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Fix insufficient buffering in decouple

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Daniel Pieczko
2022-08-08 15:24:04 +01:00
parent 8157a76667
commit 5d331e7f27
2 changed files with 11 additions and 4 deletions
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1
CHANGELOG.rst
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@@ -11,6 +11,7 @@ lib_xua Change Log
* FIXED: Incorrect conditional compilation of HID report code
* FIXED: Input/output descriptors written when input/output not enabled.
(Audio class 1.0 mode using XUA_USB_DESCRIPTOR_OVERWRITE_RATE_RES)
* FIXED: Insufficient buffering of input packets
* Changes to dependencies:

14
lib_xua/src/core/buffer/decouple/decouple.xc
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@@ -41,7 +41,7 @@
/*** BUFFER SIZES ***/
#define BUFFER_PACKET_COUNT 3 /* How many packets too allow for in buffer - minimum is 3! */
#define BUFFER_PACKET_COUNT 4 /* How many packets too allow for in buffer - minimum is 4 */
#define BUFF_SIZE_OUT_HS MAX_DEVICE_AUD_PACKET_SIZE_OUT_HS * BUFFER_PACKET_COUNT
#define BUFF_SIZE_OUT_FS MAX_DEVICE_AUD_PACKET_SIZE_OUT_FS * BUFFER_PACKET_COUNT
@@ -95,7 +95,7 @@ int buffer_aud_ctl_chan = 0;
unsigned g_aud_from_host_flag = 0;
unsigned g_aud_from_host_info;
unsigned g_freqChange_flag = 0;
unsigned g_freqChange_sampFreq;
unsigned g_freqChange_sampFreq = DEFAULT_FREQ;
/* Global vars for sharing stream format change between buffer and decouple (save a channel) */
unsigned g_formatChange_SubSlot;
@@ -520,7 +520,13 @@ __builtin_unreachable();
/* In pipe has filled its buffer - we need to overflow
* Accept the packet, and throw away the oldest in the buffer */
/* Keep throwing away packets until buffer is at a nice level.. */
unsigned sampFreq;
GET_SHARED_GLOBAL(sampFreq, g_freqChange_sampFreq);
int min, mid, max;
GetADCCounts(sampFreq, min, mid, max);
unsigned max_pkt_size = ((max * g_curSubSlot_In * g_numUsbChan_In + 3) & ~0x3) + 4;
/* Keep throwing away packets until buffer contains two packets */
do
{
unsigned rdPtr;
@@ -544,7 +550,7 @@ __builtin_unreachable();
space_left += datalength;
SET_SHARED_GLOBAL(g_aud_to_host_rdptr, rdPtr);
} while(space_left < (BUFF_SIZE_IN/2));
} while(space_left < (BUFF_SIZE_IN - 2 * max_pkt_size));
}
sampsToWrite = totalSampsToWrite;