From: Ondrej Zary <linux@rainbow-software.org>
To: "Hans Verkuil" <hverkuil@xs4all.nl>
Cc: "Hans de Goede" <hdegoede@redhat.com>,
"Joerg Heckenbach" <joerg@heckenbach-aw.de>,
"Dwaine Garden" <dwainegarden@rogers.com>,
linux-media@vger.kernel.org,
"Kernel development list" <linux-kernel@vger.kernel.org>
Subject: [PATCH 4/4] usbvision: remove RGB format conversion
Date: Wed, 27 Apr 2011 22:41:32 +0200 [thread overview]
Message-ID: <201104272241.38457.linux@rainbow-software.org> (raw)
As V4L2 spec says that drivers shouldn't do any in-kernel image format
conversion, remove it.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
---
Feel free to drop this patch if the functionality is needed.
diff -up linux-2.6.39-rc2-/drivers/media/video/usbvision/usbvision-core.c linux-2.6.39-rc2/drivers/media/video/usbvision/usbvision-core.c
--- linux-2.6.39-rc2-/drivers/media/video/usbvision/usbvision-core.c 2011-04-27 22:18:52.000000000 +0200
+++ linux-2.6.39-rc2/drivers/media/video/usbvision/usbvision-core.c 2011-04-27 22:18:27.000000000 +0200
@@ -494,9 +494,8 @@ static enum parse_state usbvision_parse_
int len;
int i;
unsigned char yuyv[4] = { 180, 128, 10, 128 }; /* YUV components */
- unsigned char rv, gv, bv; /* RGB components */
- int clipmask_index, bytes_per_pixel;
- int stretch_bytes, clipmask_add;
+ int bytes_per_pixel;
+ int stretch_bytes;
frame = usbvision->cur_frame;
f = frame->data + (frame->v4l2_linesize * frame->curline);
@@ -513,78 +512,16 @@ static enum parse_state usbvision_parse_
bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
- clipmask_index = frame->curline * MAX_FRAME_WIDTH;
- clipmask_add = usbvision->stretch_width;
for (i = 0; i < frame->frmwidth; i += (2 * usbvision->stretch_width)) {
scratch_get(usbvision, &yuyv[0], 4);
- if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
- *f++ = yuyv[0]; /* Y */
- *f++ = yuyv[3]; /* U */
- } else {
- YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
- switch (frame->v4l2_format.format) {
- case V4L2_PIX_FMT_RGB565:
- *f++ = (0x1F & rv) |
- (0xE0 & (gv << 5));
- *f++ = (0x07 & (gv >> 3)) |
- (0xF8 & bv);
- break;
- case V4L2_PIX_FMT_RGB24:
- *f++ = rv;
- *f++ = gv;
- *f++ = bv;
- break;
- case V4L2_PIX_FMT_RGB32:
- *f++ = rv;
- *f++ = gv;
- *f++ = bv;
- f++;
- break;
- case V4L2_PIX_FMT_RGB555:
- *f++ = (0x1F & rv) |
- (0xE0 & (gv << 5));
- *f++ = (0x03 & (gv >> 3)) |
- (0x7C & (bv << 2));
- break;
- }
- }
- clipmask_index += clipmask_add;
+ *f++ = yuyv[0]; /* Y */
+ *f++ = yuyv[3]; /* U */
f += stretch_bytes;
- if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
- *f++ = yuyv[2]; /* Y */
- *f++ = yuyv[1]; /* V */
- } else {
- YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
- switch (frame->v4l2_format.format) {
- case V4L2_PIX_FMT_RGB565:
- *f++ = (0x1F & rv) |
- (0xE0 & (gv << 5));
- *f++ = (0x07 & (gv >> 3)) |
- (0xF8 & bv);
- break;
- case V4L2_PIX_FMT_RGB24:
- *f++ = rv;
- *f++ = gv;
- *f++ = bv;
- break;
- case V4L2_PIX_FMT_RGB32:
- *f++ = rv;
- *f++ = gv;
- *f++ = bv;
- f++;
- break;
- case V4L2_PIX_FMT_RGB555:
- *f++ = (0x1F & rv) |
- (0xE0 & (gv << 5));
- *f++ = (0x03 & (gv >> 3)) |
- (0x7C & (bv << 2));
- break;
- }
- }
- clipmask_index += clipmask_add;
+ *f++ = yuyv[2]; /* Y */
+ *f++ = yuyv[1]; /* V */
f += stretch_bytes;
}
@@ -702,22 +639,20 @@ static enum parse_state usbvision_parse_
unsigned char strip_data[USBVISION_STRIP_LEN_MAX];
unsigned char strip_header[USBVISION_STRIP_HEADER_LEN];
int idx, idx_end, strip_len, strip_ptr, startblock_pos, block_pos, block_type_pos;
- int clipmask_index, bytes_per_pixel, rc;
+ int bytes_per_pixel, rc;
int image_size;
- unsigned char rv, gv, bv;
static unsigned char *Y, *U, *V;
frame = usbvision->cur_frame;
image_size = frame->frmwidth * frame->frmheight;
f = frame->data + (frame->v4l2_linesize * frame->curline);
- if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { /* initialise u and v pointers */
- /* get base of u and b planes add halfoffset */
- u = frame->data
- + image_size
- + (frame->frmwidth >> 1) * frame->curline;
- v = u + (image_size >> 1);
- }
+ /* initialise u and v pointers */
+ /* get base of u and b planes add halfoffset */
+ u = frame->data
+ + image_size
+ + (frame->frmwidth >> 1) * frame->curline;
+ v = u + (image_size >> 1);
if (frame->curline == 0)
usbvision_adjust_compression(usbvision);
@@ -762,7 +697,6 @@ static enum parse_state usbvision_parse_
}
bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
- clipmask_index = frame->curline * MAX_FRAME_WIDTH;
scratch_get(usbvision, strip_data, strip_len);
@@ -788,41 +722,8 @@ static enum parse_state usbvision_parse_
usbvision->strip_len_errors++;
for (idx = 0; idx < idx_end; idx++) {
- if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
- *f++ = Y[idx];
- *f++ = idx & 0x01 ? U[idx / 2] : V[idx / 2];
- } else {
- YUV_TO_RGB_BY_THE_BOOK(Y[idx], U[idx / 2], V[idx / 2], rv, gv, bv);
- switch (frame->v4l2_format.format) {
- case V4L2_PIX_FMT_GREY:
- *f++ = Y[idx];
- break;
- case V4L2_PIX_FMT_RGB555:
- *f++ = (0x1F & rv) |
- (0xE0 & (gv << 5));
- *f++ = (0x03 & (gv >> 3)) |
- (0x7C & (bv << 2));
- break;
- case V4L2_PIX_FMT_RGB565:
- *f++ = (0x1F & rv) |
- (0xE0 & (gv << 5));
- *f++ = (0x07 & (gv >> 3)) |
- (0xF8 & bv);
- break;
- case V4L2_PIX_FMT_RGB24:
- *f++ = rv;
- *f++ = gv;
- *f++ = bv;
- break;
- case V4L2_PIX_FMT_RGB32:
- *f++ = rv;
- *f++ = gv;
- *f++ = bv;
- f++;
- break;
- }
- }
- clipmask_index++;
+ *f++ = Y[idx];
+ *f++ = idx & 0x01 ? U[idx / 2] : V[idx / 2];
}
*pcopylen += frame->v4l2_linesize;
@@ -857,11 +758,8 @@ static enum parse_state usbvision_parse_
const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
const int uv_step[] = { 0, 0, 0, 4 }, uv_step_size = 4;
unsigned char y[2], u, v; /* YUV components */
- int y_, u_, v_, vb, uvg, ur;
- int r_, g_, b_; /* RGB components */
- unsigned char g;
- int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
- int clipmask_add, stretch_bytes;
+ int bytes_per_pixel;
+ int stretch_bytes;
frame = usbvision->cur_frame;
f_even = frame->data + (frame->v4l2_linesize * frame->curline);
@@ -872,9 +770,6 @@ static enum parse_state usbvision_parse_
/* I need two lines to decode the color */
bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
- clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
- clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
- clipmask_add = usbvision->stretch_width;
pixel_per_line = frame->isoc_header.frame_width;
if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
@@ -901,185 +796,22 @@ static enum parse_state usbvision_parse_
scratch_get_extra(usbvision, &u, &u_ptr, 1);
scratch_get_extra(usbvision, &v, &v_ptr, 1);
- /* I don't use the YUV_TO_RGB macro for better performance */
- v_ = v - 128;
- u_ = u - 128;
- vb = 132252 * v_;
- uvg = -53281 * u_ - 25625 * v_;
- ur = 104595 * u_;
-
- if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
- *f_even++ = y[0];
- *f_even++ = v;
- } else {
- y_ = 76284 * (y[0] - 16);
-
- b_ = (y_ + vb) >> 16;
- g_ = (y_ + uvg) >> 16;
- r_ = (y_ + ur) >> 16;
-
- switch (frame->v4l2_format.format) {
- case V4L2_PIX_FMT_RGB565:
- g = LIMIT_RGB(g_);
- *f_even++ =
- (0x1F & LIMIT_RGB(r_)) |
- (0xE0 & (g << 5));
- *f_even++ =
- (0x07 & (g >> 3)) |
- (0xF8 & LIMIT_RGB(b_));
- break;
- case V4L2_PIX_FMT_RGB24:
- *f_even++ = LIMIT_RGB(r_);
- *f_even++ = LIMIT_RGB(g_);
- *f_even++ = LIMIT_RGB(b_);
- break;
- case V4L2_PIX_FMT_RGB32:
- *f_even++ = LIMIT_RGB(r_);
- *f_even++ = LIMIT_RGB(g_);
- *f_even++ = LIMIT_RGB(b_);
- f_even++;
- break;
- case V4L2_PIX_FMT_RGB555:
- g = LIMIT_RGB(g_);
- *f_even++ = (0x1F & LIMIT_RGB(r_)) |
- (0xE0 & (g << 5));
- *f_even++ = (0x03 & (g >> 3)) |
- (0x7C & (LIMIT_RGB(b_) << 2));
- break;
- }
- }
- clipmask_even_index += clipmask_add;
+ *f_even++ = y[0];
+ *f_even++ = v;
f_even += stretch_bytes;
- if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
- *f_even++ = y[1];
- *f_even++ = u;
- } else {
- y_ = 76284 * (y[1] - 16);
-
- b_ = (y_ + vb) >> 16;
- g_ = (y_ + uvg) >> 16;
- r_ = (y_ + ur) >> 16;
-
- switch (frame->v4l2_format.format) {
- case V4L2_PIX_FMT_RGB565:
- g = LIMIT_RGB(g_);
- *f_even++ =
- (0x1F & LIMIT_RGB(r_)) |
- (0xE0 & (g << 5));
- *f_even++ =
- (0x07 & (g >> 3)) |
- (0xF8 & LIMIT_RGB(b_));
- break;
- case V4L2_PIX_FMT_RGB24:
- *f_even++ = LIMIT_RGB(r_);
- *f_even++ = LIMIT_RGB(g_);
- *f_even++ = LIMIT_RGB(b_);
- break;
- case V4L2_PIX_FMT_RGB32:
- *f_even++ = LIMIT_RGB(r_);
- *f_even++ = LIMIT_RGB(g_);
- *f_even++ = LIMIT_RGB(b_);
- f_even++;
- break;
- case V4L2_PIX_FMT_RGB555:
- g = LIMIT_RGB(g_);
- *f_even++ = (0x1F & LIMIT_RGB(r_)) |
- (0xE0 & (g << 5));
- *f_even++ = (0x03 & (g >> 3)) |
- (0x7C & (LIMIT_RGB(b_) << 2));
- break;
- }
- }
- clipmask_even_index += clipmask_add;
+ *f_even++ = y[1];
+ *f_even++ = u;
f_even += stretch_bytes;
scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
- if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
- *f_odd++ = y[0];
- *f_odd++ = v;
- } else {
- y_ = 76284 * (y[0] - 16);
-
- b_ = (y_ + vb) >> 16;
- g_ = (y_ + uvg) >> 16;
- r_ = (y_ + ur) >> 16;
-
- switch (frame->v4l2_format.format) {
- case V4L2_PIX_FMT_RGB565:
- g = LIMIT_RGB(g_);
- *f_odd++ =
- (0x1F & LIMIT_RGB(r_)) |
- (0xE0 & (g << 5));
- *f_odd++ =
- (0x07 & (g >> 3)) |
- (0xF8 & LIMIT_RGB(b_));
- break;
- case V4L2_PIX_FMT_RGB24:
- *f_odd++ = LIMIT_RGB(r_);
- *f_odd++ = LIMIT_RGB(g_);
- *f_odd++ = LIMIT_RGB(b_);
- break;
- case V4L2_PIX_FMT_RGB32:
- *f_odd++ = LIMIT_RGB(r_);
- *f_odd++ = LIMIT_RGB(g_);
- *f_odd++ = LIMIT_RGB(b_);
- f_odd++;
- break;
- case V4L2_PIX_FMT_RGB555:
- g = LIMIT_RGB(g_);
- *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
- (0xE0 & (g << 5));
- *f_odd++ = (0x03 & (g >> 3)) |
- (0x7C & (LIMIT_RGB(b_) << 2));
- break;
- }
- }
- clipmask_odd_index += clipmask_add;
+ *f_odd++ = y[0];
+ *f_odd++ = v;
f_odd += stretch_bytes;
- if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
- *f_odd++ = y[1];
- *f_odd++ = u;
- } else {
- y_ = 76284 * (y[1] - 16);
-
- b_ = (y_ + vb) >> 16;
- g_ = (y_ + uvg) >> 16;
- r_ = (y_ + ur) >> 16;
-
- switch (frame->v4l2_format.format) {
- case V4L2_PIX_FMT_RGB565:
- g = LIMIT_RGB(g_);
- *f_odd++ =
- (0x1F & LIMIT_RGB(r_)) |
- (0xE0 & (g << 5));
- *f_odd++ =
- (0x07 & (g >> 3)) |
- (0xF8 & LIMIT_RGB(b_));
- break;
- case V4L2_PIX_FMT_RGB24:
- *f_odd++ = LIMIT_RGB(r_);
- *f_odd++ = LIMIT_RGB(g_);
- *f_odd++ = LIMIT_RGB(b_);
- break;
- case V4L2_PIX_FMT_RGB32:
- *f_odd++ = LIMIT_RGB(r_);
- *f_odd++ = LIMIT_RGB(g_);
- *f_odd++ = LIMIT_RGB(b_);
- f_odd++;
- break;
- case V4L2_PIX_FMT_RGB555:
- g = LIMIT_RGB(g_);
- *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
- (0xE0 & (g << 5));
- *f_odd++ = (0x03 & (g >> 3)) |
- (0x7C & (LIMIT_RGB(b_) << 2));
- break;
- }
- }
- clipmask_odd_index += clipmask_add;
+ *f_odd++ = y[1];
+ *f_odd++ = u;
f_odd += stretch_bytes;
}
diff -up linux-2.6.39-rc2-/drivers/media/video/usbvision/usbvision.h linux-2.6.39-rc2/drivers/media/video/usbvision/usbvision.h
--- linux-2.6.39-rc2-/drivers/media/video/usbvision/usbvision.h 2011-04-27 22:05:39.000000000 +0200
+++ linux-2.6.39-rc2/drivers/media/video/usbvision/usbvision.h 2011-04-27 22:18:27.000000000 +0200
@@ -170,48 +170,6 @@ enum {
{ if ((v) < (mi)) (v) = (mi); else if ((v) > (ma)) (v) = (ma); }
/*
- * We use macros to do YUV -> RGB conversion because this is
- * very important for speed and totally unimportant for size.
- *
- * YUV -> RGB Conversion
- * ---------------------
- *
- * B = 1.164*(Y-16) + 2.018*(V-128)
- * G = 1.164*(Y-16) - 0.813*(U-128) - 0.391*(V-128)
- * R = 1.164*(Y-16) + 1.596*(U-128)
- *
- * If you fancy integer arithmetics (as you should), hear this:
- *
- * 65536*B = 76284*(Y-16) + 132252*(V-128)
- * 65536*G = 76284*(Y-16) - 53281*(U-128) - 25625*(V-128)
- * 65536*R = 76284*(Y-16) + 104595*(U-128)
- *
- * Make sure the output values are within [0..255] range.
- */
-#define LIMIT_RGB(x) (((x) < 0) ? 0 : (((x) > 255) ? 255 : (x)))
-#define YUV_TO_RGB_BY_THE_BOOK(my, mu, mv, mr, mg, mb) { \
- int mm_y, mm_yc, mm_u, mm_v, mm_r, mm_g, mm_b; \
- mm_y = (my) - 16; \
- mm_u = (mu) - 128; \
- mm_v = (mv) - 128; \
- mm_yc = mm_y * 76284; \
- mm_b = (mm_yc + 132252 * mm_v) >> 16; \
- mm_g = (mm_yc - 53281 * mm_u - 25625 * mm_v) >> 16; \
- mm_r = (mm_yc + 104595 * mm_u) >> 16; \
- mb = LIMIT_RGB(mm_b); \
- mg = LIMIT_RGB(mm_g); \
- mr = LIMIT_RGB(mm_r); \
-}
-
-/* Debugging aid */
-#define USBVISION_SAY_AND_WAIT(what) { \
- wait_queue_head_t wq; \
- init_waitqueue_head(&wq); \
- printk(KERN_INFO "Say: %s\n", what); \
- interruptible_sleep_on_timeout(&wq, HZ * 3); \
-}
-
-/*
* This macro checks if usbvision is still operational. The 'usbvision'
* pointer must be valid, usbvision->dev must be valid, we are not
* removing the device and the device has not erred on us.
diff -up linux-2.6.39-rc2-/drivers/media/video/usbvision/usbvision-video.c linux-2.6.39-rc2/drivers/media/video/usbvision/usbvision-video.c
--- linux-2.6.39-rc2-/drivers/media/video/usbvision/usbvision-video.c 2011-04-27 22:08:32.000000000 +0200
+++ linux-2.6.39-rc2/drivers/media/video/usbvision/usbvision-video.c 2011-04-27 22:18:27.000000000 +0200
@@ -112,11 +112,6 @@ USBVISION_DRIVER_VERSION_PATCHLEVEL)
static int usbvision_nr;
static struct usbvision_v4l2_format_st usbvision_v4l2_format[] = {
- { 1, 1, 8, V4L2_PIX_FMT_GREY , "GREY" },
- { 1, 2, 16, V4L2_PIX_FMT_RGB565 , "RGB565" },
- { 1, 3, 24, V4L2_PIX_FMT_RGB24 , "RGB24" },
- { 1, 4, 32, V4L2_PIX_FMT_RGB32 , "RGB32" },
- { 1, 2, 16, V4L2_PIX_FMT_RGB555 , "RGB555" },
{ 1, 2, 16, V4L2_PIX_FMT_YUYV , "YUV422" },
};
@@ -1452,7 +1447,7 @@ static void usbvision_configure_video(st
return;
model = usbvision->dev_model;
- usbvision->palette = usbvision_v4l2_format[2]; /* V4L2_PIX_FMT_RGB24; */
+ usbvision->palette = usbvision_v4l2_format[0];
if (usbvision_device_data[usbvision->dev_model].vin_reg2_override) {
usbvision->vin_reg2_preset =
--
Ondrej Zary
next reply other threads:[~2011-04-27 20:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-27 20:41 Ondrej Zary [this message]
2011-04-28 2:48 ` [PATCH 4/4] usbvision: remove RGB format conversion Valdis.Kletnieks
2011-05-03 10:34 ` Mauro Carvalho Chehab
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=201104272241.38457.linux@rainbow-software.org \
--to=linux@rainbow-software.org \
--cc=dwainegarden@rogers.com \
--cc=hdegoede@redhat.com \
--cc=hverkuil@xs4all.nl \
--cc=joerg@heckenbach-aw.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.