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v4l2: add IO method enum

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This commit is contained in:
Wim Taymans 2011-07-18 10:52:23 +02:00
parent 23656bbb72
commit 39716c02a7
2 changed files with 47 additions and 33 deletions
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72
sys/v4l2/gstv4l2object.c
View file

@ -2062,16 +2062,17 @@ gst_v4l2_object_setup_pool (GstV4l2Object * v4l2object, GstCaps * caps)
if (!(v4l2object->pool = gst_v4l2_buffer_pool_new (v4l2object)))
goto buffer_pool_new_failed;
GST_INFO_OBJECT (v4l2object->element, "capturing buffers via mmap()");
v4l2object->use_mmap = TRUE;
GST_INFO_OBJECT (v4l2object->element, "accessing buffers via mmap()");
v4l2object->mode = GST_V4L2_IO_MMAP;
config = gst_buffer_pool_get_config (v4l2object->pool);
gst_buffer_pool_config_set (config, caps, v4l2object->info.size,
num_buffers, num_buffers, 0, 0);
gst_buffer_pool_set_config (v4l2object->pool, config);
} else if (v4l2object->vcap.capabilities & V4L2_CAP_READWRITE) {
GST_INFO_OBJECT (v4l2object->element, "capturing buffers via read()");
v4l2object->use_mmap = FALSE;
GST_INFO_OBJECT (v4l2object->element,
"accessing buffers via read()/write()");
v4l2object->mode = GST_V4L2_IO_RW;
v4l2object->pool = NULL;
} else {
goto no_supported_capture_method;
@ -2344,23 +2345,22 @@ gst_v4l2_object_start (GstV4l2Object * v4l2object)
if (!gst_buffer_pool_set_active (v4l2object->pool, TRUE))
goto activate_failed;
if (v4l2object->use_mmap) {
switch (v4l2object->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
/* for output, we assume we already queued a buffer */
break;
default:
break;
}
if (!v4l2object->streaming) {
GST_DEBUG_OBJECT (v4l2object->element, "STREAMON");
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_STREAMON,
&(v4l2object->type)) < 0)
goto start_failed;
v4l2object->streaming = TRUE;
}
switch (v4l2object->mode) {
case GST_V4L2_IO_RW:
break;
case GST_V4L2_IO_MMAP:
case GST_V4L2_IO_USERPTR:
if (!v4l2object->streaming) {
GST_DEBUG_OBJECT (v4l2object->element, "STREAMON");
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_STREAMON,
&(v4l2object->type)) < 0)
goto start_failed;
v4l2object->streaming = TRUE;
}
break;
default:
g_assert_not_reached ();
break;
}
return TRUE;
@ -2390,17 +2390,25 @@ gst_v4l2_object_stop (GstV4l2Object * v4l2object)
if (!GST_V4L2_IS_ACTIVE (v4l2object))
goto done;
if (v4l2object->use_mmap) {
if (v4l2object->streaming) {
/* we actually need to sync on all queued buffers but not
* on the non-queued ones */
GST_DEBUG_OBJECT (v4l2object->element, "STREAMOFF");
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_STREAMOFF,
&(v4l2object->type)) < 0)
goto stop_failed;
switch (v4l2object->mode) {
case GST_V4L2_IO_RW:
break;
case GST_V4L2_IO_MMAP:
case GST_V4L2_IO_USERPTR:
if (v4l2object->streaming) {
/* we actually need to sync on all queued buffers but not
* on the non-queued ones */
GST_DEBUG_OBJECT (v4l2object->element, "STREAMOFF");
if (v4l2_ioctl (v4l2object->video_fd, VIDIOC_STREAMOFF,
&(v4l2object->type)) < 0)
goto stop_failed;
v4l2object->streaming = FALSE;
}
v4l2object->streaming = FALSE;
}
break;
default:
g_assert_not_reached ();
break;
}
if (v4l2object->pool) {
@ -2639,7 +2647,7 @@ gst_v4l2_object_get_buffer (GstV4l2Object * v4l2object, GstBuffer ** buf)
switch (v4l2object->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (v4l2object->use_mmap) {
if (v4l2object->mode == GST_V4L2_IO_MMAP) {
ret = gst_v4l2_object_get_mmap (v4l2object, buf);
} else {
ret = gst_v4l2_object_get_read (v4l2object, buf);

8
sys/v4l2/gstv4l2object.h
View file

@ -71,6 +71,12 @@ G_BEGIN_DECLS
#define GST_V4L2_OBJECT(obj) (GstV4l2Object *)(obj)
typedef enum {
GST_V4L2_IO_NONE = 0,
GST_V4L2_IO_RW = 1,
GST_V4L2_IO_MMAP = 2,
GST_V4L2_IO_USERPTR = 3
} GstV4l2IOMode;
typedef gboolean (*GstV4l2GetInOutFunction) (GstV4l2Object * v4l2object, gint * input);
typedef gboolean (*GstV4l2SetInOutFunction) (GstV4l2Object * v4l2object, gint input);
@ -100,6 +106,7 @@ struct _GstV4l2Object {
/* the video-device's file descriptor */
gint video_fd;
GstV4l2IOMode mode;
GstPoll * poll;
gboolean can_poll_device;
@ -118,7 +125,6 @@ struct _GstV4l2Object {
guint32 num_buffers;
guint32 min_queued_bufs;
gboolean always_copy;
gboolean use_mmap;
GstBufferPool *pool;
/* the video device's capabilities */