mirrors/pipewire
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pipewire/pipewire.git synced 2025-11-03 09:01:54 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

alsa: clamp the period size to something sensible

Browse source 
some clients (sweep) want to negotiate the smallest possible period
size we can support, which is expressed in bytes and independent
of samplerate, format and number of channels.

For files with high samplerate and channelcount, this results in periods
of 8 frames, which is too small to handle.

Instead round up the period size to something we can likely handle,
taking into account the samplerate and number of channels.
This commit is contained in:
Wim Taymans 2018-10-16 10:02:10 +02:00
parent 7af81f8080
commit 7e513ea243
1 changed files with 29 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

44
alsa-plugins/pcm_pipewire.c
View file

@ -45,6 +45,8 @@
#define MAX_CHANNELS 32
#define MAX_RATE (48000*8)
#define MIN_PERIOD 64
typedef struct {
snd_pcm_ioplug_t io;
@ -189,9 +191,9 @@ snd_pcm_pipewire_process_playback(snd_pcm_pipewire_t *pw, struct pw_buffer *b)
nbytes = SPA_MIN(avail, maxsize - offset);
ptr = SPA_MEMBER(d[0].data, offset, void);
pw_log_trace("%d %d %d %d %p %d", nbytes, avail, filled, offset, ptr, io->state);
nframes = nbytes / bpf;
pw_log_trace("%d %d %lu %d %d %p %d", nbytes, avail, nframes, filled, offset, ptr, io->state);
for (channel = 0; channel < io->channels; channel++) {
pwareas[channel].addr = ptr;
@ -317,10 +319,15 @@ static void on_stream_format_changed(void *data, const struct spa_pod *format)
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;
uint32_t buffers = SPA_CLAMP(io->buffer_size / io->period_size, MIN_BUFFERS, MAX_BUFFERS);
uint32_t size = io->period_size * stride;
uint32_t buffers;
uint32_t size;
pw_log_info("buffers %lu %lu %u %u %u", io->buffer_size, io->period_size, buffers, stride, size);
io->period_size = pw->min_avail;
buffers = SPA_CLAMP(io->buffer_size / io->period_size, MIN_BUFFERS, MAX_BUFFERS);
size = io->period_size * stride;
pw_log_info("buffer_size:%lu period_size:%lu buffers:%u stride:%u size:%u min_avail:%lu",
io->buffer_size, io->period_size, buffers, stride, size, pw->min_avail);
params[n_params++] = spa_pod_builder_object(&b,
SPA_TYPE_OBJECT_ParamBuffers, SPA_PARAM_Buffers,
@ -367,10 +374,20 @@ static int snd_pcm_pipewire_prepare(snd_pcm_ioplug_t *io)
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
struct pw_properties *props;
int res;
uint32_t min_period;
pw_thread_loop_lock(pw->main_loop);
pw_log_debug("prepare %d %p %lu", pw->error, pw->stream, io->period_size);
snd_pcm_sw_params_alloca(&swparams);
if ((res = snd_pcm_sw_params_current(io->pcm, swparams)) == 0)
snd_pcm_sw_params_get_avail_min(swparams, &pw->min_avail);
else
pw->min_avail = io->period_size;
min_period = (MIN_PERIOD * io->rate / 48000);
pw->min_avail = SPA_MAX(pw->min_avail, min_period);
pw_log_debug("prepare %d %p %lu %ld", pw->error, pw->stream, io->period_size, pw->min_avail);
if (!pw->error && pw->stream != NULL)
goto done;
@ -380,7 +397,8 @@ 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/%u", io->period_size, io->rate);
pw_properties_setf(props, "node.latency", "%lu/%u", pw->min_avail, io->rate);
pw_properties_set(props, PW_NODE_PROP_MEDIA, "Audio");
pw_properties_set(props, PW_NODE_PROP_CATEGORY,
io->stream == SND_PCM_STREAM_PLAYBACK ?
@ -410,12 +428,6 @@ static int snd_pcm_pipewire_prepare(snd_pcm_ioplug_t *io)
done:
pw->hw_ptr = 0;
snd_pcm_sw_params_alloca(&swparams);
if ((res = snd_pcm_sw_params_current(io->pcm, swparams)) == 0)
snd_pcm_sw_params_get_avail_min(swparams, &pw->min_avail);
else
pw->min_avail = io->period_size;
pw_thread_loop_unlock(pw->main_loop);
return 0;
@ -505,7 +517,7 @@ static int snd_pcm_pipewire_hw_params(snd_pcm_ioplug_t * io,
snd_pcm_pipewire_t *pw = io->private_data;
bool planar;
pw_log_debug("hw_params");
pw_log_debug("hw_params %lu %lu", io->buffer_size, io->period_size);
switch(io->access) {
case SND_PCM_ACCESS_MMAP_INTERLEAVED:
@ -722,10 +734,12 @@ static int pipewire_set_hw_constraint(snd_pcm_pipewire_t *pw)
1, MAX_CHANNELS)) < 0 ||
(err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_RATE,
1, MAX_RATE)) < 0 ||
(err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_BUFFER_BYTES,
16*1024, 4*1024*1024)) < 0 ||
(err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_PERIOD_BYTES,
128, 64*1024)) < 0 ||
128, 2*1024*1024)) < 0 ||
(err = snd_pcm_ioplug_set_param_minmax(&pw->io, SND_PCM_IOPLUG_HW_PERIODS,
2, 64)) < 0)
3, 64)) < 0)
return err;
return 0;