From 045c1d602dcba57868845ba3270510593c39480f Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Thu, 15 May 2008 23:34:41 +0000 Subject: merge glitch-free branch back into trunk git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2445 fefdeb5f-60dc-0310-8127-8f9354f1896f --- src/modules/module-alsa-sink.c | 1079 +++++++++++++++++++++++++++++----------- 1 file changed, 800 insertions(+), 279 deletions(-) (limited to 'src/modules/module-alsa-sink.c') diff --git a/src/modules/module-alsa-sink.c b/src/modules/module-alsa-sink.c index 14aef7c9..95a72fdc 100644 --- a/src/modules/module-alsa-sink.c +++ b/src/modules/module-alsa-sink.c @@ -3,7 +3,7 @@ /*** This file is part of PulseAudio. - Copyright 2004-2006 Lennart Poettering + Copyright 2004-2008 Lennart Poettering Copyright 2006 Pierre Ossman for Cendio AB PulseAudio is free software; you can redistribute it and/or modify @@ -32,6 +32,7 @@ #include #include +#include #include #include @@ -46,6 +47,8 @@ #include #include #include +#include +#include #include "alsa-util.h" #include "module-alsa-sink-symdef.h" @@ -57,16 +60,42 @@ PA_MODULE_LOAD_ONCE(FALSE); PA_MODULE_USAGE( "sink_name= " "device= " - "device_id= " + "device_id= " "format= " - "channels= " "rate= " + "channels= " + "channel_map= " "fragments= " "fragment_size= " - "channel_map= " - "mmap="); + "mmap= " + "tsched= " + "tsched_buffer_size= " + "tsched_buffer_watermark= " + "mixer_reset="); + +static const char* const valid_modargs[] = { + "sink_name", + "device", + "device_id", + "format", + "rate", + "channels", + "channel_map", + "fragments", + "fragment_size", + "mmap", + "tsched", + "tsched_buffer_size", + "tsched_buffer_watermark", + "mixer_reset", + NULL +}; #define DEFAULT_DEVICE "default" +#define DEFAULT_TSCHED_BUFFER_USEC (2*PA_USEC_PER_SEC) /* 2s */ +#define DEFAULT_TSCHED_WATERMARK_USEC (20*PA_USEC_PER_MSEC) /* 20ms */ +#define TSCHED_MIN_SLEEP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */ +#define TSCHED_MIN_WAKEUP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */ struct userdata { pa_core *core; @@ -83,227 +112,404 @@ struct userdata { snd_mixer_t *mixer_handle; snd_mixer_elem_t *mixer_elem; long hw_volume_max, hw_volume_min; + long hw_dB_max, hw_dB_min; + pa_bool_t hw_dB_supported; - size_t frame_size, fragment_size, hwbuf_size; + size_t frame_size, fragment_size, hwbuf_size, tsched_watermark; unsigned nfragments; pa_memchunk memchunk; char *device_name; - pa_bool_t use_mmap; + pa_bool_t use_mmap, use_tsched; - pa_bool_t first; + pa_bool_t first, after_rewind; pa_rtpoll_item *alsa_rtpoll_item; snd_mixer_selem_channel_id_t mixer_map[SND_MIXER_SCHN_LAST]; -}; -static const char* const valid_modargs[] = { - "device", - "device_id", - "sink_name", - "format", - "channels", - "rate", - "fragments", - "fragment_size", - "channel_map", - "mmap", - NULL + pa_smoother *smoother; + int64_t frame_index; + uint64_t since_start; + + snd_pcm_sframes_t hwbuf_unused_frames; }; -static int mmap_write(struct userdata *u) { +static void fix_tsched_watermark(struct userdata *u) { + size_t max_use; + size_t min_sleep, min_wakeup; + pa_assert(u); + + max_use = u->hwbuf_size - u->hwbuf_unused_frames * u->frame_size; + + min_sleep = pa_usec_to_bytes(TSCHED_MIN_SLEEP_USEC, &u->sink->sample_spec); + min_wakeup = pa_usec_to_bytes(TSCHED_MIN_WAKEUP_USEC, &u->sink->sample_spec); + + if (min_sleep > max_use/2) + min_sleep = pa_frame_align(max_use/2, &u->sink->sample_spec); + if (min_sleep < u->frame_size) + min_sleep = u->frame_size; + + if (min_wakeup > max_use/2) + min_wakeup = pa_frame_align(max_use/2, &u->sink->sample_spec); + if (min_wakeup < u->frame_size) + min_wakeup = u->frame_size; + + if (u->tsched_watermark > max_use-min_sleep) + u->tsched_watermark = max_use-min_sleep; + + if (u->tsched_watermark < min_wakeup) + u->tsched_watermark = min_wakeup; +} + +static void hw_sleep_time(struct userdata *u, pa_usec_t *sleep_usec, pa_usec_t*process_usec) { + pa_usec_t usec, wm; + + pa_assert(sleep_usec); + pa_assert(process_usec); + + pa_assert(u); + + usec = pa_sink_get_requested_latency_within_thread(u->sink); + + if (usec == (pa_usec_t) -1) + usec = pa_bytes_to_usec(u->hwbuf_size, &u->sink->sample_spec); + +/* pa_log_debug("hw buffer time: %u ms", (unsigned) (usec / PA_USEC_PER_MSEC)); */ + + wm = pa_bytes_to_usec(u->tsched_watermark, &u->sink->sample_spec); + + if (usec >= wm) { + *sleep_usec = usec - wm; + *process_usec = wm; + } else + *process_usec = *sleep_usec = usec / 2; + +/* pa_log_debug("after watermark: %u ms", (unsigned) (*sleep_usec / PA_USEC_PER_MSEC)); */ +} + +static int try_recover(struct userdata *u, const char *call, int err) { + pa_assert(u); + pa_assert(call); + pa_assert(err < 0); + + pa_log_debug("%s: %s", call, snd_strerror(err)); + + pa_assert(err != -EAGAIN); + + if (err == -EPIPE) + pa_log_debug("%s: Buffer underrun!", call); + + if ((err = snd_pcm_recover(u->pcm_handle, err, 1)) == 0) { + u->first = TRUE; + u->since_start = 0; + return 0; + } + + pa_log("%s: %s", call, snd_strerror(err)); + return -1; +} + +static size_t check_left_to_play(struct userdata *u, snd_pcm_sframes_t n) { + size_t left_to_play; + + if (n*u->frame_size < u->hwbuf_size) + left_to_play = u->hwbuf_size - (n*u->frame_size); + else + left_to_play = 0; + + if (left_to_play > 0) { +/* pa_log_debug("%0.2f ms left to play", (double) pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) / PA_USEC_PER_MSEC); */ + } else if (!u->first && !u->after_rewind) { + pa_log_info("Underrun!"); + + if (u->use_tsched) { + size_t old_watermark = u->tsched_watermark; + + u->tsched_watermark *= 2; + fix_tsched_watermark(u); + + if (old_watermark != u->tsched_watermark) + pa_log_notice("Increasing wakeup watermark to %0.2f ms", + (double) pa_bytes_to_usec(u->tsched_watermark, &u->sink->sample_spec) / PA_USEC_PER_MSEC); + } + } + + return left_to_play; +} + +static int mmap_write(struct userdata *u, pa_usec_t *sleep_usec) { int work_done = 0; + pa_usec_t max_sleep_usec, process_usec; + size_t left_to_play; pa_assert(u); pa_sink_assert_ref(u->sink); + if (u->use_tsched) + hw_sleep_time(u, &max_sleep_usec, &process_usec); + for (;;) { - pa_memchunk chunk; - void *p; snd_pcm_sframes_t n; - int err; - const snd_pcm_channel_area_t *areas; - snd_pcm_uframes_t offset, frames; + int r; - if ((n = snd_pcm_avail_update(u->pcm_handle)) < 0) { + snd_pcm_hwsync(u->pcm_handle); - if (n == -EPIPE) { - pa_log_debug("snd_pcm_avail_update: Buffer underrun!"); - u->first = TRUE; - } + /* First we determine how many samples are missing to fill the + * buffer up to 100% */ - if ((err = snd_pcm_recover(u->pcm_handle, n, 1)) == 0) - continue; + if (PA_UNLIKELY((n = snd_pcm_avail_update(u->pcm_handle)) < 0)) { - if (err == -EAGAIN) - return work_done; + if ((r = try_recover(u, "snd_pcm_avail_update", n)) == 0) + continue; - pa_log("snd_pcm_avail_update: %s", snd_strerror(err)); - return -1; + return r; } -/* pa_log("Got request for %i samples", (int) n); */ + left_to_play = check_left_to_play(u, n); - if (n <= 0) - return work_done; + if (u->use_tsched) - frames = n; + /* We won't fill up the playback buffer before at least + * half the sleep time is over because otherwise we might + * ask for more data from the clients then they expect. We + * need to guarantee that clients only have to keep around + * a single hw buffer length. */ - if ((err = snd_pcm_mmap_begin(u->pcm_handle, &areas, &offset, &frames)) < 0) { + if (pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) > max_sleep_usec/2) + break; - if (err == -EPIPE) { - pa_log_debug("snd_pcm_mmap_begin: Buffer underrun!"); - u->first = TRUE; - } + if (PA_UNLIKELY(n <= u->hwbuf_unused_frames)) + break; - if ((err = snd_pcm_recover(u->pcm_handle, err, 1)) == 0) - continue; + n -= u->hwbuf_unused_frames; - if (err == -EAGAIN) - return work_done; +/* pa_log_debug("Filling up"); */ - pa_log("Failed to write data to DSP: %s", snd_strerror(err)); - return -1; - } + for (;;) { + pa_memchunk chunk; + void *p; + int err; + const snd_pcm_channel_area_t *areas; + snd_pcm_uframes_t offset, frames = (snd_pcm_uframes_t) n; - /* Check these are multiples of 8 bit */ - pa_assert((areas[0].first & 7) == 0); - pa_assert((areas[0].step & 7)== 0); +/* pa_log_debug("%lu frames to write", (unsigned long) frames); */ - /* We assume a single interleaved memory buffer */ - pa_assert((areas[0].first >> 3) == 0); - pa_assert((areas[0].step >> 3) == u->frame_size); + if (PA_UNLIKELY((err = snd_pcm_mmap_begin(u->pcm_handle, &areas, &offset, &frames)) < 0)) { - p = (uint8_t*) areas[0].addr + (offset * u->frame_size); + if ((r = try_recover(u, "snd_pcm_mmap_begin", err)) == 0) + continue; - chunk.memblock = pa_memblock_new_fixed(u->core->mempool, p, frames * u->frame_size, 1); - chunk.length = pa_memblock_get_length(chunk.memblock); - chunk.index = 0; + return r; + } - pa_sink_render_into_full(u->sink, &chunk); + /* Make sure that if these memblocks need to be copied they will fit into one slot */ + if (frames > pa_mempool_block_size_max(u->sink->core->mempool)/u->frame_size) + frames = pa_mempool_block_size_max(u->sink->core->mempool)/u->frame_size; - /* FIXME: Maybe we can do something to keep this memory block - * a little bit longer around? */ - pa_memblock_unref_fixed(chunk.memblock); + /* Check these are multiples of 8 bit */ + pa_assert((areas[0].first & 7) == 0); + pa_assert((areas[0].step & 7)== 0); - if ((err = snd_pcm_mmap_commit(u->pcm_handle, offset, frames)) < 0) { + /* We assume a single interleaved memory buffer */ + pa_assert((areas[0].first >> 3) == 0); + pa_assert((areas[0].step >> 3) == u->frame_size); - if (err == -EPIPE) { - pa_log_debug("snd_pcm_mmap_commit: Buffer underrun!"); - u->first = TRUE; - } + p = (uint8_t*) areas[0].addr + (offset * u->frame_size); - if ((err = snd_pcm_recover(u->pcm_handle, err, 1)) == 0) - continue; + chunk.memblock = pa_memblock_new_fixed(u->core->mempool, p, frames * u->frame_size, TRUE); + chunk.length = pa_memblock_get_length(chunk.memblock); + chunk.index = 0; - if (err == -EAGAIN) - return work_done; + pa_sink_render_into_full(u->sink, &chunk); - pa_log("Failed to write data to DSP: %s", snd_strerror(err)); - return -1; - } + /* FIXME: Maybe we can do something to keep this memory block + * a little bit longer around? */ + pa_memblock_unref_fixed(chunk.memblock); - work_done = 1; + if (PA_UNLIKELY((err = snd_pcm_mmap_commit(u->pcm_handle, offset, frames)) < 0)) { - if (frames >= (snd_pcm_uframes_t) n) - return work_done; + if ((r = try_recover(u, "snd_pcm_mmap_commit", err)) == 0) + continue; -/* pa_log("wrote %i samples", (int) frames); */ + return r; + } + + work_done = 1; + + u->frame_index += frames; + u->since_start += frames * u->frame_size; + +/* pa_log_debug("wrote %lu frames", (unsigned long) frames); */ + + if (frames >= (snd_pcm_uframes_t) n) + break; + + n -= frames; + } } + + *sleep_usec = pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) - process_usec; + return work_done; } -static int unix_write(struct userdata *u) { - snd_pcm_status_t *status; +static int unix_write(struct userdata *u, pa_usec_t *sleep_usec) { int work_done = 0; - - snd_pcm_status_alloca(&status); + pa_usec_t max_sleep_usec, process_usec; + size_t left_to_play; pa_assert(u); pa_sink_assert_ref(u->sink); + if (u->use_tsched) + hw_sleep_time(u, &max_sleep_usec, &process_usec); + for (;;) { - void *p; - snd_pcm_sframes_t t; - ssize_t l; - int err; + snd_pcm_sframes_t n; + int r; - if ((err = snd_pcm_status(u->pcm_handle, status)) < 0) { - pa_log("Failed to query DSP status data: %s", snd_strerror(err)); - return -1; + snd_pcm_hwsync(u->pcm_handle); + + if (PA_UNLIKELY((n = snd_pcm_avail_update(u->pcm_handle)) < 0)) { + + if ((r = try_recover(u, "snd_pcm_avail_update", n)) == 0) + continue; + + return r; } - if (snd_pcm_status_get_avail_max(status)*u->frame_size >= u->hwbuf_size) - pa_log_debug("Buffer underrun!"); + left_to_play = check_left_to_play(u, n); - l = snd_pcm_status_get_avail(status) * u->frame_size; + if (u->use_tsched) -/* pa_log("%u bytes to write", l); */ + /* We won't fill up the playback buffer before at least + * half the sleep time is over because otherwise we might + * ask for more data from the clients then they expect. We + * need to guarantee that clients only have to keep around + * a single hw buffer length. */ - if (l <= 0) - return work_done; + if (pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) > max_sleep_usec/2) + break; - if (u->memchunk.length <= 0) - pa_sink_render(u->sink, l, &u->memchunk); + if (PA_UNLIKELY(n <= u->hwbuf_unused_frames)) + break; - pa_assert(u->memchunk.length > 0); + n -= u->hwbuf_unused_frames; - p = pa_memblock_acquire(u->memchunk.memblock); - t = snd_pcm_writei(u->pcm_handle, (const uint8_t*) p + u->memchunk.index, u->memchunk.length / u->frame_size); - pa_memblock_release(u->memchunk.memblock); + for (;;) { + snd_pcm_sframes_t frames; + void *p; -/* pa_log("wrote %i bytes of %u (%u)", t*u->frame_size, u->memchunk.length, l); */ +/* pa_log_debug("%lu frames to write", (unsigned long) frames); */ - pa_assert(t != 0); + if (u->memchunk.length <= 0) + pa_sink_render(u->sink, n * u->frame_size, &u->memchunk); - if (t < 0) { + pa_assert(u->memchunk.length > 0); - if ((t = snd_pcm_recover(u->pcm_handle, t, 1)) == 0) - continue; + frames = u->memchunk.length / u->frame_size; + + if (frames > n) + frames = n; + + p = pa_memblock_acquire(u->memchunk.memblock); + frames = snd_pcm_writei(u->pcm_handle, (const uint8_t*) p + u->memchunk.index, frames); + pa_memblock_release(u->memchunk.memblock); - if (t == -EAGAIN) { - pa_log_debug("EAGAIN"); - return work_done; - } else { - pa_log("Failed to write data to DSP: %s", snd_strerror(t)); - return -1; + pa_assert(frames != 0); + + if (PA_UNLIKELY(frames < 0)) { + + if ((r = try_recover(u, "snd_pcm_writei", n)) == 0) + continue; + + return r; } - } - u->memchunk.index += t * u->frame_size; - u->memchunk.length -= t * u->frame_size; + u->memchunk.index += frames * u->frame_size; + u->memchunk.length -= frames * u->frame_size; - if (u->memchunk.length <= 0) { - pa_memblock_unref(u->memchunk.memblock); - pa_memchunk_reset(&u->memchunk); - } + if (u->memchunk.length <= 0) { + pa_memblock_unref(u->memchunk.memblock); + pa_memchunk_reset(&u->memchunk); + } + + work_done = 1; + + u->frame_index += frames; + u->since_start += frames * u->frame_size; - work_done = 1; +/* pa_log_debug("wrote %lu frames", (unsigned long) frames); */ - if (t * u->frame_size >= (unsigned) l) - return work_done; + if (frames >= n) + break; + + n -= frames; + } } + + *sleep_usec = pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) - process_usec; + return work_done; } -static pa_usec_t sink_get_latency(struct userdata *u) { - pa_usec_t r = 0; - snd_pcm_status_t *status; - snd_pcm_sframes_t frames = 0; +static void update_smoother(struct userdata *u) { + snd_pcm_sframes_t delay = 0; + int64_t frames; int err; + pa_usec_t now1, now2; +/* struct timeval timestamp; */ + snd_pcm_status_t *status; snd_pcm_status_alloca(&status); pa_assert(u); pa_assert(u->pcm_handle); - if ((err = snd_pcm_status(u->pcm_handle, status)) < 0) - pa_log("Failed to get delay: %s", snd_strerror(err)); - else - frames = snd_pcm_status_get_delay(status); + /* Let's update the time smoother */ + + snd_pcm_hwsync(u->pcm_handle); + snd_pcm_avail_update(u->pcm_handle); + +/* if (PA_UNLIKELY((err = snd_pcm_status(u->pcm_handle, status)) < 0)) { */ +/* pa_log("Failed to query DSP status data: %s", snd_strerror(err)); */ +/* return; */ +/* } */ + +/* delay = snd_pcm_status_get_delay(status); */ + + if (PA_UNLIKELY((err = snd_pcm_delay(u->pcm_handle, &delay)) < 0)) { + pa_log("Failed to query DSP status data: %s", snd_strerror(err)); + return; + } + + frames = u->frame_index - delay; + +/* pa_log_debug("frame_index = %llu, delay = %llu, p = %llu", (unsigned long long) u->frame_index, (unsigned long long) delay, (unsigned long long) frames); */ + +/* snd_pcm_status_get_tstamp(status, ×tamp); */ +/* pa_rtclock_from_wallclock(×tamp); */ +/* now1 = pa_timeval_load(×tamp); */ + + now1 = pa_rtclock_usec(); + now2 = pa_bytes_to_usec(frames * u->frame_size, &u->sink->sample_spec); + pa_smoother_put(u->smoother, now1, now2); +} + +static pa_usec_t sink_get_latency(struct userdata *u) { + pa_usec_t r = 0; + int64_t delay; + pa_usec_t now1, now2; + + pa_assert(u); + + now1 = pa_rtclock_usec(); + now2 = pa_smoother_get(u->smoother, now1); + + delay = (int64_t) pa_bytes_to_usec(u->frame_index * u->frame_size, &u->sink->sample_spec) - (int64_t) now2; - if (frames > 0) - r = pa_bytes_to_usec(frames * u->frame_size, &u->sink->sample_spec); + if (delay > 0) + r = (pa_usec_t) delay; if (u->memchunk.memblock) r += pa_bytes_to_usec(u->memchunk.length, &u->sink->sample_spec); @@ -312,28 +518,14 @@ static pa_usec_t sink_get_latency(struct userdata *u) { } static int build_pollfd(struct userdata *u) { - int err; - struct pollfd *pollfd; - int n; - pa_assert(u); pa_assert(u->pcm_handle); - if ((n = snd_pcm_poll_descriptors_count(u->pcm_handle)) < 0) { - pa_log("snd_pcm_poll_descriptors_count() failed: %s", snd_strerror(n)); - return -1; - } - if (u->alsa_rtpoll_item) pa_rtpoll_item_free(u->alsa_rtpoll_item); - u->alsa_rtpoll_item = pa_rtpoll_item_new(u->rtpoll, PA_RTPOLL_NEVER, n); - pollfd = pa_rtpoll_item_get_pollfd(u->alsa_rtpoll_item, NULL); - - if ((err = snd_pcm_poll_descriptors(u->pcm_handle, pollfd, n)) < 0) { - pa_log("snd_pcm_poll_descriptors() failed: %s", snd_strerror(err)); + if (!(u->alsa_rtpoll_item = pa_alsa_build_pollfd(u->pcm_handle, u->rtpoll))) return -1; - } return 0; } @@ -342,6 +534,8 @@ static int suspend(struct userdata *u) { pa_assert(u); pa_assert(u->pcm_handle); + pa_smoother_pause(u->smoother, pa_rtclock_usec()); + /* Let's suspend */ snd_pcm_drain(u->pcm_handle); snd_pcm_close(u->pcm_handle); @@ -357,10 +551,64 @@ static int suspend(struct userdata *u) { return 0; } +static int update_sw_params(struct userdata *u) { + snd_pcm_uframes_t avail_min; + int err; + + pa_assert(u); + + /* Use the full buffer if noone asked us for anything specific */ + u->hwbuf_unused_frames = 0; + + if (u->use_tsched) { + pa_usec_t latency; + + if ((latency = pa_sink_get_requested_latency_within_thread(u->sink)) != (pa_usec_t) -1) { + size_t b; + + pa_log_debug("latency set to %0.2f", (double) latency / PA_USEC_PER_MSEC); + + b = pa_usec_to_bytes(latency, &u->sink->sample_spec); + + /* We need at least one sample in our buffer */ + + if (PA_UNLIKELY(b < u->frame_size)) + b = u->frame_size; + + u->hwbuf_unused_frames = + PA_LIKELY(b < u->hwbuf_size) ? + ((u->hwbuf_size - b) / u->frame_size) : 0; + + fix_tsched_watermark(u); + } + } + + pa_log_debug("hwbuf_unused_frames=%lu", (unsigned long) u->hwbuf_unused_frames); + + /* We need at last one frame in the used part of the buffer */ + avail_min = u->hwbuf_unused_frames + 1; + + if (u->use_tsched) { + pa_usec_t sleep_usec, process_usec; + + hw_sleep_time(u, &sleep_usec, &process_usec); + avail_min += pa_usec_to_bytes(sleep_usec, &u->sink->sample_spec); + } + + pa_log_debug("setting avail_min=%lu", (unsigned long) avail_min); + + if ((err = pa_alsa_set_sw_params(u->pcm_handle, avail_min)) < 0) { + pa_log("Failed to set software parameters: %s", snd_strerror(err)); + return err; + } + + return 0; +} + static int unsuspend(struct userdata *u) { pa_sample_spec ss; int err; - pa_bool_t b; + pa_bool_t b, d; unsigned nfrags; snd_pcm_uframes_t period_size; @@ -379,13 +627,14 @@ static int unsuspend(struct userdata *u) { nfrags = u->nfragments; period_size = u->fragment_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, &b, TRUE)) < 0) { + if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &nfrags, &period_size, u->hwbuf_size / u->frame_size, &b, &d, TRUE)) < 0) { pa_log("Failed to set hardware parameters: %s", snd_strerror(err)); goto fail; } - if (b != u->use_mmap) { + if (b != u->use_mmap || d != u->use_tsched) { pa_log_warn("Resume failed, couldn't get original access mode."); goto fail; } @@ -400,10 +649,8 @@ static int unsuspend(struct userdata *u) { goto fail; } - if ((err = pa_alsa_set_sw_params(u->pcm_handle)) < 0) { - pa_log("Failed to set software parameters: %s", snd_strerror(err)); + if (update_sw_params(u) < 0) goto fail; - } if (build_pollfd(u) < 0) goto fail; @@ -411,6 +658,7 @@ static int unsuspend(struct userdata *u) { /* FIXME: We need to reload the volume somehow */ u->first = TRUE; + u->since_start = 0; pa_log_info("Resumed successfully..."); @@ -446,7 +694,7 @@ static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offse switch ((pa_sink_state_t) PA_PTR_TO_UINT(data)) { case PA_SINK_SUSPENDED: - pa_assert(PA_SINK_OPENED(u->sink->thread_info.state)); + pa_assert(PA_SINK_IS_OPENED(u->sink->thread_info.state)); if (suspend(u) < 0) return -1; @@ -505,18 +753,24 @@ static int sink_get_volume_cb(pa_sink *s) { pa_assert(u->mixer_elem); for (i = 0; i < s->sample_spec.channels; i++) { - long set_vol, vol; + long alsa_vol; pa_assert(snd_mixer_selem_has_playback_channel(u->mixer_elem, u->mixer_map[i])); - if ((err = snd_mixer_selem_get_playback_volume(u->mixer_elem, u->mixer_map[i], &vol)) < 0) - goto fail; + if (u->hw_dB_supported) { - set_vol = (long) roundf(((float) s->volume.values[i] * (u->hw_volume_max - u->hw_volume_min)) / PA_VOLUME_NORM) + u->hw_volume_min; + if ((err = snd_mixer_selem_get_playback_dB(u->mixer_elem, u->mixer_map[i], &alsa_vol)) >= 0) { + s->volume.values[i] = pa_sw_volume_from_dB(alsa_vol / 100.0); + continue; + } + + u->hw_dB_supported = FALSE; + } + + if ((err = snd_mixer_selem_get_playback_volume(u->mixer_elem, u->mixer_map[i], &alsa_vol)) < 0) + goto fail; - /* Try to avoid superfluous volume changes */ - if (set_vol != vol) - s->volume.values[i] = (pa_volume_t) roundf(((float) (vol - u->hw_volume_min) * PA_VOLUME_NORM) / (u->hw_volume_max - u->hw_volume_min)); + s->volume.values[i] = (pa_volume_t) roundf(((float) (alsa_vol - u->hw_volume_min) * PA_VOLUME_NORM) / (u->hw_volume_max - u->hw_volume_min)); } return 0; @@ -524,8 +778,6 @@ static int sink_get_volume_cb(pa_sink *s) { fail: pa_log_error("Unable to read volume: %s", snd_strerror(err)); - s->get_volume = NULL; - s->set_volume = NULL; return -1; } @@ -543,15 +795,32 @@ static int sink_set_volume_cb(pa_sink *s) { pa_assert(snd_mixer_selem_has_playback_channel(u->mixer_elem, u->mixer_map[i])); - vol = s->volume.values[i]; + vol = PA_MIN(s->volume.values[i], PA_VOLUME_NORM); - if (vol > PA_VOLUME_NORM) - vol = PA_VOLUME_NORM; + if (u->hw_dB_supported) { + alsa_vol = (long) (pa_sw_volume_to_dB(vol) * 100); + alsa_vol = PA_CLAMP_UNLIKELY(alsa_vol, u->hw_dB_min, u->hw_dB_max); + + if ((err = snd_mixer_selem_set_playback_dB(u->mixer_elem, u->mixer_map[i], alsa_vol, -1)) >= 0) { + + if (snd_mixer_selem_get_playback_dB(u->mixer_elem, u->mixer_map[i], &alsa_vol) >= 0) + s->volume.values[i] = pa_sw_volume_from_dB(alsa_vol / 100.0); + + continue; + } + + u->hw_dB_supported = FALSE; + + } alsa_vol = (long) roundf(((float) vol * (u->hw_volume_max - u->hw_volume_min)) / PA_VOLUME_NORM) + u->hw_volume_min; + alsa_vol = PA_CLAMP_UNLIKELY(alsa_vol, u->hw_volume_min, u->hw_volume_max); if ((err = snd_mixer_selem_set_playback_volume(u->mixer_elem, u->mixer_map[i], alsa_vol)) < 0) goto fail; + + if (snd_mixer_selem_get_playback_volume(u->mixer_elem, u->mixer_map[i], &alsa_vol) >= 0) + s->volume.values[i] = (pa_volume_t) roundf(((float) (alsa_vol - u->hw_volume_min) * PA_VOLUME_NORM) / (u->hw_volume_max - u->hw_volume_min)); } return 0; @@ -559,8 +828,6 @@ static int sink_set_volume_cb(pa_sink *s) { fail: pa_log_error("Unable to set volume: %s", snd_strerror(err)); - s->get_volume = NULL; - s->set_volume = NULL; return -1; } @@ -573,9 +840,6 @@ static int sink_get_mute_cb(pa_sink *s) { if ((err = snd_mixer_selem_get_playback_switch(u->mixer_elem, 0, &sw)) < 0) { pa_log_error("Unable to get switch: %s", snd_strerror(err)); - - s->get_mute = NULL; - s->set_mute = NULL; return -1; } @@ -593,12 +857,90 @@ static int sink_set_mute_cb(pa_sink *s) { if ((err = snd_mixer_selem_set_playback_switch_all(u->mixer_elem, !s->muted)) < 0) { pa_log_error("Unable to set switch: %s", snd_strerror(err)); + return -1; + } + + return 0; +} - s->get_mute = NULL; - s->set_mute = NULL; +static void sink_update_requested_latency_cb(pa_sink *s) { + struct userdata *u = s->userdata; + snd_pcm_sframes_t before; + pa_assert(u); + + if (!u->pcm_handle) + return; + + before = u->hwbuf_unused_frames; + update_sw_params(u); + + /* Let's check whether we now use only a smaller part of the + buffer then before. If so, we need to make sure that subsequent + rewinds are relative to the new maxium fill level and not to the + current fill level. Thus, let's do a full rewind once, to clear + things up. */ + + if (u->hwbuf_unused_frames > before) { + pa_log_debug("Requesting rewind due to latency change."); + pa_sink_request_rewind(s, 0); + } +} + +static int process_rewind(struct userdata *u) { + snd_pcm_sframes_t unused; + size_t rewind_nbytes, unused_nbytes, limit_nbytes; + pa_assert(u); + + /* Figure out how much we shall rewind and reset the counter */ + rewind_nbytes = u->sink->thread_info.rewind_nbytes; + u->sink->thread_info.rewind_nbytes = 0; + + pa_assert(rewind_nbytes > 0); + pa_log_debug("Requested to rewind %lu bytes.", (unsigned long) rewind_nbytes); + + snd_pcm_hwsync(u->pcm_handle); + if ((unused = snd_pcm_avail_update(u->pcm_handle)) < 0) { + pa_log("snd_pcm_avail_update() failed: %s", snd_strerror(unused)); return -1; } + unused_nbytes = u->tsched_watermark + (size_t) unused * u->frame_size; + + if (u->hwbuf_size > unused_nbytes) + limit_nbytes = u->hwbuf_size - unused_nbytes; + else + limit_nbytes = 0; + + if (rewind_nbytes > limit_nbytes) + rewind_nbytes = limit_nbytes; + + if (rewind_nbytes > 0) { + snd_pcm_sframes_t in_frames, out_frames; + + pa_log_debug("Limited to %lu bytes.", (unsigned long) rewind_nbytes); + + in_frames = (snd_pcm_sframes_t) rewind_nbytes / u->frame_size; + pa_log_debug("before: %lu", (unsigned long) in_frames); + if ((out_frames = snd_pcm_rewind(u->pcm_handle, in_frames)) < 0) { + pa_log("snd_pcm_rewind() failed: %s", snd_strerror(out_frames)); + return -1; + } + pa_log_debug("after: %lu", (unsigned long) out_frames); + + rewind_nbytes = out_frames * u->frame_size; + + if (rewind_nbytes <= 0) + pa_log_info("Tried rewind, but was apparently not possible."); + else { + u->frame_index -= out_frames; + pa_log_debug("Rewound %lu bytes.", (unsigned long) rewind_nbytes); + pa_sink_process_rewind(u->sink, rewind_nbytes); + + u->after_rewind = TRUE; + } + } else + pa_log_debug("Mhmm, actually there is nothing to rewind."); + return 0; } @@ -618,25 +960,77 @@ static void thread_func(void *userdata) { for (;;) { int ret; +/* pa_log_debug("loop"); */ + /* Render some data and write it to the dsp */ - if (PA_SINK_OPENED(u->sink->thread_info.state)) { - int work_done = 0; + if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) { + int work_done; + pa_usec_t sleep_usec; - if (u->use_mmap) { - if ((work_done = mmap_write(u)) < 0) - goto fail; - } else { - if ((work_done = unix_write(u)) < 0) + if (u->sink->thread_info.rewind_nbytes > 0) + if (process_rewind(u) < 0) goto fail; + + if (u->use_mmap) + work_done = mmap_write(u, &sleep_usec); + else + work_done = unix_write(u, &sleep_usec); + + if (work_done < 0) + goto fail; + +/* pa_log_debug("work_done = %i", work_done); */ + + if (work_done) { + + if (u->first) { + pa_log_info("Starting playback."); + snd_pcm_start(u->pcm_handle); + + pa_smoother_resume(u->smoother, pa_rtclock_usec()); + } + + update_smoother(u); } - if (work_done && u->first) { - pa_log_info("Starting playback."); - snd_pcm_start(u->pcm_handle); - u->first = FALSE; - continue; + if (u->use_tsched) { + pa_usec_t cusec; + + if (u->since_start <= u->hwbuf_size) { + + /* USB devices on ALSA seem to hit a buffer + * underrun during the first iterations much + * quicker then we calculate here, probably due to + * the transport latency. To accomodate for that + * we artificially decrease the sleep time until + * we have filled the buffer at least once + * completely.*/ + + /*pa_log_debug("Cutting sleep time for the initial iterations by half.");*/ + sleep_usec /= 2; + } + + /* OK, the playback buffer is now full, let's + * calculate when to wake up next */ +/* pa_log_debug("Waking up in %0.2fms (sound card clock).", (double) sleep_usec / PA_USEC_PER_MSEC); */ + + /* Convert from the sound card time domain to the + * system time domain */ + cusec = pa_smoother_translate(u->smoother, pa_rtclock_usec(), sleep_usec); + +/* pa_log_debug("Waking up in %0.2fms (system clock).", (double) cusec / PA_USEC_PER_MSEC); */ + + /* We don't trust the conversion, so we wake up whatever comes first */ + pa_rtpoll_set_timer_relative(u->rtpoll, PA_MIN(sleep_usec, cusec)); } - } + + u->first = FALSE; + u->after_rewind = FALSE; + + } else if (u->use_tsched) + + /* OK, we're in an invalid state, let's disable our timers */ + pa_rtpoll_set_timer_disabled(u->rtpoll); /* Hmm, nothing to do. Let's sleep */ if ((ret = pa_rtpoll_run(u->rtpoll, 1)) < 0) @@ -646,7 +1040,7 @@ static void thread_func(void *userdata) { goto finish; /* Tell ALSA about this and process its response */ - if (PA_SINK_OPENED(u->sink->thread_info.state)) { + if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) { struct pollfd *pollfd; unsigned short revents = 0; int err; @@ -660,43 +1054,15 @@ static void thread_func(void *userdata) { } if (revents & (POLLERR|POLLNVAL|POLLHUP)) { + if (pa_alsa_recover_from_poll(u->pcm_handle, revents) < 0) + goto fail; - if (revents & POLLERR) - pa_log_warn("Got POLLERR from ALSA"); - if (revents & POLLNVAL) - pa_log_warn("Got POLLNVAL from ALSA"); - if (revents & POLLHUP) - pa_log_warn("Got POLLHUP from ALSA"); - - /* Try to recover from this error */ - - switch (snd_pcm_state(u->pcm_handle)) { - - case SND_PCM_STATE_XRUN: - if ((err = snd_pcm_recover(u->pcm_handle, -EPIPE, 1)) != 0) { - pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN: %s", snd_strerror(err)); - goto fail; - } - break; - - case SND_PCM_STATE_SUSPENDED: - if ((err = snd_pcm_recover(u->pcm_handle, -ESTRPIPE, 1)) != 0) { - pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and SUSPENDED: %s", snd_strerror(err)); - goto fail; - } - break; - - default: - - snd_pcm_drop(u->pcm_handle); - - if ((err = snd_pcm_prepare(u->pcm_handle)) < 0) { - pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP with snd_pcm_prepare(): %s", snd_strerror(err)); - goto fail; - } - break; - } + u->first = TRUE; + u->since_start = 0; } + + if (revents && u->use_tsched) + pa_log_debug("Wakeup from ALSA! (%i)", revents); } } @@ -717,21 +1083,24 @@ int pa__init(pa_module*m) { const char *dev_id; pa_sample_spec ss; pa_channel_map map; - uint32_t nfrags, frag_size; - snd_pcm_uframes_t period_size; + uint32_t nfrags, hwbuf_size, frag_size, tsched_size, tsched_watermark; + snd_pcm_uframes_t period_frames, tsched_frames; size_t frame_size; snd_pcm_info_t *pcm_info = NULL; int err; - char *t; const char *name; char *name_buf = NULL; - int namereg_fail; - pa_bool_t use_mmap = TRUE, b; + pa_bool_t namereg_fail; + pa_bool_t use_mmap = TRUE, b, use_tsched = TRUE, d, mixer_reset = TRUE; + pa_usec_t usec; + pa_sink_new_data data; snd_pcm_info_alloca(&pcm_info); pa_assert(m); + pa_alsa_redirect_errors_inc(); + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { pa_log("Failed to parse module arguments"); goto fail; @@ -746,35 +1115,66 @@ int pa__init(pa_module*m) { frame_size = pa_frame_size(&ss); nfrags = m->core->default_n_fragments; - frag_size = pa_usec_to_bytes(m->core->default_fragment_size_msec*1000, &ss); + frag_size = pa_usec_to_bytes(m->core->default_fragment_size_msec*PA_USEC_PER_MSEC, &ss); if (frag_size <= 0) frag_size = frame_size; + tsched_size = pa_usec_to_bytes(DEFAULT_TSCHED_BUFFER_USEC, &ss); + tsched_watermark = pa_usec_to_bytes(DEFAULT_TSCHED_WATERMARK_USEC, &ss); - if (pa_modargs_get_value_u32(ma, "fragments", &nfrags) < 0 || pa_modargs_get_value_u32(ma, "fragment_size", &frag_size) < 0) { + if (pa_modargs_get_value_u32(ma, "fragments", &nfrags) < 0 || + pa_modargs_get_value_u32(ma, "fragment_size", &frag_size) < 0 || + pa_modargs_get_value_u32(ma, "tsched_buffer_size", &tsched_size) < 0 || + pa_modargs_get_value_u32(ma, "tsched_buffer_watermark", &tsched_watermark) < 0) { pa_log("Failed to parse buffer metrics"); goto fail; } - period_size = frag_size/frame_size; + + hwbuf_size = frag_size * nfrags; + period_frames = frag_size/frame_size; + tsched_frames = tsched_size/frame_size; if (pa_modargs_get_value_boolean(ma, "mmap", &use_mmap) < 0) { pa_log("Failed to parse mmap argument."); goto fail; } + if (pa_modargs_get_value_boolean(ma, "tsched", &use_tsched) < 0) { + pa_log("Failed to parse timer_scheduling argument."); + goto fail; + } + + if (use_tsched && !pa_rtclock_hrtimer()) { + pa_log("Disabling timer-based scheduling because high-resolution timers are not available from the kernel."); + use_tsched = FALSE; + } + + if (pa_modargs_get_value_boolean(ma, "mixer_reset", &mixer_reset) < 0) { + pa_log("Failed to parse mixer_reset argument."); + goto fail; + } + u = pa_xnew0(struct userdata, 1); u->core = m->core; u->module = m; m->userdata = u; u->use_mmap = use_mmap; + u->use_tsched = use_tsched; u->first = TRUE; - pa_thread_mq_init(&u->thread_mq, m->core->mainloop); + u->since_start = 0; + u->after_rewind = FALSE; u->rtpoll = pa_rtpoll_new(); + pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll); u->alsa_rtpoll_item = NULL; - pa_rtpoll_item_new_asyncmsgq(u->rtpoll, PA_RTPOLL_EARLY, u->thread_mq.inq); + + u->smoother = pa_smoother_new(DEFAULT_TSCHED_BUFFER_USEC*2, DEFAULT_TSCHED_BUFFER_USEC*2, TRUE, 5); + usec = pa_rtclock_usec(); + pa_smoother_set_time_offset(u->smoother, usec); + pa_smoother_pause(u->smoother, usec); snd_config_update_free_global(); b = use_mmap; + d = use_tsched; if ((dev_id = pa_modargs_get_value(ma, "device_id", NULL))) { @@ -783,8 +1183,8 @@ int pa__init(pa_module*m) { &u->device_name, &ss, &map, SND_PCM_STREAM_PLAYBACK, - &nfrags, &period_size, - &b))) + &nfrags, &period_frames, tsched_frames, + &b, &d))) goto fail; @@ -795,8 +1195,8 @@ int pa__init(pa_module*m) { &u->device_name, &ss, &map, SND_PCM_STREAM_PLAYBACK, - &nfrags, &period_size, - &b))) + &nfrags, &period_frames, tsched_frames, + &b, &d))) goto fail; } @@ -806,22 +1206,25 @@ int pa__init(pa_module*m) { if (use_mmap && !b) { pa_log_info("Device doesn't support mmap(), falling back to UNIX read/write mode."); - u->use_mmap = use_mmap = b; + u->use_mmap = use_mmap = FALSE; + } + + if (use_tsched && (!b || !d)) { + pa_log_info("Cannot enabled timer-based scheduling, falling back to sound IRQ scheduling."); + u->use_tsched = use_tsched = FALSE; } if (u->use_mmap) pa_log_info("Successfully enabled mmap() mode."); + if (u->use_tsched) + pa_log_info("Successfully enabled timer-based scheduling mode."); + if ((err = snd_pcm_info(u->pcm_handle, pcm_info)) < 0) { pa_log("Error fetching PCM info: %s", snd_strerror(err)); goto fail; } - if ((err = pa_alsa_set_sw_params(u->pcm_handle)) < 0) { - pa_log("Failed to set software parameters: %s", snd_strerror(err)); - goto fail; - } - /* ALSA might tweak the sample spec, so recalculate the frame size */ frame_size = pa_frame_size(&ss); @@ -833,13 +1236,24 @@ int pa__init(pa_module*m) { if (pa_alsa_prepare_mixer(u->mixer_handle, u->device_name) >= 0) found = TRUE; else { - char *md = pa_sprintf_malloc("hw:%s", dev_id); + snd_pcm_info_t *info; + + snd_pcm_info_alloca(&info); - if (strcmp(u->device_name, md)) - if (pa_alsa_prepare_mixer(u->mixer_handle, md) >= 0) - found = TRUE; + if (snd_pcm_info(u->pcm_handle, info) >= 0) { + char *md; + int card; - pa_xfree(md); + if ((card = snd_pcm_info_get_card(info)) >= 0) { + + md = pa_sprintf_malloc("hw:%i", card); + + if (strcmp(u->device_name, md)) + if (pa_alsa_prepare_mixer(u->mixer_handle, md) >= 0) + found = TRUE; + pa_xfree(md); + } + } } if (found) @@ -853,13 +1267,28 @@ int pa__init(pa_module*m) { } if ((name = pa_modargs_get_value(ma, "sink_name", NULL))) - namereg_fail = 1; + namereg_fail = TRUE; else { name = name_buf = pa_sprintf_malloc("alsa_output.%s", u->device_name); - namereg_fail = 0; + namereg_fail = FALSE; } - u->sink = pa_sink_new(m->core, __FILE__, name, namereg_fail, &ss, &map); + pa_sink_new_data_init(&data); + data.driver = __FILE__; + data.module = m; + pa_sink_new_data_set_name(&data, name); + data.namereg_fail = namereg_fail; + pa_sink_new_data_set_sample_spec(&data, &ss); + pa_sink_new_data_set_channel_map(&data, &map); + + pa_alsa_init_proplist(data.proplist, pcm_info); + 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_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")); + + u->sink = pa_sink_new(m->core, &data, PA_SINK_HARDWARE|PA_SINK_LATENCY); + pa_sink_new_data_done(&data); pa_xfree(name_buf); if (!u->sink) { @@ -868,26 +1297,41 @@ int pa__init(pa_module*m) { } u->sink->parent.process_msg = sink_process_msg; + u->sink->update_requested_latency = sink_update_requested_latency_cb; u->sink->userdata = u; - pa_sink_set_module(u->sink, m); pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq); pa_sink_set_rtpoll(u->sink, u->rtpoll); - pa_sink_set_description(u->sink, t = pa_sprintf_malloc( - "ALSA PCM on %s (%s)%s", - u->device_name, - snd_pcm_info_get_name(pcm_info), - use_mmap ? " via DMA" : "")); - pa_xfree(t); - - u->sink->flags = PA_SINK_HARDWARE|PA_SINK_LATENCY; u->frame_size = frame_size; - u->fragment_size = frag_size = period_size * frame_size; + u->fragment_size = frag_size = period_frames * frame_size; u->nfragments = nfrags; u->hwbuf_size = u->fragment_size * nfrags; - - pa_log_info("Using %u fragments of size %lu bytes.", nfrags, (long unsigned) u->fragment_size); + u->hwbuf_unused_frames = 0; + u->tsched_watermark = tsched_watermark; + u->frame_index = 0; + u->hw_dB_supported = FALSE; + u->hw_dB_min = u->hw_dB_max = 0; + u->hw_volume_min = u->hw_volume_max = 0; + + if (use_tsched) + fix_tsched_watermark(u); + + u->sink->thread_info.max_rewind = use_tsched ? u->hwbuf_size : 0; + u->sink->max_latency = pa_bytes_to_usec(u->hwbuf_size, &ss); + if (!use_tsched) + u->sink->min_latency = u->sink->max_latency; + + pa_log_info("Using %u fragments of size %lu bytes, buffer time is %0.2fms", + nfrags, (long unsigned) u->fragment_size, + (double) pa_bytes_to_usec(u->hwbuf_size, &ss) / PA_USEC_PER_MSEC); + + if (use_tsched) + pa_log_info("Time scheduling watermark is %0.2fms", + (double) pa_bytes_to_usec(u->tsched_watermark, &ss) / PA_USEC_PER_MSEC); + + if (update_sw_params(u) < 0) + goto fail; pa_memchunk_reset(&u->memchunk); @@ -895,17 +1339,74 @@ int pa__init(pa_module*m) { pa_assert(u->mixer_elem); if (snd_mixer_selem_has_playback_volume(u->mixer_elem)) - if (pa_alsa_calc_mixer_map(u->mixer_elem, &map, u->mixer_map, TRUE) >= 0) { - u->sink->get_volume = sink_get_volume_cb; - u->sink->set_volume = sink_set_volume_cb; - snd_mixer_selem_get_playback_volume_range(u->mixer_elem, &u->hw_volume_min, &u->hw_volume_max); - u->sink->flags |= PA_SINK_HW_VOLUME_CTRL; + + if (pa_alsa_calc_mixer_map(u->mixer_elem, &map, u->mixer_map, TRUE) >= 0 && + snd_mixer_selem_get_playback_volume_range(u->mixer_elem, &u->hw_volume_min, &u->hw_volume_max) >= 0) { + + pa_bool_t suitable = TRUE; + + pa_log_info("Volume ranges from %li to %li.", u->hw_volume_min, u->hw_volume_max); + + if (u->hw_volume_min > u->hw_volume_max) { + + pa_log_info("Minimal volume %li larger than maximum volume %li. Strange stuff Falling back to software volume control.", u->hw_volume_min, u->hw_volume_max); + suitable = FALSE; + + } else if (u->hw_volume_max - u->hw_volume_min < 3) { + + pa_log_info("Device has less than 4 volume levels. Falling back to software volume control."); + suitable = FALSE; + + } else if (snd_mixer_selem_get_playback_dB_range(u->mixer_elem, &u->hw_dB_min, &u->hw_dB_max) >= 0) { + + /* u->hw_dB_max = 0; u->hw_dB_min = -3000; Use this to make valgrind shut up */ + + pa_log_info("Volume ranges from %0.2f dB to %0.2f dB.", u->hw_dB_min/100.0, u->hw_dB_max/100.0); + + /* Let's see if this thing actually is useful for muting */ + if (u->hw_dB_min > -6000) { + pa_log_info("Device cannot attenuate for more than -60 dB (only %0.2f dB supported), falling back to software volume control.", ((double) u->hw_dB_min) / 100); + + suitable = FALSE; + } else if (u->hw_dB_max < 0) { + + pa_log_info("Device is still attenuated at maximum volume setting (%0.2f dB is maximum). Strange stuff. Falling back to software volume control.", ((double) u->hw_dB_max) / 100); + suitable = FALSE; + + } else if (u->hw_dB_min >= u->hw_dB_max) { + + pa_log_info("Minimal dB (%0.2f) larger or equal to maximum dB (%0.2f). Strange stuff. Falling back to software volume control.", ((double) u->hw_dB_min) / 100, ((double) u->hw_dB_max) / 100); + suitable = FALSE; + + } else { + + if (u->hw_dB_max > 0) { + /* dB > 0 means overamplification, and clipping, we don't want that here */ + pa_log_info("Device can do overamplification for %0.2f dB. Limiting to 0 db", ((double) u->hw_dB_max) / 100); + u->hw_dB_max = 0; + } + + u->hw_dB_supported = TRUE; + } + } + + if (suitable) { + u->sink->get_volume = sink_get_volume_cb; + u->sink->set_volume = sink_set_volume_cb; + u->sink->flags |= PA_SINK_HW_VOLUME_CTRL | (u->hw_dB_supported ? PA_SINK_DECIBEL_VOLUME : 0); + pa_log_info("Using hardware volume control. Hardware dB scale %s.", u->hw_dB_supported ? "supported" : "not supported"); + + } else if (mixer_reset) { + pa_log_info("Using software volume control. Trying to reset sound card to 0 dB."); + pa_alsa_0dB_playback(u->mixer_elem); + } else + pa_log_info("Using software volume control. Leaving hw mixer controls untouched."); } if (snd_mixer_selem_has_playback_switch(u->mixer_elem)) { u->sink->get_mute = sink_get_mute_cb; u->sink->set_mute = sink_set_mute_cb; - u->sink->flags |= PA_SINK_HW_VOLUME_CTRL; + u->sink->flags |= PA_SINK_HW_MUTE_CTRL; } u->mixer_fdl = pa_alsa_fdlist_new(); @@ -920,16 +1421,29 @@ int pa__init(pa_module*m) { } else u->mixer_fdl = NULL; + pa_alsa_dump(u->pcm_handle); + if (!(u->thread = pa_thread_new(thread_func, u))) { pa_log("Failed to create thread."); goto fail; } /* Get initial mixer settings */ - if (u->sink->get_volume) - u->sink->get_volume(u->sink); - if (u->sink->get_mute) - u->sink->get_mute(u->sink); + if (data.volume_is_set) { + if (u->sink->set_volume) + u->sink->set_volume(u->sink); + } else { + if (u->sink->get_volume) + u->sink->get_volume(u->sink); + } + + if (data.muted_is_set) { + if (u->sink->set_mute) + u->sink->set_mute(u->sink); + } else { + if (u->sink->get_mute) + u->sink->get_mute(u->sink); + } pa_sink_put(u->sink); @@ -952,8 +1466,10 @@ void pa__done(pa_module*m) { pa_assert(m); - if (!(u = m->userdata)) + if (!(u = m->userdata)) { + pa_alsa_redirect_errors_dec(); return; + } if (u->sink) pa_sink_unlink(u->sink); @@ -988,8 +1504,13 @@ void pa__done(pa_module*m) { snd_pcm_close(u->pcm_handle); } + if (u->smoother) + pa_smoother_free(u->smoother); + pa_xfree(u->device_name); pa_xfree(u); snd_config_update_free_global(); + + pa_alsa_redirect_errors_dec(); } -- cgit