WebMWriter.h@ 77110

Last change on this file since 77110 was 76760, checked in by vboxsync, 6 years ago
Main/Recording: thin out the excessive includes so that it doesn't hide missing includes in totally unrelated code, and adjust that code to do the right thing
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 17.1 KB

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1	/* $Id: WebMWriter.h 76760 2019-01-10 18:07:47Z vboxsync $ */
2	/** @file
3	* WebMWriter.h - WebM container handling.
4	*/
5
6	/*
7	* Copyright (C) 2013-2019 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	#ifndef MAIN_INCLUDED_WebMWriter_h
19	#define MAIN_INCLUDED_WebMWriter_h
20	#ifndef RT_WITHOUT_PRAGMA_ONCE
21	# pragma once
22	#endif
23
24	#include "EBMLWriter.h"
25
26	#include <queue>
27	#include <map>
28	#include <list>
29
30	#include <iprt/rand.h>
31
32	#ifdef VBOX_WITH_LIBVPX
33	# ifdef _MSC_VER
34	# pragma warning(push)
35	# pragma warning(disable: 4668) /* vpx_codec.h(64) : warning C4668: '__GNUC__' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' */
36	# include <vpx/vpx_encoder.h>
37	# pragma warning(pop)
38	# else
39	# include <vpx/vpx_encoder.h>
40	# endif
41	#endif /* VBOX_WITH_LIBVPX */
42
43	/** No flags specified. */
44	#define VBOX_WEBM_BLOCK_FLAG_NONE 0
45	/** Invisible block which can be skipped. */
46	#define VBOX_WEBM_BLOCK_FLAG_INVISIBLE 0x08
47	/** The block marks a key frame. */
48	#define VBOX_WEBM_BLOCK_FLAG_KEY_FRAME 0x80
49
50	/** The default timecode scale factor for WebM -- all timecodes in the segments are expressed in ms.
51	* This allows every cluster to have blocks with positive values up to 32.767 seconds. */
52	#define VBOX_WEBM_TIMECODESCALE_FACTOR_MS 1000000
53
54	/** Maximum time (in ms) a cluster can store. */
55	#define VBOX_WEBM_CLUSTER_MAX_LEN_MS INT16_MAX
56
57	/** Maximum time a block can store.
58	* With signed 16-bit timecodes and a default timecode scale of 1ms per unit this makes 65536ms. */
59	#define VBOX_WEBM_BLOCK_MAX_LEN_MS UINT16_MAX
60
61	#ifdef VBOX_WITH_LIBOPUS
62	# pragma pack(push)
63	# pragma pack(1)
64	/** Opus codec private data within the MKV (WEBM) container.
65	* Taken from: https://wiki.xiph.org/MatroskaOpus */
66	typedef struct WEBMOPUSPRIVDATA
67	{
68	WEBMOPUSPRIVDATA(uint32_t a_u32SampleRate, uint8_t a_u8Channels)
69	{
70	au64Head = RT_MAKE_U64_FROM_U8('O', 'p', 'u', 's', 'H', 'e', 'a', 'd');
71	u8Version = 1;
72	u8Channels = a_u8Channels;
73	u16PreSkip = 0;
74	u32SampleRate = a_u32SampleRate;
75	u16Gain = 0;
76	u8MappingFamily = 0;
77	}
78
79	uint64_t au64Head; /*< Defaults to "OpusHead". /
80	uint8_t u8Version; /*< Must be set to 1. /
81	uint8_t u8Channels;
82	uint16_t u16PreSkip;
83	/** Sample rate before encoding to Opus.
84	* Note: This rate has nothing to do with the playback rate later! */
85	uint32_t u32SampleRate;
86	uint16_t u16Gain;
87	/** Must stay 0 -- otherwise a mapping table must be appended
88	* right after this header. */
89	uint8_t u8MappingFamily;
90	} WEBMOPUSPRIVDATA, *PWEBMOPUSPRIVDATA;
91	AssertCompileSize(WEBMOPUSPRIVDATA, 19);
92	# pragma pack(pop)
93	#endif /* VBOX_WITH_LIBOPUS */
94
95
96	class WebMWriter : public EBMLWriter
97	{
98
99	public:
100
101	/** Defines an absolute WebM timecode (Block + Cluster). */
102	typedef uint64_t WebMTimecodeAbs;
103
104	/** Defines a relative WebM timecode (Block). */
105	typedef uint16_t WebMTimecodeRel;
106
107	/** Defines the WebM block flags data type. */
108	typedef uint8_t WebMBlockFlags;
109
110	/**
111	* Supported audio codecs.
112	*/
113	enum AudioCodec
114	{
115	/** No audio codec specified. */
116	AudioCodec_None = 0,
117	/** Opus. */
118	AudioCodec_Opus = 1
119	};
120
121	/**
122	* Supported video codecs.
123	*/
124	enum VideoCodec
125	{
126	/** No video codec specified. */
127	VideoCodec_None = 0,
128	/** VP8. */
129	VideoCodec_VP8 = 1
130	};
131
132	/**
133	* Track type enumeration.
134	*/
135	enum WebMTrackType
136	{
137	/** Unknown / invalid type. */
138	WebMTrackType_Invalid = 0,
139	/** Only writes audio. */
140	WebMTrackType_Audio = 1,
141	/** Only writes video. */
142	WebMTrackType_Video = 2
143	};
144
145	struct WebMTrack;
146
147	/**
148	* Structure for defining a WebM simple block.
149	*/
150	struct WebMSimpleBlock
151	{
152	WebMSimpleBlock(WebMTrack *a_pTrack,
153	WebMTimecodeAbs a_tcAbsPTSMs, const void *a_pvData, size_t a_cbData, WebMBlockFlags a_fFlags)
154	: pTrack(a_pTrack)
155	{
156	Data.tcAbsPTSMs = a_tcAbsPTSMs;
157	Data.cb = a_cbData;
158	Data.fFlags = a_fFlags;
159
160	if (Data.cb)
161	{
162	Data.pv = RTMemDup(a_pvData, a_cbData);
163	if (!Data.pv)
164	throw;
165	}
166	}
167
168	virtual ~WebMSimpleBlock()
169	{
170	if (Data.pv)
171	{
172	Assert(Data.cb);
173	RTMemFree(Data.pv);
174	}
175	}
176
177	WebMTrack *pTrack;
178
179	/** Actual simple block data. */
180	struct
181	{
182	WebMTimecodeAbs tcAbsPTSMs;
183	WebMTimecodeRel tcRelToClusterMs;
184	void *pv;
185	size_t cb;
186	WebMBlockFlags fFlags;
187	} Data;
188	};
189
190	/** A simple block queue.*/
191	typedef std::queue<WebMSimpleBlock *> WebMSimpleBlockQueue;
192
193	/** Structure for queuing all simple blocks bound to a single timecode.
194	* This can happen if multiple tracks are being involved. */
195	struct WebMTimecodeBlocks
196	{
197	WebMTimecodeBlocks(void)
198	: fClusterNeeded(false)
199	, fClusterStarted(false) { }
200
201	/** The actual block queue for this timecode. */
202	WebMSimpleBlockQueue Queue;
203	/** Whether a new cluster is needed for this timecode or not. */
204	bool fClusterNeeded;
205	/** Whether a new cluster already has been started for this timecode or not. */
206	bool fClusterStarted;
207
208	/**
209	* Enqueues a simple block into the internal queue.
210	*
211	* @param a_pBlock Block to enqueue and take ownership of.
212	*/
213	void Enqueue(WebMSimpleBlock *a_pBlock)
214	{
215	Queue.push(a_pBlock);
216
217	if (a_pBlock->Data.fFlags & VBOX_WEBM_BLOCK_FLAG_KEY_FRAME)
218	fClusterNeeded = true;
219	}
220	};
221
222	/** A block map containing all currently queued blocks.
223	* The key specifies a unique timecode, whereas the value
224	* is a queue of blocks which all correlate to the key (timecode). */
225	typedef std::map<WebMTimecodeAbs, WebMTimecodeBlocks> WebMBlockMap;
226
227	/**
228	* Structure for defining a WebM (encoding) queue.
229	*/
230	struct WebMQueue
231	{
232	WebMQueue(void)
233	: tcAbsLastBlockWrittenMs(0)
234	, tsLastProcessedMs(0) { }
235
236	/** Blocks as FIFO (queue). */
237	WebMBlockMap Map;
238	/** Absolute timecode (in ms) of last written block to queue. */
239	WebMTimecodeAbs tcAbsLastBlockWrittenMs;
240	/** Time stamp (in ms) of when the queue was processed last. */
241	uint64_t tsLastProcessedMs;
242	};
243
244	/**
245	* Structure for keeping a WebM track entry.
246	*/
247	struct WebMTrack
248	{
249	WebMTrack(WebMTrackType a_enmType, uint8_t a_uTrack, uint64_t a_offID)
250	: enmType(a_enmType)
251	, uTrack(a_uTrack)
252	, offUUID(a_offID)
253	, cTotalBlocks(0)
254	, tcAbsLastWrittenMs(0)
255	{
256	uUUID = RTRandU32();
257	}
258
259	/** The type of this track. */
260	WebMTrackType enmType;
261	/** Track parameters. */
262	union
263	{
264	struct
265	{
266	/** Sample rate of input data. */
267	uint32_t uHz;
268	/** Duration of the frame in samples (per channel).
269	* Valid frame size are:
270	*
271	* ms Frame size
272	* 2.5 120
273	* 5 240
274	* 10 480
275	* 20 (Default) 960
276	* 40 1920
277	* 60 2880
278	*/
279	uint16_t framesPerBlock;
280	/** How many milliseconds (ms) one written (simple) block represents. */
281	uint16_t msPerBlock;
282	} Audio;
283	};
284	/** This track's track number. Also used as key in track map. */
285	uint8_t uTrack;
286	/** The track's "UUID".
287	* Needed in case this track gets mux'ed with tracks from other files. Not really unique though. */
288	uint32_t uUUID;
289	/** Absolute offset in file of track UUID.
290	* Needed to write the hash sum within the footer. */
291	uint64_t offUUID;
292	/** Total number of blocks. */
293	uint64_t cTotalBlocks;
294	/** Absoute timecode (in ms) of last write. */
295	WebMTimecodeAbs tcAbsLastWrittenMs;
296	};
297
298	/**
299	* Structure for a single cue point track position entry.
300	*/
301	struct WebMCueTrackPosEntry
302	{
303	WebMCueTrackPosEntry(uint64_t a_offCluster)
304	: offCluster(a_offCluster) { }
305
306	/** Offset (in bytes) of the related cluster containing the given position. */
307	uint64_t offCluster;
308	};
309
310	/** Map for keeping track position entries for a single cue point.
311	* The key is the track number (not UUID!). */
312	typedef std::map<uint8_t, WebMCueTrackPosEntry *> WebMCueTrackPosMap;
313
314	/**
315	* Structure for keeping a cue point.
316	*/
317	struct WebMCuePoint
318	{
319	WebMCuePoint(WebMTimecodeAbs a_tcAbs)
320	: tcAbs(a_tcAbs) { }
321
322	virtual ~WebMCuePoint()
323	{
324	Clear();
325	}
326
327	void Clear(void)
328	{
329	WebMCueTrackPosMap::iterator itTrackPos = Pos.begin();
330	while (itTrackPos != Pos.end())
331	{
332	WebMCueTrackPosEntry *pTrackPos = itTrackPos->second;
333	AssertPtr(pTrackPos);
334	delete pTrackPos;
335
336	Pos.erase(itTrackPos);
337	itTrackPos = Pos.begin();
338	}
339
340	Assert(Pos.empty());
341	}
342
343	/** Map containing all track positions for this specific cue point. */
344	WebMCueTrackPosMap Pos;
345	/** Absolute time code according to the segment time base. */
346	WebMTimecodeAbs tcAbs;
347	};
348
349	/** List of cue points. */
350	typedef std::list<WebMCuePoint *> WebMCuePointList;
351
352	/**
353	* Structure for keeping a WebM cluster entry.
354	*/
355	struct WebMCluster
356	{
357	WebMCluster(void)
358	: uID(0)
359	, offStart(0)
360	, fOpen(false)
361	, tcAbsStartMs(0)
362	, cBlocks(0) { }
363
364	/** This cluster's ID. */
365	uint64_t uID;
366	/** Absolute offset (in bytes) of this cluster.
367	* Needed for seeking info table. */
368	uint64_t offStart;
369	/** Whether this cluster element is opened currently. */
370	bool fOpen;
371	/** Absolute timecode (in ms) when this cluster starts. */
372	WebMTimecodeAbs tcAbsStartMs;
373	/** Absolute timecode (in ms) of when last written to this cluster. */
374	WebMTimecodeAbs tcAbsLastWrittenMs;
375	/** Number of (simple) blocks in this cluster. */
376	uint64_t cBlocks;
377	};
378
379	/**
380	* Structure for keeping a WebM segment entry.
381	*
382	* Current we're only using one segment.
383	*/
384	struct WebMSegment
385	{
386	WebMSegment(void)
387	: tcAbsStartMs(0)
388	, tcAbsLastWrittenMs(0)
389	, offStart(0)
390	, offInfo(0)
391	, offSeekInfo(0)
392	, offTracks(0)
393	, offCues(0)
394	, cClusters(0)
395	{
396	uTimecodeScaleFactor = VBOX_WEBM_TIMECODESCALE_FACTOR_MS;
397
398	LogFunc(("Default timecode scale is: %RU64ns\n", uTimecodeScaleFactor));
399	}
400
401	virtual ~WebMSegment()
402	{
403	uninit();
404	}
405
406	/**
407	* Initializes a segment.
408	*
409	* @returns IPRT status code.
410	*/
411	int init(void)
412	{
413	return RTCritSectInit(&CritSect);
414	}
415
416	/**
417	* Uninitializes a segment.
418	*/
419	void uninit(void)
420	{
421	clear();
422
423	RTCritSectDelete(&CritSect);
424	}
425
426	/**
427	* Clear the segment's data by removing (and freeing) all data.
428	*/
429	void clear(void)
430	{
431	WebMCuePointList::iterator itCuePoint = lstCuePoints.begin();
432	while (itCuePoint != lstCuePoints.end())
433	{
434	WebMCuePoint pCuePoint = (itCuePoint);
435	AssertPtr(pCuePoint);
436	delete pCuePoint;
437
438	lstCuePoints.erase(itCuePoint);
439	itCuePoint = lstCuePoints.begin();
440	}
441
442	Assert(lstCuePoints.empty());
443	}
444
445	/** Critical section for serializing access to this segment. */
446	RTCRITSECT CritSect;
447
448	/** The timecode scale factor of this segment. */
449	uint64_t uTimecodeScaleFactor;
450
451	/** Absolute timecode (in ms) when starting this segment. */
452	WebMTimecodeAbs tcAbsStartMs;
453	/** Absolute timecode (in ms) of last write. */
454	WebMTimecodeAbs tcAbsLastWrittenMs;
455
456	/** Absolute offset (in bytes) of CurSeg. */
457	uint64_t offStart;
458	/** Absolute offset (in bytes) of general info. */
459	uint64_t offInfo;
460	/** Absolute offset (in bytes) of seeking info. */
461	uint64_t offSeekInfo;
462	/** Absolute offset (in bytes) of tracks. */
463	uint64_t offTracks;
464	/** Absolute offset (in bytes) of cues table. */
465	uint64_t offCues;
466	/** List of cue points. Needed for seeking table. */
467	WebMCuePointList lstCuePoints;
468
469	/** Total number of clusters. */
470	uint64_t cClusters;
471
472	/** Map of tracks.
473	* The key marks the track number (not the UUID!). */
474	std::map <uint8_t, WebMTrack *> mapTracks;
475
476	/** Current cluster which is being handled.
477	*
478	* Note that we don't need (and shouldn't need, as this can be a lot of data!) a
479	* list of all clusters. */
480	WebMCluster CurCluster;
481
482	WebMQueue queueBlocks;
483
484	} CurSeg;
485
486	/** Audio codec to use. */
487	WebMWriter::AudioCodec m_enmAudioCodec;
488	/** Video codec to use. */
489	WebMWriter::VideoCodec m_enmVideoCodec;
490
491	/** Whether we're currently in the tracks section. */
492	bool m_fInTracksSection;
493
494	/** Size of timecodes (in bytes). */
495	size_t m_cbTimecode;
496	/** Maximum value a timecode can have. */
497	uint32_t m_uTimecodeMax;
498
499	#ifdef VBOX_WITH_LIBVPX
500	/**
501	* Block data for VP8-encoded video data.
502	*/
503	struct BlockData_VP8
504	{
505	const vpx_codec_enc_cfg_t *pCfg;
506	const vpx_codec_cx_pkt_t *pPkt;
507	};
508	#endif /* VBOX_WITH_LIBVPX */
509
510	#ifdef VBOX_WITH_LIBOPUS
511	/**
512	* Block data for Opus-encoded audio data.
513	*/
514	struct BlockData_Opus
515	{
516	/** Pointer to encoded Opus audio data. */
517	const void *pvData;
518	/** Size (in bytes) of encoded Opus audio data. */
519	size_t cbData;
520	/** PTS (in ms) of encoded Opus audio data. */
521	uint64_t uPTSMs;
522	};
523	#endif /* VBOX_WITH_LIBOPUS */
524
525	public:
526
527	WebMWriter();
528
529	virtual ~WebMWriter();
530
531	public:
532
533	int OpenEx(const char *a_pszFilename, PRTFILE a_phFile,
534	WebMWriter::AudioCodec a_enmAudioCodec, WebMWriter::VideoCodec a_enmVideoCodec);
535
536	int Open(const char *a_pszFilename, uint64_t a_fOpen,
537	WebMWriter::AudioCodec a_enmAudioCodec, WebMWriter::VideoCodec a_enmVideoCodec);
538
539	int Close(void);
540
541	int AddAudioTrack(uint16_t uHz, uint8_t cChannels, uint8_t cBits, uint8_t *puTrack);
542
543	int AddVideoTrack(uint16_t uWidth, uint16_t uHeight, uint32_t uFPS, uint8_t *puTrack);
544
545	int WriteBlock(uint8_t uTrack, const void *pvData, size_t cbData);
546
547	const com::Utf8Str& GetFileName(void);
548
549	uint64_t GetFileSize(void);
550
551	uint64_t GetAvailableSpace(void);
552
553	protected:
554
555	int init(void);
556
557	void destroy(void);
558
559	int writeHeader(void);
560
561	void writeSeekHeader(void);
562
563	int writeFooter(void);
564
565	int writeSimpleBlockEBML(WebMTrack a_pTrack, WebMSimpleBlock a_pBlock);
566
567	int writeSimpleBlockQueued(WebMTrack a_pTrack, WebMSimpleBlock a_pBlock);
568
569	#ifdef VBOX_WITH_LIBVPX
570	int writeSimpleBlockVP8(WebMTrack a_pTrack, const vpx_codec_enc_cfg_t a_pCfg, const vpx_codec_cx_pkt_t *a_pPkt);
571	#endif
572
573	#ifdef VBOX_WITH_LIBOPUS
574	int writeSimpleBlockOpus(WebMTrack a_pTrack, const void pvData, size_t cbData, WebMTimecodeAbs tcAbsPTSMs);
575	#endif
576
577	int processQueue(WebMQueue *pQueue, bool fForce);
578
579	protected:
580
581	typedef std::map <uint8_t, WebMTrack *> WebMTracks;
582	};
583
584	#endif /* !MAIN_INCLUDED_WebMWriter_h */

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source: vbox/trunk/src/VBox/Main/include/WebMWriter.h@ 77110

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