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authorChristophe Gisquet <christophe.gisquet@gmail.com>2015-02-07 09:20:09 +0000
committerMichael Niedermayer <michaelni@gmx.at>2015-02-07 15:14:32 +0100
commit46e2afa4dcb5ed6b4a6aa7aacbce2df74ed09c03 (patch)
tree98ea0abd13cb7540f21e166f4918eba4f3277b9b /libavcodec
parent1de742145f58b362736e01d6cd0c66c58d6f7533 (diff)
downloadffmpeg-46e2afa4dcb5ed6b4a6aa7aacbce2df74ed09c03.tar.gz
wmalossless: reset lms_update
It may contain garbage at the end, and zeroing allows using DSP with longer loops. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec')
-rw-r--r--libavcodec/wmalosslessdec.c26
1 files changed, 14 insertions, 12 deletions
diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c
index e6e34767bb..557b6b9805 100644
--- a/libavcodec/wmalosslessdec.c
+++ b/libavcodec/wmalosslessdec.c
@@ -147,8 +147,8 @@ typedef struct WmallDecodeCtx {
int coefsend;
int bitsend;
DECLARE_ALIGNED(16, int16_t, coefs)[MAX_ORDER + WMALL_COEFF_PAD_SIZE/sizeof(int16_t)];
- DECLARE_ALIGNED(16, int16_t, lms_prevvalues)[MAX_ORDER * 2];
- DECLARE_ALIGNED(16, int16_t, lms_updates)[MAX_ORDER * 2];
+ DECLARE_ALIGNED(16, int16_t, lms_prevvalues)[MAX_ORDER * 2 + WMALL_COEFF_PAD_SIZE/sizeof(int16_t)];
+ DECLARE_ALIGNED(16, int16_t, lms_updates)[MAX_ORDER * 2 + WMALL_COEFF_PAD_SIZE/sizeof(int16_t)];
int recent;
} cdlms[WMALL_MAX_CHANNELS][9];
@@ -711,17 +711,16 @@ static void lms_update(WmallDecodeCtx *s, int ich, int ilms, int input)
{
int recent = s->cdlms[ich][ilms].recent;
int range = 1 << s->bits_per_sample - 1;
+ int order = s->cdlms[ich][ilms].order;
if (recent)
recent--;
else {
- memcpy(&s->cdlms[ich][ilms].lms_prevvalues[s->cdlms[ich][ilms].order],
- s->cdlms[ich][ilms].lms_prevvalues,
- 2 * s->cdlms[ich][ilms].order);
- memcpy(&s->cdlms[ich][ilms].lms_updates[s->cdlms[ich][ilms].order],
- s->cdlms[ich][ilms].lms_updates,
- 2 * s->cdlms[ich][ilms].order);
- recent = s->cdlms[ich][ilms].order - 1;
+ memcpy(s->cdlms[ich][ilms].lms_prevvalues + order,
+ s->cdlms[ich][ilms].lms_prevvalues, 2 * order);
+ memcpy(s->cdlms[ich][ilms].lms_updates + order,
+ s->cdlms[ich][ilms].lms_updates, 2 * order);
+ recent = order - 1;
}
s->cdlms[ich][ilms].lms_prevvalues[recent] = av_clip(input, -range, range - 1);
@@ -732,9 +731,11 @@ static void lms_update(WmallDecodeCtx *s, int ich, int ilms, int input)
else
s->cdlms[ich][ilms].lms_updates[recent] = s->update_speed[ich];
- s->cdlms[ich][ilms].lms_updates[recent + (s->cdlms[ich][ilms].order >> 4)] >>= 2;
- s->cdlms[ich][ilms].lms_updates[recent + (s->cdlms[ich][ilms].order >> 3)] >>= 1;
+ s->cdlms[ich][ilms].lms_updates[recent + (order >> 4)] >>= 2;
+ s->cdlms[ich][ilms].lms_updates[recent + (order >> 3)] >>= 1;
s->cdlms[ich][ilms].recent = recent;
+ memset(s->cdlms[ich][ilms].lms_updates + recent + order, 0,
+ sizeof(s->cdlms[ich][ilms].lms_updates) - 2*(recent+order));
}
static void use_high_update_speed(WmallDecodeCtx *s, int ich)
@@ -790,7 +791,8 @@ static void revert_cdlms(WmallDecodeCtx *s, int ch,
+ s->cdlms[ch][ilms].recent,
s->cdlms[ch][ilms].lms_updates
+ s->cdlms[ch][ilms].recent,
- s->cdlms[ch][ilms].order,
+ FFALIGN(s->cdlms[ch][ilms].order,
+ WMALL_COEFF_PAD_SIZE),
WMASIGN(residue));
input = residue + (pred >> s->cdlms[ch][ilms].scaling);
lms_update(s, ch, ilms, input);