/* GStreamer * * Copyright (C) 2001-2002 Ronald Bultje * 2006 Edgard Lima * * 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__ #include "ext/videodev2.h" #ifdef HAVE_LIBV4L2 # include #endif #include "v4l2-utils.h" #include #include #include typedef struct _GstV4l2Object GstV4l2Object; typedef struct _GstV4l2ObjectClassHelper GstV4l2ObjectClassHelper; #include /* size of v4l2 buffer pool in streaming case */ #define GST_V4L2_MIN_BUFFERS 2 /* max frame width/height */ #define GST_V4L2_MAX_SIZE (1<<15) /* 2^15 == 32768 */ G_BEGIN_DECLS #define GST_TYPE_V4L2_IO_MODE (gst_v4l2_io_mode_get_type ()) GType gst_v4l2_io_mode_get_type (void); #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, GST_V4L2_IO_DMABUF_IMPORT = 5 } 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) /* checks whether the current v4lv4l2object has already been open()'ed or not */ #define GST_V4L2_CHECK_OPEN(v4l2object) \ if (!GST_V4L2_IS_OPEN(v4l2object)) \ { \ GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \ (_("Device is not open.")), (NULL)); \ return FALSE; \ } /* checks whether the current v4lv4l2object is close()'ed or whether it is still open */ #define GST_V4L2_CHECK_NOT_OPEN(v4l2object) \ if (GST_V4L2_IS_OPEN(v4l2object)) \ { \ GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \ (_("Device is open.")), (NULL)); \ return FALSE; \ } /* checks whether we're out of capture mode or not */ #define GST_V4L2_CHECK_NOT_ACTIVE(v4l2object) \ if (GST_V4L2_IS_ACTIVE(v4l2object)) \ { \ GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \ (NULL), ("Device is in streaming mode")); \ return 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; gboolean active; gboolean streaming; /* the current format */ struct v4l2_fmtdesc *fmtdesc; struct v4l2_format format; GstVideoInfo info; GstVideoAlignment align; /* Features */ gboolean need_video_meta; gboolean has_alpha_component; /* only used if the device supports MPLANE * nb planes is meaning of v4l2 planes * the gstreamer equivalent is gst_buffer_n_memory */ gint n_v4l2_planes; /* We cache the frame duration if known */ GstClockTime duration; /* if the MPLANE device support both contiguous and non contiguous * it allows to select which one we want. But we prefered_non_contiguous * non contiguous mode. */ gboolean prefered_non_contiguous; /* This will be set if supported in decide_allocation. It can be used to * calculate the minimum latency. */ guint32 min_buffers; /* wanted mode */ GstV4l2IOMode req_mode; /* optional pool */ GstBufferPool *pool; /* the video device's capabilities */ struct v4l2_capability vcap; /* opened device specific capabilities */ guint32 device_caps; /* lists... */ GSList *formats; /* list of available capture formats */ GstCaps *probed_caps; 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; /* funcs */ GstV4l2GetInOutFunction get_in_out_func; GstV4l2SetInOutFunction set_in_out_func; GstV4l2UpdateFpsFunction update_fps_func; /* syscalls */ gint (*fd_open) (gint fd, gint v4l2_flags); gint (*close) (gint fd); gint (*dup) (gint fd); gint (*ioctl) (gint fd, gulong request, ...); gssize (*read) (gint fd, gpointer buffer, gsize n); gpointer (*mmap) (gpointer start, gsize length, gint prot, gint flags, gint fd, gint64 offset); gint (*munmap) (gpointer _start, gsize length); /* Quirks */ /* Skips interlacing probes */ gboolean never_interlaced; /* Allow to skip reading initial format through G_FMT. Some devices * just fails if you don't call S_FMT first. (ex: M2M decoders) */ gboolean no_initial_format; /* Avoid any try_fmt probe. This is used by v4l2src to speedup start up time * on slow USB firmwares. When this is set, gst_v4l2_set_format() will modify * the caps to reflect what was negotiated during fixation */ gboolean skip_try_fmt_probes; }; 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_OUTPUT_IO_MODE, \ PROP_CAPTURE_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); void gst_v4l2_object_install_m2m_properties_helper (GObjectClass * gobject_class); 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_open_shared (GstV4l2Object * v4l2object, GstV4l2Object * other); gboolean gst_v4l2_object_close (GstV4l2Object * v4l2object); /* probing */ GstCaps* gst_v4l2_object_get_all_caps (void); GstCaps* gst_v4l2_object_get_raw_caps (void); GstCaps* gst_v4l2_object_get_codec_caps (void); gint gst_v4l2_object_extrapolate_stride (const GstVideoFormatInfo * finfo, gint plane, gint stride); gboolean gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps, GstV4l2Error * error); gboolean gst_v4l2_object_try_format (GstV4l2Object * v4l2object, GstCaps * caps, GstV4l2Error * error); 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); GstCaps * gst_v4l2_object_probe_caps (GstV4l2Object * v4l2object, GstCaps * filter); GstCaps * gst_v4l2_object_get_caps (GstV4l2Object * v4l2object, GstCaps * filter); gboolean gst_v4l2_object_acquire_format (GstV4l2Object * v4l2object, GstVideoInfo * info); gboolean gst_v4l2_object_set_crop (GstV4l2Object * obj); gboolean gst_v4l2_object_decide_allocation (GstV4l2Object * v4l2object, GstQuery * query); gboolean gst_v4l2_object_propose_allocation (GstV4l2Object * obj, GstQuery * query); GstStructure * gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc); /* TODO Move to proper namespace */ /* open/close the device */ gboolean gst_v4l2_open (GstV4l2Object * v4l2object); gboolean gst_v4l2_dup (GstV4l2Object * v4l2object, GstV4l2Object * other); gboolean gst_v4l2_close (GstV4l2Object * v4l2object); /* norm/input/output */ gboolean gst_v4l2_get_norm (GstV4l2Object * v4l2object, v4l2_std_id * norm); gboolean gst_v4l2_set_norm (GstV4l2Object * v4l2object, v4l2_std_id norm); gboolean gst_v4l2_get_input (GstV4l2Object * v4l2object, gint * input); gboolean gst_v4l2_set_input (GstV4l2Object * v4l2object, gint input); gboolean gst_v4l2_get_output (GstV4l2Object * v4l2object, gint * output); gboolean gst_v4l2_set_output (GstV4l2Object * v4l2object, gint output); /* frequency control */ gboolean gst_v4l2_get_frequency (GstV4l2Object * v4l2object, gint tunernum, gulong * frequency); gboolean gst_v4l2_set_frequency (GstV4l2Object * v4l2object, gint tunernum, gulong frequency); gboolean gst_v4l2_signal_strength (GstV4l2Object * v4l2object, gint tunernum, gulong * signal); /* attribute control */ gboolean gst_v4l2_get_attribute (GstV4l2Object * v4l2object, int attribute, int * value); gboolean gst_v4l2_set_attribute (GstV4l2Object * v4l2object, int attribute, const int value); gboolean gst_v4l2_set_controls (GstV4l2Object * v4l2object, GstStructure * controls); G_END_DECLS #endif /* __GST_V4L2_OBJECT_H__ */