2002-12-26 17:25:22 +00:00
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/*
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* Copyright (C) 2000-2002 the xine project
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*
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* This file is part of xine, a free video player.
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*
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* xine is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* xine is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*
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* $Id$
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*
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* pnm protocol implementation
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* based upon code from joschka
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <assert.h>
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//#include <sys/socket.h>
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//#include <netinet/in.h>
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//#include <netdb.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <sys/time.h>
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2002-12-27 22:38:56 +00:00
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#include <inttypes.h>
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2002-12-26 17:25:22 +00:00
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#include "pnm.h"
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//#include "libreal/rmff.h"
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#define FOURCC_TAG( ch0, ch1, ch2, ch3 ) \
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(((long)(unsigned char)(ch3) ) | \
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( (long)(unsigned char)(ch2) << 8 ) | \
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( (long)(unsigned char)(ch1) << 16 ) | \
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( (long)(unsigned char)(ch0) << 24 ) )
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#define RMF_TAG FOURCC_TAG('.', 'R', 'M', 'F')
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#define PROP_TAG FOURCC_TAG('P', 'R', 'O', 'P')
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#define MDPR_TAG FOURCC_TAG('M', 'D', 'P', 'R')
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#define CONT_TAG FOURCC_TAG('C', 'O', 'N', 'T')
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#define DATA_TAG FOURCC_TAG('D', 'A', 'T', 'A')
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#define INDX_TAG FOURCC_TAG('I', 'N', 'D', 'X')
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#define PNA_TAG FOURCC_TAG('P', 'N', 'A', 0 )
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/*
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#define LOG
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*/
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2003-01-10 22:41:49 +00:00
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#define BUF_SIZE 4096
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#define HEADER_SIZE 4096
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2002-12-26 17:25:22 +00:00
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struct pnm_s {
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int s;
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// char *host;
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// int port;
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char *path;
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// char *url;
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char buffer[BUF_SIZE]; /* scratch buffer */
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/* receive buffer */
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uint8_t recv[BUF_SIZE];
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int recv_size;
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int recv_read;
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uint8_t header[HEADER_SIZE];
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int header_len;
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int header_read;
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unsigned int seq_num[4]; /* two streams with two indices */
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unsigned int seq_current[2]; /* seqs of last stream chunk read */
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uint32_t ts_current; /* timestamp of current chunk */
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uint32_t ts_last[2]; /* timestamps of last chunks */
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unsigned int packet; /* number of last recieved packet */
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};
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/*
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* utility macros
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*/
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#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
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#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
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(((uint8_t*)(x))[1] << 16) | \
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(((uint8_t*)(x))[2] << 8) | \
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((uint8_t*)(x))[3])
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/* D means direct (no pointer) */
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#define BE_16D(x) ((x & 0xff00) >> 8)|((x & 0x00ff) << 8)
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/* sizes */
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#define PREAMBLE_SIZE 8
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#define CHECKSUM_SIZE 3
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/* header of rm files */
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#define RM_HEADER_SIZE 0x12
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const unsigned char rm_header[]={
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0x2e, 0x52, 0x4d, 0x46, /* object_id ".RMF" */
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0x00, 0x00, 0x00, 0x12, /* header_size 0x12 */
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0x00, 0x00, /* object_version 0x00 */
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0x00, 0x00, 0x00, 0x00, /* file_version 0x00 */
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0x00, 0x00, 0x00, 0x06 /* num_headers 0x06 */
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};
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/* data chunk header */
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#define PNM_DATA_HEADER_SIZE 18
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const unsigned char pnm_data_header[]={
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'D','A','T','A',
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0,0,0,0, /* data chunk size */
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0,0, /* object version */
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0,0,0,0, /* num packets */
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0,0,0,0}; /* next data header */
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/* pnm request chunk ids */
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#define PNA_CLIENT_CAPS 0x03
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#define PNA_CLIENT_CHALLANGE 0x04
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#define PNA_BANDWIDTH 0x05
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#define PNA_GUID 0x13
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#define PNA_TIMESTAMP 0x17
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#define PNA_TWENTYFOUR 0x18
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#define PNA_CLIENT_STRING 0x63
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#define PNA_PATH_REQUEST 0x52
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const unsigned char pnm_challenge[] = "0990f6b4508b51e801bd6da011ad7b56";
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const unsigned char pnm_timestamp[] = "[15/06/1999:22:22:49 00:00]";
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const unsigned char pnm_guid[] = "3eac2411-83d5-11d2-f3ea-d7c3a51aa8b0";
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const unsigned char pnm_response[] = "97715a899cbe41cee00dd434851535bf";
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const unsigned char client_string[] = "WinNT_4.0_6.0.6.45_plus32_MP60_en-US_686l";
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#define PNM_HEADER_SIZE 11
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const unsigned char pnm_header[] = {
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'P','N','A',
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0x00, 0x0a,
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0x00, 0x14,
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0x00, 0x02,
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0x00, 0x01 };
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#define PNM_CLIENT_CAPS_SIZE 126
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const unsigned char pnm_client_caps[] = {
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0x07, 0x8a, 'p','n','r','v',
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0, 0x90, 'p','n','r','v',
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0, 0x64, 'd','n','e','t',
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0, 0x46, 'p','n','r','v',
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0, 0x32, 'd','n','e','t',
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0, 0x2b, 'p','n','r','v',
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0, 0x28, 'd','n','e','t',
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0, 0x24, 'p','n','r','v',
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0, 0x19, 'd','n','e','t',
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0, 0x18, 'p','n','r','v',
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0, 0x14, 's','i','p','r',
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0, 0x14, 'd','n','e','t',
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0, 0x24, '2','8','_','8',
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0, 0x12, 'p','n','r','v',
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0, 0x0f, 'd','n','e','t',
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0, 0x0a, 's','i','p','r',
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0, 0x0a, 'd','n','e','t',
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0, 0x08, 's','i','p','r',
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0, 0x06, 's','i','p','r',
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0, 0x12, 'l','p','c','J',
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0, 0x07, '0','5','_','6' };
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const uint32_t pnm_default_bandwidth=10485800;
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const uint32_t pnm_available_bandwidths[]={14400,19200,28800,33600,34430,57600,
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115200,262200,393216,524300,1544000,10485800};
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#define PNM_TWENTYFOUR_SIZE 16
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unsigned char pnm_twentyfour[]={
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0xd5, 0x42, 0xa3, 0x1b, 0xef, 0x1f, 0x70, 0x24,
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0x85, 0x29, 0xb3, 0x8d, 0xba, 0x11, 0xf3, 0xd6 };
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/* now other data follows. marked with 0x0000 at the beginning */
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int after_chunks_length=6;
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unsigned char after_chunks[]={
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0x00, 0x00, /* mark */
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0x50, 0x84, /* seems to be fixated */
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0x1f, 0x3a /* varies on each request (checksum ?)*/
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};
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static void hexdump (char *buf, int length);
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static int rm_write(int s, const char *buf, int len) {
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int total, timeout;
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total = 0; timeout = 30;
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while (total < len){
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int n;
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2003-05-29 19:36:58 +00:00
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n = send (s, &buf[total], len - total, 0);
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2002-12-26 17:25:22 +00:00
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if (n > 0)
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total += n;
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else if (n < 0) {
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if ((timeout>0) && ((errno == EAGAIN) || (errno == EINPROGRESS))) {
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sleep (1); timeout--;
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} else
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return -1;
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}
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}
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return total;
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}
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static ssize_t rm_read(int fd, void *buf, size_t count) {
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ssize_t ret, total;
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total = 0;
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while (total < count) {
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fd_set rset;
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struct timeval timeout;
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FD_ZERO (&rset);
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FD_SET (fd, &rset);
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timeout.tv_sec = 3;
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timeout.tv_usec = 0;
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if (select (fd+1, &rset, NULL, NULL, &timeout) <= 0) {
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return -1;
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}
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2003-05-29 19:36:58 +00:00
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ret=recv (fd, ((uint8_t*)buf)+total, count-total, 0);
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2002-12-26 17:25:22 +00:00
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if (ret<=0) {
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printf ("input_pnm: read error.\n");
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return ret;
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} else
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total += ret;
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}
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return total;
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}
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/*
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* debugging utilities
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*/
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static void hexdump (char *buf, int length) {
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int i;
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printf ("input_pnm: ascii>");
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for (i = 0; i < length; i++) {
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unsigned char c = buf[i];
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if ((c >= 32) && (c <= 128))
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printf ("%c", c);
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else
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printf (".");
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}
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printf ("\n");
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printf ("input_pnm: hexdump> ");
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for (i = 0; i < length; i++) {
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unsigned char c = buf[i];
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printf ("%02x", c);
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if ((i % 16) == 15)
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printf ("\npnm: ");
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if ((i % 2) == 1)
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printf (" ");
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}
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printf ("\n");
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}
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/*
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* pnm_get_chunk gets a chunk from stream
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* and returns number of bytes read
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*/
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static unsigned int pnm_get_chunk(pnm_t *p,
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unsigned int max,
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unsigned int *chunk_type,
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char *data, int *need_response) {
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unsigned int chunk_size;
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int n;
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char *ptr;
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/* get first PREAMBLE_SIZE bytes and ignore checksum */
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rm_read (p->s, data, CHECKSUM_SIZE);
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if (data[0] == 0x72)
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rm_read (p->s, data, PREAMBLE_SIZE);
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else
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rm_read (p->s, data+CHECKSUM_SIZE, PREAMBLE_SIZE-CHECKSUM_SIZE);
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*chunk_type = BE_32(data);
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chunk_size = BE_32(data+4);
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switch (*chunk_type) {
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case PNA_TAG:
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*need_response=0;
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ptr=data+PREAMBLE_SIZE;
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rm_read (p->s, ptr++, 1);
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while(1) {
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/* expecting following chunk format: 0x4f <chunk size> <data...> */
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rm_read (p->s, ptr, 2);
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if (*ptr == 'X') /* checking for server message */
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{
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printf("input_pnm: got a message from server:\n");
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rm_read (p->s, ptr+2, 1);
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n=BE_16(ptr+1);
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rm_read (p->s, ptr+3, n);
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ptr[3+n]=0;
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printf("%s\n",ptr+3);
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return -1;
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}
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if (*ptr == 'F') /* checking for server error */
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{
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printf("input_pnm: server error.\n");
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return -1;
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}
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if (*ptr == 'i')
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{
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ptr+=2;
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*need_response=1;
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continue;
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}
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if (*ptr != 0x4f) break;
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n=ptr[1];
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rm_read (p->s, ptr+2, n);
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ptr+=(n+2);
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}
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/* the checksum of the next chunk is ignored here */
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rm_read (p->s, ptr+2, 1);
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ptr+=3;
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chunk_size=ptr-data;
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break;
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case RMF_TAG:
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case DATA_TAG:
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case PROP_TAG:
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case MDPR_TAG:
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case CONT_TAG:
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if (chunk_size > max) {
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printf("error: max chunk size exeeded (max was 0x%04x)\n", max);
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n=rm_read (p->s, &data[PREAMBLE_SIZE], 0x100 - PREAMBLE_SIZE);
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hexdump(data,n+PREAMBLE_SIZE);
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return -1;
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|
}
|
|
|
|
rm_read (p->s, &data[PREAMBLE_SIZE], chunk_size-PREAMBLE_SIZE);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
*chunk_type = 0;
|
|
|
|
chunk_size = PREAMBLE_SIZE;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return chunk_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* writes a chunk to a buffer, returns number of bytes written
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int pnm_write_chunk(uint16_t chunk_id, uint16_t length,
|
|
|
|
const char *chunk, char *data) {
|
|
|
|
|
|
|
|
data[0]=(chunk_id>>8)%0xff;
|
|
|
|
data[1]=chunk_id%0xff;
|
|
|
|
data[2]=(length>>8)%0xff;
|
|
|
|
data[3]=length%0xff;
|
|
|
|
memcpy(&data[4],chunk,length);
|
|
|
|
|
|
|
|
return length+4;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* constructs a request and sends it
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void pnm_send_request(pnm_t *p, uint32_t bandwidth) {
|
|
|
|
|
|
|
|
uint16_t i16;
|
|
|
|
int c=PNM_HEADER_SIZE;
|
|
|
|
char fixme[]={0,1};
|
|
|
|
|
|
|
|
memcpy(p->buffer,pnm_header,PNM_HEADER_SIZE);
|
|
|
|
c+=pnm_write_chunk(PNA_CLIENT_CHALLANGE,strlen(pnm_challenge),
|
|
|
|
pnm_challenge,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(PNA_CLIENT_CAPS,PNM_CLIENT_CAPS_SIZE,
|
|
|
|
pnm_client_caps,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(0x0a,0,NULL,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(0x0c,0,NULL,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(0x0d,0,NULL,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(0x16,2,fixme,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(PNA_TIMESTAMP,strlen(pnm_timestamp),
|
|
|
|
pnm_timestamp,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(PNA_BANDWIDTH,4,
|
|
|
|
(const char *)&pnm_default_bandwidth,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(0x08,0,NULL,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(0x0e,0,NULL,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(0x0f,0,NULL,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(0x11,0,NULL,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(0x10,0,NULL,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(0x15,0,NULL,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(0x12,0,NULL,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(PNA_GUID,strlen(pnm_guid),
|
|
|
|
pnm_guid,&p->buffer[c]);
|
|
|
|
c+=pnm_write_chunk(PNA_TWENTYFOUR,PNM_TWENTYFOUR_SIZE,
|
|
|
|
pnm_twentyfour,&p->buffer[c]);
|
|
|
|
|
|
|
|
/* data after chunks */
|
|
|
|
memcpy(&p->buffer[c],after_chunks,after_chunks_length);
|
|
|
|
c+=after_chunks_length;
|
|
|
|
|
|
|
|
/* client id string */
|
|
|
|
p->buffer[c]=PNA_CLIENT_STRING;
|
|
|
|
i16=BE_16D((strlen(client_string)-1)); /* dont know why do we have -1 here */
|
|
|
|
memcpy(&p->buffer[c+1],&i16,2);
|
|
|
|
memcpy(&p->buffer[c+3],client_string,strlen(client_string)+1);
|
|
|
|
c=c+3+strlen(client_string)+1;
|
|
|
|
|
|
|
|
/* file path */
|
|
|
|
p->buffer[c]=0;
|
|
|
|
p->buffer[c+1]=PNA_PATH_REQUEST;
|
|
|
|
i16=BE_16D(strlen(p->path));
|
|
|
|
memcpy(&p->buffer[c+2],&i16,2);
|
|
|
|
memcpy(&p->buffer[c+4],p->path,strlen(p->path));
|
|
|
|
c=c+4+strlen(p->path);
|
|
|
|
|
|
|
|
/* some trailing bytes */
|
|
|
|
p->buffer[c]='y';
|
|
|
|
p->buffer[c+1]='B';
|
|
|
|
|
|
|
|
rm_write(p->s,p->buffer,c+2);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* pnm_send_response sends a response of a challenge
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void pnm_send_response(pnm_t *p, const char *response) {
|
|
|
|
|
|
|
|
int size=strlen(response);
|
|
|
|
|
|
|
|
p->buffer[0]=0x23;
|
|
|
|
p->buffer[1]=0;
|
|
|
|
p->buffer[2]=(unsigned char) size;
|
|
|
|
|
|
|
|
memcpy(&p->buffer[3], response, size);
|
|
|
|
|
|
|
|
rm_write (p->s, p->buffer, size+3);
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* get headers and challenge and fix headers
|
|
|
|
* write headers to p->header
|
|
|
|
* write challenge to p->buffer
|
|
|
|
*
|
|
|
|
* return 0 on error. != 0 on success
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int pnm_get_headers(pnm_t *p, int *need_response) {
|
|
|
|
|
|
|
|
uint32_t chunk_type;
|
|
|
|
uint8_t *ptr=p->header;
|
|
|
|
uint8_t *prop_hdr=NULL;
|
|
|
|
int chunk_size,size=0;
|
|
|
|
int nr;
|
|
|
|
/* rmff_header_t *h; */
|
|
|
|
|
|
|
|
*need_response=0;
|
|
|
|
|
|
|
|
while(1) {
|
|
|
|
if (HEADER_SIZE-size<=0)
|
|
|
|
{
|
|
|
|
printf("input_pnm: header buffer overflow. exiting\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
chunk_size=pnm_get_chunk(p,HEADER_SIZE-size,&chunk_type,ptr,&nr);
|
|
|
|
if (chunk_size < 0) return 0;
|
|
|
|
if (chunk_type == 0) break;
|
|
|
|
if (chunk_type == PNA_TAG)
|
|
|
|
{
|
|
|
|
memcpy(ptr, rm_header, RM_HEADER_SIZE);
|
|
|
|
chunk_size=RM_HEADER_SIZE;
|
|
|
|
*need_response=nr;
|
|
|
|
}
|
|
|
|
if (chunk_type == DATA_TAG)
|
|
|
|
chunk_size=0;
|
|
|
|
if (chunk_type == RMF_TAG)
|
|
|
|
chunk_size=0;
|
|
|
|
if (chunk_type == PROP_TAG)
|
|
|
|
prop_hdr=ptr;
|
|
|
|
size+=chunk_size;
|
|
|
|
ptr+=chunk_size;
|
|
|
|
}
|
|
|
|
|
2003-01-09 18:00:58 +00:00
|
|
|
if (!prop_hdr) {
|
|
|
|
printf("input_pnm: error while parsing headers.\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2002-12-26 17:25:22 +00:00
|
|
|
/* set data offset */
|
|
|
|
size--;
|
|
|
|
prop_hdr[42]=(size>>24)%0xff;
|
|
|
|
prop_hdr[43]=(size>>16)%0xff;
|
|
|
|
prop_hdr[44]=(size>>8)%0xff;
|
|
|
|
prop_hdr[45]=(size)%0xff;
|
|
|
|
size++;
|
|
|
|
|
|
|
|
/* read challenge */
|
|
|
|
memcpy (p->buffer, ptr, PREAMBLE_SIZE);
|
|
|
|
rm_read (p->s, &p->buffer[PREAMBLE_SIZE], 64);
|
|
|
|
|
|
|
|
/* now write a data header */
|
|
|
|
memcpy(ptr, pnm_data_header, PNM_DATA_HEADER_SIZE);
|
|
|
|
size+=PNM_DATA_HEADER_SIZE;
|
|
|
|
/*
|
|
|
|
h=rmff_scan_header(p->header);
|
|
|
|
rmff_fix_header(h);
|
|
|
|
p->header_len=rmff_get_header_size(h);
|
|
|
|
rmff_dump_header(h, p->header, HEADER_SIZE);
|
|
|
|
*/
|
|
|
|
p->header_len=size;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* determine correct stream number by looking at indices
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int pnm_calc_stream(pnm_t *p) {
|
|
|
|
|
|
|
|
char str0=0,str1=0;
|
|
|
|
|
|
|
|
/* looking at the first index to
|
|
|
|
* find possible stream types
|
|
|
|
*/
|
|
|
|
if (p->seq_current[0]==p->seq_num[0]) str0=1;
|
|
|
|
if (p->seq_current[0]==p->seq_num[2]) str1=1;
|
|
|
|
|
|
|
|
switch (str0+str1) {
|
|
|
|
case 1: /* one is possible, good. */
|
|
|
|
if (str0)
|
|
|
|
{
|
|
|
|
p->seq_num[0]++;
|
|
|
|
p->seq_num[1]=p->seq_current[1]+1;
|
|
|
|
return 0;
|
|
|
|
} else
|
|
|
|
{
|
|
|
|
p->seq_num[2]++;
|
|
|
|
p->seq_num[3]=p->seq_current[1]+1;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 0:
|
|
|
|
case 2: /* both types or none possible, not so good */
|
|
|
|
/* try to figure out by second index */
|
|
|
|
if ( (p->seq_current[1] == p->seq_num[1])
|
|
|
|
&&(p->seq_current[1] != p->seq_num[3]))
|
|
|
|
{
|
|
|
|
/* ok, only stream0 matches */
|
|
|
|
p->seq_num[0]=p->seq_current[0]+1;
|
|
|
|
p->seq_num[1]++;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
if ( (p->seq_current[1] == p->seq_num[3])
|
|
|
|
&&(p->seq_current[1] != p->seq_num[1]))
|
|
|
|
{
|
|
|
|
/* ok, only stream1 matches */
|
|
|
|
p->seq_num[2]=p->seq_current[0]+1;
|
|
|
|
p->seq_num[3]++;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
/* wow, both streams match, or not. */
|
|
|
|
/* now we try to decide by timestamps */
|
|
|
|
if (p->ts_current < p->ts_last[1])
|
|
|
|
return 0;
|
|
|
|
if (p->ts_current < p->ts_last[0])
|
|
|
|
return 1;
|
|
|
|
/* does not help, we guess type 0 */
|
|
|
|
#ifdef LOG
|
|
|
|
printf("guessing stream# 0\n");
|
|
|
|
#endif
|
|
|
|
p->seq_num[0]=p->seq_current[0]+1;
|
|
|
|
p->seq_num[1]=p->seq_current[1]+1;
|
|
|
|
return 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
printf("input_pnm: wow, something very nasty happened in pnm_calc_stream\n");
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* gets a stream chunk and writes it to a recieve buffer
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int pnm_get_stream_chunk(pnm_t *p) {
|
|
|
|
|
|
|
|
int n;
|
|
|
|
char keepalive='!';
|
|
|
|
unsigned int fof1, fof2, stream;
|
|
|
|
|
|
|
|
/* send a keepalive */
|
|
|
|
/* realplayer seems to do that every 43th package */
|
|
|
|
if ((p->packet%43) == 42)
|
|
|
|
{
|
|
|
|
rm_write(p->s,&keepalive,1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* data chunks begin with: 'Z' <o> <o> <i1> 'Z' <i2>
|
|
|
|
* where <o> is the offset to next stream chunk,
|
|
|
|
* <i1> is a 16 bit index
|
|
|
|
* <i2> is a 8 bit index which counts from 0x10 to somewhere
|
|
|
|
*/
|
|
|
|
|
|
|
|
n = rm_read (p->s, p->buffer, 8);
|
|
|
|
if (n<8) return 0;
|
|
|
|
|
|
|
|
/* skip 8 bytes if 0x62 is read */
|
|
|
|
if (p->buffer[0] == 0x62)
|
|
|
|
{
|
|
|
|
n = rm_read (p->s, p->buffer, 8);
|
|
|
|
if (n<8) return 0;
|
|
|
|
#ifdef LOG
|
|
|
|
printf("input_pnm: had to seek 8 bytes on 0x62\n");
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/* a server message */
|
|
|
|
if (p->buffer[0] == 'X')
|
|
|
|
{
|
|
|
|
int size=BE_16(&p->buffer[1]);
|
|
|
|
|
|
|
|
rm_read (p->s, &p->buffer[8], size-5);
|
|
|
|
p->buffer[size+3]=0;
|
|
|
|
printf("input_pnm: got message from server while reading stream:\n%s\n", &p->buffer[3]);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
if (p->buffer[0] == 'F')
|
|
|
|
{
|
|
|
|
printf("input_pnm: server error.\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* skip bytewise to next chunk.
|
|
|
|
* seems, that we dont need that, if we send enough
|
|
|
|
* keepalives
|
|
|
|
*/
|
|
|
|
n=0;
|
|
|
|
while (p->buffer[0] != 0x5a) {
|
|
|
|
int i;
|
|
|
|
for (i=1; i<8; i++) {
|
|
|
|
p->buffer[i-1]=p->buffer[i];
|
|
|
|
}
|
|
|
|
rm_read (p->s, &p->buffer[7], 1);
|
|
|
|
n++;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef LOG
|
|
|
|
if (n) printf("input_pnm: had to seek %i bytes to next chunk\n", n);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* check for 'Z's */
|
|
|
|
if ((p->buffer[0] != 0x5a)||(p->buffer[7] != 0x5a))
|
|
|
|
{
|
|
|
|
printf("input_pnm: bad boundaries\n");
|
|
|
|
hexdump(p->buffer, 8);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* check offsets */
|
|
|
|
fof1=BE_16(&p->buffer[1]);
|
|
|
|
fof2=BE_16(&p->buffer[3]);
|
|
|
|
if (fof1 != fof2)
|
|
|
|
{
|
|
|
|
printf("input_pnm: frame offsets are different: 0x%04x 0x%04x\n",fof1,fof2);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* get first index */
|
|
|
|
p->seq_current[0]=BE_16(&p->buffer[5]);
|
|
|
|
|
|
|
|
/* now read the rest of stream chunk */
|
|
|
|
n = rm_read (p->s, &p->recv[5], fof1-5);
|
|
|
|
if (n<(fof1-5)) return 0;
|
|
|
|
|
|
|
|
/* get second index */
|
|
|
|
p->seq_current[1]=p->recv[5];
|
|
|
|
|
|
|
|
/* get timestamp */
|
|
|
|
p->ts_current=BE_32(&p->recv[6]);
|
|
|
|
|
|
|
|
/* get stream number */
|
|
|
|
stream=pnm_calc_stream(p);
|
|
|
|
|
|
|
|
/* saving timestamp */
|
|
|
|
p->ts_last[stream]=p->ts_current;
|
|
|
|
|
|
|
|
/* constructing a data packet header */
|
|
|
|
|
|
|
|
p->recv[0]=0; /* object version */
|
|
|
|
p->recv[1]=0;
|
|
|
|
|
|
|
|
fof2=BE_16(&fof2);
|
|
|
|
memcpy(&p->recv[2], &fof2, 2);
|
|
|
|
/*p->recv[2]=(fof2>>8)%0xff;*/ /* length */
|
|
|
|
/*p->recv[3]=(fof2)%0xff;*/
|
|
|
|
|
|
|
|
p->recv[4]=0; /* stream number */
|
|
|
|
p->recv[5]=stream;
|
|
|
|
|
|
|
|
p->recv[10]=p->recv[10] & 0xfe; /* streambox seems to do that... */
|
|
|
|
|
|
|
|
p->packet++;
|
|
|
|
|
|
|
|
p->recv_size=fof1;
|
|
|
|
|
|
|
|
return fof1;
|
|
|
|
}
|
|
|
|
|
|
|
|
// pnm_t *pnm_connect(const char *mrl) {
|
|
|
|
pnm_t *pnm_connect(int fd, char *path) {
|
|
|
|
|
|
|
|
pnm_t *p=malloc(sizeof(pnm_t));
|
2003-01-09 18:00:58 +00:00
|
|
|
int need_response=0;
|
2002-12-26 17:25:22 +00:00
|
|
|
|
|
|
|
p->path=strdup(path);
|
|
|
|
p->s=fd;
|
|
|
|
|
|
|
|
pnm_send_request(p,pnm_available_bandwidths[10]);
|
|
|
|
if (!pnm_get_headers(p, &need_response)) {
|
|
|
|
printf ("input_pnm: failed to set up stream\n");
|
|
|
|
free(p->path);
|
|
|
|
free(p);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
if (need_response)
|
|
|
|
pnm_send_response(p, pnm_response);
|
|
|
|
p->ts_last[0]=0;
|
|
|
|
p->ts_last[1]=0;
|
|
|
|
|
|
|
|
/* copy header to recv */
|
|
|
|
|
|
|
|
memcpy(p->recv, p->header, p->header_len);
|
|
|
|
p->recv_size = p->header_len;
|
|
|
|
p->recv_read = 0;
|
|
|
|
|
|
|
|
return p;
|
|
|
|
}
|
|
|
|
|
|
|
|
int pnm_read (pnm_t *this, char *data, int len) {
|
|
|
|
|
|
|
|
int to_copy=len;
|
|
|
|
char *dest=data;
|
|
|
|
char *source=this->recv + this->recv_read;
|
|
|
|
int fill=this->recv_size - this->recv_read;
|
|
|
|
|
|
|
|
if (len < 0) return 0;
|
|
|
|
while (to_copy > fill) {
|
|
|
|
|
|
|
|
memcpy(dest, source, fill);
|
|
|
|
to_copy -= fill;
|
|
|
|
dest += fill;
|
|
|
|
this->recv_read=0;
|
|
|
|
|
|
|
|
if (!pnm_get_stream_chunk (this)) {
|
|
|
|
#ifdef LOG
|
|
|
|
printf ("input_pnm: %d of %d bytes provided\n", len-to_copy, len);
|
|
|
|
#endif
|
|
|
|
return len-to_copy;
|
|
|
|
}
|
|
|
|
source = this->recv;
|
|
|
|
fill = this->recv_size - this->recv_read;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(dest, source, to_copy);
|
|
|
|
this->recv_read += to_copy;
|
|
|
|
|
|
|
|
#ifdef LOG
|
|
|
|
printf ("input_pnm: %d bytes provided\n", len);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
int pnm_peek_header (pnm_t *this, char *data) {
|
|
|
|
|
|
|
|
memcpy (data, this->header, this->header_len);
|
|
|
|
return this->header_len;
|
|
|
|
}
|
|
|
|
|
|
|
|
void pnm_close(pnm_t *p) {
|
|
|
|
|
|
|
|
if (p->s >= 0) close(p->s);
|
|
|
|
free(p->path);
|
|
|
|
free(p);
|
|
|
|
}
|
|
|
|
|