ES from a custom module: demux to decoder
Posted: 20 Jun 2012 00:53
Within the Open() method of a custom demux module, I assume that the
stream must be added, es_out_Add( ) before sending data to it using es_out_Send().
Is that true?
Is a decoder module invoked by specifying the codec type, i_codec = ?
As shown by the ??? in the code snippet, how do you specify a custom decoder, eg. MyDecoder?
There is an include file called vlc_fourcc.h, should this file be modified?
How does a RGBA image get rendered from a decoder module?
As shown in the png.c module, if the DecodeBlock() returns with a picture_t variable,
does the image get immediately rendered in an output window?
Where is the window initially spawned from a file such as image.png.
Is it the Access or Demux module?
stream must be added, es_out_Add( ) before sending data to it using es_out_Send().
Is that true?
Is a decoder module invoked by specifying the codec type, i_codec = ?
As shown by the ??? in the code snippet, how do you specify a custom decoder, eg. MyDecoder?
There is an include file called vlc_fourcc.h, should this file be modified?
Code: Select all
struct demux_sys_t
{
es_format_t fmt;
es_out_id_t *p_es;
...
};
static int Open( vlc_object_t * p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
....
p_demux->p_sys = p_sys;
...
// Set the Elementary Stream Format
es_format_Init( &p_sys->fmt, VIDEO_ES, 0 );
p_sys->fmt.i_codec = ???;
p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
}As shown in the png.c module, if the DecodeBlock() returns with a picture_t variable,
does the image get immediately rendered in an output window?
Code: Select all
static int OpenDecoder( vlc_object_t *p_this )
{
...
/* Set output properties */
p_dec->fmt_out.i_cat = VIDEO_ES;
p_dec->fmt_out.i_codec = VLC_CODEC_RGBA;
/* Set callbacks */
p_dec->pf_decode_video = DecodeBlock;
return VLC_SUCCESS;
}Is it the Access or Demux module?