WebMWriter.h@ 70030

Last change on this file since 70030 was 69689, checked in by vboxsync, 7 years ago
Main/WebMWriter: SVN props.
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1	/* $Id: WebMWriter.h 69689 2017-11-14 14:50:37Z vboxsync $ */
2	/** @file
3	* WebMWriter.h - WebM container handling.
4	*/
5
6	/*
7	* Copyright (C) 2013-2017 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 ____WEBMWRITER
19	#define ____WEBMWRITER
20
21	#include "EBMLWriter.h"
22
23	#ifdef VBOX_WITH_LIBVPX
24	# ifdef _MSC_VER
25	# pragma warning(push)
26	# pragma warning(disable: 4668) /* vpx_codec.h(64) : warning C4668: '__GNUC__' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' */
27	# include <vpx/vpx_encoder.h>
28	# pragma warning(pop)
29	# else
30	# include <vpx/vpx_encoder.h>
31	# endif
32	#endif /* VBOX_WITH_LIBVPX */
33
34	/** No flags specified. */
35	#define VBOX_WEBM_BLOCK_FLAG_NONE 0
36	/** Invisible block which can be skipped. */
37	#define VBOX_WEBM_BLOCK_FLAG_INVISIBLE 0x08
38	/** The block marks a key frame. */
39	#define VBOX_WEBM_BLOCK_FLAG_KEY_FRAME 0x80
40
41	/** The default timecode scale factor for WebM -- all timecodes in the segments are expressed in ms.
42	* This allows every cluster to have blocks with positive values up to 32.767 seconds. */
43	#define VBOX_WEBM_TIMECODESCALE_FACTOR_MS 1000000
44
45	/** Maximum time (in ms) a cluster can store. */
46	#define VBOX_WEBM_CLUSTER_MAX_LEN_MS INT16_MAX
47
48	/** Maximum time a block can store.
49	* With signed 16-bit timecodes and a default timecode scale of 1ms per unit this makes 65536ms. */
50	#define VBOX_WEBM_BLOCK_MAX_LEN_MS UINT16_MAX
51
52	#ifdef VBOX_WITH_LIBOPUS
53	# pragma pack(push)
54	# pragma pack(1)
55	/** Opus codec private data within the MKV (WEBM) container.
56	* Taken from: https://wiki.xiph.org/MatroskaOpus */
57	typedef struct WEBMOPUSPRIVDATA
58	{
59	WEBMOPUSPRIVDATA(uint32_t a_u32SampleRate, uint8_t a_u8Channels)
60	{
61	au64Head = RT_MAKE_U64_FROM_U8('O', 'p', 'u', 's', 'H', 'e', 'a', 'd');
62	u8Version = 1;
63	u8Channels = a_u8Channels;
64	u16PreSkip = 0;
65	u32SampleRate = a_u32SampleRate;
66	u16Gain = 0;
67	u8MappingFamily = 0;
68	}
69
70	uint64_t au64Head; /*< Defaults to "OpusHead". /
71	uint8_t u8Version; /*< Must be set to 1. /
72	uint8_t u8Channels;
73	uint16_t u16PreSkip;
74	/** Sample rate before encoding to Opus.
75	* Note: This rate has nothing to do with the playback rate later! */
76	uint32_t u32SampleRate;
77	uint16_t u16Gain;
78	/** Must stay 0 -- otherwise a mapping table must be appended
79	* right after this header. */
80	uint8_t u8MappingFamily;
81	} WEBMOPUSPRIVDATA, *PWEBMOPUSPRIVDATA;
82	AssertCompileSize(WEBMOPUSPRIVDATA, 19);
83	# pragma pack(pop)
84	#endif /* VBOX_WITH_LIBOPUS */
85
86	using namespace com;
87
88	class WebMWriter : public EBMLWriter
89	{
90
91	public:
92
93	/** Defines a WebM timecode. */
94	typedef uint16_t WebMTimecode;
95
96	/** Defines the WebM block flags data type. */
97	typedef uint8_t WebMBlockFlags;
98
99	/**
100	* Supported audio codecs.
101	*/
102	enum AudioCodec
103	{
104	/** No audio codec specified. */
105	AudioCodec_None = 0,
106	/** Opus. */
107	AudioCodec_Opus = 1
108	};
109
110	/**
111	* Supported video codecs.
112	*/
113	enum VideoCodec
114	{
115	/** No video codec specified. */
116	VideoCodec_None = 0,
117	/** VP8. */
118	VideoCodec_VP8 = 1
119	};
120
121	/**
122	* Track type enumeration.
123	*/
124	enum WebMTrackType
125	{
126	/** Unknown / invalid type. */
127	WebMTrackType_Invalid = 0,
128	/** Only writes audio. */
129	WebMTrackType_Audio = 1,
130	/** Only writes video. */
131	WebMTrackType_Video = 2
132	};
133
134	struct WebMTrack;
135
136	/**
137	* Structure for defining a WebM simple block.
138	*/
139	struct WebMSimpleBlock
140	{
141	WebMSimpleBlock(WebMTrack *a_pTrack,
142	WebMTimecode a_tcPTSMs, const void *a_pvData, size_t a_cbData, WebMBlockFlags a_fFlags)
143	: pTrack(a_pTrack)
144	{
145	Data.tcPTSMs = a_tcPTSMs;
146	Data.cb = a_cbData;
147	Data.fFlags = a_fFlags;
148
149	if (Data.cb)
150	{
151	Data.pv = RTMemDup(a_pvData, a_cbData);
152	if (!Data.pv)
153	throw;
154	}
155	}
156
157	virtual ~WebMSimpleBlock()
158	{
159	if (Data.pv)
160	{
161	Assert(Data.cb);
162	RTMemFree(Data.pv);
163	}
164	}
165
166	WebMTrack *pTrack;
167
168	/** Actual simple block data. */
169	struct
170	{
171	WebMTimecode tcPTSMs;
172	WebMTimecode tcRelToClusterMs;
173	void *pv;
174	size_t cb;
175	WebMBlockFlags fFlags;
176	} Data;
177	};
178
179	/** A simple block queue.*/
180	typedef std::queue<WebMSimpleBlock *> WebMSimpleBlockQueue;
181
182	/** Structure for queuing all simple blocks bound to a single timecode.
183	* This can happen if multiple tracks are being involved. */
184	struct WebMTimecodeBlocks
185	{
186	WebMTimecodeBlocks(void)
187	: fClusterNeeded(false)
188	, fClusterStarted(false) { }
189
190	/** The actual block queue for this timecode. */
191	WebMSimpleBlockQueue Queue;
192	/** Whether a new cluster is needed for this timecode or not. */
193	bool fClusterNeeded;
194	/** Whether a new cluster already has been started for this timecode or not. */
195	bool fClusterStarted;
196
197	/**
198	* Enqueues a simple block into the internal queue.
199	*
200	* @param a_pBlock Block to enqueue and take ownership of.
201	*/
202	void Enqueue(WebMSimpleBlock *a_pBlock)
203	{
204	Queue.push(a_pBlock);
205
206	if (a_pBlock->Data.fFlags & VBOX_WEBM_BLOCK_FLAG_KEY_FRAME)
207	fClusterNeeded = true;
208	}
209	};
210
211	/** A block map containing all currently queued blocks.
212	* The key specifies a unique timecode, whereas the value
213	* is a queue of blocks which all correlate to the key (timecode). */
214	typedef std::map<WebMTimecode, WebMTimecodeBlocks> WebMBlockMap;
215
216	/**
217	* Structure for defining a WebM (encoding) queue.
218	*/
219	struct WebMQueue
220	{
221	WebMQueue(void)
222	: tcLastBlockWrittenMs(0)
223	, tslastProcessedMs(0) { }
224
225	/** Blocks as FIFO (queue). */
226	WebMBlockMap Map;
227	/** Timecode (in ms) of last written block to queue. */
228	WebMTimecode tcLastBlockWrittenMs;
229	/** Time stamp (in ms) of when the queue was processed last. */
230	uint64_t tslastProcessedMs;
231	};
232
233	/**
234	* Structure for keeping a WebM track entry.
235	*/
236	struct WebMTrack
237	{
238	WebMTrack(WebMTrackType a_enmType, uint8_t a_uTrack, uint64_t a_offID)
239	: enmType(a_enmType)
240	, uTrack(a_uTrack)
241	, offUUID(a_offID)
242	, cTotalBlocks(0)
243	, tcLastWrittenMs(0)
244	{
245	uUUID = RTRandU32();
246	}
247
248	/** The type of this track. */
249	WebMTrackType enmType;
250	/** Track parameters. */
251	union
252	{
253	struct
254	{
255	/** Sample rate of input data. */
256	uint32_t uHz;
257	/** Duration of the frame in samples (per channel).
258	* Valid frame size are:
259	*
260	* ms Frame size
261	* 2.5 120
262	* 5 240
263	* 10 480
264	* 20 (Default) 960
265	* 40 1920
266	* 60 2880
267	*/
268	uint16_t framesPerBlock;
269	/** How many milliseconds (ms) one written (simple) block represents. */
270	uint16_t msPerBlock;
271	} Audio;
272	};
273	/** This track's track number. Also used as key in track map. */
274	uint8_t uTrack;
275	/** The track's "UUID".
276	* Needed in case this track gets mux'ed with tracks from other files. Not really unique though. */
277	uint32_t uUUID;
278	/** Absolute offset in file of track UUID.
279	* Needed to write the hash sum within the footer. */
280	uint64_t offUUID;
281	/** Total number of blocks. */
282	uint64_t cTotalBlocks;
283	/** Timecode (in ms) of last write. */
284	WebMTimecode tcLastWrittenMs;
285	};
286
287	/**
288	* Structure for keeping a cue point.
289	*/
290	struct WebMCuePoint
291	{
292	WebMCuePoint(WebMTrack *a_pTrack, uint64_t a_offCluster, WebMTimecode a_tcAbs)
293	: pTrack(a_pTrack)
294	, offCluster(a_offCluster), tcAbs(a_tcAbs) { }
295
296	/** Associated track. */
297	WebMTrack *pTrack;
298	/** Offset (in bytes) of the related cluster containing the given position. */
299	uint64_t offCluster;
300	/** Time code (absolute) of this cue point. */
301	WebMTimecode tcAbs;
302	};
303
304	/**
305	* Structure for keeping a WebM cluster entry.
306	*/
307	struct WebMCluster
308	{
309	WebMCluster(void)
310	: uID(0)
311	, offStart(0)
312	, fOpen(false)
313	, tcStartMs(0)
314	, cBlocks(0) { }
315
316	/** This cluster's ID. */
317	uint64_t uID;
318	/** Absolute offset (in bytes) of this cluster.
319	* Needed for seeking info table. */
320	uint64_t offStart;
321	/** Whether this cluster element is opened currently. */
322	bool fOpen;
323	/** Timecode (in ms) when this cluster starts. */
324	WebMTimecode tcStartMs;
325	/** Number of (simple) blocks in this cluster. */
326	uint64_t cBlocks;
327	};
328
329	/**
330	* Structure for keeping a WebM segment entry.
331	*
332	* Current we're only using one segment.
333	*/
334	struct WebMSegment
335	{
336	WebMSegment(void)
337	: tcStartMs(0)
338	, tcLastWrittenMs(0)
339	, offStart(0)
340	, offInfo(0)
341	, offSeekInfo(0)
342	, offTracks(0)
343	, offCues(0)
344	{
345	uTimecodeScaleFactor = VBOX_WEBM_TIMECODESCALE_FACTOR_MS;
346
347	LogFunc(("Default timecode scale is: %RU64ns\n", uTimecodeScaleFactor));
348	}
349
350	int init(void)
351	{
352	return RTCritSectInit(&CritSect);
353	}
354
355	void destroy(void)
356	{
357	RTCritSectDelete(&CritSect);
358	}
359
360	/** Critical section for serializing access to this segment. */
361	RTCRITSECT CritSect;
362
363	/** The timecode scale factor of this segment. */
364	uint64_t uTimecodeScaleFactor;
365
366	/** Timecode (in ms) when starting this segment. */
367	WebMTimecode tcStartMs;
368	/** Timecode (in ms) of last write. */
369	WebMTimecode tcLastWrittenMs;
370
371	/** Absolute offset (in bytes) of CurSeg. */
372	uint64_t offStart;
373	/** Absolute offset (in bytes) of general info. */
374	uint64_t offInfo;
375	/** Absolute offset (in bytes) of seeking info. */
376	uint64_t offSeekInfo;
377	/** Absolute offset (in bytes) of tracks. */
378	uint64_t offTracks;
379	/** Absolute offset (in bytes) of cues table. */
380	uint64_t offCues;
381	/** List of cue points. Needed for seeking table. */
382	std::list<WebMCuePoint> lstCues;
383
384	/** Total number of clusters. */
385	uint64_t cClusters;
386
387	/** Map of tracks.
388	* The key marks the track number (not the UUID!). */
389	std::map <uint8_t, WebMTrack *> mapTracks;
390
391	/** Current cluster which is being handled.
392	*
393	* Note that we don't need (and shouldn't need, as this can be a lot of data!) a
394	* list of all clusters. */
395	WebMCluster CurCluster;
396
397	WebMQueue queueBlocks;
398
399	} CurSeg;
400
401	/** Audio codec to use. */
402	WebMWriter::AudioCodec m_enmAudioCodec;
403	/** Video codec to use. */
404	WebMWriter::VideoCodec m_enmVideoCodec;
405
406	/** Whether we're currently in the tracks section. */
407	bool m_fInTracksSection;
408
409	/** Size of timecodes in bytes. */
410	size_t m_cbTimecode;
411	/** Maximum value a timecode can have. */
412	uint32_t m_uTimecodeMax;
413
414	#ifdef VBOX_WITH_LIBVPX
415	/**
416	* Block data for VP8-encoded video data.
417	*/
418	struct BlockData_VP8
419	{
420	const vpx_codec_enc_cfg_t *pCfg;
421	const vpx_codec_cx_pkt_t *pPkt;
422	};
423	#endif /* VBOX_WITH_LIBVPX */
424
425	#ifdef VBOX_WITH_LIBOPUS
426	/**
427	* Block data for Opus-encoded audio data.
428	*/
429	struct BlockData_Opus
430	{
431	/** Pointer to encoded Opus audio data. */
432	const void *pvData;
433	/** Size (in bytes) of encoded Opus audio data. */
434	size_t cbData;
435	/** PTS (in ms) of encoded Opus audio data. */
436	uint64_t uPTSMs;
437	};
438	#endif /* VBOX_WITH_LIBOPUS */
439
440	public:
441
442	WebMWriter();
443
444	virtual ~WebMWriter();
445
446	public:
447
448	int OpenEx(const char *a_pszFilename, PRTFILE a_phFile,
449	WebMWriter::AudioCodec a_enmAudioCodec, WebMWriter::VideoCodec a_enmVideoCodec);
450
451	int Open(const char *a_pszFilename, uint64_t a_fOpen,
452	WebMWriter::AudioCodec a_enmAudioCodec, WebMWriter::VideoCodec a_enmVideoCodec);
453
454	int Close(void);
455
456	int AddAudioTrack(uint16_t uHz, uint8_t cChannels, uint8_t cBits, uint8_t *puTrack);
457
458	int AddVideoTrack(uint16_t uWidth, uint16_t uHeight, double dbFPS, uint8_t *puTrack);
459
460	int WriteBlock(uint8_t uTrack, const void *pvData, size_t cbData);
461
462	const Utf8Str& GetFileName(void);
463
464	uint64_t GetFileSize(void);
465
466	uint64_t GetAvailableSpace(void);
467
468	protected:
469
470	int init(void);
471
472	void destroy(void);
473
474	int writeHeader(void);
475
476	void writeSegSeekInfo(void);
477
478	int writeFooter(void);
479
480	int writeSimpleBlockEBML(WebMTrack a_pTrack, WebMSimpleBlock a_pBlock);
481
482	int writeSimpleBlockQueued(WebMTrack a_pTrack, WebMSimpleBlock a_pBlock);
483
484	#ifdef VBOX_WITH_LIBVPX
485	int writeSimpleBlockVP8(WebMTrack a_pTrack, const vpx_codec_enc_cfg_t a_pCfg, const vpx_codec_cx_pkt_t *a_pPkt);
486	#endif
487
488	#ifdef VBOX_WITH_LIBOPUS
489	int writeSimpleBlockOpus(WebMTrack a_pTrack, const void pvData, size_t cbData, WebMTimecode uPTSMs);
490	#endif
491
492	int processQueues(WebMQueue *pQueue, bool fForce);
493
494	protected:
495
496	typedef std::map <uint8_t, WebMTrack *> WebMTracks;
497	};
498
499	#endif /* !____WEBMWRITER */

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source: vbox/trunk/src/VBox/Main/src-client/WebMWriter.h@ 70030

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