Duck TrueMotion2 decoder. More...

#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"

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.

Referenced by tm2_read_stream().

◆ TM2_DELTAS

#define TM2_DELTAS 64

Definition at line 38 of file truemotion2.c.

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

◆ TM2_OLD_HEADER_MAGIC

#define TM2_OLD_HEADER_MAGIC 0x00000100

Definition at line 238 of file truemotion2.c.

Referenced by tm2_read_header().

◆ TM2_NEW_HEADER_MAGIC

#define TM2_NEW_HEADER_MAGIC 0x00000101

Definition at line 239 of file truemotion2.c.

Referenced by tm2_read_header().

◆ 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.

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

◆ 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.

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

◆ 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.

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

◆ TM2_HEADER_SIZE

#define TM2_HEADER_SIZE 40

Definition at line 887 of file truemotion2.c.

Referenced by decode_frame().

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(), and tm2_read_tree().

◆ 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.

Data Structures

Macros

Enumerations

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ TM2_ESCAPE

◆ TM2_DELTAS

◆ TM2_OLD_HEADER_MAGIC

◆ TM2_NEW_HEADER_MAGIC

◆ TM2_INIT_POINTERS

◆ TM2_INIT_POINTERS_2

◆ TM2_RECALC_BLOCK

◆ TM2_HEADER_SIZE

Enumeration Type Documentation

◆ TM2_STREAMS

◆ TM2_BLOCKS

Function Documentation

◆ tm2_read_tree()

◆ tm2_build_huff_table()

◆ tm2_free_codes()

◆ tm2_get_token()

◆ tm2_read_header()

◆ tm2_read_deltas()

◆ tm2_read_stream()

◆ GET_TOK()

◆ tm2_apply_deltas()

◆ tm2_high_chroma()

◆ tm2_low_chroma()

◆ tm2_hi_res_block()

◆ tm2_med_res_block()

◆ tm2_low_res_block()

◆ tm2_null_res_block()

◆ tm2_still_block()

◆ tm2_update_block()

◆ tm2_motion_block()

◆ tm2_decode_blocks()

◆ decode_frame()

◆ decode_init()

◆ decode_end()

Variable Documentation

◆ tm2_stream_order

◆ ff_truemotion2_decoder