static inline int32_t * samples_get_rdbuf(void)
{
ci->semaphore_wait(&sample_queue.emu_sem_head);
if (ci->stop_codec || ci->new_track)
{
/* Told to stop. Buffer must be released. */
samples_release_rdbuf();
return NULL;
}
return sample_queue.wav_chunk[sample_queue.head & WAV_CHUNK_MASK].audio;
}
static intptr_t emu_thread_send_msg(long id, intptr_t data)
{
struct sample_queue_chunk *chunk;
/* Grab an audio output buffer */
ci->semaphore_wait(&sample_queue.emu_sem_head, TIMEOUT_BLOCK);
chunk = &sample_queue.wav_chunk[sample_queue.head & WAV_CHUNK_MASK];
/* Place a message in it instead of audio */
chunk->id = id;
chunk->data = data;
/* Release it to the emu thread */
samples_release_rdbuf();
if (id != SPC_EMU_QUIT) {
/* Wait for a response */
ci->semaphore_wait(&sample_queue.emu_evt_reply, TIMEOUT_BLOCK);
}
return sample_queue.retval;
}
