Exemplo n.º 1
0
void UseSeg (const SegDef* D)
/* Use the segment with the given name */
{
    Segment* Seg = SegmentList;
    while (Seg) {
       	if (strcmp (Seg->Def->Name, D->Name) == 0) {
     	    /* We found this segment. Check if the type is identical */
	    if (D->AddrSize != ADDR_SIZE_DEFAULT &&
                Seg->Def->AddrSize != D->AddrSize) {
		Error ("Segment attribute mismatch");
		/* Use the new attribute to avoid errors */
	        Seg->Def->AddrSize = D->AddrSize;
       	    }
       	    ActiveSeg = Seg;
     	    return;
     	}
     	/* Check next segment */
     	Seg = Seg->List;
    }

    /* Segment is not in list, create a new one */
    if (D->AddrSize == ADDR_SIZE_DEFAULT) {
        Seg = NewSegment (D->Name, ADDR_SIZE_ABS);
    } else {
        Seg = NewSegment (D->Name, D->AddrSize);
    }
    ActiveSeg = Seg;
}
Exemplo n.º 2
0
void UseSeg (const SegDef* D)
/* Use the segment with the given name */
{
    unsigned I;
    for (I = 0; I < CollCount (&SegmentList); ++I) {
        Segment* Seg = CollAtUnchecked (&SegmentList, I);
       	if (strcmp (Seg->Def->Name, D->Name) == 0) {
     	    /* We found this segment. Check if the type is identical */
	    if (D->AddrSize != ADDR_SIZE_DEFAULT &&
                Seg->Def->AddrSize != D->AddrSize) {
	 	Error ("Segment attribute mismatch");
	 	/* Use the new attribute to avoid errors */
	        Seg->Def->AddrSize = D->AddrSize;
       	    }
       	    ActiveSeg = Seg;
     	    return;
     	}
    }

    /* Segment is not in list, create a new one */
    if (D->AddrSize == ADDR_SIZE_DEFAULT) {
        ActiveSeg = NewSegment (D->Name, ADDR_SIZE_ABS);
    } else {
        ActiveSeg = NewSegment (D->Name, D->AddrSize);
    }
}
Exemplo n.º 3
0
static already_AddRefed<SharedMemory>
ReadSegment(const IPC::Message& aDescriptor, Shmem::id_t* aId, size_t* aNBytes, size_t aExtraSize)
{
  if (SHMEM_CREATED_MESSAGE_TYPE != aDescriptor.type()) {
    NS_ERROR("expected 'shmem created' message");
    return nullptr;
  }
  SharedMemory::SharedMemoryType type;
  PickleIterator iter(aDescriptor);
  if (!ShmemCreated::ReadInfo(&aDescriptor, &iter, aId, aNBytes, &type)) {
    return nullptr;
  }
  RefPtr<SharedMemory> segment = NewSegment(type);
  if (!segment) {
    return nullptr;
  }
  if (!segment->ReadHandle(&aDescriptor, &iter)) {
    NS_ERROR("trying to open invalid handle");
    return nullptr;
  }
  aDescriptor.EndRead(iter);
  size_t size = SharedMemory::PageAlignedSize(*aNBytes + aExtraSize);
  if (!segment->Map(size)) {
    return nullptr;
  }
  // close the handle to the segment after it is mapped
  segment->CloseHandle();
  return segment.forget();
}
void CDXVADecoderMpeg2::Init()
{
	TRACE(_T("CDXVADecoderMpeg2::Init()\n"));

	memset (&m_PictureParams,	0, sizeof(m_PictureParams));
	memset (&m_SliceInfo,		0, sizeof(m_SliceInfo));
	memset (&m_QMatrixData,		0, sizeof(m_QMatrixData));

	m_PictureParams.bMacroblockWidthMinus1			= 15;	// This is equal to "15" for MPEG-1, MPEG-2, H.263, and MPEG-4
	m_PictureParams.bMacroblockHeightMinus1			= 15;	// This is equal to "15" for MPEG-1, MPEG-2, H.261, H.263, and MPEG-4
	m_PictureParams.bBlockWidthMinus1				= 7;	// This is equal to "7" for MPEG-1, MPEG-2, H.261, H.263, and MPEG-4
	m_PictureParams.bBlockHeightMinus1				= 7;	// This is equal to "7" for MPEG-1, MPEG-2, H.261, H.263, and MPEG-4
	m_PictureParams.bBPPminus1						= 7;	// It is equal to "7" for MPEG-1, MPEG-2, H.261, and H.263

	m_PictureParams.bChromaFormat					= 0x01;	// For MPEG-1, MPEG-2 "Main Profile," H.261 and H.263 bitstreams, this value shall always be set to "01", indicating "4:2:0" format


	m_nMaxWaiting			= 5;
	m_wRefPictureIndex[0]	= NO_REF_FRAME;
	m_wRefPictureIndex[1]	= NO_REF_FRAME;
	m_nSliceCount			= 0;

	switch (GetMode()) {
		case MPEG2_VLD :
			AllocExecuteParams (4);
			break;
		default :
			ASSERT(FALSE);
	}

	m_pMPEG2Buffer			= NULL;
	m_nMPEG2BufferSize		= 0;

	NewSegment();
}
Exemplo n.º 5
0
Arquivo: segments.c Projeto: cc65/cc65
Segment* GetSegment (unsigned Name, unsigned char AddrSize, const char* ObjName)
/* Search for a segment and return an existing one. If the segment does not
** exist, create a new one and return that. ObjName is only used for the error
** message and may be NULL if the segment is linker generated.
*/
{
    /* Try to locate the segment in the table */
    Segment* S = SegFind (Name);

    /* If we don't have that segment already, allocate it using the type of
    ** the first section.
    */
    if (S == 0) {
        /* Create a new segment */
        S = NewSegment (Name, AddrSize);
    } else {
        /* Check if the existing segment has the requested address size */
        if (S->AddrSize != AddrSize) {
            /* Allow an empty object name */
            if (ObjName == 0) {
                ObjName = "[linker generated]";
            }
            Error ("Module '%s': Type mismatch for segment '%s'", ObjName,
                   GetString (Name));
        }
    }

    /* Return the segment */
    return S;
}
Exemplo n.º 6
0
//this is where the list of segments is created
//returns t which is an object whose head points to the first segment of the track
track *NewTrack(int maxx, int maxy){
	int i, random;
	
	track *t = (track *) malloc(sizeof(track));
	t->maxx = maxx;
	t->maxy = maxy;
	t->tail = NewSegment(10, t, maxx, maxy);
	drawSegment(t->tail);
	for(i = 0; i < maxy-2; i++){
		t->head = NewSegment(10, t, maxx, maxy);
		//drawSegment(t->head);
	}
	drawSegment(t->head);

	refresh();
	return t;
}
Exemplo n.º 7
0
static void registerSegment( orl_sec_handle o_shnd )
//**************************************************
{
    orl_sec_flags               sec_flags;
    orl_sec_handle              reloc_section;
    orl_sec_alignment           alignment;
    char *                      content;
    int                         ctr;
    segment                     *seg;

    seg = NewSegment();
    seg->name = ORLSecGetName( o_shnd );
    seg->size = ORLSecGetSize( o_shnd );
    seg->start = 0;
    seg->use_32 = 1;            // only 32-bit object files use ORL
    seg->attr = ( 2 << 2 );     // (?) combine public
    alignment = ORLSecGetAlignment( o_shnd );
    // FIXME: Need better alignment translation.
    switch( alignment ) {
    case 0:
        seg->attr |= ( 1 << 5 ); break;
    case 1:
        seg->attr |= ( 2 << 5 ); break;
    case 3:
    case 4:
        seg->attr |= ( 3 << 5 ); break;
    case 8:
        seg->attr |= ( 4 << 5 ); break;
    case 2:
        seg->attr |= ( 5 << 5 ); break;
    case 12:
        seg->attr |= ( 6 << 5 ); break;
    default:
        // fprintf( stderr, "NOTE! 'Strange' alignment (%d) found. Using byte alignment.\n", alignment );
        seg->attr |= ( 1 << 5 ); break;
    }
    sec_flags = ORLSecGetFlags( o_shnd );
    if( !( sec_flags & ORL_SEC_FLAG_EXEC ) ) {
        seg->data_seg = true;
    }
    if( seg->size > 0 && ORLSecGetContents( o_shnd, &content ) == ORL_OKAY ) {
        Segment = seg;
        // Putting contents into segment struct.
        for( ctr = 0; ctr < seg->size; ctr++ ) {
            PutSegByte( ctr, content[ctr] );
        }
    }
    if( !HashTableInsert( SectionToSegmentTable, (hash_value)o_shnd, (hash_data)seg ) ) {
        SysError( ERR_OUT_OF_MEM, false );
    }
    reloc_section = ORLSecGetRelocTable( o_shnd );
    if( reloc_section ) {
        if( !addRelocSection( reloc_section ) ) {
            SysError( ERR_OUT_OF_MEM, false );
        }
    }
}
Exemplo n.º 8
0
void Synchronizer::NewSegment() {

	if(m_output_format->m_audio_enabled) {
		AudioLock audiolock(&m_audio_data);
		InitAudioSegment(audiolock.get());
	}

	SharedLock lock(&m_shared_data);
	NewSegment(lock.get());

}
Exemplo n.º 9
0
void Synchronizer::NewSegment() {

	{
		AudioLock audiolock(&m_audio_data);
		InitAudioSegment(audiolock.get());
	}

	SharedLock lock(&m_shared_data);
	NewSegment(lock.get());

}
Exemplo n.º 10
0
void Synchronizer::ReadAudioHole() {
	Q_ASSERT(m_audio_encoder != NULL);
	SharedLock lock(&m_shared_data);

	// if the audio has not been started, ignore it
	if(!lock->m_segment_audio_started)
		return;

	Logger::LogWarning("[Synchronizer::ReadAudioSamples] Warning: Received hole in audio stream, starting new segment to keep the audio in sync with the video (some video and/or audio may be lost).");
	NewSegment(lock.get());

}
Exemplo n.º 11
0
static already_AddRefed<SharedMemory>
CreateSegment(SharedMemory::SharedMemoryType aType, size_t aNBytes, size_t aExtraSize)
{
  RefPtr<SharedMemory> segment = NewSegment(aType);
  if (!segment) {
    return nullptr;
  }
  size_t size = SharedMemory::PageAlignedSize(aNBytes + aExtraSize);
  if (!segment->Create(size) || !segment->Map(size)) {
    return nullptr;
  }
  return segment.forget();
}
Exemplo n.º 12
0
//----------------------------------------------------------------------------
//! @brief	  	フィルタをポーズする
//! @return		エラーコード
//----------------------------------------------------------------------------
STDMETHODIMP CDemuxSource::Pause()
{
	{
		CAutoLock lock(&m_crtFilterLock);
		if( m_State == State_Stopped )
		{
			HRESULT	hr = Reader()->OnStart();
			if( FAILED(hr) )
				return hr;
			NewSegment();
		}
	}
	return CSource::Pause();
}
Exemplo n.º 13
0
//--------------------------------------------------------------------------------------------------
static dstr_Ref_t NewOrFirstSegmentRef
(
    dstr_Ref_t headRef  ///< [IN] The head of the string.
)
//--------------------------------------------------------------------------------------------------
{
    dstr_Ref_t segmentRef = FirstSegmentRef(headRef);

    if (segmentRef != NULL)
    {
        return segmentRef;
    }

    segmentRef = NewSegment();
    le_sls_Stack(&headRef->head.list, &segmentRef->body.link);

    return segmentRef;
}
Exemplo n.º 14
0
//--------------------------------------------------------------------------------------------------
static dstr_Ref_t NewOrNextSegmentRef
(
    dstr_Ref_t headRef,    ///< [IN] The head of the string.
    dstr_Ref_t currentPtr  ///< [IN] The current sub-section of the string.
)
//--------------------------------------------------------------------------------------------------
{
    dstr_Ref_t segmentRef = NextSegmentRef(headRef, currentPtr);

    if (segmentRef != NULL)
    {
        return segmentRef;
    }

    segmentRef = NewSegment();
    le_sls_AddAfter(&headRef->head.list, &currentPtr->body.link, &segmentRef->body.link);

    return segmentRef;
}
Exemplo n.º 15
0
HRESULT CBufferFilterOutputPin::DeliverNewSegment(REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
{
	CallQueue(NewSegment(tStart, tStop, dRate));
}
Exemplo n.º 16
0
void Synchronizer::ReadAudioSamples(unsigned int sample_rate, unsigned int channels, unsigned int sample_count, const uint8_t* data, AVSampleFormat format, int64_t timestamp) {
	Q_ASSERT(m_audio_encoder != NULL);
	SharedLock lock(&m_shared_data);

	if(lock->m_sync_diagram != NULL) {
		lock->m_sync_diagram->AddBlock(1, (double) timestamp * 1.0e-6, (double) timestamp * 1.0e-6 + (double) sample_count / (double) m_audio_sample_rate, QColor(0, 255, 0));
	}

	if(sample_count == 0)
		return;

	// check the timestamp
	if(lock->m_segment_audio_started && timestamp < lock->m_segment_audio_last_timestamp) {
		if(timestamp < lock->m_segment_audio_last_timestamp - 10000)
			Logger::LogWarning("[Synchronizer::ReadAudioSamples] Warning: Received audio samples with non-monotonic timestamp.");
		timestamp = lock->m_segment_audio_last_timestamp;
	}

	Q_ASSERT(sample_rate == m_audio_sample_rate); // resampling isn't supported
	Q_ASSERT(channels == m_audio_channels); // remixing isn't supported
	Q_ASSERT(format == AV_SAMPLE_FMT_S16); // only S16 is currently supported

	// avoid memory problems by limiting the audio buffer size
	if(lock->m_audio_buffer.GetSize() / m_audio_sample_size >= MAX_AUDIO_SAMPLES_BUFFERED) {
		if(lock->m_segment_video_started) {
			Logger::LogWarning("[Synchronizer::ReadAudioSamples] Warning: Audio buffer overflow, starting new segment to keep the audio in sync with the video "
							   "(some video and/or audio may be lost). The video input seems to be too slow.");
			NewSegment(lock.get());
		} else {
			// If the video hasn't started yet, it makes more sense to drop the oldest samples.
			// Shifting the start time like this isn't completely accurate, but this shouldn't happen often anyway.
			// The number of samples dropped is calculated so that the buffer will be 90% full after this.
			size_t n = lock->m_audio_buffer.GetSize() / m_audio_sample_size - (MAX_AUDIO_SAMPLES_BUFFERED - MAX_AUDIO_SAMPLES_BUFFERED / 10);
			lock->m_audio_buffer.Drop(n * m_audio_sample_size);
			lock->m_segment_audio_start_time += (int64_t) round((double) n / (double) m_audio_sample_rate * 1.0e6);
		}
	}

	// do speed correction (i.e. do the calculations so the video can synchronize to it)
	// The point of speed correction is to keep video and audio in sync even when the clocks are not running at exactly the same speed.
	// This can happen because the sample rate of the sound card is not always 100% accurate. Even a 0.1% error will result in audio that is
	// seconds too early or too late at the end of a one hour video. This problem doesn't occur on all computers though (I'm not sure why).
	// Another cause of desynchronization is problems/glitches with PulseAudio (e.g. jumps in time when switching between sources).
	if(lock->m_segment_audio_started) {
		double sample_length = (double) (lock->m_segment_audio_samples_read + lock->m_audio_buffer.GetSize() / m_audio_sample_size) / (double) m_audio_sample_rate;
		double time_length = (double) (timestamp - lock->m_segment_audio_start_time) * 1.0e-6;
		double current_error = (sample_length - time_length) - lock->m_av_desync;
		if(fabs(current_error) > DESYNC_ERROR_THRESHOLD) {
			Logger::LogWarning("[Synchronizer::ReadAudioSamples] Warning: Desynchronization is too high, starting new segment to keep the audio "
							   "in sync with the video (some video and/or audio may be lost).");
			NewSegment(lock.get());
		} else {
			double dt = std::min((double) (timestamp - lock->m_segment_audio_last_timestamp) * 1.0e-6, 0.5);
			lock->m_av_desync_i = clamp(lock->m_av_desync_i + DESYNC_CORRECTION_I * current_error * dt, -1.0, 1.0);
			lock->m_av_desync += (DESYNC_CORRECTION_P * current_error + lock->m_av_desync_i) * dt;
			if(lock->m_av_desync_i < -0.05 && lock->m_warn_desync) {
				lock->m_warn_desync = false;
				Logger::LogWarning("[Synchronizer::ReadAudioSamples] Warning: Audio input is more than 5% too slow!");
			}
			if(lock->m_av_desync_i > 0.05 && lock->m_warn_desync) {
				lock->m_warn_desync = false;
				Logger::LogWarning("[Synchronizer::ReadAudioSamples] Warning: Audio input is more than 5% too fast!");
			}
		}
	}

	// start audio
	if(!lock->m_segment_audio_started) {
		lock->m_segment_audio_started = true;
		lock->m_segment_audio_start_time = timestamp;
		lock->m_segment_audio_stop_time = timestamp;
	}

	// store the samples
	lock->m_segment_audio_last_timestamp = timestamp;
	lock->m_audio_buffer.Write((const char*) data, sample_count * m_audio_sample_size);

	// increase segment stop time
	double sample_length = (double) (lock->m_segment_audio_samples_read + lock->m_audio_buffer.GetSize() / m_audio_sample_size) / (double) m_audio_sample_rate;
	lock->m_segment_audio_stop_time = lock->m_segment_audio_start_time + (int64_t) round(sample_length * 1.0e6);

	//Logger::LogInfo("[Synchronizer::ReadAudioSamples] Added audio samples at " + QString::number(timestamp) + ".");

}
Exemplo n.º 17
0
void Synchronizer::NewSegment() {
	SharedLock lock(&m_shared_data);
	NewSegment(lock.get());
}
Exemplo n.º 18
0
void Synchronizer::ReadAudioSamples(unsigned int channels, unsigned int sample_rate, AVSampleFormat format, unsigned int sample_count, const uint8_t* data, int64_t timestamp) {
	assert(m_output_format->m_audio_enabled);

	// sanity check
	if(sample_count == 0)
		return;

	// add new block to sync diagram
	if(m_sync_diagram != NULL)
		m_sync_diagram->AddBlock(1, (double) timestamp * 1.0e-6, (double) timestamp * 1.0e-6 + (double) sample_count / (double) sample_rate, QColor(0, 255, 0));

	AudioLock audiolock(&m_audio_data);

	// check the timestamp
	if(timestamp < audiolock->m_last_timestamp) {
		if(timestamp < audiolock->m_last_timestamp - 10000)
			Logger::LogWarning("[Synchronizer::ReadAudioSamples] " + Logger::tr("Warning: Received audio samples with non-monotonic timestamp."));
		timestamp = audiolock->m_last_timestamp;
	}

	// update the timestamps
	int64_t previous_timestamp;
	if(audiolock->m_first_timestamp == (int64_t) AV_NOPTS_VALUE) {
		audiolock->m_filtered_timestamp = timestamp;
		audiolock->m_first_timestamp = timestamp;
		previous_timestamp = timestamp;
	} else {
		previous_timestamp = audiolock->m_last_timestamp;
	}
	audiolock->m_last_timestamp = timestamp;

	// filter the timestamp
	int64_t timestamp_delta = (int64_t) sample_count * (int64_t) 1000000 / (int64_t) sample_rate;
	audiolock->m_filtered_timestamp += (timestamp - audiolock->m_filtered_timestamp) / AUDIO_TIMESTAMP_FILTER;

	// calculate drift
	double current_drift = GetAudioDrift(audiolock.get());

	// if there are too many audio samples, drop some of them (unlikely unless you use PulseAudio)
	if(current_drift > DRIFT_ERROR_THRESHOLD && !audiolock->m_drop_samples) {
		audiolock->m_drop_samples = true;
		Logger::LogWarning("[Synchronizer::ReadAudioSamples] " + Logger::tr("Warning: Too many audio samples, dropping samples to keep the audio in sync with the video."));
	}

	// if there are not enough audio samples, insert zeros
	if(current_drift < -DRIFT_ERROR_THRESHOLD && !audiolock->m_insert_samples) {
		audiolock->m_insert_samples = true;
		Logger::LogWarning("[Synchronizer::ReadAudioSamples] " + Logger::tr("Warning: Not enough audio samples, inserting silence to keep the audio in sync with the video."));
	}

	// reset filter and recalculate drift if necessary
	if(audiolock->m_drop_samples || audiolock->m_insert_samples) {
		audiolock->m_filtered_timestamp = timestamp;
		current_drift = GetAudioDrift(audiolock.get());
	}

	// drop samples
	if(audiolock->m_drop_samples) {
		audiolock->m_drop_samples = false;

		// drop samples
		int n = (int) round(current_drift * (double) sample_rate);
		if(n > 0) {
			if(n >= (int) sample_count) {
				audiolock->m_drop_samples = true;
				return; // drop all samples
			}
			if(format == AV_SAMPLE_FMT_FLT) {
				data += n * channels * sizeof(float);
			} else if(format == AV_SAMPLE_FMT_S16) {
				data += n * channels * sizeof(int16_t);
			} else {
				assert(false);
			}
			sample_count -= n;
		}

	}

	// insert zeros
	unsigned int sample_count_out = 0;
	if(audiolock->m_insert_samples) {
		audiolock->m_insert_samples = false;

		// how many samples should be inserted?
		int n = (int) round(-current_drift * (double) sample_rate);
		if(n > 0) {

			// insert zeros
			audiolock->m_temp_input_buffer.Alloc(n * m_output_format->m_audio_channels);
			std::fill_n(audiolock->m_temp_input_buffer.GetData(), n * m_output_format->m_audio_channels, 0.0f);
			sample_count_out = audiolock->m_fast_resampler->Resample((double) sample_rate / (double) m_output_format->m_audio_sample_rate, 1.0,
																	 audiolock->m_temp_input_buffer.GetData(), n, &audiolock->m_temp_output_buffer, sample_count_out);

			// recalculate drift
			current_drift = GetAudioDrift(audiolock.get(), sample_count_out);

		}

	}

	// increase filtered timestamp
	audiolock->m_filtered_timestamp += timestamp_delta;

	// do drift correction
	// The point of drift correction is to keep video and audio in sync even when the clocks are not running at exactly the same speed.
	// This can happen because the sample rate of the sound card is not always 100% accurate. Even a 0.1% error will result in audio that is
	// seconds too early or too late at the end of a one hour video. This problem doesn't occur on all computers though (I'm not sure why).
	// Another cause of desynchronization is problems/glitches with PulseAudio (e.g. jumps in time when switching between sources).
	double drift_correction_dt = fmin((double) (timestamp - previous_timestamp) * 1.0e-6, DRIFT_MAX_BLOCK);
	audiolock->m_average_drift = clamp(audiolock->m_average_drift + DRIFT_CORRECTION_I * current_drift * drift_correction_dt, -0.5, 0.5);
	if(audiolock->m_average_drift < -0.02 && audiolock->m_warn_desync) {
		audiolock->m_warn_desync = false;
		Logger::LogWarning("[Synchronizer::ReadAudioSamples] " + Logger::tr("Warning: Audio input is more than 2% too slow!"));
	}
	if(audiolock->m_average_drift > 0.02 && audiolock->m_warn_desync) {
		audiolock->m_warn_desync = false;
		Logger::LogWarning("[Synchronizer::ReadAudioSamples] " + Logger::tr("Warning: Audio input is more than 2% too fast!"));
	}
	double length = (double) sample_count / (double) sample_rate;
	double drift_correction = clamp(DRIFT_CORRECTION_P * current_drift + audiolock->m_average_drift, -0.5, 0.5) * fmin(1.0, DRIFT_MAX_BLOCK / length);

	//qDebug() << "current_drift" << current_drift << "average_drift" << audiolock->m_average_drift << "drift_correction" << drift_correction;

	// convert the samples
	const float *data_float = NULL; // to keep GCC happy
	if(format == AV_SAMPLE_FMT_FLT) {
		if(channels == m_output_format->m_audio_channels) {
			data_float = (const float*) data;
		} else {
			audiolock->m_temp_input_buffer.Alloc(sample_count * m_output_format->m_audio_channels);
			data_float = audiolock->m_temp_input_buffer.GetData();
			SampleChannelRemap(sample_count, (const float*) data, channels, audiolock->m_temp_input_buffer.GetData(), m_output_format->m_audio_channels);
		}
	} else if(format == AV_SAMPLE_FMT_S16) {
		audiolock->m_temp_input_buffer.Alloc(sample_count * m_output_format->m_audio_channels);
		data_float = audiolock->m_temp_input_buffer.GetData();
		SampleChannelRemap(sample_count, (const int16_t*) data, channels, audiolock->m_temp_input_buffer.GetData(), m_output_format->m_audio_channels);
	} else {
		assert(false);
	}

	// resample
	sample_count_out = audiolock->m_fast_resampler->Resample((double) sample_rate / (double) m_output_format->m_audio_sample_rate, 1.0 / (1.0 - drift_correction),
															 data_float, sample_count, &audiolock->m_temp_output_buffer, sample_count_out);
	audiolock->m_samples_written += sample_count_out;

	SharedLock lock(&m_shared_data);

	// avoid memory problems by limiting the audio buffer size
	if(lock->m_audio_buffer.GetSize() / m_output_format->m_audio_channels >= MAX_AUDIO_SAMPLES_BUFFERED) {
		if(lock->m_segment_video_started) {
			Logger::LogWarning("[Synchronizer::ReadAudioSamples] " + Logger::tr("Warning: Audio buffer overflow, starting new segment to keep the audio in sync with the video "
																				"(some video and/or audio may be lost). The video input seems to be too slow."));
			NewSegment(lock.get());
		} else {
			// If the video hasn't started yet, it makes more sense to drop the oldest samples.
			// Shifting the start time like this isn't completely accurate, but this shouldn't happen often anyway.
			// The number of samples dropped is calculated so that the buffer will be 90% full after this.
			size_t n = lock->m_audio_buffer.GetSize() / m_output_format->m_audio_channels - MAX_AUDIO_SAMPLES_BUFFERED * 9 / 10;
			lock->m_audio_buffer.Pop(n * m_output_format->m_audio_channels);
			lock->m_segment_audio_start_time += (int64_t) round((double) n / (double) m_output_format->m_audio_sample_rate * 1.0e6);
		}
	}

	// start audio
	if(!lock->m_segment_audio_started) {
		lock->m_segment_audio_started = true;
		lock->m_segment_audio_start_time = timestamp;
		lock->m_segment_audio_stop_time = timestamp;
	}

	// store the samples
	lock->m_audio_buffer.Push(audiolock->m_temp_output_buffer.GetData(), sample_count_out * m_output_format->m_audio_channels);

	// increase segment stop time
	double new_sample_length = (double) (lock->m_segment_audio_samples_read + lock->m_audio_buffer.GetSize() / m_output_format->m_audio_channels) / (double) m_output_format->m_audio_sample_rate;
	lock->m_segment_audio_stop_time = lock->m_segment_audio_start_time + (int64_t) round(new_sample_length * 1.0e6);

}
Exemplo n.º 19
0
CDXVADecoderMpeg2::~CDXVADecoderMpeg2(void)
{
	TRACE(_T("CDXVADecoderMpeg2::Destroy()\n"));
	NewSegment();
}