dsputil: Remove dct_bits

dct_bits is never set except in h264, where it is never used,
thus remove it.
Signed-off-by: Martin Storsjö <martin@martin.st>

libavcodec/dsputil.c

@@ -2736,18 +2736,10 @@ av_cold void ff_dsputil_init(DSPContext* c, AVCodecContext *avctx)
 
     switch (avctx->bits_per_raw_sample) {
     case 9:
-        if (c->dct_bits == 32) {
-            BIT_DEPTH_FUNCS(9, _32);
-        } else {
-            BIT_DEPTH_FUNCS(9, _16);
-        }
+        BIT_DEPTH_FUNCS(9, _16);
         break;
     case 10:
-        if (c->dct_bits == 32) {
-            BIT_DEPTH_FUNCS(10, _32);
-        } else {
-            BIT_DEPTH_FUNCS(10, _16);
-        }
+        BIT_DEPTH_FUNCS(10, _16);
         break;
     default:
         BIT_DEPTH_FUNCS(8, _16);

libavcodec/dsputil.h

@@ -125,11 +125,6 @@ void ff_init_scantable_permutation(uint8_t *idct_permutation,
  * DSPContext.
  */
 typedef struct DSPContext {
-    /**
-     * Size of DCT coefficients.
-     */
-    int dct_bits;
-
     /* pixel ops : interface with DCT */
     void (*get_pixels)(int16_t *block/*align 16*/, const uint8_t *pixels/*align 8*/, int line_size);
     void (*diff_pixels)(int16_t *block/*align 16*/, const uint8_t *s1/*align 8*/, const uint8_t *s2/*align 8*/, int stride);

libavcodec/h264.c

@@ -2912,7 +2912,6 @@ static int h264_set_parameter_from_sps(H264Context *h)
             ff_h264qpel_init(&h->h264qpel, h->sps.bit_depth_luma);
             ff_h264_pred_init(&h->hpc, h->avctx->codec_id, h->sps.bit_depth_luma,
                               h->sps.chroma_format_idc);
-            h->dsp.dct_bits = h->sps.bit_depth_luma > 8 ? 32 : 16;
             if (CONFIG_ERROR_RESILIENCE)
                 ff_dsputil_init(&h->dsp, h->avctx);
             ff_videodsp_init(&h->vdsp, h->sps.bit_depth_luma);