mpv/libvo/vo_gif89a.c

317 lines
7.2 KiB
C

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