mirror of
https://github.com/mpv-player/mpv
synced 2024-12-25 16:33:02 +00:00
91cc0d8cf6
c78482045444c488bb7948305d583a55d17cd236 introduced a bool option type as a replacement for the flag type, but didn't actually transition and remove the flag type because it would have been too much mundane work.
347 lines
10 KiB
C
347 lines
10 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv 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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* mpv 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
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* GNU 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 mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <config.h>
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#if HAVE_POSIX
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#include <sys/ioctl.h>
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#endif
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#include <libswscale/swscale.h>
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#include "options/m_config.h"
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#include "config.h"
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#include "osdep/terminal.h"
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#include "osdep/io.h"
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#include "vo.h"
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#include "sub/osd.h"
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#include "video/sws_utils.h"
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#include "video/mp_image.h"
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#define IMGFMT IMGFMT_BGR24
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#define ALGO_PLAIN 1
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#define ALGO_HALF_BLOCKS 2
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#define TERM_ESC_CLEAR_COLORS "\033[0m"
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#define TERM_ESC_COLOR256_BG "\033[48;5"
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#define TERM_ESC_COLOR256_FG "\033[38;5"
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#define TERM_ESC_COLOR24BIT_BG "\033[48;2"
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#define TERM_ESC_COLOR24BIT_FG "\033[38;2"
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#define DEFAULT_WIDTH 80
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#define DEFAULT_HEIGHT 25
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struct vo_tct_opts {
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int algo;
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int width; // 0 -> default
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int height; // 0 -> default
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bool term256; // 0 -> true color
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};
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struct lut_item {
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char str[4];
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int width;
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};
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struct priv {
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struct vo_tct_opts opts;
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size_t buffer_size;
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int swidth;
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int sheight;
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struct mp_image *frame;
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struct mp_rect src;
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struct mp_rect dst;
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struct mp_sws_context *sws;
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struct lut_item lut[256];
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};
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// Convert RGB24 to xterm-256 8-bit value
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// For simplicity, assume RGB space is perceptually uniform.
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// There are 5 places where one of two outputs needs to be chosen when the
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// input is the exact middle:
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// - The r/g/b channels and the gray value: the higher value output is chosen.
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// - If the gray and color have same distance from the input - color is chosen.
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static int rgb_to_x256(uint8_t r, uint8_t g, uint8_t b)
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{
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// Calculate the nearest 0-based color index at 16 .. 231
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# define v2ci(v) (v < 48 ? 0 : v < 115 ? 1 : (v - 35) / 40)
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int ir = v2ci(r), ig = v2ci(g), ib = v2ci(b); // 0..5 each
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# define color_index() (36 * ir + 6 * ig + ib) /* 0..215, lazy evaluation */
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// Calculate the nearest 0-based gray index at 232 .. 255
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int average = (r + g + b) / 3;
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int gray_index = average > 238 ? 23 : (average - 3) / 10; // 0..23
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// Calculate the represented colors back from the index
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static const int i2cv[6] = {0, 0x5f, 0x87, 0xaf, 0xd7, 0xff};
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int cr = i2cv[ir], cg = i2cv[ig], cb = i2cv[ib]; // r/g/b, 0..255 each
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int gv = 8 + 10 * gray_index; // same value for r/g/b, 0..255
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// Return the one which is nearer to the original input rgb value
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# define dist_square(A,B,C, a,b,c) ((A-a)*(A-a) + (B-b)*(B-b) + (C-c)*(C-c))
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int color_err = dist_square(cr, cg, cb, r, g, b);
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int gray_err = dist_square(gv, gv, gv, r, g, b);
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return color_err <= gray_err ? 16 + color_index() : 232 + gray_index;
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}
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static void print_seq3(struct lut_item *lut, const char* prefix,
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uint8_t r, uint8_t g, uint8_t b)
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{
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// The fwrite implementation is about 25% faster than the printf code
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// (even if we use *.s with the lut values), however,
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// on windows we need to use printf in order to translate escape sequences and
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// UTF8 output for the console.
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#ifndef _WIN32
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fputs(prefix, stdout);
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fwrite(lut[r].str, lut[r].width, 1, stdout);
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fwrite(lut[g].str, lut[g].width, 1, stdout);
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fwrite(lut[b].str, lut[b].width, 1, stdout);
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fputc('m', stdout);
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#else
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printf("%s;%d;%d;%dm", prefix, (int)r, (int)g, (int)b);
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#endif
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}
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static void print_seq1(struct lut_item *lut, const char* prefix, uint8_t c)
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{
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#ifndef _WIN32
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fputs(prefix, stdout);
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fwrite(lut[c].str, lut[c].width, 1, stdout);
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fputc('m', stdout);
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#else
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printf("%s;%dm", prefix, (int)c);
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#endif
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}
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static void write_plain(
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const int dwidth, const int dheight,
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const int swidth, const int sheight,
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const unsigned char *source, const int source_stride,
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bool term256, struct lut_item *lut)
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{
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assert(source);
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const int tx = (dwidth - swidth) / 2;
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const int ty = (dheight - sheight) / 2;
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for (int y = 0; y < sheight; y++) {
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const unsigned char *row = source + y * source_stride;
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printf(TERM_ESC_GOTO_YX, ty + y, tx);
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for (int x = 0; x < swidth; x++) {
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unsigned char b = *row++;
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unsigned char g = *row++;
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unsigned char r = *row++;
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if (term256) {
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print_seq1(lut, TERM_ESC_COLOR256_BG, rgb_to_x256(r, g, b));
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} else {
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print_seq3(lut, TERM_ESC_COLOR24BIT_BG, r, g, b);
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}
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printf(" ");
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}
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printf(TERM_ESC_CLEAR_COLORS);
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}
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printf("\n");
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}
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static void write_half_blocks(
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const int dwidth, const int dheight,
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const int swidth, const int sheight,
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unsigned char *source, int source_stride,
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bool term256, struct lut_item *lut)
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{
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assert(source);
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const int tx = (dwidth - swidth) / 2;
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const int ty = (dheight - sheight) / 2;
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for (int y = 0; y < sheight * 2; y += 2) {
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const unsigned char *row_up = source + y * source_stride;
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const unsigned char *row_down = source + (y + 1) * source_stride;
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printf(TERM_ESC_GOTO_YX, ty + y / 2, tx);
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for (int x = 0; x < swidth; x++) {
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unsigned char b_up = *row_up++;
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unsigned char g_up = *row_up++;
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unsigned char r_up = *row_up++;
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unsigned char b_down = *row_down++;
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unsigned char g_down = *row_down++;
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unsigned char r_down = *row_down++;
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if (term256) {
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print_seq1(lut, TERM_ESC_COLOR256_BG, rgb_to_x256(r_up, g_up, b_up));
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print_seq1(lut, TERM_ESC_COLOR256_FG, rgb_to_x256(r_down, g_down, b_down));
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} else {
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print_seq3(lut, TERM_ESC_COLOR24BIT_BG, r_up, g_up, b_up);
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print_seq3(lut, TERM_ESC_COLOR24BIT_FG, r_down, g_down, b_down);
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}
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printf("\xe2\x96\x84"); // UTF8 bytes of U+2584 (lower half block)
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}
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printf(TERM_ESC_CLEAR_COLORS);
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}
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printf("\n");
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}
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static void get_win_size(struct vo *vo, int *out_width, int *out_height) {
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struct priv *p = vo->priv;
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*out_width = DEFAULT_WIDTH;
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*out_height = DEFAULT_HEIGHT;
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terminal_get_size(out_width, out_height);
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if (p->opts.width > 0)
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*out_width = p->opts.width;
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if (p->opts.height > 0)
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*out_height = p->opts.height;
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}
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static int reconfig(struct vo *vo, struct mp_image_params *params)
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{
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struct priv *p = vo->priv;
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get_win_size(vo, &vo->dwidth, &vo->dheight);
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struct mp_osd_res osd;
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vo_get_src_dst_rects(vo, &p->src, &p->dst, &osd);
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p->swidth = p->dst.x1 - p->dst.x0;
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p->sheight = p->dst.y1 - p->dst.y0;
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p->sws->src = *params;
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p->sws->dst = (struct mp_image_params) {
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.imgfmt = IMGFMT,
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.w = p->swidth,
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.h = p->sheight,
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.p_w = 1,
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.p_h = 1,
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};
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const int mul = (p->opts.algo == ALGO_PLAIN ? 1 : 2);
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if (p->frame)
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talloc_free(p->frame);
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p->frame = mp_image_alloc(IMGFMT, p->swidth, p->sheight * mul);
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if (!p->frame)
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return -1;
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if (mp_sws_reinit(p->sws) < 0)
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return -1;
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printf(TERM_ESC_CLEAR_SCREEN);
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vo->want_redraw = true;
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return 0;
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}
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static void draw_image(struct vo *vo, mp_image_t *mpi)
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{
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struct priv *p = vo->priv;
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struct mp_image src = *mpi;
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// XXX: pan, crop etc.
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mp_sws_scale(p->sws, p->frame, &src);
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talloc_free(mpi);
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}
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static void flip_page(struct vo *vo)
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{
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struct priv *p = vo->priv;
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int width, height;
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get_win_size(vo, &width, &height);
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if (vo->dwidth != width || vo->dheight != height)
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reconfig(vo, vo->params);
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if (p->opts.algo == ALGO_PLAIN) {
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write_plain(
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vo->dwidth, vo->dheight, p->swidth, p->sheight,
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p->frame->planes[0], p->frame->stride[0],
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p->opts.term256, p->lut);
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} else {
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write_half_blocks(
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vo->dwidth, vo->dheight, p->swidth, p->sheight,
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p->frame->planes[0], p->frame->stride[0],
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p->opts.term256, p->lut);
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}
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fflush(stdout);
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}
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static void uninit(struct vo *vo)
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{
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printf(TERM_ESC_RESTORE_CURSOR);
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printf(TERM_ESC_NORMAL_SCREEN);
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struct priv *p = vo->priv;
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if (p->frame)
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talloc_free(p->frame);
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}
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static int preinit(struct vo *vo)
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{
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// most terminal characters aren't 1:1, so we default to 2:1.
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// if user passes their own value of choice, it'll be scaled accordingly.
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vo->monitor_par = vo->opts->monitor_pixel_aspect * 2;
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struct priv *p = vo->priv;
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p->sws = mp_sws_alloc(vo);
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p->sws->log = vo->log;
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mp_sws_enable_cmdline_opts(p->sws, vo->global);
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for (int i = 0; i < 256; ++i) {
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char buff[8];
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p->lut[i].width = snprintf(buff, sizeof(buff), ";%d", i);
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memcpy(p->lut[i].str, buff, 4); // some strings may not end on a null byte, but that's ok.
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}
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printf(TERM_ESC_HIDE_CURSOR);
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printf(TERM_ESC_ALT_SCREEN);
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return 0;
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}
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static int query_format(struct vo *vo, int format)
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{
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return format == IMGFMT;
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}
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static int control(struct vo *vo, uint32_t request, void *data)
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{
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return VO_NOTIMPL;
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}
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#define OPT_BASE_STRUCT struct priv
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const struct vo_driver video_out_tct = {
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.name = "tct",
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.description = "true-color terminals",
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.preinit = preinit,
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.query_format = query_format,
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.reconfig = reconfig,
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.control = control,
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.draw_image = draw_image,
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.flip_page = flip_page,
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.uninit = uninit,
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.priv_size = sizeof(struct priv),
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.priv_defaults = &(const struct priv) {
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.opts.algo = ALGO_HALF_BLOCKS,
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},
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.options = (const m_option_t[]) {
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{"algo", OPT_CHOICE(opts.algo,
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{"plain", ALGO_PLAIN},
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{"half-blocks", ALGO_HALF_BLOCKS})},
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{"width", OPT_INT(opts.width)},
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{"height", OPT_INT(opts.height)},
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{"256", OPT_BOOL(opts.term256)},
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{0}
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},
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.options_prefix = "vo-tct",
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};
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