| # Copyright (c) 2010 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import os |
| import ctypes |
| |
| _ioctl = ctypes.CDLL("libc.so.6", use_errno = True).ioctl |
| _ioctl.restype = ctypes.c_int |
| _ioctl.argtypes = (ctypes.c_int,ctypes.c_int) |
| |
| _IOC_NRBITS = 8 |
| _IOC_TYPEBITS = 8 |
| _IOC_SIZEBITS = 14 |
| _IOC_DIRBITS = 2 |
| |
| _IOC_NRSHIFT = 0 |
| _IOC_TYPESHIFT = _IOC_NRSHIFT + _IOC_NRBITS |
| _IOC_SIZESHIFT = _IOC_TYPESHIFT + _IOC_TYPEBITS |
| _IOC_DIRSHIFT = _IOC_SIZESHIFT + _IOC_SIZEBITS |
| |
| _IOC_NONE = 0 |
| _IOC_WRITE = 1 |
| _IOC_READ = 2 |
| |
| def _IOC(dir, type, nr, size): |
| return ((dir << _IOC_DIRSHIFT) | |
| (type << _IOC_TYPESHIFT) | |
| (nr << _IOC_NRSHIFT) | |
| (size << _IOC_SIZESHIFT)) |
| |
| def _IO(type, nr): |
| def ioctl(fd): |
| if _ioctl(fd, _IOC(_IOC_NONE, ord(type), nr, 0)) == -1: |
| raise IOError(ctypes.get_errno(), "ioctl error") |
| return ioctl |
| |
| def _IOR(type, nr, size): |
| def ioctl(fd): |
| arg = size() |
| if _ioctl(fd, _IOC(_IOC_READ, ord(type), nr, |
| ctypes.sizeof(size)), ctypes.byref(arg)) == -1: |
| raise IOError(ctypes.get_errno(), "ioctl error") |
| return arg |
| return ioctl |
| |
| def _IOW(type, nr, size): |
| def ioctl(fd, arg): |
| if not isinstance(arg, size): |
| raise TypeError() |
| if _ioctl(fd, _IOC(_IOC_WRITE, ord(type), nr, |
| ctypes.sizeof(size)), ctypes.byref(arg)) == -1: |
| raise IOError(ctypes.get_errno(), "ioctl error") |
| return ioctl |
| |
| def _IOWR(type, nr, size): |
| def ioctl(fd, arg): |
| if not isinstance(arg, size): |
| raise TypeError() |
| if _ioctl(fd, _IOC(_IOC_READ|_IOC_WRITE, ord(type), nr, |
| ctypes.sizeof(size)), ctypes.byref(arg)) == -1: |
| raise IOError(ctypes.get_errno(), "ioctl error") |
| return arg |
| return ioctl |
| |
| _kernel_time_t = ctypes.c_long |
| _kernel_suseconds_t = ctypes.c_long |
| class timeval(ctypes.Structure): |
| _fields_ = [("tv_sec" , _kernel_time_t ), |
| ("tv_usec", _kernel_suseconds_t)] |
| |
| |
| V4L2_CAP_VIDEO_CAPTURE = 0x00000001 |
| V4L2_CAP_VIDEO_OUTPUT = 0x00000002 |
| V4L2_CAP_VIDEO_OVERLAY = 0x00000004 |
| V4L2_CAP_VBI_CAPTURE = 0x00000010 |
| V4L2_CAP_VBI_OUTPUT = 0x00000020 |
| V4L2_CAP_SLICED_VBI_CAPTURE = 0x00000040 |
| V4L2_CAP_SLICED_VBI_OUTPUT = 0x00000080 |
| V4L2_CAP_RDS_CAPTURE = 0x00000100 |
| V4L2_CAP_VIDEO_OUTPUT_OVERLAY = 0x00000200 |
| V4L2_CAP_HW_FREQ_SEEK = 0x00000400 |
| V4L2_CAP_RDS_OUTPUT = 0x00000800 |
| V4L2_CAP_TUNER = 0x00010000 |
| V4L2_CAP_AUDIO = 0x00020000 |
| V4L2_CAP_RADIO = 0x00040000 |
| V4L2_CAP_MODULATOR = 0x00080000 |
| V4L2_CAP_READWRITE = 0x01000000 |
| V4L2_CAP_ASYNCIO = 0x02000000 |
| V4L2_CAP_STREAMING = 0x04000000 |
| |
| V4L2_FMT_FLAG_COMPRESSED = 0x0001 |
| V4L2_FMT_FLAG_EMULATED = 0x0002 |
| |
| V4L2_FRMSIZE_TYPE_DISCRETE = 1 |
| V4L2_FRMSIZE_TYPE_CONTINUOUS = 2 |
| V4L2_FRMSIZE_TYPE_STEPWISE = 3 |
| |
| def v4l2_fourcc(a,b,c,d): return ord(a)|ord(b)<<8|ord(c)<<16|ord(d)<<24 |
| V4L2_PIX_FMT_YUYV = v4l2_fourcc('Y', 'U', 'Y', 'V') |
| |
| v4l2_buf_type = ctypes.c_int |
| V4L2_BUF_TYPE_VIDEO_CAPTURE = 1 |
| V4L2_BUF_TYPE_VIDEO_OUTPUT = 2 |
| V4L2_BUF_TYPE_VIDEO_OVERLAY = 3 |
| V4L2_BUF_TYPE_VBI_CAPTURE = 4 |
| V4L2_BUF_TYPE_VBI_OUTPUT = 5 |
| V4L2_BUF_TYPE_SLICED_VBI_CAPTURE = 6 |
| V4L2_BUF_TYPE_SLICED_VBI_OUTPUT = 7 |
| V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY = 8 |
| V4L2_BUF_TYPE_PRIVATE = 0x80 |
| |
| v4l2_memory = ctypes.c_int |
| V4L2_MEMORY_MMAP = 1 |
| V4L2_MEMORY_USERPTR = 2 |
| V4L2_MEMORY_OVERLAY = 3 |
| |
| v4l2_field = ctypes.c_int |
| V4L2_FIELD_ANY = 0 |
| V4L2_FIELD_NONE = 1 |
| V4L2_FIELD_TOP = 2 |
| V4L2_FIELD_BOTTOM = 3 |
| V4L2_FIELD_INTERLACED = 4 |
| V4L2_FIELD_SEQ_TB = 5 |
| V4L2_FIELD_SEQ_BT = 6 |
| V4L2_FIELD_ALTERNATE = 7 |
| V4L2_FIELD_INTERLACED_TB = 8 |
| V4L2_FIELD_INTERLACED_BT = 9 |
| |
| v4l2_colorspace = ctypes.c_int |
| V4L2_COLORSPACE_SMPTE170M = 1 |
| V4L2_COLORSPACE_SMPTE240M = 2 |
| V4L2_COLORSPACE_REC709 = 3 |
| V4L2_COLORSPACE_BT878 = 4 |
| V4L2_COLORSPACE_470_SYSTEM_M = 5 |
| V4L2_COLORSPACE_470_SYSTEM_BG = 6 |
| V4L2_COLORSPACE_JPEG = 7 |
| V4L2_COLORSPACE_SRGB = 8 |
| |
| |
| class v4l2_capability(ctypes.Structure): |
| _fields_ = [("driver" , ctypes.c_char * 16), |
| ("card" , ctypes.c_char * 32), |
| ("bus_info" , ctypes.c_char * 32), |
| ("version" , ctypes.c_uint32 ), |
| ("capabilities", ctypes.c_uint32 ), |
| ("reserved" , ctypes.c_uint32 * 4 )] |
| |
| class v4l2_timecode(ctypes.Structure): |
| _fields_ = [("type" , ctypes.c_uint32 ), |
| ("flags" , ctypes.c_uint32 ), |
| ("frames" , ctypes.c_uint8 ), |
| ("seconds" , ctypes.c_uint8 ), |
| ("minutes" , ctypes.c_uint8 ), |
| ("hours" , ctypes.c_uint8 ), |
| ("userbits", ctypes.c_uint8 * 4)] |
| |
| class v4l2_requestbuffers(ctypes.Structure): |
| _fields_ = [("count" , ctypes.c_uint32 ), |
| ("type" , v4l2_buf_type ), |
| ("memory" , v4l2_memory ), |
| ("reserved", ctypes.c_uint32 * 2)] |
| |
| class anonymous(ctypes.Union): |
| _fields_ = [("offset" , ctypes.c_uint32), |
| ("userptr", ctypes.c_ulong )] |
| class v4l2_buffer(ctypes.Structure): |
| _fields_ = [("index" , ctypes.c_uint32), |
| ("type" , v4l2_buf_type ), |
| ("bytesused", ctypes.c_uint32), |
| ("flags" , ctypes.c_uint32), |
| ("field" , v4l2_field ), |
| ("timestamp", timeval ), |
| ("timecode" , v4l2_timecode ), |
| ("sequence" , ctypes.c_uint32), |
| ("memory" , v4l2_memory ), |
| ("m" , anonymous ), |
| ("length" , ctypes.c_uint32), |
| ("input" , ctypes.c_uint32), |
| ("reserved" , ctypes.c_uint32)] |
| del anonymous |
| |
| class v4l2_fmtdesc(ctypes.Structure): |
| _fields_ = [("index" , ctypes.c_uint32 ), |
| ("type" , v4l2_buf_type ), |
| ("flags" , ctypes.c_uint32 ), |
| ("description", ctypes.c_char * 32 ), |
| ("pixelformat", ctypes.c_uint32 ), |
| ("reserved" , ctypes.c_uint32 * 4)] |
| |
| class v4l2_pix_format(ctypes.Structure): |
| _fields_ = [("width" , ctypes.c_uint32), |
| ("height" , ctypes.c_uint32), |
| ("pixelformat" , ctypes.c_uint32), |
| ("field" , v4l2_field ), |
| ("bytesperline", ctypes.c_uint32), |
| ("sizeimage" , ctypes.c_uint32), |
| ("colorspace" , v4l2_colorspace), |
| ("priv" , ctypes.c_uint32)] |
| |
| # **** FIXME!!! **** |
| v4l2_window = v4l2_vbi_format = v4l2_sliced_vbi_format = ctypes.c_void_p |
| # ****************** |
| |
| class anonymous(ctypes.Union): |
| _fields_ = [("pix" , v4l2_pix_format ), |
| ("win" , v4l2_window ), |
| ("vbi" , v4l2_vbi_format ), |
| ("sliced" , v4l2_sliced_vbi_format), |
| ("raw_data", ctypes.c_ubyte * 200 )] |
| class v4l2_format(ctypes.Structure): |
| _fields_ = [("type", v4l2_buf_type), |
| ("fmt" , anonymous )] |
| del anonymous |
| |
| class v4l2_frmsize_discrete(ctypes.Structure): |
| _fields_ = [("width" , ctypes.c_uint32), |
| ("height", ctypes.c_uint32)] |
| |
| class v4l2_frmsize_stepwise(ctypes.Structure): |
| _fields_ = [("min_width" , ctypes.c_uint32), |
| ("max_width" , ctypes.c_uint32), |
| ("step_width" , ctypes.c_uint32), |
| ("min_height" , ctypes.c_uint32), |
| ("max_height" , ctypes.c_uint32), |
| ("step_height", ctypes.c_uint32)] |
| |
| class anonymous(ctypes.Union): |
| _fields_ = [("discrete", v4l2_frmsize_discrete), |
| ("stepwise", v4l2_frmsize_stepwise)] |
| class v4l2_frmsizeenum(ctypes.Structure): |
| _anonymous_ = ["anonymous"] |
| _fields_ = [("index" , ctypes.c_uint32 ), |
| ("pixel_format", ctypes.c_uint32 ), |
| ("type" , ctypes.c_uint32 ), |
| ("anonymous" , anonymous ), |
| ("reserved" , ctypes.c_uint32 * 2)] |
| del anonymous |
| |
| VIDIOC_QUERYCAP = _IOR ('V', 0 , v4l2_capability) |
| VIDIOC_RESERVED = _IO ('V', 1 ) |
| VIDIOC_ENUM_FMT = _IOWR('V', 2 , v4l2_fmtdesc) |
| VIDIOC_G_FMT = _IOWR('V', 4 , v4l2_format) |
| VIDIOC_S_FMT = _IOWR('V', 5 , v4l2_format) |
| VIDIOC_REQBUFS = _IOWR('V', 8 , v4l2_requestbuffers) |
| VIDIOC_QUERYBUF = _IOWR('V', 9 , v4l2_buffer) |
| #VIDIOC_G_FBUF = _IOR ('V', 10, v4l2_framebuffer) |
| #VIDIOC_S_FBUF = _IOW ('V', 11, v4l2_framebuffer) |
| #VIDIOC_OVERLAY = _IOW ('V', 14, ctypes.c_int) |
| VIDIOC_QBUF = _IOWR('V', 15, v4l2_buffer) |
| VIDIOC_DQBUF = _IOWR('V', 17, v4l2_buffer) |
| VIDIOC_STREAMON = _IOW ('V', 18, ctypes.c_int) |
| VIDIOC_STREAMOFF = _IOW ('V', 19, ctypes.c_int) |
| #VIDIOC_G_PARM = _IOWR('V', 21, v4l2_streamparm) |
| #VIDIOC_S_PARM = _IOWR('V', 22, v4l2_streamparm) |
| #VIDIOC_G_STD = _IOR ('V', 23, v4l2_std_id) |
| #VIDIOC_S_STD = _IOW ('V', 24, v4l2_std_id) |
| #VIDIOC_ENUMSTD = _IOWR('V', 25, v4l2_standard) |
| #VIDIOC_ENUMINPUT = _IOWR('V', 26, v4l2_input) |
| #VIDIOC_G_CTRL = _IOWR('V', 27, v4l2_control) |
| #VIDIOC_S_CTRL = _IOWR('V', 28, v4l2_control) |
| #VIDIOC_G_TUNER = _IOWR('V', 29, v4l2_tuner) |
| #VIDIOC_S_TUNER = _IOW ('V', 30, v4l2_tuner) |
| #VIDIOC_G_AUDIO = _IOR ('V', 33, v4l2_audio) |
| #VIDIOC_S_AUDIO = _IOW ('V', 34, v4l2_audio) |
| #VIDIOC_QUERYCTRL = _IOWR('V', 36, v4l2_queryctrl) |
| #VIDIOC_QUERYMENU = _IOWR('V', 37, v4l2_querymenu) |
| #VIDIOC_G_INPUT = _IOR ('V', 38, ctypes.c_int) |
| #VIDIOC_S_INPUT = _IOWR('V', 39, ctypes.c_int) |
| #VIDIOC_G_OUTPUT = _IOR ('V', 46, ctypes.c_int) |
| #VIDIOC_S_OUTPUT = _IOWR('V', 47, ctypes.c_int) |
| #VIDIOC_ENUMOUTPUT = _IOWR('V', 48, v4l2_output) |
| #VIDIOC_G_AUDOUT = _IOR ('V', 49, v4l2_audioout) |
| #VIDIOC_S_AUDOUT = _IOW ('V', 50, v4l2_audioout) |
| #VIDIOC_G_MODULATOR = _IOWR('V', 54, v4l2_modulator) |
| #VIDIOC_S_MODULATOR = _IOW ('V', 55, v4l2_modulator) |
| #VIDIOC_G_FREQUENCY = _IOWR('V', 56, v4l2_frequency) |
| #VIDIOC_S_FREQUENCY = _IOW ('V', 57, v4l2_frequency) |
| #VIDIOC_CROPCAP = _IOWR('V', 58, v4l2_cropcap) |
| #VIDIOC_G_CROP = _IOWR('V', 59, v4l2_crop) |
| #VIDIOC_S_CROP = _IOW ('V', 60, v4l2_crop) |
| #VIDIOC_G_JPEGCOMP = _IOR ('V', 61, v4l2_jpegcompression) |
| #VIDIOC_S_JPEGCOMP = _IOW ('V', 62, v4l2_jpegcompression) |
| #VIDIOC_QUERYSTD = _IOR ('V', 63, v4l2_std_id) |
| #VIDIOC_TRY_FMT = _IOWR('V', 64, v4l2_format) |
| #VIDIOC_ENUMAUDIO = _IOWR('V', 65, v4l2_audio) |
| #VIDIOC_ENUMAUDOUT = _IOWR('V', 66, v4l2_audioout) |
| #VIDIOC_G_PRIORITY = _IOR ('V', 67, v4l2_priority) |
| #VIDIOC_S_PRIORITY = _IOW ('V', 68, v4l2_priority) |
| #VIDIOC_G_SLICED_VBI_CAP = _IOWR('V', 69, v4l2_sliced_vbi_cap) |
| #VIDIOC_LOG_STATUS = _IO ('V', 70) |
| #VIDIOC_G_EXT_CTRLS = _IOWR('V', 71, v4l2_ext_controls) |
| #VIDIOC_S_EXT_CTRLS = _IOWR('V', 72, v4l2_ext_controls) |
| #VIDIOC_TRY_EXT_CTRLS = _IOWR('V', 73, v4l2_ext_controls) |
| VIDIOC_ENUM_FRAMESIZES = _IOWR('V', 74, v4l2_frmsizeenum) |
| #VIDIOC_ENUM_FRAMEINTERVALS = _IOWR('V', 75, v4l2_frmivalenum) |
| #VIDIOC_G_ENC_INDEX = _IOR ('V', 76, v4l2_enc_idx) |
| #VIDIOC_ENCODER_CMD = _IOWR('V', 77, v4l2_encoder_cmd) |
| #VIDIOC_TRY_ENCODER_CMD = _IOWR('V', 78, v4l2_encoder_cmd) |
