mirror of https://github.com/mpv-player/mpv
509 lines
14 KiB
C
509 lines
14 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#include "../config.h"
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#include "../mp_msg.h"
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#include "af.h"
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// Static list of filters
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extern af_info_t af_info_dummy;
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extern af_info_t af_info_delay;
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extern af_info_t af_info_channels;
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extern af_info_t af_info_format;
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extern af_info_t af_info_resample;
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static af_info_t* filter_list[]={ \
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&af_info_dummy,\
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&af_info_delay,\
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&af_info_channels,\
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&af_info_format,\
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&af_info_resample,\
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NULL \
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};
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/* Find a filter in the static list of filters using it's name. This
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function is used internally */
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af_info_t* af_find(char*name)
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{
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int i=0;
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while(filter_list[i]){
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if(!strcmp(filter_list[i]->name,name))
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return filter_list[i];
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i++;
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}
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mp_msg(MSGT_AFILTER,MSGL_ERR,"Couldn't find audio filter '%s'\n",name);
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return NULL;
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}
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/* Find filter in the dynamic filter list using it's name This
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function is used for finding already initialized filters */
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af_instance_t* af_get(af_stream_t* s, char* name)
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{
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af_instance_t* af=s->first;
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// Find the filter
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while(af != NULL){
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if(!strcmp(af->info->name,name))
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return af;
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af=af->next;
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}
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return NULL;
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}
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// Function for creating a new filter of type name
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af_instance_t* af_create(af_stream_t* s, char* name)
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{
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// Allocate space for the new filter and reset all pointers
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af_instance_t* new=malloc(sizeof(af_instance_t));
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if(!new){
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mp_msg(MSGT_AFILTER,MSGL_ERR,"Could not allocate memory\n");
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return NULL;
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}
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memset(new,0,sizeof(af_instance_t));
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// Find filter from name
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if(NULL == (new->info=af_find(name)))
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return NULL;
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// Make sure that the filter is not already in the list if it is non-reentrant
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if(new->info->flags & AF_FLAGS_NOT_REENTRANT){
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if(af_get(s,name)){
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mp_msg(MSGT_AFILTER,MSGL_ERR,"There can only be one instance of the filter '%s' in each stream\n",name);
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free(new);
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return NULL;
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}
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}
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// Initialize the new filter
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if(AF_OK==new->info->open(new))
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return new;
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free(new);
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mp_msg(MSGT_AFILTER,MSGL_ERR,"Couldn't create audio filter '%s'\n",name);
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return NULL;
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}
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/* Create and insert a new filter of type name before the filter in the
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argument. This function can be called during runtime, the return
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value is the new filter */
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af_instance_t* af_prepend(af_stream_t* s, af_instance_t* af, char* name)
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{
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// Create the new filter and make sure it is OK
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af_instance_t* new=af_create(s,name);
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if(!new)
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return NULL;
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// Update pointers
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new->next=af;
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if(af){
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new->prev=af->prev;
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af->prev=new;
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}
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else
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s->last=new;
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if(new->prev)
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new->prev->next=new;
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else
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s->first=new;
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return new;
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}
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/* Create and insert a new filter of type name after the filter in the
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argument. This function can be called during runtime, the return
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value is the new filter */
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af_instance_t* af_append(af_stream_t* s, af_instance_t* af, char* name)
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{
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// Create the new filter and make sure it is OK
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af_instance_t* new=af_create(s,name);
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if(!new)
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return NULL;
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// Update pointers
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new->prev=af;
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if(af){
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new->next=af->next;
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af->next=new;
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}
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else
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s->first=new;
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if(new->next)
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new->next->prev=new;
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else
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s->last=new;
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return new;
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}
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// Uninit and remove the filter "af"
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void af_remove(af_stream_t* s, af_instance_t* af)
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{
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if(!af) return;
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// Detach pointers
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if(af->prev)
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af->prev->next=af->next;
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else
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s->first=af->next;
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if(af->next)
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af->next->prev=af->prev;
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else
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s->last=af->prev;
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// Uninitialize af and free memory
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af->uninit(af);
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free(af);
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}
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/* Reinitializes all filters downstream from the filter given in the
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argument the return value is AF_OK if success and AF_ERROR if
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failure */
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int af_reinit(af_stream_t* s, af_instance_t* af)
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{
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if(!af)
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return AF_ERROR;
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do{
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af_data_t in; // Format of the input to current filter
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int rv=0; // Return value
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// Check if this is the first filter
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if(!af->prev)
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memcpy(&in,&(s->input),sizeof(af_data_t));
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else
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memcpy(&in,af->prev->data,sizeof(af_data_t));
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// Reset just in case...
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in.audio=NULL;
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in.len=0;
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rv = af->control(af,AF_CONTROL_REINIT,&in);
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switch(rv){
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case AF_OK:
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break;
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case AF_FALSE:{ // Configuration filter is needed
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af_instance_t* new = NULL;
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// Insert channels filter
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if((af->prev?af->prev->data->nch:s->input.nch) != in.nch){
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// Create channels filter
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if(NULL == (new = af_prepend(s,af,"channels")))
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return AF_ERROR;
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// Set number of output channels
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if(AF_OK != (rv = new->control(new,AF_CONTROL_CHANNELS,&in.nch)))
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return rv;
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// Initialize channels filter
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if(!new->prev)
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memcpy(&in,&(s->input),sizeof(af_data_t));
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else
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memcpy(&in,new->prev->data,sizeof(af_data_t));
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if(AF_OK != (rv = new->control(new,AF_CONTROL_REINIT,&in)))
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return rv;
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}
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// Insert format filter
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if(((af->prev?af->prev->data->format:s->input.format) != in.format) ||
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((af->prev?af->prev->data->bps:s->input.bps) != in.bps)){
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// Create format filter
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if(NULL == (new = af_prepend(s,af,"format")))
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return AF_ERROR;
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// Set output format
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if(AF_OK != (rv = new->control(new,AF_CONTROL_FORMAT,&in)))
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return rv;
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// Initialize format filter
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if(!new->prev)
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memcpy(&in,&(s->input),sizeof(af_data_t));
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else
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memcpy(&in,new->prev->data,sizeof(af_data_t));
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if(AF_OK != (rv = new->control(new,AF_CONTROL_REINIT,&in)))
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return rv;
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}
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if(!new) // Should _never_ happen
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return AF_ERROR;
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af=new;
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break;
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}
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case AF_DETACH:{ // Filter is redundant and wants to be unloaded
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af_instance_t* aft=af->prev;
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af_remove(s,af);
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if(aft)
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af=aft;
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else
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af=s->first; // Restart configuration
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break;
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}
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default:
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mp_msg(MSGT_AFILTER,MSGL_ERR,"Reinitialization did not work, audio filter '%s' returned error code %i\n",af->info->name,rv);
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return AF_ERROR;
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}
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af=af->next;
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}while(af);
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return AF_OK;
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}
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// Uninit and remove all filters
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void af_uninit(af_stream_t* s)
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{
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while(s->first)
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af_remove(s,s->first);
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}
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/* Initialize the stream "s". This function creates a new filter list
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if necessary according to the values set in input and output. Input
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and output should contain the format of the current movie and the
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formate of the preferred output respectively. The function is
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reentrant i.e. if called with an already initialized stream the
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stream will be reinitialized. The return value is 0 if success and
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-1 if failure */
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int af_init(af_stream_t* s)
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{
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int cfg=SLOW; // configuration type
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int i=0;
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// Sanity check
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if(!s) return -1;
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// Precaution in case caller is misbehaving
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s->input.audio = s->output.audio = NULL;
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s->input.len = s->output.len = 0;
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// Figure out how fast the machine is
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if(s->cfg.force)
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cfg=s->cfg.force;
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else{
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# if defined(HAVE_SSE) || defined(HAVE_3DNOWEX)
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cfg=FAST;
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# else
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cfg=SLOW;
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# endif
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}
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// Check if this is the first call
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if(!s->first){
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// Add all filters in the list (if there are any)
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if(!s->cfg.list){ // To make automatic format conversion work
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if(!af_append(s,s->first,"dummy"))
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return -1;
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}
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else{
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while(s->cfg.list[i]){
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if(!af_append(s,s->last,s->cfg.list[i++]))
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return -1;
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}
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}
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}
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// Init filters
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if(AF_OK != af_reinit(s,s->first))
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return -1;
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// Check output format
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if(cfg!=FORCE){
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af_instance_t* af = NULL; // New filter
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// Check output frequency if not OK fix with resample
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if(s->last->data->rate!=s->output.rate){
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if(NULL==(af=af_get(s,"resample"))){
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if(cfg==SLOW){
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if(!strcmp(s->first->info->name,"format"))
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af = af_append(s,s->first,"resample");
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else
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af = af_prepend(s,s->first,"resample");
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}
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else{
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if(!strcmp(s->last->info->name,"format"))
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af = af_prepend(s,s->last,"resample");
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else
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af = af_append(s,s->last,"resample");
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}
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}
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// Init the new filter
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if(!af || (AF_OK != af->control(af,AF_CONTROL_RESAMPLE,&(s->output.rate))))
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return -1;
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if(AF_OK != af_reinit(s,af))
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return -1;
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}
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// Check number of output channels fix if not OK
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// If needed always inserted last -> easy to screw up other filters
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if(s->last->data->nch!=s->output.nch){
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if(!strcmp(s->last->info->name,"format"))
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af = af_prepend(s,s->last,"channels");
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else
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af = af_append(s,s->last,"channels");
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// Init the new filter
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if(!af || (AF_OK != af->control(af,AF_CONTROL_CHANNELS,&(s->output.nch))))
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return -1;
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if(AF_OK != af_reinit(s,af))
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return -1;
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}
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// Check output format fix if not OK
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if((s->last->data->format != s->output.format) ||
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(s->last->data->bps != s->output.bps)){
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if(strcmp(s->last->info->name,"format"))
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af = af_append(s,s->last,"format");
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else
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af = s->last;
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// Init the new filter
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if(!af ||(AF_OK != af->control(af,AF_CONTROL_FORMAT,&(s->output))))
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return -1;
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if(AF_OK != af_reinit(s,af))
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return -1;
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}
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// Re init again just in case
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if(AF_OK != af_reinit(s,s->first))
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return -1;
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if((s->last->data->format != s->output.format) ||
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(s->last->data->bps != s->output.bps) ||
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(s->last->data->nch != s->output.nch) ||
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(s->last->data->rate != s->output.rate)) {
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// Something is stuffed audio out will not work
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mp_msg(MSGT_AFILTER,MSGL_ERR,"Unable to setup filter system can not meet sound-card demands, please report this error on MPlayer development mailing list. \n");
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af_uninit(s);
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return -1;
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}
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}
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return 0;
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}
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/* Add filter during execution. This function adds the filter "name"
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to the stream s. The filter will be inserted somewhere nice in the
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list of filters. The return value is a pointer to the new filter,
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If the filter couldn't be added the return value is NULL. */
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af_instance_t* af_add(af_stream_t* s, char* name){
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af_instance_t* new;
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// Sanity check
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if(!s || !s->first || !name)
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return NULL;
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// Insert the filter somwhere nice
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if(!strcmp(s->first->info->name,"format"))
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new = af_append(s, s->first, name);
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else
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new = af_prepend(s, s->first, name);
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if(!new)
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return NULL;
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// Reinitalize the filter list
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if(AF_OK != af_reinit(s, s->first)){
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free(new);
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return NULL;
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}
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return new;
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}
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// Filter data chunk through the filters in the list
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af_data_t* af_play(af_stream_t* s, af_data_t* data)
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{
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af_instance_t* af=s->first;
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// Iterate through all filters
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do{
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data=af->play(af,data);
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af=af->next;
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}while(af);
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return data;
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}
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/* Helper function used to calculate the exact buffer length needed
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when buffers are resized. The returned length is >= than what is
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needed */
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inline int af_lencalc(frac_t mul, af_data_t* d){
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register int t = d->bps*d->nch;
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return t*(((d->len/t)*mul.n)/mul.d + 1);
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}
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/* Calculate how long the output from the filters will be given the
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input length "len". The calculated length is >= the actual
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length. */
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int af_outputlen(af_stream_t* s, int len)
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{
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int t = s->input.bps*s->input.nch;
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af_instance_t* af=s->first;
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register frac_t mul = {1,1};
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// Iterate through all filters
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do{
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mul.n *= af->mul.n;
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mul.d *= af->mul.d;
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af=af->next;
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}while(af);
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return t * (((len/t)*mul.n + 1)/mul.d);
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}
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/* Calculate how long the input to the filters should be to produce a
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certain output length, i.e. the return value of this function is
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the input length required to produce the output length "len". The
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calculated length is <= the actual length */
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int af_inputlen(af_stream_t* s, int len)
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{
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int t = s->input.bps*s->input.nch;
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af_instance_t* af=s->first;
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register frac_t mul = {1,1};
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// Iterate through all filters
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do{
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mul.n *= af->mul.n;
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mul.d *= af->mul.d;
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af=af->next;
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}while(af);
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return t * (((len/t) * mul.d - 1)/mul.n);
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}
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/* Calculate how long the input IN to the filters should be to produce
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a certain output length OUT but with the following three constraints:
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1. IN <= max_insize, where max_insize is the maximum possible input
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block length
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2. OUT <= max_outsize, where max_outsize is the maximum possible
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output block length
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3. If possible OUT >= len.
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Return -1 in case of error */
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int af_calc_insize_constrained(af_stream_t* s, int len,
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int max_outsize,int max_insize)
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{
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int t = s->input.bps*s->input.nch;
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int in = 0;
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int out = 0;
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af_instance_t* af=s->first;
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register frac_t mul = {1,1};
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// Iterate through all filters and calculate total multiplication factor
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do{
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mul.n *= af->mul.n;
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mul.d *= af->mul.d;
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af=af->next;
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}while(af);
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in = t * (((len/t) * mul.d - 1)/mul.n);
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if(in>max_insize) in=t*(max_insize/t);
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// Try to meet constraint nr 3.
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while((out=t * (((in/t+1)*mul.n - 1)/mul.d)) <= max_outsize && in<=max_insize){
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if( (t * (((in/t)*mul.n))/mul.d) >= len) return in;
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in+=t;
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}
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// Could no meet constraint nr 3.
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while(out > max_outsize || in > max_insize){
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in-=t;
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if(in<t) return -1; // Input parameters are probably incorrect
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out = t * (((in/t)*mul.n + 1)/mul.d);
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}
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return in;
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}
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/* Helper function called by the macro with the same name this
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function should not be called directly */
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inline int af_resize_local_buffer(af_instance_t* af, af_data_t* data)
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{
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// Calculate new length
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register int len = af_lencalc(af->mul,data);
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mp_msg(MSGT_AFILTER,MSGL_V,"Reallocating memory in module %s, old len = %i, new len = %i\n",af->info->name,af->data->len,len);
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// If there is a buffer free it
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if(af->data->audio)
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free(af->data->audio);
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// Create new buffer and check that it is OK
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af->data->audio = malloc(len);
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if(!af->data->audio){
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mp_msg(MSGT_AFILTER,MSGL_ERR,"Could not allocate memory \n");
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return AF_ERROR;
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}
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af->data->len=len;
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return AF_OK;
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}
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