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ABelliqueux 2021-08-14 19:03:16 +02:00
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hello_multi_vag/hello_multi_vag.c
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// VAGDEMO2020 by Schnappy
// December 2020
// Based on VAGDEMO_FIXED by Yagotzirck
// Based on VAGDEMO by Shadow
// based on psyq/addons/sound/TUTO3.C
// Hello multi vag by Schnappy
// August 2021
//
//
// Load two VAG file to SPU sound buffer and play them back alternatively or simultaneously.
//
// WAV creation: use ffmpeg to create a 16-bit ADPCM mono WAV file - change -ar to reduce filesize (and quality)
// $ ffmpeg -i input.ext -f s16le -ac 1 -ar 44100 tmp.dat
//
// WAV to VAG convertion using WAV2VAG : https://github.com/ColdSauce/psxsdk/blob/master/tools/wav2vag.c
// change -freq according to the -ar setting above
// $ wav2vag tmp.dat output.vag -sraw16 -freq=44100 (-L)
//
// Alternatively, you can use PsyQ VAGEDIT.EXE to change the sampling frequency of an existing VAG file.
// Load VAG samples to the SPU sound buffer and play them back with pad input
//
// See here for more details, file format infos, tools, conversion :
// https://github.com/ABelliqueux/nolibgs_hello_worlds/wiki/VAG
// Docs : see libformat47.pdf p.209
// libover47.pdf, p.271
// libref47.pdf, p.980
// URLS : http://psx.arthus.net/code/VAG/
// https://github.com/ABelliqueux/nolibgs_hello_worlds/tree/main/VAG
#include <sys/types.h>
#include <stdio.h>
#include <libgte.h>