[SDL] Mix_VolumeMusic doesn't work properly

P. M. polymorphic_messiah at hotmail.com
Wed Jan 22 19:43:02 PST 2003


Sorry about that last message, i missed line 116 in there indicating the use 
of Mix_Music to play (.mod .s3m .it .xm) file.  Dont use Mix_Chunk :)



>From: "P. M." <polymorphic_messiah at hotmail.com>
>Reply-To: sdl at libsdl.org
>To: sdl at libsdl.org
>Subject: Re: Re: [SDL] Mix_VolumeMusic doesn't work properly
>Date: Thu, 23 Jan 2003 03:13:42 +0000
>
>Have u tried using Mix_Chunk instead of Mix_Music. The following taken from 
>SDL_mixer.h indicates the use of Mix_LoadWAV() or Mix_LoadWAV_RW() for the 
>type of data your describing.  Line 115 indicates that Mix_LoadWAV() is 
>essentially the same as Mix_LoadWAV_RW only with a couple extra parameters 
>ie "rb" and 1 thus Mix_LoadWAV() should be enough.  Change the volume via 
>Mix_VolumeChunk() or directly from the Mix_Chunk struct eg
>
>Mix_Chunk *chunk;
>chunk->volume = 100;
>
>SDL_mixer.h
>00113 /* Load a wave file or a music (.mod .s3m .it .xm) file */
>00114 extern DECLSPEC Mix_Chunk *Mix_LoadWAV_RW(SDL_RWops *src, int 
>freesrc);
>00115 #define Mix_LoadWAV(file)       Mix_LoadWAV_RW(SDL_RWFromFile(file, 
>"rb"),1)
>
>
>
>
>
>
>>From: "Jesse David Andrews" <jdandr2 at uky.edu>
>>Reply-To: sdl at libsdl.org
>>To: sdl at libsdl.org
>>Subject: Re: Re: [SDL] Mix_VolumeMusic doesn't work properly
>>Date: Wed, 22 Jan 2003 15:21:21 -0500
>>
>>ok, I dug around the source, and here is the problem:
>>
>>from wavstream.c:
>>
>>/* Unimplemented */
>>extern void WAVStream_SetVolume(int volume)
>>{
>>}
>>
>>-----Original Message-----
>>From: Robert Diel <robert at littlebitlost.com>
>>To: sdl at libsdl.org
>>Date: 22 Jan 2003 13:44:14 -0600
>>Subject: Re: [SDL] Mix_VolumeMusic doesn't work properly
>>
>>Have you tried Mix_Volume or Mix_VolumeChunk?
>>
>>On Wed, 2003-01-22 at 11:30, Jesse David Andrews wrote:
>> > What operating system?  I also have .it & .mod files working, but I 
>>cannot get the volume to change for .wav (haven't tried MP3).
>> >
>> > I am on linux.
>> >
>> > Jesse
>> >
>> >
>> > -----Original Message-----
>> > From: enzogupi at interfree.it ()
>> > To: sdl at libsdl.org
>> > Date: 22 Jan 2003 13:17:32 -0000
>> > Subject: [SDL] Mix_VolumeMusic doesn't work properly
>> >
>> >
>> > When I try to use Mix_VolumeMusic on mp3 files everithing goes ok.
>> > When I replace mp3 with a "midi+sample" music file (ex. .it or .xm)
>> > I obtain no effect.
>> >
>> > You can try by yourself with this small program and the "music.it"
>> > file included in SDL "aliens" demo.
>> >
>> > Simply type:
>> >    gcc -c testmusic.c
>> >    gcc -o testmusic testmusic.o -lSDL -lSDL_mixer -lpthread
>> >
>> > and you'll see that modifing the Mix_VolumeMusic value doesn't
>> > change the result.
>> >
>> > I don't think it's my fault 'cause it works with mp3 music.
>> >
>> > Thanks,
>> > Enzo.
>> >
>> > --- file testmusic.c
>> >
>> > #include <SDL/SDL.h>
>> > #include <SDL/SDL_mixer.h>
>> > char MusicName [] = "music.it";
>> > Mix_Music* Music;
>> > int main()
>> > {
>> >   if (SDL_Init (SDL_INIT_AUDIO) >= 0) {
>> >     if (Mix_OpenAudio (44100,AUDIO_S16,1,8192) >= 0) {
>> >       Music = Mix_LoadMUS (MusicName);
>> >       Mix_VolumeMusic (50);
>> >       if (Music) {
>> > 	Mix_PlayMusic (Music,0);
>> > 	while (Mix_PlayingMusic()) SDL_Delay (100);
>> > 	Mix_FreeMusic (Music);
>> >       }
>> >     }
>> >   }
>> >   SDL_Quit();
>> >   return 0;
>> > };
>> >
>> >
>> >
>> >
>> > -----------------------------------------------------
>> >
>> > Salve, il messaggio che hai ricevuto
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>> > Ti aspettiamo!
>> >
>> > -----------------------------------------------------
>> >
>> >
>> >
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