/* * video_out_pgm.c * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org> * Copyright (C) 2003      Regis Duchesne <hpreg@zoy.org> * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> * 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 <stdio.h>#include <stdlib.h>#include <string.h>#include <inttypes.h>#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;    char * 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 = (char *)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 = (char *)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);}