blob: 12e3bfde4deb5196fbb91fec9c3bfa6cd9ad994c
1 | /* |
2 | * Binary text demuxer |
3 | * eXtended BINary text (XBIN) demuxer |
4 | * Artworx Data Format demuxer |
5 | * iCEDraw File demuxer |
6 | * Copyright (c) 2010 Peter Ross <pross@xvid.org> |
7 | * |
8 | * This file is part of FFmpeg. |
9 | * |
10 | * FFmpeg is free software; you can redistribute it and/or |
11 | * modify it under the terms of the GNU Lesser General Public |
12 | * License as published by the Free Software Foundation; either |
13 | * version 2.1 of the License, or (at your option) any later version. |
14 | * |
15 | * FFmpeg is distributed in the hope that it will be useful, |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
18 | * Lesser General Public License for more details. |
19 | * |
20 | * You should have received a copy of the GNU Lesser General Public |
21 | * License along with FFmpeg; if not, write to the Free Software |
22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
23 | */ |
24 | |
25 | /** |
26 | * @file |
27 | * Binary text demuxer |
28 | * eXtended BINary text (XBIN) demuxer |
29 | * Artworx Data Format demuxer |
30 | * iCEDraw File demuxer |
31 | */ |
32 | |
33 | #include "libavutil/intreadwrite.h" |
34 | #include "libavutil/opt.h" |
35 | #include "libavutil/parseutils.h" |
36 | #include "avformat.h" |
37 | #include "internal.h" |
38 | #include "sauce.h" |
39 | #include "libavcodec/bintext.h" |
40 | |
41 | typedef struct { |
42 | const AVClass *class; |
43 | int chars_per_frame; /**< characters to send decoder per frame; |
44 | set by private options as characters per second, and then |
45 | converted to characters per frame at runtime */ |
46 | int width, height; /**< video size (WxH pixels) (private option) */ |
47 | AVRational framerate; /**< frames per second (private option) */ |
48 | uint64_t fsize; /**< file size less metadata buffer */ |
49 | } BinDemuxContext; |
50 | |
51 | static AVStream * init_stream(AVFormatContext *s) |
52 | { |
53 | BinDemuxContext *bin = s->priv_data; |
54 | AVStream *st = avformat_new_stream(s, NULL); |
55 | if (!st) |
56 | return NULL; |
57 | st->codecpar->codec_tag = 0; |
58 | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
59 | |
60 | if (!bin->width) { |
61 | st->codecpar->width = (80<<3); |
62 | st->codecpar->height = (25<<4); |
63 | } |
64 | |
65 | avpriv_set_pts_info(st, 60, bin->framerate.den, bin->framerate.num); |
66 | |
67 | /* simulate tty display speed */ |
68 | bin->chars_per_frame = av_clip(av_q2d(st->time_base) * bin->chars_per_frame, 1, INT_MAX); |
69 | |
70 | return st; |
71 | } |
72 | |
73 | #if CONFIG_BINTEXT_DEMUXER | CONFIG_ADF_DEMUXER | CONFIG_IDF_DEMUXER |
74 | /** |
75 | * Given filesize and width, calculate height (assume font_height of 16) |
76 | */ |
77 | static void calculate_height(AVCodecParameters *par, uint64_t fsize) |
78 | { |
79 | par->height = (fsize / ((par->width>>3)*2)) << 4; |
80 | } |
81 | #endif |
82 | |
83 | #if CONFIG_BINTEXT_DEMUXER |
84 | static const uint8_t next_magic[]={ |
85 | 0x1A, 0x1B, '[', '0', ';', '3', '0', ';', '4', '0', 'm', 'N', 'E', 'X', 'T', 0x00 |
86 | }; |
87 | |
88 | static int next_tag_read(AVFormatContext *avctx, uint64_t *fsize) |
89 | { |
90 | AVIOContext *pb = avctx->pb; |
91 | char buf[36]; |
92 | int len; |
93 | uint64_t start_pos = avio_size(pb) - 256; |
94 | |
95 | avio_seek(pb, start_pos, SEEK_SET); |
96 | if (avio_read(pb, buf, sizeof(next_magic)) != sizeof(next_magic)) |
97 | return -1; |
98 | if (memcmp(buf, next_magic, sizeof(next_magic))) |
99 | return -1; |
100 | if (avio_r8(pb) != 0x01) |
101 | return -1; |
102 | |
103 | *fsize -= 256; |
104 | |
105 | #define GET_EFI2_META(name,size) \ |
106 | len = avio_r8(pb); \ |
107 | if (len < 1 || len > size) \ |
108 | return -1; \ |
109 | if (avio_read(pb, buf, size) == size && *buf) { \ |
110 | buf[len] = 0; \ |
111 | av_dict_set(&avctx->metadata, name, buf, 0); \ |
112 | } |
113 | |
114 | GET_EFI2_META("filename", 12) |
115 | GET_EFI2_META("author", 20) |
116 | GET_EFI2_META("publisher", 20) |
117 | GET_EFI2_META("title", 35) |
118 | |
119 | return 0; |
120 | } |
121 | |
122 | static void predict_width(AVCodecParameters *par, uint64_t fsize, int got_width) |
123 | { |
124 | /** attempt to guess width */ |
125 | if (!got_width) |
126 | par->width = fsize > 4000 ? (160<<3) : (80<<3); |
127 | } |
128 | |
129 | static int bintext_read_header(AVFormatContext *s) |
130 | { |
131 | BinDemuxContext *bin = s->priv_data; |
132 | AVIOContext *pb = s->pb; |
133 | |
134 | AVStream *st = init_stream(s); |
135 | if (!st) |
136 | return AVERROR(ENOMEM); |
137 | st->codecpar->codec_id = AV_CODEC_ID_BINTEXT; |
138 | |
139 | if (ff_alloc_extradata(st->codecpar, 2)) |
140 | return AVERROR(ENOMEM); |
141 | st->codecpar->extradata[0] = 16; |
142 | st->codecpar->extradata[1] = 0; |
143 | |
144 | if (pb->seekable & AVIO_SEEKABLE_NORMAL) { |
145 | int got_width = 0; |
146 | bin->fsize = avio_size(pb); |
147 | if (ff_sauce_read(s, &bin->fsize, &got_width, 0) < 0) |
148 | next_tag_read(s, &bin->fsize); |
149 | if (!bin->width) { |
150 | predict_width(st->codecpar, bin->fsize, got_width); |
151 | calculate_height(st->codecpar, bin->fsize); |
152 | } |
153 | avio_seek(pb, 0, SEEK_SET); |
154 | } |
155 | return 0; |
156 | } |
157 | #endif /* CONFIG_BINTEXT_DEMUXER */ |
158 | |
159 | #if CONFIG_XBIN_DEMUXER |
160 | static int xbin_probe(AVProbeData *p) |
161 | { |
162 | const uint8_t *d = p->buf; |
163 | |
164 | if (AV_RL32(d) == MKTAG('X','B','I','N') && d[4] == 0x1A && |
165 | AV_RL16(d+5) > 0 && AV_RL16(d+5) <= 160 && |
166 | d[9] > 0 && d[9] <= 32) |
167 | return AVPROBE_SCORE_MAX; |
168 | return 0; |
169 | } |
170 | |
171 | static int xbin_read_header(AVFormatContext *s) |
172 | { |
173 | BinDemuxContext *bin = s->priv_data; |
174 | AVIOContext *pb = s->pb; |
175 | char fontheight, flags; |
176 | |
177 | AVStream *st = init_stream(s); |
178 | if (!st) |
179 | return AVERROR(ENOMEM); |
180 | |
181 | avio_skip(pb, 5); |
182 | st->codecpar->width = avio_rl16(pb)<<3; |
183 | st->codecpar->height = avio_rl16(pb); |
184 | fontheight = avio_r8(pb); |
185 | st->codecpar->height *= fontheight; |
186 | flags = avio_r8(pb); |
187 | |
188 | st->codecpar->extradata_size = 2; |
189 | if ((flags & BINTEXT_PALETTE)) |
190 | st->codecpar->extradata_size += 48; |
191 | if ((flags & BINTEXT_FONT)) |
192 | st->codecpar->extradata_size += fontheight * (flags & 0x10 ? 512 : 256); |
193 | st->codecpar->codec_id = flags & 4 ? AV_CODEC_ID_XBIN : AV_CODEC_ID_BINTEXT; |
194 | |
195 | if (ff_alloc_extradata(st->codecpar, st->codecpar->extradata_size)) |
196 | return AVERROR(ENOMEM); |
197 | st->codecpar->extradata[0] = fontheight; |
198 | st->codecpar->extradata[1] = flags; |
199 | if (avio_read(pb, st->codecpar->extradata + 2, st->codecpar->extradata_size - 2) < 0) |
200 | return AVERROR(EIO); |
201 | |
202 | if (pb->seekable & AVIO_SEEKABLE_NORMAL) { |
203 | bin->fsize = avio_size(pb) - 9 - st->codecpar->extradata_size; |
204 | ff_sauce_read(s, &bin->fsize, NULL, 0); |
205 | avio_seek(pb, 9 + st->codecpar->extradata_size, SEEK_SET); |
206 | } |
207 | |
208 | return 0; |
209 | } |
210 | #endif /* CONFIG_XBIN_DEMUXER */ |
211 | |
212 | #if CONFIG_ADF_DEMUXER |
213 | static int adf_read_header(AVFormatContext *s) |
214 | { |
215 | BinDemuxContext *bin = s->priv_data; |
216 | AVIOContext *pb = s->pb; |
217 | AVStream *st; |
218 | |
219 | if (avio_r8(pb) != 1) |
220 | return AVERROR_INVALIDDATA; |
221 | |
222 | st = init_stream(s); |
223 | if (!st) |
224 | return AVERROR(ENOMEM); |
225 | st->codecpar->codec_id = AV_CODEC_ID_BINTEXT; |
226 | |
227 | if (ff_alloc_extradata(st->codecpar, 2 + 48 + 4096)) |
228 | return AVERROR(ENOMEM); |
229 | st->codecpar->extradata[0] = 16; |
230 | st->codecpar->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT; |
231 | |
232 | if (avio_read(pb, st->codecpar->extradata + 2, 24) < 0) |
233 | return AVERROR(EIO); |
234 | avio_skip(pb, 144); |
235 | if (avio_read(pb, st->codecpar->extradata + 2 + 24, 24) < 0) |
236 | return AVERROR(EIO); |
237 | if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 0) |
238 | return AVERROR(EIO); |
239 | |
240 | if (pb->seekable & AVIO_SEEKABLE_NORMAL) { |
241 | int got_width = 0; |
242 | bin->fsize = avio_size(pb) - 1 - 192 - 4096; |
243 | st->codecpar->width = 80<<3; |
244 | ff_sauce_read(s, &bin->fsize, &got_width, 0); |
245 | if (!bin->width) |
246 | calculate_height(st->codecpar, bin->fsize); |
247 | avio_seek(pb, 1 + 192 + 4096, SEEK_SET); |
248 | } |
249 | return 0; |
250 | } |
251 | #endif /* CONFIG_ADF_DEMUXER */ |
252 | |
253 | #if CONFIG_IDF_DEMUXER |
254 | static const uint8_t idf_magic[] = { |
255 | 0x04, 0x31, 0x2e, 0x34, 0x00, 0x00, 0x00, 0x00, 0x4f, 0x00, 0x15, 0x00 |
256 | }; |
257 | |
258 | static int idf_probe(AVProbeData *p) |
259 | { |
260 | if (p->buf_size < sizeof(idf_magic)) |
261 | return 0; |
262 | if (!memcmp(p->buf, idf_magic, sizeof(idf_magic))) |
263 | return AVPROBE_SCORE_MAX; |
264 | return 0; |
265 | } |
266 | |
267 | static int idf_read_header(AVFormatContext *s) |
268 | { |
269 | BinDemuxContext *bin = s->priv_data; |
270 | AVIOContext *pb = s->pb; |
271 | AVStream *st; |
272 | int got_width = 0; |
273 | |
274 | if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) |
275 | return AVERROR(EIO); |
276 | |
277 | st = init_stream(s); |
278 | if (!st) |
279 | return AVERROR(ENOMEM); |
280 | st->codecpar->codec_id = AV_CODEC_ID_IDF; |
281 | |
282 | if (ff_alloc_extradata(st->codecpar, 2 + 48 + 4096)) |
283 | return AVERROR(ENOMEM); |
284 | st->codecpar->extradata[0] = 16; |
285 | st->codecpar->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT; |
286 | |
287 | avio_seek(pb, avio_size(pb) - 4096 - 48, SEEK_SET); |
288 | |
289 | if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 0) |
290 | return AVERROR(EIO); |
291 | if (avio_read(pb, st->codecpar->extradata + 2, 48) < 0) |
292 | return AVERROR(EIO); |
293 | |
294 | bin->fsize = avio_size(pb) - 12 - 4096 - 48; |
295 | ff_sauce_read(s, &bin->fsize, &got_width, 0); |
296 | if (!bin->width) |
297 | calculate_height(st->codecpar, bin->fsize); |
298 | avio_seek(pb, 12, SEEK_SET); |
299 | return 0; |
300 | } |
301 | #endif /* CONFIG_IDF_DEMUXER */ |
302 | |
303 | static int read_packet(AVFormatContext *s, |
304 | AVPacket *pkt) |
305 | { |
306 | BinDemuxContext *bin = s->priv_data; |
307 | |
308 | if (bin->fsize > 0) { |
309 | if (av_get_packet(s->pb, pkt, bin->fsize) < 0) |
310 | return AVERROR(EIO); |
311 | bin->fsize = -1; /* done */ |
312 | } else if (!bin->fsize) { |
313 | if (avio_feof(s->pb)) |
314 | return AVERROR(EIO); |
315 | if (av_get_packet(s->pb, pkt, bin->chars_per_frame) < 0) |
316 | return AVERROR(EIO); |
317 | } else { |
318 | return AVERROR(EIO); |
319 | } |
320 | |
321 | pkt->flags |= AV_PKT_FLAG_KEY; |
322 | return 0; |
323 | } |
324 | |
325 | #define OFFSET(x) offsetof(BinDemuxContext, x) |
326 | static const AVOption options[] = { |
327 | { "linespeed", "set simulated line speed (bytes per second)", OFFSET(chars_per_frame), AV_OPT_TYPE_INT, {.i64 = 6000}, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM}, |
328 | { "video_size", "set video size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM }, |
329 | { "framerate", "set framerate (frames per second)", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, |
330 | { NULL }, |
331 | }; |
332 | |
333 | #define CLASS(name) \ |
334 | (const AVClass[1]){{ \ |
335 | .class_name = name, \ |
336 | .item_name = av_default_item_name, \ |
337 | .option = options, \ |
338 | .version = LIBAVUTIL_VERSION_INT, \ |
339 | }} |
340 | |
341 | #if CONFIG_BINTEXT_DEMUXER |
342 | AVInputFormat ff_bintext_demuxer = { |
343 | .name = "bin", |
344 | .long_name = NULL_IF_CONFIG_SMALL("Binary text"), |
345 | .priv_data_size = sizeof(BinDemuxContext), |
346 | .read_header = bintext_read_header, |
347 | .read_packet = read_packet, |
348 | .extensions = "bin", |
349 | .priv_class = CLASS("Binary text demuxer"), |
350 | }; |
351 | #endif |
352 | |
353 | #if CONFIG_XBIN_DEMUXER |
354 | AVInputFormat ff_xbin_demuxer = { |
355 | .name = "xbin", |
356 | .long_name = NULL_IF_CONFIG_SMALL("eXtended BINary text (XBIN)"), |
357 | .priv_data_size = sizeof(BinDemuxContext), |
358 | .read_probe = xbin_probe, |
359 | .read_header = xbin_read_header, |
360 | .read_packet = read_packet, |
361 | .priv_class = CLASS("eXtended BINary text (XBIN) demuxer"), |
362 | }; |
363 | #endif |
364 | |
365 | #if CONFIG_ADF_DEMUXER |
366 | AVInputFormat ff_adf_demuxer = { |
367 | .name = "adf", |
368 | .long_name = NULL_IF_CONFIG_SMALL("Artworx Data Format"), |
369 | .priv_data_size = sizeof(BinDemuxContext), |
370 | .read_header = adf_read_header, |
371 | .read_packet = read_packet, |
372 | .extensions = "adf", |
373 | .priv_class = CLASS("Artworx Data Format demuxer"), |
374 | }; |
375 | #endif |
376 | |
377 | #if CONFIG_IDF_DEMUXER |
378 | AVInputFormat ff_idf_demuxer = { |
379 | .name = "idf", |
380 | .long_name = NULL_IF_CONFIG_SMALL("iCE Draw File"), |
381 | .priv_data_size = sizeof(BinDemuxContext), |
382 | .read_probe = idf_probe, |
383 | .read_header = idf_read_header, |
384 | .read_packet = read_packet, |
385 | .extensions = "idf", |
386 | .priv_class = CLASS("iCE Draw File demuxer"), |
387 | }; |
388 | #endif |
389 |