initial commit

LICENSE

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+MIT License
+
+Copyright (c) 2025 IllusionMan1212
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

alsa.odin

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+#+build linux
+package alsa
+
+import "core:c"
+
+foreign import alsa "system:asound"
+
+pcm_open_flags :: enum i32 {
+    BLOCK = 0x0,
+    NONBLOCK = 0x00000001,
+    ASYNC = 0x00000002,
+}
+
+/** PCM stream (direction) */
+pcm_stream_t :: enum i32 {
+    /** Playback stream */
+    PLAYBACK = 0,
+    /** Capture stream */
+    CAPTURE,
+    LAST = CAPTURE,
+}
+
+/** PCM sample format */
+pcm_format_t :: enum {
+    /** Unknown */
+    UNKNOWN = -1,
+    /** Signed 8 bit */
+    S8 = 0,
+    /** Unsigned 8 bit */
+    U8,
+    /** Signed 16 bit Little Endian */
+    S16_LE,
+    /** Signed 16 bit Big Endian */
+    S16_BE,
+    /** Unsigned 16 bit Little Endian */
+    U16_LE,
+    /** Unsigned 16 bit Big Endian */
+    U16_BE,
+    /** Signed 24 bit Little Endian using low three bytes in 32-bit word */
+    S24_LE,
+    /** Signed 24 bit Big Endian using low three bytes in 32-bit word */
+    S24_BE,
+    /** Unsigned 24 bit Little Endian using low three bytes in 32-bit word */
+    U24_LE,
+    /** Unsigned 24 bit Big Endian using low three bytes in 32-bit word */
+    U24_BE,
+    /** Signed 32 bit Little Endian */
+    S32_LE,
+    /** Signed 32 bit Big Endian */
+    S32_BE,
+    /** Unsigned 32 bit Little Endian */
+    U32_LE,
+    /** Unsigned 32 bit Big Endian */
+    U32_BE,
+    /** Float 32 bit Little Endian, Range -1.0 to 1.0 */
+    FLOAT_LE,
+    /** Float 32 bit Big Endian, Range -1.0 to 1.0 */
+    FLOAT_BE,
+    /** Float 64 bit Little Endian, Range -1.0 to 1.0 */
+    FLOAT64_LE,
+    /** Float 64 bit Big Endian, Range -1.0 to 1.0 */
+    FLOAT64_BE,
+    /** IEC-958 Little Endian */
+    IEC958_SUBFRAME_LE,
+    /** IEC-958 Big Endian */
+    IEC958_SUBFRAME_BE,
+    /** Mu-Law */
+    MU_LAW,
+    /** A-Law */
+    A_LAW,
+    /** Ima-ADPCM */
+    IMA_ADPCM,
+    /** MPEG */
+    MPEG,
+    /** GSM */
+    GSM,
+    /** Signed 20bit Little Endian in 4bytes format, LSB justified */
+    S20_LE,
+    /** Signed 20bit Big Endian in 4bytes format, LSB justified */
+    S20_BE,
+    /** Unsigned 20bit Little Endian in 4bytes format, LSB justified */
+    U20_LE,
+    /** Unsigned 20bit Big Endian in 4bytes format, LSB justified */
+    U20_BE,
+    /** Special */
+    SPECIAL = 31,
+    /** Signed 24bit Little Endian in 3bytes format */
+    S24_3LE = 32,
+    /** Signed 24bit Big Endian in 3bytes format */
+    S24_3BE,
+    /** Unsigned 24bit Little Endian in 3bytes format */
+    U24_3LE,
+    /** Unsigned 24bit Big Endian in 3bytes format */
+    U24_3BE,
+    /** Signed 20bit Little Endian in 3bytes format */
+    S20_3LE,
+    /** Signed 20bit Big Endian in 3bytes format */
+    S20_3BE,
+    /** Unsigned 20bit Little Endian in 3bytes format */
+    U20_3LE,
+    /** Unsigned 20bit Big Endian in 3bytes format */
+    U20_3BE,
+    /** Signed 18bit Little Endian in 3bytes format */
+    S18_3LE,
+    /** Signed 18bit Big Endian in 3bytes format */
+    S18_3BE,
+    /** Unsigned 18bit Little Endian in 3bytes format */
+    U18_3LE,
+    /** Unsigned 18bit Big Endian in 3bytes format */
+    U18_3BE,
+    /* G.723 (ADPCM) 24 kbit/s, 8 samples in 3 bytes */
+    G723_24,
+    /* G.723 (ADPCM) 24 kbit/s, 1 sample in 1 byte */
+    G723_24_1B,
+    /* G.723 (ADPCM) 40 kbit/s, 8 samples in 3 bytes */
+    G723_40,
+    /* G.723 (ADPCM) 40 kbit/s, 1 sample in 1 byte */
+    G723_40_1B,
+    /* Direct Stream Digital (DSD) in 1-byte samples (x8) */
+    DSD_U8,
+    /* Direct Stream Digital (DSD) in 2-byte samples (x16) */
+    DSD_U16_LE,
+    /* Direct Stream Digital (DSD) in 4-byte samples (x32) */
+    DSD_U32_LE,
+    /* Direct Stream Digital (DSD) in 2-byte samples (x16) */
+    DSD_U16_BE,
+    /* Direct Stream Digital (DSD) in 4-byte samples (x32) */
+    DSD_U32_BE,
+    LAST = DSD_U32_BE,
+
+    /** Signed 16 bit CPU endian */
+    S16 = S16_BE when ODIN_ENDIAN == .Big else S16_LE,
+    /** Unsigned 16 bit CPU endian */
+    U16 = U16_BE when ODIN_ENDIAN == .Big else U16_LE,
+    /** Signed 24 bit CPU endian */
+    S24 = S24_BE when ODIN_ENDIAN == .Big else S32_LE,
+    /** Unsigned 24 bit CPU endian */
+    U24 = U24_BE when ODIN_ENDIAN == .Big else U24_LE,
+    /** Signed 32 bit CPU endian */
+    S32 = S32_BE when ODIN_ENDIAN == .Big else S32_LE,
+    /** Unsigned 32 bit CPU endian */
+    U32 = U32_BE when ODIN_ENDIAN == .Big else U32_LE,
+    /** Float 32 bit CPU endian */
+    FLOAT = FLOAT_BE when ODIN_ENDIAN == .Big else FLOAT_LE,
+    /** Float 64 bit CPU endian */
+    FLOAT64 = FLOAT64_BE when ODIN_ENDIAN == .Big else FLOAT64_LE,
+    /** IEC-958 CPU Endian */
+    IEC958_SUBFRAME = IEC958_SUBFRAME_BE when ODIN_ENDIAN == .Big else IEC958_SUBFRAME_LE,
+    /** Signed 20bit in 4bytes format, LSB justified, CPU Endian */
+    S20 = S20_BE when ODIN_ENDIAN == .Big else S20_LE,
+    /** Unsigned 20bit in 4bytes format, LSB justified, CPU Endian */
+    U20 = U20_BE when ODIN_ENDIAN == .Big else U20_LE,
+}
+
+/** PCM access type */
+pcm_access_t :: enum {
+    /** mmap access with simple interleaved channels */
+    MMAP_INTERLEAVED = 0,
+    /** mmap access with simple non interleaved channels */
+    MMAP_NONINTERLEAVED,
+    /** mmap access with complex placement */
+    MMAP_COMPLEX,
+    /** snd_pcm_readi/snd_pcm_writei access */
+    RW_INTERLEAVED,
+    /** snd_pcm_readn/snd_pcm_writen access */
+    RW_NONINTERLEAVED,
+    LAST = RW_NONINTERLEAVED
+}
+
+/** channel positions */
+pcm_chmap_position :: enum i32 {
+	UNKNOWN = 0,	/**< unspecified */
+	NA,		/**< N/A, silent */
+	MONO,		/**< mono stream */
+	FL,		/**< front left */
+	FR,		/**< front right */
+	RL,		/**< rear left */
+	RR,		/**< rear right */
+	FC,		/**< front center */
+	LFE,		/**< LFE */
+	SL,		/**< side left */
+	SR,		/**< side right */
+	RC,		/**< rear center */
+	FLC,		/**< front left center */
+	FRC,		/**< front right center */
+	RLC,		/**< rear left center */
+	RRC,		/**< rear right center */
+	FLW,		/**< front left wide */
+	FRW,		/**< front right wide */
+	FLH,		/**< front left high */
+	FCH,		/**< front center high */
+	FRH,		/**< front right high */
+	TC,		/**< top center */
+	TFL,		/**< top front left */
+	TFR,		/**< top front right */
+	TFC,		/**< top front center */
+	TRL,		/**< top rear left */
+	TRR,		/**< top rear right */
+	TRC,		/**< top rear center */
+	TFLC,		/**< top front left center */
+	TFRC,		/**< top front right center */
+	TSL,		/**< top side left */
+	TSR,		/**< top side right */
+	LLFE,		/**< left LFE */
+	RLFE,		/**< right LFE */
+	BC,		/**< bottom center */
+	BLC,		/**< bottom left center */
+	BRC,		/**< bottom right center */
+	LAST = BRC,
+}
+
+pcm_uframes_t :: c.ulong
+pcm_sframes_t :: c.long
+pcm_t :: struct{}
+pcm_hw_params_t :: struct{}
+
+pcm_chmap_t :: struct {
+	// Number of channels
+	channels: u32,
+	// Channel position array
+	pos: [0]u32,
+}
+
+@(link_prefix="snd_")
+foreign alsa {
+    pcm_open :: proc(pcmp: ^^pcm_t, name: cstring, stream: pcm_stream_t, mode: pcm_open_flags) -> i32 ---
+    strerror :: proc(errnum: i32) -> cstring ---
+    pcm_set_params :: proc(
+        pcm: ^pcm_t,
+        format: pcm_format_t,
+        access: pcm_access_t,
+        channels: u32,
+        rate: u32,
+        soft_resample: i32,
+        latency: u32) -> i32 ---
+    pcm_drain :: proc(pcm: ^pcm_t) -> i32 ---
+    pcm_close :: proc(pcm: ^pcm_t) -> i32 ---
+    pcm_writei :: proc(pcm: ^pcm_t, buffer: rawptr, size: pcm_uframes_t) -> pcm_sframes_t ---
+	pcm_hw_params_set_channels :: proc(pcm: ^pcm_t, params: ^pcm_hw_params_t, val: u32) ---
+	pcm_chmap_long_name :: proc(val: pcm_chmap_position) -> cstring ---
+	pcm_get_chmap :: proc(pcm: ^pcm_t) -> ^pcm_chmap_t ---
+}