diff options
Diffstat (limited to 'cras/src/server/dev_stream.h')
| -rw-r--r-- | cras/src/server/dev_stream.h | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/cras/src/server/dev_stream.h b/cras/src/server/dev_stream.h deleted file mode 100644 index 6b34d5d7..00000000 --- a/cras/src/server/dev_stream.h +++ /dev/null @@ -1,234 +0,0 @@ -/* Copyright (c) 2014 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. - * - * The dev_stream structure is used for mapping streams to a device. In - * addition to the rstream, other mixing information is stored here. - */ - -#ifndef DEV_STREAM_H_ -#define DEV_STREAM_H_ - -#include <stdint.h> -#include <sys/time.h> - -#include "cras_types.h" -#include "cras_rstream.h" - -struct cras_audio_area; -struct cras_fmt_conv; -struct cras_iodev; - -/* - * Linked list of streams of audio from/to a client. - * Args: - * dev_id - Index of the hw device. - * stream - The rstream attached to a device. - * conv - Sample rate or format converter. - * conv_buffer - The buffer for converter if needed. - * conv_buffer_size_frames - Size of conv_buffer in frames. - * dev_rate - Sampling rate of device. This is set when dev_stream is - * created. - * is_running - For input stream, it should be set to true after it is added - * into device. For output stream, it should be set to true - * just before its first fetch to avoid affecting other existing - * streams. - */ -struct dev_stream { - unsigned int dev_id; - struct cras_rstream *stream; - struct cras_fmt_conv *conv; - struct byte_buffer *conv_buffer; - struct cras_audio_area *conv_area; - unsigned int conv_buffer_size_frames; - size_t dev_rate; - struct dev_stream *prev, *next; - int is_running; -}; - -/* - * Creates a dev_stream. - * - * Args: - * stream - The associated rstream. - * dev_id - Index of the device. - * dev_fmt - The format of the device. - * dev_ptr - A pointer to the device - * cb_ts - A pointer to the initial callback time. - * sleep_interval_ts - A pointer to the initial sleep interval. - * Set to null to calculate the value from device rate and block size. - * Note that we need this argument so that output device sleep interval - * can use input device sleep interval in the beginning to have perfect - * alignment in WebRTC use case. - * Returns the pointer to the created dev_stream. - */ -struct dev_stream *dev_stream_create(struct cras_rstream *stream, - unsigned int dev_id, - const struct cras_audio_format *dev_fmt, - void *dev_ptr, struct timespec *cb_ts, - const struct timespec *sleep_interval_ts); -void dev_stream_destroy(struct dev_stream *dev_stream); - -/* - * Update the estimated sample rate of the device. For multiple active - * devices case, the linear resampler will be configured by the estimated - * rate ration of the main device and the current active device the - * rstream attaches to. - * - * Args: - * dev_stream - The structure holding the stream. - * dev_rate - The sample rate device is using. - * dev_rate_ratio - The ratio of estimated rate and used rate. - * main_rate_ratio - The ratio of estimated rate and used rate of - * main device. - * coarse_rate_adjust - The flag to indicate the direction device - * sample rate should adjust to. - */ -void dev_stream_set_dev_rate(struct dev_stream *dev_stream, - unsigned int dev_rate, double dev_rate_ratio, - double main_rate_ratio, int coarse_rate_adjust); - -/* - * Renders count frames from shm into dst. Updates count if anything is - * written. If it's muted and the only stream zero memory. - * Args: - * dev_stream - The struct holding the stream to mix. - * format - The format of the audio device. - * dst - The destination buffer for mixing. - * num_to_write - The number of frames written. - */ -int dev_stream_mix(struct dev_stream *dev_stream, - const struct cras_audio_format *fmt, uint8_t *dst, - unsigned int num_to_write); - -/* - * Reads froms from the source into the dev_stream. - * Args: - * dev_stream - The struct holding the stream to mix to. - * area - The area to copy audio from. - * area_offset - The offset at which to start reading from area. - * software_gain_scaler - The software gain scaler. - */ -unsigned int dev_stream_capture(struct dev_stream *dev_stream, - const struct cras_audio_area *area, - unsigned int area_offset, - float software_gain_scaler); - -/* Returns the number of iodevs this stream has attached to. */ -int dev_stream_attached_devs(const struct dev_stream *dev_stream); - -/* Updates the number of queued frames in dev_stream. */ -void dev_stream_update_frames(const struct dev_stream *dev_stream); - -/* - * Returns the number of playback frames queued in shared memory. This is a - * post-format-conversion number. If the stream is 24k with 10 frames queued - * and the device is playing at 48k, 20 will be returned. - */ -int dev_stream_playback_frames(const struct dev_stream *dev_stream); - -/* - * Returns the number of frames free to be written to in a capture stream. This - * number is also post format conversion, similar to playback_frames above. - */ -unsigned int dev_stream_capture_avail(const struct dev_stream *dev_stream); - -/* - * Returns the callback threshold, if necesary converted from a stream frame - * count to a device frame count. - */ -unsigned int dev_stream_cb_threshold(const struct dev_stream *dev_stream); - -/* Update next callback time for the stream. */ -void dev_stream_update_next_wake_time(struct dev_stream *dev_stream); - -/* - * If enough samples have been captured, post them to the client. - * TODO(dgreid) - see if this function can be eliminated. - */ -int dev_stream_capture_update_rstream(struct dev_stream *dev_stream); - -/* Updates the read buffer pointers for the stream. */ -int dev_stream_playback_update_rstream(struct dev_stream *dev_stream); - -/* Fill ts with the time the playback sample will be played. */ -void cras_set_playback_timestamp(size_t frame_rate, size_t frames, - struct cras_timespec *ts); - -/* Fill ts with the time the capture sample was recorded. */ -void cras_set_capture_timestamp(size_t frame_rate, size_t frames, - struct cras_timespec *ts); - -/* Fill shm ts with the time the playback sample will be played or the capture - * sample was captured depending on the direction of the stream. - * Args: - * delay_frames - The delay reproted by the device, in frames at the device's - * sample rate. - */ -void dev_stream_set_delay(const struct dev_stream *dev_stream, - unsigned int delay_frames); - -/* Ask the client for cb_threshold samples of audio to play. */ -int dev_stream_request_playback_samples(struct dev_stream *dev_stream, - const struct timespec *now); - -/* - * Gets the wake up time for a dev_stream. - * For an input stream, it considers both needed samples and proper time - * interval between each callbacks. - * Args: - * dev_stream[in]: The dev_stream to check wake up time. - * curr_level[in]: The current level of device. - * level_tstamp[in]: The time stamp when getting current level of device. - * cap_limit[in]: The number of frames that can be captured across all - * streams. - * is_cap_limit_stream[in]: 1 if this stream is causing cap_limit. - * wake_time_out[out]: A timespec for wake up time. - * Returns: - * 0 on success; negative error code on failure. - * A positive value if there is no need to set wake up time for this stream. - */ -int dev_stream_wake_time(struct dev_stream *dev_stream, unsigned int curr_level, - struct timespec *level_tstamp, unsigned int cap_limit, - int is_cap_limit_stream, - struct timespec *wake_time_out); - -/* - * Returns a non-negative fd if the fd is expecting a message and should be - * added to the list of descriptors to poll. - */ -int dev_stream_poll_stream_fd(const struct dev_stream *dev_stream); - -static inline int dev_stream_is_running(struct dev_stream *dev_stream) -{ - return dev_stream->is_running; -} - -static inline void dev_stream_set_running(struct dev_stream *dev_stream) -{ - dev_stream->is_running = 1; -} - -static inline const struct timespec * -dev_stream_next_cb_ts(const struct dev_stream *dev_stream) -{ - if (dev_stream->stream->flags & USE_DEV_TIMING) - return NULL; - - return &dev_stream->stream->next_cb_ts; -} - -static inline const struct timespec * -dev_stream_sleep_interval_ts(struct dev_stream *dev_stream) -{ - return &dev_stream->stream->sleep_interval_ts; -} - -int dev_stream_is_pending_reply(const struct dev_stream *dev_stream); - -/* - * Reads any pending audio message from the socket. - */ -int dev_stream_flush_old_audio_messages(struct dev_stream *dev_stream); - -#endif /* DEV_STREAM_H_ */ |