making act segmenter

1 files changed, 96 insertions, 0 deletions

diff --git a/ffmpeg/libavformat/daud.c b/ffmpeg/libavformat/daud.c
new file mode 100644
index 0000000..fb62ab1
--- /dev/null
+++ b/ffmpeg/libavformat/daud.c
@@ -0,0 +1,96 @@
+/*
+ * D-Cinema audio demuxer
+ * Copyright (c) 2005 Reimar Döffinger
+ *
+ * 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/channel_layout.h"
+#include "avformat.h"
+
+static int daud_header(AVFormatContext *s) {
+    AVStream *st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+    st->codec->codec_id = AV_CODEC_ID_PCM_S24DAUD;
+    st->codec->codec_tag = MKTAG('d', 'a', 'u', 'd');
+    st->codec->channels = 6;
+    st->codec->channel_layout = AV_CH_LAYOUT_5POINT1;
+    st->codec->sample_rate = 96000;
+    st->codec->bit_rate = 3 * 6 * 96000 * 8;
+    st->codec->block_align = 3 * 6;
+    st->codec->bits_per_coded_sample = 24;
+    return 0;
+}
+
+static int daud_packet(AVFormatContext *s, AVPacket *pkt) {
+    AVIOContext *pb = s->pb;
+    int ret, size;
+    if (url_feof(pb))
+        return AVERROR(EIO);
+    size = avio_rb16(pb);
+    avio_rb16(pb); // unknown
+    ret = av_get_packet(pb, pkt, size);
+    pkt->stream_index = 0;
+    return ret;
+}
+
+static int daud_write_header(struct AVFormatContext *s)
+{
+    AVCodecContext *codec = s->streams[0]->codec;
+    if (codec->channels!=6 || codec->sample_rate!=96000)
+        return -1;
+    return 0;
+}
+
+static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
+{
+    if (pkt->size > 65535) {
+        av_log(s, AV_LOG_ERROR,
+               "Packet size too large for s302m. (%d > 65535)\n", pkt->size);
+        return -1;
+    }
+    avio_wb16(s->pb, pkt->size);
+    avio_wb16(s->pb, 0x8010); // unknown
+    avio_write(s->pb, pkt->data, pkt->size);
+    avio_flush(s->pb);
+    return 0;
+}
+
+#if CONFIG_DAUD_DEMUXER
+AVInputFormat ff_daud_demuxer = {
+    .name           = "daud",
+    .long_name      = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
+    .read_header    = daud_header,
+    .read_packet    = daud_packet,
+    .extensions     = "302,daud",
+};
+#endif
+
+#if CONFIG_DAUD_MUXER
+AVOutputFormat ff_daud_muxer = {
+    .name         = "daud",
+    .long_name    = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
+    .extensions   = "302",
+    .audio_codec  = AV_CODEC_ID_PCM_S24DAUD,
+    .video_codec  = AV_CODEC_ID_NONE,
+    .write_header = daud_write_header,
+    .write_packet = daud_write_packet,
+    .flags        = AVFMT_NOTIMESTAMPS,
+};
+#endif