libavcodec/smc.c File Reference

QT SMC Video Decoder by Mike Melanson (melanson@pcisys.net) For more information about the SMC format, visit: http://www.pcisys.net/~melanson/codecs/. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "bytestream.h"

Go to the source code of this file.

Data Structures
struct	SmcContext
Defines
#define	CPAIR   2
#define	CQUAD   4
#define	COCTET   8
#define	COLORS_PER_TABLE   256
#define	GET_BLOCK_COUNT()   (opcode & 0x10) ? (1 + bytestream2_get_byte(&s->gb)) : 1 + (opcode & 0x0F);
#define	ADVANCE_BLOCK()
Typedefs
typedef struct SmcContext	SmcContext
Functions
static void	smc_decode_stream (SmcContext *s)
static av_cold int	smc_decode_init (AVCodecContext *avctx)
static int	smc_decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
static av_cold int	smc_decode_end (AVCodecContext *avctx)
Variables
AVCodec	ff_smc_decoder

---

Detailed Description

QT SMC Video Decoder by Mike Melanson (melanson@pcisys.net) For more information about the SMC format, visit: http://www.pcisys.net/~melanson/codecs/.

The SMC decoder outputs PAL8 colorspace data.

Definition in file smc.c.

---

Define Documentation

#define ADVANCE_BLOCK

(

)

Value:

{ \
    pixel_ptr += 4; \
    if (pixel_ptr >= width) \
    { \
        pixel_ptr = 0; \
        row_ptr += stride * 4; \
    } \
    total_blocks--; \
    if (total_blocks < 0) \
    { \
        av_log(s->avctx, AV_LOG_INFO, "warning: block counter just went negative (this should not happen)\n"); \
        return; \
    } \
}

Definition at line 63 of file smc.c.

Referenced by smc_decode_stream().

#define COCTET   8

Definition at line 41 of file smc.c.

Referenced by smc_decode_stream().

#define COLORS_PER_TABLE   256

Definition at line 43 of file smc.c.

Referenced by smc_decode_stream().

#define CPAIR   2

Definition at line 39 of file smc.c.

Referenced by smc_decode_stream().

#define CQUAD   4

Definition at line 40 of file smc.c.

Referenced by smc_decode_stream().

#define GET_BLOCK_COUNT

(

)

(opcode & 0x10) ? (1 + bytestream2_get_byte(&s->gb)) : 1 + (opcode & 0x0F);

Definition at line 60 of file smc.c.

Referenced by smc_decode_stream().

---

Typedef Documentation

typedef struct SmcContext SmcContext

---

Function Documentation

static av_cold int smc_decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 457 of file smc.c.

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

Definition at line 424 of file smc.c.

static av_cold int smc_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 412 of file smc.c.

static void smc_decode_stream

(

SmcContext *

s

)

[static]

Definition at line 79 of file smc.c.

Referenced by smc_decode_frame().

---

Variable Documentation

AVCodec ff_smc_decoder

Initial value:

 {
    .name           = "smc",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = CODEC_ID_SMC,
    .priv_data_size = sizeof(SmcContext),
    .init           = smc_decode_init,
    .close          = smc_decode_end,
    .decode         = smc_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("QuickTime Graphics (SMC)"),
}

Definition at line 467 of file smc.c.