Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 358 insertions, 0 deletions

diff --git a/drivers/media/video/videocodec.h b/drivers/media/video/videocodec.h
new file mode 100644
index 000000000000..156ae57096fe
--- /dev/null
+++ b/drivers/media/video/videocodec.h
@@ -0,0 +1,358 @@
+/*
+ * VIDEO MOTION CODECs internal API for video devices
+ *
+ * Interface for MJPEG (and maybe later MPEG/WAVELETS) codec's
+ * bound to a master device.
+ *
+ * (c) 2002 Wolfgang Scherr <scherr@net4you.at>
+ *
+ * $Id: videocodec.h,v 1.1.2.4 2003/01/14 21:15:03 rbultje Exp $
+ *
+ * ------------------------------------------------------------------------
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * ------------------------------------------------------------------------
+ */
+
+/* =================== */
+/* general description */
+/* =================== */
+
+/* Should ease the (re-)usage of drivers supporting cards with (different)
+   video codecs. The codecs register to this module their functionality,
+   and the processors (masters) can attach to them if they fit.
+
+   The codecs are typically have a "strong" binding to their master - so I
+   don't think it makes sense to have a full blown interfacing as with e.g.
+   i2c. If you have an other opinion, let's discuss & implement it :-)))
+
+   Usage:
+
+   The slave has just to setup the videocodec structure and use two functions:
+   videocodec_register(codecdata);
+   videocodec_unregister(codecdata);
+   The best is just calling them at module (de-)initialisation.
+
+   The master sets up the structure videocodec_master and calls:
+   codecdata=videocodec_attach(master_codecdata);
+   videocodec_detach(codecdata);
+
+   The slave is called during attach/detach via functions setup previously
+   during register. At that time, the master_data pointer is set up
+   and the slave can access any io registers of the master device (in the case
+   the slave is bound to it). Otherwise it doesn't need this functions and
+   therfor they may not be initialized.
+
+   The other fuctions are just for convenience, as they are for shure used by
+   most/all of the codecs. The last ones may be ommited, too. 
+
+   See the structure declaration below for more information and which data has
+   to be set up for the master and the slave.
+
+   ----------------------------------------------------------------------------
+   The master should have "knowledge" of the slave and vice versa.  So the data
+   structures sent to/from slave via set_data/get_data set_image/get_image are
+   device dependent and vary between MJPEG/MPEG/WAVELET/... devices. (!!!!)
+   ----------------------------------------------------------------------------
+*/
+
+
+/* ========================================== */
+/* description of the videocodec_io structure */
+/* ========================================== */
+
+/*
+   ==== master setup ==== 
+   name -> name of the device structure for reference and debugging
+   master_data ->  data ref. for the master (e.g. the zr36055,57,67)
+   readreg -> ref. to read-fn from register (setup by master, used by slave)
+   writereg -> ref. to write-fn to register (setup by master, used by slave)
+               this two functions do the lowlevel I/O job
+
+   ==== slave functionality setup ==== 
+   slave_data -> data ref. for the slave (e.g. the zr36050,60) 
+   check -> fn-ref. checks availability of an device, returns -EIO on failure or
+            the type on success
+            this makes espcecially sense if a driver module supports more than
+            one codec which may be quite similar to access, nevertheless it
+            is good for a first functionality check 
+
+   -- main functions you always need for compression/decompression -- 
+
+   set_mode -> this fn-ref. resets the entire codec, and sets up the mode
+               with the last defined norm/size (or device default if not
+               available) - it returns 0 if the mode is possible 
+   set_size -> this fn-ref. sets the norm and image size for
+               compression/decompression (returns 0 on success) 
+               the norm param is defined in videodev.h (VIDEO_MODE_*) 
+
+   additional setup may be available, too - but the codec should work with
+   some default values even without this 
+
+   set_data -> sets device-specific data (tables, quality etc.) 
+   get_data -> query device-specific data (tables, quality etc.) 
+
+   if the device delivers interrupts, they may be setup/handled here 
+   setup_interrupt -> codec irq setup (not needed for 36050/60) 
+   handle_interrupt -> codec irq handling (not needed for 36050/60) 
+
+   if the device delivers pictures, they may be handled here 
+   put_image -> puts image data to the codec (not needed for 36050/60) 
+   get_image -> gets image data from the codec (not needed for 36050/60) 
+                the calls include frame numbers and flags (even/odd/...) 
+                if needed and a flag which allows blocking until its ready 
+*/
+
+/* ============== */
+/* user interface */
+/* ============== */
+
+/* 
+   Currently there is only a information display planned, as the layer
+   is not visible for the user space at all.
+
+   Information is available via procfs. The current entry is "/proc/videocodecs"
+   but it makes sense to "hide" it in the /proc/video tree of v4l(2) --TODO--.
+
+A example for such an output is:
+
+<S>lave or attached <M>aster name  type flags    magic    (connected as)
+S                          zr36050 0002 0000d001 00000000 (TEMPLATE)
+M                       zr36055[0] 0001 0000c001 00000000 (zr36050[0])
+M                       zr36055[1] 0001 0000c001 00000000 (zr36050[1])
+
+*/
+
+
+/* =============================================== */
+/* special defines for the videocodec_io structure */
+/* =============================================== */
+
+#ifndef __LINUX_VIDEOCODEC_H
+#define __LINUX_VIDEOCODEC_H
+
+#include <linux/videodev.h>
+
+//should be in videodev.h ??? (VID_DO_....)
+#define CODEC_DO_COMPRESSION 0
+#define CODEC_DO_EXPANSION   1
+
+/* this are the current codec flags I think they are needed */
+/*  -> type value in structure */
+#define CODEC_FLAG_JPEG      0x00000001L	// JPEG codec
+#define CODEC_FLAG_MPEG      0x00000002L	// MPEG1/2/4 codec
+#define CODEC_FLAG_DIVX      0x00000004L	// DIVX codec
+#define CODEC_FLAG_WAVELET   0x00000008L	// WAVELET codec
+					  // room for other types
+
+#define CODEC_FLAG_MAGIC     0x00000800L	// magic key must match
+#define CODEC_FLAG_HARDWARE  0x00001000L	// is a hardware codec
+#define CODEC_FLAG_VFE       0x00002000L	// has direct video frontend
+#define CODEC_FLAG_ENCODER   0x00004000L	// compression capability
+#define CODEC_FLAG_DECODER   0x00008000L	// decompression capability
+#define CODEC_FLAG_NEEDIRQ   0x00010000L	// needs irq handling
+#define CODEC_FLAG_RDWRPIC   0x00020000L	// handles picture I/O
+
+/* a list of modes, some are just examples (is there any HW?) */
+#define CODEC_MODE_BJPG      0x0001	// Baseline JPEG
+#define CODEC_MODE_LJPG      0x0002	// Lossless JPEG
+#define CODEC_MODE_MPEG1     0x0003	// MPEG 1
+#define CODEC_MODE_MPEG2     0x0004	// MPEG 2
+#define CODEC_MODE_MPEG4     0x0005	// MPEG 4
+#define CODEC_MODE_MSDIVX    0x0006	// MS DivX
+#define CODEC_MODE_ODIVX     0x0007	// Open DivX
+#define CODEC_MODE_WAVELET   0x0008	// Wavelet
+
+/* this are the current codec types I want to implement */
+/*  -> type value in structure */
+#define CODEC_TYPE_NONE    0
+#define CODEC_TYPE_L64702  1
+#define CODEC_TYPE_ZR36050 2
+#define CODEC_TYPE_ZR36016 3
+#define CODEC_TYPE_ZR36060 4
+
+/* the type of data may be enhanced by future implementations (data-fn.'s) */
+/*  -> used in command                                                     */
+#define CODEC_G_STATUS         0x0000	/* codec status (query only) */
+#define CODEC_S_CODEC_MODE     0x0001	/* codec mode (baseline JPEG, MPEG1,... */
+#define CODEC_G_CODEC_MODE     0x8001
+#define CODEC_S_VFE            0x0002	/* additional video frontend setup */
+#define CODEC_G_VFE            0x8002
+#define CODEC_S_MMAP           0x0003	/* MMAP setup (if available) */
+
+#define CODEC_S_JPEG_TDS_BYTE  0x0010	/* target data size in bytes */
+#define CODEC_G_JPEG_TDS_BYTE  0x8010
+#define CODEC_S_JPEG_SCALE     0x0011	/* scaling factor for quant. tables */
+#define CODEC_G_JPEG_SCALE     0x8011
+#define CODEC_S_JPEG_HDT_DATA  0x0018	/* huffman-tables */
+#define CODEC_G_JPEG_HDT_DATA  0x8018
+#define CODEC_S_JPEG_QDT_DATA  0x0019	/* quantizing-tables */
+#define CODEC_G_JPEG_QDT_DATA  0x8019
+#define CODEC_S_JPEG_APP_DATA  0x001A	/* APP marker */
+#define CODEC_G_JPEG_APP_DATA  0x801A
+#define CODEC_S_JPEG_COM_DATA  0x001B	/* COM marker */
+#define CODEC_G_JPEG_COM_DATA  0x801B
+
+#define CODEC_S_PRIVATE        0x1000	/* "private" commands start here */
+#define CODEC_G_PRIVATE        0x9000
+
+#define CODEC_G_FLAG           0x8000	/* this is how 'get' is detected */
+
+/* types of transfer, directly user space or a kernel buffer (image-fn.'s) */
+/*  -> used in get_image, put_image                                        */
+#define CODEC_TRANSFER_KERNEL 0	/* use "memcopy" */
+#define CODEC_TRANSFER_USER   1	/* use "to/from_user" */
+
+
+/* ========================= */
+/* the structures itself ... */
+/* ========================= */
+
+struct vfe_polarity {
+	int vsync_pol:1;
+	int hsync_pol:1;
+	int field_pol:1;
+	int blank_pol:1;
+	int subimg_pol:1;
+	int poe_pol:1;
+	int pvalid_pol:1;
+	int vclk_pol:1;
+};
+
+struct vfe_settings {
+	__u32 x, y;		/* Offsets into image */
+	__u32 width, height;	/* Area to capture */
+	__u16 decimation;	/* Decimation divider */
+	__u16 flags;		/* Flags for capture */
+/* flags are the same as in struct video_capture - see videodev.h:
+#define VIDEO_CAPTURE_ODD		0
+#define VIDEO_CAPTURE_EVEN		1
+*/
+	__u16 quality;		/* quality of the video */
+};
+
+struct tvnorm {
+	u16 Wt, Wa, HStart, HSyncStart, Ht, Ha, VStart;
+};
+
+struct jpeg_com_marker {
+	int len; /* number of usable bytes in data */
+	char data[60];
+};
+
+struct jpeg_app_marker {
+	int appn; /* number app segment */
+	int len; /* number of usable bytes in data */
+	char data[60];
+};
+
+struct videocodec {
+	struct module *owner;
+	/* -- filled in by slave device during register -- */
+	char name[32];
+	unsigned long magic;	/* may be used for client<->master attaching */
+	unsigned long flags;	/* functionality flags */
+	unsigned int type;	/* codec type */
+
+	/* -- these is filled in later during master device attach -- */
+
+	struct videocodec_master *master_data;
+
+	/* -- these are filled in by the slave device during register -- */
+
+	void *data;		/* private slave data */
+
+	/* attach/detach client functions (indirect call) */
+	int (*setup) (struct videocodec * codec);
+	int (*unset) (struct videocodec * codec);
+
+	/* main functions, every client needs them for sure! */
+	// set compression or decompression (or freeze, stop, standby, etc)
+	int (*set_mode) (struct videocodec * codec,
+			 int mode);
+	// setup picture size and norm (for the codec's video frontend)
+	int (*set_video) (struct videocodec * codec,
+			  struct tvnorm * norm,
+			  struct vfe_settings * cap,
+			  struct vfe_polarity * pol);
+	// other control commands, also mmap setup etc.
+	int (*control) (struct videocodec * codec,
+			int type,
+			int size,
+			void *data);
+
+	/* additional setup/query/processing (may be NULL pointer) */
+	// interrupt setup / handling (for irq's delivered by master)
+	int (*setup_interrupt) (struct videocodec * codec,
+				long mode);
+	int (*handle_interrupt) (struct videocodec * codec,
+				 int source,
+				 long flag);
+	// picture interface (if any)
+	long (*put_image) (struct videocodec * codec,
+			   int tr_type,
+			   int block,
+			   long *fr_num,
+			   long *flag,
+			   long size,
+			   void *buf);
+	long (*get_image) (struct videocodec * codec,
+			   int tr_type,
+			   int block,
+			   long *fr_num,
+			   long *flag,
+			   long size,
+			   void *buf);
+};
+
+struct videocodec_master {
+	/* -- filled in by master device for registration -- */
+	char name[32];
+	unsigned long magic;	/* may be used for client<->master attaching */
+	unsigned long flags;	/* functionality flags */
+	unsigned int type;	/* master type */
+
+	void *data;		/* private master data */
+
+	 __u32(*readreg) (struct videocodec * codec,
+			  __u16 reg);
+	void (*writereg) (struct videocodec * codec,
+			  __u16 reg,
+			  __u32 value);
+};
+
+
+/* ================================================= */
+/* function prototypes of the master/slave interface */
+/* ================================================= */
+
+/* attach and detach commands for the master */
+// * master structure needs to be kmalloc'ed before calling attach
+//   and free'd after calling detach
+// * returns pointer on success, NULL on failure
+extern struct videocodec *videocodec_attach(struct videocodec_master *);
+// * 0 on success, <0 (errno) on failure
+extern int videocodec_detach(struct videocodec *);
+
+/* register and unregister commands for the slaves */
+// * 0 on success, <0 (errno) on failure
+extern int videocodec_register(const struct videocodec *);
+// * 0 on success, <0 (errno) on failure
+extern int videocodec_unregister(const struct videocodec *);
+
+/* the other calls are directly done via the videocodec structure! */
+
+#endif				/*ifndef __LINUX_VIDEOCODEC_H */