put_bits.h File Reference

bitstream writer API More...

#include <stdint.h>
#include <stddef.h>
#include <assert.h>
#include "libavutil/intreadwrite.h"
#include "libavutil/avassert.h"

Go to the source code of this file.

Data Structures
struct	PutBitContext

Functions
static void	init_put_bits (PutBitContext *s, uint8_t *buffer, int buffer_size)
	Initialize the PutBitContext s.
static void	rebase_put_bits (PutBitContext *s, uint8_t *buffer, int buffer_size)
	Rebase the bit writer onto a reallocated buffer.
static int	put_bits_count (PutBitContext *s)
static int	put_bits_left (PutBitContext *s)
static void	flush_put_bits (PutBitContext *s)
	Pad the end of the output stream with zeros.
void	avpriv_align_put_bits (PutBitContext *s)
	Pad the bitstream with zeros up to the next byte boundary.
void	avpriv_put_string (PutBitContext *pb, const char *string, int terminate_string)
	Put the string string in the bitstream.
void	avpriv_copy_bits (PutBitContext *pb, const uint8_t *src, int length)
	Copy the content of src to the bitstream.
static void	put_bits (PutBitContext *s, int n, unsigned int value)
	Write up to 31 bits into a bitstream.
static void	put_sbits (PutBitContext *pb, int n, int32_t value)
static void av_unused	put_bits32 (PutBitContext *s, uint32_t value)
	Write exactly 32 bits into a bitstream.
static uint8_t *	put_bits_ptr (PutBitContext *s)
	Return the pointer to the byte where the bitstream writer will put the next bit.
static void	skip_put_bytes (PutBitContext *s, int n)
	Skip the given number of bytes.
static void	skip_put_bits (PutBitContext *s, int n)
	Skip the given number of bits.
static void	set_put_bits_buffer_size (PutBitContext *s, int size)
	Change the end of the buffer.

Detailed Description

bitstream writer API

Definition in file put_bits.h.

Function Documentation

static void init_put_bits ( PutBitContext *  s, uint8_t *  buffer, int  buffer_size  )

inlinestatic

Initialize the PutBitContext s.

Parameters

buffer	the buffer where to put bits
buffer_size	the size in bytes of buffer

Definition at line 49 of file put_bits.h.

Referenced by aac_adtstoasc_filter(), aac_encode_frame(), adts_decode_extradata(), adts_write_frame_header(), adx_encode(), avpriv_dca_convert_bitstream(), decode_init(), decode_packet(), dnxhd_encode_thread(), dv_decode_video_segment(), dv_encode_video_segment(), encode_bitstream(), encode_block(), encode_ext_header(), encode_frame(), encode_init(), encode_picture_ls(), encode_slice(), encode_slice_plane(), encode_thread(), ff_ac3_output_frame(), ff_init_cabac_encoder(), ff_lzw_encode_init(), ff_mjpeg_find_marker(), ff_mpeg4_init_partitions(), ff_mpv_encode_picture(), flush(), latm_write_packet(), ljpeg_encode_frame(), main(), mov_write_ac3_tag(), mov_write_dvc1_structs(), mov_write_eac3_tag(), MPA_encode_frame(), pnm_decode_frame(), put_audio_specific_config(), put_line(), put_main_header(), put_pack_header(), put_swf_matrix(), put_swf_rect(), put_system_header(), ra144_encode_frame(), read_packet(), s302m_encode2_frame(), save_bits(), send_mode_a(), send_mode_b(), svq1_encode_frame(), svq1_encode_plane(), swf_write_header(), tta_encode_frame(), vorbis_encode_frame(), wavpack_encode_block(), wmavoice_decode_packet(), write_frame(), write_header(), write_huff_codes(), write_streaminfo(), and xsub_encode().

static void rebase_put_bits ( PutBitContext *  s, uint8_t *  buffer, int  buffer_size  )

inlinestatic

Rebase the bit writer onto a reallocated buffer.

Parameters

buffer	the buffer where to put bits
buffer_size	the size in bytes of buffer, must be larger than the previous size

Definition at line 72 of file put_bits.h.

Referenced by encode_thread().

static int put_bits_count ( PutBitContext *  s )

inlinestatic

Returns

the total number of bits written to the bitstream.

Definition at line 86 of file put_bits.h.

Referenced by aac_encode_frame(), avpriv_copy_bits(), avpriv_copy_pce_data(), avpriv_dca_convert_bitstream(), copy_bits(), dnxhd_encode_thread(), dv_decode_video_segment(), dv_encode_video_segment(), encode_422_bitstream(), encode_alpha_plane(), encode_bgra_bitstream(), encode_block(), encode_frame(), encode_gray_bitstream(), encode_init(), encode_line(), encode_mb(), encode_mb_hq(), encode_picture(), encode_picture_ls(), encode_plane_bitstream(), encode_slice_plane(), encode_superframe(), encode_thread(), ff_mjpeg_encode_picture_header(), ff_mjpeg_encode_stuffing(), ff_mjpeg_escape_FF(), ff_mpeg1_encode_picture_header(), ff_mpeg4_merge_partitions(), ff_mpeg4_stuffing(), ff_mpv_encode_picture(), floor_encode(), get_bits_diff(), latm_write_packet(), ljpeg_encode_bgr(), ljpeg_encode_frame(), ljpeg_encode_yuv(), merge_context_after_encode(), MPA_encode_frame(), output_frame_end(), put_bitstream_info(), put_codeword(), put_main_header(), save_bits(), skip_put_bytes(), svq1_encode_frame(), svq1_encode_plane(), tta_encode_frame(), update_mb_info(), vorbis_encode_frame(), wavpack_encode_block(), write_frame(), write_frame_footer(), write_frame_header(), write_huff_codes(), write_mb_info(), writtenBytes(), xsub_encode(), and xsub_encode_rle().

static int put_bits_left ( PutBitContext *  s )

inlinestatic

Returns

the number of bits available in the bitstream.

Definition at line 94 of file put_bits.h.

Referenced by dv_encode_ac(), encode_slice(), and save_bits().

static void flush_put_bits ( PutBitContext *  s )

inlinestatic

Pad the end of the output stream with zeros.

Definition at line 102 of file put_bits.h.

Referenced by aac_adtstoasc_filter(), aac_encode_frame(), adts_decode_extradata(), adts_write_frame_header(), adx_encode(), avpriv_copy_bits(), avpriv_dca_convert_bitstream(), dnxhd_encode_thread(), dv_decode_video_segment(), dv_encode_video_segment(), encode_alpha_plane(), encode_bitstream(), encode_block(), encode_ext_header(), encode_frame(), encode_init(), encode_picture_ls(), encode_slice_plane(), encode_superframe(), encode_thread(), ff_mjpeg_escape_FF(), ff_mjpeg_find_marker(), ff_mpeg4_merge_partitions(), ff_mpv_encode_picture(), gif_image_write_image(), jpeg_put_comments(), jpeg_table_header(), latm_write_packet(), ljpeg_encode_frame(), main(), merge_context_after_encode(), mov_write_ac3_tag(), mov_write_dvc1_structs(), mov_write_eac3_tag(), output_frame_end(), pnm_decode_frame(), put_audio_specific_config(), put_line(), put_main_header(), put_pack_header(), put_swf_matrix(), put_swf_rect(), put_system_header(), ra144_encode_frame(), read_packet(), s302m_encode2_frame(), save_bits(), send_mode_a(), send_mode_b(), svq1_encode_frame(), svq1_encode_plane(), swf_write_header(), tta_encode_frame(), vorbis_encode_frame(), wavpack_encode_block(), wmavoice_decode_packet(), write_frame(), write_frame_footer(), write_frame_header(), write_header(), write_huff_codes(), write_slice_end(), write_streaminfo(), and xsub_encode().

void avpriv_align_put_bits

(

PutBitContext *

s

)

Pad the bitstream with zeros up to the next byte boundary.

Definition at line 47 of file bitstream.c.

Referenced by avpriv_copy_pce_data(), encode_block(), encode_frame(), encode_picture_ls(), ff_flv_encode_picture_header(), ff_h261_encode_picture_header(), ff_h263_encode_picture_header(), ff_msmpeg4_encode_picture_header(), ff_rv10_encode_picture_header(), latm_write_packet(), put_bitstream_info(), put_header(), write_slice_end(), xsub_encode(), and xsub_encode_rle().

void avpriv_put_string	(	PutBitContext *	pb,
		const char *	string,
		int	terminate_string
	)

Put the string string in the bitstream.

Parameters

terminate_string

0-terminates the written string if value is 1

Definition at line 52 of file bitstream.c.

Referenced by jpeg_put_comments(), and mpeg4_encode_vol_header().

void avpriv_copy_bits	(	PutBitContext *	pb,
		const uint8_t *	src,
		int	length
	)

Copy the content of src to the bitstream.

Parameters

length

the number of bits of src to copy

Definition at line 63 of file bitstream.c.

Referenced by copy_bits(), encode_thread(), ff_mpeg4_merge_partitions(), latm_write_frame_header(), latm_write_packet(), merge_context_after_encode(), save_bits(), and svq1_encode_plane().

static void put_bits ( PutBitContext *  s, int  n, unsigned int  value  )

inlinestatic

Write up to 31 bits into a bitstream.

Use put_bits32 to write 32 bits.

Definition at line 153 of file put_bits.h.

Referenced by put_bits32(), and put_sbits().

static void put_sbits ( PutBitContext *  pb, int  n, int32_t  value  )

inlinestatic

Definition at line 193 of file put_bits.h.

Referenced by adx_encode(), asv1_put_level(), dv_encode_video_segment(), encode_acs(), encode_block(), encode_vlc_codeword(), ff_flv2_encode_ac_esc(), ff_h261_encode_picture_header(), ff_h263_encode_picture_header(), ff_mjpeg_encode_dc(), ff_msmpeg4_encode_block(), ff_rv20_encode_picture_header(), h261_encode_block(), h263_encode_block(), mpeg1_encode_block(), mpeg1_encode_mb_internal(), mpeg1_encode_sequence_header(), output_audio_block(), put_header(), put_line(), set_ur_golomb_jpegls(), write_element(), and write_subframes().

static void av_unused put_bits32 ( PutBitContext *  s, uint32_t  value  )

static

Write exactly 32 bits into a bitstream.

Definition at line 203 of file put_bits.h.

Referenced by dv_decode_video_segment(), mov_write_dvc1_structs(), put_float(), put_main_header(), put_pack_header(), put_system_header(), tta_encode_frame(), and write_element_header().

static uint8_t* put_bits_ptr ( PutBitContext *  s )

inlinestatic

Return the pointer to the byte where the bitstream writer will put the next bit.

Definition at line 220 of file put_bits.h.

Referenced by avpriv_copy_bits(), encode_block(), encode_slice_plane(), encode_superframe(), encode_thread(), ff_h261_encode_picture_header(), ff_h263_encode_picture_header(), ff_mpeg4_init_partitions(), jpeg_put_comments(), jpeg_table_header(), ljpeg_encode_frame(), output_frame_end(), put_pack_header(), put_swf_matrix(), put_swf_rect(), put_system_header(), and swf_write_header().

static void skip_put_bytes ( PutBitContext *  s, int  n  )

inlinestatic

Skip the given number of bytes.

PutBitContext must be flushed & aligned to a byte boundary before calling this.

Definition at line 229 of file put_bits.h.

Referenced by avpriv_copy_bits(), and ff_mjpeg_escape_FF().

static void skip_put_bits ( PutBitContext *  s, int  n  )

inlinestatic

Skip the given number of bits.

Must only be used if the actual values in the bitstream do not matter. If n is 0 the behavior is undefined.

Definition at line 241 of file put_bits.h.

Referenced by ff_h263_encode_motion_vector(), and mpeg4_encode_blocks().

static void set_put_bits_buffer_size ( PutBitContext *  s, int  size  )

inlinestatic

Change the end of the buffer.

Parameters

size	the new size in bytes of the buffer where to put bits

Definition at line 253 of file put_bits.h.

Referenced by ff_mpeg4_init_partitions(), and ff_mpeg4_merge_partitions().