176 lines
5.8 KiB
C
176 lines
5.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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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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#ifndef __COMPRESS_OFFLOAD_H
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#define __COMPRESS_OFFLOAD_H
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#include <linux/types.h>
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#include <sound/asound.h>
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#include <sound/compress_params.h>
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#define SNDRV_COMPRESS_VERSION SNDRV_PROTOCOL_VERSION(0, 2, 0)
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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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__u32 fragment_size;
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__u32 fragments;
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} __attribute__((packed, aligned(4)));
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/**
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* struct snd_compr_params - compressed stream params
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* @buffer: buffer description
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* @codec: codec parameters
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* @no_wake_mode: dont wake on fragment elapsed
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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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__u8 no_wake_mode;
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} __attribute__((packed, aligned(4)));
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/**
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* struct snd_compr_tstamp - timestamp descriptor
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* @byte_offset: Byte offset in ring buffer to DSP
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* @copied_total: Total number of bytes copied from/to ring buffer to/by DSP
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* @pcm_frames: Frames decoded or encoded by DSP. This field will evolve by
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* large steps and should only be used to monitor encoding/decoding
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* progress. It shall not be used for timing estimates.
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* @pcm_io_frames: Frames rendered or received by DSP into a mixer or an audio
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* output/input. This field should be used for A/V sync or time estimates.
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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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__u32 byte_offset;
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__u32 copied_total;
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__u32 pcm_frames;
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__u32 pcm_io_frames;
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__u32 sampling_rate;
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} __attribute__((packed, aligned(4)));
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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 information
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*/
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struct snd_compr_avail {
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__u64 avail;
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struct snd_compr_tstamp tstamp;
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} __attribute__((packed, aligned(4)));
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enum snd_compr_direction {
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SND_COMPRESS_PLAYBACK = 0,
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SND_COMPRESS_CAPTURE
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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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* @direction: direction supported. Of type snd_compr_direction
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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 direction;
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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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} __attribute__((packed, aligned(4)));
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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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} __attribute__((packed, aligned(4)));
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/**
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* enum sndrv_compress_encoder - encoder metadata key
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* @SNDRV_COMPRESS_ENCODER_PADDING: no of samples appended by the encoder at the
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* end of the track
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* @SNDRV_COMPRESS_ENCODER_DELAY: no of samples inserted by the encoder at the
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* beginning of the track
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*/
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enum sndrv_compress_encoder {
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SNDRV_COMPRESS_ENCODER_PADDING = 1,
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SNDRV_COMPRESS_ENCODER_DELAY = 2,
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};
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/**
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* struct snd_compr_metadata - compressed stream metadata
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* @key: key id
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* @value: key value
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*/
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struct snd_compr_metadata {
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__u32 key;
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__u32 value[8];
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} __attribute__((packed, aligned(4)));
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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 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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* SNDRV_COMPRESS_IOCTL_VERSION: Query the API version
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*/
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#define SNDRV_COMPRESS_IOCTL_VERSION _IOR('C', 0x00, int)
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#define SNDRV_COMPRESS_GET_CAPS _IOWR('C', 0x10, struct snd_compr_caps)
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#define SNDRV_COMPRESS_GET_CODEC_CAPS _IOWR('C', 0x11,\
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struct snd_compr_codec_caps)
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#define SNDRV_COMPRESS_SET_PARAMS _IOW('C', 0x12, struct snd_compr_params)
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#define SNDRV_COMPRESS_GET_PARAMS _IOR('C', 0x13, struct snd_codec)
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#define SNDRV_COMPRESS_SET_METADATA _IOW('C', 0x14,\
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struct snd_compr_metadata)
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#define SNDRV_COMPRESS_GET_METADATA _IOWR('C', 0x15,\
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struct snd_compr_metadata)
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#define SNDRV_COMPRESS_TSTAMP _IOR('C', 0x20, struct snd_compr_tstamp)
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#define SNDRV_COMPRESS_AVAIL _IOR('C', 0x21, struct snd_compr_avail)
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#define SNDRV_COMPRESS_PAUSE _IO('C', 0x30)
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#define SNDRV_COMPRESS_RESUME _IO('C', 0x31)
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#define SNDRV_COMPRESS_START _IO('C', 0x32)
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#define SNDRV_COMPRESS_STOP _IO('C', 0x33)
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#define SNDRV_COMPRESS_DRAIN _IO('C', 0x34)
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#define SNDRV_COMPRESS_NEXT_TRACK _IO('C', 0x35)
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#define SNDRV_COMPRESS_PARTIAL_DRAIN _IO('C', 0x36)
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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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#define SND_COMPR_TRIGGER_NEXT_TRACK 8
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#define SND_COMPR_TRIGGER_PARTIAL_DRAIN 9
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#endif
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