libavcodec/truemotion2.c File Reference

Duck TrueMotion2 decoder. More...

#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "dsputil.h"

Go to the source code of this file.

Data Structures

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

Defines

#define TM2_ESCAPE   0x80000000
#define TM2_DELTAS   64
#define TM2_INIT_POINTERS()
#define TM2_INIT_POINTERS_2()
#define TM2_RECALC_BLOCK(CHR, stride, last, CD)

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
}

Functions

static int tm2_read_tree (TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
static int tm2_build_huff_table (TM2Context *ctx, TM2Codes *code)
static void tm2_free_codes (TM2Codes *code)
static int tm2_get_token (GetBitContext *gb, TM2Codes *code)
static int tm2_read_header (TM2Context *ctx, const uint8_t *buf)
static int tm2_read_deltas (TM2Context *ctx, int stream_id)
static int tm2_read_stream (TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
static int GET_TOK (TM2Context *ctx, int type)
static void tm2_apply_deltas (TM2Context *ctx, int *Y, int stride, int *deltas, int *last)
static void tm2_high_chroma (int *data, int stride, int *last, int *CD, int *deltas)
static void tm2_low_chroma (int *data, int stride, int *clast, int *CD, int *deltas, int bx)
static void tm2_hi_res_block (TM2Context *ctx, AVFrame *pic, int bx, int by)
static void tm2_med_res_block (TM2Context *ctx, AVFrame *pic, int bx, int by)
static void tm2_low_res_block (TM2Context *ctx, AVFrame *pic, int bx, int by)
static void tm2_null_res_block (TM2Context *ctx, AVFrame *pic, int bx, int by)
static void tm2_still_block (TM2Context *ctx, AVFrame *pic, int bx, int by)
static void tm2_update_block (TM2Context *ctx, AVFrame *pic, int bx, int by)
static void tm2_motion_block (TM2Context *ctx, AVFrame *pic, int bx, int by)
static int tm2_decode_blocks (TM2Context *ctx, AVFrame *p)
static int decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
static av_cold int decode_init (AVCodecContext *avctx)
static av_cold int decode_end (AVCodecContext *avctx)

Variables

static const int tm2_stream_order [TM2_NUM_STREAMS]
AVCodec ff_truemotion2_decoder

Detailed Description

Duck TrueMotion2 decoder.

Definition in file truemotion2.c.

Define Documentation

#define TM2_DELTAS   64

Definition at line 33 of file truemotion2.c.

Referenced by GET_TOK(), tm2_read_deltas(), and tm2_read_stream().

#define TM2_ESCAPE   0x80000000

Definition at line 32 of file truemotion2.c.

Referenced by tm2_read_stream().

 
#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;

Definition at line 372 of file truemotion2.c.

Referenced by tm2_hi_res_block(), tm2_low_res_block(), tm2_med_res_block(), and tm2_null_res_block().

 
#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;

Definition at line 386 of file truemotion2.c.

Referenced by tm2_motion_block(), tm2_still_block(), and tm2_update_block().

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

Value:

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

Definition at line 399 of file truemotion2.c.

Referenced by tm2_motion_block(), tm2_still_block(), and tm2_update_block().

Enumeration Type Documentation

enum TM2_BLOCKS

Enumerator:
TM2_HI_RES 
TM2_MED_RES 
TM2_LOW_RES 
TM2_NULL_RES 
TM2_UPDATE 
TM2_STILL 
TM2_MOTION 

Definition at line 38 of file truemotion2.c.

enum TM2_STREAMS

Enumerator:
TM2_C_HI 
TM2_C_LO 
TM2_L_HI 
TM2_L_LO 
TM2_UPD 
TM2_MOT 
TM2_TYPE 
TM2_NUM_STREAMS 

Definition at line 35 of file truemotion2.c.

Function Documentation

static av_cold int decode_end ( AVCodecContext *  avctx  )  [static]

Definition at line 945 of file truemotion2.c.

static int decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  data_size,
AVPacket *  avpkt 
) [static]

Definition at line 831 of file truemotion2.c.

static av_cold int decode_init ( AVCodecContext *  avctx  )  [static]

Definition at line 885 of file truemotion2.c.

static int GET_TOK ( TM2Context *  ctx,
int  type 
) [inline, static]

Definition at line 354 of file truemotion2.c.

Referenced by tm2_decode_blocks(), tm2_hi_res_block(), tm2_low_res_block(), tm2_med_res_block(), tm2_motion_block(), and tm2_update_block().

static void tm2_apply_deltas ( TM2Context *  ctx,
int *  Y,
int  stride,
int *  deltas,
int *  last 
) [inline, static]

Definition at line 406 of file truemotion2.c.

Referenced by tm2_hi_res_block(), tm2_low_res_block(), tm2_med_res_block(), and tm2_null_res_block().

static int tm2_build_huff_table ( TM2Context *  ctx,
TM2Codes *  code 
) [static]

Definition at line 123 of file truemotion2.c.

Referenced by tm2_read_stream().

static int tm2_decode_blocks ( TM2Context *  ctx,
AVFrame *  p 
) [static]

Definition at line 711 of file truemotion2.c.

Referenced by decode_frame().

static void tm2_free_codes ( TM2Codes *  code  )  [static]

Definition at line 192 of file truemotion2.c.

Referenced by tm2_read_stream().

static int tm2_get_token ( GetBitContext *  gb,
TM2Codes *  code 
) [inline, static]

Definition at line 199 of file truemotion2.c.

Referenced by tm2_read_stream().

static void tm2_hi_res_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
) [inline, static]

Definition at line 456 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static void tm2_high_chroma ( int *  data,
int  stride,
int *  last,
int *  CD,
int *  deltas 
) [inline, static]

Definition at line 424 of file truemotion2.c.

Referenced by tm2_hi_res_block(), and tm2_low_chroma().

static void tm2_low_chroma ( int *  data,
int  stride,
int *  clast,
int *  CD,
int *  deltas,
int  bx 
) [inline, static]

Definition at line 437 of file truemotion2.c.

Referenced by tm2_low_res_block(), tm2_med_res_block(), and tm2_null_res_block().

static void tm2_low_res_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
) [inline, static]

Definition at line 499 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static void tm2_med_res_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
) [inline, static]

Definition at line 477 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static void tm2_motion_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
) [inline, static]

Definition at line 659 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static void tm2_null_res_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
) [inline, static]

Definition at line 540 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static int tm2_read_deltas ( TM2Context *  ctx,
int  stream_id 
) [static]

Definition at line 229 of file truemotion2.c.

Referenced by tm2_read_stream().

static int tm2_read_header ( TM2Context *  ctx,
const uint8_t *  buf 
) [inline, static]

Definition at line 206 of file truemotion2.c.

Referenced by decode_frame().

static int tm2_read_stream ( TM2Context *  ctx,
const uint8_t *  buf,
int  stream_id,
int  buf_size 
) [static]

Definition at line 254 of file truemotion2.c.

Referenced by decode_frame().

static int tm2_read_tree ( TM2Context *  ctx,
uint32_t  prefix,
int  length,
TM2Huff *  huff 
) [static]

Definition at line 94 of file truemotion2.c.

Referenced by tm2_build_huff_table().

static void tm2_still_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
) [inline, static]

Definition at line 586 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static void tm2_update_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
) [inline, static]

Definition at line 621 of file truemotion2.c.

Referenced by tm2_decode_blocks().

Variable Documentation

AVCodec ff_truemotion2_decoder

Initial value:

 {
    .name           = "truemotion2",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_TRUEMOTION2,
    .priv_data_size = sizeof(TM2Context),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .long_name      = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
}

Definition at line 971 of file truemotion2.c.

const int tm2_stream_order[TM2_NUM_STREAMS] [static]

Initial value:

 {
    TM2_C_HI, TM2_C_LO, TM2_L_HI, TM2_L_LO, TM2_UPD, TM2_MOT, TM2_TYPE
}

Definition at line 827 of file truemotion2.c.

Referenced by decode_frame().

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