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- /*
- Copyright (c) 2012, Broadcom Europe Ltd
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- * Neither the name of the copyright holder nor the
- names of its contributors may be used to endorse or promote products
- derived from this software without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- #ifndef MMAL_PARAMETERS_AUDIO_H
- #define MMAL_PARAMETERS_AUDIO_H
-
- #include "mmal_parameters_common.h"
-
- /*************************************************
- * ALWAYS ADD NEW ENUMS AT THE END OF THIS LIST! *
- ************************************************/
-
- /** Audio-specific MMAL parameter IDs.
- * @ingroup MMAL_PARAMETER_IDS
- */
- enum
- {
- MMAL_PARAMETER_AUDIO_DESTINATION /**< Takes a MMAL_PARAMETER_STRING_T */
- = MMAL_PARAMETER_GROUP_AUDIO,
- MMAL_PARAMETER_AUDIO_LATENCY_TARGET, /**< Takes a MMAL_PARAMETER_AUDIO_LATENCY_TARGET_T */
- MMAL_PARAMETER_AUDIO_SOURCE,
- MMAL_PARAMETER_AUDIO_PASSTHROUGH, /**< Takes a MMAL_PARAMETER_BOOLEAN_T */
- };
-
- /** Audio latency target to maintain.
- * These settings are used to adjust the clock speed in order
- * to match the measured audio latency to a specified value. */
- typedef struct MMAL_PARAMETER_AUDIO_LATENCY_TARGET_T
- {
- MMAL_PARAMETER_HEADER_T hdr;
-
- MMAL_BOOL_T enable; /**< whether this mode is enabled */
- uint32_t filter; /**< number of latency samples to filter on, good value: 1 */
- uint32_t target; /**< target latency (microseconds) */
- uint32_t shift; /**< shift for storing latency values, good value: 7 */
- int32_t speed_factor; /**< multiplier for speed changes, in 24.8 format, good value: 256-512 */
- int32_t inter_factor; /**< divider for comparing latency versus gradiant, good value: 300 */
- int32_t adj_cap; /**< limit for speed change before nSpeedFactor is applied, good value: 100 */
- } MMAL_PARAMETER_AUDIO_LATENCY_TARGET_T;
-
- #endif /* MMAL_PARAMETERS_AUDIO_H */
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