23 #ifndef AVCODEC_BYTESTREAM_H
24 #define AVCODEC_BYTESTREAM_H
42 #define DEF(type, name, bytes, read, write) \
43 static av_always_inline type bytestream_get_ ## name(const uint8_t **b) \
46 return read(*b - bytes); \
48 static av_always_inline void bytestream_put_ ## name(uint8_t **b, \
54 static av_always_inline void bytestream2_put_ ## name ## u(PutByteContext *p, \
57 bytestream_put_ ## name(&p->buffer, value); \
59 static av_always_inline void bytestream2_put_ ## name(PutByteContext *p, \
62 if (!p->eof && (p->buffer_end - p->buffer >= bytes)) { \
63 write(p->buffer, value); \
68 static av_always_inline type bytestream2_get_ ## name ## u(GetByteContext *g) \
70 return bytestream_get_ ## name(&g->buffer); \
72 static av_always_inline type bytestream2_get_ ## name(GetByteContext *g) \
74 if (g->buffer_end - g->buffer < bytes) { \
75 g->buffer = g->buffer_end; \
78 return bytestream2_get_ ## name ## u(g); \
80 static av_always_inline type bytestream2_peek_ ## name ## u(GetByteContext *g) \
82 return read(g->buffer); \
84 static av_always_inline type bytestream2_peek_ ## name(GetByteContext *g) \
86 if (g->buffer_end - g->buffer < bytes) \
88 return bytestream2_peek_ ## name ## u(g); \
101 #if AV_HAVE_BIGENDIAN
102 # define bytestream2_get_ne16 bytestream2_get_be16
103 # define bytestream2_get_ne24 bytestream2_get_be24
104 # define bytestream2_get_ne32 bytestream2_get_be32
105 # define bytestream2_get_ne64 bytestream2_get_be64
106 # define bytestream2_get_ne16u bytestream2_get_be16u
107 # define bytestream2_get_ne24u bytestream2_get_be24u
108 # define bytestream2_get_ne32u bytestream2_get_be32u
109 # define bytestream2_get_ne64u bytestream2_get_be64u
110 # define bytestream2_put_ne16 bytestream2_put_be16
111 # define bytestream2_put_ne24 bytestream2_put_be24
112 # define bytestream2_put_ne32 bytestream2_put_be32
113 # define bytestream2_put_ne64 bytestream2_put_be64
114 # define bytestream2_peek_ne16 bytestream2_peek_be16
115 # define bytestream2_peek_ne24 bytestream2_peek_be24
116 # define bytestream2_peek_ne32 bytestream2_peek_be32
117 # define bytestream2_peek_ne64 bytestream2_peek_be64
119 # define bytestream2_get_ne16 bytestream2_get_le16
120 # define bytestream2_get_ne24 bytestream2_get_le24
121 # define bytestream2_get_ne32 bytestream2_get_le32
122 # define bytestream2_get_ne64 bytestream2_get_le64
123 # define bytestream2_get_ne16u bytestream2_get_le16u
124 # define bytestream2_get_ne24u bytestream2_get_le24u
125 # define bytestream2_get_ne32u bytestream2_get_le32u
126 # define bytestream2_get_ne64u bytestream2_get_le64u
127 # define bytestream2_put_ne16 bytestream2_put_le16
128 # define bytestream2_put_ne24 bytestream2_put_le24
129 # define bytestream2_put_ne32 bytestream2_put_le32
130 # define bytestream2_put_ne64 bytestream2_put_le64
131 # define bytestream2_peek_ne16 bytestream2_peek_le16
132 # define bytestream2_peek_ne24 bytestream2_peek_le24
133 # define bytestream2_peek_ne32 bytestream2_peek_le32
134 # define bytestream2_peek_ne64 bytestream2_peek_le64
143 g->buffer_start = buf;
144 g->buffer_end = buf + buf_size;
160 return g->buffer_end -
g->buffer;
194 return (
int)(
g->buffer -
g->buffer_start);
204 return (
int)(
g->buffer_end -
g->buffer_start);
219 g->buffer_end -
g->buffer);
228 g->buffer =
g->buffer_start +
offset;
271 int size2 =
FFMIN(
g->buffer_end -
g->buffer,
size);
272 memcpy(dst,
g->buffer, size2);
281 memcpy(dst,
g->buffer,
size);
367 memcpy(dst, *
b,
size);
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert0(cond)
assert() equivalent, that is always enabled.
static av_always_inline void bytestream2_set_bufferu(PutByteContext *p, const uint8_t c, unsigned int size)
#define DEF(type, name, bytes, read, write)
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
static av_always_inline unsigned int bytestream_get_buffer(const uint8_t **b, uint8_t *dst, unsigned int size)
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
static av_always_inline void bytestream2_init_writer(PutByteContext *p, uint8_t *buf, int buf_size)
static av_always_inline int bytestream2_size(GetByteContext *g)
static av_always_inline int bytestream2_tell_p(PutByteContext *p)
static av_always_inline int bytestream2_size_p(PutByteContext *p)
static av_always_inline void bytestream2_skip_p(PutByteContext *p, unsigned int size)
static av_always_inline void bytestream2_skipu(GetByteContext *g, unsigned int size)
static av_always_inline int bytestream2_get_bytes_left_p(PutByteContext *p)
static av_always_inline unsigned int bytestream2_get_bufferu(GetByteContext *g, uint8_t *dst, unsigned int size)
static av_always_inline unsigned int bytestream2_copy_buffer(PutByteContext *p, GetByteContext *g, unsigned int size)
static av_always_inline unsigned int bytestream2_copy_bufferu(PutByteContext *p, GetByteContext *g, unsigned int size)
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
static av_always_inline unsigned int bytestream2_put_bufferu(PutByteContext *p, const uint8_t *src, unsigned int size)
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
static av_always_inline int bytestream2_seek_p(PutByteContext *p, int offset, int whence)
static av_always_inline int bytestream2_tell(GetByteContext *g)
static av_always_inline unsigned int bytestream2_get_eof(PutByteContext *p)
static av_always_inline void bytestream2_set_buffer(PutByteContext *p, const uint8_t c, unsigned int size)
static av_always_inline unsigned int bytestream2_put_buffer(PutByteContext *p, const uint8_t *src, unsigned int size)
common internal and external API header
const uint8_t * buffer_end
const uint8_t * buffer_start
static const uint8_t offset[127][2]