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alsa: Send buffer params to PipeWire when we know the format

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This commit is contained in:
Wim Taymans 2018-06-22 17:39:15 +02:00
parent 5d30ccfaff
commit 1276a15143
1 changed files with 27 additions and 1 deletions
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28
alsa-plugins/pcm_pipewire.c
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@ -22,6 +22,7 @@
#define __USE_GNU
#define _GNU_SOURCE
#include <limits.h>
#include <byteswap.h>
#include <sys/shm.h>
#include <sys/types.h>
@ -325,6 +326,30 @@ snd_pcm_pipewire_process_record(snd_pcm_pipewire_t *pw, struct pw_buffer *b)
return 0;
}
static void on_stream_format_changed(void *data, const struct spa_pod *format)
{
snd_pcm_pipewire_t *pw = data;
struct pw_type *t = pw->t;
snd_pcm_ioplug_t *io = &pw->io;
const struct spa_pod *params[4];
uint32_t n_params = 0;
uint8_t buffer[4096];
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
uint32_t stride = (io->channels * pw->sample_bits) / 8;
params[n_params++] = spa_pod_builder_object(&b,
t->param.idBuffers, t->param_buffers.Buffers,
":", t->param_buffers.buffers, "iru", io->buffer_size / io->period_size,
SPA_POD_PROP_MIN_MAX(3, 64),
":", t->param_buffers.blocks, "i", 1,
":", t->param_buffers.size, "ir", io->period_size * stride,
SPA_POD_PROP_MIN_MAX(io->period_size * stride, INT_MAX),
":", t->param_buffers.stride, "i", stride,
":", t->param_buffers.align, "i", 16);
pw_stream_finish_format(pw->stream, 0, params, n_params);
}
static void on_stream_process(void *data)
{
snd_pcm_pipewire_t *pw = data;
@ -345,6 +370,7 @@ static void on_stream_process(void *data)
static const struct pw_stream_events stream_events = {
PW_VERSION_STREAM_EVENTS,
.format_changed = on_stream_format_changed,
.process = on_stream_process,
};
@ -371,7 +397,7 @@ static int snd_pcm_pipewire_prepare(snd_pcm_ioplug_t *io)
}
props = pw_properties_new("client.api", "alsa", NULL);
pw_properties_setf(props, "node.latency", "%lu", io->period_size);
pw_properties_setf(props, "node.latency", "%lu/%u", io->period_size, io->rate);
pw->stream = pw_stream_new(pw->remote, pw->node_name, props);
if (pw->stream == NULL)