hvirtual/quicktime/ffmpeg/libavcodec/qtrle.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "avcodec.h"
#include "dsputil.h"

Include dependency graph for qtrle.c:

Go to the source code of this file.

Data Structures

struct  QtrleContext

Defines

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

Functions

static void qtrle_decode_1bpp (QtrleContext *s)
static void qtrle_decode_2bpp (QtrleContext *s)
static void qtrle_decode_4bpp (QtrleContext *s)
static void qtrle_decode_8bpp (QtrleContext *s)
static void qtrle_decode_16bpp (QtrleContext *s)
static void qtrle_decode_24bpp (QtrleContext *s)
static void qtrle_decode_32bpp (QtrleContext *s)
static int qtrle_decode_init (AVCodecContext *avctx)
static int qtrle_decode_frame (AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
static int qtrle_decode_end (AVCodecContext *avctx)

Variables

AVCodec qtrle_decoder

Detailed Description

QT RLE Video Decoder by Mike Melanson (melanson@pcisys.net) 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 RGBA32.

Definition in file qtrle.c.

Define Documentation

#define CHECK_PIXEL_PTR ( n   ) 

Value:

if (pixel_ptr + n > pixel_limit) { \
    av_log (s->avctx, AV_LOG_INFO, "Problem: pixel_ptr >= pixel_limit (%d >= %d)\n", \
      pixel_ptr + n, pixel_limit); \
    return; \
  } \

Definition at line 60 of file qtrle.c.

Referenced by qtrle_decode_16bpp(), qtrle_decode_24bpp(), qtrle_decode_32bpp(), qtrle_decode_4bpp(), 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 53 of file qtrle.c.

Function Documentation

static void qtrle_decode_16bpp ( QtrleContext *  s  )  [static]

Definition at line 246 of file qtrle.c.

References QtrleContext::avctx, BE_16, QtrleContext::buf, CHECK_PIXEL_PTR, CHECK_STREAM_PTR, QtrleContext::frame, header, AVCodecContext::height, and QtrleContext::size.

Referenced by qtrle_decode_frame().

static void qtrle_decode_1bpp ( QtrleContext *  s  )  [static]

Definition at line 67 of file qtrle.c.

Referenced by qtrle_decode_frame().

static void qtrle_decode_24bpp ( QtrleContext *  s  )  [static]

Definition at line 323 of file qtrle.c.

References QtrleContext::avctx, b, BE_16, QtrleContext::buf, CHECK_PIXEL_PTR, CHECK_STREAM_PTR, QtrleContext::frame, header, AVCodecContext::height, r, and QtrleContext::size.

Referenced by qtrle_decode_frame().

static void qtrle_decode_2bpp ( QtrleContext *  s  )  [static]

Definition at line 71 of file qtrle.c.

Referenced by qtrle_decode_frame().

static void qtrle_decode_32bpp ( QtrleContext *  s  )  [static]

Definition at line 401 of file qtrle.c.

References QtrleContext::avctx, b, BE_16, QtrleContext::buf, CHECK_PIXEL_PTR, CHECK_STREAM_PTR, QtrleContext::frame, header, AVCodecContext::height, r, and QtrleContext::size.

Referenced by qtrle_decode_frame().

static void qtrle_decode_4bpp ( QtrleContext *  s  )  [static]

Definition at line 75 of file qtrle.c.

References QtrleContext::avctx, BE_16, QtrleContext::buf, CHECK_PIXEL_PTR, CHECK_STREAM_PTR, QtrleContext::frame, header, AVCodecContext::height, and QtrleContext::size.

Referenced by qtrle_decode_frame().

static void qtrle_decode_8bpp ( QtrleContext *  s  )  [static]

Definition at line 165 of file qtrle.c.

References QtrleContext::avctx, BE_16, QtrleContext::buf, CHECK_PIXEL_PTR, CHECK_STREAM_PTR, QtrleContext::frame, header, AVCodecContext::height, and QtrleContext::size.

Referenced by qtrle_decode_frame().

static int qtrle_decode_end ( AVCodecContext *  avctx  )  [static]

Definition at line 602 of file qtrle.c.

References QtrleContext::frame, AVCodecContext::priv_data, AVCodecContext::release_buffer, and s.

static int qtrle_decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  data_size,
uint8_t *  buf,
int  buf_size 
) [static]

Definition at line 527 of file qtrle.c.

References av_log(), AV_LOG_ERROR, QtrleContext::avctx, AVPALETTE_SIZE, AVCodecContext::bits_per_sample, QtrleContext::buf, FF_BUFFER_HINTS_PRESERVE, FF_BUFFER_HINTS_READABLE, FF_BUFFER_HINTS_REUSABLE, FF_BUFFER_HINTS_VALID, QtrleContext::frame, memcpy, AVCodecContext::palctrl, AVPaletteControl::palette, AVPaletteControl::palette_changed, AVCodecContext::priv_data, qtrle_decode_16bpp(), qtrle_decode_1bpp(), qtrle_decode_24bpp(), qtrle_decode_2bpp(), qtrle_decode_32bpp(), qtrle_decode_4bpp(), qtrle_decode_8bpp(), AVCodecContext::reget_buffer, s, and QtrleContext::size.

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static int qtrle_decode_init ( AVCodecContext *  avctx  )  [static]

Definition at line 485 of file qtrle.c.

References av_log(), AV_LOG_ERROR, QtrleContext::avctx, AVCodecContext::bits_per_sample, QtrleContext::dsp, dsputil_init(), QtrleContext::frame, AVCodecContext::has_b_frames, NULL, AVCodecContext::pix_fmt, PIX_FMT_PAL8, PIX_FMT_RGB24, PIX_FMT_RGB555, PIX_FMT_RGBA32, AVCodecContext::priv_data, and s.

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Variable Documentation

AVCodec qtrle_decoder

Initial value:

 {
    "qtrle",
    CODEC_TYPE_VIDEO,
    CODEC_ID_QTRLE,
    sizeof(QtrleContext),
    qtrle_decode_init,
    NULL,
    qtrle_decode_end,
    qtrle_decode_frame,
    CODEC_CAP_DR1,
}

Definition at line 612 of file qtrle.c.

Referenced by avcodec_register_all().

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