+/*
+ (C) Copyright 2007,2008, Stephen M. Cameron.
+
+ This file is part of wordwarvi.
+
+ wordwarvi is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ wordwarvi is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with wordwarvi; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+ */
+
+#ifndef WWVIAUDIO_STUBS_ONLY
+
+#include <stdio.h>
+#include <stdint.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+#define WWVIAUDIO_DEFINE_GLOBALS
+#include "wwviaudio.h"
+#undef WWVIAUDIO_DEFINE_GLOBALS
+
+#include "portaudio.h"
+#include "ccan/ogg_to_pcm/ogg_to_pcm.h"
+
+#define FRAMES_PER_BUFFER (1024)
+
+static PaStream *stream = NULL;
+static int audio_paused = 0;
+static int music_playing = 1;
+static int sound_working = 0;
+static int nomusic = 0;
+static int sound_effects_on = 1;
+static int sound_device = -1; /* default sound device for port audio. */
+static int max_concurrent_sounds = 0;
+static int max_sound_clips = 0;
+
+/* Pause all audio output, output silence. */
+void wwviaudio_pause_audio(void)
+{
+ audio_paused = 1;
+}
+
+/* Resume playing audio previously paused. */
+void wwviaudio_resume_audio(void)
+{
+ audio_paused = 0;
+}
+
+/* Silence the music channel */
+void wwviaudio_silence_music(void)
+{
+ music_playing = 0;
+}
+
+/* Resume volume on the music channel. */
+void wwviaudio_resume_music(void)
+{
+ music_playing = 1;
+}
+
+void wwviaudio_toggle_music(void)
+{
+ music_playing = !music_playing;
+}
+
+/* Silence the sound effects. */
+void wwviaudio_silence_sound_effects(void)
+{
+ sound_effects_on = 0;
+}
+
+/* Resume volume on the sound effects. */
+void wwviaudio_resume_sound_effects(void)
+{
+ sound_effects_on = 1;
+}
+
+void wwviaudio_toggle_sound_effects(void)
+{
+ sound_effects_on = !sound_effects_on;
+}
+
+void wwviaudio_set_nomusic(void)
+{
+ nomusic = 1;
+}
+
+static struct sound_clip {
+ int active;
+ int nsamples;
+ int pos;
+ int16_t *sample;
+} *clip = NULL;
+
+static struct sound_clip *audio_queue = NULL;
+
+int wwviaudio_read_ogg_clip(int clipnum, char *filename)
+{
+ uint64_t nframes;
+ char filebuf[PATH_MAX];
+ struct stat statbuf;
+ int samplesize, sample_rate;
+ int nchannels;
+ int rc;
+
+ if (clipnum >= max_sound_clips || clipnum < 0)
+ return -1;
+
+ strncpy(filebuf, filename, PATH_MAX);
+ rc = stat(filebuf, &statbuf);
+ if (rc != 0) {
+ snprintf(filebuf, PATH_MAX, "%s", filename);
+ rc = stat(filebuf, &statbuf);
+ if (rc != 0) {
+ fprintf(stderr, "stat('%s') failed.\n", filebuf);
+ return -1;
+ }
+ }
+/*
+ printf("Reading sound file: '%s'\n", filebuf);
+ printf("frames = %lld\n", sfinfo.frames);
+ printf("samplerate = %d\n", sfinfo.samplerate);
+ printf("channels = %d\n", sfinfo.channels);
+ printf("format = %d\n", sfinfo.format);
+ printf("sections = %d\n", sfinfo.sections);
+ printf("seekable = %d\n", sfinfo.seekable);
+*/
+ if (clip[clipnum].sample != NULL)
+ /* overwriting a previously read clip... */
+ free(clip[clipnum].sample);
+
+ rc = ogg_to_pcm(filebuf, &clip[clipnum].sample, &samplesize,
+ &sample_rate, &nchannels, &nframes);
+ if (clip[clipnum].sample == NULL) {
+ printf("Can't get memory for sound data for %llu frames in %s\n",
+ nframes, filebuf);
+ goto error;
+ }
+
+ if (rc != 0) {
+ fprintf(stderr, "Error: ogg_to_pcm('%s') failed.\n",
+ filebuf);
+ goto error;
+ }
+
+ clip[clipnum].nsamples = (int) nframes;
+ if (clip[clipnum].nsamples < 0)
+ clip[clipnum].nsamples = 0;
+
+ return 0;
+error:
+ return -1;
+}
+
+/* This routine will be called by the PortAudio engine when audio is needed.
+** It may called at interrupt level on some machines so don't do anything
+** that could mess up the system like calling malloc() or free().
+*/
+static int patestCallback(const void *inputBuffer, void *outputBuffer,
+ unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo* timeInfo,
+ PaStreamCallbackFlags statusFlags, __attribute__ ((unused)) void *userData )
+{
+ int i, j, sample, count;
+ float *out = NULL;
+ float output;
+ out = (float*) outputBuffer;
+ output = 0.0;
+ count = 0;
+
+ if (audio_paused) {
+ /* output silence when paused and
+ * don't advance any sound slot pointers
+ */
+ for (i = 0; i < framesPerBuffer; i++)
+ *out++ = (float) 0;
+ return 0;
+ }
+
+ for (i = 0; i < framesPerBuffer; i++) {
+ output = 0.0;
+ count = 0;
+ for (j = 0; j < max_concurrent_sounds; j++) {
+ if (!audio_queue[j].active ||
+ audio_queue[j].sample == NULL)
+ continue;
+ sample = i + audio_queue[j].pos;
+ count++;
+ if (sample >= audio_queue[j].nsamples) {
+ audio_queue[j].active = 0;
+ continue;
+ }
+ if (j != WWVIAUDIO_MUSIC_SLOT && sound_effects_on)
+ output += (float) audio_queue[j].sample[sample] * 0.5 / (float) (INT16_MAX);
+ else if (j == WWVIAUDIO_MUSIC_SLOT && music_playing)
+ output += (float) audio_queue[j].sample[sample] / (float) (INT16_MAX);
+ }
+ *out++ = (float) output / 2.0;
+ }
+ for (i = 0; i < max_concurrent_sounds; i++) {
+ if (!audio_queue[i].active)
+ continue;
+ audio_queue[i].pos += framesPerBuffer;
+ if (audio_queue[i].pos >= audio_queue[i].nsamples)
+ audio_queue[i].active = 0;
+ }
+ return 0; /* we're never finished */
+}
+
+
+static void decode_paerror(PaError rc)
+{
+ if (rc == paNoError)
+ return;
+ fprintf(stderr, "An error occured while using the portaudio stream\n");
+ fprintf(stderr, "Error number: %d\n", rc);
+ fprintf(stderr, "Error message: %s\n", Pa_GetErrorText(rc));
+}
+
+static void wwviaudio_terminate_portaudio(PaError rc)
+{
+ Pa_Terminate();
+ decode_paerror(rc);
+}
+
+int wwviaudio_initialize_portaudio(int maximum_concurrent_sounds, int maximum_sound_clips)
+{
+ PaStreamParameters outparams;
+ PaError rc;
+ PaDeviceIndex device_count;
+
+ max_concurrent_sounds = maximum_concurrent_sounds;
+ max_sound_clips = maximum_sound_clips;
+
+ audio_queue = malloc(max_concurrent_sounds * sizeof(audio_queue[0]));
+ clip = malloc(max_sound_clips * sizeof(clip[0]));
+ if (audio_queue == NULL || clip == NULL)
+ return -1;
+
+ memset(audio_queue, 0, sizeof(audio_queue[0]) * max_concurrent_sounds);
+ memset(clip, 0, sizeof(clip[0]) * max_sound_clips);
+
+ rc = Pa_Initialize();
+ if (rc != paNoError)
+ goto error;
+
+ device_count = Pa_GetDeviceCount();
+ printf("Portaudio reports %d sound devices.\n", device_count);
+
+ if (device_count == 0) {
+ printf("There will be no audio.\n");
+ goto error;
+ rc = 0;
+ }
+ sound_working = 1;
+
+ outparams.device = Pa_GetDefaultOutputDevice(); /* default output device */
+
+ printf("Portaudio says the default device is: %d\n", outparams.device);
+
+ if (sound_device != -1) {
+ if (sound_device >= device_count)
+ fprintf(stderr, "wordwarvi: Invalid sound device "
+ "%d specified, ignoring.\n", sound_device);
+ else
+ outparams.device = sound_device;
+ printf("Using sound device %d\n", outparams.device);
+ }
+
+ if (outparams.device < 0 && device_count > 0) {
+ printf("Hmm, that's strange, portaudio says the default device is %d,\n"
+ " but there are %d devices\n",
+ outparams.device, device_count);
+ printf("I think we'll just skip sound for now.\n");
+ printf("You might try the '--sounddevice' option and see if that helps.\n");
+ sound_working = 0;
+ return -1;
+ }
+
+ outparams.channelCount = 1; /* mono output */
+ outparams.sampleFormat = paFloat32; /* 32 bit floating point output */
+ outparams.suggestedLatency =
+ Pa_GetDeviceInfo(outparams.device)->defaultLowOutputLatency;
+ outparams.hostApiSpecificStreamInfo = NULL;
+
+ rc = Pa_OpenStream(&stream,
+ NULL, /* no input */
+ &outparams, WWVIAUDIO_SAMPLE_RATE, FRAMES_PER_BUFFER,
+ paNoFlag, /* paClipOff, */ /* we won't output out of range samples so don't bother clipping them */
+ patestCallback, NULL /* cookie */);
+ if (rc != paNoError)
+ goto error;
+ if ((rc = Pa_StartStream(stream)) != paNoError)
+ goto error;
+ return rc;
+error:
+ wwviaudio_terminate_portaudio(rc);
+ return rc;
+}
+
+
+void wwviaudio_stop_portaudio(void)
+{
+ int i, rc;
+
+ if (!sound_working)
+ return;
+ if ((rc = Pa_StopStream(stream)) != paNoError)
+ goto error;
+ rc = Pa_CloseStream(stream);
+error:
+ wwviaudio_terminate_portaudio(rc);
+ if (audio_queue) {
+ free(audio_queue);
+ audio_queue = NULL;
+ max_concurrent_sounds = 0;
+ }
+ if (clip) {
+ for (i = 0; i < max_sound_clips; i++) {
+ if (clip[i].sample)
+ free(clip[i].sample);
+ }
+ free(clip);
+ clip = NULL;
+ max_sound_clips = 0;
+ }
+ return;
+}
+
+static int wwviaudio_add_sound_to_slot(int which_sound, int which_slot)
+{
+ int i;
+
+ if (!sound_working)
+ return 0;
+
+ if (nomusic && which_slot == WWVIAUDIO_MUSIC_SLOT)
+ return 0;
+
+ if (which_slot != WWVIAUDIO_ANY_SLOT) {
+ if (audio_queue[which_slot].active)
+ audio_queue[which_slot].active = 0;
+ audio_queue[which_slot].pos = 0;
+ audio_queue[which_slot].nsamples = 0;
+ /* would like to put a memory barrier here. */
+ audio_queue[which_slot].sample = clip[which_sound].sample;
+ audio_queue[which_slot].nsamples = clip[which_sound].nsamples;
+ /* would like to put a memory barrier here. */
+ audio_queue[which_slot].active = 1;
+ return which_slot;
+ }
+ for (i=1;i<max_concurrent_sounds;i++) {
+ if (audio_queue[i].active == 0) {
+ audio_queue[i].nsamples = clip[which_sound].nsamples;
+ audio_queue[i].pos = 0;
+ audio_queue[i].sample = clip[which_sound].sample;
+ audio_queue[i].active = 1;
+ break;
+ }
+ }
+ return (i >= max_concurrent_sounds) ? -1 : i;
+}
+
+int wwviaudio_add_sound(int which_sound)
+{
+ return wwviaudio_add_sound_to_slot(which_sound, WWVIAUDIO_ANY_SLOT);
+}
+
+int wwviaudio_play_music(int which_sound)
+{
+ return wwviaudio_add_sound_to_slot(which_sound, WWVIAUDIO_MUSIC_SLOT);
+}
+
+
+void wwviaudio_add_sound_low_priority(int which_sound)
+{
+
+ /* adds a sound if there are at least 5 empty sound slots. */
+ int i;
+ int empty_slots = 0;
+ int last_slot;
+
+ if (!sound_working)
+ return;
+ last_slot = -1;
+ for (i = 1; i < max_concurrent_sounds; i++)
+ if (audio_queue[i].active == 0) {
+ last_slot = i;
+ empty_slots++;
+ if (empty_slots >= 5)
+ break;
+ }
+
+ if (empty_slots < 5)
+ return;
+
+ i = last_slot;
+
+ if (audio_queue[i].active == 0) {
+ audio_queue[i].nsamples = clip[which_sound].nsamples;
+ audio_queue[i].pos = 0;
+ audio_queue[i].sample = clip[which_sound].sample;
+ audio_queue[i].active = 1;
+ }
+ return;
+}
+
+
+void wwviaudio_cancel_sound(int queue_entry)
+{
+ if (!sound_working)
+ return;
+ audio_queue[queue_entry].active = 0;
+}
+
+void wwviaudio_cancel_music(void)
+{
+ wwviaudio_cancel_sound(WWVIAUDIO_MUSIC_SLOT);
+}
+
+void wwviaudio_cancel_all_sounds(void)
+{
+ int i;
+ if (!sound_working)
+ return;
+ for (i = 0; i < max_concurrent_sounds; i++)
+ audio_queue[i].active = 0;
+}
+
+int wwviaudio_set_sound_device(int device)
+{
+ sound_device = device;
+ return 0;
+}
+
+#else /* stubs only... */
+
+int wwviaudio_initialize_portaudio() { return 0; }
+void wwviaudio_stop_portaudio() { return; }
+void wwviaudio_set_nomusic() { return; }
+int wwviaudio_read_ogg_clip(int clipnum, char *filename) { return 0; }
+
+void wwviaudio_pause_audio() { return; }
+void wwviaudio_resume_audio() { return; }
+
+void wwviaudio_silence_music() { return; }
+void wwviaudio_resume_music() { return; }
+void wwviaudio_silence_sound_effects() { return; }
+void wwviaudio_resume_sound_effects() { return; }
+void wwviaudio_toggle_sound_effects() { return; }
+
+int wwviaudio_play_music(int which_sound) { return 0; }
+void wwviaudio_cancel_music() { return; }
+void wwviaudio_toggle_music() { return; }
+int wwviaudio_add_sound(int which_sound) { return 0; }
+void wwviaudio_add_sound_low_priority(int which_sound) { return; }
+void wwviaudio_cancel_sound(int queue_entry) { return; }
+void wwviaudio_cancel_all_sounds() { return; }
+int wwviaudio_set_sound_device(int device) { return 0; }
+
+#endif
projects / ccan / commitdiff