diff options
Diffstat (limited to 'ffmpeg/libavformat/tty.c')
| -rw-r--r-- | ffmpeg/libavformat/tty.c | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/ffmpeg/libavformat/tty.c b/ffmpeg/libavformat/tty.c deleted file mode 100644 index 3afb9b2..0000000 --- a/ffmpeg/libavformat/tty.c +++ /dev/null @@ -1,160 +0,0 @@ -/* - * Tele-typewriter 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 - * Tele-typewriter demuxer - */ - -#include "libavutil/intreadwrite.h" -#include "libavutil/avstring.h" -#include "libavutil/log.h" -#include "libavutil/dict.h" -#include "libavutil/opt.h" -#include "libavutil/parseutils.h" -#include "avformat.h" -#include "internal.h" -#include "sauce.h" - -typedef struct { - AVClass *class; - int chars_per_frame; - uint64_t fsize; /**< file size less metadata buffer */ - int width, height; /**< Set by a private option. */ - AVRational framerate; /**< Set by a private option. */ -} TtyDemuxContext; - -/** - * Parse EFI header - */ -static int efi_read(AVFormatContext *avctx, uint64_t start_pos) -{ - TtyDemuxContext *s = avctx->priv_data; - AVIOContext *pb = avctx->pb; - char buf[37]; - int len; - - avio_seek(pb, start_pos, SEEK_SET); - if (avio_r8(pb) != 0x1A) - return -1; - -#define GET_EFI_META(name,size) \ - len = avio_r8(pb); \ - if (len < 1 || len > size) \ - return -1; \ - if (avio_read(pb, buf, size) == size) { \ - buf[len] = 0; \ - av_dict_set(&avctx->metadata, name, buf, 0); \ - } - - GET_EFI_META("filename", 12) - GET_EFI_META("title", 36) - - s->fsize = start_pos; - return 0; -} - -static int read_header(AVFormatContext *avctx) -{ - TtyDemuxContext *s = avctx->priv_data; - int ret = 0; - AVStream *st = avformat_new_stream(avctx, NULL); - - if (!st) { - ret = AVERROR(ENOMEM); - goto fail; - } - st->codec->codec_tag = 0; - st->codec->codec_type = AVMEDIA_TYPE_VIDEO; - st->codec->codec_id = AV_CODEC_ID_ANSI; - - st->codec->width = s->width; - st->codec->height = s->height; - avpriv_set_pts_info(st, 60, s->framerate.den, s->framerate.num); - st->avg_frame_rate = s->framerate; - - /* simulate tty display speed */ - s->chars_per_frame = FFMAX(av_q2d(st->time_base)*s->chars_per_frame, 1); - - if (avctx->pb->seekable) { - s->fsize = avio_size(avctx->pb); - st->duration = (s->fsize + s->chars_per_frame - 1) / s->chars_per_frame; - - if (ff_sauce_read(avctx, &s->fsize, 0, 0) < 0) - efi_read(avctx, s->fsize - 51); - - avio_seek(avctx->pb, 0, SEEK_SET); - } - -fail: - return ret; -} - -static int read_packet(AVFormatContext *avctx, AVPacket *pkt) -{ - TtyDemuxContext *s = avctx->priv_data; - int n; - - if (url_feof(avctx->pb)) - return AVERROR_EOF; - - n = s->chars_per_frame; - if (s->fsize) { - // ignore metadata buffer - uint64_t p = avio_tell(avctx->pb); - if (p == s->fsize) - return AVERROR_EOF; - if (p + s->chars_per_frame > s->fsize) - n = s->fsize - p; - } - - pkt->size = av_get_packet(avctx->pb, pkt, n); - if (pkt->size < 0) - return pkt->size; - pkt->flags |= AV_PKT_FLAG_KEY; - return 0; -} - -#define OFFSET(x) offsetof(TtyDemuxContext, x) -#define DEC AV_OPT_FLAG_DECODING_PARAM -static const AVOption options[] = { - { "chars_per_frame", "", offsetof(TtyDemuxContext, chars_per_frame), AV_OPT_TYPE_INT, {.i64 = 6000}, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM}, - { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC }, - { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC }, - { NULL }, -}; - -static const AVClass tty_demuxer_class = { - .class_name = "TTY demuxer", - .item_name = av_default_item_name, - .option = options, - .version = LIBAVUTIL_VERSION_INT, -}; - -AVInputFormat ff_tty_demuxer = { - .name = "tty", - .long_name = NULL_IF_CONFIG_SMALL("Tele-typewriter"), - .priv_data_size = sizeof(TtyDemuxContext), - .read_header = read_header, - .read_packet = read_packet, - .extensions = "ans,art,asc,diz,ice,nfo,txt,vt", - .priv_class = &tty_demuxer_class, -}; |