#ifndef AVCODEC_BYTESTREAM_H
#define AVCODEC_BYTESTREAM_H
+#include <stdint.h>
#include <string.h>
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
-typedef struct {
+typedef struct GetByteContext {
const uint8_t *buffer, *buffer_end, *buffer_start;
} GetByteContext;
-typedef struct {
+typedef struct PutByteContext {
uint8_t *buffer, *buffer_end, *buffer_start;
int eof;
} PutByteContext;
-#define DEF_T(type, name, bytes, read, write) \
+#define DEF(type, name, bytes, read, write) \
static av_always_inline type bytestream_get_ ## name(const uint8_t **b) \
{ \
(*b) += bytes; \
} \
static av_always_inline type bytestream2_get_ ## name(GetByteContext *g) \
{ \
- if (g->buffer_end - g->buffer < bytes) \
+ if (g->buffer_end - g->buffer < bytes) { \
+ g->buffer = g->buffer_end; \
return 0; \
+ } \
return bytestream2_get_ ## name ## u(g); \
} \
static av_always_inline type bytestream2_peek_ ## name(GetByteContext *g) \
return read(g->buffer); \
}
-#define DEF(name, bytes, read, write) \
- DEF_T(unsigned int, name, bytes, read, write)
-#define DEF64(name, bytes, read, write) \
- DEF_T(uint64_t, name, bytes, read, write)
-
-DEF64(le64, 8, AV_RL64, AV_WL64)
-DEF (le32, 4, AV_RL32, AV_WL32)
-DEF (le24, 3, AV_RL24, AV_WL24)
-DEF (le16, 2, AV_RL16, AV_WL16)
-DEF64(be64, 8, AV_RB64, AV_WB64)
-DEF (be32, 4, AV_RB32, AV_WB32)
-DEF (be24, 3, AV_RB24, AV_WB24)
-DEF (be16, 2, AV_RB16, AV_WB16)
-DEF (byte, 1, AV_RB8 , AV_WB8 )
-
-#undef DEF
-#undef DEF64
-#undef DEF_T
+DEF(uint64_t, le64, 8, AV_RL64, AV_WL64)
+DEF(unsigned int, le32, 4, AV_RL32, AV_WL32)
+DEF(unsigned int, le24, 3, AV_RL24, AV_WL24)
+DEF(unsigned int, le16, 2, AV_RL16, AV_WL16)
+DEF(uint64_t, be64, 8, AV_RB64, AV_WB64)
+DEF(unsigned int, be32, 4, AV_RB32, AV_WB32)
+DEF(unsigned int, be24, 3, AV_RB24, AV_WB24)
+DEF(unsigned int, be16, 2, AV_RB16, AV_WB16)
+DEF(unsigned int, byte, 1, AV_RB8 , AV_WB8)
#if HAVE_BIGENDIAN
# define bytestream2_get_ne16 bytestream2_get_be16
g->buffer += FFMIN(g->buffer_end - g->buffer, size);
}
+static av_always_inline void bytestream2_skipu(GetByteContext *g,
+ unsigned int size)
+{
+ g->buffer += size;
+}
+
static av_always_inline void bytestream2_skip_p(PutByteContext *p,
unsigned int size)
{
return (int)(p->buffer - p->buffer_start);
}
+static av_always_inline int bytestream2_size(GetByteContext *g)
+{
+ return (int)(g->buffer_end - g->buffer_start);
+}
+
+static av_always_inline int bytestream2_size_p(PutByteContext *p)
+{
+ return (int)(p->buffer_end - p->buffer_start);
+}
+
static av_always_inline int bytestream2_seek(GetByteContext *g,
int offset,
int whence)
return size2;
}
+static av_always_inline unsigned int bytestream2_get_bufferu(GetByteContext *g,
+ uint8_t *dst,
+ unsigned int size)
+{
+ memcpy(dst, g->buffer, size);
+ g->buffer += size;
+ return size;
+}
+
static av_always_inline unsigned int bytestream2_put_buffer(PutByteContext *p,
const uint8_t *src,
unsigned int size)
return size2;
}
+static av_always_inline unsigned int bytestream2_put_bufferu(PutByteContext *p,
+ const uint8_t *src,
+ unsigned int size)
+{
+ memcpy(p->buffer, src, size);
+ p->buffer += size;
+ return size;
+}
+
static av_always_inline void bytestream2_set_buffer(PutByteContext *p,
const uint8_t c,
unsigned int size)
p->buffer += size2;
}
+static av_always_inline void bytestream2_set_bufferu(PutByteContext *p,
+ const uint8_t c,
+ unsigned int size)
+{
+ memset(p->buffer, c, size);
+ p->buffer += size;
+}
+
static av_always_inline unsigned int bytestream2_get_eof(PutByteContext *p)
{
return p->eof;
}
+static av_always_inline unsigned int bytestream2_copy_bufferu(PutByteContext *p,
+ GetByteContext *g,
+ unsigned int size)
+{
+ memcpy(p->buffer, g->buffer, size);
+ p->buffer += size;
+ g->buffer += size;
+ return size;
+}
+
+static av_always_inline unsigned int bytestream2_copy_buffer(PutByteContext *p,
+ GetByteContext *g,
+ unsigned int size)
+{
+ int size2;
+
+ if (p->eof)
+ return 0;
+ size = FFMIN(g->buffer_end - g->buffer, size);
+ size2 = FFMIN(p->buffer_end - p->buffer, size);
+ if (size2 != size)
+ p->eof = 1;
+
+ return bytestream2_copy_bufferu(p, g, size2);
+}
+
static av_always_inline unsigned int bytestream_get_buffer(const uint8_t **b,
uint8_t *dst,
unsigned int size)