dom/midi/AlsaCompatibility.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   3  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "mozilla/Assertions.h"
   6
   7 // The code in this file is a workaround for building with ALSA versions prior
   8 // to 1.1. Various functions that the alsa crate (a dependency of the midir
   9 // crate) use are missing from those versions. The functions are not actually
  10 // used so we provide dummy implementations that return an error. This file
  11 // can be safely removed when the Linux sysroot will be updated to Debian 9
  12 // (or higher)
  13 #include <alsa/asoundlib.h>
  14
  15 extern "C" {
  16
  17 #define ALSA_DIVERT(func)                       \
  18   int func(void) {                              \
  19     MOZ_CRASH(#func "should never be called."); \
  20     return -1;                                  \
  21   }
  22
  23 #if (SND_LIB_MAJOR == 1) && (SND_LIB_MINOR == 0) && (SND_LIB_SUBMINOR < 29)
  24 ALSA_DIVERT(snd_pcm_sw_params_set_tstamp_type)
  25 ALSA_DIVERT(snd_pcm_sw_params_get_tstamp_type)
  26 #endif
  27
  28 #if (SND_LIB_MAJOR == 1) && (SND_LIB_MINOR < 1)
  29 ALSA_DIVERT(snd_pcm_hw_params_supports_audio_ts_type)
  30 ALSA_DIVERT(snd_pcm_status_set_audio_htstamp_config)
  31 #endif
  32 }