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Adding functionality for adding filters during execution

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7650 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
anders 2002-10-07 10:46:01 +00:00
parent 1b19920692
commit f8e93e8037
2 changed files with 46 additions and 4 deletions
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32
libaf/af.c
View File

@ -156,7 +156,9 @@ void af_remove(af_stream_t* s, af_instance_t* af)
free(af);
}
/* Reinitializes all filters downstream from the filter given in the argument */
/* Reinitializes all filters downstream from the filter given in the
argument the return value is AF_OK if success and AF_ERROR if
failure */
int af_reinit(af_stream_t* s, af_instance_t* af)
{
if(!af)
@ -364,6 +366,31 @@ int af_init(af_stream_t* s)
return 0;
}
/* Add filter during execution. This function adds the filter "name"
to the stream s. The filter will be inserted somewhere nice in the
list of filters. The return value is a pointer to the new filter,
If the filter couldn't be added the return value is NULL. */
af_instance_t* af_add(af_stream_t* s, char* name){
af_instance_t* new;
// Sanity check
if(!s || !s->first || !name)
return NULL;
// Insert the filter somwhere nice
if(!strcmp(s->first->info->name,"format"))
new = af_append(s, s->first, name);
else
new = af_prepend(s, s->first, name);
if(!new)
return NULL;
// Reinitalize the filter list
if(AF_OK != af_reinit(s, s->first)){
free(new);
return NULL;
}
return new;
}
// Filter data chunk through the filters in the list
af_data_t* af_play(af_stream_t* s, af_data_t* data)
{
@ -451,9 +478,6 @@ int af_calc_insize_constrained(af_stream_t* s, int len,
in+=t;
}
// printf("Could no meet constraint nr 3. in=%d out=%d len=%d max_in=%d max_out=%d",
// in,out,len,max_insize,max_outsize);
// Could no meet constraint nr 3.
while(out > max_outsize || in > max_insize){
in-=t;

18
libaf/af.h
View File

@ -138,19 +138,37 @@ typedef struct af_stream_s
stream will be reinitialized. The return value is 0 if sucess and
-1 if failure */
int af_init(af_stream_t* s);
// Uninit and remove all filters
void af_uninit(af_stream_t* s);
/* Add filter during execution. This function adds the filter "name"
to the stream s. The filter will be inserted somewhere nice in the
list of filters. The return value is a pointer to the new filter,
If the filter couldn't be added the return value is NULL. */
af_instance_t* af_add(af_stream_t* s, char* name);
// Uninit and remove the filter "af"
void af_remove(af_stream_t* s, af_instance_t* af);
/* Find filter in the dynamic filter list using it's name This
function is used for finding already initialized filters */
af_instance_t* af_get(af_stream_t* s, char* name);
// Filter data chunk through the filters in the list
af_data_t* af_play(af_stream_t* s, af_data_t* data);
/* Calculate how long the output from the filters will be given the
input length "len". The calculated length is >= the actual
length */
int af_outputlen(af_stream_t* s, int len);
/* Calculate how long the input to the filters should be to produce a
certain output length, i.e. the return value of this function is
the input length required to produce the output length "len". The
calculated length is <= the actual length */
int af_inputlen(af_stream_t* s, int len);
/* Calculate how long the input IN to the filters should be to produce
a certain output length OUT but with the following three constraints:
1. IN <= max_insize, where max_insize is the maximum possible input