Adding upstream version 0.3.65.upstream/0.3.65upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2945 insertions, 0 deletions

diff --git a/spa/plugins/audioconvert/audioconvert.c b/spa/plugins/audioconvert/audioconvert.c
new file mode 100644
index 0000000..970df16
--- /dev/null
+++ b/spa/plugins/audioconvert/audioconvert.c
@@ -0,0 +1,2945 @@
+/* Spa
+ *
+ * Copyright © 2022 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <limits.h>
+
+#include <spa/support/plugin.h>
+#include <spa/support/cpu.h>
+#include <spa/support/log.h>
+#include <spa/utils/result.h>
+#include <spa/utils/list.h>
+#include <spa/utils/json.h>
+#include <spa/utils/names.h>
+#include <spa/utils/string.h>
+#include <spa/node/node.h>
+#include <spa/node/io.h>
+#include <spa/node/utils.h>
+#include <spa/node/keys.h>
+#include <spa/param/audio/format-utils.h>
+#include <spa/param/param.h>
+#include <spa/param/latency-utils.h>
+#include <spa/pod/filter.h>
+#include <spa/debug/types.h>
+
+#include "volume-ops.h"
+#include "fmt-ops.h"
+#include "channelmix-ops.h"
+#include "resample.h"
+
+#undef SPA_LOG_TOPIC_DEFAULT
+#define SPA_LOG_TOPIC_DEFAULT log_topic
+static struct spa_log_topic *log_topic = &SPA_LOG_TOPIC(0, "spa.audioconvert");
+
+#define DEFAULT_RATE		48000
+#define DEFAULT_CHANNELS	2
+
+#define MAX_ALIGN	FMT_OPS_MAX_ALIGN
+#define MAX_BUFFERS	32
+#define MAX_DATAS	SPA_AUDIO_MAX_CHANNELS
+#define MAX_PORTS	(SPA_AUDIO_MAX_CHANNELS+1)
+
+#define DEFAULT_MUTE	false
+#define DEFAULT_VOLUME	VOLUME_NORM
+
+struct volumes {
+	bool mute;
+	uint32_t n_volumes;
+	float volumes[SPA_AUDIO_MAX_CHANNELS];
+};
+
+static void init_volumes(struct volumes *vol)
+{
+	uint32_t i;
+	vol->mute = DEFAULT_MUTE;
+	vol->n_volumes = 0;
+	for (i = 0; i < SPA_AUDIO_MAX_CHANNELS; i++)
+		vol->volumes[i] = DEFAULT_VOLUME;
+}
+
+struct props {
+	float volume;
+	uint32_t n_channels;
+	uint32_t channel_map[SPA_AUDIO_MAX_CHANNELS];
+	struct volumes channel;
+	struct volumes soft;
+	struct volumes monitor;
+	unsigned int have_soft_volume:1;
+	unsigned int mix_disabled:1;
+	unsigned int resample_disabled:1;
+	unsigned int resample_quality;
+	double rate;
+};
+
+static void props_reset(struct props *props)
+{
+	uint32_t i;
+	props->volume = DEFAULT_VOLUME;
+	props->n_channels = 0;
+	for (i = 0; i < SPA_AUDIO_MAX_CHANNELS; i++)
+		props->channel_map[i] = SPA_AUDIO_CHANNEL_UNKNOWN;
+	init_volumes(&props->channel);
+	init_volumes(&props->soft);
+	init_volumes(&props->monitor);
+	props->have_soft_volume = false;
+	props->mix_disabled = false;
+	props->resample_disabled = false;
+	props->resample_quality = RESAMPLE_DEFAULT_QUALITY;
+	props->rate = 1.0;
+}
+
+struct buffer {
+	uint32_t id;
+#define BUFFER_FLAG_QUEUED	(1<<0)
+	uint32_t flags;
+	struct spa_list link;
+	struct spa_buffer *buf;
+	void *datas[MAX_DATAS];
+};
+
+struct port {
+	uint32_t direction;
+	uint32_t id;
+
+	struct spa_io_buffers *io;
+
+	uint64_t info_all;
+	struct spa_port_info info;
+#define IDX_EnumFormat	0
+#define IDX_Meta	1
+#define IDX_IO		2
+#define IDX_Format	3
+#define IDX_Buffers	4
+#define IDX_Latency	5
+#define N_PORT_PARAMS	6
+	struct spa_param_info params[N_PORT_PARAMS];
+	char position[16];
+
+	struct buffer buffers[MAX_BUFFERS];
+	uint32_t n_buffers;
+
+	struct spa_audio_info format;
+	unsigned int have_format:1;
+	unsigned int is_dsp:1;
+	unsigned int is_monitor:1;
+	unsigned int is_control:1;
+
+	uint32_t blocks;
+	uint32_t stride;
+
+	const struct spa_pod_sequence *ctrl;
+	uint32_t ctrl_offset;
+
+	struct spa_list queue;
+};
+
+struct dir {
+	struct port *ports[MAX_PORTS];
+	uint32_t n_ports;
+
+	enum spa_direction direction;
+	enum spa_param_port_config_mode mode;
+
+	struct spa_audio_info format;
+	unsigned int have_format:1;
+	unsigned int have_profile:1;
+	struct spa_latency_info latency;
+
+	uint32_t remap[MAX_PORTS];
+
+	struct convert conv;
+	unsigned int need_remap:1;
+	unsigned int is_passthrough:1;
+	unsigned int control:1;
+};
+
+struct impl {
+	struct spa_handle handle;
+	struct spa_node node;
+
+	struct spa_log *log;
+	struct spa_cpu *cpu;
+
+	uint32_t cpu_flags;
+	uint32_t max_align;
+	uint32_t quantum_limit;
+	enum spa_direction direction;
+
+	struct props props;
+
+	struct spa_io_position *io_position;
+	struct spa_io_rate_match *io_rate_match;
+
+	uint64_t info_all;
+	struct spa_node_info info;
+#define IDX_EnumPortConfig	0
+#define IDX_PortConfig		1
+#define IDX_PropInfo		2
+#define IDX_Props		3
+#define N_NODE_PARAMS		4
+	struct spa_param_info params[N_NODE_PARAMS];
+
+	struct spa_hook_list hooks;
+
+	unsigned int monitor:1;
+	unsigned int monitor_channel_volumes:1;
+
+	struct dir dir[2];
+	struct channelmix mix;
+	struct resample resample;
+	struct volume volume;
+	double rate_scale;
+
+	uint32_t in_offset;
+	uint32_t out_offset;
+	unsigned int started:1;
+	unsigned int setup:1;
+	unsigned int resample_peaks:1;
+	unsigned int is_passthrough:1;
+	unsigned int drained:1;
+	unsigned int rate_adjust:1;
+
+	uint32_t empty_size;
+	float *empty;
+	float *scratch;
+	float *tmp[2];
+	float *tmp_datas[2][MAX_PORTS];
+};
+
+#define CHECK_PORT(this,d,p)		((p) < this->dir[d].n_ports)
+#define GET_PORT(this,d,p)		(this->dir[d].ports[p])
+#define GET_IN_PORT(this,p)		GET_PORT(this,SPA_DIRECTION_INPUT,p)
+#define GET_OUT_PORT(this,p)		GET_PORT(this,SPA_DIRECTION_OUTPUT,p)
+
+#define PORT_IS_DSP(this,d,p)		(GET_PORT(this,d,p)->is_dsp)
+#define PORT_IS_CONTROL(this,d,p)	(GET_PORT(this,d,p)->is_control)
+
+static void set_volume(struct impl *this);
+
+static void emit_node_info(struct impl *this, bool full)
+{
+	uint64_t old = full ? this->info.change_mask : 0;
+
+	if (full)
+		this->info.change_mask = this->info_all;
+	if (this->info.change_mask) {
+		if (this->info.change_mask & SPA_NODE_CHANGE_MASK_PARAMS) {
+			SPA_FOR_EACH_ELEMENT_VAR(this->params, p) {
+				if (p->user > 0) {
+					p->flags ^= SPA_PARAM_INFO_SERIAL;
+					p->user = 0;
+				}
+			}
+		}
+		spa_node_emit_info(&this->hooks, &this->info);
+		this->info.change_mask = old;
+	}
+}
+
+static void emit_port_info(struct impl *this, struct port *port, bool full)
+{
+	uint64_t old = full ? port->info.change_mask : 0;
+
+	if (full)
+		port->info.change_mask = port->info_all;
+	if (port->info.change_mask) {
+		struct spa_dict_item items[3];
+		uint32_t n_items = 0;
+
+		if (PORT_IS_DSP(this, port->direction, port->id)) {
+			items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_FORMAT_DSP, "32 bit float mono audio");
+			items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_AUDIO_CHANNEL, port->position);
+			if (port->is_monitor)
+				items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_PORT_MONITOR, "true");
+		} else if (PORT_IS_CONTROL(this, port->direction, port->id)) {
+			items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_PORT_NAME, "control");
+			items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_FORMAT_DSP, "8 bit raw midi");
+		}
+		port->info.props = &SPA_DICT_INIT(items, n_items);
+
+		if (port->info.change_mask & SPA_PORT_CHANGE_MASK_PARAMS) {
+			SPA_FOR_EACH_ELEMENT_VAR(port->params, p) {
+				if (p->user > 0) {
+					p->flags ^= SPA_PARAM_INFO_SERIAL;
+					p->user = 0;
+				}
+			}
+		}
+		spa_node_emit_port_info(&this->hooks, port->direction, port->id, &port->info);
+		port->info.change_mask = old;
+	}
+}
+
+static int init_port(struct impl *this, enum spa_direction direction, uint32_t port_id,
+		uint32_t position, bool is_dsp, bool is_monitor, bool is_control)
+{
+	struct port *port = GET_PORT(this, direction, port_id);
+	const char *name;
+
+	spa_assert(port_id < MAX_PORTS);
+
+	if (port == NULL) {
+		port = calloc(1, sizeof(struct port));
+		if (port == NULL)
+			return -errno;
+		this->dir[direction].ports[port_id] = port;
+	}
+	port->direction = direction;
+	port->id = port_id;
+
+	name = spa_debug_type_find_short_name(spa_type_audio_channel, position);
+	snprintf(port->position, sizeof(port->position), "%s", name ? name : "UNK");
+
+	port->info_all = SPA_PORT_CHANGE_MASK_FLAGS |
+			SPA_PORT_CHANGE_MASK_PROPS |
+			SPA_PORT_CHANGE_MASK_PARAMS;
+	port->info = SPA_PORT_INFO_INIT();
+	port->info.flags = SPA_PORT_FLAG_NO_REF |
+		SPA_PORT_FLAG_DYNAMIC_DATA;
+	port->params[IDX_EnumFormat] = SPA_PARAM_INFO(SPA_PARAM_EnumFormat, SPA_PARAM_INFO_READ);
+	port->params[IDX_Meta] = SPA_PARAM_INFO(SPA_PARAM_Meta, SPA_PARAM_INFO_READ);
+	port->params[IDX_IO] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ);
+	port->params[IDX_Format] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
+	port->params[IDX_Buffers] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
+	port->params[IDX_Latency] = SPA_PARAM_INFO(SPA_PARAM_Latency, SPA_PARAM_INFO_READWRITE);
+	port->info.params = port->params;
+	port->info.n_params = N_PORT_PARAMS;
+
+	port->n_buffers = 0;
+	port->have_format = false;
+	port->is_monitor = is_monitor;
+	port->is_dsp = is_dsp;
+	if (port->is_dsp) {
+		port->format.media_type = SPA_MEDIA_TYPE_audio;
+		port->format.media_subtype = SPA_MEDIA_SUBTYPE_dsp;
+		port->format.info.dsp.format = SPA_AUDIO_FORMAT_DSP_F32;
+		port->blocks = 1;
+		port->stride = 4;
+	}
+	port->is_control = is_control;
+	if (port->is_control) {
+		port->format.media_type = SPA_MEDIA_TYPE_application;
+		port->format.media_subtype = SPA_MEDIA_SUBTYPE_control;
+		port->blocks = 1;
+		port->stride = 1;
+	}
+	spa_list_init(&port->queue);
+
+	spa_log_info(this->log, "%p: add port %d:%d position:%s %d %d %d",
+			this, direction, port_id, port->position, is_dsp, is_monitor, is_control);
+	emit_port_info(this, port, true);
+
+	return 0;
+}
+
+static int impl_node_enum_params(void *object, int seq,
+				 uint32_t id, uint32_t start, uint32_t num,
+				 const struct spa_pod *filter)
+{
+	struct impl *this = object;
+	struct spa_pod *param;
+	struct spa_pod_builder b = { 0 };
+	uint8_t buffer[4096];
+	struct spa_result_node_params result;
+	uint32_t count = 0;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(num != 0, -EINVAL);
+
+	result.id = id;
+	result.next = start;
+      next:
+	result.index = result.next++;
+
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+
+	switch (id) {
+	case SPA_PARAM_EnumPortConfig:
+	{
+		struct dir *dir;
+		switch (result.index) {
+		case 0:
+			dir = &this->dir[SPA_DIRECTION_INPUT];;
+			break;
+		case 1:
+			dir = &this->dir[SPA_DIRECTION_OUTPUT];;
+			break;
+		default:
+			return 0;
+		}
+		param = spa_pod_builder_add_object(&b,
+			SPA_TYPE_OBJECT_ParamPortConfig, id,
+			SPA_PARAM_PORT_CONFIG_direction, SPA_POD_Id(dir->direction),
+			SPA_PARAM_PORT_CONFIG_mode,      SPA_POD_CHOICE_ENUM_Id(4,
+				SPA_PARAM_PORT_CONFIG_MODE_none,
+				SPA_PARAM_PORT_CONFIG_MODE_none,
+				SPA_PARAM_PORT_CONFIG_MODE_dsp,
+				SPA_PARAM_PORT_CONFIG_MODE_convert),
+			SPA_PARAM_PORT_CONFIG_monitor,   SPA_POD_CHOICE_Bool(false),
+			SPA_PARAM_PORT_CONFIG_control,   SPA_POD_CHOICE_Bool(false));
+		break;
+	}
+	case SPA_PARAM_PortConfig:
+	{
+		struct dir *dir;
+		struct spa_pod_frame f[1];
+
+		switch (result.index) {
+		case 0:
+			dir = &this->dir[SPA_DIRECTION_INPUT];;
+			break;
+		case 1:
+			dir = &this->dir[SPA_DIRECTION_OUTPUT];;
+			break;
+		default:
+			return 0;
+		}
+		spa_pod_builder_push_object(&b, &f[0], SPA_TYPE_OBJECT_ParamPortConfig, id);
+		spa_pod_builder_add(&b,
+			SPA_PARAM_PORT_CONFIG_direction, SPA_POD_Id(dir->direction),
+			SPA_PARAM_PORT_CONFIG_mode,      SPA_POD_Id(dir->mode),
+			SPA_PARAM_PORT_CONFIG_monitor,   SPA_POD_Bool(this->monitor),
+			SPA_PARAM_PORT_CONFIG_control,   SPA_POD_Bool(dir->control),
+			0);
+
+		if (dir->have_format) {
+			spa_pod_builder_prop(&b, SPA_PARAM_PORT_CONFIG_format, 0);
+			spa_format_audio_raw_build(&b, SPA_PARAM_PORT_CONFIG_format,
+					&dir->format.info.raw);
+		}
+		param = spa_pod_builder_pop(&b, &f[0]);
+		break;
+	}
+	case SPA_PARAM_PropInfo:
+	{
+		struct props *p = &this->props;
+		struct spa_pod_frame f[2];
+
+		switch (result.index) {
+		case 0:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_id,   SPA_POD_Id(SPA_PROP_volume),
+				SPA_PROP_INFO_description, SPA_POD_String("Volume"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Float(p->volume, 0.0, 10.0));
+			break;
+		case 1:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_id,   SPA_POD_Id(SPA_PROP_mute),
+				SPA_PROP_INFO_description, SPA_POD_String("Mute"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(p->channel.mute));
+			break;
+		case 2:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_id,   SPA_POD_Id(SPA_PROP_channelVolumes),
+				SPA_PROP_INFO_description, SPA_POD_String("Channel Volumes"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Float(p->volume, 0.0, 10.0),
+				SPA_PROP_INFO_container, SPA_POD_Id(SPA_TYPE_Array));
+			break;
+		case 3:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_id,   SPA_POD_Id(SPA_PROP_channelMap),
+				SPA_PROP_INFO_description, SPA_POD_String("Channel Map"),
+				SPA_PROP_INFO_type, SPA_POD_Id(SPA_AUDIO_CHANNEL_UNKNOWN),
+				SPA_PROP_INFO_container, SPA_POD_Id(SPA_TYPE_Array));
+			break;
+		case 4:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_id,   SPA_POD_Id(SPA_PROP_monitorMute),
+				SPA_PROP_INFO_description, SPA_POD_String("Monitor Mute"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(p->monitor.mute));
+			break;
+		case 5:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_id,   SPA_POD_Id(SPA_PROP_monitorVolumes),
+				SPA_PROP_INFO_description, SPA_POD_String("Monitor Volumes"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Float(p->volume, 0.0, 10.0),
+				SPA_PROP_INFO_container, SPA_POD_Id(SPA_TYPE_Array));
+			break;
+		case 6:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_id,   SPA_POD_Id(SPA_PROP_softMute),
+				SPA_PROP_INFO_description, SPA_POD_String("Soft Mute"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(p->soft.mute));
+			break;
+		case 7:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_id,   SPA_POD_Id(SPA_PROP_softVolumes),
+				SPA_PROP_INFO_description, SPA_POD_String("Soft Volumes"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Float(p->volume, 0.0, 10.0),
+				SPA_PROP_INFO_container, SPA_POD_Id(SPA_TYPE_Array));
+			break;
+		case 8:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("monitor.channel-volumes"),
+				SPA_PROP_INFO_description, SPA_POD_String("Monitor channel volume"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(
+					this->monitor_channel_volumes),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 9:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("channelmix.disable"),
+				SPA_PROP_INFO_description, SPA_POD_String("Disable Channel mixing"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(p->mix_disabled),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 10:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("channelmix.normalize"),
+				SPA_PROP_INFO_description, SPA_POD_String("Normalize Volumes"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(
+					SPA_FLAG_IS_SET(this->mix.options, CHANNELMIX_OPTION_NORMALIZE)),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 11:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("channelmix.mix-lfe"),
+				SPA_PROP_INFO_description, SPA_POD_String("Mix LFE into channels"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(
+					SPA_FLAG_IS_SET(this->mix.options, CHANNELMIX_OPTION_MIX_LFE)),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 12:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("channelmix.upmix"),
+				SPA_PROP_INFO_description, SPA_POD_String("Enable upmixing"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(
+					SPA_FLAG_IS_SET(this->mix.options, CHANNELMIX_OPTION_UPMIX)),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 13:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("channelmix.lfe-cutoff"),
+				SPA_PROP_INFO_description, SPA_POD_String("LFE cutoff frequency"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Float(
+					this->mix.lfe_cutoff, 0.0, 1000.0),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 14:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("channelmix.fc-cutoff"),
+				SPA_PROP_INFO_description, SPA_POD_String("FC cutoff frequency (Hz)"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Float(
+					this->mix.fc_cutoff, 0.0, 48000.0),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 15:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("channelmix.rear-delay"),
+				SPA_PROP_INFO_description, SPA_POD_String("Rear channels delay (ms)"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Float(
+					this->mix.rear_delay, 0.0, 1000.0),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 16:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("channelmix.stereo-widen"),
+				SPA_PROP_INFO_description, SPA_POD_String("Stereo widen"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Float(
+					this->mix.widen, 0.0, 1.0),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 17:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("channelmix.hilbert-taps"),
+				SPA_PROP_INFO_description, SPA_POD_String("Taps for phase shift of rear"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Int(
+					this->mix.hilbert_taps, 0, MAX_TAPS),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 18:
+			spa_pod_builder_push_object(&b, &f[0], SPA_TYPE_OBJECT_PropInfo, id);
+			spa_pod_builder_add(&b,
+				SPA_PROP_INFO_name, SPA_POD_String("channelmix.upmix-method"),
+				SPA_PROP_INFO_description, SPA_POD_String("Upmix method to use"),
+				SPA_PROP_INFO_type, SPA_POD_String(
+					channelmix_upmix_info[this->mix.upmix].label),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true),
+				0);
+
+			spa_pod_builder_prop(&b, SPA_PROP_INFO_labels, 0);
+			spa_pod_builder_push_struct(&b, &f[1]);
+			SPA_FOR_EACH_ELEMENT_VAR(channelmix_upmix_info, i) {
+				spa_pod_builder_string(&b, i->label);
+				spa_pod_builder_string(&b, i->description);
+			}
+			spa_pod_builder_pop(&b, &f[1]);
+			param = spa_pod_builder_pop(&b, &f[0]);
+			break;
+		case 19:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_id, SPA_POD_Id(SPA_PROP_rate),
+				SPA_PROP_INFO_description, SPA_POD_String("Rate scaler"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Double(p->rate, 0.0, 10.0));
+			break;
+		case 20:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_id, SPA_POD_Id(SPA_PROP_quality),
+				SPA_PROP_INFO_name, SPA_POD_String("resample.quality"),
+				SPA_PROP_INFO_description, SPA_POD_String("Resample Quality"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Int(p->resample_quality, 0, 14),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 21:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("resample.disable"),
+				SPA_PROP_INFO_description, SPA_POD_String("Disable Resampling"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(p->resample_disabled),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 22:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_PropInfo, id,
+				SPA_PROP_INFO_name, SPA_POD_String("dither.noise"),
+				SPA_PROP_INFO_description, SPA_POD_String("Add noise bits"),
+				SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Int(this->dir[1].conv.noise_bits, 0, 16),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true));
+			break;
+		case 23:
+			spa_pod_builder_push_object(&b, &f[0], SPA_TYPE_OBJECT_PropInfo, id);
+			spa_pod_builder_add(&b,
+				SPA_PROP_INFO_name, SPA_POD_String("dither.method"),
+				SPA_PROP_INFO_description, SPA_POD_String("The dithering method"),
+				SPA_PROP_INFO_type, SPA_POD_String(
+					dither_method_info[this->dir[1].conv.method].label),
+				SPA_PROP_INFO_params, SPA_POD_Bool(true),
+				0);
+			spa_pod_builder_prop(&b, SPA_PROP_INFO_labels, 0);
+			spa_pod_builder_push_struct(&b, &f[1]);
+			SPA_FOR_EACH_ELEMENT_VAR(dither_method_info, i) {
+				spa_pod_builder_string(&b, i->label);
+				spa_pod_builder_string(&b, i->description);
+			}
+			spa_pod_builder_pop(&b, &f[1]);
+			param = spa_pod_builder_pop(&b, &f[0]);
+			break;
+		default:
+			return 0;
+		}
+		break;
+	}
+
+	case SPA_PARAM_Props:
+	{
+		struct props *p = &this->props;
+		struct spa_pod_frame f[2];
+
+		switch (result.index) {
+		case 0:
+			spa_pod_builder_push_object(&b, &f[0],
+                                SPA_TYPE_OBJECT_Props, id);
+			spa_pod_builder_add(&b,
+				SPA_PROP_volume,		SPA_POD_Float(p->volume),
+				SPA_PROP_mute,			SPA_POD_Bool(p->channel.mute),
+				SPA_PROP_channelVolumes,	SPA_POD_Array(sizeof(float),
+									SPA_TYPE_Float,
+									p->channel.n_volumes,
+									p->channel.volumes),
+				SPA_PROP_channelMap,		SPA_POD_Array(sizeof(uint32_t),
+									SPA_TYPE_Id,
+									p->n_channels,
+									p->channel_map),
+				SPA_PROP_softMute,		SPA_POD_Bool(p->soft.mute),
+				SPA_PROP_softVolumes,		SPA_POD_Array(sizeof(float),
+									SPA_TYPE_Float,
+									p->soft.n_volumes,
+									p->soft.volumes),
+				SPA_PROP_monitorMute,		SPA_POD_Bool(p->monitor.mute),
+				SPA_PROP_monitorVolumes,	SPA_POD_Array(sizeof(float),
+									SPA_TYPE_Float,
+									p->monitor.n_volumes,
+									p->monitor.volumes),
+				0);
+			spa_pod_builder_prop(&b, SPA_PROP_params, 0);
+			spa_pod_builder_push_struct(&b, &f[1]);
+			spa_pod_builder_string(&b, "monitor.channel-volumes");
+			spa_pod_builder_bool(&b, this->monitor_channel_volumes);
+			spa_pod_builder_string(&b, "channelmix.disable");
+			spa_pod_builder_bool(&b, this->props.mix_disabled);
+			spa_pod_builder_string(&b, "channelmix.normalize");
+			spa_pod_builder_bool(&b, SPA_FLAG_IS_SET(this->mix.options,
+						CHANNELMIX_OPTION_NORMALIZE));
+			spa_pod_builder_string(&b, "channelmix.mix-lfe");
+			spa_pod_builder_bool(&b, SPA_FLAG_IS_SET(this->mix.options,
+						CHANNELMIX_OPTION_MIX_LFE));
+			spa_pod_builder_string(&b, "channelmix.upmix");
+			spa_pod_builder_bool(&b, SPA_FLAG_IS_SET(this->mix.options,
+						CHANNELMIX_OPTION_UPMIX));
+			spa_pod_builder_string(&b, "channelmix.lfe-cutoff");
+			spa_pod_builder_float(&b, this->mix.lfe_cutoff);
+			spa_pod_builder_string(&b, "channelmix.fc-cutoff");
+			spa_pod_builder_float(&b, this->mix.fc_cutoff);
+			spa_pod_builder_string(&b, "channelmix.rear-delay");
+			spa_pod_builder_float(&b, this->mix.rear_delay);
+			spa_pod_builder_string(&b, "channelmix.stereo-widen");
+			spa_pod_builder_float(&b, this->mix.widen);
+			spa_pod_builder_string(&b, "channelmix.hilbert-taps");
+			spa_pod_builder_int(&b, this->mix.hilbert_taps);
+			spa_pod_builder_string(&b, "channelmix.upmix-method");
+			spa_pod_builder_string(&b, channelmix_upmix_info[this->mix.upmix].label);
+			spa_pod_builder_string(&b, "resample.quality");
+			spa_pod_builder_int(&b, p->resample_quality);
+			spa_pod_builder_string(&b, "resample.disable");
+			spa_pod_builder_bool(&b, p->resample_disabled);
+			spa_pod_builder_string(&b, "dither.noise");
+			spa_pod_builder_int(&b, this->dir[1].conv.noise_bits);
+			spa_pod_builder_string(&b, "dither.method");
+			spa_pod_builder_string(&b, dither_method_info[this->dir[1].conv.method].label);
+			spa_pod_builder_pop(&b, &f[1]);
+			param = spa_pod_builder_pop(&b, &f[0]);
+			break;
+		default:
+			return 0;
+		}
+		break;
+	}
+	default:
+		return 0;
+	}
+
+	if (spa_pod_filter(&b, &result.param, param, filter) < 0)
+		goto next;
+
+	spa_node_emit_result(&this->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result);
+
+	if (++count != num)
+		goto next;
+
+	return 0;
+}
+
+static int impl_node_set_io(void *object, uint32_t id, void *data, size_t size)
+{
+	struct impl *this = object;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_log_debug(this->log, "%p: io %d %p/%zd", this, id, data, size);
+
+	switch (id) {
+	case SPA_IO_Position:
+		this->io_position = data;
+		break;
+	default:
+		return -ENOENT;
+	}
+	return 0;
+}
+
+static int audioconvert_set_param(struct impl *this, const char *k, const char *s)
+{
+	if (spa_streq(k, "monitor.channel-volumes"))
+		this->monitor_channel_volumes = spa_atob(s);
+	else if (spa_streq(k, "channelmix.disable"))
+		this->props.mix_disabled = spa_atob(s);
+	else if (spa_streq(k, "channelmix.normalize"))
+		SPA_FLAG_UPDATE(this->mix.options, CHANNELMIX_OPTION_NORMALIZE, spa_atob(s));
+	else if (spa_streq(k, "channelmix.mix-lfe"))
+		SPA_FLAG_UPDATE(this->mix.options, CHANNELMIX_OPTION_MIX_LFE, spa_atob(s));
+	else if (spa_streq(k, "channelmix.upmix"))
+		SPA_FLAG_UPDATE(this->mix.options, CHANNELMIX_OPTION_UPMIX, spa_atob(s));
+	else if (spa_streq(k, "channelmix.lfe-cutoff"))
+		spa_atof(s, &this->mix.lfe_cutoff);
+	else if (spa_streq(k, "channelmix.fc-cutoff"))
+		spa_atof(s, &this->mix.fc_cutoff);
+	else if (spa_streq(k, "channelmix.rear-delay"))
+		spa_atof(s, &this->mix.rear_delay);
+	else if (spa_streq(k, "channelmix.stereo-widen"))
+		spa_atof(s, &this->mix.widen);
+	else if (spa_streq(k, "channelmix.hilbert-taps"))
+		spa_atou32(s, &this->mix.hilbert_taps, 0);
+	else if (spa_streq(k, "channelmix.upmix-method"))
+		this->mix.upmix = channelmix_upmix_from_label(s);
+	else if (spa_streq(k, "resample.quality"))
+		this->props.resample_quality = atoi(s);
+	else if (spa_streq(k, "resample.disable"))
+		this->props.resample_disabled = spa_atob(s);
+	else if (spa_streq(k, "dither.noise"))
+		spa_atou32(s, &this->dir[1].conv.noise_bits, 0);
+	else if (spa_streq(k, "dither.method"))
+		this->dir[1].conv.method = dither_method_from_label(s);
+	else
+		return 0;
+	return 1;
+}
+
+static int parse_prop_params(struct impl *this, struct spa_pod *params)
+{
+	struct spa_pod_parser prs;
+	struct spa_pod_frame f;
+	int changed = 0;
+
+	spa_pod_parser_pod(&prs, params);
+	if (spa_pod_parser_push_struct(&prs, &f) < 0)
+		return 0;
+
+	while (true) {
+		const char *name;
+		struct spa_pod *pod;
+		char value[512];
+
+		if (spa_pod_parser_get_string(&prs, &name) < 0)
+			break;
+
+		if (spa_pod_parser_get_pod(&prs, &pod) < 0)
+			break;
+
+		if (spa_pod_is_string(pod)) {
+			spa_pod_copy_string(pod, sizeof(value), value);
+		} else if (spa_pod_is_float(pod)) {
+			spa_dtoa(value, sizeof(value),
+					SPA_POD_VALUE(struct spa_pod_float, pod));
+		} else if (spa_pod_is_double(pod)) {
+			spa_dtoa(value, sizeof(value),
+					SPA_POD_VALUE(struct spa_pod_double, pod));
+		} else if (spa_pod_is_int(pod)) {
+			snprintf(value, sizeof(value), "%d",
+					SPA_POD_VALUE(struct spa_pod_int, pod));
+		} else if (spa_pod_is_bool(pod)) {
+			snprintf(value, sizeof(value), "%s",
+					SPA_POD_VALUE(struct spa_pod_bool, pod) ?
+					"true" : "false");
+		} else if (spa_pod_is_none(pod)) {
+			spa_zero(value);
+		} else
+			continue;
+
+		spa_log_info(this->log, "key:'%s' val:'%s'", name, value);
+		changed += audioconvert_set_param(this, name, value);
+	}
+	if (changed) {
+		channelmix_init(&this->mix);
+	}
+	return changed;
+}
+
+static int apply_props(struct impl *this, const struct spa_pod *param)
+{
+	struct spa_pod_prop *prop;
+	struct spa_pod_object *obj = (struct spa_pod_object *) param;
+	struct props *p = &this->props;
+	bool have_channel_volume = false;
+	bool have_soft_volume = false;
+	int changed = 0;
+	uint32_t n;
+
+	SPA_POD_OBJECT_FOREACH(obj, prop) {
+		switch (prop->key) {
+		case SPA_PROP_volume:
+			if (spa_pod_get_float(&prop->value, &p->volume) == 0)
+				changed++;
+			break;
+		case SPA_PROP_mute:
+			if (spa_pod_get_bool(&prop->value, &p->channel.mute) == 0) {
+				have_channel_volume = true;
+				changed++;
+			}
+			break;
+		case SPA_PROP_channelVolumes:
+			if ((n = spa_pod_copy_array(&prop->value, SPA_TYPE_Float,
+					p->channel.volumes, SPA_AUDIO_MAX_CHANNELS)) > 0) {
+				have_channel_volume = true;
+				p->channel.n_volumes = n;
+				changed++;
+			}
+			break;
+		case SPA_PROP_channelMap:
+			if ((n = spa_pod_copy_array(&prop->value, SPA_TYPE_Id,
+					p->channel_map, SPA_AUDIO_MAX_CHANNELS)) > 0) {
+				p->n_channels = n;
+				changed++;
+			}
+			break;
+		case SPA_PROP_softMute:
+			if (spa_pod_get_bool(&prop->value, &p->soft.mute) == 0) {
+				have_soft_volume = true;
+				changed++;
+			}
+			break;
+		case SPA_PROP_softVolumes:
+			if ((n = spa_pod_copy_array(&prop->value, SPA_TYPE_Float,
+					p->soft.volumes, SPA_AUDIO_MAX_CHANNELS)) > 0) {
+				have_soft_volume = true;
+				p->soft.n_volumes = n;
+				changed++;
+			}
+			break;
+		case SPA_PROP_monitorMute:
+			if (spa_pod_get_bool(&prop->value, &p->monitor.mute) == 0)
+				changed++;
+			break;
+		case SPA_PROP_monitorVolumes:
+			if ((n = spa_pod_copy_array(&prop->value, SPA_TYPE_Float,
+					p->monitor.volumes, SPA_AUDIO_MAX_CHANNELS)) > 0) {
+				p->monitor.n_volumes = n;
+				changed++;
+			}
+			break;
+		case SPA_PROP_rate:
+			spa_pod_get_double(&prop->value, &p->rate);
+			if (!this->rate_adjust && p->rate != 1.0) {
+				this->rate_adjust = true;
+				spa_log_info(this->log, "%p: activating adaptive resampler",
+						this);
+			}
+			break;
+		case SPA_PROP_params:
+			changed += parse_prop_params(this, &prop->value);
+			break;
+		default:
+			break;
+		}
+	}
+	if (changed) {
+		if (have_soft_volume)
+			p->have_soft_volume = true;
+		else if (have_channel_volume)
+			p->have_soft_volume = false;
+
+		set_volume(this);
+	}
+	return changed;
+}
+
+static int apply_midi(struct impl *this, const struct spa_pod *value)
+{
+	const uint8_t *val = SPA_POD_BODY(value);
+	uint32_t size = SPA_POD_BODY_SIZE(value);
+	struct props *p = &this->props;
+
+	if (size < 3)
+		return -EINVAL;
+
+	if ((val[0] & 0xf0) != 0xb0 || val[1] != 7)
+		return 0;
+
+	p->volume = val[2] / 127.0f;
+	set_volume(this);
+	return 1;
+}
+
+static int reconfigure_mode(struct impl *this, enum spa_param_port_config_mode mode,
+		enum spa_direction direction, bool monitor, bool control, struct spa_audio_info *info)
+{
+	struct dir *dir;
+	uint32_t i;
+
+	dir = &this->dir[direction];
+
+	if (dir->have_profile && this->monitor == monitor && dir->mode == mode &&
+	    dir->control == control &&
+	    (info == NULL || memcmp(&dir->format, info, sizeof(*info)) == 0))
+		return 0;
+
+	spa_log_info(this->log, "%p: port config direction:%d monitor:%d control:%d mode:%d %d", this,
+			direction, monitor, control, mode, dir->n_ports);
+
+	for (i = 0; i < dir->n_ports; i++) {
+		spa_node_emit_port_info(&this->hooks, direction, i, NULL);
+		if (this->monitor && direction == SPA_DIRECTION_INPUT)
+			spa_node_emit_port_info(&this->hooks, SPA_DIRECTION_OUTPUT, i+1, NULL);
+	}
+
+	this->monitor = monitor;
+	this->setup = false;
+	dir->control = control;
+	dir->have_profile = true;
+	dir->mode = mode;
+
+	switch (mode) {
+	case SPA_PARAM_PORT_CONFIG_MODE_dsp:
+	{
+		if (info) {
+			dir->n_ports = info->info.raw.channels;
+			dir->format = *info;
+			dir->format.info.raw.format = SPA_AUDIO_FORMAT_DSP_F32;
+			dir->format.info.raw.rate = 0;
+			dir->have_format = true;
+		} else {
+			dir->n_ports = 0;
+		}
+
+		if (this->monitor && direction == SPA_DIRECTION_INPUT)
+			this->dir[SPA_DIRECTION_OUTPUT].n_ports = dir->n_ports + 1;
+
+		for (i = 0; i < dir->n_ports; i++) {
+			init_port(this, direction, i, info->info.raw.position[i], true, false, false);
+			if (this->monitor && direction == SPA_DIRECTION_INPUT)
+				init_port(this, SPA_DIRECTION_OUTPUT, i+1,
+					info->info.raw.position[i], true, true, false);
+		}
+		break;
+	}
+	case SPA_PARAM_PORT_CONFIG_MODE_convert:
+	{
+		dir->n_ports = 1;
+		dir->have_format = false;
+		init_port(this, direction, 0, 0, false, false, false);
+		break;
+	}
+	case SPA_PARAM_PORT_CONFIG_MODE_none:
+		break;
+	default:
+		return -ENOTSUP;
+	}
+	if (direction == SPA_DIRECTION_INPUT && dir->control) {
+		i = dir->n_ports++;
+		init_port(this, direction, i, 0, false, false, true);
+	}
+
+	this->info.change_mask |= SPA_NODE_CHANGE_MASK_FLAGS | SPA_NODE_CHANGE_MASK_PARAMS;
+	this->info.flags &= ~SPA_NODE_FLAG_NEED_CONFIGURE;
+	this->params[IDX_Props].user++;
+	this->params[IDX_PortConfig].user++;
+	return 0;
+}
+
+static int impl_node_set_param(void *object, uint32_t id, uint32_t flags,
+			       const struct spa_pod *param)
+{
+	struct impl *this = object;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	if (param == NULL)
+		return 0;
+
+	switch (id) {
+	case SPA_PARAM_PortConfig:
+	{
+		struct spa_audio_info info = { 0, }, *infop = NULL;
+		struct spa_pod *format = NULL;
+		enum spa_direction direction;
+		enum spa_param_port_config_mode mode;
+		bool monitor = false, control = false;
+		int res;
+
+		if (spa_pod_parse_object(param,
+				SPA_TYPE_OBJECT_ParamPortConfig, NULL,
+				SPA_PARAM_PORT_CONFIG_direction,	SPA_POD_Id(&direction),
+				SPA_PARAM_PORT_CONFIG_mode,		SPA_POD_Id(&mode),
+				SPA_PARAM_PORT_CONFIG_monitor,		SPA_POD_OPT_Bool(&monitor),
+				SPA_PARAM_PORT_CONFIG_control,		SPA_POD_OPT_Bool(&control),
+				SPA_PARAM_PORT_CONFIG_format,		SPA_POD_OPT_Pod(&format)) < 0)
+			return -EINVAL;
+
+		if (format) {
+			if (!spa_pod_is_object_type(format, SPA_TYPE_OBJECT_Format))
+				return -EINVAL;
+
+			if ((res = spa_format_parse(format, &info.media_type, &info.media_subtype)) < 0)
+				return res;
+
+			if (info.media_type != SPA_MEDIA_TYPE_audio ||
+			    info.media_subtype != SPA_MEDIA_SUBTYPE_raw)
+				return -EINVAL;
+
+			if (spa_format_audio_raw_parse(format, &info.info.raw) < 0)
+				return -EINVAL;
+
+			if (info.info.raw.format == 0 ||
+			    info.info.raw.rate == 0 ||
+			    info.info.raw.channels == 0 ||
+			    info.info.raw.channels > SPA_AUDIO_MAX_CHANNELS)
+				return -EINVAL;
+
+			infop = &info;
+		}
+
+		if ((res = reconfigure_mode(this, mode, direction, monitor, control, infop)) < 0)
+			return res;
+
+		emit_node_info(this, false);
+		break;
+	}
+	case SPA_PARAM_Props:
+		if (apply_props(this, param) > 0)
+			emit_node_info(this, false);
+		break;
+	default:
+		return -ENOENT;
+	}
+	return 0;
+}
+
+static int int32_cmp(const void *v1, const void *v2)
+{
+	int32_t a1 = *(int32_t*)v1;
+	int32_t a2 = *(int32_t*)v2;
+	if (a1 == 0 && a2 != 0)
+		return 1;
+	if (a2 == 0 && a1 != 0)
+		return -1;
+	return a1 - a2;
+}
+
+static int setup_in_convert(struct impl *this)
+{
+	uint32_t i, j;
+	struct dir *in = &this->dir[SPA_DIRECTION_INPUT];
+	struct spa_audio_info src_info, dst_info;
+	int res;
+	bool remap = false;
+
+	src_info = in->format;
+	dst_info = src_info;
+	dst_info.info.raw.format = SPA_AUDIO_FORMAT_DSP_F32;
+
+	spa_log_info(this->log, "%p: %s/%d@%d->%s/%d@%d", this,
+			spa_debug_type_find_name(spa_type_audio_format, src_info.info.raw.format),
+			src_info.info.raw.channels,
+			src_info.info.raw.rate,
+			spa_debug_type_find_name(spa_type_audio_format, dst_info.info.raw.format),
+			dst_info.info.raw.channels,
+			dst_info.info.raw.rate);
+
+	qsort(dst_info.info.raw.position, dst_info.info.raw.channels,
+					sizeof(uint32_t), int32_cmp);
+
+	for (i = 0; i < src_info.info.raw.channels; i++) {
+		for (j = 0; j < dst_info.info.raw.channels; j++) {
+			if (src_info.info.raw.position[i] !=
+			    dst_info.info.raw.position[j])
+				continue;
+			in->remap[i] = j;
+			if (i != j)
+				remap = true;
+			spa_log_debug(this->log, "%p: channel %d (%d) -> %d (%s -> %s)", this,
+					i, in->remap[i], j,
+					spa_debug_type_find_short_name(spa_type_audio_channel,
+						src_info.info.raw.position[i]),
+					spa_debug_type_find_short_name(spa_type_audio_channel,
+						dst_info.info.raw.position[j]));
+			dst_info.info.raw.position[j] = -1;
+			break;
+		}
+	}
+	if (in->conv.free)
+		convert_free(&in->conv);
+
+	in->conv.src_fmt = src_info.info.raw.format;
+	in->conv.dst_fmt = dst_info.info.raw.format;
+	in->conv.n_channels = dst_info.info.raw.channels;
+	in->conv.cpu_flags = this->cpu_flags;
+	in->need_remap = remap;
+
+	if ((res = convert_init(&in->conv)) < 0)
+		return res;
+
+	spa_log_debug(this->log, "%p: got converter features %08x:%08x passthrough:%d remap:%d %s", this,
+			this->cpu_flags, in->conv.cpu_flags, in->conv.is_passthrough,
+			remap, in->conv.func_name);
+
+	return 0;
+}
+
+static void fix_volumes(struct impl *this, struct volumes *vols, uint32_t channels)
+{
+	float s;
+	uint32_t i;
+	spa_log_debug(this->log, "%p %d -> %d", this, vols->n_volumes, channels);
+	if (vols->n_volumes > 0) {
+		s = 0.0f;
+		for (i = 0; i < vols->n_volumes; i++)
+			s += vols->volumes[i];
+		s /= vols->n_volumes;
+	} else {
+		s = 1.0f;
+	}
+	vols->n_volumes = channels;
+	for (i = 0; i < vols->n_volumes; i++)
+		vols->volumes[i] = s;
+}
+
+static int remap_volumes(struct impl *this, const struct spa_audio_info *info)
+{
+	struct props *p = &this->props;
+	uint32_t i, j, target = info->info.raw.channels;
+
+	for (i = 0; i < p->n_channels; i++) {
+		for (j = i; j < target; j++) {
+			spa_log_debug(this->log, "%d %d: %d <-> %d", i, j,
+					p->channel_map[i], info->info.raw.position[j]);
+			if (p->channel_map[i] != info->info.raw.position[j])
+				continue;
+			if (i != j) {
+				SPA_SWAP(p->channel_map[i], p->channel_map[j]);
+				SPA_SWAP(p->channel.volumes[i], p->channel.volumes[j]);
+				SPA_SWAP(p->soft.volumes[i], p->soft.volumes[j]);
+				SPA_SWAP(p->monitor.volumes[i], p->monitor.volumes[j]);
+			}
+			break;
+		}
+	}
+	p->n_channels = target;
+	for (i = 0; i < p->n_channels; i++)
+		p->channel_map[i] = info->info.raw.position[i];
+
+	if (target == 0)
+		return 0;
+	if (p->channel.n_volumes != target)
+		fix_volumes(this, &p->channel, target);
+	if (p->soft.n_volumes != target)
+		fix_volumes(this, &p->soft, target);
+	if (p->monitor.n_volumes != target)
+		fix_volumes(this, &p->monitor, target);
+
+	return 1;
+}
+
+static void set_volume(struct impl *this)
+{
+	struct volumes *vol;
+	uint32_t i;
+	float volumes[SPA_AUDIO_MAX_CHANNELS];
+	struct dir *dir = &this->dir[this->direction];
+
+	spa_log_debug(this->log, "%p have_format:%d", this, dir->have_format);
+
+	if (dir->have_format)
+		remap_volumes(this, &dir->format);
+
+	if (this->mix.set_volume == NULL)
+		return;
+
+	if (this->props.have_soft_volume)
+		vol = &this->props.soft;
+	else
+		vol = &this->props.channel;
+
+	for (i = 0; i < vol->n_volumes; i++)
+		volumes[i] = vol->volumes[dir->remap[i]];
+
+	channelmix_set_volume(&this->mix, this->props.volume, vol->mute,
+			vol->n_volumes, volumes);
+
+	this->info.change_mask |= SPA_NODE_CHANGE_MASK_PARAMS;
+	this->params[IDX_Props].user++;
+}
+
+static char *format_position(char *str, size_t len, uint32_t channels, uint32_t *position)
+{
+	uint32_t i, idx = 0;
+	for (i = 0; i < channels; i++)
+		idx += snprintf(str + idx, len - idx, "%s%s", i == 0 ? "" : " ",
+				spa_debug_type_find_short_name(spa_type_audio_channel,
+					position[i]));
+	return str;
+}
+
+static int setup_channelmix(struct impl *this)
+{
+	struct dir *in = &this->dir[SPA_DIRECTION_INPUT];
+	struct dir *out = &this->dir[SPA_DIRECTION_OUTPUT];
+	uint32_t i, src_chan, dst_chan, p;
+	uint64_t src_mask, dst_mask;
+	char str[1024];
+	int res;
+
+	src_chan = in->format.info.raw.channels;
+	dst_chan = out->format.info.raw.channels;
+
+	for (i = 0, src_mask = 0; i < src_chan; i++) {
+		p = in->format.info.raw.position[i];
+		src_mask |= 1ULL << (p < 64 ? p : 0);
+	}
+	for (i = 0, dst_mask = 0; i < dst_chan; i++) {
+		p = out->format.info.raw.position[i];
+		dst_mask |= 1ULL << (p < 64 ? p : 0);
+	}
+
+	spa_log_info(this->log, "in  %s (%016"PRIx64")", format_position(str, sizeof(str),
+				src_chan, in->format.info.raw.position), src_mask);
+	spa_log_info(this->log, "out %s (%016"PRIx64")", format_position(str, sizeof(str),
+				dst_chan, out->format.info.raw.position), dst_mask);
+
+	spa_log_info(this->log, "%p: %s/%d@%d->%s/%d@%d %08"PRIx64":%08"PRIx64, this,
+			spa_debug_type_find_name(spa_type_audio_format, SPA_AUDIO_FORMAT_DSP_F32),
+			src_chan,
+			in->format.info.raw.rate,
+			spa_debug_type_find_name(spa_type_audio_format, SPA_AUDIO_FORMAT_DSP_F32),
+			dst_chan,
+			in->format.info.raw.rate,
+			src_mask, dst_mask);
+
+	this->mix.src_chan = src_chan;
+	this->mix.src_mask = src_mask;
+	this->mix.dst_chan = dst_chan;
+	this->mix.dst_mask = dst_mask;
+	this->mix.cpu_flags = this->cpu_flags;
+	this->mix.log = this->log;
+	this->mix.freq = in->format.info.raw.rate;
+
+	if ((res = channelmix_init(&this->mix)) < 0)
+		return res;
+
+	set_volume(this);
+
+	spa_log_debug(this->log, "%p: got channelmix features %08x:%08x flags:%08x %s",
+			this, this->cpu_flags, this->mix.cpu_flags,
+			this->mix.flags, this->mix.func_name);
+	return 0;
+}
+
+static int setup_resample(struct impl *this)
+{
+	struct dir *in = &this->dir[SPA_DIRECTION_INPUT];
+	struct dir *out = &this->dir[SPA_DIRECTION_OUTPUT];
+	int res;
+
+	spa_log_info(this->log, "%p: %s/%d@%d->%s/%d@%d", this,
+			spa_debug_type_find_name(spa_type_audio_format, SPA_AUDIO_FORMAT_DSP_F32),
+			out->format.info.raw.channels,
+			in->format.info.raw.rate,
+			spa_debug_type_find_name(spa_type_audio_format, SPA_AUDIO_FORMAT_DSP_F32),
+			out->format.info.raw.channels,
+			out->format.info.raw.rate);
+
+	if (this->resample.free)
+		resample_free(&this->resample);
+
+	this->resample.channels = out->format.info.raw.channels;
+	this->resample.i_rate = in->format.info.raw.rate;
+	this->resample.o_rate = out->format.info.raw.rate;
+	this->resample.log = this->log;
+	this->resample.quality = this->props.resample_quality;
+	this->resample.cpu_flags = this->cpu_flags;
+
+	this->rate_adjust = this->props.rate != 1.0;
+
+	if (this->resample_peaks)
+		res = resample_peaks_init(&this->resample);
+	else
+		res = resample_native_init(&this->resample);
+
+	spa_log_debug(this->log, "%p: got resample features %08x:%08x %s",
+			this, this->cpu_flags, this->resample.cpu_flags,
+			this->resample.func_name);
+	return res;
+}
+
+static int calc_width(struct spa_audio_info *info)
+{
+	switch (info->info.raw.format) {
+	case SPA_AUDIO_FORMAT_U8:
+	case SPA_AUDIO_FORMAT_U8P:
+	case SPA_AUDIO_FORMAT_S8:
+	case SPA_AUDIO_FORMAT_S8P:
+	case SPA_AUDIO_FORMAT_ULAW:
+	case SPA_AUDIO_FORMAT_ALAW:
+		return 1;
+	case SPA_AUDIO_FORMAT_S16P:
+	case SPA_AUDIO_FORMAT_S16:
+	case SPA_AUDIO_FORMAT_S16_OE:
+		return 2;
+	case SPA_AUDIO_FORMAT_S24P:
+	case SPA_AUDIO_FORMAT_S24:
+	case SPA_AUDIO_FORMAT_S24_OE:
+		return 3;
+	case SPA_AUDIO_FORMAT_F64P:
+	case SPA_AUDIO_FORMAT_F64:
+	case SPA_AUDIO_FORMAT_F64_OE:
+		return 8;
+	default:
+		return 4;
+	}
+}
+
+static int setup_out_convert(struct impl *this)
+{
+	uint32_t i, j;
+	struct dir *out = &this->dir[SPA_DIRECTION_OUTPUT];
+	struct spa_audio_info src_info, dst_info;
+	int res;
+	bool remap = false;
+
+	dst_info = out->format;
+	src_info = dst_info;
+	src_info.info.raw.format = SPA_AUDIO_FORMAT_DSP_F32;
+
+	spa_log_info(this->log, "%p: %s/%d@%d->%s/%d@%d", this,
+			spa_debug_type_find_name(spa_type_audio_format, src_info.info.raw.format),
+			src_info.info.raw.channels,
+			src_info.info.raw.rate,
+			spa_debug_type_find_name(spa_type_audio_format, dst_info.info.raw.format),
+			dst_info.info.raw.channels,
+			dst_info.info.raw.rate);
+
+	qsort(src_info.info.raw.position, src_info.info.raw.channels,
+					sizeof(uint32_t), int32_cmp);
+
+	for (i = 0; i < src_info.info.raw.channels; i++) {
+		for (j = 0; j < dst_info.info.raw.channels; j++) {
+			if (src_info.info.raw.position[i] !=
+			    dst_info.info.raw.position[j])
+				continue;
+			out->remap[i] = j;
+			if (i != j)
+				remap = true;
+
+			spa_log_debug(this->log, "%p: channel %d (%d) -> %d (%s -> %s)", this,
+					i, out->remap[i], j,
+					spa_debug_type_find_short_name(spa_type_audio_channel,
+						src_info.info.raw.position[i]),
+					spa_debug_type_find_short_name(spa_type_audio_channel,
+						dst_info.info.raw.position[j]));
+			dst_info.info.raw.position[j] = -1;
+			break;
+		}
+	}
+	if (out->conv.free)
+		convert_free(&out->conv);
+
+	out->conv.src_fmt = src_info.info.raw.format;
+	out->conv.dst_fmt = dst_info.info.raw.format;
+	out->conv.rate = dst_info.info.raw.rate;
+	out->conv.n_channels = dst_info.info.raw.channels;
+	out->conv.cpu_flags = this->cpu_flags;
+	out->need_remap = remap;
+
+	if ((res = convert_init(&out->conv)) < 0)
+		return res;
+
+	spa_log_debug(this->log, "%p: got converter features %08x:%08x quant:%d:%d"
+			" passthrough:%d remap:%d %s", this,
+			this->cpu_flags, out->conv.cpu_flags, out->conv.method,
+			out->conv.noise_bits, out->conv.is_passthrough, remap, out->conv.func_name);
+
+	return 0;
+}
+
+static int setup_convert(struct impl *this)
+{
+	struct dir *in, *out;
+	uint32_t i, rate;
+	int res;
+
+	in = &this->dir[SPA_DIRECTION_INPUT];
+	out = &this->dir[SPA_DIRECTION_OUTPUT];
+
+	spa_log_debug(this->log, "%p: setup:%d in_format:%d out_format:%d", this,
+			this->setup, in->have_format, out->have_format);
+
+	if (this->setup)
+		return 0;
+
+	if (!in->have_format || !out->have_format)
+		return -EINVAL;
+
+	rate = this->io_position ?  this->io_position->clock.rate.denom : DEFAULT_RATE;
+
+	/* in DSP mode we always convert to the DSP rate */
+	if (in->mode == SPA_PARAM_PORT_CONFIG_MODE_dsp)
+		in->format.info.raw.rate = rate;
+	if (out->mode == SPA_PARAM_PORT_CONFIG_MODE_dsp)
+		out->format.info.raw.rate = rate;
+
+	/* try to passthrough the rates */
+	if (in->format.info.raw.rate == 0)
+		in->format.info.raw.rate = out->format.info.raw.rate;
+	else if (out->format.info.raw.rate == 0)
+		out->format.info.raw.rate = in->format.info.raw.rate;
+
+	/* try to passthrough the channels */
+	if (in->format.info.raw.channels == 0)
+		in->format.info.raw.channels = out->format.info.raw.channels;
+	else if (out->format.info.raw.channels == 0)
+		out->format.info.raw.channels = in->format.info.raw.channels;
+
+	if (in->format.info.raw.rate == 0 || out->format.info.raw.rate == 0)
+		return -EINVAL;
+	if (in->format.info.raw.channels == 0 || out->format.info.raw.channels == 0)
+		return -EINVAL;
+
+	if ((res = setup_in_convert(this)) < 0)
+		return res;
+	if ((res = setup_channelmix(this)) < 0)
+		return res;
+	if ((res = setup_resample(this)) < 0)
+		return res;
+	if ((res = setup_out_convert(this)) < 0)
+		return res;
+
+	for (i = 0; i < MAX_PORTS; i++) {
+		this->tmp_datas[0][i] = SPA_PTROFF(this->tmp[0], this->empty_size * i, void);
+		this->tmp_datas[0][i] = SPA_PTR_ALIGN(this->tmp_datas[0][i], MAX_ALIGN, void);
+		this->tmp_datas[1][i] = SPA_PTROFF(this->tmp[1], this->empty_size * i, void);
+		this->tmp_datas[1][i] = SPA_PTR_ALIGN(this->tmp_datas[1][i], MAX_ALIGN, void);
+	}
+	this->setup = true;
+
+	emit_node_info(this, false);
+
+	return 0;
+}
+
+static void reset_node(struct impl *this)
+{
+	if (this->resample.reset)
+		resample_reset(&this->resample);
+	this->in_offset = 0;
+	this->out_offset = 0;
+}
+
+static int impl_node_send_command(void *object, const struct spa_command *command)
+{
+	struct impl *this = object;
+	int res;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(command != NULL, -EINVAL);
+
+	switch (SPA_NODE_COMMAND_ID(command)) {
+	case SPA_NODE_COMMAND_Start:
+		if (this->started)
+			return 0;
+		if ((res = setup_convert(this)) < 0)
+			return res;
+		this->started = true;
+		break;
+	case SPA_NODE_COMMAND_Suspend:
+		this->setup = false;
+		SPA_FALLTHROUGH;
+	case SPA_NODE_COMMAND_Pause:
+		this->started = false;
+		break;
+	case SPA_NODE_COMMAND_Flush:
+		reset_node(this);
+		break;
+	default:
+		return -ENOTSUP;
+	}
+	return 0;
+}
+
+static int
+impl_node_add_listener(void *object,
+		struct spa_hook *listener,
+		const struct spa_node_events *events,
+		void *data)
+{
+	struct impl *this = object;
+	uint32_t i;
+	struct spa_hook_list save;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_log_trace(this->log, "%p: add listener %p", this, listener);
+	spa_hook_list_isolate(&this->hooks, &save, listener, events, data);
+
+	emit_node_info(this, true);
+	for (i = 0; i < this->dir[SPA_DIRECTION_INPUT].n_ports; i++) {
+		emit_port_info(this, GET_IN_PORT(this, i), true);
+	}
+	for (i = 0; i < this->dir[SPA_DIRECTION_OUTPUT].n_ports; i++) {
+		emit_port_info(this, GET_OUT_PORT(this, i), true);
+	}
+	spa_hook_list_join(&this->hooks, &save);
+
+	return 0;
+}
+
+static int
+impl_node_set_callbacks(void *object,
+			const struct spa_node_callbacks *callbacks,
+			void *user_data)
+{
+	return 0;
+}
+
+static int impl_node_add_port(void *object, enum spa_direction direction, uint32_t port_id,
+		const struct spa_dict *props)
+{
+	return -ENOTSUP;
+}
+
+static int
+impl_node_remove_port(void *object, enum spa_direction direction, uint32_t port_id)
+{
+	return -ENOTSUP;
+}
+
+static int port_enum_formats(void *object,
+			     enum spa_direction direction, uint32_t port_id,
+			     uint32_t index,
+			     struct spa_pod **param,
+			     struct spa_pod_builder *builder)
+{
+	struct impl *this = object;
+
+	switch (index) {
+	case 0:
+		if (PORT_IS_DSP(this, direction, port_id)) {
+			struct spa_audio_info_dsp info;
+			info.format = SPA_AUDIO_FORMAT_DSP_F32;
+			*param = spa_format_audio_dsp_build(builder,
+				SPA_PARAM_EnumFormat, &info);
+		} else if (PORT_IS_CONTROL(this, direction, port_id)) {
+			*param = spa_pod_builder_add_object(builder,
+				SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat,
+				SPA_FORMAT_mediaType,      SPA_POD_Id(SPA_MEDIA_TYPE_application),
+				SPA_FORMAT_mediaSubtype,   SPA_POD_Id(SPA_MEDIA_SUBTYPE_control));
+		} else {
+			uint32_t rate = this->io_position ?
+				this->io_position->clock.rate.denom : DEFAULT_RATE;
+
+			*param = spa_pod_builder_add_object(builder,
+				SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat,
+				SPA_FORMAT_mediaType,      SPA_POD_Id(SPA_MEDIA_TYPE_audio),
+				SPA_FORMAT_mediaSubtype,   SPA_POD_Id(SPA_MEDIA_SUBTYPE_raw),
+				SPA_FORMAT_AUDIO_format,   SPA_POD_CHOICE_ENUM_Id(25,
+							SPA_AUDIO_FORMAT_F32P,
+							SPA_AUDIO_FORMAT_F32P,
+							SPA_AUDIO_FORMAT_F32,
+							SPA_AUDIO_FORMAT_F32_OE,
+							SPA_AUDIO_FORMAT_F64P,
+							SPA_AUDIO_FORMAT_F64,
+							SPA_AUDIO_FORMAT_F64_OE,
+							SPA_AUDIO_FORMAT_S32P,
+							SPA_AUDIO_FORMAT_S32,
+							SPA_AUDIO_FORMAT_S32_OE,
+							SPA_AUDIO_FORMAT_S24_32P,
+							SPA_AUDIO_FORMAT_S24_32,
+							SPA_AUDIO_FORMAT_S24_32_OE,
+							SPA_AUDIO_FORMAT_S24P,
+							SPA_AUDIO_FORMAT_S24,
+							SPA_AUDIO_FORMAT_S24_OE,
+							SPA_AUDIO_FORMAT_S16P,
+							SPA_AUDIO_FORMAT_S16,
+							SPA_AUDIO_FORMAT_S16_OE,
+							SPA_AUDIO_FORMAT_S8P,
+							SPA_AUDIO_FORMAT_S8,
+							SPA_AUDIO_FORMAT_U8P,
+							SPA_AUDIO_FORMAT_U8,
+							SPA_AUDIO_FORMAT_ULAW,
+							SPA_AUDIO_FORMAT_ALAW),
+				SPA_FORMAT_AUDIO_rate,     SPA_POD_CHOICE_RANGE_Int(
+					rate, 1, INT32_MAX),
+				SPA_FORMAT_AUDIO_channels, SPA_POD_CHOICE_RANGE_Int(
+					DEFAULT_CHANNELS, 1, SPA_AUDIO_MAX_CHANNELS));
+		}
+		break;
+	default:
+		return 0;
+	}
+	return 1;
+}
+
+static int
+impl_node_port_enum_params(void *object, int seq,
+			   enum spa_direction direction, uint32_t port_id,
+			   uint32_t id, uint32_t start, uint32_t num,
+			   const struct spa_pod *filter)
+{
+	struct impl *this = object;
+	struct port *port;
+	struct spa_pod *param;
+	struct spa_pod_builder b = { 0 };
+	uint8_t buffer[2048];
+	struct spa_result_node_params result;
+	uint32_t count = 0;
+	int res;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(num != 0, -EINVAL);
+
+	spa_log_debug(this->log, "%p: enum params port %d.%d %d %u",
+			this, direction, port_id, seq, id);
+
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	port = GET_PORT(this, direction, port_id);
+
+	result.id = id;
+	result.next = start;
+      next:
+	result.index = result.next++;
+
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+
+	switch (id) {
+	case SPA_PARAM_EnumFormat:
+		if ((res = port_enum_formats(object, direction, port_id, result.index, &param, &b)) <= 0)
+			return res;
+		break;
+	case SPA_PARAM_Format:
+		if (!port->have_format)
+			return -EIO;
+		if (result.index > 0)
+			return 0;
+
+		if (PORT_IS_DSP(this, direction, port_id))
+			param = spa_format_audio_dsp_build(&b, id, &port->format.info.dsp);
+		else if (PORT_IS_CONTROL(this, direction, port_id))
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_Format,  id,
+				SPA_FORMAT_mediaType,    SPA_POD_Id(SPA_MEDIA_TYPE_application),
+				SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_control));
+		else
+			param = spa_format_audio_raw_build(&b, id, &port->format.info.raw);
+		break;
+	case SPA_PARAM_Buffers:
+	{
+		uint32_t size;
+
+		if (!port->have_format)
+			return -EIO;
+		if (result.index > 0)
+			return 0;
+
+		if (PORT_IS_DSP(this, direction, port_id)) {
+			/* DSP ports always use the quantum_limit as the buffer
+			 * size. */
+			size = this->quantum_limit;
+		} else {
+			uint32_t irate, orate;
+			struct dir *dir = &this->dir[direction];
+
+			/* Convert ports are scaled so that they can always
+			 * provide one quantum of data */
+			irate = dir->format.info.raw.rate;
+
+			/* collect the other port rate */
+			dir = &this->dir[SPA_DIRECTION_REVERSE(direction)];
+			if (dir->mode == SPA_PARAM_PORT_CONFIG_MODE_dsp)
+				orate = this->io_position ?  this->io_position->clock.rate.denom : DEFAULT_RATE;
+			else
+				orate = dir->format.info.raw.rate;
+
+			/* always keep some extra room for adaptive resampling */
+			size = this->quantum_limit * 2;
+			/*  scale the buffer size when we can. */
+			if (irate != 0 && orate != 0)
+				size = SPA_SCALE32_UP(size, irate, orate);
+		}
+
+		param = spa_pod_builder_add_object(&b,
+			SPA_TYPE_OBJECT_ParamBuffers, id,
+			SPA_PARAM_BUFFERS_buffers, SPA_POD_CHOICE_RANGE_Int(2, 1, MAX_BUFFERS),
+			SPA_PARAM_BUFFERS_blocks,  SPA_POD_Int(port->blocks),
+			SPA_PARAM_BUFFERS_size,    SPA_POD_CHOICE_RANGE_Int(
+								size * port->stride,
+								16 * port->stride,
+								INT32_MAX),
+			SPA_PARAM_BUFFERS_stride,  SPA_POD_Int(port->stride));
+		break;
+	}
+	case SPA_PARAM_Meta:
+		switch (result.index) {
+		case 0:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_ParamMeta, id,
+				SPA_PARAM_META_type, SPA_POD_Id(SPA_META_Header),
+				SPA_PARAM_META_size, SPA_POD_Int(sizeof(struct spa_meta_header)));
+			break;
+		default:
+			return 0;
+		}
+		break;
+	case SPA_PARAM_IO:
+		switch (result.index) {
+		case 0:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_ParamIO, id,
+				SPA_PARAM_IO_id,   SPA_POD_Id(SPA_IO_Buffers),
+				SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_buffers)));
+			break;
+		default:
+			return 0;
+		}
+		break;
+	case SPA_PARAM_Latency:
+		switch (result.index) {
+		case 0: case 1:
+			param = spa_latency_build(&b, id, &this->dir[result.index].latency);
+			break;
+		default:
+			return 0;
+		}
+		break;
+	default:
+		return -ENOENT;
+	}
+
+	if (spa_pod_filter(&b, &result.param, param, filter) < 0)
+		goto next;
+
+	spa_node_emit_result(&this->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result);
+
+	if (++count != num)
+		goto next;
+
+	return 0;
+}
+
+static int clear_buffers(struct impl *this, struct port *port)
+{
+	if (port->n_buffers > 0) {
+		spa_log_debug(this->log, "%p: clear buffers %p", this, port);
+		port->n_buffers = 0;
+		spa_list_init(&port->queue);
+	}
+	return 0;
+}
+
+static int port_set_latency(void *object,
+			   enum spa_direction direction,
+			   uint32_t port_id,
+			   uint32_t flags,
+			   const struct spa_pod *latency)
+{
+	struct impl *this = object;
+	struct port *port, *oport;
+	enum spa_direction other = SPA_DIRECTION_REVERSE(direction);
+	uint32_t i;
+
+	spa_log_debug(this->log, "%p: set latency direction:%d id:%d",
+			this, direction, port_id);
+
+	port = GET_PORT(this, direction, port_id);
+	if (port->is_monitor)
+		return 0;
+
+	if (latency == NULL) {
+		this->dir[other].latency = SPA_LATENCY_INFO(other);
+	} else {
+		struct spa_latency_info info;
+		if (spa_latency_parse(latency, &info) < 0 ||
+		    info.direction != other)
+			return -EINVAL;
+		this->dir[other].latency = info;
+	}
+
+	for (i = 0; i < this->dir[other].n_ports; i++) {
+		oport = GET_PORT(this, other, i);
+		oport->info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
+		oport->params[IDX_Latency].user++;
+		emit_port_info(this, oport, false);
+	}
+	port->info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
+	port->params[IDX_Latency].user++;
+	emit_port_info(this, port, false);
+	return 0;
+}
+
+static int port_set_format(void *object,
+			   enum spa_direction direction,
+			   uint32_t port_id,
+			   uint32_t flags,
+			   const struct spa_pod *format)
+{
+	struct impl *this = object;
+	struct port *port;
+	int res;
+
+	port = GET_PORT(this, direction, port_id);
+
+	spa_log_debug(this->log, "%p: set format", this);
+
+	if (format == NULL) {
+		port->have_format = false;
+		clear_buffers(this, port);
+	} else {
+		struct spa_audio_info info = { 0 };
+
+		if ((res = spa_format_parse(format, &info.media_type, &info.media_subtype)) < 0) {
+			spa_log_error(this->log, "can't parse format %s", spa_strerror(res));
+			return res;
+		}
+		if (PORT_IS_DSP(this, direction, port_id)) {
+			if (info.media_type != SPA_MEDIA_TYPE_audio ||
+			    info.media_subtype != SPA_MEDIA_SUBTYPE_dsp) {
+				spa_log_error(this->log, "unexpected types %d/%d",
+						info.media_type, info.media_subtype);
+				return -EINVAL;
+			}
+			if ((res = spa_format_audio_dsp_parse(format, &info.info.dsp)) < 0) {
+				spa_log_error(this->log, "can't parse format %s", spa_strerror(res));
+				return res;
+			}
+			if (info.info.dsp.format != SPA_AUDIO_FORMAT_DSP_F32) {
+				spa_log_error(this->log, "unexpected format %d<->%d",
+					info.info.dsp.format, SPA_AUDIO_FORMAT_DSP_F32);
+				return -EINVAL;
+			}
+			port->blocks = 1;
+			port->stride = 4;
+		}
+		else if (PORT_IS_CONTROL(this, direction, port_id)) {
+			if (info.media_type != SPA_MEDIA_TYPE_application ||
+			    info.media_subtype != SPA_MEDIA_SUBTYPE_control) {
+				spa_log_error(this->log, "unexpected types %d/%d",
+						info.media_type, info.media_subtype);
+				return -EINVAL;
+			}
+			port->blocks = 1;
+			port->stride = 1;
+		}
+		else {
+			if (info.media_type != SPA_MEDIA_TYPE_audio ||
+			    info.media_subtype != SPA_MEDIA_SUBTYPE_raw) {
+				spa_log_error(this->log, "unexpected types %d/%d",
+						info.media_type, info.media_subtype);
+				return -EINVAL;
+			}
+			if ((res = spa_format_audio_raw_parse(format, &info.info.raw)) < 0) {
+				spa_log_error(this->log, "can't parse format %s", spa_strerror(res));
+				return res;
+			}
+			if (info.info.raw.format == 0 ||
+			    info.info.raw.rate == 0 ||
+			    info.info.raw.channels == 0 ||
+			    info.info.raw.channels > SPA_AUDIO_MAX_CHANNELS) {
+				spa_log_error(this->log, "invalid format:%d rate:%d channels:%d",
+						info.info.raw.format, info.info.raw.rate,
+						info.info.raw.channels);
+				return -EINVAL;
+			}
+			port->stride = calc_width(&info);
+			if (SPA_AUDIO_FORMAT_IS_PLANAR(info.info.raw.format)) {
+				port->blocks = info.info.raw.channels;
+			} else {
+				port->stride *= info.info.raw.channels;
+				port->blocks = 1;
+			}
+			this->dir[direction].format = info;
+			this->dir[direction].have_format = true;
+			this->setup = false;
+		}
+		port->format = info;
+		port->have_format = true;
+
+		spa_log_debug(this->log, "%p: %d %d %d", this,
+				port_id, port->stride, port->blocks);
+	}
+
+	port->info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
+	if (port->have_format) {
+		port->params[IDX_Format] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_READWRITE);
+		port->params[IDX_Buffers] = SPA_PARAM_INFO(SPA_PARAM_Buffers, SPA_PARAM_INFO_READ);
+	} else {
+		port->params[IDX_Format] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
+		port->params[IDX_Buffers] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
+	}
+	emit_port_info(this, port, false);
+
+	return 0;
+}
+
+
+static int
+impl_node_port_set_param(void *object,
+			 enum spa_direction direction, uint32_t port_id,
+			 uint32_t id, uint32_t flags,
+			 const struct spa_pod *param)
+{
+	struct impl *this = object;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_log_debug(this->log, "%p: set param port %d.%d %u",
+			this, direction, port_id, id);
+
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	switch (id) {
+	case SPA_PARAM_Latency:
+		return port_set_latency(this, direction, port_id, flags, param);
+	case SPA_PARAM_Format:
+		return port_set_format(this, direction, port_id, flags, param);
+	default:
+		return -ENOENT;
+	}
+}
+
+static void queue_buffer(struct impl *this, struct port *port, uint32_t id)
+{
+	struct buffer *b = &port->buffers[id];
+
+	spa_log_trace_fp(this->log, "%p: queue buffer %d on port %d %d",
+			this, id, port->id, b->flags);
+	if (SPA_FLAG_IS_SET(b->flags, BUFFER_FLAG_QUEUED))
+		return;
+
+	spa_list_append(&port->queue, &b->link);
+	SPA_FLAG_SET(b->flags, BUFFER_FLAG_QUEUED);
+}
+
+static struct buffer *peek_buffer(struct impl *this, struct port *port)
+{
+	struct buffer *b;
+
+	if (spa_list_is_empty(&port->queue))
+		return NULL;
+
+	b = spa_list_first(&port->queue, struct buffer, link);
+	spa_log_trace_fp(this->log, "%p: peek buffer %d on port %d %u",
+			this, b->id, port->id, b->flags);
+	return b;
+}
+
+static void dequeue_buffer(struct impl *this, struct port *port, struct buffer *b)
+{
+	spa_list_remove(&b->link);
+	SPA_FLAG_CLEAR(b->flags, BUFFER_FLAG_QUEUED);
+	spa_log_trace_fp(this->log, "%p: dequeue buffer %d on port %d %u",
+			this, b->id, port->id, b->flags);
+}
+
+static int
+impl_node_port_use_buffers(void *object,
+			   enum spa_direction direction,
+			   uint32_t port_id,
+			   uint32_t flags,
+			   struct spa_buffer **buffers,
+			   uint32_t n_buffers)
+{
+	struct impl *this = object;
+	struct port *port;
+	uint32_t i, j, maxsize;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	port = GET_PORT(this, direction, port_id);
+
+	spa_log_debug(this->log, "%p: use buffers %d on port %d:%d",
+			this, n_buffers, direction, port_id);
+
+	clear_buffers(this, port);
+
+	if (n_buffers > 0 && !port->have_format)
+		return -EIO;
+	if (n_buffers > MAX_BUFFERS)
+		return -ENOSPC;
+
+	maxsize = this->quantum_limit * sizeof(float);
+
+	for (i = 0; i < n_buffers; i++) {
+		struct buffer *b;
+		uint32_t n_datas = buffers[i]->n_datas;
+		struct spa_data *d = buffers[i]->datas;
+
+		b = &port->buffers[i];
+		b->id = i;
+		b->flags = 0;
+		b->buf = buffers[i];
+
+		if (n_datas != port->blocks) {
+			spa_log_error(this->log, "%p: invalid blocks %d on buffer %d",
+					this, n_datas, i);
+			return -EINVAL;
+		}
+
+		for (j = 0; j < n_datas; j++) {
+			if (d[j].data == NULL) {
+				spa_log_error(this->log, "%p: invalid memory %d on buffer %d %d %p",
+						this, j, i, d[j].type, d[j].data);
+				return -EINVAL;
+			}
+			if (!SPA_IS_ALIGNED(d[j].data, this->max_align)) {
+				spa_log_warn(this->log, "%p: memory %d on buffer %d not aligned",
+						this, j, i);
+			}
+			if (direction == SPA_DIRECTION_OUTPUT &&
+			    !SPA_FLAG_IS_SET(d[j].flags, SPA_DATA_FLAG_DYNAMIC))
+				this->is_passthrough = false;
+
+			b->datas[j] = d[j].data;
+
+			maxsize = SPA_MAX(maxsize, d[j].maxsize);
+		}
+		if (direction == SPA_DIRECTION_OUTPUT)
+			queue_buffer(this, port, i);
+	}
+	if (maxsize > this->empty_size) {
+		this->empty = realloc(this->empty, maxsize + MAX_ALIGN);
+		this->scratch = realloc(this->scratch, maxsize + MAX_ALIGN);
+		this->tmp[0] = realloc(this->tmp[0], (maxsize + MAX_ALIGN) * MAX_PORTS);
+		this->tmp[1] = realloc(this->tmp[1], (maxsize + MAX_ALIGN) * MAX_PORTS);
+		if (this->empty == NULL || this->scratch == NULL ||
+		    this->tmp[0] == NULL || this->tmp[1] == NULL)
+			return -errno;
+		memset(this->empty, 0, maxsize + MAX_ALIGN);
+		this->empty_size = maxsize;
+	}
+	port->n_buffers = n_buffers;
+
+	return 0;
+}
+
+static int
+impl_node_port_set_io(void *object,
+		      enum spa_direction direction, uint32_t port_id,
+		      uint32_t id, void *data, size_t size)
+{
+	struct impl *this = object;
+	struct port *port;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_log_debug(this->log, "%p: set io %d on port %d:%d %p",
+			this, id, direction, port_id, data);
+
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	port = GET_PORT(this, direction, port_id);
+
+	switch (id) {
+	case SPA_IO_Buffers:
+		port->io = data;
+		break;
+	case SPA_IO_RateMatch:
+		this->io_rate_match = data;
+		break;
+	default:
+		return -ENOENT;
+	}
+	return 0;
+}
+
+static int impl_node_port_reuse_buffer(void *object, uint32_t port_id, uint32_t buffer_id)
+{
+	struct impl *this = object;
+	struct port *port;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(CHECK_PORT(this, SPA_DIRECTION_OUTPUT, port_id), -EINVAL);
+
+	port = GET_OUT_PORT(this, port_id);
+	queue_buffer(this, port, buffer_id);
+
+	return 0;
+}
+
+static int channelmix_process_control(struct impl *this, struct port *ctrlport,
+				      void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
+				      uint32_t n_samples)
+{
+	struct spa_pod_control *c, *prev = NULL;
+	uint32_t avail_samples = n_samples;
+	uint32_t i;
+	const float *s[MAX_PORTS], **ss = (const float**) src;
+	float *d[MAX_PORTS], **sd = (float **) dst;
+	const struct spa_pod_sequence_body *body = &(ctrlport->ctrl)->body;
+	uint32_t size = SPA_POD_BODY_SIZE(ctrlport->ctrl);
+	bool end = false;
+
+	c = spa_pod_control_first(body);
+	while (true) {
+		uint32_t chunk;
+
+		if (c == NULL || !spa_pod_control_is_inside(body, size, c)) {
+			c = NULL;
+			end = true;
+		}
+		if (avail_samples == 0)
+			break;
+
+		/* ignore old control offsets */
+		if (c != NULL) {
+			if (c->offset <= ctrlport->ctrl_offset) {
+				prev = c;
+				if (c != NULL)
+					c = spa_pod_control_next(c);
+				continue;
+			}
+			chunk = SPA_MIN(avail_samples, c->offset - ctrlport->ctrl_offset);
+			spa_log_trace_fp(this->log, "%p: process %d-%d %d/%d", this,
+					ctrlport->ctrl_offset, c->offset, chunk, avail_samples);
+		} else {
+			chunk = avail_samples;
+			spa_log_trace_fp(this->log, "%p: process remain %d", this, chunk);
+		}
+
+		if (prev) {
+			switch (prev->type) {
+			case SPA_CONTROL_Midi:
+				apply_midi(this, &prev->value);
+				break;
+			case SPA_CONTROL_Properties:
+				apply_props(this, &prev->value);
+				break;
+			default:
+				continue;
+			}
+		}
+		if (ss == (const float**)src && chunk != avail_samples) {
+			for (i = 0; i < this->mix.src_chan; i++)
+				s[i] = ss[i];
+			for (i = 0; i < this->mix.dst_chan; i++)
+				d[i] = sd[i];
+			ss = s;
+			sd = d;
+		}
+
+		channelmix_process(&this->mix, (void**)sd, (const void**)ss, chunk);
+
+		if (chunk != avail_samples) {
+			for (i = 0; i < this->mix.src_chan; i++)
+				ss[i] += chunk;
+			for (i = 0; i < this->mix.dst_chan; i++)
+				sd[i] += chunk;
+		}
+		avail_samples -= chunk;
+		ctrlport->ctrl_offset += chunk;
+	}
+	return end ? 1 : 0;
+}
+
+static uint32_t resample_get_in_size(struct impl *this, bool passthrough, uint32_t out_size)
+{
+	uint32_t match_size = passthrough ? out_size : resample_in_len(&this->resample, out_size);
+	spa_log_trace_fp(this->log, "%p: current match %u", this, match_size);
+	return match_size;
+}
+
+static uint32_t resample_update_rate_match(struct impl *this, bool passthrough, uint32_t out_size, uint32_t in_queued)
+{
+	uint32_t delay, match_size;
+
+	if (passthrough) {
+		delay = 0;
+		match_size = out_size;
+	} else {
+		double rate = this->rate_scale / this->props.rate;
+		if (this->io_rate_match &&
+		    SPA_FLAG_IS_SET(this->io_rate_match->flags, SPA_IO_RATE_MATCH_FLAG_ACTIVE))
+			rate *= this->io_rate_match->rate;
+		resample_update_rate(&this->resample, rate);
+		delay = resample_delay(&this->resample);
+		match_size = resample_in_len(&this->resample, out_size);
+	}
+	match_size -= SPA_MIN(match_size, in_queued);
+
+	spa_log_trace_fp(this->log, "%p: next match %u", this, match_size);
+
+	if (this->io_rate_match) {
+		this->io_rate_match->delay = delay;
+		this->io_rate_match->size = match_size;
+	}
+	return match_size;
+}
+
+static inline bool resample_is_passthrough(struct impl *this)
+{
+	return this->resample.i_rate == this->resample.o_rate && this->rate_scale == 1.0 &&
+		!this->rate_adjust && (this->io_rate_match == NULL ||
+		 !SPA_FLAG_IS_SET(this->io_rate_match->flags, SPA_IO_RATE_MATCH_FLAG_ACTIVE));
+}
+
+static int impl_node_process(void *object)
+{
+	struct impl *this = object;
+	const void *src_datas[MAX_PORTS], **in_datas;
+	void *dst_datas[MAX_PORTS], *remap_src_datas[MAX_PORTS], *remap_dst_datas[MAX_PORTS];
+	void **out_datas, **dst_remap;
+	uint32_t i, j, n_src_datas = 0, n_dst_datas = 0, n_mon_datas = 0, remap;
+	uint32_t n_samples, max_in, n_out, max_out, quant_samples;
+	struct port *port, *ctrlport = NULL;
+	struct buffer *buf, *out_bufs[MAX_PORTS];
+	struct spa_data *bd;
+	struct dir *dir;
+	int tmp = 0, res = 0;
+	bool in_passthrough, mix_passthrough, resample_passthrough, out_passthrough;
+	bool in_avail = false, flush_in = false, flush_out = false, draining = false, in_empty = true;
+	struct spa_io_buffers *io, *ctrlio = NULL;
+	const struct spa_pod_sequence *ctrl = NULL;
+
+	/* calculate quantum scale, this is how many samples we need to produce or
+	 * consume. Also update the rate scale, this is sent to the resampler to adjust
+	 * the rate, either when the graph clock changed or when the user adjusted the
+	 * rate.  */
+	if (SPA_LIKELY(this->io_position)) {
+		double r =  this->rate_scale;
+
+		quant_samples = this->io_position->clock.duration;
+		if (this->direction == SPA_DIRECTION_INPUT) {
+			if (this->io_position->clock.rate.denom != this->resample.o_rate)
+				r = (double) this->io_position->clock.rate.denom / this->resample.o_rate;
+			else
+				r = 1.0;
+		} else {
+			if (this->io_position->clock.rate.denom != this->resample.i_rate)
+				r = (double) this->resample.i_rate / this->io_position->clock.rate.denom;
+			else
+				r = 1.0;
+		}
+		if (this->rate_scale != r) {
+			spa_log_info(this->log, "scale %f->%f", this->rate_scale, r);
+			this->rate_scale = r;
+		}
+	}
+	else
+		quant_samples = this->quantum_limit;
+
+	dir = &this->dir[SPA_DIRECTION_INPUT];
+	in_passthrough = dir->conv.is_passthrough;
+	max_in = UINT32_MAX;
+
+	/* collect input port data */
+	for (i = 0; i < dir->n_ports; i++) {
+		port = GET_IN_PORT(this, i);
+
+		if (SPA_UNLIKELY((io = port->io) == NULL)) {
+			spa_log_trace_fp(this->log, "%p: no io on input port %d",
+					this, port->id);
+			buf = NULL;
+		} else if (SPA_UNLIKELY(io->status != SPA_STATUS_HAVE_DATA)) {
+			if (io->status & SPA_STATUS_DRAINED) {
+				spa_log_debug(this->log, "%p: port %d drained", this, port->id);
+				in_avail = flush_in = draining = true;
+			} else {
+				spa_log_trace_fp(this->log, "%p: empty input port %d %p %d %d %d",
+						this, port->id, io, io->status, io->buffer_id,
+						port->n_buffers);
+				this->drained = false;
+			}
+			buf = NULL;
+		} else if (SPA_UNLIKELY(io->buffer_id >= port->n_buffers)) {
+			spa_log_trace_fp(this->log, "%p: invalid input buffer port %d %p %d %d %d",
+					this, port->id, io, io->status, io->buffer_id,
+					port->n_buffers);
+			io->status = -EINVAL;
+			buf = NULL;
+		} else {
+			spa_log_trace_fp(this->log, "%p: input buffer port %d io:%p status:%d id:%d n:%d",
+					this, port->id, io, io->status, io->buffer_id,
+					port->n_buffers);
+			buf = &port->buffers[io->buffer_id];
+		}
+
+		if (SPA_UNLIKELY(buf == NULL)) {
+			for (j = 0; j < port->blocks; j++) {
+				if (port->is_control) {
+					spa_log_trace_fp(this->log, "%p: empty control %d", this,
+							i * port->blocks + j);
+				} else {
+					remap = n_src_datas++;
+					src_datas[remap] = SPA_PTR_ALIGN(this->empty, MAX_ALIGN, void);
+					spa_log_trace_fp(this->log, "%p: empty input %d->%d", this,
+							i * port->blocks + j, remap);
+					max_in = SPA_MIN(max_in, this->empty_size / port->stride);
+				}
+			}
+		} else {
+			in_avail = true;
+			for (j = 0; j < port->blocks; j++) {
+				uint32_t offs, size;
+
+				bd = &buf->buf->datas[j];
+
+				offs = SPA_MIN(bd->chunk->offset, bd->maxsize);
+				size = SPA_MIN(bd->maxsize - offs, bd->chunk->size);
+				if (!SPA_FLAG_IS_SET(bd->chunk->flags, SPA_CHUNK_FLAG_EMPTY))
+					in_empty = false;
+
+				if (SPA_UNLIKELY(port->is_control)) {
+					spa_log_trace_fp(this->log, "%p: control %d", this,
+							i * port->blocks + j);
+					ctrlport = port;
+					ctrlio = io;
+					ctrl = spa_pod_from_data(bd->data, bd->maxsize,
+							bd->chunk->offset, bd->chunk->size);
+					if (ctrl && !spa_pod_is_sequence(&ctrl->pod))
+						ctrl = NULL;
+					if (ctrl != ctrlport->ctrl) {
+						ctrlport->ctrl = ctrl;
+						ctrlport->ctrl_offset = 0;
+					}
+				} else  {
+					max_in = SPA_MIN(max_in, size / port->stride);
+
+					remap = n_src_datas++;
+					offs += this->in_offset * port->stride;
+					src_datas[remap] = SPA_PTROFF(bd->data, offs, void);
+
+					spa_log_trace_fp(this->log, "%p: input %d:%d:%d %d %d %d->%d", this,
+							offs, size, port->stride, this->in_offset, max_in,
+							i * port->blocks + j, remap);
+				}
+			}
+		}
+	}
+
+	/* calculate how many samples we are going to produce. */
+	if (this->direction == SPA_DIRECTION_INPUT) {
+		/* in split mode we need to output exactly the size of the
+		 * duration so we don't try to flush early */
+		max_out = quant_samples;
+		flush_out = false;
+	} else {
+		/* in merge mode we consume one duration of samples and
+		 * always output the resulting data */
+		max_out = this->quantum_limit;
+		flush_out = true;
+	}
+
+	dir = &this->dir[SPA_DIRECTION_OUTPUT];
+	/* collect output ports and monitor ports data */
+	for (i = 0; i < dir->n_ports; i++) {
+		port = GET_OUT_PORT(this, i);
+
+		if (SPA_UNLIKELY((io = port->io) == NULL ||
+		    io->status == SPA_STATUS_HAVE_DATA)) {
+			buf = NULL;
+		}
+		else {
+			if (SPA_LIKELY(io->buffer_id < port->n_buffers))
+				queue_buffer(this, port, io->buffer_id);
+
+			buf = peek_buffer(this, port);
+		}
+		out_bufs[i] = buf;
+
+		if (SPA_UNLIKELY(buf == NULL)) {
+			for (j = 0; j < port->blocks; j++) {
+				if (port->is_monitor) {
+					remap = n_mon_datas++;
+					spa_log_trace_fp(this->log, "%p: empty monitor %d", this,
+						remap);
+				} else if (port->is_control) {
+					spa_log_trace_fp(this->log, "%p: empty control %d", this, j);
+				} else {
+					remap = n_dst_datas++;
+					dst_datas[remap] = SPA_PTR_ALIGN(this->scratch, MAX_ALIGN, void);
+					spa_log_trace_fp(this->log, "%p: empty output %d->%d", this,
+						i * port->blocks + j, remap);
+					max_out = SPA_MIN(max_out, this->empty_size / port->stride);
+				}
+			}
+		} else {
+			for (j = 0; j < port->blocks; j++) {
+				bd = &buf->buf->datas[j];
+
+				bd->chunk->offset = 0;
+				bd->chunk->size = 0;
+				if (port->is_monitor) {
+					float volume;
+					uint32_t mon_max;
+
+					remap = n_mon_datas++;
+					volume = this->props.monitor.mute ? 0.0f : this->props.monitor.volumes[remap];
+					if (this->monitor_channel_volumes)
+						volume *= this->props.channel.mute ? 0.0f :
+							this->props.channel.volumes[remap];
+
+					mon_max = SPA_MIN(bd->maxsize / port->stride, max_in);
+
+					volume_process(&this->volume, bd->data, src_datas[remap],
+							volume, mon_max);
+
+					bd->chunk->size = mon_max * port->stride;
+					bd->chunk->stride = port->stride;
+
+					spa_log_trace_fp(this->log, "%p: monitor %d %d", this,
+							remap, mon_max);
+
+					dequeue_buffer(this, port, buf);
+					io->status = SPA_STATUS_HAVE_DATA;
+					io->buffer_id = buf->id;
+					res |= SPA_STATUS_HAVE_DATA;
+				} else if (SPA_UNLIKELY(port->is_control)) {
+					spa_log_trace_fp(this->log, "%p: control %d", this, j);
+				} else {
+					remap = n_dst_datas++;
+					dst_datas[remap] = SPA_PTROFF(bd->data,
+							this->out_offset * port->stride, void);
+					max_out = SPA_MIN(max_out, bd->maxsize / port->stride);
+
+					spa_log_trace_fp(this->log, "%p: output %d offs:%d %d->%d", this,
+							max_out, this->out_offset,
+							i * port->blocks + j, remap);
+				}
+			}
+		}
+	}
+
+
+	/* calculate how many samples at most we are going to consume. If we're
+	 * draining, we consume as much as we can. Otherwise we consume what is
+	 * left. */
+	if (SPA_UNLIKELY(draining))
+		n_samples = SPA_MIN(max_in, this->quantum_limit);
+	else {
+		n_samples = max_in - SPA_MIN(max_in, this->in_offset);
+	}
+	/* we only need to output the remaining samples */
+	n_out = max_out - SPA_MIN(max_out, this->out_offset);
+
+	resample_passthrough = resample_is_passthrough(this);
+
+	/* calculate how many samples we are going to consume. */
+	if (this->direction == SPA_DIRECTION_INPUT) {
+		if (!in_avail || this->drained) {
+			/* no input, ask for more, update rate-match first */
+			resample_update_rate_match(this, resample_passthrough, n_out, 0);
+			spa_log_trace_fp(this->log, "%p: no input drained:%d", this, this->drained);
+			res |= this->drained ? SPA_STATUS_DRAINED : SPA_STATUS_NEED_DATA;
+			return res;
+		}
+		/* else figure out how much input samples we need to consume */
+		n_samples = SPA_MIN(n_samples,
+				resample_get_in_size(this, resample_passthrough, n_out));
+	} else {
+		/* in merge mode we consume one duration of samples */
+		n_samples = SPA_MIN(n_samples, quant_samples);
+		flush_in = true;
+	}
+
+	mix_passthrough = SPA_FLAG_IS_SET(this->mix.flags, CHANNELMIX_FLAG_IDENTITY) &&
+		(ctrlport == NULL || ctrlport->ctrl == NULL);
+
+	out_passthrough = dir->conv.is_passthrough;
+	if (in_passthrough && mix_passthrough && resample_passthrough)
+		out_passthrough = false;
+
+	if (out_passthrough && dir->need_remap) {
+		for (i = 0; i < dir->conv.n_channels; i++) {
+			remap_dst_datas[i] = dst_datas[dir->remap[i]];
+			spa_log_trace_fp(this->log, "%p: output remap %d -> %d", this, i, dir->remap[i]);
+		}
+		dst_remap = (void **)remap_dst_datas;
+	} else {
+		dst_remap = (void **)dst_datas;
+	}
+
+	dir = &this->dir[SPA_DIRECTION_INPUT];
+	if (!in_passthrough) {
+		if (mix_passthrough && resample_passthrough && out_passthrough)
+			out_datas = (void **)dst_remap;
+		else
+			out_datas = (void **)this->tmp_datas[(tmp++) & 1];
+
+		if (dir->need_remap) {
+			for (i = 0; i < dir->conv.n_channels; i++) {
+				remap_src_datas[i] = out_datas[dir->remap[i]];
+				spa_log_trace_fp(this->log, "%p: input remap %d -> %d", this, dir->remap[i], i);
+			}
+		} else {
+			for (i = 0; i < dir->conv.n_channels; i++)
+				remap_src_datas[i] = out_datas[i];
+		}
+
+		spa_log_trace_fp(this->log, "%p: input convert %d", this, n_samples);
+		convert_process(&dir->conv, remap_src_datas, src_datas, n_samples);
+	} else {
+		if (dir->need_remap) {
+			for (i = 0; i < dir->conv.n_channels; i++) {
+				remap_src_datas[dir->remap[i]] = (void *)src_datas[i];
+				spa_log_trace_fp(this->log, "%p: input remap %d -> %d", this, dir->remap[i], i);
+			}
+			out_datas = (void **)remap_src_datas;
+		} else {
+			out_datas = (void **)src_datas;
+		}
+	}
+
+	if (!mix_passthrough) {
+		in_datas = (const void**)out_datas;
+		if (resample_passthrough && out_passthrough) {
+			out_datas = (void **)dst_remap;
+			n_samples = SPA_MIN(n_samples, n_out);
+		} else {
+			out_datas = (void **)this->tmp_datas[(tmp++) & 1];
+		}
+		spa_log_trace_fp(this->log, "%p: channelmix %d %d %d", this, n_samples,
+				resample_passthrough, out_passthrough);
+		if (ctrlport != NULL && ctrlport->ctrl != NULL) {
+			if (channelmix_process_control(this, ctrlport, out_datas,
+						in_datas, n_samples) == 1) {
+				ctrlio->status = SPA_STATUS_OK;
+				ctrlport->ctrl = NULL;
+			}
+		} else {
+			channelmix_process(&this->mix, out_datas, in_datas, n_samples);
+		}
+	}
+	if (!resample_passthrough) {
+		uint32_t in_len, out_len;
+
+		in_datas = (const void**)out_datas;
+		if (out_passthrough)
+			out_datas = (void **)dst_remap;
+		else
+			out_datas = (void **)this->tmp_datas[(tmp++) & 1];
+
+		in_len = n_samples;
+		out_len = n_out;
+		resample_process(&this->resample, in_datas, &in_len, out_datas, &out_len);
+		spa_log_trace_fp(this->log, "%p: resample %d/%d -> %d/%d %d", this,
+				n_samples, in_len, n_out, out_len, out_passthrough);
+		this->in_offset += in_len;
+		n_samples = out_len;
+	} else {
+		n_samples = SPA_MIN(n_samples, n_out);
+		this->in_offset += n_samples;
+	}
+	this->out_offset += n_samples;
+
+	if (!out_passthrough) {
+		dir = &this->dir[SPA_DIRECTION_OUTPUT];
+		if (dir->need_remap) {
+			for (i = 0; i < dir->conv.n_channels; i++) {
+				remap_dst_datas[dir->remap[i]] = out_datas[i];
+				spa_log_trace_fp(this->log, "%p: output remap %d -> %d", this, i, dir->remap[i]);
+			}
+			in_datas = (const void**)remap_dst_datas;
+		} else {
+			in_datas = (const void**)out_datas;
+		}
+		spa_log_trace_fp(this->log, "%p: output convert %d", this, n_samples);
+		convert_process(&dir->conv, dst_datas, in_datas, n_samples);
+	}
+
+	spa_log_trace_fp(this->log, "%d/%d  %d/%d %d->%d", this->in_offset, max_in,
+			this->out_offset, max_out, n_samples, n_out);
+
+	dir = &this->dir[SPA_DIRECTION_INPUT];
+	if (SPA_LIKELY(this->in_offset >= max_in || flush_in)) {
+		/* return input buffers */
+		for (i = 0; i < dir->n_ports; i++) {
+			port = GET_IN_PORT(this, i);
+			if (port->is_control)
+				continue;
+			if (SPA_UNLIKELY((io = port->io) == NULL))
+				continue;
+			spa_log_trace_fp(this->log, "return: input %d %d", port->id, io->buffer_id);
+			if (!draining)
+				io->status = SPA_STATUS_NEED_DATA;
+		}
+		this->in_offset = 0;
+		max_in = 0;
+		res |= SPA_STATUS_NEED_DATA;
+	}
+
+	dir = &this->dir[SPA_DIRECTION_OUTPUT];
+	if (SPA_LIKELY(n_samples > 0 && (this->out_offset >= max_out || flush_out))) {
+		/* queue output buffers */
+		for (i = 0; i < dir->n_ports; i++) {
+			port = GET_OUT_PORT(this, i);
+			if (SPA_UNLIKELY(port->is_monitor || port->is_control))
+				continue;
+			if (SPA_UNLIKELY((io = port->io) == NULL))
+				continue;
+
+			if (SPA_UNLIKELY((buf = out_bufs[i]) == NULL))
+				continue;
+
+			dequeue_buffer(this, port, buf);
+
+			for (j = 0; j < port->blocks; j++) {
+				bd = &buf->buf->datas[j];
+				bd->chunk->size = this->out_offset * port->stride;
+				bd->chunk->stride = port->stride;
+				SPA_FLAG_UPDATE(bd->chunk->flags, SPA_CHUNK_FLAG_EMPTY, in_empty);
+				spa_log_trace_fp(this->log, "out: offs:%d stride:%d size:%d",
+						this->out_offset, port->stride, bd->chunk->size);
+			}
+			io->status = SPA_STATUS_HAVE_DATA;
+			io->buffer_id = buf->id;
+		}
+		res |= SPA_STATUS_HAVE_DATA;
+		this->drained = draining;
+		this->out_offset = 0;
+	}
+	else if (n_samples == 0 && this->resample_peaks) {
+		for (i = 0; i < dir->n_ports; i++) {
+			port = GET_OUT_PORT(this, i);
+			if (port->is_monitor || port->is_control)
+				continue;
+			if (SPA_UNLIKELY((io = port->io) == NULL))
+				continue;
+
+			io->status = SPA_STATUS_HAVE_DATA;
+			io->buffer_id = SPA_ID_INVALID;
+			res |= SPA_STATUS_HAVE_DATA;
+			spa_log_trace_fp(this->log, "%p: no output buffer", this);
+		}
+	}
+	if (resample_update_rate_match(this, resample_passthrough,
+			max_out - this->out_offset,
+			max_in - this->in_offset) > 0)
+		res |= SPA_STATUS_NEED_DATA;
+
+	return res;
+}
+
+static const struct spa_node_methods impl_node = {
+	SPA_VERSION_NODE_METHODS,
+	.add_listener = impl_node_add_listener,
+	.set_callbacks = impl_node_set_callbacks,
+	.enum_params = impl_node_enum_params,
+	.set_param = impl_node_set_param,
+	.set_io = impl_node_set_io,
+	.send_command = impl_node_send_command,
+	.add_port = impl_node_add_port,
+	.remove_port = impl_node_remove_port,
+	.port_enum_params = impl_node_port_enum_params,
+	.port_set_param = impl_node_port_set_param,
+	.port_use_buffers = impl_node_port_use_buffers,
+	.port_set_io = impl_node_port_set_io,
+	.port_reuse_buffer = impl_node_port_reuse_buffer,
+	.process = impl_node_process,
+};
+
+static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
+{
+	struct impl *this;
+
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+	spa_return_val_if_fail(interface != NULL, -EINVAL);
+
+	this = (struct impl *) handle;
+
+	if (spa_streq(type, SPA_TYPE_INTERFACE_Node))
+		*interface = &this->node;
+	else
+		return -ENOENT;
+
+	return 0;
+}
+
+static int impl_clear(struct spa_handle *handle)
+{
+	struct impl *this;
+	uint32_t i;
+
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+
+	this = (struct impl *) handle;
+
+	for (i = 0; i < MAX_PORTS; i++)
+		free(this->dir[SPA_DIRECTION_INPUT].ports[i]);
+	for (i = 0; i < MAX_PORTS; i++)
+		free(this->dir[SPA_DIRECTION_OUTPUT].ports[i]);
+	free(this->empty);
+	free(this->scratch);
+	free(this->tmp[0]);
+	free(this->tmp[1]);
+
+	if (this->resample.free)
+		resample_free(&this->resample);
+	if (this->dir[0].conv.free)
+		convert_free(&this->dir[0].conv);
+	if (this->dir[1].conv.free)
+		convert_free(&this->dir[1].conv);
+
+	return 0;
+}
+
+static size_t
+impl_get_size(const struct spa_handle_factory *factory,
+	      const struct spa_dict *params)
+{
+	return sizeof(struct impl);
+}
+
+static uint32_t channel_from_name(const char *name)
+{
+	int i;
+	for (i = 0; spa_type_audio_channel[i].name; i++) {
+		if (spa_streq(name, spa_debug_type_short_name(spa_type_audio_channel[i].name)))
+			return spa_type_audio_channel[i].type;
+	}
+	return SPA_AUDIO_CHANNEL_UNKNOWN;
+}
+
+static inline uint32_t parse_position(uint32_t *pos, const char *val, size_t len)
+{
+	struct spa_json it[2];
+	char v[256];
+	uint32_t i = 0;
+
+	spa_json_init(&it[0], val, len);
+	if (spa_json_enter_array(&it[0], &it[1]) <= 0)
+		spa_json_init(&it[1], val, len);
+
+	while (spa_json_get_string(&it[1], v, sizeof(v)) > 0 &&
+			i < SPA_AUDIO_MAX_CHANNELS) {
+		pos[i++] = channel_from_name(v);
+	}
+	return i;
+}
+
+
+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 impl *this;
+	uint32_t i;
+
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+
+	handle->get_interface = impl_get_interface;
+	handle->clear = impl_clear;
+
+	this = (struct impl *) handle;
+
+	this->log = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log);
+	spa_log_topic_init(this->log, log_topic);
+
+	this->cpu = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_CPU);
+	if (this->cpu) {
+		this->cpu_flags = spa_cpu_get_flags(this->cpu);
+		this->max_align = SPA_MIN(MAX_ALIGN, spa_cpu_get_max_align(this->cpu));
+	}
+
+	props_reset(&this->props);
+
+	this->mix.options = CHANNELMIX_OPTION_UPMIX | CHANNELMIX_OPTION_MIX_LFE;
+	this->mix.upmix = CHANNELMIX_UPMIX_PSD;
+	this->mix.log = this->log;
+	this->mix.lfe_cutoff = 150.0f;
+	this->mix.fc_cutoff = 12000.0f;
+	this->mix.rear_delay = 12.0f;
+	this->mix.widen = 0.0f;
+
+	for (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, &this->quantum_limit, 0);
+		else if (spa_streq(k, "resample.peaks"))
+			this->resample_peaks = spa_atob(s);
+		else if (spa_streq(k, "resample.prefill"))
+			SPA_FLAG_UPDATE(this->resample.options,
+				RESAMPLE_OPTION_PREFILL, spa_atob(s));
+		else if (spa_streq(k, "factory.mode")) {
+			if (spa_streq(s, "merge"))
+				this->direction = SPA_DIRECTION_OUTPUT;
+			else
+				this->direction = SPA_DIRECTION_INPUT;
+		}
+		else if (spa_streq(k, SPA_KEY_AUDIO_POSITION)) {
+			if (s != NULL)
+	                        this->props.n_channels = parse_position(this->props.channel_map, s, strlen(s));
+		}
+		else
+			audioconvert_set_param(this, k, s);
+	}
+
+	this->props.channel.n_volumes = this->props.n_channels;
+	this->props.soft.n_volumes = this->props.n_channels;
+	this->props.monitor.n_volumes = this->props.n_channels;
+
+	this->dir[SPA_DIRECTION_INPUT].direction = SPA_DIRECTION_INPUT;
+	this->dir[SPA_DIRECTION_INPUT].latency = SPA_LATENCY_INFO(SPA_DIRECTION_INPUT);
+	this->dir[SPA_DIRECTION_OUTPUT].direction = SPA_DIRECTION_OUTPUT;
+	this->dir[SPA_DIRECTION_OUTPUT].latency = SPA_LATENCY_INFO(SPA_DIRECTION_OUTPUT);
+
+	this->node.iface = SPA_INTERFACE_INIT(
+			SPA_TYPE_INTERFACE_Node,
+			SPA_VERSION_NODE,
+			&impl_node, this);
+	spa_hook_list_init(&this->hooks);
+
+	this->info_all = SPA_NODE_CHANGE_MASK_FLAGS |
+			SPA_NODE_CHANGE_MASK_PARAMS;
+	this->info = SPA_NODE_INFO_INIT();
+	this->info.max_input_ports = MAX_PORTS;
+	this->info.max_output_ports = MAX_PORTS;
+	this->info.flags = SPA_NODE_FLAG_RT |
+		SPA_NODE_FLAG_IN_PORT_CONFIG |
+		SPA_NODE_FLAG_OUT_PORT_CONFIG |
+		SPA_NODE_FLAG_NEED_CONFIGURE;
+	this->params[IDX_EnumPortConfig] = SPA_PARAM_INFO(SPA_PARAM_EnumPortConfig, SPA_PARAM_INFO_READ);
+	this->params[IDX_PortConfig] = SPA_PARAM_INFO(SPA_PARAM_PortConfig, SPA_PARAM_INFO_READWRITE);
+	this->params[IDX_PropInfo] = SPA_PARAM_INFO(SPA_PARAM_PropInfo, SPA_PARAM_INFO_READ);
+	this->params[IDX_Props] = SPA_PARAM_INFO(SPA_PARAM_Props, SPA_PARAM_INFO_READWRITE);
+	this->info.params = this->params;
+	this->info.n_params = N_NODE_PARAMS;
+
+	this->volume.cpu_flags = this->cpu_flags;
+	volume_init(&this->volume);
+
+	this->rate_scale = 1.0;
+
+	reconfigure_mode(this, SPA_PARAM_PORT_CONFIG_MODE_convert, SPA_DIRECTION_INPUT, false, false, NULL);
+	reconfigure_mode(this, SPA_PARAM_PORT_CONFIG_MODE_convert, SPA_DIRECTION_OUTPUT, false, false, NULL);
+
+	return 0;
+}
+
+static const struct spa_interface_info impl_interfaces[] = {
+	{SPA_TYPE_INTERFACE_Node,},
+};
+
+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;
+}
+
+const struct spa_handle_factory spa_audioconvert_factory = {
+	SPA_VERSION_HANDLE_FACTORY,
+	SPA_NAME_AUDIO_CONVERT,
+	NULL,
+	impl_get_size,
+	impl_init,
+	impl_enum_interface_info,
+};