X-Git-Url: https://git.ao2.it/gspca_kinect.git/blobdiff_plain/71340e51fc094a564c462be235d36cf7ae3fac10..f5a99617c62f84c42defbc3d0cdcbb4c858f9c51:/kinect.c?ds=inline

diff --git a/kinect.c b/kinect.c
index 0d8acda..2028c64 100644
--- a/kinect.c
+++ b/kinect.c
@@ -5,7 +5,10 @@
  *
  * Based on the OpenKinect project and libfreenect
  * http://openkinect.org/wiki/Init_Analysis
- * 
+ *
+ * Special thanks to Steven Toth and kernellabs.com for sponsoring a Kinect
+ * sensor device which I tested the driver on.
+ *
  * 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
@@ -47,17 +50,20 @@ struct pkt_hdr {
 	uint32_t timestamp;
 };
 
-typedef struct {
+struct cam_hdr {
 	uint8_t magic[2];
 	uint16_t len;
 	uint16_t cmd;
 	uint16_t tag;
-} cam_hdr;
+};
 
 /* specific webcam descriptor */
 struct sd {
-	struct gspca_dev gspca_dev;	/* !! must be the first item */
-	uint16_t cam_tag;
+	struct gspca_dev gspca_dev; /* !! must be the first item */
+	uint16_t cam_tag;           /* a sequence number for packets */
+	uint8_t stream_flag;        /* to identify different stream types */
+	uint8_t obuf[0x400];        /* output buffer for control commands */
+	uint8_t ibuf[0x200];        /* input buffer for control commands */
 };
 
 /* V4L2 controls supported by the driver */
@@ -104,7 +110,8 @@ static const struct v4l2_pix_format video_camera_mode[] = {
 	 .priv = MODE_1280x1024 | FORMAT_Y10B},
 };
 
-static int kinect_write(struct usb_device *udev, uint8_t *data, uint16_t wLength)
+static int kinect_write(struct usb_device *udev, uint8_t *data,
+			uint16_t wLength)
 {
 	return usb_control_msg(udev,
 			      usb_sndctrlpipe(udev, 0),
@@ -128,10 +135,10 @@ static int send_cmd(struct gspca_dev *gspca_dev, uint16_t cmd, void *cmdbuf,
 	struct sd *sd = (struct sd *) gspca_dev;
 	struct usb_device *udev = gspca_dev->dev;
 	int res, actual_len;
-	uint8_t obuf[0x400];
-	uint8_t ibuf[0x200];
-	cam_hdr *chdr = (void*)obuf;
-	cam_hdr *rhdr = (void*)ibuf;
+	uint8_t *obuf = sd->obuf;
+	uint8_t *ibuf = sd->ibuf;
+	struct cam_hdr *chdr = (void *)obuf;
+	struct cam_hdr *rhdr = (void *)ibuf;
 
 	if (cmd_len & 1 || cmd_len > (0x400 - sizeof(*chdr))) {
 		err("send_cmd: Invalid command length (0x%x)", cmd_len);
@@ -147,7 +154,8 @@ static int send_cmd(struct gspca_dev *gspca_dev, uint16_t cmd, void *cmdbuf,
 	memcpy(obuf+sizeof(*chdr), cmdbuf, cmd_len);
 
 	res = kinect_write(udev, obuf, cmd_len + sizeof(*chdr));
-	PDEBUG(D_USBO, "Control cmd=%04x tag=%04x len=%04x: %d", cmd, sd->cam_tag, cmd_len, res);
+	PDEBUG(D_USBO, "Control cmd=%04x tag=%04x len=%04x: %d", cmd,
+		sd->cam_tag, cmd_len, res);
 	if (res < 0) {
 		err("send_cmd: Output control transfer failed (%d)", res);
 		return res;
@@ -164,7 +172,8 @@ static int send_cmd(struct gspca_dev *gspca_dev, uint16_t cmd, void *cmdbuf,
 	actual_len -= sizeof(*rhdr);
 
 	if (rhdr->magic[0] != 0x52 || rhdr->magic[1] != 0x42) {
-		err("send_cmd: Bad magic %02x %02x", rhdr->magic[0], rhdr->magic[1]);
+		err("send_cmd: Bad magic %02x %02x", rhdr->magic[0],
+			rhdr->magic[1]);
 		return -1;
 	}
 	if (rhdr->cmd != chdr->cmd) {
@@ -194,7 +203,8 @@ static int send_cmd(struct gspca_dev *gspca_dev, uint16_t cmd, void *cmdbuf,
 	return actual_len;
 }
 
-static int write_register(struct gspca_dev *gspca_dev, uint16_t reg, uint16_t data)
+static int write_register(struct gspca_dev *gspca_dev, uint16_t reg,
+			uint16_t data)
 {
 	uint16_t reply[2];
 	uint16_t cmd[2];
@@ -223,13 +233,20 @@ static int sd_config(struct gspca_dev *gspca_dev,
 
 	sd->cam_tag = 0;
 
+	/* Only video stream is supported for now,
+	 * which has stream flag = 0x80 */
+	sd->stream_flag = 0x80;
+
 	cam = &gspca_dev->cam;
 
 	cam->cam_mode = video_camera_mode;
 	cam->nmodes = ARRAY_SIZE(video_camera_mode);
 
-	//cam->npkt = 15;
-	//gspca_dev->pkt_size = 960 * 2;
+#if 0
+	/* Setting those values is not needed for video stream */
+	cam->npkt = 15;
+	gspca_dev->pkt_size = 960 * 2;
+#endif
 
 	return 0;
 }
@@ -316,27 +333,27 @@ static int sd_start(struct gspca_dev *gspca_dev)
 
 static void sd_stopN(struct gspca_dev *gspca_dev)
 {
-	write_register(gspca_dev, 0x05, 0x00); // reset video stream
+	/* reset video stream */
+	write_register(gspca_dev, 0x05, 0x00);
 }
 
 static void sd_pkt_scan(struct gspca_dev *gspca_dev, u8 *__data, int len)
 {
-	//struct sd *sd = (struct sd *) gspca_dev;
-	
-	struct pkt_hdr *hdr = (void*)__data;
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	struct pkt_hdr *hdr = (void *)__data;
 	uint8_t *data = __data + sizeof(*hdr);
 	int datalen = len - sizeof(*hdr);
 
-	/* strm->flag == 0x80 for the color camera stream */
-	uint8_t sof = 0x80 | 1;
-	uint8_t mof = 0x80 | 2;
-	uint8_t eof = 0x80 | 5;
+	uint8_t sof = sd->stream_flag | 1;
+	uint8_t mof = sd->stream_flag | 2;
+	uint8_t eof = sd->stream_flag | 5;
 
 	if (len < 12)
 		return;
 
 	if (hdr->magic[0] != 'R' || hdr->magic[1] != 'B') {
-		warn("[Stream %02x] Invalid magic %02x%02x", 0x80, //strm->flag
+		warn("[Stream %02x] Invalid magic %02x%02x", sd->stream_flag,
 				hdr->magic[0], hdr->magic[1]);
 		return;
 	}
@@ -347,11 +364,11 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, u8 *__data, int len)
 	else if (hdr->flag == mof)
 		gspca_frame_add(gspca_dev, INTER_PACKET, data, datalen);
 
-	else if(hdr->flag == eof)
+	else if (hdr->flag == eof)
 		gspca_frame_add(gspca_dev, LAST_PACKET, data, datalen);
 
 	else
-		warn("Not recognized...");
+		warn("Packet type not recognized...");
 }
 
 /* sub-driver description */