// This is how it's done!
http://lists.debian.org/debian-user-spanish/2005/01/msg00380.html
==========================================================================
TASKS (client)
==========================================================================
MessageBox:
[x] - Make it.
[x] - Make icons.
[x] - Test it.
SplashScreen:
[ ] - Make it.
Mainwindow:
[x] - Clean out mgui code.
[x] - Make generic gui layout code.
[x] - Make icons.
[x] - Make statusbar.
[x] - Make flashing record bar.
[ ] - Show network connection status in statusbar.
[ ] - Show camera connection status in statusbar.
[x] - Save movie messagebox (yes/no/dunno)
[x] - Create snapshot thumbnails from dv stream instead of the widget.
[x] - Make sure the same frame is shown in thumbnail as the one actually
shot on the server.
[ ] - Test it.
CPRQueryDialog:
[x] - Make it!
[x] - Clean out unnesessary code.
[x] - Make cancel posibility (return code 0 should do something useful)
[x] - Insert timer for network connection timeout.
[x] - Send connection status info to mainwindow.
[x] - Make icon (backspace)
[ ] - Test it.
Encoder:
[x] - Send savestate signal.
[x] - Make all data sent before deleting network object. (flush)
[x] - Remove ffmpeg code.
[x] - Make use of 2.6 kernel (through raw1394)
Decoder:
[ ] - Enable sound decoding for the network stream.
[x] - Remove ffmpeg code.
[x] - Make use of 2.6 kernel (through raw1394)
[x] - Set flags on frame objects.
Camera:
[x] - Add initialize method (constructor should do nothing).
[%] - Add getStatus methods. (implemented through error object)
Player:
[x] - Remove ffmpeg code.
[x] - Use libdv for dv decoding
==========================================================================
TASKS (server)
==========================================================================
ImgEncoder:
[x] - Make libjpeg calls work again.
MovEncoder:
[x] - Test Mpeg4. (no good)
[ ] - Remove ffmpeg code.
[ ] - Enable sound.
Main:
[ ] - Save movie signal handling.
[x] - Read server root folder from config.
[x] - Use correct filenames and paths.
[x] - Check for writabilty before trying to do any writing.
[x] - Create fallback, when unable to write the requested filename.
==========================================================================
TASKS (common)
==========================================================================
Makesystem:
[x] - "Port" to automake/autoconf
[x] - Make LibSDL detection in configure script
[x] - Make LibJpeg detection in configure script
[ ] - Make ffmpeg detection in configure script
[x] - Make server standalone compilable (through flag to configure)
[x] - Include pixmaps and tools in distdir.
[x] - Make pixmaps correctly intalled.
[x] - Make QT link correctly on fedora core 1
[x] - Make libJpeg link correctly on fedora core 1
[x] - Make configuration files installed in $(prefix)/etc/miav
MiavConfig:
[x] - Integrate file parser.
[x] - Use error object.
[ ] - Make code for input validity test.
[x] - Initialize one global configuration object.
ErrorObject:
[x] - Make it.
[x] - Maintain error string stack, instead of appending.
[x] - Make it thread safe.
[x] - Make pushError take any number parameters and parse them on to sprintf
[ ] - Make it a superclass.
[ ] - Create a textmode version subclass (for the server).
[ ] - Create a QT version subclass (callback to mainwindow with messagebox).
[ ] - Append to log, whenever error occur.
FFMpegWrapper:
[%] - Make it.(FFMPEG is on its way out of the project)
==========================================================================
SAVE THE MOVIE?
==========================================================================
When the stop button is clicked, a msg box pops up, "Save? [yes, no, dunno]"
network connection is no killed before this has been answered, and an empty
frame has been send to the server with the answer.
On the serverside, a variable describing wether the file is to be saved (SAVE),
deleted (DELETE), og scheduled for later descision (LATER).
It is initialized with LATER, in order to prevent errors due to a malfunction
leading to a disconnection.
If a flag is recieved, the state is overwritten.
If the state is SAVE, when the connection is terminated, the file is moved to
a folder containing permanent data store.
If the state is DELETE, the file is moved to a folder containing files scheduled
for deletion, when more space is needed (no files are removed at this point)
If the state is LATER, the file is moved to a folder containing files with this
purpose.
A cron job examines this folder regularly (test how often).
If a file has been here for more than a week, the administrator is contacted by
email.
==========================================================================
Semphores and mutexes in the client network architechture
==========================================================================
,-----------.
| DV stream |
`-----------'
|
V
,-----------.
| Decoder |
`-----------'
| \
V \
,-----------. \
| Player | \
`-----------' \
\ ,-----------.
->| Encoder |
`-----------'
==========================================================================
This code should convert yuv to yuv422 planar
==========================================================================
int Frame::ExtractYUV420( uint8_t *yuv, uint8_t *output[ 3 ] )
{
unsigned char *pixels[ 3 ];
int pitches[ 3 ];
int width = GetWidth(), height = GetHeight();
pixels[ 0 ] = ( unsigned char* ) yuv;
pitches[ 0 ] = decoder->width * 2;
dv_decode_full_frame( decoder, data, e_dv_color_yuv, pixels, pitches );
int w2 = width / 2;
uint8_t *y = output[ 0 ];
uint8_t *cb = output[ 1 ];
uint8_t *cr = output[ 2 ];
uint8_t *p = yuv;
for ( int i = 0; i < height; i += 2 )
{
/* process two scanlines (one from each field, interleaved) */
for ( int j = 0; j < w2; j++ )
{
/* packed YUV 422 is: Y[i] U[i] Y[i+1] V[i] */
*( y++ ) = *( p++ );
*( cb++ ) = *( p++ );
*( y++ ) = *( p++ );
*( cr++ ) = *( p++ );
}
/* process next two scanlines (one from each field, interleaved) */
for ( int j = 0; j < w2; j++ )
{
/* skip every second line for U and V */
*( y++ ) = *( p++ );
p++;
*( y++ ) = *( p++ );
p++;
}
}
}