configure: Document --enable-libfontconfig

[ffmpeg] / libavcodec / dcadsp.c

diff --git a/libavcodec/dcadsp.c b/libavcodec/dcadsp.c
index 8fc49cebda39ee0ff6252e15203088305aed2569..beec2007f63587b130956911995fafcb6692ff80 100644 (file)
--- a/libavcodec/dcadsp.c
+++ b/libavcodec/dcadsp.c
@@ -20,42 +20,49 @@
  */
 
 #include "config.h"
+
 #include "libavutil/attributes.h"
 #include "libavutil/intreadwrite.h"
+
 #include "dcadsp.h"
+#include "dcamath.h"
 
-static void int8x8_fmul_int32_c(float *dst, const int8_t *src, int scale)
+static void decode_hf_c(int32_t dst[DCA_SUBBANDS][SAMPLES_PER_SUBBAND],
+                        const int32_t vq_num[DCA_SUBBANDS],
+                        const int8_t hf_vq[1024][32], intptr_t vq_offset,
+                        int32_t scale[DCA_SUBBANDS][2],
+                        intptr_t start, intptr_t end)
 {
-    float fscale = scale / 16.0;
-    int i;
-    for (i = 0; i < 8; i++)
-        dst[i] = src[i] * fscale;
+    int i, j;
+
+    for (j = start; j < end; j++) {
+        const int8_t *ptr = &hf_vq[vq_num[j]][vq_offset];
+        for (i = 0; i < 8; i++)
+            dst[j][i] = ptr[i] * scale[j][0] + 8 >> 4;
+    }
 }
 
-static inline void
-dca_lfe_fir(float *out, const float *in, const float *coefs,
-            int decifactor)
+static inline void dca_lfe_fir(float *out, const float *in, const float *coefs,
+                               int decifactor)
 {
-    float *out2 = out + decifactor;
-    const float *cf0 = coefs;
-    const float *cf1 = coefs + 256;
+    float *out2    = out + 2 * decifactor - 1;
+    int num_coeffs = 256 / decifactor;
     int j, k;
 
     /* One decimated sample generates 2*decifactor interpolated ones */
     for (k = 0; k < decifactor; k++) {
         float v0 = 0.0;
         float v1 = 0.0;
-        for (j = 0; j < 256 / decifactor; j++) {
-            float s = in[-j];
-            v0 += s * *cf0++;
-            v1 += s * *--cf1;
+        for (j = 0; j < num_coeffs; j++, coefs++) {
+            v0 += in[-j]                 * *coefs;
+            v1 += in[j + 1 - num_coeffs] * *coefs;
         }
         *out++  = v0;
-        *out2++ = v1;
+        *out2-- = v1;
     }
 }
 
-static void dca_qmf_32_subbands(float samples_in[32][8], int sb_act,
+static void dca_qmf_32_subbands(float samples_in[DCA_SUBBANDS][SAMPLES_PER_SUBBAND], int sb_act,
                                 SynthFilterContext *synth, FFTContext *imdct,
                                 float synth_buf_ptr[512],
                                 int *synth_buf_offset, float synth_buf2[32],
@@ -78,11 +85,28 @@ static void dca_qmf_32_subbands(float samples_in[32][8], int sb_act,
         }
 
         synth->synth_filter_float(imdct, synth_buf_ptr, synth_buf_offset,
-                                  synth_buf2, window, samples_out, raXin, scale);
+                                  synth_buf2, window, samples_out, raXin,
+                                  scale);
         samples_out += 32;
     }
 }
 
+static void dequantize_c(int32_t *samples, uint32_t step_size, uint32_t scale)
+{
+    int64_t step = (int64_t)step_size * scale;
+    int shift, i;
+    int32_t step_scale;
+
+    if (step > (1 << 23))
+        shift = av_log2(step >> 23) + 1;
+    else
+        shift = 0;
+    step_scale = (int32_t)(step >> shift);
+
+    for (i = 0; i < SAMPLES_PER_SUBBAND; i++)
+        samples[i] = dca_clip23(dca_norm((int64_t)samples[i] * step_scale, 22 - shift));
+}
+
 static void dca_lfe_fir0_c(float *out, const float *in, const float *coefs)
 {
     dca_lfe_fir(out, in, coefs, 32);
@@ -95,10 +119,16 @@ static void dca_lfe_fir1_c(float *out, const float *in, const float *coefs)
 
 av_cold void ff_dcadsp_init(DCADSPContext *s)
 {
-    s->lfe_fir[0] = dca_lfe_fir0_c;
-    s->lfe_fir[1] = dca_lfe_fir1_c;
+    s->lfe_fir[0]      = dca_lfe_fir0_c;
+    s->lfe_fir[1]      = dca_lfe_fir1_c;
     s->qmf_32_subbands = dca_qmf_32_subbands;
-    s->int8x8_fmul_int32 = int8x8_fmul_int32_c;
-    if (ARCH_ARM) ff_dcadsp_init_arm(s);
-    if (ARCH_X86) ff_dcadsp_init_x86(s);
+    s->decode_hf       = decode_hf_c;
+    s->dequantize      = dequantize_c;
+
+    if (ARCH_AARCH64)
+        ff_dcadsp_init_aarch64(s);
+    if (ARCH_ARM)
+        ff_dcadsp_init_arm(s);
+    if (ARCH_X86)
+        ff_dcadsp_init_x86(s);
 }