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FFmpeg/libswscale/slice.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

406 lines
12 KiB
C

/*
* Copyright (C) 2015 Pedro Arthur <bygrandao@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/mem.h"
#include "swscale_internal.h"
static void free_lines(SwsSlice *s)
{
int i;
for (i = 0; i < 2; ++i) {
int n = s->plane[i].available_lines;
int j;
for (j = 0; j < n; ++j) {
av_freep(&s->plane[i].line[j]);
if (s->is_ring)
s->plane[i].line[j+n] = NULL;
}
}
for (i = 0; i < 4; ++i)
memset(s->plane[i].line, 0, sizeof(uint8_t*) * s->plane[i].available_lines * (s->is_ring ? 3 : 1));
s->should_free_lines = 0;
}
/*
slice lines contains extra bytes for vectorial code thus @size
is the allocated memory size and @width is the number of pixels
*/
static int alloc_lines(SwsSlice *s, int size, int width)
{
int i;
int idx[2] = {3, 2};
s->should_free_lines = 1;
s->width = width;
for (i = 0; i < 2; ++i) {
int n = s->plane[i].available_lines;
int j;
int ii = idx[i];
av_assert0(n == s->plane[ii].available_lines);
for (j = 0; j < n; ++j) {
// chroma plane line U and V are expected to be contiguous in memory
// by mmx vertical scaler code
s->plane[i].line[j] = av_malloc(size * 2 + 32);
if (!s->plane[i].line[j]) {
free_lines(s);
return AVERROR(ENOMEM);
}
s->plane[ii].line[j] = s->plane[i].line[j] + size + 16;
if (s->is_ring) {
s->plane[i].line[j+n] = s->plane[i].line[j];
s->plane[ii].line[j+n] = s->plane[ii].line[j];
}
}
}
return 0;
}
static int alloc_slice(SwsSlice *s, enum AVPixelFormat fmt, int lumLines, int chrLines, int h_sub_sample, int v_sub_sample, int ring)
{
int i;
int size[4] = { lumLines,
chrLines,
chrLines,
lumLines };
s->h_chr_sub_sample = h_sub_sample;
s->v_chr_sub_sample = v_sub_sample;
s->fmt = fmt;
s->is_ring = ring;
s->should_free_lines = 0;
for (i = 0; i < 4; ++i) {
int n = size[i] * ( ring == 0 ? 1 : 3);
s->plane[i].line = av_calloc(n, sizeof(*s->plane[i].line));
if (!s->plane[i].line)
return AVERROR(ENOMEM);
s->plane[i].tmp = ring ? s->plane[i].line + size[i] * 2 : NULL;
s->plane[i].available_lines = size[i];
s->plane[i].sliceY = 0;
s->plane[i].sliceH = 0;
}
return 0;
}
static void free_slice(SwsSlice *s)
{
int i;
if (s) {
if (s->should_free_lines)
free_lines(s);
for (i = 0; i < 4; ++i) {
av_freep(&s->plane[i].line);
s->plane[i].tmp = NULL;
}
}
}
int ff_rotate_slice(SwsSlice *s, int lum, int chr)
{
int i;
if (lum) {
for (i = 0; i < 4; i+=3) {
int n = s->plane[i].available_lines;
int l = lum - s->plane[i].sliceY;
if (l >= n * 2) {
s->plane[i].sliceY += n;
s->plane[i].sliceH -= n;
}
}
}
if (chr) {
for (i = 1; i < 3; ++i) {
int n = s->plane[i].available_lines;
int l = chr - s->plane[i].sliceY;
if (l >= n * 2) {
s->plane[i].sliceY += n;
s->plane[i].sliceH -= n;
}
}
}
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 i = 0;
const int start[4] = {lumY,
chrY,
chrY,
lumY};
const int end[4] = {lumY +lumH,
chrY + chrH,
chrY + chrH,
lumY + lumH};
s->width = srcW;
for (i = 0; i < 4 && src[i] != NULL; ++i) {
uint8_t *const src_i = src[i] + (relative ? 0 : start[i]) * stride[i];
int j;
int first = s->plane[i].sliceY;
int n = s->plane[i].available_lines;
int lines = end[i] - start[i];
int tot_lines = end[i] - first;
if (start[i] >= first && n >= tot_lines) {
s->plane[i].sliceH = FFMAX(tot_lines, s->plane[i].sliceH);
for (j = 0; j < lines; j+= 1)
s->plane[i].line[start[i] - first + j] = src_i + j * stride[i];
} else {
s->plane[i].sliceY = start[i];
lines = lines > n ? n : lines;
s->plane[i].sliceH = lines;
for (j = 0; j < lines; j+= 1)
s->plane[i].line[j] = src_i + j * stride[i];
}
}
return 0;
}
static void fill_ones(SwsSlice *s, int n, int bpc)
{
int i, j, k, size, end;
for (i = 0; i < 4; ++i) {
size = s->plane[i].available_lines;
for (j = 0; j < size; ++j) {
if (bpc == 16) {
end = (n>>1) + 1;
for (k = 0; k < end; ++k)
((int32_t*)(s->plane[i].line[j]))[k] = 1<<18;
} else if (bpc == 32) {
end = (n>>2) + 1;
for (k = 0; k < end; ++k)
((int64_t*)(s->plane[i].line[j]))[k] = 1LL<<34;
} else {
end = n + 1;
for (k = 0; k < end; ++k)
((int16_t*)(s->plane[i].line[j]))[k] = 1<<14;
}
}
}
}
/*
Calculates the minimum ring buffer size, it should be able to store vFilterSize
more n lines where n is the max difference between each adjacent slice which
outputs a line.
The n lines are needed only when there is not enough src lines to output a single
dst line, then we should buffer these lines to process them on the next call to scale.
*/
static void get_min_buffer_size(SwsContext *c, int *out_lum_size, int *out_chr_size)
{
int lumY;
int dstH = c->dstH;
int chrDstH = c->chrDstH;
int *lumFilterPos = c->vLumFilterPos;
int *chrFilterPos = c->vChrFilterPos;
int lumFilterSize = c->vLumFilterSize;
int chrFilterSize = c->vChrFilterSize;
int chrSubSample = c->chrSrcVSubSample;
*out_lum_size = lumFilterSize;
*out_chr_size = chrFilterSize;
for (lumY = 0; lumY < dstH; lumY++) {
int chrY = (int64_t)lumY * chrDstH / dstH;
int nextSlice = FFMAX(lumFilterPos[lumY] + lumFilterSize - 1,
((chrFilterPos[chrY] + chrFilterSize - 1)
<< chrSubSample));
nextSlice >>= chrSubSample;
nextSlice <<= chrSubSample;
(*out_lum_size) = FFMAX((*out_lum_size), nextSlice - lumFilterPos[lumY]);
(*out_chr_size) = FFMAX((*out_chr_size), (nextSlice >> chrSubSample) - chrFilterPos[chrY]);
}
}
int ff_init_filters(SwsContext * c)
{
int i;
int index;
int num_ydesc;
int num_cdesc;
int num_vdesc = isPlanarYUV(c->dstFormat) && !isGray(c->dstFormat) ? 2 : 1;
int need_lum_conv = c->lumToYV12 || c->readLumPlanar || c->alpToYV12 || c->readAlpPlanar;
int need_chr_conv = c->chrToYV12 || c->readChrPlanar;
int need_gamma = c->is_internal_gamma;
int srcIdx, dstIdx;
int dst_stride = FFALIGN(c->dstW * sizeof(int16_t) + 66, 16);
uint32_t * pal = usePal(c->srcFormat) ? c->pal_yuv : (uint32_t*)c->input_rgb2yuv_table;
int res = 0;
int lumBufSize;
int chrBufSize;
get_min_buffer_size(c, &lumBufSize, &chrBufSize);
lumBufSize = FFMAX(lumBufSize, c->vLumFilterSize + MAX_LINES_AHEAD);
chrBufSize = FFMAX(chrBufSize, c->vChrFilterSize + MAX_LINES_AHEAD);
if (c->dstBpc == 16)
dst_stride <<= 1;
if (c->dstBpc == 32)
dst_stride <<= 2;
num_ydesc = need_lum_conv ? 2 : 1;
num_cdesc = need_chr_conv ? 2 : 1;
c->numSlice = FFMAX(num_ydesc, num_cdesc) + 2;
c->numDesc = num_ydesc + num_cdesc + num_vdesc + (need_gamma ? 2 : 0);
c->descIndex[0] = num_ydesc + (need_gamma ? 1 : 0);
c->descIndex[1] = num_ydesc + num_cdesc + (need_gamma ? 1 : 0);
if (isFloat16(c->srcFormat)) {
c->h2f_tables = av_malloc(sizeof(*c->h2f_tables));
if (!c->h2f_tables)
return AVERROR(ENOMEM);
ff_init_half2float_tables(c->h2f_tables);
c->input_opaque = c->h2f_tables;
}
c->desc = av_calloc(c->numDesc, sizeof(*c->desc));
if (!c->desc)
return AVERROR(ENOMEM);
c->slice = av_calloc(c->numSlice, sizeof(*c->slice));
if (!c->slice) {
res = AVERROR(ENOMEM);
goto cleanup;
}
res = alloc_slice(&c->slice[0], c->srcFormat, c->srcH, c->chrSrcH, c->chrSrcHSubSample, c->chrSrcVSubSample, 0);
if (res < 0) goto cleanup;
for (i = 1; i < c->numSlice-2; ++i) {
res = alloc_slice(&c->slice[i], c->srcFormat, lumBufSize, chrBufSize, c->chrSrcHSubSample, c->chrSrcVSubSample, 0);
if (res < 0) goto cleanup;
res = alloc_lines(&c->slice[i], FFALIGN(c->srcW*2+78, 16), c->srcW);
if (res < 0) goto cleanup;
}
// horizontal scaler output
res = alloc_slice(&c->slice[i], c->srcFormat, lumBufSize, chrBufSize, c->chrDstHSubSample, c->chrDstVSubSample, 1);
if (res < 0) goto cleanup;
res = alloc_lines(&c->slice[i], dst_stride, c->dstW);
if (res < 0) goto cleanup;
fill_ones(&c->slice[i], dst_stride>>1, c->dstBpc);
// vertical scaler output
++i;
res = alloc_slice(&c->slice[i], c->dstFormat, c->dstH, c->chrDstH, c->chrDstHSubSample, c->chrDstVSubSample, 0);
if (res < 0) goto cleanup;
index = 0;
srcIdx = 0;
dstIdx = 1;
if (need_gamma) {
res = ff_init_gamma_convert(c->desc + index, c->slice + srcIdx, c->inv_gamma);
if (res < 0) goto cleanup;
++index;
}
if (need_lum_conv) {
res = ff_init_desc_fmt_convert(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx], pal);
if (res < 0) goto cleanup;
c->desc[index].alpha = c->needAlpha;
++index;
srcIdx = dstIdx;
}
dstIdx = FFMAX(num_ydesc, num_cdesc);
res = ff_init_desc_hscale(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx], c->hLumFilter, c->hLumFilterPos, c->hLumFilterSize, c->lumXInc);
if (res < 0) goto cleanup;
c->desc[index].alpha = c->needAlpha;
++index;
{
srcIdx = 0;
dstIdx = 1;
if (need_chr_conv) {
res = ff_init_desc_cfmt_convert(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx], pal);
if (res < 0) goto cleanup;
++index;
srcIdx = dstIdx;
}
dstIdx = FFMAX(num_ydesc, num_cdesc);
if (c->needs_hcscale)
res = ff_init_desc_chscale(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx], c->hChrFilter, c->hChrFilterPos, c->hChrFilterSize, c->chrXInc);
else
res = ff_init_desc_no_chr(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx]);
if (res < 0) goto cleanup;
}
++index;
{
srcIdx = c->numSlice - 2;
dstIdx = c->numSlice - 1;
res = ff_init_vscale(c, c->desc + index, c->slice + srcIdx, c->slice + dstIdx);
if (res < 0) goto cleanup;
}
++index;
if (need_gamma) {
res = ff_init_gamma_convert(c->desc + index, c->slice + dstIdx, c->gamma);
if (res < 0) goto cleanup;
}
return 0;
cleanup:
ff_free_filters(c);
return res;
}
int ff_free_filters(SwsContext *c)
{
int i;
if (c->desc) {
for (i = 0; i < c->numDesc; ++i)
av_freep(&c->desc[i].instance);
av_freep(&c->desc);
}
if (c->slice) {
for (i = 0; i < c->numSlice; ++i)
free_slice(&c->slice[i]);
av_freep(&c->slice);
}
av_freep(&c->h2f_tables);
return 0;
}