Add raw HEVC demuxer

Signed-off-by: Anton Khirnov <anton@khirnov.net>

1 files changed, 64 insertions, 0 deletions

diff --git a/libavformat/hevcdec.c b/libavformat/hevcdec.c
new file mode 100644
index 0000000000..65a3cdfb3c
--- /dev/null
+++ b/libavformat/hevcdec.c
@@ -0,0 +1,64 @@
+/*
+ * RAW HEVC video demuxer
+ * Copyright (c) 2013 Dirk Farin <dirk.farin@gmail.com>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavcodec/hevc.h"
+
+#include "avformat.h"
+#include "rawdec.h"
+
+static int hevc_probe(AVProbeData *p)
+{
+    uint32_t code = -1;
+    int vps = 0, sps = 0, pps = 0, irap = 0;
+    int i;
+
+    for (i = 0; i < p->buf_size - 1; i++) {
+        code = (code << 8) + p->buf[i];
+        if ((code & 0xffffff00) == 0x100) {
+            uint8_t nal2 = p->buf[i + 1];
+            int type = (code & 0x7E) >> 1;
+
+            if (code & 0x81) // forbidden and reserved zero bits
+                return 0;
+
+            if (nal2 & 0xf8) // reserved zero
+                return 0;
+
+            switch (type) {
+            case NAL_VPS:        vps++;  break;
+            case NAL_SPS:        sps++;  break;
+            case NAL_PPS:        pps++;  break;
+            case NAL_BLA_N_LP:
+            case NAL_BLA_W_LP:
+            case NAL_BLA_W_RADL:
+            case NAL_CRA_NUT:
+            case NAL_IDR_N_LP:
+            case NAL_IDR_W_RADL: irap++; break;
+            }
+        }
+    }
+
+    if (vps && sps && pps && irap)
+        return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg
+    return 0;
+}
+
+FF_DEF_RAWVIDEO_DEMUXER(hevc, "raw HEVC video", hevc_probe, "hevc,h265,265", AV_CODEC_ID_HEVC)