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mpv/playtreeparser.c

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#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef MP_DEBUG
#include <assert.h>
#endif
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "playtree.h"
#include "playtreeparser.h"
#include "libmpdemux/stream.h"
#include "mp_msg.h"
extern play_tree_t*
asx_parser_build_tree(char* buffer, int ref);
play_tree_t*
parse_asx(play_tree_parser_t* p) {
int r;
int comments = 0,read = 1,eof = 0;
mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying asx...\n");
while(1) {
if(read && eof) // Eof reached before anything useful
return NULL;
if(read) {
if(p->buffer_size - p->buffer_end < 50) p->buffer_size += 255;
p->buffer = (char*)realloc(p->buffer,p->buffer_size*sizeof(char));
if(p->buffer == NULL) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Can't allocate %d bytes of memory\n",p->buffer_size*sizeof(char));
p->buffer_size = p->buffer_end = 0;
return NULL;
}
r = stream_read(p->stream,p->buffer+p->buffer_end,p->buffer_size-p->buffer_end-1);
if(r < 0) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Can't read from stream r=%d\n",r);
return NULL;
} else if(r == 0)
eof = 1;
p->buffer_end += r;
p->buffer[p->buffer_end] = '\0';
}
if(comments) { // Jump comments
int e;
char* end = strstr(p->buffer,"-->");
if(!end) {
if(p->buffer[p->buffer_end-1] != '-')
p->buffer_end = 0; // Drop buffer content if last char isn't '-'
continue;
}
comments = 0;
e = end - p->buffer + 3;
if(e >= p->buffer_end) { // > seems impossible
p->buffer_end = 0; // Drop buffer content
read = 1;
continue;
}
p->buffer_end -= e;
memmove(p->buffer,end+3,p->buffer_end); // Drop comments
continue;
}
for(r= 0 ; r < p->buffer_end ; r++) {
if(strchr(" \n\r\t",p->buffer[r]) != NULL) // Jump space
continue;
if(p->buffer[r] != '<') {
mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"First char isn't '<' but '%c'\n",p->buffer[r]);
mp_msg(MSGT_PLAYTREE,MSGL_DBG3,"Buffer = [%s]\n",p->buffer);
return NULL;
}
break; // Stop on first '<'
}
if(r > p->buffer_end-4) { // We need more
if(r > 0) { // Drop unuseful beggining
p->buffer_end -= r;
memmove(p->buffer,&p->buffer[r],p->buffer_end);
}
read = 1;
continue;
}
if(strncmp(&p->buffer[r],"<!--",4) == 0) { // Comments
read = 0;
comments = 1;
continue;
}
if(strncasecmp(&p->buffer[r],"<ASX",4) != 0) // First element is not a comment nor an asx : end
return NULL;
mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected asx format\n");
break;
}
// We have an asx : load it in memory and parse
while(!eof) {
if(p->buffer_size - p->buffer_end < 50) p->buffer_size += 255;
p->buffer = (char*)realloc(p->buffer,p->buffer_size*sizeof(char));
if(p->buffer == NULL) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Can't allocate %d bytes of memory\n",p->buffer_size*sizeof(char));
p->buffer_size = p->buffer_end = 0;
return NULL;
}
r = stream_read(p->stream,p->buffer+p->buffer_end,p->buffer_size-p->buffer_end-1);
if(r > 0)
p->buffer_end += r;
if(r <= 0)
break;
p->buffer[p->buffer_end] = '\0';
}
mp_msg(MSGT_PLAYTREE,MSGL_DBG3,"Parsing asx file : [%s]\n",p->buffer);
return asx_parser_build_tree(p->buffer,p->deep);
}
play_tree_t*
parse_textplain(play_tree_parser_t* p) {
char* end;
char* file;
int eof = 0,r,p_end=-1,resize = 0;
play_tree_t *list = NULL, *entry = NULL;
mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying plaintext...\n");
if(p->buffer_size < 255 && ! p->stream->eof) {
p->buffer_size = 255;
p->buffer = (char*)realloc(p->buffer,p->buffer_size*sizeof(char));
if(p->buffer == NULL) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Can't allocate %d bytes of memory\n",p->buffer_size*sizeof(char));
p->buffer_size = p->buffer_end = 0;
return NULL;
}
}
while(!eof) {
if(resize) {
p->buffer_size += 255;
p->buffer = (char*)realloc(p->buffer,p->buffer_size*sizeof(char));
resize = 0;
if(p->buffer == NULL) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Can't allocate %d bytes of memory\n",p->buffer_size*sizeof(char));
p->buffer_size = p->buffer_end = 0;
if(list) play_tree_free_list(list,1);
return NULL;
}
}
if(!p->stream->eof) {
r = stream_read(p->stream,p->buffer+p->buffer_end,p->buffer_size-p->buffer_end-1);
if(r < 0) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Can't read from stream r=%d\n",r);
return NULL;
} else if(r == 0)
eof = 1;
p->buffer_end += r;
p->buffer[p->buffer_end] = '\0';
} else eof = 1;
r = 0;
while(1) {
p_end = r;
for( ; p->buffer[r] != '\0' ; r++) {
if(strchr(" \n\r\t",p->buffer[r]) != NULL)
continue;
break;
}
if(p->buffer[r] == '\0') {
p_end = r;
if(!eof)
resize = 1;
break;
}
end = strchr(&p->buffer[r],'\n');
if(!end) {
if(!eof) {
p_end = r;
if(p_end == 0) {
resize = 1;
}
break;
}
entry = play_tree_new();
play_tree_add_file(entry,&p->buffer[r]);
r = p->buffer_end;
}
else {
if(r > 0 && p->buffer[r-1] == '\r') r--;
file = (char*)malloc((end-(&p->buffer[r])+1)*sizeof(char));
if(file == NULL) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Can't allocate %d bytes of memory\n",p->buffer_size*sizeof(char));
p->buffer_size = p->buffer_end = 0;
if(list) play_tree_free_list(list,1);
return NULL;
}
// TODO : Check if the given file exist and is readable (or it'a an url)
strncpy(file,&p->buffer[r],end-(&p->buffer[r]));
file[end-(&p->buffer[r])] = '\0';
entry = play_tree_new();
play_tree_add_file(entry,file);
free(file);
r += end-(&p->buffer[r]);
p_end = r;
}
if(entry) {
mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"Adding file %s to playlist\n",entry->files[0]);
if(list) play_tree_append_entry(list,entry);
else list = entry;
entry = NULL;
}
}
if(!eof && p_end > 0 && p_end < p->buffer_end) {
memmove(p->buffer,&p->buffer[p_end],p->buffer_end-p_end);
p->buffer_end -= p_end;
} else if(!eof && !resize && p_end == p->buffer_end) {
p->buffer_end = 0;
p->buffer[0] = '\0';
}
}
if(!list) return NULL;
entry = play_tree_new();
play_tree_set_child(entry,list);
return entry;
}
play_tree_t*
parse_playtree(stream_t *stream) {
play_tree_parser_t* p;
play_tree_t* ret;
#ifdef MP_DEBUG
assert(stream != NULL);
assert(stream->type == STREAMTYPE_PLAYLIST);
#endif
p = play_tree_parser_new(stream,0);
if(!p)
return NULL;
ret = play_tree_parser_get_play_tree(p);
play_tree_parser_free(p);
return ret;
}
play_tree_t*
parse_playlist_file(char* file) {
stream_t *stream;
play_tree_t* ret;
int fd;
if(!strcmp(file,"-"))
fd = 0;
else
fd = open(file,O_RDONLY);
if(fd < 0) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Error while opening playlist file %s : %s\n",file,strerror(errno));
return NULL;
}
mp_msg(MSGT_PLAYTREE,MSGL_V,"Parsing playlist file %s...\n",file);
stream = new_stream(fd,STREAMTYPE_PLAYLIST);
ret = parse_playtree(stream);
if(close(fd) < 0)
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Warning error while closing playlist file %s : %s\n",file,strerror(errno));
free_stream(stream);
return ret;
}
play_tree_parser_t*
play_tree_parser_new(stream_t* stream,int deep) {
play_tree_parser_t* p;
p = (play_tree_parser_t*)calloc(1,sizeof(play_tree_parser_t));
if(!p)
return NULL;
p->stream = stream;
p->deep = deep;
return p;
}
void
play_tree_parser_free(play_tree_parser_t* p) {
#ifdef MP_DEBUG
assert(p != NULL);
#endif
if(p->buffer) free(p->buffer);
free(p->buffer);
}
play_tree_t*
play_tree_parser_get_play_tree(play_tree_parser_t* p) {
play_tree_t* tree = NULL;
#ifdef MP_DEBUG
assert(p != NULL);
#endif
while(1) {
tree = parse_asx(p);
if(tree) break;
// Here come the others formats ( textplain must stay the last one )
tree = parse_textplain(p);
if(tree) break;
break;
}
if(tree)
mp_msg(MSGT_PLAYTREE,MSGL_V,"Playlist succefully parsed\n");
else mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Error while parsing playlist\n");
if(tree)
tree = play_tree_cleanup(tree);
if(!tree) mp_msg(MSGT_PLAYTREE,MSGL_WARN,"Warning empty playlist\n");
if(p->buffer) free(p->buffer);
p->buffer = NULL;
p->buffer_end = p->buffer_size = 0;
return tree;
}