libavcodec/tscc2.c File Reference

TechSmith Screen Codec 2 decoder. More...

#include "avcodec.h"
#include "get_bits.h"
#include "bytestream.h"
#include "tscc2data.h"

Go to the source code of this file.

Data Structures
struct	TSCC2Context
Defines
#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 *data_size, AVPacket *avpkt)
static av_cold int	tscc2_decode_init (AVCodecContext *avctx)
static av_cold int	tscc2_decode_end (AVCodecContext *avctx)
Variables
AVCodec	ff_tscc2_decoder

---

Detailed Description

TechSmith Screen Codec 2 decoder.

Definition in file tscc2.c.

---

Define Documentation

#define BITSTREAM_READER_LE

Definition at line 27 of file tscc2.c.

#define COL_OP	(	a,
		b		)	a = b

Definition at line 97 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 91 of file tscc2.c.

Referenced by tscc2_idct4_put().

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

Definition at line 90 of file tscc2.c.

Referenced by tscc2_idct4_put().

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

Definition at line 98 of file tscc2.c.

Referenced by tscc2_idct4_put().

---

Function Documentation

static av_cold void free_vlcs

(

TSCC2Context *

c

)

[static]

Definition at line 46 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 57 of file tscc2.c.

static av_cold int tscc2_decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 360 of file tscc2.c.

static int tscc2_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)			[static]

Definition at line 213 of file tscc2.c.

static av_cold int tscc2_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 332 of file tscc2.c.

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

Definition at line 123 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 188 of file tscc2.c.

Referenced by tscc2_decode_frame().

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

Definition at line 100 of file tscc2.c.

Referenced by tscc2_decode_mb().

---

Variable Documentation

AVCodec ff_tscc2_decoder

Initial value:

 {
    .name           = "tscc2",
    .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,
    .long_name      = NULL_IF_CONFIG_SMALL("TechSmith Screen Codec 2"),
}

Definition at line 372 of file tscc2.c.