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ZVISION: Boost volume for MPEG cutscenes

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The high-resolution videos play back at much lower volume than the
original ones. This adds hard-coded values for how much to amplify
each cutscene. It's all done by ear, and it does introduce some
clipping, but I think it should be acceptable.

Of course, it could also be a problem with the audio decoder, so
this may be the wrong approach entirely.
This commit is contained in:
Torbjörn Andersson 2019-01-18 19:19:25 +01:00 • committed by Filippos Karapetis
parent 82a1859ad1
commit 9785d5007a
5 changed files with 116 additions and 16 deletions
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9
video/mpegps_decoder.cpp
View file

@ -50,7 +50,8 @@ enum {
kStartCodePrivateStream2 = 0x1BF
};
MPEGPSDecoder::MPEGPSDecoder() {
MPEGPSDecoder::MPEGPSDecoder(double decibel) {
_decibel = decibel;
_demuxer = new MPEGPSDemuxer();
}
@ -104,7 +105,7 @@ MPEGPSDecoder::MPEGStream *MPEGPSDecoder::getStream(uint32 startCode, Common::Se
#ifdef USE_A52
handled = true;
AC3AudioTrack *ac3Track = new AC3AudioTrack(*packet, getSoundType());
AC3AudioTrack *ac3Track = new AC3AudioTrack(*packet, _decibel, getSoundType());
stream = ac3Track;
_streamMap[startCode] = ac3Track;
addTrack(ac3Track);
@ -704,9 +705,9 @@ Audio::AudioStream *MPEGPSDecoder::MPEGAudioTrack::getAudioStream() const {
#ifdef USE_A52
MPEGPSDecoder::AC3AudioTrack::AC3AudioTrack(Common::SeekableReadStream &firstPacket, Audio::Mixer::SoundType soundType) :
MPEGPSDecoder::AC3AudioTrack::AC3AudioTrack(Common::SeekableReadStream &firstPacket, double decibel, Audio::Mixer::SoundType soundType) :
AudioTrack(soundType) {
_audStream = Audio::makeAC3Stream(firstPacket);
_audStream = Audio::makeAC3Stream(firstPacket, decibel);
if (!_audStream)
error("Could not create AC-3 stream");
}