2 * An example showing how to play a stream sync'd to video, using ffmpeg.
7 #include <condition_variable>
23 #include "libavcodec/avcodec.h"
24 #include "libavformat/avformat.h"
25 #include "libavformat/avio.h"
26 #include "libavutil/time.h"
27 #include "libavutil/pixfmt.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/channel_layout.h"
30 #include "libswscale/swscale.h"
31 #include "libswresample/swresample.h"
42 using nanoseconds
= std::chrono::nanoseconds
;
43 using microseconds
= std::chrono::microseconds
;
44 using milliseconds
= std::chrono::milliseconds
;
45 using seconds
= std::chrono::seconds
;
46 using seconds_d64
= std::chrono::duration
<double>;
48 const std::string
AppName("alffplay");
50 bool EnableDirectOut
= false;
51 LPALGETSOURCEI64VSOFT alGetSourcei64vSOFT
;
52 LPALCGETINTEGER64VSOFT alcGetInteger64vSOFT
;
54 const seconds
AVNoSyncThreshold(10);
56 const milliseconds
VideoSyncThreshold(10);
57 #define VIDEO_PICTURE_QUEUE_SIZE 16
59 const seconds_d64
AudioSyncThreshold(0.03);
60 const milliseconds
AudioSampleCorrectionMax(50);
61 /* Averaging filter coefficient for audio sync. */
62 #define AUDIO_DIFF_AVG_NB 20
63 const double AudioAvgFilterCoeff
= std::pow(0.01, 1.0/AUDIO_DIFF_AVG_NB
);
64 /* Per-buffer size, in time */
65 const milliseconds
AudioBufferTime(20);
66 /* Buffer total size, in time (should be divisible by the buffer time) */
67 const milliseconds
AudioBufferTotalTime(800);
69 #define MAX_QUEUE_SIZE (15 * 1024 * 1024) /* Bytes of compressed data to keep queued */
72 FF_UPDATE_EVENT
= SDL_USEREVENT
,
77 enum class SyncMaster
{
86 inline microseconds
get_avtime()
87 { return microseconds(av_gettime()); }
89 /* Define unique_ptrs to auto-cleanup associated ffmpeg objects. */
90 struct AVIOContextDeleter
{
91 void operator()(AVIOContext
*ptr
) { avio_closep(&ptr
); }
93 using AVIOContextPtr
= std::unique_ptr
<AVIOContext
,AVIOContextDeleter
>;
95 struct AVFormatCtxDeleter
{
96 void operator()(AVFormatContext
*ptr
) { avformat_close_input(&ptr
); }
98 using AVFormatCtxPtr
= std::unique_ptr
<AVFormatContext
,AVFormatCtxDeleter
>;
100 struct AVCodecCtxDeleter
{
101 void operator()(AVCodecContext
*ptr
) { avcodec_free_context(&ptr
); }
103 using AVCodecCtxPtr
= std::unique_ptr
<AVCodecContext
,AVCodecCtxDeleter
>;
105 struct AVFrameDeleter
{
106 void operator()(AVFrame
*ptr
) { av_frame_free(&ptr
); }
108 using AVFramePtr
= std::unique_ptr
<AVFrame
,AVFrameDeleter
>;
110 struct SwrContextDeleter
{
111 void operator()(SwrContext
*ptr
) { swr_free(&ptr
); }
113 using SwrContextPtr
= std::unique_ptr
<SwrContext
,SwrContextDeleter
>;
115 struct SwsContextDeleter
{
116 void operator()(SwsContext
*ptr
) { sws_freeContext(ptr
); }
118 using SwsContextPtr
= std::unique_ptr
<SwsContext
,SwsContextDeleter
>;
122 std::deque
<AVPacket
> mPackets
;
123 size_t mTotalSize
{0};
126 ~PacketQueue() { clear(); }
128 bool empty() const noexcept
{ return mPackets
.empty(); }
129 size_t totalSize() const noexcept
{ return mTotalSize
; }
131 void put(const AVPacket
*pkt
)
133 mPackets
.push_back(AVPacket
{});
134 if(av_packet_ref(&mPackets
.back(), pkt
) != 0)
137 mTotalSize
+= mPackets
.back().size
;
140 AVPacket
*front() noexcept
141 { return &mPackets
.front(); }
145 AVPacket
*pkt
= &mPackets
.front();
146 mTotalSize
-= pkt
->size
;
147 av_packet_unref(pkt
);
148 mPackets
.pop_front();
153 for(AVPacket
&pkt
: mPackets
)
154 av_packet_unref(&pkt
);
166 AVStream
*mStream
{nullptr};
167 AVCodecCtxPtr mCodecCtx
;
169 std::mutex mQueueMtx
;
170 std::condition_variable mQueueCond
;
172 /* Used for clock difference average computation */
173 seconds_d64 mClockDiffAvg
{0};
175 /* Time of the next sample to be buffered */
176 nanoseconds mCurrentPts
{0};
178 /* Device clock time that the stream started at. */
179 nanoseconds mDeviceStartTime
{nanoseconds::min()};
181 /* Decompressed sample frame, and swresample context for conversion */
182 AVFramePtr mDecodedFrame
;
183 SwrContextPtr mSwresCtx
;
185 /* Conversion format, for what gets fed to OpenAL */
186 int mDstChanLayout
{0};
187 AVSampleFormat mDstSampleFmt
{AV_SAMPLE_FMT_NONE
};
189 /* Storage of converted samples */
190 uint8_t *mSamples
{nullptr};
191 int mSamplesLen
{0}; /* In samples */
196 ALenum mFormat
{AL_NONE
};
197 ALsizei mFrameSize
{0};
199 std::mutex mSrcMutex
;
201 std::vector
<ALuint
> mBuffers
;
202 ALsizei mBufferIdx
{0};
204 AudioState(MovieState
&movie
) : mMovie(movie
)
209 alDeleteSources(1, &mSource
);
210 if(!mBuffers
.empty())
211 alDeleteBuffers(mBuffers
.size(), mBuffers
.data());
216 nanoseconds
getClockNoLock();
217 nanoseconds
getClock()
219 std::lock_guard
<std::mutex
> lock(mSrcMutex
);
220 return getClockNoLock();
223 bool isBufferFilled();
224 void startPlayback();
228 int readAudio(uint8_t *samples
, int length
);
236 AVStream
*mStream
{nullptr};
237 AVCodecCtxPtr mCodecCtx
;
239 std::mutex mQueueMtx
;
240 std::condition_variable mQueueCond
;
242 nanoseconds mClock
{0};
243 nanoseconds mFrameTimer
{0};
244 nanoseconds mFrameLastPts
{0};
245 nanoseconds mFrameLastDelay
{0};
246 nanoseconds mCurrentPts
{0};
247 /* time (av_gettime) at which we updated mCurrentPts - used to have running video pts */
248 microseconds mCurrentPtsTime
{0};
250 /* Decompressed video frame, and swscale context for conversion */
251 AVFramePtr mDecodedFrame
;
252 SwsContextPtr mSwscaleCtx
;
255 SDL_Texture
*mImage
{nullptr};
256 int mWidth
{0}, mHeight
{0}; /* Logical image size (actual size may be larger) */
257 std::atomic
<bool> mUpdated
{false};
263 SDL_DestroyTexture(mImage
);
267 std::array
<Picture
,VIDEO_PICTURE_QUEUE_SIZE
> mPictQ
;
268 size_t mPictQSize
{0}, mPictQRead
{0}, mPictQWrite
{0};
269 std::mutex mPictQMutex
;
270 std::condition_variable mPictQCond
;
271 bool mFirstUpdate
{true};
272 std::atomic
<bool> mEOS
{false};
273 std::atomic
<bool> mFinalUpdate
{false};
275 VideoState(MovieState
&movie
) : mMovie(movie
) { }
277 nanoseconds
getClock();
278 bool isBufferFilled();
280 static Uint32 SDLCALL
sdl_refresh_timer_cb(Uint32 interval
, void *opaque
);
281 void schedRefresh(milliseconds delay
);
282 void display(SDL_Window
*screen
, SDL_Renderer
*renderer
);
283 void refreshTimer(SDL_Window
*screen
, SDL_Renderer
*renderer
);
284 void updatePicture(SDL_Window
*screen
, SDL_Renderer
*renderer
);
285 int queuePicture(nanoseconds pts
);
290 AVIOContextPtr mIOContext
;
291 AVFormatCtxPtr mFormatCtx
;
293 SyncMaster mAVSyncType
{SyncMaster::Default
};
295 microseconds mClockBase
{0};
296 std::atomic
<bool> mPlaying
{false};
299 std::condition_variable mSendCond
;
300 /* NOTE: false/clear = need data, true/set = no data needed */
301 std::atomic_flag mSendDataGood
;
303 std::atomic
<bool> mQuit
{false};
308 std::thread mParseThread
;
309 std::thread mAudioThread
;
310 std::thread mVideoThread
;
312 std::string mFilename
;
314 MovieState(std::string fname
)
315 : mAudio(*this), mVideo(*this), mFilename(std::move(fname
))
320 if(mParseThread
.joinable())
324 static int decode_interrupt_cb(void *ctx
);
326 void setTitle(SDL_Window
*window
);
328 nanoseconds
getClock();
330 nanoseconds
getMasterClock();
332 nanoseconds
getDuration();
334 int streamComponentOpen(int stream_index
);
339 nanoseconds
AudioState::getClockNoLock()
341 // The audio clock is the timestamp of the sample currently being heard.
342 if(alcGetInteger64vSOFT
)
344 // If device start time = min, we aren't playing yet.
345 if(mDeviceStartTime
== nanoseconds::min())
346 return nanoseconds::zero();
348 // Get the current device clock time and latency.
349 auto device
= alcGetContextsDevice(alcGetCurrentContext());
350 ALCint64SOFT devtimes
[2] = {0,0};
351 alcGetInteger64vSOFT(device
, ALC_DEVICE_CLOCK_LATENCY_SOFT
, 2, devtimes
);
352 auto latency
= nanoseconds(devtimes
[1]);
353 auto device_time
= nanoseconds(devtimes
[0]);
355 // The clock is simply the current device time relative to the recorded
356 // start time. We can also subtract the latency to get more a accurate
357 // position of where the audio device actually is in the output stream.
358 return device_time
- mDeviceStartTime
- latency
;
361 /* The source-based clock is based on 4 components:
362 * 1 - The timestamp of the next sample to buffer (mCurrentPts)
363 * 2 - The length of the source's buffer queue
364 * (AudioBufferTime*AL_BUFFERS_QUEUED)
365 * 3 - The offset OpenAL is currently at in the source (the first value
366 * from AL_SAMPLE_OFFSET_LATENCY_SOFT)
367 * 4 - The latency between OpenAL and the DAC (the second value from
368 * AL_SAMPLE_OFFSET_LATENCY_SOFT)
370 * Subtracting the length of the source queue from the next sample's
371 * timestamp gives the timestamp of the sample at the start of the source
372 * queue. Adding the source offset to that results in the timestamp for the
373 * sample at OpenAL's current position, and subtracting the source latency
374 * from that gives the timestamp of the sample currently at the DAC.
376 nanoseconds pts
= mCurrentPts
;
379 ALint64SOFT offset
[2];
383 /* NOTE: The source state must be checked last, in case an underrun
384 * occurs and the source stops between retrieving the offset+latency
385 * and getting the state. */
386 if(alGetSourcei64vSOFT
)
387 alGetSourcei64vSOFT(mSource
, AL_SAMPLE_OFFSET_LATENCY_SOFT
, offset
);
391 alGetSourcei(mSource
, AL_SAMPLE_OFFSET
, &ioffset
);
392 offset
[0] = (ALint64SOFT
)ioffset
<< 32;
395 alGetSourcei(mSource
, AL_BUFFERS_QUEUED
, &queued
);
396 alGetSourcei(mSource
, AL_SOURCE_STATE
, &status
);
398 /* If the source is AL_STOPPED, then there was an underrun and all
399 * buffers are processed, so ignore the source queue. The audio thread
400 * will put the source into an AL_INITIAL state and clear the queue
401 * when it starts recovery. */
402 if(status
!= AL_STOPPED
)
404 using fixed32
= std::chrono::duration
<int64_t,std::ratio
<1,(1ll<<32)>>;
406 pts
-= AudioBufferTime
*queued
;
407 pts
+= std::chrono::duration_cast
<nanoseconds
>(
408 fixed32(offset
[0] / mCodecCtx
->sample_rate
)
411 /* Don't offset by the latency if the source isn't playing. */
412 if(status
== AL_PLAYING
)
413 pts
-= nanoseconds(offset
[1]);
416 return std::max(pts
, nanoseconds::zero());
419 bool AudioState::isBufferFilled()
421 /* All of OpenAL's buffer queueing happens under the mSrcMutex lock, as
422 * does the source gen. So when we're able to grab the lock and the source
423 * is valid, the queue must be full.
425 std::lock_guard
<std::mutex
> lock(mSrcMutex
);
429 void AudioState::startPlayback()
431 alSourcePlay(mSource
);
432 if(alcGetInteger64vSOFT
)
434 using fixed32
= std::chrono::duration
<int64_t,std::ratio
<1,(1ll<<32)>>;
436 // Subtract the total buffer queue time from the current pts to get the
437 // pts of the start of the queue.
438 nanoseconds startpts
= mCurrentPts
- AudioBufferTotalTime
;
439 int64_t srctimes
[2]={0,0};
440 alGetSourcei64vSOFT(mSource
, AL_SAMPLE_OFFSET_CLOCK_SOFT
, srctimes
);
441 auto device_time
= nanoseconds(srctimes
[1]);
442 auto src_offset
= std::chrono::duration_cast
<nanoseconds
>(fixed32(srctimes
[0])) /
443 mCodecCtx
->sample_rate
;
445 // The mixer may have ticked and incremented the device time and sample
446 // offset, so subtract the source offset from the device time to get
447 // the device time the source started at. Also subtract startpts to get
448 // the device time the stream would have started at to reach where it
450 mDeviceStartTime
= device_time
- src_offset
- startpts
;
454 int AudioState::getSync()
456 if(mMovie
.mAVSyncType
== SyncMaster::Audio
)
459 auto ref_clock
= mMovie
.getMasterClock();
460 auto diff
= ref_clock
- getClockNoLock();
462 if(!(diff
< AVNoSyncThreshold
&& diff
> -AVNoSyncThreshold
))
464 /* Difference is TOO big; reset accumulated average */
465 mClockDiffAvg
= seconds_d64::zero();
469 /* Accumulate the diffs */
470 mClockDiffAvg
= mClockDiffAvg
*AudioAvgFilterCoeff
+ diff
;
471 auto avg_diff
= mClockDiffAvg
*(1.0 - AudioAvgFilterCoeff
);
472 if(avg_diff
< AudioSyncThreshold
/2.0 && avg_diff
> -AudioSyncThreshold
)
475 /* Constrain the per-update difference to avoid exceedingly large skips */
476 diff
= std::min
<nanoseconds
>(std::max
<nanoseconds
>(diff
, -AudioSampleCorrectionMax
),
477 AudioSampleCorrectionMax
);
478 return (int)std::chrono::duration_cast
<seconds
>(diff
*mCodecCtx
->sample_rate
).count();
481 int AudioState::decodeFrame()
483 while(!mMovie
.mQuit
.load(std::memory_order_relaxed
))
485 std::unique_lock
<std::mutex
> lock(mQueueMtx
);
486 int ret
= avcodec_receive_frame(mCodecCtx
.get(), mDecodedFrame
.get());
487 if(ret
== AVERROR(EAGAIN
))
489 mMovie
.mSendDataGood
.clear(std::memory_order_relaxed
);
490 std::unique_lock
<std::mutex
>(mMovie
.mSendMtx
).unlock();
491 mMovie
.mSendCond
.notify_one();
493 mQueueCond
.wait(lock
);
494 ret
= avcodec_receive_frame(mCodecCtx
.get(), mDecodedFrame
.get());
495 } while(ret
== AVERROR(EAGAIN
));
498 if(ret
== AVERROR_EOF
) break;
499 mMovie
.mSendDataGood
.clear(std::memory_order_relaxed
);
500 mMovie
.mSendCond
.notify_one();
503 std::cerr
<< "Failed to decode frame: "<<ret
<<std::endl
;
507 if(mDecodedFrame
->nb_samples
<= 0)
509 av_frame_unref(mDecodedFrame
.get());
513 /* If provided, update w/ pts */
514 if(mDecodedFrame
->best_effort_timestamp
!= AV_NOPTS_VALUE
)
515 mCurrentPts
= std::chrono::duration_cast
<nanoseconds
>(
516 seconds_d64(av_q2d(mStream
->time_base
)*mDecodedFrame
->best_effort_timestamp
)
519 if(mDecodedFrame
->nb_samples
> mSamplesMax
)
523 &mSamples
, nullptr, mCodecCtx
->channels
,
524 mDecodedFrame
->nb_samples
, mDstSampleFmt
, 0
526 mSamplesMax
= mDecodedFrame
->nb_samples
;
528 /* Return the amount of sample frames converted */
529 int data_size
= swr_convert(mSwresCtx
.get(), &mSamples
, mDecodedFrame
->nb_samples
,
530 (const uint8_t**)mDecodedFrame
->data
, mDecodedFrame
->nb_samples
533 av_frame_unref(mDecodedFrame
.get());
540 /* Duplicates the sample at in to out, count times. The frame size is a
541 * multiple of the template type size.
544 static void sample_dup(uint8_t *out
, const uint8_t *in
, int count
, int frame_size
)
546 const T
*sample
= reinterpret_cast<const T
*>(in
);
547 T
*dst
= reinterpret_cast<T
*>(out
);
548 if(frame_size
== sizeof(T
))
549 std::fill_n(dst
, count
, *sample
);
552 /* NOTE: frame_size is a multiple of sizeof(T). */
553 int type_mult
= frame_size
/ sizeof(T
);
555 std::generate_n(dst
, count
*type_mult
,
556 [sample
,type_mult
,&i
]() -> T
567 int AudioState::readAudio(uint8_t *samples
, int length
)
569 int sample_skip
= getSync();
572 /* Read the next chunk of data, refill the buffer, and queue it
574 length
/= mFrameSize
;
575 while(audio_size
< length
)
577 if(mSamplesLen
<= 0 || mSamplesPos
>= mSamplesLen
)
579 int frame_len
= decodeFrame();
580 if(frame_len
<= 0) break;
582 mSamplesLen
= frame_len
;
583 mSamplesPos
= std::min(mSamplesLen
, sample_skip
);
584 sample_skip
-= mSamplesPos
;
586 // Adjust the device start time and current pts by the amount we're
587 // skipping/duplicating, so that the clock remains correct for the
588 // current stream position.
589 auto skip
= nanoseconds(seconds(mSamplesPos
)) / mCodecCtx
->sample_rate
;
590 mDeviceStartTime
-= skip
;
595 int rem
= length
- audio_size
;
598 int len
= mSamplesLen
- mSamplesPos
;
599 if(rem
> len
) rem
= len
;
600 memcpy(samples
, mSamples
+ mSamplesPos
*mFrameSize
, rem
*mFrameSize
);
604 rem
= std::min(rem
, -mSamplesPos
);
606 /* Add samples by copying the first sample */
607 if((mFrameSize
&7) == 0)
608 sample_dup
<uint64_t>(samples
, mSamples
, rem
, mFrameSize
);
609 else if((mFrameSize
&3) == 0)
610 sample_dup
<uint32_t>(samples
, mSamples
, rem
, mFrameSize
);
611 else if((mFrameSize
&1) == 0)
612 sample_dup
<uint16_t>(samples
, mSamples
, rem
, mFrameSize
);
614 sample_dup
<uint8_t>(samples
, mSamples
, rem
, mFrameSize
);
618 mCurrentPts
+= nanoseconds(seconds(rem
)) / mCodecCtx
->sample_rate
;
619 samples
+= rem
*mFrameSize
;
623 if(audio_size
< length
&& audio_size
> 0)
625 int rem
= length
- audio_size
;
626 std::fill_n(samples
, rem
*mFrameSize
,
627 (mDstSampleFmt
== AV_SAMPLE_FMT_U8
) ? 0x80 : 0x00);
628 mCurrentPts
+= nanoseconds(seconds(rem
)) / mCodecCtx
->sample_rate
;
632 return audio_size
* mFrameSize
;
636 int AudioState::handler()
638 std::unique_lock
<std::mutex
> lock(mSrcMutex
);
641 /* Find a suitable format for OpenAL. */
643 if(mCodecCtx
->sample_fmt
== AV_SAMPLE_FMT_U8
|| mCodecCtx
->sample_fmt
== AV_SAMPLE_FMT_U8P
)
645 mDstSampleFmt
= AV_SAMPLE_FMT_U8
;
647 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_7POINT1
&&
648 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
649 (fmt
=alGetEnumValue("AL_FORMAT_71CHN8")) != AL_NONE
&& fmt
!= -1)
651 mDstChanLayout
= mCodecCtx
->channel_layout
;
655 if((mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1
||
656 mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1_BACK
) &&
657 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
658 (fmt
=alGetEnumValue("AL_FORMAT_51CHN8")) != AL_NONE
&& fmt
!= -1)
660 mDstChanLayout
= mCodecCtx
->channel_layout
;
664 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_MONO
)
666 mDstChanLayout
= mCodecCtx
->channel_layout
;
668 mFormat
= AL_FORMAT_MONO8
;
672 mDstChanLayout
= AV_CH_LAYOUT_STEREO
;
674 mFormat
= AL_FORMAT_STEREO8
;
677 if((mCodecCtx
->sample_fmt
== AV_SAMPLE_FMT_FLT
|| mCodecCtx
->sample_fmt
== AV_SAMPLE_FMT_FLTP
) &&
678 alIsExtensionPresent("AL_EXT_FLOAT32"))
680 mDstSampleFmt
= AV_SAMPLE_FMT_FLT
;
682 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_7POINT1
&&
683 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
684 (fmt
=alGetEnumValue("AL_FORMAT_71CHN32")) != AL_NONE
&& fmt
!= -1)
686 mDstChanLayout
= mCodecCtx
->channel_layout
;
690 if((mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1
||
691 mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1_BACK
) &&
692 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
693 (fmt
=alGetEnumValue("AL_FORMAT_51CHN32")) != AL_NONE
&& fmt
!= -1)
695 mDstChanLayout
= mCodecCtx
->channel_layout
;
699 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_MONO
)
701 mDstChanLayout
= mCodecCtx
->channel_layout
;
703 mFormat
= AL_FORMAT_MONO_FLOAT32
;
707 mDstChanLayout
= AV_CH_LAYOUT_STEREO
;
709 mFormat
= AL_FORMAT_STEREO_FLOAT32
;
714 mDstSampleFmt
= AV_SAMPLE_FMT_S16
;
716 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_7POINT1
&&
717 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
718 (fmt
=alGetEnumValue("AL_FORMAT_71CHN16")) != AL_NONE
&& fmt
!= -1)
720 mDstChanLayout
= mCodecCtx
->channel_layout
;
724 if((mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1
||
725 mCodecCtx
->channel_layout
== AV_CH_LAYOUT_5POINT1_BACK
) &&
726 alIsExtensionPresent("AL_EXT_MCFORMATS") &&
727 (fmt
=alGetEnumValue("AL_FORMAT_51CHN16")) != AL_NONE
&& fmt
!= -1)
729 mDstChanLayout
= mCodecCtx
->channel_layout
;
733 if(mCodecCtx
->channel_layout
== AV_CH_LAYOUT_MONO
)
735 mDstChanLayout
= mCodecCtx
->channel_layout
;
737 mFormat
= AL_FORMAT_MONO16
;
741 mDstChanLayout
= AV_CH_LAYOUT_STEREO
;
743 mFormat
= AL_FORMAT_STEREO16
;
746 ALsizei buffer_len
= std::chrono::duration_cast
<std::chrono::duration
<int>>(
747 mCodecCtx
->sample_rate
* AudioBufferTime
).count() * mFrameSize
;
748 void *samples
= av_malloc(buffer_len
);
755 mDecodedFrame
.reset(av_frame_alloc());
758 std::cerr
<< "Failed to allocate audio frame" <<std::endl
;
762 mSwresCtx
.reset(swr_alloc_set_opts(nullptr,
763 mDstChanLayout
, mDstSampleFmt
, mCodecCtx
->sample_rate
,
764 mCodecCtx
->channel_layout
? mCodecCtx
->channel_layout
:
765 (uint64_t)av_get_default_channel_layout(mCodecCtx
->channels
),
766 mCodecCtx
->sample_fmt
, mCodecCtx
->sample_rate
,
769 if(!mSwresCtx
|| swr_init(mSwresCtx
.get()) != 0)
771 std::cerr
<< "Failed to initialize audio converter" <<std::endl
;
775 mBuffers
.assign(AudioBufferTotalTime
/ AudioBufferTime
, 0);
776 alGenBuffers(mBuffers
.size(), mBuffers
.data());
777 alGenSources(1, &mSource
);
780 alSourcei(mSource
, AL_DIRECT_CHANNELS_SOFT
, AL_TRUE
);
782 while(alGetError() == AL_NO_ERROR
&& !mMovie
.mQuit
.load(std::memory_order_relaxed
))
784 /* First remove any processed buffers. */
786 alGetSourcei(mSource
, AL_BUFFERS_PROCESSED
, &processed
);
789 std::array
<ALuint
,4> bids
;
790 alSourceUnqueueBuffers(mSource
, std::min
<ALsizei
>(bids
.size(), processed
),
792 processed
-= std::min
<ALsizei
>(bids
.size(), processed
);
795 /* Refill the buffer queue. */
797 alGetSourcei(mSource
, AL_BUFFERS_QUEUED
, &queued
);
798 while((ALuint
)queued
< mBuffers
.size())
802 /* Read the next chunk of data, fill the buffer, and queue it on
804 audio_size
= readAudio(reinterpret_cast<uint8_t*>(samples
), buffer_len
);
805 if(audio_size
<= 0) break;
807 ALuint bufid
= mBuffers
[mBufferIdx
++];
808 mBufferIdx
%= mBuffers
.size();
810 alBufferData(bufid
, mFormat
, samples
, audio_size
, mCodecCtx
->sample_rate
);
811 alSourceQueueBuffers(mSource
, 1, &bufid
);
817 /* Check that the source is playing. */
819 alGetSourcei(mSource
, AL_SOURCE_STATE
, &state
);
820 if(state
== AL_STOPPED
)
822 /* AL_STOPPED means there was an underrun. Clear the buffer queue
823 * since this likely means we're late, and rewind the source to get
824 * it back into an AL_INITIAL state.
826 alSourceRewind(mSource
);
827 alSourcei(mSource
, AL_BUFFER
, 0);
831 /* (re)start the source if needed, and wait for a buffer to finish */
832 if(state
!= AL_PLAYING
&& state
!= AL_PAUSED
&&
833 mMovie
.mPlaying
.load(std::memory_order_relaxed
))
837 SDL_Delay((AudioBufferTime
/3).count());
841 alSourceRewind(mSource
);
842 alSourcei(mSource
, AL_BUFFER
, 0);
851 nanoseconds
VideoState::getClock()
853 /* NOTE: This returns incorrect times while not playing. */
854 auto delta
= get_avtime() - mCurrentPtsTime
;
855 return mCurrentPts
+ delta
;
858 bool VideoState::isBufferFilled()
860 std::unique_lock
<std::mutex
> lock(mPictQMutex
);
861 return mPictQSize
>= mPictQ
.size();
864 Uint32 SDLCALL
VideoState::sdl_refresh_timer_cb(Uint32
/*interval*/, void *opaque
)
867 evt
.user
.type
= FF_REFRESH_EVENT
;
868 evt
.user
.data1
= opaque
;
870 return 0; /* 0 means stop timer */
873 /* Schedules an FF_REFRESH_EVENT event to occur in 'delay' ms. */
874 void VideoState::schedRefresh(milliseconds delay
)
876 SDL_AddTimer(delay
.count(), sdl_refresh_timer_cb
, this);
879 /* Called by VideoState::refreshTimer to display the next video frame. */
880 void VideoState::display(SDL_Window
*screen
, SDL_Renderer
*renderer
)
882 Picture
*vp
= &mPictQ
[mPictQRead
];
891 if(mCodecCtx
->sample_aspect_ratio
.num
== 0)
895 aspect_ratio
= av_q2d(mCodecCtx
->sample_aspect_ratio
) * mCodecCtx
->width
/
898 if(aspect_ratio
<= 0.0f
)
899 aspect_ratio
= (float)mCodecCtx
->width
/ (float)mCodecCtx
->height
;
901 SDL_GetWindowSize(screen
, &win_w
, &win_h
);
903 w
= ((int)rint(h
* aspect_ratio
) + 3) & ~3;
907 h
= ((int)rint(w
/ aspect_ratio
) + 3) & ~3;
912 SDL_Rect src_rect
{ 0, 0, vp
->mWidth
, vp
->mHeight
};
913 SDL_Rect dst_rect
{ x
, y
, w
, h
};
914 SDL_RenderCopy(renderer
, vp
->mImage
, &src_rect
, &dst_rect
);
915 SDL_RenderPresent(renderer
);
918 /* FF_REFRESH_EVENT handler called on the main thread where the SDL_Renderer
919 * was created. It handles the display of the next decoded video frame (if not
920 * falling behind), and sets up the timer for the following video frame.
922 void VideoState::refreshTimer(SDL_Window
*screen
, SDL_Renderer
*renderer
)
929 std::unique_lock
<std::mutex
>(mPictQMutex
).unlock();
930 mPictQCond
.notify_all();
933 schedRefresh(milliseconds(100));
936 if(!mMovie
.mPlaying
.load(std::memory_order_relaxed
))
938 schedRefresh(milliseconds(1));
942 std::unique_lock
<std::mutex
> lock(mPictQMutex
);
949 schedRefresh(milliseconds(1));
951 mPictQCond
.notify_all();
955 Picture
*vp
= &mPictQ
[mPictQRead
];
956 mCurrentPts
= vp
->mPts
;
957 mCurrentPtsTime
= get_avtime();
959 /* Get delay using the frame pts and the pts from last frame. */
960 auto delay
= vp
->mPts
- mFrameLastPts
;
961 if(delay
<= seconds::zero() || delay
>= seconds(1))
963 /* If incorrect delay, use previous one. */
964 delay
= mFrameLastDelay
;
966 /* Save for next frame. */
967 mFrameLastDelay
= delay
;
968 mFrameLastPts
= vp
->mPts
;
970 /* Update delay to sync to clock if not master source. */
971 if(mMovie
.mAVSyncType
!= SyncMaster::Video
)
973 auto ref_clock
= mMovie
.getMasterClock();
974 auto diff
= vp
->mPts
- ref_clock
;
976 /* Skip or repeat the frame. Take delay into account. */
977 auto sync_threshold
= std::min
<nanoseconds
>(delay
, VideoSyncThreshold
);
978 if(!(diff
< AVNoSyncThreshold
&& diff
> -AVNoSyncThreshold
))
980 if(diff
<= -sync_threshold
)
981 delay
= nanoseconds::zero();
982 else if(diff
>= sync_threshold
)
987 mFrameTimer
+= delay
;
988 /* Compute the REAL delay. */
989 auto actual_delay
= mFrameTimer
- get_avtime();
990 if(!(actual_delay
>= VideoSyncThreshold
))
992 /* We don't have time to handle this picture, just skip to the next one. */
993 mPictQRead
= (mPictQRead
+1)%mPictQ
.size();
997 schedRefresh(std::chrono::duration_cast
<milliseconds
>(actual_delay
));
999 /* Show the picture! */
1000 display(screen
, renderer
);
1002 /* Update queue for next picture. */
1003 mPictQRead
= (mPictQRead
+1)%mPictQ
.size();
1006 mPictQCond
.notify_all();
1009 /* FF_UPDATE_EVENT handler, updates the picture's texture. It's called on the
1010 * main thread where the renderer was created.
1012 void VideoState::updatePicture(SDL_Window
*screen
, SDL_Renderer
*renderer
)
1014 Picture
*vp
= &mPictQ
[mPictQWrite
];
1015 bool fmt_updated
= false;
1017 /* allocate or resize the buffer! */
1018 if(!vp
->mImage
|| vp
->mWidth
!= mCodecCtx
->width
|| vp
->mHeight
!= mCodecCtx
->height
)
1022 SDL_DestroyTexture(vp
->mImage
);
1023 vp
->mImage
= SDL_CreateTexture(
1024 renderer
, SDL_PIXELFORMAT_IYUV
, SDL_TEXTUREACCESS_STREAMING
,
1025 mCodecCtx
->coded_width
, mCodecCtx
->coded_height
1028 std::cerr
<< "Failed to create YV12 texture!" <<std::endl
;
1029 vp
->mWidth
= mCodecCtx
->width
;
1030 vp
->mHeight
= mCodecCtx
->height
;
1032 if(mFirstUpdate
&& vp
->mWidth
> 0 && vp
->mHeight
> 0)
1034 /* For the first update, set the window size to the video size. */
1035 mFirstUpdate
= false;
1038 int h
= vp
->mHeight
;
1039 if(mCodecCtx
->sample_aspect_ratio
.den
!= 0)
1041 double aspect_ratio
= av_q2d(mCodecCtx
->sample_aspect_ratio
);
1042 if(aspect_ratio
>= 1.0)
1043 w
= (int)(w
*aspect_ratio
+ 0.5);
1044 else if(aspect_ratio
> 0.0)
1045 h
= (int)(h
/aspect_ratio
+ 0.5);
1047 SDL_SetWindowSize(screen
, w
, h
);
1053 AVFrame
*frame
= mDecodedFrame
.get();
1054 void *pixels
= nullptr;
1057 if(mCodecCtx
->pix_fmt
== AV_PIX_FMT_YUV420P
)
1058 SDL_UpdateYUVTexture(vp
->mImage
, nullptr,
1059 frame
->data
[0], frame
->linesize
[0],
1060 frame
->data
[1], frame
->linesize
[1],
1061 frame
->data
[2], frame
->linesize
[2]
1063 else if(SDL_LockTexture(vp
->mImage
, nullptr, &pixels
, &pitch
) != 0)
1064 std::cerr
<< "Failed to lock texture" <<std::endl
;
1067 // Convert the image into YUV format that SDL uses
1068 int coded_w
= mCodecCtx
->coded_width
;
1069 int coded_h
= mCodecCtx
->coded_height
;
1070 int w
= mCodecCtx
->width
;
1071 int h
= mCodecCtx
->height
;
1072 if(!mSwscaleCtx
|| fmt_updated
)
1074 mSwscaleCtx
.reset(sws_getContext(
1075 w
, h
, mCodecCtx
->pix_fmt
,
1076 w
, h
, AV_PIX_FMT_YUV420P
, 0,
1077 nullptr, nullptr, nullptr
1081 /* point pict at the queue */
1082 uint8_t *pict_data
[3];
1083 pict_data
[0] = reinterpret_cast<uint8_t*>(pixels
);
1084 pict_data
[1] = pict_data
[0] + coded_w
*coded_h
;
1085 pict_data
[2] = pict_data
[1] + coded_w
*coded_h
/4;
1087 int pict_linesize
[3];
1088 pict_linesize
[0] = pitch
;
1089 pict_linesize
[1] = pitch
/ 2;
1090 pict_linesize
[2] = pitch
/ 2;
1092 sws_scale(mSwscaleCtx
.get(), (const uint8_t**)frame
->data
,
1093 frame
->linesize
, 0, h
, pict_data
, pict_linesize
);
1094 SDL_UnlockTexture(vp
->mImage
);
1098 vp
->mUpdated
.store(true, std::memory_order_release
);
1099 std::unique_lock
<std::mutex
>(mPictQMutex
).unlock();
1100 mPictQCond
.notify_one();
1103 int VideoState::queuePicture(nanoseconds pts
)
1105 /* Wait until we have space for a new pic */
1106 std::unique_lock
<std::mutex
> lock(mPictQMutex
);
1107 while(mPictQSize
>= mPictQ
.size() && !mMovie
.mQuit
.load(std::memory_order_relaxed
))
1108 mPictQCond
.wait(lock
);
1111 if(mMovie
.mQuit
.load(std::memory_order_relaxed
))
1114 Picture
*vp
= &mPictQ
[mPictQWrite
];
1116 /* We have to create/update the picture in the main thread */
1117 vp
->mUpdated
.store(false, std::memory_order_relaxed
);
1119 evt
.user
.type
= FF_UPDATE_EVENT
;
1120 evt
.user
.data1
= this;
1121 SDL_PushEvent(&evt
);
1123 /* Wait until the picture is updated. */
1125 while(!vp
->mUpdated
.load(std::memory_order_relaxed
))
1127 if(mMovie
.mQuit
.load(std::memory_order_relaxed
))
1129 mPictQCond
.wait(lock
);
1131 if(mMovie
.mQuit
.load(std::memory_order_relaxed
))
1135 mPictQWrite
= (mPictQWrite
+1)%mPictQ
.size();
1142 int VideoState::handler()
1144 mDecodedFrame
.reset(av_frame_alloc());
1145 while(!mMovie
.mQuit
.load(std::memory_order_relaxed
))
1147 std::unique_lock
<std::mutex
> lock(mQueueMtx
);
1148 /* Decode video frame */
1149 int ret
= avcodec_receive_frame(mCodecCtx
.get(), mDecodedFrame
.get());
1150 if(ret
== AVERROR(EAGAIN
))
1152 mMovie
.mSendDataGood
.clear(std::memory_order_relaxed
);
1153 std::unique_lock
<std::mutex
>(mMovie
.mSendMtx
).unlock();
1154 mMovie
.mSendCond
.notify_one();
1156 mQueueCond
.wait(lock
);
1157 ret
= avcodec_receive_frame(mCodecCtx
.get(), mDecodedFrame
.get());
1158 } while(ret
== AVERROR(EAGAIN
));
1161 if(ret
== AVERROR_EOF
) break;
1162 mMovie
.mSendDataGood
.clear(std::memory_order_relaxed
);
1163 mMovie
.mSendCond
.notify_one();
1166 std::cerr
<< "Failed to decode frame: "<<ret
<<std::endl
;
1170 /* Get the PTS for this frame. */
1172 if(mDecodedFrame
->best_effort_timestamp
!= AV_NOPTS_VALUE
)
1173 mClock
= std::chrono::duration_cast
<nanoseconds
>(
1174 seconds_d64(av_q2d(mStream
->time_base
)*mDecodedFrame
->best_effort_timestamp
)
1178 /* Update the video clock to the next expected PTS. */
1179 auto frame_delay
= av_q2d(mCodecCtx
->time_base
);
1180 frame_delay
+= mDecodedFrame
->repeat_pict
* (frame_delay
* 0.5);
1181 mClock
+= std::chrono::duration_cast
<nanoseconds
>(seconds_d64(frame_delay
));
1183 if(queuePicture(pts
) < 0)
1185 av_frame_unref(mDecodedFrame
.get());
1189 std::unique_lock
<std::mutex
> lock(mPictQMutex
);
1190 if(mMovie
.mQuit
.load(std::memory_order_relaxed
))
1196 while(!mFinalUpdate
)
1197 mPictQCond
.wait(lock
);
1203 int MovieState::decode_interrupt_cb(void *ctx
)
1205 return reinterpret_cast<MovieState
*>(ctx
)->mQuit
.load(std::memory_order_relaxed
);
1208 bool MovieState::prepare()
1210 AVIOContext
*avioctx
= nullptr;
1211 AVIOInterruptCB intcb
= { decode_interrupt_cb
, this };
1212 if(avio_open2(&avioctx
, mFilename
.c_str(), AVIO_FLAG_READ
, &intcb
, nullptr))
1214 std::cerr
<< "Failed to open "<<mFilename
<<std::endl
;
1217 mIOContext
.reset(avioctx
);
1219 /* Open movie file. If avformat_open_input fails it will automatically free
1220 * this context, so don't set it onto a smart pointer yet.
1222 AVFormatContext
*fmtctx
= avformat_alloc_context();
1223 fmtctx
->pb
= mIOContext
.get();
1224 fmtctx
->interrupt_callback
= intcb
;
1225 if(avformat_open_input(&fmtctx
, mFilename
.c_str(), nullptr, nullptr) != 0)
1227 std::cerr
<< "Failed to open "<<mFilename
<<std::endl
;
1230 mFormatCtx
.reset(fmtctx
);
1232 /* Retrieve stream information */
1233 if(avformat_find_stream_info(mFormatCtx
.get(), nullptr) < 0)
1235 std::cerr
<< mFilename
<<": failed to find stream info" <<std::endl
;
1239 mVideo
.schedRefresh(milliseconds(40));
1241 mParseThread
= std::thread(std::mem_fn(&MovieState::parse_handler
), this);
1245 void MovieState::setTitle(SDL_Window
*window
)
1247 auto pos1
= mFilename
.rfind('/');
1248 auto pos2
= mFilename
.rfind('\\');
1249 auto fpos
= ((pos1
== std::string::npos
) ? pos2
:
1250 (pos2
== std::string::npos
) ? pos1
:
1251 std::max(pos1
, pos2
)) + 1;
1252 SDL_SetWindowTitle(window
, (mFilename
.substr(fpos
)+" - "+AppName
).c_str());
1255 nanoseconds
MovieState::getClock()
1257 if(!mPlaying
.load(std::memory_order_relaxed
))
1258 return nanoseconds::zero();
1259 return get_avtime() - mClockBase
;
1262 nanoseconds
MovieState::getMasterClock()
1264 if(mAVSyncType
== SyncMaster::Video
)
1265 return mVideo
.getClock();
1266 if(mAVSyncType
== SyncMaster::Audio
)
1267 return mAudio
.getClock();
1271 nanoseconds
MovieState::getDuration()
1272 { return std::chrono::duration
<int64_t,std::ratio
<1,AV_TIME_BASE
>>(mFormatCtx
->duration
); }
1274 int MovieState::streamComponentOpen(int stream_index
)
1276 if(stream_index
< 0 || (unsigned int)stream_index
>= mFormatCtx
->nb_streams
)
1279 /* Get a pointer to the codec context for the stream, and open the
1282 AVCodecCtxPtr
avctx(avcodec_alloc_context3(nullptr));
1283 if(!avctx
) return -1;
1285 if(avcodec_parameters_to_context(avctx
.get(), mFormatCtx
->streams
[stream_index
]->codecpar
))
1288 AVCodec
*codec
= avcodec_find_decoder(avctx
->codec_id
);
1289 if(!codec
|| avcodec_open2(avctx
.get(), codec
, nullptr) < 0)
1291 std::cerr
<< "Unsupported codec: "<<avcodec_get_name(avctx
->codec_id
)
1292 << " (0x"<<std::hex
<<avctx
->codec_id
<<std::dec
<<")" <<std::endl
;
1296 /* Initialize and start the media type handler */
1297 switch(avctx
->codec_type
)
1299 case AVMEDIA_TYPE_AUDIO
:
1300 mAudio
.mStream
= mFormatCtx
->streams
[stream_index
];
1301 mAudio
.mCodecCtx
= std::move(avctx
);
1303 mAudioThread
= std::thread(std::mem_fn(&AudioState::handler
), &mAudio
);
1306 case AVMEDIA_TYPE_VIDEO
:
1307 mVideo
.mStream
= mFormatCtx
->streams
[stream_index
];
1308 mVideo
.mCodecCtx
= std::move(avctx
);
1310 mVideoThread
= std::thread(std::mem_fn(&VideoState::handler
), &mVideo
);
1317 return stream_index
;
1320 int MovieState::parse_handler()
1322 int video_index
= -1;
1323 int audio_index
= -1;
1325 /* Dump information about file onto standard error */
1326 av_dump_format(mFormatCtx
.get(), 0, mFilename
.c_str(), 0);
1328 /* Find the first video and audio streams */
1329 for(unsigned int i
= 0;i
< mFormatCtx
->nb_streams
;i
++)
1331 auto codecpar
= mFormatCtx
->streams
[i
]->codecpar
;
1332 if(codecpar
->codec_type
== AVMEDIA_TYPE_VIDEO
&& video_index
< 0)
1333 video_index
= streamComponentOpen(i
);
1334 else if(codecpar
->codec_type
== AVMEDIA_TYPE_AUDIO
&& audio_index
< 0)
1335 audio_index
= streamComponentOpen(i
);
1338 if(video_index
< 0 && audio_index
< 0)
1340 std::cerr
<< mFilename
<<": could not open codecs" <<std::endl
;
1344 PacketQueue audio_queue
, video_queue
;
1345 bool input_finished
= false;
1347 /* Main packet reading/dispatching loop */
1348 while(!mQuit
.load(std::memory_order_relaxed
) && !input_finished
)
1351 if(av_read_frame(mFormatCtx
.get(), &packet
) < 0)
1352 input_finished
= true;
1355 /* Copy the packet into the queue it's meant for. */
1356 if(packet
.stream_index
== video_index
)
1357 video_queue
.put(&packet
);
1358 else if(packet
.stream_index
== audio_index
)
1359 audio_queue
.put(&packet
);
1360 av_packet_unref(&packet
);
1364 /* Send whatever queued packets we have. */
1365 if(!audio_queue
.empty())
1367 std::unique_lock
<std::mutex
> lock(mAudio
.mQueueMtx
);
1370 ret
= avcodec_send_packet(mAudio
.mCodecCtx
.get(), audio_queue
.front());
1371 if(ret
!= AVERROR(EAGAIN
)) audio_queue
.pop();
1372 } while(ret
!= AVERROR(EAGAIN
) && !audio_queue
.empty());
1374 mAudio
.mQueueCond
.notify_one();
1376 if(!video_queue
.empty())
1378 std::unique_lock
<std::mutex
> lock(mVideo
.mQueueMtx
);
1381 ret
= avcodec_send_packet(mVideo
.mCodecCtx
.get(), video_queue
.front());
1382 if(ret
!= AVERROR(EAGAIN
)) video_queue
.pop();
1383 } while(ret
!= AVERROR(EAGAIN
) && !video_queue
.empty());
1385 mVideo
.mQueueCond
.notify_one();
1387 /* If the queues are completely empty, or it's not full and there's
1388 * more input to read, go get more.
1390 size_t queue_size
= audio_queue
.totalSize() + video_queue
.totalSize();
1391 if(queue_size
== 0 || (queue_size
< MAX_QUEUE_SIZE
&& !input_finished
))
1394 if(!mPlaying
.load(std::memory_order_relaxed
))
1396 if((!mAudio
.mCodecCtx
|| mAudio
.isBufferFilled()) &&
1397 (!mVideo
.mCodecCtx
|| mVideo
.isBufferFilled()))
1399 /* Set the base time 50ms ahead of the current av time. */
1400 mClockBase
= get_avtime() + milliseconds(50);
1401 mVideo
.mCurrentPtsTime
= mClockBase
;
1402 mVideo
.mFrameTimer
= mVideo
.mCurrentPtsTime
;
1403 mAudio
.startPlayback();
1404 mPlaying
.store(std::memory_order_release
);
1407 /* Nothing to send or get for now, wait a bit and try again. */
1408 { std::unique_lock
<std::mutex
> lock(mSendMtx
);
1409 if(mSendDataGood
.test_and_set(std::memory_order_relaxed
))
1410 mSendCond
.wait_for(lock
, milliseconds(10));
1412 } while(!mQuit
.load(std::memory_order_relaxed
));
1414 /* Pass a null packet to finish the send buffers (the receive functions
1415 * will get AVERROR_EOF when emptied).
1417 if(mVideo
.mCodecCtx
)
1419 { std::lock_guard
<std::mutex
> lock(mVideo
.mQueueMtx
);
1420 avcodec_send_packet(mVideo
.mCodecCtx
.get(), nullptr);
1422 mVideo
.mQueueCond
.notify_one();
1424 if(mAudio
.mCodecCtx
)
1426 { std::lock_guard
<std::mutex
> lock(mAudio
.mQueueMtx
);
1427 avcodec_send_packet(mAudio
.mCodecCtx
.get(), nullptr);
1429 mAudio
.mQueueCond
.notify_one();
1431 video_queue
.clear();
1432 audio_queue
.clear();
1434 /* all done - wait for it */
1435 if(mVideoThread
.joinable())
1436 mVideoThread
.join();
1437 if(mAudioThread
.joinable())
1438 mAudioThread
.join();
1441 std::unique_lock
<std::mutex
> lock(mVideo
.mPictQMutex
);
1442 while(!mVideo
.mFinalUpdate
)
1443 mVideo
.mPictQCond
.wait(lock
);
1447 evt
.user
.type
= FF_MOVIE_DONE_EVENT
;
1448 SDL_PushEvent(&evt
);
1454 // Helper class+method to print the time with human-readable formatting.
1458 inline std::ostream
&operator<<(std::ostream
&os
, const PrettyTime
&rhs
)
1460 using hours
= std::chrono::hours
;
1461 using minutes
= std::chrono::minutes
;
1462 using std::chrono::duration_cast
;
1464 seconds t
= rhs
.mTime
;
1471 // Only handle up to hour formatting
1473 os
<< duration_cast
<hours
>(t
).count() << 'h' << std::setfill('0') << std::setw(2)
1474 << (duration_cast
<minutes
>(t
).count() % 60) << 'm';
1476 os
<< duration_cast
<minutes
>(t
).count() << 'm' << std::setfill('0');
1477 os
<< std::setw(2) << (duration_cast
<seconds
>(t
).count() % 60) << 's' << std::setw(0)
1478 << std::setfill(' ');
1485 int main(int argc
, char *argv
[])
1487 std::unique_ptr
<MovieState
> movState
;
1491 std::cerr
<< "Usage: "<<argv
[0]<<" [-device <device name>] [-direct] <files...>" <<std::endl
;
1494 /* Register all formats and codecs */
1496 /* Initialize networking protocols */
1497 avformat_network_init();
1499 if(SDL_Init(SDL_INIT_VIDEO
| SDL_INIT_TIMER
))
1501 std::cerr
<< "Could not initialize SDL - <<"<<SDL_GetError() <<std::endl
;
1505 /* Make a window to put our video */
1506 SDL_Window
*screen
= SDL_CreateWindow(AppName
.c_str(), 0, 0, 640, 480, SDL_WINDOW_RESIZABLE
);
1509 std::cerr
<< "SDL: could not set video mode - exiting" <<std::endl
;
1512 /* Make a renderer to handle the texture image surface and rendering. */
1513 Uint32 render_flags
= SDL_RENDERER_ACCELERATED
| SDL_RENDERER_PRESENTVSYNC
;
1514 SDL_Renderer
*renderer
= SDL_CreateRenderer(screen
, -1, render_flags
);
1517 SDL_RendererInfo rinf
{};
1520 /* Make sure the renderer supports IYUV textures. If not, fallback to a
1521 * software renderer. */
1522 if(SDL_GetRendererInfo(renderer
, &rinf
) == 0)
1524 for(Uint32 i
= 0;!ok
&& i
< rinf
.num_texture_formats
;i
++)
1525 ok
= (rinf
.texture_formats
[i
] == SDL_PIXELFORMAT_IYUV
);
1529 std::cerr
<< "IYUV pixelformat textures not supported on renderer "<<rinf
.name
<<std::endl
;
1530 SDL_DestroyRenderer(renderer
);
1536 render_flags
= SDL_RENDERER_SOFTWARE
| SDL_RENDERER_PRESENTVSYNC
;
1537 renderer
= SDL_CreateRenderer(screen
, -1, render_flags
);
1541 std::cerr
<< "SDL: could not create renderer - exiting" <<std::endl
;
1544 SDL_SetRenderDrawColor(renderer
, 0, 0, 0, 255);
1545 SDL_RenderFillRect(renderer
, nullptr);
1546 SDL_RenderPresent(renderer
);
1548 /* Open an audio device */
1550 ALCdevice
*device
= [argc
,argv
,&fileidx
]() -> ALCdevice
*
1552 ALCdevice
*dev
= NULL
;
1553 if(argc
> 3 && strcmp(argv
[1], "-device") == 0)
1556 dev
= alcOpenDevice(argv
[2]);
1558 std::cerr
<< "Failed to open \""<<argv
[2]<<"\" - trying default" <<std::endl
;
1560 return alcOpenDevice(nullptr);
1562 ALCcontext
*context
= alcCreateContext(device
, nullptr);
1563 if(!context
|| alcMakeContextCurrent(context
) == ALC_FALSE
)
1565 std::cerr
<< "Failed to set up audio device" <<std::endl
;
1567 alcDestroyContext(context
);
1571 const ALCchar
*name
= nullptr;
1572 if(alcIsExtensionPresent(device
, "ALC_ENUMERATE_ALL_EXT"))
1573 name
= alcGetString(device
, ALC_ALL_DEVICES_SPECIFIER
);
1574 if(!name
|| alcGetError(device
) != AL_NO_ERROR
)
1575 name
= alcGetString(device
, ALC_DEVICE_SPECIFIER
);
1576 std::cout
<< "Opened \""<<name
<<"\"" <<std::endl
;
1578 if(alcIsExtensionPresent(device
, "ALC_SOFT_device_clock"))
1580 std::cout
<< "Found ALC_SOFT_device_clock" <<std::endl
;
1581 alcGetInteger64vSOFT
= reinterpret_cast<LPALCGETINTEGER64VSOFT
>(
1582 alcGetProcAddress(device
, "alcGetInteger64vSOFT")
1586 if(alIsExtensionPresent("AL_SOFT_source_latency"))
1588 std::cout
<< "Found AL_SOFT_source_latency" <<std::endl
;
1589 alGetSourcei64vSOFT
= reinterpret_cast<LPALGETSOURCEI64VSOFT
>(
1590 alGetProcAddress("alGetSourcei64vSOFT")
1594 if(fileidx
< argc
&& strcmp(argv
[fileidx
], "-direct") == 0)
1597 if(!alIsExtensionPresent("AL_SOFT_direct_channels"))
1598 std::cerr
<< "AL_SOFT_direct_channels not supported for direct output" <<std::endl
;
1601 std::cout
<< "Found AL_SOFT_direct_channels" <<std::endl
;
1602 EnableDirectOut
= true;
1606 while(fileidx
< argc
&& !movState
)
1608 movState
= std::unique_ptr
<MovieState
>(new MovieState(argv
[fileidx
++]));
1609 if(!movState
->prepare()) movState
= nullptr;
1613 std::cerr
<< "Could not start a video" <<std::endl
;
1616 movState
->setTitle(screen
);
1618 /* Default to going to the next movie at the end of one. */
1619 enum class EomAction
{
1621 } eom_action
= EomAction::Next
;
1622 seconds
last_time(-1);
1626 int have_evt
= SDL_WaitEventTimeout(&event
, 10);
1628 auto cur_time
= std::chrono::duration_cast
<seconds
>(movState
->getMasterClock());
1629 if(cur_time
!= last_time
)
1631 auto end_time
= std::chrono::duration_cast
<seconds
>(movState
->getDuration());
1632 std::cout
<< "\r "<<PrettyTime
{cur_time
}<<" / "<<PrettyTime
{end_time
} <<std::flush
;
1633 last_time
= cur_time
;
1635 if(!have_evt
) continue;
1640 switch(event
.key
.keysym
.sym
)
1643 movState
->mQuit
= true;
1644 eom_action
= EomAction::Quit
;
1648 movState
->mQuit
= true;
1649 eom_action
= EomAction::Next
;
1657 case SDL_WINDOWEVENT
:
1658 switch(event
.window
.event
)
1660 case SDL_WINDOWEVENT_RESIZED
:
1661 SDL_SetRenderDrawColor(renderer
, 0, 0, 0, 255);
1662 SDL_RenderFillRect(renderer
, nullptr);
1671 movState
->mQuit
= true;
1672 eom_action
= EomAction::Quit
;
1675 case FF_UPDATE_EVENT
:
1676 reinterpret_cast<VideoState
*>(event
.user
.data1
)->updatePicture(
1681 case FF_REFRESH_EVENT
:
1682 reinterpret_cast<VideoState
*>(event
.user
.data1
)->refreshTimer(
1687 case FF_MOVIE_DONE_EVENT
:
1689 last_time
= seconds(-1);
1690 if(eom_action
!= EomAction::Quit
)
1693 while(fileidx
< argc
&& !movState
)
1695 movState
= std::unique_ptr
<MovieState
>(new MovieState(argv
[fileidx
++]));
1696 if(!movState
->prepare()) movState
= nullptr;
1700 movState
->setTitle(screen
);
1705 /* Nothing more to play. Shut everything down and quit. */
1708 alcMakeContextCurrent(nullptr);
1709 alcDestroyContext(context
);
1710 alcCloseDevice(device
);
1712 SDL_DestroyRenderer(renderer
);
1714 SDL_DestroyWindow(screen
);
1725 std::cerr
<< "SDL_WaitEvent error - "<<SDL_GetError() <<std::endl
;