/* * 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 #include #include "libavutil/avassert.h" #include "libavutil/avstring.h" #include "libavutil/channel_layout.h" #include "libavutil/fifo.h" #include "libavutil/opt.h" #include "audio.h" #include "avfilter.h" #include "formats.h" #include "internal.h" typedef struct MetaItem { int64_t pts; int nb_samples; } MetaItem; 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 next_in_pts; int64_t next_out_pts; int64_t pts; int64_t duration; int in_trim; int out_pad; int latency; AVFifo *fifo; } 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 }, { "latency", "enable latency compensation", OFFSET(latency), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS }, { "l", "enable latency compensation", OFFSET(latency), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS }, { NULL } }; AVFILTER_DEFINE_CLASS(ladspa); static int find_latency(AVFilterContext *ctx, LADSPAContext *s) { int latency = 0; for (int ctl = 0; ctl < s->nb_outputcontrols; ctl++) { if (av_strcasecmp("latency", s->desc->PortNames[s->ocmap[ctl]])) continue; latency = lrintf(s->octlv[ctl]); break; } return latency; } 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, ""); 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, ""); 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, p, new_out_samples; int64_t out_duration; int64_t in_duration; int64_t in_pts; MetaItem meta; av_assert0(in->ch_layout.nb_channels == (s->nb_inputs * s->nb_handles)); if (!s->nb_outputs || (av_frame_is_writable(in) && s->nb_inputs == s->nb_outputs && s->in_trim == 0 && s->out_pad == 0 && !(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); } av_assert0(!s->nb_outputs || out->ch_layout.nb_channels == (s->nb_outputs * s->nb_handles)); for (h = 0; h < s->nb_handles; h++) { for (i = 0; i < s->nb_inputs; i++) { p = s->nb_handles > 1 ? h : i; s->desc->connect_port(s->handles[h], s->ipmap[i], (LADSPA_Data*)in->extended_data[p]); } for (i = 0; i < s->nb_outputs; i++) { p = s->nb_handles > 1 ? h : i; s->desc->connect_port(s->handles[h], s->opmap[i], (LADSPA_Data*)out->extended_data[p]); } s->desc->run(s->handles[h], in->nb_samples); if (s->latency) s->in_trim = s->out_pad = find_latency(ctx, s); s->latency = 0; } for (i = 0; i < s->nb_outputcontrols; i++) print_ctl_info(ctx, AV_LOG_VERBOSE, s, i, s->ocmap, s->octlv, 1); meta = (MetaItem){ in->pts, in->nb_samples }; av_fifo_write(s->fifo, &meta, 1); if (out != in) av_frame_free(&in); new_out_samples = out->nb_samples; if (s->in_trim > 0) { int trim = FFMIN(new_out_samples, s->in_trim); new_out_samples -= trim; s->in_trim -= trim; } if (new_out_samples <= 0) { av_frame_free(&out); return 0; } else if (new_out_samples < out->nb_samples) { int offset = out->nb_samples - new_out_samples; for (int ch = 0; ch < out->ch_layout.nb_channels; ch++) memmove(out->extended_data[ch], out->extended_data[ch] + sizeof(float) * offset, sizeof(float) * new_out_samples); out->nb_samples = new_out_samples; } av_fifo_read(s->fifo, &meta, 1); out_duration = av_rescale_q(out->nb_samples, inlink->time_base, av_make_q(1, out->sample_rate)); in_duration = av_rescale_q(meta.nb_samples, inlink->time_base, av_make_q(1, out->sample_rate)); in_pts = meta.pts; if (s->next_out_pts != AV_NOPTS_VALUE && out->pts != s->next_out_pts && s->next_in_pts != AV_NOPTS_VALUE && in_pts == s->next_in_pts) { out->pts = s->next_out_pts; } else { out->pts = in_pts; } s->next_in_pts = in_pts + in_duration; s->next_out_pts = out->pts + out_duration; 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) { int ret = ff_request_frame(ctx->inputs[0]); if (ret == AVERROR_EOF && s->out_pad > 0) { AVFrame *frame = ff_get_audio_buffer(outlink, FFMIN(2048, s->out_pad)); if (!frame) return AVERROR(ENOMEM); s->out_pad -= frame->nb_samples; frame->pts = s->next_in_pts; return filter_frame(ctx->inputs[0], frame); } return ret; } 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->ch_layout.nb_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; LADSPAContext *s = ctx->priv; int ret; if (ctx->nb_inputs) { AVFilterLink *inlink = ctx->inputs[0]; outlink->format = inlink->format; outlink->sample_rate = inlink->sample_rate; if (s->nb_inputs == s->nb_outputs) { if ((ret = av_channel_layout_copy(&outlink->ch_layout, &inlink->ch_layout)) < 0) return ret; } ret = 0; } else { 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, j = 0, ret; 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 *home_path = getenv("HOME"); 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 && home_path && (paths = av_asprintf("%s/.ladspa", home_path))) { s->dl_handle = try_load(paths, s->dl_name); av_free(paths); } if (!s->dl_handle && home_path && (paths = av_asprintf("%s/.ladspa/lib", home_path))) { 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 (av_sscanf(arg, "c%d=%f", &i, &val) != 2) { if (av_sscanf(arg, "%f", &val) != 1) { av_log(ctx, AV_LOG_ERROR, "Invalid syntax.\n"); return AVERROR(EINVAL); } i = j++; } 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 ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0) return ret; } 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); s->next_out_pts = AV_NOPTS_VALUE; s->next_in_pts = AV_NOPTS_VALUE; s->fifo = av_fifo_alloc2(8, sizeof(MetaItem), AV_FIFO_FLAG_AUTO_GROW); if (!s->fifo) return AVERROR(ENOMEM); return 0; } static int query_formats(AVFilterContext *ctx) { LADSPAContext *s = ctx->priv; AVFilterChannelLayouts *layouts; static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE }; int ret = ff_set_common_formats_from_list(ctx, sample_fmts); if (ret < 0) return ret; if (s->nb_inputs) { ret = ff_set_common_all_samplerates(ctx); if (ret < 0) return ret; } else { int sample_rates[] = { s->sample_rate, -1 }; ret = ff_set_common_samplerates_from_list(ctx, sample_rates); if (ret < 0) return ret; } if (s->nb_inputs == 1 && s->nb_outputs == 1) { // We will instantiate multiple LADSPA_Handle, one over each channel ret = ff_set_common_all_channel_counts(ctx); if (ret < 0) return ret; } else if (s->nb_inputs == 2 && s->nb_outputs == 2) { layouts = NULL; ret = ff_add_channel_layout(&layouts, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO); if (ret < 0) return ret; ret = ff_set_common_channel_layouts(ctx, layouts); if (ret < 0) return ret; } else { AVFilterLink *outlink = ctx->outputs[0]; if (s->nb_inputs >= 1) { AVFilterLink *inlink = ctx->inputs[0]; AVChannelLayout inlayout = FF_COUNT2LAYOUT(s->nb_inputs); layouts = NULL; ret = ff_add_channel_layout(&layouts, &inlayout); if (ret < 0) return ret; ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts); if (ret < 0) return ret; if (!s->nb_outputs) { ret = ff_channel_layouts_ref(layouts, &outlink->incfg.channel_layouts); if (ret < 0) return ret; } } if (s->nb_outputs >= 1) { AVChannelLayout outlayout = FF_COUNT2LAYOUT(s->nb_outputs); layouts = NULL; ret = ff_add_channel_layout(&layouts, &outlayout); if (ret < 0) return ret; ret = ff_channel_layouts_ref(layouts, &outlink->incfg.channel_layouts); if (ret < 0) return ret; } } 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); av_fifo_freep2(&s->fifo); } 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 (av_sscanf(cmd, "c%ld", &port) + av_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, }, }; const 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, .process_command = process_command, .inputs = 0, FILTER_OUTPUTS(ladspa_outputs), FILTER_QUERY_FUNC(query_formats), .flags = AVFILTER_FLAG_DYNAMIC_INPUTS, };