-#define READER_TYPE_FILE 0
-#define READER_TYPE_MEM 1
-#define READER_TYPE_ZLIB 2
-#define WRITER_TYPE_FILE 0
-#define WRITER_TYPE_MEM 1
-#define WRITER_TYPE_ZLIB 2
-
-struct reader_t
-{
- int (*read)(struct reader_t*, void*data, int len);
- void *internal;
- int type;
- unsigned char mybyte;
- unsigned char bitpos;
-};
-struct writer_t
+/* bitio.c
+ part of swftools
+ implementation of bitio.h.
+
+ Copyright (C) 2003 Matthias Kramm <kramm@quiss.org>
+
+ This program 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.
+
+ This program 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 <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <memory.h>
+#include <fcntl.h>
+
+#include "../config.h"
+
+#ifdef HAVE_ZLIB
+#include <zlib.h>
+#define ZLIB_BUFFER_SIZE 16384
+#endif
+#include "./bitio.h"
+
+/* ---------------------------- file reader ------------------------------- */
+
+static int reader_fileread(struct reader_t*reader, void* data, int len)
{
- int (*write)(struct writer_t*, void*data, int len);
- void *internal;
- int type;
- unsigned char mybyte;
- unsigned char bitpos;
+ int ret = read((int)reader->internal, data, len);
+ if(ret>=0)
+ reader->pos += ret;
+ return ret;
+}
+void reader_init_filereader(struct reader_t*r, int handle)
+{
+ r->read = reader_fileread;
+ r->internal = (void*)handle;
+ r->type = READER_TYPE_FILE;
+ r->mybyte = 0;
+ r->bitpos = 8;
+ r->pos = 0;
+}
+
+/* ---------------------------- mem reader ------------------------------- */
+
+struct memread_t
+{
+ unsigned char*data;
+ int length;
};
-static int reader_fileread(struct reader_t*reader, void* data, int len)
+static int reader_memread(struct reader_t*reader, void* data, int len)
{
- return read((int)reader->internal, data, len);
+ struct memread_t*mr = (struct memread_t*)reader->internal;
+
+ if(mr->length - reader->pos > len) {
+ memcpy(data, &mr->data[reader->pos], len);
+ reader->pos += len;
+ return len;
+ } else {
+ memcpy(data, &mr->data[reader->pos], mr->length - reader->pos);
+ reader->pos = mr->length;
+ return mr->length - reader->pos;
+ }
}
-static void reader_resetbits(struct reader_t*r)
+void reader_init_memreader(struct reader_t*r, void*newdata, int newlength)
{
+ struct memread_t*mr = malloc(sizeof(struct memread_t));
+ mr->data = newdata;
+ mr->length = newlength;
+ r->read = reader_memread;
+ r->internal = (void*)mr;
+ r->type = READER_TYPE_MEM;
r->mybyte = 0;
r->bitpos = 8;
+ r->pos = 0;
+}
+
+/* ---------------------------- mem writer ------------------------------- */
+
+struct memwrite_t
+{
+ unsigned char*data;
+ int length;
+};
+
+static int writer_memwrite_write(struct writer_t*w, void* data, int len)
+{
+ struct memread_t*mw = (struct memread_t*)w->internal;
+ if(mw->length - w->pos > len) {
+ memcpy(&mw->data[w->pos], data, len);
+ w->pos += len;
+ return len;
+ } else {
+ memcpy(&mw->data[w->pos], data, mw->length - w->pos);
+ w->pos = mw->length;
+ return mw->length - w->pos;
+ }
}
-static void reader_init_filereader(struct reader_t*r, int handle)
+static void writer_memwrite_finish(struct writer_t*w)
{
- r->read = reader_fileread;
- r->internal = (void*)handle;
- r->type = READER_TYPE_FILE;
- reader_resetbits(r);
+ free(w->internal);
}
-#define ZLIB_BUFFER_SIZE 16384
+void writer_init_memwriter(struct writer_t*w, void*data, int len)
+{
+ struct memwrite_t *mr;
+ mr = malloc(sizeof(struct memwrite_t));
+ mr->data = data;
+ mr->length = len;
+ memset(w, 0, sizeof(struct writer_t));
+ w->write = writer_memwrite_write;
+ w->finish = writer_memwrite_finish;
+ w->internal = (void*)mr;
+ w->type = WRITER_TYPE_FILE;
+ w->bitpos = 0;
+ w->mybyte = 0;
+ w->pos = 0;
+}
+
+/* ---------------------------- file writer ------------------------------- */
+
+struct filewrite_t
+{
+ int handle;
+ char free_handle;
+};
+
+static int writer_filewrite_write(struct writer_t*w, void* data, int len)
+{
+ struct filewrite_t * fw= (struct filewrite_t*)w->internal;
+ return write(fw->handle, data, len);
+}
+static void writer_filewrite_finish(struct writer_t*w)
+{
+ struct filewrite_t *mr = (struct filewrite_t*)w->internal;
+ if(mr->free_handle)
+ close(mr->handle);
+ free(mr);
+}
+void writer_init_filewriter(struct writer_t*w, int handle)
+{
+ struct filewrite_t *mr = malloc(sizeof(struct filewrite_t));
+ mr->handle = handle;
+ mr->free_handle = 0;
+ memset(w, 0, sizeof(struct writer_t));
+ w->write = writer_filewrite_write;
+ w->finish = writer_filewrite_finish;
+ w->internal = mr;
+ w->type = WRITER_TYPE_FILE;
+ w->bitpos = 0;
+ w->mybyte = 0;
+ w->pos = 0;
+}
+void writer_init_filewriter2(struct writer_t*w, char*filename)
+{
+ int fi = open("movie.swf",
+#ifdef O_BINARY
+ O_BINARY|
+#endif
+ O_WRONLY|O_CREAT|O_TRUNC, 0644);
+ writer_init_filewriter(w, fi);
+ ((struct filewrite_t*)w->internal)->free_handle = 1;
+}
+
+/* ---------------------------- null writer ------------------------------- */
+
+static int writer_nullwrite_write(struct writer_t*w, void* data, int len)
+{
+ return len;
+}
+static void writer_nullwrite_finish(struct writer_t*w)
+{
+}
+void writer_init_nullwriter(struct writer_t*w)
+{
+ memset(w, 0, sizeof(struct writer_t));
+ w->write = writer_nullwrite_write;
+ w->finish = writer_nullwrite_finish;
+ w->internal = 0;
+ w->type = WRITER_TYPE_NULL;
+ w->bitpos = 0;
+ w->mybyte = 0;
+ w->pos = 0;
+}
+/* ---------------------------- zlibinflate writer -------------------------- */
+
struct zlibinflate_t
{
+#ifdef HAVE_ZLIB
z_stream zs;
struct reader_t*input;
- U8 readbuffer[ZLIB_BUFFER_SIZE];
+ unsigned char readbuffer[ZLIB_BUFFER_SIZE];
+#endif
};
+
+#ifdef HAVE_ZLIB
static void zlib_error(int ret, char* msg, z_stream*zs)
{
fprintf(stderr, "%s: zlib error (%d): last zlib error: %s\n",
perror("errno:");
exit(1);
}
-static int reader_zlibinflate(struct reader_t*reader, void* data, int len);
-static void reader_init_zlibinflate(struct reader_t*r, struct reader_t*input)
-{
- struct zlibinflate_t*z;
- int ret;
- z = (struct zlibinflate_t*)malloc(sizeof(struct zlibinflate_t));
- r->internal = z;
- r->read = reader_zlibinflate;
- r->type = READER_TYPE_ZLIB;
- z->input = input;
- memset(&z->zs,0,sizeof(z_stream));
- z->zs.zalloc = Z_NULL;
- z->zs.zfree = Z_NULL;
- z->zs.opaque = Z_NULL;
- ret = inflateInit(&z->zs);
- if (ret != Z_OK) zlib_error(ret, "bitio:inflate_init", &z->zs);
- reader_resetbits(r);
-}
+#endif
+
static int reader_zlibinflate(struct reader_t*reader, void* data, int len)
{
+#ifdef HAVE_ZLIB
struct zlibinflate_t*z = (struct zlibinflate_t*)reader->internal;
int ret;
- if(!z)
+ if(!z) {
+ return 0;
+ }
+ if(!len)
return 0;
z->zs.next_out = data;
if (ret != Z_OK) zlib_error(ret, "bitio:inflate_end", &z->zs);
free(reader->internal);
reader->internal = 0;
+ reader->pos += pos;
return pos;
}
if(!z->zs.avail_out) {
break;
}
}
+ reader->pos += len;
return len;
+#else
+ fprintf(stderr, "Error: swftools was compiled without zlib support");
+ exit(1);
+#endif
}
-static unsigned int reader_readbit(struct reader_t*r)
+void reader_init_zlibinflate(struct reader_t*r, struct reader_t*input)
{
- if(r->bitpos==8)
- {
- r->bitpos=0;
- r->read(r, &r->mybyte, 1);
- }
- return (r->mybyte>>(7-r->bitpos++))&1;
+#ifdef HAVE_ZLIB
+ struct zlibinflate_t*z;
+ int ret;
+ memset(r, 0, sizeof(struct reader_t));
+ z = (struct zlibinflate_t*)malloc(sizeof(struct zlibinflate_t));
+ memset(z, 0, sizeof(struct zlibinflate_t));
+ r->internal = z;
+ r->read = reader_zlibinflate;
+ r->type = READER_TYPE_ZLIB;
+ r->pos = 0;
+ z->input = input;
+ memset(&z->zs,0,sizeof(z_stream));
+ z->zs.zalloc = Z_NULL;
+ z->zs.zfree = Z_NULL;
+ z->zs.opaque = Z_NULL;
+ ret = inflateInit(&z->zs);
+ if (ret != Z_OK) zlib_error(ret, "bitio:inflate_init", &z->zs);
+ reader_resetbits(r);
+#else
+ fprintf(stderr, "Error: swftools was compiled without zlib support");
+#endif
}
-static unsigned int reader_readbits(struct reader_t*r, int num)
+
+/* ---------------------------- zlibdeflate writer -------------------------- */
+
+struct zlibdeflate_t
{
- int t;
- int val = 0;
- for(t=0;t<num;t++)
- {
- val<<=1;
- val|=reader_readbit(r);
- }
- return val;
-}
-static int writer_filewrite(struct writer_t*w, void* data, int len)
+#ifdef HAVE_ZLIB
+ z_stream zs;
+ struct writer_t*output;
+ unsigned char writebuffer[ZLIB_BUFFER_SIZE];
+#endif
+};
+
+static int writer_zlibdeflate_write(struct writer_t*writer, void* data, int len)
{
- return write((int)w->internal, data, len);
+#ifdef HAVE_ZLIB
+ struct zlibdeflate_t*z = (struct zlibdeflate_t*)writer->internal;
+ int ret;
+ if(!z) {
+ fprintf(stderr, "zlib not initialized!\n");
+ return 0;
+ }
+ if(!len)
+ return 0;
+
+ z->zs.next_in = data;
+ z->zs.avail_in = len;
+
+ while(1) {
+ ret = deflate(&z->zs, Z_NO_FLUSH);
+
+ if (ret != Z_OK) zlib_error(ret, "bitio:deflate_deflate", &z->zs);
+
+ if(z->zs.next_out != z->writebuffer) {
+ z->output->write(z->output, z->writebuffer, z->zs.next_out - (Bytef*)z->writebuffer);
+ z->zs.next_out = z->writebuffer;
+ z->zs.avail_out = ZLIB_BUFFER_SIZE;
+ }
+
+ if(!z->zs.avail_in) {
+ break;
+ }
+ }
+ writer->pos += len;
+ return len;
+#else
+ fprintf(stderr, "Error: swftools was compiled without zlib support");
+ exit(1);
+#endif
}
-static void writer_resetbits(struct writer_t*w)
+static void writer_zlibdeflate_finish(struct writer_t*writer)
{
- if(w->bitpos)
- w->write(w, &w->mybyte, 1);
- w->bitpos = 0;
- w->mybyte = 0;
+#ifdef HAVE_ZLIB
+ struct zlibdeflate_t*z = (struct zlibdeflate_t*)writer->internal;
+ struct writer_t*output;
+ int ret;
+ if(!z)
+ return;
+ output= z->output;
+ while(1) {
+ ret = deflate(&z->zs, Z_FINISH);
+ if (ret != Z_OK &&
+ ret != Z_STREAM_END) zlib_error(ret, "bitio:deflate_finish", &z->zs);
+
+ if(z->zs.next_out != z->writebuffer) {
+ z->output->write(z->output, z->writebuffer, z->zs.next_out - (Bytef*)z->writebuffer);
+ z->zs.next_out = z->writebuffer;
+ z->zs.avail_out = ZLIB_BUFFER_SIZE;
+ }
+
+ if (ret == Z_STREAM_END) {
+ break;
+
+ }
+ }
+ ret = deflateEnd(&z->zs);
+ if (ret != Z_OK) zlib_error(ret, "bitio:deflate_end", &z->zs);
+ free(writer->internal);
+ writer->internal = 0;
+ output->finish(output);
+#else
+ fprintf(stderr, "Error: swftools was compiled without zlib support");
+ exit(1);
+#endif
}
-static void writer_init_filewriter(struct writer_t*w, int handle)
+void writer_init_zlibdeflate(struct writer_t*w, struct writer_t*output)
{
- w->write = writer_filewrite;
- w->internal = (void*)handle;
- w->type = WRITER_TYPE_FILE;
+#ifdef HAVE_ZLIB
+ struct zlibdeflate_t*z;
+ int ret;
+ memset(w, 0, sizeof(struct writer_t));
+ z = (struct zlibdeflate_t*)malloc(sizeof(struct zlibdeflate_t));
+ memset(z, 0, sizeof(struct zlibdeflate_t));
+ w->internal = z;
+ w->write = writer_zlibdeflate_write;
+ w->finish = writer_zlibdeflate_finish;
+ w->type = WRITER_TYPE_ZLIB;
+ w->pos = 0;
+ z->output = output;
+ memset(&z->zs,0,sizeof(z_stream));
+ z->zs.zalloc = Z_NULL;
+ z->zs.zfree = Z_NULL;
+ z->zs.opaque = Z_NULL;
+ ret = deflateInit(&z->zs, 9);
+ if (ret != Z_OK) zlib_error(ret, "bitio:deflate_init", &z->zs);
w->bitpos = 0;
w->mybyte = 0;
+ z->zs.next_out = z->writebuffer;
+ z->zs.avail_out = ZLIB_BUFFER_SIZE;
+#else
+ fprintf(stderr, "Error: swftools was compiled without zlib support");
+ exit(1);
+#endif
}
-static void writer_writebit(struct writer_t*w, int bit)
+
+/* ----------------------- bit handling routines -------------------------- */
+
+void writer_writebit(struct writer_t*w, int bit)
{
if(w->bitpos==8)
{
w->mybyte |= 1 << (7 - w->bitpos);
w->bitpos ++;
}
-static void writer_writebits(struct writer_t*w, U32 data, int bits)
+void writer_writebits(struct writer_t*w, unsigned int data, int bits)
{
int t;
for(t=0;t<bits;t++)
writer_writebit(w, (data >> (bits-t-1))&1);
}
}
+void writer_resetbits(struct writer_t*w)
+{
+ if(w->bitpos)
+ w->write(w, &w->mybyte, 1);
+ w->bitpos = 0;
+ w->mybyte = 0;
+}
+
+unsigned int reader_readbit(struct reader_t*r)
+{
+ if(r->bitpos==8)
+ {
+ r->bitpos=0;
+ r->read(r, &r->mybyte, 1);
+ }
+ return (r->mybyte>>(7-r->bitpos++))&1;
+}
+unsigned int reader_readbits(struct reader_t*r, int num)
+{
+ int t;
+ int val = 0;
+ for(t=0;t<num;t++)
+ {
+ val<<=1;
+ val|=reader_readbit(r);
+ }
+ return val;
+}
+void reader_resetbits(struct reader_t*r)
+{
+ r->mybyte = 0;
+ r->bitpos = 8;
+
+}
git.asbjorn.biz / swftools.git / blobdiff