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-rw-r--r--main.c8
-rw-r--r--media.c57
-rw-r--r--media.h3
3 files changed, 55 insertions, 13 deletions
diff --git a/main.c b/main.c
index b46affe..4bc0d39 100644
--- a/main.c
+++ b/main.c
@@ -229,7 +229,7 @@ static void media_print_topology_dot(struct media_device *media)
continue;
}
- for (j = 0; j < entity->info.links; j++) {
+ for (j = 0; j < entity->num_links; j++) {
struct media_entity_link *link = &entity->links[j];
if (link->source->entity != entity)
@@ -284,7 +284,7 @@ static void media_print_topology_text(struct media_device *media)
printf("\n");
- for (k = 0; k < entity->info.links; k++) {
+ for (k = 0; k < entity->num_links; k++) {
struct media_entity_link *link = &entity->links[k];
if (link->source->entity != entity ||
@@ -383,7 +383,7 @@ static struct media_entity_link *parse_link(struct media_device *media, const ch
*endp = end;
- for (i = 0; i < source->entity->info.links; i++) {
+ for (i = 0; i < source->entity->num_links; i++) {
link = &source->entity->links[i];
if (link->source == source && link->sink == sink)
@@ -691,7 +691,7 @@ static int setup_format(struct media_device *media, const char *p, char **endp)
* the remote subdev input pads, if any.
*/
if (pad->flags & MEDIA_PAD_FLAG_OUTPUT) {
- for (i = 0; i < pad->entity->info.links; ++i) {
+ for (i = 0; i < pad->entity->num_links; ++i) {
struct media_entity_link *link = &pad->entity->links[i];
struct v4l2_mbus_framefmt remote_format;
diff --git a/media.c b/media.c
index 0ec5c16..b88c8c9 100644
--- a/media.c
+++ b/media.c
@@ -44,7 +44,7 @@ struct media_entity_pad *media_entity_remote_source(struct media_entity_pad *pad
if (!(pad->flags & MEDIA_PAD_FLAG_INPUT))
return NULL;
- for (i = 0; i < pad->entity->info.links; ++i) {
+ for (i = 0; i < pad->entity->num_links; ++i) {
struct media_entity_link *link = &pad->entity->links[i];
if (!(link->flags & MEDIA_LINK_FLAG_ACTIVE))
@@ -106,7 +106,7 @@ int media_setup_link(struct media_device *media,
unsigned int i;
int ret;
- for (i = 0; i < source->entity->info.links; i++) {
+ for (i = 0; i < source->entity->num_links; i++) {
link = &source->entity->links[i];
if (link->source->entity == source->entity &&
@@ -116,7 +116,7 @@ int media_setup_link(struct media_device *media,
break;
}
- if (i == source->entity->info.links) {
+ if (i == source->entity->num_links) {
printf("%s: Link not found\n", __func__);
return -EINVAL;
}
@@ -152,10 +152,11 @@ int media_reset_links(struct media_device *media)
for (i = 0; i < media->entities_count; ++i) {
struct media_entity *entity = &media->entities[i];
- for (j = 0; j < entity->info.links; j++) {
+ for (j = 0; j < entity->num_links; j++) {
struct media_entity_link *link = &entity->links[j];
- if (link->flags & MEDIA_LINK_FLAG_IMMUTABLE)
+ if (link->flags & MEDIA_LINK_FLAG_IMMUTABLE ||
+ link->source->entity != entity)
continue;
ret = media_setup_link(media, link->source, link->sink,
@@ -168,6 +169,27 @@ int media_reset_links(struct media_device *media)
return 0;
}
+static struct media_entity_link *media_entity_add_link(struct media_entity *entity)
+{
+ if (entity->num_links >= entity->max_links) {
+ struct media_entity_link *links = entity->links;
+ unsigned int max_links = entity->max_links * 2;
+ unsigned int i;
+
+ links = realloc(links, max_links * sizeof *links);
+ if (links == NULL)
+ return NULL;
+
+ for (i = 0; i < entity->num_links; ++i)
+ links[i].twin->twin = &links[i];
+
+ entity->max_links = max_links;
+ entity->links = links;
+ }
+
+ return &entity->links[entity->num_links++];
+}
+
static int media_enum_links(struct media_device *media)
{
__u32 id;
@@ -198,6 +220,8 @@ static int media_enum_links(struct media_device *media)
for (i = 0; i < entity->info.links; ++i) {
struct media_link_desc *link = &links.links[i];
+ struct media_entity_link *fwdlink;
+ struct media_entity_link *backlink;
struct media_entity *source;
struct media_entity *sink;
@@ -210,9 +234,18 @@ static int media_enum_links(struct media_device *media)
link->sink.entity, link->sink.index);
ret = -EINVAL;
} else {
- entity->links[i].source = &source->pads[link->source.index];
- entity->links[i].sink = &sink->pads[link->sink.index];
- entity->links[i].flags = links.links[i].flags;
+ fwdlink = media_entity_add_link(source);
+ fwdlink->source = &source->pads[link->source.index];
+ fwdlink->sink = &sink->pads[link->sink.index];
+ fwdlink->flags = links.links[i].flags;
+
+ backlink = media_entity_add_link(sink);
+ backlink->source = &source->pads[link->source.index];
+ backlink->sink = &sink->pads[link->sink.index];
+ backlink->flags = links.links[i].flags;
+
+ fwdlink->twin = backlink;
+ backlink->twin = fwdlink;
}
}
@@ -251,8 +284,14 @@ static int media_enum_entities(struct media_device *media)
return -errno;
}
+ /* Number of links (for outbound links) plus number of pads (for
+ * inbound links) is a good safe initial estimate of the total
+ * number of links.
+ */
+ entity->max_links = entity->info.pads + entity->info.links;
+
entity->pads = malloc(entity->info.pads * sizeof(*entity->pads));
- entity->links = malloc(entity->info.links * sizeof(*entity->links));
+ entity->links = malloc(entity->max_links * sizeof(*entity->links));
if (entity->pads == NULL || entity->links == NULL)
return -ENOMEM;
diff --git a/media.h b/media.h
index c94e60e..f299072 100644
--- a/media.h
+++ b/media.h
@@ -25,6 +25,7 @@
struct media_entity_link {
struct media_entity_pad *source;
struct media_entity_pad *sink;
+ struct media_entity_link *twin;
__u32 flags;
};
@@ -38,6 +39,8 @@ struct media_entity {
struct media_entity_desc info;
struct media_entity_pad *pads;
struct media_entity_link *links;
+ unsigned int max_links;
+ unsigned int num_links;
char devname[32];
int fd;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-25 18:47:22 +0000