g722: Split out g722_qmf_apply() function into g722dsp.c

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Martin Storsjö <martin@martin.st>

libavcodec/Makefile

@@ -511,8 +511,8 @@ OBJS-$(CONFIG_ADPCM_EA_R1_DECODER)        += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_EA_R2_DECODER)        += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_EA_R3_DECODER)        += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_EA_XAS_DECODER)       += adpcm.o adpcm_data.o
-OBJS-$(CONFIG_ADPCM_G722_DECODER)         += g722.o g722dec.o
+OBJS-$(CONFIG_ADPCM_G722_DECODER)         += g722.o g722dsp.o g722dec.o
-OBJS-$(CONFIG_ADPCM_G722_ENCODER)         += g722.o g722enc.o
+OBJS-$(CONFIG_ADPCM_G722_ENCODER)         += g722.o g722dsp.o g722enc.o
 OBJS-$(CONFIG_ADPCM_G726_DECODER)         += g726.o
 OBJS-$(CONFIG_ADPCM_G726_ENCODER)         += g726.o
 OBJS-$(CONFIG_ADPCM_IMA_AMV_DECODER)      += adpcm.o adpcm_data.o

libavcodec/g722.c

@@ -71,16 +71,6 @@ const int16_t ff_g722_low_inv_quant6[64] = {
      211,   170,   130,    91,    54,    17,   -54,   -17
 };
 
-/**
- * quadrature mirror filter (QMF) coefficients
- *
- * ITU-T G.722 Table 11
- */
-static const int16_t qmf_coeffs[12] = {
-    3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11,
-};
-
-
 /**
  * adaptive predictor
  *
@@ -157,15 +147,3 @@ void ff_g722_update_high_predictor(struct G722Band *band, const int dhigh,
                                  high_log_factor_step[ihigh&1], 0, 22528);
     band->scale_factor = linear_scale_factor(band->log_factor - (10 << 11));
 }
-
-void ff_g722_apply_qmf(const int16_t *prev_samples, int *xout1, int *xout2)
-{
-    int i;
-
-    *xout1 = 0;
-    *xout2 = 0;
-    for (i = 0; i < 12; i++) {
-        MAC16(*xout2, prev_samples[2*i  ], qmf_coeffs[i   ]);
-        MAC16(*xout1, prev_samples[2*i+1], qmf_coeffs[11-i]);
-    }
-}

libavcodec/g722.h

@@ -27,6 +27,7 @@
 
 #include <stdint.h>
 #include "avcodec.h"
+#include "g722dsp.h"
 
 #define PREV_SAMPLES_BUF_SIZE 1024
 
@@ -61,6 +62,8 @@ typedef struct G722Context {
         int value;
         int prev;
     } *paths[2];
+
+    G722DSPContext dsp;
 } G722Context;
 
 extern const int16_t ff_g722_high_inv_quant[4];
@@ -72,6 +75,4 @@ void ff_g722_update_low_predictor(struct G722Band *band, const int ilow);
 void ff_g722_update_high_predictor(struct G722Band *band, const int dhigh,
                                    const int ihigh);
 
-void ff_g722_apply_qmf(const int16_t *prev_samples, int *xout1, int *xout2);
-
 #endif /* AVCODEC_G722_H */

libavcodec/g722dec.c

@@ -67,6 +67,8 @@ static av_cold int g722_decode_init(AVCodecContext * avctx)
     c->band[1].scale_factor = 2;
     c->prev_samples_pos = 22;
 
+    ff_g722dsp_init(&c->dsp);
+
     return 0;
 }
 
@@ -122,8 +124,8 @@ static int g722_decode_frame(AVCodecContext *avctx, void *data,
 
         c->prev_samples[c->prev_samples_pos++] = rlow + rhigh;
         c->prev_samples[c->prev_samples_pos++] = rlow - rhigh;
-        ff_g722_apply_qmf(c->prev_samples + c->prev_samples_pos - 24,
+        c->dsp.apply_qmf(c->prev_samples + c->prev_samples_pos - 24,
-                          &xout1, &xout2);
+                         &xout1, &xout2);
         *out_buf++ = av_clip_int16(xout1 >> 11);
         *out_buf++ = av_clip_int16(xout2 >> 11);
         if (c->prev_samples_pos >= PREV_SAMPLES_BUF_SIZE) {

libavcodec/g722dsp.c

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2015 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "g722dsp.h"
+#include "mathops.h"
+
+/*
+ * quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined
+ * in code below: 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11
+ */
+static const int16_t qmf_coeffs[12] = {
+    3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11,
+};
+
+static void g722_apply_qmf(const int16_t *prev_samples, int *xout1, int *xout2)
+{
+    int i;
+
+    *xout1 = 0;
+    *xout2 = 0;
+    for (i = 0; i < 12; i++) {
+        MAC16(*xout2, prev_samples[2*i  ], qmf_coeffs[i   ]);
+        MAC16(*xout1, prev_samples[2*i+1], qmf_coeffs[11-i]);
+    }
+}
+
+av_cold void ff_g722dsp_init(G722DSPContext *c)
+{
+    c->apply_qmf = g722_apply_qmf;
+}

libavcodec/g722dsp.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2015 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_G722DSP_H
+#define AVCODEC_G722DSP_H
+
+#include <stdint.h>
+
+typedef struct G722DSPContext {
+    void (*apply_qmf)(const int16_t *prev_samples, int *xout1, int *xout2);
+} G722DSPContext;
+
+void ff_g722dsp_init(G722DSPContext *c);
+
+#endif /* AVCODEC_G722DSP_H */

libavcodec/g722enc.c

@@ -119,6 +119,8 @@ static av_cold int g722_encode_init(AVCodecContext * avctx)
         }
     }
 
+    ff_g722dsp_init(&c->dsp);
+
     return 0;
 error:
     g722_encode_close(avctx);
@@ -138,7 +140,7 @@ static inline void filter_samples(G722Context *c, const int16_t *samples,
     int xout1, xout2;
     c->prev_samples[c->prev_samples_pos++] = samples[0];
     c->prev_samples[c->prev_samples_pos++] = samples[1];
-    ff_g722_apply_qmf(c->prev_samples + c->prev_samples_pos - 24, &xout1, &xout2);
+    c->dsp.apply_qmf(c->prev_samples + c->prev_samples_pos - 24, &xout1, &xout2);
     *xlow  = xout1 + xout2 >> 14;
     *xhigh = xout1 - xout2 >> 14;
     if (c->prev_samples_pos >= PREV_SAMPLES_BUF_SIZE) {