8ec0832743
This new API stores useful data in a dedicated structure and has clearly delimited init functions. Hopefully, uses of the old API can be replaced quickly.
313 lines
11 KiB
C
313 lines
11 KiB
C
/*
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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 "libavutil/avutil.h"
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#include "libavutil/colorspace.h"
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#include "libavutil/pixdesc.h"
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#include "drawutils.h"
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enum { RED = 0, GREEN, BLUE, ALPHA };
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int ff_fill_rgba_map(uint8_t *rgba_map, enum PixelFormat pix_fmt)
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{
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switch (pix_fmt) {
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case PIX_FMT_0RGB:
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case PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
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case PIX_FMT_0BGR:
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case PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break;
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case PIX_FMT_RGB0:
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case PIX_FMT_RGBA:
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case PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break;
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case PIX_FMT_BGRA:
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case PIX_FMT_BGR0:
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case PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
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default: /* unsupported */
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return AVERROR(EINVAL);
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}
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return 0;
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}
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int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4],
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enum PixelFormat pix_fmt, uint8_t rgba_color[4],
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int *is_packed_rgba, uint8_t rgba_map_ptr[4])
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{
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uint8_t rgba_map[4] = {0};
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int i;
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const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[pix_fmt];
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int hsub = pix_desc->log2_chroma_w;
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*is_packed_rgba = ff_fill_rgba_map(rgba_map, pix_fmt) >= 0;
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if (*is_packed_rgba) {
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pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;
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for (i = 0; i < 4; i++)
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dst_color[rgba_map[i]] = rgba_color[i];
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line[0] = av_malloc(w * pixel_step[0]);
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for (i = 0; i < w; i++)
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memcpy(line[0] + i * pixel_step[0], dst_color, pixel_step[0]);
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if (rgba_map_ptr)
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memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4);
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} else {
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int plane;
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dst_color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
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dst_color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
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dst_color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
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dst_color[3] = rgba_color[3];
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for (plane = 0; plane < 4; plane++) {
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int line_size;
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int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;
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pixel_step[plane] = 1;
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line_size = (w >> hsub1) * pixel_step[plane];
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line[plane] = av_malloc(line_size);
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memset(line[plane], dst_color[plane], line_size);
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}
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}
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return 0;
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}
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void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],
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uint8_t *src[4], int pixelstep[4],
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int hsub, int vsub, int x, int y, int w, int h)
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{
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int i, plane;
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uint8_t *p;
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for (plane = 0; plane < 4 && dst[plane]; plane++) {
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int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
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int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
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p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
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for (i = 0; i < (h >> vsub1); i++) {
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memcpy(p + (x >> hsub1) * pixelstep[plane],
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src[plane], (w >> hsub1) * pixelstep[plane]);
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p += dst_linesize[plane];
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}
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}
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}
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void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],
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uint8_t *src[4], int src_linesize[4], int pixelstep[4],
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int hsub, int vsub, int x, int y, int y2, int w, int h)
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{
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int i, plane;
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uint8_t *p;
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for (plane = 0; plane < 4 && dst[plane]; plane++) {
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int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
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int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
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p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
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for (i = 0; i < (h >> vsub1); i++) {
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memcpy(p + (x >> hsub1) * pixelstep[plane],
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src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), (w >> hsub1) * pixelstep[plane]);
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p += dst_linesize[plane];
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}
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}
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}
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int ff_draw_init(FFDrawContext *draw, enum PixelFormat format, unsigned flags)
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{
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const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[format];
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const AVComponentDescriptor *c;
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unsigned i, nb_planes = 0;
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int pixelstep[MAX_PLANES] = { 0 };
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if (desc->flags & ~(PIX_FMT_PLANAR | PIX_FMT_RGB))
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return AVERROR(ENOSYS);
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for (i = 0; i < desc->nb_components; i++) {
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c = &desc->comp[i];
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/* for now, only 8-bits formats */
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if (c->depth_minus1 != 8 - 1)
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return AVERROR(ENOSYS);
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if (c->plane >= MAX_PLANES)
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return AVERROR(ENOSYS);
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/* strange interleaving */
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if (pixelstep[c->plane] != 0 &&
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pixelstep[c->plane] != c->step_minus1 + 1)
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return AVERROR(ENOSYS);
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pixelstep[c->plane] = c->step_minus1 + 1;
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nb_planes = FFMAX(nb_planes, c->plane + 1);
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}
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if ((desc->log2_chroma_w || desc->log2_chroma_h) && nb_planes < 3)
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return AVERROR(ENOSYS); /* exclude NV12 and NV21 */
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memset(draw, 0, sizeof(*draw));
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draw->desc = desc;
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draw->format = format;
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draw->nb_planes = nb_planes;
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memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep));
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if (nb_planes >= 3 && !(desc->flags & PIX_FMT_RGB)) {
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draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w;
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draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h;
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}
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return 0;
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}
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void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, uint8_t rgba[4])
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{
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unsigned i;
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uint8_t rgba_map[4];
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if ((draw->desc->flags & PIX_FMT_RGB) && draw->nb_planes == 1 &&
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ff_fill_rgba_map(rgba_map, draw->format) >= 0) {
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for (i = 0; i < 4; i++)
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color->comp[0].u8[rgba_map[i]] = rgba[i];
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} else if (draw->nb_planes == 3 || draw->nb_planes == 4) {
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/* assume YUV */
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color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
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color->comp[1].u8[0] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
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color->comp[2].u8[0] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);
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color->comp[3].u8[0] = rgba[3];
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} else if (draw->format == PIX_FMT_GRAY8 || draw->format == PIX_FMT_GRAY8A) {
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color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
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color->comp[1].u8[0] = rgba[3];
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} else {
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av_log(NULL, AV_LOG_WARNING,
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"Color conversion not implemented for %s\n", draw->desc->name);
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memset(color, 128, sizeof(*color));
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}
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}
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static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[],
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int plane, int x, int y)
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{
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return data[plane] +
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(y >> draw->vsub[plane]) * linesize[plane] +
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(x >> draw->hsub[plane]) * draw->pixelstep[plane];
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}
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void ff_copy_rectangle2(FFDrawContext *draw,
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uint8_t *dst[], int dst_linesize[],
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uint8_t *src[], int src_linesize[],
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int dst_x, int dst_y, int src_x, int src_y,
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int w, int h)
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{
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int plane, y, wp, hp;
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uint8_t *p, *q;
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for (plane = 0; plane < draw->nb_planes; plane++) {
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p = pointer_at(draw, src, src_linesize, plane, src_x, src_y);
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q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
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wp = (w >> draw->hsub[plane]) * draw->pixelstep[plane];
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hp = (h >> draw->vsub[plane]);
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for (y = 0; y < hp; y++) {
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memcpy(q, p, wp);
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p += src_linesize[plane];
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q += dst_linesize[plane];
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}
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}
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}
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void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,
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uint8_t *dst[], int dst_linesize[],
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int dst_x, int dst_y, int w, int h)
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{
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int plane, x, y, wp, hp;
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uint8_t *p0, *p;
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for (plane = 0; plane < draw->nb_planes; plane++) {
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p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
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wp = (w >> draw->hsub[plane]);
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hp = (h >> draw->vsub[plane]);
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if (!hp)
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return;
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p = p0;
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/* copy first line from color */
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for (x = 0; x < wp; x++) {
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memcpy(p, color->comp[plane].u8, draw->pixelstep[plane]);
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p += draw->pixelstep[plane];
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}
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wp *= draw->pixelstep[plane];
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/* copy next lines from first line */
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p = p0 + dst_linesize[plane];
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for (y = 1; y < hp; y++) {
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memcpy(p, p0, wp);
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p += dst_linesize[plane];
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}
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}
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}
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int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
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int value)
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{
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unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max;
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if (!shift)
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return value;
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if (round_dir >= 0)
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value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1);
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return (value >> shift) << shift;
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}
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AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags)
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{
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enum PixelFormat i, pix_fmts[PIX_FMT_NB + 1];
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unsigned n = 0;
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FFDrawContext draw;
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for (i = 0; i < PIX_FMT_NB; i++)
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if (ff_draw_init(&draw, i, flags) >= 0)
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pix_fmts[n++] = i;
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pix_fmts[n++] = PIX_FMT_NONE;
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return avfilter_make_format_list(pix_fmts);
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}
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#ifdef TEST
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#undef printf
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int main(void)
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{
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enum PixelFormat f;
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const AVPixFmtDescriptor *desc;
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FFDrawContext draw;
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FFDrawColor color;
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int r, i;
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for (f = 0; f < PIX_FMT_NB; f++) {
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desc = &av_pix_fmt_descriptors[f];
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if (!desc->name)
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continue;
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printf("Testing %s...%*s", desc->name,
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(int)(16 - strlen(desc->name)), "");
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r = ff_draw_init(&draw, f, 0);
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if (r < 0) {
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char buf[128];
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av_strerror(r, buf, sizeof(buf));
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printf("no: %s\n", buf);
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continue;
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}
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ff_draw_color(&draw, &color, (uint8_t[]) { 1, 0, 0, 1 });
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for (i = 0; i < sizeof(color); i++)
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if (((uint8_t *)&color)[i] != 128)
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break;
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if (i == sizeof(color)) {
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printf("fallback color\n");
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continue;
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}
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printf("ok\n");
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}
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return 0;
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}
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#endif
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