//vlcTest.cpp : 定义控制台应用程序的入口点。//#include"stdafx.h"#include#include"vlc/vlc.h"#include#include#include#includeQMutex g_mutex;bool g_isInit = false;int IMG_WIDTH = 640;int IMG_HEIGHT = 480;char in_buffer[640*480*4];char out_buffer[640*480*4];
FILE*local;int frameNum = 0;const char* TestFile = "b040_20170106.dat";//
/**
\brief Callback method triggered by VLC to get image data from
a custom memory source. This is used to tell VLC where the
data is and to allocate buffers as needed.
To set this callback, use the "--imem-get="
option, with memory_address the address of this function in memory.
When using IMEM, be sure to indicate the format for your data
using "--imem-cat=2" where 2 is video. Other options for categories are
0 = Unknown,
1 = Audio,
2 = Video,
3 = Subtitle,
4 = Data
When creating your media instance, use libvlc_media_new_location and
set the location to "imem:/" and then play.
\param[in] data Pointer to user-defined data, this is your data that
you set by passing the "--imem-data=" option when
initializing VLC instance.
\param[in] cookie A user defined string. This works the same way as
data, but for string. You set it by adding the "--imem-cookie="
option when you initialize VLC. Use this when multiple VLC instances are
running.
\param[out] dts The decode timestamp, value is in microseconds. This value
is the time when the frame was decoded/generated. For example, 30 fps
video would be every 33 ms, so values would be 0, 33333, 66666, 99999, etc.
\param[out] pts The presentation timestamp, value is in microseconds. This
value tells the receiver when to present the frame. For example, 30 fps
video would be every 33 ms, so values would be 0, 33333, 66666, 99999, etc.
\param[out] flags Unused,ignore.
\param[out] bufferSize Use this to set the size of the buffer in bytes.
\param[out] buffer Change to point to your encoded frame/audio/video data.
The codec format of the frame is user defined and set using the
"--imem-codec=," where 4 letter is the code for your
codec of your source data.*/
int MyImemGetCallback (void *data,const char *cookie,
int64_t*dts,
int64_t*pts,
unsigned*flags,
size_t*bufferSize,void **buffer)
{static int64_t _dts = 0, _pts = 0;if (!g_isInit){/*load local file*/local= fopen(TestFile,"rb");if (!local){return true;
}
size_t count= fread(in_buffer,1,IMG_WIDTH*IMG_HEIGHT*4,local);*bufferSize =count;*buffer =in_buffer;
g_isInit= true;*dts = _dts; *pts =_pts;
_dts+=30; _pts+=30;return 0;
}
size_t count= fread(in_buffer,1,IMG_WIDTH*IMG_HEIGHT*4,local);*bufferSize =count;*buffer =in_buffer;*dts = _dts; *pts =_pts;
_dts+=30; _pts+=30;if(count>0) {
printf("read %d bytes\n",count);return 0;
}else{return true; /*eof*/}
}/**
\brief Callback method triggered by VLC to release memory allocated
during the GET callback.
To set this callback, use the "--imem-release="
option, with memory_address the address of this function in memory.
\param[in] data Pointer to user-defined data, this is your data that
you set by passing the "--imem-data=" option when
initializing VLC instance.
\param[in] cookie A user defined string. This works the same way as
data, but for string. You set it by adding the "--imem-cookie="
option when you initialize VLC. Use this when multiple VLC instances are
running.
\param[int] bufferSize The size of the buffer in bytes.
\param[out] buffer Pointer to data you allocated or set during the GET
callback to handle or delete as needed.*/
int MyImemReleaseCallback (void *data,const char *cookie,
size_t bufferSize,void *buffer)
{//Since I did not allocate any new memory, I don't need//to delete it here. However, if you did in your get method, you//should delete/free it here.
return 0;
}//
int main(int argc, char*argv[])
{
libvlc_instance_t*inst;
libvlc_media_player_t*mp;
libvlc_media_t*m;
libvlc_time_t length;int wait_time=5000;
std::vectoroptions;
std::vector::iterator option;
options.push_back("--no-video-title-show");char imemDataArg[256];
sprintf(imemDataArg,"--imem-data=%#p", in_buffer);
options.push_back(imemDataArg);char imemGetArg[256];
sprintf(imemGetArg,"--imem-get=%#p", MyImemGetCallback);
options.push_back(imemGetArg);char imemReleaseArg[256];
sprintf(imemReleaseArg,"--imem-release=%#p", MyImemReleaseCallback);
options.push_back(imemReleaseArg);
options.push_back("--imem-cookie=\"IMEM\"");
options.push_back("--imem-codec=H264");//Video data.
options.push_back("--imem-cat=2");/*Load the VLC engine*/inst= libvlc_new (int(options.size()), options.data());//Configure any transcoding or streaming//options for the media source.
options.clear();//Create a media item from file
m = libvlc_media_new_location (inst, "imem://"); /*##use memory as input*/
//Set media options
for(option = options.begin(); option != options.end(); option++){
libvlc_media_add_option(m,*option);
}/*Create a media player playing environment*/mp=libvlc_media_player_new_from_media (m);/*No need to keep the media now*/libvlc_media_release (m);//play the media_player
libvlc_media_player_play (mp);//wait until the tracks are created
_sleep (wait_time);
length=libvlc_media_player_get_length(mp);
IMG_WIDTH=libvlc_video_get_width(mp);
IMG_HEIGHT=libvlc_video_get_height(mp);
printf("Stream Duration: %ds\n",length/1000);
printf("Resolution: %d x %d\n",IMG_WIDTH,IMG_HEIGHT);//Let it play
_sleep (length-wait_time);//Stop playing
libvlc_media_player_stop (mp);//Free the media_player
libvlc_media_player_release (mp);
libvlc_release (inst);return 0;
}