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|
BEGIN_EVENT_TABLE(Player, wxPanel)
EVT_PAINT( Player::OnPaint )
EVT_IDLE(Player::OnIdle)
EVT_ERASE_BACKGROUND(Player::OnEraseBackground)
END_EVENT_TABLE()
Player::Player(wxWindow *frame)
:
wxPanel(frame)
{
//---------------------------------
av_register_all();
if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) {
fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
}
// Open video file
if(av_open_input_file(&pFormatCtx, "test.avi", NULL, 0, NULL)!=0)
printf( "Couldn't open file \n"); // Couldn't open file
if(av_find_stream_info(pFormatCtx)<0)
printf( "Couldn't find stream information\n");
dump_format(pFormatCtx, 0, "test.avi", 0);
// Find the first video stream
videoStream=-1;
for(i=0; i<pFormatCtx->nb_streams; i++)
if(pFormatCtx->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO) {
videoStream=i;
break;
}
if(videoStream==-1)
printf( "Didn't find a video stream\n"); // Didn't find a video stream
// Get a pointer to the codec context for the video stream
pCodecCtx=pFormatCtx->streams[videoStream]->codec;
// Find the decoder for the video stream
pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
if(pCodec==NULL) {
fprintf(stderr, "Unsupported codec!\n");
}
// Open codec
if(avcodec_open(pCodecCtx, pCodec)<0)
printf( "Could not open codec");// Could not open codec
// Allocate video frame
pFrame=avcodec_alloc_frame();
#ifndef __DARWIN__
screen = SDL_SetVideoMode(pCodecCtx->width, pCodecCtx->height, 0, 0);
#else
screen = SDL_SetVideoMode(pCodecCtx->width, pCodecCtx->height, 24, 0);
#endif
if(!screen) {
fprintf(stderr, "SDL: could not set video mode - exiting\n");
exit(1);
}
// Allocate a place to put our YUV image on that screen
bmp = SDL_CreateYUVOverlay(pCodecCtx->width,
pCodecCtx->height,
SDL_YV12_OVERLAY,
screen);
//------------------------------------------
m_width = pCodecCtx->width ;
m_height = pCodecCtx->height;
// ensure the size of the wxPanel
wxSize size(m_width, m_height);
SetMinSize(size);
SetMaxSize(size);
}
void Player::OnPaint(wxPaintEvent& event)
{
// create a bitmap from our pixel data
m_Bitmap = wxBitmap(wxImage(m_width, m_height,
static_cast<unsigned char *>(screen->pixels), true));
wxBufferedPaintDC dc(this, m_Bitmap);
}
void Player::OnIdle(wxIdleEvent& event)
{
i=0;
if(av_read_frame(pFormatCtx, &packet)>=0){
// Is this a packet from the video stream?
if(packet.stream_index==videoStream) {
// Decode video frame
avcodec_decode_video(pCodecCtx, pFrame, &frameFinished,
packet.data, packet.size);
// Did we get a video frame?
if(frameFinished) {
SDL_LockYUVOverlay(bmp);
AVPicture pict;
pict.data[0] = bmp->pixels[0];
pict.data[1] = bmp->pixels[2];
pict.data[2] = bmp->pixels[1];
pict.linesize[0] = bmp->pitches[0];
pict.linesize[1] = bmp->pitches[2];
pict.linesize[2] = bmp->pitches[1];
// Convert the image into YUV format that SDL uses
img_convert(&pict, PIX_FMT_YUV420P,
(AVPicture *)pFrame, pCodecCtx->pix_fmt,
pCodecCtx->width, pCodecCtx->height);
SDL_UnlockYUVOverlay(bmp);
rect.x = 0;
rect.y = 0;
rect.w = pCodecCtx->width;
rect.h = pCodecCtx->height;
SDL_DisplayYUVOverlay(bmp, &rect);
}
}
}
Refresh(false);
}
void Player::OnEraseBackground(wxEraseEvent& event)
{
}
Player::~Player()
{
av_free_packet(&packet);
av_free(pFrame);
avcodec_close(pCodecCtx);
av_close_input_file(pFormatCtx);
SDL_Quit();
} |
