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fd9871f70c
Based on 1 normalized pattern(s): 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 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 50 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154042.917228456@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
157 lines
5.2 KiB
C
157 lines
5.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef JPEG_H
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#define JPEG_H 1
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/*
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* Insert a JPEG header at start of frame
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*
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* This module is used by the gspca subdrivers.
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* A special case is done for Conexant webcams.
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*
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* Copyright (C) Jean-Francois Moine (http://moinejf.free.fr)
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*/
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/*
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* generation options
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* CONEX_CAM Conexant if present
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*/
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/* JPEG header */
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static const u8 jpeg_head[] = {
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0xff, 0xd8, /* jpeg */
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/* quantization table quality 50% */
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0xff, 0xdb, 0x00, 0x84, /* DQT */
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0,
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#define JPEG_QT0_OFFSET 7
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0x10, 0x0b, 0x0c, 0x0e, 0x0c, 0x0a, 0x10, 0x0e,
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0x0d, 0x0e, 0x12, 0x11, 0x10, 0x13, 0x18, 0x28,
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0x1a, 0x18, 0x16, 0x16, 0x18, 0x31, 0x23, 0x25,
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0x1d, 0x28, 0x3a, 0x33, 0x3d, 0x3c, 0x39, 0x33,
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0x38, 0x37, 0x40, 0x48, 0x5c, 0x4e, 0x40, 0x44,
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0x57, 0x45, 0x37, 0x38, 0x50, 0x6d, 0x51, 0x57,
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0x5f, 0x62, 0x67, 0x68, 0x67, 0x3e, 0x4d, 0x71,
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0x79, 0x70, 0x64, 0x78, 0x5c, 0x65, 0x67, 0x63,
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1,
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#define JPEG_QT1_OFFSET 72
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0x11, 0x12, 0x12, 0x18, 0x15, 0x18, 0x2f, 0x1a,
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0x1a, 0x2f, 0x63, 0x42, 0x38, 0x42, 0x63, 0x63,
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0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
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0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
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0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
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0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
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0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
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0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
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/* huffman table */
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0xff, 0xc4, 0x01, 0xa2,
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0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
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0x07, 0x08, 0x09, 0x0a, 0x0b, 0x01, 0x00, 0x03,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
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0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
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0x0a, 0x0b, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03,
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0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00,
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0x00, 0x01, 0x7d, 0x01, 0x02, 0x03, 0x00, 0x04,
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0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13,
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0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81,
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0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, 0xc1, 0x15,
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0x52, 0xd1, 0xf0, 0x24, 0x33, 0x62, 0x72, 0x82,
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0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25,
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0x26, 0x27, 0x28, 0x29, 0x2a, 0x34, 0x35, 0x36,
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0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46,
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0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56,
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0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66,
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0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76,
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0x77, 0x78, 0x79, 0x7a, 0x83, 0x84, 0x85, 0x86,
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0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95,
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0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4,
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0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3,
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0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2,
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0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca,
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0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9,
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0xda, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
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0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5,
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0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0x11, 0x00, 0x02,
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0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05,
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0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01,
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0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06,
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0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22,
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0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1,
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0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62,
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0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25,
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0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, 0x27, 0x28,
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0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a,
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0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a,
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0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a,
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0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a,
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0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a,
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0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
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0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
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0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
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0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
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0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
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0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
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0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe2, 0xe3,
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0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2,
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0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa,
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#ifdef CONEX_CAM
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/* the Conexant frames start with SOF0 */
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#define JPEG_HDR_SZ 556
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#else
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0xff, 0xc0, 0x00, 0x11, /* SOF0 (start of frame 0 */
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0x08, /* data precision */
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#define JPEG_HEIGHT_OFFSET 561
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0x01, 0xe0, /* height */
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0x02, 0x80, /* width */
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0x03, /* component number */
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0x01,
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0x21, /* samples Y */
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0x00, /* quant Y */
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0x02, 0x11, 0x01, /* samples CbCr - quant CbCr */
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0x03, 0x11, 0x01,
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0xff, 0xda, 0x00, 0x0c, /* SOS (start of scan) */
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0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11, 0x00, 0x3f, 0x00
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#define JPEG_HDR_SZ 589
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#endif
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};
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/* define the JPEG header */
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static void jpeg_define(u8 *jpeg_hdr,
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int height,
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int width,
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int samplesY)
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{
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memcpy(jpeg_hdr, jpeg_head, sizeof jpeg_head);
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#ifndef CONEX_CAM
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jpeg_hdr[JPEG_HEIGHT_OFFSET + 0] = height >> 8;
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jpeg_hdr[JPEG_HEIGHT_OFFSET + 1] = height;
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jpeg_hdr[JPEG_HEIGHT_OFFSET + 2] = width >> 8;
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jpeg_hdr[JPEG_HEIGHT_OFFSET + 3] = width;
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jpeg_hdr[JPEG_HEIGHT_OFFSET + 6] = samplesY;
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#endif
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}
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/* set the JPEG quality */
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static void jpeg_set_qual(u8 *jpeg_hdr,
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int quality)
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{
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int i, sc;
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if (quality <= 0)
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sc = 5000;
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else if (quality < 50)
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sc = 5000 / quality;
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else
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sc = 200 - quality * 2;
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for (i = 0; i < 64; i++) {
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jpeg_hdr[JPEG_QT0_OFFSET + i] =
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(jpeg_head[JPEG_QT0_OFFSET + i] * sc + 50) / 100;
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jpeg_hdr[JPEG_QT1_OFFSET + i] =
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(jpeg_head[JPEG_QT1_OFFSET + i] * sc + 50) / 100;
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}
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}
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#endif
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