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output/alsa: basic infrastructure for DSD_U16 and DSD_U32

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This commit is contained in:
Max Kellermann
2016-02-26 18:31:16 +01:00
parent dcaf299864
commit 6a53fb33da
1 changed files with 20 additions and 0 deletions
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20
src/output/plugins/AlsaOutputPlugin.cxx
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@@ -39,6 +39,11 @@
#define HAVE_ALSA_DSD #define HAVE_ALSA_DSD
#endif #endif
#if SND_LIB_VERSION >= 0x1001d
/* alsa-lib supports DSD_U32 since version 1.0.29 */
#define HAVE_ALSA_DSD_U32
#endif
static const char default_device[] = "default"; static const char default_device[] = "default";
static constexpr unsigned MPD_ALSA_BUFFER_TIME_US = 500000; static constexpr unsigned MPD_ALSA_BUFFER_TIME_US = 500000;
@@ -314,6 +319,21 @@ byteswap_bitformat(snd_pcm_format_t fmt)
return SND_PCM_FORMAT_S24_3BE; return SND_PCM_FORMAT_S24_3BE;
case SND_PCM_FORMAT_S32_BE: return SND_PCM_FORMAT_S32_LE; case SND_PCM_FORMAT_S32_BE: return SND_PCM_FORMAT_S32_LE;
#ifdef HAVE_ALSA_DSD_U32
case SND_PCM_FORMAT_DSD_U16_LE:
return SND_PCM_FORMAT_DSD_U16_BE;
case SND_PCM_FORMAT_DSD_U16_BE:
return SND_PCM_FORMAT_DSD_U16_LE;
case SND_PCM_FORMAT_DSD_U32_LE:
return SND_PCM_FORMAT_DSD_U32_BE;
case SND_PCM_FORMAT_DSD_U32_BE:
return SND_PCM_FORMAT_DSD_U32_LE;
#endif
default: return SND_PCM_FORMAT_UNKNOWN; default: return SND_PCM_FORMAT_UNKNOWN;
} }
} }