FFmpeg
Data Structures | Macros | Functions | Variables
qtrle.c File Reference
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "avcodec.h"
#include "decode.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 void qtrle_decode_flush (AVCodecContext *avctx)
 
static av_cold int qtrle_decode_end (AVCodecContext *avctx)
 

Variables

const 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

◆ CHECK_PIXEL_PTR

#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); \
return; \
} \

Definition at line 51 of file qtrle.c.

Function Documentation

◆ qtrle_decode_1bpp()

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

Definition at line 58 of file qtrle.c.

Referenced by qtrle_decode_frame().

◆ qtrle_decode_2n4bpp()

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

Definition at line 143 of file qtrle.c.

Referenced by qtrle_decode_frame().

◆ qtrle_decode_8bpp()

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

Definition at line 202 of file qtrle.c.

Referenced by qtrle_decode_frame().

◆ qtrle_decode_16bpp()

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

Definition at line 253 of file qtrle.c.

Referenced by qtrle_decode_frame().

◆ qtrle_decode_24bpp()

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

Definition at line 299 of file qtrle.c.

Referenced by qtrle_decode_frame().

◆ qtrle_decode_32bpp()

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

Definition at line 355 of file qtrle.c.

Referenced by qtrle_decode_frame().

◆ qtrle_decode_init()

static av_cold int qtrle_decode_init ( AVCodecContext avctx)
static

Definition at line 406 of file qtrle.c.

◆ qtrle_decode_frame()

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

Definition at line 448 of file qtrle.c.

◆ qtrle_decode_flush()

static void qtrle_decode_flush ( AVCodecContext avctx)
static

Definition at line 568 of file qtrle.c.

◆ qtrle_decode_end()

static av_cold int qtrle_decode_end ( AVCodecContext avctx)
static

Definition at line 575 of file qtrle.c.

Variable Documentation

◆ ff_qtrle_decoder

const 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,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
}

Definition at line 584 of file qtrle.c.

FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:42
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
s
#define s(width, name)
Definition: cbs_vp9.c:257
qtrle_decode_init
static av_cold int qtrle_decode_init(AVCodecContext *avctx)
Definition: qtrle.c:406
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:593
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
QtrleContext
Definition: qtrle.c:43
qtrle_decode_frame
static int qtrle_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: qtrle.c:448
qtrle_decode_flush
static void qtrle_decode_flush(AVCodecContext *avctx)
Definition: qtrle.c:568
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_CODEC_ID_QTRLE
@ AV_CODEC_ID_QTRLE
Definition: codec_id.h:105
qtrle_decode_end
static av_cold int qtrle_decode_end(AVCodecContext *avctx)
Definition: qtrle.c:575