diff options
Diffstat (limited to 'audio/filter/af_ladspa.c')
| -rw-r--r-- | audio/filter/af_ladspa.c | 915 |
1 files changed, 915 insertions, 0 deletions
diff --git a/audio/filter/af_ladspa.c b/audio/filter/af_ladspa.c new file mode 100644 index 0000000000..c1b3f24360 --- /dev/null +++ b/audio/filter/af_ladspa.c @@ -0,0 +1,915 @@ +/* + * LADSPA plugin loader + * + * Written by Ivo van Poorten <ivop@euronet.nl> + * Copyright (C) 2004, 2005 + * + * This file is part of MPlayer. + * + * MPlayer 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. + * + * MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/* ------------------------------------------------------------------------- */ + +/* Global Includes */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <inttypes.h> +#include <math.h> +#include <limits.h> + +#include <dlfcn.h> +#include <ladspa.h> + +/* ------------------------------------------------------------------------- */ + +/* Local Includes */ + +#include "af.h" + +/* ------------------------------------------------------------------------- */ + +/* 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 af_open(struct af_instance *af); +static int af_ladspa_malloc_failed(char*); + +/* ------------------------------------------------------------------------- */ + +/* Description */ + +struct af_info af_info_ladspa = { + "LADSPA plugin loader", + "ladspa", + "Ivo van Poorten", + "", + AF_FLAGS_REENTRANT, + af_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_AFILTER, MSGL_WARN, "%s: %s\n", setup->myname, + _("WARNING! This LADSPA plugin has no audio inputs.\n The incoming audio signal will be lost.")); + } else if (setup->ninputs == 1) { + mp_msg(MSGT_AFILTER, MSGL_V, "%s: this is a mono effect\n", setup->myname); + } else if (setup->ninputs == 2) { + mp_msg(MSGT_AFILTER, MSGL_V, "%s: this is a stereo effect\n", setup->myname); + } else { + mp_msg(MSGT_AFILTER, MSGL_V, "%s: this is a %i-channel effect, " + "support is experimental\n", setup->myname, setup->ninputs); + } + + if (setup->noutputs == 0) { + mp_msg(MSGT_AFILTER, MSGL_ERR, "%s: %s\n", setup->myname, + _("This LADSPA plugin has no audio outputs.")); + return AF_ERROR; + } + + if (setup->noutputs != setup->ninputs ) { + mp_msg(MSGT_AFILTER, MSGL_ERR, "%s: %s\n", setup->myname, + _("The number of audio inputs and audio outputs of the LADSPA plugin differ.")); + return AF_ERROR; + } + + mp_msg(MSGT_AFILTER, 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_AFILTER, MSGL_V, " --- %d %s [", i, pdes->PortNames[p]); + + if (LADSPA_IS_HINT_BOUNDED_BELOW(hint.HintDescriptor)) { + mp_msg(MSGT_AFILTER, MSGL_V, "%0.2f , ", hint.LowerBound); + } else { + mp_msg(MSGT_AFILTER, MSGL_V, "... , "); + } + + if (LADSPA_IS_HINT_BOUNDED_ABOVE(hint.HintDescriptor)) { + mp_msg(MSGT_AFILTER, MSGL_V, "%0.2f]\n", hint.UpperBound); + } else { + mp_msg(MSGT_AFILTER, 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; + +#if defined(__MINGW32__) || defined(__CYGWIN__) + /* 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_AFILTER, MSGL_V, "\ton windows, only absolute pathnames " + "are supported\n"); + mp_msg(MSGT_AFILTER, 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_AFILTER, 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_AFILTER, 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_AFILTER, 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_AFILTER, MSGL_ERR, "%s: %s %s\n\t%s\n", setup->myname, + _("failed to load"), setup->file, dlerror() ); + return AF_ERROR; + } + + mp_msg(MSGT_AFILTER, 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_AFILTER, MSGL_ERR, "%s: %s\n\t%s\n", setup->myname, + _("Couldn't find ladspa_descriptor() function in the specified library file."), dlerror()); + return AF_ERROR; + } + + /* if label == help, list all labels in library and exit */ + + if (strcmp(setup->label, "help") == 0) { + mp_msg(MSGT_AFILTER, MSGL_INFO, "%s: %s %s:\n", setup->myname, + _("available labels in"), setup->file); + for (i=0; ; i++) { + ladspa_descriptor = descriptor_function(i); + if (ladspa_descriptor == NULL) { + return AF_ERROR; + } + mp_msg(MSGT_AFILTER, MSGL_INFO, " %-16s - %s (%lu)\n", + ladspa_descriptor->Label, + ladspa_descriptor->Name, + ladspa_descriptor->UniqueID); + } + } + + mp_msg(MSGT_AFILTER, 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_AFILTER, MSGL_ERR, "%s: %s\n", setup->myname, + _("Couldn't find label in plugin library.")); + return AF_ERROR; + } + if (strcmp(ladspa_descriptor->Label, setup->label) == 0) { + setup->plugin_descriptor = ladspa_descriptor; + mp_msg(MSGT_AFILTER, 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_AFILTER, MSGL_ERR, "%s: %s", myname, "Memory allocation failed.\n"); + 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 *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; + + /* accept FLOAT, let af_format do conversion */ + + af->data->rate = ((struct mp_audio*)arg)->rate; + af->data->nch = ((struct mp_audio*)arg)->nch; + af->data->format = AF_FORMAT_FLOAT_NE; + af->data->bps = 4; + + /* 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, (struct mp_audio*)arg); + case AF_CONTROL_COMMAND_LINE: { + char *buf; + char *line = arg; + + mp_msg(MSGT_AFILTER, MSGL_V, "%s: parse suboptions\n", setup->myname); + + /* suboption parser here! + * format is (ladspa=)file:label:controls.... + */ + + if (!line) { + mp_msg(MSGT_AFILTER, MSGL_ERR, "%s: %s\n", setup->myname, + _("No suboptions specified.")); + return AF_ERROR; + } + + buf = malloc(strlen(line)+1); + if (!buf) return af_ladspa_malloc_failed(setup->myname); + + /* file... */ + buf[0] = '\0'; + sscanf(line, "%[^:]", buf); + if (buf[0] == '\0') { + mp_msg(MSGT_AFILTER, MSGL_ERR, "%s: %s\n", setup->myname, + _("No library file specified.")); + free(buf); + return AF_ERROR; + } + line += strlen(buf); + setup->file = strdup(buf); + if (!setup->file) return af_ladspa_malloc_failed(setup->myname); + mp_msg(MSGT_AFILTER, MSGL_V, "%s: file --> %s\n", setup->myname, + setup->file); + if (*line != '\0') line++; /* read ':' */ + + /* label... */ + buf[0] = '\0'; + sscanf(line, "%[^:]", buf); + if (buf[0] == '\0') { + mp_msg(MSGT_AFILTER, MSGL_ERR, "%s: %s\n", setup->myname, + _("No filter label specified.")); + free(buf); + return AF_ERROR; + } + line += strlen(buf); + setup->label = strdup(buf); + if (!setup->label) return af_ladspa_malloc_failed(setup->myname); + mp_msg(MSGT_AFILTER, MSGL_V, "%s: label --> %s\n", setup->myname, + setup->label); +/* if (*line != '0') line++; */ /* read ':' */ + + free(buf); /* no longer needed */ + + /* set new 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 (!line || *line != ':') { + mp_msg(MSGT_AFILTER, MSGL_ERR, "%s: %s\n", setup->myname, + _("Not enough controls specified on the command line.")); + return AF_ERROR; + } + line++; + r = sscanf(line, "%f", &val); + if (r!=1) { + mp_msg(MSGT_AFILTER, MSGL_ERR, "%s: %s\n", setup->myname, + _("Not enough controls specified on the command line.")); + return AF_ERROR; + } + setup->inputcontrols[setup->inputcontrolsmap[i]] = val; + line = strchr(line, ':'); + } + + mp_msg(MSGT_AFILTER, MSGL_V, "%s: input controls: ", setup->myname); + for(i=0; i<setup->ninputcontrols; i++) { + mp_msg(MSGT_AFILTER, MSGL_V, "%0.4f ", + setup->inputcontrols[setup->inputcontrolsmap[i]]); + } + mp_msg(MSGT_AFILTER, MSGL_V, "\n"); + + /* check boundaries of inputcontrols */ + + mp_msg(MSGT_AFILTER, 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_tmsg(MSGT_AFILTER, MSGL_ERR, "%s: Input control #%d is below lower boundary of %0.4f.\n", + setup->myname, i, hint.LowerBound); + return AF_ERROR; + } + if (LADSPA_IS_HINT_BOUNDED_ABOVE(hint.HintDescriptor) && + val > hint.UpperBound) { + mp_tmsg(MSGT_AFILTER, MSGL_ERR, "%s: Input control #%d is above upper boundary of %0.4f.\n", + setup->myname, i, hint.UpperBound); + return AF_ERROR; + } + } + mp_msg(MSGT_AFILTER, 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 *af) { + int i; + + 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_AFILTER, MSGL_V, "%s: cleaning up\n", setup->myname); + free(setup->myname); + } + + if (setup->chhandles) { + for(i=0; i<setup->nch; i+=setup->ninputs) { + if (pdes->deactivate) pdes->deactivate(setup->chhandles[i]); + if (pdes->cleanup) pdes->cleanup(setup->chhandles[i]); + } + free(setup->chhandles); + } + + free(setup->file); + free(setup->label); + free(setup->inputcontrolsmap); + free(setup->inputcontrols); + free(setup->outputcontrolsmap); + free(setup->outputcontrols); + free(setup->inputs); + free(setup->outputs); + + if (setup->inbufs) { + for(i=0; i<setup->nch; i++) + free(setup->inbufs[i]); + free(setup->inbufs); + } + + if (setup->outbufs) { + for(i=0; i<setup->nch; 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 struct mp_audio* play(struct af_instance *af, struct mp_audio *data) { + af_ladspa_t *setup = af->setup; + const LADSPA_Descriptor *pdes = setup->plugin_descriptor; + float *audio = (float*)data->audio; + int nsamples = data->len/4; /* /4 because it's 32-bit float */ + int nch = data->nch; + int rate = data->rate; + int i, p; + + 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_AFILTER, MSGL_DBG3, "%s: bufsize change; free old buffer\n", + setup->myname); + + if(setup->inbufs) { + for(i=0; i<setup->nch; i++) + free(setup->inbufs[i]); + free(setup->inbufs); + } + if(setup->outbufs) { + for(i=0; i<setup->nch; 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_AFILTER, MSGL_DBG3, "%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 (i % setup->ninputs) { /* 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[i % setup->ninputs], + setup->inbufs[i]); + pdes->connect_port(setup->chhandles[i], + setup->outputs[i % setup->ninputs], + 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 && i % setup->ninputs == 0) + pdes->activate(setup->chhandles[i]); + + } /* All channels/filters done! except for... */ + setup->activated = 1; + + /* Stereo effect with one channel left. Use same buffer for left + * and right. connect it to the second port. + */ + + for (p = i; p % setup->ninputs; p++) { + pdes->connect_port(setup->chhandles[i-1], + setup->inputs[p % setup->ninputs], + setup->inbufs[i-1]); + pdes->connect_port(setup->chhandles[i-1], + setup->outputs[p % setup->ninputs], + 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] = audio[p*nch + i]; + } + } + + /* Run filter(s) */ + + for (i=0; i<nch; i+=setup->ninputs) { + pdes->run(setup->chhandles[i], setup->bufsize); + } + + /* Extract outbufs */ + + for (p=0; p<setup->bufsize; p++) { + for (i=0; i<nch; i++) { + audio[p*nch + i] = setup->outbufs[i][p]; + } + } + + /* done */ + + return data; +} + +/* ------------------------------------------------------------------------- */ + +/** \brief Open LADSPA Plugin Loader Filter + * + * \param af Audio Filter instance + * + * \return Either AF_ERROR or AF_OK + */ + +static int af_open(struct af_instance *af) { + + af->control=control; + af->uninit=uninit; + af->play=play; + af->mul=1; + + af->data = calloc(1, sizeof(struct mp_audio)); + 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; +} + +/* ------------------------------------------------------------------------- */ |