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-rw-r--r--libavformat/frmdec.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/libavformat/frmdec.c b/libavformat/frmdec.c
new file mode 100644
index 0000000000..a6f19afcd4
--- /dev/null
+++ b/libavformat/frmdec.c
@@ -0,0 +1,110 @@
+/*
+ * 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 "libavcodec/raw.h"
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+
+static const PixelFormatTag frm_pix_fmt_tags[] = {
+ { AV_PIX_FMT_RGB555, 1 },
+ { AV_PIX_FMT_RGB0, 2 },
+ { AV_PIX_FMT_RGB24, 3 },
+ { AV_PIX_FMT_BGR0, 4 },
+ { AV_PIX_FMT_BGRA, 5 },
+ { AV_PIX_FMT_NONE, 0 },
+};
+
+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 / 4;
+ 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 = avpriv_find_pix_fmt(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;
+
+ if (stc->pix_fmt == AV_PIX_FMT_BGRA) {
+ int i;
+ for (i = 3; i + 1 <= pkt->size; i += 4)
+ pkt->data[i] = 0xFF - pkt->data[i];
+ }
+
+ 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,
+};