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 "AVPlayer2/video_state.h"
#include "playercontroller.h"

StartPlayThread::StartPlayThread(PlayerController* playerController)
    : m_playerController(playerController)
{}

StartPlayThread::~StartPlayThread() {}

void StartPlayThread::stop()
{
    m_exit = true;
    m_cv.notify_all();
}

void StartPlayThread::run()
{
    assert(m_playerController);
    if (m_exit) return;
    bool ret = false;

    float vol = 1.0;
    AVSampleFormat sample_fmt = AV_SAMPLE_FMT_S16; // play out format

    VideoStateData* pVideoStateData = m_playerController->videoStateData();
    if (pVideoStateData) {
        AVCodecContext* pAudio = pVideoStateData->get_contex(AVMEDIA_TYPE_AUDIO);
        VideoState* pState = pVideoStateData->get_state();
        if (pAudio) {
            auto* pThread = m_playerController->audioPlayThread();
            if (pThread) {
                ret = pThread->init_device(pAudio->sample_rate,
                                           pAudio->ch_layout.nb_channels,
                                           sample_fmt,
                                           vol); // pAudio->sample_fmt
                if (ret) {
                    ret = pThread->init_resample_param(pAudio, sample_fmt, pState);
                }
            }
        }
    }
    // 可加回调或日志
}