From f13662d83b34ec1a6add839ed160eeb7c4296496 Mon Sep 17 00:00:00 2001 From: Holger Schemel Date: Sat, 27 Apr 2002 19:42:55 +0200 Subject: [PATCH] rnd-20020427-5-src --- src/libgame/sound.c | 123 ++++++++++++++++++++++++++++---------------- src/libgame/sound.h | 13 +++++ 2 files changed, 91 insertions(+), 45 deletions(-) diff --git a/src/libgame/sound.c b/src/libgame/sound.c index 30416a90..7858f1f5 100644 --- a/src/libgame/sound.c +++ b/src/libgame/sound.c @@ -32,6 +32,11 @@ static int num_sounds = 0, num_music = 0; /* ========================================================================= */ /* THE STUFF BELOW IS ONLY USED BY THE SOUND SERVER CHILD PROCESS */ +static struct AudioFormatInfo afmt = +{ + TRUE, 0, DEFAULT_AUDIO_SAMPLE_RATE, DEFAULT_AUDIO_FRAGMENT_SIZE +}; + static int playing_sounds = 0; static struct SoundControl playlist[MAX_SOUNDS_PLAYING]; static struct SoundControl emptySoundControl = @@ -53,9 +58,9 @@ static byte playing_buffer[SND_BLOCKSIZE]; /* forward declaration of internal functions */ #if defined(AUDIO_STREAMING_DSP) static void SoundServer_InsertNewSound(struct SoundControl); -static boolean InitAudioDevice_DSP(int, int); +static void InitAudioDevice_DSP(struct AudioFormatInfo *); #elif defined(PLATFORM_HPUX) -static boolean InitAudioDevice_HPUX(); +static void InitAudioDevice_HPUX(struct AudioFormatInfo *); #elif defined(PLATFORM_UNIX) static unsigned char linear_to_ulaw(int); static int ulaw_to_linear(unsigned char); @@ -204,7 +209,7 @@ void SoundServer(void) (int)sqrt((float)(PSND_MAX_LEFT2RIGHT * PSND_MAX_LEFT2RIGHT - i * i)); #if defined(PLATFORM_HPUX) - InitAudioDevice_HPUX(); + InitAudioDevice_HPUX(&afmt); #endif FD_ZERO(&sound_fdset); @@ -341,12 +346,9 @@ void SoundServer(void) (audio.device_fd = OpenAudioDevice(audio.device_name)) >= 0) { struct timeval delay = { 0, 0 }; - static int fragment_size = DEFAULT_AUDIO_FRAGMENT_SIZE; - int sample_rate = DEFAULT_AUDIO_SAMPLE_RATE; - static boolean stereo = TRUE; if (!playing_sounds) /* we just opened the audio device */ - stereo = InitAudioDevice_DSP(fragment_size, sample_rate); + InitAudioDevice_DSP(&afmt); if (snd_ctrl.active) /* new sound has arrived */ SoundServer_InsertNewSound(snd_ctrl); @@ -358,10 +360,13 @@ void SoundServer(void) short *sample_ptr; int sample_size; int max_sample_size; + int fragment_size = afmt.fragment_size; + int sample_bytes = (afmt.format & AUDIO_FORMAT_U8 ? 1 : 2); + boolean stereo = afmt.stereo; FD_SET(audio.soundserver_pipe[0], &sound_fdset); - max_sample_size = fragment_size / ((stereo ? 2 : 1) * sizeof(short)); + max_sample_size = fragment_size / ((stereo ? 2 : 1) * sample_bytes); /* first clear the last premixing buffer */ memset(premix_last_buffer, 0, @@ -450,7 +455,7 @@ void SoundServer(void) } } - /* put last mixing buffer to final playing buffer */ + /* prepare final playing buffer according to system audio format */ for(i=0; i>= 1; - /* fill playing buffer for "signed 16 bit little endian" audio - format (independently of endianess of "short" integer type) */ - playing_buffer[2 * i + 0] = premix_last_buffer[i] & 0xff; - playing_buffer[2 * i + 1] = premix_last_buffer[i] >> 8; + if (afmt.format & AUDIO_FORMAT_U8) + { + playing_buffer[i] = (premix_last_buffer[i] >> 8) ^ 0x80; + } + else if (afmt.format & AUDIO_FORMAT_LE) /* 16 bit */ + { + playing_buffer[2 * i + 0] = premix_last_buffer[i] & 0xff; + playing_buffer[2 * i + 1] = premix_last_buffer[i] >> 8; + } + else /* big endian */ + { + playing_buffer[2 * i + 0] = premix_last_buffer[i] >> 8; + playing_buffer[2 * i + 1] = premix_last_buffer[i] & 0xff; + } } /* finally play the sound fragment */ @@ -789,17 +804,31 @@ static void SoundServer_StopAllSounds() /* ------------------------------------------------------------------------- */ #if defined(AUDIO_LINUX_IOCTL) -static boolean InitAudioDevice_Linux(int fragment_size, int sample_rate) +static void InitAudioDevice_Linux(struct AudioFormatInfo *afmt) { /* "ioctl()" expects pointer to 'int' value for stereo flag (boolean is defined as 'char', which will not work here) */ unsigned int fragment_spec = 0; - unsigned int audio_format = 0; int fragment_size_query; int stereo = TRUE; + struct + { + int format_ioctl; + int format_result; + } + formats[] = + { + /* supported audio format in preferred order */ + { AFMT_S16_LE, AUDIO_FORMAT_S16 | AUDIO_FORMAT_LE }, + { AFMT_S16_BE, AUDIO_FORMAT_S16 | AUDIO_FORMAT_BE }, + { AFMT_U8, AUDIO_FORMAT_U8 }, + { -1, -1 } + }; + int i; /* determine logarithm (log2) of the fragment size */ - for (fragment_spec=0; (1 << fragment_spec) < fragment_size; fragment_spec++); + while ((1 << fragment_spec) < afmt->fragment_size) + fragment_spec++; /* use two fragments (play one fragment, prepare the other); one fragment would result in interrupted audio output, more @@ -815,27 +844,28 @@ static boolean InitAudioDevice_Linux(int fragment_size, int sample_rate) Error(ERR_EXIT_SOUND_SERVER, "cannot set fragment size of /dev/dsp -- no sounds"); - audio_format = AFMT_S16_LE; - if (ioctl(audio.device_fd, SNDCTL_DSP_SETFMT, &audio_format) < 0) + i = 0; + afmt->format = 0; + while (formats[i].format_result != -1) + { + unsigned int audio_format = formats[i].format_ioctl; + if (ioctl(audio.device_fd, SNDCTL_DSP_SETFMT, &audio_format) == 0) + { + afmt->format = formats[i].format_result; + break; + } + } + + if (afmt->format == 0) /* no supported audio format found */ Error(ERR_EXIT_SOUND_SERVER, "cannot set audio format of /dev/dsp -- no sounds"); /* try if we can use stereo sound */ + afmt->stereo = TRUE; if (ioctl(audio.device_fd, SNDCTL_DSP_STEREO, &stereo) < 0) - { -#ifdef DEBUG - static boolean reported = FALSE; - - if (!reported) - { - Error(ERR_RETURN, "cannot get stereo sound on /dev/dsp"); - reported = TRUE; - } -#endif - stereo = FALSE; - } + afmt->stereo = FALSE; - if (ioctl(audio.device_fd, SNDCTL_DSP_SPEED, &sample_rate) < 0) + if (ioctl(audio.device_fd, SNDCTL_DSP_SPEED, &afmt->sample_rate) < 0) Error(ERR_EXIT_SOUND_SERVER, "cannot set sample rate of /dev/dsp -- no sounds"); @@ -843,16 +873,14 @@ static boolean InitAudioDevice_Linux(int fragment_size, int sample_rate) if (ioctl(audio.device_fd, SNDCTL_DSP_GETBLKSIZE, &fragment_size_query) < 0) Error(ERR_EXIT_SOUND_SERVER, "cannot get fragment size of /dev/dsp -- no sounds"); - if (fragment_size_query != fragment_size) + if (fragment_size_query != afmt->fragment_size) Error(ERR_EXIT_SOUND_SERVER, "cannot set fragment size of /dev/dsp -- no sounds"); - - return (boolean)stereo; } #endif /* AUDIO_LINUX_IOCTL */ #if defined(PLATFORM_NETBSD) -static boolean InitAudioDevice_NetBSD(int fragment_size, int sample_rate) +static void InitAudioDevice_NetBSD(struct AudioFormatInfo *afmt) { audio_info_t a_info; boolean stereo = TRUE; @@ -864,23 +892,25 @@ static boolean InitAudioDevice_NetBSD(int fragment_size, int sample_rate) a_info.play.sample_rate = sample_rate; a_info.blocksize = fragment_size; + afmt->format = AUDIO_FORMAT_U8; + afmt->stereo = TRUE; + if (ioctl(audio.device_fd, AUDIO_SETINFO, &a_info) < 0) { /* try to disable stereo */ a_info.play.channels = 1; - stereo = FALSE; + + afmt->stereo = FALSE; if (ioctl(audio.device_fd, AUDIO_SETINFO, &a_info) < 0) Error(ERR_EXIT_SOUND_SERVER, "cannot set sample rate of /dev/audio -- no sounds"); } - - return stereo; } #endif /* PLATFORM_NETBSD */ #if defined(PLATFORM_HPUX) -static boolean InitAudioDevice_HPUX() +static void InitAudioDevice_HPUX(struct AudioFormatInfo *afmt) { struct audio_describe ainfo; int audio_ctl; @@ -898,21 +928,23 @@ static boolean InitAudioDevice_HPUX() ioctl(audio_ctl, AUDIO_SET_CHANNELS, 1); ioctl(audio_ctl, AUDIO_SET_SAMPLE_RATE, 8000); - close(audio_ctl); + afmt->format = AUDIO_FORMAT_U8; + afmt->stereo = FALSE; + afmt->sample_rate = 8000; - return TRUE; /* to provide common interface for InitAudioDevice_...() */ + close(audio_ctl); } #endif /* PLATFORM_HPUX */ #if defined(PLATFORM_UNIX) -static boolean InitAudioDevice_DSP(int fragment_size, int sample_rate) +static void InitAudioDevice_DSP(struct AudioFormatInfo *afmt) { #if defined(AUDIO_LINUX_IOCTL) - return InitAudioDevice_Linux(fragment_size, sample_rate); + InitAudioDevice_Linux(afmt); #elif defined(PLATFORM_NETBSD) - return InitAudioDevice_NetBSD(fragment_size, sample_rate); + InitAudioDevice_NetBSD(afmt); #elif defined(PLATFORM_HPUX) - return InitAudioDevice_HPUX(); + InitAudioDevice_HPUX(afmt); #endif } #endif /* PLATFORM_UNIX */ @@ -1332,6 +1364,7 @@ void PlaySoundExt(int nr, int volume, int stereo, boolean loop_type) snd_ctrl.active = TRUE; #if 0 + /* now only used internally in sound server child process */ snd_ctrl.data_ptr = Sound[nr].data_ptr; snd_ctrl.data_len = Sound[nr].data_len; #endif diff --git a/src/libgame/sound.h b/src/libgame/sound.h index 63cab336..3986194e 100644 --- a/src/libgame/sound.h +++ b/src/libgame/sound.h @@ -55,6 +55,11 @@ #define AUDIO_MONO_CHANNEL 1 #define AUDIO_STEREO_CHANNELS 2 +#define AUDIO_FORMAT_U8 (1 << 0) +#define AUDIO_FORMAT_S16 (1 << 1) +#define AUDIO_FORMAT_LE (1 << 2) +#define AUDIO_FORMAT_BE (1 << 3) + #if defined(TARGET_SDL) /* one second fading interval == 1000 ticks (milliseconds) */ #define SOUND_FADING_INTERVAL 1000 @@ -179,6 +184,14 @@ struct SoundHeader_8SVX }; #endif +struct AudioFormatInfo +{ + boolean stereo; /* availability of stereo sound */ + int format; /* size and endianess of sample data */ + int sample_rate; /* sample frequency */ + int fragment_size; /* audio device fragment size in bytes */ +}; + struct SampleInfo { int type; -- 2.34.1