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mpv/libmpdemux/realrtsp/real.c

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/*
* This file was ported to MPlayer from xine CVS real.c,v 1.8 2003/03/30 17:11:50
*/
/*
* 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
*
*
* special functions for real streams.
* adopted from joschkas real tools.
*
*/
#include <stdio.h>
#include <string.h>
#include "real.h"
#include "asmrp.h"
#include "sdpplin.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 mlti_size, 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'))
{
#ifdef LOG
printf("libreal: MLTI tag not detected, copying data\n");
#endif
memcpy(out, mlti_chunk, mlti_size);
return mlti_size;
}
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;
}
/*
* looking at stream description.
*/
rmff_header_t *real_parse_sdp(char *data, char *stream_rules, uint32_t bandwidth) {
sdpplin_t *desc;
rmff_header_t *header;
char buf[2048];
int len, i;
int max_bit_rate=0;
int avg_bit_rate=0;
int max_packet_size=0;
int avg_packet_size=0;
int duration=0;
if (!data) return NULL;
desc=sdpplin_parse(data);
if (!desc) return NULL;
header=calloc(1,sizeof(rmff_header_t));
header->fileheader=rmff_new_fileheader(4+desc->stream_count);
header->cont=rmff_new_cont(
desc->title,
desc->author,
desc->copyright,
desc->abstract);
header->data=rmff_new_dataheader(0,0);
header->streams=calloc(1,sizeof(rmff_mdpr_t*)*(desc->stream_count+1));
#ifdef LOG
printf("number of streams: %u\n", desc->stream_count);
#endif
for (i=0; i<desc->stream_count; i++) {
int j=0;
int n;
char b[64];
int rulematches[16];
#ifdef LOG
printf("calling asmrp_match with:\n%s\n%u\n", desc->stream[i]->asm_rule_book, bandwidth);
#endif
n=asmrp_match(desc->stream[i]->asm_rule_book, bandwidth, rulematches);
for (j=0; j<n; j++) {
#ifdef LOG
printf("asmrp rule match: %u for stream %u\n", rulematches[j], desc->stream[i]->stream_id);
#endif
sprintf(b,"stream=%u;rule=%u,", desc->stream[i]->stream_id, rulematches[j]);
strcat(stream_rules, b);
}
if (!desc->stream[i]->mlti_data) return NULL;
len=select_mlti_data(desc->stream[i]->mlti_data, desc->stream[i]->mlti_data_size, rulematches[0], buf);
header->streams[i]=rmff_new_mdpr(
desc->stream[i]->stream_id,
desc->stream[i]->max_bit_rate,
desc->stream[i]->avg_bit_rate,
desc->stream[i]->max_packet_size,
desc->stream[i]->avg_packet_size,
desc->stream[i]->start_time,
desc->stream[i]->preroll,
desc->stream[i]->duration,
desc->stream[i]->stream_name,
desc->stream[i]->mime_type,
len,
buf);
duration=MAX(duration,desc->stream[i]->duration);
max_bit_rate+=desc->stream[i]->max_bit_rate;
avg_bit_rate+=desc->stream[i]->avg_bit_rate;
max_packet_size=MAX(max_packet_size, desc->stream[i]->max_packet_size);
if (avg_packet_size)
avg_packet_size=(avg_packet_size + desc->stream[i]->avg_packet_size) / 2;
else
avg_packet_size=desc->stream[i]->avg_packet_size;
}
if (stream_rules)
stream_rules[strlen(stream_rules)-1]=0; /* delete last ',' in stream_rules */
header->prop=rmff_new_prop(
max_bit_rate,
avg_bit_rate,
max_packet_size,
avg_packet_size,
0,
duration,
0,
0,
0,
desc->stream_count,
desc->flags);
rmff_fix_header(header);
return header;
}
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;
int status;
/* 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, "GUID: 00000000-0000-0000-0000-000000000000");
rtsp_schedule_field(rtsp_session, "RegionData: 0");
rtsp_schedule_field(rtsp_session, "ClientID: Linux_2.4_6.0.9.1235_play32_RN01_EN_586");
rtsp_schedule_field(rtsp_session, "SupportsMaximumASMBandwidth: 1");
rtsp_schedule_field(rtsp_session, "Language: en-US");
rtsp_schedule_field(rtsp_session, "Require: com.real.retain-entity-for-setup");
status=rtsp_request_describe(rtsp_session,NULL);
if ( status<200 || status>299 )
{
char *alert=rtsp_search_answers(rtsp_session,"Alert");
if (alert) {
printf("real: got message from server:\n%s\n", alert);
}
rtsp_send_ok(rtsp_session);
return NULL;
}
/* receive description */
size=0;
if (!rtsp_search_answers(rtsp_session,"Content-length"))
printf("real: got no Content-length!\n");
else
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);
if (!h) return NULL;
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 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);
if (h->prop->num_streams > 1) {
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;
}
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