--- /dev/null
+/* 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>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ */
+#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, 1, 2)
+/**
+ * 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
+ * @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
projects / cross.git / blobdiff