2 Copyright (C) 2016-2018 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
25 #include "dcpomatic_log.h"
27 #include "compose.hpp"
28 #include "exceptions.h"
29 #include "cpu_player_video_preparer.h"
30 #include "fastvideo_player_video_preparer.h"
31 #include <boost/weak_ptr.hpp>
32 #include <boost/shared_ptr.hpp>
38 using boost::weak_ptr;
39 using boost::shared_ptr;
41 using boost::optional;
42 using boost::function;
43 using namespace dcpomatic;
44 #if BOOST_VERSION >= 106100
45 using namespace boost::placeholders;
48 /** Minimum video readahead in frames */
49 #define MINIMUM_VIDEO_READAHEAD 64
50 /** Maximum video readahead in frames; should never be exceeded (by much) unless there are bugs in Player */
51 #define MAXIMUM_VIDEO_READAHEAD 128
52 /** Minimum audio readahead in frames */
53 #define MINIMUM_AUDIO_READAHEAD (48000 * MINIMUM_VIDEO_READAHEAD / 24)
54 /** Maximum audio readahead in frames; should never be exceeded (by much) unless there are bugs in Player */
55 #define MAXIMUM_AUDIO_READAHEAD (48000 * MAXIMUM_VIDEO_READAHEAD / 24)
57 /** @param pixel_format Pixel format functor that will be used when calling ::image on PlayerVideos coming out of this
58 * butler. This will be used (where possible) to prepare the PlayerVideos so that calling image() on them is quick.
59 * @param aligned Same as above for the `aligned' flag.
60 * @param fast Same as above for the `fast' flag.
63 shared_ptr<Player> player,
64 AudioMapping audio_mapping,
66 function<AVPixelFormat (AVPixelFormat)> pixel_format,
71 , _pending_seek_accurate (false)
75 , _stop_thread (false)
76 , _audio_mapping (audio_mapping)
77 , _audio_channels (audio_channels)
78 , _disable_audio (false)
79 , _pixel_format (pixel_format)
83 _preparer.reset (new FastvideoPlayerVideoPreparer(pixel_format, aligned, fast));
85 _player_video_connection = _player->Video.connect (bind (&Butler::video, this, _1, _2));
86 _player_audio_connection = _player->Audio.connect (bind (&Butler::audio, this, _1, _2, _3));
87 _player_text_connection = _player->Text.connect (bind (&Butler::text, this, _1, _2, _3, _4));
88 /* The butler must hear about things first, otherwise it might not sort out suspensions in time for
89 get_video() to be called in response to this signal.
91 _player_change_connection = _player->Change.connect (bind (&Butler::player_change, this, _1), boost::signals2::at_front);
92 _thread = boost::thread (bind(&Butler::thread, this));
93 #ifdef DCPOMATIC_LINUX
94 pthread_setname_np (_thread.native_handle(), "butler");
100 boost::this_thread::disable_interruption dis;
103 boost::mutex::scoped_lock lm (_mutex);
107 _thread.interrupt ();
115 /** Caller must hold a lock on _mutex */
117 Butler::should_run () const
119 if (_video.size() >= MAXIMUM_VIDEO_READAHEAD * 10) {
120 /* This is way too big */
121 optional<DCPTime> pos = _audio.peek();
123 throw ProgrammingError
124 (__FILE__, __LINE__, String::compose ("Butler video buffers reached %1 frames (audio is %2 at %3)", _video.size(), _audio.size(), pos->get()));
126 throw ProgrammingError
127 (__FILE__, __LINE__, String::compose ("Butler video buffers reached %1 frames (audio is %2)", _video.size(), _audio.size()));
131 if (_audio.size() >= MAXIMUM_AUDIO_READAHEAD * 10) {
132 /* This is way too big */
133 optional<DCPTime> pos = _audio.peek();
135 throw ProgrammingError
136 (__FILE__, __LINE__, String::compose ("Butler audio buffers reached %1 frames at %2 (video is %3)", _audio.size(), pos->get(), _video.size()));
138 throw ProgrammingError
139 (__FILE__, __LINE__, String::compose ("Butler audio buffers reached %1 frames (video is %3)", _audio.size(), _video.size()));
143 if (_video.size() >= MAXIMUM_VIDEO_READAHEAD * 2) {
144 LOG_WARNING ("Butler video buffers reached %1 frames (audio is %2)", _video.size(), _audio.size());
147 if (_audio.size() >= MAXIMUM_AUDIO_READAHEAD * 2) {
148 LOG_WARNING ("Butler audio buffers reached %1 frames (video is %2)", _audio.size(), _video.size());
151 if (_stop_thread || _finished || _died || _suspended) {
152 /* Definitely do not run */
156 if (_video.size() < MINIMUM_VIDEO_READAHEAD || (!_disable_audio && _audio.size() < MINIMUM_AUDIO_READAHEAD)) {
157 /* Definitely do run: we need data */
161 /* Run if we aren't full of video or audio */
162 return (_video.size() < MAXIMUM_VIDEO_READAHEAD) && (_audio.size() < MAXIMUM_AUDIO_READAHEAD);
170 boost::mutex::scoped_lock lm (_mutex);
172 /* Wait until we have something to do */
173 while (!should_run() && !_pending_seek_position) {
177 /* Do any seek that has been requested */
178 if (_pending_seek_position) {
180 _player->seek (*_pending_seek_position, _pending_seek_accurate);
181 _pending_seek_position = optional<DCPTime> ();
184 /* Fill _video and _audio. Don't try to carry on if a pending seek appears
185 while lm is unlocked, as in that state nothing will be added to
188 while (should_run() && !_pending_seek_position) {
190 bool const r = _player->pass ();
194 _arrived.notify_all ();
197 _arrived.notify_all ();
200 } catch (boost::thread_interrupted) {
201 /* The butler thread is being terminated */
202 boost::mutex::scoped_lock lm (_mutex);
204 _arrived.notify_all ();
205 } catch (std::exception& e) {
207 boost::mutex::scoped_lock lm (_mutex);
209 _died_message = e.what ();
210 _arrived.notify_all ();
213 boost::mutex::scoped_lock lm (_mutex);
215 _arrived.notify_all ();
218 /** @param blocking true if we should block until video is available. If blocking is false
219 * and no video is immediately available the method will return a 0 PlayerVideo and the error AGAIN.
220 * @param e if non-0 this is filled with an error code (if an error occurs) or is untouched if no error occurs.
222 pair<shared_ptr<PlayerVideo>, DCPTime>
223 Butler::get_video (bool blocking, Error* e)
225 boost::mutex::scoped_lock lm (_mutex);
227 if (_suspended || (_video.empty() && !blocking)) {
229 e->code = Error::AGAIN;
231 return make_pair(shared_ptr<PlayerVideo>(), DCPTime());
234 /* Wait for data if we have none */
235 while (_video.empty() && !_finished && !_died) {
239 if (_video.empty()) {
242 e->code = Error::DIED;
243 e->message = _died_message;
244 } else if (_finished) {
245 e->code = Error::FINISHED;
247 e->code = Error::NONE;
250 return make_pair(shared_ptr<PlayerVideo>(), DCPTime());
253 pair<shared_ptr<PlayerVideo>, DCPTime> const r = _video.get ();
254 _summon.notify_all ();
258 optional<TextRingBuffers::Data>
259 Butler::get_closed_caption ()
261 boost::mutex::scoped_lock lm (_mutex);
262 return _closed_caption.get ();
266 Butler::seek (DCPTime position, bool accurate)
268 boost::mutex::scoped_lock lm (_mutex);
269 _awaiting = optional<DCPTime>();
270 seek_unlocked (position, accurate);
274 Butler::seek_unlocked (DCPTime position, bool accurate)
281 _pending_seek_position = position;
282 _pending_seek_accurate = accurate;
286 _closed_caption.clear ();
288 _summon.notify_all ();
292 Butler::video (shared_ptr<PlayerVideo> video, DCPTime time)
294 boost::mutex::scoped_lock lm (_mutex);
296 if (_pending_seek_position) {
297 /* Don't store any video in this case */
301 _preparer->request (video);
303 _video.put (video, time);
307 Butler::audio (shared_ptr<AudioBuffers> audio, DCPTime time, int frame_rate)
309 boost::mutex::scoped_lock lm (_mutex);
310 if (_pending_seek_position || _disable_audio) {
311 /* Don't store any audio in these cases */
315 _audio.put (remap (audio, _audio_channels, _audio_mapping), time, frame_rate);
318 /** Try to get `frames' frames of audio and copy it into `out'. Silence
319 * will be filled if no audio is available.
320 * @return time of this audio, or unset if there was a buffer underrun.
323 Butler::get_audio (float* out, Frame frames)
325 optional<DCPTime> t = _audio.get (out, _audio_channels, frames);
326 _summon.notify_all ();
331 Butler::disable_audio ()
333 boost::mutex::scoped_lock lm (_mutex);
334 _disable_audio = true;
338 Butler::memory_used () const
340 /* XXX: should also look at _audio.memory_used() */
341 return _video.memory_used();
345 Butler::player_change (ChangeType type)
347 boost::mutex::scoped_lock lm (_mutex);
349 if (type == CHANGE_TYPE_PENDING) {
351 } else if (type == CHANGE_TYPE_DONE) {
353 if (_died || _pending_seek_position) {
355 _summon.notify_all ();
360 DCPTime next = _video.get().second;
361 if (_awaiting && _awaiting > next) {
362 /* We have recently done a player_changed seek and our buffers haven't been refilled yet,
363 so assume that we're seeking to the same place as last time.
365 seek_to = *_awaiting;
370 seek_unlocked (seek_to, true);
372 } else if (type == CHANGE_TYPE_CANCELLED) {
377 _summon.notify_all ();
381 Butler::text (PlayerText pt, TextType type, optional<DCPTextTrack> track, DCPTimePeriod period)
383 if (type != TEXT_CLOSED_CAPTION) {
387 DCPOMATIC_ASSERT (track);
389 _closed_caption.put (pt, *track, period);
393 Butler::Error::summary () const
398 return "No error registered";
400 return "Butler not ready";
402 return String::compose("Butler died (%1)", message);
403 case Error::FINISHED:
404 return "Butler finished";