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Diffstat (limited to 'ffmpeg1/libavcodec/ansi.c')
-rw-r--r--ffmpeg1/libavcodec/ansi.c473
1 files changed, 0 insertions, 473 deletions
diff --git a/ffmpeg1/libavcodec/ansi.c b/ffmpeg1/libavcodec/ansi.c
deleted file mode 100644
index 93915f8..0000000
--- a/ffmpeg1/libavcodec/ansi.c
+++ /dev/null
@@ -1,473 +0,0 @@
-/*
- * ASCII/ANSI art decoder
- * Copyright (c) 2010 Peter Ross <pross@xvid.org>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * ASCII/ANSI art decoder
- */
-
-#include "libavutil/common.h"
-#include "libavutil/frame.h"
-#include "libavutil/lfg.h"
-#include "libavutil/xga_font_data.h"
-#include "avcodec.h"
-#include "cga_data.h"
-#include "internal.h"
-
-#define ATTR_BOLD 0x01 /**< Bold/Bright-foreground (mode 1) */
-#define ATTR_FAINT 0x02 /**< Faint (mode 2) */
-#define ATTR_UNDERLINE 0x08 /**< Underline (mode 4) */
-#define ATTR_BLINK 0x10 /**< Blink/Bright-background (mode 5) */
-#define ATTR_REVERSE 0x40 /**< Reverse (mode 7) */
-#define ATTR_CONCEALED 0x80 /**< Concealed (mode 8) */
-
-#define DEFAULT_FG_COLOR 7 /**< CGA color index */
-#define DEFAULT_BG_COLOR 0
-#define DEFAULT_SCREEN_MODE 3 /**< 80x25 */
-
-#define FONT_WIDTH 8 /**< Font width */
-
-/** map ansi color index to cga palette index */
-static const uint8_t ansi_to_cga[16] = {
- 0, 4, 2, 6, 1, 5, 3, 7, 8, 12, 10, 14, 9, 13, 11, 15
-};
-
-typedef struct {
- AVFrame *frame;
- int x; /**< x cursor position (pixels) */
- int y; /**< y cursor position (pixels) */
- int sx; /**< saved x cursor position (pixels) */
- int sy; /**< saved y cursor position (pixels) */
- const uint8_t* font; /**< font */
- int font_height; /**< font height */
- int attributes; /**< attribute flags */
- int fg; /**< foreground color */
- int bg; /**< background color */
- int first_frame;
-
- /* ansi parser state machine */
- enum {
- STATE_NORMAL = 0,
- STATE_ESCAPE,
- STATE_CODE,
- STATE_MUSIC_PREAMBLE
- } state;
-#define MAX_NB_ARGS 4
- int args[MAX_NB_ARGS];
- int nb_args; /**< number of arguments (may exceed MAX_NB_ARGS) */
-} AnsiContext;
-
-static av_cold int decode_init(AVCodecContext *avctx)
-{
- AnsiContext *s = avctx->priv_data;
- avctx->pix_fmt = AV_PIX_FMT_PAL8;
-
- s->frame = av_frame_alloc();
- if (!s->frame)
- return AVERROR(ENOMEM);
-
- /* defaults */
- s->font = avpriv_vga16_font;
- s->font_height = 16;
- s->fg = DEFAULT_FG_COLOR;
- s->bg = DEFAULT_BG_COLOR;
-
- if (!avctx->width || !avctx->height)
- avcodec_set_dimensions(avctx, 80<<3, 25<<4);
-
- return 0;
-}
-
-static void set_palette(uint32_t *pal)
-{
- int r, g, b;
- memcpy(pal, ff_cga_palette, 16 * 4);
- pal += 16;
-#define COLOR(x) ((x) * 40 + 55)
- for (r = 0; r < 6; r++)
- for (g = 0; g < 6; g++)
- for (b = 0; b < 6; b++)
- *pal++ = 0xFF000000 | (COLOR(r) << 16) | (COLOR(g) << 8) | COLOR(b);
-#define GRAY(x) ((x) * 10 + 8)
- for (g = 0; g < 24; g++)
- *pal++ = 0xFF000000 | (GRAY(g) << 16) | (GRAY(g) << 8) | GRAY(g);
-}
-
-static void hscroll(AVCodecContext *avctx)
-{
- AnsiContext *s = avctx->priv_data;
- int i;
-
- if (s->y < avctx->height - s->font_height) {
- s->y += s->font_height;
- return;
- }
-
- i = 0;
- for (; i < avctx->height - s->font_height; i++)
- memcpy(s->frame->data[0] + i * s->frame->linesize[0],
- s->frame->data[0] + (i + s->font_height) * s->frame->linesize[0],
- avctx->width);
- for (; i < avctx->height; i++)
- memset(s->frame->data[0] + i * s->frame->linesize[0],
- DEFAULT_BG_COLOR, avctx->width);
-}
-
-static void erase_line(AVCodecContext * avctx, int xoffset, int xlength)
-{
- AnsiContext *s = avctx->priv_data;
- int i;
- for (i = 0; i < s->font_height; i++)
- memset(s->frame->data[0] + (s->y + i)*s->frame->linesize[0] + xoffset,
- DEFAULT_BG_COLOR, xlength);
-}
-
-static void erase_screen(AVCodecContext *avctx)
-{
- AnsiContext *s = avctx->priv_data;
- int i;
- for (i = 0; i < avctx->height; i++)
- memset(s->frame->data[0] + i * s->frame->linesize[0], DEFAULT_BG_COLOR, avctx->width);
- s->x = s->y = 0;
-}
-
-/**
- * Draw character to screen
- */
-static void draw_char(AVCodecContext *avctx, int c)
-{
- AnsiContext *s = avctx->priv_data;
- int fg = s->fg;
- int bg = s->bg;
-
- if ((s->attributes & ATTR_BOLD))
- fg += 8;
- if ((s->attributes & ATTR_BLINK))
- bg += 8;
- if ((s->attributes & ATTR_REVERSE))
- FFSWAP(int, fg, bg);
- if ((s->attributes & ATTR_CONCEALED))
- fg = bg;
- ff_draw_pc_font(s->frame->data[0] + s->y * s->frame->linesize[0] + s->x,
- s->frame->linesize[0], s->font, s->font_height, c, fg, bg);
- s->x += FONT_WIDTH;
- if (s->x >= avctx->width) {
- s->x = 0;
- hscroll(avctx);
- }
-}
-
-/**
- * Execute ANSI escape code
- * @return 0 on success, negative on error
- */
-static int execute_code(AVCodecContext * avctx, int c)
-{
- AnsiContext *s = avctx->priv_data;
- int ret, i, width, height;
- switch(c) {
- case 'A': //Cursor Up
- s->y = FFMAX(s->y - (s->nb_args > 0 ? s->args[0]*s->font_height : s->font_height), 0);
- break;
- case 'B': //Cursor Down
- s->y = FFMIN(s->y + (s->nb_args > 0 ? s->args[0]*s->font_height : s->font_height), avctx->height - s->font_height);
- break;
- case 'C': //Cursor Right
- s->x = FFMIN(s->x + (s->nb_args > 0 ? s->args[0]*FONT_WIDTH : FONT_WIDTH), avctx->width - FONT_WIDTH);
- break;
- case 'D': //Cursor Left
- s->x = FFMAX(s->x - (s->nb_args > 0 ? s->args[0]*FONT_WIDTH : FONT_WIDTH), 0);
- break;
- case 'H': //Cursor Position
- case 'f': //Horizontal and Vertical Position
- s->y = s->nb_args > 0 ? av_clip((s->args[0] - 1)*s->font_height, 0, avctx->height - s->font_height) : 0;
- s->x = s->nb_args > 1 ? av_clip((s->args[1] - 1)*FONT_WIDTH, 0, avctx->width - FONT_WIDTH) : 0;
- break;
- case 'h': //set creen mode
- case 'l': //reset screen mode
- if (s->nb_args < 2)
- s->args[0] = DEFAULT_SCREEN_MODE;
- width = avctx->width;
- height = avctx->height;
- switch(s->args[0]) {
- case 0: case 1: case 4: case 5: case 13: case 19: //320x200 (25 rows)
- s->font = avpriv_cga_font;
- s->font_height = 8;
- width = 40<<3;
- height = 25<<3;
- break;
- case 2: case 3: //640x400 (25 rows)
- s->font = avpriv_vga16_font;
- s->font_height = 16;
- width = 80<<3;
- height = 25<<4;
- break;
- case 6: case 14: //640x200 (25 rows)
- s->font = avpriv_cga_font;
- s->font_height = 8;
- width = 80<<3;
- height = 25<<3;
- break;
- case 7: //set line wrapping
- break;
- case 15: case 16: //640x350 (43 rows)
- s->font = avpriv_cga_font;
- s->font_height = 8;
- width = 80<<3;
- height = 43<<3;
- break;
- case 17: case 18: //640x480 (60 rows)
- s->font = avpriv_cga_font;
- s->font_height = 8;
- width = 80<<3;
- height = 60<<4;
- break;
- default:
- avpriv_request_sample(avctx, "Unsupported screen mode");
- }
- if (width != avctx->width || height != avctx->height) {
- av_frame_unref(s->frame);
- avcodec_set_dimensions(avctx, width, height);
- if ((ret = ff_get_buffer(avctx, s->frame,
- AV_GET_BUFFER_FLAG_REF)) < 0)
- return ret;
- s->frame->pict_type = AV_PICTURE_TYPE_I;
- s->frame->palette_has_changed = 1;
- set_palette((uint32_t *)s->frame->data[1]);
- erase_screen(avctx);
- } else if (c == 'l') {
- erase_screen(avctx);
- }
- break;
- case 'J': //Erase in Page
- switch (s->args[0]) {
- case 0:
- erase_line(avctx, s->x, avctx->width - s->x);
- if (s->y < avctx->height - s->font_height)
- memset(s->frame->data[0] + (s->y + s->font_height)*s->frame->linesize[0],
- DEFAULT_BG_COLOR, (avctx->height - s->y - s->font_height)*s->frame->linesize[0]);
- break;
- case 1:
- erase_line(avctx, 0, s->x);
- if (s->y > 0)
- memset(s->frame->data[0], DEFAULT_BG_COLOR, s->y * s->frame->linesize[0]);
- break;
- case 2:
- erase_screen(avctx);
- }
- break;
- case 'K': //Erase in Line
- switch(s->args[0]) {
- case 0:
- erase_line(avctx, s->x, avctx->width - s->x);
- break;
- case 1:
- erase_line(avctx, 0, s->x);
- break;
- case 2:
- erase_line(avctx, 0, avctx->width);
- }
- break;
- case 'm': //Select Graphics Rendition
- if (s->nb_args == 0) {
- s->nb_args = 1;
- s->args[0] = 0;
- }
- for (i = 0; i < FFMIN(s->nb_args, MAX_NB_ARGS); i++) {
- int m = s->args[i];
- if (m == 0) {
- s->attributes = 0;
- s->fg = DEFAULT_FG_COLOR;
- s->bg = DEFAULT_BG_COLOR;
- } else if (m == 1 || m == 2 || m == 4 || m == 5 || m == 7 || m == 8) {
- s->attributes |= 1 << (m - 1);
- } else if (m >= 30 && m <= 37) {
- s->fg = ansi_to_cga[m - 30];
- } else if (m == 38 && i + 2 < FFMIN(s->nb_args, MAX_NB_ARGS) && s->args[i + 1] == 5 && s->args[i + 2] < 256) {
- int index = s->args[i + 2];
- s->fg = index < 16 ? ansi_to_cga[index] : index;
- i += 2;
- } else if (m == 39) {
- s->fg = ansi_to_cga[DEFAULT_FG_COLOR];
- } else if (m >= 40 && m <= 47) {
- s->bg = ansi_to_cga[m - 40];
- } else if (m == 48 && i + 2 < FFMIN(s->nb_args, MAX_NB_ARGS) && s->args[i + 1] == 5 && s->args[i + 2] < 256) {
- int index = s->args[i + 2];
- s->bg = index < 16 ? ansi_to_cga[index] : index;
- i += 2;
- } else if (m == 49) {
- s->fg = ansi_to_cga[DEFAULT_BG_COLOR];
- } else {
- avpriv_request_sample(avctx, "Unsupported rendition parameter");
- }
- }
- break;
- case 'n': //Device Status Report
- case 'R': //report current line and column
- /* ignore */
- break;
- case 's': //Save Cursor Position
- s->sx = s->x;
- s->sy = s->y;
- break;
- case 'u': //Restore Cursor Position
- s->x = av_clip(s->sx, 0, avctx->width - FONT_WIDTH);
- s->y = av_clip(s->sy, 0, avctx->height - s->font_height);
- break;
- default:
- avpriv_request_sample(avctx, "Unknown escape code");
- break;
- }
- return 0;
-}
-
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
-{
- AnsiContext *s = avctx->priv_data;
- uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- const uint8_t *buf_end = buf+buf_size;
- int ret, i, count;
-
- if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
- return ret;
- if (!avctx->frame_number) {
- for (i=0; i<avctx->height; i++)
- memset(s->frame->data[0]+ i*s->frame->linesize[0], 0, avctx->width);
- memset(s->frame->data[1], 0, AVPALETTE_SIZE);
- }
-
- s->frame->pict_type = AV_PICTURE_TYPE_I;
- s->frame->palette_has_changed = 1;
- set_palette((uint32_t *)s->frame->data[1]);
- if (!s->first_frame) {
- erase_screen(avctx);
- s->first_frame = 1;
- }
-
- while(buf < buf_end) {
- switch(s->state) {
- case STATE_NORMAL:
- switch (buf[0]) {
- case 0x00: //NUL
- case 0x07: //BEL
- case 0x1A: //SUB
- /* ignore */
- break;
- case 0x08: //BS
- s->x = FFMAX(s->x - 1, 0);
- break;
- case 0x09: //HT
- i = s->x / FONT_WIDTH;
- count = ((i + 8) & ~7) - i;
- for (i = 0; i < count; i++)
- draw_char(avctx, ' ');
- break;
- case 0x0A: //LF
- hscroll(avctx);
- case 0x0D: //CR
- s->x = 0;
- break;
- case 0x0C: //FF
- erase_screen(avctx);
- break;
- case 0x1B: //ESC
- s->state = STATE_ESCAPE;
- break;
- default:
- draw_char(avctx, buf[0]);
- }
- break;
- case STATE_ESCAPE:
- if (buf[0] == '[') {
- s->state = STATE_CODE;
- s->nb_args = 0;
- s->args[0] = -1;
- } else {
- s->state = STATE_NORMAL;
- draw_char(avctx, 0x1B);
- continue;
- }
- break;
- case STATE_CODE:
- switch(buf[0]) {
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- if (s->nb_args < MAX_NB_ARGS)
- s->args[s->nb_args] = FFMAX(s->args[s->nb_args], 0) * 10 + buf[0] - '0';
- break;
- case ';':
- s->nb_args++;
- if (s->nb_args < MAX_NB_ARGS)
- s->args[s->nb_args] = 0;
- break;
- case 'M':
- s->state = STATE_MUSIC_PREAMBLE;
- break;
- case '=': case '?':
- /* ignore */
- break;
- default:
- if (s->nb_args > MAX_NB_ARGS)
- av_log(avctx, AV_LOG_WARNING, "args overflow (%i)\n", s->nb_args);
- if (s->nb_args < MAX_NB_ARGS && s->args[s->nb_args] >= 0)
- s->nb_args++;
- if ((ret = execute_code(avctx, buf[0])) < 0)
- return ret;
- s->state = STATE_NORMAL;
- }
- break;
- case STATE_MUSIC_PREAMBLE:
- if (buf[0] == 0x0E || buf[0] == 0x1B)
- s->state = STATE_NORMAL;
- /* ignore music data */
- break;
- }
- buf++;
- }
-
- *got_frame = 1;
- if ((ret = av_frame_ref(data, s->frame)) < 0)
- return ret;
- return buf_size;
-}
-
-static av_cold int decode_close(AVCodecContext *avctx)
-{
- AnsiContext *s = avctx->priv_data;
-
- av_frame_free(&s->frame);
- return 0;
-}
-
-AVCodec ff_ansi_decoder = {
- .name = "ansi",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_ANSI,
- .priv_data_size = sizeof(AnsiContext),
- .init = decode_init,
- .close = decode_close,
- .decode = decode_frame,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("ASCII/ANSI art"),
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 17:43:14 +0000