Em 15-05-2012 10:16, Gianluca Gennari escreveu: > This patch: > http://patchwork.linuxtv.org/patch/10824/ > moved the file fixp-arith.h from drivers/input/ to include/linux/ . > > To make this file available to old kernels, we must include it in the > media_build package. > > The version included here comes from kernel 3.4-rc7. > > This patch corrects the following build error: > > media_build/v4l/ov534.c:38:30: error: linux/fixp-arith.h: No such file or directory > media_build/v4l/ov534.c: In function 'sethue': > media_build/v4l/ov534.c:1000: error: implicit declaration of function 'fixp_sin' > media_build/v4l/ov534.c:1001: error: implicit declaration of function 'fixp_cos' > > Tested on kernel 2.6.32-41-generic-pae (Ubuntu 10.04). > > Signed-off-by: Gianluca Gennari <gennarone@xxxxxxxxx > --- > linux/include/linux/fixp-arith.h | 87 ++++++++++++++++++++++++++++++++++++++ It is not that simple, as make clean will remove it. I can think on a few possible solutions for it: 1) just don't compile ov534 on older kernels; 2) add a backport patch that will dynamically create it; 3) add linux/include/linux/fixp-arith.h inside the tarball with: TARFILES += include/linux/fixp-arith.h Eventually, you can also tweak with the building system, but it doesn't sound a good idea to keep this header there as-is for kernels > 3.4, as some changes on this header can be added there. >From all above, (3) is the simpler one. I'll apply it. Regards, Mauro > 1 files changed, 87 insertions(+), 0 deletions(-) > create mode 100644 linux/include/linux/fixp-arith.h > > diff --git a/linux/include/linux/fixp-arith.h b/linux/include/linux/fixp-arith.h > new file mode 100644 > index 0000000..3089d73 > --- /dev/null > +++ b/linux/include/linux/fixp-arith.h > @@ -0,0 +1,87 @@ > +#ifndef _FIXP_ARITH_H > +#define _FIXP_ARITH_H > + > +/* > + * Simplistic fixed-point arithmetics. > + * Hmm, I'm probably duplicating some code :( > + * > + * Copyright (c) 2002 Johann Deneux > + */ > + > +/* > + * 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 > + * (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, write to the Free Software > + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA > + * > + * Should you need to contact me, the author, you can do so by > + * e-mail - mail your message to <johann.deneux@xxxxxxxxx> > + */ > + > +#include <linux/types.h> > + > +/* The type representing fixed-point values */ > +typedef s16 fixp_t; > + > +#define FRAC_N 8 > +#define FRAC_MASK ((1<<FRAC_N)-1) > + > +/* Not to be used directly. Use fixp_{cos,sin} */ > +static const fixp_t cos_table[46] = { > + 0x0100, 0x00FF, 0x00FF, 0x00FE, 0x00FD, 0x00FC, 0x00FA, 0x00F8, > + 0x00F6, 0x00F3, 0x00F0, 0x00ED, 0x00E9, 0x00E6, 0x00E2, 0x00DD, > + 0x00D9, 0x00D4, 0x00CF, 0x00C9, 0x00C4, 0x00BE, 0x00B8, 0x00B1, > + 0x00AB, 0x00A4, 0x009D, 0x0096, 0x008F, 0x0087, 0x0080, 0x0078, > + 0x0070, 0x0068, 0x005F, 0x0057, 0x004F, 0x0046, 0x003D, 0x0035, > + 0x002C, 0x0023, 0x001A, 0x0011, 0x0008, 0x0000 > +}; > + > + > +/* a: 123 -> 123.0 */ > +static inline fixp_t fixp_new(s16 a) > +{ > + return a<<FRAC_N; > +} > + > +/* a: 0xFFFF -> -1.0 > + 0x8000 -> 1.0 > + 0x0000 -> 0.0 > +*/ > +static inline fixp_t fixp_new16(s16 a) > +{ > + return ((s32)a)>>(16-FRAC_N); > +} > + > +static inline fixp_t fixp_cos(unsigned int degrees) > +{ > + int quadrant = (degrees / 90) & 3; > + unsigned int i = degrees % 90; > + > + if (quadrant == 1 || quadrant == 3) > + i = 90 - i; > + > + i >>= 1; > + > + return (quadrant == 1 || quadrant == 2)? -cos_table[i] : cos_table[i]; > +} > + > +static inline fixp_t fixp_sin(unsigned int degrees) > +{ > + return -fixp_cos(degrees + 90); > +} > + > +static inline fixp_t fixp_mult(fixp_t a, fixp_t b) > +{ > + return ((s32)(a*b))>>FRAC_N; > +} > + > +#endif -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
