chenke

2017-08-09 2a12817d4ae31a591f788f3fbb82916e385e9e2d

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#include "PL_V4L2Source.h" 
#include "MaterialBuffer.h" 
#include "logger.h" 
#include "MediaHelper.h" 
 
#include <linux/videodev2.h> 
#include <V4l2Device.h> 
#include <V4l2Capture.h> 
#include <V4l2Output.h> 
 
#include <libyuv.h> 
 
struct PL_V4L2Source_Internal 
{ 
    uint8_t* buffer; 
    int buffSize; 
    size_t buffSizeMax; 
    bool payError; 
 
    MB_Frame lastFrame; 
    PL_V4L2Source_Config config; 
 
    V4l2Capture* videoCapture; 
 
    PL_V4L2Source_Internal() :  
        buffer(nullptr), buffSize(0), buffSizeMax(0), payError(true),  
        lastFrame(), config(), 
        videoCapture(nullptr) 
    { 
    } 
     
    ~PL_V4L2Source_Internal() 
    { 
        delete[] buffer; 
        buffer = nullptr; 
    } 
     
    void reset() 
    { 
        buffSize = 0; 
        payError = true; 
 
        MB_Frame _lastFrame; 
        lastFrame = _lastFrame; 
         
        PL_V4L2Source_Config _config; 
        config = _config; 
 
        if (buffer != nullptr) 
        { 
            delete[] buffer; 
            buffer = nullptr; 
            buffSizeMax = 0; 
        } 
    } 
}; 
 
PipeLineElem* create_PL_V4L2Source() 
{ 
    return new PL_V4L2Source; 
} 
 
PL_V4L2Source::PL_V4L2Source() : internal(new PL_V4L2Source_Internal) 
{ 
} 
 
PL_V4L2Source::~PL_V4L2Source() 
{ 
    PL_V4L2Source_Internal* in = (PL_V4L2Source_Internal*)internal; 
    delete in; 
} 
 
bool PL_V4L2Source::init(void* args) 
{ 
    PL_V4L2Source_Internal* in = (PL_V4L2Source_Internal*)internal; 
    in->reset(); 
     
    if (args != nullptr) 
    { 
        PL_V4L2Source_Config* config = (PL_V4L2Source_Config*)args; 
        in->config = *config; 
    } 
 
    // init V4L2 capture interface 
    V4L2DeviceParameters param(in->config.device.c_str(), in->config.format, in->config.width, in->config.height, in->config.fps, 1+1); 
    in->videoCapture = V4l2Capture::create(param, (V4l2Access::IoType)in->config.ioType); 
 
    if (in->videoCapture != nullptr) 
    { 
        in->buffSizeMax = in->videoCapture->getBufferSize(); 
        in->buffer = new uint8_t[in->buffSizeMax]; 
    } 
 
    return in->videoCapture != nullptr; 
} 
 
void PL_V4L2Source::finit() 
{ 
    PL_V4L2Source_Internal* in = (PL_V4L2Source_Internal*)internal; 
 
    // close videoCapture 
    //#todo 
} 
 
bool PL_V4L2Source::pay(const PipeMaterial& pm) 
{ 
    return false; 
} 
 
bool PL_V4L2Source::gain(PipeMaterial& pm) 
{ 
    PL_V4L2Source_Internal* in = (PL_V4L2Source_Internal*)internal; 
 
    pm.former = this; 
    pm.deleter = nullptr; 
    pm.args = nullptr; 
 
    uint8_t tmpYUYV[in->config.width * in->config.height * 2]; 
    in->buffSize = in->videoCapture->read((char*)tmpYUYV, sizeof(tmpYUYV)); 
    if (in->buffSize <= 0 && errno != EAGAIN) 
    { 
        LOG(NOTICE) << "videoCapture stopped " << strerror(errno) << LOG_ENDL; 
        return false; 
    } 
 
    uint8_t* dst_y = (uint8_t*)(in->buffer); 
    uint8_t* dst_u = (uint8_t*)(dst_y + (in->config.width * in->config.height)); 
    uint8_t* dst_v = (uint8_t*)(dst_u + (in->config.width * in->config.height / 4)); 
 
    //libyuv::YUY2ToI420(tmpYUYV, in->config.width*2, 
    //                   dst_y, in->config.width, 
    //                   dst_u, MH_SUBSAMPLE1(in->config.width, 2), 
    //                   dst_v, MH_SUBSAMPLE1(in->config.width, 2), 
    //                   in->config.width, in->config.height 
    //                    ); 
    //in->lastFrame.type = MB_Frame::MBFT_YUV420; 
 
    libyuv::YUY2ToNV12(tmpYUYV, in->config.width*2, 
                       dst_y, in->config.width, 
                       dst_u, in->config.width, 
                       in->config.width, in->config.height 
    ); 
    in->lastFrame.type = MB_Frame::MBFT_NV12; 
 
    in->lastFrame.buffer = in->buffer; 
    in->lastFrame.buffSize = in->config.width * in->config.height * 1.5; 
    in->lastFrame.width = in->videoCapture->getWidth(); 
    in->lastFrame.height = in->videoCapture->getHeight(); 
    in->lastFrame.pts = microseconds_to_timeval(0); 
 
    pm.type = PipeMaterial::PMT_FRAME; 
    pm.buffer = &(in->lastFrame); 
    pm.buffSize = 0; 
 
    return true; 
}