644 lines
21 KiB
C
Executable file
644 lines
21 KiB
C
Executable file
/*
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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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/**
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* @file
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* misc image utilities
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*/
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#include "avassert.h"
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#include "common.h"
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#include "imgutils.h"
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#include "imgutils_internal.h"
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#include "internal.h"
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#include "intreadwrite.h"
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#include "log.h"
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#include "mathematics.h"
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#include "pixdesc.h"
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#include "rational.h"
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void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
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const AVPixFmtDescriptor *pixdesc)
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{
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int i;
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memset(max_pixsteps, 0, 4*sizeof(max_pixsteps[0]));
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if (max_pixstep_comps)
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memset(max_pixstep_comps, 0, 4*sizeof(max_pixstep_comps[0]));
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for (i = 0; i < 4; i++) {
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const AVComponentDescriptor *comp = &(pixdesc->comp[i]);
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if (comp->step > max_pixsteps[comp->plane]) {
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max_pixsteps[comp->plane] = comp->step;
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if (max_pixstep_comps)
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max_pixstep_comps[comp->plane] = i;
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}
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}
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}
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static inline
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int image_get_linesize(int width, int plane,
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int max_step, int max_step_comp,
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const AVPixFmtDescriptor *desc)
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{
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int s, shifted_w, linesize;
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if (!desc)
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return AVERROR(EINVAL);
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if (width < 0)
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return AVERROR(EINVAL);
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s = (max_step_comp == 1 || max_step_comp == 2) ? desc->log2_chroma_w : 0;
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shifted_w = ((width + (1 << s) - 1)) >> s;
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if (shifted_w && max_step > INT_MAX / shifted_w)
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return AVERROR(EINVAL);
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linesize = max_step * shifted_w;
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if (desc->flags & AV_PIX_FMT_FLAG_BITSTREAM)
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linesize = (linesize + 7) >> 3;
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return linesize;
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}
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int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
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{
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
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int max_step [4]; /* max pixel step for each plane */
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int max_step_comp[4]; /* the component for each plane which has the max pixel step */
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if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
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return AVERROR(EINVAL);
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av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
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return image_get_linesize(width, plane, max_step[plane], max_step_comp[plane], desc);
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}
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int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
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{
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int i, ret;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
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int max_step [4]; /* max pixel step for each plane */
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int max_step_comp[4]; /* the component for each plane which has the max pixel step */
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memset(linesizes, 0, 4*sizeof(linesizes[0]));
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if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
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return AVERROR(EINVAL);
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av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
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for (i = 0; i < 4; i++) {
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if ((ret = image_get_linesize(width, i, max_step[i], max_step_comp[i], desc)) < 0)
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return ret;
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linesizes[i] = ret;
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}
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return 0;
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}
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int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int height,
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uint8_t *ptr, const int linesizes[4])
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{
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int i, total_size, size[4] = { 0 }, has_plane[4] = { 0 };
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
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memset(data , 0, sizeof(data[0])*4);
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if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
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return AVERROR(EINVAL);
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data[0] = ptr;
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if (linesizes[0] > (INT_MAX - 1024) / height)
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return AVERROR(EINVAL);
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size[0] = linesizes[0] * height;
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if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
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desc->flags & FF_PSEUDOPAL) {
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data[1] = ptr + size[0]; /* palette is stored here as 256 32 bits words */
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return size[0] + 256 * 4;
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}
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for (i = 0; i < 4; i++)
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has_plane[desc->comp[i].plane] = 1;
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total_size = size[0];
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for (i = 1; i < 4 && has_plane[i]; i++) {
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int h, s = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
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data[i] = data[i-1] + size[i-1];
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h = (height + (1 << s) - 1) >> s;
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if (linesizes[i] > INT_MAX / h)
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return AVERROR(EINVAL);
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size[i] = h * linesizes[i];
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if (total_size > INT_MAX - size[i])
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return AVERROR(EINVAL);
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total_size += size[i];
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}
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return total_size;
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}
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int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
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{
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int i;
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for (i = 0; i < 256; i++) {
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int r, g, b;
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switch (pix_fmt) {
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case AV_PIX_FMT_RGB8:
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r = (i>>5 )*36;
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g = ((i>>2)&7)*36;
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b = (i&3 )*85;
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break;
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case AV_PIX_FMT_BGR8:
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b = (i>>6 )*85;
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g = ((i>>3)&7)*36;
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r = (i&7 )*36;
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break;
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case AV_PIX_FMT_RGB4_BYTE:
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r = (i>>3 )*255;
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g = ((i>>1)&3)*85;
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b = (i&1 )*255;
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break;
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case AV_PIX_FMT_BGR4_BYTE:
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b = (i>>3 )*255;
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g = ((i>>1)&3)*85;
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r = (i&1 )*255;
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break;
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case AV_PIX_FMT_GRAY8:
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r = b = g = i;
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break;
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default:
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return AVERROR(EINVAL);
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}
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pal[i] = b + (g << 8) + (r << 16) + (0xFFU << 24);
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}
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return 0;
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}
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int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
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int w, int h, enum AVPixelFormat pix_fmt, int align)
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{
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
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int i, ret;
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uint8_t *buf;
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if (!desc)
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return AVERROR(EINVAL);
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if ((ret = av_image_check_size(w, h, 0, NULL)) < 0)
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return ret;
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if ((ret = av_image_fill_linesizes(linesizes, pix_fmt, align>7 ? FFALIGN(w, 8) : w)) < 0)
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return ret;
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for (i = 0; i < 4; i++)
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linesizes[i] = FFALIGN(linesizes[i], align);
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if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, NULL, linesizes)) < 0)
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return ret;
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buf = av_malloc(ret + align);
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if (!buf)
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return AVERROR(ENOMEM);
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if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, buf, linesizes)) < 0) {
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av_free(buf);
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return ret;
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}
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if (desc->flags & AV_PIX_FMT_FLAG_PAL || (desc->flags & FF_PSEUDOPAL && pointers[1])) {
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avpriv_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
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if (align < 4) {
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av_log(NULL, AV_LOG_ERROR, "Formats with a palette require a minimum alignment of 4\n");
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return AVERROR(EINVAL);
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}
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}
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if ((desc->flags & AV_PIX_FMT_FLAG_PAL ||
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desc->flags & FF_PSEUDOPAL) && pointers[1] &&
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pointers[1] - pointers[0] > linesizes[0] * h) {
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/* zero-initialize the padding before the palette */
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memset(pointers[0] + linesizes[0] * h, 0,
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pointers[1] - pointers[0] - linesizes[0] * h);
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}
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return ret;
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}
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typedef struct ImgUtils {
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const AVClass *class;
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int log_offset;
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void *log_ctx;
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} ImgUtils;
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static const AVClass imgutils_class = {
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.class_name = "IMGUTILS",
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.item_name = av_default_item_name,
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.option = NULL,
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.version = LIBAVUTIL_VERSION_INT,
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.log_level_offset_offset = offsetof(ImgUtils, log_offset),
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.parent_log_context_offset = offsetof(ImgUtils, log_ctx),
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};
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int av_image_check_size2(unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx)
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{
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ImgUtils imgutils = {
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.class = &imgutils_class,
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.log_offset = log_offset,
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.log_ctx = log_ctx,
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};
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int64_t stride = av_image_get_linesize(pix_fmt, w, 0);
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if (stride <= 0)
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stride = 8LL*w;
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stride += 128*8;
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if ((int)w<=0 || (int)h<=0 || stride >= INT_MAX || stride*(uint64_t)(h+128) >= INT_MAX) {
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av_log(&imgutils, AV_LOG_ERROR, "Picture size %ux%u is invalid\n", w, h);
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return AVERROR(EINVAL);
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}
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if (max_pixels < INT64_MAX) {
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if (w*(int64_t)h > max_pixels) {
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av_log(&imgutils, AV_LOG_ERROR,
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"Picture size %ux%u exceeds specified max pixel count %"PRId64", see the documentation if you wish to increase it\n",
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w, h, max_pixels);
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return AVERROR(EINVAL);
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}
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}
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return 0;
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}
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int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
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{
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return av_image_check_size2(w, h, INT64_MAX, AV_PIX_FMT_NONE, log_offset, log_ctx);
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}
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int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
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{
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int64_t scaled_dim;
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if (sar.den <= 0 || sar.num < 0)
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return AVERROR(EINVAL);
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if (!sar.num || sar.num == sar.den)
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return 0;
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if (sar.num < sar.den)
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scaled_dim = av_rescale_rnd(w, sar.num, sar.den, AV_ROUND_ZERO);
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else
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scaled_dim = av_rescale_rnd(h, sar.den, sar.num, AV_ROUND_ZERO);
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if (scaled_dim > 0)
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return 0;
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return AVERROR(EINVAL);
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}
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static void image_copy_plane(uint8_t *dst, ptrdiff_t dst_linesize,
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const uint8_t *src, ptrdiff_t src_linesize,
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ptrdiff_t bytewidth, int height)
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{
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if (!dst || !src)
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return;
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av_assert0(FFABS(src_linesize) >= bytewidth);
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av_assert0(FFABS(dst_linesize) >= bytewidth);
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for (;height > 0; height--) {
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memcpy(dst, src, bytewidth);
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dst += dst_linesize;
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src += src_linesize;
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}
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}
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static void image_copy_plane_uc_from(uint8_t *dst, ptrdiff_t dst_linesize,
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const uint8_t *src, ptrdiff_t src_linesize,
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ptrdiff_t bytewidth, int height)
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{
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int ret = -1;
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#if ARCH_X86
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ret = ff_image_copy_plane_uc_from_x86(dst, dst_linesize, src, src_linesize,
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bytewidth, height);
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#endif
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if (ret < 0)
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image_copy_plane(dst, dst_linesize, src, src_linesize, bytewidth, height);
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}
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void av_image_copy_plane(uint8_t *dst, int dst_linesize,
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const uint8_t *src, int src_linesize,
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int bytewidth, int height)
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{
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image_copy_plane(dst, dst_linesize, src, src_linesize, bytewidth, height);
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}
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static void image_copy(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4],
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const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4],
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enum AVPixelFormat pix_fmt, int width, int height,
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void (*copy_plane)(uint8_t *, ptrdiff_t, const uint8_t *,
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ptrdiff_t, ptrdiff_t, int))
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{
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
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if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
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return;
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if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
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desc->flags & FF_PSEUDOPAL) {
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copy_plane(dst_data[0], dst_linesizes[0],
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src_data[0], src_linesizes[0],
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width, height);
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/* copy the palette */
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if ((desc->flags & AV_PIX_FMT_FLAG_PAL) || (dst_data[1] && src_data[1]))
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memcpy(dst_data[1], src_data[1], 4*256);
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} else {
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int i, planes_nb = 0;
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for (i = 0; i < desc->nb_components; i++)
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planes_nb = FFMAX(planes_nb, desc->comp[i].plane + 1);
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for (i = 0; i < planes_nb; i++) {
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int h = height;
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ptrdiff_t bwidth = av_image_get_linesize(pix_fmt, width, i);
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if (bwidth < 0) {
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av_log(NULL, AV_LOG_ERROR, "av_image_get_linesize failed\n");
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return;
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}
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if (i == 1 || i == 2) {
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h = AV_CEIL_RSHIFT(height, desc->log2_chroma_h);
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}
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copy_plane(dst_data[i], dst_linesizes[i],
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src_data[i], src_linesizes[i],
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bwidth, h);
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}
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}
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}
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void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
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const uint8_t *src_data[4], const int src_linesizes[4],
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enum AVPixelFormat pix_fmt, int width, int height)
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{
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ptrdiff_t dst_linesizes1[4], src_linesizes1[4];
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int i;
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for (i = 0; i < 4; i++) {
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dst_linesizes1[i] = dst_linesizes[i];
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src_linesizes1[i] = src_linesizes[i];
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}
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image_copy(dst_data, dst_linesizes1, src_data, src_linesizes1, pix_fmt,
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width, height, image_copy_plane);
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}
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void av_image_copy_uc_from(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4],
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const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4],
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enum AVPixelFormat pix_fmt, int width, int height)
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{
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image_copy(dst_data, dst_linesizes, src_data, src_linesizes, pix_fmt,
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width, height, image_copy_plane_uc_from);
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}
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int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4],
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const uint8_t *src, enum AVPixelFormat pix_fmt,
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int width, int height, int align)
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{
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int ret, i;
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ret = av_image_check_size(width, height, 0, NULL);
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if (ret < 0)
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return ret;
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ret = av_image_fill_linesizes(dst_linesize, pix_fmt, width);
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if (ret < 0)
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return ret;
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for (i = 0; i < 4; i++)
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dst_linesize[i] = FFALIGN(dst_linesize[i], align);
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return av_image_fill_pointers(dst_data, pix_fmt, height, (uint8_t *)src, dst_linesize);
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}
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int av_image_get_buffer_size(enum AVPixelFormat pix_fmt,
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int width, int height, int align)
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{
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uint8_t *data[4];
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int linesize[4];
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int ret;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
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if (!desc)
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return AVERROR(EINVAL);
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ret = av_image_check_size(width, height, 0, NULL);
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if (ret < 0)
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return ret;
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// do not include palette for these pseudo-paletted formats
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if (desc->flags & FF_PSEUDOPAL)
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return FFALIGN(width, align) * height;
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return av_image_fill_arrays(data, linesize, NULL, pix_fmt,
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width, height, align);
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}
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int av_image_copy_to_buffer(uint8_t *dst, int dst_size,
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const uint8_t * const src_data[4],
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const int src_linesize[4],
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enum AVPixelFormat pix_fmt,
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int width, int height, int align)
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{
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int i, j, nb_planes = 0, linesize[4];
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int size = av_image_get_buffer_size(pix_fmt, width, height, align);
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
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int ret;
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if (size > dst_size || size < 0 || !desc)
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return AVERROR(EINVAL);
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for (i = 0; i < desc->nb_components; i++)
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nb_planes = FFMAX(desc->comp[i].plane, nb_planes);
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nb_planes++;
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ret = av_image_fill_linesizes(linesize, pix_fmt, width);
|
|
av_assert0(ret >= 0); // was checked previously
|
|
|
|
for (i = 0; i < nb_planes; i++) {
|
|
int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
|
|
const uint8_t *src = src_data[i];
|
|
h = (height + (1 << shift) - 1) >> shift;
|
|
|
|
for (j = 0; j < h; j++) {
|
|
memcpy(dst, src, linesize[i]);
|
|
dst += FFALIGN(linesize[i], align);
|
|
src += src_linesize[i];
|
|
}
|
|
}
|
|
|
|
if (desc->flags & AV_PIX_FMT_FLAG_PAL) {
|
|
uint32_t *d32 = (uint32_t *)dst;
|
|
|
|
for (i = 0; i<256; i++)
|
|
AV_WL32(d32 + i, AV_RN32(src_data[1] + 4*i));
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
// Fill dst[0..dst_size] with the bytes in clear[0..clear_size]. The clear
|
|
// bytes are repeated until dst_size is reached. If dst_size is unaligned (i.e.
|
|
// dst_size%clear_size!=0), the remaining data will be filled with the beginning
|
|
// of the clear data only.
|
|
static void memset_bytes(uint8_t *dst, size_t dst_size, uint8_t *clear,
|
|
size_t clear_size)
|
|
{
|
|
int same = 1;
|
|
int i;
|
|
|
|
if (!clear_size)
|
|
return;
|
|
|
|
// Reduce to memset() if possible.
|
|
for (i = 0; i < clear_size; i++) {
|
|
if (clear[i] != clear[0]) {
|
|
same = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (same)
|
|
clear_size = 1;
|
|
|
|
if (clear_size == 1) {
|
|
memset(dst, clear[0], dst_size);
|
|
} else {
|
|
if (clear_size > dst_size)
|
|
clear_size = dst_size;
|
|
memcpy(dst, clear, clear_size);
|
|
av_memcpy_backptr(dst + clear_size, clear_size, dst_size - clear_size);
|
|
}
|
|
}
|
|
|
|
// Maximum size in bytes of a plane element (usually a pixel, or multiple pixels
|
|
// if it's a subsampled packed format).
|
|
#define MAX_BLOCK_SIZE 32
|
|
|
|
int av_image_fill_black(uint8_t *dst_data[4], const ptrdiff_t dst_linesize[4],
|
|
enum AVPixelFormat pix_fmt, enum AVColorRange range,
|
|
int width, int height)
|
|
{
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
|
|
int nb_planes = av_pix_fmt_count_planes(pix_fmt);
|
|
// A pixel or a group of pixels on each plane, with a value that represents black.
|
|
// Consider e.g. AV_PIX_FMT_UYVY422 for non-trivial cases.
|
|
uint8_t clear_block[4][MAX_BLOCK_SIZE] = {{0}}; // clear padding with 0
|
|
int clear_block_size[4] = {0};
|
|
ptrdiff_t plane_line_bytes[4] = {0};
|
|
int rgb, limited;
|
|
int plane, c;
|
|
|
|
if (!desc || nb_planes < 1 || nb_planes > 4 || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
|
|
return AVERROR(EINVAL);
|
|
|
|
rgb = !!(desc->flags & AV_PIX_FMT_FLAG_RGB);
|
|
limited = !rgb && range != AVCOL_RANGE_JPEG;
|
|
|
|
if (desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) {
|
|
ptrdiff_t bytewidth = av_image_get_linesize(pix_fmt, width, 0);
|
|
uint8_t *data;
|
|
int mono = pix_fmt == AV_PIX_FMT_MONOWHITE || pix_fmt == AV_PIX_FMT_MONOBLACK;
|
|
int fill = pix_fmt == AV_PIX_FMT_MONOWHITE ? 0xFF : 0;
|
|
if (nb_planes != 1 || !(rgb || mono) || bytewidth < 1)
|
|
return AVERROR(EINVAL);
|
|
|
|
if (!dst_data)
|
|
return 0;
|
|
|
|
data = dst_data[0];
|
|
|
|
// (Bitstream + alpha will be handled incorrectly - it'll remain transparent.)
|
|
for (;height > 0; height--) {
|
|
memset(data, fill, bytewidth);
|
|
data += dst_linesize[0];
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
for (c = 0; c < desc->nb_components; c++) {
|
|
const AVComponentDescriptor comp = desc->comp[c];
|
|
|
|
// We try to operate on entire non-subsampled pixel groups (for
|
|
// AV_PIX_FMT_UYVY422 this would mean two consecutive pixels).
|
|
clear_block_size[comp.plane] = FFMAX(clear_block_size[comp.plane], comp.step);
|
|
|
|
if (clear_block_size[comp.plane] > MAX_BLOCK_SIZE)
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
// Create a byte array for clearing 1 pixel (sometimes several pixels).
|
|
for (c = 0; c < desc->nb_components; c++) {
|
|
const AVComponentDescriptor comp = desc->comp[c];
|
|
// (Multiple pixels happen e.g. with AV_PIX_FMT_UYVY422.)
|
|
int w = clear_block_size[comp.plane] / comp.step;
|
|
uint8_t *c_data[4];
|
|
const int c_linesize[4] = {0};
|
|
uint16_t src_array[MAX_BLOCK_SIZE];
|
|
uint16_t src = 0;
|
|
int x;
|
|
|
|
if (comp.depth > 16)
|
|
return AVERROR(EINVAL);
|
|
if (!rgb && comp.depth < 8)
|
|
return AVERROR(EINVAL);
|
|
if (w < 1)
|
|
return AVERROR(EINVAL);
|
|
|
|
if (c == 0 && limited) {
|
|
src = 16 << (comp.depth - 8);
|
|
} else if ((c == 1 || c == 2) && !rgb) {
|
|
src = 128 << (comp.depth - 8);
|
|
} else if (c == 3) {
|
|
// (Assume even limited YUV uses full range alpha.)
|
|
src = (1 << comp.depth) - 1;
|
|
}
|
|
|
|
for (x = 0; x < w; x++)
|
|
src_array[x] = src;
|
|
|
|
for (x = 0; x < 4; x++)
|
|
c_data[x] = &clear_block[x][0];
|
|
|
|
av_write_image_line(src_array, c_data, c_linesize, desc, 0, 0, c, w);
|
|
}
|
|
|
|
for (plane = 0; plane < nb_planes; plane++) {
|
|
plane_line_bytes[plane] = av_image_get_linesize(pix_fmt, width, plane);
|
|
if (plane_line_bytes[plane] < 0)
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (!dst_data)
|
|
return 0;
|
|
|
|
for (plane = 0; plane < nb_planes; plane++) {
|
|
size_t bytewidth = plane_line_bytes[plane];
|
|
uint8_t *data = dst_data[plane];
|
|
int chroma_div = plane == 1 || plane == 2 ? desc->log2_chroma_h : 0;
|
|
int plane_h = ((height + ( 1 << chroma_div) - 1)) >> chroma_div;
|
|
|
|
for (; plane_h > 0; plane_h--) {
|
|
memset_bytes(data, bytewidth, &clear_block[plane][0], clear_block_size[plane]);
|
|
data += dst_linesize[plane];
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|