gstreamer/sys/v4l2/gstv4l2object.h
Michael Olbrich 74d217c44b v4l2: improve pixel aspect ratio handling
Instead of just assuming a aspect ratio of 1/1 use VIDIOC_CROPCAP to ask
the device.
This also add a pixel-aspect-ratio property to overwrite the value from the
driver and a force-aspect-ratio property to ignore it.

https://bugzilla.gnome.org/show_bug.cgi?id=700285
2013-06-04 17:37:15 +02:00

292 lines
12 KiB
C

/* GStreamer
*
* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
* 2006 Edgard Lima <edgard.lima@indt.org.br>
*
* gstv4l2object.h: base class for V4L2 elements
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_V4L2_OBJECT_H__
#define __GST_V4L2_OBJECT_H__
/* Because of some really cool feature in video4linux1, also known as
* 'not including sys/types.h and sys/time.h', we had to include it
* ourselves. In all their intelligence, these people decided to fix
* this in the next version (video4linux2) in such a cool way that it
* breaks all compilations of old stuff...
* The real problem is actually that linux/time.h doesn't use proper
* macro checks before defining types like struct timeval. The proper
* fix here is to either fuck the kernel header (which is what we do
* by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
* upstream, which I'll consider doing later on. If you get compiler
* errors here, check your linux/time.h && sys/time.h header setup.
*/
#include <sys/ioctl.h>
#include <sys/types.h>
#ifdef __sun
#include <sys/videodev2.h>
#elif defined(__FreeBSD__)
#include <linux/videodev2.h>
#else /* linux */
#include <linux/types.h>
#define _LINUX_TIME_H
#define __user
#include <linux/videodev2.h>
#endif
#include <gst/gst.h>
#include <gst/base/gstpushsrc.h>
#include <gst/video/video.h>
typedef struct _GstV4l2Object GstV4l2Object;
typedef struct _GstV4l2ObjectClassHelper GstV4l2ObjectClassHelper;
typedef struct _GstV4l2Xv GstV4l2Xv;
#include <gstv4l2bufferpool.h>
/* size of v4l2 buffer pool in streaming case */
#define GST_V4L2_MAX_BUFFERS 16
#define GST_V4L2_MIN_BUFFERS 1
/* max frame width/height */
#define GST_V4L2_MAX_SIZE (1<<15) /* 2^15 == 32768 */
G_BEGIN_DECLS
#define GST_V4L2_OBJECT(obj) (GstV4l2Object *)(obj)
typedef enum {
GST_V4L2_IO_AUTO = 0,
GST_V4L2_IO_RW = 1,
GST_V4L2_IO_MMAP = 2,
GST_V4L2_IO_USERPTR = 3,
GST_V4L2_IO_DMABUF = 4
} GstV4l2IOMode;
typedef gboolean (*GstV4l2GetInOutFunction) (GstV4l2Object * v4l2object, gint * input);
typedef gboolean (*GstV4l2SetInOutFunction) (GstV4l2Object * v4l2object, gint input);
typedef gboolean (*GstV4l2UpdateFpsFunction) (GstV4l2Object * v4l2object);
#define GST_V4L2_WIDTH(o) (GST_VIDEO_INFO_WIDTH (&(o)->info))
#define GST_V4L2_HEIGHT(o) (GST_VIDEO_INFO_HEIGHT (&(o)->info))
#define GST_V4L2_PIXELFORMAT(o) ((o)->fmtdesc->pixelformat)
#define GST_V4L2_FPS_N(o) (GST_VIDEO_INFO_FPS_N (&(o)->info))
#define GST_V4L2_FPS_D(o) (GST_VIDEO_INFO_FPS_D (&(o)->info))
/* simple check whether the device is open */
#define GST_V4L2_IS_OPEN(o) ((o)->video_fd > 0)
/* check whether the device is 'active' */
#define GST_V4L2_IS_ACTIVE(o) ((o)->active)
#define GST_V4L2_SET_ACTIVE(o) ((o)->active = TRUE)
#define GST_V4L2_SET_INACTIVE(o) ((o)->active = FALSE)
struct _GstV4l2Object {
GstElement * element;
enum v4l2_buf_type type; /* V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_BUF_TYPE_VIDEO_OUTPUT */
/* the video device */
char *videodev;
/* the video-device's file descriptor */
gint video_fd;
GstV4l2IOMode mode;
GstPoll * poll;
gboolean can_poll_device;
gboolean active;
gboolean streaming;
/* the current format */
struct v4l2_fmtdesc *fmtdesc;
GstVideoInfo info;
guint32 bytesperline;
guint32 sizeimage;
GstClockTime duration;
/* wanted mode */
GstV4l2IOMode req_mode;
/* optional pool */
GstBufferPool *pool;
/* the video device's capabilities */
struct v4l2_capability vcap;
/* the video device's window properties */
struct v4l2_window vwin;
/* some more info about the current input's capabilities */
struct v4l2_input vinput;
/* lists... */
GSList *formats; /* list of available capture formats */
GList *colors;
GList *norms;
GList *channels;
GData *controls;
/* properties */
v4l2_std_id tv_norm;
gchar *channel;
gulong frequency;
GstStructure *extra_controls;
gboolean keep_aspect;
GValue *par;
/* X-overlay */
GstV4l2Xv *xv;
gulong xwindow_id;
/* funcs */
GstV4l2GetInOutFunction get_in_out_func;
GstV4l2SetInOutFunction set_in_out_func;
GstV4l2UpdateFpsFunction update_fps_func;
};
struct _GstV4l2ObjectClassHelper {
/* probed devices */
GList *devices;
};
GType gst_v4l2_object_get_type (void);
#define V4L2_STD_OBJECT_PROPS \
PROP_DEVICE, \
PROP_DEVICE_NAME, \
PROP_DEVICE_FD, \
PROP_FLAGS, \
PROP_BRIGHTNESS, \
PROP_CONTRAST, \
PROP_SATURATION, \
PROP_HUE, \
PROP_TV_NORM, \
PROP_IO_MODE, \
PROP_EXTRA_CONTROLS, \
PROP_PIXEL_ASPECT_RATIO, \
PROP_FORCE_ASPECT_RATIO
/* create/destroy */
GstV4l2Object * gst_v4l2_object_new (GstElement * element,
enum v4l2_buf_type type,
const char *default_device,
GstV4l2GetInOutFunction get_in_out_func,
GstV4l2SetInOutFunction set_in_out_func,
GstV4l2UpdateFpsFunction update_fps_func);
void gst_v4l2_object_destroy (GstV4l2Object * v4l2object);
/* properties */
void gst_v4l2_object_install_properties_helper (GObjectClass *gobject_class, const char *default_device);
gboolean gst_v4l2_object_set_property_helper (GstV4l2Object *v4l2object,
guint prop_id, const GValue * value,
GParamSpec * pspec);
gboolean gst_v4l2_object_get_property_helper (GstV4l2Object *v4l2object,
guint prop_id, GValue * value,
GParamSpec * pspec);
/* open/close */
gboolean gst_v4l2_object_open (GstV4l2Object *v4l2object);
gboolean gst_v4l2_object_close (GstV4l2Object *v4l2object);
/* probing */
#if 0
const GList* gst_v4l2_probe_get_properties (GstPropertyProbe * probe);
void gst_v4l2_probe_probe_property (GstPropertyProbe * probe, guint prop_id,
const GParamSpec * pspec,
GList ** klass_devices);
gboolean gst_v4l2_probe_needs_probe (GstPropertyProbe * probe, guint prop_id,
const GParamSpec * pspec,
GList ** klass_devices);
GValueArray* gst_v4l2_probe_get_values (GstPropertyProbe * probe, guint prop_id,
const GParamSpec * pspec,
GList ** klass_devices);
#endif
GstCaps* gst_v4l2_object_probe_caps_for_format (GstV4l2Object *v4l2object, guint32 pixelformat,
const GstStructure * template);
GSList* gst_v4l2_object_get_format_list (GstV4l2Object *v4l2object);
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, GstCaps * caps);
gboolean gst_v4l2_object_caps_equal (GstV4l2Object * v4l2object, GstCaps * caps);
gboolean gst_v4l2_object_unlock (GstV4l2Object *v4l2object);
gboolean gst_v4l2_object_unlock_stop (GstV4l2Object *v4l2object);
gboolean gst_v4l2_object_stop (GstV4l2Object *v4l2object);
gboolean gst_v4l2_object_copy (GstV4l2Object * v4l2object,
GstBuffer * dest, GstBuffer *src);
#define GST_IMPLEMENT_V4L2_PROBE_METHODS(Type_Class, interface_as_function) \
\
static void \
interface_as_function ## _probe_probe_property (GstPropertyProbe * probe, \
guint prop_id, \
const GParamSpec * pspec) \
{ \
Type_Class *this_class = (Type_Class*) G_OBJECT_GET_CLASS (probe); \
gst_v4l2_probe_probe_property (probe, prop_id, pspec, \
&this_class->v4l2_class_devices); \
} \
\
static gboolean \
interface_as_function ## _probe_needs_probe (GstPropertyProbe * probe, \
guint prop_id, \
const GParamSpec * pspec) \
{ \
Type_Class *this_class = (Type_Class*) G_OBJECT_GET_CLASS (probe); \
return gst_v4l2_probe_needs_probe (probe, prop_id, pspec, \
&this_class->v4l2_class_devices); \
} \
\
static GValueArray * \
interface_as_function ## _probe_get_values (GstPropertyProbe * probe, \
guint prop_id, \
const GParamSpec * pspec) \
{ \
Type_Class *this_class = (Type_Class*) G_OBJECT_GET_CLASS (probe); \
return gst_v4l2_probe_get_values (probe, prop_id, pspec, \
&this_class->v4l2_class_devices); \
} \
\
static void \
interface_as_function ## _property_probe_interface_init (GstPropertyProbeInterface * iface) \
{ \
iface->get_properties = gst_v4l2_probe_get_properties; \
iface->probe_property = interface_as_function ## _probe_probe_property; \
iface->needs_probe = interface_as_function ## _probe_needs_probe; \
iface->get_values = interface_as_function ## _probe_get_values; \
}
G_END_DECLS
#endif /* __GST_V4L2_OBJECT_H__ */