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pipewire/spa/plugins/alsa/alsa-pcm.c
Wim Taymans 1547e5fd2b alsa: limit the buffer-size to quantum-limit * 4 
We don't actually need to allocate the largest possible buffer. A buffer
that is near 4 times the quantum-limit is more than enough.

See #1995
2022-04-07 16:01:48 +02:00

2534 lines
74 KiB
C
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sched.h>
#include <errno.h>
#include <getopt.h>
#include <sys/time.h>
#include <math.h>
#include <limits.h>
#include <spa/pod/filter.h>
#include <spa/utils/string.h>
#include <spa/support/system.h>
#include <spa/utils/keys.h>
#include "alsa-pcm.h"
static struct spa_list cards = SPA_LIST_INIT(&cards);
static struct card *find_card(uint32_t index)
{
struct card *c;
spa_list_for_each(c, &cards, link) {
if (c->index == index) {
c->ref++;
return c;
}
}
return NULL;
}
static struct card *ensure_card(uint32_t index, bool ucm)
{
struct card *c;
char card_name[64];
const char *alibpref = NULL;
int err;
if ((c = find_card(index)) != NULL)
return c;
c = calloc(1, sizeof(*c));
c->ref = 1;
c->index = index;
if (ucm) {
snprintf(card_name, sizeof(card_name), "hw:%i", index);
err = snd_use_case_mgr_open(&c->ucm, card_name);
if (err < 0) {
char *name;
err = snd_card_get_name(index, &name);
if (err < 0)
goto error;
snprintf(card_name, sizeof(card_name), "%s", name);
free(name);
err = snd_use_case_mgr_open(&c->ucm, card_name);
if (err < 0)
goto error;
}
if ((snd_use_case_get(c->ucm, "_alibpref", &alibpref) != 0))
alibpref = NULL;
c->ucm_prefix = (char*)alibpref;
}
spa_list_append(&cards, &c->link);
return c;
error:
free(c);
errno = -err;
return NULL;
}
static void release_card(struct card *c)
{
spa_assert(c->ref > 0);
if (--c->ref > 0)
return;
spa_list_remove(&c->link);
if (c->ucm) {
free(c->ucm_prefix);
snd_use_case_mgr_close(c->ucm);
}
free(c);
}
static int alsa_set_param(struct state *state, const char *k, const char *s)
{
int fmt_change = 0;
if (spa_streq(k, SPA_KEY_AUDIO_CHANNELS)) {
state->default_channels = atoi(s);
fmt_change++;
} else if (spa_streq(k, SPA_KEY_AUDIO_RATE)) {
state->default_rate = atoi(s);
fmt_change++;
} else if (spa_streq(k, SPA_KEY_AUDIO_FORMAT)) {
state->default_format = spa_alsa_format_from_name(s, strlen(s));
fmt_change++;
} else if (spa_streq(k, SPA_KEY_AUDIO_POSITION)) {
spa_alsa_parse_position(&state->default_pos, s, strlen(s));
fmt_change++;
} else if (spa_streq(k, SPA_KEY_AUDIO_ALLOWED_RATES)) {
state->n_allowed_rates = spa_alsa_parse_rates(state->allowed_rates,
MAX_RATES, s, strlen(s));
fmt_change++;
} else if (spa_streq(k, "iec958.codecs")) {
spa_alsa_parse_iec958_codecs(&state->iec958_codecs, s, strlen(s));
fmt_change++;
} else if (spa_streq(k, "api.alsa.period-size")) {
state->default_period_size = atoi(s);
} else if (spa_streq(k, "api.alsa.period-num")) {
state->default_period_num = atoi(s);
} else if (spa_streq(k, "api.alsa.headroom")) {
state->default_headroom = atoi(s);
} else if (spa_streq(k, "api.alsa.start-delay")) {
state->default_start_delay = atoi(s);
} else if (spa_streq(k, "api.alsa.disable-mmap")) {
state->disable_mmap = spa_atob(s);
} else if (spa_streq(k, "api.alsa.disable-batch")) {
state->disable_batch = spa_atob(s);
} else if (spa_streq(k, "api.alsa.use-chmap")) {
state->props.use_chmap = spa_atob(s);
} else if (spa_streq(k, "api.alsa.multi-rate")) {
state->multi_rate = spa_atob(s);
} else if (spa_streq(k, "latency.internal.rate")) {
state->process_latency.rate = atoi(s);
} else if (spa_streq(k, "latency.internal.ns")) {
state->process_latency.ns = atoi(s);
} else if (spa_streq(k, "clock.name")) {
spa_scnprintf(state->clock_name,
sizeof(state->clock_name), "%s", s);
} else
return 0;
if (fmt_change > 0) {
state->port_info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
state->port_params[PORT_EnumFormat].user++;
}
return 1;
}
static int position_to_string(struct channel_map *map, char *val, size_t len)
{
uint32_t i, o = 0;
int r;
o += snprintf(val, len, "[ ");
for (i = 0; i < map->channels; i++) {
r = snprintf(val+o, len-o, "%s%s", i == 0 ? "" : ", ",
spa_debug_type_find_short_name(spa_type_audio_channel,
map->pos[i]));
if (r < 0 || o + r >= len)
return -ENOSPC;
o += r;
}
if (len > o)
o += snprintf(val+o, len-o, " ]");
return 0;
}
static int uint32_array_to_string(uint32_t *vals, uint32_t n_vals, char *val, size_t len)
{
uint32_t i, o = 0;
int r;
o += snprintf(val, len, "[ ");
for (i = 0; i < n_vals; i++) {
r = snprintf(val+o, len-o, "%s%d", i == 0 ? "" : ", ", vals[i]);
if (r < 0 || o + r >= len)
return -ENOSPC;
o += r;
}
if (len > o)
o += snprintf(val+o, len-o, " ]");
return 0;
}
struct spa_pod *spa_alsa_enum_propinfo(struct state *state,
uint32_t idx, struct spa_pod_builder *b)
{
struct spa_pod *param;
switch (idx) {
case 0:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String(SPA_KEY_AUDIO_CHANNELS),
SPA_PROP_INFO_description, SPA_POD_String("Audio Channels"),
SPA_PROP_INFO_type, SPA_POD_Int(state->default_channels),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 1:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String(SPA_KEY_AUDIO_RATE),
SPA_PROP_INFO_description, SPA_POD_String("Audio Rate"),
SPA_PROP_INFO_type, SPA_POD_Int(state->default_rate),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 2:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String(SPA_KEY_AUDIO_FORMAT),
SPA_PROP_INFO_description, SPA_POD_String("Audio Format"),
SPA_PROP_INFO_type, SPA_POD_String(
spa_debug_type_find_short_name(spa_type_audio_format,
state->default_format)),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 3:
{
char buf[1024];
position_to_string(&state->default_pos, buf, sizeof(buf));
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String(SPA_KEY_AUDIO_POSITION),
SPA_PROP_INFO_description, SPA_POD_String("Audio Position"),
SPA_PROP_INFO_type, SPA_POD_String(buf),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
}
case 4:
{
char buf[1024];
uint32_array_to_string(state->allowed_rates, state->n_allowed_rates, buf, sizeof(buf));
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String(SPA_KEY_AUDIO_ALLOWED_RATES),
SPA_PROP_INFO_description, SPA_POD_String("Audio Allowed Rates"),
SPA_PROP_INFO_type, SPA_POD_String(buf),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
}
case 5:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String("api.alsa.period-size"),
SPA_PROP_INFO_description, SPA_POD_String("Period Size"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Int(state->default_period_size, 0, 8192),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 6:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String("api.alsa.period-num"),
SPA_PROP_INFO_description, SPA_POD_String("Number of Periods"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Int(state->default_period_num, 0, 1024),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 7:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String("api.alsa.headroom"),
SPA_PROP_INFO_description, SPA_POD_String("Headroom"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Int(state->default_headroom, 0, 8192),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 8:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String("api.alsa.start-delay"),
SPA_PROP_INFO_description, SPA_POD_String("Start Delay"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Int(state->default_start_delay, 0, 8192),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 9:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String("api.alsa.disable-mmap"),
SPA_PROP_INFO_description, SPA_POD_String("Disable MMAP"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(state->disable_mmap),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 10:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String("api.alsa.disable-batch"),
SPA_PROP_INFO_description, SPA_POD_String("Disable Batch"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(state->disable_batch),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 11:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String("api.alsa.use-chmap"),
SPA_PROP_INFO_description, SPA_POD_String("Use the driver channelmap"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(state->props.use_chmap),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 12:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String("api.alsa.multi-rate"),
SPA_PROP_INFO_description, SPA_POD_String("Support multiple rates"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool(state->multi_rate),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 13:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String("latency.internal.rate"),
SPA_PROP_INFO_description, SPA_POD_String("Internal latency in samples"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Int(state->process_latency.rate,
0, 65536),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 14:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String("latency.internal.ns"),
SPA_PROP_INFO_description, SPA_POD_String("Internal latency in nanoseconds"),
SPA_PROP_INFO_type, SPA_POD_CHOICE_RANGE_Long(state->process_latency.ns,
0, 2 * SPA_NSEC_PER_SEC),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
case 15:
param = spa_pod_builder_add_object(b,
SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo,
SPA_PROP_INFO_name, SPA_POD_String("clock.name"),
SPA_PROP_INFO_description, SPA_POD_String("The name of the clock"),
SPA_PROP_INFO_type, SPA_POD_String(state->clock_name),
SPA_PROP_INFO_params, SPA_POD_Bool(true));
break;
default:
return NULL;
}
return param;
}
int spa_alsa_add_prop_params(struct state *state, struct spa_pod_builder *b)
{
struct spa_pod_frame f[1];
char buf[1024];
spa_pod_builder_prop(b, SPA_PROP_params, 0);
spa_pod_builder_push_struct(b, &f[0]);
spa_pod_builder_string(b, SPA_KEY_AUDIO_CHANNELS);
spa_pod_builder_int(b, state->default_channels);
spa_pod_builder_string(b, SPA_KEY_AUDIO_RATE);
spa_pod_builder_int(b, state->default_rate);
spa_pod_builder_string(b, SPA_KEY_AUDIO_FORMAT);
spa_pod_builder_string(b,
spa_debug_type_find_short_name(spa_type_audio_format,
state->default_format));
position_to_string(&state->default_pos, buf, sizeof(buf));
spa_pod_builder_string(b, SPA_KEY_AUDIO_POSITION);
spa_pod_builder_string(b, buf);
uint32_array_to_string(state->allowed_rates, state->n_allowed_rates,
buf, sizeof(buf));
spa_pod_builder_string(b, SPA_KEY_AUDIO_ALLOWED_RATES);
spa_pod_builder_string(b, buf);
spa_pod_builder_string(b, "api.alsa.period-size");
spa_pod_builder_int(b, state->default_period_size);
spa_pod_builder_string(b, "api.alsa.period-num");
spa_pod_builder_int(b, state->default_period_num);
spa_pod_builder_string(b, "api.alsa.headroom");
spa_pod_builder_int(b, state->default_headroom);
spa_pod_builder_string(b, "api.alsa.start-delay");
spa_pod_builder_int(b, state->default_start_delay);
spa_pod_builder_string(b, "api.alsa.disable-mmap");
spa_pod_builder_bool(b, state->disable_mmap);
spa_pod_builder_string(b, "api.alsa.disable-batch");
spa_pod_builder_bool(b, state->disable_batch);
spa_pod_builder_string(b, "api.alsa.use-chmap");
spa_pod_builder_bool(b, state->props.use_chmap);
spa_pod_builder_string(b, "api.alsa.multi-rate");
spa_pod_builder_bool(b, state->multi_rate);
spa_pod_builder_string(b, "latency.internal.rate");
spa_pod_builder_int(b, state->process_latency.rate);
spa_pod_builder_string(b, "latency.internal.ns");
spa_pod_builder_long(b, state->process_latency.ns);
spa_pod_builder_string(b, "clock.name");
spa_pod_builder_string(b, state->clock_name);
spa_pod_builder_pop(b, &f[0]);
return 0;
}
int spa_alsa_parse_prop_params(struct state *state, struct spa_pod *params)
{
struct spa_pod_parser prs;
struct spa_pod_frame f;
int changed = 0;
if (params == NULL)
return 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_int(pod)) {
snprintf(value, sizeof(value), "%d",
SPA_POD_VALUE(struct spa_pod_int, pod));
} else if (spa_pod_is_long(pod)) {
snprintf(value, sizeof(value), "%"PRIi64,
SPA_POD_VALUE(struct spa_pod_long, pod));
} else if (spa_pod_is_bool(pod)) {
snprintf(value, sizeof(value), "%s",
SPA_POD_VALUE(struct spa_pod_bool, pod) ?
"true" : "false");
} else
continue;
spa_log_info(state->log, "key:'%s' val:'%s'", name, value);
alsa_set_param(state, name, value);
changed++;
}
if (changed > 0) {
state->info.change_mask |= SPA_NODE_CHANGE_MASK_PARAMS;
state->params[NODE_Props].user++;
}
return changed;
}
int spa_alsa_init(struct state *state, const struct spa_dict *info)
{
uint32_t i;
snd_config_update_free_global();
state->multi_rate = true;
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, SPA_KEY_API_ALSA_PATH)) {
snprintf(state->props.device, 63, "%s", s);
} else if (spa_streq(k, SPA_KEY_API_ALSA_PCM_CARD)) {
state->card_index = atoi(s);
} else if (spa_streq(k, SPA_KEY_API_ALSA_OPEN_UCM)) {
state->open_ucm = spa_atob(s);
} else if (spa_streq(k, "clock.quantum-limit")) {
spa_atou32(s, &state->quantum_limit, 0);
} else {
alsa_set_param(state, k, s);
}
}
if (state->clock_name[0] == '\0')
snprintf(state->clock_name, sizeof(state->clock_name),
"api.alsa.%u", state->card_index);
if (state->stream == SND_PCM_STREAM_PLAYBACK) {
state->is_iec958 = spa_strstartswith(state->props.device, "iec958");
state->is_hdmi = spa_strstartswith(state->props.device, "hdmi");
state->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_PCM;
}
state->card = ensure_card(state->card_index, state->open_ucm);
if (state->card == NULL) {
spa_log_error(state->log, "can't create card %u", state->card_index);
return -errno;
}
return 0;
}
int spa_alsa_clear(struct state *state)
{
release_card(state->card);
state->card = NULL;
state->card_index = SPA_ID_INVALID;
return 0;
}
#define CHECK(s,msg,...) if ((err = (s)) < 0) { spa_log_error(state->log, msg ": %s", ##__VA_ARGS__, snd_strerror(err)); return err; }
int spa_alsa_open(struct state *state, const char *params)
{
int err;
struct props *props = &state->props;
char device_name[256];
if (state->opened)
return 0;
CHECK(snd_output_stdio_attach(&state->output, stderr, 0), "attach failed");
spa_scnprintf(device_name, sizeof(device_name), "%s%s%s",
state->card->ucm_prefix ? state->card->ucm_prefix : "",
props->device, params ? params : "");
spa_log_info(state->log, "%p: ALSA device open '%s' %s", state, device_name,
state->stream == SND_PCM_STREAM_CAPTURE ? "capture" : "playback");
CHECK(snd_pcm_open(&state->hndl,
device_name,
state->stream,
SND_PCM_NONBLOCK |
SND_PCM_NO_AUTO_RESAMPLE |
SND_PCM_NO_AUTO_CHANNELS | SND_PCM_NO_AUTO_FORMAT), "'%s': %s open failed",
device_name,
state->stream == SND_PCM_STREAM_CAPTURE ? "capture" : "playback");
if ((err = spa_system_timerfd_create(state->data_system,
CLOCK_MONOTONIC, SPA_FD_CLOEXEC | SPA_FD_NONBLOCK)) < 0)
goto error_exit_close;
state->timerfd = err;
if (state->clock)
spa_scnprintf(state->clock->name, sizeof(state->clock->name),
"%s", state->clock_name);
state->opened = true;
state->sample_count = 0;
state->sample_time = 0;
return 0;
error_exit_close:
snd_pcm_close(state->hndl);
return err;
}
int spa_alsa_close(struct state *state)
{
int err = 0;
if (!state->opened)
return 0;
spa_alsa_pause(state);
spa_log_info(state->log, "%p: Device '%s' closing", state, state->props.device);
if ((err = snd_pcm_close(state->hndl)) < 0)
spa_log_warn(state->log, "%s: close failed: %s", state->props.device,
snd_strerror(err));
if ((err = snd_output_close(state->output)) < 0)
spa_log_warn(state->log, "output close failed: %s", snd_strerror(err));
spa_system_close(state->data_system, state->timerfd);
if (state->have_format)
state->card->format_ref--;
state->have_format = false;
state->opened = false;
return err;
}
struct format_info {
uint32_t spa_format;
uint32_t spa_pformat;
snd_pcm_format_t format;
};
static const struct format_info format_info[] = {
{ SPA_AUDIO_FORMAT_UNKNOWN, SPA_AUDIO_FORMAT_UNKNOWN, SND_PCM_FORMAT_UNKNOWN},
{ SPA_AUDIO_FORMAT_F32_LE, SPA_AUDIO_FORMAT_F32P, SND_PCM_FORMAT_FLOAT_LE},
{ SPA_AUDIO_FORMAT_F32_BE, SPA_AUDIO_FORMAT_F32P, SND_PCM_FORMAT_FLOAT_BE},
{ SPA_AUDIO_FORMAT_S32_LE, SPA_AUDIO_FORMAT_S32P, SND_PCM_FORMAT_S32_LE},
{ SPA_AUDIO_FORMAT_S32_BE, SPA_AUDIO_FORMAT_S32P, SND_PCM_FORMAT_S32_BE},
{ SPA_AUDIO_FORMAT_S24_32_LE, SPA_AUDIO_FORMAT_S24_32P, SND_PCM_FORMAT_S24_LE},
{ SPA_AUDIO_FORMAT_S24_32_BE, SPA_AUDIO_FORMAT_S24_32P, SND_PCM_FORMAT_S24_BE},
{ SPA_AUDIO_FORMAT_S24_LE, SPA_AUDIO_FORMAT_S24P, SND_PCM_FORMAT_S24_3LE},
{ SPA_AUDIO_FORMAT_S24_BE, SPA_AUDIO_FORMAT_S24P, SND_PCM_FORMAT_S24_3BE},
{ SPA_AUDIO_FORMAT_S16_LE, SPA_AUDIO_FORMAT_S16P, SND_PCM_FORMAT_S16_LE},
{ SPA_AUDIO_FORMAT_S16_BE, SPA_AUDIO_FORMAT_S16P, SND_PCM_FORMAT_S16_BE},
{ SPA_AUDIO_FORMAT_S8, SPA_AUDIO_FORMAT_UNKNOWN, SND_PCM_FORMAT_S8},
{ SPA_AUDIO_FORMAT_U8, SPA_AUDIO_FORMAT_U8P, SND_PCM_FORMAT_U8},
{ SPA_AUDIO_FORMAT_U16_LE, SPA_AUDIO_FORMAT_UNKNOWN, SND_PCM_FORMAT_U16_LE},
{ SPA_AUDIO_FORMAT_U16_BE, SPA_AUDIO_FORMAT_UNKNOWN, SND_PCM_FORMAT_U16_BE},
{ SPA_AUDIO_FORMAT_U24_32_LE, SPA_AUDIO_FORMAT_UNKNOWN, SND_PCM_FORMAT_U24_LE},
{ SPA_AUDIO_FORMAT_U24_32_BE, SPA_AUDIO_FORMAT_UNKNOWN, SND_PCM_FORMAT_U24_BE},
{ SPA_AUDIO_FORMAT_U24_LE, SPA_AUDIO_FORMAT_UNKNOWN, SND_PCM_FORMAT_U24_3LE},
{ SPA_AUDIO_FORMAT_U24_BE, SPA_AUDIO_FORMAT_UNKNOWN, SND_PCM_FORMAT_U24_3BE},
{ SPA_AUDIO_FORMAT_U32_LE, SPA_AUDIO_FORMAT_UNKNOWN, SND_PCM_FORMAT_U32_LE},
{ SPA_AUDIO_FORMAT_U32_BE, SPA_AUDIO_FORMAT_UNKNOWN, SND_PCM_FORMAT_U32_BE},
{ SPA_AUDIO_FORMAT_F64_LE, SPA_AUDIO_FORMAT_F64P, SND_PCM_FORMAT_FLOAT64_LE},
{ SPA_AUDIO_FORMAT_F64_BE, SPA_AUDIO_FORMAT_F64P, SND_PCM_FORMAT_FLOAT64_BE},
};
static snd_pcm_format_t spa_format_to_alsa(uint32_t format, bool *planar)
{
size_t i;
for (i = 0; i < SPA_N_ELEMENTS(format_info); i++) {
*planar = format_info[i].spa_pformat == format;
if (format_info[i].spa_format == format || *planar)
return format_info[i].format;
}
return SND_PCM_FORMAT_UNKNOWN;
}
struct chmap_info {
enum snd_pcm_chmap_position pos;
enum spa_audio_channel channel;
};
static const struct chmap_info chmap_info[] = {
[SND_CHMAP_UNKNOWN] = { SND_CHMAP_UNKNOWN, SPA_AUDIO_CHANNEL_UNKNOWN },
[SND_CHMAP_NA] = { SND_CHMAP_NA, SPA_AUDIO_CHANNEL_NA },
[SND_CHMAP_MONO] = { SND_CHMAP_MONO, SPA_AUDIO_CHANNEL_MONO },
[SND_CHMAP_FL] = { SND_CHMAP_FL, SPA_AUDIO_CHANNEL_FL },
[SND_CHMAP_FR] = { SND_CHMAP_FR, SPA_AUDIO_CHANNEL_FR },
[SND_CHMAP_RL] = { SND_CHMAP_RL, SPA_AUDIO_CHANNEL_RL },
[SND_CHMAP_RR] = { SND_CHMAP_RR, SPA_AUDIO_CHANNEL_RR },
[SND_CHMAP_FC] = { SND_CHMAP_FC, SPA_AUDIO_CHANNEL_FC },
[SND_CHMAP_LFE] = { SND_CHMAP_LFE, SPA_AUDIO_CHANNEL_LFE },
[SND_CHMAP_SL] = { SND_CHMAP_SL, SPA_AUDIO_CHANNEL_SL },
[SND_CHMAP_SR] = { SND_CHMAP_SR, SPA_AUDIO_CHANNEL_SR },
[SND_CHMAP_RC] = { SND_CHMAP_RC, SPA_AUDIO_CHANNEL_RC },
[SND_CHMAP_FLC] = { SND_CHMAP_FLC, SPA_AUDIO_CHANNEL_FLC },
[SND_CHMAP_FRC] = { SND_CHMAP_FRC, SPA_AUDIO_CHANNEL_FRC },
[SND_CHMAP_RLC] = { SND_CHMAP_RLC, SPA_AUDIO_CHANNEL_RLC },
[SND_CHMAP_RRC] = { SND_CHMAP_RRC, SPA_AUDIO_CHANNEL_RRC },
[SND_CHMAP_FLW] = { SND_CHMAP_FLW, SPA_AUDIO_CHANNEL_FLW },
[SND_CHMAP_FRW] = { SND_CHMAP_FRW, SPA_AUDIO_CHANNEL_FRW },
[SND_CHMAP_FLH] = { SND_CHMAP_FLH, SPA_AUDIO_CHANNEL_FLH },
[SND_CHMAP_FCH] = { SND_CHMAP_FCH, SPA_AUDIO_CHANNEL_FCH },
[SND_CHMAP_FRH] = { SND_CHMAP_FRH, SPA_AUDIO_CHANNEL_FRH },
[SND_CHMAP_TC] = { SND_CHMAP_TC, SPA_AUDIO_CHANNEL_TC },
[SND_CHMAP_TFL] = { SND_CHMAP_TFL, SPA_AUDIO_CHANNEL_TFL },
[SND_CHMAP_TFR] = { SND_CHMAP_TFR, SPA_AUDIO_CHANNEL_TFR },
[SND_CHMAP_TFC] = { SND_CHMAP_TFC, SPA_AUDIO_CHANNEL_TFC },
[SND_CHMAP_TRL] = { SND_CHMAP_TRL, SPA_AUDIO_CHANNEL_TRL },
[SND_CHMAP_TRR] = { SND_CHMAP_TRR, SPA_AUDIO_CHANNEL_TRR },
[SND_CHMAP_TRC] = { SND_CHMAP_TRC, SPA_AUDIO_CHANNEL_TRC },
[SND_CHMAP_TFLC] = { SND_CHMAP_TFLC, SPA_AUDIO_CHANNEL_TFLC },
[SND_CHMAP_TFRC] = { SND_CHMAP_TFRC, SPA_AUDIO_CHANNEL_TFRC },
[SND_CHMAP_TSL] = { SND_CHMAP_TSL, SPA_AUDIO_CHANNEL_TSL },
[SND_CHMAP_TSR] = { SND_CHMAP_TSR, SPA_AUDIO_CHANNEL_TSR },
[SND_CHMAP_LLFE] = { SND_CHMAP_LLFE, SPA_AUDIO_CHANNEL_LLFE },
[SND_CHMAP_RLFE] = { SND_CHMAP_RLFE, SPA_AUDIO_CHANNEL_RLFE },
[SND_CHMAP_BC] = { SND_CHMAP_BC, SPA_AUDIO_CHANNEL_BC },
[SND_CHMAP_BLC] = { SND_CHMAP_BLC, SPA_AUDIO_CHANNEL_BLC },
[SND_CHMAP_BRC] = { SND_CHMAP_BRC, SPA_AUDIO_CHANNEL_BRC },
};
#define _M(ch) (1LL << SND_CHMAP_ ##ch)
struct def_mask {
int channels;
uint64_t mask;
};
static const struct def_mask default_layouts[] = {
{ 0, 0 },
{ 1, _M(MONO) },
{ 2, _M(FL) | _M(FR) },
{ 3, _M(FL) | _M(FR) | _M(LFE) },
{ 4, _M(FL) | _M(FR) | _M(RL) |_M(RR) },
{ 5, _M(FL) | _M(FR) | _M(RL) |_M(RR) | _M(FC) },
{ 6, _M(FL) | _M(FR) | _M(RL) |_M(RR) | _M(FC) | _M(LFE) },
{ 7, _M(FL) | _M(FR) | _M(RL) |_M(RR) | _M(SL) | _M(SR) | _M(FC) },
{ 8, _M(FL) | _M(FR) | _M(RL) |_M(RR) | _M(SL) | _M(SR) | _M(FC) | _M(LFE) },
};
#define _C(ch) (SPA_AUDIO_CHANNEL_ ##ch)
static const struct channel_map default_map[] = {
{ 0, { 0, } } ,
{ 1, { _C(MONO), } },
{ 2, { _C(FL), _C(FR), } },
{ 3, { _C(FL), _C(FR), _C(LFE) } },
{ 4, { _C(FL), _C(FR), _C(RL), _C(RR), } },
{ 5, { _C(FL), _C(FR), _C(RL), _C(RR), _C(FC) } },
{ 6, { _C(FL), _C(FR), _C(RL), _C(RR), _C(FC), _C(LFE), } },
{ 7, { _C(FL), _C(FR), _C(RL), _C(RR), _C(FC), _C(SL), _C(SR), } },
{ 8, { _C(FL), _C(FR), _C(RL), _C(RR), _C(FC), _C(LFE), _C(SL), _C(SR), } },
};
static enum spa_audio_channel chmap_position_to_channel(enum snd_pcm_chmap_position pos)
{
return chmap_info[pos].channel;
}
static void sanitize_map(snd_pcm_chmap_t* map)
{
uint64_t mask = 0, p, dup = 0;
const struct def_mask *def;
uint32_t i, j, pos;
for (i = 0; i < map->channels; i++) {
if (map->pos[i] > SND_CHMAP_LAST)
map->pos[i] = SND_CHMAP_UNKNOWN;
p = 1LL << map->pos[i];
if (mask & p) {
/* duplicate channel */
for (j = 0; j <= i; j++)
if (map->pos[j] == map->pos[i])
map->pos[j] = SND_CHMAP_UNKNOWN;
dup |= p;
p = 1LL << SND_CHMAP_UNKNOWN;
}
mask |= p;
}
if ((mask & (1LL << SND_CHMAP_UNKNOWN)) == 0)
return;
def = &default_layouts[map->channels];
/* remove duplicates */
mask &= ~dup;
/* keep unassigned channels */
mask = def->mask & ~mask;
pos = 0;
for (i = 0; i < map->channels; i++) {
if (map->pos[i] == SND_CHMAP_UNKNOWN) {
do {
mask >>= 1;
pos++;
}
while (mask != 0 && (mask & 1) == 0);
map->pos[i] = mask ? pos : 0;
}
}
}
static bool uint32_array_contains(uint32_t *vals, uint32_t n_vals, uint32_t val)
{
uint32_t i;
for (i = 0; i < n_vals; i++)
if (vals[i] == val)
return true;
return false;
}
static int add_rate(struct state *state, uint32_t scale, bool all, uint32_t index, uint32_t *next,
snd_pcm_hw_params_t *params, struct spa_pod_builder *b)
{
struct spa_pod_frame f[1];
int err, dir;
unsigned int min, max;
struct spa_pod_choice *choice;
uint32_t rate;
CHECK(snd_pcm_hw_params_get_rate_min(params, &min, &dir), "get_rate_min");
CHECK(snd_pcm_hw_params_get_rate_max(params, &max, &dir), "get_rate_max");
if (!state->multi_rate && state->card->format_ref > 0)
rate = state->card->rate;
else
rate = state->default_rate;
if (rate < min || rate > max)
rate = 0;
if (rate != 0 && !all)
min = max = rate;
if (rate == 0)
rate = state->position ? state->position->clock.rate.denom : DEFAULT_RATE;
rate = SPA_CLAMP(rate, min, max);
spa_pod_builder_prop(b, SPA_FORMAT_AUDIO_rate, 0);
spa_pod_builder_push_choice(b, &f[0], SPA_CHOICE_None, 0);
choice = (struct spa_pod_choice*)spa_pod_builder_frame(b, &f[0]);
if (state->n_allowed_rates > 0) {
uint32_t i, v, last = 0, count = 0;
if (uint32_array_contains(state->allowed_rates, state->n_allowed_rates, rate)) {
spa_pod_builder_int(b, rate * scale);
count++;
}
for (i = 0; i < state->n_allowed_rates; i++) {
v = SPA_CLAMP(state->allowed_rates[i], min, max);
if (v != last &&
uint32_array_contains(state->allowed_rates, state->n_allowed_rates, v)) {
spa_pod_builder_int(b, v * scale);
if (count == 0)
spa_pod_builder_int(b, v * scale);
count++;
}
last = v;
}
if (count > 1)
choice->body.type = SPA_CHOICE_Enum;
} else {
spa_pod_builder_int(b, rate * scale);
if (min != max) {
spa_pod_builder_int(b, min * scale);
spa_pod_builder_int(b, max * scale);
choice->body.type = SPA_CHOICE_Range;
}
}
spa_pod_builder_pop(b, &f[0]);
return 1;
}
static int add_channels(struct state *state, bool all, uint32_t index, uint32_t *next,
snd_pcm_hw_params_t *params, struct spa_pod_builder *b)
{
struct spa_pod_frame f[1];
size_t i;
int err;
snd_pcm_t *hndl = state->hndl;
snd_pcm_chmap_query_t **maps;
unsigned int min, max;
CHECK(snd_pcm_hw_params_get_channels_min(params, &min), "get_channels_min");
CHECK(snd_pcm_hw_params_get_channels_max(params, &max), "get_channels_max");
spa_log_debug(state->log, "channels (%d %d)", min, max);
if (state->default_channels != 0 && !all) {
if (min < state->default_channels)
min = state->default_channels;
if (max > state->default_channels)
max = state->default_channels;
}
min = SPA_MIN(min, SPA_AUDIO_MAX_CHANNELS);
max = SPA_MIN(max, SPA_AUDIO_MAX_CHANNELS);
spa_pod_builder_prop(b, SPA_FORMAT_AUDIO_channels, 0);
if (state->props.use_chmap && (maps = snd_pcm_query_chmaps(hndl)) != NULL) {
uint32_t channel;
snd_pcm_chmap_t* map;
skip_channels:
if (maps[index] == NULL) {
snd_pcm_free_chmaps(maps);
return 0;
}
map = &maps[index]->map;
spa_log_debug(state->log, "map %d channels (%d %d)", map->channels, min, max);
if (map->channels < min || map->channels > max) {
index = (*next)++;
goto skip_channels;
}
sanitize_map(map);
spa_pod_builder_int(b, map->channels);
spa_pod_builder_prop(b, SPA_FORMAT_AUDIO_position, 0);
spa_pod_builder_push_array(b, &f[0]);
for (i = 0; i < map->channels; i++) {
spa_log_debug(state->log, "%p: position %zd %d", state, i, map->pos[i]);
channel = chmap_position_to_channel(map->pos[i]);
spa_pod_builder_id(b, channel);
}
spa_pod_builder_pop(b, &f[0]);
snd_pcm_free_chmaps(maps);
}
else {
const struct channel_map *map = NULL;
struct spa_pod_choice *choice;
if (index > 0)
return 0;
spa_pod_builder_push_choice(b, &f[0], SPA_CHOICE_None, 0);
choice = (struct spa_pod_choice*)spa_pod_builder_frame(b, &f[0]);
spa_pod_builder_int(b, max);
if (min != max) {
spa_pod_builder_int(b, min);
spa_pod_builder_int(b, max);
choice->body.type = SPA_CHOICE_Range;
}
spa_pod_builder_pop(b, &f[0]);
if (min == max) {
if (state->default_pos.channels == min)
map = &state->default_pos;
else if (min == max && min <= 8)
map = &default_map[min];
}
if (map) {
spa_pod_builder_prop(b, SPA_FORMAT_AUDIO_position, 0);
spa_pod_builder_push_array(b, &f[0]);
for (i = 0; i < map->channels; i++) {
spa_log_debug(state->log, "%p: position %zd %d", state, i, map->pos[i]);
spa_pod_builder_id(b, map->pos[i]);
}
spa_pod_builder_pop(b, &f[0]);
}
}
return 1;
}
static int enum_pcm_formats(struct state *state, uint32_t index, uint32_t *next,
struct spa_pod **result, struct spa_pod_builder *b)
{
int res, err;
size_t i, j;
snd_pcm_t *hndl;
snd_pcm_hw_params_t *params;
struct spa_pod_frame f[2];
snd_pcm_format_mask_t *fmask;
snd_pcm_access_mask_t *amask;
unsigned int rrate, rchannels;
struct spa_pod_choice *choice;
hndl = state->hndl;
snd_pcm_hw_params_alloca(&params);
CHECK(snd_pcm_hw_params_any(hndl, params), "Broken configuration: no configurations available");
CHECK(snd_pcm_hw_params_set_rate_resample(hndl, params, 0), "set_rate_resample");
if (state->default_channels != 0) {
rchannels = state->default_channels;
CHECK(snd_pcm_hw_params_set_channels_near(hndl, params, &rchannels), "set_channels");
if (state->default_channels != rchannels) {
spa_log_warn(state->log, "%s: Channels doesn't match (requested %u, got %u)",
state->props.device, state->default_channels, rchannels);
}
}
if (state->default_rate != 0) {
rrate = state->default_rate;
CHECK(snd_pcm_hw_params_set_rate_near(hndl, params, &rrate, 0), "set_rate_near");
if (state->default_rate != rrate) {
spa_log_warn(state->log, "%s: Rate doesn't match (requested %u, got %u)",
state->props.device, state->default_rate, rrate);
}
}
spa_pod_builder_push_object(b, &f[0], SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat);
spa_pod_builder_add(b,
SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_audio),
SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_raw),
0);
snd_pcm_format_mask_alloca(&fmask);
snd_pcm_hw_params_get_format_mask(params, fmask);
snd_pcm_access_mask_alloca(&amask);
snd_pcm_hw_params_get_access_mask(params, amask);
spa_pod_builder_prop(b, SPA_FORMAT_AUDIO_format, 0);
spa_pod_builder_push_choice(b, &f[1], SPA_CHOICE_None, 0);
choice = (struct spa_pod_choice*)spa_pod_builder_frame(b, &f[1]);
for (i = 1, j = 0; i < SPA_N_ELEMENTS(format_info); i++) {
const struct format_info *fi = &format_info[i];
if (snd_pcm_format_mask_test(fmask, fi->format)) {
if ((snd_pcm_access_mask_test(amask, SND_PCM_ACCESS_MMAP_NONINTERLEAVED) ||
snd_pcm_access_mask_test(amask, SND_PCM_ACCESS_RW_NONINTERLEAVED)) &&
fi->spa_pformat != SPA_AUDIO_FORMAT_UNKNOWN &&
(state->default_format == 0 || state->default_format == fi->spa_pformat)) {
if (j++ == 0)
spa_pod_builder_id(b, fi->spa_pformat);
spa_pod_builder_id(b, fi->spa_pformat);
}
if ((snd_pcm_access_mask_test(amask, SND_PCM_ACCESS_MMAP_INTERLEAVED) ||
snd_pcm_access_mask_test(amask, SND_PCM_ACCESS_RW_INTERLEAVED)) &&
(state->default_format == 0 || state->default_format == fi->spa_format)) {
if (j++ == 0)
spa_pod_builder_id(b, fi->spa_format);
spa_pod_builder_id(b, fi->spa_format);
}
}
}
if (j == 0) {
char buf[1024];
int i, r, offs;
for (i = 0, offs = 0; i <= SND_PCM_FORMAT_LAST; i++) {
if (snd_pcm_format_mask_test(fmask, (snd_pcm_format_t)i)) {
r = snprintf(&buf[offs], sizeof(buf) - offs,
"%s ", snd_pcm_format_name((snd_pcm_format_t)i));
if (r < 0 || r + offs >= (int)sizeof(buf))
return -ENOSPC;
offs += r;
}
}
spa_log_warn(state->log, "%s: no format found (def:%d) formats:%s",
state->props.device, state->default_format, buf);
for (i = 0, offs = 0; i <= SND_PCM_ACCESS_LAST; i++) {
if (snd_pcm_access_mask_test(amask, (snd_pcm_access_t)i)) {
r = snprintf(&buf[offs], sizeof(buf) - offs,
"%s ", snd_pcm_access_name((snd_pcm_access_t)i));
if (r < 0 || r + offs >= (int)sizeof(buf))
return -ENOSPC;
offs += r;
}
}
spa_log_warn(state->log, "%s: access:%s", state->props.device, buf);
return -ENOTSUP;
}
if (j > 1)
choice->body.type = SPA_CHOICE_Enum;
spa_pod_builder_pop(b, &f[1]);
if ((res = add_rate(state, 1, false, index & 0xffff, next, params, b)) != 1)
return res;
if ((res = add_channels(state, false, index & 0xffff, next, params, b)) != 1)
return res;
*result = spa_pod_builder_pop(b, &f[0]);
return 1;
}
static bool codec_supported(uint32_t codec, unsigned int chmax, unsigned int rmax)
{
switch (codec) {
case SPA_AUDIO_IEC958_CODEC_PCM:
case SPA_AUDIO_IEC958_CODEC_DTS:
case SPA_AUDIO_IEC958_CODEC_AC3:
case SPA_AUDIO_IEC958_CODEC_MPEG:
case SPA_AUDIO_IEC958_CODEC_MPEG2_AAC:
if (chmax >= 2)
return true;
break;
case SPA_AUDIO_IEC958_CODEC_EAC3:
if (rmax >= 48000 * 4 && chmax >= 2)
return true;
break;
case SPA_AUDIO_IEC958_CODEC_TRUEHD:
case SPA_AUDIO_IEC958_CODEC_DTSHD:
if (chmax >= 8)
return true;
break;
}
return false;
}
static int enum_iec958_formats(struct state *state, uint32_t index, uint32_t *next,
struct spa_pod **result, struct spa_pod_builder *b)
{
int res, err, dir;
snd_pcm_t *hndl;
snd_pcm_hw_params_t *params;
struct spa_pod_frame f[2];
unsigned int rmin, rmax;
unsigned int chmin, chmax;
uint32_t i, c, codecs[16], n_codecs;
if ((index & 0xffff) > 0)
return 0;
if (!(state->is_iec958 || state->is_hdmi))
return 0;
if (state->iec958_codecs == 0)
return 0;
hndl = state->hndl;
snd_pcm_hw_params_alloca(&params);
CHECK(snd_pcm_hw_params_any(hndl, params), "Broken configuration: no configurations available");
CHECK(snd_pcm_hw_params_set_rate_resample(hndl, params, 0), "set_rate_resample");
spa_pod_builder_push_object(b, &f[0], SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat);
spa_pod_builder_add(b,
SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_audio),
SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_iec958),
0);
CHECK(snd_pcm_hw_params_get_channels_min(params, &chmin), "get_channels_min");
CHECK(snd_pcm_hw_params_get_channels_max(params, &chmax), "get_channels_max");
spa_log_debug(state->log, "channels (%d %d)", chmin, chmax);
CHECK(snd_pcm_hw_params_get_rate_min(params, &rmin, &dir), "get_rate_min");
CHECK(snd_pcm_hw_params_get_rate_max(params, &rmax, &dir), "get_rate_max");
spa_log_debug(state->log, "rate (%d %d)", rmin, rmax);
if (state->default_rate != 0) {
if (rmin < state->default_rate)
rmin = state->default_rate;
if (rmax > state->default_rate)
rmax = state->default_rate;
}
spa_pod_builder_prop(b, SPA_FORMAT_AUDIO_iec958Codec, 0);
spa_pod_builder_push_choice(b, &f[1], SPA_CHOICE_Enum, 0);
n_codecs = spa_alsa_get_iec958_codecs(state, codecs, SPA_N_ELEMENTS(codecs));
for (i = 0, c = 0; i < n_codecs; i++) {
if (!codec_supported(codecs[i], chmax, rmax))
continue;
if (c++ == 0)
spa_pod_builder_id(b, codecs[i]);
spa_pod_builder_id(b, codecs[i]);
}
spa_pod_builder_pop(b, &f[1]);
if ((res = add_rate(state, 1, true, index & 0xffff, next, params, b)) != 1)
return res;
(*next)++;
*result = spa_pod_builder_pop(b, &f[0]);
return 1;
}
static int enum_dsd_formats(struct state *state, uint32_t index, uint32_t *next,
struct spa_pod **result, struct spa_pod_builder *b)
{
int res, err;
snd_pcm_t *hndl;
snd_pcm_hw_params_t *params;
snd_pcm_format_mask_t *fmask;
struct spa_pod_frame f[2];
int32_t interleave;
if ((index & 0xffff) > 0)
return 0;
hndl = state->hndl;
snd_pcm_hw_params_alloca(&params);
CHECK(snd_pcm_hw_params_any(hndl, params), "Broken configuration: no configurations available");
snd_pcm_format_mask_alloca(&fmask);
snd_pcm_hw_params_get_format_mask(params, fmask);
if (snd_pcm_format_mask_test(fmask, SND_PCM_FORMAT_DSD_U32_BE))
interleave = 4;
else if (snd_pcm_format_mask_test(fmask, SND_PCM_FORMAT_DSD_U32_LE))
interleave = -4;
else if (snd_pcm_format_mask_test(fmask, SND_PCM_FORMAT_DSD_U16_BE))
interleave = 2;
else if (snd_pcm_format_mask_test(fmask, SND_PCM_FORMAT_DSD_U16_LE))
interleave = -2;
else if (snd_pcm_format_mask_test(fmask, SND_PCM_FORMAT_DSD_U8))
interleave = 1;
else
return 0;
CHECK(snd_pcm_hw_params_set_rate_resample(hndl, params, 0), "set_rate_resample");
spa_pod_builder_push_object(b, &f[0], SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat);
spa_pod_builder_add(b,
SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_audio),
SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_dsd),
0);
spa_pod_builder_prop(b, SPA_FORMAT_AUDIO_bitorder, 0);
spa_pod_builder_id(b, SPA_PARAM_BITORDER_msb);
spa_pod_builder_prop(b, SPA_FORMAT_AUDIO_interleave, 0);
spa_pod_builder_int(b, interleave);
if ((res = add_rate(state, SPA_ABS(interleave), true, index & 0xffff, next, params, b)) != 1)
return res;
if ((res = add_channels(state, true, index & 0xffff, next, params, b)) != 1)
return res;
*result = spa_pod_builder_pop(b, &f[0]);
return 1;
}
int
spa_alsa_enum_format(struct state *state, int seq, uint32_t start, uint32_t num,
const struct spa_pod *filter)
{
uint8_t buffer[4096];
struct spa_pod_builder b = { 0 };
struct spa_pod *fmt;
int err, res;
bool opened;
struct spa_result_node_params result;
uint32_t count = 0;
opened = state->opened;
if ((err = spa_alsa_open(state, NULL)) < 0)
return err;
result.id = SPA_PARAM_EnumFormat;
result.next = start;
next:
result.index = result.next++;
spa_pod_builder_init(&b, buffer, sizeof(buffer));
if (result.index < 0x10000) {
if ((res = enum_pcm_formats(state, result.index, &result.next, &fmt, &b)) != 1) {
result.next = 0x10000;
goto next;
}
}
else if (result.index < 0x20000) {
if ((res = enum_iec958_formats(state, result.index, &result.next, &fmt, &b)) != 1) {
result.next = 0x20000;
goto next;
}
}
else if (result.index < 0x30000) {
if ((res = enum_dsd_formats(state, result.index, &result.next, &fmt, &b)) != 1) {
result.next = 0x30000;
goto next;
}
}
else
goto enum_end;
if (spa_pod_filter(&b, &result.param, fmt, filter) < 0)
goto next;
spa_node_emit_result(&state->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result);
if (++count != num)
goto next;
enum_end:
res = 0;
if (!opened)
spa_alsa_close(state);
return res;
}
int spa_alsa_set_format(struct state *state, struct spa_audio_info *fmt, uint32_t flags)
{
unsigned int rrate, rchannels, val;
snd_pcm_uframes_t period_size;
int err, dir;
snd_pcm_hw_params_t *params;
snd_pcm_format_t rformat;
snd_pcm_access_mask_t *amask;
snd_pcm_t *hndl;
unsigned int periods;
bool match = true, planar = false, is_batch;
char spdif_params[128] = "";
state->use_mmap = !state->disable_mmap;
switch (fmt->media_subtype) {
case SPA_MEDIA_SUBTYPE_raw:
{
struct spa_audio_info_raw *f = &fmt->info.raw;
rrate = f->rate;
rchannels = f->channels;
rformat = spa_format_to_alsa(f->format, &planar);
break;
}
case SPA_MEDIA_SUBTYPE_iec958:
{
struct spa_audio_info_iec958 *f = &fmt->info.iec958;
unsigned aes3;
spa_log_info(state->log, "using IEC958 Codec:%s rate:%d",
spa_debug_type_find_short_name(spa_type_audio_iec958_codec, f->codec),
f->rate);
rformat = SND_PCM_FORMAT_S16_LE;
rchannels = 2;
rrate = f->rate;
switch (f->codec) {
case SPA_AUDIO_IEC958_CODEC_PCM:
case SPA_AUDIO_IEC958_CODEC_DTS:
case SPA_AUDIO_IEC958_CODEC_AC3:
case SPA_AUDIO_IEC958_CODEC_MPEG:
case SPA_AUDIO_IEC958_CODEC_MPEG2_AAC:
break;
case SPA_AUDIO_IEC958_CODEC_EAC3:
/* EAC3 has 3 rates, 32, 44.1 and 48KHz. We need to
* open the device in 4x that rate. Some clients
* already multiply (mpv,..) others don't (vlc). */
if (rrate <= 48000)
rrate *= 4;
break;
case SPA_AUDIO_IEC958_CODEC_TRUEHD:
case SPA_AUDIO_IEC958_CODEC_DTSHD:
rchannels = 8;
break;
default:
return -ENOTSUP;
}
switch (rrate) {
case 22050: aes3 = IEC958_AES3_CON_FS_22050; break;
case 24000: aes3 = IEC958_AES3_CON_FS_24000; break;
case 32000: aes3 = IEC958_AES3_CON_FS_32000; break;
case 44100: aes3 = IEC958_AES3_CON_FS_44100; break;
case 48000: aes3 = IEC958_AES3_CON_FS_48000; break;
case 88200: aes3 = IEC958_AES3_CON_FS_88200; break;
case 96000: aes3 = IEC958_AES3_CON_FS_96000; break;
case 176400: aes3 = IEC958_AES3_CON_FS_176400; break;
case 192000: aes3 = IEC958_AES3_CON_FS_192000; break;
case 768000: aes3 = IEC958_AES3_CON_FS_768000; break;
default: aes3 = IEC958_AES3_CON_FS_NOTID; break;
}
spa_scnprintf(spdif_params, sizeof(spdif_params),
",AES0=0x%x,AES1=0x%x,AES2=0x%x,AES3=0x%x",
IEC958_AES0_CON_EMPHASIS_NONE | IEC958_AES0_NONAUDIO,
IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER,
0, aes3);
break;
}
case SPA_MEDIA_SUBTYPE_dsd:
{
struct spa_audio_info_dsd *f = &fmt->info.dsd;
rrate = f->rate;
rchannels = f->channels;
switch (f->interleave) {
case 4:
rformat = SND_PCM_FORMAT_DSD_U32_BE;
rrate /= 4;
break;
case -4:
rformat = SND_PCM_FORMAT_DSD_U32_LE;
rrate /= 4;
break;
case 2:
rformat = SND_PCM_FORMAT_DSD_U16_BE;
rrate /= 2;
break;
case -2:
rformat = SND_PCM_FORMAT_DSD_U16_LE;
rrate /= 2;
break;
case 1:
rformat = SND_PCM_FORMAT_DSD_U8;
break;
default:
return -ENOTSUP;
}
break;
}
default:
return -ENOTSUP;
}
if (rformat == SND_PCM_FORMAT_UNKNOWN) {
spa_log_warn(state->log, "%s: unknown format",
state->props.device);
return -EINVAL;
}
if ((err = spa_alsa_open(state, spdif_params)) < 0)
return err;
hndl = state->hndl;
snd_pcm_hw_params_alloca(&params);
/* choose all parameters */
CHECK(snd_pcm_hw_params_any(hndl, params), "Broken configuration for playback: no configurations available");
/* set hardware resampling, no resample */
CHECK(snd_pcm_hw_params_set_rate_resample(hndl, params, 0), "set_rate_resample");
/* set the interleaved/planar read/write format */
snd_pcm_access_mask_alloca(&amask);
snd_pcm_hw_params_get_access_mask(params, amask);
if (state->use_mmap) {
if ((err = snd_pcm_hw_params_set_access(hndl, params,
planar ? SND_PCM_ACCESS_MMAP_NONINTERLEAVED
: SND_PCM_ACCESS_MMAP_INTERLEAVED)) < 0) {
spa_log_debug(state->log, "%p: MMAP not possible: %s", state,
snd_strerror(err));
state->use_mmap = false;
}
}
if (!state->use_mmap) {
if ((err = snd_pcm_hw_params_set_access(hndl, params,
planar ? SND_PCM_ACCESS_RW_NONINTERLEAVED
: SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
spa_log_error(state->log, "%s: RW not possible: %s",
state->props.device, snd_strerror(err));
return err;
}
}
/* set the sample format */
spa_log_debug(state->log, "%p: Stream parameters are %iHz fmt:%s access:%s-%s channels:%i",
state, rrate, snd_pcm_format_name(rformat),
state->use_mmap ? "mmap" : "rw",
planar ? "planar" : "interleaved", rchannels);
CHECK(snd_pcm_hw_params_set_format(hndl, params, rformat), "set_format");
/* set the count of channels */
val = rchannels;
CHECK(snd_pcm_hw_params_set_channels_near(hndl, params, &val), "set_channels");
if (rchannels != val) {
spa_log_warn(state->log, "%s: Channels doesn't match (requested %u, got %u)",
state->props.device, rchannels, val);
if (!SPA_FLAG_IS_SET(flags, SPA_NODE_PARAM_FLAG_NEAREST))
return -EINVAL;
rchannels = val;
match = false;
}
if (!state->multi_rate &&
state->card->format_ref > 0 &&
state->card->rate != rrate) {
spa_log_error(state->log, "%p: card already opened at rate:%i",
state, state->card->rate);
return -EINVAL;
}
/* set the stream rate */
val = rrate;
CHECK(snd_pcm_hw_params_set_rate_near(hndl, params, &val, 0), "set_rate_near");
if (rrate != val) {
spa_log_warn(state->log, "%s: Rate doesn't match (requested %iHz, got %iHz)",
state->props.device, rrate, val);
if (!SPA_FLAG_IS_SET(flags, SPA_NODE_PARAM_FLAG_NEAREST))
return -EINVAL;
rrate = val;
match = false;
}
state->format = rformat;
state->channels = rchannels;
state->rate = rrate;
state->frame_size = snd_pcm_format_physical_width(rformat) / 8;
state->planar = planar;
state->blocks = 1;
if (planar)
state->blocks *= rchannels;
else
state->frame_size *= rchannels;
state->have_format = true;
if (state->card->format_ref++ == 0)
state->card->rate = rrate;
dir = 0;
period_size = state->default_period_size;
is_batch = snd_pcm_hw_params_is_batch(params) &&
!state->disable_batch;
if (is_batch) {
if (period_size == 0)
period_size = state->position ? state->position->clock.duration : DEFAULT_PERIOD;
if (period_size == 0)
period_size = DEFAULT_PERIOD;
/* batch devices get their hw pointers updated every period. Make
* the period smaller and add one period of headroom. Limit the
* period size to our default so that we don't create too much
* headroom. */
period_size = SPA_MIN(period_size, DEFAULT_PERIOD) / 2;
spa_log_info(state->log, "%s: batch mode, period_size:%ld",
state->props.device, period_size);
} else {
if (period_size == 0)
period_size = DEFAULT_PERIOD;
/* disable ALSA wakeups, we use a timer */
if (snd_pcm_hw_params_can_disable_period_wakeup(params))
CHECK(snd_pcm_hw_params_set_period_wakeup(hndl, params, 0), "set_period_wakeup");
}
CHECK(snd_pcm_hw_params_set_period_size_near(hndl, params, &period_size, &dir), "set_period_size_near");
state->period_frames = period_size;
if (state->default_period_num != 0) {
periods = state->default_period_num;
CHECK(snd_pcm_hw_params_set_periods_near(hndl, params, &periods, &dir), "set_periods");
state->buffer_frames = period_size * periods;
} else {
CHECK(snd_pcm_hw_params_get_buffer_size_max(params, &state->buffer_frames), "get_buffer_size_max");
state->buffer_frames = SPA_MIN(state->buffer_frames, state->quantum_limit * 4);
CHECK(snd_pcm_hw_params_set_buffer_size_min(hndl, params, &state->buffer_frames), "set_buffer_size_min");
CHECK(snd_pcm_hw_params_set_buffer_size_near(hndl, params, &state->buffer_frames), "set_buffer_size_near");
periods = state->buffer_frames / period_size;
}
state->headroom = state->default_headroom;
if (is_batch)
state->headroom += period_size;
state->headroom = SPA_MIN(state->headroom, state->buffer_frames);
state->start_delay = state->default_start_delay;
state->latency[state->port_direction].min_rate = state->headroom;
state->latency[state->port_direction].max_rate = state->headroom;
spa_log_info(state->log, "%s (%s): format:%s access:%s-%s rate:%d channels:%d "
"buffer frames %lu, period frames %lu, periods %u, frame_size %zd "
"headroom %u start-delay:%u",
state->props.device,
state->stream == SND_PCM_STREAM_CAPTURE ? "capture" : "playback",
snd_pcm_format_name(state->format),
state->use_mmap ? "mmap" : "rw",
planar ? "planar" : "interleaved",
state->rate, state->channels, state->buffer_frames, state->period_frames,
periods, state->frame_size, state->headroom, state->start_delay);
/* write the parameters to device */
CHECK(snd_pcm_hw_params(hndl, params), "set_hw_params");
return match ? 0 : 1;
}
static int set_swparams(struct state *state)
{
snd_pcm_t *hndl = state->hndl;
int err = 0;
snd_pcm_sw_params_t *params;
snd_pcm_sw_params_alloca(&params);
/* get the current params */
CHECK(snd_pcm_sw_params_current(hndl, params), "sw_params_current");
CHECK(snd_pcm_sw_params_set_tstamp_mode(hndl, params, SND_PCM_TSTAMP_ENABLE),
"sw_params_set_tstamp_mode");
CHECK(snd_pcm_sw_params_set_tstamp_type(hndl, params, SND_PCM_TSTAMP_TYPE_MONOTONIC),
"sw_params_set_tstamp_type");
#if 0
snd_pcm_uframes_t boundary;
CHECK(snd_pcm_sw_params_get_boundary(params, &boundary), "get_boundary");
CHECK(snd_pcm_sw_params_set_stop_threshold(hndl, params, boundary), "set_stop_threshold");
#endif
/* start the transfer */
CHECK(snd_pcm_sw_params_set_start_threshold(hndl, params, LONG_MAX), "set_start_threshold");
CHECK(snd_pcm_sw_params_set_period_event(hndl, params, 0), "set_period_event");
/* write the parameters to the playback device */
CHECK(snd_pcm_sw_params(hndl, params), "sw_params");
return 0;
}
static int set_timeout(struct state *state, uint64_t time)
{
struct itimerspec ts;
ts.it_value.tv_sec = time / SPA_NSEC_PER_SEC;
ts.it_value.tv_nsec = time % SPA_NSEC_PER_SEC;
ts.it_interval.tv_sec = 0;
ts.it_interval.tv_nsec = 0;
spa_system_timerfd_settime(state->data_system,
state->timerfd, SPA_FD_TIMER_ABSTIME, &ts, NULL);
return 0;
}
int spa_alsa_silence(struct state *state, snd_pcm_uframes_t silence)
{
snd_pcm_t *hndl = state->hndl;
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t frames, offset;
int i, res;
if (state->use_mmap) {
frames = state->buffer_frames;
if (SPA_UNLIKELY((res = snd_pcm_mmap_begin(hndl, &my_areas, &offset, &frames)) < 0)) {
spa_log_error(state->log, "%s: snd_pcm_mmap_begin error: %s",
state->props.device, snd_strerror(res));
return res;
}
silence = SPA_MIN(silence, frames);
spa_log_trace_fp(state->log, "%p: frames:%ld offset:%ld silence %ld",
state, frames, offset, silence);
snd_pcm_areas_silence(my_areas, offset, state->channels, silence, state->format);
if (SPA_UNLIKELY((res = snd_pcm_mmap_commit(hndl, offset, silence)) < 0)) {
spa_log_error(state->log, "%s: snd_pcm_mmap_commit error: %s",
state->props.device, snd_strerror(res));
return res;
}
} else {
uint8_t buffer[silence * state->frame_size];
memset(buffer, 0, silence * state->frame_size);
if (state->planar) {
void *bufs[state->channels];
for (i = 0; i < state->channels; i++)
bufs[i] = buffer;
snd_pcm_writen(hndl, bufs, silence);
} else {
snd_pcm_writei(hndl, buffer, silence);
}
}
return 0;
}
static inline int do_start(struct state *state)
{
int res;
if (SPA_UNLIKELY(!state->alsa_started)) {
spa_log_trace(state->log, "%p: snd_pcm_start", state);
if ((res = snd_pcm_start(state->hndl)) < 0) {
spa_log_error(state->log, "%s: snd_pcm_start: %s",
state->props.device, snd_strerror(res));
return res;
}
state->alsa_started = true;
}
return 0;
}
static int alsa_recover(struct state *state, int err)
{
int res, st;
snd_pcm_status_t *status;
snd_pcm_status_alloca(&status);
if (SPA_UNLIKELY((res = snd_pcm_status(state->hndl, status)) < 0)) {
spa_log_error(state->log, "%s: snd_pcm_status error: %s",
state->props.device, snd_strerror(res));
goto recover;
}
st = snd_pcm_status_get_state(status);
switch (st) {
case SND_PCM_STATE_XRUN:
{
struct timeval now, trigger, diff;
uint64_t delay, missing;
snd_pcm_status_get_tstamp (status, &now);
snd_pcm_status_get_trigger_tstamp (status, &trigger);
timersub(&now, &trigger, &diff);
delay = SPA_TIMEVAL_TO_USEC(&diff);
missing = delay * state->rate / SPA_USEC_PER_SEC;
spa_log_trace(state->log, "%p: xrun of %"PRIu64" usec %"PRIu64,
state, delay, missing);
spa_node_call_xrun(&state->callbacks,
SPA_TIMEVAL_TO_USEC(&trigger), delay, NULL);
state->sample_count += missing ? missing : state->threshold;
break;
}
case SND_PCM_STATE_SUSPENDED:
spa_log_info(state->log, "%s: recover from state %s",
state->props.device, snd_pcm_state_name(st));
res = snd_pcm_resume(state->hndl);
if (res >= 0)
return res;
err = -ESTRPIPE;
break;
default:
spa_log_error(state->log, "%s: recover from error state %s",
state->props.device, snd_pcm_state_name(st));
break;
}
recover:
if (SPA_UNLIKELY((res = snd_pcm_recover(state->hndl, err, true)) < 0)) {
spa_log_error(state->log, "%s: snd_pcm_recover error: %s",
state->props.device, snd_strerror(res));
return res;
}
spa_dll_init(&state->dll);
state->alsa_recovering = true;
state->alsa_started = false;
if (state->stream == SND_PCM_STREAM_PLAYBACK)
spa_alsa_silence(state, state->start_delay + state->threshold * 2 + state->headroom);
return do_start(state);
}
static int get_avail(struct state *state, uint64_t current_time)
{
int res;
snd_pcm_sframes_t avail;
if (SPA_UNLIKELY((avail = snd_pcm_avail(state->hndl)) < 0)) {
if ((res = alsa_recover(state, avail)) < 0)
return res;
if ((avail = snd_pcm_avail(state->hndl)) < 0) {
spa_log_warn(state->log, "%s: snd_pcm_avail after recover: %s",
state->props.device, snd_strerror(avail));
avail = state->threshold * 2;
}
} else {
state->alsa_recovering = false;
}
return avail;
}
#if 0
static int get_avail_htimestamp(struct state *state, uint64_t current_time)
{
int res;
snd_pcm_uframes_t avail;
snd_htimestamp_t tstamp;
uint64_t then;
if ((res = snd_pcm_htimestamp(state->hndl, &avail, &tstamp)) < 0) {
if ((res = alsa_recover(state, avail)) < 0)
return res;
if ((res = snd_pcm_htimestamp(state->hndl, &avail, &tstamp)) < 0) {
spa_log_warn(state->log, "%s: snd_pcm_htimestamp error: %s",
state->props.device, snd_strerror(res));
avail = state->threshold * 2;
}
} else {
state->alsa_recovering = false;
}
if ((then = SPA_TIMESPEC_TO_NSEC(&tstamp)) != 0) {
if (then < current_time)
avail += (current_time - then) * state->rate / SPA_NSEC_PER_SEC;
else
avail -= (then - current_time) * state->rate / SPA_NSEC_PER_SEC;
}
return SPA_MIN(avail, state->buffer_frames);
}
#endif
static int get_status(struct state *state, uint64_t current_time,
snd_pcm_uframes_t *delay, snd_pcm_uframes_t *target)
{
int avail;
if ((avail = get_avail(state, current_time)) < 0)
return avail;
avail = SPA_MIN(avail, (int)state->buffer_frames);
*target = state->threshold + state->headroom;
if (state->resample && state->rate_match) {
state->delay = state->rate_match->delay;
state->read_size = state->rate_match->size;
} else {
state->delay = 0;
state->read_size = state->threshold;
}
if (state->stream == SND_PCM_STREAM_PLAYBACK) {
*delay = state->buffer_frames - avail;
} else {
*delay = avail;
*target = SPA_MAX(*target, state->read_size);
}
return 0;
}
static int update_time(struct state *state, uint64_t current_time, snd_pcm_sframes_t delay,
snd_pcm_sframes_t target, bool follower)
{
double err, corr;
int32_t diff;
if (state->stream == SND_PCM_STREAM_PLAYBACK)
err = delay - target;
else
err = target - delay;
if (SPA_UNLIKELY(state->dll.bw == 0.0)) {
spa_dll_set_bw(&state->dll, SPA_DLL_BW_MAX, state->threshold, state->rate);
state->next_time = current_time;
state->base_time = current_time;
}
diff = (int32_t) (state->last_threshold - state->threshold);
if (SPA_UNLIKELY(diff != 0)) {
err -= diff;
spa_log_trace(state->log, "%p: follower:%d quantum change %d -> %d (%d) %f",
state, follower, state->last_threshold, state->threshold, diff, err);
state->last_threshold = state->threshold;
state->alsa_sync = true;
}
if (err > state->max_error) {
err = state->max_error;
state->alsa_sync = true;
} else if (err < -state->max_error) {
err = -state->max_error;
state->alsa_sync = true;
}
if (!follower || state->matching)
corr = spa_dll_update(&state->dll, err);
else
corr = 1.0;
if (diff < 0)
state->next_time += diff / corr * 1e9 / state->rate;
if (SPA_UNLIKELY((state->next_time - state->base_time) > BW_PERIOD)) {
state->base_time = state->next_time;
spa_log_debug(state->log, "%s: follower:%d match:%d rate:%f "
"bw:%f thr:%u del:%ld target:%ld err:%f max:%f",
state->props.device, follower, state->matching,
corr, state->dll.bw, state->threshold, delay, target,
err, state->max_error);
}
if (state->rate_match) {
if (state->stream == SND_PCM_STREAM_PLAYBACK)
state->rate_match->rate = corr;
else
state->rate_match->rate = 1.0/corr;
SPA_FLAG_UPDATE(state->rate_match->flags, SPA_IO_RATE_MATCH_FLAG_ACTIVE, state->matching);
}
state->next_time += state->threshold / corr * 1e9 / state->rate;
if (SPA_LIKELY(!follower && state->clock)) {
state->clock->nsec = current_time;
state->clock->position += state->duration;
state->clock->duration = state->duration;
state->clock->delay = delay + state->delay;
state->clock->rate_diff = corr;
state->clock->next_nsec = state->next_time;
}
spa_log_trace_fp(state->log, "%p: follower:%d %"PRIu64" %f %ld %f %f %u",
state, follower, current_time, corr, delay, err, state->threshold * corr,
state->threshold);
return 0;
}
static inline bool is_following(struct state *state)
{
return state->position && state->clock && state->position->clock.id != state->clock->id;
}
static int setup_matching(struct state *state)
{
state->matching = state->following;
if (state->position == NULL)
return -ENOTSUP;
spa_log_debug(state->log, "driver clock:'%s' our clock:'%s'",
state->position->clock.name, state->clock_name);
if (spa_streq(state->position->clock.name, state->clock_name))
state->matching = false;
state->resample = ((uint32_t)state->rate != state->rate_denom) || state->matching;
return 0;
}
static inline void check_position_config(struct state *state)
{
if (SPA_UNLIKELY(state->position == NULL))
return;
if (SPA_UNLIKELY((state->duration != state->position->clock.duration) ||
(state->rate_denom != state->position->clock.rate.denom))) {
state->duration = state->position->clock.duration;
state->rate_denom = state->position->clock.rate.denom;
state->threshold = (state->duration * state->rate + state->rate_denom-1) / state->rate_denom;
state->resample = ((uint32_t)state->rate != state->rate_denom) || state->matching;
state->alsa_sync = true;
}
}
int spa_alsa_write(struct state *state)
{
snd_pcm_t *hndl = state->hndl;
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t written, frames, offset, off, to_write, total_written, max_write;
snd_pcm_sframes_t commitres;
int res = 0;
check_position_config(state);
max_write = state->buffer_frames;
if (state->following && state->alsa_started) {
uint64_t current_time;
snd_pcm_uframes_t delay, target;
current_time = state->position->clock.nsec;
if (SPA_UNLIKELY((res = get_status(state, current_time, &delay, &target)) < 0))
return res;
if (SPA_UNLIKELY(state->alsa_sync)) {
spa_log_warn(state->log, "%s: follower delay:%ld target:%ld thr:%u, resync",
state->props.device, delay, target, state->threshold);
if (delay > target)
snd_pcm_rewind(state->hndl, delay - target);
else if (delay < target)
spa_alsa_silence(state, target - delay);
delay = target;
state->alsa_sync = false;
}
if (SPA_UNLIKELY((res = update_time(state, current_time, delay, target, true)) < 0))
return res;
}
total_written = 0;
again:
frames = max_write;
if (state->use_mmap && frames > 0) {
if (SPA_UNLIKELY((res = snd_pcm_mmap_begin(hndl, &my_areas, &offset, &frames)) < 0)) {
spa_log_error(state->log, "%s: snd_pcm_mmap_begin error: %s",
state->props.device, snd_strerror(res));
return res;
}
spa_log_trace_fp(state->log, "%p: begin %ld %ld %d",
state, offset, frames, state->threshold);
off = offset;
} else {
off = 0;
}
to_write = frames;
written = 0;
while (!spa_list_is_empty(&state->ready) && to_write > 0) {
uint8_t *dst, *src;
size_t n_bytes, n_frames;
struct buffer *b;
struct spa_data *d;
uint32_t i, index, offs, avail, size, maxsize, l0, l1;
b = spa_list_first(&state->ready, struct buffer, link);
d = b->buf->datas;
size = d[0].chunk->size;
maxsize = d[0].maxsize;
index = d[0].chunk->offset + state->ready_offset;
avail = size - state->ready_offset;
avail /= state->frame_size;
n_frames = SPA_MIN(avail, to_write);
n_bytes = n_frames * state->frame_size;
offs = index % maxsize;
l0 = SPA_MIN(n_bytes, maxsize - offs);
l1 = n_bytes - l0;
if (SPA_LIKELY(state->use_mmap)) {
for (i = 0; i < b->buf->n_datas; i++) {
dst = SPA_PTROFF(my_areas[i].addr, off * state->frame_size, uint8_t);
src = d[i].data;
spa_memcpy(dst, src + offs, l0);
if (SPA_UNLIKELY(l1 > 0))
spa_memcpy(dst + l0, src, l1);
}
} else {
if (state->planar) {
void *bufs[b->buf->n_datas];
for (i = 0; i < b->buf->n_datas; i++)
bufs[i] = SPA_PTROFF(d[i].data, offs, void);
snd_pcm_writen(hndl, bufs, l0 / state->frame_size);
if (SPA_UNLIKELY(l1 > 0)) {
for (i = 0; i < b->buf->n_datas; i++)
bufs[i] = d[i].data;
snd_pcm_writen(hndl, bufs, l1 / state->frame_size);
}
} else {
src = d[0].data;
snd_pcm_writei(hndl, src + offs, l0 / state->frame_size);
if (SPA_UNLIKELY(l1 > 0))
snd_pcm_writei(hndl, src, l1 / state->frame_size);
}
}
state->ready_offset += n_bytes;
if (state->ready_offset >= size) {
spa_list_remove(&b->link);
SPA_FLAG_SET(b->flags, BUFFER_FLAG_OUT);
state->io->buffer_id = b->id;
spa_log_trace_fp(state->log, "%p: reuse buffer %u", state, b->id);
spa_node_call_reuse_buffer(&state->callbacks, 0, b->id);
state->ready_offset = 0;
}
written += n_frames;
off += n_frames;
to_write -= n_frames;
}
spa_log_trace_fp(state->log, "%p: commit %ld %ld %"PRIi64,
state, offset, written, state->sample_count);
total_written += written;
if (state->use_mmap && written > 0) {
if (SPA_UNLIKELY((commitres = snd_pcm_mmap_commit(hndl, offset, written)) < 0)) {
spa_log_error(state->log, "%s: snd_pcm_mmap_commit error: %s",
state->props.device, snd_strerror(commitres));
if (commitres != -EPIPE && commitres != -ESTRPIPE)
return res;
}
if (commitres > 0 && written != (snd_pcm_uframes_t) commitres) {
spa_log_warn(state->log, "%s: mmap_commit wrote %ld instead of %ld",
state->props.device, commitres, written);
}
}
if (!spa_list_is_empty(&state->ready) && written > 0)
goto again;
state->sample_count += total_written;
if (SPA_UNLIKELY(!state->alsa_started && total_written > 0))
do_start(state);
return 0;
}
void spa_alsa_recycle_buffer(struct state *this, uint32_t buffer_id)
{
struct buffer *b = &this->buffers[buffer_id];
if (SPA_FLAG_IS_SET(b->flags, BUFFER_FLAG_OUT)) {
spa_log_trace_fp(this->log, "%p: recycle buffer %u", this, buffer_id);
spa_list_append(&this->free, &b->link);
SPA_FLAG_CLEAR(b->flags, BUFFER_FLAG_OUT);
}
}
static snd_pcm_uframes_t
push_frames(struct state *state,
const snd_pcm_channel_area_t *my_areas,
snd_pcm_uframes_t offset,
snd_pcm_uframes_t frames)
{
snd_pcm_uframes_t total_frames = 0;
if (spa_list_is_empty(&state->free)) {
spa_log_warn(state->log, "%s: no more buffers", state->props.device);
total_frames = frames;
} else {
uint8_t *src;
size_t n_bytes, left;
struct buffer *b;
struct spa_data *d;
uint32_t i, avail, l0, l1;
b = spa_list_first(&state->free, struct buffer, link);
spa_list_remove(&b->link);
if (b->h) {
b->h->seq = state->sample_count;
b->h->pts = state->next_time;
b->h->dts_offset = 0;
}
d = b->buf->datas;
avail = d[0].maxsize / state->frame_size;
total_frames = SPA_MIN(avail, frames);
n_bytes = total_frames * state->frame_size;
if (my_areas) {
left = state->buffer_frames - offset;
l0 = SPA_MIN(n_bytes, left * state->frame_size);
l1 = n_bytes - l0;
for (i = 0; i < b->buf->n_datas; i++) {
src = SPA_PTROFF(my_areas[i].addr, offset * state->frame_size, uint8_t);
spa_memcpy(d[i].data, src, l0);
if (l1 > 0)
spa_memcpy(SPA_PTROFF(d[i].data, l0, void), my_areas[i].addr, l1);
d[i].chunk->offset = 0;
d[i].chunk->size = n_bytes;
d[i].chunk->stride = state->frame_size;
}
} else {
void *bufs[b->buf->n_datas];
for (i = 0; i < b->buf->n_datas; i++) {
bufs[i] = d[i].data;
d[i].chunk->offset = 0;
d[i].chunk->size = n_bytes;
d[i].chunk->stride = state->frame_size;
}
if (state->planar) {
snd_pcm_readn(state->hndl, bufs, total_frames);
} else {
snd_pcm_readi(state->hndl, bufs[0], total_frames);
}
}
spa_log_trace_fp(state->log, "%p: wrote %ld frames into buffer %d",
state, total_frames, b->id);
spa_list_append(&state->ready, &b->link);
}
return total_frames;
}
int spa_alsa_read(struct state *state)
{
snd_pcm_t *hndl = state->hndl;
snd_pcm_uframes_t total_read = 0, to_read, max_read;
const snd_pcm_channel_area_t *my_areas;
snd_pcm_uframes_t read, frames, offset;
snd_pcm_sframes_t commitres;
int res = 0;
check_position_config(state);
max_read = state->buffer_frames;
if (state->following && state->alsa_started) {
uint64_t current_time;
snd_pcm_uframes_t avail, delay, target;
uint32_t threshold = state->threshold;
current_time = state->position->clock.nsec;
if ((res = get_status(state, current_time, &delay, &target)) < 0)
return res;
avail = delay;
if (state->alsa_sync) {
spa_log_warn(state->log, "%s: follower delay:%lu target:%lu thr:%u, resync",
state->props.device, delay, target, threshold);
if (delay < target)
max_read = target - delay;
else if (delay > target)
snd_pcm_forward(state->hndl, delay - target);
delay = target;
state->alsa_sync = false;
}
if ((res = update_time(state, current_time, delay, target, true)) < 0)
return res;
if (avail < state->read_size)
max_read = 0;
}
frames = SPA_MIN(max_read, state->read_size);
if (state->use_mmap) {
to_read = state->buffer_frames;
if ((res = snd_pcm_mmap_begin(hndl, &my_areas, &offset, &to_read)) < 0) {
spa_log_error(state->log, "%s: snd_pcm_mmap_begin error: %s",
state->props.device, snd_strerror(res));
return res;
}
spa_log_trace_fp(state->log, "%p: begin offs:%ld frames:%ld to_read:%ld thres:%d", state,
offset, frames, to_read, state->threshold);
} else {
my_areas = NULL;
offset = 0;
}
if (frames > 0) {
read = push_frames(state, my_areas, offset, frames);
total_read += read;
} else {
spa_alsa_skip(state);
total_read += state->read_size;
read = 0;
}
if (state->use_mmap && read > 0) {
spa_log_trace_fp(state->log, "%p: commit offs:%ld read:%ld count:%"PRIi64, state,
offset, read, state->sample_count);
if ((commitres = snd_pcm_mmap_commit(hndl, offset, read)) < 0) {
spa_log_error(state->log, "%s: snd_pcm_mmap_commit error %lu %lu: %s",
state->props.device, frames, read, snd_strerror(commitres));
if (commitres != -EPIPE && commitres != -ESTRPIPE)
return res;
}
if (commitres > 0 && read != (snd_pcm_uframes_t) commitres) {
spa_log_warn(state->log, "%s: mmap_commit read %ld instead of %ld",
state->props.device, commitres, read);
}
}
state->sample_count += total_read;
return 0;
}
int spa_alsa_skip(struct state *state)
{
struct buffer *b;
struct spa_data *d;
uint32_t i, avail, total_frames, n_bytes, frames;
if (spa_list_is_empty(&state->free)) {
spa_log_warn(state->log, "%s: no more buffers", state->props.device);
return -EPIPE;
}
frames = state->read_size;
b = spa_list_first(&state->free, struct buffer, link);
spa_list_remove(&b->link);
d = b->buf->datas;
avail = d[0].maxsize / state->frame_size;
total_frames = SPA_MIN(avail, frames);
n_bytes = total_frames * state->frame_size;
for (i = 0; i < b->buf->n_datas; i++) {
memset(d[i].data, 0, n_bytes);
d[i].chunk->offset = 0;
d[i].chunk->size = n_bytes;
d[i].chunk->stride = state->frame_size;
}
spa_list_append(&state->ready, &b->link);
return 0;
}
static int handle_play(struct state *state, uint64_t current_time,
snd_pcm_uframes_t delay, snd_pcm_uframes_t target)
{
int res;
if (SPA_UNLIKELY(delay > target + state->max_error)) {
spa_log_trace(state->log, "%p: early wakeup %lu %lu", state, delay, target);
if (delay > target * 3)
delay = target * 3;
state->next_time = current_time + (delay - target) * SPA_NSEC_PER_SEC / state->rate;
return -EAGAIN;
}
if (SPA_UNLIKELY((res = update_time(state, current_time, delay, target, false)) < 0))
return res;
if (spa_list_is_empty(&state->ready)) {
struct spa_io_buffers *io = state->io;
spa_log_trace_fp(state->log, "%p: %d", state, io->status);
io->status = SPA_STATUS_NEED_DATA;
res = spa_node_call_ready(&state->callbacks, SPA_STATUS_NEED_DATA);
}
else {
res = spa_alsa_write(state);
}
return res;
}
static int handle_capture(struct state *state, uint64_t current_time,
snd_pcm_uframes_t delay, snd_pcm_uframes_t target)
{
int res;
struct spa_io_buffers *io;
if (SPA_UNLIKELY(delay < target)) {
spa_log_trace(state->log, "%p: early wakeup %ld %ld", state, delay, target);
state->next_time = current_time + (target - delay) * SPA_NSEC_PER_SEC /
state->rate;
return -EAGAIN;
}
if (SPA_UNLIKELY(res = update_time(state, current_time, delay, target, false)) < 0)
return res;
if ((res = spa_alsa_read(state)) < 0)
return res;
if (spa_list_is_empty(&state->ready))
return 0;
io = state->io;
if (io != NULL &&
(io->status != SPA_STATUS_HAVE_DATA || state->rate_match != NULL)) {
struct buffer *b;
if (io->buffer_id < state->n_buffers)
spa_alsa_recycle_buffer(state, io->buffer_id);
b = spa_list_first(&state->ready, struct buffer, link);
spa_list_remove(&b->link);
SPA_FLAG_SET(b->flags, BUFFER_FLAG_OUT);
io->buffer_id = b->id;
io->status = SPA_STATUS_HAVE_DATA;
spa_log_trace_fp(state->log, "%p: output buffer:%d", state, b->id);
}
spa_node_call_ready(&state->callbacks, SPA_STATUS_HAVE_DATA);
return 0;
}
static void alsa_on_timeout_event(struct spa_source *source)
{
struct state *state = source->data;
snd_pcm_uframes_t delay, target;
uint64_t expire, current_time;
if (SPA_UNLIKELY(state->started && spa_system_timerfd_read(state->data_system, state->timerfd, &expire) < 0))
spa_log_warn(state->log, "%p: error reading timerfd: %m", state);
check_position_config(state);
current_time = state->next_time;
if (SPA_UNLIKELY(get_status(state, current_time, &delay, &target) < 0)) {
spa_log_error(state->log, "get_status error");
state->next_time += state->threshold * 1e9 / state->rate;
goto done;
}
#ifndef FASTPATH
if (SPA_UNLIKELY(spa_log_level_enabled(state->log, SPA_LOG_LEVEL_TRACE))) {
struct timespec now;
uint64_t nsec;
if (spa_system_clock_gettime(state->data_system, CLOCK_MONOTONIC, &now) < 0)
return;
nsec = SPA_TIMESPEC_TO_NSEC(&now);
spa_log_trace_fp(state->log, "%p: timeout %lu %lu %"PRIu64" %"PRIu64" %"PRIi64
" %d %"PRIi64, state, delay, target, nsec, nsec,
nsec - current_time, state->threshold, state->sample_count);
}
#endif
if (state->stream == SND_PCM_STREAM_PLAYBACK)
handle_play(state, current_time, delay, target);
else
handle_capture(state, current_time, delay, target);
done:
if (state->next_time > current_time + SPA_NSEC_PER_SEC ||
current_time > state->next_time + SPA_NSEC_PER_SEC) {
spa_log_error(state->log, "%s: impossible timeout %lu %lu %"PRIu64" %"PRIu64" %"PRIi64
" %d %"PRIi64, state->props.device, delay, target, current_time, state->next_time,
state->next_time - current_time, state->threshold, state->sample_count);
state->next_time = current_time + state->threshold * 1e9 / state->rate;
}
set_timeout(state, state->next_time);
}
static void reset_buffers(struct state *this)
{
uint32_t i;
spa_list_init(&this->free);
spa_list_init(&this->ready);
for (i = 0; i < this->n_buffers; i++) {
struct buffer *b = &this->buffers[i];
if (this->stream == SND_PCM_STREAM_PLAYBACK) {
SPA_FLAG_SET(b->flags, BUFFER_FLAG_OUT);
spa_node_call_reuse_buffer(&this->callbacks, 0, b->id);
} else {
spa_list_append(&this->free, &b->link);
SPA_FLAG_CLEAR(b->flags, BUFFER_FLAG_OUT);
}
}
}
static int set_timers(struct state *state)
{
struct timespec now;
int res;
if ((res = spa_system_clock_gettime(state->data_system, CLOCK_MONOTONIC, &now)) < 0)
return res;
state->next_time = SPA_TIMESPEC_TO_NSEC(&now);
if (state->following) {
set_timeout(state, 0);
} else {
set_timeout(state, state->next_time);
}
return 0;
}
int spa_alsa_start(struct state *state)
{
int err;
if (state->started)
return 0;
if (state->position) {
state->duration = state->position->clock.duration;
state->rate_denom = state->position->clock.rate.denom;
}
else {
spa_log_warn(state->log, "%s: no position set, using defaults",
state->props.device);
state->duration = 1024;
state->rate_denom = state->rate;
}
state->following = is_following(state);
setup_matching(state);
state->threshold = (state->duration * state->rate + state->rate_denom-1) / state->rate_denom;
state->last_threshold = state->threshold;
spa_dll_init(&state->dll);
state->max_error = (256.0 * state->rate) / state->rate_denom;
spa_log_debug(state->log, "%p: start %d duration:%d rate:%d follower:%d match:%d resample:%d",
state, state->threshold, state->duration, state->rate_denom,
state->following, state->matching, state->resample);
CHECK(set_swparams(state), "swparams");
if (SPA_UNLIKELY(spa_log_level_enabled(state->log, SPA_LOG_LEVEL_DEBUG)))
snd_pcm_dump(state->hndl, state->output);
if ((err = snd_pcm_prepare(state->hndl)) < 0 && err != -EBUSY) {
spa_log_error(state->log, "%s: snd_pcm_prepare error: %s",
state->props.device, snd_strerror(err));
return err;
}
state->source.func = alsa_on_timeout_event;
state->source.data = state;
state->source.fd = state->timerfd;
state->source.mask = SPA_IO_IN;
state->source.rmask = 0;
spa_loop_add_source(state->data_loop, &state->source);
reset_buffers(state);
state->alsa_sync = true;
state->alsa_recovering = false;
state->alsa_started = false;
if (state->stream == SND_PCM_STREAM_PLAYBACK)
spa_alsa_silence(state, state->start_delay + state->threshold * 2 + state->headroom);
if ((err = do_start(state)) < 0)
return err;
set_timers(state);
state->started = true;
return 0;
}
static int do_reassign_follower(struct spa_loop *loop,
bool async,
uint32_t seq,
const void *data,
size_t size,
void *user_data)
{
struct state *state = user_data;
set_timers(state);
spa_dll_init(&state->dll);
return 0;
}
int spa_alsa_reassign_follower(struct state *state)
{
bool following, freewheel;
if (!state->started)
return 0;
following = is_following(state);
if (following != state->following) {
spa_log_debug(state->log, "%p: reassign follower %d->%d", state, state->following, following);
state->following = following;
spa_loop_invoke(state->data_loop, do_reassign_follower, 0, NULL, 0, true, state);
}
setup_matching(state);
freewheel = state->position &&
SPA_FLAG_IS_SET(state->position->clock.flags, SPA_IO_CLOCK_FLAG_FREEWHEEL);
if (state->freewheel != freewheel) {
spa_log_debug(state->log, "%p: freewheel %d->%d", state, state->freewheel, freewheel);
state->freewheel = freewheel;
if (freewheel)
snd_pcm_pause(state->hndl, 1);
else
snd_pcm_pause(state->hndl, 0);
}
return 0;
}
static int do_remove_source(struct spa_loop *loop,
bool async,
uint32_t seq,
const void *data,
size_t size,
void *user_data)
{
struct state *state = user_data;
struct itimerspec ts;
spa_loop_remove_source(state->data_loop, &state->source);
ts.it_value.tv_sec = 0;
ts.it_value.tv_nsec = 0;
ts.it_interval.tv_sec = 0;
ts.it_interval.tv_nsec = 0;
spa_system_timerfd_settime(state->data_system, state->timerfd, 0, &ts, NULL);
return 0;
}
int spa_alsa_pause(struct state *state)
{
int err;
if (!state->started)
return 0;
spa_log_debug(state->log, "%p: pause", state);
spa_loop_invoke(state->data_loop, do_remove_source, 0, NULL, 0, true, state);
if ((err = snd_pcm_drop(state->hndl)) < 0)
spa_log_error(state->log, "%s: snd_pcm_drop %s", state->props.device,
snd_strerror(err));
state->started = false;
return 0;
}
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