8664b25449
The timestamp would be used by applications for AVSYNC purpose. Change-Id: I416c38e82fbd51b58df119c0122bcd629ccd88fd Signed-off-by: Asish Bhattacharya <asishb@codeaurora.org>
139 lines
4.6 KiB
C
139 lines
4.6 KiB
C
/*
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* compress_offload.h - compress offload header definations
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*
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* Copyright (C) 2011 Intel Corporation
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* Authors: Vinod Koul <vinod.koul@linux.intel.com>
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* Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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*/
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#ifndef __COMPRESS_OFFLOAD_H
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#define __COMPRESS_OFFLOAD_H
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#include <linux/types.h>
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/**
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* struct snd_compressed_buffer:compressed buffer
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* @fragment_size: size of buffer fragment in bytes
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* @fragments: number of such fragments
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*/
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struct snd_compressed_buffer {
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size_t fragment_size;
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int fragments;
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};
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/* */
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struct snd_compr_params {
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struct snd_compressed_buffer buffer;
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struct snd_codec codec;
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};
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/**
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* struct snd_compr_tstamp: timestamp descriptor
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* @copied_bytes: Number of bytes offset in ring buffer to DSP
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* @copied_total: Total number of bytes copied from ring buffer to DSP
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* @decoded: Frames decoded by DSP
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* @rendered: Frames rendered by DSP into a mixer or an audio output
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* @sampling_rate: sampling rate of audio
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*/
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struct snd_compr_tstamp {
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size_t copied_bytes;
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size_t copied_total;
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size_t decoded;
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size_t rendered;
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__u32 sampling_rate;
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uint64_t timestamp;
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};
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/**
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* struct snd_compr_avail: avail descriptor
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* @avail: Number of bytes available in ring buffer for writing/reading
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* @tstamp: timestamp infomation
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*/
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struct snd_compr_avail {
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size_t avail;
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struct snd_compr_tstamp tstamp;
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};
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/**
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* struct snd_compr_caps: caps descriptor
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* @codecs: pointer to array of codecs
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* @min_fragment_size: minimum fragment supported by DSP
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* @max_fragment_size: maximum fragment supported by DSP
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* @min_fragments: min fragments supported by DSP
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* @max_fragments: max fragments supported by DSP
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* @num_codecs: number of codecs supported
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* @reserved: reserved field
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*/
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struct snd_compr_caps {
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__u32 num_codecs;
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__u32 min_fragment_size;
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__u32 max_fragment_size;
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__u32 min_fragments;
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__u32 max_fragments;
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__u32 codecs[MAX_NUM_CODECS];
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__u32 reserved[11];
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};
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/**
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* struct snd_compr_codec_caps: query capability of codec
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* @codec: codec for which capability is queried
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* @num_descriptors: number of codec descriptors
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* @descriptor: array of codec capability descriptor
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*/
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struct snd_compr_codec_caps {
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__u32 codec;
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__u32 num_descriptors;
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struct snd_codec_desc descriptor[MAX_NUM_CODEC_DESCRIPTORS];
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};
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/**
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* compress path ioctl definitions
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* SNDRV_COMPRESS_GET_CAPS: Query capability of DSP
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* SNDRV_COMPRESS_GET_CODEC_CAPS: Query capability of a codec
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* SNDRV_COMPRESS_SET_PARAMS: Set codec and stream parameters
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* Note: only codec params can be changed runtime and stream params cant be
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* SNDRV_COMPRESS_GET_PARAMS: Query codec and stream params
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* SNDRV_COMPRESS_TSTAMP: get the current timestamp value
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* SNDRV_COMPRESS_AVAIL: get the current buffer avail value.
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* This also queries the tstamp properties
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* SNDRV_COMPRESS_PAUSE: Pause the running stream
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* SNDRV_COMPRESS_RESUME: resume a paused stream
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* SNDRV_COMPRESS_START: Start a stream
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* SNDRV_COMPRESS_STOP: stop a running stream, discarding ring buffer content
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* and the buffers currently with DSP
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* SNDRV_COMPRESS_DRAIN: Play till end of buffers and stop after that
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*/
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#define SNDRV_COMPRESS_GET_CAPS _IOWR('C', 0x00, struct snd_compr_caps *)
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#define SNDRV_COMPRESS_GET_CODEC_CAPS _IOWR('C', 0x01, struct snd_compr_codec_caps *)
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#define SNDRV_COMPRESS_SET_PARAMS _IOW('C', 0x02, struct snd_compr_params *)
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#define SNDRV_COMPRESS_GET_PARAMS _IOR('C', 0x03, struct snd_compr_params *)
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#define SNDRV_COMPRESS_TSTAMP _IOR('C', 0x10, struct snd_compr_tstamp *)
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#define SNDRV_COMPRESS_AVAIL _IOR('C', 0x11, struct snd_compr_avail *)
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#define SNDRV_COMPRESS_PAUSE _IO('C', 0x20)
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#define SNDRV_COMPRESS_RESUME _IO('C', 0x21)
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#define SNDRV_COMPRESS_START _IO('C', 0x22)
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#define SNDRV_COMPRESS_STOP _IO('C', 0x23)
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#define SNDRV_COMPRESS_DRAIN _IO('C', 0x24)
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/*
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* TODO
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* 1. add mmap support
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*
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*/
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#define SND_COMPR_TRIGGER_DRAIN 7 /*FIXME move this to pcm.h */
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#endif
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