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Commit e5bd0260 authored by Michael Schimek's avatar Michael Schimek Committed by Mauro Carvalho Chehab
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V4L/DVB (5077): Bttv cropping support 

Adds the missing VIDIOC_CROPCAP, G_CROP and S_CROP ioctls, permitting 
applications to capture or overlay a subsection of the picture or to 
extend the capture window beyond active video, into the VBI area and the 
horizontal blanking. VBI capturing can start and end on any line, 
including the picture area, and apps can capture different lines of each 
field and single fields.
For compatibility with existing applications, the open() function
resets the cropping and VBI capturing parameters and a VIDIOC_S_CROP
call is necessary to actually enable cropping. 
Regrettably in PAL-M, PAL-N, PAL-Nc and NTSC-JP mode the maximum image 
width will increase from 640 and 768 to 747 and 923 pixels respectively.
Like the VBI changes however, this should only affect applications which 
depend on former driver limitations, such as never getting more than 640 
pixels regardless of the requested width. 
Also, new freedoms require additional checks for conflicts and some 
applications may not expect an EBUSY error from the VIDIOC_QBUF and 
VIDIOCMCAPTURE ioctls. These errors should be rare though.
So far, the patch has been tested on a UP machine with a bt878 in PAL-
BGHI and NTSC-M mode using xawtv, tvtime, mplayer/mencoder, zapping/
libzvbi and these tools: http://zapping.sf.net/bttv-crop-test.tar.bz2
I'd be grateful about comments or bug reports.
Signed-off-by: default avatarMichael H. Schimek <mschimek@gmx.at>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent 13071f0a
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Showing with 1278 additions and 238 deletions
drivers/media/video/bt8xx/bttv-driver.c
View file @ e5bd0260
......@@ -9,6 +9,10 @@
some v4l2 code lines are taken from Justin's bttv2 driver which is
(c) 2000 Justin Schoeman <justin@suntiger.ee.up.ac.za>
Cropping and overscan support
Copyright (C) 2005, 2006 Michael H. Schimek <mschimek@gmx.at>
Sponsored by OPQ Systems AB
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
......@@ -64,6 +68,7 @@ static unsigned int radio[BTTV_MAX];
static unsigned int irq_debug;
static unsigned int gbuffers = 8;
static unsigned int gbufsize = 0x208000;
static unsigned int reset_crop = 1;
static int video_nr = -1;
static int radio_nr = -1;
......@@ -103,6 +108,7 @@ module_param(radio_nr, int, 0444);
module_param(vbi_nr, int, 0444);
module_param(gbuffers, int, 0444);
module_param(gbufsize, int, 0444);
module_param(reset_crop, int, 0444);
module_param(v4l2, int, 0644);
module_param(bigendian, int, 0644);
......@@ -129,6 +135,8 @@ MODULE_PARM_DESC(bttv_debug,"debug messages, default is 0 (no)");
MODULE_PARM_DESC(irq_debug,"irq handler debug messages, default is 0 (no)");
MODULE_PARM_DESC(gbuffers,"number of capture buffers. range 2-32, default 8");
MODULE_PARM_DESC(gbufsize,"size of the capture buffers, default is 0x208000");
MODULE_PARM_DESC(reset_crop,"reset cropping parameters at open(), default "
"is 1 (yes) for compatibility with older applications");
MODULE_PARM_DESC(automute,"mute audio on bad/missing video signal, default is 1 (yes)");
MODULE_PARM_DESC(chroma_agc,"enables the AGC of chroma signal, default is 0 (no)");
MODULE_PARM_DESC(adc_crush,"enables the luminance ADC crush, default is 1 (yes)");
......@@ -192,6 +200,33 @@ static u8 SRAM_Table[][60] =
}
};
/* minhdelayx1 first video pixel we can capture on a line and
hdelayx1 start of active video, both relative to rising edge of
/HRESET pulse (0H) in 1 / fCLKx1.
swidth width of active video and
totalwidth total line width, both in 1 / fCLKx1.
sqwidth total line width in square pixels.
vdelay start of active video in 2 * field lines relative to
trailing edge of /VRESET pulse (VDELAY register).
sheight height of active video in 2 * field lines.
videostart0 ITU-R frame line number of the line corresponding
to vdelay in the first field. */
#define CROPCAP(minhdelayx1, hdelayx1, swidth, totalwidth, sqwidth, \
vdelay, sheight, videostart0) \
.cropcap.bounds.left = minhdelayx1, \
/* * 2 because vertically we count field lines times two, */ \
/* e.g. 23 * 2 to 23 * 2 + 576 in PAL-BGHI defrect. */ \
.cropcap.bounds.top = (videostart0) * 2 - (vdelay) + MIN_VDELAY, \
/* 4 is a safety margin at the end of the line. */ \
.cropcap.bounds.width = (totalwidth) - (minhdelayx1) - 4, \
.cropcap.bounds.height = (sheight) + (vdelay) - MIN_VDELAY, \
.cropcap.defrect.left = hdelayx1, \
.cropcap.defrect.top = (videostart0) * 2, \
.cropcap.defrect.width = swidth, \
.cropcap.defrect.height = sheight, \
.cropcap.pixelaspect.numerator = totalwidth, \
.cropcap.pixelaspect.denominator = sqwidth,
const struct bttv_tvnorm bttv_tvnorms[] = {
/* PAL-BDGHI */
/* max. active video is actually 922, but 924 is divisible by 4 and 3! */
......@@ -210,11 +245,26 @@ const struct bttv_tvnorm bttv_tvnorms[] = {
.hdelayx1 = 186,
.hactivex1 = 924,
.vdelay = 0x20,
.vbipack = 255,
.vbipack = 255, /* min (2048 / 4, 0x1ff) & 0xff */
.sram = 0,
/* ITU-R frame line number of the first VBI line
we can capture, of the first and second field. */
.vbistart = { 7,320 },
we can capture, of the first and second field.
The last line is determined by cropcap.bounds. */
.vbistart = { 7, 320 },
CROPCAP(/* minhdelayx1 */ 68,
/* hdelayx1 */ 186,
/* Should be (768 * 1135 + 944 / 2) / 944.
cropcap.defrect is used for image width
checks, so we keep the old value 924. */
/* swidth */ 924,
/* totalwidth */ 1135,
/* sqwidth */ 944,
/* vdelay */ 0x20,
/* sheight */ 576,
/* videostart0 */ 23)
/* bt878 (and bt848?) can capture another
line below active video. */
.cropcap.bounds.height = (576 + 2) + 0x20 - 2,
},{
.v4l2_id = V4L2_STD_NTSC_M | V4L2_STD_NTSC_M_KR,
.name = "NTSC",
......@@ -229,9 +279,18 @@ const struct bttv_tvnorm bttv_tvnorms[] = {
.hdelayx1 = 128,
.hactivex1 = 910,
.vdelay = 0x1a,
.vbipack = 144,
.vbipack = 144, /* min (1600 / 4, 0x1ff) & 0xff */
.sram = 1,
.vbistart = { 10, 273 },
CROPCAP(/* minhdelayx1 */ 68,
/* hdelayx1 */ 128,
/* Should be (640 * 910 + 780 / 2) / 780? */
/* swidth */ 768,
/* totalwidth */ 910,
/* sqwidth */ 780,
/* vdelay */ 0x1a,
/* sheight */ 480,
/* videostart0 */ 23)
},{
.v4l2_id = V4L2_STD_SECAM,
.name = "SECAM",
......@@ -249,6 +308,14 @@ const struct bttv_tvnorm bttv_tvnorms[] = {
.vbipack = 255,
.sram = 0, /* like PAL, correct? */
.vbistart = { 7, 320 },
CROPCAP(/* minhdelayx1 */ 68,
/* hdelayx1 */ 186,
/* swidth */ 924,
/* totalwidth */ 1135,
/* sqwidth */ 944,
/* vdelay */ 0x20,
/* sheight */ 576,
/* videostart0 */ 23)
},{
.v4l2_id = V4L2_STD_PAL_Nc,
.name = "PAL-Nc",
......@@ -266,6 +333,14 @@ const struct bttv_tvnorm bttv_tvnorms[] = {
.vbipack = 144,
.sram = -1,
.vbistart = { 7, 320 },
CROPCAP(/* minhdelayx1 */ 68,
/* hdelayx1 */ 130,
/* swidth */ (640 * 910 + 780 / 2) / 780,
/* totalwidth */ 910,
/* sqwidth */ 780,
/* vdelay */ 0x1a,
/* sheight */ 576,
/* videostart0 */ 23)
},{
.v4l2_id = V4L2_STD_PAL_M,
.name = "PAL-M",
......@@ -283,6 +358,14 @@ const struct bttv_tvnorm bttv_tvnorms[] = {
.vbipack = 144,
.sram = -1,
.vbistart = { 10, 273 },
CROPCAP(/* minhdelayx1 */ 68,
/* hdelayx1 */ 135,
/* swidth */ (640 * 910 + 780 / 2) / 780,
/* totalwidth */ 910,
/* sqwidth */ 780,
/* vdelay */ 0x1a,
/* sheight */ 480,
/* videostart0 */ 23)
},{
.v4l2_id = V4L2_STD_PAL_N,
.name = "PAL-N",
......@@ -299,7 +382,15 @@ const struct bttv_tvnorm bttv_tvnorms[] = {
.vdelay = 0x20,
.vbipack = 144,
.sram = -1,
.vbistart = { 7, 320},
.vbistart = { 7, 320 },
CROPCAP(/* minhdelayx1 */ 68,
/* hdelayx1 */ 186,
/* swidth */ (768 * 1135 + 944 / 2) / 944,
/* totalwidth */ 1135,
/* sqwidth */ 944,
/* vdelay */ 0x20,
/* sheight */ 576,
/* videostart0 */ 23)
},{
.v4l2_id = V4L2_STD_NTSC_M_JP,
.name = "NTSC-JP",
......@@ -316,7 +407,15 @@ const struct bttv_tvnorm bttv_tvnorms[] = {
.vdelay = 0x16,
.vbipack = 144,
.sram = -1,
.vbistart = {10, 273},
.vbistart = { 10, 273 },
CROPCAP(/* minhdelayx1 */ 68,
/* hdelayx1 */ 135,
/* swidth */ (640 * 910 + 780 / 2) / 780,
/* totalwidth */ 910,
/* sqwidth */ 780,
/* vdelay */ 0x16,
/* sheight */ 480,
/* videostart0 */ 23)
},{
/* that one hopefully works with the strange timing
* which video recorders produce when playing a NTSC
......@@ -338,6 +437,14 @@ const struct bttv_tvnorm bttv_tvnorms[] = {
.vtotal = 524,
.sram = -1,
.vbistart = { 10, 273 },
CROPCAP(/* minhdelayx1 */ 68,
/* hdelayx1 */ 186,
/* swidth */ 924,
/* totalwidth */ 1135,
/* sqwidth */ 944,
/* vdelay */ 0x1a,
/* sheight */ 480,
/* videostart0 */ 23)
}
};
static const unsigned int BTTV_TVNORMS = ARRAY_SIZE(bttv_tvnorms);
......@@ -678,25 +785,89 @@ static const int BTTV_CTLS = ARRAY_SIZE(bttv_ctls);
/* ----------------------------------------------------------------------- */
/* resource management */
/*
RESOURCE_ allocated by freed by
VIDEO_READ bttv_read 1) bttv_read 2)
VIDEO_STREAM VIDIOC_STREAMON VIDIOC_STREAMOFF
VIDIOC_QBUF 1) bttv_release
VIDIOCMCAPTURE 1)
OVERLAY VIDIOCCAPTURE on VIDIOCCAPTURE off
VIDIOC_OVERLAY on VIDIOC_OVERLAY off
3) bttv_release
VBI VIDIOC_STREAMON VIDIOC_STREAMOFF
VIDIOC_QBUF 1) bttv_release
bttv_read, bttv_poll 1) 4)
1) The resource must be allocated when we enter buffer prepare functions
and remain allocated while buffers are in the DMA queue.
2) This is a single frame read.
3) VIDIOC_S_FBUF and VIDIOC_S_FMT (OVERLAY) still work when
RESOURCE_OVERLAY is allocated.
4) This is a continuous read, implies VIDIOC_STREAMON.
Note this driver permits video input and standard changes regardless if
resources are allocated.
*/
#define VBI_RESOURCES (RESOURCE_VBI)
#define VIDEO_RESOURCES (RESOURCE_VIDEO_READ | \
RESOURCE_VIDEO_STREAM | \
RESOURCE_OVERLAY)
static
int check_alloc_btres(struct bttv *btv, struct bttv_fh *fh, int bit)
{
int xbits; /* mutual exclusive resources */
if (fh->resources & bit)
/* have it already allocated */
return 1;
xbits = bit;
if (bit & (RESOURCE_VIDEO_READ | RESOURCE_VIDEO_STREAM))
xbits |= RESOURCE_VIDEO_READ | RESOURCE_VIDEO_STREAM;
/* is it free? */
mutex_lock(&btv->reslock);
if (btv->resources & bit) {
mutex_lock(&btv->lock);
if (btv->resources & xbits) {
/* no, someone else uses it */
mutex_unlock(&btv->reslock);
return 0;
goto fail;
}
if ((bit & VIDEO_RESOURCES)
&& 0 == (btv->resources & VIDEO_RESOURCES)) {
/* Do crop - use current, don't - use default parameters. */
__s32 top = btv->crop[!!fh->do_crop].rect.top;
if (btv->vbi_end > top)
goto fail;
/* We cannot capture the same line as video and VBI data.
Claim scan lines crop[].rect.top to bottom. */
btv->crop_start = top;
} else if (bit & VBI_RESOURCES) {
__s32 end = fh->vbi_fmt.end;
if (end > btv->crop_start)
goto fail;
/* Claim scan lines above fh->vbi_fmt.end. */
btv->vbi_end = end;
}
/* it's free, grab it */
fh->resources |= bit;
btv->resources |= bit;
mutex_unlock(&btv->reslock);
mutex_unlock(&btv->lock);
return 1;
fail:
mutex_unlock(&btv->lock);
return 0;
}
static
......@@ -711,6 +882,35 @@ int locked_btres(struct bttv *btv, int bit)
return (btv->resources & bit);
}
/* Call with btv->lock down. */
static void
disclaim_vbi_lines(struct bttv *btv)
{
btv->vbi_end = 0;
}
/* Call with btv->lock down. */
static void
disclaim_video_lines(struct bttv *btv)
{
const struct bttv_tvnorm *tvnorm;
u8 crop;
tvnorm = &bttv_tvnorms[btv->tvnorm];
btv->crop_start = tvnorm->cropcap.bounds.top
+ tvnorm->cropcap.bounds.height;
/* VBI capturing ends at VDELAY, start of video capturing, no
matter how many lines the VBI RISC program expects. When video
capturing is off, it shall no longer "preempt" VBI capturing,
so we set VDELAY to maximum. */
crop = btread(BT848_E_CROP) | 0xc0;
btwrite(crop, BT848_E_CROP);
btwrite(0xfe, BT848_E_VDELAY_LO);
btwrite(crop, BT848_O_CROP);
btwrite(0xfe, BT848_O_VDELAY_LO);
}
static
void free_btres(struct bttv *btv, struct bttv_fh *fh, int bits)
{
......@@ -718,10 +918,19 @@ void free_btres(struct bttv *btv, struct bttv_fh *fh, int bits)
/* trying to free ressources not allocated by us ... */
printk("bttv: BUG! (btres)\n");
}
mutex_lock(&btv->reslock);
mutex_lock(&btv->lock);
fh->resources &= ~bits;
btv->resources &= ~bits;
mutex_unlock(&btv->reslock);
bits = btv->resources;
if (0 == (bits & VIDEO_RESOURCES))
disclaim_video_lines(btv);
if (0 == (bits & VBI_RESOURCES))
disclaim_vbi_lines(btv);
mutex_unlock(&btv->lock);
}
/* ----------------------------------------------------------------------- */
......@@ -1030,6 +1239,36 @@ i2c_vidiocschan(struct bttv *btv)
bttv_tda9880_setnorm(btv,btv->tvnorm);
}
static void
bttv_crop_calc_limits(struct bttv_crop *c)
{
/* Scale factor min. 1:1, max. 16:1. Min. image size
48 x 32. Scaled width must be a multiple of 4. */
if (1) {
/* For bug compatibility with VIDIOCGCAP and image
size checks in earlier driver versions. */
c->min_scaled_width = 48;
c->min_scaled_height = 32;
} else {
c->min_scaled_width =
(max(48, c->rect.width >> 4) + 3) & ~3;
c->min_scaled_height =
max(32, c->rect.height >> 4);
}
c->max_scaled_width = c->rect.width & ~3;
c->max_scaled_height = c->rect.height;
}
static void
bttv_crop_reset(struct bttv_crop *c, int norm)
{
c->rect = bttv_tvnorms[norm].cropcap.defrect;
bttv_crop_calc_limits(c);
}
/* Call with btv->lock down. */
static int
set_tvnorm(struct bttv *btv, unsigned int norm)
{
......@@ -1038,9 +1277,24 @@ set_tvnorm(struct bttv *btv, unsigned int norm)
if (norm < 0 || norm >= BTTV_TVNORMS)
return -EINVAL;
btv->tvnorm = norm;
tvnorm = &bttv_tvnorms[norm];
if (btv->tvnorm < 0 ||
btv->tvnorm >= BTTV_TVNORMS ||
0 != memcmp(&bttv_tvnorms[btv->tvnorm].cropcap,
&tvnorm->cropcap,
sizeof (tvnorm->cropcap))) {
bttv_crop_reset(&btv->crop[0], norm);
btv->crop[1] = btv->crop[0]; /* current = default */
if (0 == (btv->resources & VIDEO_RESOURCES)) {
btv->crop_start = tvnorm->cropcap.bounds.top
+ tvnorm->cropcap.bounds.height;
}
}
btv->tvnorm = norm;
btwrite(tvnorm->adelay, BT848_ADELAY);
btwrite(tvnorm->bdelay, BT848_BDELAY);
btaor(tvnorm->iform,~(BT848_IFORM_NORM|BT848_IFORM_XTBOTH),
......@@ -1057,6 +1311,7 @@ set_tvnorm(struct bttv *btv, unsigned int norm)
return 0;
}
/* Call with btv->lock down. */
static void
set_input(struct bttv *btv, unsigned int input)
{
......@@ -1459,13 +1714,13 @@ bttv_switch_overlay(struct bttv *btv, struct bttv_fh *fh,
btv->loop_irq |= 1;
bttv_set_dma(btv, 0x03);
spin_unlock_irqrestore(&btv->s_lock,flags);
if (NULL == new)
free_btres(btv,fh,RESOURCE_OVERLAY);
if (NULL != old) {
dprintk("switch_overlay: old=%p state is %d\n",old,old->vb.state);
bttv_dma_free(&fh->cap,btv, old);
kfree(old);
}
if (NULL == new)
free_btres(btv,fh,RESOURCE_OVERLAY);
dprintk("switch_overlay: done\n");
return retval;
}
......@@ -1479,7 +1734,10 @@ static int bttv_prepare_buffer(struct videobuf_queue *q,struct bttv *btv,
unsigned int width, unsigned int height,
enum v4l2_field field)
{
struct bttv_fh *fh = q->priv_data;
int redo_dma_risc = 0;
struct bttv_crop c;
int norm;
int rc;
/* check settings */
......@@ -1491,12 +1749,52 @@ static int bttv_prepare_buffer(struct videobuf_queue *q,struct bttv *btv,
if (width*height > buf->vb.bsize)
return -EINVAL;
buf->vb.size = buf->vb.bsize;
/* Make sure tvnorm and vbi_end remain consistent
until we're done. */
mutex_lock(&btv->lock);
norm = btv->tvnorm;
/* In this mode capturing always starts at defrect.top
(default VDELAY), ignoring cropping parameters. */
if (btv->vbi_end > bttv_tvnorms[norm].cropcap.defrect.top) {
mutex_unlock(&btv->lock);
return -EINVAL;
}
mutex_unlock(&btv->lock);
c.rect = bttv_tvnorms[norm].cropcap.defrect;
} else {
if (width < 48 ||
height < 32 ||
width > bttv_tvnorms[btv->tvnorm].swidth ||
height > bttv_tvnorms[btv->tvnorm].sheight)
mutex_lock(&btv->lock);
norm = btv->tvnorm;
c = btv->crop[!!fh->do_crop];
mutex_unlock(&btv->lock);
if (width < c.min_scaled_width ||
width > c.max_scaled_width ||
height < c.min_scaled_height)
return -EINVAL;
switch (field) {
case V4L2_FIELD_TOP:
case V4L2_FIELD_BOTTOM:
case V4L2_FIELD_ALTERNATE:
/* btv->crop counts frame lines. Max. scale
factor is 16:1 for frames, 8:1 for fields. */
if (height * 2 > c.max_scaled_height)
return -EINVAL;
break;
default:
if (height > c.max_scaled_height)
return -EINVAL;
break;
}
buf->vb.size = (width * height * fmt->depth) >> 3;
if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
return -EINVAL;
......@@ -1505,12 +1803,17 @@ static int bttv_prepare_buffer(struct videobuf_queue *q,struct bttv *btv,
/* alloc + fill struct bttv_buffer (if changed) */
if (buf->vb.width != width || buf->vb.height != height ||
buf->vb.field != field ||
buf->tvnorm != btv->tvnorm || buf->fmt != fmt) {
buf->tvnorm != norm || buf->fmt != fmt ||
buf->crop.top != c.rect.top ||
buf->crop.left != c.rect.left ||
buf->crop.width != c.rect.width ||
buf->crop.height != c.rect.height) {
buf->vb.width = width;
buf->vb.height = height;
buf->vb.field = field;
buf->tvnorm = btv->tvnorm;
buf->tvnorm = norm;
buf->fmt = fmt;
buf->crop = c.rect;
redo_dma_risc = 1;
}
......@@ -1939,11 +2242,179 @@ static int bttv_common_ioctls(struct bttv *btv, unsigned int cmd, void *arg)
return 0;
}
static int verify_window(const struct bttv_tvnorm *tvn,
struct v4l2_window *win, int fixup)
/* Given cropping boundaries b and the scaled width and height of a
single field or frame, which must not exceed hardware limits, this
function adjusts the cropping parameters c. */
static void
bttv_crop_adjust (struct bttv_crop * c,
const struct v4l2_rect * b,
__s32 width,
__s32 height,
enum v4l2_field field)
{
__s32 frame_height = height << !V4L2_FIELD_HAS_BOTH(field);
__s32 max_left;
__s32 max_top;
if (width < c->min_scaled_width) {
/* Max. hor. scale factor 16:1. */
c->rect.width = width * 16;
} else if (width > c->max_scaled_width) {
/* Min. hor. scale factor 1:1. */
c->rect.width = width;
max_left = b->left + b->width - width;
max_left = min(max_left, (__s32) MAX_HDELAY);
if (c->rect.left > max_left)
c->rect.left = max_left;
}
if (height < c->min_scaled_height) {
/* Max. vert. scale factor 16:1, single fields 8:1. */
c->rect.height = height * 16;
} else if (frame_height > c->max_scaled_height) {
/* Min. vert. scale factor 1:1.
Top and height count field lines times two. */
c->rect.height = (frame_height + 1) & ~1;
max_top = b->top + b->height - c->rect.height;
if (c->rect.top > max_top)
c->rect.top = max_top;
}
bttv_crop_calc_limits(c);
}
/* Returns an error if scaling to a frame or single field with the given
width and height is not possible with the current cropping parameters
and width aligned according to width_mask. If adjust_size is TRUE the
function may adjust the width and/or height instead, rounding width
to (width + width_bias) & width_mask. If adjust_crop is TRUE it may
also adjust the current cropping parameters to get closer to the
desired image size. */
static int
limit_scaled_size (struct bttv_fh * fh,
__s32 * width,
__s32 * height,
enum v4l2_field field,
unsigned int width_mask,
unsigned int width_bias,
int adjust_size,
int adjust_crop)
{
struct bttv *btv = fh->btv;
const struct v4l2_rect *b;
struct bttv_crop *c;
__s32 min_width;
__s32 min_height;
__s32 max_width;
__s32 max_height;
int rc;
BUG_ON((int) width_mask >= 0 ||
width_bias >= (unsigned int) -width_mask);
/* Make sure tvnorm, vbi_end and the current cropping parameters
remain consistent until we're done. */
mutex_lock(&btv->lock);
b = &bttv_tvnorms[btv->tvnorm].cropcap.bounds;
/* Do crop - use current, don't - use default parameters. */
c = &btv->crop[!!fh->do_crop];
if (fh->do_crop
&& adjust_size
&& adjust_crop
&& !locked_btres(btv, VIDEO_RESOURCES)) {
min_width = 48;
min_height = 32;
/* We cannot scale up. When the scaled image is larger
than crop.rect we adjust the crop.rect as required
by the V4L2 spec, hence cropcap.bounds are our limit. */
max_width = min(b->width, (__s32) MAX_HACTIVE);
max_height = b->height;
/* We cannot capture the same line as video and VBI data.
Note btv->vbi_end is really a minimum, see
bttv_vbi_try_fmt(). */
if (btv->vbi_end > b->top) {
max_height -= btv->vbi_end - b->top;
rc = -EBUSY;
if (min_height > max_height)
goto fail;
}
} else {
rc = -EBUSY;
if (btv->vbi_end > c->rect.top)
goto fail;
min_width = c->min_scaled_width;
min_height = c->min_scaled_height;
max_width = c->max_scaled_width;
max_height = c->max_scaled_height;
adjust_crop = 0;
}
min_width = (min_width - width_mask - 1) & width_mask;
max_width = max_width & width_mask;
/* Max. scale factor is 16:1 for frames, 8:1 for fields. */
min_height = min_height;
/* Min. scale factor is 1:1. */
max_height >>= !V4L2_FIELD_HAS_BOTH(field);
if (adjust_size) {
*width = clamp(*width, min_width, max_width);
*height = clamp(*height, min_height, max_height);
/* Round after clamping to avoid overflow. */
*width = (*width + width_bias) & width_mask;
if (adjust_crop) {
bttv_crop_adjust(c, b, *width, *height, field);
if (btv->vbi_end > c->rect.top) {
/* Move the crop window out of the way. */
c->rect.top = btv->vbi_end;
}
}
} else {
rc = -EINVAL;
if (*width < min_width ||
*height < min_height ||
*width > max_width ||
*height > max_height ||
0 != (*width & ~width_mask))
goto fail;
}
rc = 0; /* success */
fail:
mutex_unlock(&btv->lock);
return rc;
}
/* Returns an error if the given overlay window dimensions are not
possible with the current cropping parameters. If adjust_size is
TRUE the function may adjust the window width and/or height
instead, however it always rounds the horizontal position and
width as btcx_align() does. If adjust_crop is TRUE the function
may also adjust the current cropping parameters to get closer
to the desired window size. */
static int
verify_window (struct bttv_fh * fh,
struct v4l2_window * win,
int adjust_size,
int adjust_crop)
{
enum v4l2_field field;
int maxw, maxh;
unsigned int width_mask;
int rc;
if (win->w.width < 48 || win->w.height < 32)
return -EINVAL;
......@@ -1951,32 +2422,52 @@ static int verify_window(const struct bttv_tvnorm *tvn,
return -EINVAL;
field = win->field;
maxw = tvn->swidth;
maxh = tvn->sheight;
if (V4L2_FIELD_ANY == field) {
field = (win->w.height > maxh/2)
__s32 height2;
height2 = fh->btv->crop[!!fh->do_crop].rect.height >> 1;
field = (win->w.height > height2)
? V4L2_FIELD_INTERLACED
: V4L2_FIELD_TOP;
}
switch (field) {
case V4L2_FIELD_TOP:
case V4L2_FIELD_BOTTOM:
maxh = maxh / 2;
break;
case V4L2_FIELD_INTERLACED:
break;
default:
return -EINVAL;
}
if (!fixup && (win->w.width > maxw || win->w.height > maxh))
/* 4-byte alignment. */
if (NULL == fh->ovfmt)
return -EINVAL;
width_mask = ~0;
switch (fh->ovfmt->depth) {
case 8:
case 24:
width_mask = ~3;
break;
case 16:
width_mask = ~1;
break;
case 32:
break;
default:
BUG();
}
win->w.width -= win->w.left & ~width_mask;
win->w.left = (win->w.left - width_mask - 1) & width_mask;
rc = limit_scaled_size(fh, &win->w.width, &win->w.height,
field, width_mask,
/* width_bias: round down */ 0,
adjust_size, adjust_crop);
if (0 != rc)
return rc;
if (win->w.width > maxw)
win->w.width = maxw;
if (win->w.height > maxh)
win->w.height = maxh;
win->field = field;
return 0;
}
......@@ -1991,7 +2482,9 @@ static int setup_window(struct bttv_fh *fh, struct bttv *btv,
return -EINVAL;
if (!(fh->ovfmt->flags & FORMAT_FLAGS_PACKED))
return -EINVAL;
retval = verify_window(&bttv_tvnorms[btv->tvnorm],win,fixup);
retval = verify_window(fh, win,
/* adjust_size */ fixup,
/* adjust_crop */ fixup);
if (0 != retval)
return retval;
......@@ -2048,6 +2541,7 @@ static int setup_window(struct bttv_fh *fh, struct bttv *btv,
struct bttv_buffer *new;
new = videobuf_alloc(sizeof(*new));
new->crop = btv->crop[!!fh->do_crop].rect;
bttv_overlay_risc(btv, &fh->ov, fh->ovfmt, new);
retval = bttv_switch_overlay(btv,fh,new);
}
......@@ -2080,7 +2574,7 @@ static int bttv_resource(struct bttv_fh *fh)
switch (fh->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
res = RESOURCE_VIDEO;
res = RESOURCE_VIDEO_STREAM;
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
res = RESOURCE_VBI;
......@@ -2138,7 +2632,7 @@ static int bttv_g_fmt(struct bttv_fh *fh, struct v4l2_format *f)
f->fmt.win.field = fh->ov.field;
return 0;
case V4L2_BUF_TYPE_VBI_CAPTURE:
bttv_vbi_get_fmt(fh,f);
bttv_vbi_get_fmt(fh, &f->fmt.vbi);
return 0;
default:
return -EINVAL;
......@@ -2146,35 +2640,35 @@ static int bttv_g_fmt(struct bttv_fh *fh, struct v4l2_format *f)
}
static int bttv_try_fmt(struct bttv_fh *fh, struct bttv *btv,
struct v4l2_format *f)
struct v4l2_format *f, int adjust_crop)
{
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
{
const struct bttv_format *fmt;
enum v4l2_field field;
unsigned int maxw,maxh;
__s32 width, height;
int rc;
fmt = format_by_fourcc(f->fmt.pix.pixelformat);
if (NULL == fmt)
return -EINVAL;
/* fixup format */
maxw = bttv_tvnorms[btv->tvnorm].swidth;
maxh = bttv_tvnorms[btv->tvnorm].sheight;
field = f->fmt.pix.field;
if (V4L2_FIELD_ANY == field)
field = (f->fmt.pix.height > maxh/2)
if (V4L2_FIELD_ANY == field) {
__s32 height2;
height2 = btv->crop[!!fh->do_crop].rect.height >> 1;
field = (f->fmt.pix.height > height2)
? V4L2_FIELD_INTERLACED
: V4L2_FIELD_BOTTOM;
}
if (V4L2_FIELD_SEQ_BT == field)
field = V4L2_FIELD_SEQ_TB;
switch (field) {
case V4L2_FIELD_TOP:
case V4L2_FIELD_BOTTOM:
case V4L2_FIELD_ALTERNATE:
maxh = maxh/2;
break;
case V4L2_FIELD_INTERLACED:
break;
case V4L2_FIELD_SEQ_TB:
......@@ -2185,28 +2679,29 @@ static int bttv_try_fmt(struct bttv_fh *fh, struct bttv *btv,
return -EINVAL;
}
width = f->fmt.pix.width;
height = f->fmt.pix.height;
rc = limit_scaled_size(fh, &width, &height, field,
/* width_mask: 4 pixels */ ~3,
/* width_bias: nearest */ 2,
/* adjust_size */ 1,
adjust_crop);
if (0 != rc)
return rc;
/* update data for the application */
f->fmt.pix.field = field;
if (f->fmt.pix.width < 48)
f->fmt.pix.width = 48;
if (f->fmt.pix.height < 32)
f->fmt.pix.height = 32;
if (f->fmt.pix.width > maxw)
f->fmt.pix.width = maxw;
if (f->fmt.pix.height > maxh)
f->fmt.pix.height = maxh;
pix_format_set_size (&f->fmt.pix, fmt,
f->fmt.pix.width & ~3,
f->fmt.pix.height);
pix_format_set_size(&f->fmt.pix, fmt, width, height);
return 0;
}
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
return verify_window(&bttv_tvnorms[btv->tvnorm],
&f->fmt.win, 1);
return verify_window(fh, &f->fmt.win,
/* adjust_size */ 1,
/* adjust_crop */ 0);
case V4L2_BUF_TYPE_VBI_CAPTURE:
bttv_vbi_try_fmt(fh,f);
return 0;
return bttv_vbi_try_fmt(fh, &f->fmt.vbi);
default:
return -EINVAL;
}
......@@ -2225,7 +2720,7 @@ static int bttv_s_fmt(struct bttv_fh *fh, struct bttv *btv,
retval = bttv_switch_type(fh,f->type);
if (0 != retval)
return retval;
retval = bttv_try_fmt(fh,btv,f);
retval = bttv_try_fmt(fh,btv,f, /* adjust_crop */ 1);
if (0 != retval)
return retval;
fmt = format_by_fourcc(f->fmt.pix.pixelformat);
......@@ -2254,12 +2749,7 @@ static int bttv_s_fmt(struct bttv_fh *fh, struct bttv *btv,
retval = bttv_switch_type(fh,f->type);
if (0 != retval)
return retval;
if (locked_btres(fh->btv, RESOURCE_VBI))
return -EBUSY;
bttv_vbi_try_fmt(fh,f);
bttv_vbi_setlines(fh,btv,f->fmt.vbi.count[0]);
bttv_vbi_get_fmt(fh,f);
return 0;
return bttv_vbi_set_fmt(fh, &f->fmt.vbi);
default:
return -EINVAL;
}
......@@ -2517,6 +3007,7 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
if (*on) {
fh->ov.tvnorm = btv->tvnorm;
new = videobuf_alloc(sizeof(*new));
new->crop = btv->crop[!!fh->do_crop].rect;
bttv_overlay_risc(btv, &fh->ov, fh->ovfmt, new);
} else {
new = NULL;
......@@ -2551,10 +3042,16 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
struct video_mmap *vm = arg;
struct bttv_buffer *buf;
enum v4l2_field field;
__s32 height2;
int res;
if (vm->frame >= VIDEO_MAX_FRAME)
return -EINVAL;
res = bttv_resource(fh);
if (!check_alloc_btres(btv, fh, res))
return -EBUSY;
mutex_lock(&fh->cap.lock);
retval = -EINVAL;
buf = (struct bttv_buffer *)fh->cap.bufs[vm->frame];
......@@ -2566,7 +3063,8 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
buf->vb.state == STATE_ACTIVE)
goto fh_unlock_and_return;
field = (vm->height > bttv_tvnorms[btv->tvnorm].sheight/2)
height2 = btv->crop[!!fh->do_crop].rect.height >> 1;
field = (vm->height > height2)
? V4L2_FIELD_INTERLACED
: V4L2_FIELD_BOTTOM;
retval = bttv_prepare_buffer(&fh->cap,btv,buf,
......@@ -2613,54 +3111,17 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
}
case VIDIOCGVBIFMT:
{
struct vbi_format *fmt = (void *) arg;
struct v4l2_format fmt2;
if (fh->type != V4L2_BUF_TYPE_VBI_CAPTURE) {
retval = bttv_switch_type(fh,V4L2_BUF_TYPE_VBI_CAPTURE);
if (0 != retval)
return retval;
}
bttv_vbi_get_fmt(fh, &fmt2);
memset(fmt,0,sizeof(*fmt));
fmt->sampling_rate = fmt2.fmt.vbi.sampling_rate;
fmt->samples_per_line = fmt2.fmt.vbi.samples_per_line;
fmt->sample_format = VIDEO_PALETTE_RAW;
fmt->start[0] = fmt2.fmt.vbi.start[0];
fmt->count[0] = fmt2.fmt.vbi.count[0];
fmt->start[1] = fmt2.fmt.vbi.start[1];
fmt->count[1] = fmt2.fmt.vbi.count[1];
if (fmt2.fmt.vbi.flags & V4L2_VBI_UNSYNC)
fmt->flags |= VBI_UNSYNC;
if (fmt2.fmt.vbi.flags & V4L2_VBI_INTERLACED)
fmt->flags |= VBI_INTERLACED;
return 0;
}
case VIDIOCSVBIFMT:
{
struct vbi_format *fmt = (void *) arg;
struct v4l2_format fmt2;
retval = bttv_switch_type(fh,V4L2_BUF_TYPE_VBI_CAPTURE);
if (0 != retval)
return retval;
bttv_vbi_get_fmt(fh, &fmt2);
if (fmt->sampling_rate != fmt2.fmt.vbi.sampling_rate ||
fmt->samples_per_line != fmt2.fmt.vbi.samples_per_line ||
fmt->sample_format != VIDEO_PALETTE_RAW ||
fmt->start[0] != fmt2.fmt.vbi.start[0] ||
fmt->start[1] != fmt2.fmt.vbi.start[1] ||
fmt->count[0] != fmt->count[1] ||
fmt->count[0] < 1 ||
fmt->count[0] > 32 /* VBI_MAXLINES */)
return -EINVAL;
/* fall through */
bttv_vbi_setlines(fh,btv,fmt->count[0]);
return 0;
}
case VIDIOCSVBIFMT:
return v4l_compat_translate_ioctl(inode, file, cmd,
arg, bttv_do_ioctl);
case BTTV_VERSION:
case VIDIOCGFREQ:
......@@ -2753,7 +3214,7 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
case VIDIOC_TRY_FMT:
{
struct v4l2_format *f = arg;
return bttv_try_fmt(fh,btv,f);
return bttv_try_fmt(fh,btv,f, /* adjust_crop */ 0);
}
case VIDIOC_G_FMT:
{
......@@ -2792,16 +3253,23 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
if (0 == (fmt->flags & FORMAT_FLAGS_PACKED))
return -EINVAL;
mutex_lock(&fh->cap.lock);
retval = -EINVAL;
if (fb->flags & V4L2_FBUF_FLAG_OVERLAY) {
if (fb->fmt.width > bttv_tvnorms[btv->tvnorm].swidth)
goto fh_unlock_and_return;
if (fb->fmt.height > bttv_tvnorms[btv->tvnorm].sheight)
goto fh_unlock_and_return;
__s32 width = fb->fmt.width;
__s32 height = fb->fmt.height;
retval = limit_scaled_size(fh, &width, &height,
V4L2_FIELD_INTERLACED,
/* width_mask */ ~3,
/* width_bias */ 2,
/* adjust_size */ 0,
/* adjust_crop */ 0);
if (0 != retval)
return retval;
}
/* ok, accept it */
mutex_lock(&fh->cap.lock);
btv->fbuf.base = fb->base;
btv->fbuf.fmt.width = fb->fmt.width;
btv->fbuf.fmt.height = fb->fmt.height;
......@@ -2828,6 +3296,7 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
struct bttv_buffer *new;
new = videobuf_alloc(sizeof(*new));
new->crop = btv->crop[!!fh->do_crop].rect;
bttv_overlay_risc(btv,&fh->ov,fh->ovfmt,new);
retval = bttv_switch_overlay(btv,fh,new);
}
......@@ -2843,7 +3312,13 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
return videobuf_querybuf(bttv_queue(fh),arg);
case VIDIOC_QBUF:
{
int res = bttv_resource(fh);
if (!check_alloc_btres(btv, fh, res))
return -EBUSY;
return videobuf_qbuf(bttv_queue(fh),arg);
}
case VIDIOC_DQBUF:
return videobuf_dqbuf(bttv_queue(fh),arg,
......@@ -2942,6 +3417,122 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
return v4l2_prio_change(&btv->prio, &fh->prio, *prio);
}
case VIDIOC_CROPCAP:
{
struct v4l2_cropcap *cap = arg;
enum v4l2_buf_type type;
type = cap->type;
if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
type != V4L2_BUF_TYPE_VIDEO_OVERLAY)
return -EINVAL;
*cap = bttv_tvnorms[btv->tvnorm].cropcap;
cap->type = type;
return 0;
}
case VIDIOC_G_CROP:
{
struct v4l2_crop * crop = arg;
if (crop->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
crop->type != V4L2_BUF_TYPE_VIDEO_OVERLAY)
return -EINVAL;
/* No fh->do_crop = 1; because btv->crop[1] may be
inconsistent with fh->width or fh->height and apps
do not expect a change here. */
crop->c = btv->crop[!!fh->do_crop].rect;
return 0;
}
case VIDIOC_S_CROP:
{
struct v4l2_crop *crop = arg;
const struct v4l2_rect *b;
struct bttv_crop c;
__s32 b_left;
__s32 b_top;
__s32 b_right;
__s32 b_bottom;
if (crop->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
crop->type != V4L2_BUF_TYPE_VIDEO_OVERLAY)
return -EINVAL;
retval = v4l2_prio_check(&btv->prio,&fh->prio);
if (0 != retval)
return retval;
/* Make sure tvnorm, vbi_end and the current cropping
parameters remain consistent until we're done. Note
read() may change vbi_end in check_alloc_btres(). */
mutex_lock(&btv->lock);
retval = -EBUSY;
if (locked_btres(fh->btv, VIDEO_RESOURCES))
goto btv_unlock_and_return;
b = &bttv_tvnorms[btv->tvnorm].cropcap.bounds;
b_left = b->left;
b_right = b_left + b->width;
b_bottom = b->top + b->height;
b_top = max(b->top, btv->vbi_end);
if (b_top + 32 >= b_bottom)
goto btv_unlock_and_return;
/* Min. scaled size 48 x 32. */
c.rect.left = clamp(crop->c.left, b_left, b_right - 48);
c.rect.left = min(c.rect.left, (__s32) MAX_HDELAY);
c.rect.width = clamp(crop->c.width,
48, b_right - c.rect.left);
c.rect.top = clamp(crop->c.top, b_top, b_bottom - 32);
/* Top and height must be a multiple of two. */
c.rect.top = (c.rect.top + 1) & ~1;
c.rect.height = clamp(crop->c.height,
32, b_bottom - c.rect.top);
c.rect.height = (c.rect.height + 1) & ~1;
bttv_crop_calc_limits(&c);
btv->crop[1] = c;
mutex_unlock(&btv->lock);
fh->do_crop = 1;
mutex_lock(&fh->cap.lock);
if (fh->width < c.min_scaled_width) {
fh->width = c.min_scaled_width;
btv->init.width = c.min_scaled_width;
} else if (fh->width > c.max_scaled_width) {
fh->width = c.max_scaled_width;
btv->init.width = c.max_scaled_width;
}
if (fh->height < c.min_scaled_height) {
fh->height = c.min_scaled_height;
btv->init.height = c.min_scaled_height;
} else if (fh->height > c.max_scaled_height) {
fh->height = c.max_scaled_height;
btv->init.height = c.max_scaled_height;
}
mutex_unlock(&fh->cap.lock);
return 0;
}
case VIDIOC_ENUMSTD:
case VIDIOC_G_STD:
case VIDIOC_S_STD:
......@@ -2963,6 +3554,10 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
fh_unlock_and_return:
mutex_unlock(&fh->cap.lock);
return retval;
btv_unlock_and_return:
mutex_unlock(&btv->lock);
return retval;
}
static int bttv_ioctl(struct inode *inode, struct file *file,
......@@ -2972,8 +3567,26 @@ static int bttv_ioctl(struct inode *inode, struct file *file,
switch (cmd) {
case BTTV_VBISIZE:
{
const struct bttv_tvnorm *tvnorm;
tvnorm = fh->vbi_fmt.tvnorm;
if (fh->vbi_fmt.fmt.start[0] != tvnorm->vbistart[0] ||
fh->vbi_fmt.fmt.start[1] != tvnorm->vbistart[1] ||
fh->vbi_fmt.fmt.count[0] != fh->vbi_fmt.fmt.count[1]) {
/* BTTV_VBISIZE cannot express these parameters,
however open() resets the paramters to defaults
and apps shouldn't call BTTV_VBISIZE after
VIDIOC_S_FMT. */
return -EINVAL;
}
bttv_switch_type(fh,V4L2_BUF_TYPE_VBI_CAPTURE);
return fh->lines * 2 * 2048;
return (fh->vbi_fmt.fmt.count[0] * 2
* fh->vbi_fmt.fmt.samples_per_line);
}
default:
return video_usercopy(inode, file, cmd, arg, bttv_do_ioctl);
}
......@@ -2992,10 +3605,14 @@ static ssize_t bttv_read(struct file *file, char __user *data,
switch (fh->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (locked_btres(fh->btv,RESOURCE_VIDEO))
if (!check_alloc_btres(fh->btv, fh, RESOURCE_VIDEO_READ)) {
/* VIDEO_READ in use by another fh,
or VIDEO_STREAM by any fh. */
return -EBUSY;
}
retval = videobuf_read_one(&fh->cap, data, count, ppos,
file->f_flags & O_NONBLOCK);
free_btres(fh->btv, fh, RESOURCE_VIDEO_READ);
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (!check_alloc_btres(fh->btv,fh,RESOURCE_VBI))
......@@ -3021,7 +3638,7 @@ static unsigned int bttv_poll(struct file *file, poll_table *wait)
return videobuf_poll_stream(file, &fh->vbi, wait);
}
if (check_btres(fh,RESOURCE_VIDEO)) {
if (check_btres(fh,RESOURCE_VIDEO_STREAM)) {
/* streaming capture */
if (list_empty(&fh->cap.stream))
return POLLERR;
......@@ -3031,7 +3648,7 @@ static unsigned int bttv_poll(struct file *file, poll_table *wait)
mutex_lock(&fh->cap.lock);
if (NULL == fh->cap.read_buf) {
/* need to capture a new frame */
if (locked_btres(fh->btv,RESOURCE_VIDEO)) {
if (locked_btres(fh->btv,RESOURCE_VIDEO_STREAM)) {
mutex_unlock(&fh->cap.lock);
return POLLERR;
}
......@@ -3117,8 +3734,23 @@ static int bttv_open(struct inode *inode, struct file *file)
i2c_vidiocschan(btv);
btv->users++;
if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type)
bttv_vbi_setlines(fh,btv,16);
/* The V4L2 spec requires one global set of cropping parameters
which only change on request. These are stored in btv->crop[1].
However for compatibility with V4L apps and cropping unaware
V4L2 apps we now reset the cropping parameters as seen through
this fh, which is to say VIDIOC_G_CROP and scaling limit checks
will use btv->crop[0], the default cropping parameters for the
current video standard, and VIDIOC_S_FMT will not implicitely
change the cropping parameters until VIDIOC_S_CROP has been
called. */
fh->do_crop = !reset_crop; /* module parameter */
/* Likewise there should be one global set of VBI capture
parameters, but for compatibility with V4L apps and earlier
driver versions each fh has its own parameters. */
bttv_vbi_fmt_reset(&fh->vbi_fmt, btv->tvnorm);
bttv_field_count(btv);
return 0;
}
......@@ -3133,14 +3765,17 @@ static int bttv_release(struct inode *inode, struct file *file)
bttv_switch_overlay(btv,fh,NULL);
/* stop video capture */
if (check_btres(fh, RESOURCE_VIDEO)) {
if (check_btres(fh, RESOURCE_VIDEO_STREAM)) {
videobuf_streamoff(&fh->cap);
free_btres(btv,fh,RESOURCE_VIDEO);
free_btres(btv,fh,RESOURCE_VIDEO_STREAM);
}
if (fh->cap.read_buf) {
buffer_release(&fh->cap,fh->cap.read_buf);
kfree(fh->cap.read_buf);
}
if (check_btres(fh, RESOURCE_VIDEO_READ)) {
free_btres(btv, fh, RESOURCE_VIDEO_READ);
}
/* stop vbi capture */
if (check_btres(fh, RESOURCE_VBI)) {
......@@ -3997,7 +4632,6 @@ static int __devinit bttv_probe(struct pci_dev *dev,
/* initialize structs / fill in defaults */
mutex_init(&btv->lock);
mutex_init(&btv->reslock);
spin_lock_init(&btv->s_lock);
spin_lock_init(&btv->gpio_lock);
init_waitqueue_head(&btv->gpioq);
......@@ -4095,7 +4729,6 @@ static int __devinit bttv_probe(struct pci_dev *dev,
btv->init.fmt = format_by_palette(VIDEO_PALETTE_RGB24);
btv->init.width = 320;
btv->init.height = 240;
btv->init.lines = 16;
btv->input = 0;
/* initialize hardware */
......@@ -4130,6 +4763,10 @@ static int __devinit bttv_probe(struct pci_dev *dev,
bt848_sat(btv,32768);
audio_mute(btv, 1);
set_input(btv,0);
bttv_crop_reset(&btv->crop[0], btv->tvnorm);
btv->crop[1] = btv->crop[0]; /* current = default */
disclaim_vbi_lines(btv);
disclaim_video_lines(btv);
}
/* add subdevices */
......
drivers/media/video/bt8xx/bttv-risc.c
View file @ e5bd0260
......@@ -43,7 +43,8 @@ int
bttv_risc_packed(struct bttv *btv, struct btcx_riscmem *risc,
struct scatterlist *sglist,
unsigned int offset, unsigned int bpl,
unsigned int padding, unsigned int lines)
unsigned int padding, unsigned int skip_lines,
unsigned int store_lines)
{
u32 instructions,line,todo;
struct scatterlist *sg;
......@@ -54,9 +55,11 @@ bttv_risc_packed(struct bttv *btv, struct btcx_riscmem *risc,
one write per scan line + sync + jump (all 2 dwords). padding
can cause next bpl to start close to a page border. First DMA
region may be smaller than PAGE_SIZE */
instructions = 1 + ((bpl + padding) * lines) / PAGE_SIZE + lines;
instructions += 2;
if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,instructions*8)) < 0)
instructions = skip_lines * 4;
instructions += (1 + ((bpl + padding) * store_lines)
/ PAGE_SIZE + store_lines) * 8;
instructions += 2 * 8;
if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,instructions)) < 0)
return rc;
/* sync instruction */
......@@ -64,11 +67,16 @@ bttv_risc_packed(struct bttv *btv, struct btcx_riscmem *risc,
*(rp++) = cpu_to_le32(BT848_RISC_SYNC|BT848_FIFO_STATUS_FM1);
*(rp++) = cpu_to_le32(0);
while (skip_lines-- > 0) {
*(rp++) = cpu_to_le32(BT848_RISC_SKIP | BT848_RISC_SOL |
BT848_RISC_EOL | bpl);
}
/* scan lines */
sg = sglist;
for (line = 0; line < lines; line++) {
for (line = 0; line < store_lines; line++) {
if ((btv->opt_vcr_hack) &&
(line >= (lines - VCR_HACK_LINES)))
(line >= (store_lines - VCR_HACK_LINES)))
continue;
while (offset && offset >= sg_dma_len(sg)) {
offset -= sg_dma_len(sg);
......@@ -130,7 +138,8 @@ bttv_risc_planar(struct bttv *btv, struct btcx_riscmem *risc,
/* estimate risc mem: worst case is one write per page border +
one write per scan line (5 dwords)
plus sync + jump (2 dwords) */
instructions = (ybpl * ylines * 2) / PAGE_SIZE + ylines;
instructions = ((3 + (ybpl + ypadding) * ylines * 2)
/ PAGE_SIZE) + ylines;
instructions += 2;
if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,instructions*4*5)) < 0)
return rc;
......@@ -317,10 +326,10 @@ bttv_risc_overlay(struct bttv *btv, struct btcx_riscmem *risc,
/* ---------------------------------------------------------- */
static void
bttv_calc_geo(struct bttv *btv, struct bttv_geometry *geo,
int width, int height, int interleaved, int norm)
bttv_calc_geo_old(struct bttv *btv, struct bttv_geometry *geo,
int width, int height, int interleaved,
const struct bttv_tvnorm *tvnorm)
{
const struct bttv_tvnorm *tvnorm = &bttv_tvnorms[norm];
u32 xsf, sr;
int vdelay;
......@@ -360,6 +369,62 @@ bttv_calc_geo(struct bttv *btv, struct bttv_geometry *geo,
}
}
static void
bttv_calc_geo (struct bttv * btv,
struct bttv_geometry * geo,
unsigned int width,
unsigned int height,
int both_fields,
const struct bttv_tvnorm * tvnorm,
const struct v4l2_rect * crop)
{
unsigned int c_width;
unsigned int c_height;
u32 sr;
if ((crop->left == tvnorm->cropcap.defrect.left
&& crop->top == tvnorm->cropcap.defrect.top
&& crop->width == tvnorm->cropcap.defrect.width
&& crop->height == tvnorm->cropcap.defrect.height
&& width <= tvnorm->swidth /* see PAL-Nc et al */)
|| bttv_tvcards[btv->c.type].muxsel[btv->input] < 0) {
bttv_calc_geo_old(btv, geo, width, height,
both_fields, tvnorm);
return;
}
/* For bug compatibility the image size checks permit scale
factors > 16. See bttv_crop_calc_limits(). */
c_width = min((unsigned int) crop->width, width * 16);
c_height = min((unsigned int) crop->height, height * 16);
geo->width = width;
geo->hscale = (c_width * 4096U + (width >> 1)) / width - 4096;
/* Even to store Cb first, odd for Cr. */
geo->hdelay = ((crop->left * width + c_width) / c_width) & ~1;
geo->sheight = c_height;
geo->vdelay = crop->top - tvnorm->cropcap.bounds.top + MIN_VDELAY;
sr = c_height >> !both_fields;
sr = (sr * 512U + (height >> 1)) / height - 512;
geo->vscale = (0x10000UL - sr) & 0x1fff;
geo->vscale |= both_fields ? (BT848_VSCALE_INT << 8) : 0;
geo->vtotal = tvnorm->vtotal;
geo->crop = (((geo->width >> 8) & 0x03) |
((geo->hdelay >> 6) & 0x0c) |
((geo->sheight >> 4) & 0x30) |
((geo->vdelay >> 2) & 0xc0));
if (btv->opt_combfilter) {
geo->vtc = (width < 193) ? 2 : ((width < 385) ? 1 : 0);
geo->comb = (width < 769) ? 1 : 0;
} else {
geo->vtc = 0;
geo->comb = 0;
}
}
static void
bttv_apply_geo(struct bttv *btv, struct bttv_geometry *geo, int odd)
{
......@@ -522,16 +587,51 @@ int
bttv_buffer_activate_vbi(struct bttv *btv,
struct bttv_buffer *vbi)
{
/* vbi capture */
struct btcx_riscmem *top;
struct btcx_riscmem *bottom;
int top_irq_flags;
int bottom_irq_flags;
top = NULL;
bottom = NULL;
top_irq_flags = 0;
bottom_irq_flags = 0;
if (vbi) {
unsigned int crop, vdelay;
vbi->vb.state = STATE_ACTIVE;
list_del(&vbi->vb.queue);
bttv_risc_hook(btv, RISC_SLOT_O_VBI, &vbi->top, 0);
bttv_risc_hook(btv, RISC_SLOT_E_VBI, &vbi->bottom, 4);
} else {
bttv_risc_hook(btv, RISC_SLOT_O_VBI, NULL, 0);
bttv_risc_hook(btv, RISC_SLOT_E_VBI, NULL, 0);
/* VDELAY is start of video, end of VBI capturing. */
crop = btread(BT848_E_CROP);
vdelay = btread(BT848_E_VDELAY_LO) + ((crop & 0xc0) << 2);
if (vbi->geo.vdelay > vdelay) {
vdelay = vbi->geo.vdelay & 0xfe;
crop = (crop & 0x3f) | ((vbi->geo.vdelay >> 2) & 0xc0);
btwrite(vdelay, BT848_E_VDELAY_LO);
btwrite(crop, BT848_E_CROP);
btwrite(vdelay, BT848_O_VDELAY_LO);
btwrite(crop, BT848_O_CROP);
}
if (vbi->vbi_count[0] > 0) {
top = &vbi->top;
top_irq_flags = 4;
}
if (vbi->vbi_count[1] > 0) {
top_irq_flags = 0;
bottom = &vbi->bottom;
bottom_irq_flags = 4;
}
}
bttv_risc_hook(btv, RISC_SLOT_O_VBI, top, top_irq_flags);
bttv_risc_hook(btv, RISC_SLOT_E_VBI, bottom, bottom_irq_flags);
return 0;
}
......@@ -611,28 +711,31 @@ bttv_buffer_risc(struct bttv *btv, struct bttv_buffer *buf)
int bpf = bpl * (buf->vb.height >> 1);
bttv_calc_geo(btv,&buf->geo,buf->vb.width,buf->vb.height,
V4L2_FIELD_HAS_BOTH(buf->vb.field),buf->tvnorm);
V4L2_FIELD_HAS_BOTH(buf->vb.field),
tvnorm,&buf->crop);
switch (buf->vb.field) {
case V4L2_FIELD_TOP:
bttv_risc_packed(btv,&buf->top,buf->vb.dma.sglist,
0,bpl,0,buf->vb.height);
/* offset */ 0,bpl,
/* padding */ 0,/* skip_lines */ 0,
buf->vb.height);
break;
case V4L2_FIELD_BOTTOM:
bttv_risc_packed(btv,&buf->bottom,buf->vb.dma.sglist,
0,bpl,0,buf->vb.height);
0,bpl,0,0,buf->vb.height);
break;
case V4L2_FIELD_INTERLACED:
bttv_risc_packed(btv,&buf->top,buf->vb.dma.sglist,
0,bpl,bpl,buf->vb.height >> 1);
0,bpl,bpl,0,buf->vb.height >> 1);
bttv_risc_packed(btv,&buf->bottom,buf->vb.dma.sglist,
bpl,bpl,bpl,buf->vb.height >> 1);
bpl,bpl,bpl,0,buf->vb.height >> 1);
break;
case V4L2_FIELD_SEQ_TB:
bttv_risc_packed(btv,&buf->top,buf->vb.dma.sglist,
0,bpl,0,buf->vb.height >> 1);
0,bpl,0,0,buf->vb.height >> 1);
bttv_risc_packed(btv,&buf->bottom,buf->vb.dma.sglist,
bpf,bpl,0,buf->vb.height >> 1);
bpf,bpl,0,0,buf->vb.height >> 1);
break;
default:
BUG();
......@@ -662,7 +765,8 @@ bttv_buffer_risc(struct bttv *btv, struct bttv_buffer *buf)
switch (buf->vb.field) {
case V4L2_FIELD_TOP:
bttv_calc_geo(btv,&buf->geo,buf->vb.width,
buf->vb.height,0,buf->tvnorm);
buf->vb.height,/* both_fields */ 0,
tvnorm,&buf->crop);
bttv_risc_planar(btv, &buf->top, buf->vb.dma.sglist,
0,buf->vb.width,0,buf->vb.height,
uoffset,voffset,buf->fmt->hshift,
......@@ -670,7 +774,8 @@ bttv_buffer_risc(struct bttv *btv, struct bttv_buffer *buf)
break;
case V4L2_FIELD_BOTTOM:
bttv_calc_geo(btv,&buf->geo,buf->vb.width,
buf->vb.height,0,buf->tvnorm);
buf->vb.height,0,
tvnorm,&buf->crop);
bttv_risc_planar(btv, &buf->bottom, buf->vb.dma.sglist,
0,buf->vb.width,0,buf->vb.height,
uoffset,voffset,buf->fmt->hshift,
......@@ -678,7 +783,8 @@ bttv_buffer_risc(struct bttv *btv, struct bttv_buffer *buf)
break;
case V4L2_FIELD_INTERLACED:
bttv_calc_geo(btv,&buf->geo,buf->vb.width,
buf->vb.height,1,buf->tvnorm);
buf->vb.height,1,
tvnorm,&buf->crop);
lines = buf->vb.height >> 1;
ypadding = buf->vb.width;
cpadding = buf->vb.width >> buf->fmt->hshift;
......@@ -700,7 +806,8 @@ bttv_buffer_risc(struct bttv *btv, struct bttv_buffer *buf)
break;
case V4L2_FIELD_SEQ_TB:
bttv_calc_geo(btv,&buf->geo,buf->vb.width,
buf->vb.height,1,buf->tvnorm);
buf->vb.height,1,
tvnorm,&buf->crop);
lines = buf->vb.height >> 1;
ypadding = buf->vb.width;
cpadding = buf->vb.width >> buf->fmt->hshift;
......@@ -731,11 +838,12 @@ bttv_buffer_risc(struct bttv *btv, struct bttv_buffer *buf)
/* build risc code */
buf->vb.field = V4L2_FIELD_SEQ_TB;
bttv_calc_geo(btv,&buf->geo,tvnorm->swidth,tvnorm->sheight,
1,buf->tvnorm);
1,tvnorm,&buf->crop);
bttv_risc_packed(btv, &buf->top, buf->vb.dma.sglist,
0, RAW_BPL, 0, RAW_LINES);
/* offset */ 0, RAW_BPL, /* padding */ 0,
/* skip_lines */ 0, RAW_LINES);
bttv_risc_packed(btv, &buf->bottom, buf->vb.dma.sglist,
buf->vb.size/2 , RAW_BPL, 0, RAW_LINES);
buf->vb.size/2 , RAW_BPL, 0, 0, RAW_LINES);
}
/* copy format info */
......@@ -761,7 +869,8 @@ bttv_overlay_risc(struct bttv *btv,
/* calculate geometry */
bttv_calc_geo(btv,&buf->geo,ov->w.width,ov->w.height,
V4L2_FIELD_HAS_BOTH(ov->field), ov->tvnorm);
V4L2_FIELD_HAS_BOTH(ov->field),
&bttv_tvnorms[ov->tvnorm],&buf->crop);
/* build risc code */
switch (ov->field) {
......
drivers/media/video/bt8xx/bttv-vbi.c
View file @ e5bd0260
......@@ -5,6 +5,9 @@
(c) 2002 Gerd Knorr <kraxel@bytesex.org>
Copyright (C) 2005, 2006 Michael H. Schimek <mschimek@gmx.at>
Sponsored by OPQ Systems AB
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
......@@ -41,8 +44,15 @@
to be about 244. */
#define VBI_OFFSET 244
/* 2048 for compatibility with earlier driver versions. The driver
really stores 1024 + tvnorm->vbipack * 4 samples per line in the
buffer. Note tvnorm->vbipack is <= 0xFF (limit of VBIPACK_LO + HI
is 0x1FF DWORDs) and VBI read()s store a frame counter in the last
four bytes of the VBI image. */
#define VBI_BPL 2048
/* Compatibility. */
#define VBI_DEFLINES 16
#define VBI_MAXLINES 32
static unsigned int vbibufs = 4;
static unsigned int vbi_debug = 0;
......@@ -58,21 +68,12 @@ MODULE_PARM_DESC(vbi_debug,"vbi code debug messages, default is 0 (no)");
#define dprintk(fmt, arg...) if (vbi_debug) \
printk(KERN_DEBUG "bttv%d/vbi: " fmt, btv->c.nr , ## arg)
#define IMAGE_SIZE(fmt) \
(((fmt)->count[0] + (fmt)->count[1]) * (fmt)->samples_per_line)
/* ----------------------------------------------------------------------- */
/* vbi risc code + mm */
static int
vbi_buffer_risc(struct bttv *btv, struct bttv_buffer *buf, int lines)
{
int bpl = 2048;
bttv_risc_packed(btv, &buf->top, buf->vb.dma.sglist,
0, bpl-4, 4, lines);
bttv_risc_packed(btv, &buf->bottom, buf->vb.dma.sglist,
lines * bpl, bpl-4, 4, lines);
return 0;
}
static int vbi_buffer_setup(struct videobuf_queue *q,
unsigned int *count, unsigned int *size)
{
......@@ -81,8 +82,16 @@ static int vbi_buffer_setup(struct videobuf_queue *q,
if (0 == *count)
*count = vbibufs;
*size = fh->lines * 2 * 2048;
dprintk("setup: lines=%d\n",fh->lines);
*size = IMAGE_SIZE(&fh->vbi_fmt.fmt);
dprintk("setup: samples=%u start=%d,%d count=%u,%u\n",
fh->vbi_fmt.fmt.samples_per_line,
fh->vbi_fmt.fmt.start[0],
fh->vbi_fmt.fmt.start[1],
fh->vbi_fmt.fmt.count[0],
fh->vbi_fmt.fmt.count[1]);
return 0;
}
......@@ -93,18 +102,93 @@ static int vbi_buffer_prepare(struct videobuf_queue *q,
struct bttv_fh *fh = q->priv_data;
struct bttv *btv = fh->btv;
struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
const struct bttv_tvnorm *tvnorm;
unsigned int skip_lines0, skip_lines1, min_vdelay;
int redo_dma_risc;
int rc;
buf->vb.size = fh->lines * 2 * 2048;
buf->vb.size = IMAGE_SIZE(&fh->vbi_fmt.fmt);
if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
return -EINVAL;
tvnorm = fh->vbi_fmt.tvnorm;
/* There's no VBI_VDELAY register, RISC must skip the lines
we don't want. With default parameters we skip zero lines
as earlier driver versions did. The driver permits video
standard changes while capturing, so we use vbi_fmt.tvnorm
instead of btv->tvnorm to skip zero lines after video
standard changes as well. */
skip_lines0 = 0;
skip_lines1 = 0;
if (fh->vbi_fmt.fmt.count[0] > 0)
skip_lines0 = max(0, (fh->vbi_fmt.fmt.start[0]
- tvnorm->vbistart[0]));
if (fh->vbi_fmt.fmt.count[1] > 0)
skip_lines1 = max(0, (fh->vbi_fmt.fmt.start[1]
- tvnorm->vbistart[1]));
redo_dma_risc = 0;
if (buf->vbi_skip[0] != skip_lines0 ||
buf->vbi_skip[1] != skip_lines1 ||
buf->vbi_count[0] != fh->vbi_fmt.fmt.count[0] ||
buf->vbi_count[1] != fh->vbi_fmt.fmt.count[1]) {
buf->vbi_skip[0] = skip_lines0;
buf->vbi_skip[1] = skip_lines1;
buf->vbi_count[0] = fh->vbi_fmt.fmt.count[0];
buf->vbi_count[1] = fh->vbi_fmt.fmt.count[1];
redo_dma_risc = 1;
}
if (STATE_NEEDS_INIT == buf->vb.state) {
redo_dma_risc = 1;
if (0 != (rc = videobuf_iolock(q, &buf->vb, NULL)))
goto fail;
if (0 != (rc = vbi_buffer_risc(btv,buf,fh->lines)))
}
if (redo_dma_risc) {
unsigned int bpl, padding, offset;
bpl = 2044; /* max. vbipack */
padding = VBI_BPL - bpl;
if (fh->vbi_fmt.fmt.count[0] > 0) {
rc = bttv_risc_packed(btv, &buf->top,
buf->vb.dma.sglist,
/* offset */ 0, bpl,
padding, skip_lines0,
fh->vbi_fmt.fmt.count[0]);
if (0 != rc)
goto fail;
}
if (fh->vbi_fmt.fmt.count[1] > 0) {
offset = fh->vbi_fmt.fmt.count[0] * VBI_BPL;
rc = bttv_risc_packed(btv, &buf->bottom,
buf->vb.dma.sglist,
offset, bpl,
padding, skip_lines1,
fh->vbi_fmt.fmt.count[1]);
if (0 != rc)
goto fail;
}
}
/* VBI capturing ends at VDELAY, start of video capturing,
no matter where the RISC program ends. VDELAY minimum is 2,
bounds.top is the corresponding first field line number
times two. VDELAY counts half field lines. */
min_vdelay = MIN_VDELAY;
if (fh->vbi_fmt.end >= tvnorm->cropcap.bounds.top)
min_vdelay += fh->vbi_fmt.end - tvnorm->cropcap.bounds.top;
/* For bttv_buffer_activate_vbi(). */
buf->geo.vdelay = min_vdelay;
buf->vb.state = STATE_PREPARED;
buf->vb.field = field;
dprintk("buf prepare %p: top=%p bottom=%p field=%s\n",
......@@ -152,69 +236,215 @@ struct videobuf_queue_ops bttv_vbi_qops = {
/* ----------------------------------------------------------------------- */
void bttv_vbi_setlines(struct bttv_fh *fh, struct bttv *btv, int lines)
static int
try_fmt (struct v4l2_vbi_format * f,
const struct bttv_tvnorm * tvnorm,
__s32 crop_start)
{
int vdelay;
if (lines < 1)
lines = 1;
if (lines > VBI_MAXLINES)
lines = VBI_MAXLINES;
fh->lines = lines;
vdelay = btread(BT848_E_VDELAY_LO);
if (vdelay < lines*2) {
vdelay = lines*2;
btwrite(vdelay,BT848_E_VDELAY_LO);
btwrite(vdelay,BT848_O_VDELAY_LO);
__s32 min_start, max_start, max_end, f2_offset;
unsigned int i;
/* For compatibility with earlier driver versions we must pretend
the VBI and video capture window may overlap. In reality RISC
magic aborts VBI capturing at the first line of video capturing,
leaving the rest of the buffer unchanged, usually all zero.
VBI capturing must always start before video capturing. >> 1
because cropping counts field lines times two. */
min_start = tvnorm->vbistart[0];
max_start = (crop_start >> 1) - 1;
max_end = (tvnorm->cropcap.bounds.top
+ tvnorm->cropcap.bounds.height) >> 1;
if (min_start > max_start)
return -EBUSY;
BUG_ON(max_start >= max_end);
f->sampling_rate = tvnorm->Fsc;
f->samples_per_line = VBI_BPL;
f->sample_format = V4L2_PIX_FMT_GREY;
f->offset = VBI_OFFSET;
f2_offset = tvnorm->vbistart[1] - tvnorm->vbistart[0];
for (i = 0; i < 2; ++i) {
if (0 == f->count[i]) {
/* No data from this field. We leave f->start[i]
alone because VIDIOCSVBIFMT is w/o and EINVALs
when a driver does not support exactly the
requested parameters. */
} else {
s64 start, count;
start = clamp(f->start[i], min_start, max_start);
/* s64 to prevent overflow. */
count = (s64) f->start[i] + f->count[i] - start;
f->start[i] = start;
f->count[i] = clamp(count, (s64) 1,
max_end - start);
}
min_start += f2_offset;
max_start += f2_offset;
max_end += f2_offset;
}
if (0 == (f->count[0] | f->count[1])) {
/* As in earlier driver versions. */
f->start[0] = tvnorm->vbistart[0];
f->start[1] = tvnorm->vbistart[1];
f->count[0] = 1;
f->count[1] = 1;
}
f->flags = 0;
f->reserved[0] = 0;
f->reserved[1] = 0;
return 0;
}
void bttv_vbi_try_fmt(struct bttv_fh *fh, struct v4l2_format *f)
int
bttv_vbi_try_fmt (struct bttv_fh * fh,
struct v4l2_vbi_format * f)
{
struct bttv *btv = fh->btv;
const struct bttv_tvnorm *tvnorm;
s64 count0,count1,count;
__s32 crop_start;
tvnorm = &bttv_tvnorms[fh->btv->tvnorm];
f->type = V4L2_BUF_TYPE_VBI_CAPTURE;
f->fmt.vbi.sampling_rate = tvnorm->Fsc;
f->fmt.vbi.samples_per_line = 2048;
f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
f->fmt.vbi.offset = VBI_OFFSET;
f->fmt.vbi.flags = 0;
mutex_lock(&btv->lock);
/* s64 to prevent overflow. */
count0 = (s64) f->fmt.vbi.start[0] + f->fmt.vbi.count[0]
- tvnorm->vbistart[0];
count1 = (s64) f->fmt.vbi.start[1] + f->fmt.vbi.count[1]
- tvnorm->vbistart[1];
count = clamp (max (count0, count1), (s64) 1, (s64) VBI_MAXLINES);
tvnorm = &bttv_tvnorms[btv->tvnorm];
crop_start = btv->crop_start;
f->fmt.vbi.start[0] = tvnorm->vbistart[0];
f->fmt.vbi.start[1] = tvnorm->vbistart[1];
f->fmt.vbi.count[0] = count;
f->fmt.vbi.count[1] = count;
mutex_unlock(&btv->lock);
f->fmt.vbi.reserved[0] = 0;
f->fmt.vbi.reserved[1] = 0;
return try_fmt(f, tvnorm, crop_start);
}
void bttv_vbi_get_fmt(struct bttv_fh *fh, struct v4l2_format *f)
int
bttv_vbi_set_fmt (struct bttv_fh * fh,
struct v4l2_vbi_format * f)
{
struct bttv *btv = fh->btv;
const struct bttv_tvnorm *tvnorm;
__s32 start1, end;
int rc;
mutex_lock(&btv->lock);
rc = -EBUSY;
if (fh->resources & RESOURCE_VBI)
goto fail;
tvnorm = &bttv_tvnorms[btv->tvnorm];
rc = try_fmt(f, tvnorm, btv->crop_start);
if (0 != rc)
goto fail;
start1 = f->start[1] - tvnorm->vbistart[1] + tvnorm->vbistart[0];
/* First possible line of video capturing. Should be
max(f->start[0] + f->count[0], start1 + f->count[1]) * 2
when capturing both fields. But for compatibility we must
pretend the VBI and video capture window may overlap,
so end = start + 1, the lowest possible value, times two
because vbi_fmt.end counts field lines times two. */
end = max(f->start[0], start1) * 2 + 2;
mutex_lock(&fh->vbi.lock);
fh->vbi_fmt.fmt = *f;
fh->vbi_fmt.tvnorm = tvnorm;
fh->vbi_fmt.end = end;
mutex_unlock(&fh->vbi.lock);
rc = 0;
fail:
mutex_unlock(&btv->lock);
return rc;
}
void
bttv_vbi_get_fmt (struct bttv_fh * fh,
struct v4l2_vbi_format * f)
{
const struct bttv_tvnorm *tvnorm;
*f = fh->vbi_fmt.fmt;
tvnorm = &bttv_tvnorms[fh->btv->tvnorm];
memset(f,0,sizeof(*f));
f->type = V4L2_BUF_TYPE_VBI_CAPTURE;
f->fmt.vbi.sampling_rate = tvnorm->Fsc;
f->fmt.vbi.samples_per_line = 2048;
f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
f->fmt.vbi.offset = VBI_OFFSET;
f->fmt.vbi.start[0] = tvnorm->vbistart[0];
f->fmt.vbi.start[1] = tvnorm->vbistart[1];
f->fmt.vbi.count[0] = fh->lines;
f->fmt.vbi.count[1] = fh->lines;
f->fmt.vbi.flags = 0;
if (tvnorm != fh->vbi_fmt.tvnorm) {
__s32 max_end;
unsigned int i;
/* As in vbi_buffer_prepare() this imitates the
behaviour of earlier driver versions after video
standard changes, with default parameters anyway. */
max_end = (tvnorm->cropcap.bounds.top
+ tvnorm->cropcap.bounds.height) >> 1;
f->sampling_rate = tvnorm->Fsc;
for (i = 0; i < 2; ++i) {
__s32 new_start;
new_start = f->start[i]
+ tvnorm->vbistart[i]
- fh->vbi_fmt.tvnorm->vbistart[i];
f->start[i] = min(new_start, max_end - 1);
f->count[i] = min((__s32) f->count[i],
max_end - f->start[i]);
max_end += tvnorm->vbistart[1]
- tvnorm->vbistart[0];
}
}
}
void
bttv_vbi_fmt_reset (struct bttv_vbi_fmt * f,
int norm)
{
const struct bttv_tvnorm *tvnorm;
unsigned int real_samples_per_line;
unsigned int real_count;
tvnorm = &bttv_tvnorms[norm];
f->fmt.sampling_rate = tvnorm->Fsc;
f->fmt.samples_per_line = VBI_BPL;
f->fmt.sample_format = V4L2_PIX_FMT_GREY;
f->fmt.offset = VBI_OFFSET;
f->fmt.start[0] = tvnorm->vbistart[0];
f->fmt.start[1] = tvnorm->vbistart[1];
f->fmt.count[0] = VBI_DEFLINES;
f->fmt.count[1] = VBI_DEFLINES;
f->fmt.flags = 0;
f->fmt.reserved[0] = 0;
f->fmt.reserved[1] = 0;
/* For compatibility the buffer size must be 2 * VBI_DEFLINES *
VBI_BPL regardless of the current video standard. */
real_samples_per_line = 1024 + tvnorm->vbipack * 4;
real_count = ((tvnorm->cropcap.defrect.top >> 1)
- tvnorm->vbistart[0]);
BUG_ON(real_samples_per_line > VBI_BPL);
BUG_ON(real_count > VBI_DEFLINES);
f->tvnorm = tvnorm;
/* See bttv_vbi_fmt_set(). */
f->end = tvnorm->vbistart[0] * 2 + 2;
}
/* ----------------------------------------------------------------------- */
......
drivers/media/video/bt8xx/bttvp.h
View file @ e5bd0260
......@@ -26,7 +26,7 @@
#define _BTTVP_H_
#include <linux/version.h>
#define BTTV_VERSION_CODE KERNEL_VERSION(0,9,16)
#define BTTV_VERSION_CODE KERNEL_VERSION(0,9,17)
#include <linux/types.h>
#include <linux/wait.h>
......@@ -66,14 +66,22 @@
#define RISC_SLOT_LOOP 14
#define RESOURCE_OVERLAY 1
#define RESOURCE_VIDEO 2
#define RESOURCE_VIDEO_STREAM 2
#define RESOURCE_VBI 4
#define RESOURCE_VIDEO_READ 8
#define RAW_LINES 640
#define RAW_BPL 1024
#define UNSET (-1U)
/* Min. value in VDELAY register. */
#define MIN_VDELAY 2
/* Even to get Cb first, odd for Cr. */
#define MAX_HDELAY (0x3FF & -2)
/* Limits scaled width, which must be a multiple of 4. */
#define MAX_HACTIVE (0x3FF & -4)
#define clamp(x, low, high) min (max (low, x), high)
/* ---------------------------------------------------------- */
......@@ -92,8 +100,13 @@ struct bttv_tvnorm {
u16 vtotal;
int sram;
/* ITU-R frame line number of the first VBI line we can
capture, of the first and second field. */
capture, of the first and second field. The last possible line
is determined by cropcap.bounds. */
u16 vbistart[2];
/* Horizontally this counts fCLKx1 samples following the leading
edge of the horizontal sync pulse, vertically ITU-R frame line
numbers of the first field times two (2, 4, 6, ... 524 or 624). */
struct v4l2_cropcap cropcap;
};
extern const struct bttv_tvnorm bttv_tvnorms[];
......@@ -128,6 +141,9 @@ struct bttv_buffer {
struct bttv_geometry geo;
struct btcx_riscmem top;
struct btcx_riscmem bottom;
struct v4l2_rect crop;
unsigned int vbi_skip[2];
unsigned int vbi_count[2];
};
struct bttv_buffer_set {
......@@ -146,6 +162,34 @@ struct bttv_overlay {
int setup_ok;
};
struct bttv_vbi_fmt {
struct v4l2_vbi_format fmt;
/* fmt.start[] and count[] refer to this video standard. */
const struct bttv_tvnorm *tvnorm;
/* Earliest possible start of video capturing with this
v4l2_vbi_format, in struct bttv_crop.rect units. */
__s32 end;
};
/* bttv-vbi.c */
void bttv_vbi_fmt_reset(struct bttv_vbi_fmt *f, int norm);
struct bttv_crop {
/* A cropping rectangle in struct bttv_tvnorm.cropcap units. */
struct v4l2_rect rect;
/* Scaled image size limits with this crop rect. Divide
max_height, but not min_height, by two when capturing
single fields. See also bttv_crop_reset() and
bttv_crop_adjust() in bttv-driver.c. */
__s32 min_scaled_width;
__s32 min_scaled_height;
__s32 max_scaled_width;
__s32 max_scaled_height;
};
struct bttv_fh {
struct bttv *btv;
int resources;
......@@ -160,13 +204,19 @@ struct bttv_fh {
int width;
int height;
/* current settings */
/* video overlay */
const struct bttv_format *ovfmt;
struct bttv_overlay ov;
/* video overlay */
/* Application called VIDIOC_S_CROP. */
int do_crop;
/* vbi capture */
struct videobuf_queue vbi;
int lines;
/* Current VBI capture window as seen through this fh (cannot
be global for compatibility with earlier drivers). Protected
by struct bttv.lock and struct bttv_fh.vbi.lock. */
struct bttv_vbi_fmt vbi_fmt;
};
/* ---------------------------------------------------------- */
......@@ -176,7 +226,8 @@ struct bttv_fh {
int bttv_risc_packed(struct bttv *btv, struct btcx_riscmem *risc,
struct scatterlist *sglist,
unsigned int offset, unsigned int bpl,
unsigned int pitch, unsigned int lines);
unsigned int pitch, unsigned int skip_lines,
unsigned int store_lines);
/* control dma register + risc main loop */
void bttv_set_dma(struct bttv *btv, int override);
......@@ -202,9 +253,9 @@ int bttv_overlay_risc(struct bttv *btv, struct bttv_overlay *ov,
/* ---------------------------------------------------------- */
/* bttv-vbi.c */
void bttv_vbi_try_fmt(struct bttv_fh *fh, struct v4l2_format *f);
void bttv_vbi_get_fmt(struct bttv_fh *fh, struct v4l2_format *f);
void bttv_vbi_setlines(struct bttv_fh *fh, struct bttv *btv, int lines);
int bttv_vbi_try_fmt(struct bttv_fh *fh, struct v4l2_vbi_format *f);
void bttv_vbi_get_fmt(struct bttv_fh *fh, struct v4l2_vbi_format *f);
int bttv_vbi_set_fmt(struct bttv_fh *fh, struct v4l2_vbi_format *f);
extern struct videobuf_queue_ops bttv_vbi_qops;
......@@ -233,7 +284,6 @@ extern int fini_bttv_i2c(struct bttv *btv);
#define d2printk if (bttv_debug >= 2) printk
#define BTTV_MAX_FBUF 0x208000
#define VBIBUF_SIZE (2048*VBI_MAXLINES*2)
#define BTTV_TIMEOUT (HZ/2) /* 0.5 seconds */
#define BTTV_FREE_IDLE (HZ) /* one second */
......@@ -314,7 +364,6 @@ struct bttv {
spinlock_t s_lock;
struct mutex lock;
int resources;
struct mutex reslock;
#ifdef VIDIOC_G_PRIORITY
struct v4l2_prio_state prio;
#endif
......@@ -384,6 +433,21 @@ struct bttv {
unsigned int users;
struct bttv_fh init;
/* Default (0) and current (1) video capturing and overlay
cropping parameters in bttv_tvnorm.cropcap units. Protected
by bttv.lock. */
struct bttv_crop crop[2];
/* Earliest possible start of video capturing in
bttv_tvnorm.cropcap line units. Set by check_alloc_btres()
and free_btres(). Protected by bttv.lock. */
__s32 vbi_end;
/* Latest possible end of VBI capturing (= crop[x].rect.top when
VIDEO_RESOURCES are locked). Set by check_alloc_btres()
and free_btres(). Protected by bttv.lock. */
__s32 crop_start;
};
/* our devices */
......
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