131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih#ifdef HAVE_CONFIG_H 2c74663799493f2b1e6123c18def94295d0afab7Kenny Root# include <config.h> 3c74663799493f2b1e6123c18def94295d0afab7Kenny Root#endif 4c74663799493f2b1e6123c18def94295d0afab7Kenny Root 5c74663799493f2b1e6123c18def94295d0afab7Kenny Root#include <stdlib.h> /* for malloc() */ 6c74663799493f2b1e6123c18def94295d0afab7Kenny Root#include <string.h> /* for memcpy() */ 7c74663799493f2b1e6123c18def94295d0afab7Kenny Root 8c74663799493f2b1e6123c18def94295d0afab7Kenny Root#include "private/md5.h" 9c74663799493f2b1e6123c18def94295d0afab7Kenny Root#include "share/alloc.h" 1031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih#include "share/endswap.h" 11c74663799493f2b1e6123c18def94295d0afab7Kenny Root 12c74663799493f2b1e6123c18def94295d0afab7Kenny Root/* 13c74663799493f2b1e6123c18def94295d0afab7Kenny Root * This code implements the MD5 message-digest algorithm. 14c74663799493f2b1e6123c18def94295d0afab7Kenny Root * The algorithm is due to Ron Rivest. This code was 15c74663799493f2b1e6123c18def94295d0afab7Kenny Root * written by Colin Plumb in 1993, no copyright is claimed. 16c74663799493f2b1e6123c18def94295d0afab7Kenny Root * This code is in the public domain; do with it what you wish. 17c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 18c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Equivalent code is available from RSA Data Security, Inc. 19c74663799493f2b1e6123c18def94295d0afab7Kenny Root * This code has been tested against that, and is equivalent, 20c74663799493f2b1e6123c18def94295d0afab7Kenny Root * except that you don't need to include two pages of legalese 21c74663799493f2b1e6123c18def94295d0afab7Kenny Root * with every copy. 22c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 23c74663799493f2b1e6123c18def94295d0afab7Kenny Root * To compute the message digest of a chunk of bytes, declare an 24c74663799493f2b1e6123c18def94295d0afab7Kenny Root * MD5Context structure, pass it to MD5Init, call MD5Update as 25c74663799493f2b1e6123c18def94295d0afab7Kenny Root * needed on buffers full of bytes, and then call MD5Final, which 26c74663799493f2b1e6123c18def94295d0afab7Kenny Root * will fill a supplied 16-byte array with the digest. 27c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 28c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Changed so as no longer to depend on Colin Plumb's `usual.h' header 29c74663799493f2b1e6123c18def94295d0afab7Kenny Root * definitions; now uses stuff from dpkg's config.h. 30c74663799493f2b1e6123c18def94295d0afab7Kenny Root * - Ian Jackson <ijackson@nyx.cs.du.edu>. 31c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Still in the public domain. 32c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 33c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Josh Coalson: made some changes to integrate with libFLAC. 34c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Still in the public domain. 35c74663799493f2b1e6123c18def94295d0afab7Kenny Root */ 36c74663799493f2b1e6123c18def94295d0afab7Kenny Root 37c74663799493f2b1e6123c18def94295d0afab7Kenny Root/* The four core functions - F1 is optimized somewhat */ 38c74663799493f2b1e6123c18def94295d0afab7Kenny Root 39c74663799493f2b1e6123c18def94295d0afab7Kenny Root/* #define F1(x, y, z) (x & y | ~x & z) */ 40c74663799493f2b1e6123c18def94295d0afab7Kenny Root#define F1(x, y, z) (z ^ (x & (y ^ z))) 41c74663799493f2b1e6123c18def94295d0afab7Kenny Root#define F2(x, y, z) F1(z, x, y) 42c74663799493f2b1e6123c18def94295d0afab7Kenny Root#define F3(x, y, z) (x ^ y ^ z) 43c74663799493f2b1e6123c18def94295d0afab7Kenny Root#define F4(x, y, z) (y ^ (x | ~z)) 44c74663799493f2b1e6123c18def94295d0afab7Kenny Root 45c74663799493f2b1e6123c18def94295d0afab7Kenny Root/* This is the central step in the MD5 algorithm. */ 46c74663799493f2b1e6123c18def94295d0afab7Kenny Root#define MD5STEP(f,w,x,y,z,in,s) \ 47c74663799493f2b1e6123c18def94295d0afab7Kenny Root (w += f(x,y,z) + in, w = (w<<s | w>>(32-s)) + x) 48c74663799493f2b1e6123c18def94295d0afab7Kenny Root 49c74663799493f2b1e6123c18def94295d0afab7Kenny Root/* 50c74663799493f2b1e6123c18def94295d0afab7Kenny Root * The core of the MD5 algorithm, this alters an existing MD5 hash to 51c74663799493f2b1e6123c18def94295d0afab7Kenny Root * reflect the addition of 16 longwords of new data. MD5Update blocks 52c74663799493f2b1e6123c18def94295d0afab7Kenny Root * the data and converts bytes into longwords for this routine. 53c74663799493f2b1e6123c18def94295d0afab7Kenny Root */ 54c74663799493f2b1e6123c18def94295d0afab7Kenny Rootstatic void FLAC__MD5Transform(FLAC__uint32 buf[4], FLAC__uint32 const in[16]) 55c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 56c74663799493f2b1e6123c18def94295d0afab7Kenny Root register FLAC__uint32 a, b, c, d; 57c74663799493f2b1e6123c18def94295d0afab7Kenny Root 58c74663799493f2b1e6123c18def94295d0afab7Kenny Root a = buf[0]; 59c74663799493f2b1e6123c18def94295d0afab7Kenny Root b = buf[1]; 60c74663799493f2b1e6123c18def94295d0afab7Kenny Root c = buf[2]; 61c74663799493f2b1e6123c18def94295d0afab7Kenny Root d = buf[3]; 62c74663799493f2b1e6123c18def94295d0afab7Kenny Root 63c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); 64c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); 65c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); 66c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); 67c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); 68c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); 69c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); 70c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); 71c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); 72c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); 73c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); 74c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); 75c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); 76c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); 77c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); 78c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); 79c74663799493f2b1e6123c18def94295d0afab7Kenny Root 80c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); 81c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); 82c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); 83c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); 84c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); 85c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); 86c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); 87c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); 88c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); 89c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); 90c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); 91c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); 92c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); 93c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); 94c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); 95c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); 96c74663799493f2b1e6123c18def94295d0afab7Kenny Root 97c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); 98c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); 99c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); 100c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); 101c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); 102c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); 103c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); 104c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); 105c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); 106c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); 107c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); 108c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); 109c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); 110c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); 111c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); 112c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); 113c74663799493f2b1e6123c18def94295d0afab7Kenny Root 114c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); 115c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); 116c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); 117c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); 118c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); 119c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); 120c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); 121c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); 122c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); 123c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); 124c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); 125c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); 126c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); 127c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); 128c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); 129c74663799493f2b1e6123c18def94295d0afab7Kenny Root MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); 130c74663799493f2b1e6123c18def94295d0afab7Kenny Root 131c74663799493f2b1e6123c18def94295d0afab7Kenny Root buf[0] += a; 132c74663799493f2b1e6123c18def94295d0afab7Kenny Root buf[1] += b; 133c74663799493f2b1e6123c18def94295d0afab7Kenny Root buf[2] += c; 134c74663799493f2b1e6123c18def94295d0afab7Kenny Root buf[3] += d; 135c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 136c74663799493f2b1e6123c18def94295d0afab7Kenny Root 137c74663799493f2b1e6123c18def94295d0afab7Kenny Root#if WORDS_BIGENDIAN 138c74663799493f2b1e6123c18def94295d0afab7Kenny Root//@@@@@@ OPT: use bswap/intrinsics 139c74663799493f2b1e6123c18def94295d0afab7Kenny Rootstatic void byteSwap(FLAC__uint32 *buf, unsigned words) 140c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 141c74663799493f2b1e6123c18def94295d0afab7Kenny Root register FLAC__uint32 x; 142c74663799493f2b1e6123c18def94295d0afab7Kenny Root do { 14331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih x = *buf; 144c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); 145c74663799493f2b1e6123c18def94295d0afab7Kenny Root *buf++ = (x >> 16) | (x << 16); 146c74663799493f2b1e6123c18def94295d0afab7Kenny Root } while (--words); 147c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 148c74663799493f2b1e6123c18def94295d0afab7Kenny Rootstatic void byteSwapX16(FLAC__uint32 *buf) 149c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 150c74663799493f2b1e6123c18def94295d0afab7Kenny Root register FLAC__uint32 x; 151c74663799493f2b1e6123c18def94295d0afab7Kenny Root 152c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 153c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 154c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 155c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 156c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 157c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 158c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 159c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 160c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 161c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 162c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 163c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 164c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 165c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 166c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf++ = (x >> 16) | (x << 16); 167c74663799493f2b1e6123c18def94295d0afab7Kenny Root x = *buf; x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); *buf = (x >> 16) | (x << 16); 168c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 169c74663799493f2b1e6123c18def94295d0afab7Kenny Root#else 170c74663799493f2b1e6123c18def94295d0afab7Kenny Root#define byteSwap(buf, words) 171c74663799493f2b1e6123c18def94295d0afab7Kenny Root#define byteSwapX16(buf) 172c74663799493f2b1e6123c18def94295d0afab7Kenny Root#endif 173c74663799493f2b1e6123c18def94295d0afab7Kenny Root 174c74663799493f2b1e6123c18def94295d0afab7Kenny Root/* 175c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Update context to reflect the concatenation of another buffer full 176c74663799493f2b1e6123c18def94295d0afab7Kenny Root * of bytes. 177c74663799493f2b1e6123c18def94295d0afab7Kenny Root */ 178c74663799493f2b1e6123c18def94295d0afab7Kenny Rootstatic void FLAC__MD5Update(FLAC__MD5Context *ctx, FLAC__byte const *buf, unsigned len) 179c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 180c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__uint32 t; 181c74663799493f2b1e6123c18def94295d0afab7Kenny Root 182c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* Update byte count */ 183c74663799493f2b1e6123c18def94295d0afab7Kenny Root 184c74663799493f2b1e6123c18def94295d0afab7Kenny Root t = ctx->bytes[0]; 185c74663799493f2b1e6123c18def94295d0afab7Kenny Root if ((ctx->bytes[0] = t + len) < t) 186c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->bytes[1]++; /* Carry from low to high */ 187c74663799493f2b1e6123c18def94295d0afab7Kenny Root 188c74663799493f2b1e6123c18def94295d0afab7Kenny Root t = 64 - (t & 0x3f); /* Space available in ctx->in (at least 1) */ 189c74663799493f2b1e6123c18def94295d0afab7Kenny Root if (t > len) { 190c74663799493f2b1e6123c18def94295d0afab7Kenny Root memcpy((FLAC__byte *)ctx->in + 64 - t, buf, len); 191c74663799493f2b1e6123c18def94295d0afab7Kenny Root return; 192c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 193c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* First chunk is an odd size */ 194c74663799493f2b1e6123c18def94295d0afab7Kenny Root memcpy((FLAC__byte *)ctx->in + 64 - t, buf, t); 195c74663799493f2b1e6123c18def94295d0afab7Kenny Root byteSwapX16(ctx->in); 196c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__MD5Transform(ctx->buf, ctx->in); 197c74663799493f2b1e6123c18def94295d0afab7Kenny Root buf += t; 198c74663799493f2b1e6123c18def94295d0afab7Kenny Root len -= t; 199c74663799493f2b1e6123c18def94295d0afab7Kenny Root 200c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* Process data in 64-byte chunks */ 201c74663799493f2b1e6123c18def94295d0afab7Kenny Root while (len >= 64) { 202c74663799493f2b1e6123c18def94295d0afab7Kenny Root memcpy(ctx->in, buf, 64); 203c74663799493f2b1e6123c18def94295d0afab7Kenny Root byteSwapX16(ctx->in); 204c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__MD5Transform(ctx->buf, ctx->in); 205c74663799493f2b1e6123c18def94295d0afab7Kenny Root buf += 64; 206c74663799493f2b1e6123c18def94295d0afab7Kenny Root len -= 64; 207c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 208c74663799493f2b1e6123c18def94295d0afab7Kenny Root 209c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* Handle any remaining bytes of data. */ 210c74663799493f2b1e6123c18def94295d0afab7Kenny Root memcpy(ctx->in, buf, len); 211c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 212c74663799493f2b1e6123c18def94295d0afab7Kenny Root 213c74663799493f2b1e6123c18def94295d0afab7Kenny Root/* 214c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious 215c74663799493f2b1e6123c18def94295d0afab7Kenny Root * initialization constants. 216c74663799493f2b1e6123c18def94295d0afab7Kenny Root */ 217c74663799493f2b1e6123c18def94295d0afab7Kenny Rootvoid FLAC__MD5Init(FLAC__MD5Context *ctx) 218c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 219c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->buf[0] = 0x67452301; 220c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->buf[1] = 0xefcdab89; 221c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->buf[2] = 0x98badcfe; 222c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->buf[3] = 0x10325476; 223c74663799493f2b1e6123c18def94295d0afab7Kenny Root 224c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->bytes[0] = 0; 225c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->bytes[1] = 0; 226c74663799493f2b1e6123c18def94295d0afab7Kenny Root 22731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih ctx->internal_buf.p8= 0; 228c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->capacity = 0; 229c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 230c74663799493f2b1e6123c18def94295d0afab7Kenny Root 231c74663799493f2b1e6123c18def94295d0afab7Kenny Root/* 232c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Final wrapup - pad to 64-byte boundary with the bit pattern 233c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 1 0* (64-bit count of bits processed, MSB-first) 234c74663799493f2b1e6123c18def94295d0afab7Kenny Root */ 235c74663799493f2b1e6123c18def94295d0afab7Kenny Rootvoid FLAC__MD5Final(FLAC__byte digest[16], FLAC__MD5Context *ctx) 236c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 237c74663799493f2b1e6123c18def94295d0afab7Kenny Root int count = ctx->bytes[0] & 0x3f; /* Number of bytes in ctx->in */ 238c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__byte *p = (FLAC__byte *)ctx->in + count; 239c74663799493f2b1e6123c18def94295d0afab7Kenny Root 240c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* Set the first char of padding to 0x80. There is always room. */ 241c74663799493f2b1e6123c18def94295d0afab7Kenny Root *p++ = 0x80; 242c74663799493f2b1e6123c18def94295d0afab7Kenny Root 243c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* Bytes of padding needed to make 56 bytes (-8..55) */ 244c74663799493f2b1e6123c18def94295d0afab7Kenny Root count = 56 - 1 - count; 245c74663799493f2b1e6123c18def94295d0afab7Kenny Root 246c74663799493f2b1e6123c18def94295d0afab7Kenny Root if (count < 0) { /* Padding forces an extra block */ 247c74663799493f2b1e6123c18def94295d0afab7Kenny Root memset(p, 0, count + 8); 248c74663799493f2b1e6123c18def94295d0afab7Kenny Root byteSwapX16(ctx->in); 249c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__MD5Transform(ctx->buf, ctx->in); 250c74663799493f2b1e6123c18def94295d0afab7Kenny Root p = (FLAC__byte *)ctx->in; 251c74663799493f2b1e6123c18def94295d0afab7Kenny Root count = 56; 252c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 253c74663799493f2b1e6123c18def94295d0afab7Kenny Root memset(p, 0, count); 254c74663799493f2b1e6123c18def94295d0afab7Kenny Root byteSwap(ctx->in, 14); 255c74663799493f2b1e6123c18def94295d0afab7Kenny Root 256c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* Append length in bits and transform */ 257c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->in[14] = ctx->bytes[0] << 3; 258c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29; 259c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__MD5Transform(ctx->buf, ctx->in); 260c74663799493f2b1e6123c18def94295d0afab7Kenny Root 261c74663799493f2b1e6123c18def94295d0afab7Kenny Root byteSwap(ctx->buf, 4); 262c74663799493f2b1e6123c18def94295d0afab7Kenny Root memcpy(digest, ctx->buf, 16); 26331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih if (0 != ctx->internal_buf.p8) { 26431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih free(ctx->internal_buf.p8); 26531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih ctx->internal_buf.p8= 0; 266c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->capacity = 0; 267c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 26831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */ 269c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 270c74663799493f2b1e6123c18def94295d0afab7Kenny Root 271c74663799493f2b1e6123c18def94295d0afab7Kenny Root/* 272c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Convert the incoming audio signal to a byte stream 273c74663799493f2b1e6123c18def94295d0afab7Kenny Root */ 27431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shihstatic void format_input_(FLAC__multibyte *mbuf, const FLAC__int32 * const signal[], unsigned channels, unsigned samples, unsigned bytes_per_sample) 275c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 27631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih FLAC__byte *buf_ = mbuf->p8; 27731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih FLAC__int16 *buf16 = mbuf->p16; 27831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih FLAC__int32 *buf32 = mbuf->p32; 27931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih FLAC__int32 a_word; 280c74663799493f2b1e6123c18def94295d0afab7Kenny Root unsigned channel, sample; 281c74663799493f2b1e6123c18def94295d0afab7Kenny Root 28231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih /* Storage in the output buffer, buf, is little endian. */ 28331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 28431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih#define BYTES_CHANNEL_SELECTOR(bytes, channels) (bytes * 100 + channels) 28531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 28631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih /* First do the most commonly used combinations. */ 28731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih switch (BYTES_CHANNEL_SELECTOR (bytes_per_sample, channels)) { 28831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih /* One byte per sample. */ 28931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (1, 1)): 29031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) 29131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[0][sample]; 29231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 29331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 29431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (1, 2)): 29531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 29631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[0][sample]; 29731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[1][sample]; 298c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 29931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 30031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 30131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (1, 4)): 30231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 30331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[0][sample]; 30431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[1][sample]; 30531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[2][sample]; 30631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[3][sample]; 30731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih } 30831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 30931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 31031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (1, 6)): 31131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 31231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[0][sample]; 31331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[1][sample]; 31431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[2][sample]; 31531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[3][sample]; 31631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[4][sample]; 31731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[5][sample]; 31831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih } 31931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 32031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 32131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (1, 8)): 32231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 32331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[0][sample]; 32431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[1][sample]; 32531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[2][sample]; 32631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[3][sample]; 32731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[4][sample]; 32831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[5][sample]; 32931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[6][sample]; 33031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[7][sample]; 33131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih } 33231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 33331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 33431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih /* Two bytes per sample. */ 33531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (2, 1)): 33631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) 33731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[0][sample]); 33831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 33931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 34031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (2, 2)): 34131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 34231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[0][sample]); 34331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[1][sample]); 34431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih } 34531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 34631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 34731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (2, 4)): 34831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 34931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[0][sample]); 35031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[1][sample]); 35131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[2][sample]); 35231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[3][sample]); 35331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih } 35431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 35531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 35631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (2, 6)): 35731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 35831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[0][sample]); 35931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[1][sample]); 36031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[2][sample]); 36131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[3][sample]); 36231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[4][sample]); 36331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[5][sample]); 36431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih } 36531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 36631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 36731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (2, 8)): 36831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 36931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[0][sample]); 37031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[1][sample]); 37131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[2][sample]); 37231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[3][sample]); 37331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[4][sample]); 37431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[5][sample]); 37531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[6][sample]); 37631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[7][sample]); 37731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih } 37831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 37931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 38031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih /* Three bytes per sample. */ 38131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (3, 1)): 38231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 383c74663799493f2b1e6123c18def94295d0afab7Kenny Root a_word = signal[0][sample]; 384c74663799493f2b1e6123c18def94295d0afab7Kenny Root *buf_++ = (FLAC__byte)a_word; a_word >>= 8; 38531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = (FLAC__byte)a_word; a_word >>= 8; 386c74663799493f2b1e6123c18def94295d0afab7Kenny Root *buf_++ = (FLAC__byte)a_word; 387c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 38831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 38931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 39031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (3, 2)): 39131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 392c74663799493f2b1e6123c18def94295d0afab7Kenny Root a_word = signal[0][sample]; 393c74663799493f2b1e6123c18def94295d0afab7Kenny Root *buf_++ = (FLAC__byte)a_word; a_word >>= 8; 394c74663799493f2b1e6123c18def94295d0afab7Kenny Root *buf_++ = (FLAC__byte)a_word; a_word >>= 8; 395c74663799493f2b1e6123c18def94295d0afab7Kenny Root *buf_++ = (FLAC__byte)a_word; 396c74663799493f2b1e6123c18def94295d0afab7Kenny Root a_word = signal[1][sample]; 397c74663799493f2b1e6123c18def94295d0afab7Kenny Root *buf_++ = (FLAC__byte)a_word; a_word >>= 8; 398c74663799493f2b1e6123c18def94295d0afab7Kenny Root *buf_++ = (FLAC__byte)a_word; a_word >>= 8; 399c74663799493f2b1e6123c18def94295d0afab7Kenny Root *buf_++ = (FLAC__byte)a_word; 400c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 40131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 40231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 40331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih /* Four bytes per sample. */ 40431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (4, 1)): 40531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) 40631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[0][sample]); 40731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 40831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 40931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (4, 2)): 41031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 41131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[0][sample]); 41231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[1][sample]); 413c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 41431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 41531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 41631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (4, 4)): 41731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 41831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[0][sample]); 41931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[1][sample]); 42031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[2][sample]); 42131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[3][sample]); 422c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 42331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 42431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 42531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (4, 6)): 42631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 42731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[0][sample]); 42831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[1][sample]); 42931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[2][sample]); 43031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[3][sample]); 43131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[4][sample]); 43231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[5][sample]); 433c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 43431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 43531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 43631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case (BYTES_CHANNEL_SELECTOR (4, 8)): 43731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) { 43831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[0][sample]); 43931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[1][sample]); 44031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[2][sample]); 44131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[3][sample]); 44231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[4][sample]); 44331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[5][sample]); 44431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[6][sample]); 44531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[7][sample]); 446c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 44731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 44831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 44931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih default: 45031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih break; 45131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih } 45231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 45331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih /* General version. */ 45431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih switch (bytes_per_sample) { 45531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case 1: 45631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) 45731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (channel = 0; channel < channels; channel++) 45831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = signal[channel][sample]; 45931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 46031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 46131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case 2: 46231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) 46331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (channel = 0; channel < channels; channel++) 46431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf16++ = H2LE_16(signal[channel][sample]); 46531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 46631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 46731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case 3: 46831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) 46931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (channel = 0; channel < channels; channel++) { 470c74663799493f2b1e6123c18def94295d0afab7Kenny Root a_word = signal[channel][sample]; 47131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = (FLAC__byte)a_word; a_word >>= 8; 47231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf_++ = (FLAC__byte)a_word; a_word >>= 8; 473c74663799493f2b1e6123c18def94295d0afab7Kenny Root *buf_++ = (FLAC__byte)a_word; 474c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 47531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 47631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 47731e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih case 4: 47831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (sample = 0; sample < samples; sample++) 47931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih for (channel = 0; channel < channels; channel++) 48031e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih *buf32++ = H2LE_32(signal[channel][sample]); 48131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih return; 48231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih 48331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih default: 48431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih break; 485c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 486c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 487c74663799493f2b1e6123c18def94295d0afab7Kenny Root 488c74663799493f2b1e6123c18def94295d0afab7Kenny Root/* 489c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Convert the incoming audio signal to a byte stream and FLAC__MD5Update it. 490c74663799493f2b1e6123c18def94295d0afab7Kenny Root */ 491c74663799493f2b1e6123c18def94295d0afab7Kenny RootFLAC__bool FLAC__MD5Accumulate(FLAC__MD5Context *ctx, const FLAC__int32 * const signal[], unsigned channels, unsigned samples, unsigned bytes_per_sample) 492c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 493c74663799493f2b1e6123c18def94295d0afab7Kenny Root const size_t bytes_needed = (size_t)channels * (size_t)samples * (size_t)bytes_per_sample; 494c74663799493f2b1e6123c18def94295d0afab7Kenny Root 495c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* overflow check */ 49631e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih if ((size_t)channels > SIZE_MAX / (size_t)bytes_per_sample) 497c74663799493f2b1e6123c18def94295d0afab7Kenny Root return false; 49831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih if ((size_t)channels * (size_t)bytes_per_sample > SIZE_MAX / (size_t)samples) 499c74663799493f2b1e6123c18def94295d0afab7Kenny Root return false; 500c74663799493f2b1e6123c18def94295d0afab7Kenny Root 50131e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih if (ctx->capacity < bytes_needed) { 50231e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih FLAC__byte *tmp = realloc(ctx->internal_buf.p8, bytes_needed); 50331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih if (0 == tmp) { 50431e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih free(ctx->internal_buf.p8); 50531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih if (0 == (ctx->internal_buf.p8= safe_malloc_(bytes_needed))) 506c74663799493f2b1e6123c18def94295d0afab7Kenny Root return false; 507c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 50831e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih else 50931e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih ctx->internal_buf.p8= tmp; 510c74663799493f2b1e6123c18def94295d0afab7Kenny Root ctx->capacity = bytes_needed; 511c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 512c74663799493f2b1e6123c18def94295d0afab7Kenny Root 51331e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih format_input_(&ctx->internal_buf, signal, channels, samples, bytes_per_sample); 514c74663799493f2b1e6123c18def94295d0afab7Kenny Root 51531e4f3166a91a2ebb34f643787122a638d9f1471Robert Shih FLAC__MD5Update(ctx, ctx->internal_buf.p8, bytes_needed); 516c74663799493f2b1e6123c18def94295d0afab7Kenny Root 517c74663799493f2b1e6123c18def94295d0afab7Kenny Root return true; 518c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 519