Split mpvcore/ into common/, misc/, bstr/

1 files changed, 566 insertions, 0 deletions

diff --git a/common/playlist_parser.c b/common/playlist_parser.c
new file mode 100644
index 0000000000..af249f4aa5
--- /dev/null
+++ b/common/playlist_parser.c
@@ -0,0 +1,566 @@
+/*
+ * This file is part of MPlayer.
+ *
+ * MPlayer is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MPlayer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*
+ * Warning: this is outdated, crappy code. It is used only for --playlist.
+ * New or cleaned up code should be added to demux_playlist.c instead.
+ */
+
+#include "config.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <limits.h>
+
+#include "talloc.h"
+#include "asxparser.h"
+#include "playlist.h"
+#include "playlist_parser.h"
+#include "stream/stream.h"
+#include "demux/demux.h"
+#include "common/msg.h"
+#include "options/path.h"
+
+
+#define BUF_STEP 1024
+
+#define WHITES " \n\r\t"
+
+typedef struct play_tree_parser {
+  struct stream *stream;
+  char *buffer,*iter,*line;
+  int buffer_size , buffer_end;
+  int keep;
+  struct playlist *pl;
+} play_tree_parser_t;
+
+static void
+strstrip(char* str) {
+  char* i;
+
+  if (str==NULL)
+    return;
+  for(i = str ; i[0] != '\0' && strchr(WHITES,i[0]) != NULL; i++)
+    /* NOTHING */;
+  if(i[0] != '\0') {
+    memmove(str,i,strlen(i) + 1);
+    for(i = str + strlen(str) - 1 ; strchr(WHITES,i[0]) != NULL; i--)
+      /* NOTHING */;
+    i[1] = '\0';
+  } else
+    str[0] = '\0';
+}
+
+static char*
+play_tree_parser_get_line(play_tree_parser_t* p) {
+  char *end,*line_end;
+  int r,resize = 0;
+
+  if(p->buffer == NULL) {
+    p->buffer = malloc(BUF_STEP);
+    p->buffer_size = BUF_STEP;
+    p->buffer[0] = 0;
+    p->iter = p->buffer;
+  }
+
+  if(p->stream->eof && (p->buffer_end == 0 || p->iter[0] == '\0'))
+    return NULL;
+
+  assert(p->buffer_end < p->buffer_size);
+  assert(!p->buffer[p->buffer_end]);
+  while(1) {
+
+    if(resize) {
+      char *tmp;
+      r = p->iter - p->buffer;
+      end = p->buffer + p->buffer_end;
+      if (p->buffer_size > INT_MAX - BUF_STEP)
+        break;
+      tmp = realloc(p->buffer, p->buffer_size + BUF_STEP);
+      if (!tmp)
+        break;
+      p->buffer = tmp;
+      p->iter = p->buffer + r;
+      p->buffer_size += BUF_STEP;
+      resize = 0;
+    }
+
+    if(p->buffer_size - p->buffer_end > 1 && ! p->stream->eof) {
+      r = stream_read(p->stream,p->buffer + p->buffer_end,p->buffer_size - p->buffer_end - 1);
+      if(r > 0) {
+	p->buffer_end += r;
+	assert(p->buffer_end < p->buffer_size);
+	p->buffer[p->buffer_end] = '\0';
+	while(strlen(p->buffer + p->buffer_end - r) != r)
+	  p->buffer[p->buffer_end - r + strlen(p->buffer + p->buffer_end - r)] = '\n';
+      }
+      assert(!p->buffer[p->buffer_end]);
+    }
+
+    end = strchr(p->iter,'\n');
+    if(!end) {
+      if(p->stream->eof) {
+	end = p->buffer + p->buffer_end;
+	break;
+      }
+      resize = 1;
+      continue;
+    }
+    break;
+  }
+
+  line_end = (end > p->iter && *(end-1) == '\r') ? end-1 : end;
+  if(line_end - p->iter >= 0)
+    p->line = realloc(p->line, line_end - p->iter + 1);
+  else
+    return NULL;
+  if(line_end - p->iter > 0)
+    strncpy(p->line,p->iter,line_end - p->iter);
+  p->line[line_end - p->iter] = '\0';
+  if(end[0] != '\0')
+    end++;
+
+  if(!p->keep) {
+    if(end[0] != '\0') {
+      p->buffer_end -= end-p->iter;
+      memmove(p->buffer,end,p->buffer_end);
+    } else
+      p->buffer_end = 0;
+    p->buffer[p->buffer_end] = '\0';
+    p->iter = p->buffer;
+  } else
+    p->iter = end;
+
+  return p->line;
+}
+
+static void
+play_tree_parser_reset(play_tree_parser_t* p) {
+  p->iter = p->buffer;
+}
+
+static void
+play_tree_parser_stop_keeping(play_tree_parser_t* p) {
+  p->keep = 0;
+  if(p->iter && p->iter != p->buffer) {
+    p->buffer_end -= p->iter -p->buffer;
+    if(p->buffer_end)
+      memmove(p->buffer,p->iter,p->buffer_end);
+    p->buffer[p->buffer_end] = 0;
+    p->iter = p->buffer;
+  }
+}
+
+
+static bool parse_asx(play_tree_parser_t* p) {
+  int comments = 0,get_line = 1;
+  char* line = NULL;
+
+  mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying asx...\n");
+
+  while(1) {
+    if(get_line) {
+      line = play_tree_parser_get_line(p);
+      if(!line)
+	return false;
+      strstrip(line);
+      if(line[0] == '\0')
+	continue;
+    }
+    if(!comments) {
+      if(line[0] != '<') {
+	mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"First char isn't '<' but '%c'\n",line[0]);
+	mp_msg(MSGT_PLAYTREE,MSGL_DBG3,"Buffer = [%s]\n",p->buffer);
+	return false;
+      } else if(strncmp(line,"<!--",4) == 0) { // Comments
+	comments = 1;
+	line += 4;
+	if(line[0] != '\0' && strlen(line) > 0)
+	  get_line = 0;
+      } else if(strncasecmp(line,"<ASX",4) == 0) // We got an asx element
+	break;
+      else // We don't get an asx
+	return false;
+    } else { // Comments
+      char* c;
+      c = strchr(line,'-');
+      if(c) {
+	if (strncmp(c,"--!>",4) == 0) { // End of comments
+	  comments = 0;
+	  line = c+4;
+	  if(line[0] != '\0') // There is some more data on this line : keep it
+	    get_line = 0;
+
+	} else {
+	  line = c+1; // Jump the -
+	  if(line[0] != '\0') // Some more data
+	    get_line = 0;
+	  else  // End of line
+	    get_line = 1;
+	}
+      } else // No - on this line (or rest of line) : get next one
+	get_line = 1;
+    }
+  }
+
+  mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected asx format\n");
+
+  // We have an asx : load it in memory and parse
+
+  while((line = play_tree_parser_get_line(p)) != NULL)
+    /* NOTHING */;
+
+ mp_msg(MSGT_PLAYTREE,MSGL_DBG3,"Parsing asx file: [%s]\n",p->buffer);
+ return asx_parse(p->buffer,p->pl);
+}
+
+static bool parse_smil(play_tree_parser_t* p) {
+  int entrymode=0;
+  char* line,source[512],*pos,*s_start,*s_end,*src_line;
+  int is_rmsmil = 0;
+  unsigned int npkt, ttlpkt;
+
+  mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying smil playlist...\n");
+
+  // Check if smil
+  while((line = play_tree_parser_get_line(p)) != NULL) {
+    strstrip(line);
+    if(line[0] == '\0') // Ignore empties
+      continue;
+    if (strncasecmp(line,"<?xml",5)==0) // smil in xml
+      continue;
+    if (strncasecmp(line,"<!DOCTYPE smil",13)==0) // smil in xml
+      continue;
+    if (strncasecmp(line,"<smil",5)==0 || strncasecmp(line,"<?wpl",5)==0 ||
+      strncasecmp(line,"(smil-document",14)==0)
+      break; // smil header found
+    else
+      return NULL; //line not smil exit
+  }
+
+  if (!line) return NULL;
+  mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected smil playlist format\n");
+  play_tree_parser_stop_keeping(p);
+
+  if (strncasecmp(line,"(smil-document",14)==0) {
+    mp_msg(MSGT_PLAYTREE,MSGL_V,"Special smil-over-realrtsp playlist header\n");
+    is_rmsmil = 1;
+    if (sscanf(line, "(smil-document (ver 1.0)(npkt %u)(ttlpkt %u", &npkt, &ttlpkt) != 2) {
+      mp_msg(MSGT_PLAYTREE,MSGL_WARN,"smil-over-realrtsp: header parsing failure, assuming single packet.\n");
+      npkt = ttlpkt = 1;
+    }
+    if (ttlpkt == 0 || npkt > ttlpkt) {
+      mp_msg(MSGT_PLAYTREE,MSGL_WARN,"smil-over-realrtsp: bad packet counters (npkk = %u, ttlpkt = %u), assuming single packet.\n",
+        npkt, ttlpkt);
+      npkt = ttlpkt = 1;
+    }
+  }
+
+  //Get entries from smil
+  src_line = line;
+  line = NULL;
+  do {
+    strstrip(src_line);
+    free(line);
+    line = NULL;
+    /* If we're parsing smil over realrtsp and this is not the last packet and
+     * this is the last line in the packet (terminating with ") ) we must get
+     * the next line, strip the header, and concatenate it to the current line.
+     */
+    if (is_rmsmil && npkt != ttlpkt && strstr(src_line,"\")")) {
+      char *payload;
+
+      line = strdup(src_line);
+      if(!(src_line = play_tree_parser_get_line(p))) {
+        mp_msg(MSGT_PLAYTREE,MSGL_WARN,"smil-over-realrtsp: can't get line from packet %u/%u.\n", npkt, ttlpkt);
+        break;
+      }
+      strstrip(src_line);
+      // Skip header, packet starts after "
+      if(!(payload = strchr(src_line,'\"'))) {
+        mp_msg(MSGT_PLAYTREE,MSGL_WARN,"smil-over-realrtsp: can't find start of packet, using complete line.\n");
+        payload = src_line;
+      } else
+        payload++;
+      // Skip ") at the end of the last line from the current packet
+      line[strlen(line)-2] = 0;
+      line = realloc(line, strlen(line)+strlen(payload)+1);
+      strcat (line, payload);
+      npkt++;
+    } else
+      line = strdup(src_line);
+    /* Unescape \" to " for smil-over-rtsp */
+    if (is_rmsmil && line[0] != '\0') {
+      int i, j;
+
+      for (i = 0; i < strlen(line); i++)
+        if (line[i] == '\\' && line[i+1] == '"')
+          for (j = i; line[j]; j++)
+            line[j] = line[j+1];
+    }
+    pos = line;
+   while (pos) {
+    if (!entrymode) { // all entries filled so far
+     while ((pos=strchr(pos, '<'))) {
+      if (strncasecmp(pos,"<video",6)==0  || strncasecmp(pos,"<audio",6)==0 || strncasecmp(pos,"<media",6)==0) {
+          entrymode=1;
+          break; // Got a valid tag, exit '<' search loop
+      }
+      pos++;
+     }
+    }
+    if (entrymode) { //Entry found but not yet filled
+      pos = strstr(pos,"src=");   // Is source present on this line
+      if (pos != NULL) {
+        entrymode=0;
+        if (pos[4] != '"' && pos[4] != '\'') {
+          mp_msg(MSGT_PLAYTREE,MSGL_V,"Unknown delimiter %c in source line %s\n", pos[4], line);
+          break;
+        }
+        s_start=pos+5;
+        s_end=strchr(s_start,pos[4]);
+        if (s_end == NULL) {
+          mp_msg(MSGT_PLAYTREE,MSGL_V,"Error parsing this source line %s\n",line);
+          break;
+        }
+        if (s_end-s_start> 511) {
+          mp_msg(MSGT_PLAYTREE,MSGL_V,"Cannot store such a large source %s\n",line);
+          break;
+        }
+        strncpy(source,s_start,s_end-s_start);
+        source[(s_end-s_start)]='\0'; // Null terminate
+        playlist_add_file(p->pl, source);
+        pos = s_end;
+      }
+    }
+   }
+  } while((src_line = play_tree_parser_get_line(p)) != NULL);
+
+  free(line);
+  return true;
+}
+
+static bool parse_textplain(play_tree_parser_t* p) {
+  char* line;
+
+  mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying plaintext playlist...\n");
+  play_tree_parser_stop_keeping(p);
+
+  while((line = play_tree_parser_get_line(p)) != NULL) {
+    strstrip(line);
+    if(line[0] == '\0' || line[0] == '#' || (line[0] == '/' && line[1] == '/'))
+      continue;
+
+      playlist_add_file(p->pl,line);
+  }
+
+  return true;
+}
+
+/**
+ * \brief decode the base64 used in nsc files
+ * \param in input string, 0-terminated
+ * \param buf output buffer, must point to memory suitable for realloc,
+ *            will be NULL on failure.
+ * \return decoded length in bytes
+ */
+static int decode_nsc_base64(char *in, char **buf) {
+  int i, j, n;
+  if (in[0] != '0' || in[1] != '2')
+    goto err_out;
+  in += 2; // skip prefix
+  if (strlen(in) < 16) // error out if nothing to decode
+    goto err_out;
+  in += 12; // skip encoded string length
+  n = strlen(in) / 4;
+  *buf = realloc(*buf, n * 3);
+  for (i = 0; i < n; i++) {
+    uint8_t c[4];
+    for (j = 0; j < 4; j++) {
+      c[j] = in[4 * i + j];
+      if (c[j] >= '0' && c[j] <= '9') c[j] += 0 - '0';
+      else if (c[j] >= 'A' && c[j] <= 'Z') c[j] += 10 - 'A';
+      else if (c[j] >= 'a' && c[j] <= 'z') c[j] += 36 - 'a';
+      else if (c[j] == '{') c[j] = 62;
+      else if (c[j] == '}') c[j] = 63;
+      else {
+        mp_msg(MSGT_PLAYTREE, MSGL_ERR, "Invalid character %c (0x%02"PRIx8")\n", c[j], c[j]);
+        goto err_out;
+      }
+    }
+    (*buf)[3 * i] = (c[0] << 2) | (c[1] >> 4);
+    (*buf)[3 * i + 1] = (c[1] << 4) | (c[2] >> 2);
+    (*buf)[3 * i + 2] = (c[2] << 6) | c[3];
+  }
+  return 3 * n;
+err_out:
+  free(*buf);
+  *buf = NULL;
+  return 0;
+}
+
+/**
+ * \brief "converts" utf16 to ascii by just discarding every second byte
+ * \param buf buffer to convert
+ * \param len lenght of buffer, must be > 0
+ */
+static void utf16_to_ascii(char *buf, int len) {
+  int i;
+  if (len <= 0) return;
+  for (i = 0; i < len / 2; i++)
+    buf[i] = buf[i * 2];
+  buf[i] = 0; // just in case
+}
+
+static bool parse_nsc(play_tree_parser_t* p) {
+  char *line, *addr = NULL, *url, *unicast_url = NULL;
+  int port = 0;
+
+  mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying nsc playlist...\n");
+  while((line = play_tree_parser_get_line(p)) != NULL) {
+    strstrip(line);
+    if(!line[0]) // Ignore empties
+      continue;
+    if (strncasecmp(line,"[Address]", 9) == 0)
+      break; // nsc header found
+    else
+      return false;
+  }
+  mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected nsc playlist format\n");
+  play_tree_parser_stop_keeping(p);
+  while ((line = play_tree_parser_get_line(p)) != NULL) {
+    strstrip(line);
+    if (!line[0])
+      continue;
+    if (strncasecmp(line, "Unicast URL=", 12) == 0) {
+      int len = decode_nsc_base64(&line[12], &unicast_url);
+      if (len <= 0)
+        mp_msg(MSGT_PLAYTREE, MSGL_WARN, "[nsc] Unsupported Unicast URL encoding\n");
+      else
+        utf16_to_ascii(unicast_url, len);
+    } else if (strncasecmp(line, "IP Address=", 11) == 0) {
+      int len = decode_nsc_base64(&line[11], &addr);
+      if (len <= 0)
+        mp_msg(MSGT_PLAYTREE, MSGL_WARN, "[nsc] Unsupported IP Address encoding\n");
+      else
+        utf16_to_ascii(addr, len);
+    } else if (strncasecmp(line, "IP Port=", 8) == 0) {
+      port = strtol(&line[8], NULL, 0);
+    }
+  }
+
+  bool success = false;
+
+  if (unicast_url)
+    url = strdup(unicast_url);
+  else if (addr && port) {
+    url = malloc(strlen(addr) + 7 + 20 + 1);
+    sprintf(url, "http://%s:%i", addr, port);
+  } else
+   goto err_out;
+
+  playlist_add_file(p->pl, url);
+  free(url);
+  success = true;
+err_out:
+  free(addr);
+  free(unicast_url);
+  return success;
+}
+
+static struct playlist *do_parse(struct stream* stream, bool forced);
+
+struct playlist *playlist_parse_file(const char *file, struct MPOpts *opts)
+{
+  stream_t *stream = stream_open(file, opts);
+  if(!stream) {
+      mp_msg(MSGT_PLAYTREE,MSGL_ERR,
+             "Error while opening playlist file %s: %s\n",
+             file, strerror(errno));
+    return false;
+  }
+
+  mp_msg(MSGT_PLAYTREE, MSGL_V,
+         "Parsing playlist file %s...\n", file);
+
+  struct playlist *ret = do_parse(stream, true);
+  free_stream(stream);
+
+  if (ret)
+    playlist_add_base_path(ret, mp_dirname(file));
+
+  return ret;
+
+}
+
+typedef bool (*parser_fn)(play_tree_parser_t *);
+static const parser_fn pl_parsers[] = {
+    parse_asx,
+    parse_smil,
+    parse_nsc,
+    parse_textplain
+};
+
+
+static struct playlist *do_parse(struct stream* stream, bool forced)
+{
+  play_tree_parser_t p = {
+      .stream = stream,
+      .pl = talloc_zero(NULL, struct playlist),
+      .keep = 1,
+  };
+
+  bool success = false;
+  struct demuxer *pl_demux = demux_open(stream, "playlist", NULL, stream->opts);
+  if (pl_demux && pl_demux->playlist) {
+    playlist_transfer_entries(p.pl, pl_demux->playlist);
+    success = true;
+  }
+  free_demuxer(pl_demux);
+  if (!success && play_tree_parser_get_line(&p) != NULL) {
+    for (int n = 0; n < sizeof(pl_parsers) / sizeof(pl_parsers[0]); n++) {
+      play_tree_parser_reset(&p);
+      if (pl_parsers[n] == parse_textplain && !forced)
+        break;
+      if (pl_parsers[n](&p)) {
+        success = true;
+        break;
+      }
+    }
+  }
+
+  if(success)
+    mp_msg(MSGT_PLAYTREE,MSGL_V,"Playlist successfully parsed\n");
+  else {
+    mp_msg(MSGT_PLAYTREE,((forced==1)?MSGL_ERR:MSGL_V),"Error while parsing playlist\n");
+    talloc_free(p.pl);
+    p.pl = NULL;
+  }
+
+  if (p.pl && !p.pl->first)
+    mp_msg(MSGT_PLAYTREE,((forced==1)?MSGL_WARN:MSGL_V),"Warning: empty playlist\n");
+
+  return p.pl;
+}