134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
--- dv2jpg.c.orig Sun Jun 24 00:47:02 2001
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+++ dv2jpg.c Sun Feb 23 19:45:30 2003
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@@ -2,6 +2,7 @@
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#include <stdio.h>
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#include <sys/types.h>
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#include <fcntl.h>
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+#include <string.h>
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#include <jpeglib.h>
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#include "avilib.h"
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#include "dvavilib.h"
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@@ -51,10 +52,56 @@
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}
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+void print_usage(void)
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+{
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+ printf ("Usage: dv2jpg [-w width] [-h height] <infile> <outfile>\n"
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+ " By setting the width or height to 0, one can make dv2jpg output\n"
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+ " video in either NTSC or PAL resoultions, whichever was set at compile\n"
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+ " time.\n\n"
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+ " If only one of width or height is given a positive value, and the other\n"
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+ " left unspecified, the video will be scaled so as to keep its original aspect\n"
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+ " ratio.\n");
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+
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+}
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+
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+void parse_command_line (int argc, char **argv, char **infile, char **outfile,
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+ long *width, long *height)
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+{
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+ int cntr;
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+
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+ for (cntr = 1; cntr < argc; cntr++) {
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+ if (strcmp(argv[cntr], "-w") == 0) {
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+ cntr++;
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+ if (cntr == argc || (sscanf (argv[cntr], "%ld", width) != 1)) {
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+ printf ("The -w option needs a valid argument!\n"); exit(1);
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+ }
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+ }
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+ else if (strcmp(argv[cntr], "-h") == 0) {
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+ cntr++;
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+ if (cntr == argc || (sscanf (argv[cntr], "%ld", height) != 1)) {
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+ printf ("The -h option needs a valid argument!\n"); exit(1);
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+ }
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+ }
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+ else if (strcmp(argv[cntr], "--help") == 0) {
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+ print_usage();
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+ exit(0);
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+ }
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+ else {
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+ if (*infile == NULL)
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+ *infile = argv[cntr];
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+ else if (*outfile == NULL)
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+ *outfile = argv[cntr];
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+ else
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+ printf ("Argument %s ignored.\n", argv[cntr]);
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+ }
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+ }
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+}
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+
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int main(int ac,char **av) {
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- char *infile=av[1],*outfile=av[2];
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+ char *infile = NULL,*outfile = NULL;
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long frames,width,height,audiochannels;
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+ long in_width = -1, in_height = -1;
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long audiobits,audioformat,audiorate,audiobytes,audiosamps,audiobps;
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double fps;
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char *compressor;
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@@ -65,14 +112,21 @@
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FILE *aufp;
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long now,left;
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+ parse_command_line (ac, av, &infile, &outfile, &in_width, &in_height);
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+ if (!infile || !outfile) {
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+ print_usage();
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+ exit(1);
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+ }
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- decoder = dv_decoder_new();
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- dv_init();
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+ decoder = dv_decoder_new(0, 0, 0);
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+ dv_init(0, 0);
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decoder->quality = DV_QUALITY_BEST;
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printf("reading %s\n",infile);
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+ inh=DVAVI_open_input_file(infile,1);
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+
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if ((inh=DVAVI_open_input_file(infile,1))==NULL) {
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die("Can't read avi file");
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}
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@@ -83,15 +137,27 @@
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width=DVAVI_video_width(inh);
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height=DVAVI_video_height(inh);
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+ if (in_width == 0 || in_height == 0) {
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#if defined(PAL)
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- width=384;
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- height=288;
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+ width=384;
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+ height=288;
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#elif defined(NTSC)
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- width=352;
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- height=240;
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+ width=352;
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+ height=240;
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#else
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-#error Please define either NTSC or PAL
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+ #error Please define either NTSC or PAL
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#endif
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+ }
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+ else if (in_width * in_height < 0) { /* Only one is positive. */
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+ float ratio = (float)width/(float)height;
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+
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+ if (in_width > 0)
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+ in_height = (int)((float)in_width/ratio);
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+ else
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+ in_width = (int)((float)in_height*ratio);
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+
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+ width = in_width; height = in_height;
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+ }
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fps=DVAVI_frame_rate(inh);
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compressor=DVAVI_video_compressor(inh);
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@@ -136,7 +202,7 @@
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if (dv_parse_header(decoder, inbuf)<0) {
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die("Failed to parse dv image header");
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}
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- dv_decode_full_frame(decoder, inbuf, e_dv_color_rgb, pixels, pitches);
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+ dv_decode_full_frame(decoder, inbuf, e_dv_color_rgb, pixels, (int *)pitches);
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}
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