diff options
Diffstat (limited to 'drivers/media/video/gspca/pac_common.h')
| -rw-r--r-- | drivers/media/video/gspca/pac_common.h | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/drivers/media/video/gspca/pac_common.h b/drivers/media/video/gspca/pac_common.h deleted file mode 100644 index 8462a7c..0000000 --- a/drivers/media/video/gspca/pac_common.h +++ /dev/null @@ -1,134 +0,0 @@ -/* - * Pixart PAC207BCA / PAC73xx common functions - * - * Copyright (C) 2008 Hans de Goede <j.w.r.degoede@hhs.nl> - * Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li - * Copyleft (C) 2005 Michel Xhaard mxhaard@magic.fr - * - * V4L2 by Jean-Francois Moine <http://moinejf.free.fr> - * - * 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 - * - */ - -/* We calculate the autogain at the end of the transfer of a frame, at this - moment a frame with the old settings is being captured and transmitted. So - if we adjust the gain or exposure we must ignore atleast the next frame for - the new settings to come into effect before doing any other adjustments. */ -#define PAC_AUTOGAIN_IGNORE_FRAMES 2 - -static const unsigned char pac_sof_marker[5] = - { 0xff, 0xff, 0x00, 0xff, 0x96 }; - -/* - The following state machine finds the SOF marker sequence - 0xff, 0xff, 0x00, 0xff, 0x96 in a byte stream. - - +----------+ - | 0: START |<---------------\ - +----------+<-\ | - | \---/otherwise | - v 0xff | - +----------+ otherwise | - | 1 |--------------->* - | | ^ - +----------+ | - | | - v 0xff | - +----------+<-\0xff | - /->| |--/ | - | | 2 |--------------->* - | | | otherwise ^ - | +----------+ | - | | | - | v 0x00 | - | +----------+ | - | | 3 | | - | | |--------------->* - | +----------+ otherwise ^ - | | | - 0xff | v 0xff | - | +----------+ | - \--| 4 | | - | |----------------/ - +----------+ otherwise - | - v 0x96 - +----------+ - | FOUND | - +----------+ -*/ - -static unsigned char *pac_find_sof(u8 *sof_read, - unsigned char *m, int len) -{ - int i; - - /* Search for the SOF marker (fixed part) in the header */ - for (i = 0; i < len; i++) { - switch (*sof_read) { - case 0: - if (m[i] == 0xff) - *sof_read = 1; - break; - case 1: - if (m[i] == 0xff) - *sof_read = 2; - else - *sof_read = 0; - break; - case 2: - switch (m[i]) { - case 0x00: - *sof_read = 3; - break; - case 0xff: - /* stay in this state */ - break; - default: - *sof_read = 0; - } - break; - case 3: - if (m[i] == 0xff) - *sof_read = 4; - else - *sof_read = 0; - break; - case 4: - switch (m[i]) { - case 0x96: - /* Pattern found */ - PDEBUG(D_FRAM, - "SOF found, bytes to analyze: %u." - " Frame starts at byte #%u", - len, i + 1); - *sof_read = 0; - return m + i + 1; - break; - case 0xff: - *sof_read = 2; - break; - default: - *sof_read = 0; - } - break; - default: - *sof_read = 0; - } - } - - return NULL; -} |