hvirtual/quicktime/ffmpeg/libavcodec/4xm.c File Reference

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

Include dependency graph for 4xm.c:

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Data Structures

struct CFrameBuffer

struct FourXContext

Defines

#define BLOCK_TYPE_VLC_BITS   5

#define ACDC_VLC_BITS   9

#define CFRAME_BUFFER_COUNT   100

#define FIX_1_082392200   70936

#define FIX_1_414213562   92682

#define FIX_1_847759065   121095

#define FIX_2_613125930   171254

#define MULTIPLY(var, const)   (((var)*(const)) >> 16)

Functions

static void idct (DCTELEM block[64])

static void init_vlcs (FourXContext *f)

static void init_mv (FourXContext *f)

static void mcdc (uint16_t *dst, uint16_t *src, int log2w, int h, int stride, int scale, int dc)

static void decode_p_block (FourXContext *f, uint16_t *dst, uint16_t *src, int log2w, int log2h, int stride)

static int get32 (void *p)

static int decode_p_frame (FourXContext *f, uint8_t *buf, int length)

static int decode_i_block (FourXContext *f, DCTELEM *block)

static void idct_put (FourXContext *f, int x, int y)

static int decode_i_mb (FourXContext *f)

static uint8_t * read_huffman_tables (FourXContext *f, uint8_t *const buf)

static int decode_i_frame (FourXContext *f, uint8_t *buf, int length)

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

static void common_init (AVCodecContext *avctx)

static int decode_init (AVCodecContext *avctx)

static int decode_end (AVCodecContext *avctx)

Variables

static const uint8_t block_type_tab [4][8][2]

static const uint8_t size2index [4][4]

static const int8_t mv [256][2]

static const uint8_t dequant_table [64]

static VLC block_type_vlc [4]

AVCodec fourxm_decoder

Detailed Description

4XM codec.

Definition in file 4xm.c.

Define Documentation

#define ACDC_VLC_BITS 9

Definition at line 33 of file 4xm.c.

Referenced by decode_i_block(), decode_i_frame(), and read_huffman_tables().

#define BLOCK_TYPE_VLC_BITS 5

Definition at line 32 of file 4xm.c.

Referenced by decode_p_block(), and init_vlcs().

#define CFRAME_BUFFER_COUNT 100

Definition at line 35 of file 4xm.c.

Referenced by decode_end(), and decode_frame().

#define FIX_1_082392200 70936

Definition at line 131 of file 4xm.c.

Referenced by idct(), and RTjpeg_idct().

#define FIX_1_414213562 92682

Definition at line 132 of file 4xm.c.

Referenced by idct(), and RTjpeg_idct().

#define FIX_1_847759065 121095

Definition at line 133 of file 4xm.c.

Referenced by ff_fdct248_islow(), ff_jpeg_fdct_islow(), idct(), j_rev_dct(), j_rev_dct4(), row_fdct(), and RTjpeg_idct().

#define FIX_2_613125930 171254

Definition at line 134 of file 4xm.c.

Referenced by idct(), and RTjpeg_idct().

#define MULTIPLY	(	var,
		const		)	(((var)*(const)) >> 16)

Definition at line 136 of file 4xm.c.

Referenced by fdct_ifast(), fdct_ifast248(), ff_fdct248_islow(), ff_jpeg_fdct_islow(), idct(), j_rev_dct(), j_rev_dct4(), quicktime_rev_dct(), row_fdct(), and RTjpeg_idct().

Function Documentation

static void common_init ( AVCodecContext * avctx ) [static]

Definition at line 707 of file 4xm.c.

References FourXContext::avctx, FourXContext::dsp, dsputil_init(), and AVCodecContext::priv_data.

Referenced by decode_init(), encode_init(), ff_msmpeg4_decode_init(), and mpeg_decode_init().

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static int decode_end ( AVCodecContext * avctx ) [static]

Definition at line 727 of file 4xm.c.

References CFrameBuffer::allocated_size, av_freep(), FourXContext::bitstream_buffer, FourXContext::bitstream_buffer_size, CFRAME_BUFFER_COUNT, FourXContext::cfrm, CFrameBuffer::data, free_vlc(), FourXContext::pre_vlc, and AVCodecContext::priv_data.

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

Definition at line 599 of file 4xm.c.

References CFrameBuffer::allocated_size, av_fast_realloc(), av_log(), AV_LOG_ERROR, FourXContext::avctx, CFRAME_BUFFER_COUNT, FourXContext::cfrm, CODEC_FLAG_EMU_EDGE, AVCodecContext::coded_frame, FourXContext::current_picture, CFrameBuffer::data, decode_i_frame(), decode_p_frame(), emms_c, FF_INPUT_BUFFER_PADDING_SIZE, AVCodecContext::flags, AVCodecContext::frame_number, get32(), AVCodecContext::get_buffer, I_TYPE, CFrameBuffer::id, FourXContext::last_picture, memcpy, P_TYPE, picture, AVCodecContext::priv_data, AVCodecContext::release_buffer, and CFrameBuffer::size.

Referenced by flac_decode_frame().

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static int decode_i_block	(	FourXContext *	f,
		DCTELEM *	block
	)			`[static]`

decode block and dequantize. Note this is allmost identical to mjpeg

Definition at line 371 of file 4xm.c.

References ACDC_VLC_BITS, av_log(), AV_LOG_ERROR, FourXContext::avctx, dequant_table, ff_zigzag_direct, FourXContext::gb, get_vlc2(), get_xbits(), FourXContext::last_dc, level, FourXContext::pre_gb, FourXContext::pre_vlc, and VLC::table.

Referenced by decode_i_mb().

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static int decode_i_frame	(	FourXContext *	f,
		uint8_t *	buf,
		int	length
	)			`[static]`

Definition at line 553 of file 4xm.c.

References __attribute__(), ACDC_VLC_BITS, av_fast_realloc(), av_log(), AV_LOG_ERROR, FourXContext::avctx, FourXContext::bitstream_buffer, FourXContext::bitstream_buffer_size, DSPContext::bswap_buf, FourXContext::current_picture, decode_i_mb(), FourXContext::dsp, FF_INPUT_BUFFER_PADDING_SIZE, FourXContext::gb, get32(), get_vlc2(), AVCodecContext::height, height, idct_put(), init_get_bits(), FourXContext::last_dc, FourXContext::pre_gb, FourXContext::pre_vlc, read_huffman_tables(), stride, VLC::table, AVCodecContext::width, and width.

Referenced by decode_frame().

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static int decode_i_mb ( FourXContext * f ) [static]

Definition at line 459 of file 4xm.c.

References FourXContext::block, DSPContext::clear_blocks, decode_i_block(), and FourXContext::dsp.

Referenced by decode_i_frame().

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static int decode_init ( AVCodecContext * avctx ) [static]

Definition at line 715 of file 4xm.c.

References common_init(), init_vlcs(), AVCodecContext::pix_fmt, PIX_FMT_RGB565, and AVCodecContext::priv_data.

Referenced by decode_init_mp3on4().

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static void decode_p_block	(	FourXContext *	f,
		uint16_t *	dst,
		uint16_t *	src,
		int	log2w,
		int	log2h,
		int	stride
	)			`[static]`

Definition at line 281 of file 4xm.c.

References BLOCK_TYPE_VLC_BITS, FourXContext::bytestream, FourXContext::gb, get_vlc2(), le2me_16, mcdc(), FourXContext::mv, size2index, VLC::table, and FourXContext::wordstream.

Referenced by decode_p_frame().

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static int decode_p_frame	(	FourXContext *	f,
		uint8_t *	buf,
		int	length
	)			`[static]`

Definition at line 319 of file 4xm.c.

References av_fast_realloc(), av_log(), AV_LOG_ERROR, FourXContext::avctx, FourXContext::bitstream_buffer, FourXContext::bitstream_buffer_size, DSPContext::bswap_buf, FourXContext::bytestream, FourXContext::current_picture, decode_p_block(), FourXContext::dsp, FF_INPUT_BUFFER_PADDING_SIZE, FourXContext::gb, get32(), get_bits_count(), AVCodecContext::height, height, init_get_bits(), init_mv(), FourXContext::last_picture, src, stride, AVCodecContext::width, width, and FourXContext::wordstream.

Referenced by decode_frame().

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static int get32 ( void * p ) [static]

Definition at line 315 of file 4xm.c.

References le2me_32.

Referenced by decode_frame(), decode_i_frame(), and decode_p_frame().

static void idct ( DCTELEM block[64] ) [static]

Definition at line 138 of file 4xm.c.

References FIX_1_082392200, FIX_1_414213562, FIX_1_847759065, FIX_2_613125930, and MULTIPLY.

static void idct_put	(	FourXContext *	f,
		int	x,
		int	y
	)			`[inline, static]`

Definition at line 415 of file 4xm.c.

References FourXContext::avctx, FourXContext::block, cb, CODEC_FLAG_GRAY, FourXContext::current_picture, AVCodecContext::flags, idct, and stride.

Referenced by decode_frame(), decode_i_frame(), dsputil_init_sh4(), and dv_decode_video_segment().

static void init_mv ( FourXContext * f ) [static]

Definition at line 232 of file 4xm.c.

References FourXContext::current_picture, mv, and FourXContext::mv.

Referenced by decode_p_frame().

static void init_vlcs ( FourXContext * f ) [static]

Definition at line 222 of file 4xm.c.

References block_type_tab, BLOCK_TYPE_VLC_BITS, and init_vlc().

Referenced by decode_init(), and mpeg_decode_init().

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static void mcdc	(	uint16_t *	dst,
		uint16_t *	src,
		int	log2w,
		int	h,
		int	stride,
		int	scale,
		int	dc
	)			`[inline, static]`

Definition at line 240 of file 4xm.c.

Referenced by decode_p_block().

static uint8_t* read_huffman_tables	(	FourXContext *	f,
		uint8_t *const	buf
	)			`[static]`

Definition at line 472 of file 4xm.c.

References ACDC_VLC_BITS, av_log(), AV_LOG_ERROR, FourXContext::avctx, bits, init_vlc(), and FourXContext::pre_vlc.

Referenced by decode_frame(), decode_i_frame(), and decode_init().

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Variable Documentation

const uint8_t block_type_tab[4][8][2] [static]

Initial value:

{
  {   
    { 0,1}, { 2,2}, { 6,3}, {14,4}, {30,5}, {31,5}, { 0,0}
  },{ 
    { 0,1}, { 0,0}, { 2,2}, { 6,3}, {14,4}, {15,4}, { 0,0}
  },{ 
    { 0,1}, { 2,2}, { 0,0}, { 6,3}, {14,4}, {15,4}, { 0,0}
  },{ 
    { 0,1}, { 0,0}, { 0,0}, { 2,2}, { 6,3}, {14,4}, {15,4}
  }
}

Definition at line 37 of file 4xm.c.

Referenced by init_vlcs().

VLC block_type_vlc[4] [static]

Definition at line 103 of file 4xm.c.

const uint8_t dequant_table[64] [static]

Initial value:

{
 16, 15, 13, 19, 24, 31, 28, 17,
 17, 23, 25, 31, 36, 63, 45, 21,
 18, 24, 27, 37, 52, 59, 49, 20,
 16, 28, 34, 40, 60, 80, 51, 20,
 18, 31, 48, 66, 68, 86, 56, 21,
 19, 38, 56, 59, 64, 64, 48, 20,
 27, 48, 55, 55, 56, 51, 35, 15,
 20, 35, 34, 32, 31, 22, 15,  8,
}

Definition at line 92 of file 4xm.c.

Referenced by decode_i_block().

AVCodec fourxm_decoder

Initial value:

 {
    "4xm",
    CODEC_TYPE_VIDEO,
    CODEC_ID_4XM,
    sizeof(FourXContext),
    decode_init,
    NULL,
    decode_end,
    decode_frame,
    
}

Definition at line 742 of file 4xm.c.

Referenced by avcodec_register_all().

const int8_t mv[256][2] [static]

Definition at line 56 of file 4xm.c.

Referenced by ff_print_debug_info(), init_mv(), pred_direct_motion(), svq1_motion_inter_4v_block(), svq1_motion_inter_block(), and svq3_mc_dir().

const uint8_t size2index[4][4] [static]

Initial value:

{
  {-1, 3, 1, 1},
  { 3, 0, 0, 0},
  { 2, 0, 0, 0},
  { 2, 0, 0, 0},
}

Definition at line 49 of file 4xm.c.

Referenced by decode_p_block().


Data Structures
struct	CFrameBuffer
struct	FourXContext
Defines
#define	BLOCK_TYPE_VLC_BITS 5
#define	ACDC_VLC_BITS 9
#define	CFRAME_BUFFER_COUNT 100
#define	FIX_1_082392200 70936
#define	FIX_1_414213562 92682
#define	FIX_1_847759065 121095
#define	FIX_2_613125930 171254
#define	MULTIPLY(var, const) (((var)*(const)) >> 16)
Functions
static void	idct (DCTELEM block[64])
static void	init_vlcs (FourXContext *f)
static void	init_mv (FourXContext *f)
static void	mcdc (uint16_t dst, uint16_t src, int log2w, int h, int stride, int scale, int dc)
static void	decode_p_block (FourXContext f, uint16_t dst, uint16_t *src, int log2w, int log2h, int stride)
static int	get32 (void *p)
static int	decode_p_frame (FourXContext f, uint8_t buf, int length)
static int	decode_i_block (FourXContext f, DCTELEM block)
static void	idct_put (FourXContext *f, int x, int y)
static int	decode_i_mb (FourXContext *f)
static uint8_t *	read_huffman_tables (FourXContext f, uint8_t const buf)
static int	decode_i_frame (FourXContext f, uint8_t buf, int length)
static int	decode_frame (AVCodecContext avctx, void data, int data_size, uint8_t buf, int buf_size)
static void	common_init (AVCodecContext *avctx)
static int	decode_init (AVCodecContext *avctx)
static int	decode_end (AVCodecContext *avctx)
Variables
static const uint8_t	block_type_tab [4][8][2]
static const uint8_t	size2index [4][4]
static const int8_t	mv [256][2]
static const uint8_t	dequant_table [64]
static VLC	block_type_vlc [4]
AVCodec	fourxm_decoder