Introduce per group slice sizes.

[paraslash.git] / aft.c

diff --git a/aft.c b/aft.c
index 39e94a945e0b9b8c47d29e6bb59d799491f2f9e4..aa6ef08f21d1ab92afd557fc0b422cc90c7c61e4 100644 (file)
--- a/aft.c
+++ b/aft.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007-2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2007-2010 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -21,7 +21,6 @@
 #include "afh.h"
 #include "afs.h"
 #include "net.h"
-#include "vss.h"
 #include "fd.h"
 #include "ipc.h"
 #include "portable_io.h"
@@ -435,12 +434,26 @@ 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)
@@ -641,10 +654,10 @@ 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:
@@ -652,6 +665,18 @@ err:
        return ret;
 }
 
+/**
+ * Extract a afd stored in a shared memory area.
+ *
+ * Attach the shared memory area given by \a shmid, load the audio file data
+ * stored therein and detach the area afterwards.  Called by vss, after
+ * receiving a positive response to the request for the next audio file.
+ +
+ * \param shmid The identifier of the shared memory area containing the afd.
+ * \param afd Result pointer.
+ *
+ * \return Standard.
+ */
 int load_afd(int shmid, struct audio_file_data *afd)
 {
        void *shm_afd;
@@ -1070,6 +1095,7 @@ int open_and_update_audio_file(struct osl_row *aft_row, long score,
        ret = get_audio_file_path_of_row(aft_row, &path);
        if (ret < 0)
                return ret;
+       PARA_NOTICE_LOG("%s\n", path);
        ret = get_afsi_object_of_row(aft_row, &afsi_obj);
        if (ret < 0)
                return ret;
@@ -2446,6 +2472,18 @@ static void afs_stat_callback(int fd, const struct osl_object *query)
        pass_buffer_as_shm(buf, strlen(buf), &fd);
 }
 
+/**
+ * Get the current afs status items from the afs process and send it using RC4.
+ *
+ * \param rc4c The rc4 context for data encryption.
+ * \param parser_friendly Whether parser-friendly output format should be used.
+ *
+ * As the contents of the afs status items change in time and the command
+ * handler only has a COW version created at fork time, it can not send
+ * up-to-date afs status items directly. Therefore the usual callback mechanism
+ * is used to pass the status items from the afs process to the command handler
+ * via a shared memory area and a pipe.
+ */
 int send_afs_status(struct rc4_context *rc4c, int parser_friendly)
 {
        struct osl_object query = {.data = &parser_friendly,
@@ -2610,6 +2648,11 @@ static int aft_event_handler(enum afs_events event, struct para_buffer *pb,
        }
 }
 
+/**
+ * Initialize the audio file table.
+ *
+ * \param t Pointer to the structure to be initialized.
+ */
 void aft_init(struct afs_table *t)
 {
        t->open = aft_open;