How do you play audio from a wav or mp3 file?

[MrMidnightOfficial]

How do you play audio from a wav or mp3 file?

[larpon]

https://github.com/vlang/v/tree/master/examples/sokol/sounds

https://github.com/vlang/sdl/tree/master/mixer

https://github.com/larpon/miniaudio

[MrMidnightOfficial]

IDK how to use them?

[larpon]

Look at the examples in each repo.

For SDL mixer you can easily seach for C examples and manually translate that to V until we get time to write a specific example for SDL.

[SheatNoisette]

For someone who's trying to find a way to play audio using only the standard modules with the raw bindings, there's a possible way to do this:

module main

import sokol.audio
import encoding.vorbis
import time
import os

struct AudioData {
mut:
	samples []f32
	pos     int
}

fn main() {
	if os.args.len != 2 {
		eprintln('usage: <oggfile.ogg>')
		exit(1)
	}

	file_path := os.args[1]

	if !os.exists(file_path) {
		panic('File missing or not found!')
	}

	song := vorbis.decode_file(file_path) or { panic('Failed to load file: ${err}') }
	defer { unsafe { song.free() } }

	println('Loaded: ${song.path}')
	println('Sample Rate: ${song.sample_rate}')
	println('Channels: ${song.channels}')
	println('Samples: ${song.sample_len}')

	samples_f32 := []f32{cap: song.sample_len * song.channels}
	unsafe {
		for i in 0 .. song.sample_len * song.channels {
			samples_f32 << f32(song.data[i]) / 32768.0
		}
	}
	audio_data := AudioData{
		samples: samples_f32
		pos:     0
	}

	audio.setup(
		sample_rate:        song.sample_rate
		num_channels:       song.channels
		stream_userdata_cb: audio_stream_callback
		user_data:          voidptr(&audio_data)
	)

	println('Playing...')
	mut last_print_time := time.now()
	for {
		now := time.now()
		if now - last_print_time >= time.second {
			current_sec := (audio_data.pos / song.channels) / song.sample_rate
			total_sec := (audio_data.samples.len / song.channels) / song.sample_rate
			println('Current time: ${current_sec}s / ${total_sec}s')
			last_print_time = now
		}
		if audio_data.pos >= audio_data.samples.len {
			break
		}
		time.sleep(100 * time.millisecond)
	}

	audio.shutdown()

	println('Done!')
}

fn audio_stream_callback(buffer &f32, num_frames int, num_channels int, user_data voidptr) {
	mut data := unsafe { &AudioData(user_data) }

	unsafe {
		mut buf := buffer
		total_samples := num_frames * num_channels

		for i in 0 .. total_samples {
			if data.pos >= data.samples.len {
				buf[i] = 0.0
			} else {
				buf[i] = data.samples[data.pos]
				data.pos++
			}
		}
	}
}

Only a Ogg decoder is present, so you may need to convert your song using ffmpeg (ffmpeg -i music.mp3 -c:a libvorbis -q:a 4 output.ogg)

[spytheman]

There is also a streaming ogg player, that does not decode the whole file in advance, but it is a bit more complex/longer in https://github.com/vlang/v/blob/master/examples/sokol/sounds/ogg_player.v .