Initial import

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 402 insertions, 0 deletions

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..ab76c84
--- /dev/null
+++ b/main.c
@@ -0,0 +1,402 @@
+/*
+ * Media controller test application
+ *
+ * Copyright (C) 2010 Ideas on board SPRL <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ */
+
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <linux/types.h>
+#include <linux/media.h>
+#include <linux/v4l2-mediabus.h>
+#include <linux/v4l2-subdev.h>
+#include <linux/videodev2.h>
+
+#include "media.h"
+#include "options.h"
+#include "subdev.h"
+#include "tools.h"
+
+/* -----------------------------------------------------------------------------
+ * Links setup
+ */
+
+static struct media_entity_pad *parse_pad(struct media_device *media, const char *p, char **endp)
+{
+	unsigned int entity_id, pad;
+	struct media_entity *entity;
+	char *end;
+
+	for (; isspace(*p); ++p);
+
+	if (*p == '"') {
+		for (end = (char *)p + 1; *end && *end != '"'; ++end);
+		if (*end != '"')
+			return NULL;
+
+		entity = media_get_entity_by_name(media, p + 1, end - p - 1);
+		if (entity == NULL)
+			return NULL;
+
+		for (++end; isspace(*end); ++end);
+	} else {
+		entity_id = strtoul(p, &end, 10) - 1;
+		if (entity_id >= media->entities_count)
+			return NULL;
+
+		entity = &media->entities[entity_id];
+	}
+
+	if (*end != ':')
+		return NULL;
+	for (p = end + 1; isspace(*p); ++p);
+
+	pad = strtoul(p, &end, 10);
+	for (p = end; isspace(*p); ++p);
+
+	if (pad >= entity->info.pads)
+		return NULL;
+
+	for (p = end; isspace(*p); ++p);
+	*endp = (char *)p;
+
+	return &entity->pads[pad];
+}
+
+static struct media_entity_link *parse_link(struct media_device *media, const char *p, char **endp)
+{
+	struct media_entity_link *link;
+	struct media_entity_pad *source;
+	struct media_entity_pad *sink;
+	unsigned int i;
+	char *end;
+
+	source = parse_pad(media, p, &end);
+	if (source == NULL)
+		return NULL;
+
+	if (end[0] != '-' || end[1] != '>')
+		return NULL;
+	p = end + 2;
+
+	sink = parse_pad(media, p, &end);
+	if (sink == NULL)
+		return NULL;
+
+	*endp = end;
+
+	for (i = 0; i < source->entity->info.links; i++) {
+		link = &source->entity->links[i];
+
+		if (link->source == source && link->sink == sink)
+			return link;
+	}
+
+	return NULL;
+}
+
+static int setup_link(struct media_device *media, const char *p, char **endp)
+{
+	struct media_entity_link *link;
+	__u32 flags;
+	char *end;
+
+	link = parse_link(media, p, &end);
+	if (link == NULL) {
+		printf("Unable to parse link\n");
+		return -EINVAL;
+	}
+
+	p = end;
+	if (*p++ != '[') {
+		printf("Unable to parse link flags\n");
+		return -EINVAL;
+	}
+
+	flags = strtoul(p, &end, 10);
+	for (p = end; isspace(*p); p++);
+	if (*p++ != ']') {
+		printf("Unable to parse link flags\n");
+		return -EINVAL;
+	}
+
+	for (; isspace(*p); p++);
+	*endp = (char *)p;
+
+	printf("Setting up link %u:%u -> %u:%u [%u]\n",
+		link->source->entity->info.id, link->source->index,
+		link->sink->entity->info.id, link->sink->index,
+		flags);
+
+	return media_setup_link(media, link->source, link->sink, flags);
+}
+
+static int setup_links(struct media_device *media, const char *p)
+{
+	char *end;
+	int ret;
+
+	do {
+		ret = setup_link(media, p, &end);
+		if (ret < 0)
+			return ret;
+
+		p = end + 1;
+	} while (*end == ',');
+
+	return *end ? -EINVAL : 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Formats setup
+ */
+
+static struct {
+	const char *name;
+	enum v4l2_mbus_pixelcode code;
+} mbus_formats[] = {
+	{ "YUYV", V4L2_MBUS_FMT_YUYV16_1X16 },
+	{ "UYVY", V4L2_MBUS_FMT_UYVY16_1X16 },
+	{ "SGRBG10", V4L2_MBUS_FMT_SGRBG10_1X10 },
+	{ "SGRBG10_DPCM8", V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8 },
+};
+
+static const char *pixelcode_to_string(enum v4l2_mbus_pixelcode code)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
+		if (mbus_formats[i].code == code)
+			return mbus_formats[i].name;
+	}
+
+	return "unknown";
+}
+
+static int parse_format(struct v4l2_mbus_framefmt *format, const char *p, char **endp)
+{
+	unsigned int width, height;
+	unsigned int i;
+	char *end;
+
+	for (; isspace(*p); ++p);
+	for (end = (char *)p; !isspace(*end) && *end != '\0'; ++end);
+
+	for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
+		if (strncmp(mbus_formats[i].name, p, end - p) == 0)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(mbus_formats))
+		return -EINVAL;
+
+	for (p = end; isspace(*p); ++p);
+	width = strtoul(p, &end, 10);
+	if (*end != 'x')
+		return -EINVAL;
+
+	p = end + 1;
+	height = strtoul(p, &end, 10);
+	*endp = end;
+
+	format->width = width;
+	format->height = height;
+	format->code = mbus_formats[i].code;
+
+	return 0;
+}
+
+static struct media_entity_pad *parse_pad_format(struct media_device *media,
+	struct v4l2_mbus_framefmt *format, const char *p, char **endp)
+{
+	struct media_entity_pad *pad;
+	char *end;
+	int ret;
+
+	for (; isspace(*p); ++p);
+
+	pad = parse_pad(media, p, &end);
+	if (pad == NULL)
+		return NULL;
+
+	for (p = end; isspace(*p); ++p);
+	if (*p++ != '[')
+		return NULL;
+
+	ret = parse_format(format, p, &end);
+	if (ret < 0)
+		return NULL;
+
+	for (p = end; isspace(*p); p++);
+	if (*p++ != ']')
+		return NULL;
+
+	*endp = (char *)p;
+	return pad;
+}
+
+static int set_format(struct media_entity_pad *pad, struct v4l2_mbus_framefmt *format)
+{
+	int ret;
+
+	printf("Setting up format %s %ux%u on pad %s/%u\n",
+		pixelcode_to_string(format->code), format->width, format->height,
+		pad->entity->info.name, pad->index);
+
+	ret = v4l2_subdev_set_format(pad->entity, format, pad->index,
+				     V4L2_SUBDEV_FORMAT_ACTIVE);
+	if (ret < 0) {
+		printf("Unable to set format: %s(%u)", strerror(ret), ret);
+		return ret;
+	}
+
+	printf("Format set: %s %ux%u\n",
+		pixelcode_to_string(format->code), format->width, format->height);
+
+	return 0;
+}
+
+static int setup_format(struct media_device *media, const char *p, char **endp)
+{
+	struct v4l2_mbus_framefmt format;
+	struct media_entity_pad *pad;
+	unsigned int i;
+	char *end;
+	int ret;
+
+	pad = parse_pad_format(media, &format, p, &end);
+	if (pad == NULL) {
+		printf("Unable to parse format\n");
+		return -EINVAL;
+	}
+
+	ret = set_format(pad, &format);
+	if (ret < 0)
+		return ret;
+
+	/* If the pad is an output pad, automatically set the same format on
+	 * the remote inputs, if any.
+	 */
+	if (pad->type == MEDIA_PAD_TYPE_OUTPUT) {
+		for (i = 0; i < pad->entity->info.links; ++i) {
+			struct media_entity_link *link = &pad->entity->links[i];
+			struct v4l2_mbus_framefmt remote_format;
+
+			if (!(link->flags & MEDIA_LINK_FLAG_ACTIVE))
+				continue;
+
+			if (link->source == pad) {
+				remote_format = format;
+				set_format(link->sink, &remote_format);
+			}
+		}
+	}
+
+	*endp = end;
+	return 0;
+}
+
+static int setup_formats(struct media_device *media, const char *p)
+{
+	char *end;
+	int ret;
+
+	do {
+		ret = setup_format(media, p, &end);
+		if (ret < 0) {
+			printf("Unable to parse format\n");
+			return ret;
+		}
+
+		p = end + 1;
+	} while (*end == ',');
+
+	return *end ? -EINVAL : 0;
+}
+
+int main(int argc, char **argv)
+{
+	struct media_device *media;
+
+	if (parse_cmdline(argc, argv))
+		return EXIT_FAILURE;
+
+	/* Open the media device and enumerate entities, pads and links. */
+	media = media_open(media_opts.devname, media_opts.verbose);
+	if (media == NULL)
+		goto out;
+
+	if (media_opts.entity) {
+		struct media_entity *entity;
+
+		entity = media_get_entity_by_name(media, media_opts.entity,
+						  strlen(media_opts.entity));
+		if (entity != NULL)
+			printf("%s\n", entity->devname);
+		else
+			printf("Entity '%s' not found\n", media_opts.entity);
+	}
+
+	if (media_opts.print) {
+		media_print_topology(media);
+		printf("\n");
+	}
+
+	if (media_opts.reset) {
+		printf("Resetting all links to inactive\n");
+		media_reset_links(media);
+	}
+
+	if (media_opts.links)
+		setup_links(media, media_opts.links);
+
+	if (media_opts.formats)
+		setup_formats(media, media_opts.formats);
+
+	if (media_opts.interactive) {
+		while (1) {
+			char buffer[32];
+			char *end;
+
+			printf("Enter a link to modify or enter to stop\n");
+			if (fgets(buffer, sizeof buffer, stdin) == NULL)
+				break;
+
+			if (buffer[0] == '\n')
+				break;
+
+			setup_link(media, buffer, &end);
+		}
+	}
+
+out:
+	if (media)
+		media_close(media);
+
+	exit(EXIT_SUCCESS);
+}
+