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-rw-r--r--src/main.c809
1 files changed, 809 insertions, 0 deletions
diff --git a/src/main.c b/src/main.c
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index 0000000..aa4ced0
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,809 @@
+/*
+ * 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"
+
+/* -----------------------------------------------------------------------------
+ * Printing
+ */
+
+static struct {
+ const char *name;
+ enum v4l2_mbus_pixelcode code;
+} mbus_formats[] = {
+ { "Y8", V4L2_MBUS_FMT_Y8_1X8},
+ { "YUYV", V4L2_MBUS_FMT_YUYV8_1X16 },
+ { "UYVY", V4L2_MBUS_FMT_UYVY8_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 enum v4l2_mbus_pixelcode string_to_pixelcode(const char *string,
+ unsigned int length)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
+ if (strncmp(mbus_formats[i].name, string, length) == 0)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(mbus_formats))
+ return (enum v4l2_mbus_pixelcode)-1;
+
+ return mbus_formats[i].code;
+}
+
+static void v4l2_subdev_print_format(struct media_entity *entity,
+ unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+ struct v4l2_mbus_framefmt format;
+ struct v4l2_rect rect;
+ int ret;
+
+ ret = v4l2_subdev_get_format(entity, &format, pad, which);
+ if (ret != 0)
+ return;
+
+ printf("[%s %ux%u", pixelcode_to_string(format.code),
+ format.width, format.height);
+
+ ret = v4l2_subdev_get_crop(entity, &rect, pad, which);
+ if (ret == 0)
+ printf(" (%u,%u)/%ux%u", rect.left, rect.top,
+ rect.width, rect.height);
+ printf("]");
+}
+
+static const char *media_entity_type_to_string(unsigned type)
+{
+ static const struct {
+ __u32 type;
+ const char *name;
+ } types[] = {
+ { MEDIA_ENTITY_TYPE_NODE, "Node" },
+ { MEDIA_ENTITY_TYPE_SUBDEV, "V4L2 subdev" },
+ };
+
+ unsigned int i;
+
+ type &= MEDIA_ENTITY_TYPE_MASK;
+
+ for (i = 0; i < ARRAY_SIZE(types); i++) {
+ if (types[i].type == type)
+ return types[i].name;
+ }
+
+ return "Unknown";
+}
+
+static const char *media_entity_subtype_to_string(unsigned type)
+{
+ static const char *node_types[] = {
+ "Unknown",
+ "V4L",
+ "FB",
+ "ALSA",
+ "DVB",
+ };
+ static const char *subdev_types[] = {
+ "Unknown",
+ "Sensor",
+ "Flash",
+ "Lens",
+ };
+
+ unsigned int subtype = type & MEDIA_ENTITY_SUBTYPE_MASK;
+
+ switch (type & MEDIA_ENTITY_TYPE_MASK) {
+ case MEDIA_ENTITY_TYPE_NODE:
+ if (subtype >= ARRAY_SIZE(node_types))
+ subtype = 0;
+ return node_types[subtype];
+
+ case MEDIA_ENTITY_TYPE_SUBDEV:
+ if (subtype >= ARRAY_SIZE(subdev_types))
+ subtype = 0;
+ return subdev_types[subtype];
+ default:
+ return node_types[0];
+ }
+}
+
+static const char *media_pad_type_to_string(unsigned flag)
+{
+ static const struct {
+ __u32 flag;
+ const char *name;
+ } flags[] = {
+ { MEDIA_PAD_FLAG_INPUT, "Input" },
+ { MEDIA_PAD_FLAG_OUTPUT, "Output" },
+ };
+
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(flags); i++) {
+ if (flags[i].flag & flag)
+ return flags[i].name;
+ }
+
+ return "Unknown";
+}
+
+static void media_print_topology_dot(struct media_device *media)
+{
+ unsigned int i, j;
+
+ printf("digraph board {\n");
+ printf("\trankdir=TB\n");
+
+ for (i = 0; i < media->entities_count; ++i) {
+ struct media_entity *entity = &media->entities[i];
+ unsigned int npads;
+
+ switch (media_entity_type(entity)) {
+ case MEDIA_ENTITY_TYPE_NODE:
+ printf("\tn%08x [label=\"%s\\n%s\", shape=box, style=filled, "
+ "fillcolor=yellow]\n",
+ entity->info.id, entity->info.name, entity->devname);
+ break;
+
+ case MEDIA_ENTITY_TYPE_SUBDEV:
+ printf("\tn%08x [label=\"{{", entity->info.id);
+
+ for (j = 0, npads = 0; j < entity->info.pads; ++j) {
+ if (!(entity->pads[j].flags & MEDIA_PAD_FLAG_INPUT))
+ continue;
+
+ printf("%s<port%u> %u", npads ? " | " : "", j, j);
+ npads++;
+ }
+
+ printf("} | %s", entity->info.name);
+ if (entity->devname)
+ printf("\\n%s", entity->devname);
+ printf(" | {");
+
+ for (j = 0, npads = 0; j < entity->info.pads; ++j) {
+ if (!(entity->pads[j].flags & MEDIA_PAD_FLAG_OUTPUT))
+ continue;
+
+ printf("%s<port%u> %u", npads ? " | " : "", j, j);
+ npads++;
+ }
+
+ printf("}}\", shape=Mrecord, style=filled, fillcolor=green]\n");
+ break;
+
+ default:
+ continue;
+ }
+
+ for (j = 0; j < entity->num_links; j++) {
+ struct media_link *link = &entity->links[j];
+
+ if (link->source->entity != entity)
+ continue;
+
+ printf("\tn%08x", link->source->entity->info.id);
+ if (media_entity_type(link->source->entity) == MEDIA_ENTITY_TYPE_SUBDEV)
+ printf(":port%u", link->source->index);
+ printf(" -> ");
+ printf("n%08x", link->sink->entity->info.id);
+ if (media_entity_type(link->sink->entity) == MEDIA_ENTITY_TYPE_SUBDEV)
+ printf(":port%u", link->sink->index);
+
+ if (link->flags & MEDIA_LINK_FLAG_IMMUTABLE)
+ printf(" [style=bold]");
+ else if (!(link->flags & MEDIA_LINK_FLAG_ACTIVE))
+ printf(" [style=dashed]");
+ printf("\n");
+ }
+ }
+
+ printf("}\n");
+}
+
+static void media_print_topology_text(struct media_device *media)
+{
+ unsigned int i, j, k;
+ unsigned int padding;
+
+ printf("Device topology\n");
+
+ for (i = 0; i < media->entities_count; ++i) {
+ struct media_entity *entity = &media->entities[i];
+
+ padding = printf("- entity %u: ", entity->info.id);
+ printf("%s (%u pad%s, %u link%s)\n", entity->info.name,
+ entity->info.pads, entity->info.pads > 1 ? "s" : "",
+ entity->info.links, entity->info.links > 1 ? "s" : "");
+ printf("%*ctype %s subtype %s\n", padding, ' ',
+ media_entity_type_to_string(entity->info.type),
+ media_entity_subtype_to_string(entity->info.type));
+ if (entity->devname[0])
+ printf("%*cdevice node name %s\n", padding, ' ', entity->devname);
+
+ for (j = 0; j < entity->info.pads; j++) {
+ struct media_pad *pad = &entity->pads[j];
+
+ printf("\tpad%u: %s ", j, media_pad_type_to_string(pad->flags));
+
+ if (media_entity_type(entity) == MEDIA_ENTITY_TYPE_SUBDEV)
+ v4l2_subdev_print_format(entity, j, V4L2_SUBDEV_FORMAT_ACTIVE);
+
+ printf("\n");
+
+ for (k = 0; k < entity->num_links; k++) {
+ struct media_link *link = &entity->links[k];
+
+ if (link->source->entity != entity ||
+ link->source->index != j)
+ continue;
+
+ printf("\t\t-> '%s':pad%u [",
+ link->sink->entity->info.name, link->sink->index);
+
+ if (link->flags & MEDIA_LINK_FLAG_IMMUTABLE)
+ printf("IMMUTABLE,");
+ if (link->flags & MEDIA_LINK_FLAG_ACTIVE)
+ printf("ACTIVE");
+
+ printf("]\n");
+ }
+ }
+ printf("\n");
+ }
+}
+
+void media_print_topology(struct media_device *media, int dot)
+{
+ if (dot)
+ media_print_topology_dot(media);
+ else
+ media_print_topology_text(media);
+}
+
+/* -----------------------------------------------------------------------------
+ * Links setup
+ */
+
+static struct media_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;
+
+ ++end;
+ } else {
+ entity_id = strtoul(p, &end, 10);
+ entity = media_get_entity_by_id(media, entity_id);
+ if (entity == NULL)
+ return NULL;
+ }
+ for (; isspace(*end); ++end);
+
+ 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);
+ if (endp)
+ *endp = (char *)p;
+
+ return &entity->pads[pad];
+}
+
+static struct media_link *parse_link(struct media_device *media, const char *p, char **endp)
+{
+ struct media_link *link;
+ struct media_pad *source;
+ struct media_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->num_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_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 int parse_format(struct v4l2_mbus_framefmt *format, const char *p, char **endp)
+{
+ enum v4l2_mbus_pixelcode code;
+ unsigned int width, height;
+ char *end;
+
+ for (; isspace(*p); ++p);
+ for (end = (char *)p; !isspace(*end) && *end != '\0'; ++end);
+
+ code = string_to_pixelcode(p, end - p);
+ if (code == (enum v4l2_mbus_pixelcode)-1)
+ 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;
+
+ memset(format, 0, sizeof(*format));
+ format->width = width;
+ format->height = height;
+ format->code = code;
+
+ return 0;
+}
+
+static int parse_crop(struct v4l2_rect *crop, const char *p, char **endp)
+{
+ char *end;
+
+ if (*p++ != '(')
+ return -EINVAL;
+
+ crop->left = strtoul(p, &end, 10);
+ if (*end != ',')
+ return -EINVAL;
+
+ p = end + 1;
+ crop->top = strtoul(p, &end, 10);
+ if (*end++ != ')')
+ return -EINVAL;
+ if (*end != '/')
+ return -EINVAL;
+
+ p = end + 1;
+ crop->width = strtoul(p, &end, 10);
+ if (*end != 'x')
+ return -EINVAL;
+
+ p = end + 1;
+ crop->height = strtoul(p, &end, 10);
+ *endp = end;
+
+ return 0;
+}
+
+static int parse_frame_interval(struct v4l2_fract *interval, const char *p, char **endp)
+{
+ char *end;
+
+ for (; isspace(*p); ++p);
+
+ interval->numerator = strtoul(p, &end, 10);
+
+ for (p = end; isspace(*p); ++p);
+ if (*p++ != '/')
+ return -EINVAL;
+
+ for (; isspace(*p); ++p);
+ interval->denominator = strtoul(p, &end, 10);
+
+ *endp = end;
+ return 0;
+}
+
+static struct media_pad *parse_pad_format(struct media_device *media,
+ struct v4l2_mbus_framefmt *format, struct v4l2_rect *crop,
+ struct v4l2_fract *interval, const char *p, char **endp)
+{
+ struct media_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;
+
+ for (; isspace(*p); ++p);
+
+ if (isalnum(*p)) {
+ ret = parse_format(format, p, &end);
+ if (ret < 0)
+ return NULL;
+
+ for (p = end; isspace(*p); p++);
+ }
+
+ if (*p == '(') {
+ ret = parse_crop(crop, p, &end);
+ if (ret < 0)
+ return NULL;
+
+ for (p = end; isspace(*p); p++);
+ }
+
+ if (*p == '@') {
+ ret = parse_frame_interval(interval, ++p, &end);
+ if (ret < 0)
+ return NULL;
+
+ for (p = end; isspace(*p); p++);
+ }
+
+ if (*p != ']')
+ return NULL;
+
+ *endp = (char *)p + 1;
+ return pad;
+}
+
+static int set_format(struct media_pad *pad, struct v4l2_mbus_framefmt *format)
+{
+ int ret;
+
+ if (format->width == 0 || format->height == 0)
+ return 0;
+
+ 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 (%d)\n", 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 set_crop(struct media_pad *pad, struct v4l2_rect *crop)
+{
+ int ret;
+
+ if (crop->left == -1 || crop->top == -1)
+ return 0;
+
+ printf("Setting up crop rectangle (%u,%u)/%ux%u on pad %s/%u\n",
+ crop->left, crop->top, crop->width, crop->height,
+ pad->entity->info.name, pad->index);
+
+ ret = v4l2_subdev_set_crop(pad->entity, crop, pad->index,
+ V4L2_SUBDEV_FORMAT_ACTIVE);
+ if (ret < 0) {
+ printf("Unable to set crop rectangle: %s (%d)\n", strerror(-ret), ret);
+ return ret;
+ }
+
+ printf("Crop rectangle set: (%u,%u)/%ux%u\n",
+ crop->left, crop->top, crop->width, crop->height);
+
+ return 0;
+}
+
+static int set_frame_interval(struct media_entity *entity, struct v4l2_fract *interval)
+{
+ int ret;
+
+ if (interval->numerator == 0)
+ return 0;
+
+ printf("Setting up frame interval %u/%u on entity %s\n",
+ interval->numerator, interval->denominator, entity->info.name);
+
+ ret = v4l2_subdev_set_frame_interval(entity, interval);
+ if (ret < 0) {
+ printf("Unable to set frame interval: %s (%d)", strerror(-ret), ret);
+ return ret;
+ }
+
+ printf("Frame interval set: %u/%u\n",
+ interval->numerator, interval->denominator);
+
+ return 0;
+}
+
+
+static int setup_format(struct media_device *media, const char *p, char **endp)
+{
+ struct v4l2_mbus_framefmt format = { 0, 0, 0 };
+ struct media_pad *pad;
+ struct v4l2_rect crop = { -1, -1, -1, -1 };
+ struct v4l2_fract interval = { 0, 0 };
+ unsigned int i;
+ char *end;
+ int ret;
+
+ pad = parse_pad_format(media, &format, &crop, &interval, p, &end);
+ if (pad == NULL) {
+ printf("Unable to parse format\n");
+ return -EINVAL;
+ }
+
+ if (pad->flags & MEDIA_PAD_FLAG_OUTPUT) {
+ ret = set_crop(pad, &crop);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = set_format(pad, &format);
+ if (ret < 0)
+ return ret;
+
+ if (pad->flags & MEDIA_PAD_FLAG_INPUT) {
+ ret = set_crop(pad, &crop);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = set_frame_interval(pad->entity, &interval);
+ if (ret < 0)
+ return ret;
+
+
+ /* If the pad is an output pad, automatically set the same format on
+ * the remote subdev input pads, if any.
+ */
+ if (pad->flags & MEDIA_PAD_FLAG_OUTPUT) {
+ for (i = 0; i < pad->entity->num_links; ++i) {
+ struct media_link *link = &pad->entity->links[i];
+ struct v4l2_mbus_framefmt remote_format;
+
+ if (!(link->flags & MEDIA_LINK_FLAG_ACTIVE))
+ continue;
+
+ if (link->source == pad &&
+ link->sink->entity->info.type == MEDIA_ENTITY_TYPE_SUBDEV) {
+ 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)
+ return ret;
+
+ p = end + 1;
+ } while (*end == ',');
+
+ return *end ? -EINVAL : 0;
+}
+
+int main(int argc, char **argv)
+{
+ struct media_device *media;
+ int ret = -1;
+
+ 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("Entity '%s' not found\n", media_opts.entity);
+ goto out;
+ }
+
+ printf("%s\n", entity->devname);
+ }
+
+ if (media_opts.pad) {
+ struct media_pad *pad;
+
+ pad = parse_pad(media, media_opts.pad, NULL);
+ if (pad == NULL) {
+ printf("Pad '%s' not found\n", media_opts.pad);
+ goto out;
+ }
+
+ v4l2_subdev_print_format(pad->entity, pad->index,
+ V4L2_SUBDEV_FORMAT_ACTIVE);
+ printf("\n");
+ }
+
+ if (media_opts.print || media_opts.print_dot) {
+ media_print_topology(media, media_opts.print_dot);
+ 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);
+ }
+ }
+
+ ret = 0;
+
+out:
+ if (media)
+ media_close(media);
+
+ return ret ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 02:30:19 +0000