FFmpeg
Macros | Functions | Variables
pgxdec.c File Reference
#include "avcodec.h"
#include "internal.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "libavutil/imgutils.h"

Go to the source code of this file.

Macros

#define WRITE_FRAME(D, PIXEL, suffix)
 

Functions

static int pgx_get_number (AVCodecContext *avctx, GetByteContext *g, int *number)
 
static int pgx_decode_header (AVCodecContext *avctx, GetByteContext *g, int *depth, int *width, int *height, int *sign)
 
static int pgx_decode_frame (AVCodecContext *avctx, AVFrame *p, int *got_frame, AVPacket *avpkt)
 

Variables

const FFCodec ff_pgx_decoder
 

Macro Definition Documentation

◆ WRITE_FRAME

#define WRITE_FRAME (   D,
  PIXEL,
  suffix 
)
Value:
static inline void write_frame_ ##D(AVFrame *frame, GetByteContext *g, \
int width, int height, int sign, int depth) \
{ \
const unsigned offset = sign ? (1 << (D - 1)) : 0; \
int i, j; \
for (i = 0; i < height; i++) { \
PIXEL *line = (PIXEL*)(frame->data[0] + i * frame->linesize[0]); \
for (j = 0; j < width; j++) { \
unsigned val = bytestream2_get_ ##suffix##u(g) << (D - depth); \
val ^= offset; \
*(line + j) = val; \
} \
} \
} \

Definition at line 94 of file pgxdec.c.

Function Documentation

◆ pgx_get_number()

static int pgx_get_number ( AVCodecContext avctx,
GetByteContext g,
int number 
)
static

Definition at line 28 of file pgxdec.c.

Referenced by pgx_decode_header().

◆ pgx_decode_header()

static int pgx_decode_header ( AVCodecContext avctx,
GetByteContext g,
int depth,
int width,
int height,
int sign 
)
static

Definition at line 53 of file pgxdec.c.

Referenced by pgx_decode_frame().

◆ pgx_decode_frame()

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

Definition at line 113 of file pgxdec.c.

Variable Documentation

◆ ff_pgx_decoder

const FFCodec ff_pgx_decoder
Initial value:
= {
.p.name = "pgx",
.p.long_name = NULL_IF_CONFIG_SMALL("PGX (JPEG2000 Test Format)"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_PGX,
.p.capabilities = AV_CODEC_CAP_DR1,
}

Definition at line 154 of file pgxdec.c.

GetByteContext
Definition: bytestream.h:33
u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:264
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
D
D(D(float, sse)
Definition: rematrix_init.c:29
val
static double val(void *priv, double ch)
Definition: aeval.c:77
width
#define width
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:254
g
const char * g
Definition: vf_curves.c:117
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
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:116
height
#define height
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
line
Definition: graph2dot.c:48
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
suffix
const char * suffix
Definition: checkasm.c:208
PIXEL
#define PIXEL
Definition: blend_modes.c:45
pgx_decode_frame
static int pgx_decode_frame(AVCodecContext *avctx, AVFrame *p, int *got_frame, AVPacket *avpkt)
Definition: pgxdec.c:113
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_CODEC_ID_PGX
@ AV_CODEC_ID_PGX
Definition: codec_id.h:245