From 150c9823e71a161e97003849cf8b2f55b21520bd Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Mon, 26 Aug 2013 15:10:18 +0100
Subject: adding ffmpeg specific version

---
 ffmpeg1/tools/cws2fws.c | 145 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 ffmpeg1/tools/cws2fws.c

(limited to 'ffmpeg1/tools/cws2fws.c')

diff --git a/ffmpeg1/tools/cws2fws.c b/ffmpeg1/tools/cws2fws.c
new file mode 100644
index 0000000..84feda9
--- /dev/null
+++ b/ffmpeg1/tools/cws2fws.c
@@ -0,0 +1,145 @@
+/*
+ * cws2fws by Alex Beregszaszi
+ * This file is placed in the public domain.
+ * Use the program however you see fit.
+ *
+ * This utility converts compressed Macromedia Flash files to uncompressed ones.
+ */
+
+#include "config.h"
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_IO_H
+#include <io.h>
+#endif
+#include <zlib.h>
+
+#ifdef DEBUG
+#define dbgprintf printf
+#else
+#define dbgprintf(...)
+#endif
+
+int main(int argc, char *argv[])
+{
+    int fd_in, fd_out, comp_len, uncomp_len, i, last_out;
+    char buf_in[1024], buf_out[65536];
+    z_stream zstream;
+    struct stat statbuf;
+
+    if (argc < 3) {
+        printf("Usage: %s <infile.swf> <outfile.swf>\n", argv[0]);
+        return 1;
+    }
+
+    fd_in = open(argv[1], O_RDONLY);
+    if (fd_in < 0) {
+        perror("Error opening input file");
+        return 1;
+    }
+
+    fd_out = open(argv[2], O_WRONLY | O_CREAT, 00644);
+    if (fd_out < 0) {
+        perror("Error opening output file");
+        close(fd_in);
+        return 1;
+    }
+
+    if (read(fd_in, &buf_in, 8) != 8) {
+        printf("Header error\n");
+        close(fd_in);
+        close(fd_out);
+        return 1;
+    }
+
+    if (buf_in[0] != 'C' || buf_in[1] != 'W' || buf_in[2] != 'S') {
+        printf("Not a compressed flash file\n");
+        return 1;
+    }
+
+    if (fstat(fd_in, &statbuf) < 0) {
+        perror("fstat failed");
+        return 1;
+    }
+    comp_len   = statbuf.st_size;
+    uncomp_len = buf_in[4] | (buf_in[5] << 8) | (buf_in[6] << 16) | (buf_in[7] << 24);
+
+    printf("Compressed size: %d Uncompressed size: %d\n",
+           comp_len - 4, uncomp_len - 4);
+
+    // write out modified header
+    buf_in[0] = 'F';
+    if (write(fd_out, &buf_in, 8) < 8) {
+        perror("Error writing output file");
+        return 1;
+    }
+
+    zstream.zalloc = NULL;
+    zstream.zfree  = NULL;
+    zstream.opaque = NULL;
+    if (inflateInit(&zstream) != Z_OK) {
+        fprintf(stderr, "inflateInit failed\n");
+        return 1;
+    }
+
+    for (i = 0; i < comp_len - 8;) {
+        int ret, len = read(fd_in, &buf_in, 1024);
+
+        dbgprintf("read %d bytes\n", len);
+
+        last_out = zstream.total_out;
+
+        zstream.next_in   = &buf_in[0];
+        zstream.avail_in  = len;
+        zstream.next_out  = &buf_out[0];
+        zstream.avail_out = 65536;
+
+        ret = inflate(&zstream, Z_SYNC_FLUSH);
+        if (ret != Z_STREAM_END && ret != Z_OK) {
+            printf("Error while decompressing: %d\n", ret);
+            inflateEnd(&zstream);
+            return 1;
+        }
+
+        dbgprintf("a_in: %d t_in: %lu a_out: %d t_out: %lu -- %lu out\n",
+                  zstream.avail_in, zstream.total_in, zstream.avail_out,
+                  zstream.total_out, zstream.total_out - last_out);
+
+        if (write(fd_out, &buf_out, zstream.total_out - last_out) <
+            zstream.total_out - last_out) {
+            perror("Error writing output file");
+            return 1;
+        }
+
+        i += len;
+
+        if (ret == Z_STREAM_END || ret == Z_BUF_ERROR)
+            break;
+    }
+
+    if (zstream.total_out != uncomp_len - 8) {
+        printf("Size mismatch (%lu != %d), updating header...\n",
+               zstream.total_out, uncomp_len - 8);
+
+        buf_in[0] =  (zstream.total_out + 8)        & 0xff;
+        buf_in[1] = ((zstream.total_out + 8) >>  8) & 0xff;
+        buf_in[2] = ((zstream.total_out + 8) >> 16) & 0xff;
+        buf_in[3] = ((zstream.total_out + 8) >> 24) & 0xff;
+
+        if (   lseek(fd_out, 4, SEEK_SET) < 0
+            || write(fd_out, &buf_in, 4) < 4) {
+            perror("Error writing output file");
+            return 1;
+        }
+    }
+
+    inflateEnd(&zstream);
+    close(fd_in);
+    close(fd_out);
+    return 0;
+}
-- 
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