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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /media/ffvpx/libavcodec/rl.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'media/ffvpx/libavcodec/rl.h')
-rw-r--r--media/ffvpx/libavcodec/rl.h87
1 files changed, 87 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/rl.h b/media/ffvpx/libavcodec/rl.h
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+/*
+ * 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;
+
+/**
+ * @param static_store static uint8_t array[2][2*MAX_RUN + MAX_LEVEL + 3] which will hold
+ * the level and run tables, if this is NULL av_malloc() will be used
+ */
+int ff_rl_init(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3]);
+void ff_rl_init_vlc(RLTable *rl, unsigned static_size);
+
+/**
+ * Free the contents of a dynamically allocated table.
+ */
+void ff_rl_free(RLTable *rl);
+
+#define INIT_VLC_RL(rl, static_size)\
+{\
+ int q;\
+ static RL_VLC_ELEM rl_vlc_table[32][static_size];\
+\
+ if(!rl.rl_vlc[0]){\
+ for(q=0; q<32; q++)\
+ rl.rl_vlc[q]= rl_vlc_table[q];\
+\
+ ff_rl_init_vlc(&rl, static_size);\
+ }\
+}
+
+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 */