truemotion2.c File Reference

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

TM2_ESCAPE

#define TM2_ESCAPE   0x80000000

Definition at line 35 of file truemotion2.c.

TM2_DELTAS

#define TM2_DELTAS   64

Definition at line 36 of file truemotion2.c.

TM2_OLD_HEADER_MAGIC

#define TM2_OLD_HEADER_MAGIC   0x00000100

Definition at line 241 of file truemotion2.c.

TM2_NEW_HEADER_MAGIC

#define TM2_NEW_HEADER_MAGIC   0x00000101

Definition at line 242 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 424 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 438 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 451 of file truemotion2.c.

TM2_HEADER_SIZE

#define TM2_HEADER_SIZE   40

Definition at line 890 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 39 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 51 of file truemotion2.c.

Function Documentation

tm2_read_tree()

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

static

Returns

the length of the longest code or an AVERROR code

Definition at line 119 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 225 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 232 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 244 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 261 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 288 of file truemotion2.c.

Referenced by decode_frame().

GET_TOK()

static int GET_TOK ( TM2Context *  ctx, int  type  )

inlinestatic

Definition at line 404 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 458 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 476 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 489 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 508 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 529 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 551 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 592 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 639 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 674 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 714 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 768 of file truemotion2.c.

Referenced by decode_frame().

decode_frame()

static int decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 892 of file truemotion2.c.

decode_init()

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 950 of file truemotion2.c.

decode_end()

static av_cold int decode_end ( AVCodecContext *  avctx )

static

Definition at line 1014 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 886 of file truemotion2.c.

Referenced by decode_frame().

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,
}

Definition at line 1039 of file truemotion2.c.