1 files changed, 65 insertions, 0 deletions
diff --git a/src/blind-split-chans.c b/src/blind-split-chans.c
new file mode 100644
index 0000000..523fb55
--- /dev/null
+++ b/src/blind-split-chans.c
@@ -0,0 +1,65 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+USAGE("X-file Y-file Z-file [alpha-file]")
+
+int
+main(int argc, char *argv[])
+{
+	struct stream stream;
+	char xbuf[BUFSIZ], ybuf[BUFSIZ], zbuf[BUFSIZ], abuf[BUFSIZ];
+	int xfd, yfd, zfd, afd = -1;
+	size_t i, n, ptr;
+
+	UNOFLAGS(argc != 3 && argc != 4);
+
+	eopen_stream(&stream, NULL);
+
+	xfd = eopen(argv[0], O_WRONLY | O_CREAT | O_TRUNC, 0666);
+	yfd = eopen(argv[1], O_WRONLY | O_CREAT | O_TRUNC, 0666);
+	zfd = eopen(argv[2], O_WRONLY | O_CREAT | O_TRUNC, 0666);
+	if (argc == 4)
+		afd = eopen(argv[3], O_WRONLY | O_CREAT | O_TRUNC, 0666);
+
+	if (DPRINTF_HEAD(xfd, stream.frames, stream.width, stream.height, stream.pixfmt) < 0)
+		eprintf("dprintf %s:", argv[0]);
+	if (DPRINTF_HEAD(yfd, stream.frames, stream.width, stream.height, stream.pixfmt) < 0)
+		eprintf("dprintf %s:", argv[1]);
+	if (DPRINTF_HEAD(zfd, stream.frames, stream.width, stream.height, stream.pixfmt) < 0)
+		eprintf("dprintf %s:", argv[2]);
+	if (afd >= 0 && DPRINTF_HEAD(afd, stream.frames, stream.width, stream.height, stream.pixfmt) < 0)
+		eprintf("dprintf %s:", argv[3]);
+
+	n = (stream.n_chan - (afd < 0)) * stream.chan_size;
+	do {
+		for (ptr = 0; ptr + stream.pixel_size <= stream.ptr; ptr += stream.pixel_size) {
+			for (i = 0; i < n; i += stream.chan_size) {
+				memcpy(xbuf + ptr + i, stream.buf + ptr + 0 * stream.chan_size, stream.chan_size);
+				memcpy(ybuf + ptr + i, stream.buf + ptr + 1 * stream.chan_size, stream.chan_size);
+				memcpy(zbuf + ptr + i, stream.buf + ptr + 2 * stream.chan_size, stream.chan_size);
+				if (afd >= 0)
+					memcpy(abuf + ptr + i, stream.buf + ptr + 3 * stream.chan_size, stream.chan_size);
+			}
+			if (afd < 0) {
+				memcpy(xbuf + ptr + n, stream.buf + ptr + 3 * stream.chan_size, stream.chan_size);
+				memcpy(ybuf + ptr + n, stream.buf + ptr + 3 * stream.chan_size, stream.chan_size);
+				memcpy(zbuf + ptr + n, stream.buf + ptr + 3 * stream.chan_size, stream.chan_size);
+			}
+		}
+		ewriteall(xfd, xbuf, ptr, argv[0]);
+		ewriteall(yfd, ybuf, ptr, argv[1]);
+		ewriteall(zfd, zbuf, ptr, argv[2]);
+		if (afd >= 0)
+			ewriteall(afd, abuf, ptr, argv[3]);
+		memmove(stream.buf, stream.buf + ptr, stream.ptr -= ptr);
+	} while (eread_stream(&stream, SIZE_MAX));
+	if (stream.ptr)
+		eprintf("%s: incomplete frame\n", stream.file);
+
+	close(xfd);
+	close(yfd);
+	close(zfd);
+	if (afd >= 0)
+		close(afd);
+	return 0;
+}