Optimization of MP3 decoders for MIPS

MP3 fixed and floating point decoders are optimized
 for MIPS architecture.
Signed-off-by: Nedeljko Babic <nbabic@mips.com>
Reviewed-by: Vitor Sessak <vitor1001@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/mips/Makefile

@@ -11,3 +11,5 @@ MIPSFPU-OBJS-$(CONFIG_AMRWB_DECODER)      += mips/acelp_filters_mips.o     \
                                              mips/amrwbdec_mips.o          \
                                              mips/celp_math_mips.o         \
                                              mips/acelp_vectors_mips.o
+MIPSFPU-OBJS-$(CONFIG_MPEGAUDIODSP)       += mips/mpegaudiodsp_mips_float.o
+MIPSDSPR1-OBJS-$(CONFIG_MPEGAUDIODSP)     += mips/mpegaudiodsp_mips_fixed.o

libavcodec/mpegaudiodec.c

@@ -1169,6 +1169,17 @@ found2:
     }
 }
 
+#if CONFIG_FLOAT
+#if HAVE_MIPSFPU
+#   include "mips/compute_antialias_float.h"
+#endif /* HAVE_MIPSFPU */
+#else
+#if HAVE_MIPSDSPR1
+#   include "mips/compute_antialias_fixed.h"
+#endif /* HAVE_MIPSDSPR1 */
+#endif /* CONFIG_FLOAT */
+
+#ifndef compute_antialias
 #if CONFIG_FLOAT
 #define AA(j) do {                                                      \
         float tmp0 = ptr[-1-j];                                         \
@@ -1215,6 +1226,7 @@ static void compute_antialias(MPADecodeContext *s, GranuleDef *g)
         ptr += 18;
     }
 }
+#endif /* compute_antialias */
 
 static void compute_imdct(MPADecodeContext *s, GranuleDef *g,
                           INTFLOAT *sb_samples, INTFLOAT *mdct_buf)

libavcodec/mpegaudiodsp.c

@@ -43,4 +43,6 @@ void ff_mpadsp_init(MPADSPContext *s)
     if (ARCH_ARM)     ff_mpadsp_init_arm(s);
     if (HAVE_MMX)     ff_mpadsp_init_mmx(s);
     if (HAVE_ALTIVEC) ff_mpadsp_init_altivec(s);
+    if (HAVE_MIPSFPU)   ff_mpadsp_init_mipsfpu(s);
+    if (HAVE_MIPSDSPR1) ff_mpadsp_init_mipsdspr1(s);
 }

libavcodec/mpegaudiodsp.h

@@ -56,6 +56,8 @@ void ff_mpa_synth_filter_float(MPADSPContext *s,
 void ff_mpadsp_init_arm(MPADSPContext *s);
 void ff_mpadsp_init_mmx(MPADSPContext *s);
 void ff_mpadsp_init_altivec(MPADSPContext *s);
+void ff_mpadsp_init_mipsfpu(MPADSPContext *s);
+void ff_mpadsp_init_mipsdspr1(MPADSPContext *s);
 
 void ff_mpa_synth_init_float(float *window);
 void ff_mpa_synth_init_fixed(int32_t *window);