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/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) AND MIT) */
* compress_params.h - codec types and parameters for compressed data
* streaming interface
* Copyright (C) 2011 Intel Corporation
* Authors: Pierre-Louis Bossart <>
* Vinod Koul <>
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* The definitions in this file are derived from the OpenMAX AL version 1.1
* and OpenMAX IL v 1.1.2 header files which contain the copyright notice below
* and are licensed under the MIT license.
* Copyright (c) 2007-2010 The Khronos Group Inc.
#include <linux/types.h>
#define MAX_NUM_CODECS 32
/* Codecs are listed linearly to allow for extensibility */
#define SND_AUDIOCODEC_PCM ((__u32) 0x00000001)
#define SND_AUDIOCODEC_MP3 ((__u32) 0x00000002)
#define SND_AUDIOCODEC_AMR ((__u32) 0x00000003)
#define SND_AUDIOCODEC_AMRWB ((__u32) 0x00000004)
#define SND_AUDIOCODEC_AMRWBPLUS ((__u32) 0x00000005)
#define SND_AUDIOCODEC_AAC ((__u32) 0x00000006)
#define SND_AUDIOCODEC_WMA ((__u32) 0x00000007)
#define SND_AUDIOCODEC_REAL ((__u32) 0x00000008)
#define SND_AUDIOCODEC_VORBIS ((__u32) 0x00000009)
#define SND_AUDIOCODEC_FLAC ((__u32) 0x0000000A)
#define SND_AUDIOCODEC_IEC61937 ((__u32) 0x0000000B)
#define SND_AUDIOCODEC_G723_1 ((__u32) 0x0000000C)
#define SND_AUDIOCODEC_G729 ((__u32) 0x0000000D)
#define SND_AUDIOCODEC_BESPOKE ((__u32) 0x0000000E)
#define SND_AUDIOCODEC_ALAC ((__u32) 0x0000000F)
#define SND_AUDIOCODEC_APE ((__u32) 0x00000010)
* Profile and modes are listed with bit masks. This allows for a
* more compact representation of fields that will not evolve
* (in contrast to the list of codecs)
#define SND_AUDIOPROFILE_PCM ((__u32) 0x00000001)
/* MP3 modes are only useful for encoders */
#define SND_AUDIOCHANMODE_MP3_MONO ((__u32) 0x00000001)
#define SND_AUDIOCHANMODE_MP3_STEREO ((__u32) 0x00000002)
#define SND_AUDIOCHANMODE_MP3_JOINTSTEREO ((__u32) 0x00000004)
#define SND_AUDIOCHANMODE_MP3_DUAL ((__u32) 0x00000008)
#define SND_AUDIOPROFILE_AMR ((__u32) 0x00000001)
/* AMR modes are only useful for encoders */
#define SND_AUDIOMODE_AMR_DTX_OFF ((__u32) 0x00000001)
#define SND_AUDIOMODE_AMR_VAD1 ((__u32) 0x00000002)
#define SND_AUDIOMODE_AMR_VAD2 ((__u32) 0x00000004)
#define SND_AUDIOSTREAMFORMAT_UNDEFINED ((__u32) 0x00000000)
#define SND_AUDIOSTREAMFORMAT_CONFORMANCE ((__u32) 0x00000001)
#define SND_AUDIOSTREAMFORMAT_IF1 ((__u32) 0x00000002)
#define SND_AUDIOSTREAMFORMAT_IF2 ((__u32) 0x00000004)
#define SND_AUDIOSTREAMFORMAT_FSF ((__u32) 0x00000008)
#define SND_AUDIOSTREAMFORMAT_RTPPAYLOAD ((__u32) 0x00000010)
#define SND_AUDIOSTREAMFORMAT_ITU ((__u32) 0x00000020)
#define SND_AUDIOPROFILE_AMRWB ((__u32) 0x00000001)
/* AMRWB modes are only useful for encoders */
#define SND_AUDIOMODE_AMRWB_DTX_OFF ((__u32) 0x00000001)
#define SND_AUDIOMODE_AMRWB_VAD1 ((__u32) 0x00000002)
#define SND_AUDIOMODE_AMRWB_VAD2 ((__u32) 0x00000004)
#define SND_AUDIOPROFILE_AMRWBPLUS ((__u32) 0x00000001)
#define SND_AUDIOPROFILE_AAC ((__u32) 0x00000001)
/* AAC modes are required for encoders and decoders */
#define SND_AUDIOMODE_AAC_MAIN ((__u32) 0x00000001)
#define SND_AUDIOMODE_AAC_LC ((__u32) 0x00000002)
#define SND_AUDIOMODE_AAC_SSR ((__u32) 0x00000004)
#define SND_AUDIOMODE_AAC_LTP ((__u32) 0x00000008)
#define SND_AUDIOMODE_AAC_HE ((__u32) 0x00000010)
#define SND_AUDIOMODE_AAC_SCALABLE ((__u32) 0x00000020)
#define SND_AUDIOMODE_AAC_ERLC ((__u32) 0x00000040)
#define SND_AUDIOMODE_AAC_LD ((__u32) 0x00000080)
#define SND_AUDIOMODE_AAC_HE_PS ((__u32) 0x00000100)
#define SND_AUDIOMODE_AAC_HE_MPS ((__u32) 0x00000200)
/* AAC formats are required for encoders and decoders */
#define SND_AUDIOSTREAMFORMAT_MP2ADTS ((__u32) 0x00000001)
#define SND_AUDIOSTREAMFORMAT_MP4ADTS ((__u32) 0x00000002)
#define SND_AUDIOSTREAMFORMAT_MP4LOAS ((__u32) 0x00000004)
#define SND_AUDIOSTREAMFORMAT_MP4LATM ((__u32) 0x00000008)
#define SND_AUDIOSTREAMFORMAT_ADIF ((__u32) 0x00000010)
#define SND_AUDIOSTREAMFORMAT_MP4FF ((__u32) 0x00000020)
#define SND_AUDIOSTREAMFORMAT_RAW ((__u32) 0x00000040)
#define SND_AUDIOPROFILE_WMA7 ((__u32) 0x00000001)
#define SND_AUDIOPROFILE_WMA8 ((__u32) 0x00000002)
#define SND_AUDIOPROFILE_WMA9 ((__u32) 0x00000004)
#define SND_AUDIOPROFILE_WMA10 ((__u32) 0x00000008)
#define SND_AUDIOPROFILE_WMA9_PRO ((__u32) 0x00000010)
#define SND_AUDIOPROFILE_WMA9_LOSSLESS ((__u32) 0x00000020)
#define SND_AUDIOPROFILE_WMA10_LOSSLESS ((__u32) 0x00000040)
#define SND_AUDIOMODE_WMA_LEVEL1 ((__u32) 0x00000001)
#define SND_AUDIOMODE_WMA_LEVEL2 ((__u32) 0x00000002)
#define SND_AUDIOMODE_WMA_LEVEL3 ((__u32) 0x00000004)
#define SND_AUDIOMODE_WMA_LEVEL4 ((__u32) 0x00000008)
#define SND_AUDIOMODE_WMAPRO_LEVELM0 ((__u32) 0x00000010)
#define SND_AUDIOMODE_WMAPRO_LEVELM1 ((__u32) 0x00000020)
#define SND_AUDIOMODE_WMAPRO_LEVELM2 ((__u32) 0x00000040)
#define SND_AUDIOMODE_WMAPRO_LEVELM3 ((__u32) 0x00000080)
#define SND_AUDIOSTREAMFORMAT_WMA_ASF ((__u32) 0x00000001)
* Some implementations strip the ASF header and only send ASF packets
* to the DSP
#define SND_AUDIOSTREAMFORMAT_WMA_NOASF_HDR ((__u32) 0x00000002)
#define SND_AUDIOPROFILE_REALAUDIO ((__u32) 0x00000001)
#define SND_AUDIOMODE_REALAUDIO_G2 ((__u32) 0x00000001)
#define SND_AUDIOMODE_REALAUDIO_8 ((__u32) 0x00000002)
#define SND_AUDIOMODE_REALAUDIO_10 ((__u32) 0x00000004)
#define SND_AUDIOMODE_REALAUDIO_SURROUND ((__u32) 0x00000008)
#define SND_AUDIOPROFILE_VORBIS ((__u32) 0x00000001)
#define SND_AUDIOMODE_VORBIS ((__u32) 0x00000001)
#define SND_AUDIOPROFILE_FLAC ((__u32) 0x00000001)
* Define quality levels for FLAC encoders, from LEVEL0 (fast)
* to LEVEL8 (best)
#define SND_AUDIOMODE_FLAC_LEVEL0 ((__u32) 0x00000001)
#define SND_AUDIOMODE_FLAC_LEVEL1 ((__u32) 0x00000002)
#define SND_AUDIOMODE_FLAC_LEVEL2 ((__u32) 0x00000004)
#define SND_AUDIOMODE_FLAC_LEVEL3 ((__u32) 0x00000008)
#define SND_AUDIOMODE_FLAC_LEVEL4 ((__u32) 0x00000010)
#define SND_AUDIOMODE_FLAC_LEVEL5 ((__u32) 0x00000020)
#define SND_AUDIOMODE_FLAC_LEVEL6 ((__u32) 0x00000040)
#define SND_AUDIOMODE_FLAC_LEVEL7 ((__u32) 0x00000080)
#define SND_AUDIOMODE_FLAC_LEVEL8 ((__u32) 0x00000100)
#define SND_AUDIOSTREAMFORMAT_FLAC ((__u32) 0x00000001)
#define SND_AUDIOSTREAMFORMAT_FLAC_OGG ((__u32) 0x00000002)
/* IEC61937 payloads without CUVP and preambles */
#define SND_AUDIOPROFILE_IEC61937 ((__u32) 0x00000001)
/* IEC61937 with S/PDIF preambles+CUVP bits in 32-bit containers */
#define SND_AUDIOPROFILE_IEC61937_SPDIF ((__u32) 0x00000002)
* IEC modes are mandatory for decoders. Format autodetection
* will only happen on the DSP side with mode 0. The PCM mode should
* not be used, the PCM codec should be used instead.
#define SND_AUDIOMODE_IEC_REF_STREAM_HEADER ((__u32) 0x00000000)
#define SND_AUDIOMODE_IEC_LPCM ((__u32) 0x00000001)
#define SND_AUDIOMODE_IEC_AC3 ((__u32) 0x00000002)
#define SND_AUDIOMODE_IEC_MPEG1 ((__u32) 0x00000004)
#define SND_AUDIOMODE_IEC_MP3 ((__u32) 0x00000008)
#define SND_AUDIOMODE_IEC_MPEG2 ((__u32) 0x00000010)
#define SND_AUDIOMODE_IEC_AACLC ((__u32) 0x00000020)
#define SND_AUDIOMODE_IEC_DTS ((__u32) 0x00000040)
#define SND_AUDIOMODE_IEC_ATRAC ((__u32) 0x00000080)
#define SND_AUDIOMODE_IEC_SACD ((__u32) 0x00000100)
#define SND_AUDIOMODE_IEC_EAC3 ((__u32) 0x00000200)
#define SND_AUDIOMODE_IEC_DTS_HD ((__u32) 0x00000400)
#define SND_AUDIOMODE_IEC_MLP ((__u32) 0x00000800)
#define SND_AUDIOMODE_IEC_DST ((__u32) 0x00001000)
#define SND_AUDIOMODE_IEC_WMAPRO ((__u32) 0x00002000)
#define SND_AUDIOMODE_IEC_REF_CXT ((__u32) 0x00004000)
#define SND_AUDIOMODE_IEC_HE_AAC ((__u32) 0x00008000)
#define SND_AUDIOMODE_IEC_HE_AAC2 ((__u32) 0x00010000)
#define SND_AUDIOMODE_IEC_MPEG_SURROUND ((__u32) 0x00020000)
#define SND_AUDIOPROFILE_G723_1 ((__u32) 0x00000001)
#define SND_AUDIOMODE_G723_1_ANNEX_A ((__u32) 0x00000001)
#define SND_AUDIOMODE_G723_1_ANNEX_B ((__u32) 0x00000002)
#define SND_AUDIOMODE_G723_1_ANNEX_C ((__u32) 0x00000004)
#define SND_AUDIOPROFILE_G729 ((__u32) 0x00000001)
#define SND_AUDIOMODE_G729_ANNEX_A ((__u32) 0x00000001)
#define SND_AUDIOMODE_G729_ANNEX_B ((__u32) 0x00000002)
/* <FIXME: multichannel encoders aren't supported for now. Would need
an additional definition of channel arrangement> */
/* VBR/CBR definitions */
/* Encoder options */
struct snd_enc_wma {
__u32 super_block_align; /* WMA Type-specific data */
* struct snd_enc_vorbis - Vorbis encoder parameters
* @quality: Sets encoding quality to n, between -1 (low) and 10 (high).
* In the default mode of operation, the quality level is 3.
* Normal quality range is 0 - 10.
* @managed: Boolean. Set bitrate management mode. This turns off the
* normal VBR encoding, but allows hard or soft bitrate constraints to be
* enforced by the encoder. This mode can be slower, and may also be
* lower quality. It is primarily useful for streaming.
* @max_bit_rate: Enabled only if managed is TRUE
* @min_bit_rate: Enabled only if managed is TRUE
* @downmix: Boolean. Downmix input from stereo to mono (has no effect on
* non-stereo streams). Useful for lower-bitrate encoding.
* These options were extracted from the OpenMAX IL spec and Gstreamer vorbisenc
* properties
* For best quality users should specify VBR mode and set quality levels.
struct snd_enc_vorbis {
__s32 quality;
__u32 managed;
__u32 max_bit_rate;
__u32 min_bit_rate;
__u32 downmix;
} __attribute__((packed, aligned(4)));
* struct snd_enc_real - RealAudio encoder parameters
* @quant_bits: number of coupling quantization bits in the stream
* @start_region: coupling start region in the stream
* @num_regions: number of regions value
* These options were extracted from the OpenMAX IL spec
struct snd_enc_real {
__u32 quant_bits;
__u32 start_region;
__u32 num_regions;
} __attribute__((packed, aligned(4)));
* struct snd_enc_flac - FLAC encoder parameters
* @num: serial number, valid only for OGG formats
* needs to be set by application
* @gain: Add replay gain tags
* These options were extracted from the FLAC online documentation
* at
* To make the API simpler, it is assumed that the user will select quality
* profiles. Additional options that affect encoding quality and speed can
* be added at a later stage if needed.
* By default the Subset format is used by encoders.
* TAGS such as pictures, etc, cannot be handled by an offloaded encoder and are
* not supported in this API.
struct snd_enc_flac {
__u32 num;
__u32 gain;
} __attribute__((packed, aligned(4)));
struct snd_enc_generic {
__u32 bw; /* encoder bandwidth */
__s32 reserved[15]; /* Can be used for SND_AUDIOCODEC_BESPOKE */
} __attribute__((packed, aligned(4)));
struct snd_dec_flac {
__u16 sample_size;
__u16 min_blk_size;
__u16 max_blk_size;
__u16 min_frame_size;
__u16 max_frame_size;
__u16 reserved;
} __attribute__((packed, aligned(4)));
struct snd_dec_wma {
__u32 encoder_option;
__u32 adv_encoder_option;
__u32 adv_encoder_option2;
__u32 reserved;
} __attribute__((packed, aligned(4)));
struct snd_dec_alac {
__u32 frame_length;
__u8 compatible_version;
__u8 pb;
__u8 mb;
__u8 kb;
__u32 max_run;
__u32 max_frame_bytes;
} __attribute__((packed, aligned(4)));
struct snd_dec_ape {
__u16 compatible_version;
__u16 compression_level;
__u32 format_flags;
__u32 blocks_per_frame;
__u32 final_frame_blocks;
__u32 total_frames;
__u32 seek_table_present;
} __attribute__((packed, aligned(4)));
union snd_codec_options {
struct snd_enc_wma wma;
struct snd_enc_vorbis vorbis;
struct snd_enc_real real;
struct snd_enc_flac flac;
struct snd_enc_generic generic;
struct snd_dec_flac flac_d;
struct snd_dec_wma wma_d;
struct snd_dec_alac alac_d;
struct snd_dec_ape ape_d;
} __attribute__((packed, aligned(4)));
/** struct snd_codec_desc - description of codec capabilities
* @max_ch: Maximum number of audio channels
* @sample_rates: Sampling rates in Hz, use values like 48000 for this
* @num_sample_rates: Number of valid values in sample_rates array
* @bit_rate: Indexed array containing supported bit rates
* @num_bitrates: Number of valid values in bit_rate array
* @rate_control: value is specified by SND_RATECONTROLMODE defines.
* @profiles: Supported profiles. See SND_AUDIOPROFILE defines.
* @modes: Supported modes. See SND_AUDIOMODE defines
* @formats: Supported formats. See SND_AUDIOSTREAMFORMAT defines
* @min_buffer: Minimum buffer size handled by codec implementation
* @reserved: reserved for future use
* This structure provides a scalar value for profiles, modes and stream
* format fields.
* If an implementation supports multiple combinations, they will be listed as
* codecs with different descriptors, for example there would be 2 descriptors
* for AAC-RAW and AAC-ADTS.
* This entails some redundancy but makes it easier to avoid invalid
* configurations.
struct snd_codec_desc {
__u32 max_ch;
__u32 sample_rates[MAX_NUM_SAMPLE_RATES];
__u32 num_sample_rates;
__u32 bit_rate[MAX_NUM_BITRATES];
__u32 num_bitrates;
__u32 rate_control;
__u32 profiles;
__u32 modes;
__u32 formats;
__u32 min_buffer;
__u32 reserved[15];
} __attribute__((packed, aligned(4)));
/** struct snd_codec
* @id: Identifies the supported audio encoder/decoder.
* See SND_AUDIOCODEC macros.
* @ch_in: Number of input audio channels
* @ch_out: Number of output channels. In case of contradiction between
* this field and the channelMode field, the channelMode field
* overrides.
* @sample_rate: Audio sample rate of input data in Hz, use values like 48000
* for this.
* @bit_rate: Bitrate of encoded data. May be ignored by decoders
* @rate_control: Encoding rate control. See SND_RATECONTROLMODE defines.
* Encoders may rely on profiles for quality levels.
* May be ignored by decoders.
* @profile: Mandatory for encoders, can be mandatory for specific
* decoders as well. See SND_AUDIOPROFILE defines.
* @level: Supported level (Only used by WMA at the moment)
* @ch_mode: Channel mode for encoder. See SND_AUDIOCHANMODE defines
* @format: Format of encoded bistream. Mandatory when defined.
* @align: Block alignment in bytes of an audio sample.
* Only required for PCM or IEC formats.
* @options: encoder-specific settings
* @reserved: reserved for future use
struct snd_codec {
__u32 id;
__u32 ch_in;
__u32 ch_out;
__u32 sample_rate;
__u32 bit_rate;
__u32 rate_control;
__u32 profile;
__u32 level;
__u32 ch_mode;
__u32 format;
__u32 align;
union snd_codec_options options;
__u32 reserved[3];
} __attribute__((packed, aligned(4)));