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