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/*
* 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" |
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#include "libavutil/opt.h"
#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"
#include "libavcodec/bintext.h"
typedef struct { |
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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 */
char *video_size; /**< video size (WxH pixels) (private option) */
char *framerate; /**< frames per second (private option) */ |
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uint64_t fsize; /**< file size less metadata buffer */
} BinDemuxContext;
|
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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->video_size) {
if (av_parse_video_size(&st->codec->width, &st->codec->height, bin->video_size) < 0) {
av_log(s, AV_LOG_ERROR, "Could not parse video size: '%s'\n", bin->video_size);
return NULL;
}
} else {
st->codec->width = (80<<3);
st->codec->height = (25<<4);
}
if (bin->framerate) {
AVRational framerate;
if (av_parse_video_rate(&framerate, bin->framerate) < 0) {
av_log(s, AV_LOG_ERROR, "Could not parse framerate: '%s'\n", bin->framerate);
return NULL;
}
avpriv_set_pts_info(st, 60, framerate.den, framerate.num);
} else {
avpriv_set_pts_info(st, 60, 1, 25);
}
/* simulate tty display speed */
bin->chars_per_frame = FFMAX(av_q2d(st->time_base) * bin->chars_per_frame, 1);
return st;
}
|
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#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)
{ |
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AVIOContext *pb = avctx->pb; |
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char buf[36];
int len; |
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uint64_t start_pos = avio_size(pb) - 256; |
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|
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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;
if (memcmp(buf, next_magic, sizeof(next_magic)))
return -1; |
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if (avio_r8(pb) != 0x01) |
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return -1;
*fsize -= 256;
#define GET_EFI2_META(name,size) \ |
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len = avio_r8(pb); \ |
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if (len < 1 || len > size) \
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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}
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);
}
|
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static int bintext_read_header(AVFormatContext *s) |
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{
BinDemuxContext *bin = s->priv_data; |
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AVIOContext *pb = s->pb; |
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|
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AVStream *st = init_stream(s); |
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if (!st)
return AVERROR(ENOMEM); |
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st->codec->codec_id = AV_CODEC_ID_BINTEXT; |
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st->codec->extradata_size = 2; |
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st->codec->extradata = av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
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if (!st->codec->extradata)
return AVERROR(ENOMEM);
st->codec->extradata[0] = 16;
st->codec->extradata[1] = 0;
|
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if (pb->seekable) { |
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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)
next_tag_read(s, &bin->fsize); |
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if (!bin->video_size) { |
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predict_width(st->codec, bin->fsize, got_width);
calculate_height(st->codec, bin->fsize); |
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} |
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avio_seek(pb, 0, SEEK_SET); |
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}
return 0; |
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} |
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#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;
}
|
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static int xbin_read_header(AVFormatContext *s) |
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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)
return AVERROR(ENOMEM);
|
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avio_skip(pb, 5); |
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st->codec->width = avio_rl16(pb)<<3;
st->codec->height = avio_rl16(pb); |
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fontheight = avio_r8(pb); |
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st->codec->height *= fontheight; |
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flags = avio_r8(pb); |
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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); |
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st->codec->codec_id = flags & 4 ? AV_CODEC_ID_XBIN : AV_CODEC_ID_BINTEXT; |
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|
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st->codec->extradata = av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
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if (!st->codec->extradata)
return AVERROR(ENOMEM);
st->codec->extradata[0] = fontheight;
st->codec->extradata[1] = flags; |
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if (avio_read(pb, st->codec->extradata + 2, st->codec->extradata_size - 2) < 0) |
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return AVERROR(EIO);
|
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if (pb->seekable) { |
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bin->fsize = avio_size(pb) - 9 - st->codec->extradata_size; |
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ff_sauce_read(s, &bin->fsize, NULL, 0); |
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avio_seek(pb, 9 + st->codec->extradata_size, SEEK_SET); |
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}
return 0;
}
#endif /* CONFIG_XBIN_DEMUXER */
#if CONFIG_ADF_DEMUXER |
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static int adf_read_header(AVFormatContext *s) |
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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)
return AVERROR(ENOMEM); |
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st->codec->codec_id = AV_CODEC_ID_BINTEXT; |
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st->codec->extradata_size = 2 + 48 + 4096; |
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st->codec->extradata = av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
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if (!st->codec->extradata)
return AVERROR(ENOMEM);
st->codec->extradata[0] = 16;
st->codec->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT;
|
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if (avio_read(pb, st->codec->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->codec->extradata + 2 + 24, 24) < 0) |
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return AVERROR(EIO); |
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if (avio_read(pb, st->codec->extradata + 2 + 48, 4096) < 0) |
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return AVERROR(EIO);
|
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if (pb->seekable) { |
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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->codec->width = 80<<3;
ff_sauce_read(s, &bin->fsize, &got_width, 0); |
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if (!bin->video_size) |
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calculate_height(st->codec, bin->fsize); |
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avio_seek(pb, 1 + 192 + 4096, SEEK_SET); |
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}
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)
{ |
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if (p->buf_size < sizeof(idf_magic))
return 0;
if (!memcmp(p->buf, idf_magic, sizeof(idf_magic))) |
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return AVPROBE_SCORE_MAX;
return 0;
}
|
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static int idf_read_header(AVFormatContext *s) |
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{
BinDemuxContext *bin = s->priv_data; |
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AVIOContext *pb = s->pb; |
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AVStream *st;
int got_width = 0;
|
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if (!pb->seekable) |
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return AVERROR(EIO);
|
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st = init_stream(s); |
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if (!st)
return AVERROR(ENOMEM); |
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st->codec->codec_id = AV_CODEC_ID_IDF; |
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st->codec->extradata_size = 2 + 48 + 4096; |
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st->codec->extradata = av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
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if (!st->codec->extradata)
return AVERROR(ENOMEM);
st->codec->extradata[0] = 16;
st->codec->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT;
|
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avio_seek(pb, avio_size(pb) - 4096 - 48, SEEK_SET); |
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|
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if (avio_read(pb, st->codec->extradata + 2 + 48, 4096) < 0) |
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return AVERROR(EIO); |
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if (avio_read(pb, st->codec->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->video_size) |
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calculate_height(st->codec, bin->fsize); |
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avio_seek(pb, 12, SEEK_SET); |
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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;
}
|
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#define OFFSET(x) offsetof(BinDemuxContext, x)
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(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
{ "framerate", "set framerate (frames per second)", OFFSET(framerate), AV_OPT_TYPE_STRING, {.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, \
}}
|
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#if CONFIG_BINTEXT_DEMUXER
AVInputFormat ff_bintext_demuxer = { |
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.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", |
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.priv_class = CLASS("Binary text demuxer"), |
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};
#endif
#if CONFIG_XBIN_DEMUXER
AVInputFormat ff_xbin_demuxer = { |
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.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, |
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.priv_class = CLASS("eXtended BINary text (XBIN) demuxer"), |
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};
#endif
#if CONFIG_ADF_DEMUXER
AVInputFormat ff_adf_demuxer = { |
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.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", |
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.priv_class = CLASS("Artworx Data Format demuxer"), |
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};
#endif
#if CONFIG_IDF_DEMUXER
AVInputFormat ff_idf_demuxer = { |
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.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", |
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.priv_class = CLASS("iCE Draw File demuxer"), |
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};
#endif |