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sys/v4l2/v4l2_calls.c: Treat ENOTTY (driver does not implement ioctl) the same as

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Original commit message from CVS:
* sys/v4l2/v4l2_calls.c: (gst_v4l2_fill_lists):
Treat ENOTTY (driver does not implement ioctl) the same as
EINVAL since it implies there are no available standards.
* sys/v4l2/v4l2src_calls.c: (gst_v4l2src_probe_caps_for_format),
(gst_v4l2src_get_nearest_size):
Replace gst_v4l2src_get_size_limits with 2 calls to new function
gst_v4l2src_get_nearest_size, and get it to use VIDIOC_S_FMT to
probe if the driver does not support VIDIOC_TRY_FMT for whatever
reason, and if we aren't yet actively capturing.
* sys/v4l2/v4l2src_calls.h:
Remove replaced function declaration.
This commit is contained in:
Jan Schmidt 2008-01-31 16:12:28 +00:00
parent 27d41809a0
commit 38baf136e6
4 changed files with 71 additions and 43 deletions
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16
ChangeLog
View file

@ -1,3 +1,19 @@
2008-01-31 Jan Schmidt <Jan.Schmidt@sun.com>
* sys/v4l2/v4l2_calls.c: (gst_v4l2_fill_lists):
Treat ENOTTY (driver does not implement ioctl) the same as
EINVAL since it implies there are no available standards.
* sys/v4l2/v4l2src_calls.c: (gst_v4l2src_probe_caps_for_format),
(gst_v4l2src_get_nearest_size):
Replace gst_v4l2src_get_size_limits with 2 calls to new function
gst_v4l2src_get_nearest_size, and get it to use VIDIOC_S_FMT to
probe if the driver does not support VIDIOC_TRY_FMT for whatever
reason, and if we aren't yet actively capturing.
* sys/v4l2/v4l2src_calls.h:
Remove replaced function declaration.
2008-01-31 Jan Schmidt <Jan.Schmidt@sun.com>
* configure.ac:

2
sys/v4l2/v4l2_calls.c
View file

@ -185,7 +185,7 @@ gst_v4l2_fill_lists (GstV4l2Object * v4l2object)
standard.index = n;
if (ioctl (v4l2object->video_fd, VIDIOC_ENUMSTD, &standard) < 0) {
if (errno == EINVAL)
if (errno == EINVAL || errno == ENOTTY)
break; /* end of enumeration */
else {
GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS,

85
sys/v4l2/v4l2src_calls.c
View file

@ -66,6 +66,12 @@ GST_DEBUG_CATEGORY_EXTERN (v4l2src_debug);
#define GST_IS_V4L2_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER))
#define GST_V4L2_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER, GstV4l2Buffer))
/* Local functions */
static gboolean
gst_v4l2src_get_nearest_size (GstV4l2Src * v4l2src, guint32 pixelformat,
gint * width, gint * height);
static void
gst_v4l2_buffer_finalize (GstV4l2Buffer * buffer)
{
@ -853,11 +859,19 @@ default_frame_sizes:
gint min_w, max_w, min_h, max_h;
/* This code is for Linux < 2.6.19 */
if (!gst_v4l2src_get_size_limits (v4l2src, pixelformat, &min_w, &max_w,
&min_h, &max_h)) {
min_w = min_h = 1;
max_w = max_h = GST_V4L2_MAX_SIZE;
if (!gst_v4l2src_get_nearest_size (v4l2src, pixelformat, &min_w, &min_h)) {
GST_WARNING_OBJECT (v4l2src,
"Could not probe minimum capture size for pixelformat %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
}
if (!gst_v4l2src_get_nearest_size (v4l2src, pixelformat, &max_w, &max_h)) {
GST_WARNING_OBJECT (v4l2src,
"Could not probe maximum capture size for pixelformat %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
}
ret = gst_caps_new_empty ();
tmp = gst_structure_copy (template);
gst_structure_set (tmp,
@ -1418,53 +1432,56 @@ gst_v4l2src_capture_deinit (GstV4l2Src * v4l2src)
/*
*/
gboolean
gst_v4l2src_get_size_limits (GstV4l2Src * v4l2src,
guint32 pixelformat, gint * min_w, gint * max_w, gint * min_h, gint * max_h)
static gboolean
gst_v4l2src_get_nearest_size (GstV4l2Src * v4l2src, guint32 pixelformat,
gint * width, gint * height)
{
struct v4l2_format fmt;
int fd;
g_return_val_if_fail (width != NULL, FALSE);
g_return_val_if_fail (height != NULL, FALSE);
GST_LOG_OBJECT (v4l2src,
"getting size limits with format %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (pixelformat));
"getting nearest size to %dx%d with format %" GST_FOURCC_FORMAT,
*width, *height, GST_FOURCC_ARGS (pixelformat));
fd = v4l2src->v4l2object->video_fd;
/* get size delimiters */
memset (&fmt, 0, sizeof (fmt));
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmt.fmt.pix.width = 0;
fmt.fmt.pix.height = 0;
fmt.fmt.pix.width = *width;
fmt.fmt.pix.height = *height;
fmt.fmt.pix.pixelformat = pixelformat;
fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
if (ioctl (v4l2src->v4l2object->video_fd, VIDIOC_TRY_FMT, &fmt) < 0) {
GST_DEBUG_OBJECT (v4l2src, "failed to get min size: %s",
g_strerror (errno));
if (ioctl (fd, VIDIOC_TRY_FMT, &fmt) < 0) {
/* The driver might not implement TRY_FMT, in which case we will try
S_FMT to probe */
if (errno != ENOTTY)
return FALSE;
/* Only try S_FMT if we're not actively capturing yet, which we shouldn't
be, because we're still probing */
if (GST_V4L2_IS_ACTIVE (v4l2src->v4l2object))
return FALSE;
GST_LOG_OBJECT (v4l2src,
"Failed to probe size limit with VIDIOC_TRY_FMT, trying VIDIOC_S_FMT");
fmt.fmt.pix.width = *width;
fmt.fmt.pix.height = *height;
if (ioctl (fd, VIDIOC_S_FMT, &fmt) < 0)
return FALSE;
}
if (min_w)
*min_w = fmt.fmt.pix.width;
if (min_h)
*min_h = fmt.fmt.pix.height;
GST_LOG_OBJECT (v4l2src,
"got min size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height);
"got nearest size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height);
fmt.fmt.pix.width = GST_V4L2_MAX_SIZE;
fmt.fmt.pix.height = GST_V4L2_MAX_SIZE;
if (ioctl (v4l2src->v4l2object->video_fd, VIDIOC_TRY_FMT, &fmt) < 0) {
GST_DEBUG_OBJECT (v4l2src, "failed to get max size: %s",
g_strerror (errno));
return FALSE;
}
if (max_w)
*max_w = fmt.fmt.pix.width;
if (max_h)
*max_h = fmt.fmt.pix.height;
GST_LOG_OBJECT (v4l2src,
"got max size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height);
*width = fmt.fmt.pix.width;
*height = fmt.fmt.pix.height;
return TRUE;
}

5
sys/v4l2/v4l2src_calls.h
View file

@ -47,9 +47,4 @@ gboolean gst_v4l2src_clear_format_list (GstV4l2Src * v4l2src);
GstCaps* gst_v4l2src_probe_caps_for_format (GstV4l2Src * v4l2src, guint32 pixelformat,
const GstStructure *template);
gboolean gst_v4l2src_get_size_limits (GstV4l2Src * v4l2src,
guint32 pixelformat,
gint * min_w, gint * max_w,
gint * min_h, gint * max_h);
#endif /* __V4L2SRC_CALLS_H__ */