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BUG 11356: Keep iAP messages together by sending length before data

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This commit is contained in:
Russell Gallop
2011-09-21 11:21:58 +01:00
parent c0a701b926
commit c12e0bfce5
1 changed files with 46 additions and 37 deletions
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13
module_usb_aud_shared/usb_buffer/decouple.xc
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@@ -675,6 +675,8 @@ void decouple(chanend c_mix_out,
int iap_waiting_on_send_to_host = 0;
int iap_to_host_flag = 0;
int iap_from_host_flag = 0;
int iap_expecting_length = 1;
int iap_expecting_data_length = 0;
#endif
int t = array_to_xc_ptr(outAudioBuff);
@@ -1168,6 +1170,7 @@ void decouple(chanend c_mix_out,
if (iap_reset) {
iap_send_reset(c_iap); // What if this happen in the middle of a send/ack?
iap_reset = 0;
iap_expecting_length = 1;
SET_SHARED_GLOBAL(g_iap_reset, iap_reset); // Reset has been signalled
}
// Need to handle sending ZLP on iap_to_host_usb_ep_int to signal iOS device to collect from bulk endpoint.
@@ -1256,6 +1259,10 @@ void decouple(chanend c_mix_out,
{
/* The iap/uart thread has sent us some data - handshake back */
iap_send_ack(c_iap);
if (iap_expecting_length) {
iap_expecting_data_length = datum_iap;
iap_expecting_length = 0;
} else {
if (iap_data_collected_from_device < IAP_USB_BUFFER_TO_HOST_SIZE)
{
/* There is room in the collecting buffer for the data */
@@ -1269,8 +1276,8 @@ void decouple(chanend c_mix_out,
// Too many events from device - drop
}
// If we are not sending data to the host then initiate it
if (!iap_waiting_on_send_to_host)
// If we are not sending data to the host then initiate it (ONLY IF GOT WHOLE MESSAGE)
if (!iap_waiting_on_send_to_host && (iap_data_collected_from_device == iap_expecting_data_length))
{
// Set first element of buffer to length i.e. iap_to_host_buffer_being_collected[0] = iap_data_collected_from_device;
write_via_xc_ptr(iap_to_host_buffer_being_collected, iap_data_collected_from_device);
@@ -1282,6 +1289,8 @@ void decouple(chanend c_mix_out,
XUD_SetReady_In(iap_to_host_usb_ep, 0, iap_to_host_buffer_being_sent+4, iap_data_collected_from_device);
iap_data_collected_from_device = 0;
iap_waiting_on_send_to_host = 1;
iap_expecting_length = 1;
}
}
}
break;