FFmpeg
brenderpix.c
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1 /*
2  * BRender PIX (.pix) image decoder
3  * Copyright (c) 2012 Aleksi Nurmi
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 /* Tested against samples from I-War / Independence War and Defiance. */
23 
24 #include "libavutil/imgutils.h"
25 
26 #include "avcodec.h"
27 #include "bytestream.h"
28 #include "codec_internal.h"
29 #include "internal.h"
30 
31 #define HEADER1_CHUNK 0x03
32 #define HEADER2_CHUNK 0x3D
33 #define IMAGE_DATA_CHUNK 0x21
34 
35 /* In 8-bit colour mode, 256 colours are available at any time. Which 256
36  * colours are available is determined by the contents of the hardware palette
37  * (or CLUT). In this case, the palette supplied with BRender (std.pal) has
38  * been loaded into the CLUT.
39  *
40  * The 256 colours in std.pal are divided into seven ranges, or `colour ramps'.
41  * The first 64 colours represent shades of grey ranging from very dark grey
42  * (black) to very light grey (white). The following colours are 32-element
43  * ramps for six colours as shown below.
44  */
45 static const uint32_t std_pal_table[256] = {
46  // gray
47  0xFF000000, 0xFF030303, 0xFF060606, 0xFF090909, 0xFF0C0C0C, 0xFF0F0F0F,
48  0xFF121212, 0xFF151515, 0xFF181818, 0xFF1B1B1B, 0xFF1E1E1E, 0xFF212121,
49  0xFF242424, 0xFF272727, 0xFF2A2A2A, 0xFF2D2D2D, 0xFF313131, 0xFF343434,
50  0xFF373737, 0xFF3A3A3A, 0xFF3D3D3D, 0xFF404040, 0xFF434343, 0xFF464646,
51  0xFF494949, 0xFF4C4C4C, 0xFF4F4F4F, 0xFF525252, 0xFF555555, 0xFF585858,
52  0xFF5B5B5B, 0xFF5E5E5E, 0xFF626262, 0xFF656565, 0xFF686868, 0xFF6B6B6B,
53  0xFF6E6E6E, 0xFF717171, 0xFF747474, 0xFF777777, 0xFF7A7A7A, 0xFF7D7D7D,
54  0xFF808080, 0xFF838383, 0xFF868686, 0xFF898989, 0xFF8C8C8C, 0xFF8F8F8F,
55  0xFF939393, 0xFF999999, 0xFFA0A0A0, 0xFFA7A7A7, 0xFFAEAEAE, 0xFFB4B4B4,
56  0xFFBBBBBB, 0xFFC2C2C2, 0xFFC9C9C9, 0xFFCFCFCF, 0xFFD6D6D6, 0xFFDDDDDD,
57  0xFFE4E4E4, 0xFFEAEAEA, 0xFFF1F1F1, 0xFFF8F8F8,
58 
59  // blue
60  0xFF000000, 0xFF020209, 0xFF050513, 0xFF07071D, 0xFF0A0A27, 0xFF0C0C31,
61  0xFF0F0F3B, 0xFF111145, 0xFF14144F, 0xFF161659, 0xFF181863, 0xFF1B1B6D,
62  0xFF1E1E77, 0xFF202080, 0xFF22228A, 0xFF252594, 0xFF28289E, 0xFF2A2AA8,
63  0xFF2D2DB2, 0xFF2F2FBC, 0xFF3131C6, 0xFF3434D0, 0xFF3737DA, 0xFF3939E4,
64  0xFF3C3CEE, 0xFF5454F0, 0xFF6C6CF2, 0xFF8585F4, 0xFF9D9DF6, 0xFFB5B5F8,
65  0xFFCECEFA, 0xFFE6E6FC,
66 
67  // green
68  0xFF000000, 0xFF020902, 0xFF051305, 0xFF071D07, 0xFF0A270A, 0xFF0C310C,
69  0xFF0F3B0F, 0xFF114511, 0xFF144F14, 0xFF165916, 0xFF186318, 0xFF1B6D1B,
70  0xFF1E771E, 0xFF208020, 0xFF228A22, 0xFF259425, 0xFF289E28, 0xFF2AA82A,
71  0xFF2DB22D, 0xFF2FBC2F, 0xFF31C631, 0xFF34D034, 0xFF37DA37, 0xFF39E439,
72  0xFF3CEE3C, 0xFF54F054, 0xFF6CF26C, 0xFF85F485, 0xFF9DF69D, 0xFFB5F8B5,
73  0xFFCEFACE, 0xFFE6FCE6,
74 
75  // cyan
76  0xFF000000, 0xFF020909, 0xFF051313, 0xFF071D1D, 0xFF0A2727, 0xFF0C3131,
77  0xFF0F3B3B, 0xFF114545, 0xFF144F4F, 0xFF165959, 0xFF186363, 0xFF1B6D6D,
78  0xFF1E7777, 0xFF208080, 0xFF228A8A, 0xFF259494, 0xFF289E9E, 0xFF2AA8A8,
79  0xFF2DB2B2, 0xFF2FBCBC, 0xFF31C6C6, 0xFF34D0D0, 0xFF37DADA, 0xFF39E4E4,
80  0xFF3CEEEE, 0xFF54F0F0, 0xFF6CF2F2, 0xFF85F4F4, 0xFF9DF6F6, 0xFFB5F8F8,
81  0xFFCEFAFA, 0xFFE6FCFC,
82 
83  // red
84  0xFF000000, 0xFF090202, 0xFF130505, 0xFF1D0707, 0xFF270A0A, 0xFF310C0C,
85  0xFF3B0F0F, 0xFF451111, 0xFF4F1414, 0xFF591616, 0xFF631818, 0xFF6D1B1B,
86  0xFF771E1E, 0xFF802020, 0xFF8A2222, 0xFF942525, 0xFF9E2828, 0xFFA82A2A,
87  0xFFB22D2D, 0xFFBC2F2F, 0xFFC63131, 0xFFD03434, 0xFFDA3737, 0xFFE43939,
88  0xFFEE3C3C, 0xFFF05454, 0xFFF26C6C, 0xFFF48585, 0xFFF69D9D, 0xFFF8B5B5,
89  0xFFFACECE, 0xFFFCE6E6,
90 
91  // magenta
92  0xFF000000, 0xFF090209, 0xFF130513, 0xFF1D071D, 0xFF270A27, 0xFF310C31,
93  0xFF3B0F3B, 0xFF451145, 0xFF4F144F, 0xFF591659, 0xFF631863, 0xFF6D1B6D,
94  0xFF771E77, 0xFF802080, 0xFF8A228A, 0xFF942594, 0xFF9E289E, 0xFFA82AA8,
95  0xFFB22DB2, 0xFFBC2FBC, 0xFFC631C6, 0xFFD034D0, 0xFFDA37DA, 0xFFE439E4,
96  0xFFEE3CEE, 0xFFF054F0, 0xFFF26CF2, 0xFFF485F4, 0xFFF69DF6, 0xFFF8B5F8,
97  0xFFFACEFA, 0xFFFCE6FC,
98 
99  // yellow
100  0xFF000000, 0xFF090902, 0xFF131305, 0xFF1D1D07, 0xFF27270A, 0xFF31310C,
101  0xFF3B3B0F, 0xFF454511, 0xFF4F4F14, 0xFF595916, 0xFF636318, 0xFF6D6D1B,
102  0xFF77771E, 0xFF808020, 0xFF8A8A22, 0xFF949425, 0xFF9E9E28, 0xFFA8A82A,
103  0xFFB2B22D, 0xFFBCBC2F, 0xFFC6C631, 0xFFD0D034, 0xFFDADA37, 0xFFE4E439,
104  0xFFEEEE3C, 0xFFF0F054, 0xFFF2F26C, 0xFFF4F485, 0xFFF6F69D, 0xFFF8F8B5,
105  0xFFFAFACE, 0xFFFCFCE6,
106 };
107 
108 typedef struct PixHeader {
109  int width;
110  int height;
111  int format;
112 } PixHeader;
113 
114 static int pix_decode_header(PixHeader *out, GetByteContext *pgb)
115 {
116  unsigned int header_len = bytestream2_get_be32(pgb);
117 
118  out->format = bytestream2_get_byte(pgb);
119  bytestream2_skip(pgb, 2);
120  out->width = bytestream2_get_be16(pgb);
121  out->height = bytestream2_get_be16(pgb);
122 
123  // the header is at least 11 bytes long; we read the first 7
124  if (header_len < 11)
125  return AVERROR_INVALIDDATA;
126 
127  // skip the rest of the header
128  bytestream2_skip(pgb, header_len - 7);
129 
130  return 0;
131 }
132 
133 static int pix_decode_frame(AVCodecContext *avctx, AVFrame *frame,
134  int *got_frame, AVPacket *avpkt)
135 {
136  int ret, i;
137  GetByteContext gb;
138 
139  unsigned int bytes_pp;
140  unsigned int magic[4];
141  unsigned int chunk_type;
142  unsigned int data_len;
143  unsigned int bytes_per_scanline;
144  unsigned int bytes_left;
145  PixHeader hdr;
146 
147  bytestream2_init(&gb, avpkt->data, avpkt->size);
148 
149  magic[0] = bytestream2_get_be32(&gb);
150  magic[1] = bytestream2_get_be32(&gb);
151  magic[2] = bytestream2_get_be32(&gb);
152  magic[3] = bytestream2_get_be32(&gb);
153 
154  if (magic[0] != 0x12 ||
155  magic[1] != 0x08 ||
156  magic[2] != 0x02 ||
157  magic[3] != 0x02) {
158  av_log(avctx, AV_LOG_ERROR, "Not a BRender PIX file.\n");
159  return AVERROR_INVALIDDATA;
160  }
161 
162  chunk_type = bytestream2_get_be32(&gb);
163  if (chunk_type != HEADER1_CHUNK && chunk_type != HEADER2_CHUNK) {
164  av_log(avctx, AV_LOG_ERROR, "Invalid chunk type %d.\n", chunk_type);
165  return AVERROR_INVALIDDATA;
166  }
167 
168  ret = pix_decode_header(&hdr, &gb);
169  if (ret < 0) {
170  av_log(avctx, AV_LOG_ERROR, "Invalid header length.\n");
171  return ret;
172  }
173  switch (hdr.format) {
174  case 3:
175  avctx->pix_fmt = AV_PIX_FMT_PAL8;
176  bytes_pp = 1;
177  break;
178  case 4:
179  avctx->pix_fmt = AV_PIX_FMT_RGB555BE;
180  bytes_pp = 2;
181  break;
182  case 5:
183  avctx->pix_fmt = AV_PIX_FMT_RGB565BE;
184  bytes_pp = 2;
185  break;
186  case 6:
187  avctx->pix_fmt = AV_PIX_FMT_RGB24;
188  bytes_pp = 3;
189  break;
190  case 7:
191  avctx->pix_fmt = AV_PIX_FMT_0RGB;
192  bytes_pp = 4;
193  break;
194  case 8: // ARGB
195  avctx->pix_fmt = AV_PIX_FMT_ARGB;
196  bytes_pp = 4;
197  break;
198  case 18:
199  avctx->pix_fmt = AV_PIX_FMT_YA8;
200  bytes_pp = 2;
201  break;
202  default:
203  avpriv_request_sample(avctx, "Format %d", hdr.format);
204  return AVERROR_PATCHWELCOME;
205  }
206  bytes_per_scanline = bytes_pp * hdr.width;
207 
208  if (bytestream2_get_bytes_left(&gb) < hdr.height * bytes_per_scanline)
209  return AVERROR_INVALIDDATA;
210 
211  if ((ret = ff_set_dimensions(avctx, hdr.width, hdr.height)) < 0)
212  return ret;
213 
214  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
215  return ret;
216 
217  chunk_type = bytestream2_get_be32(&gb);
218 
219  if (avctx->pix_fmt == AV_PIX_FMT_PAL8 &&
220  (chunk_type == HEADER1_CHUNK ||
221  chunk_type == HEADER2_CHUNK)) {
222  /* read palette data from data[1] */
223  PixHeader palhdr;
224  uint32_t *pal_out = (uint32_t *)frame->data[1];
225 
226  ret = pix_decode_header(&palhdr, &gb);
227  if (ret < 0) {
228  av_log(avctx, AV_LOG_ERROR, "Invalid palette header length.\n");
229  return ret;
230  }
231  if (palhdr.format != 7)
232  avpriv_request_sample(avctx, "Palette not in RGB format");
233 
234  chunk_type = bytestream2_get_be32(&gb);
235  data_len = bytestream2_get_be32(&gb);
236  bytestream2_skip(&gb, 8);
237  if (chunk_type != IMAGE_DATA_CHUNK || data_len != 1032 ||
238  bytestream2_get_bytes_left(&gb) < 1032) {
239  av_log(avctx, AV_LOG_ERROR, "Invalid palette data.\n");
240  return AVERROR_INVALIDDATA;
241  }
242  // palette data is surrounded by 8 null bytes (both top and bottom)
243  // convert 0RGB to machine endian format (ARGB32)
244  for (i = 0; i < 256; ++i)
245  *pal_out++ = (0xFFU << 24) | bytestream2_get_be32u(&gb);
246  bytestream2_skip(&gb, 8);
247 
248  frame->palette_has_changed = 1;
249 
250  chunk_type = bytestream2_get_be32(&gb);
251  } else if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
252  /* no palette supplied, use the default one */
253  uint32_t *pal_out = (uint32_t *)frame->data[1];
254 
255  // TODO: add an AVOption to load custom palette files
256  av_log(avctx, AV_LOG_WARNING,
257  "Using default palette, colors might be off.\n");
258  memcpy(pal_out, std_pal_table, sizeof(uint32_t) * 256);
259 
260  frame->palette_has_changed = 1;
261  }
262 
263  data_len = bytestream2_get_be32(&gb);
264  bytestream2_skip(&gb, 8);
265 
266  // read the image data to the buffer
267  bytes_left = bytestream2_get_bytes_left(&gb);
268 
269  if (chunk_type != IMAGE_DATA_CHUNK || data_len != bytes_left ||
270  bytes_left / bytes_per_scanline < hdr.height) {
271  av_log(avctx, AV_LOG_ERROR, "Invalid image data.\n");
272  return AVERROR_INVALIDDATA;
273  }
274 
275  av_image_copy_plane(frame->data[0], frame->linesize[0],
276  avpkt->data + bytestream2_tell(&gb),
277  bytes_per_scanline,
278  bytes_per_scanline, hdr.height);
279 
280  frame->pict_type = AV_PICTURE_TYPE_I;
281  frame->key_frame = 1;
282  *got_frame = 1;
283 
284  return avpkt->size;
285 }
286 
287 const FFCodec ff_brender_pix_decoder = {
288  .p.name = "brender_pix",
289  .p.long_name = NULL_IF_CONFIG_SMALL("BRender PIX image"),
290  .p.type = AVMEDIA_TYPE_VIDEO,
291  .p.id = AV_CODEC_ID_BRENDER_PIX,
292  .p.capabilities = AV_CODEC_CAP_DR1,
293  FF_CODEC_DECODE_CB(pix_decode_frame),
294 };
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
pix_decode_header
static int pix_decode_header(PixHeader *out, GetByteContext *pgb)
Definition: brenderpix.c:114
AV_PIX_FMT_YA8
@ AV_PIX_FMT_YA8
8 bits gray, 8 bits alpha
Definition: pixfmt.h:133
out
FILE * out
Definition: movenc.c:54
GetByteContext
Definition: bytestream.h:33
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:374
FFCodec
Definition: codec_internal.h:112
AV_PIX_FMT_RGB555BE
@ AV_PIX_FMT_RGB555BE
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), big-endian , X=unused/undefined
Definition: pixfmt.h:107
av_image_copy_plane
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:374
IMAGE_DATA_CHUNK
#define IMAGE_DATA_CHUNK
Definition: brenderpix.c:33
bytestream2_skip
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
HEADER2_CHUNK
#define HEADER2_CHUNK
Definition: brenderpix.c:32
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:116
PixHeader::format
int format
Definition: brenderpix.c:111
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:254
pix_decode_frame
static int pix_decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
Definition: brenderpix.c:133
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
PixHeader::width
int width
Definition: brenderpix.c:109
std_pal_table
static const uint32_t std_pal_table[256]
Definition: brenderpix.c:45
bytestream2_get_bytes_left
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:158
bytestream2_tell
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:192
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1403
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:375
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:116
codec_internal.h
AV_PIX_FMT_ARGB
@ AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:203
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:599
avcodec.h
AV_PIX_FMT_PAL8
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
ret
ret
Definition: filter_design.txt:187
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
ff_brender_pix_decoder
const FFCodec ff_brender_pix_decoder
Definition: brenderpix.c:287
AVCodecContext
main external API structure.
Definition: avcodec.h:389
PixHeader
Definition: brenderpix.c:108
AV_PIX_FMT_RGB565BE
@ AV_PIX_FMT_RGB565BE
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
Definition: pixfmt.h:105
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
ff_set_dimensions
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:90
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
AVPacket
This structure stores compressed data.
Definition: packet.h:351
PixHeader::height
int height
Definition: brenderpix.c:110
HEADER1_CHUNK
#define HEADER1_CHUNK
Definition: brenderpix.c:31
bytestream.h
imgutils.h
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
AV_PIX_FMT_0RGB
@ AV_PIX_FMT_0RGB
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:227
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AV_CODEC_ID_BRENDER_PIX
@ AV_CODEC_ID_BRENDER_PIX
Definition: codec_id.h:228
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
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