truemotion1.c File Reference

Duck TrueMotion v1 Video Decoder by Alex Beregszaszi and Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t) More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "avcodec.h"
#include "internal.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "truemotion1data.h"

Go to the source code of this file.

Data Structures
struct	TrueMotion1Context
struct	frame_header
struct	comp_types

Macros
#define	FLAG_SPRITE   32
#define	FLAG_KEYFRAME   16
#define	FLAG_INTERFRAME   8
#define	FLAG_INTERPOLATED   4
#define	ALGO_NOP   0
#define	ALGO_RGB16V   1
#define	ALGO_RGB16H   2
#define	ALGO_RGB24H   3
#define	BLOCK_2x2   0
#define	BLOCK_2x4   1
#define	BLOCK_4x2   2
#define	BLOCK_4x4   3
#define	GET_NEXT_INDEX()
#define	INC_INDEX
#define	APPLY_C_PREDICTOR()
#define	APPLY_C_PREDICTOR_24()
#define	APPLY_Y_PREDICTOR()
#define	APPLY_Y_PREDICTOR_24()
#define	OUTPUT_PIXEL_PAIR()

Functions
static void	select_delta_tables (TrueMotion1Context *s, int delta_table_index)
static int	make_ydt15_entry (int p1, int p2, int16_t *ydt)
static int	make_cdt15_entry (int p1, int p2, int16_t *cdt)
static int	make_ydt16_entry (int p1, int p2, int16_t *ydt)
static int	make_cdt16_entry (int p1, int p2, int16_t *cdt)
static int	make_ydt24_entry (int p1, int p2, int16_t *ydt)
static int	make_cdt24_entry (int p1, int p2, int16_t *cdt)
static void	gen_vector_table15 (TrueMotion1Context *s, const uint8_t *sel_vector_table)
static void	gen_vector_table16 (TrueMotion1Context *s, const uint8_t *sel_vector_table)
static void	gen_vector_table24 (TrueMotion1Context *s, const uint8_t *sel_vector_table)
static int	truemotion1_decode_header (TrueMotion1Context *s)
static av_cold int	truemotion1_decode_init (AVCodecContext *avctx)
static void	truemotion1_decode_16bit (TrueMotion1Context *s)
static void	truemotion1_decode_24bit (TrueMotion1Context *s)
static int	truemotion1_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	truemotion1_decode_end (AVCodecContext *avctx)

Variables
static const comp_types	compression_types [17]
AVCodec	ff_truemotion1_decoder

Detailed Description

Duck TrueMotion v1 Video Decoder by Alex Beregszaszi and Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t)

The TrueMotion v1 decoder presently only decodes 16-bit TM1 data and outputs RGB555 (or RGB565) data. 24-bit TM1 data is not supported yet.

Definition in file truemotion1.c.

Macro Definition Documentation

FLAG_SPRITE

#define FLAG_SPRITE   32

Definition at line 82 of file truemotion1.c.

Referenced by truemotion1_decode_header().

FLAG_KEYFRAME

#define FLAG_KEYFRAME   16

Definition at line 83 of file truemotion1.c.

Referenced by truemotion1_decode_16bit(), truemotion1_decode_24bit(), and truemotion1_decode_header().

FLAG_INTERFRAME

#define FLAG_INTERFRAME   8

Definition at line 84 of file truemotion1.c.

Referenced by truemotion1_decode_header().

FLAG_INTERPOLATED

#define FLAG_INTERPOLATED   4

Definition at line 85 of file truemotion1.c.

Referenced by truemotion1_decode_header().

ALGO_NOP

#define ALGO_NOP   0

Definition at line 105 of file truemotion1.c.

Referenced by truemotion1_decode_frame().

ALGO_RGB16V

#define ALGO_RGB16V   1

Definition at line 106 of file truemotion1.c.

ALGO_RGB16H

#define ALGO_RGB16H   2

Definition at line 107 of file truemotion1.c.

ALGO_RGB24H

#define ALGO_RGB24H   3

Definition at line 108 of file truemotion1.c.

Referenced by truemotion1_decode_frame(), and truemotion1_decode_header().

BLOCK_2x2

#define BLOCK_2x2   0

Definition at line 111 of file truemotion1.c.

Referenced by truemotion1_decode_16bit(), and truemotion1_decode_24bit().

BLOCK_2x4

#define BLOCK_2x4   1

Definition at line 112 of file truemotion1.c.

BLOCK_4x2

#define BLOCK_4x2   2

Definition at line 113 of file truemotion1.c.

Referenced by truemotion1_decode_16bit(), and truemotion1_decode_24bit().

BLOCK_4x4

#define BLOCK_4x4   3

Definition at line 114 of file truemotion1.c.

GET_NEXT_INDEX

#define GET_NEXT_INDEX

(

)

Value:

{\
    if (index_stream_index >= s->index_stream_size) { \
        av_log(s->avctx, AV_LOG_INFO, " help! truemotion1 decoder went out of bounds\n"); \
        return; \
    } \
    index = s->index_stream[index_stream_index++] * 4; \
}

Definition at line 526 of file truemotion1.c.

Referenced by truemotion1_decode_16bit(), and truemotion1_decode_24bit().

INC_INDEX

#define INC_INDEX

Value:

do {                                                                \
    if (index >= 1023) {                                            \
        av_log(s->avctx, AV_LOG_ERROR, "Invalid index value.\n");   \
        return;                                                     \
    }                                                               \
    index++;                                                        \
} while (0)

Definition at line 535 of file truemotion1.c.

APPLY_C_PREDICTOR

#define APPLY_C_PREDICTOR

(

)

Value:

predictor_pair = s->c_predictor_table[index]; \
    horiz_pred += (predictor_pair >> 1); \
    if (predictor_pair & 1) { \
        GET_NEXT_INDEX() \
        if (!index) { \
            GET_NEXT_INDEX() \
            predictor_pair = s->c_predictor_table[index]; \
            horiz_pred += ((predictor_pair >> 1) * 5); \
            if (predictor_pair & 1) \
                GET_NEXT_INDEX() \
            else \
                INC_INDEX; \
        } \
    } else \
        INC_INDEX;

Definition at line 544 of file truemotion1.c.

Referenced by truemotion1_decode_16bit().

APPLY_C_PREDICTOR_24

#define APPLY_C_PREDICTOR_24

(

)

Value:

predictor_pair = s->c_predictor_table[index]; \
    horiz_pred += (predictor_pair >> 1); \
    if (predictor_pair & 1) { \
        GET_NEXT_INDEX() \
        if (!index) { \
            GET_NEXT_INDEX() \
            predictor_pair = s->fat_c_predictor_table[index]; \
            horiz_pred += (predictor_pair >> 1); \
            if (predictor_pair & 1) \
                GET_NEXT_INDEX() \
            else \
                INC_INDEX; \
        } \
    } else \
        INC_INDEX;

Definition at line 561 of file truemotion1.c.

Referenced by truemotion1_decode_24bit().

APPLY_Y_PREDICTOR

#define APPLY_Y_PREDICTOR

(

)

Value:

predictor_pair = s->y_predictor_table[index]; \
    horiz_pred += (predictor_pair >> 1); \
    if (predictor_pair & 1) { \
        GET_NEXT_INDEX() \
        if (!index) { \
            GET_NEXT_INDEX() \
            predictor_pair = s->y_predictor_table[index]; \
            horiz_pred += ((predictor_pair >> 1) * 5); \
            if (predictor_pair & 1) \
                GET_NEXT_INDEX() \
            else \
                INC_INDEX; \
        } \
    } else \
        INC_INDEX;

Definition at line 579 of file truemotion1.c.

Referenced by truemotion1_decode_16bit().

APPLY_Y_PREDICTOR_24

#define APPLY_Y_PREDICTOR_24

(

)

Value:

predictor_pair = s->y_predictor_table[index]; \
    horiz_pred += (predictor_pair >> 1); \
    if (predictor_pair & 1) { \
        GET_NEXT_INDEX() \
        if (!index) { \
            GET_NEXT_INDEX() \
            predictor_pair = s->fat_y_predictor_table[index]; \
            horiz_pred += (predictor_pair >> 1); \
            if (predictor_pair & 1) \
                GET_NEXT_INDEX() \
            else \
                INC_INDEX; \
        } \
    } else \
        INC_INDEX;

Definition at line 596 of file truemotion1.c.

Referenced by truemotion1_decode_24bit().

OUTPUT_PIXEL_PAIR

#define OUTPUT_PIXEL_PAIR

(

)

Value:

*current_pixel_pair = *vert_pred + horiz_pred; \
    *vert_pred++ = *current_pixel_pair++;

Definition at line 613 of file truemotion1.c.

Referenced by truemotion1_decode_16bit(), and truemotion1_decode_24bit().

Function Documentation

select_delta_tables()

static void select_delta_tables ( TrueMotion1Context *  s, int  delta_table_index  )

static

Definition at line 148 of file truemotion1.c.

Referenced by truemotion1_decode_header().

make_ydt15_entry()

static int make_ydt15_entry ( int  p1, int  p2, int16_t *  ydt  )

static

Definition at line 174 of file truemotion1.c.

Referenced by gen_vector_table15(), and select_delta_tables().

make_cdt15_entry()

static int make_cdt15_entry ( int  p1, int  p2, int16_t *  cdt  )

static

Definition at line 186 of file truemotion1.c.

Referenced by gen_vector_table15().

make_ydt16_entry()

static int make_ydt16_entry ( int  p1, int  p2, int16_t *  ydt  )

static

Definition at line 199 of file truemotion1.c.

Referenced by gen_vector_table16(), and make_cdt15_entry().

make_cdt16_entry()

static int make_cdt16_entry ( int  p1, int  p2, int16_t *  cdt  )

static

Definition at line 211 of file truemotion1.c.

Referenced by gen_vector_table16().

make_ydt24_entry()

static int make_ydt24_entry ( int  p1, int  p2, int16_t *  ydt  )

static

Definition at line 221 of file truemotion1.c.

Referenced by gen_vector_table24().

make_cdt24_entry()

static int make_cdt24_entry ( int  p1, int  p2, int16_t *  cdt  )

static

Definition at line 230 of file truemotion1.c.

Referenced by gen_vector_table24().

gen_vector_table15()

static void gen_vector_table15 ( TrueMotion1Context *  s, const uint8_t *  sel_vector_table  )

static

Definition at line 239 of file truemotion1.c.

Referenced by truemotion1_decode_header().

gen_vector_table16()

static void gen_vector_table16 ( TrueMotion1Context *  s, const uint8_t *  sel_vector_table  )

static

Definition at line 260 of file truemotion1.c.

Referenced by truemotion1_decode_header().

gen_vector_table24()

static void gen_vector_table24 ( TrueMotion1Context *  s, const uint8_t *  sel_vector_table  )

static

Definition at line 281 of file truemotion1.c.

Referenced by truemotion1_decode_header().

truemotion1_decode_header()

static int truemotion1_decode_header ( TrueMotion1Context *  s )

static

Definition at line 310 of file truemotion1.c.

Referenced by truemotion1_decode_frame().

truemotion1_decode_init()

static av_cold int truemotion1_decode_init ( AVCodecContext *  avctx )

static

Definition at line 473 of file truemotion1.c.

truemotion1_decode_16bit()

static void truemotion1_decode_16bit ( TrueMotion1Context *  s )

static

Definition at line 617 of file truemotion1.c.

Referenced by truemotion1_decode_frame().

truemotion1_decode_24bit()

static void truemotion1_decode_24bit ( TrueMotion1Context *  s )

static

Definition at line 744 of file truemotion1.c.

Referenced by truemotion1_decode_frame().

truemotion1_decode_frame()

static int truemotion1_decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 871 of file truemotion1.c.

truemotion1_decode_end()

static av_cold int truemotion1_decode_end ( AVCodecContext *  avctx )

static

Definition at line 903 of file truemotion1.c.

Variable Documentation

compression_types

const comp_types compression_types[17]

static

Initial value:

= {
    { ALGO_NOP,    0, 0, 0 },

    { ALGO_RGB16V, 4, 4, BLOCK_4x4 },
    { ALGO_RGB16H, 4, 4, BLOCK_4x4 },
    { ALGO_RGB16V, 4, 2, BLOCK_4x2 },
    { ALGO_RGB16H, 4, 2, BLOCK_4x2 },

    { ALGO_RGB16V, 2, 4, BLOCK_2x4 },
    { ALGO_RGB16H, 2, 4, BLOCK_2x4 },
    { ALGO_RGB16V, 2, 2, BLOCK_2x2 },
    { ALGO_RGB16H, 2, 2, BLOCK_2x2 },

    { ALGO_NOP,    4, 4, BLOCK_4x4 },
    { ALGO_RGB24H, 4, 4, BLOCK_4x4 },
    { ALGO_NOP,    4, 2, BLOCK_4x2 },
    { ALGO_RGB24H, 4, 2, BLOCK_4x2 },

    { ALGO_NOP,    2, 4, BLOCK_2x4 },
    { ALGO_RGB24H, 2, 4, BLOCK_2x4 },
    { ALGO_NOP,    2, 2, BLOCK_2x2 },
    { ALGO_RGB24H, 2, 2, BLOCK_2x2 }
}

Definition at line 124 of file truemotion1.c.

ff_truemotion1_decoder

AVCodec ff_truemotion1_decoder

Initial value:

= {
    .name           = "truemotion1",
    .long_name      = NULL_IF_CONFIG_SMALL("Duck TrueMotion 1.0"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_TRUEMOTION1,
    .priv_data_size = sizeof(TrueMotion1Context),
    .init           = truemotion1_decode_init,
    .close          = truemotion1_decode_end,
    .decode         = truemotion1_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
}

Definition at line 913 of file truemotion1.c.