tscc2.c File Reference

TechSmith Screen Codec 2 decoder. More...

#include "avcodec.h"
#include "get_bits.h"
#include "bytestream.h"
#include "internal.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 27 of file tscc2.c.

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

Definition at line 91 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));  \

Definition at line 92 of file tscc2.c.

Referenced by tscc2_idct4_put().

#define COL_OP	(		a,
			b
	)		a = b

Definition at line 98 of file tscc2.c.

Referenced by tscc2_idct4_put().

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

Definition at line 99 of file tscc2.c.

Referenced by tscc2_idct4_put().

Function Documentation

static av_cold void free_vlcs ( TSCC2Context *  c )

static

Definition at line 47 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 58 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 101 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 124 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 189 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 215 of file tscc2.c.

static av_cold int tscc2_decode_end ( AVCodecContext *  avctx )

static

Definition at line 332 of file tscc2.c.

Referenced by tscc2_decode_init().

static av_cold int tscc2_decode_init ( AVCodecContext *  avctx )

static

Definition at line 343 of file tscc2.c.

Variable Documentation

AVCodec ff_tscc2_decoder

Initial value:

= {
    .name           = "tscc2",
    .long_name      = NULL_IF_CONFIG_SMALL("TechSmith Screen Codec 2"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_TSCC2,
    .priv_data_size = sizeof(TSCC2Context),
    .init           = tscc2_decode_init,
    .close          = tscc2_decode_end,
    .decode         = tscc2_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
}

Definition at line 375 of file tscc2.c.