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mpv/libaf/af_ladspa.c

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/* ------------------------------------------------------------------------- */
/*
* af_ladspa.c, LADSPA plugin loader
*
* Written by Ivo van Poorten <ivop@euronet.nl>
* Copyright (C) 2004, 2005
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*
* Changelog
*
* 2004-12-23 Added to CVS
* 2004-12-22 Cleaned up cosmetics
* Made conversion loops in play() more cache-friendly
* 2004-12-20 Fixed bug for stereo effect on mono signal
* (trivial >1 to >=1 change; would segfault otherwise :-) )
* Removed trailing whitespace and fixed warn/err messages
* Have CONTROL_REINIT return a proper value
* 2004-12-13 More Doxygen comments
* 2004-12-12 Made af_ladspa optional (updated configure, af.c, etc.)
* 2004-12-11 Added deactivate and cleanup to uninit.
* Finished Doxygen comments.
* Moved translatable messages to help_mp-en.h
* 2004-12-10 Added ranges to list of controls for ease of use.
* Fixed sig11 bug. Implemented (dummy) outputcontrols. Some
* perfectly normal audio processing filters also have output
* controls.
* 2004-12-08 Added support for generators (no input, one output)
* Added support for stereo effects
* Added LADSPA_PATH support!
* 2004-12-07 Fixed changing buffersize. Now it's really working, also in
* real-time.
* 2004-12-06 First working version, mono-effects (1 input --> 1 output) only
* 2004-12-05 Started, Loading of plugin/label, Check inputs/outputs/controls
* Due to lack of documentation, I studied the ladspa_sdk source
* code and the loader code of Audacity (by Dominic Mazzoni). So,
* certain similarities in (small) pieces of code are not
* coincidental :-) No C&P jobs though!
*
*/
/* ------------------------------------------------------------------------- */
/* Global Includes */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <math.h>
#include <limits.h>
#include <dlfcn.h>
#include <ladspa.h>
/* ------------------------------------------------------------------------- */
/* Local Includes */
#include "af.h"
#include "../mp_msg.h"
#include "../help_mp.h"
/* ------------------------------------------------------------------------- */
/* Defines */
/* why, o why, wasn't it defined like this in the first place? */
#define MSGT_AF MSGT_AFILTER
/* ------------------------------------------------------------------------- */
/* Filter specific data */
typedef struct af_ladspa_s
{
int status; /**< Status of the filter.
* Either AF_OK or AF_ERROR
* Because MPlayer re-inits audio filters that
* _clearly_ returned AF_ERROR anyway, I use this
* in play() to skip the processing and return
* the data unchanged.
*/
int activated; /**< 0 or 1. Activate LADSPA filters only once, even
* if the buffers get resized, to avoid a stuttering
* filter.
*/
char *file;
char *label;
char *myname; /**< It's easy to have a concatenation of file and label */
void *libhandle;
const LADSPA_Descriptor *plugin_descriptor;
int nports;
int ninputs;
int *inputs;
int noutputs;
int *outputs;
int ninputcontrols;
int *inputcontrolsmap; /**< Map input port number [0-] to actual port */
float *inputcontrols;
int noutputcontrols;
int *outputcontrolsmap;
float *outputcontrols;
int nch; /**< number of channels */
int bufsize;
float **inbufs;
float **outbufs;
LADSPA_Handle *chhandles;
} af_ladspa_t;
/* ------------------------------------------------------------------------- */
static int open(af_instance_t *af);
static int af_ladspa_malloc_failed(char*);
/* ------------------------------------------------------------------------- */
/* Description */
af_info_t af_info_ladspa = {
"LADSPA plugin loader",
"ladspa",
"Ivo van Poorten",
"",
AF_FLAGS_REENTRANT,
open
};
/* ------------------------------------------------------------------------- */
/* By lack of a better word (in my vocabulary) this is called 'parse'.
* Feel free to suggest an alternative.
*/
/** \brief Check for inputs, outputs and controls of a given filter.
*
* This function counts and checks all input, output and control ports
* of the filter that was loaded. If it turns out to be a valid
* filter for MPlayer use, it prints out a list of all controls and
* the corresponding range of its value at message level MSGL_V.
*
* \param setup Current setup of the filter. Must have its
* plugin_descriptor set!
*
* \return Returns AF_OK if it has a valid input/output/controls
* configuration. Else, it returns AF_ERROR.
*/
static int af_ladspa_parse_plugin(af_ladspa_t *setup) {
int p, i;
const LADSPA_Descriptor *pdes = setup->plugin_descriptor;
LADSPA_PortDescriptor d;
LADSPA_PortRangeHint hint;
if (!setup->libhandle)
return AF_ERROR; /* only call parse after a succesful load */
if (!setup->plugin_descriptor)
return AF_ERROR; /* same as above */
/* let's do it */
setup->nports = pdes->PortCount;
/* allocate memory for all inputs/outputs/controls */
setup->inputs = calloc(setup->nports, sizeof(int));
if (!setup->inputs) return af_ladspa_malloc_failed(setup->myname);
setup->outputs = calloc(setup->nports, sizeof(int));
if (!setup->outputs) return af_ladspa_malloc_failed(setup->myname);
setup->inputcontrolsmap = calloc(setup->nports, sizeof(int));
if (!setup->inputcontrolsmap) return af_ladspa_malloc_failed(setup->myname);
setup->inputcontrols = calloc(setup->nports, sizeof(float));
if (!setup->inputcontrols) return af_ladspa_malloc_failed(setup->myname);
setup->outputcontrolsmap = calloc(setup->nports, sizeof(int));
if (!setup->outputcontrolsmap) return af_ladspa_malloc_failed(setup->myname);
setup->outputcontrols = calloc(setup->nports, sizeof(float));
if (!setup->outputcontrols) return af_ladspa_malloc_failed(setup->myname);
/* set counts to zero */
setup->ninputs = 0;
setup->noutputs = 0;
setup->ninputcontrols = 0;
setup->noutputcontrols = 0;
/* check all ports, see what type it is and set variables according to
* what we have found
*/
for (p=0; p<setup->nports; p++) {
d = pdes->PortDescriptors[p];
if (LADSPA_IS_PORT_AUDIO(d)) {
if (LADSPA_IS_PORT_INPUT(d)) {
setup->inputs[setup->ninputs] = p;
setup->ninputs++;
} else if (LADSPA_IS_PORT_OUTPUT(d)) {
setup->outputs[setup->noutputs] = p;
setup->noutputs++;
}
}
if (LADSPA_IS_PORT_CONTROL(d)) {
if (LADSPA_IS_PORT_INPUT(d)) {
setup->inputcontrolsmap[setup->ninputcontrols] = p;
setup->ninputcontrols++;
/* set control to zero. set values after reading the rest
* of the suboptions and check LADSPA_?_HINT's later.
*/
setup->inputcontrols[p] = 0.0f;
} else if (LADSPA_IS_PORT_OUTPUT(d)); {
/* read and handle these too, otherwise filters that have them
* will sig11
*/
setup->outputcontrolsmap[setup->noutputcontrols]=p;
setup->noutputcontrols++;
setup->outputcontrols[p] = 0.0f;
}
}
}
if (setup->ninputs == 0) {
mp_msg(MSGT_AF, MSGL_WARN, "%s: %s\n", setup->myname,
MSGTR_AF_LADSPA_WarnNoInputs);
} else if (setup->ninputs == 1) {
mp_msg(MSGT_AF, MSGL_V, "%s: this is a mono effect\n", setup->myname);
} else if (setup->ninputs == 2) {
mp_msg(MSGT_AF, MSGL_V, "%s: this is a stereo effect\n", setup->myname);
}
if (setup->ninputs > 2) {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s\n", setup->myname,
MSGTR_AF_LADSPA_ErrMultiChannel);
return AF_ERROR;
}
if (setup->noutputs == 0) {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s\n", setup->myname,
MSGTR_AF_LADSPA_ErrNoOutputs);
return AF_ERROR;
}
if (setup->noutputs != setup->ninputs ) {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s\n", setup->myname,
MSGTR_AF_LADSPA_ErrInOutDiff);
return AF_ERROR;
}
mp_msg(MSGT_AF, MSGL_V, "%s: this plugin has %d input control(s)\n",
setup->myname, setup->ninputcontrols);
/* Print list of controls and its range of values it accepts */
for (i=0; i<setup->ninputcontrols; i++) {
p = setup->inputcontrolsmap[i];
hint = pdes->PortRangeHints[p];
mp_msg(MSGT_AF, MSGL_V, " --- %d %s [", i, pdes->PortNames[p]);
if (LADSPA_IS_HINT_BOUNDED_BELOW(hint.HintDescriptor)) {
mp_msg(MSGT_AF, MSGL_V, "%0.2f , ", hint.LowerBound);
} else {
mp_msg(MSGT_AF, MSGL_V, "... , ");
}
if (LADSPA_IS_HINT_BOUNDED_ABOVE(hint.HintDescriptor)) {
mp_msg(MSGT_AF, MSGL_V, "%0.2f]\n", hint.UpperBound);
} else {
mp_msg(MSGT_AF, MSGL_V, "...]\n");
}
}
return AF_OK;
}
/* ------------------------------------------------------------------------- */
/* This function might "slightly" look like dlopenLADSPA in the LADSPA SDK :-)
* But, I changed a few things, because imho it was broken. It did not support
* relative paths, only absolute paths that start with a /
* I think ../../some/dir/foobar.so is just as valid. And if one wants to call
* his library '...somename...so' he's crazy, but it should be allowed.
* So, search the path first, try plain *filename later.
* Also, try adding .so first! I like the recursion the SDK did, but it's
* better the other way around. -af ladspa=cmt:amp_stereo:0.5 is easier to type
* than -af ladspa=cmt.so:amp_stereo:0.5 :-))
*/
/** \brief dlopen() wrapper
*
* This is a wrapper around dlopen(). It tries various variations of the
* filename (with or without the addition of the .so extension) in various
* directories specified by the LADSPA_PATH environment variable. If all fails
* it tries the filename directly as an absolute path to the library.
*
* \param filename filename of the library to load.
* \param flag see dlopen(3) for a description of the flags.
*
* \return returns a pointer to the loaded library on success, or
* NULL if it fails to load.
*/
static void* mydlopen(const char *filename, int flag) {
char *buf;
const char *end, *start, *ladspapath;
int endsinso, needslash;
size_t filenamelen;
void *result = NULL;
# ifdef WIN32 /* for windows there's only absolute path support.
* if you have a windows machine, feel free to fix
* this. (path separator, shared objects extension,
* et cetera).
*/
mp_msg(MSGT_AF, MSGL_V, "\ton windows, only absolute pathnames "
"are supported\n");
mp_msg(MSGT_AF, MSGL_V, "\ttrying %s\n", filename);
return dlopen(filename, flag);
# endif
filenamelen = strlen(filename);
endsinso = 0;
if (filenamelen > 3)
endsinso = (strcmp(filename+filenamelen-3, ".so") == 0);
if (!endsinso) {
buf=malloc(filenamelen+4);
strcpy(buf, filename);
strcat(buf, ".so");
result=mydlopen(buf, flag);
free(buf);
}
if (result)
return result;
ladspapath=getenv("LADSPA_PATH");
if (ladspapath) {
start=ladspapath;
while (*start != '\0') {
end=start;
while ( (*end != ':') && (*end != '\0') )
end++;
buf=malloc(filenamelen + 2 + (end-start) );
if (end > start)
strncpy(buf, start, end-start);
needslash=0;
if (end > start)
if (*(end-1) != '/') {
needslash = 1;
buf[end-start] = '/';
}
strcpy(buf+needslash+(end-start), filename);
mp_msg(MSGT_AF, MSGL_V, "\ttrying %s\n", buf);
result=dlopen(buf, flag);
free(buf);
if (result)
return result;
start = end;
if (*start == ':')
start++;
} /* end while there's still more in the path */
} /* end if there's a ladspapath */
/* last resort, just open it again, so the dlerror() message is correct */
mp_msg(MSGT_AF, MSGL_V, "\ttrying %s\n", filename);
return dlopen(filename,flag);
}
/* ------------------------------------------------------------------------- */
/** \brief Load a LADSPA Plugin
*
* This function loads the LADSPA plugin specified by the file and label
* that are present in the setup variable. First, it loads the library.
* If it fails, it returns AF_ERROR. If not, it continues to look for the
* specified label. If it finds it, it sets the plugin_descriptor inside
* setup and returns AF_OK. If it doesn't, it returns AF_ERROR. Special case
* is a label called 'help'. In that case, it prints a list of all available
* labels (filters) in the library specified by file.
*
* \param setup Current setup of the filter. Contains filename and label.
*
* \return Either AF_ERROR or AF_OK, depending on the success of the operation.
*/
static int af_ladspa_load_plugin(af_ladspa_t *setup) {
const LADSPA_Descriptor *ladspa_descriptor;
LADSPA_Descriptor_Function descriptor_function;
int i;
/* load library */
mp_msg(MSGT_AF, MSGL_V, "%s: loading ladspa plugin library %s\n",
setup->myname, setup->file);
setup->libhandle = mydlopen(setup->file, RTLD_NOW);
if (!setup->libhandle) {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s %s\n\t%s\n", setup->myname,
MSGTR_AF_LADSPA_ErrFailedToLoad, setup->file, dlerror() );
return AF_ERROR;
}
mp_msg(MSGT_AF, MSGL_V, "%s: library found.\n", setup->myname);
/* find descriptor function */
dlerror();
descriptor_function = (LADSPA_Descriptor_Function) dlsym (setup->libhandle,
"ladspa_descriptor");
if (!descriptor_function) {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s\n\t%s\n", setup->myname,
MSGTR_AF_LADSPA_ErrNoDescriptor, dlerror());
return AF_ERROR;
}
/* if label == help, list all labels in library and exit */
if (strcmp(setup->label, "help") == 0) {
mp_msg(MSGT_AF, MSGL_INFO, "%s: %s %s:\n", setup->myname,
MSGTR_AF_LADSPA_AvailableLabels, setup->file);
for (i=0; ; i++) {
ladspa_descriptor = descriptor_function(i);
if (ladspa_descriptor == NULL) {
return AF_ERROR;
}
mp_msg(MSGT_AF, MSGL_INFO, " %-16s - %s (%lu)\n",
ladspa_descriptor->Label,
ladspa_descriptor->Name,
ladspa_descriptor->UniqueID);
}
}
mp_msg(MSGT_AF, MSGL_V, "%s: looking for label\n", setup->myname);
/* find label in library */
for (i=0; ; i++) {
ladspa_descriptor = descriptor_function(i);
if (ladspa_descriptor == NULL) {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s\n", setup->myname,
MSGTR_AF_LADSPA_ErrLabelNotFound);
return AF_ERROR;
}
if (strcmp(ladspa_descriptor->Label, setup->label) == 0) {
setup->plugin_descriptor = ladspa_descriptor;
mp_msg(MSGT_AF, MSGL_V, "%s: %s found\n", setup->myname,
setup->label);
return AF_OK;
}
}
return AF_OK;
}
/* ------------------------------------------------------------------------- */
/** \brief Print a malloc() failed error message.
*
* Generic function which can be called if a call to malloc(), calloc(),
* strdup(), et cetera, failed. It prints a message to the console and
* returns AF_ERROR.
*
* \return AF_ERROR
*/
static int af_ladspa_malloc_failed(char *myname) {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s\n", myname, MSGTR_MemAllocFailed);
return AF_ERROR;
}
/* ------------------------------------------------------------------------- */
/** \brief Controls the filter.
*
* Control the behaviour of the filter.
*
* Commands:
* CONTROL_REINIT Sets the af structure with proper values for number
* of channels, rate, format, et cetera.
* CONTROL_COMMAND_LINE Parses the suboptions given to this filter
* through arg. It first parses the filename and
* the label. After that, it loads the filter
* and finds out its proprties. Then in continues
* parsing the controls given on the commandline,
* if any are needed.
*
* \param af Audio filter instance
* \param cmd The command to execute
* \param arg Arguments to the command
*
* \return Either AF_ERROR or AF_OK, depending on the succes of the
* operation.
*/
static int control(struct af_instance_s *af, int cmd, void *arg) {
af_ladspa_t *setup = (af_ladspa_t*) af->setup;
int i, r;
float val;
switch(cmd) {
case AF_CONTROL_REINIT:
mp_msg(MSGT_AFILTER, MSGL_V, "%s: (re)init\n", setup->myname);
if (!arg) return AF_ERROR;
/* for now, only accept 16 bit signed int */
af->data->rate = ((af_data_t*)arg)->rate;
af->data->nch = ((af_data_t*)arg)->nch;
af->data->format = AF_FORMAT_S16_NE;
af->data->bps = 2;
/* arg->len is not set here yet, so init of buffers and connecting the
* filter, has to be done in play() :-/
*/
return af_test_output(af, (af_data_t*)arg);
case AF_CONTROL_COMMAND_LINE: {
char *buf;
mp_msg(MSGT_AFILTER, MSGL_V, "%s: parse suboptions\n", setup->myname);
/* suboption parser here!
* format is (ladspa=)file:label:controls....
*/
if (!arg) {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s\n", setup->myname,
MSGTR_AF_LADSPA_ErrNoSuboptions);
return AF_ERROR;
}
buf = malloc(strlen(arg)+1);
if (!buf) return af_ladspa_malloc_failed(setup->myname);
/* file... */
buf[0] = '\0';
sscanf(arg, "%[^:]", buf);
if (buf[0] == '\0') {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s\n", setup->myname,
MSGTR_AF_LADSPA_ErrNoLibFile);
free(buf);
return AF_ERROR;
}
arg += strlen(buf);
setup->file = strdup(buf);
if (!setup->file) return af_ladspa_malloc_failed(setup->myname);
mp_msg(MSGT_AF, MSGL_V, "%s: file --> %s\n", setup->myname,
setup->file);
if (*(char*)arg != '\0') arg++; /* read ':' */
/* label... */
buf[0] = '\0';
sscanf(arg, "%[^:]", buf);
if (buf[0] == '\0') {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s\n", setup->myname,
MSGTR_AF_LADSPA_ErrNoLabel);
free(buf);
return AF_ERROR;
}
arg += strlen(buf);
setup->label = strdup(buf);
if (!setup->label) return af_ladspa_malloc_failed(setup->myname);
mp_msg(MSGT_AF, MSGL_V, "%s: label --> %s\n", setup->myname,
setup->label);
/* if (*(char*)arg != '0') arg++; */ /* read ':' */
free(buf); /* no longer needed */
/* set new setup->myname */
if(setup->myname) free(setup->myname);
setup->myname = calloc(strlen(af_info_ladspa.name)+strlen(setup->file)+
strlen(setup->label)+6, 1);
snprintf(setup->myname, strlen(af_info_ladspa.name)+
strlen(setup->file)+strlen(setup->label)+6, "%s: (%s:%s)",
af_info_ladspa.name, setup->file, setup->label);
/* load plugin :) */
if ( af_ladspa_load_plugin(setup) != AF_OK )
return AF_ERROR;
/* see what inputs, outputs and controls this plugin has */
if ( af_ladspa_parse_plugin(setup) != AF_OK )
return AF_ERROR;
/* ninputcontrols is set by now, read control values from arg */
for(i=0; i<setup->ninputcontrols; i++) {
if (!arg || (*(char*)arg != ':') ) {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s\n", setup->myname,
MSGTR_AF_LADSPA_ErrNotEnoughControls);
return AF_ERROR;
}
arg++;
r = sscanf(arg, "%f", &val);
if (r!=1) {
mp_msg(MSGT_AF, MSGL_ERR, "%s: %s\n", setup->myname,
MSGTR_AF_LADSPA_ErrNotEnoughControls);
return AF_ERROR;
}
setup->inputcontrols[setup->inputcontrolsmap[i]] = val;
arg = strchr(arg, ':');
}
mp_msg(MSGT_AF, MSGL_V, "%s: input controls: ", setup->myname);
for(i=0; i<setup->ninputcontrols; i++) {
mp_msg(MSGT_AF, MSGL_V, "%0.4f ",
setup->inputcontrols[setup->inputcontrolsmap[i]]);
}
mp_msg(MSGT_AF, MSGL_V, "\n");
/* check boundaries of inputcontrols */
mp_msg(MSGT_AF, MSGL_V, "%s: checking boundaries of input controls\n",
setup->myname);
for(i=0; i<setup->ninputcontrols; i++) {
int p = setup->inputcontrolsmap[i];
LADSPA_PortRangeHint hint =
setup->plugin_descriptor->PortRangeHints[p];
val = setup->inputcontrols[p];
if (LADSPA_IS_HINT_BOUNDED_BELOW(hint.HintDescriptor) &&
val < hint.LowerBound) {
mp_msg(MSGT_AF, MSGL_ERR, MSGTR_AF_LADSPA_ErrControlBelow,
setup->myname, i, hint.LowerBound);
return AF_ERROR;
}
if (LADSPA_IS_HINT_BOUNDED_ABOVE(hint.HintDescriptor) &&
val > hint.UpperBound) {
mp_msg(MSGT_AF, MSGL_ERR, MSGTR_AF_LADSPA_ErrControlAbove,
setup->myname, i, hint.UpperBound);
return AF_ERROR;
}
}
mp_msg(MSGT_AF, MSGL_V, "%s: all controls have sane values\n",
setup->myname);
/* All is well! */
setup->status = AF_OK;
return AF_OK; }
}
return AF_UNKNOWN;
}
/* ------------------------------------------------------------------------- */
/** \brief Uninitialise the LADSPA Plugin Loader filter.
*
* This function deactivates the plugin(s), cleans up, frees all allocated
* memory and exits.
*
* \return No return value.
*/
static void uninit(struct af_instance_s *af) {
int i;
if (af->data)
free(af->data);
if (af->setup) {
af_ladspa_t *setup = (af_ladspa_t*) af->setup;
const LADSPA_Descriptor *pdes = setup->plugin_descriptor;
if (setup->myname) {
mp_msg(MSGT_AF, MSGL_V, "%s: cleaning up\n", setup->myname);
free(setup->myname);
}
if (setup->chhandles) {
for(i=0; i<setup->nch; i++) {
if ( (setup->ninputs == 2) && (i & 1) ) { /* stereo effect */
i++;
continue;
}
if (pdes->deactivate) pdes->deactivate(setup->chhandles[i]);
if (pdes->cleanup) pdes->cleanup(setup->chhandles[i]);
}
free(setup->chhandles);
}
if (setup->file)
free(setup->file);
if (setup->label)
free(setup->label);
if (setup->inputcontrolsmap)
free(setup->inputcontrolsmap);
if (setup->inputcontrols)
free(setup->inputcontrols);
if (setup->outputcontrolsmap)
free(setup->outputcontrolsmap);
if (setup->outputcontrols)
free(setup->outputcontrols);
if (setup->inputs)
free(setup->inputs);
if (setup->outputs)
free(setup->outputs);
if (setup->inbufs) {
for(i=0; i<setup->nch; i++) {
if (setup->inbufs[i])
free(setup->inbufs[i]);
}
free(setup->inbufs);
}
if (setup->outbufs) {
for(i=0; i<setup->nch; i++) {
if (setup->outbufs[i])
free(setup->outbufs[i]);
}
free(setup->outbufs);
}
if (setup->libhandle)
dlclose(setup->libhandle);
free(setup);
setup = NULL;
}
}
/* ------------------------------------------------------------------------- */
/** \brief Process chunk of audio data through the selected LADSPA Plugin.
*
* \param af Pointer to audio filter instance
* \param data Pointer to chunk of audio data
*
* \return Either AF_ERROR or AF_OK
*/
static af_data_t* play(struct af_instance_s *af, af_data_t *data) {
af_ladspa_t *setup = af->setup;
const LADSPA_Descriptor *pdes = setup->plugin_descriptor;
int16_t *audio = (int16_t*)data->audio;
int nsamples = data->len/2; /* /2 because it's int16_t */
int nch = data->nch;
int rate = data->rate;
int i, p;
float v;
if (setup->status !=AF_OK)
return data;
/* See if it's the first call. If so, setup inbufs/outbufs, instantiate
* plugin, connect ports and activate plugin
*/
/* 2004-12-07: Also check if the buffersize has to be changed!
* data->len is not constant per se! re-init buffers.
*/
if ( (setup->bufsize != nsamples/nch) || (setup->nch != nch) ) {
/* if setup->nch==0, it's the first call, if not, something has
* changed and all previous mallocs have to be freed
*/
if (setup->nch != 0) {
mp_msg(MSGT_AF, MSGL_DBG2, "%s: bufsize change; free old buffer\n",
setup->myname);
if(setup->inbufs) {
for(i=0; i<setup->nch; i++) {
if(setup->inbufs[i])
free(setup->inbufs[i]);
}
free(setup->inbufs);
}
if(setup->outbufs) {
for(i=0; i<setup->nch; i++) {
if(setup->outbufs[i])
free(setup->outbufs[i]);
}
free(setup->outbufs);
}
} /* everything is freed */
setup->bufsize = nsamples/nch;
setup->nch = nch;
setup->inbufs = calloc(nch, sizeof(float*));
setup->outbufs = calloc(nch, sizeof(float*));
mp_msg(MSGT_AF, MSGL_DBG2, "%s: bufsize = %d\n",
setup->myname, setup->bufsize);
for(i=0; i<nch; i++) {
setup->inbufs[i] = calloc(setup->bufsize, sizeof(float));
setup->outbufs[i] = calloc(setup->bufsize, sizeof(float));
}
/* only on the first call, there are no handles. */
if (!setup->chhandles) {
setup->chhandles = calloc(nch, sizeof(LADSPA_Handle));
/* create handles
* for stereo effects, create one handle for two channels
*/
for(i=0; i<nch; i++) {
if ( (setup->ninputs == 2) && (i & 1) ) { /* stereo effect */
/* copy the handle from previous channel */
setup->chhandles[i] = setup->chhandles[i-1];
continue;
}
setup->chhandles[i] = pdes->instantiate(pdes, rate);
}
}
/* connect input/output ports for each channel/filter instance
*
* always (re)connect ports
*/
for(i=0; i<nch; i++) {
pdes->connect_port(setup->chhandles[i],
setup->inputs[ (setup->ninputs==2) ? i&1 : 0 ],
setup->inbufs[i]);
pdes->connect_port(setup->chhandles[i],
setup->outputs[ (setup->ninputs==2) ? i&1 : 0 ],
setup->outbufs[i]);
/* connect (input) controls */
for (p=0; p<setup->nports; p++) {
LADSPA_PortDescriptor d = pdes->PortDescriptors[p];
if (LADSPA_IS_PORT_CONTROL(d)) {
if (LADSPA_IS_PORT_INPUT(d)) {
pdes->connect_port(setup->chhandles[i], p,
&(setup->inputcontrols[p]) );
} else {
pdes->connect_port(setup->chhandles[i], p,
&(setup->outputcontrols[p]) );
}
}
}
/* Activate filter (if it isn't already :) ) */
if ( (pdes->activate) && (setup->activated == 0) ) {
pdes->activate(setup->chhandles[i]);
setup->activated = 1;
}
} /* All channels/filters done! except for... */
/* Stereo effect with one channel left. Use same buffer for left
* and right. connect it to the second port.
*/
if( (setup->ninputs == 2) && (i&1) && (i >= 1) ) {
pdes->connect_port(setup->chhandles[i-1],
setup->inputs[ (setup->ninputs==2) ? i&1 : 0 ],
setup->inbufs[i-1]);
pdes->connect_port(setup->chhandles[i-1],
setup->outputs[ (setup->ninputs==2) ? i&1 : 0 ],
setup->outbufs[i-1]);
} /* done! */
} /* setup for first call/change of bufsize is done.
* normal playing routine follows...
*/
/* Right now, I use a separate input and output buffer.
* I could change this to in-place processing (inbuf==outbuf), but some
* ladspa filters are broken and are not able to handle that. This seems
* fast enough, so unless somebody complains, it stays this way :)
*/
/* Fill inbufs */
for (p=0; p<setup->bufsize; p++) {
for (i=0; i<nch; i++) {
setup->inbufs[i][p] = ( (float) audio[p*nch + i] ) / 32768.0f;
}
}
/* Run filter(s) */
for (i=0; i<nch; i++) {
pdes->run(setup->chhandles[i], setup->bufsize);
if (setup->ninputs==2) // stereo effect just ran
i++;
}
/* Extract outbufs, hard clipping in case the filter exceeded [-1.0,1.0] */
for (p=0; p<setup->bufsize; p++) {
for (i=0; i<nch; i++) {
v = setup->outbufs[i][p];
v *= 32768.0f;
v = (v > 32767.0f ? 32767.0f : v);
v = (v < -32768.0f ? -32768.0f : v);
audio[p*nch + i] = (int16_t) v;
}
}
/* done */
return data;
}
/* ------------------------------------------------------------------------- */
/** \brief Open LADSPA Plugin Loader Filter
*
* \param af Audio Filter instance
*
* \return Either AF_ERROR or AF_OK
*/
static int open(af_instance_t *af) {
af->control=control;
af->uninit=uninit;
af->play=play;
af->mul.n=1;
af->mul.d=1;
af->data = calloc(1, sizeof(af_data_t));
if (af->data == NULL)
return af_ladspa_malloc_failed((char*)af_info_ladspa.name);
af->setup = calloc(1, sizeof(af_ladspa_t));
if (af->setup == NULL) {
free(af->data);
af->data=NULL;
return af_ladspa_malloc_failed((char*)af_info_ladspa.name);
}
((af_ladspa_t*)af->setup)->status = AF_ERROR; /* will be set to AF_OK if
* all went OK and play()
* should proceed.
*/
((af_ladspa_t*)af->setup)->myname = strdup(af_info_ladspa.name);
if (!((af_ladspa_t*)af->setup)->myname)
return af_ladspa_malloc_failed((char*)af_info_ladspa.name);
return AF_OK;
}
/* ------------------------------------------------------------------------- */
#undef MSGT_AF
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