hvirtual/quicktime/ffmpeg/libavcodec/bitstream.c File Reference

#include "avcodec.h"
#include "bitstream.h"

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Defines
#define	GET_DATA(v, table, i, wrap, size)
Functions
void	align_put_bits (PutBitContext *s)
void	put_string (PutBitContext *pbc, char *s, int put_zero)
unsigned int	get_bits_long (GetBitContext *s, int n)
unsigned int	show_bits_long (GetBitContext *s, int n)
void	align_get_bits (GetBitContext *s)
int	check_marker (GetBitContext *s, const char *msg)
static int	alloc_table (VLC *vlc, int size, int use_static)
static int	build_table (VLC *vlc, int table_nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, uint32_t code_prefix, int n_prefix, int flags)
int	init_vlc (VLC *vlc, int nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, int use_static)
void	free_vlc (VLC *vlc)

---

Define Documentation

#define GET_DATA	(	v,
		table,
		i,
		wrap,
		size		)

Value:

{\
    const uint8_t *ptr = (const uint8_t *)table + i * wrap;\
    switch(size) {\
    case 1:\
        v = *(const uint8_t *)ptr;\
        break;\
    case 2:\
        v = *(const uint16_t *)ptr;\
        break;\
    default:\
        v = *(const uint32_t *)ptr;\
        break;\
    }\
}

Definition at line 95 of file bitstream.c.

Referenced by build_table().

---

Function Documentation

void align_get_bits

(

GetBitContext *

s

)

Definition at line 76 of file bitstream.c.

References get_bits_count(), and skip_bits().

Referenced by decode_frame(), decode_mb_cavlc(), decode_slice(), ff_h261_resync(), ff_h263_resync(), ff_mpeg4_decode_picture_header(), h263_decode_picture_header(), ljpeg_decode_rgb_scan(), ljpeg_decode_yuv_scan(), mjpeg_decode_scan(), mpeg4_is_resync(), sonic_decode_frame(), and wma_decode_block().

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void align_put_bits

(

PutBitContext *

s

)

Definition at line 31 of file bitstream.c.

References PutBitContext::bit_left, and put_bits().

Referenced by encode_frame(), ff_h261_encode_picture_header(), and flush_put_bits().

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static int alloc_table	(	VLC *	vlc,
		int	size,
		int	use_static
	)			[static]

Definition at line 112 of file bitstream.c.

References av_realloc(), av_realloc_static(), VLC::bits, VLC::table, VLC::table_allocated, VLC::table_size, and VLC_TYPE.

Referenced by build_table(), and mp_decode_layer2().

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static int build_table	(	VLC *	vlc,
		int	table_nb_bits,
		int	nb_codes,
		const void *	bits,
		int	bits_wrap,
		int	bits_size,
		const void *	codes,
		int	codes_wrap,
		int	codes_size,
		uint32_t	code_prefix,
		int	n_prefix,
		int	flags
	)			[static]

Definition at line 131 of file bitstream.c.

References alloc_table(), av_log(), AV_LOG_DEBUG, AV_LOG_ERROR, GET_DATA, INIT_VLC_LE, INIT_VLC_USE_STATIC, nb, NULL, VLC::table, and VLC_TYPE.

Referenced by init_vlc().

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int check_marker	(	GetBitContext *	s,
		const char *	msg
	)

Definition at line 82 of file bitstream.c.

References av_log(), AV_LOG_INFO, get_bits1(), and NULL.

Referenced by decode_vol_header(), decode_vop_header(), and mpeg4_decode_video_packet_header().

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void free_vlc

(

VLC *

vlc

)

Definition at line 289 of file bitstream.c.

References av_free(), and VLC::table.

Referenced by decode_end(), dvvideo_init(), mjpeg_decode_dht(), mjpeg_decode_end(), read_huffman_tables(), read_old_huffman_tables(), vorbis_free(), and wma_decode_end().

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unsigned int get_bits_long	(	GetBitContext *	s,
		int	n
	)

reads 0-32 bits.

Definition at line 55 of file bitstream.c.

References get_bits().

Referenced by decode_vui_parameters(), ff_mpeg4_decode_partitions(), flac_decode_frame(), flv_h263_decode_picture_header(), get_le16(), get_le32(), intel_h263_decode_picture_header(), metadata_streaminfo(), mjpegb_decode_frame(), shorten_decode_frame(), show_bits_long(), and theora_decode_comments().

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int init_vlc	(	VLC *	vlc,
		int	nb_bits,
		int	nb_codes,
		const void *	bits,
		int	bits_wrap,
		int	bits_size,
		const void *	codes,
		int	codes_wrap,
		int	codes_size,
		int	use_static
	)

Definition at line 257 of file bitstream.c.

References av_free(), VLC::bits, build_table(), NULL, VLC::table, VLC::table_allocated, and VLC::table_size.

Referenced by build_vlc(), decode_init(), decode_init_vlc(), dvvideo_init(), ff_msmpeg4_decode_init(), h261_decode_init_vlc(), h263_decode_init_vlc(), init_2d_vlc_rl(), init_coef_vlc(), init_vlc_rl(), init_vlcs(), ir2_decode_init(), read_huffman_tables(), read_old_huffman_tables(), rv10_decode_init(), svq1_decode_init(), vorbis_parse_setup_hdr_codebooks(), vp3_decode_init(), and wma_decode_init().

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void put_string	(	PutBitContext *	pbc,
		char *	s,
		int	put_zero
	)

Definition at line 40 of file bitstream.c.

References put_bits().

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unsigned int show_bits_long	(	GetBitContext *	s,
		int	n
	)

shows 0-32 bits.

Definition at line 66 of file bitstream.c.

References get_bits_long(), and show_bits().

Referenced by flac_decode_frame(), and mpeg4_decode_partition_a().

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