Data Structures | Macros | Typedefs | Functions | Variables
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 "libavutil/intreadwrite.h"
#include "avcodec.h"

Go to the source code of this file.

Data Structures

struct  QtrleContext

Macros

#define CHECK_STREAM_PTR(n)
#define CHECK_PIXEL_PTR(n)

Typedefs

typedef struct QtrleContext QtrleContext

Functions

static void qtrle_decode_1bpp (QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
static void qtrle_decode_2n4bpp (QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change, int bpp)
static void qtrle_decode_8bpp (QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
static void qtrle_decode_16bpp (QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
static void qtrle_decode_24bpp (QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
static void qtrle_decode_32bpp (QtrleContext *s, int stream_ptr, 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 *data_size, 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_INFO, "Problem: pixel_ptr = %d, pixel_limit = %d\n", \
pixel_ptr + n, pixel_limit); \
return; \
} \

Definition at line 59 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().

#define CHECK_STREAM_PTR (   n)
Value:
if ((stream_ptr + n) > s->size) { \
av_log (s->avctx, AV_LOG_INFO, "Problem: stream_ptr out of bounds (%d >= %d)\n", \
stream_ptr + n, s->size); \
return; \
}

Definition at line 52 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().

Typedef Documentation

typedef struct QtrleContext QtrleContext

Function Documentation

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

Definition at line 227 of file qtrle.c.

Referenced by qtrle_decode_frame().

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

Definition at line 66 of file qtrle.c.

Referenced by qtrle_decode_frame().

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

Definition at line 276 of file qtrle.c.

Referenced by qtrle_decode_frame().

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

Definition at line 116 of file qtrle.c.

Referenced by qtrle_decode_frame().

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

Definition at line 326 of file qtrle.c.

Referenced by qtrle_decode_frame().

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

Definition at line 174 of file qtrle.c.

Referenced by qtrle_decode_frame().

static av_cold int qtrle_decode_end ( AVCodecContext *  avctx)
static

Definition at line 527 of file qtrle.c.

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

Definition at line 418 of file qtrle.c.

static av_cold int qtrle_decode_init ( AVCodecContext *  avctx)
static

Definition at line 375 of file qtrle.c.

Variable Documentation

AVCodec ff_qtrle_decoder
Initial value:
{
.name = "qtrle",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_QTRLE,
.priv_data_size = sizeof(QtrleContext),
.init = qtrle_decode_init,
.close = qtrle_decode_end,
.decode = qtrle_decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"),
}

Definition at line 537 of file qtrle.c.