diff options
author | Peter Ross <pross@xvid.org> | 2013-01-06 13:58:15 +1100 |
---|---|---|
committer | Peter Ross <pross@xvid.org> | 2013-01-06 13:58:15 +1100 |
commit | 3d0994be2fa912d76835057276243c4c75b71200 (patch) | |
tree | 833fd31e6ff5aa5cae73f0771508b561b14d0de4 /libavformat | |
parent | e27c470f2b63a0b0ceb982994c926d8ab21d1959 (diff) | |
download | ffmpeg-streaming-3d0994be2fa912d76835057276243c4c75b71200.zip ffmpeg-streaming-3d0994be2fa912d76835057276243c4c75b71200.tar.gz |
Megalux Frame demuxer
Diffstat (limited to 'libavformat')
-rw-r--r-- | libavformat/Makefile | 1 | ||||
-rw-r--r-- | libavformat/allformats.c | 1 | ||||
-rw-r--r-- | libavformat/frmdec.c | 103 |
3 files changed, 105 insertions, 0 deletions
diff --git a/libavformat/Makefile b/libavformat/Makefile index a857178..7560597 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -136,6 +136,7 @@ OBJS-$(CONFIG_FLV_MUXER) += flvenc.o avc.o OBJS-$(CONFIG_FOURXM_DEMUXER) += 4xm.o OBJS-$(CONFIG_FRAMECRC_MUXER) += framecrcenc.o framehash.o OBJS-$(CONFIG_FRAMEMD5_MUXER) += md5enc.o framehash.o +OBJS-$(CONFIG_FRM_DEMUXER) += frmdec.o OBJS-$(CONFIG_GIF_MUXER) += gif.o OBJS-$(CONFIG_GIF_DEMUXER) += gifdec.o OBJS-$(CONFIG_GSM_DEMUXER) += gsmdec.o diff --git a/libavformat/allformats.c b/libavformat/allformats.c index c3aa187..83094f9 100644 --- a/libavformat/allformats.c +++ b/libavformat/allformats.c @@ -122,6 +122,7 @@ void av_register_all(void) REGISTER_DEMUXER (FOURXM, fourxm); REGISTER_MUXER (FRAMECRC, framecrc); REGISTER_MUXER (FRAMEMD5, framemd5); + REGISTER_DEMUXER (FRM, frm); REGISTER_MUXDEMUX(G722, g722); REGISTER_MUXDEMUX(G723_1, g723_1); REGISTER_DEMUXER (G729, g729); diff --git a/libavformat/frmdec.c b/libavformat/frmdec.c new file mode 100644 index 0000000..b9b3ed7 --- /dev/null +++ b/libavformat/frmdec.c @@ -0,0 +1,103 @@ +/* + * Megalux Frame 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 + * Megalux Frame demuxer + */ + +#include "libavutil/intreadwrite.h" +#include "avformat.h" +#include "riff.h" + +static const AVCodecTag frm_pix_fmt_tags[] = { + { PIX_FMT_RGB555, 1 }, + { PIX_FMT_BGR32, 2 }, + { PIX_FMT_RGB24, 3 }, + { PIX_FMT_BGR0, 4 }, + { PIX_FMT_BGR0, 5 }, +}; + +typedef struct { + int count; +} FrmContext; + +static int frm_read_probe(AVProbeData *p) +{ + if (p->buf_size > 8 && + p->buf[0] == 'F' && p->buf[1] == 'R' && p->buf[2] == 'M' && + AV_RL16(&p->buf[4]) && AV_RL16(&p->buf[6])) + return AVPROBE_SCORE_MAX / 2; + return 0; +} + +static int frm_read_header(AVFormatContext *avctx) +{ + AVIOContext *pb = avctx->pb; + AVStream *st = avformat_new_stream(avctx, 0); + if (!st) + return AVERROR(ENOMEM); + + st->codec->codec_type = AVMEDIA_TYPE_VIDEO; + st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; + avio_skip(pb, 3); + + st->codec->pix_fmt = ff_codec_get_id(frm_pix_fmt_tags, avio_r8(pb)); + if (!st->codec->pix_fmt) + return AVERROR_INVALIDDATA; + + st->codec->codec_tag = 0; + st->codec->width = avio_rl16(pb); + st->codec->height = avio_rl16(pb); + return 0; +} + +static int frm_read_packet(AVFormatContext *avctx, AVPacket *pkt) +{ + FrmContext *s = avctx->priv_data; + AVCodecContext *stc = avctx->streams[0]->codec; + int packet_size, ret; + + if (s->count) + return AVERROR_EOF; + + packet_size = avpicture_get_size(stc->pix_fmt, stc->width, stc->height); + if (packet_size < 0) + return AVERROR_INVALIDDATA; + + ret = av_get_packet(avctx->pb, pkt, packet_size); + if (ret < 0) + return ret; + + pkt->stream_index = 0; + s->count++; + + return 0; +} + +AVInputFormat ff_frm_demuxer = { + .name = "frm", + .priv_data_size = sizeof(FrmContext), + .long_name = NULL_IF_CONFIG_SMALL("Megalux Frame"), + .read_probe = frm_read_probe, + .read_header = frm_read_header, + .read_packet = frm_read_packet, +}; |