yading@10: /*
yading@10:  * Quicktime Animation (RLE) Video Decoder
yading@10:  * Copyright (C) 2004 the ffmpeg project
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * QT RLE Video Decoder by Mike Melanson (melanson@pcisys.net)
yading@10:  * For more information about the QT RLE format, visit:
yading@10:  *   http://www.pcisys.net/~melanson/codecs/
yading@10:  *
yading@10:  * The QT RLE decoder has seven modes of operation:
yading@10:  * 1, 2, 4, 8, 16, 24, and 32 bits per pixel. For modes 1, 2, 4, and 8
yading@10:  * the decoder outputs PAL8 colorspace data. 16-bit data yields RGB555
yading@10:  * data. 24-bit data is RGB24 and 32-bit data is RGB32.
yading@10:  */
yading@10: 
yading@10: #include <stdio.h>
yading@10: #include <stdlib.h>
yading@10: #include <string.h>
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "bytestream.h"
yading@10: #include "internal.h"
yading@10: 
yading@10: typedef struct QtrleContext {
yading@10:     AVCodecContext *avctx;
yading@10:     AVFrame frame;
yading@10: 
yading@10:     GetByteContext g;
yading@10:     uint32_t pal[256];
yading@10: } QtrleContext;
yading@10: 
yading@10: #define CHECK_PIXEL_PTR(n)                                                            \
yading@10:     if ((pixel_ptr + n > pixel_limit) || (pixel_ptr + n < 0)) {                       \
yading@10:         av_log (s->avctx, AV_LOG_ERROR, "Problem: pixel_ptr = %d, pixel_limit = %d\n",\
yading@10:                 pixel_ptr + n, pixel_limit);                                          \
yading@10:         return;                                                                       \
yading@10:     }                                                                                 \
yading@10: 
yading@10: static void qtrle_decode_1bpp(QtrleContext *s, int row_ptr, int lines_to_change)
yading@10: {
yading@10:     int rle_code;
yading@10:     int pixel_ptr;
yading@10:     int row_inc = s->frame.linesize[0];
yading@10:     unsigned char pi0, pi1;  /* 2 8-pixel values */
yading@10:     unsigned char *rgb = s->frame.data[0];
yading@10:     int pixel_limit = s->frame.linesize[0] * s->avctx->height;
yading@10:     int skip;
yading@10:     /* skip & 0x80 appears to mean 'start a new line', which can be interpreted
yading@10:      * as 'go to next line' during the decoding of a frame but is 'go to first
yading@10:      * line' at the beginning. Since we always interpret it as 'go to next line'
yading@10:      * in the decoding loop (which makes code simpler/faster), the first line
yading@10:      * would not be counted, so we count one more.
yading@10:      * See: https://ffmpeg.org/trac/ffmpeg/ticket/226
yading@10:      * In the following decoding loop, row_ptr will be the position of the
yading@10:      * current row. */
yading@10: 
yading@10:     row_ptr  -= row_inc;
yading@10:     pixel_ptr = row_ptr;
yading@10:     lines_to_change++;
yading@10:     while (lines_to_change) {
yading@10:         skip     =              bytestream2_get_byte(&s->g);
yading@10:         rle_code = (signed char)bytestream2_get_byte(&s->g);
yading@10:         if (rle_code == 0)
yading@10:             break;
yading@10:         if(skip & 0x80) {
yading@10:             lines_to_change--;
yading@10:             row_ptr += row_inc;
yading@10:             pixel_ptr = row_ptr + 2 * (skip & 0x7f);
yading@10:         } else
yading@10:             pixel_ptr += 2 * skip;
yading@10:         CHECK_PIXEL_PTR(0);  /* make sure pixel_ptr is positive */
yading@10: 
yading@10:         if(rle_code == -1)
yading@10:             continue;
yading@10: 
yading@10:         if (rle_code < 0) {
yading@10:             /* decode the run length code */
yading@10:             rle_code = -rle_code;
yading@10:             /* get the next 2 bytes from the stream, treat them as groups
yading@10:              * of 8 pixels, and output them rle_code times */
yading@10: 
yading@10:             pi0 = bytestream2_get_byte(&s->g);
yading@10:             pi1 = bytestream2_get_byte(&s->g);
yading@10:             CHECK_PIXEL_PTR(rle_code * 2);
yading@10: 
yading@10:             while (rle_code--) {
yading@10:                 rgb[pixel_ptr++] = pi0;
yading@10:                 rgb[pixel_ptr++] = pi1;
yading@10:             }
yading@10:         } else {
yading@10:             /* copy the same pixel directly to output 2 times */
yading@10:             rle_code *= 2;
yading@10:             CHECK_PIXEL_PTR(rle_code);
yading@10: 
yading@10:             while (rle_code--)
yading@10:                 rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: static inline void qtrle_decode_2n4bpp(QtrleContext *s, int row_ptr,
yading@10:                                        int lines_to_change, int bpp)
yading@10: {
yading@10:     int rle_code, i;
yading@10:     int pixel_ptr;
yading@10:     int row_inc = s->frame.linesize[0];
yading@10:     unsigned char pi[16];  /* 16 palette indices */
yading@10:     unsigned char *rgb = s->frame.data[0];
yading@10:     int pixel_limit = s->frame.linesize[0] * s->avctx->height;
yading@10:     int num_pixels = (bpp == 4) ? 8 : 16;
yading@10: 
yading@10:     while (lines_to_change--) {
yading@10:         pixel_ptr = row_ptr + (num_pixels * (bytestream2_get_byte(&s->g) - 1));
yading@10:         CHECK_PIXEL_PTR(0);
yading@10: 
yading@10:         while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
yading@10:             if (rle_code == 0) {
yading@10:                 /* there's another skip code in the stream */
yading@10:                 pixel_ptr += (num_pixels * (bytestream2_get_byte(&s->g) - 1));
yading@10:                 CHECK_PIXEL_PTR(0);  /* make sure pixel_ptr is positive */
yading@10:             } else if (rle_code < 0) {
yading@10:                 /* decode the run length code */
yading@10:                 rle_code = -rle_code;
yading@10:                 /* get the next 4 bytes from the stream, treat them as palette
yading@10:                  * indexes, and output them rle_code times */
yading@10:                 for (i = num_pixels-1; i >= 0; i--) {
yading@10:                     pi[num_pixels-1-i] = (bytestream2_peek_byte(&s->g) >> ((i*bpp) & 0x07)) & ((1<<bpp)-1);
yading@10:                     bytestream2_skip(&s->g, ((i & ((num_pixels>>2)-1)) == 0));
yading@10:                 }
yading@10:                 CHECK_PIXEL_PTR(rle_code * num_pixels);
yading@10:                 while (rle_code--) {
yading@10:                     for (i = 0; i < num_pixels; i++)
yading@10:                         rgb[pixel_ptr++] = pi[i];
yading@10:                 }
yading@10:             } else {
yading@10:                 /* copy the same pixel directly to output 4 times */
yading@10:                 rle_code *= 4;
yading@10:                 CHECK_PIXEL_PTR(rle_code*(num_pixels>>2));
yading@10:                 while (rle_code--) {
yading@10:                     if(bpp == 4) {
yading@10:                         int x = bytestream2_get_byte(&s->g);
yading@10:                         rgb[pixel_ptr++] = (x >> 4) & 0x0f;
yading@10:                         rgb[pixel_ptr++] =  x       & 0x0f;
yading@10:                     } else {
yading@10:                         int x = bytestream2_get_byte(&s->g);
yading@10:                         rgb[pixel_ptr++] = (x >> 6) & 0x03;
yading@10:                         rgb[pixel_ptr++] = (x >> 4) & 0x03;
yading@10:                         rgb[pixel_ptr++] = (x >> 2) & 0x03;
yading@10:                         rgb[pixel_ptr++] =  x       & 0x03;
yading@10:                     }
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:         row_ptr += row_inc;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void qtrle_decode_8bpp(QtrleContext *s, int row_ptr, int lines_to_change)
yading@10: {
yading@10:     int rle_code;
yading@10:     int pixel_ptr;
yading@10:     int row_inc = s->frame.linesize[0];
yading@10:     unsigned char pi1, pi2, pi3, pi4;  /* 4 palette indexes */
yading@10:     unsigned char *rgb = s->frame.data[0];
yading@10:     int pixel_limit = s->frame.linesize[0] * s->avctx->height;
yading@10: 
yading@10:     while (lines_to_change--) {
yading@10:         pixel_ptr = row_ptr + (4 * (bytestream2_get_byte(&s->g) - 1));
yading@10:         CHECK_PIXEL_PTR(0);
yading@10: 
yading@10:         while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
yading@10:             if (rle_code == 0) {
yading@10:                 /* there's another skip code in the stream */
yading@10:                 pixel_ptr += (4 * (bytestream2_get_byte(&s->g) - 1));
yading@10:                 CHECK_PIXEL_PTR(0);  /* make sure pixel_ptr is positive */
yading@10:             } else if (rle_code < 0) {
yading@10:                 /* decode the run length code */
yading@10:                 rle_code = -rle_code;
yading@10:                 /* get the next 4 bytes from the stream, treat them as palette
yading@10:                  * indexes, and output them rle_code times */
yading@10:                 pi1 = bytestream2_get_byte(&s->g);
yading@10:                 pi2 = bytestream2_get_byte(&s->g);
yading@10:                 pi3 = bytestream2_get_byte(&s->g);
yading@10:                 pi4 = bytestream2_get_byte(&s->g);
yading@10: 
yading@10:                 CHECK_PIXEL_PTR(rle_code * 4);
yading@10: 
yading@10:                 while (rle_code--) {
yading@10:                     rgb[pixel_ptr++] = pi1;
yading@10:                     rgb[pixel_ptr++] = pi2;
yading@10:                     rgb[pixel_ptr++] = pi3;
yading@10:                     rgb[pixel_ptr++] = pi4;
yading@10:                 }
yading@10:             } else {
yading@10:                 /* copy the same pixel directly to output 4 times */
yading@10:                 rle_code *= 4;
yading@10:                 CHECK_PIXEL_PTR(rle_code);
yading@10: 
yading@10:                 while (rle_code--) {
yading@10:                     rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:         row_ptr += row_inc;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void qtrle_decode_16bpp(QtrleContext *s, int row_ptr, int lines_to_change)
yading@10: {
yading@10:     int rle_code;
yading@10:     int pixel_ptr;
yading@10:     int row_inc = s->frame.linesize[0];
yading@10:     unsigned short rgb16;
yading@10:     unsigned char *rgb = s->frame.data[0];
yading@10:     int pixel_limit = s->frame.linesize[0] * s->avctx->height;
yading@10: 
yading@10:     while (lines_to_change--) {
yading@10:         pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 2;
yading@10:         CHECK_PIXEL_PTR(0);
yading@10: 
yading@10:         while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
yading@10:             if (rle_code == 0) {
yading@10:                 /* there's another skip code in the stream */
yading@10:                 pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 2;
yading@10:                 CHECK_PIXEL_PTR(0);  /* make sure pixel_ptr is positive */
yading@10:             } else if (rle_code < 0) {
yading@10:                 /* decode the run length code */
yading@10:                 rle_code = -rle_code;
yading@10:                 rgb16 = bytestream2_get_be16(&s->g);
yading@10: 
yading@10:                 CHECK_PIXEL_PTR(rle_code * 2);
yading@10: 
yading@10:                 while (rle_code--) {
yading@10:                     *(unsigned short *)(&rgb[pixel_ptr]) = rgb16;
yading@10:                     pixel_ptr += 2;
yading@10:                 }
yading@10:             } else {
yading@10:                 CHECK_PIXEL_PTR(rle_code * 2);
yading@10: 
yading@10:                 /* copy pixels directly to output */
yading@10:                 while (rle_code--) {
yading@10:                     rgb16 = bytestream2_get_be16(&s->g);
yading@10:                     *(unsigned short *)(&rgb[pixel_ptr]) = rgb16;
yading@10:                     pixel_ptr += 2;
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:         row_ptr += row_inc;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change)
yading@10: {
yading@10:     int rle_code;
yading@10:     int pixel_ptr;
yading@10:     int row_inc = s->frame.linesize[0];
yading@10:     unsigned char r, g, b;
yading@10:     unsigned char *rgb = s->frame.data[0];
yading@10:     int pixel_limit = s->frame.linesize[0] * s->avctx->height;
yading@10: 
yading@10:     while (lines_to_change--) {
yading@10:         pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 3;
yading@10:         CHECK_PIXEL_PTR(0);
yading@10: 
yading@10:         while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
yading@10:             if (rle_code == 0) {
yading@10:                 /* there's another skip code in the stream */
yading@10:                 pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 3;
yading@10:                 CHECK_PIXEL_PTR(0);  /* make sure pixel_ptr is positive */
yading@10:             } else if (rle_code < 0) {
yading@10:                 /* decode the run length code */
yading@10:                 rle_code = -rle_code;
yading@10:                 r = bytestream2_get_byte(&s->g);
yading@10:                 g = bytestream2_get_byte(&s->g);
yading@10:                 b = bytestream2_get_byte(&s->g);
yading@10: 
yading@10:                 CHECK_PIXEL_PTR(rle_code * 3);
yading@10: 
yading@10:                 while (rle_code--) {
yading@10:                     rgb[pixel_ptr++] = r;
yading@10:                     rgb[pixel_ptr++] = g;
yading@10:                     rgb[pixel_ptr++] = b;
yading@10:                 }
yading@10:             } else {
yading@10:                 CHECK_PIXEL_PTR(rle_code * 3);
yading@10: 
yading@10:                 /* copy pixels directly to output */
yading@10:                 while (rle_code--) {
yading@10:                     rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
yading@10:                     rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
yading@10:                     rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:         row_ptr += row_inc;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change)
yading@10: {
yading@10:     int rle_code;
yading@10:     int pixel_ptr;
yading@10:     int row_inc = s->frame.linesize[0];
yading@10:     unsigned int argb;
yading@10:     unsigned char *rgb = s->frame.data[0];
yading@10:     int pixel_limit = s->frame.linesize[0] * s->avctx->height;
yading@10: 
yading@10:     while (lines_to_change--) {
yading@10:         pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 4;
yading@10:         CHECK_PIXEL_PTR(0);
yading@10: 
yading@10:         while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
yading@10:             if (rle_code == 0) {
yading@10:                 /* there's another skip code in the stream */
yading@10:                 pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 4;
yading@10:                 CHECK_PIXEL_PTR(0);  /* make sure pixel_ptr is positive */
yading@10:             } else if (rle_code < 0) {
yading@10:                 /* decode the run length code */
yading@10:                 rle_code = -rle_code;
yading@10:                 argb = bytestream2_get_be32(&s->g);
yading@10: 
yading@10:                 CHECK_PIXEL_PTR(rle_code * 4);
yading@10: 
yading@10:                 while (rle_code--) {
yading@10:                     AV_WN32A(rgb + pixel_ptr, argb);
yading@10:                     pixel_ptr += 4;
yading@10:                 }
yading@10:             } else {
yading@10:                 CHECK_PIXEL_PTR(rle_code * 4);
yading@10: 
yading@10:                 /* copy pixels directly to output */
yading@10:                 while (rle_code--) {
yading@10:                     argb = bytestream2_get_be32(&s->g);
yading@10:                     AV_WN32A(rgb + pixel_ptr, argb);
yading@10:                     pixel_ptr  += 4;
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:         row_ptr += row_inc;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static av_cold int qtrle_decode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     QtrleContext *s = avctx->priv_data;
yading@10: 
yading@10:     s->avctx = avctx;
yading@10:     switch (avctx->bits_per_coded_sample) {
yading@10:     case 1:
yading@10:     case 33:
yading@10:         avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
yading@10:         break;
yading@10: 
yading@10:     case 2:
yading@10:     case 4:
yading@10:     case 8:
yading@10:     case 34:
yading@10:     case 36:
yading@10:     case 40:
yading@10:         avctx->pix_fmt = AV_PIX_FMT_PAL8;
yading@10:         break;
yading@10: 
yading@10:     case 16:
yading@10:         avctx->pix_fmt = AV_PIX_FMT_RGB555;
yading@10:         break;
yading@10: 
yading@10:     case 24:
yading@10:         avctx->pix_fmt = AV_PIX_FMT_RGB24;
yading@10:         break;
yading@10: 
yading@10:     case 32:
yading@10:         avctx->pix_fmt = AV_PIX_FMT_RGB32;
yading@10:         break;
yading@10: 
yading@10:     default:
yading@10:         av_log (avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
yading@10:             avctx->bits_per_coded_sample);
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10: 
yading@10:     avcodec_get_frame_defaults(&s->frame);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int qtrle_decode_frame(AVCodecContext *avctx,
yading@10:                               void *data, int *got_frame,
yading@10:                               AVPacket *avpkt)
yading@10: {
yading@10:     QtrleContext *s = avctx->priv_data;
yading@10:     int header, start_line;
yading@10:     int height, row_ptr;
yading@10:     int has_palette = 0;
yading@10:     int ret;
yading@10: 
yading@10:     bytestream2_init(&s->g, avpkt->data, avpkt->size);
yading@10:     if ((ret = ff_reget_buffer(avctx, &s->frame)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     /* check if this frame is even supposed to change */
yading@10:     if (avpkt->size < 8)
yading@10:         goto done;
yading@10: 
yading@10:     /* start after the chunk size */
yading@10:     bytestream2_seek(&s->g, 4, SEEK_SET);
yading@10: 
yading@10:     /* fetch the header */
yading@10:     header = bytestream2_get_be16(&s->g);
yading@10: 
yading@10:     /* if a header is present, fetch additional decoding parameters */
yading@10:     if (header & 0x0008) {
yading@10:         if (avpkt->size < 14)
yading@10:             goto done;
yading@10:         start_line = bytestream2_get_be16(&s->g);
yading@10:         bytestream2_skip(&s->g, 2);
yading@10:         height     = bytestream2_get_be16(&s->g);
yading@10:         bytestream2_skip(&s->g, 2);
yading@10:         if (height > s->avctx->height - start_line)
yading@10:             goto done;
yading@10:     } else {
yading@10:         start_line = 0;
yading@10:         height     = s->avctx->height;
yading@10:     }
yading@10:     row_ptr = s->frame.linesize[0] * start_line;
yading@10: 
yading@10:     switch (avctx->bits_per_coded_sample) {
yading@10:     case 1:
yading@10:     case 33:
yading@10:         qtrle_decode_1bpp(s, row_ptr, height);
yading@10:         break;
yading@10: 
yading@10:     case 2:
yading@10:     case 34:
yading@10:         qtrle_decode_2n4bpp(s, row_ptr, height, 2);
yading@10:         has_palette = 1;
yading@10:         break;
yading@10: 
yading@10:     case 4:
yading@10:     case 36:
yading@10:         qtrle_decode_2n4bpp(s, row_ptr, height, 4);
yading@10:         has_palette = 1;
yading@10:         break;
yading@10: 
yading@10:     case 8:
yading@10:     case 40:
yading@10:         qtrle_decode_8bpp(s, row_ptr, height);
yading@10:         has_palette = 1;
yading@10:         break;
yading@10: 
yading@10:     case 16:
yading@10:         qtrle_decode_16bpp(s, row_ptr, height);
yading@10:         break;
yading@10: 
yading@10:     case 24:
yading@10:         qtrle_decode_24bpp(s, row_ptr, height);
yading@10:         break;
yading@10: 
yading@10:     case 32:
yading@10:         qtrle_decode_32bpp(s, row_ptr, height);
yading@10:         break;
yading@10: 
yading@10:     default:
yading@10:         av_log (s->avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
yading@10:             avctx->bits_per_coded_sample);
yading@10:         break;
yading@10:     }
yading@10: 
yading@10:     if(has_palette) {
yading@10:         const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
yading@10: 
yading@10:         if (pal) {
yading@10:             s->frame.palette_has_changed = 1;
yading@10:             memcpy(s->pal, pal, AVPALETTE_SIZE);
yading@10:         }
yading@10: 
yading@10:         /* make the palette available on the way out */
yading@10:         memcpy(s->frame.data[1], s->pal, AVPALETTE_SIZE);
yading@10:     }
yading@10: 
yading@10: done:
yading@10:     if ((ret = av_frame_ref(data, &s->frame)) < 0)
yading@10:         return ret;
yading@10:     *got_frame      = 1;
yading@10: 
yading@10:     /* always report that the buffer was completely consumed */
yading@10:     return avpkt->size;
yading@10: }
yading@10: 
yading@10: static av_cold int qtrle_decode_end(AVCodecContext *avctx)
yading@10: {
yading@10:     QtrleContext *s = avctx->priv_data;
yading@10: 
yading@10:     av_frame_unref(&s->frame);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: AVCodec ff_qtrle_decoder = {
yading@10:     .name           = "qtrle",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_QTRLE,
yading@10:     .priv_data_size = sizeof(QtrleContext),
yading@10:     .init           = qtrle_decode_init,
yading@10:     .close          = qtrle_decode_end,
yading@10:     .decode         = qtrle_decode_frame,
yading@10:     .capabilities   = CODEC_CAP_DR1,
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"),
yading@10: };