3 * eXtended BINary text (XBIN) demuxer
4 * Artworx Data Format demuxer
6 * Copyright (c) 2010 Peter Ross <pross@xvid.org>
8 * This file is part of FFmpeg.
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.
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.
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
28 * eXtended BINary text (XBIN) demuxer
29 * Artworx Data Format demuxer
30 * iCEDraw File demuxer
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/parseutils.h"
39 #include "libavcodec/bintext.h"
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 */
51 static AVStream * init_stream(AVFormatContext *s)
53 BinDemuxContext *bin = s->priv_data;
54 AVStream *st = avformat_new_stream(s, NULL);
57 st->codecpar->codec_tag = 0;
58 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
61 st->codecpar->width = (80<<3);
62 st->codecpar->height = (25<<4);
65 avpriv_set_pts_info(st, 60, bin->framerate.den, bin->framerate.num);
67 /* simulate tty display speed */
68 bin->chars_per_frame = av_clip(av_q2d(st->time_base) * bin->chars_per_frame, 1, INT_MAX);
73 #if CONFIG_BINTEXT_DEMUXER | CONFIG_ADF_DEMUXER | CONFIG_IDF_DEMUXER
75 * Given filesize and width, calculate height (assume font_height of 16)
77 static void calculate_height(AVCodecParameters *par, uint64_t fsize)
79 par->height = (fsize / ((par->width>>3)*2)) << 4;
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
88 static int next_tag_read(AVFormatContext *avctx, uint64_t *fsize)
90 AVIOContext *pb = avctx->pb;
93 uint64_t start_pos = avio_size(pb) - 256;
95 avio_seek(pb, start_pos, SEEK_SET);
96 if (avio_read(pb, buf, sizeof(next_magic)) != sizeof(next_magic))
98 if (memcmp(buf, next_magic, sizeof(next_magic)))
100 if (avio_r8(pb) != 0x01)
105 #define GET_EFI2_META(name,size) \
107 if (len < 1 || len > size) \
109 if (avio_read(pb, buf, size) == size && *buf) { \
111 av_dict_set(&avctx->metadata, name, buf, 0); \
114 GET_EFI2_META("filename", 12)
115 GET_EFI2_META("author", 20)
116 GET_EFI2_META("publisher", 20)
117 GET_EFI2_META("title", 35)
122 static void predict_width(AVCodecParameters *par, uint64_t fsize, int got_width)
124 /** attempt to guess width */
126 par->width = fsize > 4000 ? (160<<3) : (80<<3);
129 static int bin_probe(AVProbeData *p)
131 const uint8_t *d = p->buf;
132 int magic = 0, sauce = 0;
136 if (p->buf_size > 256)
137 magic = !memcmp(d + p->buf_size - 256, next_magic, sizeof(next_magic));
138 if (p->buf_size > 128)
139 sauce = !memcmp(d + p->buf_size - 128, "SAUCE00", 7);
142 return AVPROBE_SCORE_EXTENSION + 1;
144 if (av_match_ext(p->filename, "bin")) {
145 AVCodecParameters par;
147 par.width = par.height = 0;
149 return AVPROBE_SCORE_EXTENSION + 1;
151 predict_width(&par, p->buf_size, got_width);
154 calculate_height(&par, p->buf_size);
158 for (i = 0; i < p->buf_size - 256; i+=2) {
159 if ((d[i+1] & 15) == (d[i+1] >> 4) && d[i] && d[i] != 0xFF && d[i] != ' ') {
164 if (par.width * par.height * 2 / (8*16) == p->buf_size)
165 return AVPROBE_SCORE_MAX / 2;
176 static int bintext_read_header(AVFormatContext *s)
178 BinDemuxContext *bin = s->priv_data;
179 AVIOContext *pb = s->pb;
181 AVStream *st = init_stream(s);
183 return AVERROR(ENOMEM);
184 st->codecpar->codec_id = AV_CODEC_ID_BINTEXT;
186 if (ff_alloc_extradata(st->codecpar, 2))
187 return AVERROR(ENOMEM);
188 st->codecpar->extradata[0] = 16;
189 st->codecpar->extradata[1] = 0;
191 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
193 bin->fsize = avio_size(pb);
194 if (ff_sauce_read(s, &bin->fsize, &got_width, 0) < 0)
195 next_tag_read(s, &bin->fsize);
197 predict_width(st->codecpar, bin->fsize, got_width);
198 calculate_height(st->codecpar, bin->fsize);
200 avio_seek(pb, 0, SEEK_SET);
204 #endif /* CONFIG_BINTEXT_DEMUXER */
206 #if CONFIG_XBIN_DEMUXER
207 static int xbin_probe(AVProbeData *p)
209 const uint8_t *d = p->buf;
211 if (AV_RL32(d) == MKTAG('X','B','I','N') && d[4] == 0x1A &&
212 AV_RL16(d+5) > 0 && AV_RL16(d+5) <= 160 &&
213 d[9] > 0 && d[9] <= 32)
214 return AVPROBE_SCORE_MAX;
218 static int xbin_read_header(AVFormatContext *s)
220 BinDemuxContext *bin = s->priv_data;
221 AVIOContext *pb = s->pb;
222 char fontheight, flags;
224 AVStream *st = init_stream(s);
226 return AVERROR(ENOMEM);
229 st->codecpar->width = avio_rl16(pb)<<3;
230 st->codecpar->height = avio_rl16(pb);
231 fontheight = avio_r8(pb);
232 st->codecpar->height *= fontheight;
235 st->codecpar->extradata_size = 2;
236 if ((flags & BINTEXT_PALETTE))
237 st->codecpar->extradata_size += 48;
238 if ((flags & BINTEXT_FONT))
239 st->codecpar->extradata_size += fontheight * (flags & 0x10 ? 512 : 256);
240 st->codecpar->codec_id = flags & 4 ? AV_CODEC_ID_XBIN : AV_CODEC_ID_BINTEXT;
242 if (ff_alloc_extradata(st->codecpar, st->codecpar->extradata_size))
243 return AVERROR(ENOMEM);
244 st->codecpar->extradata[0] = fontheight;
245 st->codecpar->extradata[1] = flags;
246 if (avio_read(pb, st->codecpar->extradata + 2, st->codecpar->extradata_size - 2) < 0)
249 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
250 bin->fsize = avio_size(pb) - 9 - st->codecpar->extradata_size;
251 ff_sauce_read(s, &bin->fsize, NULL, 0);
252 avio_seek(pb, 9 + st->codecpar->extradata_size, SEEK_SET);
257 #endif /* CONFIG_XBIN_DEMUXER */
259 #if CONFIG_ADF_DEMUXER
260 static int adf_read_header(AVFormatContext *s)
262 BinDemuxContext *bin = s->priv_data;
263 AVIOContext *pb = s->pb;
266 if (avio_r8(pb) != 1)
267 return AVERROR_INVALIDDATA;
271 return AVERROR(ENOMEM);
272 st->codecpar->codec_id = AV_CODEC_ID_BINTEXT;
274 if (ff_alloc_extradata(st->codecpar, 2 + 48 + 4096))
275 return AVERROR(ENOMEM);
276 st->codecpar->extradata[0] = 16;
277 st->codecpar->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT;
279 if (avio_read(pb, st->codecpar->extradata + 2, 24) < 0)
282 if (avio_read(pb, st->codecpar->extradata + 2 + 24, 24) < 0)
284 if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 0)
287 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
289 bin->fsize = avio_size(pb) - 1 - 192 - 4096;
290 st->codecpar->width = 80<<3;
291 ff_sauce_read(s, &bin->fsize, &got_width, 0);
293 calculate_height(st->codecpar, bin->fsize);
294 avio_seek(pb, 1 + 192 + 4096, SEEK_SET);
298 #endif /* CONFIG_ADF_DEMUXER */
300 #if CONFIG_IDF_DEMUXER
301 static const uint8_t idf_magic[] = {
302 0x04, 0x31, 0x2e, 0x34, 0x00, 0x00, 0x00, 0x00, 0x4f, 0x00, 0x15, 0x00
305 static int idf_probe(AVProbeData *p)
307 if (p->buf_size < sizeof(idf_magic))
309 if (!memcmp(p->buf, idf_magic, sizeof(idf_magic)))
310 return AVPROBE_SCORE_MAX;
314 static int idf_read_header(AVFormatContext *s)
316 BinDemuxContext *bin = s->priv_data;
317 AVIOContext *pb = s->pb;
321 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
326 return AVERROR(ENOMEM);
327 st->codecpar->codec_id = AV_CODEC_ID_IDF;
329 if (ff_alloc_extradata(st->codecpar, 2 + 48 + 4096))
330 return AVERROR(ENOMEM);
331 st->codecpar->extradata[0] = 16;
332 st->codecpar->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT;
334 avio_seek(pb, avio_size(pb) - 4096 - 48, SEEK_SET);
336 if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 0)
338 if (avio_read(pb, st->codecpar->extradata + 2, 48) < 0)
341 bin->fsize = avio_size(pb) - 12 - 4096 - 48;
342 ff_sauce_read(s, &bin->fsize, &got_width, 0);
344 calculate_height(st->codecpar, bin->fsize);
345 avio_seek(pb, 12, SEEK_SET);
348 #endif /* CONFIG_IDF_DEMUXER */
350 static int read_packet(AVFormatContext *s,
353 BinDemuxContext *bin = s->priv_data;
355 if (bin->fsize > 0) {
356 if (av_get_packet(s->pb, pkt, bin->fsize) < 0)
358 bin->fsize = -1; /* done */
359 } else if (!bin->fsize) {
360 if (avio_feof(s->pb))
362 if (av_get_packet(s->pb, pkt, bin->chars_per_frame) < 0)
368 pkt->flags |= AV_PKT_FLAG_KEY;
372 #define OFFSET(x) offsetof(BinDemuxContext, x)
373 static const AVOption options[] = {
374 { "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},
375 { "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 },
376 { "framerate", "set framerate (frames per second)", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
380 #define CLASS(name) \
381 (const AVClass[1]){{ \
382 .class_name = name, \
383 .item_name = av_default_item_name, \
385 .version = LIBAVUTIL_VERSION_INT, \
388 #if CONFIG_BINTEXT_DEMUXER
389 AVInputFormat ff_bintext_demuxer = {
391 .long_name = NULL_IF_CONFIG_SMALL("Binary text"),
392 .priv_data_size = sizeof(BinDemuxContext),
393 .read_probe = bin_probe,
394 .read_header = bintext_read_header,
395 .read_packet = read_packet,
396 .priv_class = CLASS("Binary text demuxer"),
400 #if CONFIG_XBIN_DEMUXER
401 AVInputFormat ff_xbin_demuxer = {
403 .long_name = NULL_IF_CONFIG_SMALL("eXtended BINary text (XBIN)"),
404 .priv_data_size = sizeof(BinDemuxContext),
405 .read_probe = xbin_probe,
406 .read_header = xbin_read_header,
407 .read_packet = read_packet,
408 .priv_class = CLASS("eXtended BINary text (XBIN) demuxer"),
412 #if CONFIG_ADF_DEMUXER
413 AVInputFormat ff_adf_demuxer = {
415 .long_name = NULL_IF_CONFIG_SMALL("Artworx Data Format"),
416 .priv_data_size = sizeof(BinDemuxContext),
417 .read_header = adf_read_header,
418 .read_packet = read_packet,
420 .priv_class = CLASS("Artworx Data Format demuxer"),
424 #if CONFIG_IDF_DEMUXER
425 AVInputFormat ff_idf_demuxer = {
427 .long_name = NULL_IF_CONFIG_SMALL("iCE Draw File"),
428 .priv_data_size = sizeof(BinDemuxContext),
429 .read_probe = idf_probe,
430 .read_header = idf_read_header,
431 .read_packet = read_packet,
433 .priv_class = CLASS("iCE Draw File demuxer"),