video-pc/AvPlayer2/start_play_thread.cpp

// ***********************************************************/
// start_play_thread.cpp
//
//      Copy Right @ Steven Huang. All rights reserved.
//
// start play thread. Do the audio device initialization work
// which is time-consuming to avoid GUI freezing.
// ***********************************************************/

#include "start_play_thread.h"
#include "playercontroller.h"

StartPlayThread::StartPlayThread(QObject* parent)
    : QThread(parent)
{}

StartPlayThread::~StartPlayThread() {}

void StartPlayThread::run()
{
    PlayerController* pParent = (PlayerController*) parent();
    assert(pParent);
    bool ret = false;

#if !NDEBUG
    QElapsedTimer timer;
    timer.start();
#endif

    float vol = 1.0;
    //pParent->volume_settings(false);
    AVSampleFormat sample_fmt = AV_SAMPLE_FMT_S16; // play out format

    VideoStateData* pVideoStateData = pParent->videoStateData();
    if (pVideoStateData) {
        AVCodecContext* pAudio = pVideoStateData->get_contex(AVMEDIA_TYPE_AUDIO);
        VideoState* pState = pVideoStateData->get_state();
        if (pAudio) {
            AudioPlayThread* pThread = pParent->audioPlayThread();
            if (pThread) {
                ret = pThread->init_device(pAudio->sample_rate,
                                           pAudio->ch_layout.nb_channels,
                                           sample_fmt,
                                           vol); // pAudio->sample_fmt
                if (!ret) {
                    qWarning("audio play init_device failed.");
                }

                if (ret) {
                    ret = pThread->init_resample_param(pAudio, sample_fmt, pState);
                    if (!ret) {
                        qWarning("audio play init resample param failed.");
                    }
                }
            }
        }
    }

    emit audio_device_init(ret);
#if !NDEBUG
    qDebug("Start play operation took %d milliseconds", timer.elapsed());
#endif
    qDebug("-------- start play thread(audio device initial) exit,ret=%d.", ret);
}