/* * video_out_pgm.c * Copyright (C) 2000-2003 Michel Lespinasse * Copyright (C) 2003 Regis Duchesne * Copyright (C) 1999-2000 Aaron Holtzman * MD5 code derived from linux kernel GPL implementation * * This file is part of mpeg2dec, a free MPEG-2 video stream decoder. * See http://libmpeg2.sourceforge.net/ for updates. * * mpeg2dec 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. * * mpeg2dec 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 */ #include "config.h" #include #include #include #include #include "video_out.h" typedef struct pgm_instance_s { vo_instance_t vo; int framenum; int width; int height; int chroma_width; int chroma_height; char header[1024]; void (* writer) (struct pgm_instance_s *, uint8_t *, size_t); FILE * file; uint32_t md5_hash[4]; uint32_t md5_block[16]; uint32_t md5_bytes; } pgm_instance_t; static void file_writer (pgm_instance_t * instance, uint8_t * ptr, size_t size) { fwrite (ptr, size, 1, instance->file); } static void internal_draw_frame (pgm_instance_t * instance, uint8_t * const * buf) { static uint8_t black[16384] = { 0 }; int i; instance->writer (instance, (uint8_t *)instance->header, strlen (instance->header)); for (i = 0; i < instance->height; i++) { instance->writer (instance, buf[0] + i * instance->width, instance->width); instance->writer (instance, black, 2 * instance->chroma_width - instance->width); } for (i = 0; i < instance->chroma_height; i++) { instance->writer (instance, buf[1] + i * instance->chroma_width, instance->chroma_width); instance->writer (instance, buf[2] + i * instance->chroma_width, instance->chroma_width); } } static void pgm_draw_frame (vo_instance_t * _instance, uint8_t * const * buf, void * id) { pgm_instance_t * instance = (pgm_instance_t *) _instance; char filename[128]; sprintf (filename, "%d.pgm", instance->framenum++); instance->file = fopen (filename, "wb"); if (instance->file == NULL) return; internal_draw_frame (instance, buf); fclose (instance->file); } static int pgm_setup (vo_instance_t * _instance, unsigned int width, unsigned int height, unsigned int chroma_width, unsigned int chroma_height, vo_setup_result_t * result) { pgm_instance_t * instance; instance = (pgm_instance_t *) _instance; /* * Layout of the Y, U, and V buffers in our pgm image * * YY YY YY * 420: YY 422: YY 444: YY * UV UV UUVV * UV UUVV */ if (width > 2 * chroma_width) return 1; instance->width = width; instance->height = height; instance->chroma_width = chroma_width; instance->chroma_height = chroma_height; sprintf (instance->header, "P5\n%d %d\n255\n", 2 * chroma_width, height + chroma_height); result->convert = NULL; return 0; } static vo_instance_t * internal_open (void draw (vo_instance_t *, uint8_t * const *, void *), void writer (pgm_instance_t *, uint8_t *, size_t)) { pgm_instance_t * instance; instance = (pgm_instance_t *) malloc (sizeof (pgm_instance_t)); if (instance == NULL) return NULL; instance->vo.setup = pgm_setup; instance->vo.setup_fbuf = NULL; instance->vo.set_fbuf = NULL; instance->vo.start_fbuf = NULL; instance->vo.draw = draw; instance->vo.discard = NULL; instance->vo.close = (void (*) (vo_instance_t *)) free; instance->framenum = 0; instance->writer = writer; instance->file = stdout; return (vo_instance_t *) instance; } vo_instance_t * vo_pgm_open (void) { return internal_open (pgm_draw_frame, file_writer); } static void pgmpipe_draw_frame (vo_instance_t * _instance, uint8_t * const * buf, void * id) { pgm_instance_t * instance = (pgm_instance_t *) _instance; internal_draw_frame (instance, buf); } vo_instance_t * vo_pgmpipe_open (void) { return internal_open (pgmpipe_draw_frame, file_writer); } #define F1(x,y,z) (z ^ (x & (y ^ z))) #define F2(x,y,z) F1 (z, x, y) #define F3(x,y,z) (x ^ y ^ z) #define F4(x,y,z) (y ^ (x | ~z)) #define MD5STEP(f,w,x,y,z,in,s) do { \ w += f (x, y, z) + in; w = ((w << s) | (w >> (32 - s))) + x; \ } while (0) static void md5_transform (uint32_t * hash, uint32_t const * in) { uint32_t a, b, c, d; a = hash[0]; b = hash[1]; c = hash[2]; d = hash[3]; MD5STEP (F1, a, b, c, d, in[0] + 0xd76aa478, 7); MD5STEP (F1, d, a, b, c, in[1] + 0xe8c7b756, 12); MD5STEP (F1, c, d, a, b, in[2] + 0x242070db, 17); MD5STEP (F1, b, c, d, a, in[3] + 0xc1bdceee, 22); MD5STEP (F1, a, b, c, d, in[4] + 0xf57c0faf, 7); MD5STEP (F1, d, a, b, c, in[5] + 0x4787c62a, 12); MD5STEP (F1, c, d, a, b, in[6] + 0xa8304613, 17); MD5STEP (F1, b, c, d, a, in[7] + 0xfd469501, 22); MD5STEP (F1, a, b, c, d, in[8] + 0x698098d8, 7); MD5STEP (F1, d, a, b, c, in[9] + 0x8b44f7af, 12); MD5STEP (F1, c, d, a, b, in[10] + 0xffff5bb1, 17); MD5STEP (F1, b, c, d, a, in[11] + 0x895cd7be, 22); MD5STEP (F1, a, b, c, d, in[12] + 0x6b901122, 7); MD5STEP (F1, d, a, b, c, in[13] + 0xfd987193, 12); MD5STEP (F1, c, d, a, b, in[14] + 0xa679438e, 17); MD5STEP (F1, b, c, d, a, in[15] + 0x49b40821, 22); MD5STEP (F2, a, b, c, d, in[1] + 0xf61e2562, 5); MD5STEP (F2, d, a, b, c, in[6] + 0xc040b340, 9); MD5STEP (F2, c, d, a, b, in[11] + 0x265e5a51, 14); MD5STEP (F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); MD5STEP (F2, a, b, c, d, in[5] + 0xd62f105d, 5); MD5STEP (F2, d, a, b, c, in[10] + 0x02441453, 9); MD5STEP (F2, c, d, a, b, in[15] + 0xd8a1e681, 14); MD5STEP (F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); MD5STEP (F2, a, b, c, d, in[9] + 0x21e1cde6, 5); MD5STEP (F2, d, a, b, c, in[14] + 0xc33707d6, 9); MD5STEP (F2, c, d, a, b, in[3] + 0xf4d50d87, 14); MD5STEP (F2, b, c, d, a, in[8] + 0x455a14ed, 20); MD5STEP (F2, a, b, c, d, in[13] + 0xa9e3e905, 5); MD5STEP (F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); MD5STEP (F2, c, d, a, b, in[7] + 0x676f02d9, 14); MD5STEP (F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); MD5STEP (F3, a, b, c, d, in[5] + 0xfffa3942, 4); MD5STEP (F3, d, a, b, c, in[8] + 0x8771f681, 11); MD5STEP (F3, c, d, a, b, in[11] + 0x6d9d6122, 16); MD5STEP (F3, b, c, d, a, in[14] + 0xfde5380c, 23); MD5STEP (F3, a, b, c, d, in[1] + 0xa4beea44, 4); MD5STEP (F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); MD5STEP (F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); MD5STEP (F3, b, c, d, a, in[10] + 0xbebfbc70, 23); MD5STEP (F3, a, b, c, d, in[13] + 0x289b7ec6, 4); MD5STEP (F3, d, a, b, c, in[0] + 0xeaa127fa, 11); MD5STEP (F3, c, d, a, b, in[3] + 0xd4ef3085, 16); MD5STEP (F3, b, c, d, a, in[6] + 0x04881d05, 23); MD5STEP (F3, a, b, c, d, in[9] + 0xd9d4d039, 4); MD5STEP (F3, d, a, b, c, in[12] + 0xe6db99e5, 11); MD5STEP (F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); MD5STEP (F3, b, c, d, a, in[2] + 0xc4ac5665, 23); MD5STEP (F4, a, b, c, d, in[0] + 0xf4292244, 6); MD5STEP (F4, d, a, b, c, in[7] + 0x432aff97, 10); MD5STEP (F4, c, d, a, b, in[14] + 0xab9423a7, 15); MD5STEP (F4, b, c, d, a, in[5] + 0xfc93a039, 21); MD5STEP (F4, a, b, c, d, in[12] + 0x655b59c3, 6); MD5STEP (F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); MD5STEP (F4, c, d, a, b, in[10] + 0xffeff47d, 15); MD5STEP (F4, b, c, d, a, in[1] + 0x85845dd1, 21); MD5STEP (F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); MD5STEP (F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); MD5STEP (F4, c, d, a, b, in[6] + 0xa3014314, 15); MD5STEP (F4, b, c, d, a, in[13] + 0x4e0811a1, 21); MD5STEP (F4, a, b, c, d, in[4] + 0xf7537e82, 6); MD5STEP (F4, d, a, b, c, in[11] + 0xbd3af235, 10); MD5STEP (F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); MD5STEP (F4, b, c, d, a, in[9] + 0xeb86d391, 21); hash[0] += a; hash[1] += b; hash[2] += c; hash[3] += d; } static inline uint32_t swap (uint32_t x) { return (((x & 0xff) << 24) | ((x & 0xff00) << 8) | ((x & 0xff0000) >> 8) | ((x & 0xff000000) >> 24)); } static inline void little_endian (uint32_t * buf, unsigned int words) { #ifdef WORDS_BIGENDIAN while (words--) buf[words] = swap (buf[words]); #endif } static void md5_writer (pgm_instance_t * instance, uint8_t * ptr, size_t size) { const unsigned int offset = instance->md5_bytes & 0x3f; instance->md5_bytes += size; if (offset + size < 64) { memcpy ((char *)instance->md5_block + offset, ptr, size); return; } else if (offset) { const int avail = 64 - offset; memcpy ((char *)instance->md5_block + offset, ptr, avail); little_endian (instance->md5_block, 16); md5_transform (instance->md5_hash, instance->md5_block); ptr += avail; size -= avail; } while (size >= 64) { #ifndef ARCH_X86 memcpy (instance->md5_block, ptr, 64); little_endian (instance->md5_block, 16); md5_transform (instance->md5_hash, instance->md5_block); #else md5_transform (instance->md5_hash, (uint32_t *)ptr); #endif ptr += 64; size -= 64; } memcpy (instance->md5_block, ptr, size); } static void md5_draw_frame (vo_instance_t * _instance, uint8_t * const * buf, void * id) { pgm_instance_t * instance = (pgm_instance_t *) _instance; unsigned int offset; uint8_t * p; int padding; instance->md5_hash[0] = 0x67452301; instance->md5_hash[1] = 0xefcdab89; instance->md5_hash[2] = 0x98badcfe; instance->md5_hash[3] = 0x10325476; instance->md5_bytes = 0; internal_draw_frame (instance, buf); offset = instance->md5_bytes & 0x3f; p = (uint8_t *)instance->md5_block + offset; padding = 55 - offset; *p++ = 0x80; if (padding < 0) { memset (p, 0, padding + 8); little_endian (instance->md5_block, 16); md5_transform (instance->md5_hash, instance->md5_block); p = (uint8_t *)instance->md5_block; padding = 56; } memset (p, 0, padding); instance->md5_block[14] = instance->md5_bytes << 3; instance->md5_block[15] = instance->md5_bytes >> 29; little_endian (instance->md5_block, 14); md5_transform (instance->md5_hash, instance->md5_block); printf ("%08x%08x%08x%08x *%d.pgm\n", swap (instance->md5_hash[0]), swap (instance->md5_hash[1]) , swap (instance->md5_hash[2]), swap (instance->md5_hash[3]), instance->framenum++); } vo_instance_t * vo_md5_open (void) { return internal_open (md5_draw_frame, md5_writer); }