#include "libavutil/intreadwrite.h"
#include "libavutil/avassert.h"
+#include "version.h"
+
#if ARCH_X86_64
// TODO: Benchmark and optionally enable on other 64-bit architectures.
typedef uint64_t BitBuf;
BitBuf bit_buf;
int bit_left;
uint8_t *buf, *buf_ptr, *buf_end;
+#if LIBAVCODEC_VERSION_MAJOR < 59
int size_in_bits;
+#endif
} PutBitContext;
/**
buffer = NULL;
}
- s->size_in_bits = 8 * buffer_size;
s->buf = buffer;
s->buf_end = s->buf + buffer_size;
s->buf_ptr = s->buf;
return (s->buf_ptr - s->buf) * 8 + BUF_BITS - s->bit_left;
}
+/**
+ * @return the number of bytes output so far; may only be called
+ * when the PutBitContext is freshly initialized or flushed.
+ */
+static inline int put_bytes_output(const PutBitContext *s)
+{
+ av_assert2(s->bit_left == BUF_BITS);
+ return s->buf_ptr - s->buf;
+}
+
+/**
+ * @param round_up When set, the number of bits written so far will be
+ * rounded up to the next byte.
+ * @return the number of bytes output so far.
+ */
+static inline int put_bytes_count(const PutBitContext *s, int round_up)
+{
+ return s->buf_ptr - s->buf + ((BUF_BITS - s->bit_left + (round_up ? 7 : 0)) >> 3);
+}
+
/**
* Rebase the bit writer onto a reallocated buffer.
*
s->buf_end = buffer + buffer_size;
s->buf_ptr = buffer + (s->buf_ptr - s->buf);
s->buf = buffer;
- s->size_in_bits = 8 * buffer_size;
}
/**
return (s->buf_end - s->buf_ptr) * 8 - BUF_BITS + s->bit_left;
}
+/**
+ * @param round_up When set, the number of bits written will be
+ * rounded up to the next byte.
+ * @return the number of bytes left.
+ */
+static inline int put_bytes_left(const PutBitContext *s, int round_up)
+{
+ return s->buf_end - s->buf_ptr - ((BUF_BITS - s->bit_left + (round_up ? 7 : 0)) >> 3);
+}
+
/**
* Pad the end of the output stream with zeros.
*/
s->bit_buf = 0;
}
+#if FF_API_AVPRIV_PUT_BITS
+void avpriv_align_put_bits(PutBitContext *s);
+void avpriv_copy_bits(PutBitContext *pb, const uint8_t *src, int length);
+#endif
+
#ifdef BITSTREAM_WRITER_LE
-#define avpriv_align_put_bits align_put_bits_unsupported_here
-#define avpriv_put_string ff_put_string_unsupported_here
-#define avpriv_copy_bits avpriv_copy_bits_unsupported_here
+#define ff_put_string ff_put_string_unsupported_here
+#define ff_copy_bits ff_copy_bits_unsupported_here
#else
-/**
- * Pad the bitstream with zeros up to the next byte boundary.
- */
-void avpriv_align_put_bits(PutBitContext *s);
/**
* Put the string string in the bitstream.
*
* @param terminate_string 0-terminates the written string if value is 1
*/
-void avpriv_put_string(PutBitContext *pb, const char *string,
+void ff_put_string(PutBitContext *pb, const char *string,
int terminate_string);
/**
*
* @param length the number of bits of src to copy
*/
-void avpriv_copy_bits(PutBitContext *pb, const uint8_t *src, int length);
+void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length);
#endif
static inline void put_bits_no_assert(PutBitContext *s, int n, BitBuf value)
{
av_assert0(size <= INT_MAX/8 - BUF_BITS);
s->buf_end = s->buf + size;
- s->size_in_bits = 8*size;
+}
+
+/**
+ * Pad the bitstream with zeros up to the next byte boundary.
+ */
+static inline void align_put_bits(PutBitContext *s)
+{
+ put_bits(s, s->bit_left & 7, 0);
}
#undef AV_WBBUF