mirror of https://github.com/mpv-player/mpv
457 lines
10 KiB
C
457 lines
10 KiB
C
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef MP_DEBUG
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#include <assert.h>
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#endif
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#include <errno.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 "playtree.h"
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#include "playtreeparser.h"
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#include "libmpdemux/stream.h"
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#include "mp_msg.h"
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extern play_tree_t*
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asx_parser_build_tree(char* buffer, int ref);
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#define BUF_STEP 1024
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#define WHITES " \n\r\t"
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static void
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strstrip(char* str) {
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char* i;
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for(i = str ; i[0] != '\0' && strchr(WHITES,i[0]) != NULL; i++)
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/* NOTHING */;
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if(i[0] != '\0') {
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memmove(str,i,strlen(i));
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for(i = str + strlen(str) ; strchr(WHITES,i[0]) != NULL; i--)
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/* NOTHING */;
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i[1] = '\0';
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} else
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str[0] = '\0';
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}
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static char*
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play_tree_parser_get_line(play_tree_parser_t* p) {
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char *end,*line_end;
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int r,resize = 0;
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if(p->buffer == NULL) {
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p->buffer = (char*)malloc(BUF_STEP);
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p->buffer_size = BUF_STEP;
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p->iter = p->buffer;
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}
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if(p->stream->eof && p->buffer_end == 0)
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return NULL;
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while(1) {
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if(resize) {
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r = p->iter - p->buffer;
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p->buffer = (char*)realloc(p->buffer,p->buffer_size+BUF_STEP);
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p->iter = p->buffer + r;
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p->buffer_size += BUF_STEP;
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resize = 0;
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}
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if(p->buffer_size - p->buffer_end > 1 && ! p->stream->eof) {
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r = stream_read(p->stream,p->buffer + p->buffer_end,p->buffer_size - p->buffer_end - 1);
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if(r > 0) {
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p->buffer_end += r;
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p->buffer[p->buffer_end] = '\0';
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}
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}
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end = strchr(p->iter,'\n');
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if(!end) {
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if(p->stream->eof) {
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end = p->buffer + p->buffer_end;
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break;
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}
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resize = 1;
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continue;
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}
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break;
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}
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line_end = ((*(end-1)) == '\r') ? end-1 : end;
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p->line = (char*)realloc(p->line,line_end - p->iter+1);
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if(!p->line)
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return NULL;
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strncpy(p->line,p->iter,line_end - p->iter);
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p->line[line_end - p->iter] = '\0';
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if(end != '\0')
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end++;
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if(!p->keep) {
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if(end[0] != '\0') {
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p->buffer_end -= end-p->iter;
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memmove(p->buffer,end,p->buffer_end);
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} else
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p->buffer_end = 0;
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p->iter = p->buffer;
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} else
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p->iter = end;
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return p->line;
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}
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static void
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play_tree_parser_reset(play_tree_parser_t* p) {
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p->iter = p->buffer;
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}
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static void
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play_tree_parser_stop_keeping(play_tree_parser_t* p) {
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p->keep = 0;
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if(p->iter && p->iter != p->buffer) {
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p->buffer_end -= p->iter -p->buffer;
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if(p->buffer_end)
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memmove(p->buffer,p->iter,p->buffer_end);
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p->iter = p->buffer;
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}
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}
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play_tree_t*
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parse_asx(play_tree_parser_t* p) {
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int comments = 0,get_line = 1;
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char* line = NULL;
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mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying asx...\n");
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while(1) {
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if(get_line) {
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line = play_tree_parser_get_line(p);
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if(!line)
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return NULL;
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strstrip(line);
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if(line[0] == '\0')
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continue;
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}
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if(!comments) {
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if(line[0] != '<') {
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mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"First char isn't '<' but '%c'\n",line[0]);
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mp_msg(MSGT_PLAYTREE,MSGL_DBG3,"Buffer = [%s]\n",p->buffer);
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return NULL;
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} else if(strncmp(line,"<!--",4) == 0) { // Comments
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comments = 1;
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line += 4;
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if(line[0] != '\0' && strlen(line) > 0)
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get_line = 0;
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} else if(strncasecmp(line,"<ASX",4) == 0) // We got an asx element
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break;
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else // We don't get an asx
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return NULL;
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} else { // Comments
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char* c;
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c = strchr(line,'-');
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if(c) {
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if (strncmp(c,"--!>",4) == 0) { // End of comments
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comments = 0;
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line = c+4;
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if(line[0] != '\0') // There is some more data on this line : keep it
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get_line = 0;
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} else {
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line = c+1; // Jump the -
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if(line[0] != '\0') // Some more data
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get_line = 0;
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else // End of line
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get_line = 1;
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}
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} else // No - on this line (or rest of line) : get next one
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get_line = 1;
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}
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}
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mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected asx format\n");
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// We have an asx : load it in memory and parse
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while((line = play_tree_parser_get_line(p)) != NULL)
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/* NOTHING */;
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mp_msg(MSGT_PLAYTREE,MSGL_DBG3,"Parsing asx file : [%s]\n",p->buffer);
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return asx_parser_build_tree(p->buffer,p->deep);
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}
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static char*
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pls_entry_get_value(char* line) {
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char* i;
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i = strchr(line,'=');
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if(!i || i[1] == '\0')
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return NULL;
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else
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return i+1;
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}
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typedef struct pls_entry {
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char* file;
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char* title;
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char* length;
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} pls_entry_t;
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static int
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pls_read_entry(char* line,pls_entry_t** _e,int* _max_entry,char** val) {
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int num,max_entry = (*_max_entry);
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pls_entry_t* e = (*_e);
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char* v;
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v = pls_entry_get_value(line);
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if(!v) {
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mp_msg(MSGT_PLAYTREE,MSGL_ERR,"No value in entry %s\n",line);
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return 0;
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}
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num = atoi(line);
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if(num < 0) {
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num = max_entry+1;
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mp_msg(MSGT_PLAYTREE,MSGL_WARN,"No entry index in entry %s\nAssuming %d\n",line,num);
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}
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if(num > max_entry) {
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e = (pls_entry_t*)realloc(e,num*sizeof(pls_entry_t));
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memset(&e[max_entry],0,(num-max_entry)*sizeof(pls_entry_t));
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max_entry = num;
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}
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(*_e) = e;
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(*_max_entry) = max_entry;
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(*val) = v;
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return num;
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}
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play_tree_t*
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parse_pls(play_tree_parser_t* p) {
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char *line,*v;
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pls_entry_t* entries = NULL;
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int n_entries = 0,max_entry=0,num;
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play_tree_t *list = NULL, *entry = NULL;
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mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying winamp playlist...\n");
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line = play_tree_parser_get_line(p);
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strstrip(line);
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if(strcasecmp(line,"[playlist]"))
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return NULL;
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mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected winamp playlist format\n");
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play_tree_parser_stop_keeping(p);
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line = play_tree_parser_get_line(p);
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if(!line)
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return NULL;
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strstrip(line);
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if(strncasecmp(line,"NumberOfEntries",15) == 0) {
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v = pls_entry_get_value(line);
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n_entries = atoi(v);
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if(n_entries < 0)
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mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"Invalid number of entries : very funny !!!\n");
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else
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mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"Playlist claim to have %d entries. Let's see.\n",n_entries);
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line = play_tree_parser_get_line(p);
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}
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while(line) {
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strstrip(line);
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if(line[0] == '\0') {
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line = play_tree_parser_get_line(p);
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continue;
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}
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if(strncasecmp(line,"File",4) == 0) {
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num = pls_read_entry(line+4,&entries,&max_entry,&v);
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if(num < 0)
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mp_msg(MSGT_PLAYTREE,MSGL_ERR,"No value in entry %s\n",line);
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else
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entries[num-1].file = strdup(v);
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} else if(strncasecmp(line,"Title",5) == 0) {
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num = pls_read_entry(line+5,&entries,&max_entry,&v);
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if(num < 0)
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mp_msg(MSGT_PLAYTREE,MSGL_ERR,"No value in entry %s\n",line);
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else
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entries[num-1].title = strdup(v);
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} else if(strncasecmp(line,"Length",6) == 0) {
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num = pls_read_entry(line+6,&entries,&max_entry,&v);
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if(num < 0)
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mp_msg(MSGT_PLAYTREE,MSGL_ERR,"No value in entry %s\n",line);
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else
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entries[num-1].length = strdup(v);
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} else
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mp_msg(MSGT_PLAYTREE,MSGL_WARN,"Unknow entry type %s\n",line);
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line = play_tree_parser_get_line(p);
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}
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for(num = 0; num < max_entry ; num++) {
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if(entries[num].file == NULL)
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mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Entry %d don't have a file !!!!\n",num+1);
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else {
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entry = play_tree_new();
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play_tree_add_file(entry,entries[num].file);
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free(entries[num].file);
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if(list)
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play_tree_append_entry(list,entry);
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else
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list = entry;
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}
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if(entries[num].title) {
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// When we have info in playtree we add this info
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free(entries[num].title);
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}
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if(entries[num].length) {
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// When we have info in playtree we add this info
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free(entries[num].length);
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}
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}
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free(entries);
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return list;
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}
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play_tree_t*
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parse_textplain(play_tree_parser_t* p) {
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char* line;
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play_tree_t *list = NULL, *entry = NULL;
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mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying plaintext...\n");
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play_tree_parser_stop_keeping(p);
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while((line = play_tree_parser_get_line(p)) != NULL) {
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strstrip(line);
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if(line[0] == '\0')
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continue;
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entry = play_tree_new();
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play_tree_add_file(entry,line);
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if(!list)
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list = entry;
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else
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play_tree_append_entry(list,entry);
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}
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if(!list) return NULL;
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entry = play_tree_new();
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play_tree_set_child(entry,list);
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return entry;
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}
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play_tree_t*
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parse_playtree(stream_t *stream) {
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play_tree_parser_t* p;
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play_tree_t* ret;
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#ifdef MP_DEBUG
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assert(stream != NULL);
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assert(stream->type == STREAMTYPE_PLAYLIST);
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#endif
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p = play_tree_parser_new(stream,0);
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if(!p)
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return NULL;
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ret = play_tree_parser_get_play_tree(p);
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play_tree_parser_free(p);
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return ret;
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}
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play_tree_t*
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parse_playlist_file(char* file) {
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stream_t *stream;
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play_tree_t* ret;
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int fd;
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if(!strcmp(file,"-"))
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fd = 0;
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else
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fd = open(file,O_RDONLY);
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if(fd < 0) {
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mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Error while opening playlist file %s : %s\n",file,strerror(errno));
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return NULL;
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}
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mp_msg(MSGT_PLAYTREE,MSGL_V,"Parsing playlist file %s...\n",file);
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stream = new_stream(fd,STREAMTYPE_PLAYLIST);
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ret = parse_playtree(stream);
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if(close(fd) < 0)
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mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Warning error while closing playlist file %s : %s\n",file,strerror(errno));
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free_stream(stream);
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return ret;
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}
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play_tree_parser_t*
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play_tree_parser_new(stream_t* stream,int deep) {
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play_tree_parser_t* p;
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p = (play_tree_parser_t*)calloc(1,sizeof(play_tree_parser_t));
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if(!p)
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return NULL;
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p->stream = stream;
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p->deep = deep;
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p->keep = 1;
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return p;
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}
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void
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play_tree_parser_free(play_tree_parser_t* p) {
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#ifdef MP_DEBUG
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assert(p != NULL);
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#endif
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if(p->buffer) free(p->buffer);
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if(p->line) free(p->line);
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free(p);
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}
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play_tree_t*
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play_tree_parser_get_play_tree(play_tree_parser_t* p) {
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play_tree_t* tree = NULL;
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#ifdef MP_DEBUG
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assert(p != NULL);
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#endif
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while(play_tree_parser_get_line(p) != NULL) {
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play_tree_parser_reset(p);
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tree = parse_asx(p);
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if(tree) break;
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play_tree_parser_reset(p);
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tree = parse_pls(p);
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if(tree) break;
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play_tree_parser_reset(p);
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// Here come the others formats ( textplain must stay the last one )
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tree = parse_textplain(p);
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if(tree) break;
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break;
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}
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if(tree)
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mp_msg(MSGT_PLAYTREE,MSGL_V,"Playlist succefully parsed\n");
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else mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Error while parsing playlist\n");
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if(tree)
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tree = play_tree_cleanup(tree);
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if(!tree) mp_msg(MSGT_PLAYTREE,MSGL_WARN,"Warning empty playlist\n");
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return tree;
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}
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