X-Git-Url: http://git.tuebingen.mpg.de/?a=blobdiff_plain;f=aft.c;h=4e2e1f8dbe2af69df7f5927a11687a236975c5a3;hb=b6b571e6c;hp=8b9d85b5d1010ea57b779082969a21700bd12b93;hpb=e0f54e42887a8beef092755f5ed9cdf6d499bef2;p=paraslash.git

diff --git a/aft.c b/aft.c
index 8b9d85b5..4e2e1f8d 100644
--- a/aft.c
+++ b/aft.c
@@ -335,8 +335,8 @@ enum afhi_offsets {
 	CHUNKS_TOTAL_OFFSET = 20,
 	/** The length of the audio file header (4 bytes). */
 	HEADER_LEN_OFFSET = 24,
-	/** Was: The start of the audio file header (4 bytes). */
-	AFHI_UNUSED2_OFFSET = 28,
+	/** Size of the largest chunk in bytes. (4 bytes). */
+	AFHI_MAX_CHUNK_SIZE_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). */
@@ -376,7 +376,7 @@ static void save_afhi(struct afh_info *afhi, char *buf)
 	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 + AFHI_UNUSED2_OFFSET, 0);
+	write_u32(buf + AFHI_MAX_CHUNK_SIZE_OFFSET, afhi->max_chunk_size);
 	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;
@@ -398,6 +398,7 @@ static void load_afhi(const char *buf, struct afh_info *afhi)
 	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->max_chunk_size = read_u32(buf + AFHI_MAX_CHUNK_SIZE_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;
@@ -415,35 +416,21 @@ static unsigned sizeof_chunk_table(struct afh_info *afhi)
 	return 4 * (afhi->chunks_total + 1);
 }
 
-static uint32_t save_chunk_table(struct afh_info *afhi, char *buf)
+static void save_chunk_table(struct afh_info *afhi, char *buf)
 {
-	int i;
-	uint32_t max = 0, old = 0;
+	uint32_t n;
 
-	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;
+	for (n = 0; n <= afhi->chunks_total; n++)
+		write_u32(buf + 4 * n, afhi->chunk_table[n]);
 }
 
-static void load_chunk_table(struct afh_info *afhi, char *buf)
+static void load_chunk_table(struct afh_info *afhi, const struct osl_object *ct)
 {
 	int i;
 
 	afhi->chunk_table = para_malloc(sizeof_chunk_table(afhi));
-	for (i = 0; i <= afhi->chunks_total; i++)
-		afhi->chunk_table[i] = read_u32(buf + 4 * i);
+	for (i = 0; i <= afhi->chunks_total && i * 4 + 3 < ct->size; i++)
+		afhi->chunk_table[i] = read_u32(ct->data + 4 * i);
 }
 
 /**
@@ -638,7 +625,13 @@ static int save_afd(struct audio_file_data *afd)
 		goto err;
 	buf = shm_afd;
 	buf += sizeof(*afd);
-	afd->max_chunk_size = save_chunk_table(&afd->afhi, buf);
+	save_chunk_table(&afd->afhi, buf);
+	if (afd->afhi.max_chunk_size == 0) { /* v0.5.x on-disk afhi */
+		set_max_chunk_size(&afd->afhi);
+		PARA_NOTICE_LOG("max chunk size unset, re-add required\n");
+	} else
+		PARA_INFO_LOG("using max chunk size from afhi\n");
+	afd->max_chunk_size = afd->afhi.max_chunk_size;
 	*(struct audio_file_data *)shm_afd = *afd;
 	shm_detach(shm_afd);
 	return shmid;
@@ -663,14 +656,22 @@ int load_afd(int shmid, struct audio_file_data *afd)
 {
 	void *shm_afd;
 	int ret;
+	struct osl_object obj;
 
 	ret = shm_attach(shmid, ATTACH_RO, &shm_afd);
 	if (ret < 0)
 		return ret;
+	ret = shm_size(shmid, &obj.size);
+	if (ret < 0)
+		goto detach;
 	*afd = *(struct audio_file_data *)shm_afd;
-	load_chunk_table(&afd->afhi, shm_afd + sizeof(*afd));
+	obj.data = shm_afd + sizeof(*afd);
+	obj.size -= sizeof(*afd);
+	load_chunk_table(&afd->afhi, &obj);
+	ret = 1;
+detach:
 	shm_detach(shm_afd);
-	return 1;
+	return ret;
 }
 
 static int get_local_time(uint64_t *seconds, char *buf, size_t size,
@@ -939,6 +940,8 @@ static int print_list_item(struct ls_data *d, struct ls_options *opts,
 	WRITE_STATUS_ITEM(b, SI_CHUNK_TIME, "%lu\n", tv2ms(&afhi->chunk_tv));
 	WRITE_STATUS_ITEM(b, SI_NUM_CHUNKS, "%" PRIu32 "\n",
 		afhi->chunks_total);
+	WRITE_STATUS_ITEM(b, SI_MAX_CHUNK_SIZE, "%" PRIu32 "\n",
+		afhi->max_chunk_size);
 	WRITE_STATUS_ITEM(b, SI_TECHINFO, "%s\n", afhi->techinfo);
 	WRITE_STATUS_ITEM(b, SI_ARTIST, "%s\n", afhi->tags.artist);
 	WRITE_STATUS_ITEM(b, SI_TITLE, "%s\n", afhi->tags.title);
@@ -1076,7 +1079,7 @@ again:
 	save_afsi(&new_afsi, &afsi_obj); /* in-place update */
 
 	afd->audio_format_id = d->afsi.audio_format_id;
-	load_chunk_table(&afd->afhi, chunk_table_obj.data);
+	load_chunk_table(&afd->afhi, &chunk_table_obj);
 	aced.aft_row = current_aft_row;
 	aced.old_afsi = &d->afsi;
 	/*