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mpv/libmpdemux/asf_streaming.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "config.h"
#include "url.h"
#include "http.h"
#include "asf.h"
#include "stream.h"
#include "network.h"
typedef struct {
ASF_StreamType_e streaming_type;
int request;
int packet_size;
int *audio_streams,n_audio,*video_streams,n_video;
} asf_http_streaming_ctrl_t;
#ifdef ARCH_X86
#define ASF_LOAD_GUID_PREFIX(guid) (*(uint32_t *)(guid))
#else
#define ASF_LOAD_GUID_PREFIX(guid) \
((guid)[3] << 24 | (guid)[2] << 16 | (guid)[1] << 8 | (guid)[0])
#endif
extern int audio_id,video_id;
extern int verbose;
// ASF streaming support several network protocol.
// One use UDP, not known, yet!
// Another is HTTP, this one is known.
// So for now, we use the HTTP protocol.
//
// We can try several protocol for asf streaming
// * first the UDP protcol, if there is a firewall, UDP
// packets will not come back, so the mmsu will failed.
// * Then we can try TCP, but if there is a proxy for
// internet connection, the TCP connection will not get
// through
// * Then we can try HTTP.
int
asf_streaming_start( stream_t *stream ) {
char proto_s[10];
int fd = -1;
strncpy( proto_s, stream->streaming_ctrl->url->protocol, 10 );
if( !strncasecmp( proto_s, "mms", 3) && strncasecmp( proto_s, "mmst", 4) ) {
printf("Trying ASF/UDP...\n");
//fd = asf_mmsu_streaming_start( stream );
if( fd!=-1 ) return fd;
printf(" ===> ASF/UDP failed\n");
}
if( !strncasecmp( proto_s, "mms", 3) ) {
printf("Trying ASF/TCP...\n");
//fd = asf_mmst_streaming_start( stream );
if( fd!=-1 ) return fd;
printf(" ===> ASF/TCP failed\n");
}
if( !strncasecmp( proto_s, "http", 4) ||
!strncasecmp( proto_s, "mms", 3) ||
!strncasecmp( proto_s, "http_proxy", 10)
) {
printf("Trying ASF/HTTP...\n");
fd = asf_http_streaming_start( stream );
if( fd!=-1 ) return fd;
printf(" ===> ASF/HTTP failed\n");
}
printf("Unknown protocol: %s\n", proto_s );
return -1;
}
int
asf_streaming(ASF_stream_chunck_t *stream_chunck, int *drop_packet ) {
/*
printf("ASF stream chunck size=%d\n", stream_chunck->size);
printf("length: %d\n", length );
printf("0x%02X\n", stream_chunck->type );
*/
if( drop_packet!=NULL ) *drop_packet = 0;
if( stream_chunck->size<8 ) {
printf("Ahhhh, stream_chunck size is too small: %d\n", stream_chunck->size);
return -1;
}
if( stream_chunck->size!=stream_chunck->size_confirm ) {
printf("size_confirm mismatch!: %d %d\n", stream_chunck->size, stream_chunck->size_confirm);
return -1;
}
/*
printf(" type: 0x%02X\n", stream_chunck->type );
printf(" size: %d (0x%02X)\n", stream_chunck->size, stream_chunck->size );
printf(" sequence_number: 0x%04X\n", stream_chunck->sequence_number );
printf(" unknown: 0x%02X\n", stream_chunck->unknown );
printf(" size_confirm: 0x%02X\n", stream_chunck->size_confirm );
*/
switch(stream_chunck->type) {
case 0x4324: // $C Clear ASF configuration
printf("=====> Clearing ASF stream configuration!\n");
if( drop_packet!=NULL ) *drop_packet = 1;
return stream_chunck->size;
break;
case 0x4424: // $D Data follows
// printf("=====> Data follows\n");
break;
case 0x4524: // $E Transfer complete
printf("=====> Transfer complete\n");
if( drop_packet!=NULL ) *drop_packet = 1;
return stream_chunck->size;
break;
case 0x4824: // $H ASF header chunk follows
printf("=====> ASF header chunk follows\n");
break;
default:
printf("=====> Unknown stream type 0x%x\n", stream_chunck->type );
}
return stream_chunck->size+4;
}
static int
asf_streaming_parse_header(int fd, streaming_ctrl_t* streaming_ctrl) {
ASF_header_t asfh;
ASF_obj_header_t objh;
ASF_file_header_t fileh;
ASF_stream_header_t streamh;
ASF_stream_chunck_t chunk;
asf_http_streaming_ctrl_t* asf_ctrl = (asf_http_streaming_ctrl_t*) streaming_ctrl->data;
char* buffer=NULL, *chunk_buffer=NULL;
int i,r,size,pos = 0;
int buffer_size = 0;
int chunk_size2read = 0;
if(asf_ctrl == NULL) return -1;
// The ASF header can be in several network chunks. For example if the content description
// is big, the ASF header will be split in 2 network chunk.
// So we need to retrieve all the chunk before starting to parse the header.
do {
for( r=0; r < sizeof(ASF_stream_chunck_t) ; ) {
i = nop_streaming_read(fd,((char*)&chunk)+r,sizeof(ASF_stream_chunck_t) - r,streaming_ctrl);
if(i <= 0) return -1;
r += i;
}
size = asf_streaming( &chunk, &r) - sizeof(ASF_stream_chunck_t);
if(r) printf("Warning : drop header ????\n");
if(size < 0){
printf("Error while parsing chunk header\n");
return -1;
}
if (chunk.type != 0x4824) {
printf("Don't got a header as first chunk !!!!\n");
return -1;
}
buffer = (char*) malloc(size+buffer_size);
if(buffer == NULL) {
printf("Error can't allocate %d bytes buffer\n",size+buffer_size);
return -1;
}
if( chunk_buffer!=NULL ) {
memcpy( buffer, chunk_buffer, buffer_size );
free( chunk_buffer );
}
chunk_buffer = buffer;
buffer += buffer_size;
buffer_size += size;
for(r = 0; r < size;) {
i = nop_streaming_read(fd,buffer+r,size-r,streaming_ctrl);
if(i < 0) {
printf("Error while reading network stream\n");
return -1;
}
r += i;
}
if( chunk_size2read==0 ) {
if(size < (int)sizeof(asfh)) {
printf("Error chunk is too small\n");
return -1;
} else printf("Got chunk\n");
memcpy(&asfh,buffer,sizeof(asfh));
le2me_ASF_header_t(&asfh);
chunk_size2read = asfh.objh.size;
printf("Size 2 read=%d\n", chunk_size2read);
}
} while( buffer_size<chunk_size2read);
buffer = chunk_buffer;
size = buffer_size;
if(asfh.cno > 256) {
printf("Error sub chunks number is invalid\n");
return -1;
}
pos += sizeof(asfh);
while(size - pos >= (int)sizeof(objh)) {
memcpy(&objh,buffer+pos,sizeof(objh));
le2me_ASF_obj_header_t(&objh);
switch(ASF_LOAD_GUID_PREFIX(objh.guid)) {
case 0x8CABDCA1 : // File header
pos += sizeof(objh);
memcpy(&fileh,buffer + pos,sizeof(fileh));
le2me_ASF_file_header_t(&fileh);
/*
if(fileh.packetsize != fileh.packetsize2) {
printf("Error packetsize check don't match\n");
return -1;
}
*/
asf_ctrl->packet_size = fileh.max_packet_size;
// before playing.
// preroll: time in ms to bufferize before playing
streaming_ctrl->prebuffer_size = (unsigned int)((double)((double)fileh.preroll/1000)*((double)fileh.max_bitrate/8));
pos += sizeof(fileh);
break;
case 0xB7DC0791 : // stream header
pos += sizeof(objh);
memcpy(&streamh,buffer + pos,sizeof(streamh));
le2me_ASF_stream_header_t(&streamh);
pos += sizeof(streamh) + streamh.type_size;
switch(ASF_LOAD_GUID_PREFIX(streamh.type)) {
case 0xF8699E40 : // audio stream
if(asf_ctrl->audio_streams == NULL){
asf_ctrl->audio_streams = (int*)malloc(sizeof(int));
asf_ctrl->n_audio = 1;
} else {
asf_ctrl->n_audio++;
asf_ctrl->audio_streams = (int*)realloc(asf_ctrl->audio_streams,
asf_ctrl->n_audio*sizeof(int));
}
asf_ctrl->audio_streams[asf_ctrl->n_audio-1] = streamh.stream_no;
pos += streamh.stream_size;
break;
case 0xBC19EFC0 : // video stream
if(asf_ctrl->video_streams == NULL){
asf_ctrl->video_streams = (int*)malloc(sizeof(int));
asf_ctrl->n_video = 1;
} else {
asf_ctrl->n_video++;
asf_ctrl->video_streams = (int*)realloc(asf_ctrl->video_streams,
asf_ctrl->n_video*sizeof(int));
}
asf_ctrl->video_streams[asf_ctrl->n_video-1] = streamh.stream_no;
break;
}
break;
default :
pos += objh.size;
break;
}
}
free(buffer);
return 1;
}
int
asf_http_streaming_read( int fd, char *buffer, int size, streaming_ctrl_t *streaming_ctrl ) {
static ASF_stream_chunck_t chunk;
int read,chunk_size = 0;
static int rest = 0, drop_chunk = 0, waiting = 0,eof= 0;
asf_http_streaming_ctrl_t *asf_http_ctrl = (asf_http_streaming_ctrl_t*)streaming_ctrl->data;
while(1) {
if (rest == 0 && waiting == 0) {
read = 0;
while(read < (int)sizeof(ASF_stream_chunck_t)){
int r = nop_streaming_read( fd, ((char*)&chunk) + read,
sizeof(ASF_stream_chunck_t)-read,
streaming_ctrl );
if(r <= 0){
if( r < 0)
printf("Error while reading chunk header\n");
return -1;
}
read += r;
}
chunk_size = asf_streaming( &chunk, &drop_chunk );
if(chunk_size < 0) {
printf("Error while parsing chunk header\n");
return -1;
}
chunk_size -= sizeof(ASF_stream_chunck_t);
if(chunk.type != 0x4824 && (!drop_chunk)) {
if (asf_http_ctrl->packet_size < chunk_size) {
printf("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)
printf("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;
}
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") ) {
if( features==NULL ) {
printf("=====> ASF Prerecorded\n");
return ASF_Prerecorded_e;
} else if( strstr(features, "broadcast")) {
printf("=====> ASF Live stream\n");
return ASF_Live_e;
} else {
printf("=====> 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 ) {
printf("=====> ASF Plain text\n");
return ASF_PlainText_e;
} else {
printf("=====> 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")) ) {
printf("=====> ASF Redirector\n");
return ASF_Redirector_e;
} else if( !strcasecmp(content_type, "text/plain") ) {
printf("=====> ASF Plain text\n");
return ASF_PlainText_e;
} else {
printf("=====> 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,as = -1,vs = -1;
int offset_hi=0, offset_lo=0, length=0;
int asf_nb_stream=0;
// 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" );
// Check if we are using a proxy
if( !strcasecmp( url->protocol, "http_proxy" ) ) {
server_url = url_new( (url->file)+1 );
if( server_url==NULL ) {
printf("Invalid proxy URL\n");
http_free( http_hdr );
return NULL;
}
http_set_uri( http_hdr, server_url->url );
sprintf( str, "Host: %s:%d", server_url->hostname, server_url->port );
url_free( server_url );
} else {
http_set_uri( http_hdr, url->file );
sprintf( str, "Host: %s:%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) {
if(audio_id > 0) {
for( i=0; i<asf_http_ctrl->n_audio ; i++ ) {
if(asf_http_ctrl->audio_streams[i] == audio_id) {
as = audio_id;
break;
}
}
}
if(as < 0) {
if(audio_id > 0)
printf("Audio stream %d don't exist\n", as);
as = asf_http_ctrl->audio_streams[0];
}
ptr += sprintf(ptr, " ffff:%d:0",as);
asf_nb_stream++;
}
if(asf_http_ctrl->n_video > 0) {
if(video_id > 0) {
for( i=0; i<asf_http_ctrl->n_video ; i++ ) {
if(asf_http_ctrl->video_streams[i] == video_id) {
vs = video_id;
break;
}
}
}
if(vs < 0) {
if(video_id > 0)
printf("Video stream %d don't exist\n",vs);
vs = asf_http_ctrl->video_streams[0];
}
ptr += sprintf( ptr, " ffff:%d:0",vs);
asf_nb_stream++;
}
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:
printf("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( HTTP_header_t *http_hdr ) {
char *content_type, *pragma;
char features[64] = "\0";
int len;
if( http_response_parse(http_hdr)<0 ) {
printf("Failed to parse HTTP response\n");
return -1;
}
if( http_hdr->status_code!=200 ) {
printf("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 ) {
int s = strlen(pragma);
if(s > sizeof(features)) {
printf("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(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 );
}
return asf_http_streaming_type( content_type, features, http_hdr );
}
int
asf_http_streaming_start( stream_t *stream ) {
HTTP_header_t *http_hdr=NULL;
URL_t *url_next=NULL;
URL_t *url = stream->streaming_ctrl->url;
asf_http_streaming_ctrl_t *asf_http_ctrl;
ASF_StreamType_e streaming_type;
char buffer[BUFFER_SIZE];
int i, ret;
int fd = stream->fd;
int done;
asf_http_ctrl = (asf_http_streaming_ctrl_t*)malloc(sizeof(asf_http_streaming_ctrl_t));
if( asf_http_ctrl==NULL ) {
printf("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 ) close( 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 );
if( fd<0 ) return -1;
http_hdr = asf_http_request( stream->streaming_ctrl );
if( verbose>0 ) {
printf("Request [%s]\n", http_hdr->buffer );
}
for(i=0; i < http_hdr->buffer_size ; ) {
int r = write( fd, http_hdr->buffer+i, http_hdr->buffer_size-i );
if(r <0) {
printf("Socket write error : %s\n",strerror(errno));
return -1;
}
i += r;
}
http_free( http_hdr );
http_hdr = http_new_header();
do {
i = read( fd, buffer, BUFFER_SIZE );
//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';
printf("Response [%s]\n", http_hdr->buffer );
}
streaming_type = asf_http_parse_response(http_hdr);
if( streaming_type<0 ) {
printf("Failed to parse header\n");
http_free( http_hdr );
return -1;
}
asf_http_ctrl->streaming_type = streaming_type;
switch( 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( 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) {
printf("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;
}
}
stream->type = STREAMTYPE_PLAYLIST;
done = 1;
break;
case ASF_Unknown_e:
default:
printf("Unknown ASF streaming type\n");
close(fd);
http_free( http_hdr );
return -1;
}
// Check if we got a redirect.
} while(!done);
stream->fd = fd;
if( streaming_type==ASF_PlainText_e || 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;
}
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