diff options
| author | Jens Arnold <amiconn@rockbox.org> | 2005-08-22 00:15:57 +0000 |
|---|---|---|
| committer | Jens Arnold <amiconn@rockbox.org> | 2005-08-22 00:15:57 +0000 |
| commit | 249f86cb347830865c98e5cd99b7c815daec9aee (patch) | |
| tree | e705fb9b0a31a18a03e5064288324354afcc3805 /firmware | |
| parent | d4496efee7bd30e4e976cf9937c75f5d00f3acb5 (diff) | |
| download | rockbox-249f86cb347830865c98e5cd99b7c815daec9aee.tar.gz rockbox-249f86cb347830865c98e5cd99b7c815daec9aee.zip | |
Some slight size optimisations.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7383 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/mp3data.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/firmware/mp3data.c b/firmware/mp3data.c index 260412b68a..bca8560188 100644 --- a/firmware/mp3data.c +++ b/firmware/mp3data.c @@ -122,39 +122,39 @@ static bool mp3headerinfo(struct mp3info *info, unsigned long header) int freqindex; /* MPEG Audio Version */ - switch(header & VERSION_MASK) { + switch((header & VERSION_MASK) >> 19) { case 0: /* MPEG version 2.5 is not an official standard */ info->version = MPEG_VERSION2_5; bittable = MPEG_VERSION2 - 1; /* use the V2 bit rate table */ break; - - case (1L << 19): + + case 1: return false; - case (2L << 19): + case 2: /* MPEG version 2 (ISO/IEC 13818-3) */ info->version = MPEG_VERSION2; bittable = MPEG_VERSION2 - 1; break; - case (3L << 19): + case 3: /* MPEG version 1 (ISO/IEC 11172-3) */ info->version = MPEG_VERSION1; bittable = MPEG_VERSION1 - 1; break; } - switch(header & LAYER_MASK) { + switch((header & LAYER_MASK) >> 17) { case 0: return false; - case (1L << 17): + case 1: info->layer = 2; break; - case (2L << 17): + case 2: info->layer = 1; break; - case (3L << 17): + case 3: info->layer = 0; break; } @@ -174,7 +174,7 @@ static bool mp3headerinfo(struct mp3info *info, unsigned long header) return false; info->padding = (header & 0x0200)?1:0; - + /* Calculate number of bytes, calculation depends on layer */ switch(info->layer) { case 0: |