The rest of rtsp input plugin; sorry.

CVS patchset: 3496
CVS date: 2002/12/12 22:14:53

1 files changed, 951 insertions, 0 deletions

diff --git a/src/input/libreal/real.c b/src/input/libreal/real.c
new file mode 100644
index 000000000..344526864
--- /dev/null
+++ b/src/input/libreal/real.c
@@ -0,0 +1,951 @@
+/*
+ * Copyright (C) 2002 the xine project
+ *
+ * This file is part of xine, a free video player.
+ *
+ * xine 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.
+ *
+ * xine 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
+ *
+ * $Id: real.c,v 1.1 2002/12/12 22:14:55 holstsn Exp $
+ *
+ * special functions for real streams.
+ * adopted from joschkas real tools.
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "real.h"
+#include "asmrp.h"
+
+/*
+#define LOG
+*/
+
+const unsigned char xor_table[] = {
+    0x05, 0x18, 0x74, 0xd0, 0x0d, 0x09, 0x02, 0x53,
+    0xc0, 0x01, 0x05, 0x05, 0x67, 0x03, 0x19, 0x70,
+    0x08, 0x27, 0x66, 0x10, 0x10, 0x72, 0x08, 0x09,
+    0x63, 0x11, 0x03, 0x71, 0x08, 0x08, 0x70, 0x02,
+    0x10, 0x57, 0x05, 0x18, 0x54, 0x00, 0x00, 0x00 };
+
+
+#define BE_32C(x,y) x[3]=(char)(y & 0xff);\
+    x[2]=(char)((y >> 8) & 0xff);\
+    x[1]=(char)((y >> 16) & 0xff);\
+    x[0]=(char)((y >> 24) & 0xff);
+
+#define BE_16(x)  ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
+
+#define BE_32(x)  ((((uint8_t*)(x))[0] << 24) | \
+                   (((uint8_t*)(x))[1] << 16) | \
+                   (((uint8_t*)(x))[2] << 8) | \
+                    ((uint8_t*)(x))[3])
+
+#define MAX(x,y) ((x>y) ? x : y)
+
+#ifdef LOG
+static void hexdump (const char *buf, int length) {
+
+  int i;
+
+  printf (" hexdump> ");
+  for (i = 0; i < length; i++) {
+    unsigned char c = buf[i];
+
+    printf ("%02x", c);
+
+    if ((i % 16) == 15)
+      printf ("\n         ");
+
+    if ((i % 2) == 1)
+      printf (" ");
+
+  }
+  printf ("\n");
+}
+#endif
+
+
+static void hash(char *field, char *param) {
+
+  uint32_t a, b, c, d;
+ 
+
+  /* fill variables */
+  memcpy(&a, field, sizeof(uint32_t));
+  memcpy(&b, &field[4], sizeof(uint32_t));
+  memcpy(&c, &field[8], sizeof(uint32_t));
+  memcpy(&d, &field[12], sizeof(uint32_t));
+
+#ifdef LOG
+  printf("real: hash input: %x %x %x %x\n", a, b, c, d);
+  printf("real: hash parameter:\n");
+  hexdump(param, 64);
+#endif
+  
+  a = ((b & c) | (~b & d)) + *((uint32_t*)(param+0x00)) + a - 0x28955B88;
+  a = ((a << 0x07) | (a >> 0x19)) + b;
+  d = ((a & b) | (~a & c)) + *((uint32_t*)(param+0x04)) + d - 0x173848AA;
+  d = ((d << 0x0c) | (d >> 0x14)) + a;
+  c = ((d & a) | (~d & b)) + *((uint32_t*)(param+0x08)) + c + 0x242070DB;
+  c = ((c << 0x11) | (c >> 0x0f)) + d;
+  b = ((c & d) | (~c & a)) + *((uint32_t*)(param+0x0c)) + b - 0x3E423112;
+  b = ((b << 0x16) | (b >> 0x0a)) + c;
+  a = ((b & c) | (~b & d)) + *((uint32_t*)(param+0x10)) + a - 0x0A83F051;
+  a = ((a << 0x07) | (a >> 0x19)) + b;
+  d = ((a & b) | (~a & c)) + *((uint32_t*)(param+0x14)) + d + 0x4787C62A;
+  d = ((d << 0x0c) | (d >> 0x14)) + a;
+  c = ((d & a) | (~d & b)) + *((uint32_t*)(param+0x18)) + c - 0x57CFB9ED;
+  c = ((c << 0x11) | (c >> 0x0f)) + d;
+  b = ((c & d) | (~c & a)) + *((uint32_t*)(param+0x1c)) + b - 0x02B96AFF;
+  b = ((b << 0x16) | (b >> 0x0a)) + c;
+  a = ((b & c) | (~b & d)) + *((uint32_t*)(param+0x20)) + a + 0x698098D8;
+  a = ((a << 0x07) | (a >> 0x19)) + b;
+  d = ((a & b) | (~a & c)) + *((uint32_t*)(param+0x24)) + d - 0x74BB0851;
+  d = ((d << 0x0c) | (d >> 0x14)) + a;
+  c = ((d & a) | (~d & b)) + *((uint32_t*)(param+0x28)) + c - 0x0000A44F;
+  c = ((c << 0x11) | (c >> 0x0f)) + d;
+  b = ((c & d) | (~c & a)) + *((uint32_t*)(param+0x2C)) + b - 0x76A32842;
+  b = ((b << 0x16) | (b >> 0x0a)) + c;
+  a = ((b & c) | (~b & d)) + *((uint32_t*)(param+0x30)) + a + 0x6B901122;
+  a = ((a << 0x07) | (a >> 0x19)) + b;
+  d = ((a & b) | (~a & c)) + *((uint32_t*)(param+0x34)) + d - 0x02678E6D;
+  d = ((d << 0x0c) | (d >> 0x14)) + a;
+  c = ((d & a) | (~d & b)) + *((uint32_t*)(param+0x38)) + c - 0x5986BC72;
+  c = ((c << 0x11) | (c >> 0x0f)) + d;
+  b = ((c & d) | (~c & a)) + *((uint32_t*)(param+0x3c)) + b + 0x49B40821;
+  b = ((b << 0x16) | (b >> 0x0a)) + c;
+  
+  a = ((b & d) | (~d & c)) + *((uint32_t*)(param+0x04)) + a - 0x09E1DA9E;
+  a = ((a << 0x05) | (a >> 0x1b)) + b;
+  d = ((a & c) | (~c & b)) + *((uint32_t*)(param+0x18)) + d - 0x3FBF4CC0;
+  d = ((d << 0x09) | (d >> 0x17)) + a;
+  c = ((d & b) | (~b & a)) + *((uint32_t*)(param+0x2c)) + c + 0x265E5A51;
+  c = ((c << 0x0e) | (c >> 0x12)) + d;
+  b = ((c & a) | (~a & d)) + *((uint32_t*)(param+0x00)) + b - 0x16493856;
+  b = ((b << 0x14) | (b >> 0x0c)) + c;
+  a = ((b & d) | (~d & c)) + *((uint32_t*)(param+0x14)) + a - 0x29D0EFA3;
+  a = ((a << 0x05) | (a >> 0x1b)) + b;
+  d = ((a & c) | (~c & b)) + *((uint32_t*)(param+0x28)) + d + 0x02441453;
+  d = ((d << 0x09) | (d >> 0x17)) + a;
+  c = ((d & b) | (~b & a)) + *((uint32_t*)(param+0x3c)) + c - 0x275E197F;
+  c = ((c << 0x0e) | (c >> 0x12)) + d;
+  b = ((c & a) | (~a & d)) + *((uint32_t*)(param+0x10)) + b - 0x182C0438;
+  b = ((b << 0x14) | (b >> 0x0c)) + c;
+  a = ((b & d) | (~d & c)) + *((uint32_t*)(param+0x24)) + a + 0x21E1CDE6;
+  a = ((a << 0x05) | (a >> 0x1b)) + b;
+  d = ((a & c) | (~c & b)) + *((uint32_t*)(param+0x38)) + d - 0x3CC8F82A;
+  d = ((d << 0x09) | (d >> 0x17)) + a;
+  c = ((d & b) | (~b & a)) + *((uint32_t*)(param+0x0c)) + c - 0x0B2AF279;
+  c = ((c << 0x0e) | (c >> 0x12)) + d;
+  b = ((c & a) | (~a & d)) + *((uint32_t*)(param+0x20)) + b + 0x455A14ED;
+  b = ((b << 0x14) | (b >> 0x0c)) + c;
+  a = ((b & d) | (~d & c)) + *((uint32_t*)(param+0x34)) + a - 0x561C16FB;
+  a = ((a << 0x05) | (a >> 0x1b)) + b;
+  d = ((a & c) | (~c & b)) + *((uint32_t*)(param+0x08)) + d - 0x03105C08;
+  d = ((d << 0x09) | (d >> 0x17)) + a;
+  c = ((d & b) | (~b & a)) + *((uint32_t*)(param+0x1c)) + c + 0x676F02D9;
+  c = ((c << 0x0e) | (c >> 0x12)) + d;
+  b = ((c & a) | (~a & d)) + *((uint32_t*)(param+0x30)) + b - 0x72D5B376;
+  b = ((b << 0x14) | (b >> 0x0c)) + c;
+  
+  a = (b ^ c ^ d) + *((uint32_t*)(param+0x14)) + a - 0x0005C6BE;
+  a = ((a << 0x04) | (a >> 0x1c)) + b;
+  d = (a ^ b ^ c) + *((uint32_t*)(param+0x20)) + d - 0x788E097F;
+  d = ((d << 0x0b) | (d >> 0x15)) + a;
+  c = (d ^ a ^ b) + *((uint32_t*)(param+0x2c)) + c + 0x6D9D6122;
+  c = ((c << 0x10) | (c >> 0x10)) + d;
+  b = (c ^ d ^ a) + *((uint32_t*)(param+0x38)) + b - 0x021AC7F4;
+  b = ((b << 0x17) | (b >> 0x09)) + c;
+  a = (b ^ c ^ d) + *((uint32_t*)(param+0x04)) + a - 0x5B4115BC;
+  a = ((a << 0x04) | (a >> 0x1c)) + b;
+  d = (a ^ b ^ c) + *((uint32_t*)(param+0x10)) + d + 0x4BDECFA9;
+  d = ((d << 0x0b) | (d >> 0x15)) + a;
+  c = (d ^ a ^ b) + *((uint32_t*)(param+0x1c)) + c - 0x0944B4A0;
+  c = ((c << 0x10) | (c >> 0x10)) + d;
+  b = (c ^ d ^ a) + *((uint32_t*)(param+0x28)) + b - 0x41404390;
+  b = ((b << 0x17) | (b >> 0x09)) + c;
+  a = (b ^ c ^ d) + *((uint32_t*)(param+0x34)) + a + 0x289B7EC6;
+  a = ((a << 0x04) | (a >> 0x1c)) + b;
+  d = (a ^ b ^ c) + *((uint32_t*)(param+0x00)) + d - 0x155ED806;
+  d = ((d << 0x0b) | (d >> 0x15)) + a;
+  c = (d ^ a ^ b) + *((uint32_t*)(param+0x0c)) + c - 0x2B10CF7B;
+  c = ((c << 0x10) | (c >> 0x10)) + d;
+  b = (c ^ d ^ a) + *((uint32_t*)(param+0x18)) + b + 0x04881D05;
+  b = ((b << 0x17) | (b >> 0x09)) + c;
+  a = (b ^ c ^ d) + *((uint32_t*)(param+0x24)) + a - 0x262B2FC7;
+  a = ((a << 0x04) | (a >> 0x1c)) + b;
+  d = (a ^ b ^ c) + *((uint32_t*)(param+0x30)) + d - 0x1924661B;
+  d = ((d << 0x0b) | (d >> 0x15)) + a;
+  c = (d ^ a ^ b) + *((uint32_t*)(param+0x3c)) + c + 0x1fa27cf8;
+  c = ((c << 0x10) | (c >> 0x10)) + d;
+  b = (c ^ d ^ a) + *((uint32_t*)(param+0x08)) + b - 0x3B53A99B;
+  b = ((b << 0x17) | (b >> 0x09)) + c;
+  
+  a = ((~d | b) ^ c)  + *((uint32_t*)(param+0x00)) + a - 0x0BD6DDBC;
+  a = ((a << 0x06) | (a >> 0x1a)) + b; 
+  d = ((~c | a) ^ b)  + *((uint32_t*)(param+0x1c)) + d + 0x432AFF97;
+  d = ((d << 0x0a) | (d >> 0x16)) + a; 
+  c = ((~b | d) ^ a)  + *((uint32_t*)(param+0x38)) + c - 0x546BDC59;
+  c = ((c << 0x0f) | (c >> 0x11)) + d; 
+  b = ((~a | c) ^ d)  + *((uint32_t*)(param+0x14)) + b - 0x036C5FC7;
+  b = ((b << 0x15) | (b >> 0x0b)) + c; 
+  a = ((~d | b) ^ c)  + *((uint32_t*)(param+0x30)) + a + 0x655B59C3;
+  a = ((a << 0x06) | (a >> 0x1a)) + b; 
+  d = ((~c | a) ^ b)  + *((uint32_t*)(param+0x0C)) + d - 0x70F3336E;
+  d = ((d << 0x0a) | (d >> 0x16)) + a; 
+  c = ((~b | d) ^ a)  + *((uint32_t*)(param+0x28)) + c - 0x00100B83;
+  c = ((c << 0x0f) | (c >> 0x11)) + d; 
+  b = ((~a | c) ^ d)  + *((uint32_t*)(param+0x04)) + b - 0x7A7BA22F;
+  b = ((b << 0x15) | (b >> 0x0b)) + c; 
+  a = ((~d | b) ^ c)  + *((uint32_t*)(param+0x20)) + a + 0x6FA87E4F;
+  a = ((a << 0x06) | (a >> 0x1a)) + b; 
+  d = ((~c | a) ^ b)  + *((uint32_t*)(param+0x3c)) + d - 0x01D31920;
+  d = ((d << 0x0a) | (d >> 0x16)) + a; 
+  c = ((~b | d) ^ a)  + *((uint32_t*)(param+0x18)) + c - 0x5CFEBCEC;
+  c = ((c << 0x0f) | (c >> 0x11)) + d; 
+  b = ((~a | c) ^ d)  + *((uint32_t*)(param+0x34)) + b + 0x4E0811A1;
+  b = ((b << 0x15) | (b >> 0x0b)) + c; 
+  a = ((~d | b) ^ c)  + *((uint32_t*)(param+0x10)) + a - 0x08AC817E;
+  a = ((a << 0x06) | (a >> 0x1a)) + b; 
+  d = ((~c | a) ^ b)  + *((uint32_t*)(param+0x2c)) + d - 0x42C50DCB;
+  d = ((d << 0x0a) | (d >> 0x16)) + a; 
+  c = ((~b | d) ^ a)  + *((uint32_t*)(param+0x08)) + c + 0x2AD7D2BB;
+  c = ((c << 0x0f) | (c >> 0x11)) + d; 
+  b = ((~a | c) ^ d)  + *((uint32_t*)(param+0x24)) + b - 0x14792C6F;
+  b = ((b << 0x15) | (b >> 0x0b)) + c; 
+
+#ifdef LOG
+  printf("real: hash output: %x %x %x %x\n", a, b, c, d);
+#endif
+  
+  *((uint32_t *)(field+0)) += a;
+  *((uint32_t *)(field+4)) += b;
+  *((uint32_t *)(field+8)) += c;
+  *((uint32_t *)(field+12)) += d;
+}
+
+static void call_hash (char *key, char *challenge, int len) {
+
+  uint32_t *ptr1, *ptr2;
+  uint32_t a, b, c, d;
+  
+  ptr1=(uint32_t*)(key+16);
+  ptr2=(uint32_t*)(key+20);
+  
+  a = *ptr1;
+  b = (a >> 3) & 0x3f;
+  a += len * 8;
+  *ptr1 = a;
+  
+  if (a < (len << 3))
+  {
+#ifdef LOG
+    printf("not verified: (len << 3) > a true\n");
+#endif
+    ptr2 += 4;
+  }
+
+  *ptr2 += (len >> 0x1d);
+  a = 64 - b;
+  c = 0;  
+  if (a <= len)
+  {
+
+    memcpy(key+b+24, challenge, a);
+    hash(key, key+24);
+    c = a;
+    d = c + 0x3f;
+    
+    while ( d < len ) {
+
+#ifdef LOG
+      printf("not verified:  while ( d < len )\n");
+#endif
+      hash(key, challenge+d-0x3f);
+      d += 64;
+      c += 64;
+    }
+    b = 0;
+  }
+  
+  memcpy(key+b+24, challenge+c, len-c);
+}
+
+static void calc_response (char *result, char *field) {
+
+  char buf1[128];
+  char buf2[128];
+  int i;
+
+  memset (buf1, 0, 64);
+  *buf1 = 128;
+  
+  memcpy (buf2, field+16, 8);
+  
+  i = ( *((uint32_t*)(buf2)) >> 3 ) & 0x3f;
+ 
+  if (i < 56) {
+    i = 56 - i;
+  } else {
+#ifdef LOG
+    printf("not verified: ! (i < 56)\n");
+#endif
+    i = 120 - i;
+  }
+
+  call_hash (field, buf1, i);
+  call_hash (field, buf2, 8);
+
+  memcpy (result, field, 16);
+
+}
+
+
+static void calc_response_string (char *result, char *challenge) {
+ 
+  char field[128];
+  char zres[20];
+  int  i;
+      
+  /* initialize our field */
+  BE_32C (field,      0x01234567);
+  BE_32C ((field+4),  0x89ABCDEF);
+  BE_32C ((field+8),  0xFEDCBA98);
+  BE_32C ((field+12), 0x76543210);
+  BE_32C ((field+16), 0x00000000);
+  BE_32C ((field+20), 0x00000000);
+
+  /* calculate response */
+  call_hash(field, challenge, 64);
+  calc_response(zres,field);
+ 
+  /* convert zres to ascii string */
+  for (i=0; i<16; i++ ) {
+    char a, b;
+    
+    a = (zres[i] >> 4) & 15;
+    b = zres[i] & 15;
+
+    result[i*2]   = ((a<10) ? (a+48) : (a+87)) & 255;
+    result[i*2+1] = ((b<10) ? (b+48) : (b+87)) & 255;
+  }
+}
+
+void real_calc_response_and_checksum (char *response, char *chksum, char *challenge) {
+
+  int   ch_len, table_len, resp_len;
+  int   i;
+  char *ptr;
+  char  buf[128];
+
+  /* initialize return values */
+  memset(response, 0, 64);
+  memset(chksum, 0, 34);
+
+  /* initialize buffer */
+  memset(buf, 0, 128);
+  ptr=buf;
+  BE_32C(ptr, 0xa1e9149d);
+  ptr+=4;
+  BE_32C(ptr, 0x0e6b3b59);
+  ptr+=4;
+
+  /* some (length) checks */
+  if (challenge != NULL)
+  {
+    ch_len = strlen (challenge);
+
+    if (ch_len == 40) /* what a hack... */
+    {
+      challenge[32]=0;
+      ch_len=32;
+    }
+    if ( ch_len > 56 ) ch_len=56;
+    
+    /* copy challenge to buf */
+    memcpy(ptr, challenge, ch_len);
+  }
+  
+  if (xor_table != NULL)
+  {
+    table_len = strlen(xor_table);
+
+    if (table_len > 56) table_len=56;
+
+    /* xor challenge bytewise with xor_table */
+    for (i=0; i<table_len; i++)
+      ptr[i] = ptr[i] ^ xor_table[i];
+  }
+
+  calc_response_string (response, buf);
+
+  /* add tail */
+  resp_len = strlen (response);
+  strcpy (&response[resp_len], "01d0a8e3");
+
+  /* calculate checksum */
+  for (i=0; i<resp_len/4; i++)
+    chksum[i] = response[i*4];
+}
+
+
+/*
+ * takes a MLTI-Chunk and a rule number got from match_asm_rule,
+ * returns a pointer to selected data and number of bytes in that.
+ */
+
+static int select_mlti_data(const char *mlti_chunk, int selection, char *out) {
+
+  int numrules, codec, size;
+  int i;
+  
+  /* MLTI chunk should begin with MLTI */
+
+  if ((mlti_chunk[0] != 'M')
+      ||(mlti_chunk[1] != 'L')
+      ||(mlti_chunk[2] != 'T')
+      ||(mlti_chunk[3] != 'I'))
+  {
+    printf("libreal: MLTI tag not detected\n");
+    return 0;
+  }
+
+  mlti_chunk+=4;
+
+  /* next 16 bits are the number of rules */
+  numrules=BE_16(mlti_chunk);
+  if (selection >= numrules) return 0;
+
+  /* now <numrules> indices of codecs follows */
+  /* we skip to selection                     */
+  mlti_chunk+=(selection+1)*2;
+
+  /* get our index */
+  codec=BE_16(mlti_chunk);
+
+  /* skip to number of codecs */
+  mlti_chunk+=(numrules-selection)*2;
+
+  /* get number of codecs */
+  numrules=BE_16(mlti_chunk);
+
+  if (codec >= numrules) {
+    printf("codec index >= number of codecs. %i %i\n", codec, numrules);
+    return 0;
+  }
+
+  mlti_chunk+=2;
+ 
+  /* now seek to selected codec */
+  for (i=0; i<codec; i++) {
+    size=BE_32(mlti_chunk);
+    mlti_chunk+=size+4;
+  }
+  
+  size=BE_32(mlti_chunk);
+
+#ifdef LOG
+  hexdump(mlti_chunk+4, size);
+#endif
+  memcpy(out,mlti_chunk+4, size);
+  return size;
+}
+
+/*
+ * Decodes base64 strings (based upon b64 package)
+ */
+
+static char *b64_decode(const char *in)
+{
+  char dtable[256];              /* Encode / decode table */
+  int i,j,k;
+  char *out=malloc(sizeof(char)*strlen(in));
+
+  for (i = 0; i < 255; i++) {
+    dtable[i] = 0x80;
+  }
+  for (i = 'A'; i <= 'Z'; i++) {
+    dtable[i] = 0 + (i - 'A');
+  }
+  for (i = 'a'; i <= 'z'; i++) {
+    dtable[i] = 26 + (i - 'a');
+  }
+  for (i = '0'; i <= '9'; i++) {
+    dtable[i] = 52 + (i - '0');
+  }
+  dtable['+'] = 62;
+  dtable['/'] = 63;
+  dtable['='] = 0;
+
+  k=0;
+  
+  /*CONSTANTCONDITION*/
+  for (j=0; j<strlen(in); j+=4)
+  {
+    char a[4], b[4];
+
+    for (i = 0; i < 4; i++) {
+      int c = in[i+j];
+
+      if (dtable[c] & 0x80) {
+        printf("Illegal character '%c' in input.\n", c);
+        exit(1);
+      }
+      a[i] = (char) c;
+      b[i] = (char) dtable[c];
+    }
+    out[k++] = (b[0] << 2) | (b[1] >> 4);
+    out[k++] = (b[1] << 4) | (b[2] >> 2);
+    out[k++] = (b[2] << 6) | b[3];
+    i = a[2] == '=' ? 1 : (a[3] == '=' ? 2 : 3);
+    if (i < 3) {
+      out[k]=0;
+      return out;
+    }
+  }
+  out[k]=0;
+  return out;
+}
+
+/*
+ * looking at stream description.
+ */
+ 
+static int sdp_filter(const char *in, const char *filter, char *out) {
+
+  int flen=strlen(filter);
+  int len=strchr(in,'\n')-in;
+
+  if (!strncmp(in,filter,flen))
+  {
+    if(in[flen]=='"') flen++;
+    if(in[len-1]=='"') len--;
+    memcpy(out, &in[flen], len-flen);
+    out[len-flen]=0;
+
+    return len-flen;
+  }
+  
+  return 0;
+}
+
+rmff_header_t *real_parse_sdp(const char *data, char *stream_rules, uint32_t bandwidth) {
+
+  rmff_header_t *h=malloc(sizeof(rmff_header_t));
+  rmff_mdpr_t   *media=NULL;
+  char buf[4096];
+  int rulematches[16];
+  int n;
+  int len;
+  int have_audio=0, have_video=0, stream, sr[2];
+
+  stream_rules[0]=0;
+  
+  h=malloc(sizeof(rmff_header_t));
+  h->streams=malloc(sizeof(rmff_mdpr_t*)*3);
+  h->streams[0]=NULL;
+  h->streams[1]=NULL;
+  h->streams[2]=NULL;
+  h->prop=malloc(sizeof(rmff_prop_t));
+  h->streams[0]=malloc(sizeof(rmff_mdpr_t));
+  h->streams[1]=malloc(sizeof(rmff_mdpr_t));
+  h->cont=malloc(sizeof(rmff_cont_t));
+  h->data=malloc(sizeof(rmff_data_t));
+  h->fileheader=malloc(sizeof(rmff_fileheader_t));
+  h->fileheader->object_id=RMF_TAG;
+  h->fileheader->size=18;
+  h->fileheader->object_version=0;
+  h->fileheader->file_version=0;
+  h->fileheader->num_headers=6;
+
+  h->prop->object_version=0;
+  h->streams[0]->object_version=0;
+  h->streams[1]->object_version=0;
+  h->cont->object_version=0;
+  h->data->object_version=0;
+
+  h->prop->object_id=PROP_TAG;
+  h->streams[0]->object_id=MDPR_TAG;
+  h->streams[1]->object_id=MDPR_TAG;
+  h->cont->object_id=CONT_TAG;
+  h->data->object_id=DATA_TAG;
+
+  h->prop->size=50;
+  h->data->size=18;
+  h->data->next_data_header=0;
+
+  h->cont->title=NULL;
+  h->cont->author=NULL;
+  h->cont->copyright=NULL;
+  h->cont->comment=NULL;
+
+  while (*data) {
+
+    if(sdp_filter(data,"m=audio",buf))
+    {
+      media=h->streams[0];
+      have_audio=1;
+      stream=0;
+    }
+    if(sdp_filter(data,"m=video",buf))
+    {
+      media=h->streams[1];
+      have_video=1;
+      stream=1;
+    }
+  
+    /* cont stuff */
+  
+    len=sdp_filter(data,"a=Title:buffer;",buf);
+    if (len) h->cont->title=b64_decode(buf);
+    
+    len=sdp_filter(data,"a=Author:buffer;",buf);
+    if (len) h->cont->author=b64_decode(buf);
+    
+    len=sdp_filter(data,"a=Copyright:buffer;",buf);
+    if (len) h->cont->copyright=b64_decode(buf);
+    
+    len=sdp_filter(data,"a=Abstract:buffer;",buf);
+    if (len) h->cont->comment=b64_decode(buf);
+
+    /* prop stuff */
+
+    len=sdp_filter(data,"a=StreamCount:integer;",buf);
+    if (len) h->prop->num_streams=atoi(buf);
+
+    len=sdp_filter(data,"a=Flags:integer;",buf);
+    if (len) h->prop->flags=atoi(buf);
+
+    /* mdpr stuff */
+
+    if (media) {
+
+      len=sdp_filter(data,"a=control:streamid=",buf);
+      if (len) media->stream_number=atoi(buf);
+
+      len=sdp_filter(data,"a=MaxBitRate:integer;",buf);
+      if (len)
+      {
+        media->max_bit_rate=atoi(buf);
+        media->avg_bit_rate=media->max_bit_rate;
+      }
+
+      len=sdp_filter(data,"a=MaxPacketSize:integer;",buf);
+      if (len)
+      {
+        media->max_packet_size=atoi(buf);
+        media->avg_packet_size=media->max_packet_size;
+      }
+      
+      len=sdp_filter(data,"a=StartTime:integer;",buf);
+      if (len) media->start_time=atoi(buf);
+
+      len=sdp_filter(data,"a=Preroll:integer;",buf);
+      if (len) media->preroll=atoi(buf);
+
+      len=sdp_filter(data,"a=length:npt=",buf);
+      if (len) media->duration=(uint32_t)(atof(buf)*1000);
+
+      len=sdp_filter(data,"a=StreamName:string;",buf);
+      if (len)
+      {
+        media->stream_name=strdup(buf);
+        media->stream_name_size=strlen(media->stream_name);
+      }
+      len=sdp_filter(data,"a=mimetype:string;",buf);
+      if (len)
+      {
+        media->mime_type=strdup(buf);
+        media->mime_type_size=strlen(media->mime_type);
+      }
+      len=sdp_filter(data,"a=OpaqueData:buffer;",buf);
+      if (len)
+      {
+        media->mlti_data=b64_decode(buf);
+      }
+      len=sdp_filter(data,"a=ASMRuleBook:string;",buf);
+      if (len)
+      {
+        int i=0;
+        char b[64];
+
+#ifdef LOG
+        printf("calling asmrp_match with:\n%s\n%u\n", buf, bandwidth);
+#endif
+        n=asmrp_match(buf, bandwidth, rulematches);
+        sr[stream]=rulematches[0];
+        for (i=0; i<n; i++) {
+#ifdef LOG
+          printf("asmrp rule match: %u for stream %u\n", rulematches[i], stream);
+#endif
+          sprintf(b,"stream=%u;rule=%u,", stream, rulematches[i]);
+          strcat(stream_rules, b);
+        }
+      }
+    }
+    data+=strchr(data,'\n')-data+1;
+  }
+  if (strlen(stream_rules)>0);
+    stream_rules[strlen(stream_rules)-1]=0; /* delete last , */
+
+  /* we have to reconstruct some data in prop */
+  h->prop->max_bit_rate=0;
+  h->prop->avg_bit_rate=0;
+  h->prop->max_packet_size=0;
+  h->prop->avg_packet_size=0;
+  h->prop->num_packets=0;
+  h->prop->duration=0;
+  h->prop->preroll=0;
+  h->prop->index_offset=0;
+  
+      
+  
+  if(have_video)
+  {
+  
+    h->prop->max_bit_rate=h->streams[1]->max_bit_rate;
+    h->prop->avg_bit_rate=h->streams[1]->avg_bit_rate;
+    h->prop->max_packet_size=h->streams[1]->max_packet_size;
+    h->prop->avg_packet_size=h->streams[1]->avg_packet_size;
+    h->prop->duration=h->streams[1]->duration;
+    /* h->prop->preroll=h->streams[1]->preroll; */
+
+    /* select a codec */
+    h->streams[1]->type_specific_len=select_mlti_data(
+          h->streams[1]->mlti_data, sr[1], buf);
+    h->streams[1]->type_specific_data=malloc(sizeof(char)*h->streams[1]->type_specific_len);
+    memcpy(h->streams[1]->type_specific_data, buf, h->streams[1]->type_specific_len);
+    
+  } else
+  {
+    free(h->streams[1]);
+    h->streams[1]=NULL;
+  }
+  if(have_audio)
+  {
+  
+    h->prop->max_bit_rate+=h->streams[0]->max_bit_rate;
+    h->prop->avg_bit_rate+=h->streams[0]->avg_bit_rate;
+    h->prop->max_packet_size=MAX(h->prop->max_packet_size,
+        h->streams[0]->max_packet_size);
+    if (have_video)
+      h->prop->avg_packet_size=(h->streams[1]->avg_packet_size
+          +h->streams[0]->avg_packet_size) / 2;
+    else
+      h->prop->avg_packet_size=h->streams[0]->avg_packet_size;
+    h->prop->duration=MAX(h->prop->duration,h->streams[0]->duration);
+    /* h->prop->preroll=MAX(h->streams[1]->preroll,h->streams[0]->preroll); */
+ 
+    /* select a codec */
+    h->streams[0]->type_specific_len=select_mlti_data(
+          h->streams[0]->mlti_data, sr[0], buf);
+    h->streams[0]->type_specific_data=malloc(sizeof(char)*h->streams[0]->type_specific_len);
+    memcpy(h->streams[0]->type_specific_data, buf, h->streams[0]->type_specific_len);
+    
+ } else
+  {
+    free(h->streams[0]);
+    h->streams[0]=NULL;
+  }
+
+  /* fix sizes */
+      
+  h->cont->title_len=0;
+  h->cont->author_len=0;
+  h->cont->copyright_len=0;
+  h->cont->comment_len=0;
+  if (h->cont->title) h->cont->title_len=strlen(h->cont->title);
+  if (h->cont->author) h->cont->author_len=strlen(h->cont->author);
+  if (h->cont->copyright) h->cont->copyright_len=strlen(h->cont->copyright);
+  if (h->cont->comment) h->cont->comment_len=strlen(h->cont->comment);
+
+  h->cont->size=18
+      +h->cont->title_len
+      +h->cont->author_len
+      +h->cont->copyright_len
+      +h->cont->comment_len;
+
+  if (have_audio)
+    h->streams[0]->size=12+7*4+6
+      +h->streams[0]->stream_name_size
+      +h->streams[0]->mime_type_size
+      +h->streams[0]->type_specific_len;
+
+  if (have_video)
+    h->streams[1]->size=12+7*4+6
+      +h->streams[1]->stream_name_size
+      +h->streams[1]->mime_type_size
+      +h->streams[1]->type_specific_len;
+
+  /* fix data offset */
+  
+  h->prop->data_offset=RMFF_HEADER_SIZE
+      +h->cont->size
+      +h->prop->size;
+
+  if (have_video)
+    h->prop->data_offset+=h->streams[1]->size;
+
+  if (have_audio)
+    h->prop->data_offset+=h->streams[0]->size;
+
+  return h;
+}
+
+int real_get_rdt_chunk(rtsp_t *rtsp_session, char *buffer) {
+
+  int n=1;
+  uint8_t header[8];
+  rmff_pheader_t ph;
+  int size;
+  int flags1;
+  int unknown1;
+  uint32_t ts;
+
+  n=rtsp_read_data(rtsp_session, header, 8);
+  if (n<8) return 0;
+  if (header[0] != 0x24)
+  {
+    printf("rdt chunk not recognized: got 0x%02x\n", header[0]);
+    return 0;
+  }
+  size=(header[1]<<12)+(header[2]<<8)+(header[3]);
+  flags1=header[4];
+  if ((flags1!=0x40)&&(flags1!=0x42))
+  {
+#ifdef LOG
+    printf("got flags1: 0x%02x\n",flags1);
+#endif
+    header[0]=header[5];
+    header[1]=header[6];
+    header[2]=header[7];
+    n=rtsp_read_data(rtsp_session, header+3, 5);
+    if (n<5) return 0;
+#ifdef LOG
+    printf("ignoring bytes:\n");
+    hexdump(header, 8);
+#endif
+    n=rtsp_read_data(rtsp_session, header+4, 4);
+    if (n<4) return 0;
+    flags1=header[4];
+    size-=9;
+  }
+  unknown1=(header[5]<<12)+(header[6]<<8)+(header[7]);
+  n=rtsp_read_data(rtsp_session, header, 6);
+  if (n<6) return 0;
+  ts=BE_32(header);
+  
+#ifdef LOG
+  printf("ts: %u size: %u, flags: 0x%02x, unknown values: %u 0x%02x 0x%02x\n", 
+          ts, size, flags1, unknown1, header[4], header[5]);
+#endif
+  size+=2;
+  
+  ph.object_version=0;
+  ph.length=size;
+  ph.stream_number=(flags1>>1)&1;
+  ph.timestamp=ts;
+  ph.reserved=0;
+  ph.flags=0;      /* TODO: determine keyframe flag and insert here? */
+  rmff_dump_pheader(&ph, buffer);
+  size-=12;
+  n=rtsp_read_data(rtsp_session, buffer+12, size);
+  
+  return n+12;
+}
+
+rmff_header_t  *real_setup_and_get_header(rtsp_t *rtsp_session, uint32_t bandwidth) {
+
+  char *description=NULL;
+  char *session_id=NULL;
+  rmff_header_t *h;
+  char *challenge1;
+  char challenge2[64];
+  char checksum[34];
+  char subscribe[256];
+  char buf[256];
+  char *mrl=rtsp_get_mrl(rtsp_session);
+  unsigned int size;
+  
+  /* get challenge */
+  challenge1=strdup(rtsp_search_answers(rtsp_session,"RealChallenge1"));
+#ifdef LOG
+  printf("real: Challenge1: %s\n", challenge1);
+#endif
+  
+  /* request stream description */
+  rtsp_schedule_field(rtsp_session, "Accept: application/sdp");
+  sprintf(buf, "Bandwidth: %u", bandwidth);
+  rtsp_schedule_field(rtsp_session, buf);
+  rtsp_schedule_field(rtsp_session, "Require: com.real.retain-entity-for-setup");
+  rtsp_request_describe(rtsp_session,NULL);
+
+  /* receive description */
+  size=atoi(rtsp_search_answers(rtsp_session,"Content-length"));
+
+  if (!rtsp_search_answers(rtsp_session,"ETag"))
+    printf("real: got no ETag!\n");
+  else
+    session_id=strdup(rtsp_search_answers(rtsp_session,"ETag"));
+    
+#ifdef LOG
+  printf("real: Stream description size: %i\n", size);
+#endif
+
+  description=malloc(sizeof(char)*(size+1));
+
+  rtsp_read_data(rtsp_session, description, size);
+  description[size]=0;
+
+  /* parse sdp (sdpplin) and create a header and a subscribe string */
+  strcpy(subscribe, "Subscribe: ");
+  h=real_parse_sdp(description, subscribe+11, bandwidth);
+  rmff_fix_header(h);
+
+#ifdef LOG
+  printf("Title: %s\nCopyright: %s\nAuthor: %s\nStreams: %i\n",
+    h->cont->title, h->cont->copyright, h->cont->author, h->prop->num_streams);
+#endif
+  
+  /* setup our 2 streams */
+  real_calc_response_and_checksum (challenge2, checksum, challenge1);
+  sprintf(buf, "RealChallenge2: %s, sd=%s", challenge2, checksum);
+  rtsp_schedule_field(rtsp_session, buf);
+  sprintf(buf, "If-Match: %s", session_id);
+  rtsp_schedule_field(rtsp_session, buf);
+  rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
+  sprintf(buf, "%s/streamid=0", mrl);
+  rtsp_request_setup(rtsp_session,buf);
+ 
+  rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
+  sprintf(buf, "If-Match: %s", session_id);
+  rtsp_schedule_field(rtsp_session, buf);
+
+  sprintf(buf, "%s/streamid=1", mrl);
+  rtsp_request_setup(rtsp_session,buf);
+
+  /* set stream parameter (bandwidth) with our subscribe string */
+  rtsp_schedule_field(rtsp_session, subscribe);
+  rtsp_request_setparameter(rtsp_session,NULL);
+
+  /* and finally send a play request */
+  rtsp_schedule_field(rtsp_session, "Range: npt=0-");
+  rtsp_request_play(rtsp_session,NULL);
+
+  return h;
+}
+