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Data Structures | Macros | Functions | Variables
tscc2.c File Reference

TechSmith Screen Codec 2 decoder. More...

#include <inttypes.h>
#include "avcodec.h"
#include "get_bits.h"
#include "bytestream.h"
#include "internal.h"
#include "mathops.h"
#include "tscc2data.h"

Go to the source code of this file.

Data Structures

struct  TSCC2Context
 

Macros

#define BITSTREAM_READER_LE
 
#define DEQUANT(val, q)   (((q) * (val) + 0x80) >> 8)
 
#define DCT1D(d0, d1, d2, d3, s0, s1, s2, s3, OP)
 
#define COL_OP(a, b)   a = (b)
 
#define ROW_OP(a, b)   a = ((b) + 0x20) >> 6
 

Functions

static av_cold void free_vlcs (TSCC2Context *c)
 
static av_cold int init_vlcs (TSCC2Context *c)
 
static void tscc2_idct4_put (int *in, int q[3], uint8_t *dst, int stride)
 
static int tscc2_decode_mb (TSCC2Context *c, int *q, int vlc_set, uint8_t *dst, int stride, int plane)
 
static int tscc2_decode_slice (TSCC2Context *c, int mb_y, const uint8_t *buf, int buf_size)
 
static int tscc2_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
 
static av_cold int tscc2_decode_end (AVCodecContext *avctx)
 
static av_cold int tscc2_decode_init (AVCodecContext *avctx)
 

Variables

AVCodec ff_tscc2_decoder
 

Detailed Description

TechSmith Screen Codec 2 decoder.

Definition in file tscc2.c.

Macro Definition Documentation

#define BITSTREAM_READER_LE

Definition at line 29 of file tscc2.c.

#define DEQUANT (   val,
 
)    (((q) * (val) + 0x80) >> 8)

Definition at line 94 of file tscc2.c.

Referenced by tscc2_idct4_put().

#define DCT1D (   d0,
  d1,
  d2,
  d3,
  s0,
  s1,
  s2,
  s3,
  OP 
)
Value:
OP(d0, 5 * ((s0) + (s1) + (s2)) + 2 * (s3)); \
OP(d1, 5 * ((s0) - (s2) - (s3)) + 2 * (s1)); \
OP(d2, 5 * ((s0) - (s2) + (s3)) - 2 * (s1)); \
OP(d3, 5 * ((s0) - (s1) + (s2)) - 2 * (s3)); \
#define s2
Definition: regdef.h:39
#define s0
Definition: regdef.h:37
#define OP(LOAD, STORE)
Definition: hpeldsp_alpha.c:55
#define s3
Definition: regdef.h:40
#define s1
Definition: regdef.h:38

Definition at line 95 of file tscc2.c.

Referenced by tscc2_idct4_put().

#define COL_OP (   a,
  b 
)    a = (b)

Definition at line 101 of file tscc2.c.

Referenced by tscc2_idct4_put().

#define ROW_OP (   a,
  b 
)    a = ((b) + 0x20) >> 6

Definition at line 102 of file tscc2.c.

Referenced by tscc2_idct4_put().

Function Documentation

static av_cold void free_vlcs ( TSCC2Context c)
static

Definition at line 50 of file tscc2.c.

Referenced by init_vlcs(), tscc2_decode_end(), and tscc2_decode_init().

static av_cold int init_vlcs ( TSCC2Context c)
static

Definition at line 61 of file tscc2.c.

Referenced by tscc2_decode_init().

static void tscc2_idct4_put ( int *  in,
int  q[3],
uint8_t dst,
int  stride 
)
static

Definition at line 104 of file tscc2.c.

Referenced by tscc2_decode_mb().

static int tscc2_decode_mb ( TSCC2Context c,
int *  q,
int  vlc_set,
uint8_t dst,
int  stride,
int  plane 
)
static

Definition at line 127 of file tscc2.c.

Referenced by tscc2_decode_slice().

static int tscc2_decode_slice ( TSCC2Context c,
int  mb_y,
const uint8_t buf,
int  buf_size 
)
static

Definition at line 192 of file tscc2.c.

Referenced by tscc2_decode_frame().

static int tscc2_decode_frame ( AVCodecContext avctx,
void data,
int *  got_frame,
AVPacket avpkt 
)
static

Definition at line 218 of file tscc2.c.

static av_cold int tscc2_decode_end ( AVCodecContext avctx)
static

Definition at line 336 of file tscc2.c.

Referenced by tscc2_decode_init().

static av_cold int tscc2_decode_init ( AVCodecContext avctx)
static

Definition at line 347 of file tscc2.c.

Variable Documentation

AVCodec ff_tscc2_decoder
Initial value:
= {
.name = "tscc2",
.long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Codec 2"),
.priv_data_size = sizeof(TSCC2Context),
.close = tscc2_decode_end,
.capabilities = AV_CODEC_CAP_DR1,
}
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static int tscc2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: tscc2.c:218
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
static av_cold int tscc2_decode_end(AVCodecContext *avctx)
Definition: tscc2.c:336
static av_cold int tscc2_decode_init(AVCodecContext *avctx)
Definition: tscc2.c:347
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:722
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:953

Definition at line 379 of file tscc2.c.