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swscale/internal: constify and expose ff_swscale() 

Used as an intermediate entry point for the new swscale context. The extra
constification is a consistency measure, as I want to move the memcpy of
stride and plane pointers to the functions that actually need to mutate them.

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Niklas Haas <git@haasn.dev>
This commit is contained in:
Niklas Haas 2024-09-26 17:06:26 +02:00
parent 403a20b2e6
commit ec9985b54f
3 changed files with 38 additions and 23 deletions
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3
libswscale/slice.c
View File

@ -145,7 +145,8 @@ int ff_rotate_slice(SwsSlice *s, int lum, int chr)
return 0;
}
int ff_init_slice_from_src(SwsSlice * s, uint8_t *src[4], int stride[4], int srcW, int lumY, int lumH, int chrY, int chrH, int relative)
int ff_init_slice_from_src(SwsSlice * s, uint8_t *const src[4], const int stride[4],
int srcW, int lumY, int lumH, int chrY, int chrH, int relative)
{
int i = 0;

50
libswscale/swscale.c
View File

@ -233,10 +233,9 @@ static void lumRangeFromJpeg16_c(int16_t *_dst, int width)
if (DEBUG_SWSCALE_BUFFERS) \
av_log(c, AV_LOG_DEBUG, __VA_ARGS__)
static int swscale(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[],
int dstSliceY, int dstSliceH)
int ff_swscale(SwsContext *c, const uint8_t *const src[], const int srcStride[],
int srcSliceY, int srcSliceH, uint8_t *const dst[],
const int dstStride[], int dstSliceY, int dstSliceH)
{
const int scale_dst = dstSliceY > 0 || dstSliceH < c->dstH;
@ -287,20 +286,29 @@ static int swscale(SwsContext *c, const uint8_t *src[],
int hasLumHoles = 1;
int hasChrHoles = 1;
const uint8_t *src2[4];
int srcStride2[4];
if (isPacked(c->srcFormat)) {
src[1] =
src[2] =
src[3] = src[0];
srcStride[1] =
srcStride[2] =
srcStride[3] = srcStride[0];
src2[0] =
src2[1] =
src2[2] =
src2[3] = src[0];
srcStride2[0] =
srcStride2[1] =
srcStride2[2] =
srcStride2[3] = srcStride[0];
} else {
memcpy(src2, src, sizeof(src2));
memcpy(srcStride2, srcStride, sizeof(srcStride2));
}
srcStride[1] *= 1 << c->vChrDrop;
srcStride[2] *= 1 << c->vChrDrop;
srcStride2[1] *= 1 << c->vChrDrop;
srcStride2[2] *= 1 << c->vChrDrop;
DEBUG_BUFFERS("swscale() %p[%d] %p[%d] %p[%d] %p[%d] -> %p[%d] %p[%d] %p[%d] %p[%d]\n",
src[0], srcStride[0], src[1], srcStride[1],
src[2], srcStride[2], src[3], srcStride[3],
src2[0], srcStride2[0], src2[1], srcStride2[1],
src2[2], srcStride2[2], src2[3], srcStride2[3],
dst[0], dstStride[0], dst[1], dstStride[1],
dst[2], dstStride[2], dst[3], dstStride[3]);
DEBUG_BUFFERS("srcSliceY: %d srcSliceH: %d dstY: %d dstH: %d\n",
@ -320,10 +328,10 @@ static int swscale(SwsContext *c, const uint8_t *src[],
}
#if ARCH_X86
if ( (uintptr_t)dst[0]&15 || (uintptr_t)dst[1]&15 || (uintptr_t)dst[2]&15
|| (uintptr_t)src[0]&15 || (uintptr_t)src[1]&15 || (uintptr_t)src[2]&15
|| dstStride[0]&15 || dstStride[1]&15 || dstStride[2]&15 || dstStride[3]&15
|| srcStride[0]&15 || srcStride[1]&15 || srcStride[2]&15 || srcStride[3]&15
if ( (uintptr_t) dst[0]&15 || (uintptr_t) dst[1]&15 || (uintptr_t) dst[2]&15
|| (uintptr_t)src2[0]&15 || (uintptr_t)src2[1]&15 || (uintptr_t)src2[2]&15
|| dstStride[0]&15 || dstStride[1]&15 || dstStride[2]&15 || dstStride[3]&15
|| srcStride2[0]&15 || srcStride2[1]&15 || srcStride2[2]&15 || srcStride2[3]&15
) {
SwsContext *const ctx = c->parent ? c->parent : c;
int cpu_flags = av_get_cpu_flags();
@ -356,7 +364,7 @@ static int swscale(SwsContext *c, const uint8_t *src[],
ff_init_vscale_pfn(c, yuv2plane1, yuv2planeX, yuv2nv12cX,
yuv2packed1, yuv2packed2, yuv2packedX, yuv2anyX, c->use_mmx_vfilter);
ff_init_slice_from_src(src_slice, (uint8_t**)src, srcStride, c->srcW,
ff_init_slice_from_src(src_slice, (uint8_t**)src2, srcStride2, c->srcW,
srcSliceY, srcSliceH, chrSrcSliceY, chrSrcSliceH, 1);
ff_init_slice_from_src(vout_slice, (uint8_t**)dst, dstStride, c->dstW,
@ -1054,8 +1062,8 @@ static int scale_internal(SwsContext *c,
if (scale_dst)
dst2[0] += dstSliceY * dstStride2[0];
} else {
ret = swscale(c, src2, srcStride2, srcSliceY_internal, srcSliceH,
dst2, dstStride2, dstSliceY, dstSliceH);
ret = ff_swscale(c, src2, srcStride2, srcSliceY_internal, srcSliceH,
dst2, dstStride2, dstSliceY, dstSliceH);
}
if (c->dstXYZ && !(c->srcXYZ && c->srcW==c->dstW && c->srcH==c->dstH)) {

8
libswscale/swscale_internal.h
View File

@ -1121,7 +1121,8 @@ typedef struct SwsFilterDescriptor
// warp input lines in the form (src + width*i + j) to slice format (line[i][j])
// relative=true means first line src[x][0] otherwise first line is src[x][lum/crh Y]
int ff_init_slice_from_src(SwsSlice * s, uint8_t *src[4], int stride[4], int srcW, int lumY, int lumH, int chrY, int chrH, int relative);
int ff_init_slice_from_src(SwsSlice * s, uint8_t *const src[4], const int stride[4],
int srcW, int lumY, int lumH, int chrY, int chrH, int relative);
// Initialize scaler filter descriptor chain
int ff_init_filters(SwsContext *c);
@ -1165,6 +1166,11 @@ void ff_init_vscale_pfn(SwsContext *c, yuv2planar1_fn yuv2plane1, yuv2planarX_fn
void ff_sws_slice_worker(void *priv, int jobnr, int threadnr,
int nb_jobs, int nb_threads);
int ff_swscale(SwsContext *c, const uint8_t *const src[], const int srcStride[],
int srcSliceY, int srcSliceH, uint8_t *const dst[],
const int dstStride[], int dstSliceY, int dstSliceH);
//number of extra lines to process
#define MAX_LINES_AHEAD 4