mirror of
https://github.com/ossrs/srs.git
synced 2025-03-09 15:49:59 +00:00
for #133, rtsp parse the announce packet, parse the sps/pps and audio sequence header by base64.
This commit is contained in:
winlin
parent
604f4cc57b
commit
4807f7850d
5 changed files with 729 additions and 13 deletions
|
|
@ -407,3 +407,217 @@ u_int32_t srs_crc32(const void* buf, int size)
|
|||
return mpegts_crc32((const u_int8_t*)buf, size);
|
||||
}
|
||||
|
||||
/*
|
||||
* 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
|
||||
*/
|
||||
|
||||
#define UINT_MAX 0xffffffff
|
||||
|
||||
#ifndef AV_RB32
|
||||
# define AV_RB32(x) \
|
||||
(((uint32_t)((const u_int8_t*)(x))[0] << 24) | \
|
||||
(((const u_int8_t*)(x))[1] << 16) | \
|
||||
(((const u_int8_t*)(x))[2] << 8) | \
|
||||
((const u_int8_t*)(x))[3])
|
||||
#endif
|
||||
|
||||
#ifndef AV_WL32
|
||||
# define AV_WL32(p, darg) do { \
|
||||
unsigned d = (darg); \
|
||||
((u_int8_t*)(p))[0] = (d); \
|
||||
((u_int8_t*)(p))[1] = (d)>>8; \
|
||||
((u_int8_t*)(p))[2] = (d)>>16; \
|
||||
((u_int8_t*)(p))[3] = (d)>>24; \
|
||||
} while(0)
|
||||
#endif
|
||||
|
||||
# define AV_WN(s, p, v) AV_WL##s(p, v)
|
||||
|
||||
# if defined(AV_WN32) && !defined(AV_WL32)
|
||||
# define AV_WL32(p, v) AV_WN32(p, v)
|
||||
# elif !defined(AV_WN32) && defined(AV_WL32)
|
||||
# define AV_WN32(p, v) AV_WL32(p, v)
|
||||
# endif
|
||||
|
||||
#ifndef AV_WN32
|
||||
# define AV_WN32(p, v) AV_WN(32, p, v)
|
||||
#endif
|
||||
|
||||
#define AV_BSWAP16C(x) (((x) << 8 & 0xff00) | ((x) >> 8 & 0x00ff))
|
||||
#define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16))
|
||||
|
||||
#ifndef av_bswap32
|
||||
static const u_int32_t av_bswap32(u_int32_t x)
|
||||
{
|
||||
return AV_BSWAP32C(x);
|
||||
}
|
||||
#endif
|
||||
|
||||
#define av_be2ne32(x) av_bswap32(x)
|
||||
|
||||
/**
|
||||
* @file
|
||||
* @brief Base64 encode/decode
|
||||
* @author Ryan Martell <rdm4@martellventures.com> (with lots of Michael)
|
||||
*/
|
||||
|
||||
/* ---------------- private code */
|
||||
static const u_int8_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 srs_av_base64_decode(u_int8_t* out, const char* in_str, int out_size)
|
||||
{
|
||||
u_int8_t *dst = out;
|
||||
u_int8_t *end = out + out_size;
|
||||
// no sign extension
|
||||
const u_int8_t *in = (const u_int8_t*)in_str;
|
||||
unsigned bits = 0xff;
|
||||
unsigned v;
|
||||
|
||||
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;
|
||||
}
|
||||
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 ? -1 : dst - out;
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* 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* srs_av_base64_encode(char* out, int out_size, const u_int8_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 >= (int)(UINT_MAX / 4) ||
|
||||
out_size < SRS_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;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue