gst_bit_reader_peek_bits_uint64
gst_bit_reader_peek_bits_uint8
+gst_bit_reader_skip_unchecked
+gst_bit_reader_skip_to_byte_unchecked
+
+gst_bit_reader_get_bits_uint16_unchecked
+gst_bit_reader_get_bits_uint32_unchecked
+gst_bit_reader_get_bits_uint64_unchecked
+gst_bit_reader_get_bits_uint8_unchecked
+
+gst_bit_reader_peek_bits_uint16_unchecked
+gst_bit_reader_peek_bits_uint32_unchecked
+gst_bit_reader_peek_bits_uint64_unchecked
+gst_bit_reader_peek_bits_uint8_unchecked
+
<SUBSECTION Private>
GST_BIT_READER
</SECTION>
gstdataqueue.h
noinst_HEADERS = \
- gstbytereader-docs.h
+ gstbytereader-docs.h \
+ gstbitreader-docs.h
CLEANFILES = *.gcno *.gcda *.gcov
--- /dev/null
+/* GStreamer bit reader dummy header for gtk-doc
+ * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/* This header is not installed, it just contains stuff for gtk-doc to parse,
+ * in particular docs and some dummy function declarations for the static
+ * inline functions we generate via macros in gstbitreader.h.
+ */
+
+#error "This header should never be included in code, it is only for gtk-doc"
+
+/**
+ * gst_bit_reader_skip_unchecked:
+ * @reader: a #GstBitReader instance
+ * @nbits: the number of bits to skip
+ *
+ * Skips @nbits bits of the #GstBitReader instance without checking if there
+ * are enough bits available in the bit reader.
+ *
+ * Returns: %TRUE if @nbits bits could be skipped, %FALSE otherwise.
+ *
+ * Since: 0.10.31
+ */
+void gst_bit_reader_skip_unchecked (GstBitReader * reader, guint nbits);
+
+/**
+ * gst_bit_reader_skip_to_byte_unchecked:
+ * @reader: a #GstBitReader instance
+ *
+ * Skips until the next byte without checking if there are enough bits
+ * available in the bit reader.
+ *
+ * Returns: %TRUE if successful, %FALSE otherwise.
+ *
+ * Since: 0.10.31
+ */
+void gst_bit_reader_skip_to_byte_unchecked (GstBitReader * reader);
+
+/**
+ * gst_bit_reader_get_bits_uint8_unchecked:
+ * @reader: a #GstBitReader instance
+ * @nbits: number of bits to read
+ *
+ * Read @nbits bits into @val and update the current position without
+ * checking if there are enough bits available in the bit reader.
+ *
+ * Returns: unsigned 8 bit integer with the bits.
+ *
+ * Since: 0.10.31
+ */
+guint8 gst_bit_reader_peek_bits_uint8_unchecked (const GstBitReader *reader, guint nbits);
+
+/**
+ * gst_bit_reader_peek_bits_uint8_unchecked:
+ * @reader: a #GstBitReader instance
+ * @nbits: number of bits to read
+ *
+ * Read @nbits bits into @val but keep the current position without
+ * checking if there are enough bits available in the bit reader
+ *
+ * Returns: unsigned 8 bit integer with the bits.
+ *
+ * Since: 0.10.31
+ */
+guint8 gst_bit_reader_get_bits_uint8_unchecked (GstBitReader *reader, guint nbits);
+
+/**
+ * gst_bit_reader_get_bits_uint16_unchecked:
+ * @reader: a #GstBitReader instance
+ * @nbits: number of bits to read
+ *
+ * Read @nbits bits into @val and update the current position without
+ * checking if there are enough bits available in the bit reader.
+ *
+ * Returns: unsigned 16 bit integer with the bits.
+ *
+ * Since: 0.10.31
+ */
+guint16 gst_bit_reader_peek_bits_uint16_unchecked (const GstBitReader *reader, guint nbits);
+
+/**
+ * gst_bit_reader_peek_bits_uint16_unchecked:
+ * @reader: a #GstBitReader instance
+ * @nbits: number of bits to read
+ *
+ * Read @nbits bits into @val but keep the current position without
+ * checking if there are enough bits available in the bit reader
+ *
+ * Returns: unsigned 16 bit integer with the bits.
+ *
+ * Since: 0.10.31
+ */
+guint16 gst_bit_reader_get_bits_uint16_unchecked (GstBitReader *reader, guint nbits);
+
+/**
+ * gst_bit_reader_get_bits_uint32_unchecked:
+ * @reader: a #GstBitReader instance
+ * @nbits: number of bits to read
+ *
+ * Read @nbits bits into @val and update the current position without
+ * checking if there are enough bits available in the bit reader.
+ *
+ * Returns: unsigned 32 bit integer with the bits.
+ *
+ * Since: 0.10.31
+ */
+guint32 gst_bit_reader_peek_bits_uint32_unchecked (const GstBitReader *reader, guint nbits);
+
+/**
+ * gst_bit_reader_peek_bits_uint32_unchecked:
+ * @reader: a #GstBitReader instance
+ * @nbits: number of bits to read
+ *
+ * Read @nbits bits into @val but keep the current position without
+ * checking if there are enough bits available in the bit reader
+ *
+ * Returns: unsigned 32 bit integer with the bits.
+ *
+ * Since: 0.10.31
+ */
+guint32 gst_bit_reader_get_bits_uint32_unchecked (GstBitReader *reader, guint nbits);
+
+/**
+ * gst_bit_reader_get_bits_uint64_unchecked:
+ * @reader: a #GstBitReader instance
+ * @nbits: number of bits to read
+ *
+ * Read @nbits bits into @val and update the current position without
+ * checking if there are enough bits available in the bit reader.
+ *
+ * Returns: unsigned 64 bit integer with the bits.
+ *
+ * Since: 0.10.31
+ */
+guint64 gst_bit_reader_peek_bits_uint64_unchecked (const GstBitReader *reader, guint nbits);
+
+/**
+ * gst_bit_reader_peek_bits_uint16_unchecked:
+ * @reader: a #GstBitReader instance
+ * @nbits: number of bits to read
+ *
+ * Read @nbits bits into @val but keep the current position without
+ * checking if there are enough bits available in the bit reader
+ *
+ * Returns: unsigned 64 bit integer with the bits.
+ *
+ * Since: 0.10.31
+ */
+guint64 gst_bit_reader_get_bits_uint64_unchecked (GstBitReader *reader, guint nbits);
+
#include "config.h"
#endif
+#define GST_BIT_READER_DISABLE_INLINES
#include "gstbitreader.h"
#include <string.h>
guint
gst_bit_reader_get_pos (const GstBitReader * reader)
{
- g_return_val_if_fail (reader != NULL, 0);
-
- return reader->byte * 8 + reader->bit;
+ return _gst_bit_reader_get_pos_inline (reader);
}
/**
guint
gst_bit_reader_get_remaining (const GstBitReader * reader)
{
- g_return_val_if_fail (reader != NULL, 0);
-
- return reader->size * 8 - (reader->byte * 8 + reader->bit);
+ return _gst_bit_reader_get_remaining_inline (reader);
}
/**
guint
gst_bit_reader_get_size (const GstBitReader * reader)
{
- g_return_val_if_fail (reader != NULL, 0);
-
- return reader->size * 8;
+ return _gst_bit_reader_get_size_inline (reader);
}
/**
gboolean
gst_bit_reader_skip (GstBitReader * reader, guint nbits)
{
- g_return_val_if_fail (reader != NULL, FALSE);
-
- if (gst_bit_reader_get_remaining (reader) < nbits)
- return FALSE;
-
- reader->bit += nbits;
- reader->byte += reader->bit / 8;
- reader->bit = reader->bit % 8;
-
- return TRUE;
+ return _gst_bit_reader_skip_inline (reader, nbits);
}
/**
gboolean
gst_bit_reader_skip_to_byte (GstBitReader * reader)
{
- g_return_val_if_fail (reader != NULL, FALSE);
-
- if (reader->byte > reader->size)
- return FALSE;
-
- if (reader->bit) {
- reader->bit = 0;
- reader->byte++;
- }
-
- return TRUE;
+ return _gst_bit_reader_skip_to_byte_inline (reader);
}
/**
gboolean \
gst_bit_reader_peek_bits_uint##bits (const GstBitReader *reader, guint##bits *val, guint nbits) \
{ \
- guint##bits ret = 0; \
- const guint8 *data; \
- guint byte, bit; \
- \
- g_return_val_if_fail (reader != NULL, FALSE); \
- g_return_val_if_fail (val != NULL, FALSE); \
- g_return_val_if_fail (nbits <= bits, FALSE); \
- \
- data = reader->data; \
- byte = reader->byte; \
- bit = reader->bit; \
- \
- if (byte * 8 + bit + nbits > reader->size * 8) \
- return FALSE; \
- \
- while (nbits > 0) { \
- guint toread = MIN (nbits, 8 - bit); \
- \
- ret <<= toread; \
- ret |= (data[byte] & (0xff >> bit)) >> (8 - toread - bit); \
- \
- bit += toread; \
- if (bit >= 8) { \
- byte++; \
- bit = 0; \
- } \
- nbits -= toread; \
- } \
- \
- *val = ret; \
- return TRUE; \
+ return _gst_bit_reader_peek_bits_uint##bits##_inline (reader, val, nbits); \
} \
\
gboolean \
gst_bit_reader_get_bits_uint##bits (GstBitReader *reader, guint##bits *val, guint nbits) \
{ \
- gboolean ret; \
- \
- ret = gst_bit_reader_peek_bits_uint##bits (reader, val, nbits); \
- \
- if (ret) { \
- reader->bit += nbits; \
- if (reader->bit >= 8) { \
- reader->byte += reader->bit / 8; \
- reader->bit = reader->bit % 8; \
- } \
- } \
- \
- return ret; \
+ return _gst_bit_reader_get_bits_uint##bits##_inline (reader, val, nbits); \
}
GST_BIT_READER_READ_BITS (8);
*/
#define GST_BIT_READER_INIT_FROM_BUFFER(buffer) {GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer), 0, 0}
+/* Unchecked variants */
+
+static inline void
+gst_bit_reader_skip_unchecked (GstBitReader * reader, guint nbits)
+{
+ reader->bit += nbits;
+ reader->byte += reader->bit / 8;
+ reader->bit = reader->bit % 8;
+}
+
+static inline void
+gst_bit_reader_skip_to_byte_unchecked (GstBitReader * reader)
+{
+ if (reader->bit) {
+ reader->bit = 0;
+ reader->byte++;
+ }
+}
+
+#define __GST_BIT_READER_READ_BITS_UNCHECKED(bits) \
+static inline guint##bits \
+gst_bit_reader_peek_bits_uint##bits##_unchecked (const GstBitReader *reader, guint nbits) \
+{ \
+ guint##bits ret = 0; \
+ const guint8 *data; \
+ guint byte, bit; \
+ \
+ data = reader->data; \
+ byte = reader->byte; \
+ bit = reader->bit; \
+ \
+ while (nbits > 0) { \
+ guint toread = MIN (nbits, 8 - bit); \
+ \
+ ret <<= toread; \
+ ret |= (data[byte] & (0xff >> bit)) >> (8 - toread - bit); \
+ \
+ bit += toread; \
+ if (bit >= 8) { \
+ byte++; \
+ bit = 0; \
+ } \
+ nbits -= toread; \
+ } \
+ \
+ return ret; \
+} \
+\
+static inline guint##bits \
+gst_bit_reader_get_bits_uint##bits##_unchecked (GstBitReader *reader, guint nbits) \
+{ \
+ guint##bits ret; \
+ \
+ ret = gst_bit_reader_peek_bits_uint##bits##_unchecked (reader, nbits); \
+ \
+ gst_bit_reader_skip_unchecked (reader, nbits); \
+ \
+ return ret; \
+}
+
+__GST_BIT_READER_READ_BITS_UNCHECKED (8)
+__GST_BIT_READER_READ_BITS_UNCHECKED (16)
+__GST_BIT_READER_READ_BITS_UNCHECKED (32)
+__GST_BIT_READER_READ_BITS_UNCHECKED (64)
+
+#undef __GST_BIT_READER_READ_BITS_UNCHECKED
+
+/* unchecked variants -- do not use */
+
+static inline guint
+_gst_bit_reader_get_size_unchecked (const GstBitReader * reader)
+{
+ return reader->size * 8;
+}
+
+static inline guint
+_gst_bit_reader_get_pos_unchecked (const GstBitReader * reader)
+{
+ return reader->byte * 8 + reader->bit;
+}
+
+static inline guint
+_gst_bit_reader_get_remaining_unchecked (const GstBitReader * reader)
+{
+ return reader->size * 8 - (reader->byte * 8 + reader->bit);
+}
+
+/* inlined variants -- do not use directly */
+static inline guint
+_gst_bit_reader_get_size_inline (const GstBitReader * reader)
+{
+ g_return_val_if_fail (reader != NULL, 0);
+
+ return _gst_bit_reader_get_size_unchecked (reader);
+}
+
+static inline guint
+_gst_bit_reader_get_pos_inline (const GstBitReader * reader)
+{
+ g_return_val_if_fail (reader != NULL, 0);
+
+ return _gst_bit_reader_get_pos_unchecked (reader);
+}
+
+static inline guint
+_gst_bit_reader_get_remaining_inline (const GstBitReader * reader)
+{
+ g_return_val_if_fail (reader != NULL, 0);
+
+ return _gst_bit_reader_get_remaining_unchecked (reader);
+}
+
+static inline gboolean
+_gst_bit_reader_skip_inline (GstBitReader * reader, guint nbits)
+{
+ g_return_val_if_fail (reader != NULL, FALSE);
+
+ if (_gst_bit_reader_get_remaining_unchecked (reader) < nbits)
+ return FALSE;
+
+ gst_bit_reader_skip_unchecked (reader, nbits);
+
+ return TRUE;
+}
+
+static inline gboolean
+_gst_bit_reader_skip_to_byte_inline (GstBitReader * reader)
+{
+ g_return_val_if_fail (reader != NULL, FALSE);
+
+ if (reader->byte > reader->size)
+ return FALSE;
+
+ gst_bit_reader_skip_to_byte_unchecked (reader);
+
+ return TRUE;
+}
+
+#define __GST_BIT_READER_READ_BITS_INLINE(bits) \
+static inline gboolean \
+_gst_bit_reader_get_bits_uint##bits##_inline (GstBitReader *reader, guint##bits *val, guint nbits) \
+{ \
+ g_return_val_if_fail (reader != NULL, FALSE); \
+ g_return_val_if_fail (val != NULL, FALSE); \
+ g_return_val_if_fail (nbits <= bits, FALSE); \
+ \
+ if (_gst_bit_reader_get_remaining_unchecked (reader) < nbits) \
+ return FALSE; \
+\
+ *val = gst_bit_reader_get_bits_uint##bits##_unchecked (reader, nbits); \
+ return TRUE; \
+} \
+\
+static inline gboolean \
+_gst_bit_reader_peek_bits_uint##bits##_inline (const GstBitReader *reader, guint##bits *val, guint nbits) \
+{ \
+ g_return_val_if_fail (reader != NULL, FALSE); \
+ g_return_val_if_fail (val != NULL, FALSE); \
+ g_return_val_if_fail (nbits <= bits, FALSE); \
+ \
+ if (_gst_bit_reader_get_remaining_unchecked (reader) < nbits) \
+ return FALSE; \
+\
+ *val = gst_bit_reader_peek_bits_uint##bits##_unchecked (reader, nbits); \
+ return TRUE; \
+}
+
+__GST_BIT_READER_READ_BITS_INLINE (8)
+__GST_BIT_READER_READ_BITS_INLINE (16)
+__GST_BIT_READER_READ_BITS_INLINE (32)
+__GST_BIT_READER_READ_BITS_INLINE (64)
+
+#undef __GST_BIT_READER_READ_BITS_INLINE
+
+#ifndef GST_BIT_READER_DISABLE_INLINES
+
+#define gst_bit_reader_get_size(reader) \
+ _gst_bit_reader_get_size_inline (reader)
+#define gst_bit_reader_get_pos(reader) \
+ _gst_bit_reader_get_pos_inline (reader)
+#define gst_bit_reader_get_remaining(reader) \
+ _gst_bit_reader_get_remaining_inline (reader)
+
+/* we use defines here so we can add the G_LIKELY() */
+
+#define gst_bit_reader_skip(reader, nbits)\
+ G_LIKELY (_gst_bit_reader_skip_inline(reader, nbits))
+#define gst_bit_reader_skip_to_byte(reader)\
+ G_LIKELY (_gst_bit_reader_skip_to_byte_inline(reader))
+
+#define gst_bit_reader_get_bits_uint8(reader, val, nbits) \
+ G_LIKELY (_gst_bit_reader_get_bits_uint8_inline (reader, val, nbits))
+#define gst_bit_reader_get_bits_uint16(reader, val, nbits) \
+ G_LIKELY (_gst_bit_reader_get_bits_uint16_inline (reader, val, nbits))
+#define gst_bit_reader_get_bits_uint32(reader, val, nbits) \
+ G_LIKELY (_gst_bit_reader_get_bits_uint32_inline (reader, val, nbits))
+#define gst_bit_reader_get_bits_uint64(reader, val, nbits) \
+ G_LIKELY (_gst_bit_reader_get_bits_uint64_inline (reader, val, nbits))
+
+#define gst_bit_reader_peek_bits_uint8(reader, val, nbits) \
+ G_LIKELY (_gst_bit_reader_peek_bits_uint8_inline (reader, val, nbits))
+#define gst_bit_reader_peek_bits_uint16(reader, val, nbits) \
+ G_LIKELY (_gst_bit_reader_peek_bits_uint16_inline (reader, val, nbits))
+#define gst_bit_reader_peek_bits_uint32(reader, val, nbits) \
+ G_LIKELY (_gst_bit_reader_peek_bits_uint32_inline (reader, val, nbits))
+#define gst_bit_reader_peek_bits_uint64(reader, val, nbits) \
+ G_LIKELY (_gst_bit_reader_peek_bits_uint64_inline (reader, val, nbits))
+#endif
+
G_END_DECLS
#endif /* __GST_BIT_READER_H__ */
0xfe, 0xdc, 0xba, 0x09, 0x87, 0x65, 0x43, 0x21
};
GstBitReader reader = GST_BIT_READER_INIT (data, 16);
- guint8 a;
- guint16 b;
- guint32 c;
- guint64 d;
+ guint8 a = 0;
+ guint16 b = 0;
+ guint32 c = 0;
+ guint64 d = 0;
/* 8 bit */
GET_CHECK (&reader, a, 8, 8, 0x12);
projects / platform / upstream / gstreamer.git / commitdiff