cin_common.c

   1 /*
   2  * Copyright (c) 2018 AlaskanEmily
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   6  */
   7
   8 #include "cin_common.h"
   9 #include "cin_loader.h"
  10 #include "cin_driver.h"
  11
  12 #include <assert.h>
  13
  14 #define CIN_COMMON_LOADER_ASSERT_ENUMS_EQUAL(WHAT)\
  15     assert((int)Cin_eLoader ## WHAT == (int)Cin_eDriver ## WHAT)
  16
  17 CIN_PRIVATE(enum Cin_LoaderError) Cin_FormatCompatible(struct Cin_Driver *drv,
  18     unsigned sample_rate,
  19     unsigned num_channels,
  20     enum Cin_Format format){
  21
  22     CIN_COMMON_LOADER_ASSERT_ENUMS_EQUAL(UnsupportedFormat);
  23     CIN_COMMON_LOADER_ASSERT_ENUMS_EQUAL(InvalidFormat);
  24     CIN_COMMON_LOADER_ASSERT_ENUMS_EQUAL(UnsupportedNumChannels);
  25     CIN_COMMON_LOADER_ASSERT_ENUMS_EQUAL(UnsupportedSampleRate);
  26
  27     {
  28         const enum Cin_DriverError drv_err =
  29             Cin_DriverSupportsFormat(drv, format, num_channels);
  30         if(drv_err != Cin_eDriverSuccess){
  31             assert(drv_err == Cin_eDriverUnsupportedFormat ||
  32                 drv_err == Cin_eDriverInvalidFormat ||
  33                 drv_err == Cin_eDriverUnsupportedNumChannels);
  34             return (enum Cin_LoaderError)drv_err;
  35         }
  36     }
  37
  38     {
  39         const enum Cin_DriverError drv_err =
  40             Cin_DriverSupportsSampleRate(drv, sample_rate);
  41         if(drv_err != Cin_eDriverSuccess){
  42             assert(drv_err == Cin_eLoaderUnsupportedSampleRate);
  43             return (enum Cin_LoaderError)drv_err;
  44         }
  45     }
  46
  47     return Cin_eLoaderSuccess;
  48 }
  49
  50 CIN_PRIVATE_PURE(unsigned) Cin_BytesPerSample(enum Cin_Format format){
  51     switch(format){
  52         case Cin_eFormatS8:
  53             return 1;
  54         case Cin_eFormatS16:
  55             return 2;
  56         case Cin_eFormatS32:
  57             return 4;
  58         case Cin_eFormatFloat32:
  59             return 4;
  60         case Cin_eFormatFloat64:
  61             return 8;
  62         case Cin_eFormatULaw8:
  63             return 1;
  64         default:
  65             return 0;
  66     }
  67 }