smcenc.c File Reference

#include "libavutil/common.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "encode.h"
#include "bytestream.h"

Go to the source code of this file.

Data Structures
struct	SMCContext

Macros
#define	CPAIR   2
#define	CQUAD   4
#define	COCTET   8
#define	COLORS_PER_TABLE   256
#define	ADVANCE_BLOCK(pixel_ptr, row_ptr, nb_blocks)
#define	CACHE_PAIR(x)
#define	CACHE_QUAD(x)
#define	CACHE_OCTET(x)

Functions
static int	smc_cmp_values (const void *a, const void *b)
static int	count_distinct_items (const uint8_t *block_values, uint8_t *distinct_values, int size)
static void	smc_encode_stream (SMCContext *s, const AVFrame *frame, PutByteContext *pb)
static int	smc_encode_init (AVCodecContext *avctx)
static int	smc_encode_frame (AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
static int	smc_encode_end (AVCodecContext *avctx)

Variables
const FFCodec	ff_smc_encoder

Detailed Description

QT SMC Video Encoder by Paul B. Mahol

Definition in file smcenc.c.

Macro Definition Documentation

CPAIR

#define CPAIR   2

Definition at line 34 of file smcenc.c.

CQUAD

#define CQUAD   4

Definition at line 35 of file smcenc.c.

COCTET

#define COCTET   8

Definition at line 36 of file smcenc.c.

COLORS_PER_TABLE

#define COLORS_PER_TABLE   256

Definition at line 38 of file smcenc.c.

ADVANCE_BLOCK

#define ADVANCE_BLOCK	(		pixel_ptr,
			row_ptr,
			nb_blocks
	)

Value:

{ \
    for (int block = 0; block < nb_blocks && pixel_ptr && row_ptr; block++) { \
        pixel_ptr += 4; \
        cur_x += 4; \
        if (pixel_ptr - row_ptr >= width) \
        { \
            row_ptr += stride * 4; \
            pixel_ptr = row_ptr; \
            cur_y += 4; \
            cur_x  = 0; \
        } \
    } \
}

Definition at line 56 of file smcenc.c.

CACHE_PAIR

#define CACHE_PAIR

(

x

)

Value:

    (s->color_pairs[i][0] == distinct_values[x] || \
     s->color_pairs[i][1] == distinct_values[x])

Definition at line 95 of file smcenc.c.

CACHE_QUAD

#define CACHE_QUAD

(

x

)

Value:

    (s->color_quads[i][0] == distinct_values[x] || \
     s->color_quads[i][1] == distinct_values[x] || \
     s->color_quads[i][2] == distinct_values[x] || \
     s->color_quads[i][3] == distinct_values[x])

Definition at line 99 of file smcenc.c.

CACHE_OCTET

#define CACHE_OCTET

(

x

)

Value:

    (s->color_octets[i][0] == distinct_values[x] || \
     s->color_octets[i][1] == distinct_values[x] || \
     s->color_octets[i][2] == distinct_values[x] || \
     s->color_octets[i][3] == distinct_values[x] || \
     s->color_octets[i][4] == distinct_values[x] || \
     s->color_octets[i][5] == distinct_values[x] || \
     s->color_octets[i][6] == distinct_values[x] || \
     s->color_octets[i][7] == distinct_values[x])

Definition at line 105 of file smcenc.c.

Function Documentation

smc_cmp_values()

static int smc_cmp_values ( const void *  a, const void *  b  )

static

Definition at line 71 of file smcenc.c.

Referenced by smc_encode_stream().

count_distinct_items()

static int count_distinct_items ( const uint8_t *  block_values, uint8_t *  distinct_values, int  size  )

static

Definition at line 78 of file smcenc.c.

Referenced by smc_encode_stream().

smc_encode_stream()

static void smc_encode_stream ( SMCContext *  s, const AVFrame *  frame, PutByteContext *  pb  )

static

Definition at line 115 of file smcenc.c.

Referenced by smc_encode_frame().

smc_encode_init()

static int smc_encode_init ( AVCodecContext *  avctx )

static

Definition at line 518 of file smcenc.c.

smc_encode_frame()

static int smc_encode_frame ( AVCodecContext *  avctx, AVPacket *  pkt, const AVFrame *  frame, int *  got_packet  )

static

Definition at line 531 of file smcenc.c.

smc_encode_end()

static int smc_encode_end ( AVCodecContext *  avctx )

static

Definition at line 583 of file smcenc.c.

Variable Documentation

ff_smc_encoder

const FFCodec ff_smc_encoder

Initial value:

= {
    .p.name         = "smc",
    CODEC_LONG_NAME("QuickTime Graphics (SMC)"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_SMC,
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
    .priv_data_size = sizeof(SMCContext),
    .init           = smc_encode_init,
    FF_CODEC_ENCODE_CB(smc_encode_frame),
    .close          = smc_encode_end,
    .p.pix_fmts     = (const enum AVPixelFormat[]) { AV_PIX_FMT_PAL8,
                                                     AV_PIX_FMT_NONE},
}

Definition at line 592 of file smcenc.c.