Revision 0abdb293 libavformat/aiffenc.c

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libavformat/aiffenc.c
21 21 

  		




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#include "avformat.h"


  		




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#include "aiff.h"


  		




  
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#include "avio_internal.h"


  		




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typedef struct {


  		




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    int64_t form;


  		




  ......




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        aifc = 1;


  		




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    /* FORM AIFF header */


  		




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    put_tag(pb, "FORM");


  		




  
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    ffio_wfourcc(pb, "FORM");


  		




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    aiff->form = url_ftell(pb);


  		




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    avio_wb32(pb, 0);                    /* file length */


  		




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    put_tag(pb, aifc ? "AIFC" : "AIFF");


  		




  
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    ffio_wfourcc(pb, aifc ? "AIFC" : "AIFF");


  		




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    if (aifc) { // compressed audio


  		




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        enc->bits_per_coded_sample = 16;


  		




  ......




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            return -1;


  		




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        }


  		




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        /* Version chunk */


  		




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        put_tag(pb, "FVER");


  		




  
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        ffio_wfourcc(pb, "FVER");


  		




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        avio_wb32(pb, 4);


  		




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        avio_wb32(pb, 0xA2805140);


  		




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    }


  		




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    /* Common chunk */


  		




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    put_tag(pb, "COMM");


  		




  
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    ffio_wfourcc(pb, "COMM");


  		




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    avio_wb32(pb, aifc ? 24 : 18); /* size */


  		




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    avio_wb16(pb, enc->channels);  /* Number of channels */


  		




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  ......




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    }


  		




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    /* Sound data chunk */


  		




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    put_tag(pb, "SSND");


  		




  
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    ffio_wfourcc(pb, "SSND");


  		




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    aiff->ssnd = url_ftell(pb);         /* Sound chunk size */


  		




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    avio_wb32(pb, 0);                    /* Sound samples data size */


  		




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    avio_wb32(pb, 0);                    /* Data offset */


  		












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