPos;
int16_t *vChrFilterPos= c->vChrFilterPos;
int32_t *vLumFilterPos= c->vLumFilterPos;
int32_t *vChrFilterPos= c->vChrFilterPos;
int16_t *vLumFilter= c->vLumFilter;
int16_t *vChrFilter= c->vChrFilter;
int32_t *lumMmxFilter= c->lumMmxFilter;
@ -204,7 +204,7 @@ extern void ff_hscale ## from_bpc ## to ## to_bpc ## _ ## filter_n ## _ ## opt(
SwsContext *c, int16_t *data, \
int dstW, const uint8_t *src, \
const int16_t *filter, \
const int16_t *filterPos, int filterSize)
const int32_t *filterPos, int filterSize)
#define SCALE_FUNCS(filter_n, opt) \
SCALE_FUNC(filter_n, 8, 15, opt); \

4
libswscale/x86/swscale_template.c
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@ -1376,7 +1376,7 @@ static void RENAME(hyscale_fast)(SwsContext *c, int16_t *dst,
int dstWidth, const uint8_t *src,
int srcW, int xInc)
{
int16_t *filterPos = c->hLumFilterPos;
int32_t *filterPos = c->hLumFilterPos;
int16_t *filter = c->hLumFilter;
void *mmx2FilterCode= c->lumMmx2FilterCode;
int i;
@ -1472,7 +1472,7 @@ static void RENAME(hcscale_fast)(SwsContext *c, int16_t *dst1, int16_t *dst2,
int dstWidth, const uint8_t *src1,
const uint8_t *src2, int srcW, int xInc)
{
int16_t *filterPos = c->hChrFilterPos;
int32_t *filterPos = c->hChrFilterPos;
int16_t *filter = c->hChrFilter;
void *mmx2FilterCode= c->chrMmx2FilterCode;
int i;