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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...
 

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
 

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 *got_frame, 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.

Macro Definition Documentation

#define TM2_ESCAPE   0x80000000

Definition at line 32 of file truemotion2.c.

Referenced by tm2_read_stream().

#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_OLD_HEADER_MAGIC   0x00000100

Definition at line 208 of file truemotion2.c.

Referenced by tm2_read_header().

#define TM2_NEW_HEADER_MAGIC   0x00000101

Definition at line 209 of file truemotion2.c.

Referenced by tm2_read_header().

#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 370 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 384 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 397 of file truemotion2.c.

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

#define TM2_HEADER_SIZE   40

Definition at line 829 of file truemotion2.c.

Referenced by decode_frame().

Enumeration Type Documentation

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.

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.

Function Documentation

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

Definition at line 123 of file truemotion2.c.

Referenced by tm2_read_stream().

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 
)
inlinestatic

Definition at line 199 of file truemotion2.c.

Referenced by tm2_read_stream().

static int tm2_read_header ( TM2Context *  ctx,
const uint8_t *  buf 
)
inlinestatic

Definition at line 211 of file truemotion2.c.

Referenced by decode_frame().

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

Definition at line 227 of file truemotion2.c.

Referenced by tm2_read_stream().

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

Definition at line 252 of file truemotion2.c.

Referenced by decode_frame().

static int GET_TOK ( TM2Context *  ctx,
int  type 
)
inlinestatic

Definition at line 352 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 
)
inlinestatic

Definition at line 404 of file truemotion2.c.

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

static void tm2_high_chroma ( int *  data,
int  stride,
int *  last,
int *  CD,
int *  deltas 
)
inlinestatic

Definition at line 422 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 
)
inlinestatic

Definition at line 435 of file truemotion2.c.

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

static void tm2_hi_res_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
)
inlinestatic

Definition at line 454 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static void tm2_med_res_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
)
inlinestatic

Definition at line 475 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static void tm2_low_res_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
)
inlinestatic

Definition at line 497 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static void tm2_null_res_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
)
inlinestatic

Definition at line 538 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static void tm2_still_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
)
inlinestatic

Definition at line 584 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static void tm2_update_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
)
inlinestatic

Definition at line 619 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static void tm2_motion_block ( TM2Context *  ctx,
AVFrame *  pic,
int  bx,
int  by 
)
inlinestatic

Definition at line 657 of file truemotion2.c.

Referenced by tm2_decode_blocks().

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

Definition at line 709 of file truemotion2.c.

Referenced by decode_frame().

static int decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  got_frame,
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 av_cold int decode_end ( AVCodecContext *  avctx)
static

Definition at line 945 of file truemotion2.c.

Variable Documentation

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 825 of file truemotion2.c.

Referenced by decode_frame().

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.

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