FFmpeg
Macros | Functions | Variables
pgxdec.c File Reference
#include "avcodec.h"
#include "internal.h"
#include "bytestream.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, void *data, int *got_frame, AVPacket *avpkt)
 

Variables

const AVCodec 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) \
{ \
int i, j; \
for (i = 0; i < height; i++) { \
PIXEL *line = (PIXEL*)frame->data[0] + i*frame->linesize[0]/sizeof(PIXEL); \
for (j = 0; j < width; j++) { \
unsigned val; \
if (sign) \
val = (PIXEL)bytestream2_get_ ##suffix(g) + (1 << (depth - 1)); \
else \
val = bytestream2_get_ ##suffix(g); \
val <<= (D - depth); \
*(line + j) = val; \
} \
} \
} \

Definition at line 97 of file pgxdec.c.

Function Documentation

◆ pgx_get_number()

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

Definition at line 27 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 52 of file pgxdec.c.

Referenced by pgx_decode_frame().

◆ pgx_decode_frame()

static int pgx_decode_frame ( AVCodecContext avctx,
void *  data,
int got_frame,
AVPacket avpkt 
)
static

Definition at line 119 of file pgxdec.c.

Variable Documentation

◆ ff_pgx_decoder

const AVCodec ff_pgx_decoder
Initial value:
= {
.name = "pgx",
.long_name = NULL_IF_CONFIG_SMALL("PGX (JPEG2000 Test Format)"),
.decode = pgx_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
}

Definition at line 161 of file pgxdec.c.

GetByteContext
Definition: bytestream.h:33
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
D
D(D(float, sse)
Definition: rematrix_init.c:29
val
static double val(void *priv, double ch)
Definition: aeval.c:76
pgx_decode_frame
static int pgx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: pgxdec.c:119
width
#define width
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:117
height
#define height
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:200
PIXEL
#define PIXEL
Definition: blend_modes.c:45
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_CODEC_ID_PGX
@ AV_CODEC_ID_PGX
Definition: codec_id.h:245