| /*** | |
| This file is part of PulseAudio. | |
| Copyright 2004-2009 Lennart Poettering | |
| Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB | |
| PulseAudio is free software; you can redistribute it and/or modify | |
| it under the terms of the GNU Lesser General Public License as published | |
| by the Free Software Foundation; either version 2.1 of the License, | |
| or (at your option) any later version. | |
| PulseAudio is distributed in the hope that it will be useful, but | |
| WITHOUT ANY WARRANTY; without even the implied warranty of | |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| General Public License for more details. | |
| You should have received a copy of the GNU Lesser General Public License | |
| along with PulseAudio; if not, see <http://www.gnu.org/licenses/>. | |
| ***/ | |
| #ifdef HAVE_CONFIG_H | |
| #include <config.h> | |
| #endif | |
| #include <sys/types.h> | |
| #include <alsa/asoundlib.h> | |
| #include <pulse/sample.h> | |
| #include <pulse/xmalloc.h> | |
| #include <pulse/timeval.h> | |
| #include <pulse/util.h> | |
| #include <pulse/utf8.h> | |
| #include <pulsecore/i18n.h> | |
| #include <pulsecore/log.h> | |
| #include <pulsecore/macro.h> | |
| #include <pulsecore/core-util.h> | |
| #include <pulsecore/atomic.h> | |
| #include <pulsecore/core-error.h> | |
| #include <pulsecore/thread.h> | |
| #include <pulsecore/conf-parser.h> | |
| #include <pulsecore/core-rtclock.h> | |
| #include <pulsecore/strbuf.h> | |
| #include "alsa-util.h" | |
| #include "alsa-mixer.h" | |
| #ifdef HAVE_UDEV | |
| #include <modules/udev-util.h> | |
| #endif | |
| static int set_format(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, pa_sample_format_t *f) { | |
| static const snd_pcm_format_t format_trans[] = { | |
| [PA_SAMPLE_U8] = SND_PCM_FORMAT_U8, | |
| [PA_SAMPLE_ALAW] = SND_PCM_FORMAT_A_LAW, | |
| [PA_SAMPLE_ULAW] = SND_PCM_FORMAT_MU_LAW, | |
| [PA_SAMPLE_S16LE] = SND_PCM_FORMAT_S16_LE, | |
| [PA_SAMPLE_S16BE] = SND_PCM_FORMAT_S16_BE, | |
| [PA_SAMPLE_FLOAT32LE] = SND_PCM_FORMAT_FLOAT_LE, | |
| [PA_SAMPLE_FLOAT32BE] = SND_PCM_FORMAT_FLOAT_BE, | |
| [PA_SAMPLE_S32LE] = SND_PCM_FORMAT_S32_LE, | |
| [PA_SAMPLE_S32BE] = SND_PCM_FORMAT_S32_BE, | |
| [PA_SAMPLE_S24LE] = SND_PCM_FORMAT_S24_3LE, | |
| [PA_SAMPLE_S24BE] = SND_PCM_FORMAT_S24_3BE, | |
| [PA_SAMPLE_S24_32LE] = SND_PCM_FORMAT_S24_LE, | |
| [PA_SAMPLE_S24_32BE] = SND_PCM_FORMAT_S24_BE, | |
| }; | |
| static const pa_sample_format_t try_order[] = { | |
| PA_SAMPLE_FLOAT32NE, | |
| PA_SAMPLE_FLOAT32RE, | |
| PA_SAMPLE_S32NE, | |
| PA_SAMPLE_S32RE, | |
| PA_SAMPLE_S24_32NE, | |
| PA_SAMPLE_S24_32RE, | |
| PA_SAMPLE_S24NE, | |
| PA_SAMPLE_S24RE, | |
| PA_SAMPLE_S16NE, | |
| PA_SAMPLE_S16RE, | |
| PA_SAMPLE_ALAW, | |
| PA_SAMPLE_ULAW, | |
| PA_SAMPLE_U8 | |
| }; | |
| unsigned i; | |
| int ret; | |
| pa_assert(pcm_handle); | |
| pa_assert(hwparams); | |
| pa_assert(f); | |
| if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0) | |
| return ret; | |
| pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s", | |
| snd_pcm_format_description(format_trans[*f]), | |
| pa_alsa_strerror(ret)); | |
| if (*f == PA_SAMPLE_FLOAT32BE) | |
| *f = PA_SAMPLE_FLOAT32LE; | |
| else if (*f == PA_SAMPLE_FLOAT32LE) | |
| *f = PA_SAMPLE_FLOAT32BE; | |
| else if (*f == PA_SAMPLE_S24BE) | |
| *f = PA_SAMPLE_S24LE; | |
| else if (*f == PA_SAMPLE_S24LE) | |
| *f = PA_SAMPLE_S24BE; | |
| else if (*f == PA_SAMPLE_S24_32BE) | |
| *f = PA_SAMPLE_S24_32LE; | |
| else if (*f == PA_SAMPLE_S24_32LE) | |
| *f = PA_SAMPLE_S24_32BE; | |
| else if (*f == PA_SAMPLE_S16BE) | |
| *f = PA_SAMPLE_S16LE; | |
| else if (*f == PA_SAMPLE_S16LE) | |
| *f = PA_SAMPLE_S16BE; | |
| else if (*f == PA_SAMPLE_S32BE) | |
| *f = PA_SAMPLE_S32LE; | |
| else if (*f == PA_SAMPLE_S32LE) | |
| *f = PA_SAMPLE_S32BE; | |
| else | |
| goto try_auto; | |
| if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0) | |
| return ret; | |
| pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s", | |
| snd_pcm_format_description(format_trans[*f]), | |
| pa_alsa_strerror(ret)); | |
| try_auto: | |
| for (i = 0; i < PA_ELEMENTSOF(try_order); i++) { | |
| *f = try_order[i]; | |
| if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0) | |
| return ret; | |
| pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s", | |
| snd_pcm_format_description(format_trans[*f]), | |
| pa_alsa_strerror(ret)); | |
| } | |
| return -1; | |
| } | |
| static int set_period_size(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, snd_pcm_uframes_t size) { | |
| snd_pcm_uframes_t s; | |
| int d, ret; | |
| pa_assert(pcm_handle); | |
| pa_assert(hwparams); | |
| s = size; | |
| d = 0; | |
| if (snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, &s, &d) < 0) { | |
| s = size; | |
| d = -1; | |
| if (snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, &s, &d) < 0) { | |
| s = size; | |
| d = 1; | |
| if ((ret = snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, &s, &d)) < 0) { | |
| pa_log_info("snd_pcm_hw_params_set_period_size_near() failed: %s", pa_alsa_strerror(ret)); | |
| return ret; | |
| } | |
| } | |
| } | |
| return 0; | |
| } | |
| static int set_buffer_size(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, snd_pcm_uframes_t size) { | |
| int ret; | |
| pa_assert(pcm_handle); | |
| pa_assert(hwparams); | |
| if ((ret = snd_pcm_hw_params_set_buffer_size_near(pcm_handle, hwparams, &size)) < 0) { | |
| pa_log_info("snd_pcm_hw_params_set_buffer_size_near() failed: %s", pa_alsa_strerror(ret)); | |
| return ret; | |
| } | |
| return 0; | |
| } | |
| static void check_access(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, bool use_mmap) { | |
| if ((use_mmap && !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED)) || | |
| !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) | |
| pa_log_error("Weird, PCM claims to support interleaved access, but snd_pcm_hw_params_set_access() failed."); | |
| if ((use_mmap && !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_NONINTERLEAVED)) || | |
| !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_NONINTERLEAVED)) | |
| pa_log_debug("PCM seems to support non-interleaved access, but PA doesn't."); | |
| else if (use_mmap && !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_COMPLEX)) { | |
| pa_log_debug("PCM seems to support mmapped complex access, but PA doesn't."); | |
| } | |
| } | |
| /* Set the hardware parameters of the given ALSA device. Returns the | |
| * selected fragment settings in *buffer_size and *period_size. Determine | |
| * whether mmap and tsched mode can be enabled. */ | |
| int pa_alsa_set_hw_params( | |
| snd_pcm_t *pcm_handle, | |
| pa_sample_spec *ss, | |
| snd_pcm_uframes_t *period_size, | |
| snd_pcm_uframes_t *buffer_size, | |
| snd_pcm_uframes_t tsched_size, | |
| bool *use_mmap, | |
| bool *use_tsched, | |
| bool require_exact_channel_number) { | |
| int ret = -1; | |
| snd_pcm_hw_params_t *hwparams, *hwparams_copy; | |
| int dir; | |
| snd_pcm_uframes_t _period_size = period_size ? *period_size : 0; | |
| snd_pcm_uframes_t _buffer_size = buffer_size ? *buffer_size : 0; | |
| bool _use_mmap = use_mmap && *use_mmap; | |
| bool _use_tsched = use_tsched && *use_tsched; | |
| pa_sample_spec _ss = *ss; | |
| pa_assert(pcm_handle); | |
| pa_assert(ss); | |
| snd_pcm_hw_params_alloca(&hwparams); | |
| snd_pcm_hw_params_alloca(&hwparams_copy); | |
| if ((ret = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(ret)); | |
| goto finish; | |
| } | |
| if ((ret = snd_pcm_hw_params_set_rate_resample(pcm_handle, hwparams, 0)) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_set_rate_resample() failed: %s", pa_alsa_strerror(ret)); | |
| goto finish; | |
| } | |
| if (_use_mmap) { | |
| if (snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED) < 0) { | |
| /* mmap() didn't work, fall back to interleaved */ | |
| if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_set_access() failed: %s", pa_alsa_strerror(ret)); | |
| check_access(pcm_handle, hwparams, true); | |
| goto finish; | |
| } | |
| _use_mmap = false; | |
| } | |
| } else if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_set_access() failed: %s", pa_alsa_strerror(ret)); | |
| check_access(pcm_handle, hwparams, false); | |
| goto finish; | |
| } | |
| if (!_use_mmap) | |
| _use_tsched = false; | |
| if (!pa_alsa_pcm_is_hw(pcm_handle)) | |
| _use_tsched = false; | |
| /* The PCM pointer is only updated with period granularity */ | |
| if (snd_pcm_hw_params_is_batch(hwparams)) { | |
| bool is_usb = false; | |
| const char *id; | |
| snd_pcm_info_t* pcm_info; | |
| snd_pcm_info_alloca(&pcm_info); | |
| if (snd_pcm_info(pcm_handle, pcm_info) == 0 && | |
| (id = snd_pcm_info_get_id(pcm_info))) { | |
| /* This horrible hack makes sure we don't disable tsched on USB | |
| * devices, which have a low enough transfer size for timer-based | |
| * scheduling to work. This can go away when the ALSA API supprots | |
| * querying the block transfer size. */ | |
| if (pa_streq(id, "USB Audio")) | |
| is_usb = true; | |
| } | |
| if (!is_usb) { | |
| pa_log_info("Disabling tsched mode since BATCH flag is set"); | |
| _use_tsched = false; | |
| } | |
| } | |
| #if (SND_LIB_VERSION >= ((1<<16)|(0<<8)|24)) /* API additions in 1.0.24 */ | |
| if (_use_tsched) { | |
| /* try to disable period wakeups if hardware can do so */ | |
| if (snd_pcm_hw_params_can_disable_period_wakeup(hwparams)) { | |
| if ((ret = snd_pcm_hw_params_set_period_wakeup(pcm_handle, hwparams, false)) < 0) | |
| /* don't bail, keep going with default mode with period wakeups */ | |
| pa_log_debug("snd_pcm_hw_params_set_period_wakeup() failed: %s", pa_alsa_strerror(ret)); | |
| else | |
| pa_log_info("Trying to disable ALSA period wakeups, using timers only"); | |
| } else | |
| pa_log_info("Cannot disable ALSA period wakeups"); | |
| } | |
| #endif | |
| if ((ret = set_format(pcm_handle, hwparams, &_ss.format)) < 0) | |
| goto finish; | |
| if ((ret = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &_ss.rate, NULL)) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_set_rate_near() failed: %s", pa_alsa_strerror(ret)); | |
| goto finish; | |
| } | |
| /* We ignore very small sampling rate deviations */ | |
| if (_ss.rate >= ss->rate*.95 && _ss.rate <= ss->rate*1.05) | |
| _ss.rate = ss->rate; | |
| if (require_exact_channel_number) { | |
| if ((ret = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, _ss.channels)) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_set_channels(%u) failed: %s", _ss.channels, pa_alsa_strerror(ret)); | |
| goto finish; | |
| } | |
| } else { | |
| unsigned int c = _ss.channels; | |
| if ((ret = snd_pcm_hw_params_set_channels_near(pcm_handle, hwparams, &c)) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_set_channels_near(%u) failed: %s", _ss.channels, pa_alsa_strerror(ret)); | |
| goto finish; | |
| } | |
| _ss.channels = c; | |
| } | |
| if (_use_tsched && tsched_size > 0) { | |
| _buffer_size = (snd_pcm_uframes_t) (((uint64_t) tsched_size * _ss.rate) / ss->rate); | |
| _period_size = _buffer_size; | |
| } else { | |
| _period_size = (snd_pcm_uframes_t) (((uint64_t) _period_size * _ss.rate) / ss->rate); | |
| _buffer_size = (snd_pcm_uframes_t) (((uint64_t) _buffer_size * _ss.rate) / ss->rate); | |
| } | |
| if (_buffer_size > 0 || _period_size > 0) { | |
| snd_pcm_uframes_t max_frames = 0; | |
| if ((ret = snd_pcm_hw_params_get_buffer_size_max(hwparams, &max_frames)) < 0) | |
| pa_log_warn("snd_pcm_hw_params_get_buffer_size_max() failed: %s", pa_alsa_strerror(ret)); | |
| else | |
| pa_log_debug("Maximum hw buffer size is %lu ms", (long unsigned) (max_frames * PA_MSEC_PER_SEC / _ss.rate)); | |
| /* Some ALSA drivers really don't like if we set the buffer | |
| * size first and the number of periods second (which would | |
| * make a lot more sense to me). So, try a few combinations | |
| * before we give up. */ | |
| if (_buffer_size > 0 && _period_size > 0) { | |
| snd_pcm_hw_params_copy(hwparams_copy, hwparams); | |
| /* First try: set buffer size first, followed by period size */ | |
| if (set_buffer_size(pcm_handle, hwparams_copy, _buffer_size) >= 0 && | |
| set_period_size(pcm_handle, hwparams_copy, _period_size) >= 0 && | |
| snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) { | |
| pa_log_debug("Set buffer size first (to %lu samples), period size second (to %lu samples).", (unsigned long) _buffer_size, (unsigned long) _period_size); | |
| goto success; | |
| } | |
| snd_pcm_hw_params_copy(hwparams_copy, hwparams); | |
| /* Second try: set period size first, followed by buffer size */ | |
| if (set_period_size(pcm_handle, hwparams_copy, _period_size) >= 0 && | |
| set_buffer_size(pcm_handle, hwparams_copy, _buffer_size) >= 0 && | |
| snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) { | |
| pa_log_debug("Set period size first (to %lu samples), buffer size second (to %lu samples).", (unsigned long) _period_size, (unsigned long) _buffer_size); | |
| goto success; | |
| } | |
| } | |
| if (_buffer_size > 0) { | |
| snd_pcm_hw_params_copy(hwparams_copy, hwparams); | |
| /* Third try: set only buffer size */ | |
| if (set_buffer_size(pcm_handle, hwparams_copy, _buffer_size) >= 0 && | |
| snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) { | |
| pa_log_debug("Set only buffer size (to %lu samples).", (unsigned long) _buffer_size); | |
| goto success; | |
| } | |
| } | |
| if (_period_size > 0) { | |
| snd_pcm_hw_params_copy(hwparams_copy, hwparams); | |
| /* Fourth try: set only period size */ | |
| if (set_period_size(pcm_handle, hwparams_copy, _period_size) >= 0 && | |
| snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) { | |
| pa_log_debug("Set only period size (to %lu samples).", (unsigned long) _period_size); | |
| goto success; | |
| } | |
| } | |
| } | |
| pa_log_debug("Set neither period nor buffer size."); | |
| /* Last chance, set nothing */ | |
| if ((ret = snd_pcm_hw_params(pcm_handle, hwparams)) < 0) { | |
| pa_log_info("snd_pcm_hw_params failed: %s", pa_alsa_strerror(ret)); | |
| goto finish; | |
| } | |
| success: | |
| if (ss->rate != _ss.rate) | |
| pa_log_info("Device %s doesn't support %u Hz, changed to %u Hz.", snd_pcm_name(pcm_handle), ss->rate, _ss.rate); | |
| if (ss->channels != _ss.channels) | |
| pa_log_info("Device %s doesn't support %u channels, changed to %u.", snd_pcm_name(pcm_handle), ss->channels, _ss.channels); | |
| if (ss->format != _ss.format) | |
| pa_log_info("Device %s doesn't support sample format %s, changed to %s.", snd_pcm_name(pcm_handle), pa_sample_format_to_string(ss->format), pa_sample_format_to_string(_ss.format)); | |
| if ((ret = snd_pcm_hw_params_current(pcm_handle, hwparams)) < 0) { | |
| pa_log_info("snd_pcm_hw_params_current() failed: %s", pa_alsa_strerror(ret)); | |
| goto finish; | |
| } | |
| if ((ret = snd_pcm_hw_params_get_period_size(hwparams, &_period_size, &dir)) < 0 || | |
| (ret = snd_pcm_hw_params_get_buffer_size(hwparams, &_buffer_size)) < 0) { | |
| pa_log_info("snd_pcm_hw_params_get_{period|buffer}_size() failed: %s", pa_alsa_strerror(ret)); | |
| goto finish; | |
| } | |
| #if (SND_LIB_VERSION >= ((1<<16)|(0<<8)|24)) /* API additions in 1.0.24 */ | |
| if (_use_tsched) { | |
| unsigned int no_wakeup; | |
| /* see if period wakeups were disabled */ | |
| snd_pcm_hw_params_get_period_wakeup(pcm_handle, hwparams, &no_wakeup); | |
| if (no_wakeup == 0) | |
| pa_log_info("ALSA period wakeups disabled"); | |
| else | |
| pa_log_info("ALSA period wakeups were not disabled"); | |
| } | |
| #endif | |
| ss->rate = _ss.rate; | |
| ss->channels = _ss.channels; | |
| ss->format = _ss.format; | |
| pa_assert(_period_size > 0); | |
| pa_assert(_buffer_size > 0); | |
| if (buffer_size) | |
| *buffer_size = _buffer_size; | |
| if (period_size) | |
| *period_size = _period_size; | |
| if (use_mmap) | |
| *use_mmap = _use_mmap; | |
| if (use_tsched) | |
| *use_tsched = _use_tsched; | |
| ret = 0; | |
| finish: | |
| return ret; | |
| } | |
| int pa_alsa_set_sw_params(snd_pcm_t *pcm, snd_pcm_uframes_t avail_min, bool period_event) { | |
| snd_pcm_sw_params_t *swparams; | |
| snd_pcm_uframes_t boundary; | |
| int err; | |
| pa_assert(pcm); | |
| snd_pcm_sw_params_alloca(&swparams); | |
| if ((err = snd_pcm_sw_params_current(pcm, swparams)) < 0) { | |
| pa_log_warn("Unable to determine current swparams: %s", pa_alsa_strerror(err)); | |
| return err; | |
| } | |
| if ((err = snd_pcm_sw_params_set_period_event(pcm, swparams, period_event)) < 0) { | |
| pa_log_warn("Unable to disable period event: %s", pa_alsa_strerror(err)); | |
| return err; | |
| } | |
| if ((err = snd_pcm_sw_params_set_tstamp_mode(pcm, swparams, SND_PCM_TSTAMP_ENABLE)) < 0) { | |
| pa_log_warn("Unable to enable time stamping: %s", pa_alsa_strerror(err)); | |
| return err; | |
| } | |
| if ((err = snd_pcm_sw_params_get_boundary(swparams, &boundary)) < 0) { | |
| pa_log_warn("Unable to get boundary: %s", pa_alsa_strerror(err)); | |
| return err; | |
| } | |
| if ((err = snd_pcm_sw_params_set_stop_threshold(pcm, swparams, boundary)) < 0) { | |
| pa_log_warn("Unable to set stop threshold: %s", pa_alsa_strerror(err)); | |
| return err; | |
| } | |
| if ((err = snd_pcm_sw_params_set_start_threshold(pcm, swparams, (snd_pcm_uframes_t) -1)) < 0) { | |
| pa_log_warn("Unable to set start threshold: %s", pa_alsa_strerror(err)); | |
| return err; | |
| } | |
| if ((err = snd_pcm_sw_params_set_avail_min(pcm, swparams, avail_min)) < 0) { | |
| pa_log_error("snd_pcm_sw_params_set_avail_min() failed: %s", pa_alsa_strerror(err)); | |
| return err; | |
| } | |
| if ((err = snd_pcm_sw_params(pcm, swparams)) < 0) { | |
| pa_log_warn("Unable to set sw params: %s", pa_alsa_strerror(err)); | |
| return err; | |
| } | |
| return 0; | |
| } | |
| snd_pcm_t *pa_alsa_open_by_device_id_auto( | |
| const char *dev_id, | |
| char **dev, | |
| pa_sample_spec *ss, | |
| pa_channel_map* map, | |
| int mode, | |
| snd_pcm_uframes_t *period_size, | |
| snd_pcm_uframes_t *buffer_size, | |
| snd_pcm_uframes_t tsched_size, | |
| bool *use_mmap, | |
| bool *use_tsched, | |
| pa_sample_format_t **query_supported_formats, | |
| unsigned int **query_supported_rates, | |
| pa_alsa_profile_set *ps, | |
| pa_alsa_mapping **mapping) { | |
| char *d; | |
| snd_pcm_t *pcm_handle; | |
| void *state; | |
| pa_alsa_mapping *m; | |
| pa_assert(dev_id); | |
| pa_assert(dev); | |
| pa_assert(ss); | |
| pa_assert(map); | |
| pa_assert(ps); | |
| /* First we try to find a device string with a superset of the | |
| * requested channel map. We iterate through our device table from | |
| * top to bottom and take the first that matches. If we didn't | |
| * find a working device that way, we iterate backwards, and check | |
| * all devices that do not provide a superset of the requested | |
| * channel map.*/ | |
| PA_HASHMAP_FOREACH(m, ps->mappings, state) { | |
| if (!pa_channel_map_superset(&m->channel_map, map)) | |
| continue; | |
| pa_log_debug("Checking for superset %s (%s)", m->name, m->device_strings[0]); | |
| pcm_handle = pa_alsa_open_by_device_id_mapping( | |
| dev_id, | |
| dev, | |
| ss, | |
| map, | |
| mode, | |
| period_size, | |
| buffer_size, | |
| tsched_size, | |
| use_mmap, | |
| use_tsched, | |
| query_supported_formats, | |
| query_supported_rates, | |
| m); | |
| if (pcm_handle) { | |
| if (mapping) | |
| *mapping = m; | |
| return pcm_handle; | |
| } | |
| } | |
| PA_HASHMAP_FOREACH_BACKWARDS(m, ps->mappings, state) { | |
| if (pa_channel_map_superset(&m->channel_map, map)) | |
| continue; | |
| pa_log_debug("Checking for subset %s (%s)", m->name, m->device_strings[0]); | |
| pcm_handle = pa_alsa_open_by_device_id_mapping( | |
| dev_id, | |
| dev, | |
| ss, | |
| map, | |
| mode, | |
| period_size, | |
| buffer_size, | |
| tsched_size, | |
| use_mmap, | |
| use_tsched, | |
| query_supported_formats, | |
| query_supported_rates, | |
| m); | |
| if (pcm_handle) { | |
| if (mapping) | |
| *mapping = m; | |
| return pcm_handle; | |
| } | |
| } | |
| /* OK, we didn't find any good device, so let's try the raw hw: stuff */ | |
| d = pa_sprintf_malloc("hw:%s", dev_id); | |
| pa_log_debug("Trying %s as last resort...", d); | |
| pcm_handle = pa_alsa_open_by_device_string( | |
| d, | |
| dev, | |
| ss, | |
| map, | |
| mode, | |
| period_size, | |
| buffer_size, | |
| tsched_size, | |
| use_mmap, | |
| use_tsched, | |
| query_supported_formats, | |
| query_supported_rates, | |
| false); | |
| pa_xfree(d); | |
| if (pcm_handle && mapping) | |
| *mapping = NULL; | |
| return pcm_handle; | |
| } | |
| snd_pcm_t *pa_alsa_open_by_device_id_mapping( | |
| const char *dev_id, | |
| char **dev, | |
| pa_sample_spec *ss, | |
| pa_channel_map* map, | |
| int mode, | |
| snd_pcm_uframes_t *period_size, | |
| snd_pcm_uframes_t *buffer_size, | |
| snd_pcm_uframes_t tsched_size, | |
| bool *use_mmap, | |
| bool *use_tsched, | |
| pa_sample_format_t **query_supported_formats, | |
| unsigned int **query_supported_rates, | |
| pa_alsa_mapping *m) { | |
| snd_pcm_t *pcm_handle; | |
| pa_sample_spec try_ss; | |
| pa_channel_map try_map; | |
| pa_assert(dev_id); | |
| pa_assert(dev); | |
| pa_assert(ss); | |
| pa_assert(map); | |
| pa_assert(m); | |
| try_ss.channels = m->channel_map.channels; | |
| try_ss.rate = ss->rate; | |
| try_ss.format = ss->format; | |
| try_map = m->channel_map; | |
| pcm_handle = pa_alsa_open_by_template( | |
| m->device_strings, | |
| dev_id, | |
| dev, | |
| &try_ss, | |
| &try_map, | |
| mode, | |
| period_size, | |
| buffer_size, | |
| tsched_size, | |
| use_mmap, | |
| use_tsched, | |
| query_supported_formats, | |
| query_supported_rates, | |
| pa_channel_map_valid(&m->channel_map) /* Query the channel count if we don't know what we want */); | |
| if (!pcm_handle) | |
| return NULL; | |
| *ss = try_ss; | |
| *map = try_map; | |
| pa_assert(map->channels == ss->channels); | |
| return pcm_handle; | |
| } | |
| snd_pcm_t *pa_alsa_open_by_device_string( | |
| const char *device, | |
| char **dev, | |
| pa_sample_spec *ss, | |
| pa_channel_map* map, | |
| int mode, | |
| snd_pcm_uframes_t *period_size, | |
| snd_pcm_uframes_t *buffer_size, | |
| snd_pcm_uframes_t tsched_size, | |
| bool *use_mmap, | |
| bool *use_tsched, | |
| pa_sample_format_t **query_supported_formats, | |
| unsigned int **query_supported_rates, | |
| bool require_exact_channel_number) { | |
| int err; | |
| char *d; | |
| snd_pcm_t *pcm_handle; | |
| bool reformat = false; | |
| pa_assert(device); | |
| pa_assert(ss); | |
| pa_assert(map); | |
| d = pa_xstrdup(device); | |
| for (;;) { | |
| pa_log_debug("Trying %s %s SND_PCM_NO_AUTO_FORMAT ...", d, reformat ? "without" : "with"); | |
| if ((err = snd_pcm_open(&pcm_handle, d, mode, | |
| SND_PCM_NONBLOCK| | |
| SND_PCM_NO_AUTO_RESAMPLE| | |
| SND_PCM_NO_AUTO_CHANNELS| | |
| (reformat ? 0 : SND_PCM_NO_AUTO_FORMAT))) < 0) { | |
| pa_log_info("Error opening PCM device %s: %s", d, pa_alsa_strerror(err)); | |
| goto fail; | |
| } | |
| pa_log_debug("Managed to open %s", d); | |
| if (query_supported_formats) | |
| *query_supported_formats = pa_alsa_get_supported_formats(pcm_handle, ss->format); | |
| if (query_supported_rates) | |
| *query_supported_rates = pa_alsa_get_supported_rates(pcm_handle, ss->rate); | |
| if ((err = pa_alsa_set_hw_params( | |
| pcm_handle, | |
| ss, | |
| period_size, | |
| buffer_size, | |
| tsched_size, | |
| use_mmap, | |
| use_tsched, | |
| require_exact_channel_number)) < 0) { | |
| if (!reformat) { | |
| reformat = true; | |
| snd_pcm_close(pcm_handle); | |
| continue; | |
| } | |
| /* Hmm, some hw is very exotic, so we retry with plug, if without it didn't work */ | |
| if (!pa_startswith(d, "plug:") && !pa_startswith(d, "plughw:")) { | |
| char *t; | |
| t = pa_sprintf_malloc("plug:SLAVE='%s'", d); | |
| pa_xfree(d); | |
| d = t; | |
| reformat = false; | |
| snd_pcm_close(pcm_handle); | |
| continue; | |
| } | |
| pa_log_info("Failed to set hardware parameters on %s: %s", d, pa_alsa_strerror(err)); | |
| snd_pcm_close(pcm_handle); | |
| goto fail; | |
| } | |
| if (ss->channels > PA_CHANNELS_MAX) { | |
| pa_log("Device %s has %u channels, but PulseAudio supports only %u channels. Unable to use the device.", | |
| d, ss->channels, PA_CHANNELS_MAX); | |
| snd_pcm_close(pcm_handle); | |
| goto fail; | |
| } | |
| if (dev) | |
| *dev = d; | |
| else | |
| pa_xfree(d); | |
| if (ss->channels != map->channels) | |
| pa_channel_map_init_extend(map, ss->channels, PA_CHANNEL_MAP_ALSA); | |
| return pcm_handle; | |
| } | |
| fail: | |
| pa_xfree(d); | |
| return NULL; | |
| } | |
| snd_pcm_t *pa_alsa_open_by_template( | |
| char **template, | |
| const char *dev_id, | |
| char **dev, | |
| pa_sample_spec *ss, | |
| pa_channel_map* map, | |
| int mode, | |
| snd_pcm_uframes_t *period_size, | |
| snd_pcm_uframes_t *buffer_size, | |
| snd_pcm_uframes_t tsched_size, | |
| bool *use_mmap, | |
| bool *use_tsched, | |
| pa_sample_format_t **query_supported_formats, | |
| unsigned int **query_supported_rates, | |
| bool require_exact_channel_number) { | |
| snd_pcm_t *pcm_handle; | |
| char **i; | |
| for (i = template; *i; i++) { | |
| char *d; | |
| d = pa_replace(*i, "%f", dev_id); | |
| pcm_handle = pa_alsa_open_by_device_string( | |
| d, | |
| dev, | |
| ss, | |
| map, | |
| mode, | |
| period_size, | |
| buffer_size, | |
| tsched_size, | |
| use_mmap, | |
| use_tsched, | |
| query_supported_formats, | |
| query_supported_rates, | |
| require_exact_channel_number); | |
| pa_xfree(d); | |
| if (pcm_handle) | |
| return pcm_handle; | |
| } | |
| return NULL; | |
| } | |
| void pa_alsa_dump(pa_log_level_t level, snd_pcm_t *pcm) { | |
| int err; | |
| snd_output_t *out; | |
| pa_assert(pcm); | |
| pa_assert_se(snd_output_buffer_open(&out) == 0); | |
| if ((err = snd_pcm_dump(pcm, out)) < 0) | |
| pa_logl(level, "snd_pcm_dump(): %s", pa_alsa_strerror(err)); | |
| else { | |
| char *s = NULL; | |
| snd_output_buffer_string(out, &s); | |
| pa_logl(level, "snd_pcm_dump():\n%s", pa_strnull(s)); | |
| } | |
| pa_assert_se(snd_output_close(out) == 0); | |
| } | |
| void pa_alsa_dump_status(snd_pcm_t *pcm) { | |
| int err; | |
| snd_output_t *out; | |
| snd_pcm_status_t *status; | |
| char *s = NULL; | |
| pa_assert(pcm); | |
| snd_pcm_status_alloca(&status); | |
| if ((err = snd_output_buffer_open(&out)) < 0) { | |
| pa_log_debug("snd_output_buffer_open() failed: %s", pa_cstrerror(err)); | |
| return; | |
| } | |
| if ((err = snd_pcm_status(pcm, status)) < 0) { | |
| pa_log_debug("snd_pcm_status() failed: %s", pa_cstrerror(err)); | |
| goto finish; | |
| } | |
| if ((err = snd_pcm_status_dump(status, out)) < 0) { | |
| pa_log_debug("snd_pcm_status_dump(): %s", pa_alsa_strerror(err)); | |
| goto finish; | |
| } | |
| snd_output_buffer_string(out, &s); | |
| pa_log_debug("snd_pcm_status_dump():\n%s", pa_strnull(s)); | |
| finish: | |
| snd_output_close(out); | |
| } | |
| static void alsa_error_handler(const char *file, int line, const char *function, int err, const char *fmt,...) { | |
| va_list ap; | |
| char *alsa_file; | |
| alsa_file = pa_sprintf_malloc("(alsa-lib)%s", file); | |
| va_start(ap, fmt); | |
| pa_log_levelv_meta(PA_LOG_INFO, alsa_file, line, function, fmt, ap); | |
| va_end(ap); | |
| pa_xfree(alsa_file); | |
| } | |
| static pa_atomic_t n_error_handler_installed = PA_ATOMIC_INIT(0); | |
| void pa_alsa_refcnt_inc(void) { | |
| /* This is not really thread safe, but we do our best */ | |
| if (pa_atomic_inc(&n_error_handler_installed) == 0) | |
| snd_lib_error_set_handler(alsa_error_handler); | |
| } | |
| void pa_alsa_refcnt_dec(void) { | |
| int r; | |
| pa_assert_se((r = pa_atomic_dec(&n_error_handler_installed)) >= 1); | |
| if (r == 1) { | |
| snd_lib_error_set_handler(NULL); | |
| snd_config_update_free_global(); | |
| } | |
| } | |
| bool pa_alsa_init_description(pa_proplist *p, pa_card *card) { | |
| const char *d, *k; | |
| pa_assert(p); | |
| if (pa_device_init_description(p, card)) | |
| return true; | |
| if (!(d = pa_proplist_gets(p, "alsa.card_name"))) | |
| d = pa_proplist_gets(p, "alsa.name"); | |
| if (!d) | |
| return false; | |
| k = pa_proplist_gets(p, PA_PROP_DEVICE_PROFILE_DESCRIPTION); | |
| if (d && k) | |
| pa_proplist_setf(p, PA_PROP_DEVICE_DESCRIPTION, "%s %s", d, k); | |
| else if (d) | |
| pa_proplist_sets(p, PA_PROP_DEVICE_DESCRIPTION, d); | |
| return false; | |
| } | |
| void pa_alsa_init_proplist_card(pa_core *c, pa_proplist *p, int card) { | |
| char *cn, *lcn, *dn; | |
| pa_assert(p); | |
| pa_assert(card >= 0); | |
| pa_proplist_setf(p, "alsa.card", "%i", card); | |
| if (snd_card_get_name(card, &cn) >= 0) { | |
| pa_proplist_sets(p, "alsa.card_name", pa_strip(cn)); | |
| free(cn); | |
| } | |
| if (snd_card_get_longname(card, &lcn) >= 0) { | |
| pa_proplist_sets(p, "alsa.long_card_name", pa_strip(lcn)); | |
| free(lcn); | |
| } | |
| if ((dn = pa_alsa_get_driver_name(card))) { | |
| pa_proplist_sets(p, "alsa.driver_name", dn); | |
| pa_xfree(dn); | |
| } | |
| #ifdef HAVE_UDEV | |
| pa_udev_get_info(card, p); | |
| #endif | |
| } | |
| void pa_alsa_init_proplist_pcm_info(pa_core *c, pa_proplist *p, snd_pcm_info_t *pcm_info) { | |
| static const char * const alsa_class_table[SND_PCM_CLASS_LAST+1] = { | |
| [SND_PCM_CLASS_GENERIC] = "generic", | |
| [SND_PCM_CLASS_MULTI] = "multi", | |
| [SND_PCM_CLASS_MODEM] = "modem", | |
| [SND_PCM_CLASS_DIGITIZER] = "digitizer" | |
| }; | |
| static const char * const class_table[SND_PCM_CLASS_LAST+1] = { | |
| [SND_PCM_CLASS_GENERIC] = "sound", | |
| [SND_PCM_CLASS_MULTI] = NULL, | |
| [SND_PCM_CLASS_MODEM] = "modem", | |
| [SND_PCM_CLASS_DIGITIZER] = NULL | |
| }; | |
| static const char * const alsa_subclass_table[SND_PCM_SUBCLASS_LAST+1] = { | |
| [SND_PCM_SUBCLASS_GENERIC_MIX] = "generic-mix", | |
| [SND_PCM_SUBCLASS_MULTI_MIX] = "multi-mix" | |
| }; | |
| snd_pcm_class_t class; | |
| snd_pcm_subclass_t subclass; | |
| const char *n, *id, *sdn; | |
| int card; | |
| pa_assert(p); | |
| pa_assert(pcm_info); | |
| pa_proplist_sets(p, PA_PROP_DEVICE_API, "alsa"); | |
| if ((class = snd_pcm_info_get_class(pcm_info)) <= SND_PCM_CLASS_LAST) { | |
| if (class_table[class]) | |
| pa_proplist_sets(p, PA_PROP_DEVICE_CLASS, class_table[class]); | |
| if (alsa_class_table[class]) | |
| pa_proplist_sets(p, "alsa.class", alsa_class_table[class]); | |
| } | |
| if ((subclass = snd_pcm_info_get_subclass(pcm_info)) <= SND_PCM_SUBCLASS_LAST) | |
| if (alsa_subclass_table[subclass]) | |
| pa_proplist_sets(p, "alsa.subclass", alsa_subclass_table[subclass]); | |
| if ((n = snd_pcm_info_get_name(pcm_info))) { | |
| char *t = pa_xstrdup(n); | |
| pa_proplist_sets(p, "alsa.name", pa_strip(t)); | |
| pa_xfree(t); | |
| } | |
| if ((id = snd_pcm_info_get_id(pcm_info))) | |
| pa_proplist_sets(p, "alsa.id", id); | |
| pa_proplist_setf(p, "alsa.subdevice", "%u", snd_pcm_info_get_subdevice(pcm_info)); | |
| if ((sdn = snd_pcm_info_get_subdevice_name(pcm_info))) | |
| pa_proplist_sets(p, "alsa.subdevice_name", sdn); | |
| pa_proplist_setf(p, "alsa.device", "%u", snd_pcm_info_get_device(pcm_info)); | |
| if ((card = snd_pcm_info_get_card(pcm_info)) >= 0) | |
| pa_alsa_init_proplist_card(c, p, card); | |
| } | |
| void pa_alsa_init_proplist_pcm(pa_core *c, pa_proplist *p, snd_pcm_t *pcm) { | |
| snd_pcm_hw_params_t *hwparams; | |
| snd_pcm_info_t *info; | |
| int bits, err; | |
| snd_pcm_hw_params_alloca(&hwparams); | |
| snd_pcm_info_alloca(&info); | |
| if ((err = snd_pcm_hw_params_current(pcm, hwparams)) < 0) | |
| pa_log_warn("Error fetching hardware parameter info: %s", pa_alsa_strerror(err)); | |
| else { | |
| if ((bits = snd_pcm_hw_params_get_sbits(hwparams)) >= 0) | |
| pa_proplist_setf(p, "alsa.resolution_bits", "%i", bits); | |
| } | |
| if ((err = snd_pcm_info(pcm, info)) < 0) | |
| pa_log_warn("Error fetching PCM info: %s", pa_alsa_strerror(err)); | |
| else | |
| pa_alsa_init_proplist_pcm_info(c, p, info); | |
| } | |
| void pa_alsa_init_proplist_ctl(pa_proplist *p, const char *name) { | |
| int err; | |
| snd_ctl_t *ctl; | |
| snd_ctl_card_info_t *info; | |
| const char *t; | |
| pa_assert(p); | |
| snd_ctl_card_info_alloca(&info); | |
| if ((err = snd_ctl_open(&ctl, name, 0)) < 0) { | |
| pa_log_warn("Error opening low-level control device '%s': %s", name, snd_strerror(err)); | |
| return; | |
| } | |
| if ((err = snd_ctl_card_info(ctl, info)) < 0) { | |
| pa_log_warn("Control device %s card info: %s", name, snd_strerror(err)); | |
| snd_ctl_close(ctl); | |
| return; | |
| } | |
| if ((t = snd_ctl_card_info_get_mixername(info)) && *t) | |
| pa_proplist_sets(p, "alsa.mixer_name", t); | |
| if ((t = snd_ctl_card_info_get_components(info)) && *t) | |
| pa_proplist_sets(p, "alsa.components", t); | |
| snd_ctl_close(ctl); | |
| } | |
| int pa_alsa_recover_from_poll(snd_pcm_t *pcm, int revents) { | |
| snd_pcm_state_t state; | |
| snd_pcm_hw_params_t *hwparams; | |
| int err; | |
| pa_assert(pcm); | |
| if (revents & POLLERR) | |
| pa_log_debug("Got POLLERR from ALSA"); | |
| if (revents & POLLNVAL) | |
| pa_log_warn("Got POLLNVAL from ALSA"); | |
| if (revents & POLLHUP) | |
| pa_log_warn("Got POLLHUP from ALSA"); | |
| if (revents & POLLPRI) | |
| pa_log_warn("Got POLLPRI from ALSA"); | |
| if (revents & POLLIN) | |
| pa_log_debug("Got POLLIN from ALSA"); | |
| if (revents & POLLOUT) | |
| pa_log_debug("Got POLLOUT from ALSA"); | |
| state = snd_pcm_state(pcm); | |
| pa_log_debug("PCM state is %s", snd_pcm_state_name(state)); | |
| /* Try to recover from this error */ | |
| switch (state) { | |
| case SND_PCM_STATE_DISCONNECTED: | |
| /* Do not try to recover */ | |
| pa_log_info("Device disconnected."); | |
| return -1; | |
| case SND_PCM_STATE_XRUN: | |
| if ((err = snd_pcm_recover(pcm, -EPIPE, 1)) != 0) { | |
| pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN: %s", pa_alsa_strerror(err)); | |
| return -1; | |
| } | |
| break; | |
| case SND_PCM_STATE_SUSPENDED: | |
| snd_pcm_hw_params_alloca(&hwparams); | |
| if ((err = snd_pcm_hw_params_any(pcm, hwparams)) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(err)); | |
| return -1; | |
| } | |
| if (snd_pcm_hw_params_can_resume(hwparams)) { | |
| /* Retry resume 3 times before giving up, then fallback to restarting the stream. */ | |
| for (int i = 0; i < 3; i++) { | |
| if ((err = snd_pcm_resume(pcm)) == 0) | |
| return 0; | |
| if (err != -EAGAIN) | |
| break; | |
| pa_msleep(25); | |
| } | |
| pa_log_warn("Could not recover alsa device from SUSPENDED state, trying to restart PCM"); | |
| } | |
| /* Fall through */ | |
| default: | |
| snd_pcm_drop(pcm); | |
| return 1; | |
| } | |
| return 0; | |
| } | |
| pa_rtpoll_item* pa_alsa_build_pollfd(snd_pcm_t *pcm, pa_rtpoll *rtpoll) { | |
| int n, err; | |
| struct pollfd *pollfd; | |
| pa_rtpoll_item *item; | |
| pa_assert(pcm); | |
| if ((n = snd_pcm_poll_descriptors_count(pcm)) < 0) { | |
| pa_log("snd_pcm_poll_descriptors_count() failed: %s", pa_alsa_strerror(n)); | |
| return NULL; | |
| } | |
| item = pa_rtpoll_item_new(rtpoll, PA_RTPOLL_NEVER, (unsigned) n); | |
| pollfd = pa_rtpoll_item_get_pollfd(item, NULL); | |
| if ((err = snd_pcm_poll_descriptors(pcm, pollfd, (unsigned) n)) < 0) { | |
| pa_log("snd_pcm_poll_descriptors() failed: %s", pa_alsa_strerror(err)); | |
| pa_rtpoll_item_free(item); | |
| return NULL; | |
| } | |
| return item; | |
| } | |
| snd_pcm_sframes_t pa_alsa_safe_avail(snd_pcm_t *pcm, size_t hwbuf_size, const pa_sample_spec *ss) { | |
| snd_pcm_sframes_t n; | |
| size_t k; | |
| pa_assert(pcm); | |
| pa_assert(hwbuf_size > 0); | |
| pa_assert(ss); | |
| /* Some ALSA driver expose weird bugs, let's inform the user about | |
| * what is going on */ | |
| n = snd_pcm_avail(pcm); | |
| if (n <= 0) | |
| return n; | |
| k = (size_t) n * pa_frame_size(ss); | |
| if (PA_UNLIKELY(k >= hwbuf_size * 5 || | |
| k >= pa_bytes_per_second(ss)*10)) { | |
| PA_ONCE_BEGIN { | |
| char *dn = pa_alsa_get_driver_name_by_pcm(pcm); | |
| pa_log_debug(ngettext("snd_pcm_avail() returned a value that is exceptionally large: %lu byte (%lu ms).\n" | |
| "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.", | |
| "snd_pcm_avail() returned a value that is exceptionally large: %lu bytes (%lu ms).\n" | |
| "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.", | |
| (unsigned long) k), | |
| (unsigned long) k, | |
| (unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC), | |
| pa_strnull(dn)); | |
| pa_xfree(dn); | |
| pa_alsa_dump(PA_LOG_DEBUG, pcm); | |
| } PA_ONCE_END; | |
| /* Mhmm, let's try not to fail completely */ | |
| n = (snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss)); | |
| } | |
| return n; | |
| } | |
| int pa_alsa_safe_delay(snd_pcm_t *pcm, snd_pcm_status_t *status, snd_pcm_sframes_t *delay, size_t hwbuf_size, const pa_sample_spec *ss, | |
| bool capture) { | |
| ssize_t k; | |
| size_t abs_k; | |
| int err; | |
| snd_pcm_sframes_t avail = 0; | |
| #if (SND_LIB_VERSION >= ((1<<16)|(1<<8)|0)) /* API additions in 1.1.0 */ | |
| snd_pcm_audio_tstamp_config_t tstamp_config; | |
| #endif | |
| pa_assert(pcm); | |
| pa_assert(delay); | |
| pa_assert(hwbuf_size > 0); | |
| pa_assert(ss); | |
| /* Some ALSA driver expose weird bugs, let's inform the user about | |
| * what is going on. We're going to get both the avail and delay values so | |
| * that we can compare and check them for capture. | |
| * This is done with snd_pcm_status() which provides | |
| * avail, delay and timestamp values in a single kernel call to improve | |
| * timer-based scheduling */ | |
| #if (SND_LIB_VERSION >= ((1<<16)|(1<<8)|0)) /* API additions in 1.1.0 */ | |
| /* The time stamp configuration needs to be set so that the | |
| * ALSA code will use the internal delay reported by the driver. | |
| * The time stamp configuration was introduced in alsa version 1.1.0. */ | |
| tstamp_config.type_requested = 1; /* ALSA default time stamp type */ | |
| tstamp_config.report_delay = 1; | |
| snd_pcm_status_set_audio_htstamp_config(status, &tstamp_config); | |
| #endif | |
| if ((err = snd_pcm_status(pcm, status)) < 0) | |
| return err; | |
| avail = snd_pcm_status_get_avail(status); | |
| *delay = snd_pcm_status_get_delay(status); | |
| k = (ssize_t) *delay * (ssize_t) pa_frame_size(ss); | |
| abs_k = k >= 0 ? (size_t) k : (size_t) -k; | |
| if (PA_UNLIKELY(abs_k >= hwbuf_size * 5 || | |
| abs_k >= pa_bytes_per_second(ss)*10)) { | |
| PA_ONCE_BEGIN { | |
| char *dn = pa_alsa_get_driver_name_by_pcm(pcm); | |
| pa_log_debug(ngettext("snd_pcm_delay() returned a value that is exceptionally large: %li byte (%s%lu ms).\n" | |
| "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.", | |
| "snd_pcm_delay() returned a value that is exceptionally large: %li bytes (%s%lu ms).\n" | |
| "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.", | |
| (signed long) k), | |
| (signed long) k, | |
| k < 0 ? "-" : "", | |
| (unsigned long) (pa_bytes_to_usec(abs_k, ss) / PA_USEC_PER_MSEC), | |
| pa_strnull(dn)); | |
| pa_xfree(dn); | |
| pa_alsa_dump(PA_LOG_DEBUG, pcm); | |
| } PA_ONCE_END; | |
| /* Mhmm, let's try not to fail completely */ | |
| if (k < 0) | |
| *delay = -(snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss)); | |
| else | |
| *delay = (snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss)); | |
| } | |
| if (capture) { | |
| abs_k = (size_t) avail * pa_frame_size(ss); | |
| if (PA_UNLIKELY(abs_k >= hwbuf_size * 5 || | |
| abs_k >= pa_bytes_per_second(ss)*10)) { | |
| PA_ONCE_BEGIN { | |
| char *dn = pa_alsa_get_driver_name_by_pcm(pcm); | |
| pa_log_debug(ngettext("snd_pcm_avail() returned a value that is exceptionally large: %lu byte (%lu ms).\n" | |
| "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.", | |
| "snd_pcm_avail() returned a value that is exceptionally large: %lu bytes (%lu ms).\n" | |
| "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.", | |
| (unsigned long) k), | |
| (unsigned long) k, | |
| (unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC), | |
| pa_strnull(dn)); | |
| pa_xfree(dn); | |
| pa_alsa_dump(PA_LOG_DEBUG, pcm); | |
| } PA_ONCE_END; | |
| /* Mhmm, let's try not to fail completely */ | |
| avail = (snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss)); | |
| } | |
| if (PA_UNLIKELY(*delay < avail)) { | |
| PA_ONCE_BEGIN { | |
| char *dn = pa_alsa_get_driver_name_by_pcm(pcm); | |
| pa_log(_("snd_pcm_avail_delay() returned strange values: delay %lu is less than avail %lu.\n" | |
| "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers."), | |
| (unsigned long) *delay, | |
| (unsigned long) avail, | |
| pa_strnull(dn)); | |
| pa_xfree(dn); | |
| pa_alsa_dump(PA_LOG_ERROR, pcm); | |
| } PA_ONCE_END; | |
| /* try to fixup */ | |
| *delay = avail; | |
| } | |
| } | |
| return 0; | |
| } | |
| int pa_alsa_safe_mmap_begin(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas, snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames, size_t hwbuf_size, const pa_sample_spec *ss) { | |
| int r; | |
| snd_pcm_uframes_t before; | |
| size_t k; | |
| pa_assert(pcm); | |
| pa_assert(areas); | |
| pa_assert(offset); | |
| pa_assert(frames); | |
| pa_assert(hwbuf_size > 0); | |
| pa_assert(ss); | |
| before = *frames; | |
| r = snd_pcm_mmap_begin(pcm, areas, offset, frames); | |
| if (r < 0) | |
| return r; | |
| k = (size_t) *frames * pa_frame_size(ss); | |
| if (PA_UNLIKELY(*frames > before || | |
| k >= hwbuf_size * 3 || | |
| k >= pa_bytes_per_second(ss)*10)) | |
| PA_ONCE_BEGIN { | |
| char *dn = pa_alsa_get_driver_name_by_pcm(pcm); | |
| pa_log_debug(ngettext("snd_pcm_mmap_begin() returned a value that is exceptionally large: %lu byte (%lu ms).\n" | |
| "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.", | |
| "snd_pcm_mmap_begin() returned a value that is exceptionally large: %lu bytes (%lu ms).\n" | |
| "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.", | |
| (unsigned long) k), | |
| (unsigned long) k, | |
| (unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC), | |
| pa_strnull(dn)); | |
| pa_xfree(dn); | |
| pa_alsa_dump(PA_LOG_DEBUG, pcm); | |
| } PA_ONCE_END; | |
| return r; | |
| } | |
| char *pa_alsa_get_driver_name(int card) { | |
| char *t, *m, *n; | |
| pa_assert(card >= 0); | |
| t = pa_sprintf_malloc("/sys/class/sound/card%i/device/driver/module", card); | |
| m = pa_readlink(t); | |
| pa_xfree(t); | |
| if (!m) | |
| return NULL; | |
| n = pa_xstrdup(pa_path_get_filename(m)); | |
| pa_xfree(m); | |
| return n; | |
| } | |
| char *pa_alsa_get_driver_name_by_pcm(snd_pcm_t *pcm) { | |
| int card; | |
| snd_pcm_info_t* info; | |
| snd_pcm_info_alloca(&info); | |
| pa_assert(pcm); | |
| if (snd_pcm_info(pcm, info) < 0) | |
| return NULL; | |
| if ((card = snd_pcm_info_get_card(info)) < 0) | |
| return NULL; | |
| return pa_alsa_get_driver_name(card); | |
| } | |
| char *pa_alsa_get_reserve_name(const char *device) { | |
| const char *t; | |
| int i; | |
| pa_assert(device); | |
| if ((t = strchr(device, ':'))) | |
| device = t+1; | |
| if ((i = snd_card_get_index(device)) < 0) { | |
| int32_t k; | |
| if (pa_atoi(device, &k) < 0) | |
| return NULL; | |
| i = (int) k; | |
| } | |
| return pa_sprintf_malloc("Audio%i", i); | |
| } | |
| static void dump_supported_rates(unsigned int* values) | |
| { | |
| pa_strbuf *buf; | |
| char *str; | |
| int i; | |
| buf = pa_strbuf_new(); | |
| for (i = 0; values[i]; i++) { | |
| pa_strbuf_printf(buf, " %u", values[i]); | |
| } | |
| str = pa_strbuf_to_string_free(buf); | |
| pa_log_debug("Supported rates:%s", str); | |
| pa_xfree(str); | |
| } | |
| unsigned int *pa_alsa_get_supported_rates(snd_pcm_t *pcm, unsigned int fallback_rate) { | |
| static unsigned int all_rates[] = { 8000, 11025, 12000, | |
| 16000, 22050, 24000, | |
| 32000, 44100, 48000, | |
| 64000, 88200, 96000, | |
| 128000, 176400, 192000, | |
| 352800, 384000, | |
| 705600, 768000 }; | |
| bool supported[PA_ELEMENTSOF(all_rates)] = { false, }; | |
| snd_pcm_hw_params_t *hwparams; | |
| unsigned int i, j, n, *rates = NULL; | |
| int ret; | |
| snd_pcm_hw_params_alloca(&hwparams); | |
| if ((ret = snd_pcm_hw_params_any(pcm, hwparams)) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(ret)); | |
| return NULL; | |
| } | |
| for (i = 0, n = 0; i < PA_ELEMENTSOF(all_rates); i++) { | |
| if (snd_pcm_hw_params_test_rate(pcm, hwparams, all_rates[i], 0) == 0) { | |
| supported[i] = true; | |
| n++; | |
| } | |
| } | |
| if (n > 0) { | |
| rates = pa_xnew(unsigned int, n + 1); | |
| for (i = 0, j = 0; i < PA_ELEMENTSOF(all_rates); i++) { | |
| if (supported[i]) | |
| rates[j++] = all_rates[i]; | |
| } | |
| rates[j] = 0; | |
| } else { | |
| rates = pa_xnew(unsigned int, 2); | |
| rates[0] = fallback_rate; | |
| if ((ret = snd_pcm_hw_params_set_rate_near(pcm, hwparams, &rates[0], NULL)) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_set_rate_near() failed: %s", pa_alsa_strerror(ret)); | |
| pa_xfree(rates); | |
| return NULL; | |
| } | |
| rates[1] = 0; | |
| } | |
| dump_supported_rates(rates); | |
| return rates; | |
| } | |
| pa_sample_format_t *pa_alsa_get_supported_formats(snd_pcm_t *pcm, pa_sample_format_t fallback_format) { | |
| static const snd_pcm_format_t format_trans_to_pcm[] = { | |
| [PA_SAMPLE_U8] = SND_PCM_FORMAT_U8, | |
| [PA_SAMPLE_ALAW] = SND_PCM_FORMAT_A_LAW, | |
| [PA_SAMPLE_ULAW] = SND_PCM_FORMAT_MU_LAW, | |
| [PA_SAMPLE_S16LE] = SND_PCM_FORMAT_S16_LE, | |
| [PA_SAMPLE_S16BE] = SND_PCM_FORMAT_S16_BE, | |
| [PA_SAMPLE_FLOAT32LE] = SND_PCM_FORMAT_FLOAT_LE, | |
| [PA_SAMPLE_FLOAT32BE] = SND_PCM_FORMAT_FLOAT_BE, | |
| [PA_SAMPLE_S32LE] = SND_PCM_FORMAT_S32_LE, | |
| [PA_SAMPLE_S32BE] = SND_PCM_FORMAT_S32_BE, | |
| [PA_SAMPLE_S24LE] = SND_PCM_FORMAT_S24_3LE, | |
| [PA_SAMPLE_S24BE] = SND_PCM_FORMAT_S24_3BE, | |
| [PA_SAMPLE_S24_32LE] = SND_PCM_FORMAT_S24_LE, | |
| [PA_SAMPLE_S24_32BE] = SND_PCM_FORMAT_S24_BE, | |
| }; | |
| static const pa_sample_format_t all_formats[] = { | |
| PA_SAMPLE_U8, | |
| PA_SAMPLE_ALAW, | |
| PA_SAMPLE_ULAW, | |
| PA_SAMPLE_S16LE, | |
| PA_SAMPLE_S16BE, | |
| PA_SAMPLE_FLOAT32LE, | |
| PA_SAMPLE_FLOAT32BE, | |
| PA_SAMPLE_S32LE, | |
| PA_SAMPLE_S32BE, | |
| PA_SAMPLE_S24LE, | |
| PA_SAMPLE_S24BE, | |
| PA_SAMPLE_S24_32LE, | |
| PA_SAMPLE_S24_32BE, | |
| }; | |
| bool supported[PA_ELEMENTSOF(all_formats)] = { | |
| false, | |
| }; | |
| snd_pcm_hw_params_t *hwparams; | |
| unsigned int i, j, n; | |
| pa_sample_format_t *formats = NULL; | |
| int ret; | |
| snd_pcm_hw_params_alloca(&hwparams); | |
| if ((ret = snd_pcm_hw_params_any(pcm, hwparams)) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(ret)); | |
| return NULL; | |
| } | |
| for (i = 0, n = 0; i < PA_ELEMENTSOF(all_formats); i++) { | |
| if (snd_pcm_hw_params_test_format(pcm, hwparams, format_trans_to_pcm[all_formats[i]]) == 0) { | |
| supported[i] = true; | |
| n++; | |
| } | |
| } | |
| if (n > 0) { | |
| formats = pa_xnew(pa_sample_format_t, n + 1); | |
| for (i = 0, j = 0; i < PA_ELEMENTSOF(all_formats); i++) { | |
| if (supported[i]) | |
| formats[j++] = all_formats[i]; | |
| } | |
| formats[j] = PA_SAMPLE_MAX; | |
| } else { | |
| formats = pa_xnew(pa_sample_format_t, 2); | |
| formats[0] = fallback_format; | |
| if ((ret = snd_pcm_hw_params_set_format(pcm, hwparams, format_trans_to_pcm[formats[0]])) < 0) { | |
| pa_log_debug("snd_pcm_hw_params_set_format() failed: %s", pa_alsa_strerror(ret)); | |
| pa_xfree(formats); | |
| return NULL; | |
| } | |
| formats[1] = PA_SAMPLE_MAX; | |
| } | |
| return formats; | |
| } | |
| bool pa_alsa_pcm_is_hw(snd_pcm_t *pcm) { | |
| snd_pcm_info_t* info; | |
| snd_pcm_info_alloca(&info); | |
| pa_assert(pcm); | |
| if (snd_pcm_info(pcm, info) < 0) | |
| return false; | |
| return snd_pcm_info_get_card(info) >= 0; | |
| } | |
| bool pa_alsa_pcm_is_modem(snd_pcm_t *pcm) { | |
| snd_pcm_info_t* info; | |
| snd_pcm_info_alloca(&info); | |
| pa_assert(pcm); | |
| if (snd_pcm_info(pcm, info) < 0) | |
| return false; | |
| return snd_pcm_info_get_class(info) == SND_PCM_CLASS_MODEM; | |
| } | |
| PA_STATIC_TLS_DECLARE(cstrerror, pa_xfree); | |
| const char* pa_alsa_strerror(int errnum) { | |
| const char *original = NULL; | |
| char *translated, *t; | |
| char errbuf[128]; | |
| if ((t = PA_STATIC_TLS_GET(cstrerror))) | |
| pa_xfree(t); | |
| original = snd_strerror(errnum); | |
| if (!original) { | |
| pa_snprintf(errbuf, sizeof(errbuf), "Unknown error %i", errnum); | |
| original = errbuf; | |
| } | |
| if (!(translated = pa_locale_to_utf8(original))) { | |
| pa_log_warn("Unable to convert error string to locale, filtering."); | |
| translated = pa_utf8_filter(original); | |
| } | |
| PA_STATIC_TLS_SET(cstrerror, translated); | |
| return translated; | |
| } | |
| bool pa_alsa_may_tsched(bool want) { | |
| if (!want) | |
| return false; | |
| if (!pa_rtclock_hrtimer()) { | |
| /* We cannot depend on being woken up in time when the timers | |
| are inaccurate, so let's fallback to classic IO based playback | |
| then. */ | |
| pa_log_notice("Disabling timer-based scheduling because high-resolution timers are not available from the kernel."); | |
| return false; } | |
| if (pa_running_in_vm()) { | |
| /* We cannot depend on being woken up when we ask for in a VM, | |
| * so let's fallback to classic IO based playback then. */ | |
| pa_log_notice("Disabling timer-based scheduling because running inside a VM."); | |
| return false; | |
| } | |
| return true; | |
| } | |
| #define SND_MIXER_ELEM_PULSEAUDIO (SND_MIXER_ELEM_LAST + 10) | |
| static snd_mixer_elem_t *pa_alsa_mixer_find(snd_mixer_t *mixer, | |
| snd_ctl_elem_iface_t iface, | |
| const char *name, | |
| unsigned int index, | |
| unsigned int device, | |
| unsigned int subdevice) { | |
| snd_mixer_elem_t *elem; | |
| for (elem = snd_mixer_first_elem(mixer); elem; elem = snd_mixer_elem_next(elem)) { | |
| snd_hctl_elem_t **_helem, *helem; | |
| if (snd_mixer_elem_get_type(elem) != SND_MIXER_ELEM_PULSEAUDIO) | |
| continue; | |
| _helem = snd_mixer_elem_get_private(elem); | |
| helem = *_helem; | |
| if (snd_hctl_elem_get_interface(helem) != iface) | |
| continue; | |
| if (!pa_streq(snd_hctl_elem_get_name(helem), name)) | |
| continue; | |
| if (snd_hctl_elem_get_index(helem) != index) | |
| continue; | |
| if (snd_hctl_elem_get_device(helem) != device) | |
| continue; | |
| if (snd_hctl_elem_get_subdevice(helem) != subdevice) | |
| continue; | |
| return elem; | |
| } | |
| return NULL; | |
| } | |
| snd_mixer_elem_t *pa_alsa_mixer_find_card(snd_mixer_t *mixer, struct pa_alsa_mixer_id *alsa_id, unsigned int device) { | |
| return pa_alsa_mixer_find(mixer, SND_CTL_ELEM_IFACE_CARD, alsa_id->name, alsa_id->index, device, 0); | |
| } | |
| snd_mixer_elem_t *pa_alsa_mixer_find_pcm(snd_mixer_t *mixer, const char *name, unsigned int device) { | |
| return pa_alsa_mixer_find(mixer, SND_CTL_ELEM_IFACE_PCM, name, 0, device, 0); | |
| } | |
| static int mixer_class_compare(const snd_mixer_elem_t *c1, const snd_mixer_elem_t *c2) | |
| { | |
| /* Dummy compare function */ | |
| return c1 == c2 ? 0 : (c1 > c2 ? 1 : -1); | |
| } | |
| static void mixer_melem_free(snd_mixer_elem_t *elem) | |
| { | |
| snd_hctl_elem_t **_helem; | |
| _helem = snd_mixer_elem_get_private(elem); | |
| pa_xfree(_helem); | |
| } | |
| static int mixer_class_event(snd_mixer_class_t *class, unsigned int mask, | |
| snd_hctl_elem_t *helem, snd_mixer_elem_t *melem) | |
| { | |
| int err; | |
| const char *name = snd_hctl_elem_get_name(helem); | |
| snd_hctl_elem_t **_helem; | |
| /* NOTE: The remove event is defined as '~0U`. */ | |
| if (mask == SND_CTL_EVENT_MASK_REMOVE) { | |
| /* NOTE: Unless we remove the pointer to melem from the linked-list at | |
| * private_data of helem, an assertion will be hit in alsa-lib since | |
| * the list is not empty. */ | |
| _helem = snd_mixer_elem_get_private(melem); | |
| *_helem = NULL; | |
| snd_mixer_elem_detach(melem, helem); | |
| } else if (mask & SND_CTL_EVENT_MASK_ADD) { | |
| snd_ctl_elem_iface_t iface = snd_hctl_elem_get_interface(helem); | |
| if (iface == SND_CTL_ELEM_IFACE_CARD || iface == SND_CTL_ELEM_IFACE_PCM) { | |
| snd_mixer_t *mixer = snd_mixer_class_get_mixer(class); | |
| snd_ctl_elem_iface_t iface = snd_hctl_elem_get_interface(helem); | |
| const char *name = snd_hctl_elem_get_name(helem); | |
| const int index = snd_hctl_elem_get_index(helem); | |
| const int device = snd_hctl_elem_get_device(helem); | |
| const int subdevice = snd_hctl_elem_get_subdevice(helem); | |
| snd_mixer_elem_t *new_melem; | |
| bool found = true; | |
| new_melem = pa_alsa_mixer_find(mixer, iface, name, index, device, subdevice); | |
| if (!new_melem) { | |
| _helem = pa_xmalloc(sizeof(snd_hctl_elem_t *)); | |
| *_helem = helem; | |
| /* Put the hctl pointer as our private data - it will be useful for callbacks */ | |
| if ((err = snd_mixer_elem_new(&new_melem, SND_MIXER_ELEM_PULSEAUDIO, 0, _helem, mixer_melem_free)) < 0) { | |
| pa_log_warn("snd_mixer_elem_new failed: %s", pa_alsa_strerror(err)); | |
| return 0; | |
| } | |
| found = false; | |
| } else { | |
| _helem = snd_mixer_elem_get_private(new_melem); | |
| if (_helem) { | |
| char *s1, *s2; | |
| snd_ctl_elem_id_t *id1, *id2; | |
| snd_ctl_elem_id_alloca(&id1); | |
| snd_ctl_elem_id_alloca(&id2); | |
| snd_hctl_elem_get_id(helem, id1); | |
| snd_hctl_elem_get_id(*_helem, id2); | |
| s1 = snd_ctl_ascii_elem_id_get(id1); | |
| s2 = snd_ctl_ascii_elem_id_get(id2); | |
| pa_log_warn("mixer_class_event - duplicate mixer controls: %s | %s", s1, s2); | |
| free(s2); | |
| free(s1); | |
| return 0; | |
| } | |
| *_helem = helem; | |
| } | |
| if ((err = snd_mixer_elem_attach(new_melem, helem)) < 0) { | |
| pa_log_warn("snd_mixer_elem_attach failed: %s", pa_alsa_strerror(err)); | |
| snd_mixer_elem_free(melem); | |
| return 0; | |
| } | |
| if (!found) { | |
| if ((err = snd_mixer_elem_add(new_melem, class)) < 0) { | |
| pa_log_warn("snd_mixer_elem_add failed: %s", pa_alsa_strerror(err)); | |
| return 0; | |
| } | |
| } | |
| } | |
| } | |
| else if (mask & SND_CTL_EVENT_MASK_VALUE) { | |
| snd_mixer_elem_value(melem); /* Calls the element callback */ | |
| return 0; | |
| } | |
| else | |
| pa_log_info("Got an unknown mixer class event for %s: mask 0x%x", name, mask); | |
| return 0; | |
| } | |
| static int prepare_mixer(snd_mixer_t *mixer, const char *dev, snd_hctl_t *hctl) { | |
| int err; | |
| snd_mixer_class_t *class; | |
| pa_assert(mixer); | |
| pa_assert(dev); | |
| if ((err = snd_mixer_attach_hctl(mixer, hctl)) < 0) { | |
| pa_log_info("Unable to attach to mixer %s: %s", dev, pa_alsa_strerror(err)); | |
| return -1; | |
| } | |
| if (snd_mixer_class_malloc(&class)) { | |
| pa_log_info("Failed to allocate mixer class for %s", dev); | |
| return -1; | |
| } | |
| snd_mixer_class_set_event(class, mixer_class_event); | |
| snd_mixer_class_set_compare(class, mixer_class_compare); | |
| if ((err = snd_mixer_class_register(class, mixer)) < 0) { | |
| pa_log_info("Unable register mixer class for %s: %s", dev, pa_alsa_strerror(err)); | |
| snd_mixer_class_free(class); | |
| return -1; | |
| } | |
| /* From here on, the mixer class is deallocated by alsa on snd_mixer_close/free. */ | |
| if ((err = snd_mixer_selem_register(mixer, NULL, NULL)) < 0) { | |
| pa_log_warn("Unable to register mixer: %s", pa_alsa_strerror(err)); | |
| return -1; | |
| } | |
| if ((err = snd_mixer_load(mixer)) < 0) { | |
| pa_log_warn("Unable to load mixer: %s", pa_alsa_strerror(err)); | |
| return -1; | |
| } | |
| pa_log_info("Successfully attached to mixer '%s'", dev); | |
| return 0; | |
| } | |
| snd_mixer_t *pa_alsa_open_mixer(pa_hashmap *mixers, int alsa_card_index, bool probe) { | |
| char *md = pa_sprintf_malloc("hw:%i", alsa_card_index); | |
| snd_mixer_t *m = pa_alsa_open_mixer_by_name(mixers, md, probe); | |
| pa_xfree(md); | |
| return m; | |
| } | |
| pa_alsa_mixer *pa_alsa_create_mixer(pa_hashmap *mixers, const char *dev, snd_mixer_t *m, bool probe) { | |
| pa_alsa_mixer *pm; | |
| pm = pa_xnew0(pa_alsa_mixer, 1); | |
| if (pm == NULL) | |
| return NULL; | |
| pm->used_for_probe_only = probe; | |
| pm->mixer_handle = m; | |
| pa_hashmap_put(mixers, pa_xstrdup(dev), pm); | |
| return pm; | |
| } | |
| snd_mixer_t *pa_alsa_open_mixer_by_name(pa_hashmap *mixers, const char *dev, bool probe) { | |
| int err; | |
| snd_mixer_t *m; | |
| snd_hctl_t *hctl; | |
| pa_alsa_mixer *pm; | |
| pa_assert(mixers); | |
| pa_assert(dev); | |
| pm = pa_hashmap_get(mixers, dev); | |
| if (pm) { | |
| if (!probe) | |
| pm->used_for_probe_only = false; | |
| return pm->mixer_handle; | |
| } | |
| if ((err = snd_mixer_open(&m, 0)) < 0) { | |
| pa_log("Error opening mixer: %s", pa_alsa_strerror(err)); | |
| return NULL; | |
| } | |
| err = snd_hctl_open(&hctl, dev, 0); | |
| if (err < 0) { | |
| pa_log("Error opening hctl device: %s", pa_alsa_strerror(err)); | |
| goto __close; | |
| } | |
| if (prepare_mixer(m, dev, hctl) >= 0) { | |
| /* get the ALSA card number (index) and ID (alias) and create two identical mixers */ | |
| char *p, *dev2, *dev_idx, *dev_id; | |
| snd_ctl_card_info_t *info; | |
| snd_ctl_card_info_alloca(&info); | |
| err = snd_ctl_card_info(snd_hctl_ctl(hctl), info); | |
| if (err < 0) | |
| goto __std; | |
| dev2 = pa_xstrdup(dev); | |
| if (dev2 == NULL) | |
| goto __close; | |
| p = strchr(dev2, ':'); | |
| /* sanity check - only hw: devices */ | |
| if (p == NULL || (p - dev2) < 2 || !pa_strneq(p - 2, "hw:", 3)) { | |
| pa_xfree(dev2); | |
| goto __std; | |
| } | |
| *p = '\0'; | |
| dev_idx = pa_sprintf_malloc("%s:%u", dev2, snd_ctl_card_info_get_card(info)); | |
| dev_id = pa_sprintf_malloc("%s:%s", dev2, snd_ctl_card_info_get_id(info)); | |
| pa_log_debug("ALSA alias mixers: %s = %s", dev_idx, dev_id); | |
| if (dev_idx && dev_id && (strcmp(dev, dev_idx) == 0 || strcmp(dev, dev_id) == 0)) { | |
| pm = pa_alsa_create_mixer(mixers, dev_idx, m, probe); | |
| if (pm) { | |
| pa_alsa_mixer *pm2; | |
| pm2 = pa_alsa_create_mixer(mixers, dev_id, m, probe); | |
| if (pm2) { | |
| pm->alias = pm2; | |
| pm2->alias = pm; | |
| } | |
| } | |
| } | |
| pa_xfree(dev_id); | |
| pa_xfree(dev_idx); | |
| pa_xfree(dev2); | |
| __std: | |
| if (pm == NULL) | |
| pm = pa_alsa_create_mixer(mixers, dev, m, probe); | |
| if (pm) | |
| return m; | |
| } | |
| __close: | |
| snd_mixer_close(m); | |
| return NULL; | |
| } | |
| snd_mixer_t *pa_alsa_open_mixer_for_pcm(pa_hashmap *mixers, snd_pcm_t *pcm, bool probe) { | |
| snd_pcm_info_t* info; | |
| snd_pcm_info_alloca(&info); | |
| pa_assert(pcm); | |
| if (snd_pcm_info(pcm, info) >= 0) { | |
| int card_idx; | |
| if ((card_idx = snd_pcm_info_get_card(info)) >= 0) | |
| return pa_alsa_open_mixer(mixers, card_idx, probe); | |
| } | |
| return NULL; | |
| } | |
| void pa_alsa_mixer_set_fdlist(pa_hashmap *mixers, snd_mixer_t *mixer_handle, pa_mainloop_api *ml) | |
| { | |
| pa_alsa_mixer *pm; | |
| void *state; | |
| PA_HASHMAP_FOREACH(pm, mixers, state) | |
| if (pm->mixer_handle == mixer_handle) { | |
| pm->used_for_probe_only = false; | |
| if (!pm->fdl) { | |
| pm->fdl = pa_alsa_fdlist_new(); | |
| if (pm->fdl) | |
| pa_alsa_fdlist_set_handle(pm->fdl, pm->mixer_handle, NULL, ml); | |
| } | |
| } | |
| } | |
| void pa_alsa_mixer_free(pa_alsa_mixer *mixer) | |
| { | |
| if (mixer->fdl) | |
| pa_alsa_fdlist_free(mixer->fdl); | |
| if (mixer->mixer_handle && mixer->alias == NULL) | |
| snd_mixer_close(mixer->mixer_handle); | |
| if (mixer->alias) | |
| mixer->alias->alias = NULL; | |
| pa_xfree(mixer); | |
| } | |
| int pa_alsa_get_hdmi_eld(snd_hctl_elem_t *elem, pa_hdmi_eld *eld) { | |
| /* The ELD format is specific to HDA Intel sound cards and defined in the | |
| HDA specification: http://www.intel.com/content/www/us/en/standards/high-definition-audio-specification.html */ | |
| int err; | |
| snd_ctl_elem_info_t *info; | |
| snd_ctl_elem_value_t *value; | |
| uint8_t *elddata; | |
| unsigned int eldsize, mnl; | |
| unsigned int device; | |
| pa_assert(eld != NULL); | |
| pa_assert(elem != NULL); | |
| /* Does it have any contents? */ | |
| snd_ctl_elem_info_alloca(&info); | |
| snd_ctl_elem_value_alloca(&value); | |
| if ((err = snd_hctl_elem_info(elem, info)) < 0 || | |
| (err = snd_hctl_elem_read(elem, value)) < 0) { | |
| pa_log_warn("Accessing ELD control failed with error %s", snd_strerror(err)); | |
| return -1; | |
| } | |
| device = snd_hctl_elem_get_device(elem); | |
| eldsize = snd_ctl_elem_info_get_count(info); | |
| elddata = (unsigned char *) snd_ctl_elem_value_get_bytes(value); | |
| if (elddata == NULL || eldsize == 0) { | |
| pa_log_debug("ELD info empty (for device=%d)", device); | |
| return -1; | |
| } | |
| if (eldsize < 20 || eldsize > 256) { | |
| pa_log_debug("ELD info has wrong size (for device=%d)", device); | |
| return -1; | |
| } | |
| /* Try to fetch monitor name */ | |
| mnl = elddata[4] & 0x1f; | |
| if (mnl == 0 || mnl > 16 || 20 + mnl > eldsize) { | |
| pa_log_debug("No monitor name in ELD info (for device=%d)", device); | |
| mnl = 0; | |
| } | |
| memcpy(eld->monitor_name, &elddata[20], mnl); | |
| eld->monitor_name[mnl] = '\0'; | |
| if (mnl) | |
| pa_log_debug("Monitor name in ELD info is '%s' (for device=%d)", eld->monitor_name, device); | |
| return 0; | |
| } |