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compress_offload.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * compress_offload.h - compress offload header definations * * Copyright (C) 2011 Intel Corporation * Authors: Vinod Koul <vinod.koul@linux.intel.com> * Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> */ #ifndef __COMPRESS_OFFLOAD_H #define __COMPRESS_OFFLOAD_H #include <linux/types.h> #include <sound/asound.h> #include <sound/compress_params.h> #define SNDRV_COMPRESS_VERSION SNDRV_PROTOCOL_VERSION(0, 2, 0) /** * struct snd_compressed_buffer - compressed buffer * @fragment_size: size of buffer fragment in bytes * @fragments: number of such fragments */ struct snd_compressed_buffer { __u32 fragment_size; __u32 fragments; } __attribute__((packed, aligned(4))); /** * struct snd_compr_params - compressed stream params * @buffer: buffer description * @codec: codec parameters * @no_wake_mode: dont wake on fragment elapsed */ struct snd_compr_params { struct snd_compressed_buffer buffer; struct snd_codec codec; __u8 no_wake_mode; } __attribute__((packed, aligned(4))); /** * struct snd_compr_tstamp - timestamp descriptor * @byte_offset: Byte offset in ring buffer to DSP * @copied_total: Total number of bytes copied from/to ring buffer to/by DSP * @pcm_frames: Frames decoded or encoded by DSP. This field will evolve by * large steps and should only be used to monitor encoding/decoding * progress. It shall not be used for timing estimates. * @pcm_io_frames: Frames rendered or received by DSP into a mixer or an audio * output/input. This field should be used for A/V sync or time estimates. * @sampling_rate: sampling rate of audio */ struct snd_compr_tstamp { __u32 byte_offset; __u32 copied_total; __u32 pcm_frames; __u32 pcm_io_frames; __u32 sampling_rate; } __attribute__((packed, aligned(4))); /** * struct snd_compr_avail - avail descriptor * @avail: Number of bytes available in ring buffer for writing/reading * @tstamp: timestamp information */ struct snd_compr_avail { __u64 avail; struct snd_compr_tstamp tstamp; } __attribute__((packed, aligned(4))); enum snd_compr_direction { SND_COMPRESS_PLAYBACK = 0, SND_COMPRESS_CAPTURE }; /** * struct snd_compr_caps - caps descriptor * @codecs: pointer to array of codecs * @direction: direction supported. Of type snd_compr_direction * @min_fragment_size: minimum fragment supported by DSP * @max_fragment_size: maximum fragment supported by DSP * @min_fragments: min fragments supported by DSP * @max_fragments: max fragments supported by DSP * @num_codecs: number of codecs supported * @reserved: reserved field */ struct snd_compr_caps { __u32 num_codecs; __u32 direction; __u32 min_fragment_size; __u32 max_fragment_size; __u32 min_fragments; __u32 max_fragments; __u32 codecs[MAX_NUM_CODECS]; __u32 reserved[11]; } __attribute__((packed, aligned(4))); /** * struct snd_compr_codec_caps - query capability of codec * @codec: codec for which capability is queried * @num_descriptors: number of codec descriptors * @descriptor: array of codec capability descriptor */ struct snd_compr_codec_caps { __u32 codec; __u32 num_descriptors; struct snd_codec_desc descriptor[MAX_NUM_CODEC_DESCRIPTORS]; } __attribute__((packed, aligned(4))); /** * enum sndrv_compress_encoder - encoder metadata key * @SNDRV_COMPRESS_ENCODER_PADDING: no of samples appended by the encoder at the * end of the track * @SNDRV_COMPRESS_ENCODER_DELAY: no of samples inserted by the encoder at the * beginning of the track */ enum sndrv_compress_encoder { SNDRV_COMPRESS_ENCODER_PADDING = 1, SNDRV_COMPRESS_ENCODER_DELAY = 2, }; /** * struct snd_compr_metadata - compressed stream metadata * @key: key id * @value: key value */ struct snd_compr_metadata { __u32 key; __u32 value[8]; } __attribute__((packed, aligned(4))); /* * compress path ioctl definitions * SNDRV_COMPRESS_GET_CAPS: Query capability of DSP * SNDRV_COMPRESS_GET_CODEC_CAPS: Query capability of a codec * SNDRV_COMPRESS_SET_PARAMS: Set codec and stream parameters * Note: only codec params can be changed runtime and stream params cant be * SNDRV_COMPRESS_GET_PARAMS: Query codec params * SNDRV_COMPRESS_TSTAMP: get the current timestamp value * SNDRV_COMPRESS_AVAIL: get the current buffer avail value. * This also queries the tstamp properties * SNDRV_COMPRESS_PAUSE: Pause the running stream * SNDRV_COMPRESS_RESUME: resume a paused stream * SNDRV_COMPRESS_START: Start a stream * SNDRV_COMPRESS_STOP: stop a running stream, discarding ring buffer content * and the buffers currently with DSP * SNDRV_COMPRESS_DRAIN: Play till end of buffers and stop after that * SNDRV_COMPRESS_IOCTL_VERSION: Query the API version */ #define SNDRV_COMPRESS_IOCTL_VERSION _IOR('C', 0x00, int) #define SNDRV_COMPRESS_GET_CAPS _IOWR('C', 0x10, struct snd_compr_caps) #define SNDRV_COMPRESS_GET_CODEC_CAPS _IOWR('C', 0x11,\ struct snd_compr_codec_caps) #define SNDRV_COMPRESS_SET_PARAMS _IOW('C', 0x12, struct snd_compr_params) #define SNDRV_COMPRESS_GET_PARAMS _IOR('C', 0x13, struct snd_codec) #define SNDRV_COMPRESS_SET_METADATA _IOW('C', 0x14,\ struct snd_compr_metadata) #define SNDRV_COMPRESS_GET_METADATA _IOWR('C', 0x15,\ struct snd_compr_metadata) #define SNDRV_COMPRESS_TSTAMP _IOR('C', 0x20, struct snd_compr_tstamp) #define SNDRV_COMPRESS_AVAIL _IOR('C', 0x21, struct snd_compr_avail) #define SNDRV_COMPRESS_PAUSE _IO('C', 0x30) #define SNDRV_COMPRESS_RESUME _IO('C', 0x31) #define SNDRV_COMPRESS_START _IO('C', 0x32) #define SNDRV_COMPRESS_STOP _IO('C', 0x33) #define SNDRV_COMPRESS_DRAIN _IO('C', 0x34) #define SNDRV_COMPRESS_NEXT_TRACK _IO('C', 0x35) #define SNDRV_COMPRESS_PARTIAL_DRAIN _IO('C', 0x36) /* * TODO * 1. add mmap support * */ #define SND_COMPR_TRIGGER_DRAIN 7 /*FIXME move this to pcm.h */ #define SND_COMPR_TRIGGER_NEXT_TRACK 8 #define SND_COMPR_TRIGGER_PARTIAL_DRAIN 9 #endif
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