2 * An example showing how to play a stream sync'd to video, using ffmpeg.
7 #include <condition_variable>
25 #include "libavcodec/avcodec.h"
26 #include "libavformat/avformat.h"
27 #include "libavformat/avio.h"
28 #include "libavutil/time.h"
29 #include "libavutil/pixfmt.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/channel_layout.h"
32 #include "libswscale/swscale.h"
33 #include "libswresample/swresample.h"
43 #ifndef AL_SOFT_map_buffer
44 #define AL_SOFT_map_buffer 1
45 typedef unsigned int ALbitfieldSOFT
;
46 #define AL_MAP_READ_BIT_SOFT 0x00000001
47 #define AL_MAP_WRITE_BIT_SOFT 0x00000002
48 #define AL_MAP_PERSISTENT_BIT_SOFT 0x00000004
49 #define AL_PRESERVE_DATA_BIT_SOFT 0x00000008
50 typedef void (AL_APIENTRY
*LPALBUFFERSTORAGESOFT
)(ALuint buffer
, ALenum format
, const ALvoid
*data
, ALsizei size
, ALsizei freq
, ALbitfieldSOFT flags
);
51 typedef void* (AL_APIENTRY
*LPALMAPBUFFERSOFT
)(ALuint buffer
, ALsizei offset
, ALsizei length
, ALbitfieldSOFT access
);
52 typedef void (AL_APIENTRY
*LPALUNMAPBUFFERSOFT
)(ALuint buffer
);
53 typedef void (AL_APIENTRY
*LPALFLUSHMAPPEDBUFFERSOFT
)(ALuint buffer
, ALsizei offset
, ALsizei length
);
56 #ifndef AL_SOFT_events
57 #define AL_SOFT_events 1
58 #define AL_EVENT_CALLBACK_FUNCTION_SOFT 0x1220
59 #define AL_EVENT_CALLBACK_USER_PARAM_SOFT 0x1221
60 #define AL_EVENT_TYPE_BUFFER_COMPLETED_SOFT 0x1222
61 #define AL_EVENT_TYPE_SOURCE_STATE_CHANGED_SOFT 0x1223
62 #define AL_EVENT_TYPE_ERROR_SOFT 0x1224
63 #define AL_EVENT_TYPE_PERFORMANCE_SOFT 0x1225
64 #define AL_EVENT_TYPE_DEPRECATED_SOFT 0x1226
65 #define AL_EVENT_TYPE_DISCONNECTED_SOFT 0x1227
66 typedef void (AL_APIENTRY
*ALEVENTPROCSOFT
)(ALenum eventType
, ALuint object
, ALuint param
,
67 ALsizei length
, const ALchar
*message
,
69 typedef void (AL_APIENTRY
*LPALEVENTCONTROLSOFT
)(ALsizei count
, const ALenum
*types
, ALboolean enable
);
70 typedef void (AL_APIENTRY
*LPALEVENTCALLBACKSOFT
)(ALEVENTPROCSOFT callback
, void *userParam
);
71 typedef void* (AL_APIENTRY
*LPALGETPOINTERSOFT
)(ALenum pname
);
72 typedef void (AL_APIENTRY
*LPALGETPOINTERVSOFT
)(ALenum pname
, void **values
);
79 #define M_PI (3.14159265358979323846)
82 using nanoseconds
= std::chrono::nanoseconds
;
83 using microseconds
= std::chrono::microseconds
;
84 using milliseconds
= std::chrono::milliseconds
;
85 using seconds
= std::chrono::seconds
;
86 using seconds_d64
= std::chrono::duration
<double>;
88 const std::string
AppName("alffplay");
90 bool EnableDirectOut
= false;
91 bool EnableWideStereo
= false;
92 LPALGETSOURCEI64VSOFT alGetSourcei64vSOFT
;
93 LPALCGETINTEGER64VSOFT alcGetInteger64vSOFT
;
95 LPALBUFFERSTORAGESOFT alBufferStorageSOFT
;
96 LPALMAPBUFFERSOFT alMapBufferSOFT
;
97 LPALUNMAPBUFFERSOFT alUnmapBufferSOFT
;
99 LPALEVENTCONTROLSOFT alEventControlSOFT
;
100 LPALEVENTCALLBACKSOFT alEventCallbackSOFT
;
102 const seconds
AVNoSyncThreshold(10);
104 const milliseconds
VideoSyncThreshold(10);
105 #define VIDEO_PICTURE_QUEUE_SIZE 16
107 const seconds_d64
AudioSyncThreshold(0.03);
108 const milliseconds
AudioSampleCorrectionMax(50);
109 /* Averaging filter coefficient for audio sync. */
110 #define AUDIO_DIFF_AVG_NB 20
111 const double AudioAvgFilterCoeff
= std::pow(0.01, 1.0/AUDIO_DIFF_AVG_NB
);
112 /* Per-buffer size, in time */
113 const milliseconds
AudioBufferTime(20);
114 /* Buffer total size, in time (should be divisible by the buffer time) */
115 const milliseconds
AudioBufferTotalTime(800);
117 #define MAX_QUEUE_SIZE (15 * 1024 * 1024) /* Bytes of compressed data to keep queued */
120 FF_UPDATE_EVENT
= SDL_USEREVENT
,
125 enum class SyncMaster
{
134 inline microseconds
get_avtime()
135 { return microseconds(av_gettime()); }
137 /* Define unique_ptrs to auto-cleanup associated ffmpeg objects. */
138 struct AVIOContextDeleter
{
139 void operator()(AVIOContext
*ptr
) { avio_closep(&ptr
); }
141 using AVIOContextPtr
= std::unique_ptr
<AVIOContext
,AVIOContextDeleter
>;
143 struct AVFormatCtxDeleter
{
144 void operator()(AVFormatContext
*ptr
) { avformat_close_input(&ptr
); }
146 using AVFormatCtxPtr
= std::unique_ptr
<AVFormatContext
,AVFormatCtxDeleter
>;
148 struct AVCodecCtxDeleter
{
149 void operator()(AVCodecContext
*ptr
) { avcodec_free_context(&ptr
); }
151 using AVCodecCtxPtr
= std::unique_ptr
<AVCodecContext
,AVCodecCtxDeleter
>;
153 struct AVFrameDeleter
{
154 void operator()(AVFrame
*ptr
) { av_frame_free(&ptr
); }
156 using AVFramePtr
= std::unique_ptr
<AVFrame
,AVFrameDeleter
>;
158 struct SwrContextDeleter
{
159 void operator()(SwrContext
*ptr
) { swr_free(&ptr
); }
161 using SwrContextPtr
= std::unique_ptr
<SwrContext
,SwrContextDeleter
>;
163 struct SwsContextDeleter
{
164 void operator()(SwsContext
*ptr
) { sws_freeContext(ptr
); }
166 using SwsContextPtr
= std::unique_ptr
<SwsContext
,SwsContextDeleter
>;
170 std::deque
<AVPacket
> mPackets
;
171 size_t mTotalSize
{0};
174 ~PacketQueue() { clear(); }
176 bool empty() const noexcept
{ return mPackets
.empty(); }
177 size_t totalSize() const noexcept
{ return mTotalSize
; }
179 void put(const AVPacket
*pkt
)
181 mPackets
.push_back(AVPacket
{});
182 if(av_packet_ref(&mPackets
.back(), pkt
) != 0)
185 mTotalSize
+= mPackets
.back().size
;
188 AVPacket
*front() noexcept
189 { return &mPackets
.front(); }
193 AVPacket
*pkt
= &mPackets
.front();
194 mTotalSize
-= pkt
->size
;
195 av_packet_unref(pkt
);
196 mPackets
.pop_front();
201 for(AVPacket
&pkt
: mPackets
)
202 av_packet_unref(&pkt
);
214 AVStream
*mStream
{nullptr};
215 AVCodecCtxPtr mCodecCtx
;
217 std::mutex mQueueMtx
;
218 std::condition_variable mQueueCond
;
220 /* Used for clock difference average computation */
221 seconds_d64 mClockDiffAvg
{0};
223 /* Time of the next sample to be buffered */
224 nanoseconds mCurrentPts
{0};
226 /* Device clock time that the stream started at. */
227 nanoseconds mDeviceStartTime
{nanoseconds::min()};
229 /* Decompressed sample frame, and swresample context for conversion */
230 AVFramePtr mDecodedFrame
;
231 SwrContextPtr mSwresCtx
;
233 /* Conversion format, for what gets fed to OpenAL */
234 int mDstChanLayout
{0};
235 AVSampleFormat mDstSampleFmt
{AV_SAMPLE_FMT_NONE
};
237 /* Storage of converted samples */
238 uint8_t *mSamples
{nullptr};
239 int mSamplesLen
{0}; /* In samples */
244 ALenum mFormat
{AL_NONE
};
245 ALsizei mFrameSize
{0};
247 std::mutex mSrcMutex
;
248 std::condition_variable mSrcCond
;
249 std::atomic_flag mConnected
;
251 std::vector
<ALuint
> mBuffers
;
252 ALsizei mBufferIdx
{0};
254 AudioState(MovieState
&movie
) : mMovie(movie
)
255 { mConnected
.test_and_set(std::memory_order_relaxed
); }
259 alDeleteSources(1, &mSource
);
260 if(!mBuffers
.empty())
261 alDeleteBuffers(mBuffers
.size(), mBuffers
.data());
266 static void AL_APIENTRY
EventCallback(ALenum eventType
, ALuint object
, ALuint param
,
267 ALsizei length
, const ALchar
*message
,
270 nanoseconds
getClockNoLock();
271 nanoseconds
getClock()
273 std::lock_guard
<std::mutex
> lock(mSrcMutex
);
274 return getClockNoLock();
277 bool isBufferFilled();
278 void startPlayback();
282 bool readAudio(uint8_t *samples
, int length
);
290 AVStream
*mStream
{nullptr};
291 AVCodecCtxPtr mCodecCtx
;
293 std::mutex mQueueMtx
;
294 std::condition_variable mQueueCond
;
296 nanoseconds mClock
{0};
297 nanoseconds mFrameTimer
{0};
298 nanoseconds mFrameLastPts
{0};
299 nanoseconds mFrameLastDelay
{0};
300 nanoseconds mCurrentPts
{0};
301 /* time (av_gettime) at which we updated mCurrentPts - used to have running video pts */
302 microseconds mCurrentPtsTime
{0};
304 /* Decompressed video frame, and swscale context for conversion */
305 AVFramePtr mDecodedFrame
;
306 SwsContextPtr mSwscaleCtx
;
309 SDL_Texture
*mImage
{nullptr};
310 int mWidth
{0}, mHeight
{0}; /* Logical image size (actual size may be larger) */
311 std::atomic
<bool> mUpdated
{false};
317 SDL_DestroyTexture(mImage
);
321 std::array
<Picture
,VIDEO_PICTURE_QUEUE_SIZE
> mPictQ
;
322 size_t mPictQSize
{0}, mPictQRead
{0}, mPictQWrite
{0};
323 std::mutex mPictQMutex
;
324 std::condition_variable mPictQCond
;
325 bool mFirstUpdate
{true};
326 std::atomic
<bool> mEOS
{false};
327 std::atomic
<bool> mFinalUpdate
{false};
329 VideoState(MovieState
&movie
) : mMovie(movie
) { }
331 nanoseconds
getClock();
332 bool isBufferFilled();
334 static Uint32 SDLCALL
sdl_refresh_timer_cb(Uint32 interval
, void *opaque
);
335 void schedRefresh(milliseconds delay
);
336 void display(SDL_Window
*screen
, SDL_Renderer
*renderer
);
337 void refreshTimer(SDL_Window
*screen
, SDL_Renderer
*renderer
);
338 void updatePicture(SDL_Window
*screen
, SDL_Renderer
*renderer
);
339 int queuePicture(nanoseconds pts
);
344 AVIOContextPtr mIOContext
;
345 AVFormatCtxPtr mFormatCtx
;
347 SyncMaster mAVSyncType
{SyncMaster::Default
};
349 microseconds mClockBase
{0};
350 std::atomic
<bool> mPlaying
{false};
353 std::condition_variable mSendCond
;
354 /* NOTE: false/clear = need data, true/set = no data needed */
355 std::atomic_flag mSendDataGood
;
357 std::atomic
<bool> mQuit
{false};
362 std::thread mParseThread
;
363 std::thread mAudioThread
;
364 std::thread mVideoThread
;
366 std::string mFilename
;
368 MovieState(std::string fname
)
369 : mAudio(*this), mVideo(*this), mFilename(std::move(fname
))
374 if(mParseThread
.joinable())
378 static int decode_interrupt_cb(void *ctx
);
380 void setTitle(SDL_Window
*window
);
382 nanoseconds
getClock();
384 nanoseconds
getMasterClock();
386 nanoseconds
getDuration();
388 int streamComponentOpen(int stream_index
);
393 nanoseconds
AudioState::getClockNoLock()
395 // The audio clock is the timestamp of the sample currently being heard.
396 if(alcGetInteger64vSOFT
)
398 // If device start time = min, we aren't playing yet.
399 if(mDeviceStartTime
== nanoseconds::min())
400 return nanoseconds::zero();
402 // Get the current device clock time and latency.
403 auto device
= alcGetContextsDevice(alcGetCurrentContext());
404 ALCint64SOFT devtimes
[2] = {0,0};
405 alcGetInteger64vSOFT(device
, ALC_DEVICE_CLOCK_LATENCY_SOFT
, 2, devtimes
);
406 auto latency
= nanoseconds(devtimes
[1]);
407 auto device_time
= nanoseconds(devtimes
[0]);
409 // The clock is simply the current device time relative to the recorded
410 // start time. We can also subtract the latency to get more a accurate
411 // position of where the audio device actually is in the output stream.
412 return device_time
- mDeviceStartTime
- latency
;
415 /* The source-based clock is based on 4 components:
416 * 1 - The timestamp of the next sample to buffer (mCurrentPts)
417 * 2 - The length of the source's buffer queue
418 * (AudioBufferTime*AL_BUFFERS_QUEUED)
419 * 3 - The offset OpenAL is currently at in the source (the first value
420 * from AL_SAMPLE_OFFSET_LATENCY_SOFT)
421 * 4 - The latency between OpenAL and the DAC (the second value from
422 * AL_SAMPLE_OFFSET_LATENCY_SOFT)
424 * Subtracting the length of the source queue from the next sample's
425 * timestamp gives the timestamp of the sample at the start of the source
426 * queue. Adding the source offset to that results in the timestamp for the
427 * sample at OpenAL's current position, and subtracting the source latency
428 * from that gives the timestamp of the sample currently at the DAC.
430 nanoseconds pts
= mCurrentPts
;
433 ALint64SOFT offset
[2];
437 /* NOTE: The source state must be checked last, in case an underrun
438 * occurs and the source stops between retrieving the offset+latency
439 * and getting the state. */
440 if(alGetSourcei64vSOFT
)
441 alGetSourcei64vSOFT(mSource
, AL_SAMPLE_OFFSET_LATENCY_SOFT
, offset
);
445 alGetSourcei(mSource
, AL_SAMPLE_OFFSET
, &ioffset
);
446 offset
[0] = (ALint64SOFT
)ioffset
<< 32;
449 alGetSourcei(mSource
, AL_BUFFERS_QUEUED
, &queued
);
450 alGetSourcei(mSource
, AL_SOURCE_STATE
, &status
);
452 /* If the source is AL_STOPPED, then there was an underrun and all
453 * buffers are processed, so ignore the source queue. The audio thread
454 * will put the source into an AL_INITIAL state and clear the queue
455 * when it starts recovery. */
456 if(status
!= AL_STOPPED
)
458 using fixed32
= std::chrono::duration
<int64_t,std::ratio
<1,(1ll<<32)>>;
460 pts
-= AudioBufferTime
*queued
;
461 pts
+= std::chrono::duration_cast
<nanoseconds
>(
462 fixed32(offset
[0] / mCodecCtx
->sample_rate
)
465 /* Don't offset by the latency if the source isn't playing. */
466 if(status
== AL_PLAYING
)
467 pts
-= nanoseconds(offset
[1]);
470 return std::max(pts
, nanoseconds::zero());
473 bool AudioState::isBufferFilled()
475 /* All of OpenAL's buffer queueing happens under the mSrcMutex lock, as
476 * does the source gen. So when we're able to grab the lock and the source
477 * is valid, the queue must be full.
479 std::lock_guard
<std::mutex
> lock(mSrcMutex
);
483 void AudioState::startPlayback()
485 alSourcePlay(mSource
);
486 if(alcGetInteger64vSOFT
)
488 using fixed32
= std::chrono::duration
<int64_t,std::ratio
<1,(1ll<<32)>>;
490 // Subtract the total buffer queue time from the current pts to get the
491 // pts of the start of the queue.
492 nanoseconds startpts
= mCurrentPts
- AudioBufferTotalTime
;
493 int64_t srctimes
[2]={0,0};
494 alGetSourcei64vSOFT(mSource
, AL_SAMPLE_OFFSET_CLOCK_SOFT
, srctimes
);
495 auto device_time
= nanoseconds(srctimes
[1]);
496 auto src_offset
= std::chrono::duration_cast
<nanoseconds
>(fixed32(srctimes
[0])) /
497 mCodecCtx
->sample_rate
;
499 // The mixer may have ticked and incremented the device time and sample
500 // offset, so subtract the source offset from the device time to get
501 // the device time the source started at. Also subtract startpts to get
502 // the device time the stream would have started at to reach where it
504 mDeviceStartTime
= device_time
- src_offset
- startpts
;
508 int AudioState::getSync()
510 if(mMovie
.mAVSyncType
== SyncMaster::Audio
)
513 auto ref_clock
= mMovie
.getMasterClock();
514 auto diff
= ref_clock
- getClockNoLock();
516 if(!(diff
< AVNoSyncThreshold
&& diff
> -AVNoSyncThreshold
))
518 /* Difference is TOO big; reset accumulated average */
519 mClockDiffAvg
= seconds_d64::zero();
523 /* Accumulate the diffs */
524 mClockDiffAvg
= mClockDiffAvg
*AudioAvgFilterCoeff
+ diff
;
525 auto avg_diff
= mClockDiffAvg
*(1.0 - AudioAvgFilterCoeff
);
526 if(avg_diff
< AudioSyncThreshold
/2.0 && avg_diff
> -AudioSyncThreshold
)
529 /* Constrain the per-update difference to avoid exceedingly large skips */
530 diff
= std::min
<nanoseconds
>(std::max
<nanoseconds
>(diff
, -AudioSampleCorrectionMax
),
531 AudioSampleCorrectionMax
);
532 return (int)std::chrono::duration_cast
<seconds
>(diff
*mCodecCtx
->sample_rate
).count();
535 int AudioState::decodeFrame()
537 while(!mMovie
.mQuit
.load(std::memory_order_relaxed
))
539 std::unique_lock
<std::mutex
> lock(mQueueMtx
);
540 int ret
= avcodec_receive_frame(mCodecCtx
.get(), mDecodedFrame
.get());
541 if(ret
== AVERROR(EAGAIN
))
543 mMovie
.mSendDataGood
.clear(std::memory_order_relaxed
);
544 std::unique_lock
<std::mutex
>(mMovie
.mSendMtx
).unlock();
545 mMovie
.mSendCond
.notify_one();
547 mQueueCond
.wait(lock
);
548 ret
= avcodec_receive_frame(mCodecCtx
.get(), mDecodedFrame
.get());
549 } while(ret
== AVERROR(EAGAIN
));
552 if(ret
== AVERROR_EOF
) break;
553 mMovie
.mSendDataGood
.clear(std::memory_order_relaxed
);
554 mMovie
.mSendCond
.notify_one();
557 std::cerr
<< "Failed to decode frame: "<<ret
<<std::endl
;
561 if(mDecodedFrame
->nb_samples
<= 0)
563 av_frame_unref(mDecodedFrame
.get());
567 /* If provided, update w/ pts */
568 if(mDecodedFrame
->best_effort_timestamp
!= AV_NOPTS_VALUE
)
569 mCurrentPts
= std::chrono::duration_cast
<nanoseconds
>(
570 seconds_d64(av_q2d(mStream
->time_base
)*mDecodedFrame
->best_effort_timestamp
)
573 if(mDecodedFrame
->nb_samples
> mSamplesMax
)
577 &mSamples
, nullptr, mCodecCtx
->channels
,
578 mDecodedFrame
->nb_samples
, mDstSampleFmt
, 0
580 mSamplesMax
= mDecodedFrame
->nb_samples
;
582 /* Return the amount of sample frames converted */
583 int data_size
= swr_convert(mSwresCtx
.get(), &mSamples
, mDecodedFrame
->nb_samples
,
584 (const uint8_t**)mDecodedFrame
->data
, mDecodedFrame
->nb_samples
587 av_frame_unref(mDecodedFrame
.get());
594 /* Duplicates the sample at in to out, count times. The frame size is a
595 * multiple of the template type size.
598 static void sample_dup(uint8_t *out
, const uint8_t *in
, int count
, int frame_size
)
600 const T
*sample
= reinterpret_cast<const T
*>(in
);
601 T
*dst
= reinterpret_cast<T
*>(out
);
602 if(frame_size
== sizeof(T
))
603 std::fill_n(dst
, count
, *sample
);
606 /* NOTE: frame_size is a multiple of sizeof(T). */
607 int type_mult
= frame_size
/ sizeof(T
);
609 std::generate_n(dst
, count
*type_mult
,
610 [sample
,type_mult
,&i
]() -> T
621 bool AudioState::readAudio(uint8_t *samples
, int length
)
623 int sample_skip
= getSync();
626 /* Read the next chunk of data, refill the buffer, and queue it
628 length
/= mFrameSize
;
629 while(audio_size
< length
)
631 if(mSamplesLen
<= 0 || mSamplesPos
>= mSamplesLen
)
633 int frame_len
= decodeFrame();
634 if(frame_len
<= 0) break;
636 mSamplesLen
= frame_len
;
637 mSamplesPos
= std::min(mSamplesLen
, sample_skip
);
638 sample_skip
-= mSamplesPos
;
640 // Adjust the device start time and current pts by the amount we're
641 // skipping/duplicating, so that the clock remains correct for the
642 // current stream position.
643 auto skip
= nanoseconds(seconds(mSamplesPos
)) / mCodecCtx
->sample_rate
;
644 mDeviceStartTime
-= skip
;
649 int rem
= length
- audio_size
;
652 int len
= mSamplesLen
- mSamplesPos
;
653 if(rem
> len
) rem
= len
;
654 memcpy(samples
, mSamples
+ mSamplesPos
*mFrameSize
, rem
*mFrameSize
);
658 rem
= std::min(rem
, -mSamplesPos
);
660 /* Add samples by copying the first sample */
661 if((mFrameSize
&7) == 0)
662 sample_dup
<uint64_t>(samples
, mSamples
, rem
, mFrameSize
);
663 else if((mFrameSize
&3) == 0)
664 sample_dup
<uint32_t>(samples
, mSamples
, rem
, mFrameSize
);
665 else if((mFrameSize
&1) == 0)
666 sample_dup
<uint16_t>(samples
, mSamples
, rem
, mFrameSize
);
668 sample_dup
<uint8_t>(samples
, mSamples
, rem
, mFrameSize
);
672 mCurrentPts
+= nanoseconds(seconds(rem
)) / mCodecCtx
->sample_rate
;
673 samples
+= rem
*mFrameSize
;
679 if(audio_size
< length
)
681 int rem
= length
- audio_size
;
682 std::fill_n(samples
, rem
*mFrameSize
,
683 (mDstSampleFmt
== AV_SAMPLE_FMT_U8
) ? 0x80 : 0x00);
684 mCurrentPts
+= nanoseconds(seconds(rem
)) / mCodecCtx
->sample_rate
;
691 void AL_APIENTRY
AudioState::EventCallback(ALenum eventType
, ALuint object
, ALuint param
,
692 ALsizei length
, const ALchar
*message
,
695 AudioState
*self
= reinterpret_cast<AudioState
*>(userParam
);
697 if(eventType
== AL_EVENT_TYPE_BUFFER_COMPLETED_SOFT
)
699 /* Temporarily lock the source mutex to ensure it's not between
700 * checking the processed count and going to sleep.
702 std::unique_lock
<std::mutex
>(self
->mSrcMutex
).unlock();
703 self
->mSrcCond
.notify_one();
707 std::cout
<< "\n---- AL Event on AudioState "<<self
<<" ----\nEvent: ";
710 case AL_EVENT_TYPE_BUFFER_COMPLETED_SOFT
: std::cout
<< "Buffer completed"; break;
711 case AL_EVENT_TYPE_SOURCE_STATE_CHANGED_SOFT
: std::cout
<< "Source state changed"; break;
712 case AL_EVENT_TYPE_ERROR_SOFT
: std::cout
<< "API error"; break;
713 case AL_EVENT_TYPE_PERFORMANCE_SOFT
: std::cout
<< "Performance"; break;
714 case AL_EVENT_TYPE_DEPRECATED_SOFT
: std::cout
<< "Deprecated"; break;
715 case AL_EVENT_TYPE_DISCONNECTED_SOFT
: std::cout
<< "Disconnected"; break;
716 default: std::cout
<< "0x"<<std::hex
<<std::setw(4)<<std::setfill('0')<<eventType
<<
717 std::dec
<<std::setw(0)<<std::setfill(' '); break;
720 "Object ID: "<<object
<<"\n"
721 "Parameter: "<<param
<<"\n"
722 "Message: "<<std::string(message
, length
)<<"\n----"<<
725 if(eventType
== AL_EVENT_TYPE_DISCONNECTED_SOFT
)
727 { std::lock_guard
<std::mutex
> lock(self
->mSrcMutex
);
728 self
->mConnected
.clear(std::memory_order_release
);
730 std::unique_lock
<std::mutex
>(self
->mSrcMutex
).unlock();
731 self
->mSrcCond
.notify_one();
735 int AudioState::handler()
737 const std::array
<ALenum
,6> types
{{
738 AL_EVENT_TYPE_BUFFER_COMPLETED_SOFT
, AL_EVENT_TYPE_SOURCE_STATE_CHANGED_SOFT
,
739 AL_EVENT_TYPE_ERROR_SOFT
, AL_EVENT_TYPE_PERFORMANCE_SOFT
, AL_EVENT_TYPE_DEPRECATED_SOFT
,
740 AL_EVENT_TYPE_DISCONNECTED_SOFT
742 std::unique_lock
<std::mutex
> lock(mSrcMutex
);
743 milliseconds sleep_time
= AudioBufferTime
/ 3;
746 if(alEventControlSOFT
)
748 alEventControlSOFT(types
.size(), types
.data(), AL_TRUE
);
749 alEventCallbackSOFT(EventCallback
, this);
750 sleep_time
= AudioBufferTotalTime
;
753 /* Find a suitable format for OpenAL. */
755 if(mCodecCtx
->sample_fmt
== AV_SAMPLE_FMT_U8
|| mCodecCtx
->sample_fmt
== AV_SAMPLE_FMT_U8P
)
757 mDstSampleFmt
= AV_SAMPLE_FMT_U8
;
759 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_7POINT1
&&
760 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
761 (fmt
=alGetEnumValue("AL_FORMAT_71CHN8")) != AL_NONE
&& fmt
!= -1)
763 mDstChanLayout
= mCodecCtx
->channel_layout
;
767 if((mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1
||
768 mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1_BACK
) &&
769 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
770 (fmt
=alGetEnumValue("AL_FORMAT_51CHN8")) != AL_NONE
&& fmt
!= -1)
772 mDstChanLayout
= mCodecCtx
->channel_layout
;
776 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_MONO
)
778 mDstChanLayout
= mCodecCtx
->channel_layout
;
780 mFormat
= AL_FORMAT_MONO8
;
784 mDstChanLayout
= AV_CH_LAYOUT_STEREO
;
786 mFormat
= AL_FORMAT_STEREO8
;
789 if((mCodecCtx
->sample_fmt
== AV_SAMPLE_FMT_FLT
|| mCodecCtx
->sample_fmt
== AV_SAMPLE_FMT_FLTP
) &&
790 alIsExtensionPresent("AL_EXT_FLOAT32"))
792 mDstSampleFmt
= AV_SAMPLE_FMT_FLT
;
794 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_7POINT1
&&
795 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
796 (fmt
=alGetEnumValue("AL_FORMAT_71CHN32")) != AL_NONE
&& fmt
!= -1)
798 mDstChanLayout
= mCodecCtx
->channel_layout
;
802 if((mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1
||
803 mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1_BACK
) &&
804 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
805 (fmt
=alGetEnumValue("AL_FORMAT_51CHN32")) != AL_NONE
&& fmt
!= -1)
807 mDstChanLayout
= mCodecCtx
->channel_layout
;
811 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_MONO
)
813 mDstChanLayout
= mCodecCtx
->channel_layout
;
815 mFormat
= AL_FORMAT_MONO_FLOAT32
;
819 mDstChanLayout
= AV_CH_LAYOUT_STEREO
;
821 mFormat
= AL_FORMAT_STEREO_FLOAT32
;
826 mDstSampleFmt
= AV_SAMPLE_FMT_S16
;
828 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_7POINT1
&&
829 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
830 (fmt
=alGetEnumValue("AL_FORMAT_71CHN16")) != AL_NONE
&& fmt
!= -1)
832 mDstChanLayout
= mCodecCtx
->channel_layout
;
836 if((mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1
||
837 mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1_BACK
) &&
838 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
839 (fmt
=alGetEnumValue("AL_FORMAT_51CHN16")) != AL_NONE
&& fmt
!= -1)
841 mDstChanLayout
= mCodecCtx
->channel_layout
;
845 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_MONO
)
847 mDstChanLayout
= mCodecCtx
->channel_layout
;
849 mFormat
= AL_FORMAT_MONO16
;
853 mDstChanLayout
= AV_CH_LAYOUT_STEREO
;
855 mFormat
= AL_FORMAT_STEREO16
;
858 void *samples
= nullptr;
859 ALsizei buffer_len
= std::chrono::duration_cast
<std::chrono::duration
<int>>(
860 mCodecCtx
->sample_rate
* AudioBufferTime
).count() * mFrameSize
;
867 mDecodedFrame
.reset(av_frame_alloc());
870 std::cerr
<< "Failed to allocate audio frame" <<std::endl
;
874 mSwresCtx
.reset(swr_alloc_set_opts(nullptr,
875 mDstChanLayout
, mDstSampleFmt
, mCodecCtx
->sample_rate
,
876 mCodecCtx
->channel_layout
? mCodecCtx
->channel_layout
:
877 (uint64_t)av_get_default_channel_layout(mCodecCtx
->channels
),
878 mCodecCtx
->sample_fmt
, mCodecCtx
->sample_rate
,
881 if(!mSwresCtx
|| swr_init(mSwresCtx
.get()) != 0)
883 std::cerr
<< "Failed to initialize audio converter" <<std::endl
;
887 mBuffers
.assign(AudioBufferTotalTime
/ AudioBufferTime
, 0);
888 alGenBuffers(mBuffers
.size(), mBuffers
.data());
889 alGenSources(1, &mSource
);
892 alSourcei(mSource
, AL_DIRECT_CHANNELS_SOFT
, AL_TRUE
);
895 ALfloat angles
[2] = { (ALfloat
)(M_PI
/3.0), (ALfloat
)(-M_PI
/3.0) };
896 alSourcefv(mSource
, AL_STEREO_ANGLES
, angles
);
899 if(alGetError() != AL_NO_ERROR
)
902 if(!alBufferStorageSOFT
)
903 samples
= av_malloc(buffer_len
);
906 for(ALuint bufid
: mBuffers
)
907 alBufferStorageSOFT(bufid
, mFormat
, nullptr, buffer_len
, mCodecCtx
->sample_rate
,
908 AL_MAP_WRITE_BIT_SOFT
);
909 if(alGetError() != AL_NO_ERROR
)
911 fprintf(stderr
, "Failed to use mapped buffers\n");
912 samples
= av_malloc(buffer_len
);
916 while(alGetError() == AL_NO_ERROR
&& !mMovie
.mQuit
.load(std::memory_order_relaxed
) &&
917 mConnected
.test_and_set(std::memory_order_relaxed
))
919 /* First remove any processed buffers. */
921 alGetSourcei(mSource
, AL_BUFFERS_PROCESSED
, &processed
);
924 std::array
<ALuint
,4> bids
;
925 alSourceUnqueueBuffers(mSource
, std::min
<ALsizei
>(bids
.size(), processed
),
927 processed
-= std::min
<ALsizei
>(bids
.size(), processed
);
930 /* Refill the buffer queue. */
932 alGetSourcei(mSource
, AL_BUFFERS_QUEUED
, &queued
);
933 while((ALuint
)queued
< mBuffers
.size())
935 ALuint bufid
= mBuffers
[mBufferIdx
];
937 uint8_t *ptr
= reinterpret_cast<uint8_t*>(
938 samples
? samples
: alMapBufferSOFT(bufid
, 0, buffer_len
, AL_MAP_WRITE_BIT_SOFT
)
942 /* Read the next chunk of data, filling the buffer, and queue it on
944 bool got_audio
= readAudio(ptr
, buffer_len
);
945 if(!samples
) alUnmapBufferSOFT(bufid
);
946 if(!got_audio
) break;
949 alBufferData(bufid
, mFormat
, samples
, buffer_len
, mCodecCtx
->sample_rate
);
951 alSourceQueueBuffers(mSource
, 1, &bufid
);
952 mBufferIdx
= (mBufferIdx
+1) % mBuffers
.size();
958 /* Check that the source is playing. */
960 alGetSourcei(mSource
, AL_SOURCE_STATE
, &state
);
961 if(state
== AL_STOPPED
)
963 /* AL_STOPPED means there was an underrun. Clear the buffer queue
964 * since this likely means we're late, and rewind the source to get
965 * it back into an AL_INITIAL state.
967 alSourceRewind(mSource
);
968 alSourcei(mSource
, AL_BUFFER
, 0);
972 /* (re)start the source if needed, and wait for a buffer to finish */
973 if(state
!= AL_PLAYING
&& state
!= AL_PAUSED
&&
974 mMovie
.mPlaying
.load(std::memory_order_relaxed
))
977 mSrcCond
.wait_for(lock
, sleep_time
);
980 alSourceRewind(mSource
);
981 alSourcei(mSource
, AL_BUFFER
, 0);
986 if(alEventControlSOFT
)
988 alEventControlSOFT(types
.size(), types
.data(), AL_FALSE
);
989 alEventCallbackSOFT(nullptr, nullptr);
996 nanoseconds
VideoState::getClock()
998 /* NOTE: This returns incorrect times while not playing. */
999 auto delta
= get_avtime() - mCurrentPtsTime
;
1000 return mCurrentPts
+ delta
;
1003 bool VideoState::isBufferFilled()
1005 std::unique_lock
<std::mutex
> lock(mPictQMutex
);
1006 return mPictQSize
>= mPictQ
.size();
1009 Uint32 SDLCALL
VideoState::sdl_refresh_timer_cb(Uint32
/*interval*/, void *opaque
)
1012 evt
.user
.type
= FF_REFRESH_EVENT
;
1013 evt
.user
.data1
= opaque
;
1014 SDL_PushEvent(&evt
);
1015 return 0; /* 0 means stop timer */
1018 /* Schedules an FF_REFRESH_EVENT event to occur in 'delay' ms. */
1019 void VideoState::schedRefresh(milliseconds delay
)
1021 SDL_AddTimer(delay
.count(), sdl_refresh_timer_cb
, this);
1024 /* Called by VideoState::refreshTimer to display the next video frame. */
1025 void VideoState::display(SDL_Window
*screen
, SDL_Renderer
*renderer
)
1027 Picture
*vp
= &mPictQ
[mPictQRead
];
1036 if(mCodecCtx
->sample_aspect_ratio
.num
== 0)
1037 aspect_ratio
= 0.0f
;
1040 aspect_ratio
= av_q2d(mCodecCtx
->sample_aspect_ratio
) * mCodecCtx
->width
/
1043 if(aspect_ratio
<= 0.0f
)
1044 aspect_ratio
= (float)mCodecCtx
->width
/ (float)mCodecCtx
->height
;
1046 SDL_GetWindowSize(screen
, &win_w
, &win_h
);
1048 w
= ((int)rint(h
* aspect_ratio
) + 3) & ~3;
1052 h
= ((int)rint(w
/ aspect_ratio
) + 3) & ~3;
1054 x
= (win_w
- w
) / 2;
1055 y
= (win_h
- h
) / 2;
1057 SDL_Rect src_rect
{ 0, 0, vp
->mWidth
, vp
->mHeight
};
1058 SDL_Rect dst_rect
{ x
, y
, w
, h
};
1059 SDL_RenderCopy(renderer
, vp
->mImage
, &src_rect
, &dst_rect
);
1060 SDL_RenderPresent(renderer
);
1063 /* FF_REFRESH_EVENT handler called on the main thread where the SDL_Renderer
1064 * was created. It handles the display of the next decoded video frame (if not
1065 * falling behind), and sets up the timer for the following video frame.
1067 void VideoState::refreshTimer(SDL_Window
*screen
, SDL_Renderer
*renderer
)
1073 mFinalUpdate
= true;
1074 std::unique_lock
<std::mutex
>(mPictQMutex
).unlock();
1075 mPictQCond
.notify_all();
1078 schedRefresh(milliseconds(100));
1081 if(!mMovie
.mPlaying
.load(std::memory_order_relaxed
))
1083 schedRefresh(milliseconds(1));
1087 std::unique_lock
<std::mutex
> lock(mPictQMutex
);
1092 mFinalUpdate
= true;
1094 schedRefresh(milliseconds(1));
1096 mPictQCond
.notify_all();
1100 Picture
*vp
= &mPictQ
[mPictQRead
];
1101 mCurrentPts
= vp
->mPts
;
1102 mCurrentPtsTime
= get_avtime();
1104 /* Get delay using the frame pts and the pts from last frame. */
1105 auto delay
= vp
->mPts
- mFrameLastPts
;
1106 if(delay
<= seconds::zero() || delay
>= seconds(1))
1108 /* If incorrect delay, use previous one. */
1109 delay
= mFrameLastDelay
;
1111 /* Save for next frame. */
1112 mFrameLastDelay
= delay
;
1113 mFrameLastPts
= vp
->mPts
;
1115 /* Update delay to sync to clock if not master source. */
1116 if(mMovie
.mAVSyncType
!= SyncMaster::Video
)
1118 auto ref_clock
= mMovie
.getMasterClock();
1119 auto diff
= vp
->mPts
- ref_clock
;
1121 /* Skip or repeat the frame. Take delay into account. */
1122 auto sync_threshold
= std::min
<nanoseconds
>(delay
, VideoSyncThreshold
);
1123 if(!(diff
< AVNoSyncThreshold
&& diff
> -AVNoSyncThreshold
))
1125 if(diff
<= -sync_threshold
)
1126 delay
= nanoseconds::zero();
1127 else if(diff
>= sync_threshold
)
1132 mFrameTimer
+= delay
;
1133 /* Compute the REAL delay. */
1134 auto actual_delay
= mFrameTimer
- get_avtime();
1135 if(!(actual_delay
>= VideoSyncThreshold
))
1137 /* We don't have time to handle this picture, just skip to the next one. */
1138 mPictQRead
= (mPictQRead
+1)%mPictQ
.size();
1142 schedRefresh(std::chrono::duration_cast
<milliseconds
>(actual_delay
));
1144 /* Show the picture! */
1145 display(screen
, renderer
);
1147 /* Update queue for next picture. */
1148 mPictQRead
= (mPictQRead
+1)%mPictQ
.size();
1151 mPictQCond
.notify_all();
1154 /* FF_UPDATE_EVENT handler, updates the picture's texture. It's called on the
1155 * main thread where the renderer was created.
1157 void VideoState::updatePicture(SDL_Window
*screen
, SDL_Renderer
*renderer
)
1159 Picture
*vp
= &mPictQ
[mPictQWrite
];
1160 bool fmt_updated
= false;
1162 /* allocate or resize the buffer! */
1163 if(!vp
->mImage
|| vp
->mWidth
!= mCodecCtx
->width
|| vp
->mHeight
!= mCodecCtx
->height
)
1167 SDL_DestroyTexture(vp
->mImage
);
1168 vp
->mImage
= SDL_CreateTexture(
1169 renderer
, SDL_PIXELFORMAT_IYUV
, SDL_TEXTUREACCESS_STREAMING
,
1170 mCodecCtx
->coded_width
, mCodecCtx
->coded_height
1173 std::cerr
<< "Failed to create YV12 texture!" <<std::endl
;
1174 vp
->mWidth
= mCodecCtx
->width
;
1175 vp
->mHeight
= mCodecCtx
->height
;
1177 if(mFirstUpdate
&& vp
->mWidth
> 0 && vp
->mHeight
> 0)
1179 /* For the first update, set the window size to the video size. */
1180 mFirstUpdate
= false;
1183 int h
= vp
->mHeight
;
1184 if(mCodecCtx
->sample_aspect_ratio
.den
!= 0)
1186 double aspect_ratio
= av_q2d(mCodecCtx
->sample_aspect_ratio
);
1187 if(aspect_ratio
>= 1.0)
1188 w
= (int)(w
*aspect_ratio
+ 0.5);
1189 else if(aspect_ratio
> 0.0)
1190 h
= (int)(h
/aspect_ratio
+ 0.5);
1192 SDL_SetWindowSize(screen
, w
, h
);
1198 AVFrame
*frame
= mDecodedFrame
.get();
1199 void *pixels
= nullptr;
1202 if(mCodecCtx
->pix_fmt
== AV_PIX_FMT_YUV420P
)
1203 SDL_UpdateYUVTexture(vp
->mImage
, nullptr,
1204 frame
->data
[0], frame
->linesize
[0],
1205 frame
->data
[1], frame
->linesize
[1],
1206 frame
->data
[2], frame
->linesize
[2]
1208 else if(SDL_LockTexture(vp
->mImage
, nullptr, &pixels
, &pitch
) != 0)
1209 std::cerr
<< "Failed to lock texture" <<std::endl
;
1212 // Convert the image into YUV format that SDL uses
1213 int coded_w
= mCodecCtx
->coded_width
;
1214 int coded_h
= mCodecCtx
->coded_height
;
1215 int w
= mCodecCtx
->width
;
1216 int h
= mCodecCtx
->height
;
1217 if(!mSwscaleCtx
|| fmt_updated
)
1219 mSwscaleCtx
.reset(sws_getContext(
1220 w
, h
, mCodecCtx
->pix_fmt
,
1221 w
, h
, AV_PIX_FMT_YUV420P
, 0,
1222 nullptr, nullptr, nullptr
1226 /* point pict at the queue */
1227 uint8_t *pict_data
[3];
1228 pict_data
[0] = reinterpret_cast<uint8_t*>(pixels
);
1229 pict_data
[1] = pict_data
[0] + coded_w
*coded_h
;
1230 pict_data
[2] = pict_data
[1] + coded_w
*coded_h
/4;
1232 int pict_linesize
[3];
1233 pict_linesize
[0] = pitch
;
1234 pict_linesize
[1] = pitch
/ 2;
1235 pict_linesize
[2] = pitch
/ 2;
1237 sws_scale(mSwscaleCtx
.get(), (const uint8_t**)frame
->data
,
1238 frame
->linesize
, 0, h
, pict_data
, pict_linesize
);
1239 SDL_UnlockTexture(vp
->mImage
);
1243 vp
->mUpdated
.store(true, std::memory_order_release
);
1244 std::unique_lock
<std::mutex
>(mPictQMutex
).unlock();
1245 mPictQCond
.notify_one();
1248 int VideoState::queuePicture(nanoseconds pts
)
1250 /* Wait until we have space for a new pic */
1251 std::unique_lock
<std::mutex
> lock(mPictQMutex
);
1252 while(mPictQSize
>= mPictQ
.size() && !mMovie
.mQuit
.load(std::memory_order_relaxed
))
1253 mPictQCond
.wait(lock
);
1256 if(mMovie
.mQuit
.load(std::memory_order_relaxed
))
1259 Picture
*vp
= &mPictQ
[mPictQWrite
];
1261 /* We have to create/update the picture in the main thread */
1262 vp
->mUpdated
.store(false, std::memory_order_relaxed
);
1264 evt
.user
.type
= FF_UPDATE_EVENT
;
1265 evt
.user
.data1
= this;
1266 SDL_PushEvent(&evt
);
1268 /* Wait until the picture is updated. */
1270 while(!vp
->mUpdated
.load(std::memory_order_relaxed
))
1272 if(mMovie
.mQuit
.load(std::memory_order_relaxed
))
1274 mPictQCond
.wait(lock
);
1276 if(mMovie
.mQuit
.load(std::memory_order_relaxed
))
1280 mPictQWrite
= (mPictQWrite
+1)%mPictQ
.size();
1287 int VideoState::handler()
1289 mDecodedFrame
.reset(av_frame_alloc());
1290 while(!mMovie
.mQuit
.load(std::memory_order_relaxed
))
1292 std::unique_lock
<std::mutex
> lock(mQueueMtx
);
1293 /* Decode video frame */
1294 int ret
= avcodec_receive_frame(mCodecCtx
.get(), mDecodedFrame
.get());
1295 if(ret
== AVERROR(EAGAIN
))
1297 mMovie
.mSendDataGood
.clear(std::memory_order_relaxed
);
1298 std::unique_lock
<std::mutex
>(mMovie
.mSendMtx
).unlock();
1299 mMovie
.mSendCond
.notify_one();
1301 mQueueCond
.wait(lock
);
1302 ret
= avcodec_receive_frame(mCodecCtx
.get(), mDecodedFrame
.get());
1303 } while(ret
== AVERROR(EAGAIN
));
1306 if(ret
== AVERROR_EOF
) break;
1307 mMovie
.mSendDataGood
.clear(std::memory_order_relaxed
);
1308 mMovie
.mSendCond
.notify_one();
1311 std::cerr
<< "Failed to decode frame: "<<ret
<<std::endl
;
1315 /* Get the PTS for this frame. */
1317 if(mDecodedFrame
->best_effort_timestamp
!= AV_NOPTS_VALUE
)
1318 mClock
= std::chrono::duration_cast
<nanoseconds
>(
1319 seconds_d64(av_q2d(mStream
->time_base
)*mDecodedFrame
->best_effort_timestamp
)
1323 /* Update the video clock to the next expected PTS. */
1324 auto frame_delay
= av_q2d(mCodecCtx
->time_base
);
1325 frame_delay
+= mDecodedFrame
->repeat_pict
* (frame_delay
* 0.5);
1326 mClock
+= std::chrono::duration_cast
<nanoseconds
>(seconds_d64(frame_delay
));
1328 if(queuePicture(pts
) < 0)
1330 av_frame_unref(mDecodedFrame
.get());
1334 std::unique_lock
<std::mutex
> lock(mPictQMutex
);
1335 if(mMovie
.mQuit
.load(std::memory_order_relaxed
))
1341 while(!mFinalUpdate
)
1342 mPictQCond
.wait(lock
);
1348 int MovieState::decode_interrupt_cb(void *ctx
)
1350 return reinterpret_cast<MovieState
*>(ctx
)->mQuit
.load(std::memory_order_relaxed
);
1353 bool MovieState::prepare()
1355 AVIOContext
*avioctx
= nullptr;
1356 AVIOInterruptCB intcb
= { decode_interrupt_cb
, this };
1357 if(avio_open2(&avioctx
, mFilename
.c_str(), AVIO_FLAG_READ
, &intcb
, nullptr))
1359 std::cerr
<< "Failed to open "<<mFilename
<<std::endl
;
1362 mIOContext
.reset(avioctx
);
1364 /* Open movie file. If avformat_open_input fails it will automatically free
1365 * this context, so don't set it onto a smart pointer yet.
1367 AVFormatContext
*fmtctx
= avformat_alloc_context();
1368 fmtctx
->pb
= mIOContext
.get();
1369 fmtctx
->interrupt_callback
= intcb
;
1370 if(avformat_open_input(&fmtctx
, mFilename
.c_str(), nullptr, nullptr) != 0)
1372 std::cerr
<< "Failed to open "<<mFilename
<<std::endl
;
1375 mFormatCtx
.reset(fmtctx
);
1377 /* Retrieve stream information */
1378 if(avformat_find_stream_info(mFormatCtx
.get(), nullptr) < 0)
1380 std::cerr
<< mFilename
<<": failed to find stream info" <<std::endl
;
1384 mVideo
.schedRefresh(milliseconds(40));
1386 mParseThread
= std::thread(std::mem_fn(&MovieState::parse_handler
), this);
1390 void MovieState::setTitle(SDL_Window
*window
)
1392 auto pos1
= mFilename
.rfind('/');
1393 auto pos2
= mFilename
.rfind('\\');
1394 auto fpos
= ((pos1
== std::string::npos
) ? pos2
:
1395 (pos2
== std::string::npos
) ? pos1
:
1396 std::max(pos1
, pos2
)) + 1;
1397 SDL_SetWindowTitle(window
, (mFilename
.substr(fpos
)+" - "+AppName
).c_str());
1400 nanoseconds
MovieState::getClock()
1402 if(!mPlaying
.load(std::memory_order_relaxed
))
1403 return nanoseconds::zero();
1404 return get_avtime() - mClockBase
;
1407 nanoseconds
MovieState::getMasterClock()
1409 if(mAVSyncType
== SyncMaster::Video
)
1410 return mVideo
.getClock();
1411 if(mAVSyncType
== SyncMaster::Audio
)
1412 return mAudio
.getClock();
1416 nanoseconds
MovieState::getDuration()
1417 { return std::chrono::duration
<int64_t,std::ratio
<1,AV_TIME_BASE
>>(mFormatCtx
->duration
); }
1419 int MovieState::streamComponentOpen(int stream_index
)
1421 if(stream_index
< 0 || (unsigned int)stream_index
>= mFormatCtx
->nb_streams
)
1424 /* Get a pointer to the codec context for the stream, and open the
1427 AVCodecCtxPtr
avctx(avcodec_alloc_context3(nullptr));
1428 if(!avctx
) return -1;
1430 if(avcodec_parameters_to_context(avctx
.get(), mFormatCtx
->streams
[stream_index
]->codecpar
))
1433 AVCodec
*codec
= avcodec_find_decoder(avctx
->codec_id
);
1434 if(!codec
|| avcodec_open2(avctx
.get(), codec
, nullptr) < 0)
1436 std::cerr
<< "Unsupported codec: "<<avcodec_get_name(avctx
->codec_id
)
1437 << " (0x"<<std::hex
<<avctx
->codec_id
<<std::dec
<<")" <<std::endl
;
1441 /* Initialize and start the media type handler */
1442 switch(avctx
->codec_type
)
1444 case AVMEDIA_TYPE_AUDIO
:
1445 mAudio
.mStream
= mFormatCtx
->streams
[stream_index
];
1446 mAudio
.mCodecCtx
= std::move(avctx
);
1448 mAudioThread
= std::thread(std::mem_fn(&AudioState::handler
), &mAudio
);
1451 case AVMEDIA_TYPE_VIDEO
:
1452 mVideo
.mStream
= mFormatCtx
->streams
[stream_index
];
1453 mVideo
.mCodecCtx
= std::move(avctx
);
1455 mVideoThread
= std::thread(std::mem_fn(&VideoState::handler
), &mVideo
);
1462 return stream_index
;
1465 int MovieState::parse_handler()
1467 int video_index
= -1;
1468 int audio_index
= -1;
1470 /* Dump information about file onto standard error */
1471 av_dump_format(mFormatCtx
.get(), 0, mFilename
.c_str(), 0);
1473 /* Find the first video and audio streams */
1474 for(unsigned int i
= 0;i
< mFormatCtx
->nb_streams
;i
++)
1476 auto codecpar
= mFormatCtx
->streams
[i
]->codecpar
;
1477 if(codecpar
->codec_type
== AVMEDIA_TYPE_VIDEO
&& video_index
< 0)
1478 video_index
= streamComponentOpen(i
);
1479 else if(codecpar
->codec_type
== AVMEDIA_TYPE_AUDIO
&& audio_index
< 0)
1480 audio_index
= streamComponentOpen(i
);
1483 if(video_index
< 0 && audio_index
< 0)
1485 std::cerr
<< mFilename
<<": could not open codecs" <<std::endl
;
1489 PacketQueue audio_queue
, video_queue
;
1490 bool input_finished
= false;
1492 /* Main packet reading/dispatching loop */
1493 while(!mQuit
.load(std::memory_order_relaxed
) && !input_finished
)
1496 if(av_read_frame(mFormatCtx
.get(), &packet
) < 0)
1497 input_finished
= true;
1500 /* Copy the packet into the queue it's meant for. */
1501 if(packet
.stream_index
== video_index
)
1502 video_queue
.put(&packet
);
1503 else if(packet
.stream_index
== audio_index
)
1504 audio_queue
.put(&packet
);
1505 av_packet_unref(&packet
);
1509 /* Send whatever queued packets we have. */
1510 if(!audio_queue
.empty())
1512 std::unique_lock
<std::mutex
> lock(mAudio
.mQueueMtx
);
1515 ret
= avcodec_send_packet(mAudio
.mCodecCtx
.get(), audio_queue
.front());
1516 if(ret
!= AVERROR(EAGAIN
)) audio_queue
.pop();
1517 } while(ret
!= AVERROR(EAGAIN
) && !audio_queue
.empty());
1519 mAudio
.mQueueCond
.notify_one();
1521 if(!video_queue
.empty())
1523 std::unique_lock
<std::mutex
> lock(mVideo
.mQueueMtx
);
1526 ret
= avcodec_send_packet(mVideo
.mCodecCtx
.get(), video_queue
.front());
1527 if(ret
!= AVERROR(EAGAIN
)) video_queue
.pop();
1528 } while(ret
!= AVERROR(EAGAIN
) && !video_queue
.empty());
1530 mVideo
.mQueueCond
.notify_one();
1532 /* If the queues are completely empty, or it's not full and there's
1533 * more input to read, go get more.
1535 size_t queue_size
= audio_queue
.totalSize() + video_queue
.totalSize();
1536 if(queue_size
== 0 || (queue_size
< MAX_QUEUE_SIZE
&& !input_finished
))
1539 if(!mPlaying
.load(std::memory_order_relaxed
))
1541 if((!mAudio
.mCodecCtx
|| mAudio
.isBufferFilled()) &&
1542 (!mVideo
.mCodecCtx
|| mVideo
.isBufferFilled()))
1544 /* Set the base time 50ms ahead of the current av time. */
1545 mClockBase
= get_avtime() + milliseconds(50);
1546 mVideo
.mCurrentPtsTime
= mClockBase
;
1547 mVideo
.mFrameTimer
= mVideo
.mCurrentPtsTime
;
1548 mAudio
.startPlayback();
1549 mPlaying
.store(std::memory_order_release
);
1552 /* Nothing to send or get for now, wait a bit and try again. */
1553 { std::unique_lock
<std::mutex
> lock(mSendMtx
);
1554 if(mSendDataGood
.test_and_set(std::memory_order_relaxed
))
1555 mSendCond
.wait_for(lock
, milliseconds(10));
1557 } while(!mQuit
.load(std::memory_order_relaxed
));
1559 /* Pass a null packet to finish the send buffers (the receive functions
1560 * will get AVERROR_EOF when emptied).
1562 if(mVideo
.mCodecCtx
)
1564 { std::lock_guard
<std::mutex
> lock(mVideo
.mQueueMtx
);
1565 avcodec_send_packet(mVideo
.mCodecCtx
.get(), nullptr);
1567 mVideo
.mQueueCond
.notify_one();
1569 if(mAudio
.mCodecCtx
)
1571 { std::lock_guard
<std::mutex
> lock(mAudio
.mQueueMtx
);
1572 avcodec_send_packet(mAudio
.mCodecCtx
.get(), nullptr);
1574 mAudio
.mQueueCond
.notify_one();
1576 video_queue
.clear();
1577 audio_queue
.clear();
1579 /* all done - wait for it */
1580 if(mVideoThread
.joinable())
1581 mVideoThread
.join();
1582 if(mAudioThread
.joinable())
1583 mAudioThread
.join();
1586 std::unique_lock
<std::mutex
> lock(mVideo
.mPictQMutex
);
1587 while(!mVideo
.mFinalUpdate
)
1588 mVideo
.mPictQCond
.wait(lock
);
1592 evt
.user
.type
= FF_MOVIE_DONE_EVENT
;
1593 SDL_PushEvent(&evt
);
1599 // Helper class+method to print the time with human-readable formatting.
1603 inline std::ostream
&operator<<(std::ostream
&os
, const PrettyTime
&rhs
)
1605 using hours
= std::chrono::hours
;
1606 using minutes
= std::chrono::minutes
;
1607 using std::chrono::duration_cast
;
1609 seconds t
= rhs
.mTime
;
1616 // Only handle up to hour formatting
1618 os
<< duration_cast
<hours
>(t
).count() << 'h' << std::setfill('0') << std::setw(2)
1619 << (duration_cast
<minutes
>(t
).count() % 60) << 'm';
1621 os
<< duration_cast
<minutes
>(t
).count() << 'm' << std::setfill('0');
1622 os
<< std::setw(2) << (duration_cast
<seconds
>(t
).count() % 60) << 's' << std::setw(0)
1623 << std::setfill(' ');
1630 int main(int argc
, char *argv
[])
1632 std::unique_ptr
<MovieState
> movState
;
1636 std::cerr
<< "Usage: "<<argv
[0]<<" [-device <device name>] [-direct] <files...>" <<std::endl
;
1639 /* Register all formats and codecs */
1641 /* Initialize networking protocols */
1642 avformat_network_init();
1644 if(SDL_Init(SDL_INIT_VIDEO
| SDL_INIT_TIMER
))
1646 std::cerr
<< "Could not initialize SDL - <<"<<SDL_GetError() <<std::endl
;
1650 /* Make a window to put our video */
1651 SDL_Window
*screen
= SDL_CreateWindow(AppName
.c_str(), 0, 0, 640, 480, SDL_WINDOW_RESIZABLE
);
1654 std::cerr
<< "SDL: could not set video mode - exiting" <<std::endl
;
1657 /* Make a renderer to handle the texture image surface and rendering. */
1658 Uint32 render_flags
= SDL_RENDERER_ACCELERATED
| SDL_RENDERER_PRESENTVSYNC
;
1659 SDL_Renderer
*renderer
= SDL_CreateRenderer(screen
, -1, render_flags
);
1662 SDL_RendererInfo rinf
{};
1665 /* Make sure the renderer supports IYUV textures. If not, fallback to a
1666 * software renderer. */
1667 if(SDL_GetRendererInfo(renderer
, &rinf
) == 0)
1669 for(Uint32 i
= 0;!ok
&& i
< rinf
.num_texture_formats
;i
++)
1670 ok
= (rinf
.texture_formats
[i
] == SDL_PIXELFORMAT_IYUV
);
1674 std::cerr
<< "IYUV pixelformat textures not supported on renderer "<<rinf
.name
<<std::endl
;
1675 SDL_DestroyRenderer(renderer
);
1681 render_flags
= SDL_RENDERER_SOFTWARE
| SDL_RENDERER_PRESENTVSYNC
;
1682 renderer
= SDL_CreateRenderer(screen
, -1, render_flags
);
1686 std::cerr
<< "SDL: could not create renderer - exiting" <<std::endl
;
1689 SDL_SetRenderDrawColor(renderer
, 0, 0, 0, 255);
1690 SDL_RenderFillRect(renderer
, nullptr);
1691 SDL_RenderPresent(renderer
);
1693 /* Open an audio device */
1695 ALCdevice
*device
= [argc
,argv
,&fileidx
]() -> ALCdevice
*
1697 ALCdevice
*dev
= NULL
;
1698 if(argc
> 3 && strcmp(argv
[1], "-device") == 0)
1701 dev
= alcOpenDevice(argv
[2]);
1703 std::cerr
<< "Failed to open \""<<argv
[2]<<"\" - trying default" <<std::endl
;
1705 return alcOpenDevice(nullptr);
1707 ALCcontext
*context
= alcCreateContext(device
, nullptr);
1708 if(!context
|| alcMakeContextCurrent(context
) == ALC_FALSE
)
1710 std::cerr
<< "Failed to set up audio device" <<std::endl
;
1712 alcDestroyContext(context
);
1716 const ALCchar
*name
= nullptr;
1717 if(alcIsExtensionPresent(device
, "ALC_ENUMERATE_ALL_EXT"))
1718 name
= alcGetString(device
, ALC_ALL_DEVICES_SPECIFIER
);
1719 if(!name
|| alcGetError(device
) != AL_NO_ERROR
)
1720 name
= alcGetString(device
, ALC_DEVICE_SPECIFIER
);
1721 std::cout
<< "Opened \""<<name
<<"\"" <<std::endl
;
1723 if(alcIsExtensionPresent(device
, "ALC_SOFT_device_clock"))
1725 std::cout
<< "Found ALC_SOFT_device_clock" <<std::endl
;
1726 alcGetInteger64vSOFT
= reinterpret_cast<LPALCGETINTEGER64VSOFT
>(
1727 alcGetProcAddress(device
, "alcGetInteger64vSOFT")
1731 if(alIsExtensionPresent("AL_SOFT_source_latency"))
1733 std::cout
<< "Found AL_SOFT_source_latency" <<std::endl
;
1734 alGetSourcei64vSOFT
= reinterpret_cast<LPALGETSOURCEI64VSOFT
>(
1735 alGetProcAddress("alGetSourcei64vSOFT")
1738 if(alIsExtensionPresent("AL_SOFTX_map_buffer"))
1740 std::cout
<< "Found AL_SOFT_map_buffer" <<std::endl
;
1741 alBufferStorageSOFT
= reinterpret_cast<LPALBUFFERSTORAGESOFT
>(
1742 alGetProcAddress("alBufferStorageSOFT"));
1743 alMapBufferSOFT
= reinterpret_cast<LPALMAPBUFFERSOFT
>(
1744 alGetProcAddress("alMapBufferSOFT"));
1745 alUnmapBufferSOFT
= reinterpret_cast<LPALUNMAPBUFFERSOFT
>(
1746 alGetProcAddress("alUnmapBufferSOFT"));
1748 if(alIsExtensionPresent("AL_SOFTX_events"))
1750 std::cout
<< "Found AL_SOFT_events" <<std::endl
;
1751 alEventControlSOFT
= reinterpret_cast<LPALEVENTCONTROLSOFT
>(
1752 alGetProcAddress("alEventControlSOFT"));
1753 alEventCallbackSOFT
= reinterpret_cast<LPALEVENTCALLBACKSOFT
>(
1754 alGetProcAddress("alEventCallbackSOFT"));
1757 for(;fileidx
< argc
;++fileidx
)
1759 if(strcmp(argv
[fileidx
], "-direct") == 0)
1761 if(!alIsExtensionPresent("AL_SOFT_direct_channels"))
1762 std::cerr
<< "AL_SOFT_direct_channels not supported for direct output" <<std::endl
;
1765 std::cout
<< "Found AL_SOFT_direct_channels" <<std::endl
;
1766 EnableDirectOut
= true;
1769 else if(strcmp(argv
[fileidx
], "-wide") == 0)
1771 if(!alIsExtensionPresent("AL_EXT_STEREO_ANGLES"))
1772 std::cerr
<< "AL_EXT_STEREO_ANGLES not supported for wide stereo" <<std::endl
;
1775 std::cout
<< "Found AL_EXT_STEREO_ANGLES" <<std::endl
;
1776 EnableWideStereo
= true;
1783 while(fileidx
< argc
&& !movState
)
1785 movState
= std::unique_ptr
<MovieState
>(new MovieState(argv
[fileidx
++]));
1786 if(!movState
->prepare()) movState
= nullptr;
1790 std::cerr
<< "Could not start a video" <<std::endl
;
1793 movState
->setTitle(screen
);
1795 /* Default to going to the next movie at the end of one. */
1796 enum class EomAction
{
1798 } eom_action
= EomAction::Next
;
1799 seconds
last_time(-1);
1803 int have_evt
= SDL_WaitEventTimeout(&event
, 10);
1805 auto cur_time
= std::chrono::duration_cast
<seconds
>(movState
->getMasterClock());
1806 if(cur_time
!= last_time
)
1808 auto end_time
= std::chrono::duration_cast
<seconds
>(movState
->getDuration());
1809 std::cout
<< "\r "<<PrettyTime
{cur_time
}<<" / "<<PrettyTime
{end_time
} <<std::flush
;
1810 last_time
= cur_time
;
1812 if(!have_evt
) continue;
1817 switch(event
.key
.keysym
.sym
)
1820 movState
->mQuit
= true;
1821 eom_action
= EomAction::Quit
;
1825 movState
->mQuit
= true;
1826 eom_action
= EomAction::Next
;
1834 case SDL_WINDOWEVENT
:
1835 switch(event
.window
.event
)
1837 case SDL_WINDOWEVENT_RESIZED
:
1838 SDL_SetRenderDrawColor(renderer
, 0, 0, 0, 255);
1839 SDL_RenderFillRect(renderer
, nullptr);
1848 movState
->mQuit
= true;
1849 eom_action
= EomAction::Quit
;
1852 case FF_UPDATE_EVENT
:
1853 reinterpret_cast<VideoState
*>(event
.user
.data1
)->updatePicture(
1858 case FF_REFRESH_EVENT
:
1859 reinterpret_cast<VideoState
*>(event
.user
.data1
)->refreshTimer(
1864 case FF_MOVIE_DONE_EVENT
:
1866 last_time
= seconds(-1);
1867 if(eom_action
!= EomAction::Quit
)
1870 while(fileidx
< argc
&& !movState
)
1872 movState
= std::unique_ptr
<MovieState
>(new MovieState(argv
[fileidx
++]));
1873 if(!movState
->prepare()) movState
= nullptr;
1877 movState
->setTitle(screen
);
1882 /* Nothing more to play. Shut everything down and quit. */
1885 alcMakeContextCurrent(nullptr);
1886 alcDestroyContext(context
);
1887 alcCloseDevice(device
);
1889 SDL_DestroyRenderer(renderer
);
1891 SDL_DestroyWindow(screen
);
1902 std::cerr
<< "SDL_WaitEvent error - "<<SDL_GetError() <<std::endl
;