lavr: x86: optimized 2-channel s16 to fltp conversion

libavresample/x86/audio_convert.asm

@@ -34,6 +34,7 @@ pb_shuf_unpack_even:      db -1, -1,  0,  1, -1, -1,  2,  3, -1, -1,  8,  9, -1,
 pb_shuf_unpack_odd:       db -1, -1,  4,  5, -1, -1,  6,  7, -1, -1, 12, 13, -1, -1, 14, 15
 pb_interleave_words: SHUFFLE_MASK_W  0,  4,  1,  5,  2,  6,  3,  7
 pb_deinterleave_words: SHUFFLE_MASK_W  0,  2,  4,  6,  1,  3,  5,  7
+pw_zero_even:     times 4 dw 0x0000, 0xffff
 
 SECTION_TEXT
 
@@ -923,3 +924,41 @@ CONV_S16_TO_S16P_6CH
 INIT_XMM avx
 CONV_S16_TO_S16P_6CH
 %endif
+
+;------------------------------------------------------------------------------
+; void ff_conv_s16_to_fltp_2ch(float *const *dst, int16_t *src, int len,
+;                              int channels);
+;------------------------------------------------------------------------------
+
+%macro CONV_S16_TO_FLTP_2CH 0
+cglobal conv_s16_to_fltp_2ch, 3,4,5, dst0, src, len, dst1
+    lea       lenq, [4*lend]
+    mov      dst1q, [dst0q+gprsize]
+    mov      dst0q, [dst0q        ]
+    add       srcq, lenq
+    add      dst0q, lenq
+    add      dst1q, lenq
+    neg       lenq
+    mova        m3, [pf_s32_inv_scale]
+    mova        m4, [pw_zero_even]
+.loop:
+    mova        m1, [srcq+lenq]
+    pslld       m0, m1, 16
+    pand        m1, m4
+    cvtdq2ps    m0, m0
+    cvtdq2ps    m1, m1
+    mulps       m0, m0, m3
+    mulps       m1, m1, m3
+    mova  [dst0q+lenq], m0
+    mova  [dst1q+lenq], m1
+    add       lenq, mmsize
+    jl .loop
+    REP_RET
+%endmacro
+
+INIT_XMM sse2
+CONV_S16_TO_FLTP_2CH
+%if HAVE_AVX
+INIT_XMM avx
+CONV_S16_TO_FLTP_2CH
+%endif

libavresample/x86/audio_convert_init.c

@@ -106,6 +106,11 @@ extern void ff_conv_s16_to_s16p_6ch_ssse3(int16_t *const *dst, int16_t *src,
 extern void ff_conv_s16_to_s16p_6ch_avx  (int16_t *const *dst, int16_t *src,
                                           int len, int channels);
 
+extern void ff_conv_s16_to_fltp_2ch_sse2(float *const *dst, int16_t *src,
+                                         int len, int channels);
+extern void ff_conv_s16_to_fltp_2ch_avx (float *const *dst, int16_t *src,
+                                         int len, int channels);
+
 av_cold void ff_audio_convert_init_x86(AudioConvert *ac)
 {
 #if HAVE_YASM
@@ -157,6 +162,8 @@ av_cold void ff_audio_convert_init_x86(AudioConvert *ac)
                                   2, 16, 8, "SSE2", ff_conv_s16_to_s16p_2ch_sse2);
         ff_audio_convert_set_func(ac, AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_S16,
                                   6, 16, 4, "SSE2", ff_conv_s16_to_s16p_6ch_sse2);
+        ff_audio_convert_set_func(ac, AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_S16,
+                                  2, 16, 8, "SSE2", ff_conv_s16_to_fltp_2ch_sse2);
     }
     if (mm_flags & AV_CPU_FLAG_SSSE3 && HAVE_SSE) {
         ff_audio_convert_set_func(ac, AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16P,
@@ -195,6 +202,8 @@ av_cold void ff_audio_convert_init_x86(AudioConvert *ac)
                                   2, 16, 8, "AVX", ff_conv_s16_to_s16p_2ch_avx);
         ff_audio_convert_set_func(ac, AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_S16,
                                   6, 16, 4, "AVX", ff_conv_s16_to_s16p_6ch_avx);
+        ff_audio_convert_set_func(ac, AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_S16,
+                                  2, 16, 8, "AVX", ff_conv_s16_to_fltp_2ch_avx);
     }
 #endif
 }