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Original file line number | Diff line number | Diff line change |
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/* | ||
* Adobe Filmstrip demuxer | ||
* Copyright (c) 2010 Peter Ross | ||
* | ||
* 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 | ||
*/ | ||
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/** | ||
* @file libavformat/filmstripdec.c | ||
* Adobe Filmstrip demuxer | ||
*/ | ||
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#include "libavutil/intreadwrite.h" | ||
#include "avformat.h" | ||
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#define RAND_TAG MKBETAG('R','a','n','d') | ||
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typedef struct { | ||
int leading; | ||
} FilmstripDemuxContext; | ||
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static int read_header(AVFormatContext *s, | ||
AVFormatParameters *ap) | ||
{ | ||
FilmstripDemuxContext *film = s->priv_data; | ||
ByteIOContext *pb = s->pb; | ||
AVStream *st; | ||
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if (url_is_streamed(s->pb)) | ||
return AVERROR(EIO); | ||
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url_fseek(pb, url_fsize(pb) - 36, SEEK_SET); | ||
if (get_be32(pb) != RAND_TAG) { | ||
av_log(s, AV_LOG_ERROR, "magic number not found"); | ||
return AVERROR_INVALIDDATA; | ||
} | ||
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st = av_new_stream(s, 0); | ||
if (!st) | ||
return AVERROR(ENOMEM); | ||
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st->nb_frames = get_be32(pb); | ||
if (get_be16(pb) != 0) { | ||
av_log_ask_for_sample(s, "unsupported packing method\n"); | ||
return AVERROR_INVALIDDATA; | ||
} | ||
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url_fskip(pb, 2); | ||
st->codec->codec_type = CODEC_TYPE_VIDEO; | ||
st->codec->codec_id = CODEC_ID_RAWVIDEO; | ||
st->codec->pix_fmt = PIX_FMT_RGBA; | ||
st->codec->codec_tag = 0; /* no fourcc */ | ||
st->codec->width = get_be16(pb); | ||
st->codec->height = get_be16(pb); | ||
film->leading = get_be16(pb); | ||
av_set_pts_info(st, 64, 1, get_be16(pb)); | ||
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url_fseek(pb, 0, SEEK_SET); | ||
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return 0; | ||
} | ||
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static int read_packet(AVFormatContext *s, | ||
AVPacket *pkt) | ||
{ | ||
FilmstripDemuxContext *film = s->priv_data; | ||
AVStream *st = s->streams[0]; | ||
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if (url_feof(s->pb)) | ||
return AVERROR(EIO); | ||
pkt->dts = url_ftell(s->pb) / (st->codec->width * (st->codec->height + film->leading) * 4); | ||
pkt->size = av_get_packet(s->pb, pkt, st->codec->width * st->codec->height * 4); | ||
url_fskip(s->pb, st->codec->width * film->leading * 4); | ||
if (pkt->size < 0) | ||
return pkt->size; | ||
pkt->flags |= PKT_FLAG_KEY; | ||
return 0; | ||
} | ||
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static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) | ||
{ | ||
AVStream *st = s->streams[stream_index]; | ||
url_fseek(s->pb, FFMAX(timestamp, 0) * st->codec->width * st->codec->height * 4, SEEK_SET); | ||
return 0; | ||
} | ||
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AVInputFormat filmstrip_demuxer = { | ||
"filmstrip", | ||
NULL_IF_CONFIG_SMALL("Adobe Filmstrip"), | ||
sizeof(FilmstripDemuxContext), | ||
NULL, | ||
read_header, | ||
read_packet, | ||
NULL, | ||
read_seek, | ||
.extensions = "flm", | ||
}; |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,85 @@ | ||
/* | ||
* Adobe Filmstrip muxer | ||
* Copyright (c) 2010 Peter Ross | ||
* | ||
* 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 | ||
*/ | ||
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/** | ||
* @file libavformat/filmstripenc.c | ||
* Adobe Filmstrip muxer | ||
*/ | ||
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#include "libavutil/intreadwrite.h" | ||
#include "avformat.h" | ||
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#define RAND_TAG MKBETAG('R','a','n','d') | ||
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typedef struct { | ||
int nb_frames; | ||
} FilmstripMuxContext; | ||
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static int write_header(AVFormatContext *s) | ||
{ | ||
if (s->streams[0]->codec->pix_fmt != PIX_FMT_RGBA) { | ||
av_log(s, AV_LOG_ERROR, "only PIX_FMT_RGBA is supported\n"); | ||
return AVERROR_INVALIDDATA; | ||
} | ||
return 0; | ||
} | ||
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static int write_packet(AVFormatContext *s, AVPacket *pkt) | ||
{ | ||
FilmstripMuxContext *film = s->priv_data; | ||
put_buffer(s->pb, pkt->data, pkt->size); | ||
film->nb_frames++; | ||
return 0; | ||
} | ||
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static int write_trailer(AVFormatContext *s) | ||
{ | ||
FilmstripMuxContext *film = s->priv_data; | ||
ByteIOContext *pb = s->pb; | ||
AVStream *st = s->streams[0]; | ||
int i; | ||
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put_be32(pb, RAND_TAG); | ||
put_be32(pb, film->nb_frames); | ||
put_be16(pb, 0); // packing method | ||
put_be16(pb, 0); // reserved | ||
put_be16(pb, st->codec->width); | ||
put_be16(pb, st->codec->height); | ||
put_be16(pb, 0); // leading | ||
put_be16(pb, 1/av_q2d(st->codec->time_base)); | ||
for (i = 0; i < 16; i++) | ||
put_byte(pb, 0x00); // reserved | ||
put_flush_packet(pb); | ||
return 0; | ||
} | ||
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AVOutputFormat filmstrip_muxer = { | ||
"filmstrip", | ||
NULL_IF_CONFIG_SMALL("Adobe Filmstrip"), | ||
NULL, | ||
"flm", | ||
sizeof(FilmstripMuxContext), | ||
CODEC_ID_NONE, | ||
CODEC_ID_RAWVIDEO, | ||
write_header, | ||
write_packet, | ||
write_trailer, | ||
}; |