mirror of https://github.com/mpv-player/mpv
317 lines
7.2 KiB
C
317 lines
7.2 KiB
C
/*
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* vo_gif89a.c Generate gif89a output in file out.gif
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*
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* Originally based on vo_png.c
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*
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* Stolen (C) 2002 by GifWhore <joey@yunamusic.com>
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "config.h"
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#include "video_out.h"
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#include "video_out_internal.h"
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#include "sub.h"
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#include "../postproc/rgb2rgb.h"
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#include <gif_lib.h>
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#define GIFWHORE_version 0.90
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LIBVO_EXTERN (gif89a)
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static vo_info_t vo_info =
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{
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"GIF89a (out.gif)",
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"gif89a",
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"GifWhore <joey@yunamusic.com>",
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""
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};
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extern int verbose;
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extern int vo_config_count;
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static int image_width;
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static int image_height;
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static int image_format;
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static uint8_t *image_data=NULL;
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static int reverse_map = 0;
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static unsigned char framenum = 0;
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static int gif_frameskip;
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static int gif_framedelay;
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static int target_fps = 0;
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GifFileType *newgif=NULL;
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static uint32_t config
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(uint32_t width, uint32_t height, uint32_t d_width, uint32_t d_height,
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uint32_t fullscreen, char *title, uint32_t format) {
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char filename[] = "out.gif";
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ColorMapObject *Cmap;
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#ifdef HAVE_GIF_4
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char LB[] = {
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'N','E','T','S',
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'C','A','P','E',
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'2','.','0' };
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char LB2[] = { 1, 0x00, 0x00 };
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#endif
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if (target_fps == 0) target_fps = 5;
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gif_frameskip = (vo_fps + 0.25) / target_fps;
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gif_framedelay = 100 / target_fps;
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image_width = width;
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image_height = height;
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image_format = format;
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Cmap = MakeMapObject(256, NULL);
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switch(format) {
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case IMGFMT_BGR24:
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reverse_map = 1;
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break;
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case IMGFMT_RGB24:
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break;
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case IMGFMT_YV12:
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yuv2rgb_init(24, MODE_RGB);
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image_data = malloc(image_width*image_height*3);
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break;
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default:
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return 1;
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}
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if (vo_config_count > 0)
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return 0;
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// this line causes crashes in certain earlier versions of libungif.
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// i don't know exactly which, but certainly all those before v4.
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// if you have problems, you need to upgrade your gif library.
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#ifdef HAVE_GIF_4
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EGifSetGifVersion("89a");
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#else
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fprintf(stderr, "vo_gif89a: Your version of libgif/libungif needs to be upgraded.\n");
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fprintf(stderr, "vo_gif89a: Some functionality has been disabled.\n");
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#endif
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newgif = EGifOpenFileName(filename, 0);
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if (newgif == NULL)
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{
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fprintf(stderr, "error opening file for output.\n");
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return(1);
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}
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EGifPutScreenDesc(newgif, image_width, image_height, 256, 0, Cmap);
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#ifdef HAVE_GIF_4
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// version 3 of libgif/libungif does not support multiple control blocks.
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// for this version, looping will be disabled.
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EGifPutExtensionFirst(newgif, 0xFF, 11, LB);
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EGifPutExtensionLast(newgif, 0, 3, LB2);
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#endif
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return 0;
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}
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static const vo_info_t* get_info(void)
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{
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return &vo_info;
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}
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static uint32_t draw_frame(uint8_t * src[])
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{
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uint8_t *use_data;
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ColorMapObject *Cmap;
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uint8_t Colors[256 * 3];
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int z;
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char CB[] = { (char)(gif_framedelay >> 8), (char)(gif_framedelay & 0xff), 0, 0};
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if ((framenum++ % gif_frameskip)) return(0);
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Cmap = MakeMapObject(256, NULL);
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use_data = (uint8_t *)malloc(image_width * image_height);
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if (gif_reduce(image_width, image_height, src[0], use_data, Colors)) return(0);
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if (reverse_map)
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{
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for (z = 0; z < 256; z++) {
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Cmap->Colors[z].Blue = Colors[(z * 3) + 0];
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Cmap->Colors[z].Green = Colors[(z * 3) + 1];
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Cmap->Colors[z].Red = Colors[(z * 3) + 2];
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}
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}
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else
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{
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for (z = 0; z < 256; z++) {
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Cmap->Colors[z].Red = Colors[(z * 3) + 0];
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Cmap->Colors[z].Green = Colors[(z * 3) + 1];
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Cmap->Colors[z].Blue = Colors[(z * 3) + 2];
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}
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}
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EGifPutExtension(newgif, 0xF9, 0x04, CB);
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EGifPutImageDesc(newgif, 0, 0, image_width, image_height, 0, Cmap);
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EGifPutLine(newgif, use_data, image_width * image_height);
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FreeMapObject(Cmap);
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free(use_data);
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return (0);
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}
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#ifdef USE_OSD
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static void draw_alpha(int x0, int y0, int w, int h, unsigned char *src, unsigned char *srca, int stride)
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{
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vo_draw_alpha_rgb24(w, h, src, srca, stride, image_data + 3 * (y0 * image_width + x0), 3 * image_width);
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}
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#endif
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static void draw_osd(void)
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{
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#ifdef USE_OSD
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vo_draw_text(image_width, image_height, draw_alpha);
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#endif
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}
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static void flip_page (void)
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{
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uint8_t *use_data;
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ColorMapObject *Cmap;
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uint8_t Colors[256 * 3];
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int z;
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char CB[] = { (char)(gif_framedelay >> 8), (char)(gif_framedelay & 0xff), 0, 0};
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if (image_format == IMGFMT_YV12) {
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if ((framenum++ % gif_frameskip)) return;
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Cmap = MakeMapObject(256, NULL);
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use_data = (uint8_t *)malloc(image_width * image_height);
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if (gif_reduce(image_width, image_height, image_data, use_data, Colors)) return;
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if (reverse_map)
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{
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for (z = 0; z < 256; z++) {
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Cmap->Colors[z].Blue = Colors[(z * 3) + 0];
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Cmap->Colors[z].Green = Colors[(z * 3) + 1];
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Cmap->Colors[z].Red = Colors[(z * 3) + 2];
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}
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}
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else
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{
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for (z = 0; z < 256; z++) {
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Cmap->Colors[z].Red = Colors[(z * 3) + 0];
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Cmap->Colors[z].Green = Colors[(z * 3) + 1];
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Cmap->Colors[z].Blue = Colors[(z * 3) + 2];
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}
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}
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EGifPutExtension(newgif, 0xF9, 0x04, CB);
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EGifPutImageDesc(newgif, 0, 0, image_width, image_height, 0, Cmap);
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EGifPutLine(newgif, use_data, image_width * image_height);
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FreeMapObject(Cmap);
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free(use_data);
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}
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}
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static uint32_t draw_slice( uint8_t *src[],int stride[],int w,int h,int x,int y )
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{
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uint8_t *dst = image_data + (image_width * y + x) * 3;
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yuv2rgb(dst,src[0],src[1],src[2],w,h,image_width*3,stride[0],stride[1]);
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return 0;
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}
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static uint32_t
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query_format(uint32_t format)
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{
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switch(format){
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case IMGFMT_YV12:
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return VFCAP_CSP_SUPPORTED | VFCAP_TIMER | VFCAP_ACCEPT_STRIDE;
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case IMGFMT_RGB|24:
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case IMGFMT_BGR|24:
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return VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_OSD | VFCAP_TIMER;
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}
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return 0;
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}
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static void
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uninit(void)
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{
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char temp[256];
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if (image_data) { free(image_data); image_data=NULL; }
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if (vo_config_count > 0) {
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sprintf(temp, "gifwhore v%2.2f (c) %s\r\n",
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GIFWHORE_version, "joey@yunamusic.com");
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EGifPutComment(newgif, temp);
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EGifCloseFile(newgif);
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}
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}
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static void check_events(void)
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{
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}
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int gif_reduce(int width, int height,
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unsigned char *source,
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unsigned char *destination,
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unsigned char *palette)
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{
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GifColorType cmap[256];
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unsigned char Ra[width * height];
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unsigned char Ga[width * height];
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unsigned char Ba[width * height];
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unsigned char *R, *G, *B;
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int Size = 256;
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int i;
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R = Ra; G = Ga; B = Ba;
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for (i = 0; i < width * height; i++)
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{
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*R++ = *source++;
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*G++ = *source++;
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*B++ = *source++;
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}
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R = Ra; G = Ga; B = Ba;
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if (QuantizeBuffer(width, height, &Size,
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R, G, B,
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destination, cmap) == GIF_ERROR)
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{
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fprintf(stderr, "vo_gif89a: Quantize failed!\n");
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return(-1);
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}
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for (i = 0; i < Size; i++)
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{
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*palette++ = cmap[i].Red;
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*palette++ = cmap[i].Green;
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*palette++ = cmap[i].Blue;
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}
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return(0);
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}
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static uint32_t preinit(const char *arg)
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{
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int i = 0;
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if (arg) i = atoi(arg);
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if (i > vo_fps) i = vo_fps;
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if (i < 1) i = 5;
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target_fps = i;
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return 0;
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}
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static uint32_t control(uint32_t request, void *data, ...)
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{
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switch (request) {
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case VOCTRL_QUERY_FORMAT:
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return query_format(*((uint32_t*)data));
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}
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return VO_NOTIMPL;
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}
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