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.


#define WRITE_FRAME(D, PIXEL, suffix)


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)


AVCodec ff_pgx_decoder

Macro Definition Documentation

#define WRITE_FRAME (   D,
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)); \
val = bytestream2_get_ ##suffix(g); \
val <<= (D - depth); \
*(line + j) = val; \
} \
} \
} \
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
const char * g
Definition: vf_curves.c:117
#define height
const char * suffix
Definition: checkasm.c:208
Definition: graph2dot.c:48
#define width
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
#define PIXEL(img, x, y, w, h, stride, def)
Definition: transform.c:36
D(D(float, sse)
Definition: rematrix_init.c:28
static double val(void *priv, double ch)
Definition: aeval.c:76
for(j=16;j >0;--j)
int i
Definition: input.c:407

Definition at line 97 of file pgxdec.c.

Function Documentation

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

Definition at line 27 of file pgxdec.c.

Referenced by pgx_decode_header().

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

Definition at line 52 of file pgxdec.c.

Referenced by pgx_decode_frame().

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

Definition at line 119 of file pgxdec.c.

Variable Documentation

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,
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:117
static int pgx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: pgxdec.c:119
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators...
Definition: codec.h:52

Definition at line 161 of file pgxdec.c.