mov_chan: Pass a separate AVIOContext for reading

[ffmpeg] / libavutil / base64.c

diff --git a/libavutil/base64.c b/libavutil/base64.c
index 91a5d23005ddc1476d3991925910d99c21f29cf6..73872b8c997e892bacd2c8a5e452297cd8f909b7 100644 (file)
--- a/libavutil/base64.c
+++ b/libavutil/base64.c
@@ -1,25 +1,25 @@
 /*
  * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**
- * @file libavutil/base64.c
+ * @file
  * @brief Base64 encode/decode
  * @author Ryan Martell <rdm4@martellventures.com> (with lots of Michael)
  */
@@ -42,7 +42,7 @@ static const uint8_t map2[] =
     0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33
 };
 
-int av_base64_decode(uint8_t * out, const char *in, int out_length)
+int av_base64_decode(uint8_t *out, const char *in, int out_size)
 {
     int i, v;
     uint8_t *dst = out;
@@ -54,7 +54,7 @@ int av_base64_decode(uint8_t * out, const char *in, int out_length)
             return -1;
         v = (v << 6) + map2[index];
         if (i & 3) {
-            if (dst - out < out_length) {
+            if (dst - out < out_size) {
                 *dst++ = v >> (6 - 2 * (i & 3));
             }
         }
@@ -69,21 +69,21 @@ int av_base64_decode(uint8_t * out, const char *in, int out_length)
 * Fixed edge cases and made it work from data (vs. strings) by Ryan.
 *****************************************************************************/
 
-char *av_base64_encode(char * buf, int buf_len, const uint8_t * src, int len)
+char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size)
 {
     static const char b64[] =
         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
     char *ret, *dst;
     unsigned i_bits = 0;
     int i_shift = 0;
-    int bytes_remaining = len;
+    int bytes_remaining = in_size;
 
-    if (len >= UINT_MAX / 4 ||
-        buf_len < len * 4 / 3 + 12)
+    if (in_size >= UINT_MAX / 4 ||
+        out_size < AV_BASE64_SIZE(in_size))
         return NULL;
-    ret = dst = buf;
+    ret = dst = out;
     while (bytes_remaining) {
-        i_bits = (i_bits << 8) + *src++;
+        i_bits = (i_bits << 8) + *in++;
         bytes_remaining--;
         i_shift += 8;
 
@@ -98,3 +98,67 @@ char *av_base64_encode(char * buf, int buf_len, const uint8_t * src, int len)
 
     return ret;
 }
+
+#ifdef TEST
+
+#undef printf
+
+#define MAX_DATA_SIZE    1024
+#define MAX_ENCODED_SIZE 2048
+
+static int test_encode_decode(const uint8_t *data, unsigned int data_size,
+                              const char *encoded_ref)
+{
+    char  encoded[MAX_ENCODED_SIZE];
+    uint8_t data2[MAX_DATA_SIZE];
+    int data2_size, max_data2_size = MAX_DATA_SIZE;
+
+    if (!av_base64_encode(encoded, MAX_ENCODED_SIZE, data, data_size)) {
+        printf("Failed: cannot encode the input data\n");
+        return 1;
+    }
+    if (encoded_ref && strcmp(encoded, encoded_ref)) {
+        printf("Failed: encoded string differs from reference\n"
+               "Encoded:\n%s\nReference:\n%s\n", encoded, encoded_ref);
+        return 1;
+    }
+
+    if ((data2_size = av_base64_decode(data2, encoded, max_data2_size)) < 0) {
+        printf("Failed: cannot decode the encoded string\n"
+               "Encoded:\n%s\n", encoded);
+        return 1;
+    }
+    if (memcmp(data2, data, data_size)) {
+        printf("Failed: encoded/decoded data differs from original data\n");
+        return 1;
+    }
+
+    printf("Passed!\n");
+    return 0;
+}
+
+int main(void)
+{
+    int i, error_count = 0;
+    struct test {
+        const uint8_t *data;
+        const char *encoded_ref;
+    } tests[] = {
+        { "",        ""},
+        { "1",       "MQ=="},
+        { "22",      "MjI="},
+        { "333",     "MzMz"},
+        { "4444",    "NDQ0NA=="},
+        { "55555",   "NTU1NTU="},
+        { "666666",  "NjY2NjY2"},
+        { "abc:def", "YWJjOmRlZg=="},
+    };
+
+    printf("Encoding/decoding tests\n");
+    for (i = 0; i < FF_ARRAY_ELEMS(tests); i++)
+        error_count += test_encode_decode(tests[i].data, strlen(tests[i].data), tests[i].encoded_ref);
+
+    return error_count;
+}
+
+#endif