嵌入式实习-day8、9-智能家居系统相关代码

#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <errno.h> #include <fcntl.h> #include <jpeglib.h> #define ROUND_0_255(v) ((v) < 0 ? 0 : ((v) > 255 ? 255 : (v))) typedef struct { struct jpeg_destination_mgr pub; JOCTET *buffer; unsigned char *outbuffer; int outbuffer_size; unsigned char *outbuffer_cursor; int *written; } jpeg_dest_mgr, *jpeg_dest_mgr_ptr; struct jpeg_mgr_info { unsigned long written; JSAMPROW row_pointer[1]; struct jpeg_error_mgr jerr; struct jpeg_compress_struct cinfo; }; static struct jpeg_mgr_info jinfo; static short radj[] = { -175, -174, -172, -171, -169, -168, -167, -165, -164, -163, -161, -160, -159, -157, -156, -154, -153, -152, -150, -149, -148, -146, -145, -143, -142, -141, -139, -138, -137, -135, -134, -132, -131, -130, -128, -127, -126, -124, -123, -121, -120, -119, -117, -116, -115, -113, -112, -111, -109, -108, -106, -105, -104, -102, -101, -100, -98, -97, -95, -94, -93, -91, -90, -89, -87, -86, -84, -83, -82, -80, -79, -78, -76, -75, -74, -72, -71, -69, -68, -67, -65, -64, -63, -61, -60, -58, -57, -56, -54, -53, -52, -50, -49, -47, -46, -45, -43, -42, -41, -39, -38, -37, -35, -34, -32, -31, -30, -28, -27, -26, -24, -23, -21, -20, -19, -17, -16, -15, -13, -12, -10, -9, -8, -6, -5, -4, -2, -1, 0, 1, 2, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 17, 19, 20, 21, 23, 24, 26, 27, 28, 30, 31, 32, 34, 35, 37, 38, 39, 41, 42, 43, 45, 46, 47, 49, 50, 52, 53, 54, 56, 57, 58, 60, 61, 63, 64, 65, 67, 68, 69, 71, 72, 74, 75, 76, 78, 79, 80, 82, 83, 84, 86, 87, 89, 90, 91, 93, 94, 95, 97, 98, 100, 101, 102, 104, 105, 106, 108, 109, 111, 112, 113, 115, 116, 117, 119, 120, 121, 123, 124, 126, 127, 128, 130, 131, 132, 134, 135, 137, 138, 139, 141, 142, 143, 145, 146, 148, 149, 150, 152, 153, 154, 156, 157, 159, 160, 161, 163, 164, 165, 167, 168, 169, 171, 172, 174, }; static short gadj1[] = { -89, -88, -87, -87, -86, -85, -85, -84, -83, -83, -82, -81, -80, -80, -79, -78, -78, -77, -76, -76, -75, -74, -73, -73, -72, -71, -71, -70, -69, -69, -68, -67, -67, -66, -65, -64, -64, -63, -62, -62, -61, -60, -60, -59, -58, -57, -57, -56, -55, -55, -54, -53, -53, -52, -51, -50, -50, -49, -48, -48, -47, -46, -46, -45, -44, -43, -43, -42, -41, -41, -40, -39, -39, -38, -37, -36, -36, -35, -34, -34, -33, -32, -32, -31, -30, -30, -29, -28, -27, -27, -26, -25, -25, -24, -23, -23, -22, -21, -20, -20, -19, -18, -18, -17, -16, -16, -15, -14, -13, -13, -12, -11, -11, -10, -9, -9, -8, -7, -6, -6, -5, -4, -4, -3, -2, -2, -1, 0, 0, 0, 1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 9, 9, 10, 11, 11, 12, 13, 13, 14, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 22, 23, 23, 24, 25, 25, 26, 27, 27, 28, 29, 30, 30, 31, 32, 32, 33, 34, 34, 35, 36, 36, 37, 38, 39, 39, 40, 41, 41, 42, 43, 43, 44, 45, 46, 46, 47, 48, 48, 49, 50, 50, 51, 52, 53, 53, 54, 55, 55, 56, 57, 57, 58, 59, 60, 60, 61, 62, 62, 63, 64, 64, 65, 66, 67, 67, 68, 69, 69, 70, 71, 71, 72, 73, 73, 74, 75, 76, 76, 77, 78, 78, 79, 80, 80, 81, 82, 83, 83, 84, 85, 85, 86, 87, 87, 88, }; static short gadj2[] = { -43, -42, -42, -42, -41, -41, -41, -40, -40, -40, -39, -39, -39, -38, -38, -38, -37, -37, -37, -36, -36, -36, -35, -35, -35, -34, -34, -34, -33, -33, -33, -32, -32, -32, -31, -31, -31, -30, -30, -30, -29, -29, -29, -28, -28, -28, -27, -27, -27, -26, -26, -25, -25, -25, -24, -24, -24, -23, -23, -23, -22, -22, -22, -21, -21, -21, -20, -20, -20, -19, -19, -19, -18, -18, -18, -17, -17, -17, -16, -16, -16, -15, -15, -15, -14, -14, -14, -13, -13, -13, -12, -12, -12, -11, -11, -11, -10, -10, -10, -9, -9, -9, -8, -8, -8, -7, -7, -7, -6, -6, -6, -5, -5, -5, -4, -4, -4, -3, -3, -3, -2, -2, -2, -1, -1, -1, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 14, 15, 15, 15, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 20, 20, 20, 21, 21, 21, 22, 22, 22, 23, 23, 23, 24, 24, 24, 25, 25, 25, 26, 26, 27, 27, 27, 28, 28, 28, 29, 29, 29, 30, 30, 30, 31, 31, 31, 32, 32, 32, 33, 33, 33, 34, 34, 34, 35, 35, 35, 36, 36, 36, 37, 37, 37, 38, 38, 38, 39, 39, 39, 40, 40, 40, 41, 41, 41, 42, 42, 42, }; static short badj[] = { -221, -220, -218, -216, -214, -213, -211, -209, -207, -206, -204, -202, -200, -199, -197, -195, -194, -192, -190, -188, -187, -185, -183, -181, -180, -178, -176, -174, -173, -171, -169, -168, -166, -164, -162, -161, -159, -157, -155, -154, -152, -150, -148, -147, -145, -143, -142, -140, -138, -136, -135, -133, -131, -129, -128, -126, -124, -123, -121, -119, -117, -116, -114, -112, -110, -109, -107, -105, -103, -102, -100, -98, -97, -95, -93, -91, -90, -88, -86, -84, -83, -81, -79, -77, -76, -74, -72, -71, -69, -67, -65, -64, -62, -60, -58, -57, -55, -53, -51, -50, -48, -46, -45, -43, -41, -39, -38, -36, -34, -32, -31, -29, -27, -25, -24, -22, -20, -19, -17, -15, -13, -12, -10, -8, -6, -5, -3, -1, 0, 1, 3, 5, 6, 8, 10, 12, 13, 15, 17, 19, 20, 22, 24, 25, 27, 29, 31, 32, 34, 36, 38, 39, 41, 43, 45, 46, 48, 50, 51, 53, 55, 57, 58, 60, 62, 64, 65, 67, 69, 71, 72, 74, 76, 77, 79, 81, 83, 84, 86, 88, 90, 91, 93, 95, 97, 98, 100, 102, 103, 105, 107, 109, 110, 112, 114, 116, 117, 119, 121, 123, 124, 126, 128, 129, 131, 133, 135, 136, 138, 140, 142, 143, 145, 147, 148, 150, 152, 154, 155, 157, 159, 161, 162, 164, 166, 168, 169, 171, 173, 174, 176, 178, 180, 181, 183, 185, 187, 188, 190, 192, 194, 195, 197, 199, 200, 202, 204, 206, 207, 209, 211, 213, 214, 216, 218, 220, }; void convert_yuv_to_rgb(void *yuv, void *rgb, unsigned int width, unsigned int height, unsigned int bps) { unsigned int i; int y1, y2, u, v; unsigned char *src = yuv; unsigned char *dst = rgb; unsigned int count = width * height / 2; switch (bps) { case 24: for (i = 0; i < count; i++) { y1 = *src++; u = *src++; y2 = *src++; v = *src++; *dst++ = ROUND_0_255(y1 + radj[v]); *dst++ = ROUND_0_255(y1 - gadj1[u] - gadj2[v]); *dst++ = ROUND_0_255(y1 + badj[u]); *dst++ = ROUND_0_255(y2 + radj[v]); *dst++ = ROUND_0_255(y2 - gadj1[u] - gadj2[v]); *dst++ = ROUND_0_255(y2 + badj[u]); } break; } } void convert_rgb_to_jpg_init(void) { memset(&jinfo, 0, sizeof(struct jpeg_mgr_info)); jinfo.cinfo.err = jpeg_std_error(&jinfo.jerr); jpeg_create_compress(&jinfo.cinfo); } int convert_rgb_to_jpg_work(void *rgb, void *jpeg, unsigned int width, unsigned int height, unsigned int bpp, int quality) { jinfo.written = width * height * bpp / 3; jpeg_mem_dest(&jinfo.cinfo, (unsigned char **)&jpeg, &jinfo.written); jinfo.cinfo.image_width