FFmpeg
Data Structures | Macros | Functions | Variables
gemdec.c File Reference
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"

Go to the source code of this file.

Data Structures

struct  State
 

Macros

#define SKIP
 
#define PUT(v)
 

Functions

static void put_lines_bits (AVCodecContext *avctx, int planes, int row_width, int pixel_size, State *state, uint8_t *row, AVFrame *p)
 
static void put_lines_bytes (AVCodecContext *avctx, int planes, int row_width, int pixel_size, State *state, uint8_t *row, AVFrame *p)
 
static int gem_decode_frame (AVCodecContext *avctx, AVFrame *p, int *got_frame, AVPacket *avpkt)
 
static av_cold int gem_close (AVCodecContext *avctx)
 

Variables

static const uint32_t gem_color_palette [16]
 
static const uint8_t gem_gray [256]
 
const FFCodec ff_gem_decoder
 

Detailed Description

GEM Raster image decoder

Definition in file gemdec.c.

Macro Definition Documentation

◆ SKIP

#define SKIP
Value:
do { \
x++; \
if (x >= row_width) { \
put_lines(avctx, planes, row_width, pixel_size, &state, row + state.pl * row_width, p); \
if (state.y >= avctx->height) goto abort; \
x = 0; \
} \
} while(0)

◆ PUT

#define PUT (   v)
Value:
do { \
row[state.pl * row_width + x++] = v; \
if (x >= row_width) { \
put_lines(avctx, planes, row_width, pixel_size, &state, row + state.pl * row_width, p); \
if (state.y >= avctx->height) goto abort; \
x = 0; \
} \
} while(0)

Function Documentation

◆ put_lines_bits()

static void put_lines_bits ( AVCodecContext avctx,
int  planes,
int  row_width,
int  pixel_size,
State state,
uint8_t *  row,
AVFrame p 
)
static

Definition at line 62 of file gemdec.c.

Referenced by gem_decode_frame().

◆ put_lines_bytes()

static void put_lines_bytes ( AVCodecContext avctx,
int  planes,
int  row_width,
int  pixel_size,
State state,
uint8_t *  row,
AVFrame p 
)
static

Definition at line 79 of file gemdec.c.

Referenced by gem_decode_frame().

◆ gem_decode_frame()

static int gem_decode_frame ( AVCodecContext avctx,
AVFrame p,
int got_frame,
AVPacket avpkt 
)
static

Definition at line 88 of file gemdec.c.

◆ gem_close()

static av_cold int gem_close ( AVCodecContext avctx)
static

Definition at line 347 of file gemdec.c.

Variable Documentation

◆ gem_color_palette

const uint32_t gem_color_palette[16]
static
Initial value:
={
0xFFFFFFFF, 0xFFFF0000, 0xFF00FF00, 0xFFFFFF00,
0xFF0000FF, 0xFFFF00FF, 0xFF00FFFF, 0xFFAEAEAE,
0xFF555555, 0xFFAE0000, 0xFF00AE00, 0xFFAEAE00,
0xFF0000AE, 0xFFAE00AE, 0xFF00AEAE, 0xFF000000,
}

Definition at line 32 of file gemdec.c.

Referenced by gem_decode_frame().

◆ gem_gray

const uint8_t gem_gray[256]
static
Initial value:
={
0xFF, 0x7F, 0xBF, 0x3F, 0xDF, 0x5F, 0x9F, 0x1F, 0xEF, 0x6F, 0xAF, 0x2F, 0xCF, 0x4F, 0x8F, 0x0F,
0xF7, 0x77, 0xB7, 0x37, 0xD7, 0x57, 0x97, 0x17, 0xE7, 0x67, 0xA7, 0x27, 0xC7, 0x47, 0x87, 0x07,
0xFB, 0x7B, 0xBB, 0x3B, 0xDB, 0x5B, 0x9B, 0x1B, 0xEB, 0x6B, 0xAB, 0x2B, 0xCB, 0x4B, 0x8B, 0x0B,
0xF3, 0x73, 0xB3, 0x33, 0xD3, 0x53, 0x93, 0x13, 0xE3, 0x63, 0xA3, 0x23, 0xC3, 0x43, 0x83, 0x03,
0xFD, 0x7D, 0xBD, 0x3D, 0xDD, 0x5D, 0x9D, 0x1D, 0xED, 0x6D, 0xAD, 0x2D, 0xCD, 0x4D, 0x8D, 0x0D,
0xF5, 0x75, 0xB5, 0x35, 0xD5, 0x55, 0x95, 0x15, 0xE5, 0x65, 0xA5, 0x25, 0xC5, 0x45, 0x85, 0x05,
0xF9, 0x79, 0xB9, 0x39, 0xD9, 0x59, 0x99, 0x19, 0xE9, 0x69, 0xA9, 0x29, 0xC9, 0x49, 0x89, 0x09,
0xF1, 0x71, 0xB1, 0x31, 0xD1, 0x51, 0x91, 0x11, 0xE1, 0x61, 0xA1, 0x21, 0xC1, 0x41, 0x81, 0x01,
0xFE, 0x7E, 0xBE, 0x3E, 0xDE, 0x5E, 0x9E, 0x1E, 0xEE, 0x6E, 0xAE, 0x2E, 0xCE, 0x4E, 0x8E, 0x0E,
0xF6, 0x76, 0xB6, 0x36, 0xD6, 0x56, 0x96, 0x16, 0xE6, 0x66, 0xA6, 0x26, 0xC6, 0x46, 0x86, 0x06,
0xFA, 0x7A, 0xBA, 0x3A, 0xDA, 0x5A, 0x9A, 0x1A, 0xEA, 0x6A, 0xAA, 0x2A, 0xCA, 0x4A, 0x8A, 0x0A,
0xF2, 0x72, 0xB2, 0x32, 0xD2, 0x52, 0x92, 0x12, 0xE2, 0x62, 0xA2, 0x22, 0xC2, 0x42, 0x82, 0x02,
0xFC, 0x7C, 0xBC, 0x3C, 0xDC, 0x5C, 0x9C, 0x1C, 0xEC, 0x6C, 0xAC, 0x2C, 0xCC, 0x4C, 0x8C, 0x0C,
0xF4, 0x74, 0xB4, 0x34, 0xD4, 0x54, 0x94, 0x14, 0xE4, 0x64, 0xA4, 0x24, 0xC4, 0x44, 0x84, 0x04,
0xF8, 0x78, 0xB8, 0x38, 0xD8, 0x58, 0x98, 0x18, 0xE8, 0x68, 0xA8, 0x28, 0xC8, 0x48, 0x88, 0x08,
0xF0, 0x70, 0xB0, 0x30, 0xD0, 0x50, 0x90, 0x10, 0xE0, 0x60, 0xA0, 0x20, 0xC0, 0x40, 0x80, 0x00,
}

Definition at line 39 of file gemdec.c.

Referenced by gem_decode_frame().

◆ ff_gem_decoder

const FFCodec ff_gem_decoder
Initial value:
= {
.p.name = "gem",
CODEC_LONG_NAME("GEM Raster image"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_GEM,
.p.capabilities = AV_CODEC_CAP_DR1,
.close = gem_close,
}

Definition at line 353 of file gemdec.c.

state
static struct @335 state
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:279
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:264
gem_decode_frame
static int gem_decode_frame(AVCodecContext *avctx, AVFrame *p, int *got_frame, AVPacket *avpkt)
Definition: gemdec.c:88
planes
static const struct @336 planes[]
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
gem_close
static av_cold int gem_close(AVCodecContext *avctx)
Definition: gemdec.c:347
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_CODEC_ID_GEM
@ AV_CODEC_ID_GEM
Definition: codec_id.h:314