[Mplayer-cvslog] CVS: main/libmpdemux stream_netstream.c,NONE,1.1 netstream.h,NONE,1.1
Alban Bedel CVS
albeu at mplayerhq.hu
Sun Apr 6 18:33:17 CEST 2003
Update of /cvsroot/mplayer/main/libmpdemux
In directory mail:/var/tmp.root/cvs-serv5537/libmpdemux
Added Files:
stream_netstream.c netstream.h
Log Message:
A new stream wich allow access to MPlayer stream accross the network.
URL is mpst://host[:port]/remote_url where remote_url is any valid
MPlayer url.
--- NEW FILE ---
/*
* stream_netstream.c
*
* Copyright (C) Alban Bedel - 04/2003
*
* This file is part of MPlayer, a free movie player.
*
* MPlayer 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, or (at your option)
* any later version.
*
* MPlayer 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 GNU Make; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
*/
/*
* Net stream allow you to access MPlayer stream accross a tcp
* connection.
* Note that at least mf and tv use a dummy stream (they are
* implemented at the demuxer level) so you won't be able to
* access those :(( but dvd, vcd and so on should work perfectly
* (if you have the bandwidth ;)
* A simple server is in TOOLS/netstream.
*
*/
#include "config.h"
#ifdef STREAMING
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <inttypes.h>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "mp_msg.h"
#include "stream.h"
#include "help_mp.h"
#include "../m_option.h"
#include "../m_struct.h"
#include "netstream.h"
static struct stream_priv_s {
char* host;
int port;
char* url;
} stream_priv_dflts = {
NULL,
10000,
NULL
};
#define ST_OFF(f) M_ST_OFF(struct stream_priv_s,f)
/// URL definition
static m_option_t stream_opts_fields[] = {
{"hostname", ST_OFF(host), CONF_TYPE_STRING, 0, 0 ,0, NULL},
{"port", ST_OFF(port), CONF_TYPE_INT, M_OPT_MIN, 1 ,0, NULL},
{"filename", ST_OFF(url), CONF_TYPE_STRING, 0, 0 ,0, NULL},
{ NULL, NULL, 0, 0, 0, 0, NULL }
};
static struct m_struct_st stream_opts = {
"netstream",
sizeof(struct stream_priv_s),
&stream_priv_dflts,
stream_opts_fields
};
//// When the cache is running we need a lock as
//// fill_buffer is called from another proccess
static int lock_fd(int fd) {
struct flock lock;
memset(&lock,0,sizeof(struct flock));
lock.l_type = F_WRLCK;
mp_msg(MSGT_STREAM,MSGL_DBG2, "Lock (%d)\n",getpid());
do {
if(fcntl(fd,F_SETLKW,&lock)) {
if(errno == EAGAIN) continue;
mp_msg(MSGT_STREAM,MSGL_ERR, "Failed to get the lock: %s\n",
strerror(errno));
return 0;
}
} while(0);
mp_msg(MSGT_STREAM,MSGL_DBG2, "Locked (%d)\n",getpid());
return 1;
}
static int unlock_fd(int fd) {
struct flock lock;
memset(&lock,0,sizeof(struct flock));
lock.l_type = F_UNLCK;
mp_msg(MSGT_STREAM,MSGL_DBG2, "Unlock (%d)\n",getpid());
if(fcntl(fd,F_SETLK,&lock)) {
mp_msg(MSGT_STREAM,MSGL_ERR, "Failed to release the lock: %s\n",
strerror(errno));
return 0;
}
return 1;
}
static mp_net_stream_packet_t* send_net_stream_cmd(stream_t *s,uint16_t cmd,char* data,int len) {
mp_net_stream_packet_t* pack;
// Cache is enabled : lock
if(s->cache_data && !lock_fd(s->fd))
return NULL;
// Send a command
if(!write_packet(s->fd,cmd,data,len)) {
if(s->cache_data) unlock_fd(s->fd);
return 0;
}
// Read the response
pack = read_packet(s->fd);
// Now we can unlock
if(s->cache_data) unlock_fd(s->fd);
if(!pack)
return NULL;
switch(pack->cmd) {
case NET_STREAM_OK:
return pack;
case NET_STREAM_ERROR:
if(pack->len > sizeof(mp_net_stream_packet_t))
mp_msg(MSGT_STREAM,MSGL_ERR, "Fill buffer failed: %s\n",pack->data);
else
mp_msg(MSGT_STREAM,MSGL_ERR, "Fill buffer failed\n");
free(pack);
return NULL;
}
mp_msg(MSGT_STREAM,MSGL_ERR, "Unknow response to %d: %d\n",pack->cmd);
free(pack);
return NULL;
}
static int fill_buffer(stream_t *s, char* buffer, int max_len){
uint16_t len = max_len;
mp_net_stream_packet_t* pack;
pack = send_net_stream_cmd(s,NET_STREAM_FILL_BUFFER,(char*)&len,2);
if(!pack) {
return -1;
}
len = pack->len - sizeof(mp_net_stream_packet_t);
if(len > max_len) {
mp_msg(MSGT_STREAM,MSGL_ERR, "Got a too big a packet %d / %d\n",len,max_len);
free(pack);
return 0;
}
if(len > 0)
memcpy(buffer,pack->data,len);
free(pack);
return len;
}
static int seek(stream_t *s,off_t newpos) {
uint64_t pos = (uint64_t)newpos;
mp_net_stream_packet_t* pack;
pack = send_net_stream_cmd(s,NET_STREAM_SEEK,(char*)&pos,8);
if(!pack) {
return 0;
}
s->pos = newpos;
free(pack);
return 1;
}
static int net_stream_reset(struct stream_st *s) {
mp_net_stream_packet_t* pack;
pack = send_net_stream_cmd(s,NET_STREAM_RESET,NULL,0);
if(!pack) {
return 0;
}
free(pack);
return 1;
}
static int control(struct stream_st *s,int cmd,void* arg) {
switch(cmd) {
case STREAM_CTRL_RESET:
return net_stream_reset(s);
}
return STREAM_UNSUPORTED;
}
static void close_s(struct stream_st *s) {
mp_net_stream_packet_t* pack;
pack = send_net_stream_cmd(s,NET_STREAM_CLOSE,NULL,0);
if(pack)
free(pack);
}
static int open_s(stream_t *stream,int mode, void* opts, int* file_format) {
int f;
struct stream_priv_s* p = (struct stream_priv_s*)opts;
mp_net_stream_packet_t* pack;
mp_net_stream_opened_t* opened;
if(mode != STREAM_READ)
return STREAM_UNSUPORTED;
if(!p->host) {
mp_msg(MSGT_OPEN,MSGL_ERR, "We need an host name (ex: mpst://server.net/cdda://5)\n");
m_struct_free(&stream_opts,opts);
return STREAM_ERROR;
}
if(!p->url || strlen(p->url) == 0) {
mp_msg(MSGT_OPEN,MSGL_ERR, "We need a remote url (ex: mpst://server.net/cdda://5)\n");
m_struct_free(&stream_opts,opts);
return STREAM_ERROR;
}
f = connect2Server(p->host,p->port);
if(f < 0) {
mp_msg(MSGT_OPEN,MSGL_ERR, "Connection to %s:%d failed\n",p->host,p->port);
m_struct_free(&stream_opts,opts);
return STREAM_ERROR;
}
stream->fd = f;
/// Now send an open command
pack = send_net_stream_cmd(stream,NET_STREAM_OPEN,p->url,strlen(p->url) + 1);
if(!pack) {
goto error;
}
if(pack->len != sizeof(mp_net_stream_packet_t) +
sizeof(mp_net_stream_opened_t)) {
mp_msg(MSGT_OPEN,MSGL_ERR, "Invalid open response packet len (%d bytes)\n",pack->len);
free(pack);
goto error;
}
opened = (mp_net_stream_opened_t*)pack->data;
*file_format = opened->file_format;
stream->flags = opened->flags;
stream->sector_size = opened->sector_size;
stream->start_pos = opened->start_pos;
stream->end_pos = opened->end_pos;
stream->fill_buffer = fill_buffer;
stream->control = control;
if(stream->flags & STREAM_SEEK)
stream->seek = seek;
stream->close = close_s;
free(pack);
m_struct_free(&stream_opts,opts);
return STREAM_OK;
error:
close(f);
m_struct_free(&stream_opts,opts);
return STREAM_ERROR;
}
stream_info_t stream_info_netstream = {
"Net stream",
"netstream",
"Albeu",
"",
open_s,
{ "mpst",NULL },
&stream_opts,
1 // Url is an option string
};
#endif
--- NEW FILE ---
/*
* Common stuff for netstream
* Packets and so on are defined here along with a few helpers
* wich are used by both the client and the server
*/
typedef struct mp_net_stream_packet_st {
uint16_t len;
uint8_t cmd;
char data[0];
} __attribute__ ((packed)) mp_net_stream_packet_t;
#define PACKET_MAX_SIZE 4096
// Commands sent by the client
#define NET_STREAM_OPEN 0
// data is the url
#define NET_STREAM_FILL_BUFFER 1
// data is an uint16 wich is the max len of the data to return
#define NET_STREAM_SEEK 3
// data is an uint64 wich the pos where to seek
#define NET_STREAM_CLOSE 4
// no data
#define NET_STREAM_RESET 5
// no data
// Server response
#define NET_STREAM_OK 128
// Data returned if open is successful
typedef struct mp_net_stream_opened_st {
uint32_t file_format;
uint32_t flags;
uint32_t sector_size;
uint64_t start_pos;
uint64_t end_pos;
} __attribute__ ((packed)) mp_net_stream_opened_t;
// FILL_BUFFER return the data
// CLOSE return nothing
#define NET_STREAM_ERROR 129
// Data is the error message (if any ;)
static int net_read(int fd, char* buf, int len) {
int r = 0;
while(len) {
r = read(fd,buf,len);
if(r <= 0) {
if(errno == EINTR) continue;
if(r < 0)
mp_msg(MSGT_NETST,MSGL_ERR,"Read failed: %s\n",strerror(errno));
return 0;
}
len -= r;
}
return 1;
}
static mp_net_stream_packet_t* read_packet(int fd) {
uint16_t len;
mp_net_stream_packet_t* pack =
(mp_net_stream_packet_t*)malloc(sizeof(mp_net_stream_packet_t));
if(!net_read(fd,(char*)pack,sizeof(mp_net_stream_packet_t))) {
free(pack);
return NULL;
}
if(pack->len < sizeof(mp_net_stream_packet_t)) {
mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid packet (too small: %d)\n",pack->len);
free(pack);
return NULL;
}
if(pack->len > PACKET_MAX_SIZE) {
mp_msg(MSGT_NETST,MSGL_WARN,"Got invalid packet (too big: %d)\n",pack->len);
free(pack);
return NULL;
}
len = pack->len;
if(len > sizeof(mp_net_stream_packet_t)) {
pack = realloc(pack,len);
if(!pack) {
mp_msg(MSGT_NETST,MSGL_ERR,"Failed to get memory for the packet (%d bytes)\n",len);
return NULL;
}
if(!net_read(fd,pack->data,len - sizeof(mp_net_stream_packet_t)))
return NULL;
}
// printf ("Read packet %d %d %d\n",fd,pack->cmd,pack->len);
return pack;
}
static int net_write(int fd, char* buf, int len) {
int w;
while(len) {
w = write(fd,buf,len);
if(w <= 0) {
if(errno == EINTR) continue;
if(w < 0)
mp_msg(MSGT_NETST,MSGL_ERR,"Write failed: %s\n",strerror(errno));
return 0;
}
len -= w;
}
return 1;
}
static int write_packet(int fd, uint8_t cmd,char* data,int len) {
mp_net_stream_packet_t* pack = malloc(len + sizeof(mp_net_stream_packet_t));
if(len > 0 && data)
memcpy(pack->data,data,len);
pack->len = len + sizeof(mp_net_stream_packet_t);
pack->cmd = cmd;
// printf("Write packet %d %d (%p) %d\n",fd,cmd,data,len);
if(net_write(fd,(char*)pack,pack->len)) {
free(pack);
return 1;
}
free(pack);
return 0;
}
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