From eda178d273cd2558fd727e98c503dfa726621d6c Mon Sep 17 00:00:00 2001
From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Tue, 29 Jan 2008 09:25:49 +0000
Subject: [PATCH] SMPTE 421 Annex L format demuxer

Originally committed as revision 11661 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/Makefile     |   1 +
 libavformat/allformats.c |   1 +
 libavformat/avformat.h   |   4 +-
 libavformat/vc1test.c    | 112 +++++++++++++++++++++++++++++++++++++++
 4 files changed, 116 insertions(+), 2 deletions(-)
 create mode 100644 libavformat/vc1test.c

diff --git a/libavformat/Makefile b/libavformat/Makefile
index 2224ba0c27..9172c1b4d9 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -162,6 +162,7 @@ OBJS-$(CONFIG_TIERTEXSEQ_DEMUXER)        += tiertexseq.o
 OBJS-$(CONFIG_TTA_DEMUXER)               += tta.o
 OBJS-$(CONFIG_TXD_DEMUXER)               += txd.o
 OBJS-$(CONFIG_VC1_DEMUXER)               += raw.o
+OBJS-$(CONFIG_VC1T_DEMUXER)              += vc1test.o
 OBJS-$(CONFIG_VMD_DEMUXER)               += sierravmd.o
 OBJS-$(CONFIG_VOC_DEMUXER)               += vocdec.o voc.o
 OBJS-$(CONFIG_VOC_MUXER)                 += vocenc.o voc.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 5fdf3a03eb..be27055801 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -156,6 +156,7 @@ void av_register_all(void)
     REGISTER_DEMUXER  (TTA, tta);
     REGISTER_DEMUXER  (TXD, txd);
     REGISTER_DEMUXER  (VC1, vc1);
+    REGISTER_DEMUXER  (VC1T, vc1t);
     REGISTER_DEMUXER  (VMD, vmd);
     REGISTER_MUXDEMUX (VOC, voc);
     REGISTER_MUXDEMUX (WAV, wav);
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index ddebb7714e..b28014895c 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -21,8 +21,8 @@
 #ifndef FFMPEG_AVFORMAT_H
 #define FFMPEG_AVFORMAT_H
 
-#define LIBAVFORMAT_VERSION_INT ((52<<16)+(6<<8)+0)
-#define LIBAVFORMAT_VERSION     52.6.0
+#define LIBAVFORMAT_VERSION_INT ((52<<16)+(7<<8)+0)
+#define LIBAVFORMAT_VERSION     52.7.0
 #define LIBAVFORMAT_BUILD       LIBAVFORMAT_VERSION_INT
 
 #define LIBAVFORMAT_IDENT       "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
diff --git a/libavformat/vc1test.c b/libavformat/vc1test.c
new file mode 100644
index 0000000000..c8340179cf
--- /dev/null
+++ b/libavformat/vc1test.c
@@ -0,0 +1,112 @@
+/*
+ * VC1 Test Bitstreams Format Demuxer
+ * Copyright (c) 2006, 2008 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
+ */
+
+/**
+ * @file vc1test.c
+ * VC1 test bitstream file demuxer
+ * by Konstantin Shishkov
+ * Format specified in SMPTE standard 421 Annex L
+ */
+
+#include "avformat.h"
+
+#define VC1_EXTRADATA_SIZE 4
+
+static int vc1t_probe(AVProbeData *p)
+{
+    if (p->buf[3] != 0xC5 && AV_RL32(&p->buf[4]) != 4)
+        return 0;
+
+    return AVPROBE_SCORE_MAX;
+}
+
+static int vc1t_read_header(AVFormatContext *s,
+                           AVFormatParameters *ap)
+{
+    ByteIOContext *pb = s->pb;
+    AVStream *st;
+    int fps, frames;
+
+    frames = get_le24(pb);
+    if(get_byte(pb) != 0xC5 || get_le32(pb) != 4)
+        return -1;
+
+    /* init video codec */
+    st = av_new_stream(s, 0);
+    if (!st)
+        return -1;
+
+    st->codec->codec_type = CODEC_TYPE_VIDEO;
+    st->codec->codec_id = CODEC_ID_WMV3;
+
+    st->codec->extradata = av_malloc(VC1_EXTRADATA_SIZE);
+    st->codec->extradata_size = VC1_EXTRADATA_SIZE;
+    get_buffer(pb, st->codec->extradata, VC1_EXTRADATA_SIZE);
+    st->codec->height = get_le32(pb);
+    st->codec->width = get_le32(pb);
+    if(get_le32(pb) != 0xC)
+        return -1;
+    url_fskip(pb, 8);
+    fps = get_le32(pb);
+    if(fps == -1)
+        av_set_pts_info(st, 32, 1, 1000);
+    else{
+        av_set_pts_info(st, 24, 1, fps);
+        st->duration = frames;
+    }
+
+    return 0;
+}
+
+static int vc1t_read_packet(AVFormatContext *s,
+                           AVPacket *pkt)
+{
+    ByteIOContext *pb = s->pb;
+    int frame_size;
+    int keyframe = 0;
+    uint32_t pts;
+
+    if(url_feof(pb))
+        return AVERROR(EIO);
+
+    frame_size = get_le24(pb);
+    if(get_byte(pb) & 0x80)
+        keyframe = 1;
+    pts = get_le32(pb);
+    if(av_get_packet(pb, pkt, frame_size) < 0)
+        return AVERROR(EIO);
+    if(s->streams[0]->time_base.den == 1000)
+        pkt->pts = pts;
+    pkt->flags |= keyframe ? PKT_FLAG_KEY : 0;
+    pkt->pos -= 8;
+
+    return pkt->size;
+}
+
+AVInputFormat vc1t_demuxer = {
+    "vc1test",
+    "VC1 test bitstream format",
+    0,
+    vc1t_probe,
+    vc1t_read_header,
+    vc1t_read_packet,
+    .flags = AVFMT_GENERIC_INDEX,
+};