From 6bcf1120ccde684a7ab09fd690931ce125fe4631 Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@kth.se>
Date: Thu, 12 Jan 2017 09:40:50 +0100
Subject: Add vu-from-text
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Signed-off-by: Mattias Andrée <maandree@kth.se>
---
 Makefile           |  1 +
 TODO               |  1 -
 src/stream.c       |  2 +-
 src/vu-from-text.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 73 insertions(+), 2 deletions(-)
 create mode 100644 src/vu-from-text.c

diff --git a/Makefile b/Makefile
index f562893..17cb9a7 100644
--- a/Makefile
+++ b/Makefile
@@ -12,6 +12,7 @@ BIN =\
 	vu-flip\
 	vu-flop\
 	vu-from-image\
+	vu-from-text\
 	vu-gauss-blur\
 	vu-invert-luma\
 	vu-next-frame\
diff --git a/TODO b/TODO
index b913861..1b37640 100644
--- a/TODO
+++ b/TODO
@@ -4,7 +4,6 @@ vu-chroma-key		replace a chroma with transparency
 vu-primary-key		replace a primary with transparency, -g for greyscaled images
 vu-from-video		use ffmpeg to convert from another format
 vu-to-video		use ffmpeg to convert to another format
-vu-from-text		convert each pixel from text
 vu-primaries		given three selectable primaries split the video into three side-by-side which
 				only one primary active
 vu-apply-map		remap pixels (distortion) using the X and Y values, -t for tiling, -s for
diff --git a/src/stream.c b/src/stream.c
index 4f20455..edee6a7 100644
--- a/src/stream.c
+++ b/src/stream.c
@@ -17,7 +17,7 @@ eninit_stream(int status, struct stream *stream)
 	size_t n;
 	char *p = NULL, *w, *h, *f, *end;
 
-	for (stream->ptr = 0; p;) {
+	for (stream->ptr = 0; stream->fd >= 0 && p;) {
 		r = read(stream->fd, stream->buf + stream->ptr, sizeof(stream->buf) - stream->ptr);
 		if (r < 0)
 			enprintf(status, "read %s:", stream->file);
diff --git a/src/vu-from-text.c b/src/vu-from-text.c
new file mode 100644
index 0000000..88cee62
--- /dev/null
+++ b/src/vu-from-text.c
@@ -0,0 +1,71 @@
+/* See LICENSE file for copyright and license details. */
+#include "stream.h"
+#include "util.h"
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+
+USAGE("")
+
+static void
+process_xyza(struct stream *stream)
+{
+	double buf[BUFSIZ / sizeof(double)];
+	size_t i;
+	int r, done = 0;
+
+	while (!done) {
+		for (i = 0; i < ELEMENTSOF(buf); i += (size_t)r) {
+			r = scanf("%lf", buf + i);
+			if (r == EOF) {
+				done = 1;
+				break;
+			}
+		}
+		ewriteall(STDOUT_FILENO, buf, i * sizeof(*buf), "<stdout>");
+	}
+}
+
+int
+main(int argc, char *argv[])
+{
+	struct stream stream;
+	size_t size = 0;
+	char *line = NULL;
+	ssize_t len;
+	void (*process)(struct stream *stream) = NULL;
+
+	ENOFLAGS(argc);
+
+	len = getline(&line, &size, stdin);
+	if (len < 0) {
+		if (ferror(stdin))
+	  		eprintf("getline <stdin>:");
+		else
+			eprintf("<stdin>: no input\n");
+	}
+	if (len && line[len - 1] == '\n')
+		line[--len] = '\n';
+	if (len + 6 > sizeof(stream.buf))
+		eprintf("<stdin>: head is too long\n");
+	stream.fd = -1;
+	stream.file = "<stdin>";
+	memcpy(stream.buf, line, (size_t)len);
+	memcpy(stream.buf + len, "\n\0uivf", 6);
+	stream.ptr = (size_t)len + 6;
+	free(line);
+	ewriteall(STDOUT_FILENO, stream.buf, stream.ptr, "<stdout>");
+	einit_stream(&stream);
+
+	if (!strcmp(stream.pixfmt, "xyza"))
+		process = process_xyza;
+	else
+		eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt);
+
+	process(&stream);
+
+	efshut(stdin, "<stdin>");
+	return 0;
+}
-- 
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