For #1685: Cross build RTC with FFmpeg

trunk/3rdparty/ffmpeg-4-fit/libavcodec/arm/mlpdsp_init_arm.c

@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2014 RISC OS Open Ltd
+ * Author: Ben Avison <bavison@riscosopen.org>
+ *
+ * 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 <stdint.h>
+
+#include "libavutil/arm/cpu.h"
+#include "libavutil/attributes.h"
+#include "libavcodec/mlpdsp.h"
+
+void ff_mlp_filter_channel_arm(int32_t *state, const int32_t *coeff,
+                               int firorder, int iirorder,
+                               unsigned int filter_shift, int32_t mask,
+                               int blocksize, int32_t *sample_buffer);
+void ff_mlp_rematrix_channel_arm(int32_t *samples,
+                                 const int32_t *coeffs,
+                                 const uint8_t *bypassed_lsbs,
+                                 const int8_t *noise_buffer,
+                                 int index,
+                                 unsigned int dest_ch,
+                                 uint16_t blockpos,
+                                 unsigned int maxchan,
+                                 int matrix_noise_shift,
+                                 int access_unit_size_pow2,
+                                 int32_t mask);
+
+#define DECLARE_PACK(order,channels,shift) \
+    int32_t ff_mlp_pack_output_##order##order_##channels##ch_##shift##shift_armv6(int32_t, uint16_t, int32_t (*)[], void *, uint8_t*, int8_t *, uint8_t, int);
+#define ENUMERATE_PACK(order,channels,shift) \
+    ff_mlp_pack_output_##order##order_##channels##ch_##shift##shift_armv6,
+#define PACK_CHANNELS(macro,order,channels) \
+        macro(order,channels,0) \
+        macro(order,channels,1) \
+        macro(order,channels,2) \
+        macro(order,channels,3) \
+        macro(order,channels,4) \
+        macro(order,channels,5) \
+        macro(order,channels,mixed)
+#define PACK_ORDER(macro,order) \
+        PACK_CHANNELS(macro,order,2) \
+        PACK_CHANNELS(macro,order,6) \
+        PACK_CHANNELS(macro,order,8)
+#define PACK_ALL(macro) \
+        PACK_ORDER(macro,outof) \
+        PACK_ORDER(macro,in)
+PACK_ALL(DECLARE_PACK)
+
+#define ff_mlp_pack_output_outoforder_2ch_mixedshift_armv6 0
+#define ff_mlp_pack_output_outoforder_6ch_mixedshift_armv6 0
+#define ff_mlp_pack_output_outoforder_8ch_mixedshift_armv6 0
+#if CONFIG_THUMB
+#define ff_mlp_pack_output_outoforder_2ch_0shift_armv6 0
+#define ff_mlp_pack_output_outoforder_2ch_1shift_armv6 0
+#define ff_mlp_pack_output_outoforder_2ch_2shift_armv6 0
+#define ff_mlp_pack_output_outoforder_2ch_3shift_armv6 0
+#define ff_mlp_pack_output_outoforder_2ch_4shift_armv6 0
+#define ff_mlp_pack_output_outoforder_2ch_5shift_armv6 0
+#define ff_mlp_pack_output_outoforder_6ch_0shift_armv6 0
+#define ff_mlp_pack_output_outoforder_6ch_1shift_armv6 0
+#define ff_mlp_pack_output_outoforder_6ch_2shift_armv6 0
+#define ff_mlp_pack_output_outoforder_6ch_3shift_armv6 0
+#define ff_mlp_pack_output_outoforder_6ch_4shift_armv6 0
+#define ff_mlp_pack_output_outoforder_6ch_5shift_armv6 0
+#define ff_mlp_pack_output_outoforder_8ch_0shift_armv6 0
+#define ff_mlp_pack_output_outoforder_8ch_1shift_armv6 0
+#define ff_mlp_pack_output_outoforder_8ch_2shift_armv6 0
+#define ff_mlp_pack_output_outoforder_8ch_3shift_armv6 0
+#define ff_mlp_pack_output_outoforder_8ch_4shift_armv6 0
+#define ff_mlp_pack_output_outoforder_8ch_5shift_armv6 0
+#endif
+
+static int32_t (*mlp_select_pack_output_armv6(uint8_t *ch_assign,
+                                              int8_t *output_shift,
+                                              uint8_t max_matrix_channel,
+                                              int is32))(int32_t, uint16_t, int32_t (*)[], void *, uint8_t*, int8_t *, uint8_t, int)
+{
+    int ch_index;
+    int shift = output_shift[0] < 0 || output_shift[0] > 5 ? 6 : output_shift[0];
+    int inorder = 1;
+    static int32_t (*const routine[2*3*7])(int32_t, uint16_t, int32_t (*)[], void *, uint8_t*, int8_t *, uint8_t, int) = {
+            PACK_ALL(ENUMERATE_PACK)
+    };
+    int i;
+
+    if (!is32) // don't support 16-bit output (it's not used by TrueHD)
+        return ff_mlp_pack_output;
+
+    switch (max_matrix_channel) {
+    case 1:
+        ch_index = 0;
+        break;
+    case 5:
+        ch_index = 1;
+        break;
+    case 7:
+        ch_index = 2;
+        break;
+    default:
+        return ff_mlp_pack_output;
+    }
+
+    for (i = 0; i <= max_matrix_channel; i++) {
+        if (shift != 6 && output_shift[i] != shift)
+            shift = 6; // indicate mixed shifts
+        if (ch_assign[i] != i)
+            inorder = 0;
+    }
+#if CONFIG_THUMB
+    if (!inorder)
+        return ff_mlp_pack_output; // can't currently handle an order array except in ARM mode
+#else
+    if (shift == 6 && !inorder)
+        return ff_mlp_pack_output; // can't currently handle both an order array and a shift array
+#endif
+
+    return routine[(inorder*3+ch_index)*7+shift];
+}
+
+av_cold void ff_mlpdsp_init_arm(MLPDSPContext *c)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (have_armv5te(cpu_flags)) {
+        c->mlp_filter_channel = ff_mlp_filter_channel_arm;
+        c->mlp_rematrix_channel = ff_mlp_rematrix_channel_arm;
+    }
+    if (have_armv6(cpu_flags))
+        c->mlp_select_pack_output = mlp_select_pack_output_armv6;
+}