Staging: easycap: Replace some global variables

New members of struct easycap take the place of undesirable global variables.

Signed-off-by: Mike Thomas <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/easycap/easycap.h

···
 #define USB_EASYCAP_VENDOR_ID	0x05e1
 #define USB_EASYCAP_PRODUCT_ID	0x0408
 
-#define EASYCAP_DRIVER_VERSION "0.8"
+#define EASYCAP_DRIVER_VERSION "0.8.2"
 #define EASYCAP_DRIVER_DESCRIPTION "easycapdc60"
 
 #define USB_SKEL_MINOR_BASE     192
···
 #define AUDIO_FRAGMENT_MANY 32
 /*---------------------------------------------------------------------------*/
 /*
+ *  IT IS ESSENTIAL THAT EVEN-NUMBERED STANDARDS ARE 25 FRAMES PER SECOND,
+ *                        ODD-NUMBERED STANDARDS ARE 30 FRAMES PER SECOND.
+ *  THE NUMBERING OF STANDARDS MUST NOT BE CHANGED WITHOUT DUE CARE.  NOT
+ *  ONLY MUST THE PARAMETER
+ *                             STANDARD_MANY
+ *  BE CHANGED TO CORRESPOND TO THE NEW NUMBER OF STANDARDS, BUT ALSO THE
+ *  NUMBERING MUST REMAIN AN UNBROKEN ASCENDING SEQUENCE:  DUMMY STANDARDS
+ *  MAY NEED TO BE ADDED.   APPROPRIATE CHANGES WILL ALWAYS BE REQUIRED IN
+ *  ROUTINE fillin_formats() AND POSSIBLY ELSEWHERE.  BEWARE.
+ */
+/*---------------------------------------------------------------------------*/
+#define  PAL_BGHIN      0
+#define  PAL_Nc         2
+#define  SECAM          4
+#define  NTSC_N         6
+#define  NTSC_N_443     8
+#define  NTSC_M         1
+#define  NTSC_443       3
+#define  NTSC_M_JP      5
+#define  PAL_60         7
+#define  PAL_M          9
+#define  STANDARD_MANY 10
+/*---------------------------------------------------------------------------*/
+/*
+ *  ENUMS
+ */
+/*---------------------------------------------------------------------------*/
+enum {
+AT_720x576,
+AT_704x576,
+AT_640x480,
+AT_720x480,
+AT_360x288,
+AT_320x240,
+AT_360x240,
+RESOLUTION_MANY
+};
+enum {
+FMT_UYVY,
+FMT_YUY2,
+FMT_RGB24,
+FMT_RGB32,
+FMT_BGR24,
+FMT_BGR32,
+PIXELFORMAT_MANY
+};
+enum {
+FIELD_NONE,
+FIELD_INTERLACED,
+FIELD_ALTERNATE,
+INTERLACE_MANY
+};
+#define SETTINGS_MANY	(STANDARD_MANY * \
+			RESOLUTION_MANY * \
+			2 * \
+			PIXELFORMAT_MANY * \
+			INTERLACE_MANY)
+/*---------------------------------------------------------------------------*/
+/*
  *  STRUCTURE DEFINITIONS
  */
 /*---------------------------------------------------------------------------*/
···
 int length;
 };
 /*---------------------------------------------------------------------------*/
+struct easycap_standard {
+__u16 mask;
+struct v4l2_standard v4l2_standard;
+};
+struct easycap_format {
+__u16 mask;
+char name[128];
+struct v4l2_format v4l2_format;
+};
+/*---------------------------------------------------------------------------*/
 /*
  *   easycap.ilk == 0   =>  CVBS+S-VIDEO HARDWARE, AUDIO wMaxPacketSize=256
  *   easycap.ilk == 2   =>  CVBS+S-VIDEO HARDWARE, AUDIO wMaxPacketSize=9
···
  */
 /*---------------------------------------------------------------------------*/
 struct easycap {
+unsigned int audio_pages_per_fragment;
+unsigned int audio_bytes_per_fragment;
+unsigned int audio_buffer_page_many;
+
+#define UPSAMPLE
+#if defined(UPSAMPLE)
+__s16 oldaudio;
+#endif /*UPSAMPLE*/
+
+struct easycap_format easycap_format[1 + SETTINGS_MANY];
 
 int ilk;
 bool microphone;
···
 struct data_buffer audio_buffer[];
 };
 /*---------------------------------------------------------------------------*/
-struct easycap_standard {
-__u16 mask;
-struct v4l2_standard v4l2_standard;
-};
-struct easycap_format {
-__u16 mask;
-char name[128];
-struct v4l2_format v4l2_format;
-};
-/*---------------------------------------------------------------------------*/
 /*
  *  VIDEO FUNCTION PROTOTYPES
  */
···
 long long int quotient;
 unsigned long long int remainder;
 } signed_div(long long int, long long int);
-/*---------------------------------------------------------------------------*/
-/*
- *  IT IS ESSENTIAL THAT EVEN-NUMBERED STANDARDS ARE 25 FRAMES PER SECOND,
- *                        ODD-NUMBERED STANDARDS ARE 30 FRAMES PER SECOND.
- *  THE NUMBERING OF STANDARDS MUST NOT BE CHANGED WITHOUT DUE CARE.  NOT
- *  ONLY MUST THE PARAMETER
- *                             STANDARD_MANY
- *  BE CHANGED TO CORRESPOND TO THE NEW NUMBER OF STANDARDS, BUT ALSO THE
- *  NUMBERING MUST REMAIN AN UNBROKEN ASCENDING SEQUENCE:  DUMMY STANDARDS
- *  MAY NEED TO BE ADDED.   APPROPRIATE CHANGES WILL ALWAYS BE REQUIRED IN
- *  ROUTINE fillin_formats() AND POSSIBLY ELSEWHERE.  BEWARE.
- */
-/*---------------------------------------------------------------------------*/
-#define  PAL_BGHIN      0
-#define  PAL_Nc         2
-#define  SECAM          4
-#define  NTSC_N         6
-#define  NTSC_N_443     8
-#define  NTSC_M         1
-#define  NTSC_443       3
-#define  NTSC_M_JP      5
-#define  PAL_60         7
-#define  PAL_M          9
-#define  STANDARD_MANY 10
-/*---------------------------------------------------------------------------*/
-/*
- *  ENUMS
- */
-/*---------------------------------------------------------------------------*/
-enum {
-AT_720x576,
-AT_704x576,
-AT_640x480,
-AT_720x480,
-AT_360x288,
-AT_320x240,
-AT_360x240,
-RESOLUTION_MANY
-};
-enum {
-FMT_UYVY,
-FMT_YUY2,
-FMT_RGB24,
-FMT_RGB32,
-FMT_BGR24,
-FMT_BGR32,
-PIXELFORMAT_MANY
-};
-enum {
-FIELD_NONE,
-FIELD_INTERLACED,
-FIELD_ALTERNATE,
-INTERLACE_MANY
-};
-#define SETTINGS_MANY	(STANDARD_MANY * \
-			RESOLUTION_MANY * \
-			2 * \
-			PIXELFORMAT_MANY * \
-			INTERLACE_MANY)
 /*---------------------------------------------------------------------------*/
 /*
  *  MACROS

drivers/staging/easycap/easycap_ioctl.c

···
 /*---------------------------------------------------------------------------*/
 int adjust_standard(struct easycap *peasycap, v4l2_std_id std_id)
 {
-struct easycap_standard *peasycap_standard;
+struct easycap_standard const *peasycap_standard;
 __u16 reg, set;
 int ir, rc, need;
 unsigned int itwas, isnow;
···
 	static int last0 = -1, last1 = -1, last2 = -1, last3 = -1;
 	static struct v4l2_standard v4l2_standard;
 	static __u32 index;
-	static struct easycap_standard *peasycap_standard;
+	static struct easycap_standard const *peasycap_standard;
 
 	JOT(8, "VIDIOC_ENUMSTD\n");
 
···
 	}
 	JOT(8, "%i=index: %s\n", index, \
 				&(peasycap_standard->v4l2_standard.name[0]));
-	peasycap_standard->v4l2_standard.index = index;
+	memcpy(&v4l2_standard, &(peasycap_standard->v4l2_standard), \
+					sizeof(struct v4l2_standard));
+
 	v4l2_standard.index = index;
 
-	if (0 != copy_to_user((void __user *)arg, \
-					&(peasycap_standard->v4l2_standard), \
+	if (0 != copy_to_user((void __user *)arg, &v4l2_standard, \
 					sizeof(struct v4l2_standard))) {
 		POUT;
 		return -EFAULT;
···
 /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 case VIDIOC_G_STD: {
 	static v4l2_std_id std_id;
-	static struct easycap_standard *peasycap_standard;
+	static struct easycap_standard const *peasycap_standard;
 
 	JOT(8, "VIDIOC_G_STD\n");
 
···
 	if (0 != copy_from_user(&incoming, (void __user *)arg, sizeof(int)))
 		return -EFAULT;
 	JOT(8, "........... %i=incoming\n", incoming);
-	incoming = audio_bytes_per_fragment;
+	incoming = peasycap->audio_bytes_per_fragment;
 	if (0 != copy_to_user((void __user *)arg, &incoming, sizeof(int)))
 		return -EFAULT;
 	break;
···
 
 	JOT(8, "SNDCTL_DSP_GETISPACE\n");
 
-	audio_buf_info.bytes      = audio_bytes_per_fragment;
+	audio_buf_info.bytes      = peasycap->audio_bytes_per_fragment;
 	audio_buf_info.fragments  = 1;
 	audio_buf_info.fragsize   = 0;
 	audio_buf_info.fragstotal = 0;

drivers/staging/easycap/easycap_ioctl.h

···
 /*****************************************************************************/
 extern struct easycap_format easycap_format[];
 extern struct v4l2_queryctrl easycap_control[];
-extern unsigned int audio_bytes_per_fragment;

drivers/staging/easycap/easycap_main.c

···
 int easycap_debug;
 module_param(easycap_debug, int, S_IRUGO | S_IWUSR);
 
-unsigned int audio_pages_per_fragment;
-unsigned int audio_bytes_per_fragment;
-unsigned int audio_buffer_page_many;
-
 /*---------------------------------------------------------------------------*/
 /*
  *  PARAMETERS APPLICABLE TO ENTIRE DRIVER, I.E. BOTH VIDEO AND AUDIO
···
 /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
 #if defined(EASYCAP_IS_VIDEODEV_CLIENT)
 #if defined(EASYCAP_NEEDS_V4L2_FOPS)
-struct v4l2_file_operations v4l2_fops = {
+const struct v4l2_file_operations v4l2_fops = {
 .owner =   THIS_MODULE,
 .open =    easycap_open_noinode,
 .release = easycap_release_noinode,
···
 /*---------------------------------------------------------------------------*/
 JOT(4, "freeing audio buffers.\n");
 lost = 0;
-for (k = 0;  k < audio_buffer_page_many;  k++) {
+for (k = 0;  k < peasycap->audio_buffer_page_many;  k++) {
 	if ((void *)NULL != peasycap->audio_buffer[k].pgo) {
 		free_page((unsigned long)(peasycap->audio_buffer[k].pgo));
 		peasycap->audio_buffer[k].pgo = (void *)NULL;
···
 			peasycap->ilk |= 0x02;
 			SAY("hardware is FOUR-CVBS\n");
 			peasycap->microphone = true;
-			audio_pages_per_fragment = 2;
+			peasycap->audio_pages_per_fragment = 2;
 		} else if (256 == peasycap->audio_isoc_maxframesize) {
 			peasycap->ilk &= ~0x02;
 			SAY("hardware is CVBS+S-VIDEO\n");
 			peasycap->microphone = false;
-			audio_pages_per_fragment = 4;
+			peasycap->audio_pages_per_fragment = 4;
 		} else {
 			SAY("hardware is unidentified:\n");
 			SAY("%i=audio_isoc_maxframesize\n", \
···
 			return -ENOENT;
 		}
 
-		audio_bytes_per_fragment = audio_pages_per_fragment * \
+		peasycap->audio_bytes_per_fragment = \
+					peasycap->audio_pages_per_fragment * \
 								PAGE_SIZE ;
-		audio_buffer_page_many = (AUDIO_FRAGMENT_MANY * \
-						audio_pages_per_fragment);
+		peasycap->audio_buffer_page_many = (AUDIO_FRAGMENT_MANY * \
+					peasycap->audio_pages_per_fragment);
 
 		JOT(4, "%6i=AUDIO_FRAGMENT_MANY\n", AUDIO_FRAGMENT_MANY);
 		JOT(4, "%6i=audio_pages_per_fragment\n", \
-						audio_pages_per_fragment);
+					peasycap->audio_pages_per_fragment);
 		JOT(4, "%6i=audio_bytes_per_fragment\n", \
-						audio_bytes_per_fragment);
-		JOT(4, "%6i=audio_buffer_page_many\n", audio_buffer_page_many);
+					peasycap->audio_bytes_per_fragment);
+		JOT(4, "%6i=audio_buffer_page_many\n", \
+					peasycap->audio_buffer_page_many);
 
 		peasycap->audio_isoc_framesperdesc = 128;
 
···
 	peasycap->purb_audio_head = &(peasycap->urb_audio_head);
 
 	JOT(4, "allocating an audio buffer\n");
-	JOT(4, ".... scattered over %i pages\n", audio_buffer_page_many);
+	JOT(4, ".... scattered over %i pages\n", \
+					peasycap->audio_buffer_page_many);
 
-	for (k = 0;  k < audio_buffer_page_many;  k++) {
+	for (k = 0;  k < peasycap->audio_buffer_page_many;  k++) {
 		if ((void *)NULL != peasycap->audio_buffer[k].pgo) {
 			SAY("ERROR: attempting to reallocate audio buffers\n");
 		} else {

drivers/staging/easycap/easycap_settings.c

···
  *                         1 => 30 fps
  */
 /*---------------------------------------------------------------------------*/
-struct easycap_standard easycap_standard[] = {
+const struct easycap_standard easycap_standard[] = {
 {
 .mask = 0x000F & PAL_BGHIN ,
 .v4l2_standard = {

drivers/staging/easycap/easycap_sound.c

···
 							"more is negative\n");
 					return;
 				}
-				if (audio_buffer_page_many <= \
+				if (peasycap->audio_buffer_page_many <= \
 							peasycap->audio_fill) {
 					SAY("ERROR: bad " \
 						"peasycap->audio_fill\n");
···
 					paudio_buffer->pto = \
 							paudio_buffer->pgo;
 					(peasycap->audio_fill)++;
-					if (audio_buffer_page_many <= \
+					if (peasycap->\
+						audio_buffer_page_many <= \
 							peasycap->audio_fill)
 						peasycap->audio_fill = 0;
 
···
 							paudio_buffer->pgo;
 
 					if (!(peasycap->audio_fill % \
+						peasycap->\
 						audio_pages_per_fragment)) {
 						JOT(12, "wakeup call on wq_" \
 						"audio, %i=frag reading  %i" \
 						"=fragment fill\n", \
 						(peasycap->audio_read / \
+						peasycap->\
 						audio_pages_per_fragment), \
 						(peasycap->audio_fill / \
+						peasycap->\
 						audio_pages_per_fragment));
 						wake_up_interruptible\
 						(&(peasycap->wq_audio));
···
 }
 /*---------------------------------------------------------------------------*/
 if ((0 > peasycap->audio_read) || \
-			(audio_buffer_page_many <= peasycap->audio_read)) {
+		(peasycap->audio_buffer_page_many <= peasycap->audio_read)) {
 	SAY("ERROR: peasycap->audio_read out of range\n");
 	return -EFAULT;
 }
···
 	return -EFAULT;
 }
 JOT(12, "before wait, %i=frag read  %i=frag fill\n", \
-		(peasycap->audio_read / audio_pages_per_fragment), \
-		(peasycap->audio_fill / audio_pages_per_fragment));
-fragment = (peasycap->audio_read / audio_pages_per_fragment);
-while ((fragment == (peasycap->audio_fill / audio_pages_per_fragment)) || \
+		(peasycap->audio_read / peasycap->audio_pages_per_fragment), \
+		(peasycap->audio_fill / peasycap->audio_pages_per_fragment));
+fragment = (peasycap->audio_read / peasycap->audio_pages_per_fragment);
+while ((fragment == (peasycap->audio_fill / \
+				peasycap->audio_pages_per_fragment)) || \
 		(0 == (PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo)))) {
 	if (file->f_flags & O_NONBLOCK) {
 		JOT(16, "returning -EAGAIN as instructed\n");
···
 	rc = wait_event_interruptible(peasycap->wq_audio, \
 		(peasycap->audio_idle  || peasycap->audio_eof   || \
 		((fragment != (peasycap->audio_fill / \
-					audio_pages_per_fragment)) && \
+				peasycap->audio_pages_per_fragment)) && \
 		(0 < (PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo))))));
 	if (0 != rc) {
 		SAY("aborted by signal\n");
···
 	}
 }
 JOT(12, "after  wait, %i=frag read  %i=frag fill\n", \
-			(peasycap->audio_read / audio_pages_per_fragment), \
-			(peasycap->audio_fill / audio_pages_per_fragment));
+		(peasycap->audio_read / peasycap->audio_pages_per_fragment), \
+		(peasycap->audio_fill / peasycap->audio_pages_per_fragment));
 szret = (size_t)0;
-while (fragment == (peasycap->audio_read / audio_pages_per_fragment)) {
+while (fragment == (peasycap->audio_read / \
+				peasycap->audio_pages_per_fragment)) {
 	if (NULL == pdata_buffer->pgo) {
 		SAY("ERROR: pdata_buffer->pgo is NULL\n");
 		return -EFAULT;
···
 	}
 	if (!kount1) {
 		(peasycap->audio_read)++;
-		if (audio_buffer_page_many <= peasycap->audio_read)
+		if (peasycap->audio_buffer_page_many <= peasycap->audio_read)
 			peasycap->audio_read = 0;
 		JOT(12, "bumped peasycap->audio_read to %i\n", \
 						peasycap->audio_read);
 
 		if (fragment != (peasycap->audio_read / \
-						audio_pages_per_fragment))
+					peasycap->audio_pages_per_fragment))
 			break;
 
 		if ((0 > peasycap->audio_read) || \
-			(audio_buffer_page_many <= peasycap->audio_read)) {
+			(peasycap->audio_buffer_page_many <= \
+					peasycap->audio_read)) {
 			SAY("ERROR: peasycap->audio_read out of range\n");
 			return -EFAULT;
 		}
···
 	kount -= (size_t)more;
 }
 JOT(12, "after  read, %i=frag read  %i=frag fill\n", \
-			(peasycap->audio_read / audio_pages_per_fragment), \
-			(peasycap->audio_fill / audio_pages_per_fragment));
+		(peasycap->audio_read / peasycap->audio_pages_per_fragment), \
+		(peasycap->audio_fill / peasycap->audio_pages_per_fragment));
 if (kount < 0) {
 	SAY("MISTAKE:  %li=kount  %li=szret\n", \
 					(long int)kount, (long int)szret);

drivers/staging/easycap/easycap_sound.h

···
 /*****************************************************************************/
 extern struct easycap *peasycap;
 extern struct usb_driver easycap_usb_driver;
-extern unsigned int audio_buffer_page_many;
-extern unsigned int audio_pages_per_fragment;