asf_streaming.c

自己移植的linux下的流媒体播放器原代码,支持mms协议,支持ftp和http协议.

				    streaming_ctrl );
	if(r <= 0){
	  if( r < 0) 
	    mp_msg(MSGT_NETWORK,MSGL_ERR,"Error while reading chunk header\n");
	  return -1;
	}
	read += r;
      }
      
      // Endian handling of the stream chunk
      le2me_ASF_stream_chunck_t(&chunk);
      chunk_size = asf_streaming( &chunk, &drop_chunk );
      if(chunk_size < 0) {
	mp_msg(MSGT_NETWORK,MSGL_ERR,"Error while parsing chunk header\n");
	return -1;
      }
      chunk_size -= sizeof(ASF_stream_chunck_t);
	
      if(chunk.type != ASF_STREAMING_HEADER && (!drop_chunk)) {
	if (asf_http_ctrl->packet_size < chunk_size) {
	  mp_msg(MSGT_NETWORK,MSGL_ERR,"Error chunk_size > packet_size\n");
	  return -1;
	}
	waiting = asf_http_ctrl->packet_size;
      } else {
	waiting = chunk_size;
      }

    } else if (rest){
      chunk_size = rest;
      rest = 0;
    }

    read = 0;
    if ( waiting >= chunk_size) {
      if (chunk_size > size){
	rest = chunk_size - size;
	chunk_size = size;
      }
      while(read < chunk_size) {
	int got = nop_streaming_read( fd,buffer+read,chunk_size-read,streaming_ctrl );
	if(got <= 0) {
	  if(got < 0)
	    mp_msg(MSGT_NETWORK,MSGL_ERR,"Error while reading chunk\n");
	  return -1;
	}
	read += got;
      }
      waiting -= read;
      if (drop_chunk) continue;
    }
    if (rest == 0 && waiting > 0 && size-read > 0) {
      int s = MIN(waiting,size-read);
      memset(buffer+read,0,s);
      waiting -= s;
      read += s;
    }
    break;
  }

  return read;
}

int
asf_http_streaming_seek( int fd, off_t pos, streaming_ctrl_t *streaming_ctrl ) {
	return -1;
	// to shut up gcc warning
	fd++;
	pos++;
	streaming_ctrl=NULL;
}

int
asf_header_check( HTTP_header_t *http_hdr ) {
	ASF_obj_header_t *objh;
	if( http_hdr==NULL ) return -1;
	if( http_hdr->body==NULL || http_hdr->body_size<sizeof(ASF_obj_header_t) ) return -1;

	objh = (ASF_obj_header_t*)http_hdr->body;
	if( ASF_LOAD_GUID_PREFIX(objh->guid)==0x75B22630 ) return 0;
	return -1;
}

int
asf_http_streaming_type(char *content_type, char *features, HTTP_header_t *http_hdr ) {
	if( content_type==NULL ) return ASF_Unknown_e;
	if( 	!strcasecmp(content_type, "application/octet-stream") ||
		!strcasecmp(content_type, "application/vnd.ms.wms-hdr.asfv1") ||        // New in Corona, first request
		!strcasecmp(content_type, "application/x-mms-framed") ||                // New in Corana, second request
		!strcasecmp(content_type, "video/x-ms-asf")) {               

		if( strstr(features, "broadcast") ) {
			mp_msg(MSGT_NETWORK,MSGL_V,"=====> ASF Live stream\n");
			return ASF_Live_e;
		} else {
			mp_msg(MSGT_NETWORK,MSGL_V,"=====> ASF Prerecorded\n");
			return ASF_Prerecorded_e;
		}
	} else {
		// Ok in a perfect world, web servers should be well configured
		// so we could used mime type to know the stream type,
		// but guess what? All of them are not well configured.
		// So we have to check for an asf header :(, but it works :p
		if( http_hdr->body_size>sizeof(ASF_obj_header_t) ) {
			if( asf_header_check( http_hdr )==0 ) {
				mp_msg(MSGT_NETWORK,MSGL_V,"=====> ASF Plain text\n");
				return ASF_PlainText_e;
			} else if( (!strcasecmp(content_type, "text/html")) ) {
				mp_msg(MSGT_NETWORK,MSGL_V,"=====> HTML, MPlayer is not a browser...yet!\n");
				return ASF_Unknown_e;
			} else {
				mp_msg(MSGT_NETWORK,MSGL_V,"=====> ASF Redirector\n");
				return ASF_Redirector_e;
			}
		} else {
			if(	(!strcasecmp(content_type, "audio/x-ms-wax")) ||
				(!strcasecmp(content_type, "audio/x-ms-wma")) ||
				(!strcasecmp(content_type, "video/x-ms-asf")) ||
				(!strcasecmp(content_type, "video/x-ms-afs")) ||
				(!strcasecmp(content_type, "video/x-ms-wvx")) ||
				(!strcasecmp(content_type, "video/x-ms-wmv")) ||
				(!strcasecmp(content_type, "video/x-ms-wma")) ) {
				mp_msg(MSGT_NETWORK,MSGL_ERR,"=====> ASF Redirector\n");
				return ASF_Redirector_e;
			} else if( !strcasecmp(content_type, "text/plain") ) {
				mp_msg(MSGT_NETWORK,MSGL_V,"=====> ASF Plain text\n");
				return ASF_PlainText_e;
			} else {
				mp_msg(MSGT_NETWORK,MSGL_V,"=====> ASF unknown content-type: %s\n", content_type );
				return ASF_Unknown_e;
			}
		}
	}
	return ASF_Unknown_e;
}

HTTP_header_t *
asf_http_request(streaming_ctrl_t *streaming_ctrl) {
	HTTP_header_t *http_hdr;
	URL_t *url = NULL;
	URL_t *server_url = NULL;
	asf_http_streaming_ctrl_t *asf_http_ctrl;
	char str[250];
	char *ptr;
	int i, enable;

	int offset_hi=0, offset_lo=0, length=0;
	int asf_nb_stream=0, stream_id;

	// Sanity check
	if( streaming_ctrl==NULL ) return NULL;
	url = streaming_ctrl->url;
	asf_http_ctrl = (asf_http_streaming_ctrl_t*)streaming_ctrl->data;
	if( url==NULL || asf_http_ctrl==NULL ) return NULL;

	// Common header for all requests.
	http_hdr = http_new_header();
	http_set_field( http_hdr, "Accept: */*" );
	http_set_field( http_hdr, "User-Agent: NSPlayer/4.1.0.3856" );
	http_add_basic_authentication( http_hdr, url->username, url->password );

	// Check if we are using a proxy
	if( !strcasecmp( url->protocol, "http_proxy" ) ) {
		server_url = url_new( (url->file)+1 );
		if( server_url==NULL ) {
			mp_msg(MSGT_NETWORK,MSGL_ERR,"Invalid proxy URL\n");
			http_free( http_hdr );
			return NULL;
		}
		http_set_uri( http_hdr, server_url->url );
		sprintf( str, "Host: %.220s:%d", server_url->hostname, server_url->port );
		url_free( server_url );
	} else {
		http_set_uri( http_hdr, url->file );
		sprintf( str, "Host: %.220s:%d", url->hostname, url->port );
	}
	
	http_set_field( http_hdr, str );
	http_set_field( http_hdr, "Pragma: xClientGUID={c77e7400-738a-11d2-9add-0020af0a3278}" );
	sprintf(str, 
		"Pragma: no-cache,rate=1.000000,stream-time=0,stream-offset=%u:%u,request-context=%d,max-duration=%u",
		offset_hi, offset_lo, asf_http_ctrl->request, length );
	http_set_field( http_hdr, str );

	switch( asf_http_ctrl->streaming_type ) {
		case ASF_Live_e:
		case ASF_Prerecorded_e:
			http_set_field( http_hdr, "Pragma: xPlayStrm=1" );
			ptr = str;
			ptr += sprintf( ptr, "Pragma: stream-switch-entry=");
			if(asf_http_ctrl->n_audio > 0) {
				for( i=0; i<asf_http_ctrl->n_audio ; i++ ) {
					stream_id = asf_http_ctrl->audio_streams[i];
					if(stream_id == asf_http_ctrl->audio_id) {
						enable = 0;
					} else {
						enable = 2;
						continue;
					}
					asf_nb_stream++;
					ptr += sprintf(ptr, "ffff:%d:%d ", stream_id, enable);
				}
			}
			if(asf_http_ctrl->n_video > 0) {
				for( i=0; i<asf_http_ctrl->n_video ; i++ ) {
					stream_id = asf_http_ctrl->video_streams[i];
					if(stream_id == asf_http_ctrl->video_id) {
						enable = 0;
					} else {
						enable = 2;
						continue;
					}
					asf_nb_stream++;
					ptr += sprintf(ptr, "ffff:%d:%d ", stream_id, enable);
				}
			}
			http_set_field( http_hdr, str );
			sprintf( str, "Pragma: stream-switch-count=%d", asf_nb_stream );
			http_set_field( http_hdr, str );
			break;
		case ASF_Redirector_e:
			break;
		case ASF_Unknown_e:
			// First request goes here.
			break;
		default:
			mp_msg(MSGT_NETWORK,MSGL_ERR,"Unknown asf stream type\n");
	}

	http_set_field( http_hdr, "Connection: Close" );
	http_build_request( http_hdr );

	return http_hdr;
}

int
asf_http_parse_response(asf_http_streaming_ctrl_t *asf_http_ctrl, HTTP_header_t *http_hdr ) {
	char *content_type, *pragma;
	char features[64] = "\0";
	size_t len;
	if( http_response_parse(http_hdr)<0 ) {
		mp_msg(MSGT_NETWORK,MSGL_ERR,"Failed to parse HTTP response\n");
		return -1;
	}
	switch( http_hdr->status_code ) {
		case 200:
			break;
		case 401: // Authentication required
			return ASF_Authenticate_e;
		default:
			mp_msg(MSGT_NETWORK,MSGL_ERR,"Server return %d:%s\n", http_hdr->status_code, http_hdr->reason_phrase);
			return -1;
	}

	content_type = http_get_field( http_hdr, "Content-Type");
//printf("Content-Type: [%s]\n", content_type);

	pragma = http_get_field( http_hdr, "Pragma");
	while( pragma!=NULL ) {
		char *comma_ptr=NULL;
		char *end;
//printf("Pragma: [%s]\n", pragma );
		// The pragma line can get severals attributes 
		// separeted with a comma ','.
		do {
			if( !strncasecmp( pragma, "features=", 9) ) {
				pragma += 9;
				end = strstr( pragma, "," );
				if( end==NULL ) {
				  size_t s = strlen(pragma);
				  if(s > sizeof(features)) {
				    mp_msg(MSGT_NETWORK,MSGL_WARN,"ASF HTTP PARSE WARNING : Pragma %s cuted from %d bytes to %d\n",pragma,s,sizeof(features));
				    len = sizeof(features);
				  } else {				   
				    len = s;
				  }
				} else { 
				  len = MIN((unsigned int)(end-pragma),sizeof(features));
				}
				strncpy( features, pragma, len );
				features[len]='\0';
				break;
			}
			comma_ptr = strstr( pragma, "," );
			if( comma_ptr!=NULL ) {
				pragma = comma_ptr+1;
				if( pragma[0]==' ' ) pragma++;
			}
		} while( comma_ptr!=NULL );
		pragma = http_get_next_field( http_hdr );
	}
	asf_http_ctrl->streaming_type = asf_http_streaming_type( content_type, features, http_hdr );
	return 0;
}

int
asf_http_streaming_start( stream_t *stream, int *demuxer_type ) {
	HTTP_header_t *http_hdr=NULL;
	URL_t *url = stream->streaming_ctrl->url;
	asf_http_streaming_ctrl_t *asf_http_ctrl;
	char buffer[BUFFER_SIZE];
	int i, ret;
	int fd = stream->fd;
	int done;
	int auth_retry = 0;

	asf_http_ctrl = (asf_http_streaming_ctrl_t*)malloc(sizeof(asf_http_streaming_ctrl_t));
	if( asf_http_ctrl==NULL ) {
		mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed\n");
		return -1;
	}
	asf_http_ctrl->streaming_type = ASF_Unknown_e;
	asf_http_ctrl->request = 1;
	asf_http_ctrl->audio_streams = asf_http_ctrl->video_streams = NULL;
	asf_http_ctrl->n_audio = asf_http_ctrl->n_video = 0;
	stream->streaming_ctrl->data = (void*)asf_http_ctrl;

	do {
		done = 1;
		if( fd>0 ) closesocket( fd );

		if( !strcasecmp( url->protocol, "http_proxy" ) ) {
			if( url->port==0 ) url->port = 8080;
		} else {
			if( url->port==0 ) url->port = 80;
		}
		fd = connect2Server( url->hostname, url->port, 1);
		if( fd<0 ) return fd;

		http_hdr = asf_http_request( stream->streaming_ctrl );
		mp_msg(MSGT_NETWORK,MSGL_DBG2,"Request [%s]\n", http_hdr->buffer );
		for(i=0; i < (int)http_hdr->buffer_size ; ) {
			int r = send( fd, http_hdr->buffer+i, http_hdr->buffer_size-i, 0 );
			if(r <0) {
				mp_msg(MSGT_NETWORK,MSGL_ERR,"Socket write error : %s\n",strerror(errno));
				return -1;
			}
			i += r;
		}       
		http_free( http_hdr );
		http_hdr = http_new_header();
		do {
			i = recv( fd, buffer, BUFFER_SIZE, 0 );
//printf("read: %d\n", i );
			if( i<=0 ) {
				perror("read");
				http_free( http_hdr );
				return -1;
			}
			http_response_append( http_hdr, buffer, i );
		} while( !http_is_header_entire( http_hdr ) );
		if( verbose>0 ) {
			http_hdr->buffer[http_hdr->buffer_size]='\0';
			mp_msg(MSGT_NETWORK,MSGL_DBG2,"Response [%s]\n", http_hdr->buffer );
		}
		ret = asf_http_parse_response(asf_http_ctrl, http_hdr);
		if( ret<0 ) {
			mp_msg(MSGT_NETWORK,MSGL_ERR,"Failed to parse header\n");
			http_free( http_hdr );
			return -1;
		}
		switch( asf_http_ctrl->streaming_type ) {
			case ASF_Live_e:
			case ASF_Prerecorded_e:
			case ASF_PlainText_e:
				if( http_hdr->body_size>0 ) {
					if( streaming_bufferize( stream->streaming_ctrl, http_hdr->body, http_hdr->body_size )<0 ) {
						http_free( http_hdr );
						return -1;
					}
				}
				if( asf_http_ctrl->request==1 ) {
					if( asf_http_ctrl->streaming_type!=ASF_PlainText_e ) {
						// First request, we only got the ASF header.
						ret = asf_streaming_parse_header(fd,stream->streaming_ctrl);
						if(ret < 0) return -1;
						if(asf_http_ctrl->n_audio == 0 && asf_http_ctrl->n_video == 0) {
							mp_msg(MSGT_NETWORK,MSGL_ERR,"No stream found\n");
							return -1;
						}
						asf_http_ctrl->request++;
						done = 0;
					} else {
						done = 1;
					}
				}
				break;
			case ASF_Redirector_e:
				if( http_hdr->body_size>0 ) {
					if( streaming_bufferize( stream->streaming_ctrl, http_hdr->body, http_hdr->body_size )<0 ) {
						http_free( http_hdr );
						return -1;
					}
				}
				*demuxer_type = DEMUXER_TYPE_PLAYLIST;
				done = 1;
				break;
			case ASF_Authenticate_e:
				if( http_authenticate( http_hdr, url, &auth_retry)<0 ) return -1;
				asf_http_ctrl->streaming_type = ASF_Unknown_e;
				done = 0;
				break;
			case ASF_Unknown_e:
			default:
				mp_msg(MSGT_NETWORK,MSGL_ERR,"Unknown ASF streaming type\n");
				closesocket(fd);
				http_free( http_hdr );
				return -1;
		}
	// Check if we got a redirect.	
	} while(!done);

	stream->fd = fd;
	if( asf_http_ctrl->streaming_type==ASF_PlainText_e || asf_http_ctrl->streaming_type==ASF_Redirector_e ) {
		stream->streaming_ctrl->streaming_read = nop_streaming_read;
		stream->streaming_ctrl->streaming_seek = nop_streaming_seek;
	} else {
		stream->streaming_ctrl->streaming_read = asf_http_streaming_read;
		stream->streaming_ctrl->streaming_seek = asf_http_streaming_seek;
		stream->streaming_ctrl->buffering = 1;
	}
	stream->streaming_ctrl->status = streaming_playing_e;

	http_free( http_hdr );
	return 0;
}