diff options
Diffstat (limited to 'cras/src/server/dev_io.c')
| -rw-r--r-- | cras/src/server/dev_io.c | 1583 |
1 files changed, 0 insertions, 1583 deletions
diff --git a/cras/src/server/dev_io.c b/cras/src/server/dev_io.c deleted file mode 100644 index b311b221..00000000 --- a/cras/src/server/dev_io.c +++ /dev/null @@ -1,1583 +0,0 @@ -/* Copyright 2017 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#include <poll.h> -#include <stdbool.h> -#include <syslog.h> - -#include "audio_thread_log.h" -#include "cras_audio_area.h" -#include "cras_audio_thread_monitor.h" -#include "cras_device_monitor.h" -#include "cras_iodev.h" -#include "cras_non_empty_audio_handler.h" -#include "cras_rstream.h" -#include "cras_server_metrics.h" -#include "dev_stream.h" -#include "input_data.h" -#include "polled_interval_checker.h" -#include "rate_estimator.h" -#include "utlist.h" - -#include "dev_io.h" - -static const struct timespec playback_wake_fuzz_ts = { - 0, 500 * 1000 /* 500 usec. */ -}; - -/* The maximum time to wait before checking the device's non-empty status. */ -static const int NON_EMPTY_UPDATE_INTERVAL_SEC = 5; - -/* - * The minimum number of consecutive seconds of empty audio that must be - * played before a device is considered to be playing empty audio. - */ -static const int MIN_EMPTY_PERIOD_SEC = 30; - -/* - * When the hw_level is less than this time, do not drop frames. - * (unit: millisecond). - * TODO(yuhsuan): Reduce the threshold when we create the other overrun op for - * boards which captures a lot of frames at one time. - * e.g. Input devices on grunt reads 1024 frames each time. - */ -static const int DROP_FRAMES_THRESHOLD_MS = 50; - -/* The number of devices playing/capturing non-empty stream(s). */ -static int non_empty_device_count = 0; - -/* The timestamp of last EIO error time. */ -static struct timespec last_io_err_time = { 0, 0 }; - -/* The gap time to avoid repeated error close request to main thread. */ -static const int ERROR_CLOSE_GAP_TIME_SECS = 10; - -/* Gets the main device which the stream is attached to. */ -static inline struct cras_iodev *get_main_dev(const struct dev_stream *stream) -{ - return (struct cras_iodev *)stream->stream->main_dev.dev_ptr; -} - -/* Updates the estimated sample rate of open device to all attached - * streams. - */ -static void update_estimated_rate(struct open_dev *adev, - struct open_dev *odev_list, - bool self_rate_need_update) -{ - struct cras_iodev *main_dev; - struct cras_iodev *dev = adev->dev; - struct cras_iodev *tracked_dev = NULL; - struct dev_stream *dev_stream; - double dev_rate_ratio; - double main_dev_rate_ratio; - - /* - * If there is an output device on the same sound card running with the same - * sampling rate, use the rate of that output device for this device. - */ - if (dev->direction == CRAS_STREAM_INPUT && - cras_iodev_is_on_internal_card(dev->active_node)) { - struct open_dev *odev; - DL_FOREACH (odev_list, odev) { - if (!cras_iodev_is_on_internal_card( - odev->dev->active_node)) - continue; - if (odev->dev->format->frame_rate != - dev->format->frame_rate) - continue; - tracked_dev = odev->dev; - break; - } - } - - /* - * Self-owned rate esimator does not need to udpate rate. There is no tracked - * output device. So there is no need to update. - */ - if (!self_rate_need_update && !tracked_dev) - return; - - DL_FOREACH (dev->streams, dev_stream) { - main_dev = get_main_dev(dev_stream); - if (main_dev == NULL) { - syslog(LOG_ERR, "Fail to find main open dev."); - continue; - } - - if (tracked_dev) { - dev_rate_ratio = - cras_iodev_get_est_rate_ratio(tracked_dev); - main_dev_rate_ratio = dev_rate_ratio; - } else { - dev_rate_ratio = cras_iodev_get_est_rate_ratio(dev); - main_dev_rate_ratio = - cras_iodev_get_est_rate_ratio(main_dev); - } - - dev_stream_set_dev_rate(dev_stream, dev->format->frame_rate, - dev_rate_ratio, main_dev_rate_ratio, - adev->coarse_rate_adjust); - } -} - -/* - * Counts the number of devices which are currently playing/capturing non-empty - * audio. - */ -static inline int count_non_empty_dev(struct open_dev *adevs) -{ - int count = 0; - struct open_dev *adev; - DL_FOREACH (adevs, adev) { - if (!adev->empty_pi || !pic_interval_elapsed(adev->empty_pi)) - count++; - } - return count; -} - -int dev_io_check_non_empty_state_transition(struct open_dev *adevs) -{ - int new_non_empty_dev_count = count_non_empty_dev(adevs); - - // If we have transitioned to or from a state with 0 non-empty devices, - // notify the main thread to update system state. - if ((non_empty_device_count == 0) != (new_non_empty_dev_count == 0)) - cras_non_empty_audio_send_msg(new_non_empty_dev_count > 0 ? 1 : - 0); - - non_empty_device_count = new_non_empty_dev_count; - return non_empty_device_count > 0; -} - -/* Checks whether it is time to fetch. */ -static bool is_time_to_fetch(const struct dev_stream *dev_stream, - struct timespec now) -{ - const struct timespec *next_cb_ts; - next_cb_ts = dev_stream_next_cb_ts(dev_stream); - if (!next_cb_ts) - return 0; - - /* - * Check if it's time to get more data from this stream. - * Allow for waking up a little early. - */ - add_timespecs(&now, &playback_wake_fuzz_ts); - if (timespec_after(&now, next_cb_ts)) - return 1; - - return 0; -} - -/* The log only accepts uint32 arguments, so the float power - * must be written as bits and assumed to have a float when - * parsing the log. - */ -static uint32_t get_ewma_power_as_int(struct ewma_power *ewma) -{ - uint32_t pow_as_int = 0; - - if (sizeof(uint32_t) == sizeof(float)) - memcpy(&pow_as_int, &ewma->power, sizeof(uint32_t)); - return pow_as_int; -} - -/* Asks any stream with room for more data. Sets the time stamp for all streams. - * Args: - * adev - The output device streams are attached to. - * Returns: - * 0 on success, negative error on failure. If failed, can assume that all - * streams have been removed from the device. - */ -static int fetch_streams(struct open_dev *adev) -{ - struct dev_stream *dev_stream; - struct cras_iodev *odev = adev->dev; - int rc; - int delay; - - delay = cras_iodev_delay_frames(odev); - if (delay < 0) - return delay; - - DL_FOREACH (adev->dev->streams, dev_stream) { - struct cras_rstream *rstream = dev_stream->stream; - struct cras_audio_shm *shm = cras_rstream_shm(rstream); - struct timespec now; - - clock_gettime(CLOCK_MONOTONIC_RAW, &now); - - if (dev_stream_is_pending_reply(dev_stream)) { - dev_stream_flush_old_audio_messages(dev_stream); - cras_rstream_record_fetch_interval(dev_stream->stream, - &now); - } - - if (!dev_stream_is_running(dev_stream)) - continue; - - if (!is_time_to_fetch(dev_stream, now)) - continue; - - if (cras_shm_get_frames(shm) < 0) - cras_rstream_set_is_draining(rstream, 1); - - if (cras_rstream_get_is_draining(dev_stream->stream)) - continue; - - /* - * Skip fetching if client still has not replied yet. - */ - if (cras_rstream_is_pending_reply(rstream)) { - ATLOG(atlog, AUDIO_THREAD_STREAM_FETCH_PENDING, - cras_rstream_id(rstream), 0, 0); - continue; - } - - /* - * Skip fetching if there are enough frames in shared memory. - */ - if (!cras_shm_is_buffer_available(shm)) { - ATLOG(atlog, AUDIO_THREAD_STREAM_SKIP_CB, - cras_rstream_id(rstream), - shm->header->write_offset[0], - shm->header->write_offset[1]); - dev_stream_update_next_wake_time(dev_stream); - cras_server_metrics_missed_cb_event(dev_stream->stream); - continue; - } - - dev_stream_set_delay(dev_stream, delay); - - ATLOG(atlog, AUDIO_THREAD_FETCH_STREAM, rstream->stream_id, - cras_rstream_get_cb_threshold(rstream), - get_ewma_power_as_int(&rstream->ewma)); - - rc = dev_stream_request_playback_samples(dev_stream, &now); - if (rc < 0) { - syslog(LOG_ERR, "fetch err: %d for %x", rc, - cras_rstream_id(rstream)); - cras_rstream_set_is_draining(rstream, 1); - } - } - - return 0; -} - -/* Gets the max delay frames of open input devices. */ -static int input_delay_frames(struct open_dev *adevs) -{ - struct open_dev *adev; - int delay; - int max_delay = 0; - - DL_FOREACH (adevs, adev) { - if (!cras_iodev_is_open(adev->dev)) - continue; - delay = cras_iodev_delay_frames(adev->dev); - if (delay < 0) - return delay; - if (delay > max_delay) - max_delay = delay; - } - return max_delay; -} - -/* Sets the stream delay. - * Args: - * adev[in] - The device to capture from. - */ -static unsigned int set_stream_delay(struct open_dev *adev) -{ - struct dev_stream *stream; - int delay; - - /* TODO(dgreid) - Setting delay from last dev only. */ - delay = input_delay_frames(adev); - - DL_FOREACH (adev->dev->streams, stream) { - if (stream->stream->flags & TRIGGER_ONLY) - continue; - - dev_stream_set_delay(stream, delay); - } - - return 0; -} - -/* Gets the minimum amount of space available for writing across all streams. - * Args: - * adev[in] - The device to capture from. - * write_limit[in] - Initial limit to number of frames to capture. - * limit_stream[out] - The pointer to the pointer of stream which - * causes capture limit. - * Output NULL if there is no stream that causes - * capture limit less than the initial limit. - */ -static unsigned int get_stream_limit(struct open_dev *adev, - unsigned int write_limit, - struct dev_stream **limit_stream) -{ - struct cras_rstream *rstream; - struct cras_audio_shm *shm; - struct dev_stream *stream; - unsigned int avail; - - *limit_stream = NULL; - - DL_FOREACH (adev->dev->streams, stream) { - rstream = stream->stream; - if (rstream->flags & TRIGGER_ONLY) - continue; - - shm = cras_rstream_shm(rstream); - if (cras_shm_check_write_overrun(shm)) - ATLOG(atlog, AUDIO_THREAD_READ_OVERRUN, - adev->dev->info.idx, rstream->stream_id, - shm->header->num_overruns); - avail = dev_stream_capture_avail(stream); - if (avail < write_limit) { - write_limit = avail; - *limit_stream = stream; - } - } - - return write_limit; -} - -/* - * The minimum wake time for a input device, which is 5ms. It's only used by - * function get_input_dev_max_wake_ts. - */ -static const struct timespec min_input_dev_wake_ts = { - 0, 5 * 1000 * 1000 /* 5 ms. */ -}; - -/* - * Get input device maximum sleep time, which is the approximate time that the - * device will have hw_level = buffer_size / 2 samples. Some devices have - * capture period = 2 so the audio_thread should wake up and consume some - * samples from hardware at that time. To prevent busy loop occurs, the returned - * sleep time should be >= 5ms. - * - * Returns: 0 on success negative error on device failure. - */ -static int get_input_dev_max_wake_ts(struct open_dev *adev, - unsigned int curr_level, - struct timespec *res_ts) -{ - struct timespec dev_wake_ts, now; - unsigned int dev_rate, half_buffer_size, target_frames; - - if (!adev || !adev->dev || !adev->dev->format || - !adev->dev->format->frame_rate || !adev->dev->buffer_size) - return -EINVAL; - - *res_ts = min_input_dev_wake_ts; - - dev_rate = adev->dev->format->frame_rate; - half_buffer_size = adev->dev->buffer_size / 2; - if (curr_level < half_buffer_size) - target_frames = half_buffer_size - curr_level; - else - target_frames = 0; - - cras_frames_to_time(target_frames, dev_rate, &dev_wake_ts); - - if (timespec_after(&dev_wake_ts, res_ts)) { - *res_ts = dev_wake_ts; - } - - clock_gettime(CLOCK_MONOTONIC_RAW, &now); - add_timespecs(res_ts, &now); - return 0; -} - -/* Returns whether a device can drop samples. */ -static bool input_devices_can_drop_samples(struct cras_iodev *iodev) -{ - if (!cras_iodev_is_open(iodev)) - return false; - if (!iodev->streams) - return false; - if (!iodev->active_node || - iodev->active_node->type == CRAS_NODE_TYPE_HOTWORD || - iodev->active_node->type == CRAS_NODE_TYPE_POST_MIX_PRE_DSP || - iodev->active_node->type == CRAS_NODE_TYPE_POST_DSP) - return false; - return true; -} - -/* - * Set wake_ts for this device to be the earliest wake up time for - * dev_streams. Default value for adev->wake_ts will be now + 20s even if - * any error occurs in this function. - * Args: - * adev - The input device. - * need_to_drop - The pointer to store whether we need to drop samples from - * a device in order to keep the lower hw_level. - * Returns: - * 0 on success. Negative error code on failure. - */ -static int set_input_dev_wake_ts(struct open_dev *adev, bool *need_to_drop) -{ - int rc; - struct timespec level_tstamp, wake_time_out, min_ts, now, dev_wake_ts; - unsigned int curr_level, cap_limit; - struct dev_stream *stream; - struct dev_stream *cap_limit_stream; - - /* Limit the sleep time to 20 seconds. */ - min_ts.tv_sec = 20; - min_ts.tv_nsec = 0; - clock_gettime(CLOCK_MONOTONIC_RAW, &now); - add_timespecs(&min_ts, &now); - /* Set default value for device wake_ts. */ - adev->wake_ts = min_ts; - - rc = cras_iodev_frames_queued(adev->dev, &level_tstamp); - if (rc < 0) - return rc; - curr_level = rc; - if (!timespec_is_nonzero(&level_tstamp)) - clock_gettime(CLOCK_MONOTONIC_RAW, &level_tstamp); - - /* - * Drop frames from all devices if any device meets these requirements: - * 1. The hw_level is larger than largest_cb_level * 1.5 or larger than - * buffer_size * 0.5. - * 2. The time of those frames is larger than DROP_FRAMES_THRESHOLD_MS. - */ - if (input_devices_can_drop_samples(adev->dev) && - (rc >= adev->dev->largest_cb_level * 1.5 || - rc >= adev->dev->buffer_size * 0.5) && - cras_frames_to_ms(rc, adev->dev->format->frame_rate) >= - DROP_FRAMES_THRESHOLD_MS) - *need_to_drop = true; - - cap_limit = get_stream_limit(adev, UINT_MAX, &cap_limit_stream); - - /* - * Loop through streams to find the earliest time audio thread - * should wake up. - */ - DL_FOREACH (adev->dev->streams, stream) { - wake_time_out = min_ts; - rc = dev_stream_wake_time(stream, curr_level, &level_tstamp, - cap_limit, cap_limit_stream == stream, - &wake_time_out); - - /* - * rc > 0 means there is no need to set wake up time for this - * stream. - */ - if (rc > 0) - continue; - - if (rc < 0) - return rc; - - if (timespec_after(&min_ts, &wake_time_out)) { - min_ts = wake_time_out; - } - } - - /* If there's no room in streams, don't bother schedule wake for more - * input data. */ - if (adev->dev->active_node && - adev->dev->active_node->type != CRAS_NODE_TYPE_HOTWORD && - cap_limit) { - rc = get_input_dev_max_wake_ts(adev, curr_level, &dev_wake_ts); - if (rc < 0) { - syslog(LOG_ERR, - "Failed to call get_input_dev_max_wake_ts." - "rc = %d", - rc); - } else if (timespec_after(&min_ts, &dev_wake_ts)) { - min_ts = dev_wake_ts; - } - } - - adev->wake_ts = min_ts; - return rc; -} - -/* Read samples from an input device to the specified stream. - * Args: - * adev - The device to capture samples from. - * Returns 0 on success. - */ -static int capture_to_streams(struct open_dev *adev, struct open_dev *odev_list) -{ - struct cras_iodev *idev = adev->dev; - snd_pcm_uframes_t remainder, hw_level, cap_limit; - struct timespec hw_tstamp; - int rc; - struct dev_stream *cap_limit_stream; - struct dev_stream *stream; - - DL_FOREACH (adev->dev->streams, stream) - dev_stream_flush_old_audio_messages(stream); - - rc = cras_iodev_frames_queued(idev, &hw_tstamp); - if (rc < 0) - return rc; - hw_level = rc; - - cras_iodev_update_highest_hw_level(idev, hw_level); - - ATLOG(atlog, AUDIO_THREAD_READ_AUDIO_TSTAMP, idev->info.idx, - hw_tstamp.tv_sec, hw_tstamp.tv_nsec); - if (timespec_is_nonzero(&hw_tstamp)) { - bool self_rate_need_update; - - if (hw_level < idev->min_cb_level / 2) - adev->coarse_rate_adjust = 1; - else if (hw_level > idev->max_cb_level * 2) - adev->coarse_rate_adjust = -1; - else - adev->coarse_rate_adjust = 0; - - /* - * This values means whether the rate estimator in the device - * wants to update estimated rate. - */ - self_rate_need_update = - !!cras_iodev_update_rate(idev, hw_level, &hw_tstamp); - - /* - * Always calls update_estimated_rate so that new output rate - * has a chance to propagate to input. In update_estimated_rate, - * it will decide whether the new rate is from self rate estimator - * or from the tracked output device. - */ - update_estimated_rate(adev, odev_list, self_rate_need_update); - } - - cap_limit = get_stream_limit(adev, hw_level, &cap_limit_stream); - set_stream_delay(adev); - - remainder = MIN(hw_level, cap_limit); - - ATLOG(atlog, AUDIO_THREAD_READ_AUDIO, idev->info.idx, hw_level, - remainder); - - if (cras_iodev_state(idev) != CRAS_IODEV_STATE_NORMAL_RUN) - return 0; - - while (remainder > 0) { - struct cras_audio_area *area = NULL; - unsigned int nread, total_read; - - nread = remainder; - - rc = cras_iodev_get_input_buffer(idev, &nread); - if (rc < 0 || nread == 0) - return rc; - - DL_FOREACH (adev->dev->streams, stream) { - unsigned int this_read; - unsigned int area_offset; - float software_gain_scaler; - - if ((stream->stream->flags & TRIGGER_ONLY) && - stream->stream->triggered) - continue; - - input_data_get_for_stream(idev->input_data, - stream->stream, - idev->buf_state, &area, - &area_offset); - - /* - * The UI gain scaler should always take effect. - * input_data will decide if stream and iodev internal - * software gains should be used or not, based on use - * case. - */ - software_gain_scaler = - cras_iodev_get_ui_gain_scaler(idev) * - input_data_get_software_gain_scaler( - idev->input_data, - idev->software_gain_scaler, - stream->stream); - - this_read = - dev_stream_capture(stream, area, area_offset, - software_gain_scaler); - - input_data_put_for_stream(idev->input_data, - stream->stream, - idev->buf_state, this_read); - } - - rc = cras_iodev_put_input_buffer(idev); - if (rc < 0) - return rc; - - total_read = rc; - remainder -= nread; - - if (total_read < nread) - break; - } - - ATLOG(atlog, AUDIO_THREAD_READ_AUDIO_DONE, remainder, - get_ewma_power_as_int(&idev->ewma), 0); - - return 0; -} - -/* Fill the buffer with samples from the attached streams. - * Args: - * odevs - The list of open output devices, provided so streams can be - * removed from all devices on error. - * adev - The device to write to. - * dst - The buffer to put the samples in (returned from snd_pcm_mmap_begin) - * write_limit - The maximum number of frames to write to dst. - * - * Returns: - * The number of frames rendered on success. - * This number of frames is the minimum of the amount of frames each stream - * could provide which is the maximum that can currently be rendered. - */ -static unsigned int write_streams(struct open_dev **odevs, - struct open_dev *adev, uint8_t *dst, - size_t write_limit) -{ - struct cras_iodev *odev = adev->dev; - struct dev_stream *curr; - unsigned int max_offset = 0; - unsigned int frame_bytes = cras_get_format_bytes(odev->format); - unsigned int num_playing = 0; - unsigned int drain_limit = write_limit; - - /* Mix as much as we can, the minimum fill level of any stream. */ - max_offset = cras_iodev_max_stream_offset(odev); - - /* Mix as much as we can, the minimum fill level of any stream. */ - DL_FOREACH (adev->dev->streams, curr) { - int dev_frames; - - /* Skip stream which hasn't started running yet. */ - if (!dev_stream_is_running(curr)) - continue; - - /* If this is a single output dev stream, updates the latest - * number of frames for playback. */ - if (dev_stream_attached_devs(curr) == 1) - dev_stream_update_frames(curr); - - dev_frames = dev_stream_playback_frames(curr); - if (dev_frames < 0) { - dev_io_remove_stream(odevs, curr->stream, NULL); - continue; - } - ATLOG(atlog, AUDIO_THREAD_WRITE_STREAMS_STREAM, - curr->stream->stream_id, dev_frames, - dev_stream_is_pending_reply(curr)); - if (cras_rstream_get_is_draining(curr->stream)) { - drain_limit = MIN((size_t)dev_frames, drain_limit); - if (!dev_frames) - dev_io_remove_stream(odevs, curr->stream, NULL); - } else { - write_limit = MIN((size_t)dev_frames, write_limit); - num_playing++; - } - } - - if (!num_playing) - write_limit = drain_limit; - - if (write_limit > max_offset) - memset(dst + max_offset * frame_bytes, 0, - (write_limit - max_offset) * frame_bytes); - - ATLOG(atlog, AUDIO_THREAD_WRITE_STREAMS_MIX, write_limit, max_offset, - 0); - - DL_FOREACH (adev->dev->streams, curr) { - unsigned int offset; - int nwritten; - - if (!dev_stream_is_running(curr)) - continue; - - offset = cras_iodev_stream_offset(odev, curr); - if (offset >= write_limit) - continue; - nwritten = dev_stream_mix(curr, odev->format, - dst + frame_bytes * offset, - write_limit - offset); - - if (nwritten < 0) { - dev_io_remove_stream(odevs, curr->stream, NULL); - continue; - } - - cras_iodev_stream_written(odev, curr, nwritten); - } - - write_limit = cras_iodev_all_streams_written(odev); - - ATLOG(atlog, AUDIO_THREAD_WRITE_STREAMS_MIXED, write_limit, 0, 0); - - return write_limit; -} - -/* Update next wake up time of the device. - * Args: - * adev[in] - The device to update to. - * hw_level[out] - Pointer to number of frames in hardware. - */ -void update_dev_wakeup_time(struct open_dev *adev, unsigned int *hw_level) -{ - struct timespec now; - struct timespec sleep_time; - double est_rate; - unsigned int frames_to_play_in_sleep; - - clock_gettime(CLOCK_MONOTONIC_RAW, &now); - - frames_to_play_in_sleep = cras_iodev_frames_to_play_in_sleep( - adev->dev, hw_level, &adev->wake_ts); - if (!timespec_is_nonzero(&adev->wake_ts)) - adev->wake_ts = now; - - if (cras_iodev_state(adev->dev) == CRAS_IODEV_STATE_NORMAL_RUN) - cras_iodev_update_highest_hw_level(adev->dev, *hw_level); - - est_rate = adev->dev->format->frame_rate * - cras_iodev_get_est_rate_ratio(adev->dev); - - ATLOG(atlog, AUDIO_THREAD_SET_DEV_WAKE, adev->dev->info.idx, *hw_level, - frames_to_play_in_sleep); - - cras_frames_to_time_precise(frames_to_play_in_sleep, est_rate, - &sleep_time); - - add_timespecs(&adev->wake_ts, &sleep_time); - - ATLOG(atlog, AUDIO_THREAD_DEV_SLEEP_TIME, adev->dev->info.idx, - adev->wake_ts.tv_sec, adev->wake_ts.tv_nsec); -} - -/* Returns 0 on success negative error on device failure. */ -int write_output_samples(struct open_dev **odevs, struct open_dev *adev, - struct cras_fmt_conv *output_converter) -{ - struct cras_iodev *odev = adev->dev; - unsigned int hw_level; - struct timespec hw_tstamp; - unsigned int frames, fr_to_req; - snd_pcm_sframes_t written; - snd_pcm_uframes_t total_written = 0; - int rc; - int non_empty = 0; - int *non_empty_ptr = NULL; - uint8_t *dst = NULL; - struct cras_audio_area *area = NULL; - - /* Possibly fill zeros for no_stream state and possibly transit state. - */ - rc = cras_iodev_prepare_output_before_write_samples(odev); - if (rc < 0) { - syslog(LOG_ERR, "Failed to prepare output dev for write"); - return rc; - } - - if (cras_iodev_state(odev) != CRAS_IODEV_STATE_NORMAL_RUN) - return 0; - - rc = cras_iodev_frames_queued(odev, &hw_tstamp); - if (rc < 0) - return rc; - hw_level = rc; - - ATLOG(atlog, AUDIO_THREAD_FILL_AUDIO_TSTAMP, adev->dev->info.idx, - hw_tstamp.tv_sec, hw_tstamp.tv_nsec); - if (timespec_is_nonzero(&hw_tstamp)) { - if (hw_level < odev->min_cb_level / 2) - adev->coarse_rate_adjust = 1; - else if (hw_level > odev->max_cb_level * 2) - adev->coarse_rate_adjust = -1; - else - adev->coarse_rate_adjust = 0; - - if (cras_iodev_update_rate(odev, hw_level, &hw_tstamp)) - update_estimated_rate(adev, NULL, true); - } - ATLOG(atlog, AUDIO_THREAD_FILL_AUDIO, adev->dev->info.idx, hw_level, - odev->min_cb_level); - - /* Don't request more than hardware can hold. Note that min_buffer_level - * has been subtracted from the actual hw_level so we need to take it - * into account here. */ - fr_to_req = cras_iodev_buffer_avail(odev, hw_level); - - /* Have to loop writing to the device, will be at most 2 loops, this - * only happens when the circular buffer is at the end and returns us a - * partial area to write to from mmap_begin */ - while (total_written < fr_to_req) { - frames = fr_to_req - total_written; - rc = cras_iodev_get_output_buffer(odev, &area, &frames); - if (rc < 0) - return rc; - - /* TODO(dgreid) - This assumes interleaved audio. */ - dst = area->channels[0].buf; - written = write_streams(odevs, adev, dst, frames); - if (written < (snd_pcm_sframes_t)frames) - /* Got all the samples from client that we can, but it - * won't fill the request. */ - fr_to_req = 0; /* break out after committing samples */ - - // This interval is lazily initialized once per device. - // Note that newly opened devices are considered non-empty - // (until their status is updated through the normal flow). - if (!adev->non_empty_check_pi) { - adev->non_empty_check_pi = pic_polled_interval_create( - NON_EMPTY_UPDATE_INTERVAL_SEC); - } - - // If we were empty last iteration, or the sampling interval - // has elapsed, check for emptiness. - if (adev->empty_pi || - pic_interval_elapsed(adev->non_empty_check_pi)) { - non_empty_ptr = &non_empty; - pic_interval_reset(adev->non_empty_check_pi); - } - - rc = cras_iodev_put_output_buffer( - odev, dst, written, non_empty_ptr, output_converter); - - if (rc < 0) - return rc; - total_written += written; - - if (non_empty && adev->empty_pi) { - // We're not empty, but we were previously. - // Reset the empty period. - pic_polled_interval_destroy(&adev->empty_pi); - } - - if (non_empty_ptr && !non_empty && !adev->empty_pi) - // We checked for emptiness, we were empty, and we - // previously weren't. Start the empty period. - adev->empty_pi = pic_polled_interval_create( - MIN_EMPTY_PERIOD_SEC); - } - - ATLOG(atlog, AUDIO_THREAD_FILL_AUDIO_DONE, hw_level, total_written, - get_ewma_power_as_int(&odev->ewma)); - - return total_written; -} - -/* - * Chooses the smallest difference between hw_level and min_cb_level as the - * drop time. - */ -static void get_input_devices_drop_time(struct open_dev *idev_list, - struct timespec *reset_ts) -{ - struct open_dev *adev; - struct cras_iodev *iodev; - struct timespec tmp; - struct timespec hw_tstamp; - double est_rate; - unsigned int target_level; - bool is_set = false; - int rc; - - DL_FOREACH (idev_list, adev) { - iodev = adev->dev; - if (!input_devices_can_drop_samples(iodev)) - continue; - - rc = cras_iodev_frames_queued(iodev, &hw_tstamp); - if (rc < 0) { - syslog(LOG_ERR, "Get frames from device %d, rc = %d", - iodev->info.idx, rc); - continue; - } - - target_level = iodev->min_cb_level; - if (rc <= target_level) { - reset_ts->tv_sec = 0; - reset_ts->tv_nsec = 0; - return; - } - est_rate = iodev->format->frame_rate * - cras_iodev_get_est_rate_ratio(iodev); - cras_frames_to_time(rc - target_level, est_rate, &tmp); - - if (!is_set || timespec_after(reset_ts, &tmp)) { - *reset_ts = tmp; - is_set = true; - } - } -} - -/* - * Drop samples from all input devices. - */ -static void dev_io_drop_samples(struct open_dev *idev_list) -{ - struct open_dev *adev; - struct timespec drop_time = {}; - int rc; - - get_input_devices_drop_time(idev_list, &drop_time); - ATLOG(atlog, AUDIO_THREAD_CAPTURE_DROP_TIME, drop_time.tv_sec, - drop_time.tv_nsec, 0); - - if (timespec_is_zero(&drop_time)) - return; - - DL_FOREACH (idev_list, adev) { - if (!input_devices_can_drop_samples(adev->dev)) - continue; - - rc = cras_iodev_drop_frames_by_time(adev->dev, drop_time); - if (rc < 0) { - syslog(LOG_ERR, - "Failed to drop frames from device %d, rc = %d", - adev->dev->info.idx, rc); - continue; - } - } - - cras_audio_thread_event_drop_samples(); - - return; -} - -/* - * Public funcitons. - */ - -int dev_io_send_captured_samples(struct open_dev *idev_list) -{ - struct open_dev *adev; - bool need_to_drop = false; - int rc; - - // TODO(dgreid) - once per rstream, not once per dev_stream. - DL_FOREACH (idev_list, adev) { - struct dev_stream *stream; - - if (!cras_iodev_is_open(adev->dev)) - continue; - - /* Post samples to rstream if there are enough samples. */ - DL_FOREACH (adev->dev->streams, stream) { - dev_stream_capture_update_rstream(stream); - } - - /* Set wake_ts for this device. */ - rc = set_input_dev_wake_ts(adev, &need_to_drop); - if (rc < 0) - return rc; - } - - if (need_to_drop) - dev_io_drop_samples(idev_list); - - return 0; -} - -static void handle_dev_err(int err_rc, struct open_dev **odevs, - struct open_dev *adev) -{ - struct timespec diff, now; - if (err_rc == -EPIPE) { - /* Handle severe underrun. */ - ATLOG(atlog, AUDIO_THREAD_SEVERE_UNDERRUN, adev->dev->info.idx, - 0, 0); - cras_iodev_reset_request(adev->dev); - cras_audio_thread_event_severe_underrun(); - } else if (err_rc == -EIO) { - syslog(LOG_WARNING, "I/O err, reseting %s dev %s", - adev->dev->direction == CRAS_STREAM_OUTPUT ? "output" : - "input", - adev->dev->info.name); - clock_gettime(CLOCK_REALTIME, &now); - subtract_timespecs(&now, &last_io_err_time, &diff); - if ((last_io_err_time.tv_sec == 0 && - last_io_err_time.tv_nsec == 0) || - diff.tv_sec > ERROR_CLOSE_GAP_TIME_SECS) - cras_iodev_reset_request(adev->dev); - else - cras_device_monitor_error_close(adev->dev->info.idx); - - last_io_err_time = now; - } else { - syslog(LOG_ERR, "Dev %s err %d", adev->dev->info.name, err_rc); - } - /* Device error, remove it. */ - dev_io_rm_open_dev(odevs, adev); -} - -int dev_io_capture(struct open_dev **list, struct open_dev **olist) -{ - struct open_dev *idev_list = *list; - struct open_dev *odev_list = *olist; - struct open_dev *adev; - int rc; - - DL_FOREACH (idev_list, adev) { - if (!cras_iodev_is_open(adev->dev)) - continue; - rc = capture_to_streams(adev, odev_list); - if (rc < 0) - handle_dev_err(rc, list, adev); - } - - return 0; -} - -/* If it is the time to fetch, start dev_stream. */ -static void dev_io_check_dev_stream_start(struct open_dev *adev) -{ - struct dev_stream *dev_stream; - struct timespec now; - clock_gettime(CLOCK_MONOTONIC_RAW, &now); - - DL_FOREACH (adev->dev->streams, dev_stream) { - if (!is_time_to_fetch(dev_stream, now)) - continue; - if (!dev_stream_is_running(dev_stream)) - cras_iodev_start_stream(adev->dev, dev_stream); - } -} - -void dev_io_playback_fetch(struct open_dev *odev_list) -{ - struct open_dev *adev; - - /* Check whether it is the time to start dev_stream before fetching. */ - DL_FOREACH (odev_list, adev) { - if (!cras_iodev_is_open(adev->dev)) - continue; - dev_io_check_dev_stream_start(adev); - } - - DL_FOREACH (odev_list, adev) { - if (!cras_iodev_is_open(adev->dev)) - continue; - fetch_streams(adev); - } -} - -int dev_io_playback_write(struct open_dev **odevs, - struct cras_fmt_conv *output_converter) -{ - struct open_dev *adev; - struct dev_stream *curr; - int rc; - unsigned int hw_level, total_written; - - /* For multiple output case, update the number of queued frames in shm - * of all streams before starting write output samples. */ - adev = *odevs; - if (adev && adev->next) { - DL_FOREACH (*odevs, adev) { - DL_FOREACH (adev->dev->streams, curr) - dev_stream_update_frames(curr); - } - } - - DL_FOREACH (*odevs, adev) { - if (!cras_iodev_is_open(adev->dev)) - continue; - - rc = write_output_samples(odevs, adev, output_converter); - if (rc < 0) { - handle_dev_err(rc, odevs, adev); - } else { - total_written = rc; - - /* - * Skip the underrun check and device wake up time update if - * device should not wake up. - */ - if (!cras_iodev_odev_should_wake(adev->dev)) - continue; - - /* - * Update device wake up time and get the new hardware - * level. - */ - update_dev_wakeup_time(adev, &hw_level); - - /* - * If new hardware level is less than or equal to the - * written frames, we can suppose underrun happened. But - * keep in mind there may have a false positive. If - * hardware level changed just after frames being - * written, we may get hw_level <= total_written here - * without underrun happened. However, we can still - * treat it as underrun because it is an abnormal state - * we should handle it. - */ - if (hw_level <= total_written) { - rc = cras_iodev_output_underrun( - adev->dev, hw_level, total_written); - if (rc < 0) { - handle_dev_err(rc, odevs, adev); - } else { - update_dev_wakeup_time(adev, &hw_level); - } - } - } - } - - /* TODO(dgreid) - once per rstream, not once per dev_stream. */ - DL_FOREACH (*odevs, adev) { - struct dev_stream *stream; - if (!cras_iodev_is_open(adev->dev)) - continue; - DL_FOREACH (adev->dev->streams, stream) { - dev_stream_playback_update_rstream(stream); - } - } - - return 0; -} - -static void update_longest_wake(struct open_dev *dev_list, - const struct timespec *ts) -{ - struct open_dev *adev; - struct timespec wake_interval; - - DL_FOREACH (dev_list, adev) { - if (adev->dev->streams == NULL) - continue; - /* - * Calculate longest wake only when there's stream attached - * and the last wake time has been set. - */ - if (adev->last_wake.tv_sec) { - subtract_timespecs(ts, &adev->last_wake, - &wake_interval); - if (timespec_after(&wake_interval, &adev->longest_wake)) - adev->longest_wake = wake_interval; - } - adev->last_wake = *ts; - } -} - -void dev_io_run(struct open_dev **odevs, struct open_dev **idevs, - struct cras_fmt_conv *output_converter) -{ - struct timespec now; - - clock_gettime(CLOCK_MONOTONIC_RAW, &now); - pic_update_current_time(); - update_longest_wake(*odevs, &now); - update_longest_wake(*idevs, &now); - - dev_io_playback_fetch(*odevs); - dev_io_capture(idevs, odevs); - dev_io_send_captured_samples(*idevs); - dev_io_playback_write(odevs, output_converter); -} - -static int input_adev_ignore_wake(const struct open_dev *adev) -{ - if (!cras_iodev_is_open(adev->dev)) - return 1; - - if (!adev->dev->active_node) - return 1; - - if (adev->dev->active_node->type == CRAS_NODE_TYPE_HOTWORD && - !cras_iodev_input_streaming(adev->dev)) - return 1; - - return 0; -} - -int dev_io_next_input_wake(struct open_dev **idevs, struct timespec *min_ts) -{ - struct open_dev *adev; - int ret = 0; /* The total number of devices to wait on. */ - - DL_FOREACH (*idevs, adev) { - if (input_adev_ignore_wake(adev)) - continue; - ret++; - ATLOG(atlog, AUDIO_THREAD_DEV_SLEEP_TIME, adev->dev->info.idx, - adev->wake_ts.tv_sec, adev->wake_ts.tv_nsec); - if (timespec_after(min_ts, &adev->wake_ts)) - *min_ts = adev->wake_ts; - } - - return ret; -} - -/* Fills the time that the next stream needs to be serviced. */ -static int get_next_stream_wake_from_list(struct dev_stream *streams, - struct timespec *min_ts) -{ - struct dev_stream *dev_stream; - int ret = 0; /* The total number of streams to wait on. */ - - DL_FOREACH (streams, dev_stream) { - const struct timespec *next_cb_ts; - - if (cras_rstream_get_is_draining(dev_stream->stream)) - continue; - - if (cras_rstream_is_pending_reply(dev_stream->stream)) - continue; - - next_cb_ts = dev_stream_next_cb_ts(dev_stream); - if (!next_cb_ts) - continue; - - ATLOG(atlog, AUDIO_THREAD_STREAM_SLEEP_TIME, - dev_stream->stream->stream_id, next_cb_ts->tv_sec, - next_cb_ts->tv_nsec); - if (timespec_after(min_ts, next_cb_ts)) - *min_ts = *next_cb_ts; - ret++; - } - - return ret; -} - -int dev_io_next_output_wake(struct open_dev **odevs, struct timespec *min_ts) -{ - struct open_dev *adev; - int ret = 0; - - DL_FOREACH (*odevs, adev) - ret += get_next_stream_wake_from_list(adev->dev->streams, - min_ts); - - DL_FOREACH (*odevs, adev) { - if (!cras_iodev_odev_should_wake(adev->dev)) - continue; - - ret++; - if (timespec_after(min_ts, &adev->wake_ts)) - *min_ts = adev->wake_ts; - } - - return ret; -} - -struct open_dev *dev_io_find_open_dev(struct open_dev *odev_list, - unsigned int dev_idx) -{ - struct open_dev *odev; - DL_FOREACH (odev_list, odev) - if (odev->dev->info.idx == dev_idx) - return odev; - return NULL; -} - -void dev_io_rm_open_dev(struct open_dev **odev_list, struct open_dev *dev_to_rm) -{ - struct open_dev *odev; - struct dev_stream *dev_stream; - - /* Do nothing if dev_to_rm wasn't already in the active dev list. */ - DL_FOREACH (*odev_list, odev) { - if (odev == dev_to_rm) - break; - } - if (!odev) - return; - - DL_DELETE(*odev_list, dev_to_rm); - - /* Metrics logs the number of underruns of this device. */ - cras_server_metrics_num_underruns( - cras_iodev_get_num_underruns(dev_to_rm->dev)); - - /* Metrics logs the delay of this device. */ - cras_server_metrics_highest_device_delay( - dev_to_rm->dev->highest_hw_level, - dev_to_rm->dev->largest_cb_level, dev_to_rm->dev->direction); - - /* Metrics logs the highest_hw_level of this device. */ - cras_server_metrics_highest_hw_level(dev_to_rm->dev->highest_hw_level, - dev_to_rm->dev->direction); - - dev_io_check_non_empty_state_transition(*odev_list); - - ATLOG(atlog, AUDIO_THREAD_DEV_REMOVED, dev_to_rm->dev->info.idx, 0, 0); - - DL_FOREACH (dev_to_rm->dev->streams, dev_stream) { - cras_iodev_rm_stream(dev_to_rm->dev, dev_stream->stream); - dev_stream_destroy(dev_stream); - } - - if (dev_to_rm->empty_pi) - pic_polled_interval_destroy(&dev_to_rm->empty_pi); - if (dev_to_rm->non_empty_check_pi) - pic_polled_interval_destroy(&dev_to_rm->non_empty_check_pi); - free(dev_to_rm); -} - -static void delete_stream_from_dev(struct cras_iodev *dev, - struct cras_rstream *stream) -{ - struct dev_stream *out; - - out = cras_iodev_rm_stream(dev, stream); - if (out) - dev_stream_destroy(out); -} - -/* - * Finds a matched input stream from open device list. - * The definition of the matched streams: Two streams having - * the same sampling rate and the same cb_threshold. - * This means their sleep time intervals should be very close - * if we neglect device estimated rate. - */ -static struct dev_stream * -find_matched_input_stream(const struct cras_rstream *out_stream, - struct open_dev *odev_list) -{ - struct open_dev *odev; - struct dev_stream *dev_stream; - size_t out_rate = out_stream->format.frame_rate; - size_t out_cb_threshold = cras_rstream_get_cb_threshold(out_stream); - - DL_FOREACH (odev_list, odev) { - DL_FOREACH (odev->dev->streams, dev_stream) { - if (dev_stream->stream->format.frame_rate != out_rate) - continue; - if (cras_rstream_get_cb_threshold(dev_stream->stream) != - out_cb_threshold) - continue; - return dev_stream; - } - } - return NULL; -} - -static bool -find_matched_input_stream_next_cb_ts(const struct cras_rstream *stream, - struct open_dev *odev_list, - const struct timespec **next_cb_ts, - const struct timespec **sleep_interval_ts) -{ - struct dev_stream *dev_stream = - find_matched_input_stream(stream, odev_list); - if (dev_stream) { - *next_cb_ts = dev_stream_next_cb_ts(dev_stream); - *sleep_interval_ts = dev_stream_sleep_interval_ts(dev_stream); - return *next_cb_ts != NULL; - } - return false; -} - -int dev_io_append_stream(struct open_dev **odevs, struct open_dev **idevs, - struct cras_rstream *stream, - struct cras_iodev **iodevs, unsigned int num_iodevs) -{ - struct open_dev **dev_list; - struct open_dev *open_dev; - struct cras_iodev *dev; - struct dev_stream *out; - struct timespec init_cb_ts; - const struct timespec *init_sleep_interval_ts = NULL; - struct timespec extra_sleep; - const struct timespec *stream_ts; - unsigned int i; - bool cb_ts_set = false; - int level; - int rc = 0; - - if (stream->direction == CRAS_STREAM_OUTPUT) - dev_list = odevs; - else - dev_list = idevs; - - for (i = 0; i < num_iodevs; i++) { - DL_SEARCH_SCALAR(*dev_list, open_dev, dev, iodevs[i]); - if (!open_dev) - continue; - - dev = iodevs[i]; - DL_SEARCH_SCALAR(dev->streams, out, stream, stream); - if (out) - continue; - - /* - * When dev transitions from no stream to the 1st stream, reset - * last_wake and longest_wake so it can start over the tracking. - */ - if (dev->streams == NULL) { - open_dev->last_wake.tv_sec = 0; - open_dev->last_wake.tv_nsec = 0; - open_dev->longest_wake.tv_sec = 0; - open_dev->longest_wake.tv_nsec = 0; - } - - /* - * When the first input stream is added, flush the input buffer - * so that we can read from multiple input devices of the same - * buffer level. - */ - if ((stream->direction == CRAS_STREAM_INPUT) && !dev->streams) { - int num_flushed = dev->flush_buffer(dev); - if (num_flushed < 0) { - rc = num_flushed; - break; - } - } - - /* - * For output, if open device already has stream, get the earliest next - * callback time from these streams to align with. Otherwise, check whether - * there are remaining frames in the device. Set the initial callback time to - * the time when hw_level of device is close to min_cb_level. - * If next callback time is too far from now, it will block writing and - * lower hardware level. Else if we fetch the new stream immediately, it - * may cause device buffer level stack up. - */ - if (stream->direction == CRAS_STREAM_OUTPUT) { - /* - * If there is a matched input stream, find its next cb time. - * Use that as the initial cb time for this output stream. - */ - const struct timespec *in_stream_ts; - const struct timespec *in_stream_sleep_interval_ts; - bool found_matched_input; - found_matched_input = - find_matched_input_stream_next_cb_ts( - stream, *idevs, &in_stream_ts, - &in_stream_sleep_interval_ts); - if (found_matched_input) { - init_cb_ts = *in_stream_ts; - init_sleep_interval_ts = - in_stream_sleep_interval_ts; - } else { - DL_FOREACH (dev->streams, out) { - stream_ts = dev_stream_next_cb_ts(out); - if (stream_ts && - (!cb_ts_set || - timespec_after(&init_cb_ts, - stream_ts))) { - init_cb_ts = *stream_ts; - cb_ts_set = true; - } - } - if (!cb_ts_set) { - level = cras_iodev_get_valid_frames( - dev, &init_cb_ts); - if (level < 0) { - syslog(LOG_ERR, - "Failed to set output init_cb_ts, rc = %d", - level); - rc = -EINVAL; - break; - } - level -= cras_frames_at_rate( - stream->format.frame_rate, - cras_rstream_get_cb_threshold( - stream), - dev->format->frame_rate); - if (level < 0) - level = 0; - cras_frames_to_time( - level, dev->format->frame_rate, - &extra_sleep); - add_timespecs(&init_cb_ts, - &extra_sleep); - } - } - } else { - /* - * For input streams, because audio thread can calculate wake up time - * by hw_level of input device, set the first cb_ts to zero. The stream - * will wake up when it gets enough samples to post. The next_cb_ts will - * be updated after its first post. - * - * TODO(yuhsuan) - Align the new stream fetch time to avoid getting a large - * delay. If a new stream with smaller block size starts when the hardware - * level is high, the hardware level will keep high after removing other - * old streams. - */ - init_cb_ts.tv_sec = 0; - init_cb_ts.tv_nsec = 0; - } - - out = dev_stream_create(stream, dev->info.idx, dev->format, dev, - &init_cb_ts, init_sleep_interval_ts); - if (!out) { - rc = -EINVAL; - break; - } - - cras_iodev_add_stream(dev, out); - - /* - * For multiple inputs case, if the new stream is not the first - * one to append, copy the 1st stream's offset to it so that - * future read offsets can be aligned across all input streams - * to avoid the deadlock scenario when multiple streams reading - * from multiple devices. - */ - if ((stream->direction == CRAS_STREAM_INPUT) && - (dev->streams != out)) { - unsigned int offset = - cras_iodev_stream_offset(dev, dev->streams); - if (offset > stream->cb_threshold) - offset = stream->cb_threshold; - cras_iodev_stream_written(dev, out, offset); - - offset = cras_rstream_dev_offset(dev->streams->stream, - dev->info.idx); - if (offset > stream->cb_threshold) - offset = stream->cb_threshold; - cras_rstream_dev_offset_update(stream, offset, - dev->info.idx); - } - ATLOG(atlog, AUDIO_THREAD_STREAM_ADDED, stream->stream_id, - dev->info.idx, 0); - } - - if (rc) { - DL_FOREACH (*dev_list, open_dev) { - dev = open_dev->dev; - DL_SEARCH_SCALAR(dev->streams, out, stream, stream); - if (!out) - continue; - - cras_iodev_rm_stream(dev, stream); - dev_stream_destroy(out); - } - } - - return rc; -} - -int dev_io_remove_stream(struct open_dev **dev_list, - struct cras_rstream *stream, struct cras_iodev *dev) -{ - struct open_dev *open_dev; - - ATLOG(atlog, AUDIO_THREAD_STREAM_REMOVED, stream->stream_id, 0, 0); - - if (dev == NULL) { - DL_FOREACH (*dev_list, open_dev) { - delete_stream_from_dev(open_dev->dev, stream); - } - } else { - delete_stream_from_dev(dev, stream); - } - - return 0; -} |