tta: split off hybrid filter processing as ttadsp

Signed-off-by: James Almer <jamrial@gmail.com>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

4 files changed, 94 insertions, 33 deletions

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 3c3b4ff576..15a4415b3e 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -445,7 +445,7 @@ OBJS-$(CONFIG_TRUEMOTION2_DECODER)     += truemotion2.o
 OBJS-$(CONFIG_TRUESPEECH_DECODER)      += truespeech.o
 OBJS-$(CONFIG_TSCC_DECODER)            += tscc.o msrledec.o
 OBJS-$(CONFIG_TSCC2_DECODER)           += tscc2.o
-OBJS-$(CONFIG_TTA_DECODER)             += tta.o ttadata.o
+OBJS-$(CONFIG_TTA_DECODER)             += tta.o ttadata.o ttadsp.o
 OBJS-$(CONFIG_TTA_ENCODER)             += ttaenc.o ttadata.o
 OBJS-$(CONFIG_TWINVQ_DECODER)          += twinvqdec.o twinvq.o
 OBJS-$(CONFIG_TXD_DECODER)             += txd.o s3tc.o
diff --git a/libavcodec/tta.c b/libavcodec/tta.c
index b917881d65..19cdd8c7b2 100644
--- a/libavcodec/tta.c
+++ b/libavcodec/tta.c
@@ -30,6 +30,7 @@
 #define BITSTREAM_READER_LE
 #include <limits.h>
 #include "ttadata.h"
+#include "ttadsp.h"
 #include "avcodec.h"
 #include "get_bits.h"
 #include "thread.h"
@@ -56,39 +57,9 @@ typedef struct TTAContext {
     uint8_t crc_pass[8];
     uint8_t *pass;
     TTAChannel *ch_ctx;
+    TTADSPContext dsp;
 } TTAContext;
 
-static inline void ttafilter_process(TTAFilter *c, int32_t *in)
-{
-    register int32_t *dl = c->dl, *qm = c->qm, *dx = c->dx, sum = c->round;
-
-    if (c->error < 0) {
-        qm[0] -= dx[0]; qm[1] -= dx[1]; qm[2] -= dx[2]; qm[3] -= dx[3];
-        qm[4] -= dx[4]; qm[5] -= dx[5]; qm[6] -= dx[6]; qm[7] -= dx[7];
-    } else if (c->error > 0) {
-        qm[0] += dx[0]; qm[1] += dx[1]; qm[2] += dx[2]; qm[3] += dx[3];
-        qm[4] += dx[4]; qm[5] += dx[5]; qm[6] += dx[6]; qm[7] += dx[7];
-    }
-
-    sum += dl[0] * qm[0] + dl[1] * qm[1] + dl[2] * qm[2] + dl[3] * qm[3] +
-           dl[4] * qm[4] + dl[5] * qm[5] + dl[6] * qm[6] + dl[7] * qm[7];
-
-    dx[0] = dx[1]; dx[1] = dx[2]; dx[2] = dx[3]; dx[3] = dx[4];
-    dl[0] = dl[1]; dl[1] = dl[2]; dl[2] = dl[3]; dl[3] = dl[4];
-
-    dx[4] = ((dl[4] >> 30) | 1);
-    dx[5] = ((dl[5] >> 30) | 2) & ~1;
-    dx[6] = ((dl[6] >> 30) | 2) & ~1;
-    dx[7] = ((dl[7] >> 30) | 4) & ~3;
-
-    c->error = *in;
-    *in += (sum >> c->shift);
-
-    dl[4] = -dl[5]; dl[5] = -dl[6];
-    dl[6] = *in - dl[7]; dl[7] = *in;
-    dl[5] += dl[6]; dl[4] += dl[5];
-}
-
 static const int64_t tta_channel_layouts[7] = {
     AV_CH_LAYOUT_STEREO,
     AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,
@@ -234,6 +205,8 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)
         return AVERROR_INVALIDDATA;
     }
 
+    ff_ttadsp_init(&s->dsp);
+
     return allocate_buffers(avctx);
 }
 
@@ -335,7 +308,8 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
         *p = 1 + ((value >> 1) ^ ((value & 1) - 1));
 
         // run hybrid filter
-        ttafilter_process(filter, p);
+        s->dsp.ttafilter_process_dec(filter->qm, filter->dx, filter->dl, &filter->error, p,
+                                     filter->shift, filter->round);
 
         // fixed order prediction
 #define PRED(x, k) (int32_t)((((uint64_t)x << k) - x) >> k)
diff --git a/libavcodec/ttadsp.c b/libavcodec/ttadsp.c
new file mode 100644
index 0000000000..691824b0d2
--- /dev/null
+++ b/libavcodec/ttadsp.c
@@ -0,0 +1,54 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "ttadsp.h"
+
+static void ttafilter_process_dec_c(int32_t *qm, int32_t *dx, int32_t *dl,
+                                    int32_t *error, int32_t *in, int32_t shift,
+                                    int32_t round) {
+    if (*error < 0) {
+        qm[0] -= dx[0]; qm[1] -= dx[1]; qm[2] -= dx[2]; qm[3] -= dx[3];
+        qm[4] -= dx[4]; qm[5] -= dx[5]; qm[6] -= dx[6]; qm[7] -= dx[7];
+    } else if (*error > 0) {
+        qm[0] += dx[0]; qm[1] += dx[1]; qm[2] += dx[2]; qm[3] += dx[3];
+        qm[4] += dx[4]; qm[5] += dx[5]; qm[6] += dx[6]; qm[7] += dx[7];
+    }
+
+    round +=    dl[0] * qm[0] + dl[1] * qm[1] + dl[2] * qm[2] + dl[3] * qm[3] +
+                dl[4] * qm[4] + dl[5] * qm[5] + dl[6] * qm[6] + dl[7] * qm[7];
+
+    dx[0] = dx[1]; dx[1] = dx[2]; dx[2] = dx[3]; dx[3] = dx[4];
+    dl[0] = dl[1]; dl[1] = dl[2]; dl[2] = dl[3]; dl[3] = dl[4];
+
+    dx[4] = ((dl[4] >> 30) | 1);
+    dx[5] = ((dl[5] >> 30) | 2) & ~1;
+    dx[6] = ((dl[6] >> 30) | 2) & ~1;
+    dx[7] = ((dl[7] >> 30) | 4) & ~3;
+
+    *error = *in;
+    *in += (round >> shift);
+
+    dl[4] = -dl[5]; dl[5] = -dl[6];
+    dl[6] = *in - dl[7]; dl[7] = *in;
+    dl[5] += dl[6]; dl[4] += dl[5];
+}
+
+av_cold void ff_ttadsp_init(TTADSPContext *c)
+{
+    c->ttafilter_process_dec = ttafilter_process_dec_c;
+}
diff --git a/libavcodec/ttadsp.h b/libavcodec/ttadsp.h
new file mode 100644
index 0000000000..5e88e47816
--- /dev/null
+++ b/libavcodec/ttadsp.h
@@ -0,0 +1,33 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_TTADSP_H
+#define AVCODEC_TTADSP_H
+
+#include <stdint.h>
+#include "ttadata.h"
+
+typedef struct TTADSPContext {
+    void (*ttafilter_process_dec)(int32_t *qm, int32_t *dx, int32_t *dl,
+                                  int32_t *error, int32_t *in, int32_t shift,
+                                  int32_t round);
+} TTADSPContext;
+
+void ff_ttadsp_init(TTADSPContext *c);
+
+#endif /* AVCODEC_TTADSP_H */