Split i_sound.c into i_sdlsound.c, i_sdlmusic.c, with generic "sound

driver" modules, one for PC speaker and one for digital output.

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 913

1 files changed, 0 insertions, 767 deletions

diff --git a/src/i_sound.c b/src/i_sound.c
deleted file mode 100644
index c332c69f..00000000
--- a/src/i_sound.c
+++ /dev/null
@@ -1,767 +0,0 @@
-// Emacs style mode select   -*- C++ -*- 
-//-----------------------------------------------------------------------------
-//
-// Copyright(C) 1993-1996 Id Software, Inc.
-// Copyright(C) 2005 Simon Howard
-//
-// This program 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.
-//
-// This program 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 this program; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-// 02111-1307, USA.
-//
-// DESCRIPTION:
-//	System interface for sound.
-//
-//-----------------------------------------------------------------------------
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "SDL.h"
-#include "SDL_mixer.h"
-
-#ifndef _WIN32
-#include <unistd.h>
-#endif
-
-#include "memio.h"
-#include "mus2mid.h"
-#include "z_zone.h"
-
-#include "i_system.h"
-#include "i_pcsound.h"
-#include "i_sound.h"
-#include "i_swap.h"
-#include "deh_main.h"
-#include "s_sound.h"
-#include "m_argv.h"
-#include "m_misc.h"
-#include "w_wad.h"
-
-#include "doomdef.h"
-
-#define NUM_CHANNELS 16
-
-#define MAXMIDLENGTH (96 * 1024)
-
-static boolean nosfxparm;
-static boolean nomusicparm;
-
-static boolean sound_initialised = false;
-static boolean music_initialised = false;
-
-static Mix_Chunk sound_chunks[NUMSFX];
-static int channels_playing[NUM_CHANNELS];
-
-static int mixer_freq;
-static Uint16 mixer_format;
-static int mixer_channels;
-
-int snd_samplerate = MIX_DEFAULT_FREQUENCY;
-
-// When a sound stops, check if it is still playing.  If it is not, 
-// we can mark the sound data as CACHE to be freed back for other
-// means.
-
-void ReleaseSoundOnChannel(int channel)
-{
-    int i;
-    int id = channels_playing[channel];
-
-    if (!id)
-        return;
-
-    channels_playing[channel] = sfx_None;
-    
-    for (i=0; i<NUM_CHANNELS; ++i)
-    {
-        // Playing on this channel? if so, don't release.
-
-        if (channels_playing[i] == id)
-            return;
-    }
-
-    // Not used on any channel, and can be safely released
-    
-    Z_ChangeTag(sound_chunks[id].abuf, PU_CACHE);
-}
-
-static boolean ConvertibleRatio(int freq1, int freq2)
-{
-    int ratio;
-
-    if (freq1 > freq2)
-    {
-        return ConvertibleRatio(freq2, freq1);
-    }
-    else if ((freq2 % freq1) != 0)
-    {
-        // Not in a direct ratio
-
-        return false;
-    }
-    else
-    {
-        // Check the ratio is a power of 2
-
-        ratio = freq2 / freq1;
-
-        while ((ratio & 1) == 0)
-        {
-            ratio = ratio >> 1;
-        }
-
-        return ratio == 1;
-    }
-}
-
-// Generic sound expansion function for any sample rate
-
-static void ExpandSoundData(byte *data,
-                            int samplerate,
-                            int length,
-                            Mix_Chunk *destination)
-{
-    SDL_AudioCVT convertor;
-    
-    if (samplerate <= mixer_freq
-     && ConvertibleRatio(samplerate, mixer_freq)
-     && SDL_BuildAudioCVT(&convertor,
-                          AUDIO_U8, 1, samplerate,
-                          mixer_format, mixer_channels, mixer_freq))
-    {
-        convertor.buf = destination->abuf;
-        convertor.len = length;
-        memcpy(convertor.buf, data, length);
-
-        SDL_ConvertAudio(&convertor);
-    }
-    else
-    {
-        Sint16 *expanded = (Sint16 *) destination->abuf;
-        int expanded_length;
-        int expand_ratio;
-        int i;
-
-        // Generic expansion if conversion does not work:
-        //
-        // SDL's audio conversion only works for rate conversions that are
-        // powers of 2; if the two formats are not in a direct power of 2
-        // ratio, do this naive conversion instead.
-
-        // number of samples in the converted sound
-
-        expanded_length = (length * mixer_freq) / samplerate;
-        expand_ratio = (length << 8) / expanded_length;
-
-        for (i=0; i<expanded_length; ++i)
-        {
-            Sint16 sample;
-            int src;
-
-            src = (i * expand_ratio) >> 8;
-
-            sample = data[src] | (data[src] << 8);
-            sample -= 32768;
-
-            // expand 8->16 bits, mono->stereo
-
-            expanded[i * 2] = expanded[i * 2 + 1] = sample;
-        }
-    }
-}
-
-// Load and convert a sound effect
-// Returns true if successful
-
-static boolean CacheSFX(int sound)
-{
-    int lumpnum;
-    unsigned int lumplen;
-    int samplerate;
-    unsigned int length;
-    unsigned int expanded_length;
-    byte *data;
-
-    // need to load the sound
-
-    lumpnum = S_sfx[sound].lumpnum;
-    data = W_CacheLumpNum(lumpnum, PU_STATIC);
-    lumplen = W_LumpLength(lumpnum);
-
-    // Check the header, and ensure this is a valid sound
-
-    if (lumplen < 8
-     || data[0] != 0x03 || data[1] != 0x00)
-    {
-        // Invalid sound
-
-        return false;
-    }
-
-    // 16 bit sample rate field, 32 bit length field
-
-    samplerate = (data[3] << 8) | data[2];
-    length = (data[7] << 24) | (data[6] << 16) | (data[5] << 8) | data[4];
-
-    // If the header specifies that the length of the sound is greater than
-    // the length of the lump itself, this is an invalid sound lump
-
-    if (length - 8 > lumplen)
-    {
-        return false;
-    }
-
-    expanded_length = (uint32_t) ((((uint64_t) length) * 4 * mixer_freq) / samplerate);
-
-    sound_chunks[sound].allocated = 1;
-    sound_chunks[sound].alen = expanded_length;
-    sound_chunks[sound].abuf 
-        = Z_Malloc(expanded_length, PU_STATIC, &sound_chunks[sound].abuf);
-    sound_chunks[sound].volume = MIX_MAX_VOLUME;
-
-    ExpandSoundData(data + 8, 
-                    samplerate, 
-                    length - 8, 
-                    &sound_chunks[sound]);
-
-    // don't need the original lump any more
-  
-    Z_ChangeTag(data, PU_CACHE);
-
-    return true;
-}
-
-static Mix_Chunk *GetSFXChunk(int sound_id)
-{
-    if (sound_chunks[sound_id].abuf == NULL)
-    {
-        if (!CacheSFX(sound_id))
-            return NULL;
-    }
-    else
-    {
-        // don't free the sound while it is playing!
-   
-        Z_ChangeTag(sound_chunks[sound_id].abuf, PU_STATIC);
-    }
-
-    return &sound_chunks[sound_id];
-}
-
-
-//
-// Retrieve the raw data lump index
-//  for a given SFX name.
-//
-
-int I_GetSfxLumpNum(sfxinfo_t* sfx)
-{
-    char namebuf[9];
-    char *prefix;
-
-    // Different prefix for PC speaker sound effects.
-
-    if (snd_sfxdevice == SNDDEVICE_PCSPEAKER)
-    {
-        prefix = "dp";
-    }
-    else
-    {
-        prefix = "ds";
-    }
-
-    sprintf(namebuf, "%s%s", prefix, DEH_String(sfx->name));
-    
-    return W_GetNumForName(namebuf);
-}
-
-//
-// Starting a sound means adding it
-//  to the current list of active sounds
-//  in the internal channels.
-// As the SFX info struct contains
-//  e.g. a pointer to the raw data,
-//  it is ignored.
-// As our sound handling does not handle
-//  priority, it is ignored.
-// Pitching (that is, increased speed of playback)
-//  is set, but currently not used by mixing.
-//
-
-int
-I_StartSound
-( int		id,
-  int           channel,
-  int		vol,
-  int		sep,
-  int		pitch,
-  int		priority )
-{
-    Mix_Chunk *chunk;
-
-    if (!sound_initialised)
-        return 0;
-
-    if (snd_sfxdevice == SNDDEVICE_PCSPEAKER)
-    {
-        return I_PCS_StartSound(id, channel, vol, sep, pitch, priority);
-    }
-
-    // Release a sound effect if there is already one playing
-    // on this channel
-
-    ReleaseSoundOnChannel(channel);
-
-    // Get the sound data
-
-    chunk = GetSFXChunk(id);
-
-    if (chunk == NULL)
-    {
-        return -1;
-    }
-
-    // play sound
-
-    Mix_PlayChannelTimed(channel, chunk, 0, -1);
-
-    channels_playing[channel] = id;
-
-    // set separation, etc.
- 
-    I_UpdateSoundParams(channel, vol, sep, pitch);
-
-    return channel;
-}
-
-void I_StopSound (int handle)
-{
-    if (!sound_initialised)
-        return;
-
-    if (snd_sfxdevice == SNDDEVICE_PCSPEAKER)
-    {
-        I_PCS_StopSound(handle);
-        return;
-    }
-    
-    Mix_HaltChannel(handle);
-
-    // Sound data is no longer needed; release the
-    // sound data being used for this channel
-
-    ReleaseSoundOnChannel(handle);
-}
-
-
-int I_SoundIsPlaying(int handle)
-{
-    if (!sound_initialised) 
-        return false;
-
-    if (handle < 0)
-        return false;
-
-    if (snd_sfxdevice == SNDDEVICE_PCSPEAKER)
-    {
-        return I_PCS_SoundIsPlaying(handle);
-    }
-    else
-    {
-        return Mix_Playing(handle);
-    }
-}
-
-
-
-
-// 
-// Periodically called to update the sound system
-//
-
-void I_UpdateSound( void )
-{
-    int i;
-
-    if (!sound_initialised)
-        return;
-
-    if (snd_sfxdevice == SNDDEVICE_PCSPEAKER)
-    {
-        return;
-    }
-
-    // Check all channels to see if a sound has finished
-
-    for (i=0; i<NUM_CHANNELS; ++i)
-    {
-        if (channels_playing[i] && !I_SoundIsPlaying(i))
-        {
-            // Sound has finished playing on this channel,
-            // but sound data has not been released to cache
-            
-            ReleaseSoundOnChannel(i);
-        }
-    }
-}
-
-
-// 
-// This would be used to write out the mixbuffer
-//  during each game loop update.
-// Updates sound buffer and audio device at runtime. 
-// It is called during Timer interrupt with SNDINTR.
-// Mixing now done synchronous, and
-//  only output be done asynchronous?
-//
-void
-I_SubmitSound(void)
-{
-}
-
-
-
-void 
-I_UpdateSoundParams
-( int	handle,
-  int	vol,
-  int	sep,
-  int	pitch)
-{
-    int left, right;
-
-    if (!sound_initialised)
-        return;
-
-    if (snd_sfxdevice == SNDDEVICE_PCSPEAKER)
-    {
-        return;
-    }
-
-    left = ((254 - sep) * vol) / 127;
-    right = ((sep) * vol) / 127;
-
-    Mix_SetPanning(handle, left, right);
-}
-
-
-
-
-void I_ShutdownSound(void)
-{    
-    if (!sound_initialised && !music_initialised)
-        return;
-
-    Mix_HaltMusic();
-    Mix_CloseAudio();
-    SDL_QuitSubSystem(SDL_INIT_AUDIO);
-
-    sound_initialised = false;
-    music_initialised = false;
-}
-
-
-
-void
-I_InitSound()
-{ 
-    int i;
-    
-    // No sounds yet
-
-    for (i=0; i<NUMSFX; ++i)
-    {
-        sound_chunks[i].abuf = NULL;
-    }
-
-    for (i=0; i<NUM_CHANNELS; ++i)
-    {
-        channels_playing[i] = sfx_None;
-    }
-
-    //! 
-    // Disable music playback.
-    //
-
-    nomusicparm = M_CheckParm("-nomusic") > 0;
-
-    if (snd_musicdevice < SNDDEVICE_ADLIB)
-    {
-        nomusicparm = true;
-    }
- 
-    //!
-    // Disable sound effects.
-    //
-
-    nosfxparm = M_CheckParm("-nosfx") > 0;
-
-    // If the SFX device is 0 (none), then disable sound effects,
-    // just like if we specified -nosfx.  However, we still continue
-    // with initialising digital sound output even if we are using
-    // the PC speaker, because we might be using the SDL PC speaker
-    // emulation.
-
-    if (snd_sfxdevice == SNDDEVICE_NONE)
-    {
-        nosfxparm = true;
-    }
-
-    //!
-    // Disable sound effects and music.
-    //
-
-    if (M_CheckParm("-nosound") > 0)
-    {
-        nosfxparm = true;
-        nomusicparm = true;
-    }
-
-    // When trying to run with music enabled on OSX, display
-    // a warning message.
-
-#ifdef __MACOSX__
-    if (!nomusicparm)
-    {
-        printf("\n"
-               "                   *** WARNING ***\n"
-               "      Music playback on OSX may cause crashes and\n"
-               "      is disabled by default.\n"
-               "\n");
-    }
-#endif
-
-    // If music or sound is going to play, we need to at least
-    // initialise SDL
-    // No sound in screensaver mode.
-
-    if (screensaver_mode || (nomusicparm && nosfxparm))
-        return;
-
-    if (SDL_Init(SDL_INIT_AUDIO) < 0)
-    {
-        fprintf(stderr, "Unable to set up sound.\n");
-        return;
-    }
-
-    if (Mix_OpenAudio(snd_samplerate, AUDIO_S16SYS, 2, 1024) < 0)
-    {
-        fprintf(stderr, "Error initialising SDL_mixer: %s\n", Mix_GetError());
-        return;
-    }
-
-    Mix_QuerySpec(&mixer_freq, &mixer_format, &mixer_channels);
-
-    Mix_AllocateChannels(NUM_CHANNELS);
-    
-    SDL_PauseAudio(0);
-
-    // If we are using the PC speaker, we now need to initialise it.
-
-    if (snd_sfxdevice == SNDDEVICE_PCSPEAKER)
-    {
-        I_PCS_InitSound();
-    }
-
-    if (!nomusicparm)
-        music_initialised = true;
-
-    if (!nosfxparm)
-        sound_initialised = true;
-}
-
-
-
-
-//
-// MUSIC API.
-//
-
-static boolean  musicpaused = false;
-static int currentMusicVolume;
-
-//
-// SDL_mixer's native MIDI music playing does not pause properly.
-// As a workaround, set the volume to 0 when paused.
-//
-
-static void UpdateMusicVolume(void)
-{
-    int vol;
-
-    if (musicpaused)
-        vol = 0;
-    else
-        vol = (currentMusicVolume * MIX_MAX_VOLUME) / 127;
-
-    Mix_VolumeMusic(vol);
-}
-
-// MUSIC API - dummy. Some code from DOS version.
-void I_SetMusicVolume(int volume)
-{
-    // Internal state variable.
-    currentMusicVolume = volume;
-
-    UpdateMusicVolume();
-}
-
-void I_PlaySong(void *handle, int looping)
-{
-    Mix_Music *music = (Mix_Music *) handle;
-    int loops;
-
-    if (!music_initialised)
-        return;
-
-    if (handle == NULL)
-        return;
-
-    if (looping)
-        loops = -1;
-    else
-        loops = 1;
-
-    Mix_PlayMusic(music, loops);
-}
-
-void I_PauseSong (void *handle)
-{
-    if (!music_initialised)
-        return;
-
-    musicpaused = true;
-
-    UpdateMusicVolume();
-}
-
-void I_ResumeSong (void *handle)
-{
-    if (!music_initialised)
-        return;
-
-    musicpaused = false;
-
-    UpdateMusicVolume();
-}
-
-void I_StopSong(void *handle)
-{
-    if (!music_initialised)
-        return;
-
-    Mix_HaltMusic();
-}
-
-void I_UnRegisterSong(void *handle)
-{
-    Mix_Music *music = (Mix_Music *) handle;
-
-    if (!music_initialised)
-        return;
-
-    if (handle == NULL)
-        return;
-
-    Mix_FreeMusic(music);
-}
-
-// Determine whether memory block is a .mid file 
-
-static boolean IsMid(byte *mem, int len)
-{
-    return len > 4 && !memcmp(mem, "MThd", 4);
-}
-
-static boolean ConvertMus(byte *musdata, int len, char *filename)
-{
-    MEMFILE *instream;
-    MEMFILE *outstream;
-    void *outbuf;
-    size_t outbuf_len;
-    int result;
-
-    instream = mem_fopen_read(musdata, len);
-    outstream = mem_fopen_write();
-
-    result = mus2mid(instream, outstream);
-
-    if (result == 0)
-    {
-        mem_get_buf(outstream, &outbuf, &outbuf_len);
-
-        M_WriteFile(filename, outbuf, outbuf_len);
-    }
-
-    mem_fclose(instream);
-    mem_fclose(outstream);
-
-    return result;
-}
-
-void *I_RegisterSong(void *data, int len)
-{
-    char *filename;
-    Mix_Music *music;
-
-    if (!music_initialised)
-        return NULL;
-    
-    // MUS files begin with "MUS"
-    // Reject anything which doesnt have this signature
-    
-    filename = M_TempFile("doom.mid");
-
-    if (IsMid(data, len) && len < MAXMIDLENGTH)
-    {
-        M_WriteFile(filename, data, len);
-    }
-    else 
-    {
-	// Assume a MUS file and try to convert
-
-        ConvertMus(data, len, filename);
-    }
-
-    // Load the MIDI
-
-    music = Mix_LoadMUS(filename);
-    
-    if (music == NULL)
-    {
-        // Failed to load
-
-        fprintf(stderr, "Error loading midi: %s\n", Mix_GetError());
-    }
-
-    // remove file now
-
-    remove(filename);
-
-    Z_Free(filename);
-
-    return music;
-}
-
-// Is the song playing?
-boolean I_QrySongPlaying(void *handle)
-{
-    if (!music_initialised)
-        return false;
-
-    return Mix_PlayingMusic();
-}
-
-
-