Loading the driver

The EE library talks to audio.irx, which the application loads before calling audio_init(). It needs libsd.irx loaded first. The library does not load modules itself, because a library archive cannot carry a module and an application may already have loaded them.

With ps2build, embed the modules in the program and load them from memory:

targets:
  - name: game
    type: ee
    sources: [main.c]
    libs: [audio]
    embed_irx: [libsd, audio]

#include "libsd_irx.h"
#include "audio_irx.h"
 
SifInitRpc(0);
sbv_patch_enable_lmb();
SifExecModuleBuffer(libsd_irx, size_libsd_irx, 0, NULL, NULL);
SifExecModuleBuffer(audio_irx, size_audio_irx, 0, NULL, NULL);
audio_init();

A minimal sound example:

audio_sound_t sound;
 
audio_sound_load_apcm(file, file_size, &sound);
audio_channel_set_volume(0, 80);
audio_channel_play_sound(0, sound);

A minimal stream example, feeding 44100 Hz stereo 16-bit PCM:

audio_stream_format_t format = {44100, 16, 2};
 
audio_stream_start(&format);
while (have_data) {
    audio_stream_wait_until_writable(chunk_bytes, -1);
    audio_stream_queue_pcm(chunk, chunk_bytes);
}