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 bintext_read_header(AVFormatContext *s)
131 BinDemuxContext *bin = s->priv_data;
132 AVIOContext *pb = s->pb;
134 AVStream *st = init_stream(s);
136 return AVERROR(ENOMEM);
137 st->codecpar->codec_id = AV_CODEC_ID_BINTEXT;
139 if (ff_alloc_extradata(st->codecpar, 2))
140 return AVERROR(ENOMEM);
141 st->codecpar->extradata[0] = 16;
142 st->codecpar->extradata[1] = 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);
150 predict_width(st->codecpar, bin->fsize, got_width);
151 calculate_height(st->codecpar, bin->fsize);
153 avio_seek(pb, 0, SEEK_SET);
157 #endif /* CONFIG_BINTEXT_DEMUXER */
159 #if CONFIG_XBIN_DEMUXER
160 static int xbin_probe(AVProbeData *p)
162 const uint8_t *d = p->buf;
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;
171 static int xbin_read_header(AVFormatContext *s)
173 BinDemuxContext *bin = s->priv_data;
174 AVIOContext *pb = s->pb;
175 char fontheight, flags;
177 AVStream *st = init_stream(s);
179 return AVERROR(ENOMEM);
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;
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;
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)
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);
210 #endif /* CONFIG_XBIN_DEMUXER */
212 #if CONFIG_ADF_DEMUXER
213 static int adf_read_header(AVFormatContext *s)
215 BinDemuxContext *bin = s->priv_data;
216 AVIOContext *pb = s->pb;
219 if (avio_r8(pb) != 1)
220 return AVERROR_INVALIDDATA;
224 return AVERROR(ENOMEM);
225 st->codecpar->codec_id = AV_CODEC_ID_BINTEXT;
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;
232 if (avio_read(pb, st->codecpar->extradata + 2, 24) < 0)
235 if (avio_read(pb, st->codecpar->extradata + 2 + 24, 24) < 0)
237 if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 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);
246 calculate_height(st->codecpar, bin->fsize);
247 avio_seek(pb, 1 + 192 + 4096, SEEK_SET);
251 #endif /* CONFIG_ADF_DEMUXER */
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
258 static int idf_probe(AVProbeData *p)
260 if (p->buf_size < sizeof(idf_magic))
262 if (!memcmp(p->buf, idf_magic, sizeof(idf_magic)))
263 return AVPROBE_SCORE_MAX;
267 static int idf_read_header(AVFormatContext *s)
269 BinDemuxContext *bin = s->priv_data;
270 AVIOContext *pb = s->pb;
279 return AVERROR(ENOMEM);
280 st->codecpar->codec_id = AV_CODEC_ID_IDF;
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;
287 avio_seek(pb, avio_size(pb) - 4096 - 48, SEEK_SET);
289 if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 0)
291 if (avio_read(pb, st->codecpar->extradata + 2, 48) < 0)
294 bin->fsize = avio_size(pb) - 12 - 4096 - 48;
295 ff_sauce_read(s, &bin->fsize, &got_width, 0);
297 calculate_height(st->codecpar, bin->fsize);
298 avio_seek(pb, 12, SEEK_SET);
301 #endif /* CONFIG_IDF_DEMUXER */
303 static int read_packet(AVFormatContext *s,
306 BinDemuxContext *bin = s->priv_data;
308 if (bin->fsize > 0) {
309 if (av_get_packet(s->pb, pkt, bin->fsize) < 0)
311 bin->fsize = -1; /* done */
312 } else if (!bin->fsize) {
313 if (avio_feof(s->pb))
315 if (av_get_packet(s->pb, pkt, bin->chars_per_frame) < 0)
321 pkt->flags |= AV_PKT_FLAG_KEY;
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, 0, AV_OPT_FLAG_DECODING_PARAM },
333 #define CLASS(name) \
334 (const AVClass[1]){{ \
335 .class_name = name, \
336 .item_name = av_default_item_name, \
338 .version = LIBAVUTIL_VERSION_INT, \
341 #if CONFIG_BINTEXT_DEMUXER
342 AVInputFormat ff_bintext_demuxer = {
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,
349 .priv_class = CLASS("Binary text demuxer"),
353 #if CONFIG_XBIN_DEMUXER
354 AVInputFormat ff_xbin_demuxer = {
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"),
365 #if CONFIG_ADF_DEMUXER
366 AVInputFormat ff_adf_demuxer = {
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,
373 .priv_class = CLASS("Artworx Data Format demuxer"),
377 #if CONFIG_IDF_DEMUXER
378 AVInputFormat ff_idf_demuxer = {
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,
386 .priv_class = CLASS("iCE Draw File demuxer"),