diff options
| author | Kővágó, Zoltán <dirty.ice.hu@gmail.com> | 2020-02-02 20:38:07 +0100 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2020-02-06 14:35:57 +0100 |
| commit | ed2a4a794184df3dbd5ee4cc06e86fe220663faf (patch) | |
| tree | ed340e8120188691fd89b764ef45ad509005c9a6 /audio/alsaaudio.c | |
| parent | 180b044ffde2cdd4a7209c727b5a8ce93d36741f (diff) | |
audio: proper support for float samples in mixeng
This adds proper support for float samples in mixeng by adding a new
audio format for it.
Limitations: only native endianness is supported. None of the virtual
sound cards support float samples (it looks like most of them only
support 8 and 16 bit, only hda supports 32 bit), it is only used for the
audio backends (i.e. host side).
Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Message-id: 8a8b0b5698401b78d3c4c8ec90aef83b95babb06.1580672076.git.DirtY.iCE.hu@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'audio/alsaaudio.c')
| -rw-r--r-- | audio/alsaaudio.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/audio/alsaaudio.c b/audio/alsaaudio.c index 4ef26818be..a23a5a0b60 100644 --- a/audio/alsaaudio.c +++ b/audio/alsaaudio.c @@ -307,6 +307,13 @@ static snd_pcm_format_t aud_to_alsafmt (AudioFormat fmt, int endianness) return SND_PCM_FORMAT_U32_LE; } + case AUDIO_FORMAT_F32: + if (endianness) { + return SND_PCM_FORMAT_FLOAT_BE; + } else { + return SND_PCM_FORMAT_FLOAT_LE; + } + default: dolog ("Internal logic error: Bad audio format %d\n", fmt); #ifdef DEBUG_AUDIO @@ -370,6 +377,16 @@ static int alsa_to_audfmt (snd_pcm_format_t alsafmt, AudioFormat *fmt, *fmt = AUDIO_FORMAT_U32; break; + case SND_PCM_FORMAT_FLOAT_LE: + *endianness = 0; + *fmt = AUDIO_FORMAT_F32; + break; + + case SND_PCM_FORMAT_FLOAT_BE: + *endianness = 1; + *fmt = AUDIO_FORMAT_F32; + break; + default: dolog ("Unrecognized audio format %d\n", alsafmt); return -1; |