vg_depencies.c

   1 #include "vg_vorbis.h"
   2 #include "vg_image.h"
   3
   4 #undef STB_VORBIS_HEADER_ONLY
   5 #include "submodules/stb/stb_vorbis.c"
   6 #undef L
   7 #undef R
   8 #undef C
   9
  10 #define STB_IMAGE_WRITE_IMPLEMENTATION
  11 #define STB_IMAGE_IMPLEMENTATION
  12 #include "vg/submodules/stb/stb_image.h"
  13 #include "vg/submodules/stb/stb_image_write.h"
  14
  15 /*
  16  * adapted from stb_vorbis.h, since the original does not handle mono->stereo
  17  */
  18 int
  19 stb_vorbis_get_samples_float_interleaved_stereo( stb_vorbis *f, float *buffer,
  20                                                  int len )
  21 {
  22    int n = 0, c = 1;
  23    if( f->channels < 2 ) c = 0;
  24
  25    while( n < len ) {
  26       int k = f->channel_buffer_end - f->channel_buffer_start;
  27
  28       if( n+k >= len )
  29          k = len - n;
  30
  31       for( int j=0; j < k; ++j ) {
  32          *buffer++ = f->channel_buffers[ 0 ][f->channel_buffer_start+j];
  33          *buffer++ = f->channel_buffers[ c ][f->channel_buffer_start+j];
  34       }
  35
  36       n += k;
  37       f->channel_buffer_start += k;
  38
  39       if( n == len )
  40          break;
  41
  42       if( !stb_vorbis_get_frame_float( f, NULL, NULL ))
  43          break;
  44    }
  45
  46    return n;
  47 }
  48
  49 /*
  50  * ........ more wrecked code sorry!
  51  */
  52 int
  53 stb_vorbis_get_samples_i16_downmixed( stb_vorbis *f, i16 *buffer, int len )
  54 {
  55    int n = 0, c = 1;
  56    if( f->channels < 2 ) c = 0;
  57
  58    while( n < len ) {
  59       int k = f->channel_buffer_end - f->channel_buffer_start;
  60
  61       if( n+k >= len )
  62          k = len - n;
  63
  64       for( int j=0; j < k; ++j ) {
  65          float sl = f->channel_buffers[ 0 ][f->channel_buffer_start+j],
  66                sr = f->channel_buffers[ c ][f->channel_buffer_start+j];
  67
  68          *buffer++ = vg_clampf( 0.5f*(sl+sr), -1.0f, 1.0f ) * 32767.0f;
  69          //*buffer++ = vg_clampf( sr, -1.0f, 1.0f ) * 32767.0f;
  70       }
  71
  72       n += k;
  73       f->channel_buffer_start += k;
  74
  75       if( n == len )
  76          break;
  77
  78       if( !stb_vorbis_get_frame_float( f, NULL, NULL ))
  79          break;
  80    }
  81
  82    return n;
  83 }