avcodec: loongson delete invalid simple idct put and add optimization

Change-Id: I23a36c65915f01a1cf20e317c14b8eaaa62958b4
Signed-off-by: ZhouXiaoyong <zhouxiaoyong@loongson.cn>

Fixes Decoding of http://loongnix.org/ftp/multimedia/testing/nanocore_720p_24fps_mpeg4_ac3_short.avi

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit a78656a187)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/mips/idctdsp_init_mips.c

@@ -49,8 +49,6 @@ static av_cold void idctdsp_init_mmi(IDCTDSPContext *c, AVCodecContext *avctx,
         (avctx->bits_per_raw_sample != 10) &&
         (avctx->bits_per_raw_sample != 12) &&
         (avctx->idct_algo == FF_IDCT_AUTO)) {
-                c->idct_put = ff_simple_idct_put_mmi;
-                c->idct_add = ff_simple_idct_add_mmi;
                 c->idct = ff_simple_idct_mmi;
                 c->perm_type = FF_IDCT_PERM_NONE;
     }

libavcodec/mips/simple_idct_mmi.c

@@ -54,7 +54,7 @@ DECLARE_ALIGNED(8, static const int16_t, coeffs)[]= {
                   C3, -C1,               C3, -C1
 };
 
-static void simple_idct_mmi(int16_t *block)
+void ff_simple_idct_mmi(int16_t *block)
 {
         DECLARE_ALIGNED(8, int64_t, align_tmp)[16];
         int16_t * const temp= (int16_t*)align_tmp;
@@ -814,20 +814,3 @@ static void simple_idct_mmi(int16_t *block)
         : "$10","$11"
     );
 }
-
-void ff_simple_idct_mmi(int16_t *block)
-{
-    simple_idct_mmi(block);
-}
-
-void ff_simple_idct_put_mmi(uint8_t *dest, int32_t line_size, int16_t *block)
-{
-    simple_idct_mmi(block);
-    ff_put_pixels_clamped_mmi(block, dest, line_size);
-}
-
-void ff_simple_idct_add_mmi(uint8_t *dest, int32_t line_size, int16_t *block)
-{
-    simple_idct_mmi(block);
-    ff_add_pixels_clamped_mmi(block, dest, line_size);
-}