truemotion2.c File Reference

Duck TrueMotion2 decoder. More...

#include <inttypes.h>
#include "avcodec.h"
#include "bswapdsp.h"
#include "bytestream.h"
#include "get_bits.h"
#include "internal.h"

Classes
struct	TM2Context
struct	TM2Codes
	Huffman codes for each of streams. More...
struct	TM2Huff
	structure for gathering Huffman codes information More...

Macros
#define	TM2_ESCAPE   0x80000000
#define	TM2_DELTAS   64
#define	TM2_OLD_HEADER_MAGIC   0x00000100
#define	TM2_NEW_HEADER_MAGIC   0x00000101
#define	TM2_INIT_POINTERS()
#define	TM2_INIT_POINTERS_2()
#define	TM2_RECALC_BLOCK(CHR, stride, last, CD)
#define	TM2_HEADER_SIZE   40

Typedefs
typedef struct TM2Context	TM2Context
typedef struct TM2Codes	TM2Codes
	Huffman codes for each of streams.
typedef struct TM2Huff	TM2Huff
	structure for gathering Huffman codes information

Enumerations
enum	TM2_STREAMS {   TM2_C_HI = 0, TM2_C_LO, TM2_L_HI, TM2_L_LO,   TM2_UPD, TM2_MOT, TM2_TYPE, TM2_NUM_STREAMS }
enum	TM2_BLOCKS {   TM2_HI_RES = 0, TM2_MED_RES, TM2_LOW_RES, TM2_NULL_RES,   TM2_UPDATE, TM2_STILL, TM2_MOTION }

Variables
AVCodec	ff_truemotion2_decoder

Detailed Description

Duck TrueMotion2 decoder.

Macro Definition Documentation

TM2_INIT_POINTERS

#define TM2_INIT_POINTERS

(

)

Value:

int *last, *clast; \
    int *Y, *U, *V;\
    int Ystride, Ustride, Vstride;\
\
    Ystride = ctx->y_stride;\
    Vstride = ctx->uv_stride;\
    Ustride = ctx->uv_stride;\
    Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
    V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
    U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
    last = ctx->last + bx * 4;\
    clast = ctx->clast + bx * 4;

TM2_INIT_POINTERS_2

#define TM2_INIT_POINTERS_2

(

)

Value:

int *Yo, *Uo, *Vo;\
    int oYstride, oUstride, oVstride;\
\
    TM2_INIT_POINTERS();\
    oYstride = Ystride;\
    oVstride = Vstride;\
    oUstride = Ustride;\
    Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
    Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
    Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;

TM2_RECALC_BLOCK

#define TM2_RECALC_BLOCK	(		CHR,
			stride,
			last,
			CD
	)

Value:

{\
    CD[0] = (unsigned)CHR[         1] - (unsigned)last[1];\
    CD[1] = (unsigned)CHR[stride + 1] - (unsigned) CHR[1];\
    last[0] = (int)CHR[stride + 0];\
    last[1] = (int)CHR[stride + 1];}

Variable Documentation

ff_truemotion2_decoder

AVCodec ff_truemotion2_decoder

Initial value:

= {
    .name           = "truemotion2",
    .long_name      = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_TRUEMOTION2,
    .priv_data_size = sizeof(TM2Context),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
}