* Tele-typewriter demuxer
* Copyright (c) 2010 Peter Ross <pross@xvid.org>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#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"
-#define LINE_RATE 6000 /* characters per second */
-
-typedef struct {
+typedef struct TtyDemuxContext {
+ AVClass *class;
int chars_per_frame;
uint64_t fsize; /**< file size less metadata buffer */
+ char *video_size;/**< A string describing video size, set by a private option. */
+ char *framerate; /**< Set by a private option. */
} TtyDemuxContext;
/**
char buf[37];
int len;
- url_fseek(pb, start_pos, SEEK_SET);
+ avio_seek(pb, start_pos, SEEK_SET);
if (avio_r8(pb) != 0x1A)
return -1;
return -1; \
if (avio_read(pb, buf, size) == size) { \
buf[len] = 0; \
- av_metadata_set2(&avctx->metadata, name, buf, 0); \
+ av_dict_set(&avctx->metadata, name, buf, 0); \
}
GET_EFI_META("filename", 12)
return 0;
}
-static int read_header(AVFormatContext *avctx,
- AVFormatParameters *ap)
+static int read_header(AVFormatContext *avctx)
{
TtyDemuxContext *s = avctx->priv_data;
- AVStream *st = av_new_stream(avctx, 0);
- if (!st)
- return AVERROR(ENOMEM);
- st->codec->codec_tag = 0;
- st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_id = CODEC_ID_ANSI;
- if (ap->width) st->codec->width = ap->width;
- if (ap->height) st->codec->height = ap->height;
-
- if (!ap->time_base.num) {
- av_set_pts_info(st, 60, 1, 25);
- } else {
- av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
+ int width = 0, height = 0, ret = 0;
+ AVStream *st = avformat_new_stream(avctx, NULL);
+ AVRational framerate;
+
+ if (!st) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ st->codecpar->codec_tag = 0;
+ st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codecpar->codec_id = AV_CODEC_ID_ANSI;
+
+ if (s->video_size && (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
+ av_log (avctx, AV_LOG_ERROR, "Couldn't parse video size.\n");
+ goto fail;
+ }
+ if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s->framerate);
+ goto fail;
}
+ st->codecpar->width = width;
+ st->codecpar->height = height;
+ avpriv_set_pts_info(st, 60, framerate.den, framerate.num);
+ st->avg_frame_rate = framerate;
/* simulate tty display speed */
- s->chars_per_frame = FFMAX(av_q2d(st->time_base) * (ap->sample_rate ? ap->sample_rate : LINE_RATE), 1);
+ s->chars_per_frame = FFMAX(av_q2d(st->time_base)*s->chars_per_frame, 1);
- if (!url_is_streamed(avctx->pb)) {
- s->fsize = url_fsize(avctx->pb);
+ 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);
- url_fseek(avctx->pb, 0, SEEK_SET);
+ avio_seek(avctx->pb, 0, SEEK_SET);
}
- return 0;
+fail:
+ return ret;
}
static int read_packet(AVFormatContext *avctx, AVPacket *pkt)
TtyDemuxContext *s = avctx->priv_data;
int n;
- if (url_feof(avctx->pb))
+ if (avctx->pb->eof_reached)
return AVERROR_EOF;
n = s->chars_per_frame;
if (s->fsize) {
// ignore metadata buffer
- uint64_t p = url_ftell(avctx->pb);
+ uint64_t p = avio_tell(avctx->pb);
if (p + s->chars_per_frame > s->fsize)
n = s->fsize - p;
}
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(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+ { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.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"),
.read_header = read_header,
.read_packet = read_packet,
.extensions = "ans,art,asc,diz,ice,nfo,txt,vt",
+ .priv_class = &tty_demuxer_class,
};
projects / ffmpeg / blobdiff