making act segmenter

1 files changed, 252 insertions, 0 deletions

diff --git a/ffmpeg/libavformat/siff.c b/ffmpeg/libavformat/siff.c
new file mode 100644
index 0000000..c8b68ab
--- /dev/null
+++ b/ffmpeg/libavformat/siff.c
@@ -0,0 +1,252 @@
+/*
+ * Beam Software SIFF demuxer
+ * Copyright (c) 2007 Konstantin Shishkov
+ *
+ * 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 "libavutil/intreadwrite.h"
+#include "avformat.h"
+#include "internal.h"
+#include "avio_internal.h"
+
+enum SIFFTags{
+    TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
+    TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
+    TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
+    TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
+    TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
+    TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
+};
+
+enum VBFlags{
+    VB_HAS_GMC     = 0x01,
+    VB_HAS_AUDIO   = 0x04,
+    VB_HAS_VIDEO   = 0x08,
+    VB_HAS_PALETTE = 0x10,
+    VB_HAS_LENGTH  = 0x20
+};
+
+typedef struct SIFFContext{
+    int frames;
+    int cur_frame;
+    int rate;
+    int bits;
+    int block_align;
+
+    int has_video;
+    int has_audio;
+
+    int curstrm;
+    int pktsize;
+    int gmcsize;
+    int sndsize;
+
+    int flags;
+    uint8_t gmc[4];
+}SIFFContext;
+
+static int siff_probe(AVProbeData *p)
+{
+    uint32_t tag = AV_RL32(p->buf + 8);
+    /* check file header */
+    if (AV_RL32(p->buf) != TAG_SIFF ||
+        (tag != TAG_VBV1 && tag != TAG_SOUN))
+        return 0;
+    return AVPROBE_SCORE_MAX;
+}
+
+static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
+{
+    AVStream *ast;
+    ast = avformat_new_stream(s, NULL);
+    if (!ast)
+        return AVERROR(ENOMEM);
+    ast->codec->codec_type      = AVMEDIA_TYPE_AUDIO;
+    ast->codec->codec_id        = AV_CODEC_ID_PCM_U8;
+    ast->codec->channels        = 1;
+    ast->codec->channel_layout  = AV_CH_LAYOUT_MONO;
+    ast->codec->bits_per_coded_sample = 8;
+    ast->codec->sample_rate     = c->rate;
+    avpriv_set_pts_info(ast, 16, 1, c->rate);
+    ast->start_time = 0;
+    return 0;
+}
+
+static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
+{
+    AVStream *st;
+    int width, height;
+
+    if (avio_rl32(pb) != TAG_VBHD){
+        av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
+        return AVERROR_INVALIDDATA;
+    }
+    if(avio_rb32(pb) != 32){
+        av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
+        return AVERROR_INVALIDDATA;
+    }
+    if(avio_rl16(pb) != 1){
+        av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
+        return AVERROR_INVALIDDATA;
+    }
+    width = avio_rl16(pb);
+    height = avio_rl16(pb);
+    avio_skip(pb, 4);
+    c->frames = avio_rl16(pb);
+    if(!c->frames){
+        av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
+        return AVERROR_INVALIDDATA;
+    }
+    c->bits = avio_rl16(pb);
+    c->rate = avio_rl16(pb);
+    c->block_align = c->rate * (c->bits >> 3);
+
+    avio_skip(pb, 16); //zeroes
+
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+    st->codec->codec_id   = AV_CODEC_ID_VB;
+    st->codec->codec_tag  = MKTAG('V', 'B', 'V', '1');
+    st->codec->width      = width;
+    st->codec->height     = height;
+    st->codec->pix_fmt    = AV_PIX_FMT_PAL8;
+    st->nb_frames         =
+    st->duration          = c->frames;
+    avpriv_set_pts_info(st, 16, 1, 12);
+
+    c->cur_frame = 0;
+    c->has_video = 1;
+    c->has_audio = !!c->rate;
+    c->curstrm = -1;
+    if (c->has_audio && create_audio_stream(s, c) < 0)
+        return AVERROR(ENOMEM);
+    return 0;
+}
+
+static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
+{
+    if (avio_rl32(pb) != TAG_SHDR){
+        av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
+        return AVERROR_INVALIDDATA;
+    }
+    if(avio_rb32(pb) != 8){
+        av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
+        return AVERROR_INVALIDDATA;
+    }
+    avio_skip(pb, 4); //unknown value
+    c->rate = avio_rl16(pb);
+    c->bits = avio_rl16(pb);
+    c->block_align = c->rate * (c->bits >> 3);
+    return create_audio_stream(s, c);
+}
+
+static int siff_read_header(AVFormatContext *s)
+{
+    AVIOContext *pb = s->pb;
+    SIFFContext *c = s->priv_data;
+    uint32_t tag;
+    int ret;
+
+    if (avio_rl32(pb) != TAG_SIFF)
+        return AVERROR_INVALIDDATA;
+    avio_skip(pb, 4); //ignore size
+    tag = avio_rl32(pb);
+
+    if (tag != TAG_VBV1 && tag != TAG_SOUN){
+        av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    if (tag == TAG_VBV1 && (ret = siff_parse_vbv1(s, c, pb)) < 0)
+        return ret;
+    if (tag == TAG_SOUN && (ret = siff_parse_soun(s, c, pb)) < 0)
+        return ret;
+    if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')){
+        av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
+        return AVERROR_INVALIDDATA;
+    }
+    avio_skip(pb, 4); //ignore size
+
+    return 0;
+}
+
+static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    SIFFContext *c = s->priv_data;
+    int size;
+
+    if (c->has_video){
+        if (c->cur_frame >= c->frames)
+            return AVERROR_EOF;
+        if (c->curstrm == -1){
+            c->pktsize = avio_rl32(s->pb) - 4;
+            c->flags = avio_rl16(s->pb);
+            c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
+            if (c->gmcsize)
+                avio_read(s->pb, c->gmc, c->gmcsize);
+            c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb): 0;
+            c->curstrm = !!(c->flags & VB_HAS_AUDIO);
+        }
+
+        if (!c->curstrm){
+            size = c->pktsize - c->sndsize - c->gmcsize - 2;
+            size = ffio_limit(s->pb, size);
+            if(size < 0 || c->pktsize < c->sndsize)
+                return AVERROR_INVALIDDATA;
+            if (av_new_packet(pkt, size + c->gmcsize + 2) < 0)
+                return AVERROR(ENOMEM);
+            AV_WL16(pkt->data, c->flags);
+            if (c->gmcsize)
+                memcpy(pkt->data + 2, c->gmc, c->gmcsize);
+            avio_read(s->pb, pkt->data + 2 + c->gmcsize, size);
+            pkt->stream_index = 0;
+            c->curstrm = -1;
+        }else{
+            if ((size = av_get_packet(s->pb, pkt, c->sndsize - 4)) < 0)
+                return AVERROR(EIO);
+            pkt->stream_index = 1;
+            pkt->duration     = size;
+            c->curstrm = 0;
+        }
+        if(!c->cur_frame || c->curstrm)
+            pkt->flags |= AV_PKT_FLAG_KEY;
+        if (c->curstrm == -1)
+            c->cur_frame++;
+    }else{
+        size = av_get_packet(s->pb, pkt, c->block_align);
+        if(!size)
+            return AVERROR_EOF;
+        if(size < 0)
+            return AVERROR(EIO);
+        pkt->duration = size;
+    }
+    return pkt->size;
+}
+
+AVInputFormat ff_siff_demuxer = {
+    .name           = "siff",
+    .long_name      = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
+    .priv_data_size = sizeof(SIFFContext),
+    .read_probe     = siff_probe,
+    .read_header    = siff_read_header,
+    .read_packet    = siff_read_packet,
+    .extensions     = "vb,son",
+};