mirror of
https://github.com/mpv-player/mpv
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17f509905c
clearer that netstream.h belongs to stream_netstream.c. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27779 b3059339-0415-0410-9bf9-f77b7e298cf2
307 lines
7.4 KiB
C
307 lines
7.4 KiB
C
/*
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* Copyright (C) Alban Bedel - 04/2003
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*
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* This file is part of MPlayer.
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*
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* MPlayer 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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* MPlayer 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 along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* Net stream allow you to access MPlayer stream accross a tcp
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* connection.
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* Note that at least mf and tv use a dummy stream (they are
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* implemented at the demuxer level) so you won't be able to
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* access those :(( but dvd, vcd and so on should work perfectly
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* (if you have the bandwidth ;)
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* A simple server is in TOOLS/netstream.
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*
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <inttypes.h>
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#include <errno.h>
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#ifndef HAVE_WINSOCK2_H
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#else
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#include <winsock2.h>
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#endif
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#include "mp_msg.h"
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#include "stream.h"
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#include "help_mp.h"
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#include "m_option.h"
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#include "m_struct.h"
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#include "libavutil/common.h"
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#include "mpbswap.h"
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#include "network.h"
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#include "stream_netstream.h"
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#include "tcp.h"
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static struct stream_priv_s {
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char* host;
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int port;
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char* url;
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} stream_priv_dflts = {
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NULL,
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10000,
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NULL
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};
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#define ST_OFF(f) M_ST_OFF(struct stream_priv_s,f)
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/// URL definition
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static const m_option_t stream_opts_fields[] = {
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{"hostname", ST_OFF(host), CONF_TYPE_STRING, 0, 0 ,0, NULL},
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{"port", ST_OFF(port), CONF_TYPE_INT, M_OPT_MIN, 1 ,0, NULL},
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{"filename", ST_OFF(url), CONF_TYPE_STRING, 0, 0 ,0, NULL},
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{ NULL, NULL, 0, 0, 0, 0, NULL }
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};
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static const struct m_struct_st stream_opts = {
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"netstream",
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sizeof(struct stream_priv_s),
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&stream_priv_dflts,
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stream_opts_fields
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};
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//// When the cache is running we need a lock as
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//// fill_buffer is called from another proccess
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static int lock_fd(int fd) {
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#ifndef HAVE_WINSOCK2_H
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struct flock lock;
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memset(&lock,0,sizeof(struct flock));
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lock.l_type = F_WRLCK;
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mp_msg(MSGT_STREAM,MSGL_DBG2, "Lock (%d)\n",getpid());
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do {
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if(fcntl(fd,F_SETLKW,&lock)) {
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if(errno == EAGAIN) continue;
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mp_msg(MSGT_STREAM,MSGL_ERR, "Failed to get the lock: %s\n",
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strerror(errno));
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return 0;
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}
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} while(0);
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mp_msg(MSGT_STREAM,MSGL_DBG2, "Locked (%d)\n",getpid());
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#else
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printf("FIXME? should lock here\n");
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#endif
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return 1;
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}
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static int unlock_fd(int fd) {
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#ifndef HAVE_WINSOCK2_H
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struct flock lock;
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memset(&lock,0,sizeof(struct flock));
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lock.l_type = F_UNLCK;
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mp_msg(MSGT_STREAM,MSGL_DBG2, "Unlock (%d)\n",getpid());
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if(fcntl(fd,F_SETLK,&lock)) {
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mp_msg(MSGT_STREAM,MSGL_ERR, "Failed to release the lock: %s\n",
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strerror(errno));
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return 0;
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}
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#else
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printf("FIXME? should unlock here\n");
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#endif
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return 1;
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}
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static mp_net_stream_packet_t* send_net_stream_cmd(stream_t *s,uint16_t cmd,char* data,int len) {
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mp_net_stream_packet_t* pack;
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// Cache is enabled : lock
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if(s->cache_data && !lock_fd(s->fd))
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return NULL;
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// Send a command
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if(!write_packet(s->fd,cmd,data,len)) {
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if(s->cache_data) unlock_fd(s->fd);
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return 0;
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}
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// Read the response
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pack = read_packet(s->fd);
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// Now we can unlock
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if(s->cache_data) unlock_fd(s->fd);
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if(!pack)
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return NULL;
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switch(pack->cmd) {
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case NET_STREAM_OK:
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return pack;
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case NET_STREAM_ERROR:
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if(pack->len > sizeof(mp_net_stream_packet_t))
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mp_msg(MSGT_STREAM,MSGL_ERR, "Fill buffer failed: %s\n",pack->data);
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else
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mp_msg(MSGT_STREAM,MSGL_ERR, "Fill buffer failed\n");
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free(pack);
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return NULL;
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}
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mp_msg(MSGT_STREAM,MSGL_ERR, "Unknown response to %d: %d\n",cmd,pack->cmd);
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free(pack);
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return NULL;
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}
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static int fill_buffer(stream_t *s, char* buffer, int max_len){
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uint16_t len = le2me_16(max_len);
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mp_net_stream_packet_t* pack;
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pack = send_net_stream_cmd(s,NET_STREAM_FILL_BUFFER,(char*)&len,2);
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if(!pack) {
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return -1;
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}
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len = pack->len - sizeof(mp_net_stream_packet_t);
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if(len > max_len) {
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mp_msg(MSGT_STREAM,MSGL_ERR, "Got a too big a packet %d / %d\n",len,max_len);
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free(pack);
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return 0;
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}
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if(len > 0)
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memcpy(buffer,pack->data,len);
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free(pack);
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return len;
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}
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static int seek(stream_t *s,off_t newpos) {
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uint64_t pos = le2me_64((uint64_t)newpos);
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mp_net_stream_packet_t* pack;
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pack = send_net_stream_cmd(s,NET_STREAM_SEEK,(char*)&pos,8);
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if(!pack) {
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return 0;
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}
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s->pos = newpos;
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free(pack);
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return 1;
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}
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static int net_stream_reset(struct stream_st *s) {
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mp_net_stream_packet_t* pack;
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pack = send_net_stream_cmd(s,NET_STREAM_RESET,NULL,0);
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if(!pack) {
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return 0;
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}
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free(pack);
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return 1;
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}
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static int control(struct stream_st *s,int cmd,void* arg) {
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switch(cmd) {
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case STREAM_CTRL_RESET:
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return net_stream_reset(s);
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}
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return STREAM_UNSUPPORTED;
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}
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static void close_s(struct stream_st *s) {
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mp_net_stream_packet_t* pack;
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pack = send_net_stream_cmd(s,NET_STREAM_CLOSE,NULL,0);
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if(pack)
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free(pack);
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}
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static int open_s(stream_t *stream,int mode, void* opts, int* file_format) {
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int f;
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struct stream_priv_s* p = (struct stream_priv_s*)opts;
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mp_net_stream_packet_t* pack;
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mp_net_stream_opened_t* opened;
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if(mode != STREAM_READ)
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return STREAM_UNSUPPORTED;
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if(!p->host) {
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mp_msg(MSGT_OPEN,MSGL_ERR, "We need an host name (ex: mpst://server.net/cdda://5)\n");
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m_struct_free(&stream_opts,opts);
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return STREAM_ERROR;
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}
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if(!p->url || strlen(p->url) == 0) {
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mp_msg(MSGT_OPEN,MSGL_ERR, "We need a remote url (ex: mpst://server.net/cdda://5)\n");
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m_struct_free(&stream_opts,opts);
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return STREAM_ERROR;
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}
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f = connect2Server(p->host,p->port,1);
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if(f < 0) {
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mp_msg(MSGT_OPEN,MSGL_ERR, "Connection to %s:%d failed\n",p->host,p->port);
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m_struct_free(&stream_opts,opts);
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return STREAM_ERROR;
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}
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stream->fd = f;
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/// Now send an open command
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pack = send_net_stream_cmd(stream,NET_STREAM_OPEN,p->url,strlen(p->url) + 1);
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if(!pack) {
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goto error;
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}
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if(pack->len != sizeof(mp_net_stream_packet_t) +
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sizeof(mp_net_stream_opened_t)) {
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mp_msg(MSGT_OPEN,MSGL_ERR, "Invalid open response packet len (%d bytes)\n",pack->len);
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free(pack);
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goto error;
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}
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opened = (mp_net_stream_opened_t*)pack->data;
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net_stream_opened_2_me(opened);
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*file_format = opened->file_format;
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stream->flags = opened->flags;
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stream->sector_size = opened->sector_size;
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stream->start_pos = opened->start_pos;
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stream->end_pos = opened->end_pos;
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stream->fill_buffer = fill_buffer;
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stream->control = control;
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if(stream->flags & STREAM_SEEK)
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stream->seek = seek;
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stream->close = close_s;
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free(pack);
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m_struct_free(&stream_opts,opts);
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return STREAM_OK;
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error:
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closesocket(f);
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m_struct_free(&stream_opts,opts);
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return STREAM_ERROR;
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}
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const stream_info_t stream_info_netstream = {
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"Net stream",
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"netstream",
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"Albeu",
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"",
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open_s,
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{ "mpst",NULL },
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&stream_opts,
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1 // Url is an option string
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};
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