From: hwren <hwr...@126.com>
Signed-off-by: hbj <ha...@pku.edu.cn>
Signed-off-by: hwren <hwr...@126.com>
---
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/avs3dec.c | 75 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 77 insertions(+)
create mode 100644 libavformat/avs3dec.c
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 26af859a28..b433a6029c 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -120,6 +120,7 @@ OBJS-$(CONFIG_AVR_DEMUXER) += avr.o pcm.o
OBJS-$(CONFIG_AVS_DEMUXER) += avs.o voc_packet.o vocdec.o voc.o
OBJS-$(CONFIG_AVS2_DEMUXER) += davs2.o rawdec.o
OBJS-$(CONFIG_AVS2_MUXER) += rawenc.o
+OBJS-$(CONFIG_AVS3_DEMUXER) += avs3dec.o rawdec.o
OBJS-$(CONFIG_BETHSOFTVID_DEMUXER) += bethsoftvid.o
OBJS-$(CONFIG_BFI_DEMUXER) += bfi.o
OBJS-$(CONFIG_BINK_DEMUXER) += bink.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 97fd06debb..2d768b8c88 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -82,6 +82,7 @@ extern AVInputFormat ff_avr_demuxer;
extern AVInputFormat ff_avs_demuxer;
extern AVInputFormat ff_avs2_demuxer;
extern AVOutputFormat ff_avs2_muxer;
+extern AVInputFormat ff_avs3_demuxer;
extern AVInputFormat ff_bethsoftvid_demuxer;
extern AVInputFormat ff_bfi_demuxer;
extern AVInputFormat ff_bintext_demuxer;
diff --git a/libavformat/avs3dec.c b/libavformat/avs3dec.c
new file mode 100644
index 0000000000..955114dc42
--- /dev/null
+++ b/libavformat/avs3dec.c
@@ -0,0 +1,75 @@
+/*
+ * RAW AVS3-P2/IEEE1857.10 video demuxer
+ * Copyright (c) 2020 Zhenyu Wang <wangzhe...@pkusz.edu.cn>
+ * Bingjie Han <ha...@pkusz.edu.cn>
+ * Huiwen Ren <hwr...@gmail.com>
+ *
+ * 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 "avformat.h"
+#include "rawdec.h"
+#include "libavcodec/internal.h"
+
+#define AVS3_SEQ_START_CODE 0x000001b0
+#define AVS3_PIC_I_START_CODE 0x000001b3
+#define AVS3_UNDEF_START_CODE 0x000001b4
+#define AVS3_PIC_PB_START_CODE 0x000001b6
+#define AVS3_VIDEO_EDIT_CODE 0x000001b7
+#define AVS3_PROFILE_JIZHUN 0x20
+#define AVS3_PROFILE_JIZHUN10 0x22
+
+static int avs3video_probe(const AVProbeData *p)
+{
+ uint32_t code= -1;
+ int pic=0, seq=0, slice_pos = 0;
+ const uint8_t *ptr = p->buf, *end = p->buf + p->buf_size;
+ int ret = 0;
+
+ while (ptr < end) {
+ ptr = avpriv_find_start_code(ptr, end, &code);
+ if ((code & 0xffffff00) == 0x100) {
+ if (code < AVS3_SEQ_START_CODE) {
+ /* slices have to be consecutive */
+ if (code < slice_pos)
+ return 0;
+ slice_pos = code;
+ } else {
+ slice_pos = 0;
+ }
+ if (code == AVS3_SEQ_START_CODE) {
+ seq++;
+ /* check for the only currently supported profile */
+ if (*ptr != AVS3_PROFILE_JIZHUN && *ptr !=
AVS3_PROFILE_JIZHUN10)
+ return 0;
+ } else if ((code == AVS3_PIC_I_START_CODE) ||
+ (code == AVS3_PIC_PB_START_CODE)) {
+ pic++;
+ } else if ((code == AVS3_UNDEF_START_CODE) ||
+ (code > AVS3_VIDEO_EDIT_CODE)) {
+ return 0;
+ }
+ }
+ }
+ if (seq && pic && av_match_ext(p->filename, "avs3")) {
+ ret = AVPROBE_SCORE_MAX;
+ }
+ return ret;
+}
+
+FF_DEF_RAWVIDEO_DEMUXER(avs3, "raw AVS3-P2/IEEE1857.10", avs3video_probe,
"avs3", AV_CODEC_ID_AVS3)
+
--
2.23.0.windows.1
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