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Added audio stream start/stop callbacks for input/output

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This commit is contained in:
Oscar Bailey
2019-08-23 09:30:05 +01:00
parent 5a13171a40
commit a120d7a83e
4 changed files with 81 additions and 12 deletions
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1
CHANGELOG.rst
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@@ -6,6 +6,7 @@ lib_xua Change Log
* ADDED: Initial library documentation
* ADDED: Application note AN00247: Using lib_xua with lib_spdif (transmit)
* ADDED: Callbacks for input/output audio stream start/stop
* CHANGE: I2S hardware resources no longer used globally and must be passed
to XUA_AudioHub()
* CHANGE: XUA_AudioHub() no longer pars S/PDIF transmitter task

51
lib_xua/src/core/endpoint0/xua_endpoint0.c
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@@ -409,23 +409,48 @@ void XUA_Endpoint0(chanend c_ep0_out, chanend c_ep0_in, chanend c_audioControl,
}
#if (NUM_USB_CHAN_OUT > 0) && (NUM_USB_CHAN_IN > 0)
if ((sp.wIndex == INTERFACE_NUMBER_AUDIO_OUTPUT) || (sp.wIndex == INTERFACE_NUMBER_AUDIO_INPUT))
unsigned num_input_interfaces = g_interfaceAlt[INTERFACE_NUMBER_AUDIO_INPUT];
unsigned num_output_interfaces = g_interfaceAlt[INTERFACE_NUMBER_AUDIO_OUTPUT];
if (sp.wIndex == INTERFACE_NUMBER_AUDIO_INPUT)
{
/* Check for stream start stop on output and input audio interfaces */
if(sp.wValue && !g_interfaceAlt[INTERFACE_NUMBER_AUDIO_OUTPUT] && !g_interfaceAlt[INTERFACE_NUMBER_AUDIO_INPUT])
// in: 0 -> 1
if (sp.wValue && !num_input_interfaces)
{
/* If start and input AND output not currently running */
UserAudioStreamStart();
UserAudioInputStreamStart();
if (!num_output_interfaces)
{
UserAudioStreamStart();
}
}
else if(((sp.wIndex == 1) && (!sp.wValue)) && g_interfaceAlt[INTERFACE_NUMBER_AUDIO_OUTPUT] && (!g_interfaceAlt[INTERFACE_NUMBER_AUDIO_INPUT]))
// in: 1 -> 0
else if (!sp.wValue && num_input_interfaces)
{
/* if output stop and output running and input not running */
UserAudioStreamStop();
UserAudioInputStreamStop();
if (!num_output_interfaces)
{
UserAudioStreamStop();
}
}
else if(((sp.wIndex == 2) && (!sp.wValue)) && g_interfaceAlt[INTERFACE_NUMBER_AUDIO_INPUT] && (!g_interfaceAlt[INTERFACE_NUMBER_AUDIO_OUTPUT]))
}
else if (sp.wIndex == INTERFACE_NUMBER_AUDIO_OUTPUT)
{
// out: 0 -> 1
if (sp.wValue && !num_output_interfaces)
{
/* if input stop and input running and output not running */
UserAudioStreamStop();
UserAudioOutputStreamStart();
if (!num_input_interfaces)
{
UserAudioStreamStart();
}
}
// out: 1 -> 0
else if (!sp.wValue && num_output_interfaces)
{
UserAudioOutputStreamStop();
if (!num_input_interfaces)
{
UserAudioStreamStop();
}
}
}
#elif (NUM_USB_CHAN_OUT > 0)
@@ -435,11 +460,13 @@ void XUA_Endpoint0(chanend c_ep0_out, chanend c_ep0_in, chanend c_audioControl,
{
/* if start and not currently running */
UserAudioStreamStart();
UserAudioOutputStreamStart();
}
else if (!sp.wValue && g_interfaceAlt[INTERFACE_NUMBER_AUDIO_OUTPUT])
{
/* if stop and currently running */
UserAudioStreamStop();
UserAudioOutputStreamStop();
}
}
#elif (NUM_USB_CHAN_IN > 0)
@@ -449,11 +476,13 @@ void XUA_Endpoint0(chanend c_ep0_out, chanend c_ep0_in, chanend c_audioControl,
{
/* if start and not currently running */
UserAudioStreamStart();
UserAudioInputStreamStart();
}
else if (!sp.wValue && g_interfaceAlt[INTERFACE_NUMBER_AUDIO_INPUT])
{
/* if stop and currently running */
UserAudioStreamStop();
UserAudioInputStreamStop();
}
}
#endif

29
lib_xua/src/core/user/audiostream/audiostream.c
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@@ -1,6 +1,9 @@
// Copyright (c) 2013-2018, XMOS Ltd, All rights reserved
/* Deafult implementations of AudioStreamStop() and AudioStreamStart(). Both can be over-ridden */
/* Default implementations of AudioStreamStop() and AudioStreamStart()
* callbacks.
*/
void UserAudioStreamStop() __attribute__ ((weak));
void UserAudioStreamStop()
{
@@ -12,3 +15,27 @@ void UserAudioStreamStart()
{
return;
}
void UserAudioInputStreamStop() __attribute__ ((weak));
void UserAudioInputStreamStop()
{
return;
}
void UserAudioInputStreamStart() __attribute__ ((weak));
void UserAudioInputStreamStart()
{
return;
}
void UserAudioOutputStreamStop() __attribute__ ((weak));
void UserAudioOutputStreamStop()
{
return;
}
void UserAudioOutputStreamStart() __attribute__ ((weak));
void UserAudioOutputStreamStart()
{
return;
}

12
lib_xua/src/core/user/audiostream/audiostream.h
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@@ -14,5 +14,17 @@ void UserAudioStreamStart(void);
/* Any actions required on stream stop e.g. DAC mute - run every steam stop */
void UserAudioStreamStop(void);
/* Any actions required on input stream start */
void UserAudioInputStreamStart(void);
/* Any actions required on input stream stop */
void UserAudioInputStreamStop(void);
/* Any actions required on output stream start */
void UserAudioOutputStreamStart(void);
/* Any actions required on output stream stop */
void UserAudioOutputStreamStop(void);
#endif