truemotion2.c File Reference

#include <inttypes.h>
#include "libavutil/mem.h"
#include "avcodec.h"
#include "bswapdsp.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.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, 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, unsigned *CD, int *deltas)
static void	tm2_low_chroma (int *data, int stride, int *clast, unsigned *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, AVFrame *rframe, 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]
const FFCodec	ff_truemotion2_decoder

Detailed Description

Duck TrueMotion2 decoder.

Definition in file truemotion2.c.

Macro Definition Documentation

TM2_ESCAPE

#define TM2_ESCAPE   0x80000000

Definition at line 37 of file truemotion2.c.

TM2_DELTAS

#define TM2_DELTAS   64

Definition at line 38 of file truemotion2.c.

TM2_OLD_HEADER_MAGIC

#define TM2_OLD_HEADER_MAGIC   0x00000100

Definition at line 238 of file truemotion2.c.

TM2_NEW_HEADER_MAGIC

#define TM2_NEW_HEADER_MAGIC   0x00000101

Definition at line 239 of file truemotion2.c.

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;

Definition at line 421 of file truemotion2.c.

TM2_INIT_POINTERS_2

#define TM2_INIT_POINTERS_2

(

)

Value:

    unsigned *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 435 of file truemotion2.c.

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];}

Definition at line 448 of file truemotion2.c.

TM2_HEADER_SIZE

#define TM2_HEADER_SIZE   40

Definition at line 887 of file truemotion2.c.

Enumeration Type Documentation

TM2_STREAMS

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 41 of file truemotion2.c.

TM2_BLOCKS

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 53 of file truemotion2.c.

Function Documentation

tm2_read_tree()

static int tm2_read_tree ( TM2Context *  ctx, int  length, TM2Huff *  huff  )

static

Returns

the length of the longest code or an AVERROR code

Definition at line 120 of file truemotion2.c.

Referenced by tm2_build_huff_table().

tm2_build_huff_table()

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

static

Definition at line 150 of file truemotion2.c.

Referenced by tm2_read_stream().

tm2_free_codes()

static void tm2_free_codes ( TM2Codes *  code )

static

Definition at line 223 of file truemotion2.c.

Referenced by tm2_read_stream().

tm2_get_token()

static int tm2_get_token ( GetBitContext *  gb, TM2Codes *  code  )

inlinestatic

Definition at line 229 of file truemotion2.c.

Referenced by tm2_read_stream().

tm2_read_header()

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

inlinestatic

Definition at line 241 of file truemotion2.c.

Referenced by decode_frame().

tm2_read_deltas()

static int tm2_read_deltas ( TM2Context *  ctx, int  stream_id  )

static

Definition at line 258 of file truemotion2.c.

Referenced by tm2_read_stream().

tm2_read_stream()

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

static

Definition at line 285 of file truemotion2.c.

Referenced by decode_frame().

GET_TOK()

static int GET_TOK ( TM2Context *  ctx, int  type  )

inlinestatic

Definition at line 401 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().

tm2_apply_deltas()

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

inlinestatic

Definition at line 455 of file truemotion2.c.

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

tm2_high_chroma()

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

inlinestatic

Definition at line 473 of file truemotion2.c.

Referenced by tm2_hi_res_block(), and tm2_low_chroma().

tm2_low_chroma()

static void tm2_low_chroma ( int *  data, int  stride, int *  clast, unsigned *  CD, int *  deltas, int  bx  )

inlinestatic

Definition at line 486 of file truemotion2.c.

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

tm2_hi_res_block()

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

inlinestatic

Definition at line 505 of file truemotion2.c.

Referenced by tm2_decode_blocks().

tm2_med_res_block()

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

inlinestatic

Definition at line 526 of file truemotion2.c.

Referenced by tm2_decode_blocks().

tm2_low_res_block()

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

inlinestatic

Definition at line 548 of file truemotion2.c.

Referenced by tm2_decode_blocks().

tm2_null_res_block()

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

inlinestatic

Definition at line 589 of file truemotion2.c.

Referenced by tm2_decode_blocks().

tm2_still_block()

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

inlinestatic

Definition at line 636 of file truemotion2.c.

Referenced by tm2_decode_blocks().

tm2_update_block()

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

inlinestatic

Definition at line 671 of file truemotion2.c.

Referenced by tm2_decode_blocks().

tm2_motion_block()

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

inlinestatic

Definition at line 711 of file truemotion2.c.

Referenced by tm2_decode_blocks().

tm2_decode_blocks()

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

static

Definition at line 765 of file truemotion2.c.

Referenced by decode_frame().

decode_frame()

static int decode_frame ( AVCodecContext *  avctx, AVFrame *  rframe, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 889 of file truemotion2.c.

decode_init()

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 948 of file truemotion2.c.

decode_end()

static av_cold int decode_end ( AVCodecContext *  avctx )

static

Definition at line 994 of file truemotion2.c.

Variable Documentation

tm2_stream_order

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 883 of file truemotion2.c.

Referenced by decode_frame().

ff_truemotion2_decoder

const FFCodec ff_truemotion2_decoder

Initial value:

= {
    .p.name         = "truemotion2",
    CODEC_LONG_NAME("Duck TrueMotion 2.0"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_TRUEMOTION2,
    .priv_data_size = sizeof(TM2Context),
    .init           = decode_init,
    .close          = decode_end,
    FF_CODEC_DECODE_CB(decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 1013 of file truemotion2.c.