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qtrle.c File Reference

QT RLE Video Decoder by Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t) For more information about the QT RLE format, visit: http://www.pcisys.net/~melanson/codecs/. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct  QtrleContext
 

Macros

#define CHECK_PIXEL_PTR(n)
 

Functions

static void qtrle_decode_1bpp (QtrleContext *s, int row_ptr, int lines_to_change)
 
static void qtrle_decode_2n4bpp (QtrleContext *s, int row_ptr, int lines_to_change, int bpp)
 
static void qtrle_decode_8bpp (QtrleContext *s, int row_ptr, int lines_to_change)
 
static void qtrle_decode_16bpp (QtrleContext *s, int row_ptr, int lines_to_change)
 
static void qtrle_decode_24bpp (QtrleContext *s, int row_ptr, int lines_to_change)
 
static void qtrle_decode_32bpp (QtrleContext *s, int row_ptr, int lines_to_change)
 
static av_cold int qtrle_decode_init (AVCodecContext *avctx)
 
static int qtrle_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
 
static av_cold int qtrle_decode_end (AVCodecContext *avctx)
 

Variables

AVCodec ff_qtrle_decoder
 

Detailed Description

QT RLE Video Decoder by Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t) For more information about the QT RLE format, visit: http://www.pcisys.net/~melanson/codecs/.

The QT RLE decoder has seven modes of operation: 1, 2, 4, 8, 16, 24, and 32 bits per pixel. For modes 1, 2, 4, and 8 the decoder outputs PAL8 colorspace data. 16-bit data yields RGB555 data. 24-bit data is RGB24 and 32-bit data is RGB32.

Definition in file qtrle.c.

Macro Definition Documentation

#define CHECK_PIXEL_PTR (   n)
Value:
if ((pixel_ptr + n > pixel_limit) || (pixel_ptr + n < 0)) { \
av_log (s->avctx, AV_LOG_ERROR, "Problem: pixel_ptr = %d, pixel_limit = %d\n",\
pixel_ptr + n, pixel_limit); \
} \
const char * s
Definition: avisynth_c.h:768
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
return
int n
Definition: avisynth_c.h:684

Definition at line 50 of file qtrle.c.

Referenced by qtrle_decode_16bpp(), qtrle_decode_1bpp(), qtrle_decode_24bpp(), qtrle_decode_2n4bpp(), qtrle_decode_32bpp(), and qtrle_decode_8bpp().

Function Documentation

static void qtrle_decode_1bpp ( QtrleContext s,
int  row_ptr,
int  lines_to_change 
)
static

Definition at line 57 of file qtrle.c.

Referenced by qtrle_decode_frame().

static void qtrle_decode_2n4bpp ( QtrleContext s,
int  row_ptr,
int  lines_to_change,
int  bpp 
)
inlinestatic

Definition at line 142 of file qtrle.c.

Referenced by qtrle_decode_frame().

static void qtrle_decode_8bpp ( QtrleContext s,
int  row_ptr,
int  lines_to_change 
)
static

Definition at line 199 of file qtrle.c.

Referenced by qtrle_decode_frame().

static void qtrle_decode_16bpp ( QtrleContext s,
int  row_ptr,
int  lines_to_change 
)
static

Definition at line 248 of file qtrle.c.

Referenced by qtrle_decode_frame().

static void qtrle_decode_24bpp ( QtrleContext s,
int  row_ptr,
int  lines_to_change 
)
static

Definition at line 292 of file qtrle.c.

Referenced by qtrle_decode_frame().

static void qtrle_decode_32bpp ( QtrleContext s,
int  row_ptr,
int  lines_to_change 
)
static

Definition at line 339 of file qtrle.c.

Referenced by qtrle_decode_frame().

static av_cold int qtrle_decode_init ( AVCodecContext avctx)
static

Definition at line 383 of file qtrle.c.

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

Definition at line 425 of file qtrle.c.

static av_cold int qtrle_decode_end ( AVCodecContext avctx)
static

Definition at line 529 of file qtrle.c.

Variable Documentation

AVCodec ff_qtrle_decoder
Initial value:
= {
.name = "qtrle",
.long_name = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"),
.priv_data_size = sizeof(QtrleContext),
.close = qtrle_decode_end,
.capabilities = AV_CODEC_CAP_DR1,
}
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static av_cold int qtrle_decode_init(AVCodecContext *avctx)
Definition: qtrle.c:383
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:750
static int qtrle_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: qtrle.c:425
static av_cold int qtrle_decode_end(AVCodecContext *avctx)
Definition: qtrle.c:529
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:958

Definition at line 538 of file qtrle.c.