//#define LIBMPEG2_BITSTREAM_READER
//#define A32_BITSTREAM_READER
#define LIBMPEG2_BITSTREAM_READER_HACK //add BERO
-
+
extern const uint8_t ff_reverse[256];
#if defined(ARCH_X86) || defined(ARCH_X86_64)
static inline void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
{
+ if(buffer_size < 0) {
+ buffer_size = 0;
+ buffer = NULL;
+ }
+
s->buf = buffer;
s->buf_end = s->buf + buffer_size;
#ifdef ALT_BITSTREAM_WRITER
# ifdef __GNUC__
static inline uint32_t unaligned32(const void *v) {
struct Unaligned {
- uint32_t i;
+ uint32_t i;
} __attribute__((packed));
return ((const struct Unaligned *) v)->i;
#endif
// printf("put_bits=%d %x\n", n, value);
assert(n == 32 || value < (1U << n));
-
+
bit_buf = s->bit_buf;
bit_left = s->bit_left;
bit_buf = (bit_buf<<n) | value;
bit_left-=n;
} else {
- bit_buf<<=bit_left;
+ bit_buf<<=bit_left;
bit_buf |= value >> (n - bit_left);
#ifdef UNALIGNED_STORES_ARE_BAD
if (3 & (intptr_t) s->buf_ptr) {
*(uint32_t *)s->buf_ptr = be2me_32(bit_buf);
//printf("bitbuf = %08x\n", bit_buf);
s->buf_ptr+=4;
- bit_left+=32 - n;
+ bit_left+=32 - n;
bit_buf = value;
}
# ifdef ALIGNED_BITSTREAM_WRITER
# if defined(ARCH_X86) || defined(ARCH_X86_64)
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"
+ "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;
-
+
+ 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);
# else //ALIGNED_BITSTREAM_WRITER
# if defined(ARCH_X86) || defined(ARCH_X86_64)
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"
+ "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);
static inline uint8_t* pbBufPtr(PutBitContext *s)
{
#ifdef ALT_BITSTREAM_WRITER
- return s->buf + (s->index>>3);
+ return s->buf + (s->index>>3);
#else
- return s->buf_ptr;
+ return s->buf_ptr;
#endif
}
assert((put_bits_count(s)&7)==0);
#ifdef ALT_BITSTREAM_WRITER
FIXME may need some cleaning of the buffer
- s->index += n<<3;
+ s->index += n<<3;
#else
assert(s->bit_left==32);
- s->buf_ptr += n;
-#endif
+ s->buf_ptr += n;
+#endif
}
/**
s->bit_left -= n;
s->buf_ptr-= s->bit_left>>5;
s->bit_left &= 31;
-#endif
+#endif
}
/**
static inline int unaligned32_be(const void *v)
{
#ifdef CONFIG_ALIGN
- const uint8_t *p=v;
- return (((p[0]<<8) | p[1])<<16) | (p[2]<<8) | (p[3]);
+ const uint8_t *p=v;
+ return (((p[0]<<8) | p[1])<<16) | (p[2]<<8) | (p[3]);
#else
- return be2me_32( unaligned32(v)); //original
+ return be2me_32( unaligned32(v)); //original
#endif
}
#if defined(ARCH_X86) || defined(ARCH_X86_64)
# define SKIP_CACHE(name, gb, num)\
asm(\
- "shldl %2, %1, %0 \n\t"\
- "shll %2, %1 \n\t"\
+ "shldl %2, %1, %0 \n\t"\
+ "shll %2, %1 \n\t"\
: "+r" (name##_cache0), "+r" (name##_cache1)\
: "Ic" ((uint8_t)num)\
);
/**
* read mpeg1 dc style vlc (sign bit + mantisse with no MSB).
- * if MSB not set it is negative
+ * if MSB not set it is negative
* @param n length in bits
- * @author BERO
+ * @author BERO
*/
static inline int get_xbits(GetBitContext *s, int n){
register int tmp;
static inline void init_get_bits(GetBitContext *s,
const uint8_t *buffer, int bit_size)
{
- const int buffer_size= (bit_size+7)>>3;
+ int buffer_size= (bit_size+7)>>3;
+ if(buffer_size < 0 || bit_size < 0) {
+ buffer_size = bit_size = 0;
+ buffer = NULL;
+ }
s->buffer= buffer;
s->size_in_bits= bit_size;
SKIP_BITS(name, gb, n)\
}
-// deprecated, dont use get_vlc for new code, use get_vlc2 instead or use GET_VLC directly
-static inline int get_vlc(GetBitContext *s, VLC *vlc)
-{
- int code;
- VLC_TYPE (*table)[2]= vlc->table;
-
- OPEN_READER(re, s)
- UPDATE_CACHE(re, s)
-
- GET_VLC(code, re, s, table, vlc->bits, 3)
-
- CLOSE_READER(re, s)
- return code;
-}
/**
* parses a vlc code, faster then get_vlc()
- * @param bits is the number of bits which will be read at once, must be
+ * @param bits is the number of bits which will be read at once, must be
* identical to nb_bits in init_vlc()
* @param max_depth is the number of times bits bits must be readed to completly
- * read the longest vlc code
+ * read the longest vlc code
* = (max_vlc_length + bits - 1) / bits
*/
static always_inline int get_vlc2(GetBitContext *s, VLC_TYPE (*table)[2],
int bits, int max_depth)
{
int code;
-
+
OPEN_READER(re, s)
UPDATE_CACHE(re, s)
#include "avcodec.h"
static inline void print_bin(int bits, int n){
int i;
-
+
for(i=n-1; i>=0; i--){
av_log(NULL, AV_LOG_DEBUG, "%d", (bits>>i)&1);
}
static inline int get_bits_trace(GetBitContext *s, int n, char *file, const char *func, int line){
int r= get_bits(s, n);
-
+
print_bin(r, n);
av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d bit @%5d in %s %s:%d\n", r, n, r, get_bits_count(s)-n, file, func, line);
return r;
int r= get_vlc2(s, table, bits, max_depth);
int len= get_bits_count(s) - pos;
int bits2= show>>(24-len);
-
+
print_bin(bits2, len);
-
+
av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d vlc @%5d in %s %s:%d\n", bits2, len, r, pos, file, func, line);
return r;
}
static inline int get_xbits_trace(GetBitContext *s, int n, char *file, const char *func, int line){
int show= show_bits(s, n);
int r= get_xbits(s, n);
-
+
print_bin(show, n);
av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d xbt @%5d in %s %s:%d\n", show, n, r, get_bits_count(s)-n, file, func, line);
return r;
projects / ffmpeg / blobdiff