[PATCH 1/1] mmdevapi/tests: Rewrite capturing tests.

[Giovanni Mascellani]

From: Giovanni Mascellani

The old tests only requested a few packets and only simulated some
of the possible logic paths. They were also somewhat flaky. The
new tests are an attempt at improving completeness and reliability.
---
 dlls/mmdevapi/tests/capture.c | 423 +++++++++++++++-------------------
 1 file changed, 185 insertions(+), 238 deletions(-)

diff --git a/dlls/mmdevapi/tests/capture.c b/dlls/mmdevapi/tests/capture.c
index e4f8eea5556..a95275160ee 100644
--- a/dlls/mmdevapi/tests/capture.c
+++ b/dlls/mmdevapi/tests/capture.c
@@ -21,6 +21,7 @@
  * - IAudioClient with eCapture and IAudioCaptureClient
  */

+#include <stdint.h>
 #include <math.h>

#include "wine/test.h"
@@ -106,313 +107,259 @@ static void test_uninitialized(IAudioClient *ac)
     CloseHandle(handle);
 }

-static void test_capture(IAudioClient *ac, HANDLE handle, WAVEFORMATEX *wfx)
+struct read_packets_data
 {
-    IAudioCaptureClient *acc;
-    HRESULT hr;
-    UINT32 frames, next, pad, sum = 0;
-    BYTE *data;
-    DWORD flags;
-    UINT64 pos, qpc;
-    REFERENCE_TIME period;
-
-    hr = IAudioClient_GetService(ac, &IID_IAudioCaptureClient, (void**)&acc);
-    ok(hr == S_OK, "IAudioClient_GetService(IID_IAudioCaptureClient) returns %08lx\n", hr);
-    if (hr != S_OK)
-        return;
-
-    ok(ResetEvent(handle), "ResetEvent\n");
-
-    hr = IAudioCaptureClient_GetNextPacketSize(acc, &next);
-    ok(hr == S_OK, "IAudioCaptureClient_GetNextPacketSize returns %08lx\n", hr);
+    UINT64 expected_dev_pos;
+    BOOL discontinuity_at_0;
+    BOOL discontinuity_at_later;
+};

-    hr = IAudioClient_GetCurrentPadding(ac, &pad);
-    ok(hr == S_OK, "GetCurrentPadding call returns %08lx\n", hr);
-    ok(next == pad, "GetNextPacketSize %u vs. GCP %u\n", next, pad);
-    /* later GCP will grow, while GNPS is 0 or period size */
+static void read_packets(IAudioClient *ac, IAudioCaptureClient *acc, HANDLE handle,
+        unsigned int packet_count, struct read_packets_data *data, BOOL is_broken)
+{
+    unsigned int idx = 0;
+    HRESULT hr;

-    hr = IAudioCaptureClient_GetNextPacketSize(acc, NULL);
-    ok(hr == E_POINTER, "IAudioCaptureClient_GetNextPacketSize(NULL) returns %08lx\n", hr);
+    data->discontinuity_at_0 = FALSE;
+    data->discontinuity_at_later = FALSE;

-    data = (void*)0xdeadf00d;
-    frames = 0xdeadbeef;
-    flags = 0xabadcafe;
-    hr = IAudioCaptureClient_GetBuffer(acc, &data, NULL, NULL, NULL, NULL);
-    ok(hr == E_POINTER, "IAudioCaptureClient_GetBuffer(data, NULL, NULL) returns %08lx\n", hr);
+    while (idx < packet_count)
+    {
+        UINT64 dev_pos, qpc_pos, dev_pos2, qpc_pos2;
+        UINT32 next_packet_size, padding, frames, frames2;
+        DWORD flags, flags2;
+        BYTE *ptr;

-    hr = IAudioCaptureClient_GetBuffer(acc, NULL, &frames, NULL, NULL, NULL);
-    ok(hr == E_POINTER, "IAudioCaptureClient_GetBuffer(NULL, &frames, NULL) returns %08lx\n", hr);
+        winetest_push_context("packet %u", idx);

-    hr = IAudioCaptureClient_GetBuffer(acc, NULL, NULL, &flags, NULL, NULL);
-    ok(hr == E_POINTER, "IAudioCaptureClient_GetBuffer(NULL, NULL, &flags) returns %08lx\n", hr);
+        hr = IAudioCaptureClient_GetNextPacketSize(acc, &next_packet_size);
+        ok(hr == S_OK, "GetNextPacketSize returns %08lx\n", hr);

-    hr = IAudioCaptureClient_GetBuffer(acc, &data, &frames, NULL, NULL, NULL);
-    ok(hr == E_POINTER, "IAudioCaptureClient_GetBuffer(&ata, &frames, NULL) returns %08lx\n", hr);
-    ok(broken((DWORD_PTR)data == 0xdeadf00d) || /* <= win8 */
-            data == NULL, "data is reset to %p\n", data);
-    ok(frames == 0xdeadbeef, "frames is reset to %08x\n", frames);
-    ok(flags == 0xabadcafe, "flags is reset to %08lx\n", flags);
+        if (next_packet_size == 0)
+        {
+            /* There is some room for flakyness here, in theory a packet could arrive between the
+             * GetNextPacketSize() call and the GetBuffer() call. Hopefully this is not very probable. */
+            ptr = (void*)0xdeadf00ddeadf00d;
+            flags2 = 0xdeadf11d;
+            dev_pos2 = 0xdeadf22ddeadf22d;
+            qpc_pos2 = 0xdeadf33ddeadf33d;
+            hr = IAudioCaptureClient_GetBuffer(acc, &ptr, &frames2, &flags2, &dev_pos2, &qpc_pos2);
+            ok(hr == AUDCLNT_S_BUFFER_EMPTY, "GetBuffer returns %08lx\n", hr);
+            ok(broken(is_broken && (uintptr_t)ptr == (uintptr_t)0xdeadf00ddeadf00d) || /* <= win8 */
+                    !ptr, "Unexpected data after GetBuffer: %p\n", ptr);
+            ok(flags2 == 0xdeadf11d, "Unexpected flags after GetBuffer: %08lx\n", flags2);
+            ok(dev_pos2 == 0xdeadf22ddeadf22d, "Unexpected device position after GetBuffer: %llu\n", dev_pos2);
+            ok(qpc_pos2 == 0xdeadf33ddeadf33d, "Unexpected QPC position after GetBuffer: %llu\n", qpc_pos2);
+
+            ok(WaitForSingleObject(handle, 1000) == WAIT_OBJECT_0, "Waiting on event handle failed!\n");
+
+            winetest_pop_context();
+            continue;
+        }

-    hr = IAudioClient_GetDevicePeriod(ac, &period, NULL);
-    ok(hr == S_OK, "GetDevicePeriod failed: %08lx\n", hr);
-    period = MulDiv(period, wfx->nSamplesPerSec, 10000000); /* as in render.c */
+        hr = IAudioCaptureClient_GetBuffer(acc, &ptr, &frames, &flags, &dev_pos, &qpc_pos);
+        ok(hr == S_OK, "GetBuffer returns %08lx\n", hr);

-    hr = IAudioClient_Start(ac);
-    ok(hr == S_OK, "Start on a stopped stream returns %08lx\n", hr);
+        hr = IAudioClient_GetCurrentPadding(ac, &padding);
+        ok(hr == S_OK, "GetCurrentPadding returns %08lx\n", hr);

-    ok(WaitForSingleObject(handle, 1000) == WAIT_OBJECT_0, "Waiting on event handle failed!\n");
-
-    data = (void*)0xdeadf00d;
-    hr = IAudioCaptureClient_GetBuffer(acc, &data, &frames, &flags, &pos, &qpc);
-    ok(hr == S_OK || hr == AUDCLNT_S_BUFFER_EMPTY, "Valid IAudioCaptureClient_GetBuffer returns %08lx\n", hr);
-    if (hr == S_OK){
-        ok(frames, "Amount of frames locked is 0!\n");
-        /* broken: some w7 machines return pad == 0 and DATA_DISCONTINUITY here,
-         * AUDCLNT_S_BUFFER_EMPTY above, yet pos == 1-2 * period rather than 0 */
-        ok(pos == sum || broken(flags & AUDCLNT_BUFFERFLAGS_DATA_DISCONTINUITY),
-           "Position %u expected %u\n", (UINT)pos, sum);
-        sum = pos;
-    }else if (hr == AUDCLNT_S_BUFFER_EMPTY){
-        ok(!frames, "Amount of frames locked with empty buffer is %u!\n", frames);
-        ok(broken(data == (void*)0xdeadf00d) || /* <= win8 */
-                data == NULL, "No data changed to %p\n", data);
-    }
+        ok(next_packet_size == frames, "GetNextPacketSize returns %u, GetBuffer returns %u frames\n",
+                next_packet_size, frames);
+        ok(padding >= frames, "GetCurrentPadding returns %u, GetBuffer returns %u frames\n",
+                padding, frames);

-    trace("Wait'ed position %d pad %u flags %lx, amount of frames locked: %u\n",
-          hr==S_OK ? (UINT)pos : -1, pad, flags, frames);
+        if (flags & AUDCLNT_BUFFERFLAGS_DATA_DISCONTINUITY)
+        {
+            if (idx == 0)
+                data->discontinuity_at_0 = TRUE;
+            else
+                data->discontinuity_at_later = TRUE;
+        }

-    hr = IAudioCaptureClient_GetNextPacketSize(acc, &next);
-    ok(hr == S_OK, "IAudioCaptureClient_GetNextPacketSize returns %08lx\n", hr);
-    ok(next == frames, "GetNextPacketSize %u vs. GetBuffer %u\n", next, frames);
+        if (data->expected_dev_pos != UINT64_MAX)
+        {
+            /* Win <= 8 sometimes handle discontinuities incorrectly. */
+            ok(dev_pos >= data->expected_dev_pos || broken(is_broken),
+                    "GetBuffer returns %llu device position, expected at least %llu\n",
+                    dev_pos, data->expected_dev_pos);
+            if (!(flags & AUDCLNT_BUFFERFLAGS_DATA_DISCONTINUITY))
+                ok(dev_pos == data->expected_dev_pos || broken(is_broken),
+                        "GetBuffer returns %llu device position, expected %llu\n",
+                        dev_pos, data->expected_dev_pos);
+        }

-    hr = IAudioCaptureClient_ReleaseBuffer(acc, frames);
-    ok(hr == S_OK, "Releasing buffer returns %08lx\n", hr);
+        ptr = (void*)0xdeadf00ddeadf00d;
+        flags2 = 0xdeadf11d;
+        dev_pos2 = 0xdeadf22ddeadf22d;
+        qpc_pos2 = 0xdeadf33ddeadf33d;
+        hr = IAudioCaptureClient_GetBuffer(acc, &ptr, &frames2, &flags2, &dev_pos2, &qpc_pos2);
+        ok(hr == AUDCLNT_E_OUT_OF_ORDER, "Second GetBuffer returns %08lx\n", hr);
+        ok(broken(is_broken && (uintptr_t)ptr == (uintptr_t)0xdeadf00ddeadf00d) || /* <= win8 */
+                !ptr, "Unexpected data after second GetBuffer: %p\n", ptr);
+        ok(flags2 == 0xdeadf11d, "Unexpected flags after second GetBuffer: %08lx\n", flags2);
+        ok(dev_pos2 == 0xdeadf22ddeadf22d, "Unexpected device position after second GetBuffer: %llu\n", dev_pos2);
+        ok(qpc_pos2 == 0xdeadf33ddeadf33d, "Unexpected QPC position after second GetBuffer: %llu\n", qpc_pos2);

-    hr = IAudioCaptureClient_ReleaseBuffer(acc, 0);
-    ok(hr == S_OK, "Releasing 0 returns %08lx\n", hr);
+        hr = IAudioCaptureClient_ReleaseBuffer(acc, 0);
+        ok(hr == S_OK, "Releasing buffer returns %08lx\n", hr);

-    hr = IAudioCaptureClient_GetNextPacketSize(acc, &next);
-    ok(hr == S_OK, "IAudioCaptureClient_GetNextPacketSize returns %08lx\n", hr);
+        hr = IAudioCaptureClient_ReleaseBuffer(acc, 0);
+        ok(hr == S_OK, "Releasing buffer again returns %08lx\n", hr);

-    if (frames) {
         hr = IAudioCaptureClient_ReleaseBuffer(acc, frames);
-        ok(hr == AUDCLNT_E_OUT_OF_ORDER, "Releasing buffer twice returns %08lx\n", hr);
-        sum += frames;
-    }
-
-    Sleep(350); /* for sure there's data now */
+        ok(hr == AUDCLNT_E_OUT_OF_ORDER, "Releasing buffer again returns %08lx\n", hr);

-    hr = IAudioClient_GetCurrentPadding(ac, &pad);
-    ok(hr == S_OK, "GetCurrentPadding call returns %08lx\n", hr);
+        hr = IAudioCaptureClient_GetBuffer(acc, &ptr, &frames2, &flags2, &dev_pos2, &qpc_pos2);
+        ok(hr == S_OK, "GetBuffer returns %08lx\n", hr);

-    /** GetNextPacketSize
-     * returns either 0 or one period worth of frames
-     * whereas GetCurrentPadding grows when input is not consumed. */
-    hr = IAudioCaptureClient_GetNextPacketSize(acc, &next);
-    ok(hr == S_OK, "IAudioCaptureClient_GetNextPacketSize returns %08lx\n", hr);
-    flaky_wine
-    ok(next <  pad, "GetNextPacketSize %u vs. GCP %u\n", next, pad);
+        ok(frames == frames2, "First GetBuffer returns %u frames, second GetBuffer returns %u\n",
+                frames, frames2);
+        ok(flags == flags2, "First GetBuffer returns %08lx flags, second GetBuffer returns %08lx\n",
+                flags, flags2);
+        ok(dev_pos == dev_pos2, "First GetBuffer returns %llu device position, second GetBuffer returns %llu\n",
+                dev_pos, dev_pos2);
+        /* Works with Pulse, but fails with ALSA and CoreAudio. */
+        todo_wine_if(qpc_pos != qpc_pos2)
+        ok(qpc_pos == qpc_pos2, "First GetBuffer returns %llu device QPC, second GetBuffer returns %llu\n",
+                qpc_pos, qpc_pos2);

-    hr = IAudioCaptureClient_GetBuffer(acc, &data, &frames, &flags, &pos, &qpc);
-    flaky_wine
-    ok(hr == S_OK, "Valid IAudioCaptureClient_GetBuffer returns %08lx\n", hr);
-    ok(next == frames, "GetNextPacketSize %u vs. GetBuffer %u\n", next, frames);
+        hr = IAudioCaptureClient_ReleaseBuffer(acc, frames - 1);
+        ok(hr == AUDCLNT_E_INVALID_SIZE, "Releasing buffer with the wrong frame count returns %08lx\n", hr);

-    if(hr == S_OK){
-        UINT32 frames2 = frames;
-        UINT64 pos2, qpc2;
-        ok(frames, "Amount of frames locked is 0!\n");
-        ok(pos == sum, "Position %u expected %u\n", (UINT)pos, sum);
+        hr = IAudioCaptureClient_ReleaseBuffer(acc, frames);
+        ok(hr == S_OK, "Releasing buffer returns %08lx\n", hr);

hr = IAudioCaptureClient_ReleaseBuffer(acc, 0);
-        ok(hr == S_OK, "Releasing 0 returns %08lx\n", hr);
-
-        /* GCP did not decrement, no data consumed */
-        hr = IAudioClient_GetCurrentPadding(ac, &frames);
-        ok(hr == S_OK, "GetCurrentPadding call returns %08lx\n", hr);
-        ok(frames == pad || frames == pad + next /* concurrent feeder */,
-           "GCP %u past ReleaseBuffer(0) initially %u\n", frames, pad);
-
-        /* should re-get the same data */
-        hr = IAudioCaptureClient_GetBuffer(acc, &data, &frames, &flags, &pos2, &qpc2);
-        ok(hr == S_OK, "Valid IAudioCaptureClient_GetBuffer returns %08lx\n", hr);
-        ok(frames2 == frames, "GetBuffer after ReleaseBuffer(0) %u/%u\n", frames2, frames);
-        ok(pos2 == pos, "Position after ReleaseBuffer(0) %u/%u\n", (UINT)pos2, (UINT)pos);
-        todo_wine_if(qpc2 != qpc)
-            /* FIXME: Some drivers fail */
-            ok(qpc2 == qpc, "HPC after ReleaseBuffer(0) %u vs. %u\n", (UINT)qpc2, (UINT)qpc);
-    }
-
-    /* trace after the GCP test because log output to MS-DOS console disturbs timing */
-    trace("Sleep.1 position %d pad %u flags %lx, amount of frames locked: %u\n",
-          hr==S_OK ? (UINT)pos : -1, pad, flags, frames);
-
-    if(hr == S_OK){
-        UINT32 frames2 = 0xabadcafe;
-        BYTE *data2 = (void*)0xdeadf00d;
-        flags = 0xabadcafe;
-
-        ok(pos == sum, "Position %u expected %u\n", (UINT)pos, sum);
+        ok(hr == S_OK, "Releasing buffer again returns %08lx\n", hr);

-        pos = qpc = 0xdeadbeef;
-        hr = IAudioCaptureClient_GetBuffer(acc, &data2, &frames2, &flags, &pos, &qpc);
-        ok(hr == AUDCLNT_E_OUT_OF_ORDER, "Out of order IAudioCaptureClient_GetBuffer returns %08lx\n", hr);
-        ok(frames2 == 0xabadcafe, "Out of order frames changed to %x\n", frames2);
-        ok(broken(data2 == (void*)0xdeadf00d) /* <= win8 */ ||
-                data2 == NULL, "Out of order data changed to %p\n", data2);
-        ok(flags == 0xabadcafe, "Out of order flags changed to %lx\n", flags);
-        ok(pos == 0xdeadbeef, "Out of order position changed to %x\n", (UINT)pos);
-        ok(qpc == 0xdeadbeef, "Out of order timer changed to %x\n", (UINT)qpc);
+        data->expected_dev_pos = dev_pos + frames;

-        hr = IAudioCaptureClient_ReleaseBuffer(acc, frames+1);
-        ok(hr == AUDCLNT_E_INVALID_SIZE, "Releasing buffer+1 returns %08lx\n", hr);
+        ++idx;

-        hr = IAudioCaptureClient_ReleaseBuffer(acc, 1);
-        ok(hr == AUDCLNT_E_INVALID_SIZE, "Releasing 1 returns %08lx\n", hr);
-
-        hr = IAudioClient_Reset(ac);
-        ok(hr == AUDCLNT_E_NOT_STOPPED, "Reset failed: %08lx\n", hr);
+        winetest_pop_context();
     }
+}

-    hr = IAudioCaptureClient_ReleaseBuffer(acc, frames);
-    ok(hr == S_OK, "Releasing buffer returns %08lx\n", hr);
+static void test_capture(IAudioClient *ac, HANDLE handle, WAVEFORMATEX *wfx)
+{
+    struct read_packets_data data;
+    IAudioCaptureClient *acc;
+    BOOL is_broken;
+    UINT32 frames;
+    DWORD flags;
+    HRESULT hr;
+    BYTE *ptr;

-    if (frames) {
-        sum += frames;
-        hr = IAudioCaptureClient_ReleaseBuffer(acc, frames);
-        ok(hr == AUDCLNT_E_OUT_OF_ORDER, "Releasing buffer twice returns %08lx\n", hr);
-    }
+    hr = IAudioClient_GetService(ac, &IID_IAudioCaptureClient, (void**)&acc);
+    ok(hr == S_OK, "IAudioClient_GetService(IID_IAudioCaptureClient) returns %08lx\n", hr);
+    if (hr != S_OK)
+        return;
+
+    hr = IAudioClient_Start(ac);
+    ok(hr == S_OK, "Start on a stopped stream returns %08lx\n", hr);

-    frames = period;
-    flaky_wine
-    ok(next == frames, "GetNextPacketSize %u vs. GetDevicePeriod %u\n", next, frames);
+    hr = IAudioCaptureClient_GetNextPacketSize(acc, NULL);
+    ok(hr == E_POINTER, "IAudioCaptureClient_GetNextPacketSize(NULL) returns %08lx\n", hr);

-    /* GetBufferSize is not a multiple of the period size! */
-    hr = IAudioClient_GetBufferSize(ac, &next);
-    ok(hr == S_OK, "GetBufferSize failed: %08lx\n", hr);
-    trace("GetBufferSize %u period size %u\n", next, frames);
+    ptr = (void*)0xdeadf00d;
+    frames = 0xdeadbeef;
+    flags = 0xabadcafe;
+    hr = IAudioCaptureClient_GetBuffer(acc, &ptr, NULL, NULL, NULL, NULL);
+    ok(hr == E_POINTER, "IAudioCaptureClient_GetBuffer(data, NULL, NULL) returns %08lx\n", hr);

-    Sleep(400); /* overrun */
+    hr = IAudioCaptureClient_GetBuffer(acc, NULL, &frames, NULL, NULL, NULL);
+    ok(hr == E_POINTER, "IAudioCaptureClient_GetBuffer(NULL, &frames, NULL) returns %08lx\n", hr);

-    hr = IAudioClient_GetCurrentPadding(ac, &pad);
-    ok(hr == S_OK, "GetCurrentPadding call returns %08lx\n", hr);
+    hr = IAudioCaptureClient_GetBuffer(acc, NULL, NULL, &flags, NULL, NULL);
+    ok(hr == E_POINTER, "IAudioCaptureClient_GetBuffer(NULL, NULL, &flags) returns %08lx\n", hr);

-    hr = IAudioCaptureClient_GetBuffer(acc, &data, &frames, &flags, &pos, &qpc);
-    flaky_wine
-    ok(hr == S_OK, "Valid IAudioCaptureClient_GetBuffer returns %08lx\n", hr);
+    hr = IAudioCaptureClient_GetBuffer(acc, &ptr, &frames, NULL, NULL, NULL);
+    ok(hr == E_POINTER, "IAudioCaptureClient_GetBuffer(&ata, &frames, NULL) returns %08lx\n", hr);
+    is_broken = (uintptr_t)ptr == 0xdeadf00d;   /* <= win8 */
+    ok(broken(is_broken) || ptr == NULL, "data is reset to %p\n", ptr);
+    ok(frames == 0xdeadbeef, "frames is reset to %08x\n", frames);
+    ok(flags == 0xabadcafe, "flags is reset to %08lx\n", flags);

-    trace("Overrun position %d pad %u flags %lx, amount of frames locked: %u\n",
-          hr==S_OK ? (UINT)pos : -1, pad, flags, frames);
+    data.expected_dev_pos = UINT64_MAX;

-    if(hr == S_OK){
-        if(flags & AUDCLNT_BUFFERFLAGS_DATA_DISCONTINUITY){
-            /* Native's position is one period further than what we read.
-             * Perhaps that's precisely the meaning of DATA_DISCONTINUITY:
-             * signal when the position jump left a gap. */
-            ok(pos >= sum + frames, "Position %u last %u frames %u\n", (UINT)pos, sum, frames);
-            sum = pos;
-        }else{ /* win10 */
-            ok(pos == sum, "Position %u last %u frames %u\n", (UINT)pos, sum, frames);
-        }
+    winetest_push_context("read 10 packets");

-        ok(pad == next, "GCP %u vs. BufferSize %u\n", (UINT32)pad, next);
-    }
+    read_packets(ac, acc, handle, 10, &data, is_broken);

-    hr = IAudioCaptureClient_ReleaseBuffer(acc, frames);
-    ok(hr == S_OK, "Releasing buffer returns %08lx\n", hr);
-    sum += frames;
+    todo_wine
+    ok(data.discontinuity_at_0, "No discontinuity at first packet\n");
+    ok(!data.discontinuity_at_later, "Discontinuity at later packet\n");

-    hr = IAudioClient_GetCurrentPadding(ac, &pad);
-    ok(hr == S_OK, "GetCurrentPadding call returns %08lx\n", hr);
+    winetest_pop_context();
+    winetest_push_context("sleep and read 10 packets");

-    hr = IAudioCaptureClient_GetBuffer(acc, &data, &frames, &flags, &pos, &qpc);
-    flaky_wine
-    ok(hr == S_OK, "Valid IAudioCaptureClient_GetBuffer returns %08lx\n", hr);
+    /* Wait a bit, but not enough to fill the buffer, so we shouldn't miss anything. */
+    Sleep(100);

-    trace("Cont'ed position %d pad %u flags %lx, amount of frames locked: %u\n",
-          hr==S_OK ? (UINT)pos : -1, pad, flags, frames);
+    read_packets(ac, acc, handle, 10, &data, is_broken);

-    if(hr == S_OK){
-        flaky_wine
-        ok(pos == sum, "Position %u expected %u\n", (UINT)pos, sum);
-        flaky_wine
-        ok(!flags, "flags %lu\n", flags);
+    ok(!data.discontinuity_at_0, "Discontinuity at first packet\n");
+    ok(!data.discontinuity_at_later, "Discontinuity at later packet\n");

-        hr = IAudioCaptureClient_ReleaseBuffer(acc, frames);
-        ok(hr == S_OK, "Releasing buffer returns %08lx\n", hr);
-        sum += frames;
-    }
+    winetest_pop_context();
+    winetest_push_context("stop, start and read 10 packets");

hr = IAudioClient_Stop(ac);
     ok(hr == S_OK, "Stop on a started stream returns %08lx\n", hr);

+    hr = IAudioClient_Stop(ac);
+    ok(hr == S_FALSE, "Stop on a stopped stream returns %08lx\n", hr);
+
     hr = IAudioClient_Start(ac);
     ok(hr == S_OK, "Start on a stopped stream returns %08lx\n", hr);

-    hr = IAudioCaptureClient_GetBuffer(acc, &data, &frames, &flags, &pos, &qpc);
-    flaky_wine
-    ok(hr == S_OK, "Valid IAudioCaptureClient_GetBuffer returns %08lx\n", hr);
+    hr = IAudioClient_Start(ac);
+    ok(hr == AUDCLNT_E_NOT_STOPPED, "Start on a started stream returns %08lx\n", hr);

-    hr = IAudioClient_GetCurrentPadding(ac, &pad);
-    ok(hr == S_OK, "GetCurrentPadding call returns %08lx\n", hr);
+    read_packets(ac, acc, handle, 10, &data, is_broken);

-    trace("Restart position %d pad %u flags %lx, amount of frames locked: %u\n",
-          hr==S_OK ? (UINT)pos : -1, pad, flags, frames);
-    flaky_wine
-    ok(pad > sum, "restarted GCP %u\n", pad); /* GCP is still near buffer size */
+    ok(!data.discontinuity_at_0, "Discontinuity at first packet\n");
+    ok(!data.discontinuity_at_later, "Discontinuity at later packet\n");

-    if(frames){
-        flaky_wine
-        ok(pos == sum, "Position %u expected %u\n", (UINT)pos, sum);
-        ok(!flags, "flags %lu\n", flags);
+    winetest_pop_context();
+    winetest_push_context("stop, reset, start and read 10 packets");

-        hr = IAudioCaptureClient_ReleaseBuffer(acc, frames);
-        ok(hr == S_OK, "Releasing buffer returns %08lx\n", hr);
-        sum += frames;
-    }
+    hr = IAudioClient_Reset(ac);
+    ok(hr == AUDCLNT_E_NOT_STOPPED, "Reset on a started stream returns %08lx\n", hr);

hr = IAudioClient_Stop(ac);
     ok(hr == S_OK, "Stop on a started stream returns %08lx\n", hr);

hr = IAudioClient_Reset(ac);
     ok(hr == S_OK, "Reset on a stopped stream returns %08lx\n", hr);
-    sum += pad - frames;

-    hr = IAudioClient_GetCurrentPadding(ac, &pad);
-    ok(hr == S_OK, "GetCurrentPadding call returns %08lx\n", hr);
-    ok(!pad, "reset GCP %u\n", pad);
+    hr = IAudioClient_Start(ac);
+    ok(hr == S_OK, "Start on a stopped stream returns %08lx\n", hr);

-    flags = 0xabadcafe;
-    hr = IAudioCaptureClient_GetBuffer(acc, &data, &frames, &flags, &pos, &qpc);
-    ok(hr == AUDCLNT_S_BUFFER_EMPTY,
-       "Initial IAudioCaptureClient_GetBuffer returns %08lx\n", hr);
+    /* Device position is lost when resetting. */
+    data.expected_dev_pos = UINT64_MAX;

-    trace("Reset   position %d pad %u flags %lx, amount of frames locked: %u\n",
-          hr==S_OK ? (UINT)pos : -1, pad, flags, frames);
+    read_packets(ac, acc, handle, 10, &data, is_broken);

-    if(SUCCEEDED(hr))
-        IAudioCaptureClient_ReleaseBuffer(acc, frames);
+    ok(!data.discontinuity_at_0, "Discontinuity at first packet\n");
+    ok(!data.discontinuity_at_later, "Discontinuity at later packet\n");

-    hr = IAudioClient_Start(ac);
-    ok(hr == S_OK, "Start on a stopped stream returns %08lx\n", hr);
+    winetest_pop_context();
+    winetest_push_context("overrun buffer and read many packets");

-    Sleep(180);
+    /* Now wait too much, to overrun the buffer. By swallowing enough packets
+     * we should eventually reach a discontinuity. We have a 500 ms buffer and
+     * normally the period is 10 ms, so 50 packets should be enough. Let's take
+     * a few more to stay safe. */
+    Sleep(600);

-    hr = IAudioClient_GetCurrentPadding(ac, &pad);
-    ok(hr == S_OK, "GetCurrentPadding call returns %08lx\n", hr);
+    read_packets(ac, acc, handle, 75, &data, is_broken);

-    hr = IAudioCaptureClient_GetBuffer(acc, &data, &frames, &flags, &pos, &qpc);
-    flaky_wine
-    ok(hr == S_OK, "Valid IAudioCaptureClient_GetBuffer returns %08lx\n", hr);
-    trace("Running position %d pad %u flags %lx, amount of frames locked: %u\n",
-          SUCCEEDED(hr) ? (UINT)pos : -1, pad, flags, frames);
+    /* Works with Pulse, but fails with ALSA and CoreAudio. */
+    todo_wine_if(!data.discontinuity_at_0 && !data.discontinuity_at_later)
+    ok(data.discontinuity_at_0 || data.discontinuity_at_later, "No discontinuity\n");

-    if(SUCCEEDED(hr)){
-        /* Some w7 machines signal DATA_DISCONTINUITY here following the
-         * previous AUDCLNT_S_BUFFER_EMPTY, others not.  What logic? */
-        ok(pos >= sum, "Position %u gap %d\n", (UINT)pos, (UINT)pos - sum);
-        IAudioCaptureClient_ReleaseBuffer(acc, frames);
-    }
+    winetest_pop_context();

IAudioCaptureClient_Release(acc);
 }