mirror of
https://github.com/libretro/libretro-common.git
synced 2024-06-22 22:22:39 -04:00
325 lines
8.9 KiB
C
325 lines
8.9 KiB
C
/* Copyright (C) 2010-2020 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (dsp_filter.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include <retro_miscellaneous.h>
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#include <compat/posix_string.h>
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#include <dynamic/dylib.h>
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#include <file/file_path.h>
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#include <file/config_file_userdata.h>
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#include <features/features_cpu.h>
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#include <lists/string_list.h>
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#include <string/stdstring.h>
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#include <libretro_dspfilter.h>
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#include <audio/dsp_filter.h>
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struct retro_dsp_plug
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{
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#ifdef HAVE_DYLIB
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dylib_t lib;
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#endif
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const struct dspfilter_implementation *impl;
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};
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struct retro_dsp_instance
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{
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const struct dspfilter_implementation *impl;
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void *impl_data;
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};
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struct retro_dsp_filter
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{
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config_file_t *conf;
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struct retro_dsp_plug *plugs;
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unsigned num_plugs;
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struct retro_dsp_instance *instances;
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unsigned num_instances;
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};
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static const struct dspfilter_implementation *find_implementation(
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retro_dsp_filter_t *dsp, const char *ident)
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{
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unsigned i;
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for (i = 0; i < dsp->num_plugs; i++)
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{
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if (string_is_equal(dsp->plugs[i].impl->short_ident, ident))
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return dsp->plugs[i].impl;
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}
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return NULL;
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}
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static const struct dspfilter_config dspfilter_config = {
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config_userdata_get_float,
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config_userdata_get_int,
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config_userdata_get_float_array,
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config_userdata_get_int_array,
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config_userdata_get_string,
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config_userdata_free,
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};
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static bool create_filter_graph(retro_dsp_filter_t *dsp, float sample_rate)
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{
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unsigned i;
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struct retro_dsp_instance *instances = NULL;
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unsigned filters = 0;
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if (!config_get_uint(dsp->conf, "filters", &filters))
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return false;
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instances = (struct retro_dsp_instance*)calloc(filters, sizeof(*instances));
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if (!instances)
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return false;
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dsp->instances = instances;
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dsp->num_instances = filters;
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for (i = 0; i < filters; i++)
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{
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struct config_file_userdata userdata;
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struct dspfilter_info info;
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char key[64];
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char name[64];
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key[0] = name[0] = '\0';
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info.input_rate = sample_rate;
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snprintf(key, sizeof(key), "filter%u", i);
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if (!config_get_array(dsp->conf, key, name, sizeof(name)))
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return false;
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dsp->instances[i].impl = find_implementation(dsp, name);
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if (!dsp->instances[i].impl)
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return false;
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userdata.conf = dsp->conf;
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/* Index-specific configs take priority over ident-specific. */
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userdata.prefix[0] = key;
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userdata.prefix[1] = dsp->instances[i].impl->short_ident;
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dsp->instances[i].impl_data = dsp->instances[i].impl->init(&info,
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&dspfilter_config, &userdata);
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if (!dsp->instances[i].impl_data)
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return false;
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}
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return true;
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}
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#if defined(HAVE_FILTERS_BUILTIN)
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extern const struct dspfilter_implementation *panning_dspfilter_get_implementation(dspfilter_simd_mask_t mask);
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extern const struct dspfilter_implementation *iir_dspfilter_get_implementation(dspfilter_simd_mask_t mask);
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extern const struct dspfilter_implementation *echo_dspfilter_get_implementation(dspfilter_simd_mask_t mask);
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extern const struct dspfilter_implementation *phaser_dspfilter_get_implementation(dspfilter_simd_mask_t mask);
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extern const struct dspfilter_implementation *wahwah_dspfilter_get_implementation(dspfilter_simd_mask_t mask);
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extern const struct dspfilter_implementation *eq_dspfilter_get_implementation(dspfilter_simd_mask_t mask);
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extern const struct dspfilter_implementation *chorus_dspfilter_get_implementation(dspfilter_simd_mask_t mask);
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static const dspfilter_get_implementation_t dsp_plugs_builtin[] = {
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panning_dspfilter_get_implementation,
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iir_dspfilter_get_implementation,
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echo_dspfilter_get_implementation,
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phaser_dspfilter_get_implementation,
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wahwah_dspfilter_get_implementation,
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eq_dspfilter_get_implementation,
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chorus_dspfilter_get_implementation,
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};
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static bool append_plugs(retro_dsp_filter_t *dsp, struct string_list *list)
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{
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unsigned i;
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dspfilter_simd_mask_t mask = (dspfilter_simd_mask_t)cpu_features_get();
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struct retro_dsp_plug *plugs = (struct retro_dsp_plug*)
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calloc(ARRAY_SIZE(dsp_plugs_builtin), sizeof(*plugs));
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if (!plugs)
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return false;
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dsp->plugs = plugs;
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dsp->num_plugs = ARRAY_SIZE(dsp_plugs_builtin);
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for (i = 0; i < ARRAY_SIZE(dsp_plugs_builtin); i++)
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{
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dsp->plugs[i].impl = dsp_plugs_builtin[i](mask);
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if (!dsp->plugs[i].impl)
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return false;
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}
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return true;
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}
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#elif defined(HAVE_DYLIB)
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static bool append_plugs(retro_dsp_filter_t *dsp, struct string_list *list)
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{
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unsigned i;
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dspfilter_simd_mask_t mask = (dspfilter_simd_mask_t)cpu_features_get();
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unsigned list_size = list ? (unsigned)list->size : 0;
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for (i = 0; i < list_size; i++)
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{
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dspfilter_get_implementation_t cb;
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const struct dspfilter_implementation *impl = NULL;
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struct retro_dsp_plug *new_plugs = NULL;
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dylib_t lib =
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dylib_load(list->elems[i].data);
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if (!lib)
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continue;
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cb = (dspfilter_get_implementation_t)dylib_proc(lib, "dspfilter_get_implementation");
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if (!cb)
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{
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dylib_close(lib);
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continue;
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}
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impl = cb(mask);
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if (!impl)
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{
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dylib_close(lib);
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continue;
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}
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if (impl->api_version != DSPFILTER_API_VERSION)
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{
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dylib_close(lib);
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continue;
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}
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new_plugs = (struct retro_dsp_plug*)
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realloc(dsp->plugs, sizeof(*dsp->plugs) * (dsp->num_plugs + 1));
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if (!new_plugs)
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{
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dylib_close(lib);
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return false;
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}
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/* Found plug. */
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dsp->plugs = new_plugs;
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dsp->plugs[dsp->num_plugs].lib = lib;
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dsp->plugs[dsp->num_plugs].impl = impl;
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dsp->num_plugs++;
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}
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return true;
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}
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#endif
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retro_dsp_filter_t *retro_dsp_filter_new(
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const char *filter_config,
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void *string_data,
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float sample_rate)
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{
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config_file_t *conf = NULL;
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struct string_list *plugs = NULL;
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retro_dsp_filter_t *dsp = (retro_dsp_filter_t*)calloc(1, sizeof(*dsp));
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if (!dsp)
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return NULL;
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if (!(conf = config_file_new_from_path_to_string(filter_config)))
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goto error;
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dsp->conf = conf;
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if (string_data)
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plugs = (struct string_list*)string_data;
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#if defined(HAVE_DYLIB) || defined(HAVE_FILTERS_BUILTIN)
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if (!append_plugs(dsp, plugs))
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goto error;
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#endif
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if (plugs)
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string_list_free(plugs);
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plugs = NULL;
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if (!create_filter_graph(dsp, sample_rate))
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goto error;
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return dsp;
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error:
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if (plugs)
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string_list_free(plugs);
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retro_dsp_filter_free(dsp);
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return NULL;
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}
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void retro_dsp_filter_free(retro_dsp_filter_t *dsp)
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{
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unsigned i;
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if (!dsp)
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return;
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for (i = 0; i < dsp->num_instances; i++)
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{
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if (dsp->instances[i].impl_data && dsp->instances[i].impl)
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dsp->instances[i].impl->free(dsp->instances[i].impl_data);
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}
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free(dsp->instances);
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#ifdef HAVE_DYLIB
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for (i = 0; i < dsp->num_plugs; i++)
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{
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if (dsp->plugs[i].lib)
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dylib_close(dsp->plugs[i].lib);
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}
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free(dsp->plugs);
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#endif
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if (dsp->conf)
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config_file_free(dsp->conf);
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free(dsp);
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}
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void retro_dsp_filter_process(retro_dsp_filter_t *dsp,
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struct retro_dsp_data *data)
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{
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unsigned i;
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struct dspfilter_output output = {0};
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struct dspfilter_input input = {0};
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output.samples = data->input;
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output.frames = data->input_frames;
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for (i = 0; i < dsp->num_instances; i++)
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{
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input.samples = output.samples;
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input.frames = output.frames;
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dsp->instances[i].impl->process(
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dsp->instances[i].impl_data, &output, &input);
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}
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data->output = output.samples;
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data->output_frames = output.frames;
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}
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