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Minor updates to channel mapping.

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This commit is contained in:
David Reid
2021-07-04 11:36:24 +10:00
parent 81d720e09f
commit 072efc6f8b
1 changed files with 163 additions and 14 deletions
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miniaudio.h
+163 -14
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@@ -1,6 +1,6 @@
/*
Audio playback and capture library. Choice of public domain or MIT-0. See license statements at the end of this file.
miniaudio - v0.10.36 - 2021-07-03
miniaudio - v0.10.37 - TBD
David Reid - mackron@gmail.com
@@ -1498,7 +1498,7 @@ extern "C" {
#define MA_VERSION_MAJOR 0
#define MA_VERSION_MINOR 10
#define MA_VERSION_REVISION 36
#define MA_VERSION_REVISION 37
#define MA_VERSION_STRING MA_XSTRINGIFY(MA_VERSION_MAJOR) "." MA_XSTRINGIFY(MA_VERSION_MINOR) "." MA_XSTRINGIFY(MA_VERSION_REVISION)
#if defined(_MSC_VER) && !defined(__clang__)
@@ -2746,6 +2746,20 @@ MA_API void ma_interleave_pcm_frames(ma_format format, ma_uint32 channels, ma_ui
Channel Maps
************************************************************************************************************************************************************/
/*
This is used in the shuffle table to indicate that the channel index is undefined and should be ignored.
*/
#define MA_CHANNEL_INDEX_NULL 255
/* Retrieves the channel position of the specified channel based on miniaudio's default channel map. */
MA_API ma_channel ma_channel_map_get_default_channel(ma_uint32 channelCount, ma_uint32 channelIndex);
/*
Retrieves the channel position of the specified channel in the given channel map.
The pChannelMap parameter can be null, in which case miniaudio's default channel map will be assumed.
*/
MA_API ma_channel ma_channel_map_get_channel(const ma_channel* pChannelMap, ma_uint32 channelCount, ma_uint32 channelIndex);
/*
Initializes a blank channel map.
@@ -40192,6 +40206,10 @@ static ma_bool32 ma_is_spatial_channel_position(ma_channel channelPosition)
return MA_FALSE;
}
if (channelPosition >= MA_CHANNEL_AUX_0 || channelPosition <= MA_CHANNEL_AUX_31) {
return MA_FALSE;
}
for (i = 0; i < 6; ++i) { /* Each side of a cube. */
if (g_maChannelPlaneRatios[channelPosition][i] != 0) {
return MA_TRUE;
@@ -41859,6 +41877,134 @@ MA_API ma_uint64 ma_data_converter_get_output_latency(const ma_data_converter* p
Channel Maps
**************************************************************************************************************************************************************/
MA_API ma_channel ma_channel_map_get_default_channel(ma_uint32 channelCount, ma_uint32 channelIndex)
{
if (channelCount == 0 || channelIndex >= channelCount) {
return MA_CHANNEL_NONE;
}
/* This is the Microsoft channel map. Based off the speaker configurations mentioned here: https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/content/ksmedia/ns-ksmedia-ksaudio_channel_config */
switch (channelCount)
{
case 0: return MA_CHANNEL_NONE;
case 1:
{
return MA_CHANNEL_MONO;
} break;
case 2:
{
switch (channelIndex) {
case 0: return MA_CHANNEL_FRONT_LEFT;
case 1: return MA_CHANNEL_FRONT_RIGHT;
}
} break;
case 3: /* No defined, but best guess. */
{
switch (channelIndex) {
case 0: return MA_CHANNEL_FRONT_LEFT;
case 1: return MA_CHANNEL_FRONT_RIGHT;
case 2: return MA_CHANNEL_FRONT_CENTER;
}
} break;
case 4:
{
switch (channelIndex) {
#ifndef MA_USE_QUAD_MICROSOFT_CHANNEL_MAP
/* Surround. Using the Surround profile has the advantage of the 3rd channel (MA_CHANNEL_FRONT_CENTER) mapping nicely with higher channel counts. */
case 0: return MA_CHANNEL_FRONT_LEFT;
case 1: return MA_CHANNEL_FRONT_RIGHT;
case 2: return MA_CHANNEL_FRONT_CENTER;
case 3: return MA_CHANNEL_BACK_CENTER;
#else
/* Quad. */
case 0: return MA_CHANNEL_FRONT_LEFT;
case 1: return MA_CHANNEL_FRONT_RIGHT;
case 2: return MA_CHANNEL_BACK_LEFT;
case 3: return MA_CHANNEL_BACK_RIGHT;
#endif
}
} break;
case 5: /* Not defined, but best guess. */
{
switch (channelIndex) {
case 0: return MA_CHANNEL_FRONT_LEFT;
case 1: return MA_CHANNEL_FRONT_RIGHT;
case 2: return MA_CHANNEL_FRONT_CENTER;
case 3: return MA_CHANNEL_BACK_LEFT;
case 4: return MA_CHANNEL_BACK_RIGHT;
}
} break;
case 6:
{
switch (channelIndex) {
case 0: return MA_CHANNEL_FRONT_LEFT;
case 1: return MA_CHANNEL_FRONT_RIGHT;
case 2: return MA_CHANNEL_FRONT_CENTER;
case 3: return MA_CHANNEL_LFE;
case 4: return MA_CHANNEL_SIDE_LEFT;
case 5: return MA_CHANNEL_SIDE_RIGHT;
}
} break;
case 7: /* Not defined, but best guess. */
{
switch (channelIndex) {
case 0: return MA_CHANNEL_FRONT_LEFT;
case 1: return MA_CHANNEL_FRONT_RIGHT;
case 2: return MA_CHANNEL_FRONT_CENTER;
case 3: return MA_CHANNEL_LFE;
case 4: return MA_CHANNEL_BACK_CENTER;
case 5: return MA_CHANNEL_SIDE_LEFT;
case 6: return MA_CHANNEL_SIDE_RIGHT;
}
} break;
case 8:
default:
{
switch (channelIndex) {
case 0: return MA_CHANNEL_FRONT_LEFT;
case 1: return MA_CHANNEL_FRONT_RIGHT;
case 2: return MA_CHANNEL_FRONT_CENTER;
case 3: return MA_CHANNEL_LFE;
case 4: return MA_CHANNEL_BACK_LEFT;
case 5: return MA_CHANNEL_BACK_RIGHT;
case 6: return MA_CHANNEL_SIDE_LEFT;
case 7: return MA_CHANNEL_SIDE_RIGHT;
}
} break;
}
if (channelCount > 8) {
if (channelIndex < 32) { /* We have 32 AUX channels. */
return (ma_channel)(MA_CHANNEL_AUX_0 + (channelIndex - 8));
}
}
/* Getting here means we don't know how to map the channel position so just return MA_CHANNEL_NONE. */
return MA_CHANNEL_NONE;
}
MA_API ma_channel ma_channel_map_get_channel(const ma_channel* pChannelMap, ma_uint32 channelCount, ma_uint32 channelIndex)
{
if (pChannelMap == NULL) {
return ma_channel_map_get_default_channel(channelCount, channelIndex);
} else {
if (channelIndex >= channelCount) {
return MA_CHANNEL_NONE;
}
return pChannelMap[channelIndex];
}
}
MA_API void ma_channel_map_init_blank(ma_uint32 channels, ma_channel* pChannelMap)
{
if (pChannelMap == NULL) {
@@ -41976,8 +42122,8 @@ static void ma_get_standard_channel_map_alsa(ma_uint32 channels, ma_channel* pCh
case 2:
{
pChannelMap[0] = MA_CHANNEL_LEFT;
pChannelMap[1] = MA_CHANNEL_RIGHT;
pChannelMap[0] = MA_CHANNEL_FRONT_LEFT;
pChannelMap[1] = MA_CHANNEL_FRONT_RIGHT;
} break;
case 3:
@@ -42063,8 +42209,8 @@ static void ma_get_standard_channel_map_rfc3551(ma_uint32 channels, ma_channel*
case 2:
{
pChannelMap[0] = MA_CHANNEL_LEFT;
pChannelMap[1] = MA_CHANNEL_RIGHT;
pChannelMap[0] = MA_CHANNEL_FRONT_LEFT;
pChannelMap[1] = MA_CHANNEL_FRONT_RIGHT;
} break;
case 3:
@@ -42126,8 +42272,8 @@ static void ma_get_standard_channel_map_flac(ma_uint32 channels, ma_channel* pCh
case 2:
{
pChannelMap[0] = MA_CHANNEL_LEFT;
pChannelMap[1] = MA_CHANNEL_RIGHT;
pChannelMap[0] = MA_CHANNEL_FRONT_LEFT;
pChannelMap[1] = MA_CHANNEL_FRONT_RIGHT;
} break;
case 3:
@@ -42214,8 +42360,8 @@ static void ma_get_standard_channel_map_vorbis(ma_uint32 channels, ma_channel* p
case 2:
{
pChannelMap[0] = MA_CHANNEL_LEFT;
pChannelMap[1] = MA_CHANNEL_RIGHT;
pChannelMap[0] = MA_CHANNEL_FRONT_LEFT;
pChannelMap[1] = MA_CHANNEL_FRONT_RIGHT;
} break;
case 3:
@@ -42301,8 +42447,8 @@ static void ma_get_standard_channel_map_sound4(ma_uint32 channels, ma_channel* p
case 2:
{
pChannelMap[0] = MA_CHANNEL_LEFT;
pChannelMap[1] = MA_CHANNEL_RIGHT;
pChannelMap[0] = MA_CHANNEL_FRONT_LEFT;
pChannelMap[1] = MA_CHANNEL_FRONT_RIGHT;
} break;
case 3:
@@ -42388,8 +42534,8 @@ static void ma_get_standard_channel_map_sndio(ma_uint32 channels, ma_channel* pC
case 2:
{
pChannelMap[0] = MA_CHANNEL_LEFT;
pChannelMap[1] = MA_CHANNEL_RIGHT;
pChannelMap[0] = MA_CHANNEL_FRONT_LEFT;
pChannelMap[1] = MA_CHANNEL_FRONT_RIGHT;
} break;
case 3:
@@ -69117,6 +69263,9 @@ The following miscellaneous changes have also been made.
/*
REVISION HISTORY
================
0.10.37 - TBD
- Minor updates to channel mapping.
0.10.36 - 2021-07-03
- Add support for custom decoding backends.
- Fix some bugs with the Vorbis decoder.