158 void cras_audio_shm_destroy(struct cras_audio_shm *shm);
162 cras_shm_get_checked_buffer_offset(const struct cras_audio_shm *shm,  in cras_shm_get_checked_buffer_offset()  argument
165 	unsigned buffer_offset = shm->header->buffer_offset[buf_idx];  in cras_shm_get_checked_buffer_offset()
168 	return MIN(buffer_offset, shm->samples_info.length);  in cras_shm_get_checked_buffer_offset()
172 static inline uint8_t *cras_shm_buff_for_idx(const struct cras_audio_shm *shm,  in cras_shm_buff_for_idx()  argument
178 	return shm->samples + cras_shm_get_checked_buffer_offset(shm, idx);  in cras_shm_buff_for_idx()
183 cras_shm_get_checked_read_offset(const struct cras_audio_shm *shm,  in cras_shm_get_checked_read_offset()  argument
187 		cras_shm_get_checked_buffer_offset(shm, buf_idx);  in cras_shm_get_checked_read_offset()
188 	unsigned read_offset = shm->header->read_offset[buf_idx];  in cras_shm_get_checked_read_offset()
193 	if (read_offset > shm->config.used_size)  in cras_shm_get_checked_read_offset()
195 	if (buffer_offset + read_offset > shm->samples_info.length)  in cras_shm_get_checked_read_offset()
202 cras_shm_get_checked_write_offset(const struct cras_audio_shm *shm,  in cras_shm_get_checked_write_offset()  argument
205 	unsigned write_offset = shm->header->write_offset[buf_idx];  in cras_shm_get_checked_write_offset()
207 		cras_shm_get_checked_buffer_offset(shm, buf_idx);  in cras_shm_get_checked_write_offset()
212 	write_offset = MIN(write_offset, shm->config.used_size);  in cras_shm_get_checked_write_offset()
216 	if (buffer_offset + write_offset > shm->samples_info.length)  in cras_shm_get_checked_write_offset()
217 		return shm->samples_info.length - buffer_offset;  in cras_shm_get_checked_write_offset()
223 cras_shm_get_curr_read_frames(const struct cras_audio_shm *shm)  in cras_shm_get_curr_read_frames()  argument
225 	unsigned buf_idx = shm->header->read_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_get_curr_read_frames()
228 	read_offset = cras_shm_get_checked_read_offset(shm, buf_idx);  in cras_shm_get_curr_read_frames()
229 	write_offset = cras_shm_get_checked_write_offset(shm, buf_idx);  in cras_shm_get_curr_read_frames()
234 		return (write_offset - read_offset) / shm->config.frame_bytes;  in cras_shm_get_curr_read_frames()
239 cras_shm_get_read_buffer_base(const struct cras_audio_shm *shm)  in cras_shm_get_read_buffer_base()  argument
241 	unsigned i = shm->header->read_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_get_read_buffer_base()
242 	return cras_shm_buff_for_idx(shm, i);  in cras_shm_get_read_buffer_base()
247 cras_shm_get_write_buffer_base(const struct cras_audio_shm *shm)  in cras_shm_get_write_buffer_base()  argument
249 	unsigned i = shm->header->write_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_get_write_buffer_base()
251 	return cras_shm_buff_for_idx(shm, i);  in cras_shm_get_write_buffer_base()
256 cras_shm_get_writeable_frames(const struct cras_audio_shm *shm,  in cras_shm_get_writeable_frames()  argument
259 	unsigned buf_idx = shm->header->write_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_get_writeable_frames()
261 	const unsigned frame_bytes = shm->config.frame_bytes;  in cras_shm_get_writeable_frames()
264 	write_offset = cras_shm_get_checked_write_offset(shm, buf_idx);  in cras_shm_get_writeable_frames()
273 	return cras_shm_buff_for_idx(shm, buf_idx) + write_offset;  in cras_shm_get_writeable_frames()
281 cras_shm_get_readable_frames(const struct cras_audio_shm *shm, size_t offset,  in cras_shm_get_readable_frames()  argument
284 	unsigned buf_idx = shm->header->read_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_get_readable_frames()
289 	read_offset = cras_shm_get_checked_read_offset(shm, buf_idx);  in cras_shm_get_readable_frames()
290 	write_offset = cras_shm_get_checked_write_offset(shm, buf_idx);  in cras_shm_get_readable_frames()
291 	final_offset = read_offset + offset * shm->config.frame_bytes;  in cras_shm_get_readable_frames()
296 		write_offset = cras_shm_get_checked_write_offset(shm, buf_idx);  in cras_shm_get_readable_frames()
303 	*frames = (write_offset - final_offset) / shm->config.frame_bytes;  in cras_shm_get_readable_frames()
304 	return cras_shm_buff_for_idx(shm, buf_idx) + final_offset;  in cras_shm_get_readable_frames()
308 static inline size_t cras_shm_get_bytes_queued(const struct cras_audio_shm *shm)  in cras_shm_get_bytes_queued()  argument
311 	const unsigned used_size = shm->config.used_size;  in cras_shm_get_bytes_queued()
317 		read_offset = MIN(shm->header->read_offset[i], used_size);  in cras_shm_get_bytes_queued()
318 		write_offset = MIN(shm->header->write_offset[i], used_size);  in cras_shm_get_bytes_queued()
327 static inline int cras_shm_get_frames(const struct cras_audio_shm *shm)  in cras_shm_get_frames()  argument
331 	bytes = cras_shm_get_bytes_queued(shm);  in cras_shm_get_frames()
332 	if (bytes % shm->config.frame_bytes != 0)  in cras_shm_get_frames()
334 	return bytes / shm->config.frame_bytes;  in cras_shm_get_frames()
339 cras_shm_get_frames_in_curr_buffer(const struct cras_audio_shm *shm)  in cras_shm_get_frames_in_curr_buffer()  argument
341 	size_t buf_idx = shm->header->read_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_get_frames_in_curr_buffer()
343 	const unsigned used_size = shm->config.used_size;  in cras_shm_get_frames_in_curr_buffer()
345 	read_offset = MIN(shm->header->read_offset[buf_idx], used_size);  in cras_shm_get_frames_in_curr_buffer()
346 	write_offset = MIN(shm->header->write_offset[buf_idx], used_size);  in cras_shm_get_frames_in_curr_buffer()
351 	return (write_offset - read_offset) / shm->config.frame_bytes;  in cras_shm_get_frames_in_curr_buffer()
355 static inline int cras_shm_is_buffer_available(const struct cras_audio_shm *shm)  in cras_shm_is_buffer_available()  argument
357 	size_t buf_idx = shm->header->write_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_is_buffer_available()
359 	return (shm->header->write_offset[buf_idx] == 0);  in cras_shm_is_buffer_available()
364 cras_shm_get_num_writeable(const struct cras_audio_shm *shm)  in cras_shm_get_num_writeable()  argument
367 	if (!cras_shm_is_buffer_available(shm))  in cras_shm_get_num_writeable()
370 	return shm->config.used_size / shm->config.frame_bytes;  in cras_shm_get_num_writeable()
375 static inline int cras_shm_check_write_overrun(struct cras_audio_shm *shm)  in cras_shm_check_write_overrun()  argument
379 		shm->header->write_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_check_write_overrun()
381 	if (!shm->header->write_in_progress[write_buf_idx]) {  in cras_shm_check_write_overrun()
382 		unsigned int used_size = shm->config.used_size;  in cras_shm_check_write_overrun()
384 		if (shm->header->write_offset[write_buf_idx]) {  in cras_shm_check_write_overrun()
385 			shm->header->num_overruns++; /* Will over-write unread */  in cras_shm_check_write_overrun()
389 		memset(cras_shm_buff_for_idx(shm, write_buf_idx), 0, used_size);  in cras_shm_check_write_overrun()
391 		shm->header->write_in_progress[write_buf_idx] = 1;  in cras_shm_check_write_overrun()
392 		shm->header->write_offset[write_buf_idx] = 0;  in cras_shm_check_write_overrun()
398 static inline void cras_shm_buffer_written(struct cras_audio_shm *shm,  in cras_shm_buffer_written()  argument
401 	size_t buf_idx = shm->header->write_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_buffer_written()
406 	shm->header->write_offset[buf_idx] += frames * shm->config.frame_bytes;  in cras_shm_buffer_written()
407 	shm->header->read_offset[buf_idx] = 0;  in cras_shm_buffer_written()
412 cras_shm_frames_written(const struct cras_audio_shm *shm)  in cras_shm_frames_written()  argument
414 	size_t buf_idx = shm->header->write_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_frames_written()
416 	return shm->header->write_offset[buf_idx] / shm->config.frame_bytes;  in cras_shm_frames_written()
420 static inline void cras_shm_buffer_write_complete(struct cras_audio_shm *shm)  in cras_shm_buffer_write_complete()  argument
422 	size_t buf_idx = shm->header->write_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_buffer_write_complete()
424 	shm->header->write_in_progress[buf_idx] = 0;  in cras_shm_buffer_write_complete()
428 	shm->header->write_buf_idx = buf_idx;  in cras_shm_buffer_write_complete()
432 static inline void cras_shm_buffer_written_start(struct cras_audio_shm *shm,  in cras_shm_buffer_written_start()  argument
435 	size_t buf_idx = shm->header->write_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_buffer_written_start()
437 	shm->header->write_offset[buf_idx] = frames * shm->config.frame_bytes;  in cras_shm_buffer_written_start()
438 	shm->header->read_offset[buf_idx] = 0;  in cras_shm_buffer_written_start()
439 	cras_shm_buffer_write_complete(shm);  in cras_shm_buffer_written_start()
444 static inline void cras_shm_buffer_read(struct cras_audio_shm *shm,  in cras_shm_buffer_read()  argument
447 	size_t buf_idx = shm->header->read_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_buffer_read()
449 	struct cras_audio_shm_header *header = shm->header;  in cras_shm_buffer_read()
450 	struct cras_audio_shm_config *config = &shm->config;  in cras_shm_buffer_read()
476 static inline void cras_shm_buffer_read_current(struct cras_audio_shm *shm,  in cras_shm_buffer_read_current()  argument
479 	size_t buf_idx = shm->header->read_buf_idx & CRAS_SHM_BUFFERS_MASK;  in cras_shm_buffer_read_current()
480 	struct cras_audio_shm_header *header = shm->header;  in cras_shm_buffer_read_current()
481 	struct cras_audio_shm_config *config = &shm->config;  in cras_shm_buffer_read_current()
494 static inline void cras_shm_set_volume_scaler(struct cras_audio_shm *shm,  in cras_shm_set_volume_scaler()  argument
498 	shm->header->volume_scaler = MIN(volume_scaler, 1.0);  in cras_shm_set_volume_scaler()
502 static inline float cras_shm_get_volume_scaler(const struct cras_audio_shm *shm)  in cras_shm_get_volume_scaler()  argument
504 	return shm->header->volume_scaler;  in cras_shm_get_volume_scaler()
508 static inline void cras_shm_set_mute(struct cras_audio_shm *shm, size_t mute)  in cras_shm_set_mute()  argument
510 	shm->header->mute = !!mute;  in cras_shm_set_mute()
514 static inline size_t cras_shm_get_mute(const struct cras_audio_shm *shm)  in cras_shm_get_mute()  argument
516 	return shm->header->mute;  in cras_shm_get_mute()
520 static inline void cras_shm_set_frame_bytes(struct cras_audio_shm *shm,  in cras_shm_set_frame_bytes()  argument
523 	shm->config.frame_bytes = frame_bytes;  in cras_shm_set_frame_bytes()
524 	if (shm->header)  in cras_shm_set_frame_bytes()
525 		shm->header->config.frame_bytes = frame_bytes;  in cras_shm_set_frame_bytes()
529 static inline unsigned cras_shm_frame_bytes(const struct cras_audio_shm *shm)  in cras_shm_frame_bytes()  argument
531 	return shm->config.frame_bytes;  in cras_shm_frame_bytes()
535 static inline void cras_shm_set_callback_pending(struct cras_audio_shm *shm,  in cras_shm_set_callback_pending()  argument
538 	shm->header->callback_pending = !!pending;  in cras_shm_set_callback_pending()
542 static inline int cras_shm_callback_pending(const struct cras_audio_shm *shm)  in cras_shm_callback_pending()  argument
544 	return shm->header->callback_pending;  in cras_shm_callback_pending()
548 static inline void cras_shm_set_buffer_offset(struct cras_audio_shm *shm,  in cras_shm_set_buffer_offset()  argument
551 	shm->header->buffer_offset[buf_idx] = offset;  in cras_shm_set_buffer_offset()
559 static inline void cras_shm_set_used_size(struct cras_audio_shm *shm,  in cras_shm_set_used_size()  argument
564 	shm->config.used_size = used_size;  in cras_shm_set_used_size()
565 	if (shm->header)  in cras_shm_set_used_size()
566 		shm->header->config.used_size = used_size;  in cras_shm_set_used_size()
569 		cras_shm_set_buffer_offset(shm, i, i * used_size);  in cras_shm_set_used_size()
573 static inline unsigned cras_shm_used_size(const struct cras_audio_shm *shm)  in cras_shm_used_size()  argument
575 	return shm->config.used_size;  in cras_shm_used_size()
579 static inline unsigned cras_shm_used_frames(const struct cras_audio_shm *shm)  in cras_shm_used_frames()  argument
581 	return shm->config.used_size / shm->config.frame_bytes;  in cras_shm_used_frames()
585 static inline unsigned cras_shm_samples_size(const struct cras_audio_shm *shm)  in cras_shm_samples_size()  argument
587 	return shm->samples_info.length;  in cras_shm_samples_size()
591 static inline unsigned cras_shm_num_overruns(const struct cras_audio_shm *shm)  in cras_shm_num_overruns()  argument
593 	return shm->header->num_overruns;  in cras_shm_num_overruns()
599 static inline void cras_shm_copy_shared_config(struct cras_audio_shm *shm)  in cras_shm_copy_shared_config()  argument
601 	memcpy(&shm->config, &shm->header->config, sizeof(shm->config));  in cras_shm_copy_shared_config()