Add debugging handler to media_device that may be used to redirect all debug
formatting to user-supplied function. fprintf will do, and that's what
media-ctl test program will use.
Signed-off-by: Sakari Ailus <sakari.ai...@iki.fi>
---
src/main.c | 3 +-
src/mediactl.c | 105 +++++++++++++++++++++++++++++++++---------------------
src/mediactl.h | 41 +++++++++++++++++++++
src/v4l2subdev.c | 57 ++++++++++++++++++-----------
4 files changed, 142 insertions(+), 64 deletions(-)
diff --git a/src/main.c b/src/main.c
index 0d68ff6..40ab13e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -288,7 +288,8 @@ int main(int argc, char **argv)
return EXIT_FAILURE;
/* Open the media device and enumerate entities, pads and links. */
- media = media_open(media_opts.devname, media_opts.verbose);
+ media = media_open_debug(media_opts.devname, media_opts.verbose,
+ (void (*)(void *, ...))fprintf, stdout);
if (media == NULL)
goto out;
diff --git a/src/mediactl.c b/src/mediactl.c
index 8cc338d..43d1b6a 100644
--- a/src/mediactl.c
+++ b/src/mediactl.c
@@ -36,12 +36,6 @@
#include "mediactl.h"
#include "tools.h"
-#ifdef DEBUG
-#define dprintf(...) printf(__VA_ARGS__)
-#else
-#define dprintf(...)
-#endif
-
struct media_pad *media_entity_remote_source(struct media_pad *pad)
{
unsigned int i;
@@ -113,7 +107,7 @@ int media_setup_link(struct media_device *media,
}
if (i == source->entity->num_links) {
- dprintf("%s: Link not found\n", __func__);
+ media_dbg(media, "%s: Link not found\n", __func__);
return -ENOENT;
}
@@ -131,8 +125,8 @@ int media_setup_link(struct media_device *media,
ret = ioctl(media->fd, MEDIA_IOC_SETUP_LINK, &ulink);
if (ret == -1) {
- dprintf("%s: Unable to setup link (%s)\n", __func__,
- strerror(errno));
+ media_dbg(media, "%s: Unable to setup link (%s)\n",
+ __func__, strerror(errno));
return -errno;
}
@@ -202,8 +196,9 @@ static int media_enum_links(struct media_device *media)
links.links = malloc(entity->info.links * sizeof(struct
media_link_desc));
if (ioctl(media->fd, MEDIA_IOC_ENUM_LINKS, &links) < 0) {
- dprintf("%s: Unable to enumerate pads and links
(%s).\n",
- __func__, strerror(errno));
+ media_dbg(media,
+ "%s: Unable to enumerate pads and links
(%s).\n",
+ __func__, strerror(errno));
free(links.pads);
free(links.links);
return -errno;
@@ -226,9 +221,12 @@ static int media_enum_links(struct media_device *media)
sink = media_get_entity_by_id(media, link->sink.entity);
if (source == NULL || sink == NULL) {
- dprintf("WARNING entity %u link %u from %u/%u
to %u/%u is invalid!\n",
- id, i, link->source.entity,
link->source.index,
- link->sink.entity, link->sink.index);
+ media_dbg(media,
+ "WARNING entity %u link %u from %u/%u
to %u/%u is invalid!\n",
+ id, i, link->source.entity,
+ link->source.index,
+ link->sink.entity,
+ link->sink.index);
ret = -EINVAL;
} else {
fwdlink = media_entity_add_link(source);
@@ -284,7 +282,8 @@ static int media_get_devname_udev(struct udev *udev,
devnum = makedev(entity->info.v4l.major, entity->info.v4l.minor);
if (verbose)
- printf("looking up device: %u:%u\n", major(devnum),
minor(devnum));
+ media_dbg(entity->media, "looking up device: %u:%u\n",
+ major(devnum), minor(devnum));
device = udev_device_new_from_devnum(udev, 'c', devnum);
if (device) {
p = udev_device_get_devnode(device);
@@ -362,7 +361,7 @@ static int media_enum_entities(struct media_device *media,
int verbose)
ret = media_udev_open(&udev);
if (ret < 0)
- printf("%s: Can't get udev context\n", __func__);
+ media_dbg(media, "Can't get udev context\n");
for (id = 0, ret = 0; ; id = entity->info.id) {
size = (media->entities_count + 1) * sizeof(*media->entities);
@@ -412,48 +411,66 @@ static int media_enum_entities(struct media_device
*media, int verbose)
return ret;
}
-struct media_device *media_open(const char *name, int verbose)
+static void media_debug_default(void *ptr, ...)
+{
+}
+
+void media_debug_set_handler(struct media_device *media,
+ void (*debug_handler)(void *, ...),
+ void *debug_priv)
+{
+ if (debug_handler) {
+ media->debug_handler = debug_handler;
+ media->debug_priv = debug_priv;
+ } else {
+ media->debug_handler = media_debug_default;
+ media->debug_priv = NULL;
+ }
+}
+
+struct media_device *media_open_debug(
+ const char *name, int verbose, void (*debug_handler)(void *, ...),
+ void *debug_priv)
{
struct media_device *media;
int ret;
media = calloc(1, sizeof(*media));
- if (media == NULL) {
- dprintf("%s: unable to allocate memory\n", __func__);
+ if (media == NULL)
return NULL;
- }
- if (verbose)
- dprintf("Opening media device %s\n", name);
+ media_debug_set_handler(media, debug_handler, debug_priv);
+
+ media_dbg(media, "Opening media device %s\n", name);
media->fd = open(name, O_RDWR);
if (media->fd < 0) {
media_close(media);
- dprintf("%s: Can't open media device %s\n", __func__, name);
+ media_dbg(media, "%s: Can't open media device %s\n",
+ __func__, name);
return NULL;
}
- if (verbose)
- dprintf("Enumerating entities\n");
+ media_dbg(media, "Enumerating entities\n");
ret = media_enum_entities(media, verbose);
if (ret < 0) {
- dprintf("%s: Unable to enumerate entities for device %s (%s)\n",
- __func__, name, strerror(-ret));
+ media_dbg(media,
+ "%s: Unable to enumerate entities for device %s
(%s)\n",
+ __func__, name, strerror(-ret));
media_close(media);
return NULL;
}
- if (verbose) {
- dprintf("Found %u entities\n", media->entities_count);
- dprintf("Enumerating pads and links\n");
- }
+ media_dbg(media, "Found %u entities\n", media->entities_count);
+ media_dbg(media, "Enumerating pads and links\n");
ret = media_enum_links(media);
if (ret < 0) {
- dprintf("%s: Unable to enumerate pads and linksfor device %s\n",
- __func__, name);
+ media_dbg(media,
+ "%s: Unable to enumerate pads and linksfor device
%s\n",
+ __func__, name);
media_close(media);
return NULL;
}
@@ -461,6 +478,11 @@ struct media_device *media_open(const char *name, int
verbose)
return media;
}
+struct media_device *media_open(const char *name, int verbose)
+{
+ return media_open_debug(name, verbose, NULL, NULL);
+}
+
void media_close(struct media_device *media)
{
unsigned int i;
@@ -567,30 +589,32 @@ int media_parse_setup_link(struct media_device *media,
link = media_parse_link(media, p, &end);
if (link == NULL) {
- dprintf("Unable to parse link\n");
+ media_dbg(media,
+ "%s: Unable to parse link\n", __func__);
return -EINVAL;
}
p = end;
if (*p++ != '[') {
- dprintf("Unable to parse link flags\n");
+ media_dbg(media, "Unable to parse link flags\n");
return -EINVAL;
}
flags = strtoul(p, &end, 10);
for (p = end; isspace(*p); p++);
if (*p++ != ']') {
- dprintf("Unable to parse link flags\n");
+ media_dbg(media, "Unable to parse link flags\n");
return -EINVAL;
}
for (; isspace(*p); p++);
*endp = (char *)p;
- dprintf("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);
+ media_dbg(media,
+ "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);
}
@@ -610,4 +634,3 @@ int media_parse_setup_links(struct media_device *media,
const char *p)
return *end ? -EINVAL : 0;
}
-
diff --git a/src/mediactl.h b/src/mediactl.h
index 98b47fd..c6bf723 100644
--- a/src/mediactl.h
+++ b/src/mediactl.h
@@ -54,9 +54,50 @@ struct media_device {
int fd;
struct media_entity *entities;
unsigned int entities_count;
+ void (*debug_handler)(void *, ...);
+ void *debug_priv;
__u32 padding[6];
};
+#define media_dbg(media, ...) \
+ (media)->debug_handler((media)->debug_priv, __VA_ARGS__)
+
+/**
+ * @brief Set a handler for debug messages.
+ * @param media - device instance.
+ * @param debug_handler - debug message handler
+ * @param debug_priv - first argument to debug message handler
+ *
+ * Set a handler for debug messages that will be called whenever
+ * debugging information is to be printed. The handler expects an
+ * fprintf-like function.
+ */
+void media_debug_set_handler(
+ struct media_device *media, void (*debug_handler)(void *, ...),
+ void *debug_priv);
+
+/**
+ * @brief Open a media device with debugging enabled.
+ * @param name - name (including path) of the device node.
+ * @param verbose - whether to print verbose information on the standard
output.
+ * @param debug_handler - debug message handler
+ * @param debug_priv - first argument to debug message handler
+ *
+ * Open the media device referenced by @a name and enumerate entities, pads and
+ * links.
+ *
+ * Calling media_open_debug() instead of media_open() is equivalent to
+ * media_open() and media_debug_set_handler() except that debugging is
+ * also enabled during media_open().
+ *
+ * @return A pointer to a newly allocated media_device structure instance on
+ * success and NULL on failure. The returned pointer must be freed with
+ * media_close when the device isn't needed anymore.
+ */
+struct media_device *media_open_debug(
+ const char *name, int verbose, void (*debug_handler)(void *, ...),
+ void *debug_priv);
+
/**
* @brief Open a media device.
* @param name - name (including path) of the device node.
diff --git a/src/v4l2subdev.c b/src/v4l2subdev.c
index 80365e6..5759948 100644
--- a/src/v4l2subdev.c
+++ b/src/v4l2subdev.c
@@ -40,8 +40,9 @@ int v4l2_subdev_open(struct media_entity *entity)
entity->fd = open(entity->devname, O_RDWR);
if (entity->fd == -1) {
- printf("%s: Failed to open subdev device node %s\n", __func__,
- entity->devname);
+ media_dbg(entity->media,
+ "%s: Failed to open subdev device node %s\n",
__func__,
+ entity->devname);
return -errno;
}
@@ -329,21 +330,25 @@ static int set_format(struct media_pad *pad,
if (format->width == 0 || format->height == 0)
return 0;
- printf("Setting up format %s %ux%u on pad %s/%u\n",
- v4l2_subdev_pixelcode_to_string(format->code),
- format->width, format->height,
- pad->entity->info.name, pad->index);
+ media_dbg(pad->entity->media,
+ "Setting up format %s %ux%u on pad %s/%u\n",
+ v4l2_subdev_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);
+ media_dbg(pad->entity->media,
+ "Unable to set format: %s (%d)\n",
+ strerror(-ret), ret);
return ret;
}
- printf("Format set: %s %ux%u\n",
- v4l2_subdev_pixelcode_to_string(format->code),
- format->width, format->height);
+ media_dbg(pad->entity->media,
+ "Format set: %s %ux%u\n",
+ v4l2_subdev_pixelcode_to_string(format->code),
+ format->width, format->height);
return 0;
}
@@ -355,19 +360,23 @@ static int set_crop(struct media_pad *pad, struct
v4l2_rect *crop)
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);
+ media_dbg(pad->entity->media,
+ "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);
+ media_dbg(pad->entity->media,
+ "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);
+ media_dbg(pad->entity->media,
+ "Crop rectangle set: (%u,%u)/%ux%u\n",
+ crop->left, crop->top, crop->width, crop->height);
return 0;
}
@@ -380,17 +389,21 @@ static int set_frame_interval(struct media_entity *entity,
if (interval->numerator == 0)
return 0;
- printf("Setting up frame interval %u/%u on entity %s\n",
- interval->numerator, interval->denominator, entity->info.name);
+ media_dbg(entity->media,
+ "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);
+ media_dbg(entity->media,
+ "Unable to set frame interval: %s (%d)",
+ strerror(-ret), ret);
return ret;
}
- printf("Frame interval set: %u/%u\n",
- interval->numerator, interval->denominator);
+ media_dbg(entity->media, "Frame interval set: %u/%u\n",
+ interval->numerator, interval->denominator);
return 0;
}
@@ -410,7 +423,7 @@ static int v4l2_subdev_parse_setup_format(struct
media_device *media,
pad = v4l2_subdev_parse_pad_format(media, &format, &crop, &interval,
p, &end);
if (pad == NULL) {
- printf("Unable to parse format\n");
+ media_dbg(media, "Unable to parse format\n");
return -EINVAL;
}
--
1.7.2.5
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
