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authorLennart Poettering <lennart@poettering.net>2009-09-09 04:28:52 +0200
committerLennart Poettering <lennart@poettering.net>2009-09-09 04:28:52 +0200
commit557c4295107dc7374c850b0bd5331dd35e8fdd0f (patch)
tree19c1c9c9777cb8ecdb644398f95ab95c8d795e63 /src/modules/alsa/alsa-sink.c
parent71e066c873e5bd31bd446ac0f8d0e97cc0b12ace (diff)
alsa: rework buffer/period configuration
- As discussed on alsa-devel it's probably better to initialize the buffer size first, followed by the period size. If that fails try the other way round. If that fails try to configure only buffer size. If that fails try to configure only period size. Finally, try to configure neither. - Don't require integral periods anymore. Both of these changes should help improving compatibility with various weirder sound devices, such as TV cards.
Diffstat (limited to 'src/modules/alsa/alsa-sink.c')
-rw-r--r--src/modules/alsa/alsa-sink.c44
1 files changed, 24 insertions, 20 deletions
diff --git a/src/modules/alsa/alsa-sink.c b/src/modules/alsa/alsa-sink.c
index 883b32a7..c4ff10de 100644
--- a/src/modules/alsa/alsa-sink.c
+++ b/src/modules/alsa/alsa-sink.c
@@ -116,7 +116,6 @@ struct userdata {
pa_usec_t watermark_dec_not_before;
- unsigned nfragments;
pa_memchunk memchunk;
char *device_name; /* name of the PCM device */
@@ -943,8 +942,7 @@ static int unsuspend(struct userdata *u) {
pa_sample_spec ss;
int err;
pa_bool_t b, d;
- unsigned nfrags;
- snd_pcm_uframes_t period_size;
+ snd_pcm_uframes_t period_size, buffer_size;
pa_assert(u);
pa_assert(!u->pcm_handle);
@@ -961,12 +959,12 @@ static int unsuspend(struct userdata *u) {
}
ss = u->sink->sample_spec;
- nfrags = u->nfragments;
period_size = u->fragment_size / u->frame_size;
+ buffer_size = u->hwbuf_size / u->frame_size;
b = u->use_mmap;
d = u->use_tsched;
- if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &nfrags, &period_size, u->hwbuf_size / u->frame_size, &b, &d, TRUE)) < 0) {
+ if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &period_size, &buffer_size, 0, &b, &d, TRUE)) < 0) {
pa_log("Failed to set hardware parameters: %s", pa_alsa_strerror(err));
goto fail;
}
@@ -981,10 +979,11 @@ static int unsuspend(struct userdata *u) {
goto fail;
}
- if (nfrags != u->nfragments || period_size*u->frame_size != u->fragment_size) {
- pa_log_warn("Resume failed, couldn't restore original fragment settings. (Old: %lu*%lu, New %lu*%lu)",
- (unsigned long) u->nfragments, (unsigned long) u->fragment_size,
- (unsigned long) nfrags, period_size * u->frame_size);
+ if (period_size*u->frame_size != u->fragment_size ||
+ buffer_size*u->frame_size != u->hwbuf_size) {
+ pa_log_warn("Resume failed, couldn't restore original fragment settings. (Old: %lu/%lu, New %lu/%lu)",
+ (unsigned long) u->hwbuf_size, (unsigned long) u->fragment_size,
+ (unsigned long) (buffer_size*u->fragment_size), (unsigned long) (period_size*u->frame_size));
goto fail;
}
@@ -1638,8 +1637,8 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
const char *dev_id = NULL;
pa_sample_spec ss, requested_ss;
pa_channel_map map;
- uint32_t nfrags, frag_size, tsched_size, tsched_watermark;
- snd_pcm_uframes_t period_frames, tsched_frames;
+ uint32_t nfrags, frag_size, buffer_size, tsched_size, tsched_watermark;
+ snd_pcm_uframes_t period_frames, buffer_frames, tsched_frames;
size_t frame_size;
pa_bool_t use_mmap = TRUE, b, use_tsched = TRUE, d, ignore_dB = FALSE;
pa_sink_new_data data;
@@ -1673,7 +1672,10 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
goto fail;
}
+ buffer_size = nfrags * frag_size;
+
period_frames = frag_size/frame_size;
+ buffer_frames = buffer_size/frame_size;
tsched_frames = tsched_size/frame_size;
if (pa_modargs_get_value_boolean(ma, "mmap", &use_mmap) < 0) {
@@ -1740,7 +1742,7 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
&u->device_name,
&ss, &map,
SND_PCM_STREAM_PLAYBACK,
- &nfrags, &period_frames, tsched_frames,
+ &period_frames, &buffer_frames, tsched_frames,
&b, &d, mapping)))
goto fail;
@@ -1755,7 +1757,7 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
&u->device_name,
&ss, &map,
SND_PCM_STREAM_PLAYBACK,
- &nfrags, &period_frames, tsched_frames,
+ &period_frames, &buffer_frames, tsched_frames,
&b, &d, profile_set, &mapping)))
goto fail;
@@ -1767,7 +1769,7 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
&u->device_name,
&ss, &map,
SND_PCM_STREAM_PLAYBACK,
- &nfrags, &period_frames, tsched_frames,
+ &period_frames, &buffer_frames, tsched_frames,
&b, &d, FALSE)))
goto fail;
}
@@ -1819,7 +1821,7 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
pa_alsa_init_proplist_pcm(m->core, data.proplist, u->pcm_handle);
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->device_name);
- pa_proplist_setf(data.proplist, PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE, "%lu", (unsigned long) (period_frames * frame_size * nfrags));
+ pa_proplist_setf(data.proplist, PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE, "%lu", (unsigned long) (buffer_frames * frame_size));
pa_proplist_setf(data.proplist, PA_PROP_DEVICE_BUFFERING_FRAGMENT_SIZE, "%lu", (unsigned long) (period_frames * frame_size));
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_ACCESS_MODE, u->use_tsched ? "mmap+timer" : (u->use_mmap ? "mmap" : "serial"));
@@ -1860,13 +1862,15 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
pa_sink_set_rtpoll(u->sink, u->rtpoll);
u->frame_size = frame_size;
- u->fragment_size = frag_size = (uint32_t) (period_frames * frame_size);
- u->nfragments = nfrags;
- u->hwbuf_size = u->fragment_size * nfrags;
+ u->fragment_size = frag_size = (size_t) (period_frames * frame_size);
+ u->hwbuf_size = buffer_size = (size_t) (buffer_frames * frame_size);
pa_cvolume_mute(&u->hardware_volume, u->sink->sample_spec.channels);
- pa_log_info("Using %u fragments of size %lu bytes, buffer time is %0.2fms",
- nfrags, (long unsigned) u->fragment_size,
+ pa_log_info("Using %0.1f fragments of size %lu bytes (%0.2fms), buffer size is %lu bytes (%0.2fms)",
+ (double) u->hwbuf_size / (double) u->fragment_size,
+ (long unsigned) u->fragment_size,
+ (double) pa_bytes_to_usec(u->fragment_size, &ss) / PA_USEC_PER_MSEC,
+ (long unsigned) u->hwbuf_size,
(double) pa_bytes_to_usec(u->hwbuf_size, &ss) / PA_USEC_PER_MSEC);
pa_sink_set_max_request(u->sink, u->hwbuf_size);