mirror of
https://github.com/jmarshall23/CnC_Remastered_Collection.git
synced 2026-08-12 16:10:54 +02:00
Justin Marshall
1471 lines
32 KiB
C
1471 lines
32 KiB
C
/*
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libsmacker - A C library for decoding .smk Smacker Video files
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Copyright (C) 2012-2013 Greg Kennedy
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See smacker.h for more information.
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smacker.c
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Main implementation file of libsmacker.
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Open, close, query, render, advance and seek an smk
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*/
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#include "smacker.h"
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/* safe malloc and free */
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#include "smk_malloc.h"
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/* data structures */
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#include "smk_bitstream.h"
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#include "smk_hufftree.h"
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/* fp error handling */
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#include <errno.h>
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/* memset */
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#include <string.h>
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/* GLOBALS */
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/* tree processing order */
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#define SMK_TREE_MMAP 0
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#define SMK_TREE_MCLR 1
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#define SMK_TREE_FULL 2
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#define SMK_TREE_TYPE 3
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/* SMACKER DATA STRUCTURES */
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struct smk_t
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{
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/* meta-info */
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/* file mode: see flags, smacker.h */
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unsigned char mode;
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/* microsec per frame, total frames
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stored as a double to handle scaling (large positive millisec / frame values may
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overflow a ul */
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double usf;
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unsigned long f;
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/* does file contain a ring frame? */
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unsigned char ring_frame;
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/* Index of current frame */
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unsigned long cur_frame;
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/* SOURCE union.
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Where the data is going to be read from (or be stored),
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depending on the file mode. */
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union
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{
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struct
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{
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/* on-disk mode */
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FILE *fp;
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unsigned long *chunk_offset;
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} file;
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/* in-memory mode: unprocessed chunks */
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unsigned char **chunk_data;
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} source;
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/* shared
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array of "chunk sizes"*/
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unsigned long *chunk_size;
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/* Holds per-frame flags (i.e. 'keyframe') */
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unsigned char *keyframe;
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/* Holds per-frame type mask (e.g. 'audio track 3, 2, and palette swap') */
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unsigned char *frame_type;
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/* pointers to video and audio structures */
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/* Video data type: enable/disable decode switch,
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video info and flags,
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pointer to last-decoded-palette */
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struct smk_video_t
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{
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/* enable/disable decode switch */
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unsigned char enable;
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/* video info */
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unsigned long w;
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unsigned long h;
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/* Y scale mode (constants defined in smacker.h)
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0: unscaled
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1: doubled
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2: interlaced */
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unsigned char y_scale_mode;
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/* version ('2' or '4') */
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unsigned char v;
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/* Huffman trees */
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/* unsigned long tree_size[4]; */
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struct smk_huff_big_t *tree[4];
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/* Palette data type: pointer to last-decoded-palette */
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unsigned char *palette;
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/* Last-unpacked frame */
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unsigned char *frame;
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} *video;
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/* audio structure */
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struct smk_audio_t
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{
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/* enable/disable switch (per track) */
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unsigned char enable;
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/* Info */
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unsigned char channels;
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unsigned char bitdepth;
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unsigned long rate;
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/* long max_buffer; */
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/* compression type
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0: raw PCM
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1: SMK DPCM
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2: Bink (Perceptual), unsupported */
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unsigned char compress;
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/* pointer to last-decoded-audio-buffer */
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void *buffer;
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unsigned long buffer_size;
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} *audio[7];
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};
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union smk_read_t
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{
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FILE *file;
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unsigned char *ram;
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};
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/* An fread wrapper: consumes N bytes, or returns -1
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on failure (when size doesn't match expected) */
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static char smk_read_file(void *buf, const size_t size, FILE *fp)
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{
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/* don't bother checking buf or fp, fread does it for us */
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size_t bytesRead = fread(buf,1,size,fp);
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if (bytesRead != size)
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{
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fprintf(stderr,"libsmacker::smk_read_file(buf,%lu,fp) - ERROR: Short read, %lu bytes returned (errno: %d)\n",(unsigned long)size, (unsigned long)bytesRead,errno);
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perror ("\tError reported was");
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return -1;
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}
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return 0;
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}
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/* A memcpy wrapper: consumes N bytes, or returns -1
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on failure (when size too low) */
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static char smk_read_memory(void *buf, const unsigned long size, unsigned char **p, unsigned long *p_size)
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{
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if (size > *p_size)
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{
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fprintf(stderr,"libsmacker::smk_read_memory(buf,%lu,p,%lu) - ERROR: Short read\n",(unsigned long)size, (unsigned long)*p_size);
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return -1;
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}
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memcpy(buf,*p,size);
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*p += size;
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*p_size -= size;
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return 0;
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}
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/* Helper functions to do the reading, plus
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byteswap from LE to host order */
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/* read n bytes from (source) into ret */
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#define smk_read(ret,n) \
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{ \
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if(m) \
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{ \
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r = (smk_read_file(ret,n,fp.file)); \
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} \
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else \
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{ \
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r = (smk_read_memory(ret,n,&fp.ram,&size)); \
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} \
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if (r < 0) \
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{ \
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fprintf(stderr,"libsmacker::smk_read(...) - Errors encountered on read, bailing out (file: %s, line: %lu)\n", __FILE__, (unsigned long)__LINE__); \
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goto error; \
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} \
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}
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/* Calls smk_read, but returns a ul */
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#define smk_read_ul(p) \
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{ \
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smk_read(buf,4); \
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p = ((unsigned long) buf[3] << 24) | \
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((unsigned long) buf[2] << 16) | \
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((unsigned long) buf[1] << 8) | \
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((unsigned long) buf[0]); \
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}
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/* PUBLIC FUNCTIONS */
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/* open an smk (from a generic Source) */
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smk smk_open_generic(const unsigned char m, union smk_read_t fp, unsigned long size, const unsigned char process_mode)
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{
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smk s = NULL;
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/* Temporary variables */
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long temp_l;
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unsigned long temp_u;
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/* r is used by macros above for return code */
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char r;
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unsigned char buf[4] = {'\0'};
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/* video hufftrees are stored as a large chunk (bitstream)
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these vars are used to load, then decode them */
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unsigned char *hufftree_chunk = NULL;
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unsigned long tree_size;
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/* a bitstream struct */
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struct smk_bit_t *bs = NULL;
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/* safe malloc the structure */
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smk_malloc (s,sizeof (struct smk_t));
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/* safe malloc the structure components */
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smk_malloc(s->video,sizeof(struct smk_video_t));
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/* Check for a valid signature */
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smk_read(buf,3);
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if (buf[0] != 'S' || buf[1] != 'M' || buf[2] != 'K')
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{
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fprintf(stderr,"libsmacker::smk_open_generic - ERROR: invalid SMKn signature (got: %s)\n",buf);
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goto error;
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}
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/* Read .smk file version */
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smk_read(&s->video->v,1);
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if (s->video->v != '2' && s->video->v != '4')
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{
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fprintf(stderr,"libsmacker::smk_open_generic - Warning: invalid SMK version %c (expected: 2 or 4)\n",s->video->v);
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/* take a guess */
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if (s->video->v < '4')
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{
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s->video->v = '2';
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}
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else
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{
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s->video->v = '4';
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}
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fprintf(stderr,"\tProcessing will continue as type %c\n",s->video->v);
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}
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/* width, height, total num frames */
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smk_read_ul(s->video->w);
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smk_read_ul(s->video->h);
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smk_read_ul(s->f);
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/* frames per second calculation */
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smk_read_ul(temp_u);
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temp_l = (int)temp_u;
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if (temp_l > 0)
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{
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/* millisec per frame */
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s->usf = temp_l * 1000;
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}
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else if (temp_l < 0)
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{
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/* 10 microsec per frame */
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s->usf = temp_l * -10;
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}
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else
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{
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/* defaults to 10 usf (= 100000 microseconds) */
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s->usf = 100000;
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}
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/* Video flags follow.
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Ring frame is important to libsmacker.
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Y scale / Y interlace go in the Video flags.
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The user should scale appropriately. */
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smk_read_ul(temp_u);
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if (temp_u & 0x01)
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{
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s->ring_frame = 1;
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}
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if (temp_u & 0x02)
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{
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s->video->y_scale_mode = SMK_FLAG_Y_DOUBLE;
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}
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if (temp_u & 0x04)
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{
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if (s->video->y_scale_mode == SMK_FLAG_Y_DOUBLE)
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{
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fputs("libsmacker::smk_open_generic - Warning: SMK file specifies both Y-Double AND Y-Interlace.\n",stderr);
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}
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s->video->y_scale_mode = SMK_FLAG_Y_INTERLACE;
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}
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/* Max buffer size for each audio track - we don't use
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but calling application might. */
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for (temp_l = 0; temp_l < 7; temp_l ++)
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{
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/* smk_read_ul(s->audio[temp_u]->max_buffer); */
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smk_read_ul(temp_u);
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}
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/* Read size of "hufftree chunk" - save for later. */
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smk_read_ul(tree_size);
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/* "unpacked" sizes of each huff tree - we don't use
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but calling application might. */
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for (temp_l = 0; temp_l < 4; temp_l ++)
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{
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/* smk_read_ul(s->video->tree_size[temp_u]); */
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smk_read_ul(temp_u);
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}
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/* read audio rate data */
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for (temp_l = 0; temp_l < 7; temp_l ++)
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{
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smk_read_ul(temp_u);
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if (temp_u & (1 << 30))
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{
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/* Audio track specifies "exists" flag, malloc structure and copy components. */
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smk_malloc(s->audio[temp_l],sizeof(struct smk_audio_t));
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if (temp_u & (1 << 31))
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{
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s->audio[temp_l]->compress = 1;
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}
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s->audio[temp_l]->bitdepth = ((temp_u & (1 << 29)) ? 16 : 8);
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s->audio[temp_l]->channels = ((temp_u & (1 << 28)) ? 2 : 1);
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if (temp_u & (0x03 << 26))
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{
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fprintf(stderr,"libsmacker::smk_open_generic - Warning: audio track %ld is compressed with Bink (perceptual) Audio Codec: this is currently unsupported by libsmacker\n",temp_l);
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s->audio[temp_l]->compress = 2;
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}
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/* Bits 25 & 24 are unused. */
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s->audio[temp_l]->rate = (temp_u & 0x00FFFFFF);
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}
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}
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/* Skip over Dummy field */
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smk_read_ul(temp_u);
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/* FrameSizes and Keyframe marker are stored together. */
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smk_malloc(s->keyframe,(s->f + s->ring_frame));
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smk_malloc(s->chunk_size,(s->f + s->ring_frame) * sizeof(unsigned long));
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for (temp_u = 0; temp_u < (s->f + s->ring_frame); temp_u ++)
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{
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smk_read_ul(s->chunk_size[temp_u]);
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/* Set Keyframe */
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if (s->chunk_size[temp_u] & 0x01)
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{
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s->keyframe[temp_u] = 1;
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}
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/* Bits 1 is used, but the purpose is unknown. */
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s->chunk_size[temp_u] &= 0xFFFFFFFC;
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}
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/* That was easy... Now read FrameTypes! */
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smk_malloc(s->frame_type,(s->f + s->ring_frame));
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for (temp_u = 0; temp_u < (s->f + s->ring_frame); temp_u ++)
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{
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smk_read(&s->frame_type[temp_u],1);
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}
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/* HuffmanTrees
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We know the sizes already: read and assemble into
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something actually parse-able at run-time */
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smk_malloc(hufftree_chunk,tree_size);
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smk_read(hufftree_chunk,tree_size);
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/* set up a Bitstream */
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bs = smk_bs_init(hufftree_chunk, tree_size);
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/* create some tables */
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for (temp_u = 0; temp_u < 4; temp_u ++)
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{
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smk_huff_big_safe_build(bs,s->video->tree[temp_u]);
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}
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/* clean up */
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smk_free(bs);
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smk_free(hufftree_chunk);
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/* final processing: depending on ProcessMode, handle what to do with rest of file data */
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s->mode = process_mode;
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/* Handle the rest of the data.
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For MODE_MEMORY, read the chunks and store */
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if (s->mode == SMK_MODE_MEMORY)
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{
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smk_malloc(s->source.chunk_data,(s->f + s->ring_frame) * sizeof(unsigned char*));
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for (temp_u = 0; temp_u < (s->f + s->ring_frame); temp_u ++)
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{
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smk_malloc(s->source.chunk_data[temp_u],s->chunk_size[temp_u]);
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smk_read(s->source.chunk_data[temp_u],s->chunk_size[temp_u]);
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}
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}
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else
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{
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/* MODE_STREAM: don't read anything now, just precompute offsets.
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use fseek to verify that the file is "complete" */
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smk_malloc(s->source.file.chunk_offset,(s->f + s->ring_frame) * sizeof(unsigned long));
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for (temp_u = 0; temp_u < (s->f + s->ring_frame); temp_u ++)
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{
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s->source.file.chunk_offset[temp_u] = ftell(fp.file);
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if (fseek(fp.file,s->chunk_size[temp_u],SEEK_CUR))
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{
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fprintf(stderr,"libsmacker::smk_open - ERROR: fseek to frame %lu not OK.\n",temp_u);
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perror ("\tError reported was");
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goto error;
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}
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}
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}
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return s;
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error:
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smk_free(bs);
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smk_free(hufftree_chunk);
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smk_close(s);
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return NULL;
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}
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/* open an smk (from a memory buffer) */
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smk smk_open_memory(const unsigned char* buffer, const unsigned long size)
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{
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smk s = NULL;
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union smk_read_t fp;
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smk_null_check(buffer);
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/* set up the read union for Memory mode */
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fp.ram = (unsigned char *)buffer;
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if (!(s = smk_open_generic(0,fp,size,SMK_MODE_MEMORY)))
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{
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fprintf(stderr,"libsmacker::smk_open_memory(buffer,%lu) - ERROR: Fatal error in smk_open_generic, returning NULL.\n",size);
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}
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error:
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return s;
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}
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/* open an smk (from a file) */
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smk smk_open_file(const char* filename, const unsigned char mode)
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{
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smk s = NULL;
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union smk_read_t fp;
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smk_null_check(filename);
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if (!(fp.file = fopen(filename,"rb")))
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{
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fprintf(stderr,"libsmacker::smk_open_file(%s,%u) - ERROR: could not open file (errno: %d)\n",filename,mode,errno);
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perror ("\tError reported was");
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goto error;
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}
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if (!(s = smk_open_generic(1,fp,0,mode)))
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{
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fprintf(stderr,"libsmacker::smk_open_file(%s,%u) - ERROR: Fatal error in smk_open_generic, returning NULL.\n",filename,mode);
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fclose(fp.file);
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goto error;
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}
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if (mode == SMK_MODE_MEMORY)
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{
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fclose(fp.file);
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}
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else
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{
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s->source.file.fp = fp.file;
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}
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error:
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return s;
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}
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/* close out an smk file and clean up memory */
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void smk_close(smk s)
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{
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unsigned long u;
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smk_null_check(s);
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/* free video sub-components */
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if (s->video)
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{
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for (u = 0; u < 4; u ++)
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{
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smk_huff_free(s->video->tree[u]->t);
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smk_free(s->video->tree[u]);
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}
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smk_free(s->video->palette);
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smk_free(s->video->frame);
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smk_free(s->video);
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}
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/* free audio sub-components */
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for (u=0; u<7; u++)
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{
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if (s->audio[u])
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{
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smk_free(s->audio[u]->buffer);
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smk_free(s->audio[u]);
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}
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}
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smk_free(s->keyframe);
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smk_free(s->frame_type);
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if (s->mode == SMK_MODE_DISK)
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{
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/* disk-mode */
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if (s->source.file.fp)
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{
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fclose(s->source.file.fp);
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}
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smk_free(s->source.file.chunk_offset);
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}
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else
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{
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/* mem-mode */
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if (s->source.chunk_data != NULL)
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{
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|
for (u=0; u<(s->f + s->ring_frame); u++)
|
|
{
|
|
smk_free(s->source.chunk_data[u]);
|
|
}
|
|
smk_free(s->source.chunk_data);
|
|
}
|
|
}
|
|
smk_free(s->chunk_size);
|
|
|
|
smk_free(s);
|
|
|
|
error: ;
|
|
}
|
|
|
|
/* tell some info about the file */
|
|
char smk_info_all(const smk object, unsigned long *frame, unsigned long *frame_count, double *usf)
|
|
{
|
|
/* sanity check */
|
|
smk_null_check(object);
|
|
if (!frame && !frame_count && !usf)
|
|
{
|
|
fputs("libsmacker::smk_info_all(object,frame,frame_count,usf) - ERROR: Request for info with all-NULL return references\n",stderr);
|
|
goto error;
|
|
}
|
|
if (frame)
|
|
{
|
|
*frame = (object->cur_frame % object->f);
|
|
}
|
|
if (frame_count)
|
|
{
|
|
*frame_count = object->f;
|
|
}
|
|
if (usf)
|
|
{
|
|
*usf = object->usf;
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
char smk_info_video(const smk object, unsigned long *w, unsigned long *h, unsigned char *y_scale_mode)
|
|
{
|
|
/* sanity check */
|
|
smk_null_check(object);
|
|
if (!w && !h && !y_scale_mode)
|
|
{
|
|
fputs("libsmacker::smk_info_all(object,w,h,y_scale_mode) - ERROR: Request for info with all-NULL return references\n",stderr);
|
|
return -1;
|
|
}
|
|
if (w)
|
|
{
|
|
*w = object->video->w;
|
|
}
|
|
if (h)
|
|
{
|
|
*h = object->video->h;
|
|
}
|
|
if (y_scale_mode)
|
|
{
|
|
*y_scale_mode = object->video->y_scale_mode;
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
char smk_info_audio(const smk object, unsigned char *track_mask, unsigned char channels[7], unsigned char bitdepth[7], unsigned long audio_rate[7])
|
|
{
|
|
unsigned char i;
|
|
|
|
/* sanity check */
|
|
smk_null_check(object);
|
|
|
|
if (!track_mask && !channels && !bitdepth && !audio_rate)
|
|
{
|
|
fputs("libsmacker::smk_info_audio(object,track_mask,channels,bitdepth,audio_rate) - ERROR: Request for info with all-NULL return references\n",stderr);
|
|
return -1;
|
|
}
|
|
if (track_mask)
|
|
{
|
|
*track_mask = ( (object->audio[0] != NULL) |
|
|
( (object->audio[1] != NULL) << 1 ) |
|
|
( (object->audio[2] != NULL) << 2 ) |
|
|
( (object->audio[3] != NULL) << 3 ) |
|
|
( (object->audio[4] != NULL) << 4 ) |
|
|
( (object->audio[5] != NULL) << 5 ) |
|
|
( (object->audio[6] != NULL) << 6 ) );
|
|
}
|
|
if (channels)
|
|
{
|
|
for (i = 0; i < 7; i ++)
|
|
{
|
|
channels[i] = ( object->audio[i] ? object->audio[i]->channels : 0);
|
|
}
|
|
}
|
|
if (bitdepth)
|
|
{
|
|
for (i = 0; i < 7; i ++)
|
|
{
|
|
bitdepth[i] = ( object->audio[i] ? object->audio[i]->bitdepth : 0);
|
|
}
|
|
}
|
|
if (audio_rate)
|
|
{
|
|
for (i = 0; i < 7; i ++)
|
|
{
|
|
audio_rate[i] = ( object->audio[i] ? object->audio[i]->rate : 0);
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
/* Enable-disable switches */
|
|
char smk_enable_all(smk object, const unsigned char mask)
|
|
{
|
|
unsigned char i;
|
|
|
|
/* sanity check */
|
|
smk_null_check(object);
|
|
smk_null_check(object->video);
|
|
|
|
object->video->enable = 1; //(mask & 0x80);
|
|
|
|
for (i = 0; i < 7; i ++)
|
|
{
|
|
if (object->audio[i])
|
|
{
|
|
object->audio[i]->enable = 1; //(mask & (0x01 << i));
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
char smk_enable_video(smk object, const unsigned char enable)
|
|
{
|
|
/* sanity check */
|
|
smk_null_check(object);
|
|
smk_null_check(object->video);
|
|
|
|
object->video->enable = enable;
|
|
return 0;
|
|
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
char smk_enable_audio(smk object, const unsigned char track, const unsigned char enable)
|
|
{
|
|
/* sanity check */
|
|
smk_null_check(object);
|
|
smk_null_check(object->audio[track]);
|
|
|
|
object->audio[track]->enable = enable;
|
|
return 0;
|
|
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
unsigned char * smk_get_palette(const smk object)
|
|
{
|
|
smk_null_check(object);
|
|
smk_null_check(object->video);
|
|
|
|
return object->video->palette;
|
|
|
|
error:
|
|
return NULL;
|
|
}
|
|
unsigned char * smk_get_video(const smk object)
|
|
{
|
|
smk_null_check(object);
|
|
smk_null_check(object->video);
|
|
|
|
return object->video->frame;
|
|
|
|
error:
|
|
return NULL;
|
|
}
|
|
unsigned char * smk_get_audio(const smk object, const unsigned char t)
|
|
{
|
|
smk_null_check(object);
|
|
smk_null_check(object->audio[t]);
|
|
|
|
return object->audio[t]->buffer;
|
|
|
|
error:
|
|
return NULL;
|
|
}
|
|
unsigned long smk_get_audio_size(const smk object, const unsigned char t)
|
|
{
|
|
smk_null_check(object);
|
|
smk_null_check(object->audio[t]);
|
|
|
|
return object->audio[t]->buffer_size;
|
|
|
|
error:
|
|
return 0;
|
|
}
|
|
|
|
/* Decompresses a palette-frame. */
|
|
static char smk_render_palette(struct smk_video_t *s, unsigned char *p, unsigned long size)
|
|
{
|
|
unsigned short i,j,k;
|
|
unsigned char *t= NULL;
|
|
|
|
/* Smacker palette map */
|
|
const unsigned char palmap[64] =
|
|
{
|
|
0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C,
|
|
0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
|
|
0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D,
|
|
0x61, 0x65, 0x69, 0x6D, 0x71, 0x75, 0x79, 0x7D,
|
|
0x82, 0x86, 0x8A, 0x8E, 0x92, 0x96, 0x9A, 0x9E,
|
|
0xA2, 0xA6, 0xAA, 0xAE, 0xB2, 0xB6, 0xBA, 0xBE,
|
|
0xC3, 0xC7, 0xCB, 0xCF, 0xD3, 0xD7, 0xDB, 0xDF,
|
|
0xE3, 0xE7, 0xEB, 0xEF, 0xF3, 0xF7, 0xFB, 0xFF
|
|
};
|
|
|
|
/* sanity check */
|
|
smk_null_check(s);
|
|
smk_null_check(p);
|
|
|
|
/* Allocate a placeholder for our palette. */
|
|
smk_malloc(t,768);
|
|
|
|
i = 0; /* index into NEW palette */
|
|
j = 0; /* Index into OLD palette */
|
|
|
|
while ( (i < 768) && (size > 0) ) /* looping index into NEW palette */
|
|
{
|
|
if ((*p) & 0x80)
|
|
{
|
|
/* Copy (c + 1) color entries of the previous palette
|
|
to the next entries of the new palette. */
|
|
k = (((*p) & 0x7F) + 1) * 3;
|
|
p ++; size --;
|
|
|
|
/* check for overflow condition */
|
|
if (i + k > 768)
|
|
{
|
|
fprintf(stderr,"libsmacker::palette_render(s,p,size) - ERROR: overflow, 0x80 attempt to copy %d bytes from %d\n",k,i);
|
|
goto error;
|
|
}
|
|
|
|
/* if prev palette exists, copy... else memset black */
|
|
if (s->palette)
|
|
{
|
|
memcpy(&t[i],&s->palette[i],k);
|
|
}
|
|
/* smkmalloc already set t to 0 */
|
|
/* else
|
|
{
|
|
memset(&t[i],0,k);
|
|
} */
|
|
i += k;
|
|
}
|
|
else if ((*p) & 0x40)
|
|
{
|
|
/* Copy (c + 1) color entries of the previous palette,
|
|
starting from entry (s)
|
|
to the next entries of the new palette. */
|
|
if (size < 2)
|
|
{
|
|
fputs("libsmacker::palette_render(s,p,size) - ERROR: 0x40 ran out of bytes for copy\n",stderr);
|
|
goto error;
|
|
}
|
|
|
|
/* pick "count" items to copy */
|
|
k = (((*p) & 0x3F) + 1) * 3; /* count */
|
|
p ++; size --;
|
|
|
|
/* start offset of old palette */
|
|
j = (*p) * 3;
|
|
p ++; size --;
|
|
|
|
if (j + k > 768 || i + k > 768)
|
|
{
|
|
fprintf(stderr,"libsmacker::palette_render(s,p,size) - ERROR: overflow, 0x40 attempt to copy %d bytes from %d to %d\n",k,j,i);
|
|
goto error;
|
|
}
|
|
|
|
if (s->palette)
|
|
{
|
|
memcpy(&t[i],&s->palette[j],k);
|
|
}
|
|
/* else
|
|
{
|
|
memset(&t[i],0,k);
|
|
} */
|
|
i += k;
|
|
j += k;
|
|
}
|
|
else
|
|
{
|
|
if (size < 3)
|
|
{
|
|
fprintf(stderr,"libsmacker::palette_render - ERROR: 0x3F ran out of bytes for copy, size=%lu\n",size);
|
|
goto error;
|
|
}
|
|
t[i++] = palmap[(*p) & 0x3F];
|
|
p++; size --;
|
|
/* To be extremely correct we should blow up if (*p) exceeds 0x3F, but
|
|
I can't be bothered, so just mask it */
|
|
t[i++] = palmap[(*p) & 0x3F];
|
|
p++; size --;
|
|
t[i++] = palmap[(*p) & 0x3F];
|
|
p++; size --;
|
|
}
|
|
}
|
|
|
|
if (i < 768)
|
|
{
|
|
fprintf(stderr,"libsmacker::palette_render - ERROR: did not completely fill palette (idx=%u)\n",i);
|
|
goto error;
|
|
}
|
|
|
|
/* free old palette frame if one exists */
|
|
smk_free (s->palette);
|
|
s->palette = t;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
/* Free old palette, set to current, return -1
|
|
The new palette probably has errors but is preferrable to a black screen */
|
|
smk_free (s->palette);
|
|
s->palette = t;
|
|
return -1;
|
|
}
|
|
|
|
static char smk_render_video(struct smk_video_t *s, unsigned char *p, unsigned int size)
|
|
{
|
|
unsigned char *t = NULL,s1,s2;
|
|
unsigned short temp;
|
|
unsigned long i,j,k, row, col,skip;
|
|
|
|
/* used for video decoding */
|
|
struct smk_bit_t *bs = NULL;
|
|
|
|
/* results from a tree lookup */
|
|
long unpack;
|
|
|
|
/* unpack, broken into pieces */
|
|
unsigned char type;
|
|
unsigned char blocklen;
|
|
unsigned char typedata;
|
|
|
|
const unsigned short sizetable[64] = {
|
|
1, 2, 3, 4, 5, 6, 7, 8,
|
|
9, 10, 11, 12, 13, 14, 15, 16,
|
|
17, 18, 19, 20, 21, 22, 23, 24,
|
|
25, 26, 27, 28, 29, 30, 31, 32,
|
|
33, 34, 35, 36, 37, 38, 39, 40,
|
|
41, 42, 43, 44, 45, 46, 47, 48,
|
|
49, 50, 51, 52, 53, 54, 55, 56,
|
|
57, 58, 59, 128, 256, 512, 1024, 2048
|
|
};
|
|
|
|
/* sanity check */
|
|
smk_null_check(s);
|
|
smk_null_check(p);
|
|
|
|
smk_malloc(t,s->w * s->h);
|
|
|
|
row = 0;
|
|
col = 0;
|
|
|
|
/* Set up a bitstream for video unpacking */
|
|
/* We could check the return code but it will only fail if p is null and we already verified that. */
|
|
bs = smk_bs_init (p, size);
|
|
|
|
/* Reset the cache on all bigtrees */
|
|
smk_huff_big_reset(s->tree[0]);
|
|
smk_huff_big_reset(s->tree[1]);
|
|
smk_huff_big_reset(s->tree[2]);
|
|
smk_huff_big_reset(s->tree[3]);
|
|
|
|
while ( row < s->h )
|
|
{
|
|
smk_huff_big_safe_lookup(bs,s->tree[SMK_TREE_TYPE],unpack);
|
|
|
|
type = ((unpack & 0x0003));
|
|
blocklen = ((unpack & 0x00FC) >> 2);
|
|
typedata = ((unpack & 0xFF00) >> 8);
|
|
|
|
/* support for v4 full-blocks */
|
|
if (type == 1 && s->v == '4')
|
|
{
|
|
if (smk_bs_read_1(bs))
|
|
{
|
|
type = 4;
|
|
}
|
|
else if (smk_bs_read_1(bs))
|
|
{
|
|
type = 5;
|
|
}
|
|
}
|
|
|
|
for (j = 0; (j < sizetable[blocklen]) && (row < s->h); j ++)
|
|
{
|
|
skip = (row * s->w) + col;
|
|
switch(type)
|
|
{
|
|
case 0:
|
|
smk_huff_big_safe_lookup(bs,s->tree[SMK_TREE_MCLR],unpack);
|
|
s1 = (unpack & 0xFF00) >> 8;
|
|
s2 = (unpack & 0x00FF);
|
|
smk_huff_big_safe_lookup(bs,s->tree[SMK_TREE_MMAP],unpack);
|
|
|
|
temp = 0x01;
|
|
for (k = 0; k < 4; k ++)
|
|
{
|
|
for (i = 0; i < 4; i ++)
|
|
{
|
|
if (unpack & temp)
|
|
{
|
|
t[skip + i] = s1;
|
|
}
|
|
else
|
|
{
|
|
t[skip + i] = s2;
|
|
}
|
|
temp = temp << 1;
|
|
}
|
|
skip += s->w;
|
|
}
|
|
break;
|
|
|
|
case 1: /* FULL BLOCK */
|
|
for (k = 0; k < 4; k ++)
|
|
{
|
|
smk_huff_big_safe_lookup(bs,s->tree[SMK_TREE_FULL],unpack);
|
|
t[skip + 3] = ((unpack & 0xFF00) >> 8);
|
|
t[skip + 2] = (unpack & 0x00FF);
|
|
smk_huff_big_safe_lookup(bs,s->tree[SMK_TREE_FULL],unpack);
|
|
t[skip + 1] = ((unpack & 0xFF00) >> 8);
|
|
t[skip] = (unpack & 0x00FF);
|
|
skip += s->w;
|
|
}
|
|
break;
|
|
case 2: /* VOID BLOCK */
|
|
if (s->frame)
|
|
{
|
|
memcpy(&t[skip], &s->frame[skip], 4);
|
|
skip += s->w;
|
|
memcpy(&t[skip], &s->frame[skip], 4);
|
|
skip += s->w;
|
|
memcpy(&t[skip], &s->frame[skip], 4);
|
|
skip += s->w;
|
|
memcpy(&t[skip], &s->frame[skip], 4);
|
|
}
|
|
break;
|
|
case 3: /* SOLID BLOCK */
|
|
memset(&t[skip],typedata,4);
|
|
skip += s->w;
|
|
memset(&t[skip],typedata,4);
|
|
skip += s->w;
|
|
memset(&t[skip],typedata,4);
|
|
skip += s->w;
|
|
memset(&t[skip],typedata,4);
|
|
break;
|
|
case 4: /* V4 DOUBLE BLOCK */
|
|
for (k = 0; k < 2; k ++)
|
|
{
|
|
smk_huff_big_safe_lookup(bs,s->tree[SMK_TREE_FULL],unpack);
|
|
for (i = 0; i < 2; i ++)
|
|
{
|
|
memset(&t[skip + 2],(unpack & 0xFF00) >> 8,2);
|
|
memset(&t[skip],(unpack & 0x00FF),2);
|
|
skip += s->w;
|
|
}
|
|
}
|
|
break;
|
|
case 5: /* V4 HALF BLOCK */
|
|
for (k = 0; k < 2; k ++)
|
|
{
|
|
smk_huff_big_safe_lookup(bs,s->tree[SMK_TREE_FULL],unpack);
|
|
t[skip + 3] = ((unpack & 0xFF00) >> 8);
|
|
t[skip + 2] = (unpack & 0x00FF);
|
|
t[skip + s->w + 3] = ((unpack & 0xFF00) >> 8);
|
|
t[skip + s->w + 2] = (unpack & 0x00FF);
|
|
smk_huff_big_safe_lookup(bs,s->tree[SMK_TREE_FULL],unpack);
|
|
t[skip + 1] = ((unpack & 0xFF00) >> 8);
|
|
t[skip] = (unpack & 0x00FF);
|
|
t[skip + s->w + 1] = ((unpack & 0xFF00) >> 8);
|
|
t[skip + s->w] = (unpack & 0x00FF);
|
|
skip += (s->w << 1);
|
|
}
|
|
break;
|
|
}
|
|
col += 4;
|
|
if (col >= s->w)
|
|
{
|
|
col = 0;
|
|
row += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
smk_free(bs);
|
|
smk_free (s->frame);
|
|
s->frame = t;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
smk_free(bs);
|
|
smk_free (s->frame);
|
|
s->frame = t;
|
|
return -1;
|
|
}
|
|
|
|
/* Decompress audio track i. */
|
|
static char smk_render_audio(struct smk_audio_t *s, unsigned char *p, unsigned long size)
|
|
{
|
|
unsigned int j,k;
|
|
unsigned char *t = NULL;
|
|
struct smk_bit_t *bs = NULL;
|
|
|
|
char bit;
|
|
short unpack, unpack2;
|
|
|
|
/* used for audio decoding */
|
|
struct smk_huff_t *aud_tree[4] = {NULL,NULL,NULL,NULL};
|
|
|
|
/* sanity check */
|
|
smk_null_check(s);
|
|
smk_null_check(p);
|
|
|
|
if (!s->compress)
|
|
{
|
|
/* Raw PCM data, update buffer size and malloc */
|
|
s->buffer_size = size;
|
|
smk_malloc(t,s->buffer_size);
|
|
|
|
memcpy(t,p,size);
|
|
}
|
|
else if (s->compress == 1)
|
|
{
|
|
/* SMACKER DPCM compression */
|
|
/* need at least 4 bytes to process */
|
|
if (size < 4)
|
|
{
|
|
fputs("libsmacker::smk_render_audio() - ERROR: need 4 bytes to get unpacked output buffer size.\n",stderr);
|
|
goto error;
|
|
}
|
|
/* chunk is compressed (huff-compressed dpcm), retrieve unpacked buffer size */
|
|
s->buffer_size = ((unsigned int) p[3] << 24) |
|
|
((unsigned int) p[2] << 16) |
|
|
((unsigned int) p[1] << 8) |
|
|
((unsigned int) p[0]);
|
|
|
|
p += 4;
|
|
size -= 4;
|
|
|
|
/* malloc a buffer to hold unpacked audio */
|
|
smk_malloc(t,s->buffer_size);
|
|
|
|
/* Compressed audio: must unpack here */
|
|
/* Set up a bitstream */
|
|
bs = smk_bs_init (p, size);
|
|
|
|
smk_bs_safe_read_1(bs,bit);
|
|
|
|
if (!bit)
|
|
{
|
|
fputs("libsmacker::smk_render_audio - ERROR: initial get_bit returned 0\n",stderr);
|
|
goto error;
|
|
}
|
|
|
|
smk_bs_safe_read_1(bs,bit);
|
|
if (s->channels != (bit == 1 ? 2 : 1))
|
|
{
|
|
fputs("libsmacker::smk_render - ERROR: mono/stereo mismatch\n",stderr);
|
|
}
|
|
smk_bs_safe_read_1(bs,bit);
|
|
if (s->bitdepth != (bit == 1 ? 16 : 8))
|
|
{
|
|
fputs("libsmacker::smk_render - ERROR: 8-/16-bit mismatch\n",stderr);
|
|
}
|
|
|
|
/* build the trees */
|
|
smk_huff_safe_build(bs,aud_tree[0]);
|
|
j = 1;
|
|
k = 1;
|
|
if (s->bitdepth == 16)
|
|
{
|
|
smk_huff_safe_build(bs,aud_tree[1]);
|
|
k = 2;
|
|
}
|
|
if (s->channels == 2)
|
|
{
|
|
smk_huff_safe_build(bs,aud_tree[2]);
|
|
j = 2;
|
|
k = 2;
|
|
if (s->bitdepth == 16)
|
|
{
|
|
smk_huff_safe_build(bs,aud_tree[3]);
|
|
k = 4;
|
|
}
|
|
}
|
|
|
|
/* read initial sound level */
|
|
if (s->channels == 2)
|
|
{
|
|
smk_bs_safe_read_8(bs,unpack);
|
|
if (s->bitdepth == 16)
|
|
{
|
|
smk_bs_safe_read_8(bs,((short *)t)[1])
|
|
((short *)t)[1] |= (unpack << 8);
|
|
}
|
|
else
|
|
{
|
|
((unsigned char *)t)[1] = (unsigned char)unpack;
|
|
}
|
|
}
|
|
smk_bs_safe_read_8(bs,unpack);
|
|
if (s->bitdepth == 16)
|
|
{
|
|
smk_bs_safe_read_8(bs,((short *)t)[0])
|
|
((short *)t)[0] |= (unpack << 8);
|
|
}
|
|
else
|
|
{
|
|
((unsigned char *)t)[0] = (unsigned char)unpack;
|
|
}
|
|
|
|
/* All set: let's read some DATA! */
|
|
while (k < s->buffer_size)
|
|
{
|
|
if (s->bitdepth == 8)
|
|
{
|
|
smk_huff_safe_lookup(bs,aud_tree[0],unpack);
|
|
((unsigned char *)t)[j] = (char)unpack + ((unsigned char *)t)[j - s->channels];
|
|
j ++;
|
|
k++;
|
|
}
|
|
else
|
|
{
|
|
smk_huff_safe_lookup(bs,aud_tree[0],unpack);
|
|
smk_huff_safe_lookup(bs,aud_tree[1],unpack2);
|
|
((short *)t)[j] = (short) ( unpack | (unpack2 << 8) ) + ((short *)t)[j - s->channels];
|
|
j ++;
|
|
k+=2;
|
|
}
|
|
if (s->channels == 2)
|
|
{
|
|
if (s->bitdepth == 8)
|
|
{
|
|
smk_huff_safe_lookup(bs,aud_tree[2],unpack);
|
|
((unsigned char *)t)[j] = (char)unpack + ((unsigned char *)t)[j - 2];
|
|
j ++;
|
|
k++;
|
|
}
|
|
else
|
|
{
|
|
smk_huff_safe_lookup(bs,aud_tree[2],unpack);
|
|
smk_huff_safe_lookup(bs,aud_tree[3],unpack2);
|
|
((short *)t)[j] = (short) ( unpack | (unpack2 << 8) ) + ((short *)t)[j - 2];
|
|
j ++;
|
|
k+=2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* All done with the trees, free them. */
|
|
for (j = 0; j < 4; j ++)
|
|
{
|
|
if (aud_tree[j])
|
|
{
|
|
smk_huff_free(aud_tree[j]);
|
|
}
|
|
}
|
|
|
|
/* free bitstream */
|
|
smk_free(bs);
|
|
}
|
|
|
|
smk_free(s->buffer);
|
|
s->buffer = t;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
/* All done with the trees, free them. */
|
|
for (j = 0; j < 4; j ++)
|
|
{
|
|
if (aud_tree[j])
|
|
{
|
|
smk_huff_free(aud_tree[j]);
|
|
}
|
|
}
|
|
|
|
smk_free(bs);
|
|
smk_free(s->buffer);
|
|
s->buffer = t;
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* "Renders" (unpacks) the frame at cur_frame
|
|
Preps all the image and audio pointers */
|
|
static char smk_render(smk s)
|
|
{
|
|
unsigned long i,size;
|
|
unsigned char *buffer = NULL, *p,track;
|
|
|
|
/* sanity check */
|
|
smk_null_check(s);
|
|
|
|
/* Retrieve current chunk_size for this frame. */
|
|
if (!(i = s->chunk_size[s->cur_frame]))
|
|
{
|
|
fprintf(stderr,"libsmacker::smk_render(s) - Warning: frame %lu: chunk_size is 0.\n",s->cur_frame);
|
|
goto error;
|
|
}
|
|
|
|
if (s->mode == SMK_MODE_DISK)
|
|
{
|
|
/* Skip to frame in file */
|
|
if (fseek(s->source.file.fp,s->source.file.chunk_offset[s->cur_frame],SEEK_SET))
|
|
{
|
|
fprintf(stderr,"libsmacker::smk_render(s) - ERROR: fseek to frame %lu (offset %lu) failed.\n",s->cur_frame,s->source.file.chunk_offset[s->cur_frame]);
|
|
perror ("\tError reported was");
|
|
goto error;
|
|
}
|
|
|
|
/* In disk-streaming mode: make way for our incoming chunk buffer */
|
|
smk_malloc(buffer, i);
|
|
|
|
/* Read into buffer */
|
|
if ( smk_read_file(buffer,s->chunk_size[s->cur_frame],s->source.file.fp) < 0)
|
|
{
|
|
fprintf(stderr,"libsmacker::smk_render(s) - ERROR: frame %lu (offset %lu): smk_read had errors.\n",s->cur_frame,s->source.file.chunk_offset[s->cur_frame]);
|
|
goto error;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Just point buffer at the right place */
|
|
if (!s->source.chunk_data[s->cur_frame])
|
|
{
|
|
fprintf(stderr,"libsmacker::smk_render(s) - ERROR: frame %lu: memory chunk is a NULL pointer.\n",s->cur_frame);
|
|
goto error;
|
|
}
|
|
buffer = s->source.chunk_data[s->cur_frame];
|
|
}
|
|
|
|
p = buffer;
|
|
|
|
/* Palette record first */
|
|
if (s->frame_type[s->cur_frame] & 0x01)
|
|
{
|
|
/* need at least 1 byte to process */
|
|
if (!i)
|
|
{
|
|
fprintf(stderr,"libsmacker::smk_render(s) - ERROR: frame %lu: insufficient data for a palette rec.\n",s->cur_frame);
|
|
goto error;
|
|
}
|
|
|
|
/* Byte 1 in block, times 4, tells how many
|
|
subsequent bytes are present */
|
|
size = 4 * (*p);
|
|
|
|
/* If video rendering enabled, kick this off for decode. */
|
|
if (s->video->enable)
|
|
{
|
|
smk_render_palette(s->video,p + 1,size - 1);
|
|
}
|
|
p += size;
|
|
i -= size;
|
|
}
|
|
|
|
/* Unpack audio chunks */
|
|
for (track = 0; track < 7; track ++)
|
|
{
|
|
if (s->frame_type[s->cur_frame] & (0x02 << track))
|
|
{
|
|
/* need at least 4 byte to process */
|
|
if (i < 4)
|
|
{
|
|
fprintf(stderr,"libsmacker::smk_render(s) - ERROR: frame %lu: insufficient data for audio[%u] rec.\n",s->cur_frame,track);
|
|
goto error;
|
|
}
|
|
|
|
/* First 4 bytes in block tell how many
|
|
subsequent bytes are present */
|
|
size = (((unsigned int) p[3] << 24) |
|
|
((unsigned int) p[2] << 16) |
|
|
((unsigned int) p[1] << 8) |
|
|
((unsigned int) p[0]));
|
|
|
|
/* If audio rendering enabled, kick this off for decode. */
|
|
if (s->audio[track] != NULL && s->audio[track]->enable)
|
|
{
|
|
smk_render_audio(s->audio[track],p + 4,size - 4);
|
|
}
|
|
p += size;
|
|
i -= size;
|
|
}
|
|
}
|
|
|
|
/* Unpack video chunk */
|
|
if (s->video->enable)
|
|
{
|
|
smk_render_video(s->video, p,i);
|
|
}
|
|
|
|
if (s->mode == SMK_MODE_DISK)
|
|
{
|
|
/* Remember that buffer we allocated? Trash it */
|
|
smk_free(buffer);
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
if (s->mode == SMK_MODE_DISK)
|
|
{
|
|
/* Remember that buffer we allocated? Trash it */
|
|
smk_free(buffer);
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* rewind to first frame and unpack */
|
|
char smk_first(smk s)
|
|
{
|
|
smk_null_check(s);
|
|
|
|
s->cur_frame = 0;
|
|
if ( smk_render(s) < 0)
|
|
{
|
|
fprintf(stderr,"libsmacker::smk_first(s) - Warning: frame %lu: smk_render returned errors.\n",s->cur_frame);
|
|
goto error;
|
|
}
|
|
|
|
if (s->f == 1) return SMK_LAST;
|
|
return SMK_MORE;
|
|
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
/* advance to next frame */
|
|
char smk_next(smk s)
|
|
{
|
|
smk_null_check(s);
|
|
|
|
if (s->cur_frame + 1 < (s->f + s->ring_frame))
|
|
{
|
|
s->cur_frame ++;
|
|
if ( smk_render(s) < 0)
|
|
{
|
|
fprintf(stderr,"libsmacker::smk_next(s) - Warning: frame %lu: smk_render returned errors.\n",s->cur_frame);
|
|
goto error;
|
|
}
|
|
if (s->cur_frame + 1 == (s->f + s->ring_frame))
|
|
{
|
|
return SMK_LAST;
|
|
}
|
|
return SMK_MORE;
|
|
}
|
|
else if (s->ring_frame)
|
|
{
|
|
s->cur_frame = 1;
|
|
if ( smk_render(s) < 0)
|
|
{
|
|
fprintf(stderr,"libsmacker::smk_next(s) - Warning: frame %lu: smk_render returned errors.\n",s->cur_frame);
|
|
goto error;
|
|
}
|
|
if (s->cur_frame + 1 == (s->f + s->ring_frame))
|
|
{
|
|
return SMK_LAST;
|
|
}
|
|
return SMK_MORE;
|
|
}
|
|
return SMK_DONE;
|
|
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
/* seek to a keyframe in an smk */
|
|
char smk_seek_keyframe(smk s, unsigned long f)
|
|
{
|
|
smk_null_check(s);
|
|
|
|
/* rewind (or fast forward!) exactly to f */
|
|
s->cur_frame = f;
|
|
|
|
/* roll back to previous keyframe in stream, or 0 if no keyframes exist */
|
|
while (s->cur_frame > 0 && !(s->keyframe[s->cur_frame]))
|
|
{
|
|
s->cur_frame --;
|
|
}
|
|
|
|
/* render the frame: we're ready */
|
|
if ( smk_render(s) < 0)
|
|
{
|
|
fprintf(stderr,"libsmacker::smk_seek_keyframe(s,%lu) - Warning: frame %lu: smk_render returned errors.\n",f,s->cur_frame);
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
/* jump to and render a specific frame */
|
|
char smk_render_frame(smk s, unsigned long f)
|
|
{
|
|
smk_null_check(s);
|
|
|
|
/* rewind (or fast forward!) exactly to f */
|
|
s->cur_frame = f;
|
|
|
|
/* render the frame: we're ready */
|
|
if ( smk_render(s) < 0)
|
|
{
|
|
fprintf(stderr,"libsmacker::smk_render_frame(s,%lu) - Warning: frame %lu: smk_render returned errors.\n",f,s->cur_frame);
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
return -1;
|
|
}
|