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

#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "simple_idct.h"
#include "dvdata.h"

Include dependency graph for dv.c:

Go to the source code of this file.

Data Structures

struct DVVideoContext

struct dv_vlc_pair

struct BlockInfo

struct EncBlockInfo

Defines

#define TEX_VLC_BITS   9

#define DV_VLC_MAP_RUN_SIZE   64

#define DV_VLC_MAP_LEV_SIZE   512

#define SC(x, y)   ((s[x] - s[y]) ^ ((s[x] - s[y]) >> 7))

Functions

static void dv_build_unquantize_tables (DVVideoContext *s, uint8_t *perm)

static int dvvideo_init (AVCodecContext *avctx)

static int get_bits_left (GetBitContext *s)

static int get_bits_size (GetBitContext *s)

static int put_bits_left (PutBitContext *s)

static void dv_decode_ac (GetBitContext *gb, BlockInfo *mb, DCTELEM *block)

static void bit_copy (PutBitContext *pb, GetBitContext *gb)

static void dv_decode_video_segment (DVVideoContext *s, uint8_t *buf_ptr1, const uint16_t *mb_pos_ptr)

static always_inline int dv_rl2vlc (int run, int l, uint32_t *vlc)

static always_inline int dv_rl2vlc_size (int run, int l)

static always_inline void dv_encode_ac (EncBlockInfo *bi, PutBitContext *pb_pool, int pb_size)

static always_inline void dv_set_class_number (DCTELEM *blk, EncBlockInfo *bi, const uint8_t *zigzag_scan, int bias)

static always_inline int dv_guess_dct_mode (DCTELEM *blk)

static void dv_guess_qnos (EncBlockInfo *blks, int *qnos)

static void dv_encode_video_segment (DVVideoContext *s, uint8_t *dif, const uint16_t *mb_pos_ptr)

static int dv_decode_mt (AVCodecContext *avctx, void *sl)

static int dv_encode_mt (AVCodecContext *avctx, void *sl)

static int dvvideo_decode_frame (AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)

static int dvvideo_encode_frame (AVCodecContext *c, uint8_t *buf, int buf_size, void *data)

Variables

static uint8_t ** dv_anchor

static RL_VLC_ELEM * dv_rl_vlc

static struct dv_vlc_pair DV_VLC_MAP_LEV_SIZE

static const uint16_t block_sizes [6]

static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5

static const int mb_area_start [5] = { 1, 6, 21, 43, 64 }

AVCodec dvvideo_decoder

Detailed Description

DV codec.

Definition in file dv.c.

Define Documentation

#define DV_VLC_MAP_LEV_SIZE 512

Definition at line 57 of file dv.c.

Referenced by dvvideo_init().

#define DV_VLC_MAP_RUN_SIZE 64

Definition at line 56 of file dv.c.

Referenced by dvvideo_init().

#define SC	(	x,
		y		)	((s[x] - s[y]) ^ ((s[x] - s[y]) >> 7))

Definition at line 682 of file dv.c.

Referenced by dv_guess_dct_mode().

#define TEX_VLC_BITS 9

Definition at line 50 of file dv.c.

Referenced by dv_decode_ac(), dvvideo_init(), h263_decode_block(), init_2d_vlc_rl(), mdec_decode_block_intra(), mpeg1_decode_block_inter(), mpeg1_decode_block_intra(), mpeg1_fast_decode_block_inter(), mpeg2_decode_block_intra(), mpeg2_decode_block_non_intra(), mpeg2_fast_decode_block_intra(), mpeg2_fast_decode_block_non_intra(), mpeg4_decode_block(), and msmpeg4_decode_block().

Function Documentation

static void bit_copy	(	PutBitContext *	pb,
		GetBitContext *	gb
	)			`[inline, static]`

Definition at line 348 of file dv.c.

References get_bits(), get_bits_left(), and put_bits().

Referenced by dv_decode_video_segment().

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static void dv_build_unquantize_tables	(	DVVideoContext *	s,
		uint8_t *	perm
	)			`[static]`

Definition at line 71 of file dv.c.

References dv_248_areas, dv_88_areas, DVVideoContext::dv_idct_shift, and dv_quant_shifts.

Referenced by dvvideo_init().

static void dv_decode_ac	(	GetBitContext *	gb,
		BlockInfo *	mb,
		DCTELEM *	block
	)			`[static]`

Definition at line 285 of file dv.c.

References CLOSE_READER, get_bits_size(), RL_VLC_ELEM::len, RL_VLC_ELEM::level, level, NEG_USR32, OPEN_READER, BlockInfo::partial_bit_buffer, BlockInfo::partial_bit_count, BlockInfo::pos, RL_VLC_ELEM::run, run, BlockInfo::scan_table, BlockInfo::shift_table, SHOW_UBITS, TEX_VLC_BITS, and UPDATE_CACHE.

Referenced by dv_decode_video_segment().

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static int dv_decode_mt	(	AVCodecContext *	avctx,
		void *	sl
	)			`[static]`

Definition at line 866 of file dv.c.

References DVVideoContext::buf, dv_decode_video_segment(), AVCodecContext::priv_data, s, DVVideoContext::sys, and DVprofile::video_place.

Referenced by dvvideo_decode_frame().

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static void dv_decode_video_segment	(	DVVideoContext *	s,
		uint8_t *	buf_ptr1,
		const uint16_t *	mb_pos_ptr
	)			`[inline, static]`

Definition at line 361 of file dv.c.

References __align8, av_log(), AV_LOG_ERROR, bit_copy(), block_sizes, BlockInfo::dct_mode, dv_decode_ac(), DVVideoContext::dv_idct_shift, dv_quant_offset, DVVideoContext::dv_zigzag, flush_put_bits(), get_bits(), get_bits1(), get_bits_left(), get_sbits(), DVVideoContext::idct_put, idct_put(), init_get_bits(), init_put_bits(), line_size, NULL, BlockInfo::partial_bit_count, DVVideoContext::picture, DVprofile::pix_fmt, PIX_FMT_YUV411P, pixels, BlockInfo::pos, put_bits_count(), quant(), BlockInfo::scan_table, BlockInfo::shift_table, and DVVideoContext::sys.

Referenced by dv_decode_mt().

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static always_inline void dv_encode_ac	(	EncBlockInfo *	bi,
		PutBitContext *	pb_pool,
		int	pb_size
	)			`[static]`

Definition at line 601 of file dv.c.

References EncBlockInfo::cur_ac, dv_rl2vlc(), EncBlockInfo::mb, EncBlockInfo::partial_bit_buffer, EncBlockInfo::partial_bit_count, put_bits(), and put_bits_left().

Referenced by dv_encode_video_segment().

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static int dv_encode_mt	(	AVCodecContext *	avctx,
		void *	sl
	)			`[static]`

Definition at line 875 of file dv.c.

References DVVideoContext::buf, dv_encode_video_segment(), AVCodecContext::priv_data, s, DVVideoContext::sys, and DVprofile::video_place.

Referenced by dvvideo_encode_frame().

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static void dv_encode_video_segment	(	DVVideoContext *	s,
		uint8_t *	dif,
		const uint16_t *	mb_pos_ptr
	)			`[inline, static]`

Definition at line 749 of file dv.c.

References __align8, EncBlockInfo::area_q, b, EncBlockInfo::bit_size, block_sizes, EncBlockInfo::cno, EncBlockInfo::cur_ac, EncBlockInfo::dct_mode, dv_encode_ac(), dv_guess_dct_mode(), dv_guess_qnos(), dv_set_class_number(), DVVideoContext::fdct, ff_zigzag248_direct, ff_zigzag_direct, flush_put_bits(), DVVideoContext::get_pixels, init_put_bits(), EncBlockInfo::mb, EncBlockInfo::partial_bit_buffer, EncBlockInfo::partial_bit_count, DVVideoContext::picture, DVprofile::pix_fmt, PIX_FMT_YUV411P, put_bits(), DVVideoContext::sys, and vs_total_ac_bits.

Referenced by dv_encode_mt().

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static always_inline int dv_guess_dct_mode ( DCTELEM * blk ) [static]

Definition at line 683 of file dv.c.

References s, and SC.

Referenced by dv_encode_video_segment().

static void dv_guess_qnos	(	EncBlockInfo *	blks,
		int *	qnos
	)			`[inline, static]`

Definition at line 707 of file dv.c.

References a, EncBlockInfo::area_q, b, EncBlockInfo::bit_size, EncBlockInfo::cno, dv_quant_offset, dv_quant_shifts, dv_rl2vlc_size(), EncBlockInfo::mb, mb_area_start, EncBlockInfo::prev_run, and vs_total_ac_bits.

Referenced by dv_encode_video_segment().

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static always_inline int dv_rl2vlc	(	int	run,
		int	l,
		uint32_t *	vlc
	)			`[static]`

Definition at line 577 of file dv.c.

Referenced by dv_encode_ac().

static always_inline int dv_rl2vlc_size	(	int	run,
		int	l
	)			`[static]`

Definition at line 583 of file dv.c.

Referenced by dv_guess_qnos(), and dv_set_class_number().

static always_inline void dv_set_class_number	(	DCTELEM *	blk,
		EncBlockInfo *	bi,
		const uint8_t *	zigzag_scan,
		int	bias
	)			`[static]`

Definition at line 647 of file dv.c.

References EncBlockInfo::bit_size, EncBlockInfo::cno, dv_rl2vlc_size(), EncBlockInfo::mb, mb_area_start, and EncBlockInfo::prev_run.

Referenced by dv_encode_video_segment().

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static int dvvideo_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		uint8_t *	buf,
		int	buf_size
	)			`[static]`

Definition at line 886 of file dv.c.

References av_log(), AV_LOG_ERROR, DVVideoContext::buf, DVprofile::difseg_size, dv_anchor, dv_decode_mt(), dv_frame_profile(), emms_c, AVCodecContext::execute, DVprofile::frame_size, AVCodecContext::get_buffer, DVprofile::height, AVCodecContext::height, NULL, DVVideoContext::picture, DVprofile::pix_fmt, AVCodecContext::pix_fmt, AVCodecContext::priv_data, AVCodecContext::release_buffer, s, DVVideoContext::sys, DVprofile::width, and AVCodecContext::width.

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static int dvvideo_encode_frame	(	AVCodecContext *	c,
		uint8_t *	buf,
		int	buf_size,
		void *	data
	)			`[static]`

Definition at line 923 of file dv.c.

References DVVideoContext::buf, DVprofile::difseg_size, dv_anchor, dv_codec_profile(), dv_encode_mt(), emms_c, AVCodecContext::execute, DVprofile::frame_size, NULL, DVVideoContext::picture, DVprofile::pix_fmt, AVCodecContext::pix_fmt, AVCodecContext::priv_data, s, and DVVideoContext::sys.

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static int dvvideo_init ( AVCodecContext * avctx ) [static]

Definition at line 96 of file dv.c.

References av_free(), av_malloc(), av_mallocz(), AVCodecContext::coded_frame, dsputil_init(), dv_anchor, dv_build_unquantize_tables(), dv_codec_profile(), dv_vlc_bits, dv_vlc_len, dv_vlc_level, DV_VLC_MAP_LEV_SIZE, DV_VLC_MAP_RUN_SIZE, dv_vlc_run, DVVideoContext::dv_zigzag, ENOMEM, DSPContext::fdct, DVVideoContext::fdct, DSPContext::fdct248, ff_zigzag248_direct, ff_zigzag_direct, free_vlc(), DSPContext::get_pixels, DVVideoContext::get_pixels, DSPContext::idct_permutation, DSPContext::idct_put, DVVideoContext::idct_put, init_vlc(), RL_VLC_ELEM::len, RL_VLC_ELEM::level, level, memcpy, NB_DV_VLC, DVVideoContext::picture, DVprofile::pix_fmt, AVCodecContext::pix_fmt, AVCodecContext::priv_data, RL_VLC_ELEM::run, run, s, simple_idct248_put(), VLC::table, VLC::table_size, and TEX_VLC_BITS.

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static int get_bits_left ( GetBitContext * s ) [inline, static]

Definition at line 269 of file dv.c.

References get_bits_count(), and GetBitContext::size_in_bits.

Referenced by bit_copy(), and dv_decode_video_segment().

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static int get_bits_size ( GetBitContext * s ) [inline, static]

Definition at line 274 of file dv.c.

References GetBitContext::size_in_bits.

Referenced by dv_decode_ac().

static int put_bits_left ( PutBitContext * s ) [inline, static]

Definition at line 279 of file dv.c.

References PutBitContext::buf, PutBitContext::buf_end, and put_bits_count().

Referenced by dv_encode_ac().

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Variable Documentation

const uint16_t block_sizes[6] [static]

Initial value:

 {
    112, 112, 112, 112, 80, 80
}

Definition at line 256 of file dv.c.

Referenced by dv_decode_video_segment(), and dv_encode_video_segment().

uint8_t** dv_anchor [static]

Definition at line 61 of file dv.c.

Referenced by dvvideo_decode_frame(), dvvideo_encode_frame(), and dvvideo_init().

RL_VLC_ELEM* dv_rl_vlc [static]

Definition at line 64 of file dv.c.

struct dv_vlc_pair DV_VLC_MAP_LEV_SIZE [static]

AVCodec dvvideo_decoder

Initial value:

 {
    "dvvideo",
    CODEC_TYPE_VIDEO,
    CODEC_ID_DVVIDEO,
    sizeof(DVVideoContext),
    dvvideo_init,
    NULL,
    NULL,
    dvvideo_decode_frame,
    CODEC_CAP_DR1,
    NULL
}

Definition at line 960 of file dv.c.

Referenced by avcodec_register_all().

const int mb_area_start[5] = { 1, 6, 21, 43, 64 } [static]

Definition at line 262 of file dv.c.

Referenced by dv_guess_qnos(), and dv_set_class_number().

const int vs_total_ac_bits = (100 * 4 + 68*2) * 5 [static]

Definition at line 260 of file dv.c.

Referenced by dv_encode_video_segment(), and dv_guess_qnos().


Data Structures
struct	DVVideoContext
struct	dv_vlc_pair
struct	BlockInfo
struct	EncBlockInfo
Defines
#define	TEX_VLC_BITS 9
#define	DV_VLC_MAP_RUN_SIZE 64
#define	DV_VLC_MAP_LEV_SIZE 512
#define	SC(x, y) ((s[x] - s[y]) ^ ((s[x] - s[y]) >> 7))
Functions
static void	dv_build_unquantize_tables (DVVideoContext s, uint8_t perm)
static int	dvvideo_init (AVCodecContext *avctx)
static int	get_bits_left (GetBitContext *s)
static int	get_bits_size (GetBitContext *s)
static int	put_bits_left (PutBitContext *s)
static void	dv_decode_ac (GetBitContext gb, BlockInfo mb, DCTELEM *block)
static void	bit_copy (PutBitContext pb, GetBitContext gb)
static void	dv_decode_video_segment (DVVideoContext s, uint8_t buf_ptr1, const uint16_t *mb_pos_ptr)
static always_inline int	dv_rl2vlc (int run, int l, uint32_t *vlc)
static always_inline int	dv_rl2vlc_size (int run, int l)
static always_inline void	dv_encode_ac (EncBlockInfo bi, PutBitContext pb_pool, int pb_size)
static always_inline void	dv_set_class_number (DCTELEM blk, EncBlockInfo bi, const uint8_t *zigzag_scan, int bias)
static always_inline int	dv_guess_dct_mode (DCTELEM *blk)
static void	dv_guess_qnos (EncBlockInfo blks, int qnos)
static void	dv_encode_video_segment (DVVideoContext s, uint8_t dif, const uint16_t *mb_pos_ptr)
static int	dv_decode_mt (AVCodecContext avctx, void sl)
static int	dv_encode_mt (AVCodecContext avctx, void sl)
static int	dvvideo_decode_frame (AVCodecContext avctx, void data, int data_size, uint8_t buf, int buf_size)
static int	dvvideo_encode_frame (AVCodecContext c, uint8_t buf, int buf_size, void *data)
Variables
static uint8_t **	dv_anchor
static RL_VLC_ELEM *	dv_rl_vlc
static struct dv_vlc_pair	DV_VLC_MAP_LEV_SIZE
static const uint16_t	block_sizes [6]
static const int	vs_total_ac_bits = (100 * 4 + 682) 5
static const int	mb_area_start [5] = { 1, 6, 21, 43, 64 }
AVCodec	dvvideo_decoder