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osxaudio: add support for parsing more channel layouts ...

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... and fallback to gst_audio_info_set_format for not yet supported layouts.

Fix audio playback on iOS 12.
Based on patch from Byron Schiel <byron@canary.is>

https://bugzilla.gnome.org/show_bug.cgi?id=796919
This commit is contained in:
Nicola Murino 2018-09-24 11:45:46 +02:00 committed by Sebastian Dröge
parent bc0ea0dbbb
commit 3573f71c91
1 changed files with 111 additions and 36 deletions
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147
sys/osxaudio/gstosxcoreaudio.c
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@ -340,43 +340,116 @@ gst_core_audio_parse_channel_layout (AudioChannelLayout * layout,
g_assert (channel_mask != NULL);
g_assert (layout != NULL);
if (layout->mChannelLayoutTag !=
if (layout->mChannelLayoutTag ==
kAudioChannelLayoutTag_UseChannelDescriptions) {
GST_ERROR
("Only kAudioChannelLayoutTag_UseChannelDescriptions is supported.");
switch (layout->mNumberChannelDescriptions) {
case 0:
if (pos)
pos[0] = GST_AUDIO_CHANNEL_POSITION_NONE;
*channels = 0;
*channel_mask = 0;
return TRUE;
case 1:
if (pos)
pos[0] = GST_AUDIO_CHANNEL_POSITION_MONO;
*channels = 1;
*channel_mask = 0;
return TRUE;
case 2:
if (pos) {
pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
}
*channels = 2;
*channel_mask =
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_LEFT) |
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_RIGHT);
return TRUE;
default:
_core_audio_parse_channel_descriptions (layout, channels, channel_mask,
pos);
return TRUE;
}
} else if (layout->mChannelLayoutTag == kAudioChannelLayoutTag_Mono) {
if (pos)
pos[0] = GST_AUDIO_CHANNEL_POSITION_MONO;
*channels = 1;
*channel_mask = 0;
return TRUE;
} else if (layout->mChannelLayoutTag == kAudioChannelLayoutTag_Stereo ||
layout->mChannelLayoutTag == kAudioChannelLayoutTag_StereoHeadphones ||
layout->mChannelLayoutTag == kAudioChannelLayoutTag_Binaural) {
if (pos) {
pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
}
*channels = 2;
*channel_mask =
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_LEFT) |
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_RIGHT);
return TRUE;
} else if (layout->mChannelLayoutTag == kAudioChannelLayoutTag_Quadraphonic) {
if (pos) {
pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
pos[2] = GST_AUDIO_CHANNEL_POSITION_SURROUND_LEFT;
pos[3] = GST_AUDIO_CHANNEL_POSITION_SURROUND_RIGHT;
}
*channels = 4;
*channel_mask =
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_LEFT) |
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_RIGHT) |
GST_AUDIO_CHANNEL_POSITION_MASK (SURROUND_LEFT) |
GST_AUDIO_CHANNEL_POSITION_MASK (SURROUND_RIGHT);
return TRUE;
} else if (layout->mChannelLayoutTag == kAudioChannelLayoutTag_Pentagonal) {
if (pos) {
pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
pos[2] = GST_AUDIO_CHANNEL_POSITION_SURROUND_LEFT;
pos[3] = GST_AUDIO_CHANNEL_POSITION_SURROUND_RIGHT;
pos[4] = GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER;
}
*channels = 5;
*channel_mask =
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_LEFT) |
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_RIGHT) |
GST_AUDIO_CHANNEL_POSITION_MASK (SURROUND_LEFT) |
GST_AUDIO_CHANNEL_POSITION_MASK (SURROUND_RIGHT) |
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_CENTER);
return TRUE;
} else if (layout->mChannelLayoutTag == kAudioChannelLayoutTag_Cube) {
if (pos) {
pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
pos[2] = GST_AUDIO_CHANNEL_POSITION_REAR_LEFT;
pos[3] = GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT;
pos[4] = GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT;
pos[5] = GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT;
pos[6] = GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT;
pos[7] = GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT;
}
*channels = 8;
*channel_mask =
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_LEFT) |
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_RIGHT) |
GST_AUDIO_CHANNEL_POSITION_MASK (REAR_LEFT) |
GST_AUDIO_CHANNEL_POSITION_MASK (REAR_RIGHT) |
GST_AUDIO_CHANNEL_POSITION_MASK (TOP_FRONT_LEFT) |
GST_AUDIO_CHANNEL_POSITION_MASK (TOP_FRONT_RIGHT) |
GST_AUDIO_CHANNEL_POSITION_MASK (TOP_REAR_LEFT) |
GST_AUDIO_CHANNEL_POSITION_MASK (TOP_REAR_RIGHT);
return TRUE;
} else {
GST_WARNING
("AudioChannelLayoutTag: %u not yet supported",
layout->mChannelLayoutTag);
*channels = 0;
*channel_mask = 0;
return FALSE;
}
switch (layout->mNumberChannelDescriptions) {
case 0:
if (pos)
pos[0] = GST_AUDIO_CHANNEL_POSITION_NONE;
*channels = 0;
*channel_mask = 0;
return TRUE;
case 1:
if (pos)
pos[0] = GST_AUDIO_CHANNEL_POSITION_MONO;
*channels = 1;
*channel_mask = 0;
return TRUE;
case 2:
if (pos) {
pos[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
pos[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
}
*channels = 2;
*channel_mask =
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_LEFT) |
GST_AUDIO_CHANNEL_POSITION_MASK (FRONT_RIGHT);
return TRUE;
default:
_core_audio_parse_channel_descriptions (layout, channels, channel_mask,
pos);
return TRUE;
}
}
/* Converts an AudioStreamBasicDescription to preferred caps.
@ -405,6 +478,7 @@ gst_core_audio_asbd_to_caps (AudioStreamBasicDescription * asbd,
guint rate, channels, bps, endianness;
guint64 channel_mask;
gboolean sign, interleaved;
GstAudioChannelPosition pos[GST_OSX_AUDIO_MAX_CHANNEL];
if (asbd->mFormatID != kAudioFormatLinearPCM) {
GST_WARNING ("Only linear PCM is supported");
@ -457,14 +531,15 @@ gst_core_audio_asbd_to_caps (AudioStreamBasicDescription * asbd,
}
if (layout) {
GstAudioChannelPosition pos[GST_OSX_AUDIO_MAX_CHANNEL];
if (!gst_core_audio_parse_channel_layout (layout, &channels, &channel_mask,
pos)) {
GST_WARNING ("Failed to parse channel layout");
goto error;
GST_WARNING
("Failed to parse channel layout, best effort channels layout mapping will be used");
layout = NULL;
}
}
if (layout) {
/* The AU can have arbitrary channel order, but we're using GstAudioInfo
* which supports only the GStreamer channel order.
* Also, we're eventually producing caps, which only have channel-mask