aft: Avoid invalid read.

[paraslash.git] / spx_afh.c

diff --git a/spx_afh.c b/spx_afh.c
index e83536795d4c9b57b97b285e4dfa15f7d3869c4b..caeacb1921341b04b26f117d5de6607a80ab95e9 100644 (file)
--- a/spx_afh.c
+++ b/spx_afh.c
@@ -1,8 +1,4 @@
-/*
- * Copyright (C) 2010 Andre Noll <maan@tuebingen.mpg.de>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2010 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
 
 /* This file is based on speexdec.c, by Jean-Marc Valin, see below. */
 
@@ -88,7 +84,7 @@ static int spx_get_comments(unsigned char *comments, int length,
        if (c + 4 > end)
                return -E_SPX_COMMENT;
        nb_fields = read_u32(c);
-       PARA_DEBUG_LOG("%d comment(s)\n", nb_fields);
+       PARA_DEBUG_LOG("%u comment(s)\n", nb_fields);
        c += 4;
        for (i = 0; i < nb_fields; i++, c += len) {
                char *tag;
@@ -118,8 +114,6 @@ static int spx_get_comments(unsigned char *comments, int length,
        return 1;
 }
 
-static const char* speex_suffixes[] = {"spx", "speex", NULL};
-
 static int spx_packet_callback(ogg_packet *packet, int packet_num,
                __a_unused int serial, struct afh_info *afhi,
                void *private_data)
@@ -154,22 +148,114 @@ static int spx_get_file_info(char *map, size_t numbytes, __a_unused int fd,
                struct afh_info *afhi)
 {
        struct private_spx_data psd;
-       struct ogg_afh_callback_info spx_callback_info = {
+       struct oac_callback_info spx_callback_info = {
                .packet_callback = spx_packet_callback,
                .private_data = &psd,
        };
 
        memset(&psd, 0, sizeof(psd));
-       return ogg_get_file_info(map, numbytes, afhi, &spx_callback_info);
+       return oac_get_file_info(map, numbytes, afhi, &spx_callback_info);
+}
+
+static size_t spx_make_meta_packet(struct taginfo *tags, char **result)
+{
+       size_t sz;
+       char *buf, *p;
+       size_t comment_len = strlen(tags->comment),
+               artist_len = strlen(tags->artist),
+               title_len = strlen(tags->title),
+               album_len = strlen(tags->album),
+               year_len = strlen(tags->year);
+       uint32_t comment_sz = comment_len,
+               artist_sz = artist_len + strlen("artist="),
+               title_sz = title_len + strlen("title="),
+               album_sz = album_len + strlen("album="),
+               year_sz = year_len + strlen("year=");
+       uint32_t num_tags;
+
+       sz = 4 /* comment length (always present) */
+               + comment_sz
+               + 4; /* number of tags */
+       num_tags = 0;
+       if (artist_len) {
+               num_tags++;
+               sz += 4 + artist_sz;
+       }
+       if (title_len) {
+               num_tags++;
+               sz += 4 + title_sz;
+       }
+       if (album_len) {
+               num_tags++;
+               sz += 4 + album_sz;
+       }
+       if (year_len) {
+               num_tags++;
+               sz += 4 + year_sz;
+       }
+       PARA_DEBUG_LOG("meta packet size: %zu bytes\n", sz);
+       /* terminating zero byte for the last sprintf() */
+       buf = p = para_malloc(sz + 1);
+       write_u32(p, comment_sz);
+       p += 4;
+       strcpy(p, tags->comment);
+       p += comment_sz;
+       write_u32(p, num_tags);
+       p += 4;
+       if (artist_len) {
+               write_u32(p, artist_sz);
+               p += 4;
+               sprintf(p, "artist=%s", tags->artist);
+               p += artist_sz;
+       }
+       if (title_len) {
+               write_u32(p, title_sz);
+               p += 4;
+               sprintf(p, "title=%s", tags->title);
+               p += title_sz;
+       }
+       if (album_len) {
+               write_u32(p, album_sz);
+               p += 4;
+               sprintf(p, "album=%s", tags->album);
+               p += album_sz;
+       }
+       if (year_len) {
+               write_u32(p, year_sz);
+               p += 4;
+               sprintf(p, "year=%s", tags->year);
+               p += year_sz;
+       }
+       assert(p == buf + sz);
+       *result = buf;
+       return sz;
+}
+
+static int spx_rewrite_tags(const char *map, size_t mapsize,
+               struct taginfo *tags, int output_fd,
+               __a_unused const char *filename)
+{
+       char *meta_packet;
+       size_t meta_sz;
+       int ret;
+
+       meta_sz = spx_make_meta_packet(tags, &meta_packet);
+       ret = oac_rewrite_tags(map, mapsize, output_fd, meta_packet, meta_sz);
+       free(meta_packet);
+       return ret;
 }
 
+static const char * const speex_suffixes[] = {"spx", "speex", NULL};
+
 /**
- * The init function of the ogg/speex audio format handler.
+ * The ogg/speex audio format handler.
  *
- * \param afh Pointer to the struct to initialize.
+ * This codec is considered obsolete because the opus codec surpasses its
+ * performance in all areas. It is only compiled in if both the ogg and the
+ * speex library are installed.
  */
-void spx_afh_init(struct audio_format_handler *afh)
-{
-       afh->get_file_info = spx_get_file_info,
-       afh->suffixes = speex_suffixes;
-}
+const struct audio_format_handler spx_afh = {
+       .get_file_info = spx_get_file_info,
+       .suffixes = speex_suffixes,
+       .rewrite_tags = spx_rewrite_tags,
+};