Mercurial > SDL_sound_CoreAudio
diff alt_audio_convert.c @ 347:778cee61e1be
Mono-to-stereo fixes, more fprintf debugging output.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Thu, 23 May 2002 12:37:13 +0000 |
parents | fbbb1f25b944 |
children | c984aa6990f7 |
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--- a/alt_audio_convert.c Thu May 23 12:36:50 2002 +0000 +++ b/alt_audio_convert.c Thu May 23 12:37:13 2002 +0000 @@ -157,7 +157,7 @@ static int convertMonoToStereo( AdapterC Data, int length ) { int i; - short* buffer = Data.buffer-2; + short* buffer = Data.buffer-1; length *= 2; /* @@ -165,8 +165,8 @@ * !!! FIXME: a second index variable? --ryan. */ for( i = length; i; i-=2 ) - buffer[i] = buffer [i+1] = buffer[i/2]; - return length*2; + buffer[i] = buffer [i-1] = buffer[i/2]; + return length; } /*-------------------------------------------------------------------------*/ @@ -351,10 +351,15 @@ if( Ratio > 1.0) VarPos = filter_index++; else + { + fprintf (stderr, "Filter: minus5dB\n"); Data->adapter[filter_index++] = minus5dB; + } while( Ratio > 64.0/31.0) { + fprintf (stderr, "Filter: %s\n", + Mono ? "doubleRateMono" : "doubleRateStereo"); Data->adapter[filter_index++] = Mono ? doubleRateMono : doubleRateStereo; Ratio /= 2; @@ -365,6 +370,8 @@ while( Ratio < 31.0/64.0 ) { + fprintf (stderr, "Filter: %s\n", + Mono ? "halfRateMono" : "halfRateStereo"); Data->adapter[filter_index++] = Mono ? halfRateMono : halfRateStereo; Ratio *= 2; @@ -372,6 +379,8 @@ if( Ratio > 1.0 ) { + fprintf (stderr, "Filter: %s\n", + Mono ? "varRateMono" : "varRateStereo"); setupVarFilter( &Data->filter, Ratio, Up ); Data->adapter[VarPos] = Mono ? varRateMono : varRateStereo; @@ -381,11 +390,13 @@ } else { + fprintf (stderr, "Filter: %s\n", + Mono ? "varRateMono" : "varRateStereo"); setupVarFilter( &Data->filter, Ratio, Down ); Data->adapter[filter_index++] = Mono ? varRateMono : varRateStereo; } - return 0; + return filter_index; } static int BuildAudioCVT(Sound_AudioCVT *Data, @@ -606,6 +617,20 @@ src_format |= ( AUDIO_16WRONG | AUDIO_SIGN ); dst_format |= AUDIO_16WRONG; } /* if */ + + if ( src_rate != dst_rate ) + { + /* + * !!! FIXME !!! + * + * The audio conversion filter probably only works if the + * data is in system byte order. So we need to convert to + * system byte order, and then back to original byte + * order. This is not an optimal solution. + */ + src_format |= AUDIO_16WRONG; + dst_format |= AUDIO_16WRONG; + } } /* else if */ else if ( SIGNED(src_in_format) != SIGNED(dst_in_format) ) {