pipewire/src/modules/module-protocol-pulse/volume.c

/* PipeWire */
/* SPDX-FileCopyrightText: Copyright © 2020 Wim Taymans */
/* SPDX-License-Identifier: MIT */

#include <spa/param/props.h>
#include <spa/param/audio/raw.h>
#include <spa/pod/iter.h>
#include <spa/utils/defs.h>
#include <pipewire/log.h>

#include "log.h"
#include "volume.h"

int volume_compare(struct volume *vol, struct volume *other)
{
	uint8_t i;
	if (vol->channels != other->channels) {
		pw_log_info("channels %d<>%d", vol->channels, other->channels);
		return -1;
	}
	for (i = 0; i < vol->channels; i++) {
		if (vol->values[i] != other->values[i]) {
			pw_log_info("%d: val %f<>%f", i, vol->values[i], other->values[i]);
			return -1;
		}
	}
	return 0;
}

int volume_parse_param(const struct spa_pod *param, struct volume_info *info, bool monitor)
{
	struct spa_pod_object *obj = (struct spa_pod_object *) param;
	struct spa_pod_prop *prop;

	SPA_POD_OBJECT_FOREACH(obj, prop) {
		switch (prop->key) {
		case SPA_PROP_volume:
			if (spa_pod_get_float(&prop->value, &info->level) < 0)
				continue;
			SPA_FLAG_UPDATE(info->flags, VOLUME_HW_VOLUME,
					prop->flags & SPA_POD_PROP_FLAG_HARDWARE);

			break;
		case SPA_PROP_mute:
			if (monitor)
				continue;
			if (spa_pod_get_bool(&prop->value, &info->mute) < 0)
				continue;
			SPA_FLAG_UPDATE(info->flags, VOLUME_HW_MUTE,
					prop->flags & SPA_POD_PROP_FLAG_HARDWARE);
			break;
		case SPA_PROP_channelVolumes:
			if (monitor)
				continue;
			info->volume.channels = spa_pod_copy_array(&prop->value, SPA_TYPE_Float,
					info->volume.values, SPA_AUDIO_MAX_CHANNELS);
			SPA_FLAG_UPDATE(info->flags, VOLUME_HW_VOLUME,
					prop->flags & SPA_POD_PROP_FLAG_HARDWARE);
			break;
		case SPA_PROP_monitorMute:
			if (!monitor)
				continue;
			if (spa_pod_get_bool(&prop->value, &info->mute) < 0)
				continue;
			SPA_FLAG_CLEAR(info->flags, VOLUME_HW_MUTE);
			break;
		case SPA_PROP_monitorVolumes:
			if (!monitor)
				continue;
			info->volume.channels = spa_pod_copy_array(&prop->value, SPA_TYPE_Float,
					info->volume.values, SPA_AUDIO_MAX_CHANNELS);
			SPA_FLAG_CLEAR(info->flags, VOLUME_HW_VOLUME);
			break;
		case SPA_PROP_volumeBase:
			if (spa_pod_get_float(&prop->value, &info->base) < 0)
				continue;
			break;
		case SPA_PROP_volumeStep:
		{
			float step;
			if (spa_pod_get_float(&prop->value, &step) >= 0)
				info->steps = 0x10000u * step;
			break;
		}
		case SPA_PROP_channelMap:
			info->map.channels = spa_pod_copy_array(&prop->value, SPA_TYPE_Id,
					info->map.map, SPA_AUDIO_MAX_CHANNELS);
			break;
		default:
			break;
		}
	}
	return 0;
}