From 8992cb1d0d07edc33d274f6d7924ecdf6f83d994 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Thu, 5 Sep 2013 17:57:22 +0100
Subject: making act segmenter

---
 ffmpeg/libavformat/nut.h | 133 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 ffmpeg/libavformat/nut.h

(limited to 'ffmpeg/libavformat/nut.h')

diff --git a/ffmpeg/libavformat/nut.h b/ffmpeg/libavformat/nut.h
new file mode 100644
index 0000000..ab31c27
--- /dev/null
+++ b/ffmpeg/libavformat/nut.h
@@ -0,0 +1,133 @@
+/*
+ * "NUT" Container Format (de)muxer
+ * Copyright (c) 2006 Michael Niedermayer
+ *
+ * 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
+ */
+
+#ifndef AVFORMAT_NUT_H
+#define AVFORMAT_NUT_H
+
+//#include <limits.h>
+//#include "libavutil/adler32.h"
+//#include "libavcodec/mpegaudio.h"
+#include "avformat.h"
+#include "internal.h"
+#include "metadata.h"
+
+#define      MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48))
+#define    STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48))
+#define SYNCPOINT_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48))
+#define     INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48))
+#define      INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48))
+
+#define ID_STRING "nut/multimedia container\0"
+
+#define MAX_DISTANCE (1024*32-1)
+
+typedef enum{
+    FLAG_KEY        =   1, ///<if set, frame is keyframe
+    FLAG_EOR        =   2, ///<if set, stream has no relevance on presentation. (EOR)
+    FLAG_CODED_PTS  =   8, ///<if set, coded_pts is in the frame header
+    FLAG_STREAM_ID  =  16, ///<if set, stream_id is coded in the frame header
+    FLAG_SIZE_MSB   =  32, ///<if set, data_size_msb is at frame header, otherwise data_size_msb is 0
+    FLAG_CHECKSUM   =  64, ///<if set, the frame header contains a checksum
+    FLAG_RESERVED   = 128, ///<if set, reserved_count is coded in the frame header
+    FLAG_HEADER_IDX =1024, ///<If set, header_idx is coded in the frame header.
+    FLAG_MATCH_TIME =2048, ///<If set, match_time_delta is coded in the frame header
+    FLAG_CODED      =4096, ///<if set, coded_flags are stored in the frame header
+    FLAG_INVALID    =8192, ///<if set, frame_code is invalid
+} Flag;
+
+typedef struct Syncpoint {
+    uint64_t pos;
+    uint64_t back_ptr;
+//    uint64_t global_key_pts;
+    int64_t ts;
+} Syncpoint;
+
+typedef struct FrameCode {
+    uint16_t flags;
+    uint8_t  stream_id;
+    uint16_t size_mul;
+    uint16_t size_lsb;
+    int16_t  pts_delta;
+    uint8_t  reserved_count;
+    uint8_t  header_idx;
+} FrameCode;
+
+typedef struct StreamContext {
+    int last_flags;
+    int skip_until_key_frame;
+    int64_t last_pts;
+    int time_base_id;
+    AVRational *time_base;
+    int msb_pts_shift;
+    int max_pts_distance;
+    int decode_delay; //FIXME duplicate of has_b_frames
+    int64_t *keyframe_pts;
+} StreamContext;
+
+typedef struct ChapterContext {
+    AVRational *time_base;
+} ChapterContext;
+
+typedef struct NUTContext {
+    AVFormatContext *avf;
+//    int written_packet_size;
+//    int64_t packet_start;
+    FrameCode frame_code[256];
+    uint8_t header_len[128];
+    const uint8_t *header[128];
+    uint64_t next_startcode;     ///< stores the next startcode if it has already been parsed but the stream is not seekable
+    StreamContext *stream;
+    ChapterContext *chapter;
+    unsigned int max_distance;
+    unsigned int time_base_count;
+    int64_t last_syncpoint_pos;
+    int header_count;
+    AVRational *time_base;
+    struct AVTreeNode *syncpoints;
+    int sp_count;
+    int64_t max_pts;
+    AVRational *max_pts_tb;
+} NUTContext;
+
+extern const AVCodecTag ff_nut_subtitle_tags[];
+extern const AVCodecTag ff_nut_video_tags[];
+extern const AVCodecTag ff_nut_audio_tags[];
+extern const AVCodecTag ff_nut_data_tags[];
+
+extern const AVCodecTag * const ff_nut_codec_tags[];
+
+typedef struct Dispositions {
+    char str[9];
+    int flag;
+} Dispositions;
+
+void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
+int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
+int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b);
+int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b);
+void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
+void ff_nut_free_sp(NUTContext *nut);
+
+extern const Dispositions ff_nut_dispositions[];
+
+extern const AVMetadataConv ff_nut_metadata_conv[];
+
+#endif /* AVFORMAT_NUT_H */
-- 
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