From 9903c4e6973daa6579771ba67db415a7105d5e44 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: compat: handle __fls From: Trent Piepho __fls() was added for generic code in 2.6.29, existed for just 64-bit arches since 2.6.26 (v2.6.25-5228-g56a6b1e), and was x86-64 only before then. When __fls() doesn't exists we create an inline function that implements it via fls(), which has existed for longer. Priority: normal Signed-off-by: Trent Piepho --- v4l/compat.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/v4l/compat.h b/v4l/compat.h index 6a40e2a33..ce28da615 100644 --- a/v4l/compat.h +++ b/v4l/compat.h @@ -454,4 +454,19 @@ static inline int snd_card_create(int idx, const char *id, #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) #endif +/* __fls() was added for generic code in 2.6.29, existed for just 64-bit arches + * since 2.6.26 (v2.6.25-5228-g56a6b1e), and was x86-64 only before then. We + * only want this compat code when __fls doesn't exist, which 2.6.29 or later, + * non x86-64, and non 64-bit that's 2.6.26 or later. */ +#if !(LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29) || \ + defined(__x86_64__) || \ + (BITS_PER_LONG == 64 && LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26))) +/* This define will prevent breakage if __fls was already defined. */ +#define __fls v4l_compat_fls +static inline unsigned long v4l_compat_fls(unsigned long x) +{ + return fls(x) - 1; +} +#endif + #endif /* _COMPAT_H */ -- cgit v1.2.3 From 51c04c87bb11afe772c5cf797a12c71c602cff8c Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: v4l2: Create helper function for bounding and aligning images From: Trent Piepho Most hardware has limits on minimum and maximum image dimensions and also requirements about alignment. For example, image width must be even or a multiple of four. Some hardware has requirements that the total image size (width * height) be a multiple of some power of two. v4l_bound_align_image() will enforce min and max width and height, power of two alignment on width and height, and power of two alignment on total image size. It uses an efficient algorithm that will try to find the "closest" image size that meets the requirements. Priority: normal Signed-off-by: Trent Piepho --- linux/drivers/media/video/v4l2-common.c | 71 +++++++++++++++++++++++++++++++++ linux/include/media/v4l2-common.h | 10 +++++ 2 files changed, 81 insertions(+) diff --git a/linux/drivers/media/video/v4l2-common.c b/linux/drivers/media/video/v4l2-common.c index 8f2db1250..d81bae197 100644 --- a/linux/drivers/media/video/v4l2-common.c +++ b/linux/drivers/media/video/v4l2-common.c @@ -997,4 +997,75 @@ const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type) } EXPORT_SYMBOL_GPL(v4l2_i2c_tuner_addrs); +/* Clamp x to be between min and max, aligned to a multiple of 2^align. min + * and max don't have to be aligned, but there must be at least one valid + * value. E.g., min=17,max=31,align=4 is not allowed as there are no multiples + * of 16 between 17 and 31. */ +static unsigned int clamp_align(unsigned int x, unsigned int min, + unsigned int max, unsigned int align) +{ + /* Bits that must be zero to be aligned */ + unsigned int mask = ~((1 << align) - 1); + + /* Round to nearest aligned value */ + if (align) + x = (x + (1 << (align - 1))) & mask; + + /* Clamp to aligned value of min and max */ + if (x < min) + x = (min + ~mask) & mask; + else if (x > max) + x = max & mask; + + return x; +} + +/* Bound an image to have a width between wmin and wmax, and height between + * hmin and hmax, inclusive. Additionally, the width will be a multiple of + * 2^walign, the height will be a multiple of 2^halign, and the overall size + * (width*height) will be a multiple of 2^salign. The image may be shrunk + * or enlarged to fit the alignment constraints. + * + * The width or height maximum must not be smaller than the corresponding + * minimum. The alignments must not be so high there are no possible image + * sizes within the allowed bounds. wmin and hmin must be at least 1 + * (don't use 0). If you don't care about a certain alignment, specify 0, + * as 2^0 is 1 and one byte alignment is equivalent to no alignment. If + * you only want to adjust downward, specify a maximum that's the same as + * the initial value. + */ +void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax, + unsigned int walign, + u32 *h, unsigned int hmin, unsigned int hmax, + unsigned int halign, unsigned int salign) +{ + *w = clamp_align(*w, wmin, wmax, walign); + *h = clamp_align(*h, hmin, hmax, halign); + + /* Usually we don't need to align the size and are done now. */ + if (!salign) + return; + + /* How much alignment do we have? */ + walign = __ffs(*w); + halign = __ffs(*h); + /* Enough to satisfy the image alignment? */ + if (walign + halign < salign) { + /* Max walign where there is still a valid width */ + unsigned int wmaxa = __fls(wmax ^ (wmin - 1)); + + /* up the smaller alignment until we have enough */ + do { + if (walign <= halign && walign < wmaxa) { + *w = clamp_align(*w, wmin, wmax, walign + 1); + walign = __ffs(*w); + } else { + *h = clamp_align(*h, hmin, hmax, halign + 1); + halign = __ffs(*h); + } + } while (halign + walign < salign); + } +} +EXPORT_SYMBOL_GPL(v4l_bound_align_image); + #endif diff --git a/linux/include/media/v4l2-common.h b/linux/include/media/v4l2-common.h index 2e1e3a293..54728d4c0 100644 --- a/linux/include/media/v4l2-common.h +++ b/linux/include/media/v4l2-common.h @@ -198,4 +198,14 @@ struct v4l2_routing { u32 output; }; +/* ------------------------------------------------------------------------- */ + +/* Miscellaneous helper functions */ + +void v4l_bound_align_image(unsigned int *w, unsigned int wmin, + unsigned int wmax, unsigned int walign, + unsigned int *h, unsigned int hmin, + unsigned int hmax, unsigned int halign, + unsigned int salign); + #endif /* V4L2_COMMON_H_ */ -- cgit v1.2.3 From 9b58b19cf0eba5a8a77bbbd58df57194a5688a80 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: pxa-camera: Use v4l bounding/alignment function From: Trent Piepho The v4l function has a better algorithm for aligning image size. For instance the old code would change 159x243 into 156x240 to meet the alignment requirements. The new function will use 160x243, which is a lot closer to what was asked for originally. Priority: normal Signed-off-by: Trent Piepho CC: Robert Jarzmik CC: Guennadi Liakhovetski --- linux/drivers/media/video/pxa_camera.c | 36 +++++++--------------------------- 1 file changed, 7 insertions(+), 29 deletions(-) diff --git a/linux/drivers/media/video/pxa_camera.c b/linux/drivers/media/video/pxa_camera.c index 35642c430..2c122ec90 100644 --- a/linux/drivers/media/video/pxa_camera.c +++ b/linux/drivers/media/video/pxa_camera.c @@ -174,13 +174,6 @@ CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \ CICR0_EOFM | CICR0_FOM) -/* - * YUV422P picture size should be a multiple of 16, so the heuristic aligns - * height, width on 4 byte boundaries to reach the 16 multiple for the size. - */ -#define YUV422P_X_Y_ALIGN 4 -#define YUV422P_SIZE_ALIGN YUV422P_X_Y_ALIGN * YUV422P_X_Y_ALIGN - /* * Structures */ @@ -1410,28 +1403,13 @@ static int pxa_camera_try_fmt(struct soc_camera_device *icd, return -EINVAL; } - /* limit to pxa hardware capabilities */ - if (pix->height < 32) - pix->height = 32; - if (pix->height > 2048) - pix->height = 2048; - if (pix->width < 48) - pix->width = 48; - if (pix->width > 2048) - pix->width = 2048; - pix->width &= ~0x01; - - /* - * YUV422P planar format requires images size to be a 16 bytes - * multiple. If not, zeros will be inserted between Y and U planes, and - * U and V planes, and YUV422P standard would be violated. - */ - if (xlate->host_fmt->fourcc == V4L2_PIX_FMT_YUV422P) { - if (!IS_ALIGNED(pix->width * pix->height, YUV422P_SIZE_ALIGN)) - pix->height = ALIGN(pix->height, YUV422P_X_Y_ALIGN); - if (!IS_ALIGNED(pix->width * pix->height, YUV422P_SIZE_ALIGN)) - pix->width = ALIGN(pix->width, YUV422P_X_Y_ALIGN); - } + /* Limit to pxa hardware capabilities. YUV422P planar format requires + * images size to be a multiple of 16 bytes. If not, zeros will be + * inserted between Y and U planes, and U and V planes, which violates + * the YUV422P standard. */ + v4l2_bound_align_image(&pix->width, 48, 2048, 1, + &pix->height, 32, 2048, 0, + xlate->host_fmt->fourcc == V4L2_PIX_FMT_YUV422P ? 4 : 0); pix->bytesperline = pix->width * DIV_ROUND_UP(xlate->host_fmt->depth, 8); -- cgit v1.2.3 From fc32b7aec72765c7ee074348f4bf6f8f920aacc4 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: sh_mobile_ceu_camera: Use v4l bounding/alignment function From: Trent Piepho The v4l function has a better algorithm for aligning image size. Priority: normal Signed-off-by: Trent Piepho --- linux/drivers/media/video/sh_mobile_ceu_camera.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/linux/drivers/media/video/sh_mobile_ceu_camera.c b/linux/drivers/media/video/sh_mobile_ceu_camera.c index bf0b176f9..7ea2a0edf 100644 --- a/linux/drivers/media/video/sh_mobile_ceu_camera.c +++ b/linux/drivers/media/video/sh_mobile_ceu_camera.c @@ -690,16 +690,8 @@ static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd, /* FIXME: calculate using depth and bus width */ - if (f->fmt.pix.height < 4) - f->fmt.pix.height = 4; - if (f->fmt.pix.height > 1920) - f->fmt.pix.height = 1920; - if (f->fmt.pix.width < 2) - f->fmt.pix.width = 2; - if (f->fmt.pix.width > 2560) - f->fmt.pix.width = 2560; - f->fmt.pix.width &= ~0x01; - f->fmt.pix.height &= ~0x03; + v4l_bound_align_image(&f->fmt.pix.width, 2, 2560, 1, + &f->fmt.pix.height, 4, 1920, 2, 0); f->fmt.pix.bytesperline = f->fmt.pix.width * DIV_ROUND_UP(xlate->host_fmt->depth, 8); -- cgit v1.2.3 From 8c986b899b3f035b94b4ee568ce00a8a48c12f45 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: zoran: Use v4l bounding/alignment functiob From: Trent Piepho The v4l function has a better algorithm for aligning image size. Priority: normal Signed-off-by: Trent Piepho --- linux/drivers/media/video/zoran/zoran_driver.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/linux/drivers/media/video/zoran/zoran_driver.c b/linux/drivers/media/video/zoran/zoran_driver.c index 793395074..8c17d47b3 100644 --- a/linux/drivers/media/video/zoran/zoran_driver.c +++ b/linux/drivers/media/video/zoran/zoran_driver.c @@ -2096,16 +2096,10 @@ static int zoran_try_fmt_vid_cap(struct file *file, void *__fh, return -EINVAL; } - bpp = (zoran_formats[i].depth + 7) / 8; - fmt->fmt.pix.width &= ~((bpp == 2) ? 1 : 3); - if (fmt->fmt.pix.width > BUZ_MAX_WIDTH) - fmt->fmt.pix.width = BUZ_MAX_WIDTH; - if (fmt->fmt.pix.width < BUZ_MIN_WIDTH) - fmt->fmt.pix.width = BUZ_MIN_WIDTH; - if (fmt->fmt.pix.height > BUZ_MAX_HEIGHT) - fmt->fmt.pix.height = BUZ_MAX_HEIGHT; - if (fmt->fmt.pix.height < BUZ_MIN_HEIGHT) - fmt->fmt.pix.height = BUZ_MIN_HEIGHT; + bpp = DIV_ROUND_UP(zoran_formats[i].depth, 8); + v4l_bound_align_image( + &fmt->fmt.pix.width, BUZ_MIN_WIDTH, BUZ_MAX_WIDTH, bpp == 2 ? 1 : 2, + &fmt->fmt.pix.height, BUZ_MIN_HEIGHT, BUZ_MAX_HEIGHT, 0, 0); mutex_unlock(&zr->resource_lock); return 0; -- cgit v1.2.3 From 1892adfab10cb9deee0fef6c601bf0ed01daa384 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: vivi: Use v4l bounding/alignment function From: Trent Piepho The v4l function has a better algorithm for aligning image size. Priority: normal Signed-off-by: Trent Piepho --- linux/drivers/media/video/vivi.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/linux/drivers/media/video/vivi.c b/linux/drivers/media/video/vivi.c index e3bc2b0a3..fe39b7326 100644 --- a/linux/drivers/media/video/vivi.c +++ b/linux/drivers/media/video/vivi.c @@ -886,15 +886,8 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, maxh = norm_maxh(); f->fmt.pix.field = field; - if (f->fmt.pix.height < 32) - f->fmt.pix.height = 32; - if (f->fmt.pix.height > maxh) - f->fmt.pix.height = maxh; - if (f->fmt.pix.width < 48) - f->fmt.pix.width = 48; - if (f->fmt.pix.width > maxw) - f->fmt.pix.width = maxw; - f->fmt.pix.width &= ~0x03; + v4l_bound_align_image(&f->fmt.pix.width, 48, maxw, 2, + &f->fmt.pix.height, 32, maxh, 0, 0); f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3; f->fmt.pix.sizeimage = -- cgit v1.2.3 From 6ebc4db113b06e0a7390faa61f891ef23d3a483a Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: saa7134: Use v4l bounding/alignment function From: Trent Piepho The v4l function has a better algorithm for aligning image size. Priority: normal Signed-off-by: Trent Piepho --- linux/drivers/media/video/saa7134/saa7134-video.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/linux/drivers/media/video/saa7134/saa7134-video.c b/linux/drivers/media/video/saa7134/saa7134-video.c index 26f1727e6..ddf842a0d 100644 --- a/linux/drivers/media/video/saa7134/saa7134-video.c +++ b/linux/drivers/media/video/saa7134/saa7134-video.c @@ -1646,15 +1646,8 @@ static int saa7134_try_fmt_vid_cap(struct file *file, void *priv, } 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; - f->fmt.pix.width &= ~0x03; + v4l_bound_align_image(&f->fmt.pix.width, 48, maxw, 2, + &f->fmt.pix.height, 32, maxh, 0, 0); f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3; f->fmt.pix.sizeimage = -- cgit v1.2.3 From 6c671f37ed7cd5bbe5c041761851f903361f8687 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: cx88: Use v4l bounding/alignment function From: Trent Piepho The v4l function has a better algorithm for aligning image size. Priority: normal Signed-off-by: Trent Piepho --- linux/drivers/media/video/cx88/cx88-video.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/linux/drivers/media/video/cx88/cx88-video.c b/linux/drivers/media/video/cx88/cx88-video.c index 2dfa4c9c3..70b086fb7 100644 --- a/linux/drivers/media/video/cx88/cx88-video.c +++ b/linux/drivers/media/video/cx88/cx88-video.c @@ -1339,15 +1339,8 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, } f->fmt.pix.field = field; - if (f->fmt.pix.height < 32) - f->fmt.pix.height = 32; - if (f->fmt.pix.height > maxh) - f->fmt.pix.height = maxh; - if (f->fmt.pix.width < 48) - f->fmt.pix.width = 48; - if (f->fmt.pix.width > maxw) - f->fmt.pix.width = maxw; - f->fmt.pix.width &= ~0x03; + v4l_bound_align_image(&f->fmt.pix.width, 48, maxw, 2, + &f->fmt.pix.height, 32, maxh, 0, 0); f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3; f->fmt.pix.sizeimage = -- cgit v1.2.3 From b0fc719e0220c50eb50f77552fc00b0adc11c5d0 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: w8968cf: Use v4l bounding/alignment function From: Trent Piepho The v4l function has a better algorithm for aligning image size. The existing code was casting pointers to u32 and to unsigned int into pointers to u16. This could mess up if someone passed in an image size greater than 65,535 and on big-endian platforms it won't work at all. The existing bounding code would shrink an image if it was too big, but returned ERANGE if it was too small. The code will not shrink or expand as necessary. Priority: normal Signed-off-by: Trent Piepho --- linux/drivers/media/video/w9968cf.c | 35 ++++++++++++++--------------------- 1 file changed, 14 insertions(+), 21 deletions(-) diff --git a/linux/drivers/media/video/w9968cf.c b/linux/drivers/media/video/w9968cf.c index d51566ddc..86738d186 100644 --- a/linux/drivers/media/video/w9968cf.c +++ b/linux/drivers/media/video/w9968cf.c @@ -464,7 +464,7 @@ static int w9968cf_set_picture(struct w9968cf_device*, struct video_picture); static int w9968cf_set_window(struct w9968cf_device*, struct video_window); static int w9968cf_postprocess_frame(struct w9968cf_device*, struct w9968cf_frame_t*); -static int w9968cf_adjust_window_size(struct w9968cf_device*, u16* w, u16* h); +static int w9968cf_adjust_window_size(struct w9968cf_device*, u32 *w, u32 *h); static void w9968cf_init_framelist(struct w9968cf_device*); static void w9968cf_push_frame(struct w9968cf_device*, u8 f_num); static void w9968cf_pop_frame(struct w9968cf_device*,struct w9968cf_frame_t**); @@ -1777,8 +1777,7 @@ w9968cf_set_window(struct w9968cf_device* cam, struct video_window win) #define UNSC(x) ((x) >> 10) /* Make sure we are using a supported resolution */ - if ((err = w9968cf_adjust_window_size(cam, (u16*)&win.width, - (u16*)&win.height))) + if ((err = w9968cf_adjust_window_size(cam, &win.width, &win.height))) goto error; /* Scaling factors */ @@ -1928,12 +1927,9 @@ error: Return 0 on success, -1 otherwise. --------------------------------------------------------------------------*/ static int -w9968cf_adjust_window_size(struct w9968cf_device* cam, u16* width, u16* height) +w9968cf_adjust_window_size(struct w9968cf_device *cam, u32 *width, u32 *height) { - u16 maxw, maxh; - - if ((*width < cam->minwidth) || (*height < cam->minheight)) - return -ERANGE; + unsigned int maxw, maxh, align; maxw = cam->upscaling && !(cam->vpp_flag & VPP_DECOMPRESSION) && w9968cf_vpp ? max((u16)W9968CF_MAX_WIDTH, cam->maxwidth) @@ -1941,16 +1937,10 @@ w9968cf_adjust_window_size(struct w9968cf_device* cam, u16* width, u16* height) maxh = cam->upscaling && !(cam->vpp_flag & VPP_DECOMPRESSION) && w9968cf_vpp ? max((u16)W9968CF_MAX_HEIGHT, cam->maxheight) : cam->maxheight; + align = (cam->vpp_flag & VPP_DECOMPRESSION) ? 4 : 0; - if (*width > maxw) - *width = maxw; - if (*height > maxh) - *height = maxh; - - if (cam->vpp_flag & VPP_DECOMPRESSION) { - *width &= ~15L; /* multiple of 16 */ - *height &= ~15L; - } + v4l_bound_align_image(width, cam->minwidth, maxw, align, + height, cam->minheight, maxh, align, 0); PDBGG("Window size adjusted w=%u, h=%u ", *width, *height) @@ -3057,8 +3047,8 @@ static long w9968cf_v4l_ioctl(struct file *filp, if (win.clipcount != 0 || win.flags != 0) return -EINVAL; - if ((err = w9968cf_adjust_window_size(cam, (u16*)&win.width, - (u16*)&win.height))) { + if ((err = w9968cf_adjust_window_size(cam, &win.width, + &win.height))) { DBG(4, "Resolution not supported (%ux%u). " "VIDIOCSWIN failed", win.width, win.height) return err; @@ -3130,6 +3120,7 @@ static long w9968cf_v4l_ioctl(struct file *filp, { struct video_mmap mmap; struct w9968cf_frame_t* fr; + u32 w, h; int err = 0; if (copy_from_user(&mmap, arg, sizeof(mmap))) @@ -3178,8 +3169,10 @@ static long w9968cf_v4l_ioctl(struct file *filp, } } - if ((err = w9968cf_adjust_window_size(cam, (u16*)&mmap.width, - (u16*)&mmap.height))) { + w = mmap.width; h = mmap.height; + err = w9968cf_adjust_window_size(cam, &w, &h); + mmap.width = w; mmap.height = h; + if (err) { DBG(4, "Resolution not supported (%dx%d). " "VIDIOCMCAPTURE failed", mmap.width, mmap.height) -- cgit v1.2.3 From 3b017fe86fc86aebdfb6430c70d4e9f9fb944492 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: cx23885: Use v4l bounding/alignment function From: Trent Piepho The v4l function has a better algorithm for aligning image size. Priority: normal Signed-off-by: Trent Piepho --- linux/drivers/media/video/cx23885/cx23885-video.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/linux/drivers/media/video/cx23885/cx23885-video.c b/linux/drivers/media/video/cx23885/cx23885-video.c index 2855a49b5..378943605 100644 --- a/linux/drivers/media/video/cx23885/cx23885-video.c +++ b/linux/drivers/media/video/cx23885/cx23885-video.c @@ -1035,15 +1035,8 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, } f->fmt.pix.field = field; - if (f->fmt.pix.height < 32) - f->fmt.pix.height = 32; - if (f->fmt.pix.height > maxh) - f->fmt.pix.height = maxh; - if (f->fmt.pix.width < 48) - f->fmt.pix.width = 48; - if (f->fmt.pix.width > maxw) - f->fmt.pix.width = maxw; - f->fmt.pix.width &= ~0x03; + v4l_bound_align_image(&f->fmt.pix.width, 48, maxw, 2, + &f->fmt.pix.height, 32, maxh, 0, 0); f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3; f->fmt.pix.sizeimage = -- cgit v1.2.3 From 63242b556aeb302ca2feab368b784eb1e8ff2df0 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: mt9: Use v4l bounding/alignment function From: Trent Piepho The v4l function has a better algorithm for aligning image size. Priority: normal Signed-off-by: Trent Piepho CC: Guennadi Liakhovetski --- linux/drivers/media/video/mt9m001.c | 12 +++--------- linux/drivers/media/video/mt9t031.c | 14 +++----------- linux/drivers/media/video/mt9v022.c | 12 +++--------- 3 files changed, 9 insertions(+), 29 deletions(-) diff --git a/linux/drivers/media/video/mt9m001.c b/linux/drivers/media/video/mt9m001.c index 8d61ad30a..e609d68c4 100644 --- a/linux/drivers/media/video/mt9m001.c +++ b/linux/drivers/media/video/mt9m001.c @@ -280,15 +280,9 @@ static int mt9m001_try_fmt(struct soc_camera_device *icd, { struct v4l2_pix_format *pix = &f->fmt.pix; - if (pix->height < 32 + icd->y_skip_top) - pix->height = 32 + icd->y_skip_top; - if (pix->height > 1024 + icd->y_skip_top) - pix->height = 1024 + icd->y_skip_top; - if (pix->width < 48) - pix->width = 48; - if (pix->width > 1280) - pix->width = 1280; - pix->width &= ~0x01; /* has to be even, unsure why was ~3 */ + v4l_bound_align_image(&pix->width, 48, 1280, 1, + &pix->height, 32 + icd->y_skip_top, + 1024 + icd->y_skip_top, 0, 0); return 0; } diff --git a/linux/drivers/media/video/mt9t031.c b/linux/drivers/media/video/mt9t031.c index 381dd0fbe..a57051522 100644 --- a/linux/drivers/media/video/mt9t031.c +++ b/linux/drivers/media/video/mt9t031.c @@ -385,17 +385,9 @@ static int mt9t031_try_fmt(struct soc_camera_device *icd, { struct v4l2_pix_format *pix = &f->fmt.pix; - if (pix->height < MT9T031_MIN_HEIGHT) - pix->height = MT9T031_MIN_HEIGHT; - if (pix->height > MT9T031_MAX_HEIGHT) - pix->height = MT9T031_MAX_HEIGHT; - if (pix->width < MT9T031_MIN_WIDTH) - pix->width = MT9T031_MIN_WIDTH; - if (pix->width > MT9T031_MAX_WIDTH) - pix->width = MT9T031_MAX_WIDTH; - - pix->width &= ~0x01; /* has to be even */ - pix->height &= ~0x01; /* has to be even */ + v4l_bound_align_image( + &pix->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, + &pix->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); return 0; } diff --git a/linux/drivers/media/video/mt9v022.c b/linux/drivers/media/video/mt9v022.c index 016bcdfcf..4841e6eea 100644 --- a/linux/drivers/media/video/mt9v022.c +++ b/linux/drivers/media/video/mt9v022.c @@ -364,15 +364,9 @@ static int mt9v022_try_fmt(struct soc_camera_device *icd, { struct v4l2_pix_format *pix = &f->fmt.pix; - if (pix->height < 32 + icd->y_skip_top) - pix->height = 32 + icd->y_skip_top; - if (pix->height > 480 + icd->y_skip_top) - pix->height = 480 + icd->y_skip_top; - if (pix->width < 48) - pix->width = 48; - if (pix->width > 752) - pix->width = 752; - pix->width &= ~0x03; /* ? */ + v4l_bound_align_image(&pix->width, 48, 752, 2 /* ? */, + &pix->height, 32 + icd->y_skip_top, + 480 + icd->y_skip_top, 0, 0); return 0; } -- cgit v1.2.3 From 89238d5360d8f8530addc8728b8681f05921fbb0 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: cx231xx: Use v4l bounding/alignment function From: Trent Piepho The v4l function has a better algorithm for aligning image size. Priority: normal Signed-off-by: Trent Piepho CC: Srinivasa Deevi --- linux/drivers/media/video/cx231xx/cx231xx-video.c | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-) diff --git a/linux/drivers/media/video/cx231xx/cx231xx-video.c b/linux/drivers/media/video/cx231xx/cx231xx-video.c index 638a8d3e4..6ed752c22 100644 --- a/linux/drivers/media/video/cx231xx/cx231xx-video.c +++ b/linux/drivers/media/video/cx231xx/cx231xx-video.c @@ -955,8 +955,8 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, { struct cx231xx_fh *fh = priv; struct cx231xx *dev = fh->dev; - int width = f->fmt.pix.width; - int height = f->fmt.pix.height; + unsigned int width = f->fmt.pix.width; + unsigned int height = f->fmt.pix.height; unsigned int maxw = norm_maxw(dev); unsigned int maxh = norm_maxh(dev); unsigned int hscale, vscale; @@ -971,17 +971,7 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, /* width must even because of the YUYV format height must be even because of interlacing */ - height &= 0xfffe; - width &= 0xfffe; - - if (unlikely(height < 32)) - height = 32; - if (unlikely(height > maxh)) - height = maxh; - if (unlikely(width < 48)) - width = 48; - if (unlikely(width > maxw)) - width = maxw; + v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1, 0); get_scale(dev, width, height, &hscale, &vscale); -- cgit v1.2.3 From ed377dd0de1bcd6b8df32c6ad057d9e0fc0def29 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: em28xx: Use v4l bounding/alignment function From: Trent Piepho The v4l function has a better algorithm for aligning image size. It appears that the em2800 can only scale by 50% or 100%, i.e. the only heights supported might be 240 and 480. In that case the old code would set any height other than 240 to 480. Request 240 get 240, but request 239 and then you get 480. Change it to round to the nearest supported value. Priority: normal Signed-off-by: Trent Piepho --- linux/drivers/media/video/em28xx/em28xx-video.c | 38 ++++++++----------------- 1 file changed, 12 insertions(+), 26 deletions(-) diff --git a/linux/drivers/media/video/em28xx/em28xx-video.c b/linux/drivers/media/video/em28xx/em28xx-video.c index 1614e5fc4..63d21698c 100644 --- a/linux/drivers/media/video/em28xx/em28xx-video.c +++ b/linux/drivers/media/video/em28xx/em28xx-video.c @@ -691,8 +691,8 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, { struct em28xx_fh *fh = priv; struct em28xx *dev = fh->dev; - int width = f->fmt.pix.width; - int height = f->fmt.pix.height; + unsigned int width = f->fmt.pix.width; + unsigned int height = f->fmt.pix.height; unsigned int maxw = norm_maxw(dev); unsigned int maxh = norm_maxh(dev); unsigned int hscale, vscale; @@ -705,34 +705,20 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, return -EINVAL; } - /* width must even because of the YUYV format - height must be even because of interlacing */ - height &= 0xfffe; - width &= 0xfffe; - - if (unlikely(height < 32)) - height = 32; - if (unlikely(height > maxh)) - height = maxh; - if (unlikely(width < 48)) - width = 48; - if (unlikely(width > maxw)) - width = maxw; - if (dev->board.is_em2800) { /* the em2800 can only scale down to 50% */ - if (height % (maxh / 2)) - height = maxh; - if (width % (maxw / 2)) - width = maxw; - /* according to empiatech support */ - /* the MaxPacketSize is to small to support */ - /* framesizes larger than 640x480 @ 30 fps */ - /* or 640x576 @ 25 fps. As this would cut */ - /* of a part of the image we prefer */ - /* 360x576 or 360x480 for now */ + height = height > (3 * maxh / 4) ? maxh : maxh / 2; + width = width > (3 * maxw / 4) ? maxw : maxw / 2; + /* According to empiatech support the MaxPacketSize is too small + * to support framesizes larger than 640x480 @ 30 fps or 640x576 + * @ 25 fps. As this would cut of a part of the image we prefer + * 360x576 or 360x480 for now */ if (width == maxw && height == maxh) width /= 2; + } else { + /* width must even because of the YUYV format + height must be even because of interlacing */ + v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1, 0); } get_scale(dev, width, height, &hscale, &vscale); -- cgit v1.2.3 From 0b81474a751308c61db74ee4088c8b557b913c3c Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sat, 30 May 2009 17:45:46 -0700 Subject: cx231xx: TRY_FMT should not actually set anything From: Trent Piepho In the TRY_FMT handler the function get_scale() is called to find what the scaler hardware will produce for a requested size. The problem is that get_scale(struct cx231xx *dev, ..., unsigned int *vscale, unsigned int *hscale) saves the calculated scale values into both the pointer arguments and into dev's hscale and vscale fields. TRY_FMT shouldn't actually change anything in the device state. The code to in get_scale() that writes to dev->[hv]scale can just be deleted. In all cases when dev's fields should be modified, get_scale() was called with get_scale(dev, ..., &dev->hscale, &dev->vscale), so dev was getting updated anyway. This didn't actually cause a problem because nothing ever actually made use of the hscale and vscale fields. I changed cx231xx_resolution_set() to use those fields rather than re-calculate them with a call to get_scale(). Updating [hv]scale in cx231xx_resolution_set() isn't necessary because every call of cx231xx_resolution_set() was already preceded by a call to get_scale() or setting the [hv]scale fields, so they will be always be up-to-date w.r.t. width and height. Removing the call to get_scale() from cx231xx_resolution_set() allowed making get_scale() a static function, which is a good thing for something with such a short name. There is already another function with the same name in the em28xx driver, but that one is static. Priority: normal Signed-off-by: Trent Piepho --- linux/drivers/media/video/cx231xx/cx231xx-avcore.c | 17 ++++------------- linux/drivers/media/video/cx231xx/cx231xx-video.c | 10 +++------- linux/drivers/media/video/cx231xx/cx231xx.h | 3 --- 3 files changed, 7 insertions(+), 23 deletions(-) diff --git a/linux/drivers/media/video/cx231xx/cx231xx-avcore.c b/linux/drivers/media/video/cx231xx/cx231xx-avcore.c index 6a9464079..bbbb3f50e 100644 --- a/linux/drivers/media/video/cx231xx/cx231xx-avcore.c +++ b/linux/drivers/media/video/cx231xx/cx231xx-avcore.c @@ -1052,22 +1052,13 @@ int cx231xx_set_audio_decoder_input(struct cx231xx *dev, /* Set resolution of the video */ int cx231xx_resolution_set(struct cx231xx *dev) { - int width, height; - u32 hscale, vscale; - int status = 0; - - width = dev->width; - height = dev->height; - - get_scale(dev, width, height, &hscale, &vscale); - /* set horzontal scale */ - status = vid_blk_write_word(dev, HSCALE_CTRL, hscale); + int status = vid_blk_write_word(dev, HSCALE_CTRL, dev->hscale); + if (status) + return status; /* set vertical scale */ - status = vid_blk_write_word(dev, VSCALE_CTRL, vscale); - - return status; + return vid_blk_write_word(dev, VSCALE_CTRL, dev->vscale); } /****************************************************************************** diff --git a/linux/drivers/media/video/cx231xx/cx231xx-video.c b/linux/drivers/media/video/cx231xx/cx231xx-video.c index 6ed752c22..e00edd0aa 100644 --- a/linux/drivers/media/video/cx231xx/cx231xx-video.c +++ b/linux/drivers/media/video/cx231xx/cx231xx-video.c @@ -893,9 +893,9 @@ static int check_dev(struct cx231xx *dev) return 0; } -void get_scale(struct cx231xx *dev, - unsigned int width, unsigned int height, - unsigned int *hscale, unsigned int *vscale) +static void get_scale(struct cx231xx *dev, + unsigned int width, unsigned int height, + unsigned int *hscale, unsigned int *vscale) { unsigned int maxw = norm_maxw(dev); unsigned int maxh = norm_maxh(dev); @@ -907,10 +907,6 @@ void get_scale(struct cx231xx *dev, *vscale = (((unsigned long)maxh) << 12) / height - 4096L; if (*vscale >= 0x4000) *vscale = 0x3fff; - - dev->hscale = *hscale; - dev->vscale = *vscale; - } /* ------------------------------------------------------------------ diff --git a/linux/drivers/media/video/cx231xx/cx231xx.h b/linux/drivers/media/video/cx231xx/cx231xx.h index c436f2b0d..051ca21c1 100644 --- a/linux/drivers/media/video/cx231xx/cx231xx.h +++ b/linux/drivers/media/video/cx231xx/cx231xx.h @@ -731,9 +731,6 @@ int cx231xx_set_video_input_mux(struct cx231xx *dev, u8 input); int cx231xx_set_decoder_video_input(struct cx231xx *dev, u8 pin_type, u8 input); int cx231xx_do_mode_ctrl_overrides(struct cx231xx *dev); int cx231xx_set_audio_input(struct cx231xx *dev, u8 input); -void get_scale(struct cx231xx *dev, - unsigned int width, unsigned int height, - unsigned int *hscale, unsigned int *vscale); /* Provided by cx231xx-video.c */ int cx231xx_register_extension(struct cx231xx_ops *dev); -- cgit v1.2.3