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[client] audio/pw: set maximum node latency

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This prevents severe buffer underruns if the PipeWire quantum is bigger
than the ring buffer size. This could happen if a media player is running
at the same time as Looking Glass if it requests a very large quantum size,
for example.
This commit is contained in:
Chris Spencer 2022-01-10 21:27:35 +00:00 committed by Geoffrey McRae
parent e72e138267
commit ef9b2958ec
1 changed files with 14 additions and 5 deletions
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19
client/audiodevs/PipeWire/pipewire.c
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@ -27,6 +27,7 @@
#include "common/debug.h"
#include "common/ringbuffer.h"
#include "common/stringutils.h"
#include "common/util.h"
typedef enum
@ -202,21 +203,29 @@ static void pipewire_playbackStart(int channels, int sampleRate)
pipewire_playbackStopStream();
int bufferFrames = sampleRate / 10;
pw.playback.channels = channels;
pw.playback.sampleRate = sampleRate;
pw.playback.stride = sizeof(uint16_t) * channels;
pw.playback.buffer = ringbuffer_new(sampleRate / 10,
pw.playback.buffer = ringbuffer_new(bufferFrames,
channels * sizeof(uint16_t));
int maxLatencyFrames = bufferFrames / 2;
char maxLatency[32];
snprintf(maxLatency, sizeof(maxLatency), "%d/%d", maxLatencyFrames,
sampleRate);
pw_thread_loop_lock(pw.thread);
pw.playback.stream = pw_stream_new_simple(
pw.loop,
"Looking Glass",
pw_properties_new(
PW_KEY_NODE_NAME , "Looking Glass",
PW_KEY_MEDIA_TYPE , "Audio",
PW_KEY_MEDIA_CATEGORY, "Playback",
PW_KEY_MEDIA_ROLE , "Music",
PW_KEY_NODE_NAME , "Looking Glass",
PW_KEY_MEDIA_TYPE , "Audio",
PW_KEY_MEDIA_CATEGORY , "Playback",
PW_KEY_MEDIA_ROLE , "Music",
PW_KEY_NODE_MAX_LATENCY, maxLatency,
NULL
),
&events,