257 lines
6.9 KiB
C++
257 lines
6.9 KiB
C++
/* $Id$ */
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/** @file sound.cpp Handling of playing sounds. */
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#include "stdafx.h"
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#include "landscape.h"
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#include "mixer.h"
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#include "fileio_func.h"
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#include "newgrf_sound.h"
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#include "fios.h"
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#include "window_gui.h"
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#include "map_func.h"
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#include "vehicle_base.h"
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#include "debug.h"
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static uint _file_count;
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static FileEntry *_files;
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MusicFileSettings msf;
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/* Number of levels of panning per side */
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#define PANNING_LEVELS 16
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/** The number of sounds in the original sample.cat */
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static const uint ORIGINAL_SAMPLE_COUNT = 73;
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static void OpenBankFile(const char *filename)
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{
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FileEntry *fe = CallocT<FileEntry>(ORIGINAL_SAMPLE_COUNT);
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_file_count = ORIGINAL_SAMPLE_COUNT;
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_files = fe;
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FioOpenFile(SOUND_SLOT, filename);
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size_t pos = FioGetPos();
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uint count = FioReadDword() / 8;
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/* Simple check for the correct number of original sounds. */
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if (count != ORIGINAL_SAMPLE_COUNT) {
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/* Corrupt sample data? Just leave the allocated memory as those tell
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* there is no sound to play (size = 0 due to calloc). Not allocating
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* the memory disables valid NewGRFs that replace sounds. */
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DEBUG(misc, 6, "Incorrect number of sounds in '%s', ignoring.", filename);
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return;
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}
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FioSeekTo(pos, SEEK_SET);
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for (uint i = 0; i != ORIGINAL_SAMPLE_COUNT; i++) {
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fe[i].file_slot = SOUND_SLOT;
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fe[i].file_offset = FioReadDword() + pos;
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fe[i].file_size = FioReadDword();
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}
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for (uint i = 0; i != ORIGINAL_SAMPLE_COUNT; i++, fe++) {
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char name[255];
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FioSeekTo(fe->file_offset, SEEK_SET);
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/* Check for special case, see else case */
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FioReadBlock(name, FioReadByte()); // Read the name of the sound
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if (strcmp(name, "Corrupt sound") != 0) {
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FioSeekTo(12, SEEK_CUR); // Skip past RIFF header
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/* Read riff tags */
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for (;;) {
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uint32 tag = FioReadDword();
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uint32 size = FioReadDword();
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if (tag == ' tmf') {
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FioReadWord(); // wFormatTag
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fe->channels = FioReadWord(); // wChannels
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FioReadDword(); // samples per second
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fe->rate = 11025; // seems like all samples should be played at this rate.
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FioReadDword(); // avg bytes per second
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FioReadWord(); // alignment
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fe->bits_per_sample = FioReadByte(); // bits per sample
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FioSeekTo(size - (2 + 2 + 4 + 4 + 2 + 1), SEEK_CUR);
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} else if (tag == 'atad') {
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fe->file_size = size;
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fe->file_slot = SOUND_SLOT;
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fe->file_offset = FioGetPos();
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break;
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} else {
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fe->file_size = 0;
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break;
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}
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}
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} else {
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/*
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* Special case for the jackhammer sound
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* (name in sample.cat is "Corrupt sound")
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* It's no RIFF file, but raw PCM data
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*/
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fe->channels = 1;
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fe->rate = 11025;
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fe->bits_per_sample = 8;
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fe->file_slot = SOUND_SLOT;
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fe->file_offset = FioGetPos();
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}
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}
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}
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uint GetNumOriginalSounds()
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{
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return _file_count;
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}
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static bool SetBankSource(MixerChannel *mc, const FileEntry *fe)
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{
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assert(fe != NULL);
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if (fe->file_size == 0) return false;
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int8 *mem = MallocT<int8>(fe->file_size);
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FioSeekToFile(fe->file_slot, fe->file_offset);
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FioReadBlock(mem, fe->file_size);
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for (uint i = 0; i != fe->file_size; i++) {
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mem[i] += -128; // Convert unsigned sound data to signed
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}
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assert(fe->bits_per_sample == 8 && fe->channels == 1 && fe->file_size != 0 && fe->rate != 0);
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MxSetChannelRawSrc(mc, mem, fe->file_size, fe->rate, MX_AUTOFREE);
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return true;
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}
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bool SoundInitialize(const char *filename)
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{
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OpenBankFile(filename);
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return true;
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}
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/* Low level sound player */
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static void StartSound(uint sound, int panning, uint volume)
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{
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if (volume == 0) return;
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const FileEntry *fe = GetSound(sound);
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if (fe == NULL) return;
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MixerChannel *mc = MxAllocateChannel();
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if (mc == NULL) return;
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if (!SetBankSource(mc, fe)) return;
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/* Apply the sound effect's own volume. */
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volume = (fe->volume * volume) / 128;
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panning = Clamp(panning, -PANNING_LEVELS, PANNING_LEVELS);
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uint left_vol = (volume * PANNING_LEVELS) - (volume * panning);
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uint right_vol = (volume * PANNING_LEVELS) + (volume * panning);
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MxSetChannelVolume(mc, left_vol * 128 / PANNING_LEVELS, right_vol * 128 / PANNING_LEVELS);
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MxActivateChannel(mc);
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}
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static const byte _vol_factor_by_zoom[] = {255, 190, 134, 87};
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assert_compile(lengthof(_vol_factor_by_zoom) == ZOOM_LVL_COUNT);
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static const byte _sound_base_vol[] = {
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128, 90, 128, 128, 128, 128, 128, 128,
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128, 90, 90, 128, 128, 128, 128, 128,
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128, 128, 128, 80, 128, 128, 128, 128,
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128, 128, 128, 128, 128, 128, 128, 128,
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128, 128, 90, 90, 90, 128, 90, 128,
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128, 90, 128, 128, 128, 90, 128, 128,
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128, 128, 128, 128, 90, 128, 128, 128,
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128, 90, 128, 128, 128, 128, 128, 128,
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128, 128, 90, 90, 90, 128, 128, 128,
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90,
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};
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static const byte _sound_idx[] = {
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2, 3, 4, 5, 6, 7, 8, 9,
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10, 11, 12, 13, 14, 15, 16, 17,
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18, 19, 20, 21, 22, 23, 24, 25,
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26, 27, 28, 29, 30, 31, 32, 33,
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34, 35, 36, 37, 38, 39, 40, 0,
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1, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55,
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56, 57, 58, 59, 60, 61, 62, 63,
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64, 65, 66, 67, 68, 69, 70, 71,
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72,
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};
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void SndCopyToPool()
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{
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for (uint i = 0; i < _file_count; i++) {
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FileEntry *orig = &_files[_sound_idx[i]];
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FileEntry *fe = AllocateFileEntry();
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*fe = *orig;
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fe->volume = _sound_base_vol[i];
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fe->priority = 0;
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}
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}
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/**
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* Decide 'where' (between left and right speaker) to play the sound effect.
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* @param sound Sound effect to play
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* @param left Left edge of virtual coordinates where the sound is produced
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* @param right Right edge of virtual coordinates where the sound is produced
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* @param top Top edge of virtual coordinates where the sound is produced
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* @param bottom Bottom edge of virtual coordinates where the sound is produced
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*/
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static void SndPlayScreenCoordFx(SoundFx sound, int left, int right, int top, int bottom)
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{
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if (msf.effect_vol == 0) return;
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const Window *w;
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FOR_ALL_WINDOWS_FROM_BACK(w) {
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const ViewPort *vp = w->viewport;
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if (vp != NULL &&
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left < vp->virtual_left + vp->virtual_width && right > vp->virtual_left &&
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top < vp->virtual_top + vp->virtual_height && bottom > vp->virtual_top) {
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int screen_x = (left + right) / 2 - vp->virtual_left;
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int width = (vp->virtual_width == 0 ? 1 : vp->virtual_width);
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int panning = (screen_x * PANNING_LEVELS * 2) / width - PANNING_LEVELS;
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StartSound(
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sound,
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panning,
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(msf.effect_vol * _vol_factor_by_zoom[vp->zoom - ZOOM_LVL_BEGIN]) / 256
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);
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return;
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}
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}
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}
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void SndPlayTileFx(SoundFx sound, TileIndex tile)
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{
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/* emits sound from center of the tile */
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int x = min(MapMaxX() - 1, TileX(tile)) * TILE_SIZE + TILE_SIZE / 2;
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int y = min(MapMaxY() - 1, TileY(tile)) * TILE_SIZE - TILE_SIZE / 2;
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uint z = (y < 0 ? 0 : GetSlopeZ(x, y));
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Point pt = RemapCoords(x, y, z);
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y += 2 * TILE_SIZE;
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Point pt2 = RemapCoords(x, y, GetSlopeZ(x, y));
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SndPlayScreenCoordFx(sound, pt.x, pt2.x, pt.y, pt2.y);
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}
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void SndPlayVehicleFx(SoundFx sound, const Vehicle *v)
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{
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SndPlayScreenCoordFx(sound,
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v->coord.left, v->coord.right,
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v->coord.top, v->coord.bottom
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);
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}
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void SndPlayFx(SoundFx sound)
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{
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StartSound(sound, 0, msf.effect_vol);
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}
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