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| author | Lionel Ulmer | 2002-05-03 19:47:51 +0000 |
|---|---|---|
| committer | Lionel Ulmer | 2002-05-03 19:47:51 +0000 |
| commit | fe54e1caec7f50d5312816af6fb12d46050ca028 (patch) | |
| tree | 0f4436dd8b0374a219c48da85dfbcbd00c118ea4 | |
| parent | 25800dabc379d6ff494e2c35c3b469745e78a022 (diff) | |
| download | scummvm-rg350-fe54e1caec7f50d5312816af6fb12d46050ca028.tar.gz scummvm-rg350-fe54e1caec7f50d5312816af6fb12d46050ca028.tar.bz2 scummvm-rg350-fe54e1caec7f50d5312816af6fb12d46050ca028.zip | |
Remove floating point in the MP3 volume control (baaaaaaaad on PDAs
like the iPAQ where no FPU is present). Instead replace it by a '32
level' volume control.
svn-id: r4184
| -rw-r--r-- | sound/mixer.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sound/mixer.cpp b/sound/mixer.cpp index 5b0be93ee4..e332b22103 100644 --- a/sound/mixer.cpp +++ b/sound/mixer.cpp @@ -291,6 +291,7 @@ static inline int scale_sample(mad_fixed_t sample) void SoundMixer::Channel_MP3::mix(int16 *data, uint len) { mad_fixed_t const *ch; const int16 *vol_tab = _mixer->_volume_table; + unsigned char volume = ((int) vol_tab[1]) * 32 / 255; if (_to_be_destroyed) { real_destroy(); @@ -303,7 +304,7 @@ void SoundMixer::Channel_MP3::mix(int16 *data, uint len) { if (_silence_cut > 0) { _silence_cut--; } else { - *data++ += (int16)((float)scale_sample(*ch++) * ((float)vol_tab[1] / (float)128)); + *data++ += (int16) ((scale_sample(*ch++) * volume) / 32); len--; } _pos_in_frame++; @@ -369,6 +370,7 @@ void SoundMixer::Channel_MP3_CDMUSIC::mix(int16 *data, uint len) { mad_fixed_t const *ch; mad_timer_t frame_duration; const int16 *vol_tab = _mixer->_volume_table; + unsigned char volume = ((int) vol_tab[1]) * 32 / 255; if (_to_be_destroyed) { real_destroy(); @@ -420,7 +422,7 @@ void SoundMixer::Channel_MP3_CDMUSIC::mix(int16 *data, uint len) { // Get samples, play samples ... ch = _synth.pcm.samples[0] + _pos_in_frame; while ((_pos_in_frame < _synth.pcm.length) && (len > 0)) { - *data++ += (int16)((float)scale_sample(*ch++) * ((float)vol_tab[1] / (float)128)); + *data++ += (int16) ((scale_sample(*ch++) * volume) / 32); len--; _pos_in_frame++; } |