基于FFmpeg h264_rkmpp 解码应用的提问 - Toybrick

while (1)
{
AVPacket *input_packet = av_packet_alloc();
if (!input_packet)
{
qDebug("failed to allocated memory for AVPacket");
return;
}
res_send = av_read_frame(decoder->avfc, input_packet);
// qDebug("Status while %d av_read_frame %s ===%d", send_packet_count++,av_err2str(res_send),res_send);
// qDebug("Packet size = %d stream_index = %d", input_packet->size,input_packet->stream_index);
if (res_send<0 ){
break;
}
// stream_index =0 是音频流，1是视频流
if(input_packet->stream_index == 1){
//qDebug("input_packet = %d %d",input_packet->size,input_packet->pos);
qDebug("Packet size = %d stream_index = %d flags =%d", input_packet->size,input_packet->stream_index,input_packet->flags);
t.restart();
int response = avcodec_send_packet(decoder->video_avcc, input_packet);
if (response < 0) {
// qDebug("Error while sending packet to decoder: %s", av_err2str(response));
qDebug("Error <0 while %d sending packet to decoder: %s", send_packet_count++,av_err2str(response));
// av_packet_unref(input_packet);
// break;
}
response = 0;
while (response >= 0)
{
receive_frame_count = 0;
// AVFrame *input_frame = av_frame_alloc();
response = avcodec_receive_frame(decoder->video_avcc, input_frame);
qDebug("input_frame pkt_size = %d flags =%d", input_frame->pkt_size,input_frame->flags);
qDebug("Error while %d avcodec_receive_frame : %s", receive_frame_count++,av_err2str(response));
if (response == AVERROR(EAGAIN) || response == AVERROR_EOF)
{
// qDebug("Error == AVERROR_EOF or AVERROR(EAGAIN) while %d avcodec_receive_frame : %s", receive_frame_count++,av_err2str(ret));
break;
}
else if (response < 0)
{
// qDebug("Error <0 while %d avcodec_receive_frame : %s", receive_frame_count++,av_err2str(ret));
// qDebug("Error while receiving frame from decoder: %s", av_err2str(response));
av_frame_unref(input_frame);
break;
}
else if (response >= 0)
{
// qDebug("Error >= 0 while %d avcodec_receive_frame : %s", receive_frame_count++,av_err2str(ret));
//qDebug("DECODER SUCESS %d %d %d",input_frame->format,input_frame->width,
// input_frame->height);
// retrieve data from GPU to CPU
int err = av_hwframe_transfer_data(
pFrameOK, // The frame that will contain the usable data.
input_frame, // Frame returned by avcodec_receive_frame()
0);
qDebug("pFrameOK size = %d flags =%d", pFrameOK->pkt_size,pFrameOK->flags);
int sws_ret = sws_scale(img_convert_ctx,
pFrameOK->data,
pFrameOK->linesize, 0, decoder->video_avcc->height, pFrameRGB->data,
pFrameRGB->linesize);
QImage * tmpImg =new QImage ((uchar *)pFrameRGB->data[0], decoder->video_avcc->width, decoder->video_avcc->height, QImage::Format_RGB32);
//qDebug()<<QDateTime::currentDateTime().toString("hh:mm:ss zzz");
*tmpImg = tmpImg->scaled(1209, 734, Qt::KeepAspectRatioByExpanding, Qt::FastTransformation);
//QImage image = tmpImg.copy(); //把图像复制一份传递给界面显示
//QPixmap pixmaptemp = QPixmap::fromImage(tmpImg);
//pixmap.scaled(QSize(1209,723), Qt::KeepAspectRatio);
int el = t.elapsed();
int interval = 1000 / 25 - el > 0 ? 1000 / 25 - el : 0;
//qDebug()<<interval;
msleep(interval);
emit sig_GetOneFrame(*tmpImg); //发送信号
delete tmpImg;
av_frame_unref(input_frame);
}
}
}
av_packet_unref(input_packet);
av_packet_free(&input_packet);
}