FFmpeg
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:295
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
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:68
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:104
#define avpriv_request_sample(...)
#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:1478
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1775
GLint GLenum type
Definition: opengl_enc.c:104
packed BGR 8:8:8, 32bpp, XBGRXBGR... X=unused/undefined
Definition: pixfmt.h:239
uint8_t run
Definition: svq3.c:206
AVCodec.
Definition: avcodec.h:3481
uint8_t
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
#define RT_FORMAT_RGB
Definition: sunrast.h:43
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:108
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:1477
#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 NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
const char * name
Name of the codec implementation.
Definition: avcodec.h:3488
#define RLE_TRIGGER
Definition: sunrast.h:39
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:378
uint8_t w
Definition: llviddspenc.c:38
#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:69
#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:326
main external API structure.
Definition: avcodec.h:1565
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1964
void * buf
Definition: avisynth_c.h:766
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:309
Y , 8bpp.
Definition: pixfmt.h:74
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:75
int len
#define RAS_MAGIC
Definition: sunrast.h:25
#define av_freep(p)
#define av_malloc_array(a, b)
#define stride
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:237
This structure stores compressed data.
Definition: avcodec.h:1454
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:981
#define RT_FORMAT_TIFF
Definition: sunrast.h:48