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Diffstat (limited to 'libavfilter/af_ladspa.c')
| -rw-r--r-- | libavfilter/af_ladspa.c | 705 |
1 files changed, 705 insertions, 0 deletions
diff --git a/libavfilter/af_ladspa.c b/libavfilter/af_ladspa.c new file mode 100644 index 0000000..2057e6d --- /dev/null +++ b/libavfilter/af_ladspa.c @@ -0,0 +1,705 @@ +/* + * Copyright (c) 2013 Paul B Mahol + * Copyright (c) 2011 Mina Nagy Zaki + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * LADSPA wrapper + */ + +#include <dlfcn.h> +#include <ladspa.h> +#include "libavutil/avstring.h" +#include "libavutil/channel_layout.h" +#include "libavutil/opt.h" +#include "audio.h" +#include "avfilter.h" +#include "internal.h" + +typedef struct LADSPAContext { + const AVClass *class; + char *dl_name; + char *plugin; + char *options; + void *dl_handle; + + unsigned long nb_inputs; + unsigned long *ipmap; /* map input number to port number */ + + unsigned long nb_inputcontrols; + unsigned long *icmap; /* map input control number to port number */ + LADSPA_Data *ictlv; /* input controls values */ + + unsigned long nb_outputs; + unsigned long *opmap; /* map output number to port number */ + + unsigned long nb_outputcontrols; + unsigned long *ocmap; /* map output control number to port number */ + LADSPA_Data *octlv; /* output controls values */ + + const LADSPA_Descriptor *desc; + int *ctl_needs_value; + int nb_handles; + LADSPA_Handle *handles; + + int sample_rate; + int nb_samples; + int64_t pts; + int64_t duration; +} LADSPAContext; + +#define OFFSET(x) offsetof(LADSPAContext, x) +#define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM +static const AVOption ladspa_options[] = { + { "file", "set library name or full path", OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "f", "set library name or full path", OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "plugin", "set plugin name", OFFSET(plugin), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "p", "set plugin name", OFFSET(plugin), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "controls", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "c", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS }, + { "s", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS }, + { "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS }, + { "n", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS }, + { "duration", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS }, + { "d", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(ladspa); + +static void print_ctl_info(AVFilterContext *ctx, int level, + LADSPAContext *s, int ctl, unsigned long *map, + LADSPA_Data *values, int print) +{ + const LADSPA_PortRangeHint *h = s->desc->PortRangeHints + map[ctl]; + + av_log(ctx, level, "c%i: %s [", ctl, s->desc->PortNames[map[ctl]]); + + if (LADSPA_IS_HINT_TOGGLED(h->HintDescriptor)) { + av_log(ctx, level, "toggled (1 or 0)"); + + if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor)) + av_log(ctx, level, " (default %i)", (int)values[ctl]); + } else { + if (LADSPA_IS_HINT_INTEGER(h->HintDescriptor)) { + av_log(ctx, level, "<int>"); + + if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor)) + av_log(ctx, level, ", min: %i", (int)h->LowerBound); + + if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor)) + av_log(ctx, level, ", max: %i", (int)h->UpperBound); + + if (print) + av_log(ctx, level, " (value %d)", (int)values[ctl]); + else if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor)) + av_log(ctx, level, " (default %d)", (int)values[ctl]); + } else { + av_log(ctx, level, "<float>"); + + if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor)) + av_log(ctx, level, ", min: %f", h->LowerBound); + + if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor)) + av_log(ctx, level, ", max: %f", h->UpperBound); + + if (print) + av_log(ctx, level, " (value %f)", values[ctl]); + else if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor)) + av_log(ctx, level, " (default %f)", values[ctl]); + } + + if (LADSPA_IS_HINT_SAMPLE_RATE(h->HintDescriptor)) + av_log(ctx, level, ", multiple of sample rate"); + + if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor)) + av_log(ctx, level, ", logarithmic scale"); + } + + av_log(ctx, level, "]\n"); +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + AVFilterContext *ctx = inlink->dst; + LADSPAContext *s = ctx->priv; + AVFrame *out; + int i, h; + + if (!s->nb_outputs || + (av_frame_is_writable(in) && s->nb_inputs == s->nb_outputs && + !(s->desc->Properties & LADSPA_PROPERTY_INPLACE_BROKEN))) { + out = in; + } else { + out = ff_get_audio_buffer(ctx->outputs[0], in->nb_samples); + if (!out) { + av_frame_free(&in); + return AVERROR(ENOMEM); + } + av_frame_copy_props(out, in); + } + + for (h = 0; h < s->nb_handles; h++) { + for (i = 0; i < s->nb_inputs; i++) { + s->desc->connect_port(s->handles[h], s->ipmap[i], + (LADSPA_Data*)in->extended_data[i]); + } + + for (i = 0; i < s->nb_outputs; i++) { + s->desc->connect_port(s->handles[h], s->opmap[i], + (LADSPA_Data*)out->extended_data[i]); + } + + s->desc->run(s->handles[h], in->nb_samples); + } + + for (i = 0; i < s->nb_outputcontrols; i++) + print_ctl_info(ctx, AV_LOG_VERBOSE, s, i, s->ocmap, s->octlv, 1); + + if (out != in) + av_frame_free(&in); + + return ff_filter_frame(ctx->outputs[0], out); +} + +static int request_frame(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + LADSPAContext *s = ctx->priv; + AVFrame *out; + int64_t t; + int i; + + if (ctx->nb_inputs) + return ff_request_frame(ctx->inputs[0]); + + t = av_rescale(s->pts, AV_TIME_BASE, s->sample_rate); + if (s->duration >= 0 && t >= s->duration) + return AVERROR_EOF; + + out = ff_get_audio_buffer(outlink, s->nb_samples); + if (!out) + return AVERROR(ENOMEM); + + for (i = 0; i < s->nb_outputs; i++) + s->desc->connect_port(s->handles[0], s->opmap[i], + (LADSPA_Data*)out->extended_data[i]); + + s->desc->run(s->handles[0], s->nb_samples); + + for (i = 0; i < s->nb_outputcontrols; i++) + print_ctl_info(ctx, AV_LOG_INFO, s, i, s->ocmap, s->octlv, 1); + + out->sample_rate = s->sample_rate; + out->pts = s->pts; + s->pts += s->nb_samples; + + return ff_filter_frame(outlink, out); +} + +static void set_default_ctl_value(LADSPAContext *s, int ctl, + unsigned long *map, LADSPA_Data *values) +{ + const LADSPA_PortRangeHint *h = s->desc->PortRangeHints + map[ctl]; + const LADSPA_Data lower = h->LowerBound; + const LADSPA_Data upper = h->UpperBound; + + if (LADSPA_IS_HINT_DEFAULT_MINIMUM(h->HintDescriptor)) { + values[ctl] = lower; + } else if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(h->HintDescriptor)) { + values[ctl] = upper; + } else if (LADSPA_IS_HINT_DEFAULT_0(h->HintDescriptor)) { + values[ctl] = 0.0; + } else if (LADSPA_IS_HINT_DEFAULT_1(h->HintDescriptor)) { + values[ctl] = 1.0; + } else if (LADSPA_IS_HINT_DEFAULT_100(h->HintDescriptor)) { + values[ctl] = 100.0; + } else if (LADSPA_IS_HINT_DEFAULT_440(h->HintDescriptor)) { + values[ctl] = 440.0; + } else if (LADSPA_IS_HINT_DEFAULT_LOW(h->HintDescriptor)) { + if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor)) + values[ctl] = exp(log(lower) * 0.75 + log(upper) * 0.25); + else + values[ctl] = lower * 0.75 + upper * 0.25; + } else if (LADSPA_IS_HINT_DEFAULT_MIDDLE(h->HintDescriptor)) { + if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor)) + values[ctl] = exp(log(lower) * 0.5 + log(upper) * 0.5); + else + values[ctl] = lower * 0.5 + upper * 0.5; + } else if (LADSPA_IS_HINT_DEFAULT_HIGH(h->HintDescriptor)) { + if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor)) + values[ctl] = exp(log(lower) * 0.25 + log(upper) * 0.75); + else + values[ctl] = lower * 0.25 + upper * 0.75; + } +} + +static int connect_ports(AVFilterContext *ctx, AVFilterLink *link) +{ + LADSPAContext *s = ctx->priv; + int i, j; + + s->nb_handles = s->nb_inputs == 1 && s->nb_outputs == 1 ? link->channels : 1; + s->handles = av_calloc(s->nb_handles, sizeof(*s->handles)); + if (!s->handles) + return AVERROR(ENOMEM); + + for (i = 0; i < s->nb_handles; i++) { + s->handles[i] = s->desc->instantiate(s->desc, link->sample_rate); + if (!s->handles[i]) { + av_log(ctx, AV_LOG_ERROR, "Could not instantiate plugin.\n"); + return AVERROR_EXTERNAL; + } + + // Connect the input control ports + for (j = 0; j < s->nb_inputcontrols; j++) + s->desc->connect_port(s->handles[i], s->icmap[j], s->ictlv + j); + + // Connect the output control ports + for (j = 0; j < s->nb_outputcontrols; j++) + s->desc->connect_port(s->handles[i], s->ocmap[j], &s->octlv[j]); + + if (s->desc->activate) + s->desc->activate(s->handles[i]); + } + + av_log(ctx, AV_LOG_DEBUG, "handles: %d\n", s->nb_handles); + + return 0; +} + +static int config_input(AVFilterLink *inlink) +{ + AVFilterContext *ctx = inlink->dst; + + return connect_ports(ctx, inlink); +} + +static int config_output(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + int ret; + + if (ctx->nb_inputs) { + AVFilterLink *inlink = ctx->inputs[0]; + + outlink->format = inlink->format; + outlink->sample_rate = inlink->sample_rate; + + ret = 0; + } else { + LADSPAContext *s = ctx->priv; + + outlink->sample_rate = s->sample_rate; + outlink->time_base = (AVRational){1, s->sample_rate}; + + ret = connect_ports(ctx, outlink); + } + + return ret; +} + +static void count_ports(const LADSPA_Descriptor *desc, + unsigned long *nb_inputs, unsigned long *nb_outputs) +{ + LADSPA_PortDescriptor pd; + int i; + + for (i = 0; i < desc->PortCount; i++) { + pd = desc->PortDescriptors[i]; + + if (LADSPA_IS_PORT_AUDIO(pd)) { + if (LADSPA_IS_PORT_INPUT(pd)) { + (*nb_inputs)++; + } else if (LADSPA_IS_PORT_OUTPUT(pd)) { + (*nb_outputs)++; + } + } + } +} + +static void *try_load(const char *dir, const char *soname) +{ + char *path = av_asprintf("%s/%s.so", dir, soname); + void *ret = NULL; + + if (path) { + ret = dlopen(path, RTLD_LOCAL|RTLD_NOW); + av_free(path); + } + + return ret; +} + +static int set_control(AVFilterContext *ctx, unsigned long port, LADSPA_Data value) +{ + LADSPAContext *s = ctx->priv; + const char *label = s->desc->Label; + LADSPA_PortRangeHint *h = (LADSPA_PortRangeHint *)s->desc->PortRangeHints + + s->icmap[port]; + + if (port >= s->nb_inputcontrols) { + av_log(ctx, AV_LOG_ERROR, "Control c%ld is out of range [0 - %lu].\n", + port, s->nb_inputcontrols); + return AVERROR(EINVAL); + } + + if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor) && + value < h->LowerBound) { + av_log(ctx, AV_LOG_ERROR, + "%s: input control c%ld is below lower boundary of %0.4f.\n", + label, port, h->LowerBound); + return AVERROR(EINVAL); + } + + if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor) && + value > h->UpperBound) { + av_log(ctx, AV_LOG_ERROR, + "%s: input control c%ld is above upper boundary of %0.4f.\n", + label, port, h->UpperBound); + return AVERROR(EINVAL); + } + + s->ictlv[port] = value; + + return 0; +} + +static av_cold int init(AVFilterContext *ctx) +{ + LADSPAContext *s = ctx->priv; + LADSPA_Descriptor_Function descriptor_fn; + const LADSPA_Descriptor *desc; + LADSPA_PortDescriptor pd; + AVFilterPad pad = { NULL }; + char *p, *arg, *saveptr = NULL; + unsigned long nb_ports; + int i; + + if (!s->dl_name) { + av_log(ctx, AV_LOG_ERROR, "No plugin name provided\n"); + return AVERROR(EINVAL); + } + + if (s->dl_name[0] == '/' || s->dl_name[0] == '.') { + // argument is a path + s->dl_handle = dlopen(s->dl_name, RTLD_LOCAL|RTLD_NOW); + } else { + // argument is a shared object name + char *paths = av_strdup(getenv("LADSPA_PATH")); + const char *separator = ":"; + + if (paths) { + p = paths; + while ((arg = av_strtok(p, separator, &saveptr)) && !s->dl_handle) { + s->dl_handle = try_load(arg, s->dl_name); + p = NULL; + } + } + + av_free(paths); + if (!s->dl_handle && (paths = av_asprintf("%s/.ladspa/lib", getenv("HOME")))) { + s->dl_handle = try_load(paths, s->dl_name); + av_free(paths); + } + + if (!s->dl_handle) + s->dl_handle = try_load("/usr/local/lib/ladspa", s->dl_name); + + if (!s->dl_handle) + s->dl_handle = try_load("/usr/lib/ladspa", s->dl_name); + } + if (!s->dl_handle) { + av_log(ctx, AV_LOG_ERROR, "Failed to load '%s'\n", s->dl_name); + return AVERROR(EINVAL); + } + + descriptor_fn = dlsym(s->dl_handle, "ladspa_descriptor"); + if (!descriptor_fn) { + av_log(ctx, AV_LOG_ERROR, "Could not find ladspa_descriptor: %s\n", dlerror()); + return AVERROR(EINVAL); + } + + // Find the requested plugin, or list plugins + if (!s->plugin) { + av_log(ctx, AV_LOG_INFO, "The '%s' library contains the following plugins:\n", s->dl_name); + av_log(ctx, AV_LOG_INFO, "I = Input Channels\n"); + av_log(ctx, AV_LOG_INFO, "O = Output Channels\n"); + av_log(ctx, AV_LOG_INFO, "I:O %-25s %s\n", "Plugin", "Description"); + av_log(ctx, AV_LOG_INFO, "\n"); + for (i = 0; desc = descriptor_fn(i); i++) { + unsigned long inputs = 0, outputs = 0; + + count_ports(desc, &inputs, &outputs); + av_log(ctx, AV_LOG_INFO, "%lu:%lu %-25s %s\n", inputs, outputs, desc->Label, + (char *)av_x_if_null(desc->Name, "?")); + av_log(ctx, AV_LOG_VERBOSE, "Maker: %s\n", + (char *)av_x_if_null(desc->Maker, "?")); + av_log(ctx, AV_LOG_VERBOSE, "Copyright: %s\n", + (char *)av_x_if_null(desc->Copyright, "?")); + } + return AVERROR_EXIT; + } else { + for (i = 0;; i++) { + desc = descriptor_fn(i); + if (!desc) { + av_log(ctx, AV_LOG_ERROR, "Could not find plugin: %s\n", s->plugin); + return AVERROR(EINVAL); + } + + if (desc->Label && !strcmp(desc->Label, s->plugin)) + break; + } + } + + s->desc = desc; + nb_ports = desc->PortCount; + + s->ipmap = av_calloc(nb_ports, sizeof(*s->ipmap)); + s->opmap = av_calloc(nb_ports, sizeof(*s->opmap)); + s->icmap = av_calloc(nb_ports, sizeof(*s->icmap)); + s->ocmap = av_calloc(nb_ports, sizeof(*s->ocmap)); + s->ictlv = av_calloc(nb_ports, sizeof(*s->ictlv)); + s->octlv = av_calloc(nb_ports, sizeof(*s->octlv)); + s->ctl_needs_value = av_calloc(nb_ports, sizeof(*s->ctl_needs_value)); + if (!s->ipmap || !s->opmap || !s->icmap || + !s->ocmap || !s->ictlv || !s->octlv || !s->ctl_needs_value) + return AVERROR(ENOMEM); + + for (i = 0; i < nb_ports; i++) { + pd = desc->PortDescriptors[i]; + + if (LADSPA_IS_PORT_AUDIO(pd)) { + if (LADSPA_IS_PORT_INPUT(pd)) { + s->ipmap[s->nb_inputs] = i; + s->nb_inputs++; + } else if (LADSPA_IS_PORT_OUTPUT(pd)) { + s->opmap[s->nb_outputs] = i; + s->nb_outputs++; + } + } else if (LADSPA_IS_PORT_CONTROL(pd)) { + if (LADSPA_IS_PORT_INPUT(pd)) { + s->icmap[s->nb_inputcontrols] = i; + + if (LADSPA_IS_HINT_HAS_DEFAULT(desc->PortRangeHints[i].HintDescriptor)) + set_default_ctl_value(s, s->nb_inputcontrols, s->icmap, s->ictlv); + else + s->ctl_needs_value[s->nb_inputcontrols] = 1; + + s->nb_inputcontrols++; + } else if (LADSPA_IS_PORT_OUTPUT(pd)) { + s->ocmap[s->nb_outputcontrols] = i; + s->nb_outputcontrols++; + } + } + } + + // List Control Ports if "help" is specified + if (s->options && !strcmp(s->options, "help")) { + if (!s->nb_inputcontrols) { + av_log(ctx, AV_LOG_INFO, + "The '%s' plugin does not have any input controls.\n", + desc->Label); + } else { + av_log(ctx, AV_LOG_INFO, + "The '%s' plugin has the following input controls:\n", + desc->Label); + for (i = 0; i < s->nb_inputcontrols; i++) + print_ctl_info(ctx, AV_LOG_INFO, s, i, s->icmap, s->ictlv, 0); + } + return AVERROR_EXIT; + } + + // Parse control parameters + p = s->options; + while (s->options) { + LADSPA_Data val; + int ret; + + if (!(arg = av_strtok(p, "|", &saveptr))) + break; + p = NULL; + + if (sscanf(arg, "c%d=%f", &i, &val) != 2) { + av_log(ctx, AV_LOG_ERROR, "Invalid syntax.\n"); + return AVERROR(EINVAL); + } + + if ((ret = set_control(ctx, i, val)) < 0) + return ret; + s->ctl_needs_value[i] = 0; + } + + // Check if any controls are not set + for (i = 0; i < s->nb_inputcontrols; i++) { + if (s->ctl_needs_value[i]) { + av_log(ctx, AV_LOG_ERROR, "Control c%d must be set.\n", i); + print_ctl_info(ctx, AV_LOG_ERROR, s, i, s->icmap, s->ictlv, 0); + return AVERROR(EINVAL); + } + } + + pad.type = AVMEDIA_TYPE_AUDIO; + + if (s->nb_inputs) { + pad.name = av_asprintf("in0:%s%lu", desc->Label, s->nb_inputs); + if (!pad.name) + return AVERROR(ENOMEM); + + pad.filter_frame = filter_frame; + pad.config_props = config_input; + if (ff_insert_inpad(ctx, ctx->nb_inputs, &pad) < 0) { + av_freep(&pad.name); + return AVERROR(ENOMEM); + } + } + + av_log(ctx, AV_LOG_DEBUG, "ports: %lu\n", nb_ports); + av_log(ctx, AV_LOG_DEBUG, "inputs: %lu outputs: %lu\n", + s->nb_inputs, s->nb_outputs); + av_log(ctx, AV_LOG_DEBUG, "input controls: %lu output controls: %lu\n", + s->nb_inputcontrols, s->nb_outputcontrols); + + return 0; +} + +static int query_formats(AVFilterContext *ctx) +{ + LADSPAContext *s = ctx->priv; + AVFilterFormats *formats; + AVFilterChannelLayouts *layouts; + static const enum AVSampleFormat sample_fmts[] = { + AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE }; + + formats = ff_make_format_list(sample_fmts); + if (!formats) + return AVERROR(ENOMEM); + ff_set_common_formats(ctx, formats); + + if (s->nb_inputs) { + formats = ff_all_samplerates(); + if (!formats) + return AVERROR(ENOMEM); + + ff_set_common_samplerates(ctx, formats); + } else { + int sample_rates[] = { s->sample_rate, -1 }; + + ff_set_common_samplerates(ctx, ff_make_format_list(sample_rates)); + } + + if (s->nb_inputs == 1 && s->nb_outputs == 1) { + // We will instantiate multiple LADSPA_Handle, one over each channel + layouts = ff_all_channel_layouts(); + if (!layouts) + return AVERROR(ENOMEM); + + ff_set_common_channel_layouts(ctx, layouts); + } else { + AVFilterLink *outlink = ctx->outputs[0]; + + if (s->nb_inputs >= 1) { + AVFilterLink *inlink = ctx->inputs[0]; + int64_t inlayout = FF_COUNT2LAYOUT(s->nb_inputs); + + layouts = NULL; + ff_add_channel_layout(&layouts, inlayout); + ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts); + + if (!s->nb_outputs) + ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts); + } + + if (s->nb_outputs >= 1) { + int64_t outlayout = FF_COUNT2LAYOUT(s->nb_outputs); + + layouts = NULL; + ff_add_channel_layout(&layouts, outlayout); + ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts); + } + } + + return 0; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + LADSPAContext *s = ctx->priv; + int i; + + for (i = 0; i < s->nb_handles; i++) { + if (s->desc->deactivate) + s->desc->deactivate(s->handles[i]); + if (s->desc->cleanup) + s->desc->cleanup(s->handles[i]); + } + + if (s->dl_handle) + dlclose(s->dl_handle); + + av_freep(&s->ipmap); + av_freep(&s->opmap); + av_freep(&s->icmap); + av_freep(&s->ocmap); + av_freep(&s->ictlv); + av_freep(&s->octlv); + av_freep(&s->handles); + av_freep(&s->ctl_needs_value); + + if (ctx->nb_inputs) + av_freep(&ctx->input_pads[0].name); +} + +static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, + char *res, int res_len, int flags) +{ + LADSPA_Data value; + unsigned long port; + + if (sscanf(cmd, "c%ld", &port) + sscanf(args, "%f", &value) != 2) + return AVERROR(EINVAL); + + return set_control(ctx, port, value); +} + +static const AVFilterPad ladspa_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .config_props = config_output, + .request_frame = request_frame, + }, + { NULL } +}; + +AVFilter ff_af_ladspa = { + .name = "ladspa", + .description = NULL_IF_CONFIG_SMALL("Apply LADSPA effect."), + .priv_size = sizeof(LADSPAContext), + .priv_class = &ladspa_class, + .init = init, + .uninit = uninit, + .query_formats = query_formats, + .process_command = process_command, + .inputs = 0, + .outputs = ladspa_outputs, + .flags = AVFILTER_FLAG_DYNAMIC_INPUTS, +}; |
