swresample/x86: add support for exact_rational

phase_shift and phase_mask is removed
generally exact_rational=on is faster than exact_rational=off
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>

libswresample/resample.c

@@ -349,8 +349,6 @@ static ResampleContext *resample_init(ResampleContext *c, int out_rate, int in_r
             goto error;
         }
 
-        c->phase_shift   = phase_shift;
-        c->phase_mask    = phase_count - 1;
         c->phase_count   = phase_count;
         c->linear        = linear;
         c->factor        = factor;

libswresample/resample.h

@@ -40,9 +40,6 @@ typedef struct ResampleContext {
     int frac;
     int src_incr;
     int compensation_distance;
-    /* TODO remove phase_shift and phase_mask */
-    attribute_deprecated int phase_shift;
-    attribute_deprecated int phase_mask;
     int phase_count;
     int linear;
     enum SwrFilterType filter_type;

libswresample/x86/resample_init.c

@@ -47,10 +47,6 @@ av_cold void swri_resample_dsp_x86_init(ResampleContext *c)
 {
     int av_unused mm_flags = av_get_cpu_flags();
 
-    /* FIXME use phase_count on asm */
-    if (c->phase_count != 1 << c->phase_shift)
-        return;
-
     switch(c->format){
     case AV_SAMPLE_FMT_S16P:
         if (ARCH_X86_32 && EXTERNAL_MMXEXT(mm_flags)) {