svq3: rip out the svq3-relevant parts of pred_motion() out of h264

[ffmpeg] / libavcodec / ac3dsp.h

diff --git a/libavcodec/ac3dsp.h b/libavcodec/ac3dsp.h
index 882eb7681aced6fdb84c2c10e856dd6f13192494..6ca0c5b8e87d62809ffd627d231292a02e77ed2f 100644 (file)
--- a/libavcodec/ac3dsp.h
+++ b/libavcodec/ac3dsp.h
@@ -1,5 +1,5 @@
 /*
- * AC-3 DSP utils
+ * AC-3 DSP functions
  * Copyright (c) 2011 Justin Ruggles
  *
  * This file is part of Libav.
@@ -128,6 +128,20 @@ typedef struct AC3DSPContext {
 
     void (*downmix)(float **samples, float (*matrix)[2], int out_ch,
                     int in_ch, int len);
+
+    /**
+     * Apply symmetric window in 16-bit fixed-point.
+     * @param output destination array
+     *               constraints: 16-byte aligned
+     * @param input  source array
+     *               constraints: 16-byte aligned
+     * @param window window array
+     *               constraints: 16-byte aligned, at least len/2 elements
+     * @param len    full window length
+     *               constraints: multiple of ? greater than zero
+     */
+    void (*apply_window_int16)(int16_t *output, const int16_t *input,
+                               const int16_t *window, unsigned int len);
 } AC3DSPContext;
 
 void ff_ac3dsp_init    (AC3DSPContext *c, int bit_exact);