hvirtual/quicktime/ffmpeg/libavcodec/smc.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "avcodec.h"
#include "dsputil.h"

Include dependency graph for smc.c:

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 + s->buf[stream_ptr++]) : 1 + (opcode & 0x0F);
#define	ADVANCE_BLOCK()
Functions
static void	smc_decode_stream (SmcContext *s)
static int	smc_decode_init (AVCodecContext *avctx)
static int	smc_decode_frame (AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
static int	smc_decode_end (AVCodecContext *avctx)
Variables
AVCodec	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 64 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 + s->buf[stream_ptr++]) : 1 + (opcode & 0x0F);

Definition at line 61 of file smc.c.

Referenced by smc_decode_stream().

---

Function Documentation

static int smc_decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 471 of file smc.c.

References SmcContext::frame, AVCodecContext::priv_data, AVCodecContext::release_buffer, and s.

static int smc_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		uint8_t *	buf,
		int	buf_size
	)			[static]

Definition at line 445 of file smc.c.

References av_log(), AV_LOG_ERROR, SmcContext::avctx, SmcContext::buf, FF_BUFFER_HINTS_PRESERVE, FF_BUFFER_HINTS_READABLE, FF_BUFFER_HINTS_REUSABLE, FF_BUFFER_HINTS_VALID, SmcContext::frame, AVCodecContext::priv_data, AVCodecContext::reget_buffer, s, SmcContext::size, and smc_decode_stream().

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static int smc_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 431 of file smc.c.

References SmcContext::avctx, SmcContext::dsp, dsputil_init(), SmcContext::frame, AVCodecContext::has_b_frames, NULL, AVCodecContext::pix_fmt, PIX_FMT_PAL8, AVCodecContext::priv_data, and s.

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static void smc_decode_stream

(

SmcContext *

s

)

[static]

Definition at line 80 of file smc.c.

References ADVANCE_BLOCK, av_log(), AV_LOG_INFO, SmcContext::avctx, AVPALETTE_SIZE, BE_16, BE_32, SmcContext::buf, COCTET, SmcContext::color_octets, SmcContext::color_pairs, SmcContext::color_quads, COLORS_PER_TABLE, CPAIR, CQUAD, SmcContext::frame, GET_BLOCK_COUNT, AVCodecContext::height, height, memcpy, AVCodecContext::palctrl, AVPaletteControl::palette, AVPaletteControl::palette_changed, pixels, SmcContext::size, stride, AVCodecContext::width, and width.

Referenced by smc_decode_frame().

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---

Variable Documentation

AVCodec smc_decoder

Initial value:

 {
    "smc",
    CODEC_TYPE_VIDEO,
    CODEC_ID_SMC,
    sizeof(SmcContext),
    smc_decode_init,
    NULL,
    smc_decode_end,
    smc_decode_frame,
    CODEC_CAP_DR1,
}

Definition at line 481 of file smc.c.

Referenced by avcodec_register_all().