mlpdec: Move MLP's filter_channel() to dsputils.

Originally committed as revision 18721 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -125,7 +125,7 @@ OBJS-$(CONFIG_MIMIC_DECODER)           += mimic.o
 OBJS-$(CONFIG_MJPEG_DECODER)           += mjpegdec.o mjpeg.o
 OBJS-$(CONFIG_MJPEG_ENCODER)           += mjpegenc.o mjpeg.o mpegvideo_enc.o motion_est.o ratecontrol.o mpeg12data.o mpegvideo.o
 OBJS-$(CONFIG_MJPEGB_DECODER)          += mjpegbdec.o mjpegdec.o mjpeg.o
-OBJS-$(CONFIG_MLP_DECODER)             += mlpdec.o mlp_parser.o mlp.o
+OBJS-$(CONFIG_MLP_DECODER)             += mlpdec.o mlp_parser.o mlp.o mlpdsp.o
 OBJS-$(CONFIG_MMVIDEO_DECODER)         += mmvideo.o
 OBJS-$(CONFIG_MOTIONPIXELS_DECODER)    += motionpixels.o
 OBJS-$(CONFIG_MP1_DECODER)             += mpegaudiodec.o mpegaudiodecheader.o mpegaudio.o mpegaudiodata.o
@@ -221,7 +221,7 @@ OBJS-$(CONFIG_THP_DECODER)             += mjpegdec.o mjpeg.o
 OBJS-$(CONFIG_TIERTEXSEQVIDEO_DECODER) += tiertexseqv.o
 OBJS-$(CONFIG_TIFF_DECODER)            += tiff.o lzw.o faxcompr.o
 OBJS-$(CONFIG_TIFF_ENCODER)            += tiffenc.o rle.o lzwenc.o
-OBJS-$(CONFIG_TRUEHD_DECODER)          += mlpdec.o mlp_parser.o mlp.o
+OBJS-$(CONFIG_TRUEHD_DECODER)          += mlpdec.o mlp_parser.o mlp.o mlpdsp.o
 OBJS-$(CONFIG_TRUEMOTION1_DECODER)     += truemotion1.o
 OBJS-$(CONFIG_TRUEMOTION2_DECODER)     += truemotion2.o
 OBJS-$(CONFIG_TRUESPEECH_DECODER)      += truespeech.o

libavcodec/dsputil.c

@@ -2754,6 +2754,10 @@ void ff_avg_cavs_qpel16_mc00_c(uint8_t *dst, uint8_t *src, int stride) {
 }
 #endif /* CONFIG_CAVS_DECODER */
 
+#if CONFIG_MLP_DECODER || CONFIG_TRUEHD_DECODER
+    void ff_mlp_init(DSPContext* c, AVCodecContext *avctx);
+#endif
+
 #if CONFIG_VC1_DECODER || CONFIG_WMV3_DECODER
 /* VC-1 specific */
 void ff_vc1dsp_init(DSPContext* c, AVCodecContext *avctx);
@@ -4542,6 +4546,10 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
 #if CONFIG_CAVS_DECODER
     ff_cavsdsp_init(c,avctx);
 #endif
+
+#if CONFIG_MLP_DECODER || CONFIG_TRUEHD_DECODER
+    ff_mlp_init(c, avctx);
+#endif
 #if CONFIG_VC1_DECODER || CONFIG_WMV3_DECODER
     ff_vc1dsp_init(c,avctx);
 #endif

libavcodec/dsputil.h

@@ -475,6 +475,12 @@ typedef struct DSPContext {
 
     void (*shrink[4])(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height);
 
+    /* mlp/truehd functions */
+    void (*mlp_filter_channel)(int32_t *firbuf, const int32_t *fircoeff, int firorder,
+                               int32_t *iirbuf, const int32_t *iircoeff, int iirorder,
+                               unsigned int filter_shift, int32_t mask, int blocksize,
+                               int32_t *sample_buffer);
+
     /* vc1 functions */
     void (*vc1_inv_trans_8x8)(DCTELEM *b);
     void (*vc1_inv_trans_8x4)(uint8_t *dest, int line_size, DCTELEM *block);

libavcodec/mlpdec.c

@@ -27,6 +27,7 @@
 #include <stdint.h>
 
 #include "avcodec.h"
+#include "dsputil.h"
 #include "libavutil/intreadwrite.h"
 #include "get_bits.h"
 #include "libavutil/crc.h"
@@ -144,6 +145,8 @@ typedef struct MLPDecodeContext {
     int8_t      noise_buffer[MAX_BLOCKSIZE_POW2];
     int8_t      bypassed_lsbs[MAX_BLOCKSIZE][MAX_CHANNELS];
     int32_t     sample_buffer[MAX_BLOCKSIZE][MAX_CHANNELS];
+
+    DSPContext  dsp;
 } MLPDecodeContext;
 
 static VLC huff_vlc[3];
@@ -231,6 +234,7 @@ static av_cold int mlp_decode_init(AVCodecContext *avctx)
     m->avctx = avctx;
     for (substr = 0; substr < MAX_SUBSTREAMS; substr++)
         m->substream[substr].lossless_check_data = 0xffffffff;
+    dsputil_init(&m->dsp, avctx);
 
     return 0;
 }
@@ -708,35 +712,17 @@ static void filter_channel(MLPDecodeContext *m, unsigned int substr,
     FilterParams *iir = &m->channel_params[channel].filter_params[IIR];
     unsigned int filter_shift = fir->shift;
     int32_t mask = MSB_MASK(s->quant_step_size[channel]);
-    int i;
 
     memcpy(firbuf, fir->state, MAX_FIR_ORDER * sizeof(int32_t));
     memcpy(iirbuf, iir->state, MAX_IIR_ORDER * sizeof(int32_t));
 
-    for (i = 0; i < s->blocksize; i++) {
-        int32_t residual = m->sample_buffer[i + s->blockpos][channel];
-        unsigned int order;
-        int64_t accum = 0;
-        int32_t result;
-
-        /* TODO: Move this code to DSPContext? */
-
-        for (order = 0; order < fir->order; order++)
-            accum += (int64_t) firbuf[order] * fir->coeff[order];
-        for (order = 0; order < iir->order; order++)
-            accum += (int64_t) iirbuf[order] * iir->coeff[order];
-
-        accum  = accum >> filter_shift;
-        result = (accum + residual) & mask;
-
-        *--firbuf = result;
-        *--iirbuf = result - accum;
-
-        m->sample_buffer[i + s->blockpos][channel] = result;
-    }
+    m->dsp.mlp_filter_channel(firbuf, fir->coeff, fir->order,
+                              iirbuf, iir->coeff, iir->order,
+                              filter_shift, mask, s->blocksize,
+                              &m->sample_buffer[s->blockpos][channel]);
 
-    memcpy(fir->state, firbuf, MAX_FIR_ORDER * sizeof(int32_t));
-    memcpy(iir->state, iirbuf, MAX_IIR_ORDER * sizeof(int32_t));
+    memcpy(fir->state, firbuf - s->blocksize, MAX_FIR_ORDER * sizeof(int32_t));
+    memcpy(iir->state, iirbuf - s->blocksize, MAX_IIR_ORDER * sizeof(int32_t));
 }
 
 /** Read a block of PCM residual data (or actual if no filtering active). */

libavcodec/mlpdsp.c

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2007-2008 Ian Caulfield
+ *               2009 Ramiro Polla
+ *
+ * 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 "dsputil.h"
+
+static void ff_mlp_filter_channel(int32_t *firbuf, const int32_t *fircoeff, int firorder,
+                                  int32_t *iirbuf, const int32_t *iircoeff, int iirorder,
+                                  unsigned int filter_shift, int32_t mask, int blocksize,
+                                  int32_t *sample_buffer)
+{
+    int i;
+
+    for (i = 0; i < blocksize; i++) {
+        int32_t residual = *sample_buffer;
+        unsigned int order;
+        int64_t accum = 0;
+        int32_t result;
+
+        for (order = 0; order < firorder; order++)
+            accum += (int64_t) firbuf[order] * fircoeff[order];
+        for (order = 0; order < iirorder; order++)
+            accum += (int64_t) iirbuf[order] * iircoeff[order];
+
+        accum  = accum >> filter_shift;
+        result = (accum + residual) & mask;
+
+        *--firbuf = result;
+        *--iirbuf = result - accum;
+
+        *sample_buffer = result;
+        sample_buffer += 8;
+    }
+}
+
+void ff_mlp_init(DSPContext* c, AVCodecContext *avctx)
+{
+    c->mlp_filter_channel = ff_mlp_filter_channel;
+}