mirror of
https://github.com/FFmpeg/FFmpeg.git
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330 lines
9.6 KiB
C
330 lines
9.6 KiB
C
/*
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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 vetorial 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)
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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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s->width = srcW;
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for (i = 0; i < 4; ++i) {
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int j;
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int lines = end[i];
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lines = s->plane[i].available_lines < lines ? s->plane[i].available_lines : lines;
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if (end[i] > s->plane[i].sliceY+s->plane[i].sliceH) {
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if (start[i] <= s->plane[i].sliceY+1)
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s->plane[i].sliceY = FFMIN(start[i], s->plane[i].sliceY);
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else
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s->plane[i].sliceY = start[i];
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s->plane[i].sliceH = end[i] - s->plane[i].sliceY;
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} else {
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if (end[i] >= s->plane[i].sliceY)
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s->plane[i].sliceH = s->plane[i].sliceY + s->plane[i].sliceH - start[i];
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else
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s->plane[i].sliceH = end[i] - start[i];
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s->plane[i].sliceY = start[i];
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}
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for (j = start[i]; j < lines; j+= 1)
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s->plane[i].line[j] = src[i] + (start[i] + j) * stride[i];
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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 is16bit)
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{
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int i;
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for (i = 0; i < 4; ++i) {
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int j;
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int size = s->plane[i].available_lines;
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for (j = 0; j < size; ++j) {
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int k;
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int end = is16bit ? n>>1: n;
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// fill also one extra element
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end += 1;
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if (is16bit)
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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
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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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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 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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if (c->dstBpc == 16)
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dst_stride <<= 1;
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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;
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c->descIndex[0] = num_ydesc;
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c->descIndex[1] = num_ydesc + num_cdesc;
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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, c->vLumFilterSize + MAX_LINES_AHEAD, c->vChrFilterSize + MAX_LINES_AHEAD, 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, c->vLumFilterSize + MAX_LINES_AHEAD, c->vChrFilterSize + MAX_LINES_AHEAD, 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 == 16);
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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_lum_conv) {
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ff_init_desc_fmt_convert(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx], pal);
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c->desc[index].alpha = c->alpPixBuf != 0;
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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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ff_init_desc_hscale(&c->desc[index], &c->slice[index], &c->slice[dstIdx], c->hLumFilter, c->hLumFilterPos, c->hLumFilterSize, c->lumXInc);
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c->desc[index].alpha = c->alpPixBuf != 0;
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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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ff_init_desc_cfmt_convert(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx], pal);
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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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if (c->needs_hcscale)
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ff_init_desc_chscale(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx], c->hChrFilter, c->hChrFilterPos, c->hChrFilterSize, c->chrXInc);
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else
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ff_init_desc_no_chr(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx]);
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}
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++index;
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{
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srcIdx = c->numSlice - 2;
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dstIdx = c->numSlice - 1;
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ff_init_vscale(c, c->desc + index, c->slice + srcIdx, c->slice + dstIdx);
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}
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return 0;
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cleanup:
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ff_free_filters(c);
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return res;
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}
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int ff_free_filters(SwsContext *c)
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{
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int i;
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if (c->desc) {
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for (i = 0; i < c->numDesc; ++i)
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av_freep(&c->desc[i].instance);
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av_freep(&c->desc);
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}
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if (c->slice) {
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for (i = 0; i < c->numSlice; ++i)
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free_slice(&c->slice[i]);
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av_freep(&c->slice);
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}
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return 0;
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}
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