diff options
author | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
---|---|---|
committer | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
commit | 726a91b12a7524e45e7a901c9e4883af5b1bffe6 (patch) | |
tree | f5d25e3b2e84c92f4901280c73d5d3d7e6c3cd19 /src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/put_bits.h | |
parent | 02183f6e47ad4ea1057de9950482f291f2ae4290 (diff) |
Rename several directories to use MixedCase instead of lowercase.
They now mostly match the case used in #includes,
and they're consistent with the names of the .h files they contain.
git-svn-id: https://mpc-hc.svn.sourceforge.net/svnroot/mpc-hc/trunk@1648 10f7b99b-c216-0410-bff0-8a66a9350fd8
Diffstat (limited to 'src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/put_bits.h')
-rw-r--r-- | src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/put_bits.h | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/put_bits.h b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/put_bits.h new file mode 100644 index 000000000..c02027857 --- /dev/null +++ b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/put_bits.h @@ -0,0 +1,343 @@ +/*
+ * copyright (c) 2004 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 libavcodec/put_bits.h
+ * bitstream writer API
+ */
+
+#ifndef AVCODEC_PUT_BITS_H
+#define AVCODEC_PUT_BITS_H
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <assert.h>
+#include "libavutil/bswap.h"
+#include "libavutil/common.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/log.h"
+#include "mathops.h"
+
+//#define ALT_BITSTREAM_WRITER
+//#define ALIGNED_BITSTREAM_WRITER
+
+/* buf and buf_end must be present and used by every alternative writer. */
+typedef struct PutBitContext {
+#ifdef ALT_BITSTREAM_WRITER
+ uint8_t *buf, *buf_end;
+ int index;
+#else
+ uint32_t bit_buf;
+ int bit_left;
+ uint8_t *buf, *buf_ptr, *buf_end;
+#endif
+ int size_in_bits;
+} PutBitContext;
+
+/**
+ * Initializes the PutBitContext s.
+ *
+ * @param buffer the buffer where to put bits
+ * @param buffer_size the size in bytes of buffer
+ */
+static inline void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
+{
+ if(buffer_size < 0) {
+ buffer_size = 0;
+ buffer = NULL;
+ }
+
+ s->size_in_bits= 8*buffer_size;
+ s->buf = buffer;
+ s->buf_end = s->buf + buffer_size;
+#ifdef ALT_BITSTREAM_WRITER
+ s->index=0;
+ ((uint32_t*)(s->buf))[0]=0;
+// memset(buffer, 0, buffer_size);
+#else
+ s->buf_ptr = s->buf;
+ s->bit_left=32;
+ s->bit_buf=0;
+#endif
+}
+
+/**
+ * Returns the total number of bits written to the bitstream.
+ */
+static inline int put_bits_count(PutBitContext *s)
+{
+#ifdef ALT_BITSTREAM_WRITER
+ return s->index;
+#else
+ return (s->buf_ptr - s->buf) * 8 + 32 - s->bit_left;
+#endif
+}
+
+/**
+ * Pads the end of the output stream with zeros.
+ */
+static inline void flush_put_bits(PutBitContext *s)
+{
+#ifdef ALT_BITSTREAM_WRITER
+ align_put_bits(s);
+#else
+#ifndef BITSTREAM_WRITER_LE
+ s->bit_buf<<= s->bit_left;
+#endif
+ while (s->bit_left < 32) {
+ /* XXX: should test end of buffer */
+#ifdef BITSTREAM_WRITER_LE
+ *s->buf_ptr++=s->bit_buf;
+ s->bit_buf>>=8;
+#else
+ *s->buf_ptr++=s->bit_buf >> 24;
+ s->bit_buf<<=8;
+#endif
+ s->bit_left+=8;
+ }
+ s->bit_left=32;
+ s->bit_buf=0;
+#endif
+}
+
+#if defined(ALT_BITSTREAM_WRITER) || defined(BITSTREAM_WRITER_LE)
+#define align_put_bits align_put_bits_unsupported_here
+#define ff_put_string ff_put_string_unsupported_here
+#define ff_copy_bits ff_copy_bits_unsupported_here
+#else
+/**
+ * Pads the bitstream with zeros up to the next byte boundary.
+ */
+void align_put_bits(PutBitContext *s);
+
+/**
+ * Puts the string string in the bitstream.
+ *
+ * @param terminate_string 0-terminates the written string if value is 1
+ */
+void ff_put_string(PutBitContext *pb, const char *string, int terminate_string);
+
+/**
+ * Copies the content of src to the bitstream.
+ *
+ * @param length the number of bits of src to copy
+ */
+void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length);
+#endif
+
+/**
+ * Writes up to 31 bits into a bitstream.
+ * Use put_bits32 to write 32 bits.
+ */
+static inline void put_bits(PutBitContext *s, int n, unsigned int value)
+#ifndef ALT_BITSTREAM_WRITER
+{
+ unsigned int bit_buf;
+ int bit_left;
+
+ // printf("put_bits=%d %x\n", n, value);
+ assert(n <= 31 && value < (1U << n));
+
+ bit_buf = s->bit_buf;
+ bit_left = s->bit_left;
+
+ // printf("n=%d value=%x cnt=%d buf=%x\n", n, value, bit_cnt, bit_buf);
+ /* XXX: optimize */
+#ifdef BITSTREAM_WRITER_LE
+ bit_buf |= value << (32 - bit_left);
+ if (n >= bit_left) {
+#if !HAVE_FAST_UNALIGNED
+ if (3 & (intptr_t) s->buf_ptr) {
+ AV_WL32(s->buf_ptr, bit_buf);
+ } else
+#endif
+ *(uint32_t *)s->buf_ptr = le2me_32(bit_buf);
+ s->buf_ptr+=4;
+ bit_buf = (bit_left==32)?0:value >> bit_left;
+ bit_left+=32;
+ }
+ bit_left-=n;
+#else
+ if (n < bit_left) {
+ bit_buf = (bit_buf<<n) | value;
+ bit_left-=n;
+ } else {
+ bit_buf<<=bit_left;
+ bit_buf |= value >> (n - bit_left);
+#if !HAVE_FAST_UNALIGNED
+ if (3 & (intptr_t) s->buf_ptr) {
+ AV_WB32(s->buf_ptr, bit_buf);
+ } else
+#endif
+ *(uint32_t *)s->buf_ptr = be2me_32(bit_buf);
+ //printf("bitbuf = %08x\n", bit_buf);
+ s->buf_ptr+=4;
+ bit_left+=32 - n;
+ bit_buf = value;
+ }
+#endif
+
+ s->bit_buf = bit_buf;
+ s->bit_left = bit_left;
+}
+#else /* ALT_BITSTREAM_WRITER defined */
+{
+# ifdef ALIGNED_BITSTREAM_WRITER
+# if ARCH_X86
+ __asm__ volatile(
+ "movl %0, %%ecx \n\t"
+ "xorl %%eax, %%eax \n\t"
+ "shrdl %%cl, %1, %%eax \n\t"
+ "shrl %%cl, %1 \n\t"
+ "movl %0, %%ecx \n\t"
+ "shrl $3, %%ecx \n\t"
+ "andl $0xFFFFFFFC, %%ecx \n\t"
+ "bswapl %1 \n\t"
+ "orl %1, (%2, %%ecx) \n\t"
+ "bswapl %%eax \n\t"
+ "addl %3, %0 \n\t"
+ "movl %%eax, 4(%2, %%ecx) \n\t"
+ : "=&r" (s->index), "=&r" (value)
+ : "r" (s->buf), "r" (n), "0" (s->index), "1" (value<<(-n))
+ : "%eax", "%ecx"
+ );
+# else
+ int index= s->index;
+ uint32_t *ptr= ((uint32_t *)s->buf)+(index>>5);
+
+ value<<= 32-n;
+
+ ptr[0] |= be2me_32(value>>(index&31));
+ ptr[1] = be2me_32(value<<(32-(index&31)));
+//if(n>24) printf("%d %d\n", n, value);
+ index+= n;
+ s->index= index;
+# endif
+# else //ALIGNED_BITSTREAM_WRITER
+# if ARCH_X86
+ __asm__ volatile(
+ "movl $7, %%ecx \n\t"
+ "andl %0, %%ecx \n\t"
+ "addl %3, %%ecx \n\t"
+ "negl %%ecx \n\t"
+ "shll %%cl, %1 \n\t"
+ "bswapl %1 \n\t"
+ "movl %0, %%ecx \n\t"
+ "shrl $3, %%ecx \n\t"
+ "orl %1, (%%ecx, %2) \n\t"
+ "addl %3, %0 \n\t"
+ "movl $0, 4(%%ecx, %2) \n\t"
+ : "=&r" (s->index), "=&r" (value)
+ : "r" (s->buf), "r" (n), "0" (s->index), "1" (value)
+ : "%ecx"
+ );
+# else
+ int index= s->index;
+ uint32_t *ptr= (uint32_t*)(((uint8_t *)s->buf)+(index>>3));
+
+ ptr[0] |= be2me_32(value<<(32-n-(index&7) ));
+ ptr[1] = 0;
+//if(n>24) printf("%d %d\n", n, value);
+ index+= n;
+ s->index= index;
+# endif
+# endif //!ALIGNED_BITSTREAM_WRITER
+}
+#endif
+
+static inline void put_sbits(PutBitContext *pb, int n, int32_t value)
+{
+ assert(n >= 0 && n <= 31);
+
+ put_bits(pb, n, value & ((1<<n)-1));
+}
+
+/**
+ * Writes exactly 32 bits into a bitstream.
+ */
+static void av_unused put_bits32(PutBitContext *s, uint32_t value)
+{
+ int lo = value & 0xffff;
+ int hi = value >> 16;
+#ifdef BITSTREAM_WRITER_LE
+ put_bits(s, 16, lo);
+ put_bits(s, 16, hi);
+#else
+ put_bits(s, 16, hi);
+ put_bits(s, 16, lo);
+#endif
+}
+
+/**
+ * Returns the pointer to the byte where the bitstream writer will put
+ * the next bit.
+ */
+static inline uint8_t* put_bits_ptr(PutBitContext *s)
+{
+#ifdef ALT_BITSTREAM_WRITER
+ return s->buf + (s->index>>3);
+#else
+ return s->buf_ptr;
+#endif
+}
+
+/**
+ * Skips the given number of bytes.
+ * PutBitContext must be flushed & aligned to a byte boundary before calling this.
+ */
+static inline void skip_put_bytes(PutBitContext *s, int n)
+{
+ assert((put_bits_count(s)&7)==0);
+#ifdef ALT_BITSTREAM_WRITER
+ FIXME may need some cleaning of the buffer
+ s->index += n<<3;
+#else
+ assert(s->bit_left==32);
+ s->buf_ptr += n;
+#endif
+}
+
+/**
+ * Skips the given number of bits.
+ * Must only be used if the actual values in the bitstream do not matter.
+ * If n is 0 the behavior is undefined.
+ */
+static inline void skip_put_bits(PutBitContext *s, int n)
+{
+#ifdef ALT_BITSTREAM_WRITER
+ s->index += n;
+#else
+ s->bit_left -= n;
+ s->buf_ptr-= 4*(s->bit_left>>5);
+ s->bit_left &= 31;
+#endif
+}
+
+/**
+ * Changes the end of the buffer.
+ *
+ * @param size the new size in bytes of the buffer where to put bits
+ */
+static inline void set_put_bits_buffer_size(PutBitContext *s, int size)
+{
+ s->buf_end= s->buf + size;
+}
+
+#endif /* AVCODEC_PUT_BITS_H */
|