mvcdec.c File Reference

Silicon Graphics Motion Video Compressor 1 & 2 decoder. More...

#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "bytestream.h"

Go to the source code of this file.

Data Structures
struct	MvcContext

Macros
#define	PIX16(target, true, false)
#define	ROW16(row, a1, a0, b1, b0)
#define	PIX32(target, true, false)
#define	ROW32(row, a1, a0, b1, b0)
#define	MVC2_BLOCK

Functions
static av_cold int	mvc_decode_init (AVCodecContext *avctx)
static int	decode_mvc1 (AVCodecContext *avctx, GetByteContext *gb, uint8_t *dst_start, int width, int height, int linesize)
static void	set_4x4_block (uint8_t *dst, int linesize, uint32_t pixel)
static int	decode_mvc2 (AVCodecContext *avctx, GetByteContext *gb, uint8_t *dst_start, int width, int height, int linesize, int vflip)
static int	mvc_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	mvc_decode_end (AVCodecContext *avctx)

Detailed Description

Silicon Graphics Motion Video Compressor 1 & 2 decoder.

Definition in file mvcdec.c.

Macro Definition Documentation

#define PIX16	(		target,
			true,
			false
	)

Value:

i = (mask & target) ? true : false; \
        AV_WN16A(dst, (v[i] & 0x7C00) | (v[i] & 0x3E0) | (v[i] & 0x1F)); \
        dst += 2;

#define ROW16	(		row,
			a1,
			a0,
			b1,
			b0
	)

Value:

dst = dst_start + (y + row) * linesize + x * 2; \
        PIX16(1 << (row * 4),     a1, a0) \
        PIX16(1 << (row * 4 + 1), a1, a0) \
        PIX16(1 << (row * 4 + 2), b1, b0) \
        PIX16(1 << (row * 4 + 3), b1, b0)

Referenced by decode_mvc1().

#define PIX32	(		target,
			true,
			false
	)

Value:

AV_WN32A(dst, (mask & target) ? v[true] : v[false]); \
    dst += 4;

Definition at line 119 of file mvcdec.c.

#define ROW32	(		row,
			a1,
			a0,
			b1,
			b0
	)

Value:

dst = dst_start + (y + row) * linesize + x * 4; \
    PIX32(1 << (row * 4),     a1, a0) \
    PIX32(1 << (row * 4 + 1), a1, a0) \
    PIX32(1 << (row * 4 + 2), b1, b0) \
    PIX32(1 << (row * 4 + 3), b1, b0)

Definition at line 123 of file mvcdec.c.

#define MVC2_BLOCK

Value:

ROW32(0, 1, 0, 3, 2); \
    ROW32(1, 1, 0, 3, 2); \
    ROW32(2, 5, 4, 7, 6); \
    ROW32(3, 5, 4, 7, 6);

Definition at line 130 of file mvcdec.c.

Referenced by decode_mvc2().

Function Documentation

static av_cold int mvc_decode_init ( AVCodecContext *  avctx )

static

Definition at line 35 of file mvcdec.c.

static int decode_mvc1 ( AVCodecContext *  avctx, GetByteContext *  gb, uint8_t *  dst_start, int  width, int  height, int  linesize  )

static

Definition at line 59 of file mvcdec.c.

Referenced by mvc_decode_frame().

static void set_4x4_block ( uint8_t *  dst, int  linesize, uint32_t  pixel  )

static

Definition at line 111 of file mvcdec.c.

Referenced by decode_mvc2().

static int decode_mvc2 ( AVCodecContext *  avctx, GetByteContext *  gb, uint8_t *  dst_start, int  width, int  height, int  linesize, int  vflip  )

static

Definition at line 136 of file mvcdec.c.

Referenced by mvc_decode_frame().

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

static

Definition at line 223 of file mvcdec.c.

static av_cold int mvc_decode_end ( AVCodecContext *  avctx )

static

Definition at line 253 of file mvcdec.c.