1 files changed, 44 insertions, 0 deletions
diff --git a/src/frame_to_pgm.c b/src/frame_to_pgm.c
new file mode 100644
index 0000000..f018099
--- /dev/null
+++ b/src/frame_to_pgm.c
@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "video_decode.h"
+
+static void
+pgm_save(unsigned char *buf, int wrap, int xsize, int ysize, char *filename)
+{
+    FILE *f;
+    int i;
+
+    f = fopen(filename, "w");
+    fprintf(f, "P5\n%d %d\n%d\n", xsize, ysize, 255);
+    for(i=0; i < ysize; i++)
+        fwrite(buf + i * wrap, 1, xsize, f);
+    fclose(f);
+}
+
+int
+main(int argc, char **argv)
+{
+	struct video_decode *vd;
+	struct video_frame *frame;
+	int ret;
+	int64_t timestamp = 0;
+
+	if (argc < 3)
+		return 1;
+
+	if (argc == 4 && strtol(argv[3], NULL, 10) > 0)
+		timestamp = strtol(argv[3], NULL, 10);
+
+	ret = video_decode_init(&vd, argv[1], timestamp);
+	if (ret < 0)
+		return -ret;
+		
+	ret = video_decode_get_frame(vd, &frame);
+	if (ret < 0)
+		return -ret;
+
+	pgm_save(frame->data, frame->stride, frame->width, frame->height,
+		 argv[2]);
+}