diff options
| -rw-r--r-- | libvo/vo_gif89a.c | 573 |
1 files changed, 327 insertions, 246 deletions
diff --git a/libvo/vo_gif89a.c b/libvo/vo_gif89a.c index a7c931a115..2bfa18ec8b 100644 --- a/libvo/vo_gif89a.c +++ b/libvo/vo_gif89a.c @@ -1,314 +1,395 @@ -/* - * vo_gif89a.c Generate gif89a output in file out.gif +/* + MPlayer video driver for animated gif output + + (C) 2002 + + Written by Joey Parrish <joey@nicewarrior.org> + Based on vo_directfb2.c + + This library 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 of the License, or (at your option) any later version. + + This library 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 this library; if not, write to the + Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. +*/ + +/* Notes: + * when setting output framerate, frames will be ignored as needed + * to achieve the desired rate. no frames will be duplicated. + * + * output framerate can be specified as a float + * value now, instead of just an int. * - * Originally based on vo_png.c + * adjustments will be made to both the frame drop cycle and the + * delay per frame to achieve the desired output framerate. * - * Stolen (C) 2002 by GifWhore <joey@yunamusic.com> + * time values are in centiseconds, because that's + * what the gif spec uses for it's delay values. + * + * preinit looks for arguments in one of the following formats (in this order): + * fps:filename -- sets the framerate (float) and output file + * fps -- sets the framerate (float), default file out.gif + * filename -- defaults to 5 fps, sets output file + * (none) -- defaults to 5 fps, output file out.gif * + * trying to put the filename before the framerate will result in the + * entire argument being interpretted as the filename. */ +#include <gif_lib.h> + #include <stdio.h> #include <stdlib.h> #include <string.h> -#include <errno.h> +#include <unistd.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 +#define MPLAYER_VERSION 0.90 +#define VO_GIF_REVISION 3 -static vo_info_t info = -{ - "GIF89a (out.gif)", +static vo_info_t info = { + "animated GIF output", "gif89a", - "GifWhore <joey@yunamusic.com>", + "Joey Parrish joey@nicewarrior.org", "" }; -LIBVO_EXTERN (gif89a) +LIBVO_EXTERN(gif89a) 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; +// how many frames per second we are aiming for during output. +static float target_fps; +// default value for output fps. +static const float default_fps = 5.00; +// the ideal gif delay per frame. +static float ideal_delay; +// the ideal time thus far. +static float ideal_time; +// actual time thus far. +static int real_time; +// nominal framedrop cycle length in frames +static float frame_cycle; +// position in the framedrop cycle +static int cycle_pos; +// adjustment of the framedrop cycle +static float frame_adj; + +// the output width and height +static uint32_t img_width; +static uint32_t img_height; +// image data for slice rendering +static uint8_t *img_data = NULL; +// reduced image data for flip_page +static uint8_t *reduce_data = NULL; +// reduced color map for flip_page +static ColorMapObject *reduce_cmap = NULL; + +// a pointer to the gif structure +static GifFileType *new_gif = NULL; +// a string to contain the filename of the output gif +static char *gif_filename = NULL; +// the default output filename +#define DEFAULT_FILE "out.gif" -GifFileType *newgif=NULL; +static uint32_t preinit(const char *arg) +{ + float fps; + if (verbose) printf("GIF89a: Preinit entered\n"); + + target_fps = 0; + fps = 0; + + if (arg) { + char *temp = NULL; + if (sscanf(arg, "%f", &fps)) { + if (fps < 0) fps = 0; + // find the next argument + temp = strchr(arg, ':'); + if (temp != NULL) temp++; + } else { + // find the first argument + temp = (char *)arg; + } + + if (temp != NULL) { + if (*temp != '\0') { + gif_filename = strdup(temp); + } + } + } -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; + if (fps > vo_fps) + fps = vo_fps; // i will not duplicate frames. + + if (fps <= 0) { + target_fps = default_fps; + if (verbose) + printf("GIF89a: default, %.2f fps\n", target_fps); + } else { + target_fps = fps; + if (verbose) + printf("GIF89a: output fps forced to %.2f\n", target_fps); + } + + ideal_delay = 100 / target_fps; // in centiseconds + frame_cycle = vo_fps / target_fps; + // we make one output frame every (frame_cycle) frames, on average. + + if (gif_filename == NULL) { + gif_filename = strdup(DEFAULT_FILE); + if (verbose) + printf("GIF89a: default, file \"%s\"\n", gif_filename); + } else { + if (verbose) + printf("GIF89a: file forced to \"%s\"\n", gif_filename); + } + + if (verbose) + printf("GIF89a: Preinit OK\n"); + return 0; +} + +static uint32_t config(uint32_t s_width, uint32_t s_height, uint32_t d_width, + uint32_t d_height, uint32_t fullscreen, char *title, + uint32_t format) +{ #ifdef HAVE_GIF_4 - char LB[] = { - 'N','E','T','S', - 'C','A','P','E', - '2','.','0' }; - char LB2[] = { 1, 0x00, 0x00 }; + // these are control blocks for the gif looping extension. + char LB1[] = "NETSCAPE2.0"; + char LB2[] = { 1, 0, 0 }; #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. + if (verbose) { + printf("GIF89a: Config entered [%ix%i]\n",s_width,s_height); + printf("GIF89a: With requested format: %s\n",vo_format_name(format)); + } + + // save these for later. + img_width = s_width; + img_height = s_height; + + // multiple configs without uninit are not allowed. + // this is because config opens a new gif file. + if (vo_config_count > 0) { + if (verbose) + printf("GIF89a: Reconfigure attempted.\n"); + return 0; + } + // but it need not be a fatal error, so return 0. + // multiple configs without uninit will result in two + // movies concatenated in one gif file. the output + // gif will have the dimensions of the first movie. + + switch (format) { + case IMGFMT_RGB24: break; + case IMGFMT_YV12: + yuv2rgb_init(24, MODE_BGR); + img_data = malloc(img_width * img_height * 3); + if (img_data == NULL) { + printf("GIF89a: malloc failed.\n"); + return 1; + } + break; + default: + printf("GIF89a: Error - given unsupported colorspace.\n"); + return 1; + } + + // the EGifSetGifVersion line causes segfaults in certain + // earlier versions of libungif. i don't know exactly which, + // but certainly in all those before v4. if you have problems, + // you need to upgrade your gif library. #ifdef HAVE_GIF_4 - EGifSetGifVersion("89a"); + 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"); + printf("GIF89a: Your version of libungif needs to be upgraded.\n"); + printf("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); + + new_gif = EGifOpenFileName(gif_filename, 0); + if (new_gif == NULL) { + printf("GIF89a: error opening file \"%s\" for output.\n", gif_filename); + return 1; + } + + reduce_data = malloc(img_width * img_height); + if (reduce_data == NULL) { + printf("GIF89a: malloc failed.\n"); + return 1; + } + + reduce_cmap = MakeMapObject(256, NULL); + if (reduce_cmap == NULL) { + printf("GIF89a: malloc failed.\n"); + return 1; + } + + // initialize the delay and framedrop variables. + ideal_time = 0; + real_time = 0; + cycle_pos = 0; + frame_adj = 0; + + // set the initial width and height info. + EGifPutScreenDesc(new_gif, s_width, s_height, 256, 0, reduce_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); + // version 3 of libungif does not support multiple control blocks. + // looping requires multiple control blocks. + // therefore, looping is only enabled for v4 and up. + EGifPutExtensionFirst(new_gif, 0xFF, 11, LB1); + EGifPutExtensionLast(new_gif, 0, 3, LB2); #endif - - return 0; + + if (verbose) + printf("GIF89a: Config finished.\n"); + return 0; } -/* forward declaration */ -int gif_reduce(int width, int height, unsigned char *source, unsigned char *destination, unsigned char *palette); +// we do not draw osd. +void draw_osd() {} -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}; +// we do not handle events. +static void check_events(void) {} - 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); +static int gif_reduce(int width, int height, uint8_t *src, uint8_t *dst, GifColorType *colors) +{ + 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; - return (0); + R = Ra; G = Ga; B = Ba; + for (i = 0; i < width * height; i++) + { + *R++ = *src++; + *G++ = *src++; + *B++ = *src++; + } + + R = Ra; G = Ga; B = Ba; + return QuantizeBuffer(width, height, &size, R, G, B, dst, colors); } -#ifdef USE_OSD -static void draw_alpha(int x0, int y0, int w, int h, unsigned char *src, unsigned char *srca, int stride) +static void flip_page(void) { - vo_draw_alpha_rgb24(w, h, src, srca, stride, image_data + 3 * (y0 * image_width + x0), 3 * image_width); -} -#endif + char CB[4]; // control block + int delay = 0; + int ret; + + cycle_pos++; + if (cycle_pos < frame_cycle - frame_adj) + return; // we are skipping this frame + + // quantize the image + ret = gif_reduce(img_width, img_height, img_data, reduce_data, reduce_cmap->Colors); + if (ret == GIF_ERROR) { + printf("GIF89a: Quantize failed.\n"); + return; + } -static void draw_osd(void) -{ -#ifdef USE_OSD - vo_draw_text(image_width, image_height, draw_alpha); -#endif + // calculate frame delays and frame skipping + ideal_time += ideal_delay; + delay = (int)(ideal_time - real_time); + real_time += delay; + frame_adj += cycle_pos; + frame_adj -= frame_cycle; + cycle_pos = 0; + + // set up the delay control block + CB[0] = (char)(delay >> 8); + CB[1] = (char)(delay & 0xff); + CB[2] = 0; + CB[3] = 0; + + // put the control block with delay info + EGifPutExtension(new_gif, 0xF9, 0x04, CB); + // put the image description + EGifPutImageDesc(new_gif, 0, 0, img_width, img_height, 0, reduce_cmap); + // put the image itself + EGifPutLine(new_gif, reduce_data, img_width * img_height); } -static void flip_page (void) +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 (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); - } + img_data = src[0]; + return 0; } -static uint32_t draw_slice( uint8_t *src[],int stride[],int w,int h,int x,int y ) +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; -} + uint8_t *dst; + + dst = img_data + (img_width * y + x) * 3; + yuv2rgb(dst, src[0], src[1], src[2], w, h, img_width * 3, stride[0], stride[1]); -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; + return 0; } -static void -uninit(void) +static uint32_t query_format(uint32_t format) { - 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); + switch (format) { + case IMGFMT_YV12: + return VFCAP_CSP_SUPPORTED | VFCAP_TIMER | VFCAP_ACCEPT_STRIDE; + case IMGFMT_RGB24: + return VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_TIMER; } + return 0; } - -static void check_events(void) +static uint32_t control(uint32_t request, void *data, ...) { + if (request == VOCTRL_QUERY_FORMAT) { + return query_format(*((uint32_t*)data)); + } + return VO_NOTIMPL; } -int gif_reduce(int width, int height, - unsigned char *source, - unsigned char *destination, - unsigned char *palette) +static void uninit(void) { - 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++; - } + if (verbose) + printf("GIF89a: Uninit entered\n"); - 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); + if (new_gif != NULL) { + char temp[256]; + // comment the gif and close it + snprintf(temp, 256, "MPlayer gif output v%2.2f-%d (c) %s\r\n", + MPLAYER_VERSION, VO_GIF_REVISION, + "joey@nicewarrior.org"); + EGifPutComment(new_gif, temp); + EGifCloseFile(new_gif); // also frees gif storage space. } - for (i = 0; i < Size; i++) - { - *palette++ = cmap[i].Red; - *palette++ = cmap[i].Green; - *palette++ = cmap[i].Blue; - } + // free our allocated ram + if (gif_filename != NULL) free(gif_filename); + if (img_data != NULL) free(img_data); + if (reduce_data != NULL) free(reduce_data); + if (reduce_cmap != NULL) FreeMapObject(reduce_cmap); - return(0); + // set the pointers back to null. + new_gif = NULL; + gif_filename = NULL; + img_data = NULL; + reduce_data = NULL; + reduce_cmap = NULL; } -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; -} |