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sunrast.c
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1 /*
2  * Sun Rasterfile (.sun/.ras/im{1,8,24}/.sunras) image decoder
3  * Copyright (c) 2007, 2008 Ivo van Poorten
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/common.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/imgutils.h"
25 #include "avcodec.h"
26 #include "internal.h"
27 #include "sunrast.h"
28 
29 static int sunrast_decode_frame(AVCodecContext *avctx, void *data,
30  int *got_frame, AVPacket *avpkt)
31 {
32  const uint8_t *buf = avpkt->data;
33  const uint8_t *buf_end = avpkt->data + avpkt->size;
34  AVFrame * const p = data;
35  unsigned int w, h, depth, type, maptype, maplength, stride, x, y, len, alen;
36  uint8_t *ptr, *ptr2 = NULL;
37  const uint8_t *bufstart = buf;
38  int ret;
39 
40  if (avpkt->size < 32)
41  return AVERROR_INVALIDDATA;
42 
43  if (AV_RB32(buf) != RAS_MAGIC) {
44  av_log(avctx, AV_LOG_ERROR, "this is not sunras encoded data\n");
45  return AVERROR_INVALIDDATA;
46  }
47 
48  w = AV_RB32(buf + 4);
49  h = AV_RB32(buf + 8);
50  depth = AV_RB32(buf + 12);
51  type = AV_RB32(buf + 20);
52  maptype = AV_RB32(buf + 24);
53  maplength = AV_RB32(buf + 28);
54  buf += 32;
55 
56  if (type == RT_EXPERIMENTAL) {
57  avpriv_request_sample(avctx, "TIFF/IFF/EXPERIMENTAL (compression) type");
58  return AVERROR_PATCHWELCOME;
59  }
60  if (type > RT_FORMAT_IFF) {
61  av_log(avctx, AV_LOG_ERROR, "invalid (compression) type\n");
62  return AVERROR_INVALIDDATA;
63  }
64  if (maptype == RMT_RAW) {
65  avpriv_request_sample(avctx, "Unknown colormap type");
66  return AVERROR_PATCHWELCOME;
67  }
68  if (maptype > RMT_RAW) {
69  av_log(avctx, AV_LOG_ERROR, "invalid colormap type\n");
70  return AVERROR_INVALIDDATA;
71  }
72 
73  if (type == RT_FORMAT_TIFF || type == RT_FORMAT_IFF) {
74  av_log(avctx, AV_LOG_ERROR, "unsupported (compression) type\n");
75  return -1;
76  }
77 
78  switch (depth) {
79  case 1:
80  avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_MONOWHITE;
81  break;
82  case 4:
83  avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_NONE;
84  break;
85  case 8:
86  avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8;
87  break;
88  case 24:
90  break;
91  case 32:
93  break;
94  default:
95  av_log(avctx, AV_LOG_ERROR, "invalid depth\n");
96  return AVERROR_INVALIDDATA;
97  }
98 
99  ret = ff_set_dimensions(avctx, w, h);
100  if (ret < 0)
101  return ret;
102 
103  if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
104  return ret;
105 
107 
108  if (buf_end - buf < maplength)
109  return AVERROR_INVALIDDATA;
110 
111  if (depth > 8 && maplength) {
112  av_log(avctx, AV_LOG_WARNING, "useless colormap found or file is corrupted, trying to recover\n");
113 
114  } else if (maplength) {
115  unsigned int len = maplength / 3;
116 
117  if (maplength % 3 || maplength > 768) {
118  av_log(avctx, AV_LOG_WARNING, "invalid colormap length\n");
119  return AVERROR_INVALIDDATA;
120  }
121 
122  ptr = p->data[1];
123  for (x = 0; x < len; x++, ptr += 4)
124  *(uint32_t *)ptr = (0xFFU<<24) + (buf[x]<<16) + (buf[len+x]<<8) + buf[len+len+x];
125  }
126 
127  buf += maplength;
128 
129  if (maplength && depth < 8) {
130  ptr = ptr2 = av_malloc_array((w + 15), h);
131  if (!ptr)
132  return AVERROR(ENOMEM);
133  stride = (w + 15 >> 3) * depth;
134  } else {
135  ptr = p->data[0];
136  stride = p->linesize[0];
137  }
138 
139  /* scanlines are aligned on 16 bit boundaries */
140  len = (depth * w + 7) >> 3;
141  alen = len + (len & 1);
142 
143  if (type == RT_BYTE_ENCODED) {
144  int value, run;
145  uint8_t *end = ptr + h * stride;
146 
147  x = 0;
148  while (ptr != end && buf < buf_end) {
149  run = 1;
150  if (buf_end - buf < 1)
151  return AVERROR_INVALIDDATA;
152 
153  if ((value = *buf++) == RLE_TRIGGER) {
154  run = *buf++ + 1;
155  if (run != 1)
156  value = *buf++;
157  }
158  while (run--) {
159  if (x < len)
160  ptr[x] = value;
161  if (++x >= alen) {
162  x = 0;
163  ptr += stride;
164  if (ptr == end)
165  break;
166  }
167  }
168  }
169  } else {
170  for (y = 0; y < h; y++) {
171  if (buf_end - buf < alen)
172  break;
173  memcpy(ptr, buf, len);
174  ptr += stride;
175  buf += alen;
176  }
177  }
178  if (avctx->pix_fmt == AV_PIX_FMT_PAL8 && depth < 8) {
179  uint8_t *ptr_free = ptr2;
180  ptr = p->data[0];
181  for (y=0; y<h; y++) {
182  for (x = 0; x < (w + 7 >> 3) * depth; x++) {
183  if (depth == 1) {
184  ptr[8*x] = ptr2[x] >> 7;
185  ptr[8*x+1] = ptr2[x] >> 6 & 1;
186  ptr[8*x+2] = ptr2[x] >> 5 & 1;
187  ptr[8*x+3] = ptr2[x] >> 4 & 1;
188  ptr[8*x+4] = ptr2[x] >> 3 & 1;
189  ptr[8*x+5] = ptr2[x] >> 2 & 1;
190  ptr[8*x+6] = ptr2[x] >> 1 & 1;
191  ptr[8*x+7] = ptr2[x] & 1;
192  } else {
193  ptr[2*x] = ptr2[x] >> 4;
194  ptr[2*x+1] = ptr2[x] & 0xF;
195  }
196  }
197  ptr += p->linesize[0];
198  ptr2 += (w + 15 >> 3) * depth;
199  }
200  av_freep(&ptr_free);
201  }
202 
203  *got_frame = 1;
204 
205  return buf - bufstart;
206 }
207 
209  .name = "sunrast",
210  .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"),
211  .type = AVMEDIA_TYPE_VIDEO,
212  .id = AV_CODEC_ID_SUNRAST,
213  .decode = sunrast_decode_frame,
214  .capabilities = AV_CODEC_CAP_DR1,
215 };
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:190
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:64
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:210
#define RMT_RAW
the data layout of this map type is unknown
Definition: sunrast.h:29
#define RT_FORMAT_IFF
Definition: sunrast.h:49
int size
Definition: avcodec.h:1608
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1910
packed BGR 8:8:8, 32bpp, XBGRXBGR... X=unused/undefined
Definition: pixfmt.h:253
uint8_t run
Definition: svq3.c:206
AVCodec.
Definition: avcodec.h:3607
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:73
#define RT_FORMAT_RGB
Definition: sunrast.h:43
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
uint8_t * data
Definition: avcodec.h:1607
#define av_log(a,...)
#define U(x)
Definition: vp56_arith.h:37
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
const char * name
Name of the codec implementation.
Definition: avcodec.h:3614
int depth
Definition: v4l.c:62
#define RLE_TRIGGER
Definition: sunrast.h:39
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:264
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
#define RT_EXPERIMENTAL
Definition: sunrast.h:54
AVCodec ff_sunrast_decoder
Definition: sunrast.c:208
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:221
main external API structure.
Definition: avcodec.h:1682
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:948
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
static int sunrast_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: sunrast.c:29
#define RT_BYTE_ENCODED
Definition: sunrast.h:38
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:204
Y , 8bpp.
Definition: pixfmt.h:70
common internal api header.
common internal and external API header
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:71
int len
#define RAS_MAGIC
Definition: sunrast.h:25
#define av_freep(p)
#define av_malloc_array(a, b)
#define stride
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:251
This structure stores compressed data.
Definition: avcodec.h:1584
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:959
#define RT_FORMAT_TIFF
Definition: sunrast.h:48