Adding upstream version 110.0.1.upstream/110.0.1upstream

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

1 files changed, 144 insertions, 0 deletions

diff --git a/media/ffvpx/libavcodec/vlc.h b/media/ffvpx/libavcodec/vlc.h
new file mode 100644
index 0000000000..e63c484755
--- /dev/null
+++ b/media/ffvpx/libavcodec/vlc.h
@@ -0,0 +1,144 @@
+/*
+ * 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_VLC_H
+#define AVCODEC_VLC_H
+
+#include <stdint.h>
+
+// When changing this, be sure to also update tableprint_vlc.h accordingly.
+typedef int16_t VLCBaseType;
+
+typedef struct VLCElem {
+    VLCBaseType sym, len;
+} VLCElem;
+
+typedef struct VLC {
+    int bits;
+    VLCElem *table;
+    int table_size, table_allocated;
+} VLC;
+
+typedef struct RL_VLC_ELEM {
+    int16_t level;
+    int8_t len;
+    uint8_t run;
+} RL_VLC_ELEM;
+
+#define init_vlc(vlc, nb_bits, nb_codes,                \
+                 bits, bits_wrap, bits_size,            \
+                 codes, codes_wrap, codes_size,         \
+                 flags)                                 \
+    ff_init_vlc_sparse(vlc, nb_bits, nb_codes,          \
+                       bits, bits_wrap, bits_size,      \
+                       codes, codes_wrap, codes_size,   \
+                       NULL, 0, 0, flags)
+
+int ff_init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
+                       const void *bits, int bits_wrap, int bits_size,
+                       const void *codes, int codes_wrap, int codes_size,
+                       const void *symbols, int symbols_wrap, int symbols_size,
+                       int flags);
+
+/**
+ * Build VLC decoding tables suitable for use with get_vlc2()
+ *
+ * This function takes lengths and symbols and calculates the codes from them.
+ * For this the input lengths and symbols have to be sorted according to "left
+ * nodes in the corresponding tree first".
+ *
+ * @param[in,out] vlc      The VLC to be initialized; table and table_allocated
+ *                         must have been set when initializing a static VLC,
+ *                         otherwise this will be treated as uninitialized.
+ * @param[in] nb_bits      The number of bits to use for the VLC table;
+ *                         higher values take up more memory and cache, but
+ *                         allow to read codes with fewer reads.
+ * @param[in] nb_codes     The number of provided length and (if supplied) symbol
+ *                         entries.
+ * @param[in] lens         The lengths of the codes. Entries > 0 correspond to
+ *                         valid codes; entries == 0 will be skipped and entries
+ *                         with len < 0 indicate that the tree is incomplete and
+ *                         has an open end of length -len at this position.
+ * @param[in] lens_wrap    Stride (in bytes) of the lengths.
+ * @param[in] symbols      The symbols, i.e. what is returned from get_vlc2()
+ *                         when the corresponding code is encountered.
+ *                         May be NULL, then 0, 1, 2, 3, 4,... will be used.
+ * @param[in] symbols_wrap Stride (in bytes) of the symbols.
+ * @param[in] symbols_size Size of the symbols. 1 and 2 are supported.
+ * @param[in] offset       An offset to apply to all the valid symbols.
+ * @param[in] flags        A combination of the INIT_VLC_* flags; notice that
+ *                         INIT_VLC_INPUT_LE is pointless and ignored.
+ */
+int ff_init_vlc_from_lengths(VLC *vlc, int nb_bits, int nb_codes,
+                             const int8_t *lens, int lens_wrap,
+                             const void *symbols, int symbols_wrap, int symbols_size,
+                             int offset, int flags, void *logctx);
+
+void ff_free_vlc(VLC *vlc);
+
+/* If INIT_VLC_INPUT_LE is set, the LSB bit of the codes used to
+ * initialize the VLC table is the first bit to be read. */
+#define INIT_VLC_INPUT_LE       2
+/* If set the VLC is intended for a little endian bitstream reader. */
+#define INIT_VLC_OUTPUT_LE      8
+#define INIT_VLC_LE             (INIT_VLC_INPUT_LE | INIT_VLC_OUTPUT_LE)
+#define INIT_VLC_USE_NEW_STATIC 4
+#define INIT_VLC_STATIC_OVERLONG (1 | INIT_VLC_USE_NEW_STATIC)
+
+#define INIT_CUSTOM_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g,      \
+                                      h, i, j, flags, static_size)         \
+    do {                                                                   \
+        static VLCElem table[static_size];                                 \
+        (vlc)->table           = table;                                    \
+        (vlc)->table_allocated = static_size;                              \
+        ff_init_vlc_sparse(vlc, bits, a, b, c, d, e, f, g, h, i, j,        \
+                           flags | INIT_VLC_USE_NEW_STATIC);               \
+    } while (0)
+
+#define INIT_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, h, i, j, static_size) \
+    INIT_CUSTOM_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g,          \
+                                  h, i, j, 0, static_size)
+
+#define INIT_LE_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, h, i, j, static_size) \
+    INIT_CUSTOM_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g,          \
+                                  h, i, j, INIT_VLC_LE, static_size)
+
+#define INIT_CUSTOM_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, flags, static_size) \
+    INIT_CUSTOM_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g,          \
+                                  NULL, 0, 0, flags, static_size)
+
+#define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size)       \
+    INIT_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, NULL, 0, 0, static_size)
+
+#define INIT_LE_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size) \
+    INIT_LE_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, NULL, 0, 0, static_size)
+
+#define INIT_VLC_STATIC_FROM_LENGTHS(vlc, bits, nb_codes, lens, len_wrap,  \
+                                     symbols, symbols_wrap, symbols_size,  \
+                                     offset, flags, static_size)           \
+    do {                                                                   \
+        static VLCElem table[static_size];                                 \
+        (vlc)->table           = table;                                    \
+        (vlc)->table_allocated = static_size;                              \
+        ff_init_vlc_from_lengths(vlc, bits, nb_codes, lens, len_wrap,      \
+                                 symbols, symbols_wrap, symbols_size,      \
+                                 offset, flags | INIT_VLC_USE_NEW_STATIC,  \
+                                 NULL);                                    \
+    } while (0)
+
+#endif /* AVCODEC_VLC_H */