bink: make IDCT take 32-bit input

Since IDCT transforming 32-bit input to 8-bit output is unusual and unpractical
for most codecs, move Bink IDCT into separate context. Get rid of an additional
permutation table while at it since SIMD support for Bink IDCT is unlikely to
be implemented in foreseeable future.
Quantisation tables also have to change type to signed for proper
dequantisation of DCT coefficients.

Signed-off-by: Mans Rullgard <mans@mansr.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/libavcodec/binkdsp.h b/libavcodec/binkdsp.h
new file mode 100644
index 0000000000..8253ab3004
--- /dev/null
+++ b/libavcodec/binkdsp.h
@@ -0,0 +1,39 @@
+/*
+ * Bink DSP routines
+ * Copyright (c) 2009 Kostya Shishkov
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Bink DSP routines
+ */
+
+#ifndef AVCODEC_BINKDSP_H
+#define AVCODEC_BINKDSP_H
+
+#include "dsputil.h"
+
+typedef struct BinkDSPContext {
+    void (*idct_put)(uint8_t *dest/*align 8*/, int line_size, int32_t *block/*align 16*/);
+    void (*idct_add)(uint8_t *dest/*align 8*/, int line_size, int32_t *block/*align 16*/);
+} BinkDSPContext;
+
+void ff_binkdsp_init(BinkDSPContext *c);
+
+#endif /* AVCODEC_BINKDSP_H */