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435 lines
13 KiB
435 lines
13 KiB
/* |
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* Binary text demuxer |
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* eXtended BINary text (XBIN) demuxer |
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* Artworx Data Format demuxer |
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* iCEDraw File demuxer |
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* Copyright (c) 2010 Peter Ross <pross@xvid.org> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* Binary text demuxer |
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* eXtended BINary text (XBIN) demuxer |
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* Artworx Data Format demuxer |
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* iCEDraw File demuxer |
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*/ |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/parseutils.h" |
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#include "avformat.h" |
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#include "internal.h" |
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#include "sauce.h" |
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#include "libavcodec/bintext.h" |
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typedef struct { |
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const AVClass *class; |
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int chars_per_frame; /**< characters to send decoder per frame; |
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set by private options as characters per second, and then |
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converted to characters per frame at runtime */ |
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int width, height; /**< video size (WxH pixels) (private option) */ |
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AVRational framerate; /**< frames per second (private option) */ |
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uint64_t fsize; /**< file size less metadata buffer */ |
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} BinDemuxContext; |
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static AVStream * init_stream(AVFormatContext *s) |
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{ |
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BinDemuxContext *bin = s->priv_data; |
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AVStream *st = avformat_new_stream(s, NULL); |
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if (!st) |
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return NULL; |
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st->codecpar->codec_tag = 0; |
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
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if (!bin->width) { |
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st->codecpar->width = (80<<3); |
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st->codecpar->height = (25<<4); |
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} |
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avpriv_set_pts_info(st, 60, bin->framerate.den, bin->framerate.num); |
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/* simulate tty display speed */ |
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bin->chars_per_frame = av_clip(av_q2d(st->time_base) * bin->chars_per_frame, 1, INT_MAX); |
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return st; |
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} |
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#if CONFIG_BINTEXT_DEMUXER | CONFIG_ADF_DEMUXER | CONFIG_IDF_DEMUXER |
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/** |
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* Given filesize and width, calculate height (assume font_height of 16) |
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*/ |
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static void calculate_height(AVCodecParameters *par, uint64_t fsize) |
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{ |
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par->height = (fsize / ((par->width>>3)*2)) << 4; |
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} |
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#endif |
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#if CONFIG_BINTEXT_DEMUXER |
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static const uint8_t next_magic[]={ |
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0x1A, 0x1B, '[', '0', ';', '3', '0', ';', '4', '0', 'm', 'N', 'E', 'X', 'T', 0x00 |
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}; |
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static int next_tag_read(AVFormatContext *avctx, uint64_t *fsize) |
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{ |
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AVIOContext *pb = avctx->pb; |
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char buf[36]; |
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int len; |
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uint64_t start_pos = avio_size(pb) - 256; |
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avio_seek(pb, start_pos, SEEK_SET); |
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if (avio_read(pb, buf, sizeof(next_magic)) != sizeof(next_magic)) |
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return -1; |
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if (memcmp(buf, next_magic, sizeof(next_magic))) |
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return -1; |
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if (avio_r8(pb) != 0x01) |
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return -1; |
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*fsize -= 256; |
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#define GET_EFI2_META(name,size) \ |
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len = avio_r8(pb); \ |
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if (len < 1 || len > size) \ |
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return -1; \ |
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if (avio_read(pb, buf, size) == size && *buf) { \ |
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buf[len] = 0; \ |
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av_dict_set(&avctx->metadata, name, buf, 0); \ |
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} |
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GET_EFI2_META("filename", 12) |
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GET_EFI2_META("author", 20) |
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GET_EFI2_META("publisher", 20) |
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GET_EFI2_META("title", 35) |
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return 0; |
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} |
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static void predict_width(AVCodecParameters *par, uint64_t fsize, int got_width) |
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{ |
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/** attempt to guess width */ |
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if (!got_width) |
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par->width = fsize > 4000 ? (160<<3) : (80<<3); |
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} |
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static int bin_probe(AVProbeData *p) |
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{ |
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const uint8_t *d = p->buf; |
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int magic = 0, sauce = 0; |
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int invisible = 0; |
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int i; |
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if (p->buf_size > 256) |
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magic = !memcmp(d + p->buf_size - 256, next_magic, sizeof(next_magic)); |
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if (p->buf_size > 128) |
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sauce = !memcmp(d + p->buf_size - 128, "SAUCE00", 7); |
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if (magic) |
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return AVPROBE_SCORE_EXTENSION + 1; |
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if (av_match_ext(p->filename, "bin")) { |
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AVCodecParameters par; |
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int got_width = 0; |
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par.width = par.height = 0; |
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if (sauce) |
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return AVPROBE_SCORE_EXTENSION + 1; |
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predict_width(&par, p->buf_size, got_width); |
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if (par.width <= 0) |
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return 0; |
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calculate_height(&par, p->buf_size); |
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if (par.height <= 0) |
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return 0; |
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for (i = 0; i < p->buf_size - 256; i+=2) { |
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if ((d[i+1] & 15) == (d[i+1] >> 4) && d[i] && d[i] != 0xFF && d[i] != ' ') { |
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invisible ++; |
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} |
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} |
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if (par.width * par.height * 2 / (8*16) == p->buf_size) |
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return AVPROBE_SCORE_MAX / 2; |
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return 1; |
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} |
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if (sauce) |
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return 1; |
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return 0; |
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} |
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static int bintext_read_header(AVFormatContext *s) |
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{ |
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BinDemuxContext *bin = s->priv_data; |
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AVIOContext *pb = s->pb; |
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AVStream *st = init_stream(s); |
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if (!st) |
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return AVERROR(ENOMEM); |
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st->codecpar->codec_id = AV_CODEC_ID_BINTEXT; |
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if (ff_alloc_extradata(st->codecpar, 2)) |
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return AVERROR(ENOMEM); |
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st->codecpar->extradata[0] = 16; |
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st->codecpar->extradata[1] = 0; |
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if (pb->seekable & AVIO_SEEKABLE_NORMAL) { |
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int got_width = 0; |
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bin->fsize = avio_size(pb); |
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if (ff_sauce_read(s, &bin->fsize, &got_width, 0) < 0) |
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next_tag_read(s, &bin->fsize); |
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if (!bin->width) { |
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predict_width(st->codecpar, bin->fsize, got_width); |
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calculate_height(st->codecpar, bin->fsize); |
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} |
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avio_seek(pb, 0, SEEK_SET); |
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} |
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return 0; |
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} |
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#endif /* CONFIG_BINTEXT_DEMUXER */ |
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#if CONFIG_XBIN_DEMUXER |
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static int xbin_probe(AVProbeData *p) |
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{ |
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const uint8_t *d = p->buf; |
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if (AV_RL32(d) == MKTAG('X','B','I','N') && d[4] == 0x1A && |
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AV_RL16(d+5) > 0 && AV_RL16(d+5) <= 160 && |
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d[9] > 0 && d[9] <= 32) |
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return AVPROBE_SCORE_MAX; |
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return 0; |
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} |
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static int xbin_read_header(AVFormatContext *s) |
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{ |
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BinDemuxContext *bin = s->priv_data; |
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AVIOContext *pb = s->pb; |
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char fontheight, flags; |
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AVStream *st = init_stream(s); |
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if (!st) |
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return AVERROR(ENOMEM); |
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avio_skip(pb, 5); |
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st->codecpar->width = avio_rl16(pb)<<3; |
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st->codecpar->height = avio_rl16(pb); |
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fontheight = avio_r8(pb); |
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st->codecpar->height *= fontheight; |
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flags = avio_r8(pb); |
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st->codecpar->extradata_size = 2; |
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if ((flags & BINTEXT_PALETTE)) |
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st->codecpar->extradata_size += 48; |
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if ((flags & BINTEXT_FONT)) |
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st->codecpar->extradata_size += fontheight * (flags & 0x10 ? 512 : 256); |
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st->codecpar->codec_id = flags & 4 ? AV_CODEC_ID_XBIN : AV_CODEC_ID_BINTEXT; |
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if (ff_alloc_extradata(st->codecpar, st->codecpar->extradata_size)) |
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return AVERROR(ENOMEM); |
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st->codecpar->extradata[0] = fontheight; |
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st->codecpar->extradata[1] = flags; |
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if (avio_read(pb, st->codecpar->extradata + 2, st->codecpar->extradata_size - 2) < 0) |
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return AVERROR(EIO); |
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if (pb->seekable & AVIO_SEEKABLE_NORMAL) { |
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bin->fsize = avio_size(pb) - 9 - st->codecpar->extradata_size; |
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ff_sauce_read(s, &bin->fsize, NULL, 0); |
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avio_seek(pb, 9 + st->codecpar->extradata_size, SEEK_SET); |
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} |
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return 0; |
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} |
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#endif /* CONFIG_XBIN_DEMUXER */ |
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#if CONFIG_ADF_DEMUXER |
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static int adf_read_header(AVFormatContext *s) |
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{ |
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BinDemuxContext *bin = s->priv_data; |
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AVIOContext *pb = s->pb; |
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AVStream *st; |
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if (avio_r8(pb) != 1) |
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return AVERROR_INVALIDDATA; |
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st = init_stream(s); |
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if (!st) |
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return AVERROR(ENOMEM); |
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st->codecpar->codec_id = AV_CODEC_ID_BINTEXT; |
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if (ff_alloc_extradata(st->codecpar, 2 + 48 + 4096)) |
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return AVERROR(ENOMEM); |
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st->codecpar->extradata[0] = 16; |
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st->codecpar->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT; |
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if (avio_read(pb, st->codecpar->extradata + 2, 24) < 0) |
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return AVERROR(EIO); |
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avio_skip(pb, 144); |
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if (avio_read(pb, st->codecpar->extradata + 2 + 24, 24) < 0) |
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return AVERROR(EIO); |
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if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 0) |
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return AVERROR(EIO); |
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if (pb->seekable & AVIO_SEEKABLE_NORMAL) { |
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int got_width = 0; |
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bin->fsize = avio_size(pb) - 1 - 192 - 4096; |
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st->codecpar->width = 80<<3; |
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ff_sauce_read(s, &bin->fsize, &got_width, 0); |
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if (!bin->width) |
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calculate_height(st->codecpar, bin->fsize); |
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avio_seek(pb, 1 + 192 + 4096, SEEK_SET); |
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} |
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return 0; |
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} |
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#endif /* CONFIG_ADF_DEMUXER */ |
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#if CONFIG_IDF_DEMUXER |
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static const uint8_t idf_magic[] = { |
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0x04, 0x31, 0x2e, 0x34, 0x00, 0x00, 0x00, 0x00, 0x4f, 0x00, 0x15, 0x00 |
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}; |
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static int idf_probe(AVProbeData *p) |
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{ |
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if (p->buf_size < sizeof(idf_magic)) |
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return 0; |
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if (!memcmp(p->buf, idf_magic, sizeof(idf_magic))) |
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return AVPROBE_SCORE_MAX; |
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return 0; |
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} |
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static int idf_read_header(AVFormatContext *s) |
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{ |
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BinDemuxContext *bin = s->priv_data; |
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AVIOContext *pb = s->pb; |
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AVStream *st; |
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int got_width = 0; |
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if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) |
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return AVERROR(EIO); |
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st = init_stream(s); |
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if (!st) |
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return AVERROR(ENOMEM); |
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st->codecpar->codec_id = AV_CODEC_ID_IDF; |
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if (ff_alloc_extradata(st->codecpar, 2 + 48 + 4096)) |
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return AVERROR(ENOMEM); |
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st->codecpar->extradata[0] = 16; |
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st->codecpar->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT; |
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avio_seek(pb, avio_size(pb) - 4096 - 48, SEEK_SET); |
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if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 0) |
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return AVERROR(EIO); |
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if (avio_read(pb, st->codecpar->extradata + 2, 48) < 0) |
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return AVERROR(EIO); |
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bin->fsize = avio_size(pb) - 12 - 4096 - 48; |
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ff_sauce_read(s, &bin->fsize, &got_width, 0); |
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if (!bin->width) |
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calculate_height(st->codecpar, bin->fsize); |
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avio_seek(pb, 12, SEEK_SET); |
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return 0; |
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} |
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#endif /* CONFIG_IDF_DEMUXER */ |
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static int read_packet(AVFormatContext *s, |
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AVPacket *pkt) |
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{ |
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BinDemuxContext *bin = s->priv_data; |
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if (bin->fsize > 0) { |
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if (av_get_packet(s->pb, pkt, bin->fsize) < 0) |
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return AVERROR(EIO); |
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bin->fsize = -1; /* done */ |
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} else if (!bin->fsize) { |
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if (avio_feof(s->pb)) |
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return AVERROR(EIO); |
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if (av_get_packet(s->pb, pkt, bin->chars_per_frame) < 0) |
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return AVERROR(EIO); |
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} else { |
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return AVERROR(EIO); |
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} |
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pkt->flags |= AV_PKT_FLAG_KEY; |
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return 0; |
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} |
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#define OFFSET(x) offsetof(BinDemuxContext, x) |
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static const AVOption options[] = { |
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{ "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}, |
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{ "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 }, |
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{ "framerate", "set framerate (frames per second)", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, |
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{ NULL }, |
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}; |
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#define CLASS(name) \ |
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(const AVClass[1]){{ \ |
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.class_name = name, \ |
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.item_name = av_default_item_name, \ |
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.option = options, \ |
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.version = LIBAVUTIL_VERSION_INT, \ |
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}} |
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#if CONFIG_BINTEXT_DEMUXER |
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AVInputFormat ff_bintext_demuxer = { |
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.name = "bin", |
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.long_name = NULL_IF_CONFIG_SMALL("Binary text"), |
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.priv_data_size = sizeof(BinDemuxContext), |
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.read_probe = bin_probe, |
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.read_header = bintext_read_header, |
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.read_packet = read_packet, |
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.priv_class = CLASS("Binary text demuxer"), |
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}; |
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#endif |
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#if CONFIG_XBIN_DEMUXER |
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AVInputFormat ff_xbin_demuxer = { |
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.name = "xbin", |
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.long_name = NULL_IF_CONFIG_SMALL("eXtended BINary text (XBIN)"), |
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.priv_data_size = sizeof(BinDemuxContext), |
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.read_probe = xbin_probe, |
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.read_header = xbin_read_header, |
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.read_packet = read_packet, |
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.priv_class = CLASS("eXtended BINary text (XBIN) demuxer"), |
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}; |
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#endif |
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#if CONFIG_ADF_DEMUXER |
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AVInputFormat ff_adf_demuxer = { |
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.name = "adf", |
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.long_name = NULL_IF_CONFIG_SMALL("Artworx Data Format"), |
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.priv_data_size = sizeof(BinDemuxContext), |
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.read_header = adf_read_header, |
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.read_packet = read_packet, |
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.extensions = "adf", |
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.priv_class = CLASS("Artworx Data Format demuxer"), |
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}; |
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#endif |
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#if CONFIG_IDF_DEMUXER |
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AVInputFormat ff_idf_demuxer = { |
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.name = "idf", |
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.long_name = NULL_IF_CONFIG_SMALL("iCE Draw File"), |
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.priv_data_size = sizeof(BinDemuxContext), |
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.read_probe = idf_probe, |
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.read_header = idf_read_header, |
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.read_packet = read_packet, |
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.extensions = "idf", |
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.priv_class = CLASS("iCE Draw File demuxer"), |
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}; |
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#endif
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