pipewire/spa/plugins/alsa/alsa-pcm-sink.c

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/* Spa ALSA Sink */
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
/* SPDX-License-Identifier: MIT */
#include <stddef.h>
#include <alsa/asoundlib.h>
#include <spa/node/node.h>
#include <spa/node/utils.h>
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#include <spa/node/keys.h>
#include <spa/monitor/device.h>
#include <spa/utils/keys.h>
#include <spa/utils/names.h>
#include <spa/utils/string.h>
#include <spa/param/audio/format.h>
#include <spa/pod/filter.h>
#include "alsa-pcm.h"
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#define CHECK_PORT(this,d,p) ((d) == SPA_DIRECTION_INPUT && (p) == 0)
static const char default_device[] = "hw:0";
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static void reset_props(struct props *props)
{
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strncpy(props->device, default_device, 64);
props->use_chmap = DEFAULT_USE_CHMAP;
}
static void emit_node_info(struct state *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) {
struct spa_dict_item items[7];
uint32_t i, n_items = 0;
char latency[64], period[64], nperiods[64], headroom[64];
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_DEVICE_API, "alsa");
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_MEDIA_CLASS, "Audio/Sink");
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_NODE_DRIVER, "true");
if (this->have_format) {
snprintf(latency, sizeof(latency), "%lu/%d", this->buffer_frames / 2, this->rate);
items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_NODE_MAX_LATENCY, latency);
snprintf(period, sizeof(period), "%lu", this->period_frames);
items[n_items++] = SPA_DICT_ITEM_INIT("api.alsa.period-size", period);
snprintf(nperiods, sizeof(nperiods), "%lu",
this->period_frames != 0 ? this->buffer_frames / this->period_frames : 0);
items[n_items++] = SPA_DICT_ITEM_INIT("api.alsa.period-num", nperiods);
snprintf(headroom, sizeof(headroom), "%u", this->headroom);
items[n_items++] = SPA_DICT_ITEM_INIT("api.alsa.headroom", headroom);
}
this->info.props = &SPA_DICT_INIT(items, n_items);
if (this->info.change_mask & SPA_NODE_CHANGE_MASK_PARAMS) {
for (i = 0; i < this->info.n_params; i++) {
if (this->params[i].user > 0) {
this->params[i].flags ^= SPA_PARAM_INFO_SERIAL;
this->params[i].user = 0;
}
}
}
spa_node_emit_info(&this->hooks, &this->info);
this->info.change_mask = old;
}
}
static void emit_port_info(struct state *this, bool full)
{
uint64_t old = full ? this->port_info.change_mask : 0;
if (full)
this->port_info.change_mask = this->port_info_all;
if (this->port_info.change_mask) {
uint32_t i;
if (this->port_info.change_mask & SPA_PORT_CHANGE_MASK_PARAMS) {
for (i = 0; i < this->port_info.n_params; i++) {
if (this->port_params[i].user > 0) {
this->port_params[i].flags ^= SPA_PARAM_INFO_SERIAL;
this->port_params[i].user = 0;
}
}
}
spa_node_emit_port_info(&this->hooks,
SPA_DIRECTION_INPUT, 0, &this->port_info);
this->port_info.change_mask = old;
}
}
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 state *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;
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spa_return_val_if_fail(this != NULL, -EINVAL);
spa_return_val_if_fail(num != 0, -EINVAL);
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result.id = id;
result.next = start;
next:
result.index = result.next++;
spa_pod_builder_init(&b, buffer, sizeof(buffer));
switch (id) {
case SPA_PARAM_PropInfo:
{
struct props *p = &this->props;
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_device),
SPA_PROP_INFO_name, SPA_POD_String(SPA_KEY_API_ALSA_PATH),
SPA_PROP_INFO_description, SPA_POD_String("The ALSA device"),
SPA_PROP_INFO_type, SPA_POD_Stringn(p->device, sizeof(p->device)));
break;
case 1:
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_PropInfo, id,
SPA_PROP_INFO_id, SPA_POD_Id(SPA_PROP_deviceName),
SPA_PROP_INFO_description, SPA_POD_String("The ALSA device name"),
SPA_PROP_INFO_type, SPA_POD_Stringn(p->device_name, sizeof(p->device_name)));
break;
case 2:
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_PropInfo, id,
SPA_PROP_INFO_id, SPA_POD_Id(SPA_PROP_cardName),
SPA_PROP_INFO_description, SPA_POD_String("The ALSA card name"),
SPA_PROP_INFO_type, SPA_POD_Stringn(p->card_name, sizeof(p->card_name)));
break;
case 3:
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_PropInfo, id,
SPA_PROP_INFO_id, SPA_POD_Id(SPA_PROP_latencyOffsetNsec),
SPA_PROP_INFO_description, SPA_POD_String("Latency offset (ns)"),
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SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Long(0LL, 0LL, 2 * SPA_NSEC_PER_SEC));
break;
case 4:
if (!this->is_iec958 && !this->is_hdmi)
goto next;
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_PropInfo, id,
SPA_PROP_INFO_id, SPA_POD_Id(SPA_PROP_iec958Codecs),
SPA_PROP_INFO_name, SPA_POD_String("iec958.codecs"),
SPA_PROP_INFO_description, SPA_POD_String("Enabled IEC958 (S/PDIF) codecs"),
SPA_PROP_INFO_type, SPA_POD_Id(SPA_AUDIO_IEC958_CODEC_UNKNOWN),
SPA_PROP_INFO_params, SPA_POD_Bool(true),
SPA_PROP_INFO_container, SPA_POD_Id(SPA_TYPE_Array));
break;
default:
param = spa_alsa_enum_propinfo(this, result.index - 5, &b);
if (param == NULL)
return 0;
}
break;
}
case SPA_PARAM_Props:
{
struct props *p = &this->props;
struct spa_pod_frame f;
uint32_t codecs[16], n_codecs;
switch (result.index) {
case 0:
spa_pod_builder_push_object(&b, &f,
SPA_TYPE_OBJECT_Props, id);
spa_pod_builder_add(&b,
SPA_PROP_device, SPA_POD_Stringn(p->device, sizeof(p->device)),
SPA_PROP_deviceName, SPA_POD_Stringn(p->device_name, sizeof(p->device_name)),
SPA_PROP_cardName, SPA_POD_Stringn(p->card_name, sizeof(p->card_name)),
SPA_PROP_latencyOffsetNsec, SPA_POD_Long(this->process_latency.ns),
0);
if (this->is_iec958 || this->is_hdmi) {
n_codecs = spa_alsa_get_iec958_codecs(this, codecs, SPA_N_ELEMENTS(codecs));
spa_pod_builder_prop(&b, SPA_PROP_iec958Codecs, 0);
spa_pod_builder_array(&b, sizeof(uint32_t), SPA_TYPE_Id,
n_codecs, codecs);
}
spa_alsa_add_prop_params(this, &b);
param = spa_pod_builder_pop(&b, &f);
break;
default:
return 0;
}
break;
}
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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_Clock),
SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_clock)));
break;
case 1:
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_ParamIO, id,
SPA_PARAM_IO_id, SPA_POD_Id(SPA_IO_Position),
SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_position)));
break;
default:
return 0;
}
break;
case SPA_PARAM_ProcessLatency:
switch (result.index) {
case 0:
param = spa_process_latency_build(&b, id, &this->process_latency);
break;
default:
return 0;
}
break;
default:
return -ENOENT;
}
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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 state *this = object;
spa_return_val_if_fail(this != NULL, -EINVAL);
switch (id) {
case SPA_IO_Clock:
this->clock = data;
break;
case SPA_IO_Position:
this->position = data;
break;
default:
return -ENOENT;
}
spa_alsa_reassign_follower(this);
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return 0;
}
static void handle_process_latency(struct state *this,
const struct spa_process_latency_info *info)
{
bool ns_changed = this->process_latency.ns != info->ns;
if (this->process_latency.quantum == info->quantum &&
this->process_latency.rate == info->rate &&
!ns_changed)
return;
this->process_latency = *info;
this->info.change_mask |= SPA_NODE_CHANGE_MASK_PARAMS;
if (ns_changed)
this->params[NODE_Props].user++;
this->params[NODE_ProcessLatency].user++;
this->port_info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
this->port_params[PORT_Latency].user++;
}
static int impl_node_set_param(void *object, uint32_t id, uint32_t flags,
const struct spa_pod *param)
{
struct state *this = object;
int res;
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spa_return_val_if_fail(this != NULL, -EINVAL);
switch (id) {
case SPA_PARAM_Props:
{
struct props *p = &this->props;
struct spa_pod *iec958_codecs = NULL, *params = NULL;
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int64_t lat_ns = -1;
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if (param == NULL) {
reset_props(p);
return 0;
}
spa_pod_parse_object(param,
SPA_TYPE_OBJECT_Props, NULL,
SPA_PROP_device, SPA_POD_OPT_Stringn(p->device, sizeof(p->device)),
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SPA_PROP_latencyOffsetNsec, SPA_POD_OPT_Long(&lat_ns),
SPA_PROP_iec958Codecs, SPA_POD_OPT_Pod(&iec958_codecs),
SPA_PROP_params, SPA_POD_OPT_Pod(&params));
if ((this->is_iec958 || this->is_hdmi) && iec958_codecs != NULL) {
uint32_t i, codecs[16], n_codecs;
n_codecs = spa_pod_copy_array(iec958_codecs, SPA_TYPE_Id,
codecs, SPA_N_ELEMENTS(codecs));
this->iec958_codecs = 1ULL << SPA_AUDIO_IEC958_CODEC_PCM;
for (i = 0; i < n_codecs; i++)
this->iec958_codecs |= 1ULL << codecs[i];
this->info.change_mask |= SPA_NODE_CHANGE_MASK_PARAMS;
this->params[NODE_Props].user++;
this->port_info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
this->port_params[PORT_EnumFormat].user++;
}
spa_alsa_parse_prop_params(this, params);
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if (lat_ns != -1) {
struct spa_process_latency_info info;
info = this->process_latency;
info.ns = lat_ns;
handle_process_latency(this, &info);
}
emit_node_info(this, false);
emit_port_info(this, false);
break;
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}
case SPA_PARAM_ProcessLatency:
{
struct spa_process_latency_info info;
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if (param == NULL)
spa_zero(info);
else if ((res = spa_process_latency_parse(param, &info)) < 0)
return res;
handle_process_latency(this, &info);
emit_node_info(this, false);
emit_port_info(this, false);
break;
}
default:
return -ENOENT;
}
return 0;
}
static int impl_node_send_command(void *object, const struct spa_command *command)
{
struct state *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_ParamBegin:
if ((res = spa_alsa_open(this, NULL)) < 0)
return res;
break;
case SPA_NODE_COMMAND_ParamEnd:
if (this->have_format)
return 0;
if ((res = spa_alsa_close(this)) < 0)
return res;
break;
case SPA_NODE_COMMAND_Start:
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if (!this->have_format)
return -EIO;
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if (this->n_buffers == 0)
return -EIO;
if ((res = spa_alsa_start(this)) < 0)
return res;
break;
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case SPA_NODE_COMMAND_Suspend:
case SPA_NODE_COMMAND_Pause:
if ((res = spa_alsa_pause(this)) < 0)
return res;
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 state *this = object;
struct spa_hook_list save;
spa_return_val_if_fail(this != NULL, -EINVAL);
spa_hook_list_isolate(&this->hooks, &save, listener, events, data);
emit_node_info(this, true);
emit_port_info(this, 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 *data)
{
struct state *this = object;
spa_return_val_if_fail(this != NULL, -EINVAL);
this->callbacks = SPA_CALLBACKS_INIT(callbacks, data);
return 0;
}
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static int
impl_node_sync(void *object, int seq)
{
struct state *this = object;
spa_return_val_if_fail(this != NULL, -EINVAL);
spa_node_emit_result(&this->hooks, seq, 0, 0, NULL);
return 0;
}
static int impl_node_add_port(void *object, enum spa_direction direction, uint32_t port_id,
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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
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 state *this = object;
struct spa_pod *param;
struct spa_pod_builder b = { 0 };
uint8_t buffer[1024];
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);
spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -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_EnumFormat:
return spa_alsa_enum_format(this, seq, start, num, filter);
case SPA_PARAM_Format:
if (!this->have_format)
return -EIO;
if (result.index > 0)
return 0;
switch (this->current_format.media_subtype) {
case SPA_MEDIA_SUBTYPE_raw:
param = spa_format_audio_raw_build(&b, id,
&this->current_format.info.raw);
break;
case SPA_MEDIA_SUBTYPE_iec958:
param = spa_format_audio_iec958_build(&b, id,
&this->current_format.info.iec958);
break;
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case SPA_MEDIA_SUBTYPE_dsd:
param = spa_format_audio_dsd_build(&b, id,
&this->current_format.info.dsd);
break;
default:
return -EIO;
}
break;
case SPA_PARAM_Buffers:
if (!this->have_format)
return -EIO;
if (result.index > 0)
return 0;
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),
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SPA_PARAM_BUFFERS_blocks, SPA_POD_Int(this->blocks),
SPA_PARAM_BUFFERS_size, SPA_POD_CHOICE_RANGE_Int(
this->quantum_limit * this->frame_size * this->frame_scale,
16 * this->frame_size * this->frame_scale,
INT32_MAX),
SPA_PARAM_BUFFERS_stride, SPA_POD_Int(this->frame_size));
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;
case 1:
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_ParamIO, id,
SPA_PARAM_IO_id, SPA_POD_Id(SPA_IO_RateMatch),
SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_rate_match)));
break;
default:
return 0;
}
break;
case SPA_PARAM_Latency:
switch (result.index) {
case 0: case 1:
{
struct spa_latency_info latency = this->latency[result.index];
if (latency.direction == SPA_DIRECTION_INPUT)
spa_process_latency_info_add(&this->process_latency, &latency);
param = spa_latency_build(&b, id, &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 state *this)
{
if (this->n_buffers > 0) {
spa_list_init(&this->ready);
this->n_buffers = 0;
}
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 state *this = object;
int err = 0;
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if (format == NULL) {
if (!this->have_format)
return 0;
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spa_log_debug(this->log, "clear format");
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spa_alsa_close(this);
clear_buffers(this);
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} else {
struct spa_audio_info info = { 0 };
if ((err = spa_format_parse(format, &info.media_type, &info.media_subtype)) < 0)
return err;
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if (info.media_type != SPA_MEDIA_TYPE_audio)
return -EINVAL;
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switch (info.media_subtype) {
case SPA_MEDIA_SUBTYPE_raw:
if (spa_format_audio_raw_parse(format, &info.info.raw) < 0)
return -EINVAL;
break;
case SPA_MEDIA_SUBTYPE_iec958:
if (spa_format_audio_iec958_parse(format, &info.info.iec958) < 0)
return -EINVAL;
break;
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case SPA_MEDIA_SUBTYPE_dsd:
if (spa_format_audio_dsd_parse(format, &info.info.dsd) < 0)
return -EINVAL;
break;
default:
return -EINVAL;
}
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if ((err = spa_alsa_set_format(this, &info, flags)) < 0)
return err;
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this->current_format = info;
}
this->info.change_mask |= SPA_NODE_CHANGE_MASK_PROPS;
emit_node_info(this, false);
this->port_info.change_mask |= SPA_PORT_CHANGE_MASK_RATE;
this->port_info.rate = SPA_FRACTION(1, this->rate);
this->port_info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
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if (this->have_format) {
this->port_params[PORT_Format] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_READWRITE);
this->port_params[PORT_Buffers] = SPA_PARAM_INFO(SPA_PARAM_Buffers, SPA_PARAM_INFO_READ);
this->port_params[PORT_Latency].user++;
} else {
this->port_params[PORT_Format] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
this->port_params[PORT_Buffers] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
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}
emit_port_info(this, false);
return err;
}
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 state *this = object;
int res;
spa_return_val_if_fail(this != NULL, -EINVAL);
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spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
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switch (id) {
case SPA_PARAM_Format:
res = port_set_format(this, direction, port_id, flags, param);
break;
case SPA_PARAM_Latency:
{
struct spa_latency_info info;
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if (param == NULL)
info = SPA_LATENCY_INFO(SPA_DIRECTION_REVERSE(direction));
else if ((res = spa_latency_parse(param, &info)) < 0)
return res;
if (direction == info.direction)
return -EINVAL;
this->latency[info.direction] = info;
this->port_info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
this->port_params[PORT_Latency].user++;
emit_port_info(this, false);
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res = 0;
break;
}
default:
res = -ENOENT;
break;
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}
return res;
}
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 state *this = object;
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uint32_t i;
int res;
spa_return_val_if_fail(this != NULL, -EINVAL);
spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
spa_log_debug(this->log, "%p: use %d buffers", this, n_buffers);
if (this->n_buffers > 0) {
spa_alsa_pause(this);
if ((res = clear_buffers(this)) < 0)
return res;
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}
if (n_buffers > 0 && !this->have_format)
return -EIO;
if (n_buffers > MAX_BUFFERS)
return -ENOSPC;
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for (i = 0; i < n_buffers; i++) {
struct buffer *b = &this->buffers[i];
struct spa_data *d = buffers[i]->datas;
b->buf = buffers[i];
b->id = i;
b->flags = BUFFER_FLAG_OUT;
b->h = spa_buffer_find_meta_data(b->buf, SPA_META_Header, sizeof(*b->h));
if (d[0].data == NULL) {
spa_log_error(this->log, "%p: need mapped memory", this);
return -EINVAL;
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}
spa_log_debug(this->log, "%p: %d %p data:%p", this, i, b->buf, d[0].data);
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}
this->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 state *this = object;
spa_return_val_if_fail(this != NULL, -EINVAL);
spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
spa_log_debug(this->log, "%p: io %d %p %zd", this, id, data, size);
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switch (id) {
case SPA_IO_Buffers:
this->io = data;
break;
case SPA_IO_RateMatch:
this->rate_match = data;
spa_alsa_update_rate_match(this);
break;
default:
return -ENOENT;
}
return 0;
}
static int impl_node_port_reuse_buffer(void *object, uint32_t port_id, uint32_t buffer_id)
{
return -ENOTSUP;
}
static int impl_node_process(void *object)
{
struct state *this = object;
struct spa_io_buffers *io;
spa_return_val_if_fail(this != NULL, -EINVAL);
if ((io = this->io) == NULL)
return -EIO;
spa_log_trace_fp(this->log, "%p: process %d %d/%d", this, io->status,
io->buffer_id, this->n_buffers);
if (this->position && this->position->clock.flags & SPA_IO_CLOCK_FLAG_FREEWHEEL) {
io->status = SPA_STATUS_NEED_DATA;
return SPA_STATUS_HAVE_DATA;
}
if (io->status == SPA_STATUS_HAVE_DATA &&
io->buffer_id < this->n_buffers) {
struct buffer *b = &this->buffers[io->buffer_id];
if (!SPA_FLAG_IS_SET(b->flags, BUFFER_FLAG_OUT)) {
spa_log_warn(this->log, "%p: buffer %u in use",
this, io->buffer_id);
io->status = -EINVAL;
return -EINVAL;
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}
spa_log_trace_fp(this->log, "%p: queue buffer %u", this, io->buffer_id);
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spa_list_append(&this->ready, &b->link);
SPA_FLAG_CLEAR(b->flags, BUFFER_FLAG_OUT);
io->buffer_id = SPA_ID_INVALID;
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spa_alsa_write(this);
io->status = SPA_STATUS_OK;
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}
else if (!spa_list_is_empty(&this->ready)) {
spa_alsa_write(this);
io->status = SPA_STATUS_OK;
}
return SPA_STATUS_HAVE_DATA;
}
static const struct spa_node_methods impl_node = {
SPA_VERSION_NODE_METHODS,
.add_listener = impl_node_add_listener,
.set_callbacks = impl_node_set_callbacks,
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.sync = impl_node_sync,
.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)
{
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struct state *this;
spa_return_val_if_fail(handle != NULL, -EINVAL);
spa_return_val_if_fail(interface != NULL, -EINVAL);
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this = (struct state *) handle;
if (spa_streq(type, SPA_TYPE_INTERFACE_Node))
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*interface = &this->node;
else
return -ENOENT;
return 0;
}
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static int impl_clear(struct spa_handle *handle)
{
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struct state *this;
spa_return_val_if_fail(handle != NULL, -EINVAL);
this = (struct state *) handle;
spa_alsa_close(this);
spa_alsa_clear(this);
return 0;
}
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static size_t
impl_get_size(const struct spa_handle_factory *factory,
const struct spa_dict *params)
{
return sizeof(struct state);
}
static int
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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)
{
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struct state *this;
spa_return_val_if_fail(factory != NULL, -EINVAL);
spa_return_val_if_fail(handle != NULL, -EINVAL);
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handle->get_interface = impl_get_interface;
handle->clear = impl_clear;
this = (struct state *) handle;
this->log = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log);
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alsa_log_topic_init(this->log);
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this->data_system = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_DataSystem);
this->data_loop = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_DataLoop);
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if (this->data_loop == NULL) {
spa_log_error(this->log, "a data loop is needed");
return -EINVAL;
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}
if (this->data_system == NULL) {
spa_log_error(this->log, "a data system is needed");
return -EINVAL;
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}
this->node.iface = SPA_INTERFACE_INIT(
SPA_TYPE_INTERFACE_Node,
SPA_VERSION_NODE,
&impl_node, this);
spa_hook_list_init(&this->hooks);
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this->stream = SND_PCM_STREAM_PLAYBACK;
this->port_direction = SPA_DIRECTION_INPUT;
this->latency[this->port_direction] = SPA_LATENCY_INFO(
this->port_direction,
.min_quantum = 1.0f,
.max_quantum = 1.0f);
this->latency[SPA_DIRECTION_OUTPUT] = SPA_LATENCY_INFO(SPA_DIRECTION_OUTPUT);
this->info_all = SPA_NODE_CHANGE_MASK_FLAGS |
SPA_NODE_CHANGE_MASK_PROPS |
SPA_NODE_CHANGE_MASK_PARAMS;
this->info = SPA_NODE_INFO_INIT();
this->info.max_input_ports = 1;
this->info.flags = SPA_NODE_FLAG_RT;
this->params[NODE_PropInfo] = SPA_PARAM_INFO(SPA_PARAM_PropInfo, SPA_PARAM_INFO_READ);
this->params[NODE_Props] = SPA_PARAM_INFO(SPA_PARAM_Props, SPA_PARAM_INFO_READWRITE);
this->params[NODE_IO] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ);
this->params[NODE_ProcessLatency] = SPA_PARAM_INFO(SPA_PARAM_ProcessLatency, SPA_PARAM_INFO_READWRITE);
this->info.params = this->params;
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this->info.n_params = N_NODE_PARAMS;
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reset_props(&this->props);
this->port_info_all = SPA_PORT_CHANGE_MASK_FLAGS |
SPA_PORT_CHANGE_MASK_PARAMS;
this->port_info = SPA_PORT_INFO_INIT();
this->port_info.flags = SPA_PORT_FLAG_LIVE |
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SPA_PORT_FLAG_PHYSICAL |
SPA_PORT_FLAG_TERMINAL;
this->port_params[PORT_EnumFormat] = SPA_PARAM_INFO(SPA_PARAM_EnumFormat, SPA_PARAM_INFO_READ);
this->port_params[PORT_Meta] = SPA_PARAM_INFO(SPA_PARAM_Meta, SPA_PARAM_INFO_READ);
this->port_params[PORT_IO] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ);
this->port_params[PORT_Format] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
this->port_params[PORT_Buffers] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
this->port_params[PORT_Latency] = SPA_PARAM_INFO(SPA_PARAM_Latency, SPA_PARAM_INFO_READWRITE);
this->port_info.params = this->port_params;
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this->port_info.n_params = N_PORT_PARAMS;
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spa_list_init(&this->ready);
return spa_alsa_init(this, info);
}
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static const struct spa_interface_info impl_interfaces[] = {
{SPA_TYPE_INTERFACE_Node,},
};
static int
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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);
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switch (*index) {
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case 0:
*info = &impl_interfaces[*index];
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break;
default:
return 0;
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}
(*index)++;
return 1;
}
static const struct spa_dict_item info_items[] = {
{ SPA_KEY_FACTORY_AUTHOR, "Wim Taymans <wim.taymans@gmail.com>" },
{ SPA_KEY_FACTORY_DESCRIPTION, "Play audio with the alsa API" },
{ SPA_KEY_FACTORY_USAGE, "["SPA_KEY_API_ALSA_PATH"=<path>]" },
};
static const struct spa_dict info = SPA_DICT_INIT_ARRAY(info_items);
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const struct spa_handle_factory spa_alsa_sink_factory = {
SPA_VERSION_HANDLE_FACTORY,
SPA_NAME_API_ALSA_PCM_SINK,
&info,
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impl_get_size,
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impl_init,
impl_enum_interface_info,
};