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v4l2: add interlaced support

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This commit is contained in:
Rob Clark 2010-12-04 13:43:11 -06:00
parent 538d3a959b
commit 6c8268dbfd
6 changed files with 41 additions and 35 deletions
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50
sys/v4l2/gstv4l2object.c
View file

@ -1361,8 +1361,8 @@ gst_v4l2_object_get_all_caps (void)
*/
gboolean
gst_v4l2_object_get_caps_info (GstV4l2Object * v4l2object, GstCaps * caps,
struct v4l2_fmtdesc ** format, gint * w, gint * h, guint * fps_n,
guint * fps_d, guint * size)
struct v4l2_fmtdesc ** format, gint * w, gint * h,
gboolean * interlaced, guint * fps_n, guint * fps_d, guint * size)
{
GstStructure *structure;
const GValue *framerate;
@ -1391,6 +1391,9 @@ gst_v4l2_object_get_caps_info (GstV4l2Object * v4l2object, GstCaps * caps,
if (!gst_structure_get_int (structure, "height", h))
return FALSE;
if (!gst_structure_get_boolean (structure, "interlaced", interlaced))
*interlaced = FALSE;
framerate = gst_structure_get_value (structure, "framerate");
if (!framerate)
return FALSE;
@ -1987,15 +1990,15 @@ gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
fmt.fmt.pix.width = *width;
fmt.fmt.pix.height = *height;
fmt.fmt.pix.pixelformat = pixelformat;
fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
fmt.fmt.pix.field = V4L2_FIELD_NONE;
r = v4l2_ioctl (fd, VIDIOC_TRY_FMT, &fmt);
if (r < 0 && errno == EINVAL) {
/* try again with progressive video */
/* try again with interlaced video */
fmt.fmt.pix.width = *width;
fmt.fmt.pix.height = *height;
fmt.fmt.pix.pixelformat = pixelformat;
fmt.fmt.pix.field = V4L2_FIELD_NONE;
fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
r = v4l2_ioctl (fd, VIDIOC_TRY_FMT, &fmt);
}
@ -2037,6 +2040,7 @@ gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
*height = fmt.fmt.pix.height;
switch (fmt.fmt.pix.field) {
case V4L2_FIELD_ANY:
case V4L2_FIELD_NONE:
*interlaced = FALSE;
break;
@ -2058,10 +2062,22 @@ gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
gboolean
gst_v4l2_object_set_format (GstV4l2Object * v4l2object, guint32 pixelformat,
guint32 width, guint32 height)
guint32 width, guint32 height, gboolean interlaced)
{
gint fd = v4l2object->video_fd;
struct v4l2_format format;
enum v4l2_field field;
if (interlaced) {
GST_DEBUG_OBJECT (v4l2object->element, "interlaced video");
/* ideally we would differentiate between types of interlaced video
* but there is not sufficient information in the caps..
*/
field = V4L2_FIELD_SEQ_TB;
} else {
GST_DEBUG_OBJECT (v4l2object->element, "progressive video");
field = V4L2_FIELD_NONE;
}
GST_DEBUG_OBJECT (v4l2object->element, "Setting format to %dx%d, format "
"%" GST_FOURCC_FORMAT, width, height, GST_FOURCC_ARGS (pixelformat));
@ -2081,7 +2097,8 @@ gst_v4l2_object_set_format (GstV4l2Object * v4l2object, guint32 pixelformat,
if (format.type == v4l2object->type &&
format.fmt.pix.width == width &&
format.fmt.pix.height == height &&
format.fmt.pix.pixelformat == pixelformat) {
format.fmt.pix.pixelformat == pixelformat &&
format.fmt.pix.field == field) {
/* Nothing to do. We want to succeed immediately
* here because setting the same format back
* can still fail due to EBUSY. By short-circuiting
@ -2098,25 +2115,10 @@ gst_v4l2_object_set_format (GstV4l2Object * v4l2object, guint32 pixelformat,
format.fmt.pix.width = width;
format.fmt.pix.height = height;
format.fmt.pix.pixelformat = pixelformat;
/* FIXME: request whole frames; need to use gstreamer interlace support
* (INTERLACED mode returns frames where the fields have already been
* combined, there are other modes for requesting fields individually) */
format.fmt.pix.field = V4L2_FIELD_INTERLACED;
format.fmt.pix.field = field;
if (v4l2_ioctl (fd, VIDIOC_S_FMT, &format) < 0) {
/* we might also get EBUSY here */
if (errno != EINVAL)
goto set_fmt_failed;
GST_DEBUG_OBJECT (v4l2object->element, "trying again...");
/* try again with progressive video */
format.fmt.pix.width = width;
format.fmt.pix.height = height;
format.fmt.pix.pixelformat = pixelformat;
format.fmt.pix.field = V4L2_FIELD_NONE;
if (v4l2_ioctl (fd, VIDIOC_S_FMT, &format) < 0)
goto set_fmt_failed;
goto set_fmt_failed;
}
if (format.fmt.pix.width != width || format.fmt.pix.height != height)

4
sys/v4l2/gstv4l2object.h
View file

@ -181,7 +181,7 @@ GstCaps* gst_v4l2_object_probe_caps_for_format (GstV4l2Object *v4l2object,
gboolean gst_v4l2_object_get_caps_info (GstV4l2Object *v4l2object, GstCaps *caps,
struct v4l2_fmtdesc **format, gint *w, gint *h,
guint *fps_n, guint *fps_d, guint *size);
gboolean * interlaced, guint *fps_n, guint *fps_d, guint *size);
GSList* gst_v4l2_object_get_format_list (GstV4l2Object *v4l2object);
@ -190,7 +190,7 @@ GstCaps* gst_v4l2_object_get_all_caps (void);
GstStructure* gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc);
gboolean gst_v4l2_object_set_format (GstV4l2Object *v4l2object, guint32 pixelformat, guint32 width, guint32 height);
gboolean gst_v4l2_object_set_format (GstV4l2Object *v4l2object, guint32 pixelformat, guint32 width, guint32 height, gboolean interlaced);
gboolean gst_v4l2_object_start_streaming (GstV4l2Object *v4l2object);
gboolean gst_v4l2_object_stop_streaming (GstV4l2Object *v4l2object);

7
sys/v4l2/gstv4l2sink.c
View file

@ -689,6 +689,7 @@ gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
gint w = 0, h = 0;
gboolean interlaced;
struct v4l2_fmtdesc *format;
guint fps_n, fps_d;
guint size;
@ -724,7 +725,7 @@ gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
/* we want our own v4l2 type of fourcc codes */
if (!gst_v4l2_object_get_caps_info (v4l2sink->v4l2object, caps,
&format, &w, &h, &fps_n, &fps_d, &size)) {
&format, &w, &h, &interlaced, &fps_n, &fps_d, &size)) {
GST_DEBUG_OBJECT (v4l2sink, "can't get capture format from caps %p", caps);
return FALSE;
}
@ -734,8 +735,8 @@ gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
return FALSE;
}
if (!gst_v4l2_object_set_format (v4l2sink->v4l2object, format->pixelformat, w,
h)) {
if (!gst_v4l2_object_set_format (v4l2sink->v4l2object, format->pixelformat,
w, h, interlaced)) {
/* error already posted */
return FALSE;
}

7
sys/v4l2/gstv4l2src.c
View file

@ -611,6 +611,7 @@ gst_v4l2src_set_caps (GstBaseSrc * src, GstCaps * caps)
{
GstV4l2Src *v4l2src;
gint w = 0, h = 0;
gboolean interlaced;
struct v4l2_fmtdesc *format;
guint fps_n, fps_d;
guint size;
@ -632,7 +633,7 @@ gst_v4l2src_set_caps (GstBaseSrc * src, GstCaps * caps)
/* we want our own v4l2 type of fourcc codes */
if (!gst_v4l2_object_get_caps_info (v4l2src->v4l2object, caps, &format, &w,
&h, &fps_n, &fps_d, &size)) {
&h, &interlaced, &fps_n, &fps_d, &size)) {
GST_INFO_OBJECT (v4l2src,
"can't get capture format from caps %" GST_PTR_FORMAT, caps);
return FALSE;
@ -641,8 +642,8 @@ gst_v4l2src_set_caps (GstBaseSrc * src, GstCaps * caps)
GST_DEBUG_OBJECT (v4l2src, "trying to set_capture %dx%d at %d/%d fps, "
"format %s", w, h, fps_n, fps_d, format->description);
if (!gst_v4l2src_set_capture (v4l2src, format->pixelformat, w, h, fps_n,
fps_d))
if (!gst_v4l2src_set_capture (v4l2src, format->pixelformat, w, h,
interlaced, fps_n, fps_d))
/* error already posted */
return FALSE;

5
sys/v4l2/v4l2src_calls.c
View file

@ -214,7 +214,8 @@ too_many_trials:
******************************************************/
gboolean
gst_v4l2src_set_capture (GstV4l2Src * v4l2src, guint32 pixelformat,
guint32 width, guint32 height, guint fps_n, guint fps_d)
guint32 width, guint32 height, gboolean interlaced,
guint fps_n, guint fps_d)
{
gint fd = v4l2src->v4l2object->video_fd;
struct v4l2_streamparm stream;
@ -223,7 +224,7 @@ gst_v4l2src_set_capture (GstV4l2Src * v4l2src, guint32 pixelformat,
return TRUE;
if (!gst_v4l2_object_set_format (v4l2src->v4l2object, pixelformat, width,
height)) {
height, interlaced)) {
/* error already reported */
return FALSE;
}

3
sys/v4l2/v4l2src_calls.h
View file

@ -31,7 +31,8 @@ gboolean gst_v4l2src_get_capture (GstV4l2Src * v4l2src);
gboolean gst_v4l2src_set_capture (GstV4l2Src * v4l2src,
guint32 pixelformat,
guint32 width, guint32 height,
guint32 fps_n, guint32 fps_d);
gboolean interlaced,
guint32 fps_n, guint32 fps_d);
gboolean gst_v4l2src_capture_init (GstV4l2Src * v4l2src, GstCaps *caps);
gboolean gst_v4l2src_capture_start (GstV4l2Src * v4l2src);