Replace direct use of RC4 by stream cipher abstraction.

[paraslash.git] / aft.c

diff --git a/aft.c b/aft.c
index eb0f7b57911ed49fdb19a6bee1638d84ef1288a2..3b2f9172e56785292323e76c85a9f44e574186f5 100644 (file)
--- a/aft.c
+++ b/aft.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007-2010 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2007-2011 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -8,7 +8,6 @@
 
 #include <regex.h>
 #include <dirent.h> /* readdir() */
-#include <openssl/rc4.h>
 #include <sys/mman.h>
 #include <fnmatch.h>
 #include <sys/shm.h>
@@ -344,16 +343,16 @@ enum afhi_offsets {
        AFHI_BITRATE_OFFSET = 4,
        /** Position of the frequency. */
        AFHI_FREQUENCY_OFFSET = 8,
-       /** Location of the audio file header. */
-       AFHI_HEADER_OFFSET_OFFSET = 12,
+       /** Was: Location of the audio file header. */
+       AFHI_UNUSED1_OFFSET = 12,
        /* Length of the audio file header. Zero means: No header. */
        AFHI_HEADER_LEN_OFFSET = 16,
        /** The total number of chunks (4 bytes). */
        CHUNKS_TOTAL_OFFSET = 20,
        /** The length of the audio file header (4 bytes). */
        HEADER_LEN_OFFSET = 24,
-       /** The start of the audio file header (4 bytes). */
-       HEADER_OFFSET_OFFSET = 28,
+       /** Was: The start of the audio file header (4 bytes). */
+       AFHI_UNUSED2_OFFSET = 28,
        /** The seconds part of the chunk time (4 bytes). */
        CHUNK_TV_TV_SEC_OFFSET = 32,
        /** The microseconds part of the chunk time (4 bytes). */
@@ -388,12 +387,12 @@ static void save_afhi(struct afh_info *afhi, char *buf)
        write_u32(buf + AFHI_SECONDS_TOTAL_OFFSET, afhi->seconds_total);
        write_u32(buf + AFHI_BITRATE_OFFSET, afhi->bitrate);
        write_u32(buf + AFHI_FREQUENCY_OFFSET, afhi->frequency);
-       write_u32(buf + AFHI_HEADER_OFFSET_OFFSET, afhi->header_offset);
+       write_u32(buf + AFHI_UNUSED1_OFFSET, 0);
        write_u32(buf + AFHI_HEADER_LEN_OFFSET, afhi->header_len);
        write_u8(buf + AFHI_CHANNELS_OFFSET, afhi->channels);
        write_u32(buf + CHUNKS_TOTAL_OFFSET, afhi->chunks_total);
        write_u32(buf + HEADER_LEN_OFFSET, afhi->header_len);
-       write_u32(buf + HEADER_OFFSET_OFFSET, afhi->header_offset);
+       write_u32(buf + AFHI_UNUSED2_OFFSET, 0);
        write_u32(buf + CHUNK_TV_TV_SEC_OFFSET, afhi->chunk_tv.tv_sec);
        write_u32(buf + CHUNK_TV_TV_USEC_OFFSET, afhi->chunk_tv.tv_usec);
        p = buf + AFHI_INFO_STRING_OFFSET;
@@ -411,12 +410,10 @@ static void load_afhi(const char *buf, struct afh_info *afhi)
        afhi->seconds_total = read_u32(buf + AFHI_SECONDS_TOTAL_OFFSET);
        afhi->bitrate = read_u32(buf + AFHI_BITRATE_OFFSET);
        afhi->frequency = read_u32(buf + AFHI_FREQUENCY_OFFSET);
-       afhi->header_offset = read_u32(buf + AFHI_HEADER_OFFSET_OFFSET);
        afhi->header_len = read_u32(buf + AFHI_HEADER_LEN_OFFSET);
        afhi->channels = read_u8(buf + AFHI_CHANNELS_OFFSET);
        afhi->chunks_total = read_u32(buf + CHUNKS_TOTAL_OFFSET);
        afhi->header_len = read_u32(buf + HEADER_LEN_OFFSET);
-       afhi->header_offset = read_u32(buf + HEADER_OFFSET_OFFSET);
        afhi->chunk_tv.tv_sec = read_u32(buf + CHUNK_TV_TV_SEC_OFFSET);
        afhi->chunk_tv.tv_usec = read_u32(buf + CHUNK_TV_TV_USEC_OFFSET);
        afhi->techinfo = (char *)buf + AFHI_INFO_STRING_OFFSET;
@@ -434,12 +431,26 @@ static unsigned sizeof_chunk_table(struct afh_info *afhi)
        return 4 * (afhi->chunks_total + 1);
 }
 
-static void save_chunk_table(struct afh_info *afhi, char *buf)
+static uint32_t save_chunk_table(struct afh_info *afhi, char *buf)
 {
        int i;
-
-       for (i = 0; i <= afhi->chunks_total; i++)
-               write_u32(buf + 4 * i, afhi->chunk_table[i]);
+       uint32_t max = 0, old = 0;
+
+       for (i = 0; i <= afhi->chunks_total; i++) {
+               uint32_t val = afhi->chunk_table[i];
+               write_u32(buf + 4 * i, val);
+               /*
+                * If the first chunk is the header, do not consider it for the
+                * calculation of the largest chunk size.
+                */
+               if (i == 0 || (i == 1 && afhi->header_len > 0)) {
+                       old = val;
+                       continue;
+               }
+               max = PARA_MAX(max, val - old);
+               old = val;
+       }
+       return max;
 }
 
 static void load_chunk_table(struct afh_info *afhi, char *buf)
@@ -640,10 +651,10 @@ static int save_afd(struct audio_file_data *afd)
        ret = shm_attach(shmid, ATTACH_RW, &shm_afd);
        if (ret < 0)
                goto err;
-       *(struct audio_file_data *)shm_afd = *afd;
        buf = shm_afd;
        buf += sizeof(*afd);
-       save_chunk_table(&afd->afhi, buf);
+       afd->max_chunk_size = save_chunk_table(&afd->afhi, buf);
+       *(struct audio_file_data *)shm_afd = *afd;
        shm_detach(shm_afd);
        return shmid;
 err:
@@ -1112,6 +1123,7 @@ int open_and_update_audio_file(struct osl_row *aft_row, long score,
        new_afsi.last_played = time(NULL);
        save_afsi(&new_afsi, &afsi_obj); /* in-place update */
 
+       afd->audio_format_id = old_afsi.audio_format_id;
        load_chunk_table(&afd->afhi, chunk_table_obj.data);
        ret = make_status_items(afd, &old_afsi, path, score, file_hash);
        if (ret < 0)
@@ -1123,6 +1135,8 @@ int open_and_update_audio_file(struct osl_row *aft_row, long score,
 err:
        free(afd->afhi.chunk_table);
        osl_close_disk_object(&chunk_table_obj);
+       if (ret < 0)
+               PARA_ERROR_LOG("%s: %s\n", path, para_strerror(-ret));
        return ret;
 }