FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
truemotion2.c File Reference

Duck TrueMotion2 decoder. More...

#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

#define TM2_ESCAPE   0x80000000

Definition at line 35 of file truemotion2.c.

Referenced by tm2_read_stream().

#define TM2_DELTAS   64

Definition at line 36 of file truemotion2.c.

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

#define TM2_OLD_HEADER_MAGIC   0x00000100

Definition at line 248 of file truemotion2.c.

Referenced by tm2_read_header().

#define TM2_NEW_HEADER_MAGIC   0x00000101

Definition at line 249 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;
#define U(x)
Definition: vp56_arith.h:37
#define Y
Definition: boxblur.h:38
AVFormatContext * ctx
Definition: movenc.c:48
int
#define V
Definition: avdct.c:30

Definition at line 431 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;\
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;
AVFormatContext * ctx
Definition: movenc.c:48
#define TM2_INIT_POINTERS()
Definition: truemotion2.c:431
int

Definition at line 445 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] = (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];}
int
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:104

Definition at line 458 of file truemotion2.c.

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

#define TM2_HEADER_SIZE   40

Definition at line 897 of file truemotion2.c.

Referenced by decode_frame().

Enumeration Type Documentation

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.

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

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().

static int tm2_build_huff_table ( TM2Context ctx,
TM2Codes code 
)
static

Definition at line 150 of file truemotion2.c.

Referenced by tm2_read_stream().

static void tm2_free_codes ( TM2Codes code)
static

Definition at line 232 of file truemotion2.c.

Referenced by tm2_read_stream().

static int tm2_get_token ( GetBitContext gb,
TM2Codes code 
)
inlinestatic

Definition at line 239 of file truemotion2.c.

Referenced by tm2_read_stream().

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

Definition at line 251 of file truemotion2.c.

Referenced by decode_frame().

static int tm2_read_deltas ( TM2Context ctx,
int  stream_id 
)
static

Definition at line 268 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 295 of file truemotion2.c.

Referenced by decode_frame().

static int GET_TOK ( TM2Context ctx,
int  type 
)
inlinestatic
static void tm2_apply_deltas ( TM2Context ctx,
int Y,
int  stride,
int deltas,
int last 
)
inlinestatic
static void tm2_high_chroma ( int data,
int  stride,
int last,
unsigned *  CD,
int deltas 
)
inlinestatic

Definition at line 483 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,
unsigned *  CD,
int deltas,
int  bx 
)
inlinestatic

Definition at line 496 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 515 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 536 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 558 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 599 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 646 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 681 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 721 of file truemotion2.c.

Referenced by tm2_decode_blocks().

static int tm2_decode_blocks ( TM2Context ctx,
AVFrame p 
)
static

Definition at line 775 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 899 of file truemotion2.c.

static av_cold int decode_init ( AVCodecContext avctx)
static

Definition at line 957 of file truemotion2.c.

static av_cold int decode_end ( AVCodecContext avctx)
static

Definition at line 1021 of file truemotion2.c.

Variable Documentation

const int tm2_stream_order[TM2_NUM_STREAMS]
static
Initial value:

Definition at line 893 of file truemotion2.c.

Referenced by decode_frame().

AVCodec ff_truemotion2_decoder
Initial value:
= {
.name = "truemotion2",
.long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
.priv_data_size = sizeof(TM2Context),
.close = decode_end,
.capabilities = AV_CODEC_CAP_DR1,
}
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static av_cold int decode_end(AVCodecContext *avctx)
Definition: truemotion2.c:1021
static av_cold int decode_init(AVCodecContext *avctx)
Definition: truemotion2.c:957
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:984
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: truemotion2.c:899

Definition at line 1046 of file truemotion2.c.