[Openal] reading and playing a raw file

[angelo]

Thanks Jason, that definitely solved the problem.

in honour to alutCreateBufferFromFile, it don't handle raw files, since 
it can't retrieve any format/frequency without a raw header.

greetings,
Angelo
 

Jason Daly ha scritto:
> angelo wrote:
>> Hi all,
>>
>> i am trying to read and play a recorded raw file, 8Khz, 16bit x 
>> sample mono.
>>
>> I am using "alutCreateBufferFromFile" since it is helpful, and it is 
>> working fine with a regular wav file.
>> If i try to open a recorded raw file (samples only, no 
>> headers,generted through "alcCaptureSamples"), 
>> "alutCreateBufferFromFile" seems to load it, but once played a bad 
>> sound is heard.
>>   
>
> Hi, Angelo,
>
> Probably the best way to handle this is to just load the file directly 
> (not through alut), create the buffer manually, and use alBufferData() 
> to pass in your data.  It would look something like this:
>
>   FILE *audioFile;
>   unsigned char audioBuffer[AUDIO_DATA_SIZE];
>   ALuint buffer, source;
>
>   // Read the audio data from the file
>   audioFile = fopen("audio.raw", "r");
>   fread(audioBuffer, sizeof(unsigned char),
>         AUDIO_DATA_SIZE, audioFile);
>
>   // Generate an OpenAL buffer for the data
>   alGenBuffers(1, &buffer);
>   alBufferData(buffer, AL_FORMAT_MONO16, audioBuffer,
>                AUDIO_DATA_SIZE, 8000);
>
>   // Pass the buffer to an OpenAL source and play it
>   alGenSources(1, &source);
>   alSourcei(source, AL_BUFFER, buffer);
>   alSourcePlay(source);
>
>
> Hope this helps...
>
> --"J"
>