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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /media/ffvpx/libavcodec/bitstream.c
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'media/ffvpx/libavcodec/bitstream.c')
-rw-r--r--media/ffvpx/libavcodec/bitstream.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/bitstream.c b/media/ffvpx/libavcodec/bitstream.c
new file mode 100644
index 0000000000..3606575055
--- /dev/null
+++ b/media/ffvpx/libavcodec/bitstream.c
@@ -0,0 +1,72 @@
+/*
+ * Common bit i/o utils
+ * Copyright (c) 2000, 2001 Fabrice Bellard
+ * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2010 Loren Merritt
+ *
+ * alternative bitstream reader & writer by Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ * bitstream api.
+ */
+
+#include <stdint.h>
+#include <string.h>
+
+#include "config.h"
+#include "libavutil/avassert.h"
+#include "libavutil/intreadwrite.h"
+#include "put_bits.h"
+
+void ff_put_string(PutBitContext *pb, const char *string, int terminate_string)
+{
+ while (*string) {
+ put_bits(pb, 8, *string);
+ string++;
+ }
+ if (terminate_string)
+ put_bits(pb, 8, 0);
+}
+
+void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length)
+{
+ int words = length >> 4;
+ int bits = length & 15;
+ int i;
+
+ if (length == 0)
+ return;
+
+ av_assert0(length <= put_bits_left(pb));
+
+ if (CONFIG_SMALL || words < 16 || put_bits_count(pb) & 7) {
+ for (i = 0; i < words; i++)
+ put_bits(pb, 16, AV_RB16(src + 2 * i));
+ } else {
+ for (i = 0; put_bits_count(pb) & 31; i++)
+ put_bits(pb, 8, src[i]);
+ flush_put_bits(pb);
+ memcpy(put_bits_ptr(pb), src + i, 2 * words - i);
+ skip_put_bytes(pb, 2 * words - i);
+ }
+
+ put_bits(pb, bits, AV_RB16(src + 2 * words) >> (16 - bits));
+}