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-rw-r--r--media/ffvpx/libavutil/base64.c181
1 files changed, 181 insertions, 0 deletions
diff --git a/media/ffvpx/libavutil/base64.c b/media/ffvpx/libavutil/base64.c
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index 0000000000..3e66f4fcbe
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+++ b/media/ffvpx/libavutil/base64.c
@@ -0,0 +1,181 @@
+/*
+ * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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,
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @brief Base64 encode/decode
+ * @author Ryan Martell <rdm4@martellventures.com> (with lots of Michael)
+ */
+
+#include <limits.h>
+#include <stddef.h>
+
+#include "base64.h"
+#include "error.h"
+#include "intreadwrite.h"
+
+/* ---------------- private code */
+static const uint8_t map2[256] =
+{
+ 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff,
+
+ 0x3e, 0xff, 0xff, 0xff, 0x3f, 0x34, 0x35, 0x36,
+ 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff,
+ 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, 0x00, 0x01,
+ 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
+ 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
+ 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1a, 0x1b,
+ 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
+ 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
+ 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33,
+
+ 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+};
+
+#define BASE64_DEC_STEP(i) do { \
+ bits = map2[in[i]]; \
+ if (bits & 0x80) \
+ goto out ## i; \
+ v = i ? (v << 6) + bits : bits; \
+} while(0)
+
+int av_base64_decode(uint8_t *out, const char *in_str, int out_size)
+{
+ uint8_t *dst = out;
+ uint8_t *end;
+ // no sign extension
+ const uint8_t *in = in_str;
+ unsigned bits = 0xff;
+ unsigned v;
+
+ if (!out)
+ goto validity_check;
+
+ end = out + out_size;
+ while (end - dst > 3) {
+ BASE64_DEC_STEP(0);
+ BASE64_DEC_STEP(1);
+ BASE64_DEC_STEP(2);
+ BASE64_DEC_STEP(3);
+ // Using AV_WB32 directly confuses compiler
+ v = av_be2ne32(v << 8);
+ AV_WN32(dst, v);
+ dst += 3;
+ in += 4;
+ }
+ if (end - dst) {
+ BASE64_DEC_STEP(0);
+ BASE64_DEC_STEP(1);
+ BASE64_DEC_STEP(2);
+ BASE64_DEC_STEP(3);
+ *dst++ = v >> 16;
+ if (end - dst)
+ *dst++ = v >> 8;
+ if (end - dst)
+ *dst++ = v;
+ in += 4;
+ }
+validity_check:
+ while (1) {
+ BASE64_DEC_STEP(0);
+ in++;
+ BASE64_DEC_STEP(0);
+ in++;
+ BASE64_DEC_STEP(0);
+ in++;
+ BASE64_DEC_STEP(0);
+ in++;
+ }
+
+out3:
+ *dst++ = v >> 10;
+ v <<= 2;
+out2:
+ *dst++ = v >> 4;
+out1:
+out0:
+ return bits & 1 ? AVERROR_INVALIDDATA : out ? dst - out : 0;
+}
+
+/*****************************************************************************
+* b64_encode: Stolen from VLC's http.c.
+* Simplified by Michael.
+* Fixed edge cases and made it work from data (vs. strings) by Ryan.
+*****************************************************************************/
+
+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 = in_size;
+
+ if (in_size >= UINT_MAX / 4 ||
+ out_size < AV_BASE64_SIZE(in_size))
+ return NULL;
+ ret = dst = out;
+ while (bytes_remaining > 3) {
+ i_bits = AV_RB32(in);
+ in += 3; bytes_remaining -= 3;
+ *dst++ = b64[ i_bits>>26 ];
+ *dst++ = b64[(i_bits>>20) & 0x3F];
+ *dst++ = b64[(i_bits>>14) & 0x3F];
+ *dst++ = b64[(i_bits>>8 ) & 0x3F];
+ }
+ i_bits = 0;
+ while (bytes_remaining) {
+ i_bits = (i_bits << 8) + *in++;
+ bytes_remaining--;
+ i_shift += 8;
+ }
+ while (i_shift > 0) {
+ *dst++ = b64[(i_bits << 6 >> i_shift) & 0x3f];
+ i_shift -= 6;
+ }
+ while ((dst - ret) & 3)
+ *dst++ = '=';
+ *dst = '\0';
+
+ return ret;
+}