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()

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.

#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().


Function Documentation

static av_cold int smc_decode_end ( AVCodecContext avctx  )  [static]

Definition at line 458 of file smc.c.

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

Definition at line 425 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

Initial value:

 {
    .name           = "smc",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_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 468 of file smc.c.


Generated on Fri Oct 26 02:50:07 2012 for FFmpeg by  doxygen 1.5.8