Chris@41: /* Chris@41: ** Copyright (c) 1999-2016, Erik de Castro Lopo Chris@41: ** All rights reserved. Chris@41: ** Chris@41: ** This code is released under 2-clause BSD license. Please see the Chris@41: ** file at : https://github.com/erikd/libsamplerate/blob/master/COPYING Chris@41: */ Chris@41: Chris@41: #include Chris@41: #include Chris@41: #include Chris@41: #include Chris@41: Chris@41: #include Chris@41: Chris@41: #include "audio_out.h" Chris@41: Chris@41: #if HAVE_ALSA_ASOUNDLIB_H Chris@41: #define ALSA_PCM_NEW_HW_PARAMS_API Chris@41: #define ALSA_PCM_NEW_SW_PARAMS_API Chris@41: #include Chris@41: #include Chris@41: #endif Chris@41: Chris@41: #if (HAVE_SNDFILE) Chris@41: Chris@41: #include Chris@41: Chris@41: #include Chris@41: Chris@41: #define BUFFER_LEN (2048) Chris@41: Chris@41: #define MAKE_MAGIC(a,b,c,d,e,f,g,h) \ Chris@41: ((a) + ((b) << 1) + ((c) << 2) + ((d) << 3) + ((e) << 4) + ((f) << 5) + ((g) << 6) + ((h) << 7)) Chris@41: Chris@41: typedef struct AUDIO_OUT_s Chris@41: { int magic ; Chris@41: } AUDIO_OUT ; Chris@41: Chris@41: Chris@41: /*------------------------------------------------------------------------------ Chris@41: ** Linux (ALSA and OSS) functions for playing a sound. Chris@41: */ Chris@41: Chris@41: #if defined (__linux__) Chris@41: Chris@41: #if HAVE_ALSA_ASOUNDLIB_H Chris@41: Chris@41: #define ALSA_MAGIC MAKE_MAGIC ('L', 'n', 'x', '-', 'A', 'L', 'S', 'A') Chris@41: Chris@41: typedef struct Chris@41: { int magic ; Chris@41: snd_pcm_t * dev ; Chris@41: int channels ; Chris@41: } ALSA_AUDIO_OUT ; Chris@41: Chris@41: static int alsa_write_float (snd_pcm_t *alsa_dev, float *data, int frames, int channels) ; Chris@41: Chris@41: static AUDIO_OUT * Chris@41: alsa_open (int channels, unsigned samplerate) Chris@41: { ALSA_AUDIO_OUT *alsa_out ; Chris@41: const char * device = "default" ; Chris@41: snd_pcm_hw_params_t *hw_params ; Chris@41: snd_pcm_uframes_t buffer_size ; Chris@41: snd_pcm_uframes_t alsa_period_size, alsa_buffer_frames ; Chris@41: snd_pcm_sw_params_t *sw_params ; Chris@41: Chris@41: int err ; Chris@41: Chris@41: alsa_period_size = 1024 ; Chris@41: alsa_buffer_frames = 4 * alsa_period_size ; Chris@41: Chris@41: if ((alsa_out = calloc (1, sizeof (ALSA_AUDIO_OUT))) == NULL) Chris@41: { perror ("alsa_open : malloc ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: alsa_out->magic = ALSA_MAGIC ; Chris@41: alsa_out->channels = channels ; Chris@41: Chris@41: if ((err = snd_pcm_open (&alsa_out->dev, device, SND_PCM_STREAM_PLAYBACK, 0)) < 0) Chris@41: { fprintf (stderr, "cannot open audio device \"%s\" (%s)\n", device, snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: snd_pcm_nonblock (alsa_out->dev, 0) ; Chris@41: Chris@41: if ((err = snd_pcm_hw_params_malloc (&hw_params)) < 0) Chris@41: { fprintf (stderr, "cannot allocate hardware parameter structure (%s)\n", snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: if ((err = snd_pcm_hw_params_any (alsa_out->dev, hw_params)) < 0) Chris@41: { fprintf (stderr, "cannot initialize hardware parameter structure (%s)\n", snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: if ((err = snd_pcm_hw_params_set_access (alsa_out->dev, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) Chris@41: { fprintf (stderr, "cannot set access type (%s)\n", snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: if ((err = snd_pcm_hw_params_set_format (alsa_out->dev, hw_params, SND_PCM_FORMAT_FLOAT)) < 0) Chris@41: { fprintf (stderr, "cannot set sample format (%s)\n", snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: if ((err = snd_pcm_hw_params_set_rate_near (alsa_out->dev, hw_params, &samplerate, 0)) < 0) Chris@41: { fprintf (stderr, "cannot set sample rate (%s)\n", snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: if ((err = snd_pcm_hw_params_set_channels (alsa_out->dev, hw_params, channels)) < 0) Chris@41: { fprintf (stderr, "cannot set channel count (%s)\n", snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: if ((err = snd_pcm_hw_params_set_buffer_size_near (alsa_out->dev, hw_params, &alsa_buffer_frames)) < 0) Chris@41: { fprintf (stderr, "cannot set buffer size (%s)\n", snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: if ((err = snd_pcm_hw_params_set_period_size_near (alsa_out->dev, hw_params, &alsa_period_size, 0)) < 0) Chris@41: { fprintf (stderr, "cannot set period size (%s)\n", snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: if ((err = snd_pcm_hw_params (alsa_out->dev, hw_params)) < 0) Chris@41: { fprintf (stderr, "cannot set parameters (%s)\n", snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: /* extra check: if we have only one period, this code won't work */ Chris@41: snd_pcm_hw_params_get_period_size (hw_params, &alsa_period_size, 0) ; Chris@41: snd_pcm_hw_params_get_buffer_size (hw_params, &buffer_size) ; Chris@41: if (alsa_period_size == buffer_size) Chris@41: { fprintf (stderr, "Can't use period equal to buffer size (%lu == %lu)", alsa_period_size, buffer_size) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: snd_pcm_hw_params_free (hw_params) ; Chris@41: Chris@41: if ((err = snd_pcm_sw_params_malloc (&sw_params)) != 0) Chris@41: { fprintf (stderr, "%s: snd_pcm_sw_params_malloc: %s", __func__, snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: if ((err = snd_pcm_sw_params_current (alsa_out->dev, sw_params)) != 0) Chris@41: { fprintf (stderr, "%s: snd_pcm_sw_params_current: %s", __func__, snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: /* note: set start threshold to delay start until the ring buffer is full */ Chris@41: snd_pcm_sw_params_current (alsa_out->dev, sw_params) ; Chris@41: Chris@41: if ((err = snd_pcm_sw_params_set_start_threshold (alsa_out->dev, sw_params, buffer_size)) < 0) Chris@41: { fprintf (stderr, "cannot set start threshold (%s)\n", snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: if ((err = snd_pcm_sw_params (alsa_out->dev, sw_params)) != 0) Chris@41: { fprintf (stderr, "%s: snd_pcm_sw_params: %s", __func__, snd_strerror (err)) ; Chris@41: goto catch_error ; Chris@41: } ; Chris@41: Chris@41: snd_pcm_sw_params_free (sw_params) ; Chris@41: Chris@41: snd_pcm_reset (alsa_out->dev) ; Chris@41: Chris@41: catch_error : Chris@41: Chris@41: if (err < 0 && alsa_out->dev != NULL) Chris@41: { snd_pcm_close (alsa_out->dev) ; Chris@41: return NULL ; Chris@41: } ; Chris@41: Chris@41: return (AUDIO_OUT *) alsa_out ; Chris@41: } /* alsa_open */ Chris@41: Chris@41: static void Chris@41: alsa_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) Chris@41: { static float buffer [BUFFER_LEN] ; Chris@41: ALSA_AUDIO_OUT *alsa_out ; Chris@41: int read_frames ; Chris@41: Chris@41: if ((alsa_out = (ALSA_AUDIO_OUT*) audio_out) == NULL) Chris@41: { printf ("alsa_close : AUDIO_OUT is NULL.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (alsa_out->magic != ALSA_MAGIC) Chris@41: { printf ("alsa_close : Bad magic number.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: while ((read_frames = callback (callback_data, buffer, BUFFER_LEN / alsa_out->channels))) Chris@41: alsa_write_float (alsa_out->dev, buffer, read_frames, alsa_out->channels) ; Chris@41: Chris@41: return ; Chris@41: } /* alsa_play */ Chris@41: Chris@41: static int Chris@41: alsa_write_float (snd_pcm_t *alsa_dev, float *data, int frames, int channels) Chris@41: { static int epipe_count = 0 ; Chris@41: Chris@41: int total = 0 ; Chris@41: int retval ; Chris@41: Chris@41: if (epipe_count > 0) Chris@41: epipe_count -- ; Chris@41: Chris@41: while (total < frames) Chris@41: { retval = snd_pcm_writei (alsa_dev, data + total * channels, frames - total) ; Chris@41: Chris@41: if (retval >= 0) Chris@41: { total += retval ; Chris@41: if (total == frames) Chris@41: return total ; Chris@41: Chris@41: continue ; Chris@41: } ; Chris@41: Chris@41: switch (retval) Chris@41: { case -EAGAIN : Chris@41: puts ("alsa_write_float: EAGAIN") ; Chris@41: continue ; Chris@41: break ; Chris@41: Chris@41: case -EPIPE : Chris@41: if (epipe_count > 0) Chris@41: { printf ("alsa_write_float: EPIPE %d\n", epipe_count) ; Chris@41: if (epipe_count > 140) Chris@41: return retval ; Chris@41: } ; Chris@41: epipe_count += 100 ; Chris@41: Chris@41: #if 0 Chris@41: if (0) Chris@41: { snd_pcm_status_t *status ; Chris@41: Chris@41: snd_pcm_status_alloca (&status) ; Chris@41: if ((retval = snd_pcm_status (alsa_dev, status)) < 0) Chris@41: fprintf (stderr, "alsa_out: xrun. can't determine length\n") ; Chris@41: else if (snd_pcm_status_get_state (status) == SND_PCM_STATE_XRUN) Chris@41: { struct timeval now, diff, tstamp ; Chris@41: Chris@41: gettimeofday (&now, 0) ; Chris@41: snd_pcm_status_get_trigger_tstamp (status, &tstamp) ; Chris@41: timersub (&now, &tstamp, &diff) ; Chris@41: Chris@41: fprintf (stderr, "alsa_write_float xrun: of at least %.3f msecs. resetting stream\n", Chris@41: diff.tv_sec * 1000 + diff.tv_usec / 1000.0) ; Chris@41: } Chris@41: else Chris@41: fprintf (stderr, "alsa_write_float: xrun. can't determine length\n") ; Chris@41: } ; Chris@41: #endif Chris@41: Chris@41: snd_pcm_prepare (alsa_dev) ; Chris@41: break ; Chris@41: Chris@41: case -EBADFD : Chris@41: fprintf (stderr, "alsa_write_float: Bad PCM state.n") ; Chris@41: return 0 ; Chris@41: break ; Chris@41: Chris@41: case -ESTRPIPE : Chris@41: fprintf (stderr, "alsa_write_float: Suspend event.n") ; Chris@41: return 0 ; Chris@41: break ; Chris@41: Chris@41: case -EIO : Chris@41: puts ("alsa_write_float: EIO") ; Chris@41: return 0 ; Chris@41: Chris@41: default : Chris@41: fprintf (stderr, "alsa_write_float: retval = %d\n", retval) ; Chris@41: return 0 ; Chris@41: break ; Chris@41: } ; /* switch */ Chris@41: } ; /* while */ Chris@41: Chris@41: return total ; Chris@41: } /* alsa_write_float */ Chris@41: Chris@41: static void Chris@41: alsa_close (AUDIO_OUT *audio_out) Chris@41: { ALSA_AUDIO_OUT *alsa_out ; Chris@41: Chris@41: if ((alsa_out = (ALSA_AUDIO_OUT*) audio_out) == NULL) Chris@41: { printf ("alsa_close : AUDIO_OUT is NULL.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (alsa_out->magic != ALSA_MAGIC) Chris@41: { printf ("alsa_close : Bad magic number.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: memset (alsa_out, 0, sizeof (ALSA_AUDIO_OUT)) ; Chris@41: Chris@41: free (alsa_out) ; Chris@41: Chris@41: return ; Chris@41: } /* alsa_close */ Chris@41: Chris@41: #endif /* HAVE_ALSA_ASOUNDLIB_H */ Chris@41: Chris@41: #include Chris@41: #include Chris@41: #include Chris@41: Chris@41: #define OSS_MAGIC MAKE_MAGIC ('L', 'i', 'n', 'u', 'x', 'O', 'S', 'S') Chris@41: Chris@41: typedef struct Chris@41: { int magic ; Chris@41: int fd ; Chris@41: int channels ; Chris@41: } OSS_AUDIO_OUT ; Chris@41: Chris@41: static AUDIO_OUT *opensoundsys_open (int channels, int samplerate) ; Chris@41: static void opensoundsys_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) ; Chris@41: static void opensoundsys_close (AUDIO_OUT *audio_out) ; Chris@41: Chris@41: Chris@41: static AUDIO_OUT * Chris@41: opensoundsys_open (int channels, int samplerate) Chris@41: { OSS_AUDIO_OUT *opensoundsys_out ; Chris@41: int stereo, fmt, error ; Chris@41: Chris@41: if ((opensoundsys_out = calloc (1, sizeof (OSS_AUDIO_OUT))) == NULL) Chris@41: { perror ("opensoundsys_open : malloc ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: opensoundsys_out->magic = OSS_MAGIC ; Chris@41: opensoundsys_out->channels = channels ; Chris@41: Chris@41: if ((opensoundsys_out->fd = open ("/dev/dsp", O_WRONLY, 0)) == -1) Chris@41: { perror ("opensoundsys_open : open ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: stereo = 0 ; Chris@41: if (ioctl (opensoundsys_out->fd, SNDCTL_DSP_STEREO, &stereo) == -1) Chris@41: { /* Fatal error */ Chris@41: perror ("opensoundsys_open : stereo ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: if (ioctl (opensoundsys_out->fd, SNDCTL_DSP_RESET, 0)) Chris@41: { perror ("opensoundsys_open : reset ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: fmt = CPU_IS_BIG_ENDIAN ? AFMT_S16_BE : AFMT_S16_LE ; Chris@41: if (ioctl (opensoundsys_out->fd, SNDCTL_DSP_SETFMT, &fmt) != 0) Chris@41: { perror ("opensoundsys_open_dsp_device : set format ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: if ((error = ioctl (opensoundsys_out->fd, SNDCTL_DSP_CHANNELS, &channels)) != 0) Chris@41: { perror ("opensoundsys_open : channels ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: if ((error = ioctl (opensoundsys_out->fd, SNDCTL_DSP_SPEED, &samplerate)) != 0) Chris@41: { perror ("opensoundsys_open : sample rate ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: if ((error = ioctl (opensoundsys_out->fd, SNDCTL_DSP_SYNC, 0)) != 0) Chris@41: { perror ("opensoundsys_open : sync ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: return (AUDIO_OUT*) opensoundsys_out ; Chris@41: } /* opensoundsys_open */ Chris@41: Chris@41: static void Chris@41: opensoundsys_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) Chris@41: { OSS_AUDIO_OUT *opensoundsys_out ; Chris@41: static float float_buffer [BUFFER_LEN] ; Chris@41: static short buffer [BUFFER_LEN] ; Chris@41: int k, read_frames ; Chris@41: Chris@41: if ((opensoundsys_out = (OSS_AUDIO_OUT*) audio_out) == NULL) Chris@41: { printf ("opensoundsys_play : AUDIO_OUT is NULL.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (opensoundsys_out->magic != OSS_MAGIC) Chris@41: { printf ("opensoundsys_play : Bad magic number.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: while ((read_frames = callback (callback_data, float_buffer, BUFFER_LEN / opensoundsys_out->channels))) Chris@41: { for (k = 0 ; k < read_frames * opensoundsys_out->channels ; k++) Chris@41: buffer [k] = lrint (32767.0 * float_buffer [k]) ; Chris@41: (void) write (opensoundsys_out->fd, buffer, read_frames * opensoundsys_out->channels * sizeof (short)) ; Chris@41: } ; Chris@41: Chris@41: return ; Chris@41: } /* opensoundsys_play */ Chris@41: Chris@41: static void Chris@41: opensoundsys_close (AUDIO_OUT *audio_out) Chris@41: { OSS_AUDIO_OUT *opensoundsys_out ; Chris@41: Chris@41: if ((opensoundsys_out = (OSS_AUDIO_OUT*) audio_out) == NULL) Chris@41: { printf ("opensoundsys_close : AUDIO_OUT is NULL.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (opensoundsys_out->magic != OSS_MAGIC) Chris@41: { printf ("opensoundsys_close : Bad magic number.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: memset (opensoundsys_out, 0, sizeof (OSS_AUDIO_OUT)) ; Chris@41: Chris@41: free (opensoundsys_out) ; Chris@41: Chris@41: return ; Chris@41: } /* opensoundsys_close */ Chris@41: Chris@41: #endif /* __linux__ */ Chris@41: Chris@41: /*------------------------------------------------------------------------------ Chris@41: ** Mac OS X functions for playing a sound. Chris@41: */ Chris@41: Chris@41: #if (defined (__MACH__) && defined (__APPLE__)) /* MacOSX */ Chris@41: Chris@41: #include Chris@41: #include Chris@41: Chris@41: #define MACOSX_MAGIC MAKE_MAGIC ('M', 'a', 'c', ' ', 'O', 'S', ' ', 'X') Chris@41: Chris@41: typedef struct Chris@41: { int magic ; Chris@41: AudioStreamBasicDescription format ; Chris@41: Chris@41: UInt32 buf_size ; Chris@41: AudioDeviceID device ; Chris@41: Chris@41: int channels ; Chris@41: int samplerate ; Chris@41: int buffer_size ; Chris@41: int done_playing ; Chris@41: Chris@41: get_audio_callback_t callback ; Chris@41: Chris@41: void *callback_data ; Chris@41: } MACOSX_AUDIO_OUT ; Chris@41: Chris@41: static AUDIO_OUT *macosx_open (int channels, int samplerate) ; Chris@41: static void macosx_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) ; Chris@41: static void macosx_close (AUDIO_OUT *audio_out) ; Chris@41: Chris@41: static OSStatus Chris@41: macosx_audio_out_callback (AudioDeviceID device, const AudioTimeStamp* current_time, Chris@41: const AudioBufferList* data_in, const AudioTimeStamp* time_in, Chris@41: AudioBufferList* data_out, const AudioTimeStamp* time_out, void* client_data) ; Chris@41: Chris@41: Chris@41: static AUDIO_OUT * Chris@41: macosx_open (int channels, int samplerate) Chris@41: { MACOSX_AUDIO_OUT *macosx_out ; Chris@41: OSStatus err ; Chris@41: size_t count ; Chris@41: Chris@41: if ((macosx_out = calloc (1, sizeof (MACOSX_AUDIO_OUT))) == NULL) Chris@41: { perror ("macosx_open : malloc ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: macosx_out->magic = MACOSX_MAGIC ; Chris@41: macosx_out->channels = channels ; Chris@41: macosx_out->samplerate = samplerate ; Chris@41: Chris@41: macosx_out->device = kAudioDeviceUnknown ; Chris@41: Chris@41: /* get the default output device for the HAL */ Chris@41: count = sizeof (AudioDeviceID) ; Chris@41: if ((err = AudioHardwareGetProperty (kAudioHardwarePropertyDefaultOutputDevice, Chris@41: &count, (void *) &(macosx_out->device))) != noErr) Chris@41: { printf ("AudioHardwareGetProperty failed.\n") ; Chris@41: free (macosx_out) ; Chris@41: return NULL ; Chris@41: } ; Chris@41: Chris@41: /* get the buffersize that the default device uses for IO */ Chris@41: count = sizeof (UInt32) ; Chris@41: if ((err = AudioDeviceGetProperty (macosx_out->device, 0, false, kAudioDevicePropertyBufferSize, Chris@41: &count, &(macosx_out->buffer_size))) != noErr) Chris@41: { printf ("AudioDeviceGetProperty (AudioDeviceGetProperty) failed.\n") ; Chris@41: free (macosx_out) ; Chris@41: return NULL ; Chris@41: } ; Chris@41: Chris@41: /* get a description of the data format used by the default device */ Chris@41: count = sizeof (AudioStreamBasicDescription) ; Chris@41: if ((err = AudioDeviceGetProperty (macosx_out->device, 0, false, kAudioDevicePropertyStreamFormat, Chris@41: &count, &(macosx_out->format))) != noErr) Chris@41: { printf ("AudioDeviceGetProperty (kAudioDevicePropertyStreamFormat) failed.\n") ; Chris@41: free (macosx_out) ; Chris@41: return NULL ; Chris@41: } ; Chris@41: Chris@41: macosx_out->format.mSampleRate = samplerate ; Chris@41: macosx_out->format.mChannelsPerFrame = channels ; Chris@41: Chris@41: if ((err = AudioDeviceSetProperty (macosx_out->device, NULL, 0, false, kAudioDevicePropertyStreamFormat, Chris@41: sizeof (AudioStreamBasicDescription), &(macosx_out->format))) != noErr) Chris@41: { printf ("AudioDeviceSetProperty (kAudioDevicePropertyStreamFormat) failed.\n") ; Chris@41: free (macosx_out) ; Chris@41: return NULL ; Chris@41: } ; Chris@41: Chris@41: /* we want linear pcm */ Chris@41: if (macosx_out->format.mFormatID != kAudioFormatLinearPCM) Chris@41: { free (macosx_out) ; Chris@41: return NULL ; Chris@41: } ; Chris@41: Chris@41: macosx_out->done_playing = 0 ; Chris@41: Chris@41: /* Fire off the device. */ Chris@41: if ((err = AudioDeviceAddIOProc (macosx_out->device, macosx_audio_out_callback, Chris@41: (void *) macosx_out)) != noErr) Chris@41: { printf ("AudioDeviceAddIOProc failed.\n") ; Chris@41: free (macosx_out) ; Chris@41: return NULL ; Chris@41: } ; Chris@41: Chris@41: return (MACOSX_AUDIO_OUT *) macosx_out ; Chris@41: } /* macosx_open */ Chris@41: Chris@41: static void Chris@41: macosx_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) Chris@41: { MACOSX_AUDIO_OUT *macosx_out ; Chris@41: OSStatus err ; Chris@41: Chris@41: if ((macosx_out = (MACOSX_AUDIO_OUT*) audio_out) == NULL) Chris@41: { printf ("macosx_play : AUDIO_OUT is NULL.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (macosx_out->magic != MACOSX_MAGIC) Chris@41: { printf ("macosx_play : Bad magic number.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: /* Set the callback function and callback data. */ Chris@41: macosx_out->callback = callback ; Chris@41: macosx_out->callback_data = callback_data ; Chris@41: Chris@41: err = AudioDeviceStart (macosx_out->device, macosx_audio_out_callback) ; Chris@41: if (err != noErr) Chris@41: printf ("AudioDeviceStart failed.\n") ; Chris@41: Chris@41: while (macosx_out->done_playing == SF_FALSE) Chris@41: usleep (10 * 1000) ; /* 10 000 milliseconds. */ Chris@41: Chris@41: return ; Chris@41: } /* macosx_play */ Chris@41: Chris@41: static void Chris@41: macosx_close (AUDIO_OUT *audio_out) Chris@41: { MACOSX_AUDIO_OUT *macosx_out ; Chris@41: OSStatus err ; Chris@41: Chris@41: if ((macosx_out = (MACOSX_AUDIO_OUT*) audio_out) == NULL) Chris@41: { printf ("macosx_close : AUDIO_OUT is NULL.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (macosx_out->magic != MACOSX_MAGIC) Chris@41: { printf ("macosx_close : Bad magic number.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: Chris@41: if ((err = AudioDeviceStop (macosx_out->device, macosx_audio_out_callback)) != noErr) Chris@41: { printf ("AudioDeviceStop failed.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: err = AudioDeviceRemoveIOProc (macosx_out->device, macosx_audio_out_callback) ; Chris@41: if (err != noErr) Chris@41: { printf ("AudioDeviceRemoveIOProc failed.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: } /* macosx_close */ Chris@41: Chris@41: static OSStatus Chris@41: macosx_audio_out_callback (AudioDeviceID device, const AudioTimeStamp* current_time, Chris@41: const AudioBufferList* data_in, const AudioTimeStamp* time_in, Chris@41: AudioBufferList* data_out, const AudioTimeStamp* time_out, void* client_data) Chris@41: { MACOSX_AUDIO_OUT *macosx_out ; Chris@41: int k, size, frame_count, read_count ; Chris@41: float *buffer ; Chris@41: Chris@41: if ((macosx_out = (MACOSX_AUDIO_OUT*) client_data) == NULL) Chris@41: { printf ("macosx_play : AUDIO_OUT is NULL.\n") ; Chris@41: return 42 ; Chris@41: } ; Chris@41: Chris@41: if (macosx_out->magic != MACOSX_MAGIC) Chris@41: { printf ("macosx_play : Bad magic number.\n") ; Chris@41: return 42 ; Chris@41: } ; Chris@41: Chris@41: size = data_out->mBuffers [0].mDataByteSize ; Chris@41: frame_count = size / sizeof (float) / macosx_out->channels ; Chris@41: Chris@41: buffer = (float*) data_out->mBuffers [0].mData ; Chris@41: Chris@41: read_count = macosx_out->callback (macosx_out->callback_data, buffer, frame_count) ; Chris@41: Chris@41: if (read_count < frame_count) Chris@41: { memset (&(buffer [read_count]), 0, (frame_count - read_count) * sizeof (float)) ; Chris@41: macosx_out->done_playing = 1 ; Chris@41: } ; Chris@41: Chris@41: return noErr ; Chris@41: } /* macosx_audio_out_callback */ Chris@41: Chris@41: #endif /* MacOSX */ Chris@41: Chris@41: Chris@41: /*------------------------------------------------------------------------------ Chris@41: ** Win32 functions for playing a sound. Chris@41: ** Chris@41: ** This API sucks. Its needlessly complicated and is *WAY* too loose with Chris@41: ** passing pointers arounf in integers and and using char* pointers to Chris@41: ** point to data instead of short*. It plain sucks! Chris@41: */ Chris@41: Chris@41: #if (defined (_WIN32) || defined (WIN32)) Chris@41: Chris@41: #include Chris@41: #include Chris@41: Chris@41: #define WIN32_BUFFER_LEN (1<<15) Chris@41: #define WIN32_MAGIC MAKE_MAGIC ('W', 'i', 'n', '3', '2', 's', 'u', 'x') Chris@41: Chris@41: typedef struct Chris@41: { int magic ; Chris@41: Chris@41: HWAVEOUT hwave ; Chris@41: WAVEHDR whdr [2] ; Chris@41: Chris@41: HANDLE Event ; Chris@41: Chris@41: short short_buffer [WIN32_BUFFER_LEN / sizeof (short)] ; Chris@41: float float_buffer [WIN32_BUFFER_LEN / sizeof (short) / 2] ; Chris@41: Chris@41: int bufferlen, current ; Chris@41: Chris@41: int channels ; Chris@41: Chris@41: get_audio_callback_t callback ; Chris@41: Chris@41: void *callback_data ; Chris@41: } WIN32_AUDIO_OUT ; Chris@41: Chris@41: static AUDIO_OUT *win32_open (int channels, int samplerate) ; Chris@41: static void win32_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) ; Chris@41: static void win32_close (AUDIO_OUT *audio_out) ; Chris@41: Chris@41: static DWORD CALLBACK Chris@41: win32_audio_out_callback (HWAVEOUT hwave, UINT msg, DWORD data, DWORD param1, DWORD param2) ; Chris@41: Chris@41: static AUDIO_OUT* Chris@41: win32_open (int channels, int samplerate) Chris@41: { WIN32_AUDIO_OUT *win32_out ; Chris@41: Chris@41: WAVEFORMATEX wf ; Chris@41: int error ; Chris@41: Chris@41: if ((win32_out = calloc (1, sizeof (WIN32_AUDIO_OUT))) == NULL) Chris@41: { perror ("win32_open : malloc ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: win32_out->magic = WIN32_MAGIC ; Chris@41: win32_out->channels = channels ; Chris@41: Chris@41: win32_out->current = 0 ; Chris@41: Chris@41: win32_out->Event = CreateEvent (0, FALSE, FALSE, 0) ; Chris@41: Chris@41: wf.nChannels = channels ; Chris@41: wf.nSamplesPerSec = samplerate ; Chris@41: wf.nBlockAlign = channels * sizeof (short) ; Chris@41: Chris@41: wf.wFormatTag = WAVE_FORMAT_PCM ; Chris@41: wf.cbSize = 0 ; Chris@41: wf.wBitsPerSample = 16 ; Chris@41: wf.nAvgBytesPerSec = wf.nBlockAlign * wf.nSamplesPerSec ; Chris@41: Chris@41: error = waveOutOpen (&(win32_out->hwave), WAVE_MAPPER, &wf, (DWORD) win32_audio_out_callback, Chris@41: (DWORD) win32_out, CALLBACK_FUNCTION) ; Chris@41: if (error) Chris@41: { puts ("waveOutOpen failed.") ; Chris@41: free (win32_out) ; Chris@41: return NULL ; Chris@41: } ; Chris@41: Chris@41: waveOutPause (win32_out->hwave) ; Chris@41: Chris@41: return (WIN32_AUDIO_OUT *) win32_out ; Chris@41: } /* win32_open */ Chris@41: Chris@41: static void Chris@41: win32_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) Chris@41: { WIN32_AUDIO_OUT *win32_out ; Chris@41: int error ; Chris@41: Chris@41: if ((win32_out = (WIN32_AUDIO_OUT*) audio_out) == NULL) Chris@41: { printf ("win32_play : AUDIO_OUT is NULL.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (win32_out->magic != WIN32_MAGIC) Chris@41: { printf ("win32_play : Bad magic number (%d %d).\n", win32_out->magic, WIN32_MAGIC) ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: /* Set the callback function and callback data. */ Chris@41: win32_out->callback = callback ; Chris@41: win32_out->callback_data = callback_data ; Chris@41: Chris@41: win32_out->whdr [0].lpData = (char*) win32_out->short_buffer ; Chris@41: win32_out->whdr [1].lpData = ((char*) win32_out->short_buffer) + sizeof (win32_out->short_buffer) / 2 ; Chris@41: Chris@41: win32_out->whdr [0].dwBufferLength = sizeof (win32_out->short_buffer) / 2 ; Chris@41: win32_out->whdr [1].dwBufferLength = sizeof (win32_out->short_buffer) / 2 ; Chris@41: Chris@41: win32_out->bufferlen = sizeof (win32_out->short_buffer) / 2 / sizeof (short) ; Chris@41: Chris@41: /* Prepare the WAVEHDRs */ Chris@41: if ((error = waveOutPrepareHeader (win32_out->hwave, &(win32_out->whdr [0]), sizeof (WAVEHDR)))) Chris@41: { printf ("waveOutPrepareHeader [0] failed : %08X\n", error) ; Chris@41: waveOutClose (win32_out->hwave) ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if ((error = waveOutPrepareHeader (win32_out->hwave, &(win32_out->whdr [1]), sizeof (WAVEHDR)))) Chris@41: { printf ("waveOutPrepareHeader [1] failed : %08X\n", error) ; Chris@41: waveOutUnprepareHeader (win32_out->hwave, &(win32_out->whdr [0]), sizeof (WAVEHDR)) ; Chris@41: waveOutClose (win32_out->hwave) ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: waveOutRestart (win32_out->hwave) ; Chris@41: Chris@41: /* Fake 2 calls to the callback function to queue up enough audio. */ Chris@41: win32_audio_out_callback (0, MM_WOM_DONE, (DWORD) win32_out, 0, 0) ; Chris@41: win32_audio_out_callback (0, MM_WOM_DONE, (DWORD) win32_out, 0, 0) ; Chris@41: Chris@41: /* Wait for playback to finish. The callback notifies us when all Chris@41: ** wave data has been played. Chris@41: */ Chris@41: WaitForSingleObject (win32_out->Event, INFINITE) ; Chris@41: Chris@41: waveOutPause (win32_out->hwave) ; Chris@41: waveOutReset (win32_out->hwave) ; Chris@41: Chris@41: waveOutUnprepareHeader (win32_out->hwave, &(win32_out->whdr [0]), sizeof (WAVEHDR)) ; Chris@41: waveOutUnprepareHeader (win32_out->hwave, &(win32_out->whdr [1]), sizeof (WAVEHDR)) ; Chris@41: Chris@41: waveOutClose (win32_out->hwave) ; Chris@41: win32_out->hwave = 0 ; Chris@41: Chris@41: return ; Chris@41: } /* win32_play */ Chris@41: Chris@41: static void Chris@41: win32_close (AUDIO_OUT *audio_out) Chris@41: { WIN32_AUDIO_OUT *win32_out ; Chris@41: Chris@41: if ((win32_out = (WIN32_AUDIO_OUT*) audio_out) == NULL) Chris@41: { printf ("win32_close : AUDIO_OUT is NULL.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (win32_out->magic != WIN32_MAGIC) Chris@41: { printf ("win32_close : Bad magic number.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: memset (win32_out, 0, sizeof (WIN32_AUDIO_OUT)) ; Chris@41: Chris@41: free (win32_out) ; Chris@41: } /* win32_close */ Chris@41: Chris@41: static DWORD CALLBACK Chris@41: win32_audio_out_callback (HWAVEOUT hwave, UINT msg, DWORD data, DWORD param1, DWORD param2) Chris@41: { WIN32_AUDIO_OUT *win32_out ; Chris@41: int read_count, frame_count, k ; Chris@41: short *sptr ; Chris@41: Chris@41: /* Chris@41: ** I consider this technique of passing a pointer via an integer as Chris@41: ** fundamentally broken but thats the way microsoft has defined the Chris@41: ** interface. Chris@41: */ Chris@41: if ((win32_out = (WIN32_AUDIO_OUT*) data) == NULL) Chris@41: { printf ("win32_audio_out_callback : AUDIO_OUT is NULL.\n") ; Chris@41: return 1 ; Chris@41: } ; Chris@41: Chris@41: if (win32_out->magic != WIN32_MAGIC) Chris@41: { printf ("win32_audio_out_callback : Bad magic number (%d %d).\n", win32_out->magic, WIN32_MAGIC) ; Chris@41: return 1 ; Chris@41: } ; Chris@41: Chris@41: if (msg != MM_WOM_DONE) Chris@41: return 0 ; Chris@41: Chris@41: /* Do the actual audio. */ Chris@41: sample_count = win32_out->bufferlen ; Chris@41: frame_count = sample_count / win32_out->channels ; Chris@41: Chris@41: read_count = win32_out->callback (win32_out->callback_data, win32_out->float_buffer, frame_count) ; Chris@41: Chris@41: sptr = (short*) win32_out->whdr [win32_out->current].lpData ; Chris@41: Chris@41: for (k = 0 ; k < read_count ; k++) Chris@41: sptr [k] = lrint (32767.0 * win32_out->float_buffer [k]) ; Chris@41: Chris@41: if (read_count > 0) Chris@41: { /* Fix buffer length is only a partial block. */ Chris@41: if (read_count * sizeof (short) < win32_out->bufferlen) Chris@41: win32_out->whdr [win32_out->current].dwBufferLength = read_count * sizeof (short) ; Chris@41: Chris@41: /* Queue the WAVEHDR */ Chris@41: waveOutWrite (win32_out->hwave, (LPWAVEHDR) &(win32_out->whdr [win32_out->current]), sizeof (WAVEHDR)) ; Chris@41: } Chris@41: else Chris@41: { /* Stop playback */ Chris@41: waveOutPause (win32_out->hwave) ; Chris@41: Chris@41: SetEvent (win32_out->Event) ; Chris@41: } ; Chris@41: Chris@41: win32_out->current = (win32_out->current + 1) % 2 ; Chris@41: Chris@41: return 0 ; Chris@41: } /* win32_audio_out_callback */ Chris@41: Chris@41: #endif /* Win32 */ Chris@41: Chris@41: /*------------------------------------------------------------------------------ Chris@41: ** Solaris. Chris@41: */ Chris@41: Chris@41: #if (defined (sun) && defined (unix)) /* ie Solaris */ Chris@41: Chris@41: #include Chris@41: #include Chris@41: #include Chris@41: Chris@41: #define SOLARIS_MAGIC MAKE_MAGIC ('S', 'o', 'l', 'a', 'r', 'i', 's', ' ') Chris@41: Chris@41: typedef struct Chris@41: { int magic ; Chris@41: int fd ; Chris@41: int channels ; Chris@41: int samplerate ; Chris@41: } SOLARIS_AUDIO_OUT ; Chris@41: Chris@41: static AUDIO_OUT *solaris_open (int channels, int samplerate) ; Chris@41: static void solaris_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) ; Chris@41: static void solaris_close (AUDIO_OUT *audio_out) ; Chris@41: Chris@41: static AUDIO_OUT * Chris@41: solaris_open (int channels, int samplerate) Chris@41: { SOLARIS_AUDIO_OUT *solaris_out ; Chris@41: audio_info_t audio_info ; Chris@41: int error ; Chris@41: Chris@41: if ((solaris_out = calloc (1, sizeof (SOLARIS_AUDIO_OUT))) == NULL) Chris@41: { perror ("solaris_open : malloc ") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: solaris_out->magic = SOLARIS_MAGIC ; Chris@41: solaris_out->channels = channels ; Chris@41: solaris_out->samplerate = channels ; Chris@41: Chris@41: /* open the audio device - write only, non-blocking */ Chris@41: if ((solaris_out->fd = open ("/dev/audio", O_WRONLY | O_NONBLOCK)) < 0) Chris@41: { perror ("open (/dev/audio) failed") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: /* Retrive standard values. */ Chris@41: AUDIO_INITINFO (&audio_info) ; Chris@41: Chris@41: audio_info.play.sample_rate = samplerate ; Chris@41: audio_info.play.channels = channels ; Chris@41: audio_info.play.precision = 16 ; Chris@41: audio_info.play.encoding = AUDIO_ENCODING_LINEAR ; Chris@41: audio_info.play.gain = AUDIO_MAX_GAIN ; Chris@41: audio_info.play.balance = AUDIO_MID_BALANCE ; Chris@41: Chris@41: if ((error = ioctl (solaris_out->fd, AUDIO_SETINFO, &audio_info))) Chris@41: { perror ("ioctl (AUDIO_SETINFO) failed") ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: return (AUDIO_OUT*) solaris_out ; Chris@41: } /* solaris_open */ Chris@41: Chris@41: static void Chris@41: solaris_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) Chris@41: { SOLARIS_AUDIO_OUT *solaris_out ; Chris@41: static float float_buffer [BUFFER_LEN] ; Chris@41: static short buffer [BUFFER_LEN] ; Chris@41: int k, read_frames ; Chris@41: Chris@41: if ((solaris_out = (SOLARIS_AUDIO_OUT*) audio_out) == NULL) Chris@41: { printf ("solaris_play : AUDIO_OUT is NULL.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (solaris_out->magic != SOLARIS_MAGIC) Chris@41: { printf ("solaris_play : Bad magic number.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: while ((read_frames = callback (callback_data, float_buffer, BUFFER_LEN / solaris_out->channels))) Chris@41: { for (k = 0 ; k < read_frames * solaris_out->channels ; k++) Chris@41: buffer [k] = lrint (32767.0 * float_buffer [k]) ; Chris@41: write (solaris_out->fd, buffer, read_frames * solaris_out->channels * sizeof (short)) ; Chris@41: } ; Chris@41: Chris@41: return ; Chris@41: } /* solaris_play */ Chris@41: Chris@41: static void Chris@41: solaris_close (AUDIO_OUT *audio_out) Chris@41: { SOLARIS_AUDIO_OUT *solaris_out ; Chris@41: Chris@41: if ((solaris_out = (SOLARIS_AUDIO_OUT*) audio_out) == NULL) Chris@41: { printf ("solaris_close : AUDIO_OUT is NULL.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (solaris_out->magic != SOLARIS_MAGIC) Chris@41: { printf ("solaris_close : Bad magic number.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: memset (solaris_out, 0, sizeof (SOLARIS_AUDIO_OUT)) ; Chris@41: Chris@41: free (solaris_out) ; Chris@41: Chris@41: return ; Chris@41: } /* solaris_close */ Chris@41: Chris@41: #endif /* Solaris */ Chris@41: Chris@41: /*============================================================================== Chris@41: ** Main function. Chris@41: */ Chris@41: Chris@41: AUDIO_OUT * Chris@41: audio_open (int channels, int samplerate) Chris@41: { Chris@41: #if defined (__linux__) Chris@41: #if HAVE_ALSA_ASOUNDLIB_H Chris@41: if (access ("/proc/asound/cards", R_OK) == 0) Chris@41: return alsa_open (channels, samplerate) ; Chris@41: #endif Chris@41: return opensoundsys_open (channels, samplerate) ; Chris@41: #elif (defined (__MACH__) && defined (__APPLE__)) Chris@41: return macosx_open (channels, samplerate) ; Chris@41: #elif (defined (sun) && defined (unix)) Chris@41: return solaris_open (channels, samplerate) ; Chris@41: #elif (defined (_WIN32) || defined (WIN32)) Chris@41: return win32_open (channels, samplerate) ; Chris@41: #else Chris@41: #warning "*** Playing sound not yet supported on this platform." Chris@41: #warning "*** Please feel free to submit a patch." Chris@41: printf ("Error : Playing sound not yet supported on this platform.\n") ; Chris@41: return NULL ; Chris@41: #endif Chris@41: Chris@41: Chris@41: return NULL ; Chris@41: } /* audio_open */ Chris@41: Chris@41: void Chris@41: audio_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) Chris@41: { Chris@41: Chris@41: if (callback == NULL) Chris@41: { printf ("Error : bad callback pointer.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (audio_out == NULL) Chris@41: { printf ("Error : bad audio_out pointer.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: if (callback_data == NULL) Chris@41: { printf ("Error : bad callback_data pointer.\n") ; Chris@41: return ; Chris@41: } ; Chris@41: Chris@41: #if defined (__linux__) Chris@41: #if HAVE_ALSA_ASOUNDLIB_H Chris@41: if (audio_out->magic == ALSA_MAGIC) Chris@41: alsa_play (callback, audio_out, callback_data) ; Chris@41: #endif Chris@41: opensoundsys_play (callback, audio_out, callback_data) ; Chris@41: #elif (defined (__MACH__) && defined (__APPLE__)) Chris@41: macosx_play (callback, audio_out, callback_data) ; Chris@41: #elif (defined (sun) && defined (unix)) Chris@41: solaris_play (callback, audio_out, callback_data) ; Chris@41: #elif (defined (_WIN32) || defined (WIN32)) Chris@41: win32_play (callback, audio_out, callback_data) ; Chris@41: #else Chris@41: #warning "*** Playing sound not yet supported on this platform." Chris@41: #warning "*** Please feel free to submit a patch." Chris@41: printf ("Error : Playing sound not yet supported on this platform.\n") ; Chris@41: return ; Chris@41: #endif Chris@41: Chris@41: return ; Chris@41: } /* audio_play */ Chris@41: Chris@41: void Chris@41: audio_close (AUDIO_OUT *audio_out) Chris@41: { Chris@41: #if defined (__linux__) Chris@41: #if HAVE_ALSA_ASOUNDLIB_H Chris@41: if (audio_out->magic == ALSA_MAGIC) Chris@41: alsa_close (audio_out) ; Chris@41: #endif Chris@41: opensoundsys_close (audio_out) ; Chris@41: #elif (defined (__MACH__) && defined (__APPLE__)) Chris@41: macosx_close (audio_out) ; Chris@41: #elif (defined (sun) && defined (unix)) Chris@41: solaris_close (audio_out) ; Chris@41: #elif (defined (_WIN32) || defined (WIN32)) Chris@41: win32_close (audio_out) ; Chris@41: #else Chris@41: #warning "*** Playing sound not yet supported on this platform." Chris@41: #warning "*** Please feel free to submit a patch." Chris@41: printf ("Error : Playing sound not yet supported on this platform.\n") ; Chris@41: return ; Chris@41: #endif Chris@41: Chris@41: return ; Chris@41: } /* audio_close */ Chris@41: Chris@41: #else /* (HAVE_SNDFILE == 0) */ Chris@41: Chris@41: /* Do not have libsndfile installed so just return. */ Chris@41: Chris@41: AUDIO_OUT * Chris@41: audio_open (int channels, int samplerate) Chris@41: { Chris@41: (void) channels ; Chris@41: (void) samplerate ; Chris@41: Chris@41: return NULL ; Chris@41: } /* audio_open */ Chris@41: Chris@41: void Chris@41: audio_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) Chris@41: { Chris@41: (void) callback ; Chris@41: (void) audio_out ; Chris@41: (void) callback_data ; Chris@41: Chris@41: return ; Chris@41: } /* audio_play */ Chris@41: Chris@41: void Chris@41: audio_close (AUDIO_OUT *audio_out) Chris@41: { Chris@41: audio_out = audio_out ; Chris@41: Chris@41: return ; Chris@41: } /* audio_close */ Chris@41: Chris@41: #endif /* HAVE_SNDFILE */ Chris@41: