AudioClipWorkflow.cpp 6.98 KB
Newer Older
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
1 2 3
/*****************************************************************************
 * AudioClipWorkflow.cpp : Clip workflow. Will extract a single frame from a VLCMedia
 *****************************************************************************
Ludovic Fauvet's avatar
Ludovic Fauvet committed
4
 * Copyright (C) 2008-2010 VideoLAN
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
 *
 * Authors: Hugo Beauzee-Luyssen <hugo@vlmc.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#include <QtDebug>

#include "AudioClipWorkflow.h"
26
#include "VLCMedia.h"
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
27

28 29
AudioClipWorkflow::AudioClipWorkflow( ClipHelper *ch ) :
        ClipWorkflow( ch )
30 31 32 33 34 35 36 37 38 39 40
{
    m_ptsOffset = 0;
}

AudioClipWorkflow::~AudioClipWorkflow()
{
    releasePrealocated();
}

void
AudioClipWorkflow::preallocate()
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
41
{
42
    for ( quint32 i = 0; i < AudioClipWorkflow::nbBuffers; ++i )
43
    {
44
        AudioSample *as = new AudioSample;
45 46 47
        as->buff = NULL;
        m_availableBuffers.push_back( as );
    }
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
48 49
}

50 51
void
AudioClipWorkflow::releasePrealocated()
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
52
{
53
    while ( m_availableBuffers.isEmpty() == false )
54 55 56 57 58
    {
        AudioSample *as = m_availableBuffers.takeFirst();
        delete as->buff;
        delete as;
    }
59
    while ( m_computedBuffers.isEmpty() == false )
60 61 62 63 64
    {
        AudioSample *as = m_computedBuffers.takeFirst();
        delete as->buff;
        delete as;
    }
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
65 66
}

Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
67 68
void*
AudioClipWorkflow::getLockCallback() const
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
69
{
70
    return reinterpret_cast<void*>( &AudioClipWorkflow::lock );
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
71 72
}

Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
73 74
void*
AudioClipWorkflow::getUnlockCallback() const
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
75
{
76
    return reinterpret_cast<void*>( &AudioClipWorkflow::unlock );
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
77 78
}

Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
79 80
void*
AudioClipWorkflow::getOutput( ClipWorkflow::GetMode mode )
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
81 82
{
    QMutexLocker    lock( m_renderLock );
83

84
    if ( getNbComputedBuffers() == 0 )
85
        return NULL;
86
    if ( shouldRender() == false )
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
87
        return NULL;
88 89
    if ( mode == ClipWorkflow::Get )
        qCritical() << "A sound buffer should never be asked with 'Get' mode";
90
    ::StackedBuffer<AudioSample*> *buff = new StackedBuffer(
91
            m_computedBuffers.dequeue(), this, true );
92 93 94 95 96 97 98 99 100 101
    if ( m_previousPts == -1 )
    {
        buff->get()->ptsDiff = 0;
        m_previousPts = buff->get()->pts;
    }
    else
    {
        buff->get()->ptsDiff = buff->get()->pts - m_previousPts;
        m_previousPts = buff->get()->pts;
    }
102
    postGetOutput();
103
    return buff;
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
104 105
}

106 107
void
AudioClipWorkflow::initVlcOutput()
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
108
{
109
    preallocate();
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
110
    m_vlcMedia->addOption( ":no-sout-video" );
111
    m_vlcMedia->addOption( ":no-video" );
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
112 113 114 115
    m_vlcMedia->addOption( ":sout=#transcode{}:smem" );
    m_vlcMedia->setAudioDataCtx( this );
    m_vlcMedia->setAudioLockCallback( reinterpret_cast<void*>( getLockCallback() ) );
    m_vlcMedia->setAudioUnlockCallback( reinterpret_cast<void*>( getUnlockCallback() ) );
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
116
    m_vlcMedia->addOption( ":sout-transcode-acodec=f32l" );
117 118
    m_vlcMedia->addOption( ":sout-transcode-samplerate=48000" );
    m_vlcMedia->addOption( ":sout-transcode-channels=2" );
119
    m_vlcMedia->addOption( ":no-sout-transcode-hurry-up" );
120 121 122 123
    if ( m_fullSpeedRender == false )
        m_vlcMedia->addOption( ":sout-smem-time-sync" );
    else
        m_vlcMedia->addOption( ":no-sout-smem-time-sync" );
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
124 125
}

126 127
AudioClipWorkflow::AudioSample*
AudioClipWorkflow::createBuffer( size_t size )
128
{
129
    AudioSample *as = new AudioSample;
130 131 132 133 134
    as->buff = new uchar[size];
    as->size = size;
    return as;
}

135 136
void
AudioClipWorkflow::lock( AudioClipWorkflow *cw, quint8 **pcm_buffer , quint32 size )
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
137
{
138 139
    cw->m_renderLock->lock();

140
    AudioSample     *as = NULL;
141 142 143
    if ( cw->m_availableBuffers.isEmpty() == true )
        as = cw->createBuffer( size );
    else
144
    {
145
        as = cw->m_availableBuffers.dequeue();
146 147 148 149 150 151 152
        if ( as->buff == NULL )
        {
            as->buff = new uchar[size];
            as->size = size;
        }
    }
    cw->m_computedBuffers.enqueue( as );
153
    *pcm_buffer = as->buff;
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
154 155
}

156 157 158 159 160
void
AudioClipWorkflow::unlock( AudioClipWorkflow *cw, quint8 *pcm_buffer,
                                      quint32 channels, quint32 rate,
                                      quint32 nb_samples, quint32 bits_per_sample,
                                      quint32 size, qint64 pts )
Hugo Beauzee-Luyssen's avatar
Hugo Beauzee-Luyssen committed
161 162 163 164 165
{
    Q_UNUSED( pcm_buffer );
    Q_UNUSED( rate );
    Q_UNUSED( bits_per_sample );
    Q_UNUSED( size );
166

167
    pts -= cw->m_ptsOffset;
168
    AudioSample* as = cw->m_computedBuffers.last();
169
    if ( as->buff != NULL )
170
    {
171 172
        as->nbSample = nb_samples;
        as->nbChannels = channels;
173 174 175 176 177 178 179 180 181 182 183 184 185 186
        as->ptsDiff = 0;
        as->pts = pts;
        if ( cw->m_pauseDuration != -1 )
        {
            cw->m_ptsOffset += cw->m_pauseDuration;
            cw->m_pauseDuration = -1;
        }
        if ( cw->m_currentPts > pts )
        {
            cw->m_computedBuffers.removeLast();
            cw->insertPastBlock( as );
        }
        else
            cw->m_currentPts = pts;
187
    }
188
    cw->commonUnlock();
189
    cw->m_renderLock->unlock();
190 191
}

192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210
void
AudioClipWorkflow::insertPastBlock( AudioSample *as )
{
    QQueue<AudioSample*>::iterator    it = m_computedBuffers.begin();
    QQueue<AudioSample*>::iterator    end = m_computedBuffers.end();

    while ( it != end )
    {
        if ( (*it)->pts > as->pts )
        {
            m_computedBuffers.insert( it, as );
            return ;
        }
        ++it;
    }
    //Fail safe: reinsert the block at the end.
    m_computedBuffers.push_back( as );
}

211 212
quint32
AudioClipWorkflow::getNbComputedBuffers() const
213 214 215
{
    return m_computedBuffers.count();
}
216

217 218
quint32
AudioClipWorkflow::getMaxComputedBuffers() const
219 220 221
{
    return AudioClipWorkflow::nbBuffers;
}
222

223 224
void
AudioClipWorkflow::releaseBuffer( AudioSample *sample )
225
{
226
    QMutexLocker    lock( m_renderLock );
227 228
    m_availableBuffers.enqueue( sample );
}
229

230 231
void
AudioClipWorkflow::flushComputedBuffers()
232
{
233
    QMutexLocker        lock( m_renderLock );
234 235 236 237 238 239

    while ( m_computedBuffers.isEmpty() == false )
    {
        m_availableBuffers.enqueue( m_computedBuffers.dequeue() );
    }
}
240 241

AudioClipWorkflow::StackedBuffer::StackedBuffer( AudioClipWorkflow::AudioSample *as,
242 243
                                                AudioClipWorkflow *poolHandler,
                                                bool mustBeReleased) :
244 245 246 247 248
    ::StackedBuffer<AudioClipWorkflow::AudioSample*>( as, mustBeReleased ),
    m_poolHandler( poolHandler )
{
}

249 250
void
AudioClipWorkflow::StackedBuffer::release()
251
{
252
    if ( m_mustRelease == true && m_poolHandler.isNull() == false )
253 254 255
        m_poolHandler->releaseBuffer( m_buff );
    delete this;
}