Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 112 insertions, 0 deletions

diff --git a/media/ffvpx/libavcodec/rl.h b/media/ffvpx/libavcodec/rl.h
new file mode 100644
index 0000000000..4380fda272
--- /dev/null
+++ b/media/ffvpx/libavcodec/rl.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2000-2002 Fabrice Bellard
+ * Copyright (c) 2002-2004 Michael Niedermayer
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * rl header.
+ */
+
+#ifndef AVCODEC_RL_H
+#define AVCODEC_RL_H
+
+#include <stdint.h>
+
+#include "vlc.h"
+
+/* run length table */
+#define MAX_RUN    64
+#define MAX_LEVEL  64
+
+/** RLTable. */
+typedef struct RLTable {
+    int n;                         ///< number of entries of table_vlc minus 1
+    int last;                      ///< number of values for last = 0
+    const uint16_t (*table_vlc)[2];
+    const int8_t *table_run;
+    const int8_t *table_level;
+    uint8_t *index_run[2];         ///< encoding only
+    int8_t *max_level[2];          ///< encoding & decoding
+    int8_t *max_run[2];            ///< encoding & decoding
+    RL_VLC_ELEM *rl_vlc[32];       ///< decoding only
+} RLTable;
+
+/**
+ * Initialize max_level and index_run from table_run and table_level;
+ * this is equivalent to initializing RLTable.max_level[0] and
+ * RLTable.index_run[0] with ff_rl_init().
+ */
+void ff_rl_init_level_run(uint8_t max_level[MAX_LEVEL + 1],
+                          uint8_t index_run[MAX_RUN + 1],
+                          const uint8_t table_run[/* n */],
+                          const uint8_t table_level[/* n*/], int n);
+
+/**
+ * Initialize index_run, max_level and max_run from n, last, table_vlc,
+ * table_run and table_level.
+ * @param static_store static uint8_t array[2][2*MAX_RUN + MAX_LEVEL + 3]
+ *                     to hold the level and run tables.
+ * @note  This function does not touch rl_vlc at all, hence there is no need
+ *        to synchronize calls to ff_rl_init() and ff_rl_init_vlc() using the
+ *        same RLTable.
+ */
+void ff_rl_init(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3]);
+
+/**
+ * Initialize rl_vlc from n, last, table_vlc, table_run and table_level.
+ * All rl_vlc pointers to be initialized must already point to a static
+ * buffer of `static_size` RL_VLC_ELEM elements; if a pointer is NULL,
+ * initializing further VLCs stops.
+ * @note  This function does not touch what ff_rl_init() initializes at all,
+ *        hence there is no need to synchronize calls to ff_rl_init() and
+ *        ff_rl_init_vlc() using the same RLTable.
+ */
+void ff_rl_init_vlc(RLTable *rl, unsigned static_size);
+
+#define INIT_VLC_RL(rl, static_size)\
+{\
+    static RL_VLC_ELEM rl_vlc_table[32][static_size];\
+\
+    for (int q = 0; q < 32; q++) \
+        rl.rl_vlc[q] = rl_vlc_table[q]; \
+\
+    ff_rl_init_vlc(&rl, static_size); \
+}
+
+#define INIT_FIRST_VLC_RL(rl, static_size)              \
+do {                                                    \
+    static RL_VLC_ELEM rl_vlc_table[static_size];       \
+                                                        \
+    rl.rl_vlc[0] = rl_vlc_table;                        \
+    ff_rl_init_vlc(&rl, static_size);                   \
+} while (0)
+
+static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
+{
+    int index;
+    index = rl->index_run[last][run];
+    if (index >= rl->n)
+        return rl->n;
+    if (level > rl->max_level[last][run])
+        return rl->n;
+    return index + level - 1;
+}
+
+#endif /* AVCODEC_RL_H */