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