RSD demuxer

Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 161 insertions, 0 deletions

diff --git a/libavformat/rsd.c b/libavformat/rsd.c
new file mode 100644
index 0000000000..b9352551c7
--- /dev/null
+++ b/libavformat/rsd.c
@@ -0,0 +1,161 @@
+/*
+ * RSD demuxer
+ * Copyright (c) 2013 James Almer
+ *
+ * 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 "libavcodec/bytestream.h"
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+#include "avio.h"
+#include "internal.h"
+
+static const AVCodecTag rsd_tags[] = {
+    { AV_CODEC_ID_ADPCM_THP,       MKTAG('G','A','D','P') },
+    { AV_CODEC_ID_PCM_S16BE,       MKTAG('P','C','M','B') },
+    { AV_CODEC_ID_PCM_S16LE,       MKTAG('P','C','M',' ') },
+    { AV_CODEC_ID_NONE, 0 },
+};
+
+static const uint32_t rsd_unsupported_tags[] = {
+    MKTAG('O','G','G',' '),
+    MKTAG('R','A','D','P'),
+    MKTAG('V','A','G',' '),
+    MKTAG('W','A','D','P'),
+    MKTAG('X','A','D','P'),
+    MKTAG('X','M','A',' '),
+};
+
+static int rsd_probe(AVProbeData *p)
+{
+    if (!memcmp(p->buf, "RSD", 3) &&
+        p->buf[3] - '0' >= 2 && p->buf[3] - '0' <= 6)
+        return AVPROBE_SCORE_EXTENSION;
+    return 0;
+}
+
+static int rsd_read_header(AVFormatContext *s)
+{
+    AVIOContext *pb = s->pb;
+    int i, version, start = 0x800;
+    AVCodecContext *codec;
+    AVStream *st = avformat_new_stream(s, NULL);
+
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    avio_skip(pb, 3); // "RSD"
+    version = avio_r8(pb) - '0';
+
+    codec = st->codec;
+    codec->codec_type = AVMEDIA_TYPE_AUDIO;
+    codec->codec_tag  = avio_rl32(pb);
+    codec->codec_id   = ff_codec_get_id(rsd_tags, codec->codec_tag);
+    if (!codec->codec_id) {
+        char tag_buf[5];
+
+        av_get_codec_tag_string(tag_buf, sizeof(tag_buf), codec->codec_tag);
+        for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
+            if (codec->codec_tag == rsd_unsupported_tags[i]) {
+                avpriv_request_sample(s, "Codec tag: %s", tag_buf);
+                return AVERROR_PATCHWELCOME;
+            }
+        }
+        av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
+        return AVERROR_INVALIDDATA;
+    }
+
+    codec->channels = avio_rl32(pb);
+    if (!codec->channels)
+        return AVERROR_INVALIDDATA;
+
+    avio_skip(pb, 4); // Bit depth
+    codec->sample_rate = avio_rl32(pb);
+    if (!codec->sample_rate)
+        return AVERROR_INVALIDDATA;
+
+    avio_skip(pb, 4); // Unknown
+
+    switch (codec->codec_id) {
+    case AV_CODEC_ID_ADPCM_THP:
+        /* RSD3GADP is mono, so only alloc enough memory
+           to store the coeff table for a single channel. */
+
+        codec->extradata_size = 32;
+        codec->extradata = av_malloc(codec->extradata_size);
+        if (!codec->extradata)
+            return AVERROR(ENOMEM);
+
+        start = avio_rl32(pb);
+
+        if (avio_read(s->pb, codec->extradata, 32) != 32)
+            return AVERROR_INVALIDDATA;
+
+        for (i = 0; i < 16; i++)
+            AV_WB16(codec->extradata + i * 2, AV_RL16(codec->extradata + i * 2));
+
+        if (pb->seekable)
+            st->duration = (avio_size(pb) - start) / 8 * 14;
+        break;
+    case AV_CODEC_ID_PCM_S16LE:
+    case AV_CODEC_ID_PCM_S16BE:
+        if (version != 4)
+            start = avio_rl32(pb);
+
+        if (pb->seekable)
+            st->duration = (avio_size(pb) - start) / 2 / codec->channels;
+        break;
+    }
+
+    avio_skip(pb, start - avio_tell(pb));
+
+    avpriv_set_pts_info(st, 64, 1, codec->sample_rate);
+
+    return 0;
+}
+
+static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    int ret, size = 1024;
+
+    if (url_feof(s->pb))
+        return AVERROR_EOF;
+
+    ret = av_get_packet(s->pb, pkt, size);
+
+    if (ret != size) {
+        if (ret < 0) {
+            av_free_packet(pkt);
+            return ret;
+        }
+        av_shrink_packet(pkt, ret);
+    }
+    pkt->stream_index = 0;
+
+    return ret;
+}
+
+AVInputFormat ff_rsd_demuxer = {
+    .name           =   "rsd",
+    .long_name      =   NULL_IF_CONFIG_SMALL("GameCube RSD"),
+    .read_probe     =   rsd_probe,
+    .read_header    =   rsd_read_header,
+    .read_packet    =   rsd_read_packet,
+    .extensions     =   "rsd",
+    .codec_tag      =   (const AVCodecTag* const []){rsd_tags, 0},
+};