From: Andre Noll <maan@systemlinux.org>
Date: Sun, 6 Jul 2008 17:25:40 +0000 (+0200)
Subject: Use an unused byte in struct afs_info to store the amplification value.
X-Git-Tag: v0.3.3~52^2~12
X-Git-Url: http://git.tue.mpg.de/?a=commitdiff_plain;h=f1b7734b997352b8df737b8184af69ca91c1b7dd;p=paraslash.git

Use an unused byte in struct afs_info to store the amplification value.
---

diff --git a/afs.h b/afs.h
index d01f0cfb..a596317f 100644
--- a/afs.h
+++ b/afs.h
@@ -24,6 +24,8 @@ struct afs_info {
 	uint32_t lyrics_id;
 	/** Mp3, ogg or aac. */
 	uint8_t audio_format_id;
+	/** Amplification value. */
+	uint8_t amp;
 };
 
 /**
diff --git a/aft.c b/aft.c
index 3d10ced2..8797bd86 100644
--- a/aft.c
+++ b/aft.c
@@ -142,8 +142,10 @@ enum afsi_offsets {
 	AFSI_LYRICS_ID_OFFSET = 24,
 	/** Storage position of the .audio_format_id field. */
 	AFSI_AUDIO_FORMAT_ID_OFFSET = 28,
-	/** 3 bytes reserved space for future usage. */
-	AFSI_AUDIO_FORMAT_UNUSED_OFFSET = 29,
+	/** Storage position of the amplification field. */
+	AFSI_AMP_OFFSET = 29,
+	/** 2 bytes reserved space for future usage. */
+	AFSI_AUDIO_FORMAT_UNUSED_OFFSET = 30,
 	/** On-disk storage space needed. */
 	AFSI_SIZE = 32
 };
@@ -167,7 +169,8 @@ void save_afsi(struct afs_info *afsi, struct osl_object *obj)
 	write_u32(buf + AFSI_LYRICS_ID_OFFSET, afsi->lyrics_id);
 	write_u8(buf + AFSI_AUDIO_FORMAT_ID_OFFSET,
 		afsi->audio_format_id);
-	memset(buf + AFSI_AUDIO_FORMAT_UNUSED_OFFSET, 0, 3);
+	write_u8(buf + AFSI_AMP_OFFSET, afsi->amp);
+	memset(buf + AFSI_AUDIO_FORMAT_UNUSED_OFFSET, 0, 2);
 }
 
 /**
@@ -192,6 +195,7 @@ int load_afsi(struct afs_info *afsi, struct osl_object *obj)
 	afsi->lyrics_id = read_u32(buf + AFSI_LYRICS_ID_OFFSET);
 	afsi->audio_format_id = read_u8(buf +
 		AFSI_AUDIO_FORMAT_ID_OFFSET);
+	afsi->amp = read_u8(buf + AFSI_AMP_OFFSET);
 	return 1;
 }