avformat: add SER demuxer

1 files changed, 146 insertions, 0 deletions

diff --git a/libavformat/serdec.c b/libavformat/serdec.c
new file mode 100644
index 0000000000..25e6f635af
--- /dev/null
+++ b/libavformat/serdec.c
@@ -0,0 +1,146 @@
+/*
+ * SER demuxer
+ * Copyright (c) 2018 Paul B Mahol
+ *
+ * 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
+ */
+
+#include "libavutil/imgutils.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/opt.h"
+#include "internal.h"
+#include "avformat.h"
+
+#define SER_MAGIC "LUCAM-RECORDER"
+
+typedef struct SERDemuxerContext {
+    const AVClass *class;
+    int width, height;
+    AVRational framerate;
+    int64_t end;
+} SERDemuxerContext;
+
+static int ser_probe(AVProbeData *pd)
+{
+    if (memcmp(pd->buf, SER_MAGIC, 14) == 0)
+        return AVPROBE_SCORE_MAX;
+    else
+        return 0;
+}
+
+static int ser_read_header(AVFormatContext *s)
+{
+    SERDemuxerContext *ser = s->priv_data;
+    enum AVPixelFormat pix_fmt;
+    int depth, color_id, endian;
+    int packet_size;
+    AVStream *st;
+
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    avio_skip(s->pb, 14);
+    avio_skip(s->pb, 4);
+    color_id = avio_rl32(s->pb);
+    endian = avio_rl32(s->pb);
+    ser->width = avio_rl32(s->pb);
+    ser->height = avio_rl32(s->pb);
+    depth = avio_rl32(s->pb);
+    st->nb_frames = st->duration = avio_rl32(s->pb);
+    avio_skip(s->pb, 120);
+    avio_skip(s->pb, 8);
+    avio_skip(s->pb, 8);
+
+    switch (color_id) {
+    case   0: pix_fmt = depth <= 8 ? AV_PIX_FMT_GRAY8       : endian ? AV_PIX_FMT_GRAY16LE       : AV_PIX_FMT_GRAY16BE;       break;
+    case   8: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_RGGB8 : endian ? AV_PIX_FMT_BAYER_RGGB16LE : AV_PIX_FMT_BAYER_RGGB16BE; break;
+    case   9: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_GRBG8 : endian ? AV_PIX_FMT_BAYER_GRBG16LE : AV_PIX_FMT_BAYER_GRBG16BE; break;
+    case  10: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_GBRG8 : endian ? AV_PIX_FMT_BAYER_GBRG16LE : AV_PIX_FMT_BAYER_GBRG16BE; break;
+    case  11: pix_fmt = depth <= 8 ? AV_PIX_FMT_BAYER_BGGR8 : endian ? AV_PIX_FMT_BAYER_BGGR16LE : AV_PIX_FMT_BAYER_BGGR16BE; break;
+    case 100: pix_fmt = depth <= 8 ? AV_PIX_FMT_RGB24       : endian ? AV_PIX_FMT_RGB48LE        : AV_PIX_FMT_RGB48BE;        break;
+    case 101: pix_fmt = depth <= 8 ? AV_PIX_FMT_BGR24       : endian ? AV_PIX_FMT_BGR48LE        : AV_PIX_FMT_BGR48BE;        break;
+    default:
+        return AVERROR_PATCHWELCOME;
+    }
+
+    st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+    st->codecpar->codec_id = s->iformat->raw_codec_id;
+
+    avpriv_set_pts_info(st, 64, ser->framerate.den, ser->framerate.num);
+
+    st->codecpar->width  = ser->width;
+    st->codecpar->height = ser->height;
+    st->codecpar->format = pix_fmt;
+    packet_size = av_image_get_buffer_size(st->codecpar->format, ser->width, ser->height, 1);
+    if (packet_size < 0)
+        return packet_size;
+    ser->end = 178 + st->nb_frames * packet_size;
+    s->packet_size = packet_size;
+    st->codecpar->bit_rate = av_rescale_q(s->packet_size,
+                                       (AVRational){8,1}, st->time_base);
+
+    return 0;
+}
+
+
+static int ser_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    SERDemuxerContext *ser = s->priv_data;
+    int64_t pos;
+    int ret;
+
+    pos = avio_tell(s->pb);
+    if (pos >= ser->end)
+        return AVERROR_EOF;
+
+    ret = av_get_packet(s->pb, pkt, s->packet_size);
+    pkt->pts = pkt->dts = (pkt->pos - s->internal->data_offset) / s->packet_size;
+
+    pkt->stream_index = 0;
+    if (ret < 0)
+        return ret;
+    return 0;
+}
+
+#define OFFSET(x) offsetof(SERDemuxerContext, x)
+#define DEC AV_OPT_FLAG_DECODING_PARAM
+static const AVOption ser_options[] = {
+    { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
+    { NULL },
+};
+
+static const AVClass ser_demuxer_class = {
+    .class_name = "ser demuxer",
+    .item_name  = av_default_item_name,
+    .option     = ser_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_ser_demuxer = {
+    .name           = "ser",
+    .long_name      = NULL_IF_CONFIG_SMALL("SER (Simple uncompressed video format for astronomical capturing)"),
+    .priv_data_size = sizeof(SERDemuxerContext),
+    .read_probe     = ser_probe,
+    .read_header    = ser_read_header,
+    .read_packet    = ser_read_packet,
+    .flags          = AVFMT_GENERIC_INDEX,
+    .extensions     = "ser",
+    .raw_codec_id   = AV_CODEC_ID_RAWVIDEO,
+    .priv_class     = &ser_demuxer_class,
+};