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https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2026-03-03 01:40:51 -05:00
filter-chain: add ebur128 filter
The EBU R128 filter measures the signal and generates LUFS control notifications for further processing. It also adds a plugin that can convert LUFS to a gain (based on a target LUFS). Also add an example filter-chain to enable the EBU R128 measurement and how to use the results to adjust the volume dynamically. See #2286 #222 #2210
This commit is contained in:
Wim Taymans
parent
f0f9fbb009
commit
df271d13f3
6 changed files with 792 additions and 3 deletions
631
spa/plugins/filter-graph/ebur128_plugin.c
Normal file
631
spa/plugins/filter-graph/ebur128_plugin.c
Normal file
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@ -0,0 +1,631 @@
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#include "config.h"
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#include <limits.h>
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#include <spa/utils/json.h>
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#include <spa/support/log.h>
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#include "audio-plugin.h"
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#include "audio-dsp.h"
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#include <ebur128.h>
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struct plugin {
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struct spa_handle handle;
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struct spa_fga_plugin plugin;
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struct spa_fga_dsp *dsp;
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struct spa_log *log;
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uint32_t quantum_limit;
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};
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enum {
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PORT_IN_FL,
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PORT_IN_FR,
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PORT_IN_FC,
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PORT_IN_UNUSED,
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PORT_IN_SL,
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PORT_IN_SR,
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PORT_IN_DUAL_MONO,
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PORT_OUT_FL,
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PORT_OUT_FR,
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PORT_OUT_FC,
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PORT_OUT_UNUSED,
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PORT_OUT_SL,
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PORT_OUT_SR,
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PORT_OUT_DUAL_MONO,
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PORT_OUT_MOMENTARY,
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PORT_OUT_SHORTTERM,
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PORT_OUT_GLOBAL,
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PORT_OUT_WINDOW,
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PORT_OUT_RANGE,
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PORT_OUT_PEAK,
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PORT_OUT_TRUE_PEAK,
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PORT_MAX,
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PORT_IN_START = PORT_IN_FL,
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PORT_OUT_START = PORT_OUT_FL,
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PORT_NOTIFY_START = PORT_OUT_MOMENTARY,
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};
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struct ebur128_impl {
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struct plugin *plugin;
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struct spa_fga_dsp *dsp;
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struct spa_log *log;
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unsigned long rate;
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float *port[PORT_MAX];
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unsigned int max_history;
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unsigned int max_window;
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bool use_histogram;
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ebur128_state *st[7];
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};
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static void * ebur128_instantiate(const struct spa_fga_plugin *plugin, const struct spa_fga_descriptor * Descriptor,
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unsigned long SampleRate, int index, const char *config)
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{
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struct plugin *pl = SPA_CONTAINER_OF(plugin, struct plugin, plugin);
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struct ebur128_impl *impl;
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struct spa_json it[1];
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const char *val;
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char key[256];
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int len;
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float f;
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impl = calloc(1, sizeof(*impl));
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if (impl == NULL) {
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errno = ENOMEM;
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return NULL;
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}
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impl->plugin = pl;
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impl->dsp = pl->dsp;
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impl->log = pl->log;
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impl->max_history = 10000;
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impl->max_window = 0;
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impl->rate = SampleRate;
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if (config == NULL)
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return impl;
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if (spa_json_begin_object(&it[0], config, strlen(config)) <= 0) {
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spa_log_error(pl->log, "ebur128: expected object in config");
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errno = EINVAL;
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goto error;
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}
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while ((len = spa_json_object_next(&it[0], key, sizeof(key), &val)) > 0) {
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if (spa_streq(key, "max-history")) {
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if (spa_json_parse_float(val, len, &f) <= 0) {
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spa_log_error(impl->log, "ebur128:max-history requires a number");
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errno = EINVAL;
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goto error;
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}
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impl->max_history = (unsigned int) (f * 1000.0f);
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}
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else if (spa_streq(key, "max-window")) {
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if (spa_json_parse_float(val, len, &f) <= 0) {
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spa_log_error(impl->log, "ebur128:max-window requires a number");
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errno = EINVAL;
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goto error;
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}
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impl->max_window = (unsigned int) (f * 1000.0f);
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}
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else if (spa_streq(key, "use-histogram")) {
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if (spa_json_parse_bool(val, len, &impl->use_histogram) <= 0) {
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spa_log_error(impl->log, "ebur128:use-histogram requires a boolean");
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errno = EINVAL;
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goto error;
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}
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} else {
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spa_log_warn(impl->log, "ebur128: unknown key %s", key);
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}
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}
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return impl;
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error:
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free(impl);
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return NULL;
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}
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static void ebur128_run(void * Instance, unsigned long SampleCount)
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{
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struct ebur128_impl *impl = Instance;
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int i, c;
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double value;
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ebur128_state *st[7];
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for (i = 0; i < 7; i++) {
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float *in = impl->port[PORT_IN_START + i];
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float *out = impl->port[PORT_OUT_START + i];
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st[i] = NULL;
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if (in == NULL)
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continue;
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st[i] = impl->st[i];
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if (st[i] != NULL)
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ebur128_add_frames_float(st[i], in, SampleCount);
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if (out != NULL)
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memcpy(out, in, SampleCount * sizeof(float));
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}
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if (impl->port[PORT_OUT_MOMENTARY] != NULL) {
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double sum = 0.0;
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for (i = 0, c = 0; i < 7; i++) {
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if (st[i] != NULL) {
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ebur128_loudness_momentary(st[i], &value);
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sum += value;
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c++;
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}
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}
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impl->port[PORT_OUT_MOMENTARY][0] = (float) (sum / c);
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}
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if (impl->port[PORT_OUT_SHORTTERM] != NULL) {
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double sum = 0.0;
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for (i = 0, c = 0; i < 7; i++) {
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if (st[i] != NULL) {
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ebur128_loudness_shortterm(st[i], &value);
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sum += value;
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c++;
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}
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}
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impl->port[PORT_OUT_SHORTTERM][0] = (float) (sum / c);
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}
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if (impl->port[PORT_OUT_GLOBAL] != NULL) {
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ebur128_loudness_global_multiple(st, 7, &value);
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impl->port[PORT_OUT_GLOBAL][0] = (float)value;
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}
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if (impl->port[PORT_OUT_WINDOW] != NULL) {
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double sum = 0.0;
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for (i = 0, c = 0; i < 7; i++) {
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if (st[i] != NULL) {
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ebur128_loudness_window(st[i], impl->max_window, &value);
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sum += value;
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c++;
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}
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}
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impl->port[PORT_OUT_WINDOW][0] = (float) (sum / c);
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}
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if (impl->port[PORT_OUT_RANGE] != NULL) {
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ebur128_loudness_range_multiple(st, 7, &value);
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impl->port[PORT_OUT_RANGE][0] = (float)value;
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}
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if (impl->port[PORT_OUT_PEAK] != NULL) {
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double max = 0.0;
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for (i = 0; i < 7; i++) {
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if (st[i] != NULL) {
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ebur128_sample_peak(st[i], i, &value);
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max = SPA_MAX(max, value);
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}
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}
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impl->port[PORT_OUT_PEAK][0] = (float) max;
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}
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if (impl->port[PORT_OUT_TRUE_PEAK] != NULL) {
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double max = 0.0;
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for (i = 0; i < 7; i++) {
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if (st[i] != NULL) {
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ebur128_true_peak(st[i], i, &value);
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max = SPA_MAX(max, value);
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}
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}
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impl->port[PORT_OUT_TRUE_PEAK][0] = (float) max;
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}
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}
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static void ebur128_connect_port(void * Instance, unsigned long Port,
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float * DataLocation)
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{
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struct ebur128_impl *impl = Instance;
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if (Port < PORT_MAX)
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impl->port[Port] = DataLocation;
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}
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static void ebur128_cleanup(void * Instance)
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{
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struct ebur128_impl *impl = Instance;
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free(impl);
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}
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static void ebur128_activate(void * Instance)
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{
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struct ebur128_impl *impl = Instance;
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int mode = 0, i;
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int modes[] = {
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EBUR128_MODE_M,
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EBUR128_MODE_S,
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EBUR128_MODE_I,
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0,
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EBUR128_MODE_LRA,
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EBUR128_MODE_SAMPLE_PEAK,
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EBUR128_MODE_TRUE_PEAK,
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};
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enum channel channels[] = {
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EBUR128_LEFT,
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EBUR128_RIGHT,
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EBUR128_CENTER,
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EBUR128_UNUSED,
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EBUR128_LEFT_SURROUND,
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EBUR128_RIGHT_SURROUND,
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EBUR128_DUAL_MONO,
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};
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if (impl->use_histogram)
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mode |= EBUR128_MODE_HISTOGRAM;
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/* check modes */
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for (i = 0; i < 7; i++) {
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if (impl->port[PORT_NOTIFY_START + i] != NULL)
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mode |= modes[i];
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}
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for (i = 0; i < 7; i++) {
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impl->st[i] = ebur128_init(1, impl->rate, mode);
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if (impl->st[i]) {
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ebur128_set_channel(impl->st[i], i, channels[i]);
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ebur128_set_max_history(impl->st[i], impl->max_history);
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ebur128_set_max_window(impl->st[i], impl->max_window);
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}
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}
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}
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static void ebur128_deactivate(void * Instance)
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{
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struct ebur128_impl *impl = Instance;
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int i;
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for (i = 0; i < 7; i++) {
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if (impl->st[i] != NULL)
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ebur128_destroy(&impl->st[i]);
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}
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}
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static struct spa_fga_port ebur128_ports[] = {
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{ .index = PORT_IN_FL,
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.name = "In FL",
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.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_IN_FR,
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.name = "In FR",
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.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_IN_FC,
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.name = "In FC",
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.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_IN_UNUSED,
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.name = "In UNUSED",
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.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_IN_SL,
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.name = "In SL",
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.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_IN_SR,
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.name = "In SR",
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.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_IN_DUAL_MONO,
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.name = "In DUAL MONO",
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.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_OUT_FL,
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.name = "Out FL",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_OUT_FR,
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.name = "Out FR",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_OUT_FC,
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.name = "Out FC",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_OUT_UNUSED,
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.name = "Out UNUSED",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_OUT_SL,
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.name = "Out SL",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_OUT_SR,
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.name = "Out SR",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_OUT_DUAL_MONO,
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.name = "Out DUAL MONO",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_AUDIO,
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},
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{ .index = PORT_OUT_MOMENTARY,
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.name = "Momentary LUFS",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_CONTROL,
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},
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{ .index = PORT_OUT_SHORTTERM,
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.name = "Shorttem LUFS",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_CONTROL,
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},
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{ .index = PORT_OUT_GLOBAL,
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.name = "Global LUFS",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_CONTROL,
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},
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{ .index = PORT_OUT_WINDOW,
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.name = "Window LUFS",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_CONTROL,
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},
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{ .index = PORT_OUT_RANGE,
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.name = "Range LU",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_CONTROL,
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},
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{ .index = PORT_OUT_PEAK,
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.name = "Peak",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_CONTROL,
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},
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{ .index = PORT_OUT_TRUE_PEAK,
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.name = "True Peak",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_CONTROL,
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},
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};
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static const struct spa_fga_descriptor ebur128_desc = {
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.name = "ebur128",
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.flags = SPA_FGA_DESCRIPTOR_SUPPORTS_NULL_DATA,
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.ports = ebur128_ports,
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.n_ports = SPA_N_ELEMENTS(ebur128_ports),
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.instantiate = ebur128_instantiate,
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.connect_port = ebur128_connect_port,
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.activate = ebur128_activate,
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.deactivate = ebur128_deactivate,
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.run = ebur128_run,
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.cleanup = ebur128_cleanup,
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};
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static struct spa_fga_port lufs2gain_ports[] = {
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{ .index = 0,
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.name = "LUFS",
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.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_CONTROL,
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},
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{ .index = 1,
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.name = "Gain",
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.flags = SPA_FGA_PORT_OUTPUT | SPA_FGA_PORT_CONTROL,
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},
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{ .index = 2,
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.name = "Target LUFS",
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.flags = SPA_FGA_PORT_INPUT | SPA_FGA_PORT_CONTROL,
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.def = -23.0f, .min = -70.0f, .max = 0.0f
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},
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};
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struct lufs2gain_impl {
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struct plugin *plugin;
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struct spa_fga_dsp *dsp;
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struct spa_log *log;
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unsigned long rate;
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float *port[3];
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};
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static void * lufs2gain_instantiate(const struct spa_fga_plugin *plugin, const struct spa_fga_descriptor * Descriptor,
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unsigned long SampleRate, int index, const char *config)
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{
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struct plugin *pl = SPA_CONTAINER_OF(plugin, struct plugin, plugin);
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struct lufs2gain_impl *impl;
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impl = calloc(1, sizeof(*impl));
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if (impl == NULL) {
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errno = ENOMEM;
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return NULL;
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}
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impl->plugin = pl;
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impl->dsp = pl->dsp;
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impl->log = pl->log;
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impl->rate = SampleRate;
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return impl;
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}
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static void lufs2gain_connect_port(void * Instance, unsigned long Port,
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float * DataLocation)
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{
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struct lufs2gain_impl *impl = Instance;
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if (Port < 3)
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impl->port[Port] = DataLocation;
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}
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static void lufs2gain_run(void * Instance, unsigned long SampleCount)
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{
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struct lufs2gain_impl *impl = Instance;
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float *in = impl->port[0];
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float *out = impl->port[1];
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float *target = impl->port[2];
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float gain;
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if (in == NULL || out == NULL || target == NULL)
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return;
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if (isfinite(in[0])) {
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float gaindB = target[0] - in[0];
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gain = powf(10.0f, gaindB / 20.0f);
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} else {
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gain = 1.0f;
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}
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out[0] = gain;
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}
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|
||||
static void lufs2gain_cleanup(void * Instance)
|
||||
{
|
||||
struct lufs2gain_impl *impl = Instance;
|
||||
free(impl);
|
||||
}
|
||||
|
||||
static const struct spa_fga_descriptor lufs2gain_desc = {
|
||||
.name = "lufs2gain",
|
||||
.flags = SPA_FGA_DESCRIPTOR_SUPPORTS_NULL_DATA,
|
||||
|
||||
.ports = lufs2gain_ports,
|
||||
.n_ports = SPA_N_ELEMENTS(lufs2gain_ports),
|
||||
|
||||
.instantiate = lufs2gain_instantiate,
|
||||
.connect_port = lufs2gain_connect_port,
|
||||
.run = lufs2gain_run,
|
||||
.cleanup = lufs2gain_cleanup,
|
||||
};
|
||||
|
||||
static const struct spa_fga_descriptor * ebur128_descriptor(unsigned long Index)
|
||||
{
|
||||
switch(Index) {
|
||||
case 0:
|
||||
return &ebur128_desc;
|
||||
case 1:
|
||||
return &lufs2gain_desc;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
static const struct spa_fga_descriptor *ebur128_plugin_make_desc(void *plugin, const char *name)
|
||||
{
|
||||
unsigned long i;
|
||||
for (i = 0; ;i++) {
|
||||
const struct spa_fga_descriptor *d = ebur128_descriptor(i);
|
||||
if (d == NULL)
|
||||
break;
|
||||
if (spa_streq(d->name, name))
|
||||
return d;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static struct spa_fga_plugin_methods impl_plugin = {
|
||||
SPA_VERSION_FGA_PLUGIN_METHODS,
|
||||
.make_desc = ebur128_plugin_make_desc,
|
||||
};
|
||||
|
||||
static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
|
||||
{
|
||||
struct plugin *impl;
|
||||
|
||||
spa_return_val_if_fail(handle != NULL, -EINVAL);
|
||||
spa_return_val_if_fail(interface != NULL, -EINVAL);
|
||||
|
||||
impl = (struct plugin *) handle;
|
||||
|
||||
if (spa_streq(type, SPA_TYPE_INTERFACE_FILTER_GRAPH_AudioPlugin))
|
||||
*interface = &impl->plugin;
|
||||
else
|
||||
return -ENOENT;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int impl_clear(struct spa_handle *handle)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static size_t
|
||||
impl_get_size(const struct spa_handle_factory *factory,
|
||||
const struct spa_dict *params)
|
||||
{
|
||||
return sizeof(struct plugin);
|
||||
}
|
||||
|
||||
static int
|
||||
impl_init(const struct spa_handle_factory *factory,
|
||||
struct spa_handle *handle,
|
||||
const struct spa_dict *info,
|
||||
const struct spa_support *support,
|
||||
uint32_t n_support)
|
||||
{
|
||||
struct plugin *impl;
|
||||
|
||||
handle->get_interface = impl_get_interface;
|
||||
handle->clear = impl_clear;
|
||||
|
||||
impl = (struct plugin *) handle;
|
||||
|
||||
impl->plugin.iface = SPA_INTERFACE_INIT(
|
||||
SPA_TYPE_INTERFACE_FILTER_GRAPH_AudioPlugin,
|
||||
SPA_VERSION_FGA_PLUGIN,
|
||||
&impl_plugin, impl);
|
||||
|
||||
impl->quantum_limit = 8192u;
|
||||
|
||||
impl->log = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log);
|
||||
impl->dsp = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_FILTER_GRAPH_AudioDSP);
|
||||
|
||||
for (uint32_t i = 0; info && i < info->n_items; i++) {
|
||||
const char *k = info->items[i].key;
|
||||
const char *s = info->items[i].value;
|
||||
if (spa_streq(k, "clock.quantum-limit"))
|
||||
spa_atou32(s, &impl->quantum_limit, 0);
|
||||
if (spa_streq(k, "filter.graph.audio.dsp"))
|
||||
sscanf(s, "pointer:%p", &impl->dsp);
|
||||
}
|
||||
if (impl->dsp == NULL) {
|
||||
spa_log_error(impl->log, "%p: could not find DSP functions", impl);
|
||||
return -EINVAL;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct spa_interface_info impl_interfaces[] = {
|
||||
{SPA_TYPE_INTERFACE_FILTER_GRAPH_AudioPlugin,},
|
||||
};
|
||||
|
||||
static int
|
||||
impl_enum_interface_info(const struct spa_handle_factory *factory,
|
||||
const struct spa_interface_info **info,
|
||||
uint32_t *index)
|
||||
{
|
||||
spa_return_val_if_fail(factory != NULL, -EINVAL);
|
||||
spa_return_val_if_fail(info != NULL, -EINVAL);
|
||||
spa_return_val_if_fail(index != NULL, -EINVAL);
|
||||
|
||||
switch (*index) {
|
||||
case 0:
|
||||
*info = &impl_interfaces[*index];
|
||||
break;
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
(*index)++;
|
||||
return 1;
|
||||
}
|
||||
|
||||
static struct spa_handle_factory spa_fga_ebur128_plugin_factory = {
|
||||
SPA_VERSION_HANDLE_FACTORY,
|
||||
"filter.graph.plugin.ebur128",
|
||||
NULL,
|
||||
impl_get_size,
|
||||
impl_init,
|
||||
impl_enum_interface_info,
|
||||
};
|
||||
|
||||
SPA_EXPORT
|
||||
int spa_handle_factory_enum(const struct spa_handle_factory **factory, uint32_t *index)
|
||||
{
|
||||
spa_return_val_if_fail(factory != NULL, -EINVAL);
|
||||
spa_return_val_if_fail(index != NULL, -EINVAL);
|
||||
|
||||
switch (*index) {
|
||||
case 0:
|
||||
*factory = &spa_fga_ebur128_plugin_factory;
|
||||
break;
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
(*index)++;
|
||||
return 1;
|
||||
}
|
||||
|
|
@ -105,3 +105,13 @@ spa_filter_graph_plugin_lv2 = shared_library('spa-filter-graph-plugin-lv2',
|
|||
)
|
||||
endif
|
||||
|
||||
if ebur128_lib.found()
|
||||
spa_filter_graph_plugin_ebur128 = shared_library('spa-filter-graph-plugin-ebur128',
|
||||
[ 'ebur128_plugin.c' ],
|
||||
include_directories : [configinc],
|
||||
install : true,
|
||||
install_dir : spa_plugindir / 'filter-graph',
|
||||
dependencies : [ filter_graph_dependencies, lilv_lib, ebur128_lib ]
|
||||
)
|
||||
endif
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue