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 <string.h>
#include "avcodec.h"
#include "decode.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "libavutil/attributes.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, AVFrame *rframe, int *got_frame, AVPacket *avpkt)
static av_cold void	qtrle_decode_flush (AVCodecContext *avctx)
static av_cold int	qtrle_decode_end (AVCodecContext *avctx)

Variables
const FFCodec	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.

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

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, AVFrame * rframe, int * got_frame, AVPacket * avpkt )

static

Definition at line 448 of file qtrle.c.

qtrle_decode_flush()

static av_cold void qtrle_decode_flush ( AVCodecContext * avctx )

static

Definition at line 566 of file qtrle.c.

qtrle_decode_end()

static av_cold int qtrle_decode_end ( AVCodecContext * avctx )

static

Definition at line 573 of file qtrle.c.

Variable Documentation

ff_qtrle_decoder

const FFCodec ff_qtrle_decoder

Initial value:

= {
    .p.name         = "qtrle",
    CODEC_LONG_NAME("QuickTime Animation (RLE) video"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_QTRLE,
    .priv_data_size = sizeof(QtrleContext),
    .init           = qtrle_decode_init,
    .close          = qtrle_decode_end,
    FF_CODEC_DECODE_CB(qtrle_decode_frame),
    .flush          = qtrle_decode_flush,
    .p.capabilities = AV_CODEC_CAP_DR1,
}

Definition at line 582 of file qtrle.c.