6eba93573d
Doing a bunch of initialization every time /dev/video is opened, and thus for example when the udev rules probe for capabilities makes no sense, do it at driver load, resp. stream start instead. This is a preparation patch for allowing multiple opens of the /dev/video node. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
/* Linux driver for Philips webcam
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Decompression for chipset version 1
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(C) 2004-2006 Luc Saillard (luc@saillard.org)
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NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
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driver and thus may have bugs that are not present in the original version.
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Please send bug reports and support requests to <luc@saillard.org>.
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The decompression routines have been implemented by reverse-engineering the
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Nemosoft binary pwcx module. Caveat emptor.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "pwc-dec1.h"
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int pwc_dec1_init(struct pwc_device *pwc, int type, int release, void *buffer)
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{
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struct pwc_dec1_private *pdec;
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if (pwc->decompress_data == NULL) {
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pdec = kmalloc(sizeof(struct pwc_dec1_private), GFP_KERNEL);
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if (pdec == NULL)
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return -ENOMEM;
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pwc->decompress_data = pdec;
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}
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pdec = pwc->decompress_data;
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return 0;
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}
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