AudioTrackShared.cpp revision ee499291404a192b059f2e04c5afc65aa6cdd74c
1a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten/* 2a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * Copyright (C) 2007 The Android Open Source Project 3a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * 4a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * Licensed under the Apache License, Version 2.0 (the "License"); 5a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * you may not use this file except in compliance with the License. 6a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * You may obtain a copy of the License at 7a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * 8a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * http://www.apache.org/licenses/LICENSE-2.0 9a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * 10a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * Unless required by applicable law or agreed to in writing, software 11a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * distributed under the License is distributed on an "AS IS" BASIS, 12a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * See the License for the specific language governing permissions and 14a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten * limitations under the License. 15a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten */ 16a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 17a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten#define LOG_TAG "AudioTrackShared" 18a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten//#define LOG_NDEBUG 0 19a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 20a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten#include <private/media/AudioTrackShared.h> 21a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten#include <utils/Log.h> 22ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes 23ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes#include <linux/futex.h> 24ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes#include <sys/syscall.h> 25a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 26a8190fc518b6769257896605f3aee091aeb60b50Glenn Kastennamespace android { 27a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 28a8190fc518b6769257896605f3aee091aeb60b50Glenn Kastenaudio_track_cblk_t::audio_track_cblk_t() 29f20e1d8df84c5fbeeace0052d100982ae39bb7a4Glenn Kasten : mServer(0), frameCount_(0), mFutex(0), mMinimum(0), 30d054c32443a493513ab63529b0c8b1aca290278cGlenn Kasten mVolumeLR(0x10001000), mSampleRate(0), mSendLevel(0), mFlags(0) 31a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten{ 329f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten memset(&u, 0, sizeof(u)); 33a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten} 34a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 359f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// --------------------------------------------------------------------------- 369f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 379f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn KastenProxy::Proxy(audio_track_cblk_t* cblk, void *buffers, size_t frameCount, size_t frameSize, 389f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten bool isOut, bool clientInServer) 399f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten : mCblk(cblk), mBuffers(buffers), mFrameCount(frameCount), mFrameSize(frameSize), 409f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mFrameCountP2(roundup(frameCount)), mIsOut(isOut), mClientInServer(clientInServer), 417db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten mIsShutdown(false), mUnreleased(0) 42a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten{ 439f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 44a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 459f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// --------------------------------------------------------------------------- 469f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 479f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn KastenClientProxy::ClientProxy(audio_track_cblk_t* cblk, void *buffers, size_t frameCount, 489f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t frameSize, bool isOut, bool clientInServer) 499f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten : Proxy(cblk, buffers, frameCount, frameSize, isOut, clientInServer), mEpoch(0) 509f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 519f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 529f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 539f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenconst struct timespec ClientProxy::kForever = {INT_MAX /*tv_sec*/, 0 /*tv_nsec*/}; 549f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenconst struct timespec ClientProxy::kNonBlocking = {0 /*tv_sec*/, 0 /*tv_nsec*/}; 559f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 569f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten#define MEASURE_NS 10000000 // attempt to provide accurate timeouts if requested >= MEASURE_NS 579f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 589f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// To facilitate quicker recovery from server failure, this value limits the timeout per each futex 599f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// wait. However it does not protect infinite timeouts. If defined to be zero, there is no limit. 609f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// FIXME May not be compatible with audio tunneling requirements where timeout should be in the 619f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// order of minutes. 629f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten#define MAX_SEC 5 639f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 649f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenstatus_t ClientProxy::obtainBuffer(Buffer* buffer, const struct timespec *requested, 659f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten struct timespec *elapsed) 669f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 677db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten LOG_ALWAYS_FATAL_IF(buffer == NULL || buffer->mFrameCount == 0); 689f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten struct timespec total; // total elapsed time spent waiting 699f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten total.tv_sec = 0; 709f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten total.tv_nsec = 0; 719f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten bool measure = elapsed != NULL; // whether to measure total elapsed time spent waiting 72a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 739f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status_t status; 749f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten enum { 759f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten TIMEOUT_ZERO, // requested == NULL || *requested == 0 769f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten TIMEOUT_INFINITE, // *requested == infinity 779f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten TIMEOUT_FINITE, // 0 < *requested < infinity 789f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten TIMEOUT_CONTINUE, // additional chances after TIMEOUT_FINITE 799f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } timeout; 809f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (requested == NULL) { 819f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten timeout = TIMEOUT_ZERO; 829f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else if (requested->tv_sec == 0 && requested->tv_nsec == 0) { 839f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten timeout = TIMEOUT_ZERO; 849f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else if (requested->tv_sec == INT_MAX) { 859f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten timeout = TIMEOUT_INFINITE; 869f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 879f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten timeout = TIMEOUT_FINITE; 889f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (requested->tv_sec > 0 || requested->tv_nsec >= MEASURE_NS) { 899f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten measure = true; 909f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 919f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 929f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten struct timespec before; 939f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten bool beforeIsValid = false; 949f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_track_cblk_t* cblk = mCblk; 959f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten bool ignoreInitialPendingInterrupt = true; 969f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // check for shared memory corruption 979f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsShutdown) { 989f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status = NO_INIT; 999f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten goto end; 1009f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1019f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten for (;;) { 10296f60d8f04432a1ed503b3e24d5736d28c63c9a2Glenn Kasten int32_t flags = android_atomic_and(~CBLK_INTERRUPT, &cblk->mFlags); 1039f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // check for track invalidation by server, or server death detection 1049f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (flags & CBLK_INVALID) { 1059f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ALOGV("Track invalidated"); 1069f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status = DEAD_OBJECT; 1079f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten goto end; 1089f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1099f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // check for obtainBuffer interrupted by client 1109f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (!ignoreInitialPendingInterrupt && (flags & CBLK_INTERRUPT)) { 1119f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ALOGV("obtainBuffer() interrupted by client"); 1129f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status = -EINTR; 1139f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten goto end; 1149f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1159f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ignoreInitialPendingInterrupt = false; 1169f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // compute number of frames available to write (AudioTrack) or read (AudioRecord) 1179f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int32_t front; 1189f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int32_t rear; 1199f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsOut) { 1209f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // The barrier following the read of mFront is probably redundant. 1219f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // We're about to perform a conditional branch based on 'filled', 1229f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // which will force the processor to observe the read of mFront 1239f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // prior to allowing data writes starting at mRaw. 1249f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // However, the processor may support speculative execution, 1259f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // and be unable to undo speculative writes into shared memory. 1269f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // The barrier will prevent such speculative execution. 1279f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten front = android_atomic_acquire_load(&cblk->u.mStreaming.mFront); 1289f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten rear = cblk->u.mStreaming.mRear; 1299f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 1309f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // On the other hand, this barrier is required. 1319f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten rear = android_atomic_acquire_load(&cblk->u.mStreaming.mRear); 1329f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten front = cblk->u.mStreaming.mFront; 1339f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1349f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ssize_t filled = rear - front; 1359f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // pipe should not be overfull 1369f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (!(0 <= filled && (size_t) filled <= mFrameCount)) { 1379f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ALOGE("Shared memory control block is corrupt (filled=%d); shutting down", filled); 1389f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mIsShutdown = true; 1399f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status = NO_INIT; 1409f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten goto end; 1419f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1429f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // don't allow filling pipe beyond the nominal size 1439f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t avail = mIsOut ? mFrameCount - filled : filled; 1449f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (avail > 0) { 1459f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // 'avail' may be non-contiguous, so return only the first contiguous chunk 1469f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t part1; 1479f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsOut) { 1489f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten rear &= mFrameCountP2 - 1; 1499f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten part1 = mFrameCountP2 - rear; 1509f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 1519f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten front &= mFrameCountP2 - 1; 1529f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten part1 = mFrameCountP2 - front; 1539f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1549f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (part1 > avail) { 1559f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten part1 = avail; 1569f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1579f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (part1 > buffer->mFrameCount) { 1589f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten part1 = buffer->mFrameCount; 1599f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1609f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mFrameCount = part1; 1619f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mRaw = part1 > 0 ? 1629f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten &((char *) mBuffers)[(mIsOut ? rear : front) * mFrameSize] : NULL; 1639f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mNonContig = avail - part1; 1647db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten mUnreleased = part1; 1659f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status = NO_ERROR; 1669f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten break; 1679f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1689f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten struct timespec remaining; 1699f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten const struct timespec *ts; 1709f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten switch (timeout) { 1719f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten case TIMEOUT_ZERO: 1729f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status = WOULD_BLOCK; 1739f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten goto end; 1749f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten case TIMEOUT_INFINITE: 1759f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ts = NULL; 1769f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten break; 1779f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten case TIMEOUT_FINITE: 1789f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten timeout = TIMEOUT_CONTINUE; 1799f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (MAX_SEC == 0) { 1809f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ts = requested; 1819f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten break; 1829f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1839f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // fall through 1849f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten case TIMEOUT_CONTINUE: 1859f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // FIXME we do not retry if requested < 10ms? needs documentation on this state machine 1869f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (!measure || requested->tv_sec < total.tv_sec || 1879f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten (requested->tv_sec == total.tv_sec && requested->tv_nsec <= total.tv_nsec)) { 1889f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten status = TIMED_OUT; 1899f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten goto end; 1909f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1919f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten remaining.tv_sec = requested->tv_sec - total.tv_sec; 1929f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if ((remaining.tv_nsec = requested->tv_nsec - total.tv_nsec) < 0) { 1939f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten remaining.tv_nsec += 1000000000; 1949f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten remaining.tv_sec++; 1959f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 1969f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (0 < MAX_SEC && MAX_SEC < remaining.tv_sec) { 1979f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten remaining.tv_sec = MAX_SEC; 1989f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten remaining.tv_nsec = 0; 1999f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 2009f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ts = &remaining; 2019f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten break; 2029f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten default: 203b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald LOG_FATAL("obtainBuffer() timeout=%d", timeout); 2049f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ts = NULL; 2059f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten break; 2069f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 2070d09a9bec07b3bec78bd473ff0bfcf0a261f3f25Glenn Kasten int32_t old = android_atomic_and(~CBLK_FUTEX_WAKE, &cblk->mFutex); 2080d09a9bec07b3bec78bd473ff0bfcf0a261f3f25Glenn Kasten if (!(old & CBLK_FUTEX_WAKE)) { 2099f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (measure && !beforeIsValid) { 2109f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten clock_gettime(CLOCK_MONOTONIC, &before); 2119f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten beforeIsValid = true; 2129f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 213ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes errno = 0; 214ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes (void) syscall(__NR_futex, &cblk->mFutex, 2150d09a9bec07b3bec78bd473ff0bfcf0a261f3f25Glenn Kasten mClientInServer ? FUTEX_WAIT_PRIVATE : FUTEX_WAIT, old & ~CBLK_FUTEX_WAKE, ts); 2169f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // update total elapsed time spent waiting 2179f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (measure) { 2189f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten struct timespec after; 2199f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten clock_gettime(CLOCK_MONOTONIC, &after); 2209f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten total.tv_sec += after.tv_sec - before.tv_sec; 2219f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten long deltaNs = after.tv_nsec - before.tv_nsec; 2229f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (deltaNs < 0) { 2239f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten deltaNs += 1000000000; 2249f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten total.tv_sec--; 2259f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 2269f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if ((total.tv_nsec += deltaNs) >= 1000000000) { 2279f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten total.tv_nsec -= 1000000000; 2289f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten total.tv_sec++; 2299f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 2309f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten before = after; 2319f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten beforeIsValid = true; 2329f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 233ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes switch (errno) { 234ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes case 0: // normal wakeup by server, or by binderDied() 235ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes case EWOULDBLOCK: // benign race condition with server 236ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes case EINTR: // wait was interrupted by signal or other spurious wakeup 237ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes case ETIMEDOUT: // time-out expired 2387db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten // FIXME these error/non-0 status are being dropped 2399f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten break; 2409f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten default: 241ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes status = errno; 242ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes ALOGE("%s unexpected error %s", __func__, strerror(status)); 2439f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten goto end; 2449f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 245a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 246a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 247a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 2489f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenend: 2499f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (status != NO_ERROR) { 2509f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mFrameCount = 0; 2519f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mRaw = NULL; 2529f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mNonContig = 0; 2537db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten mUnreleased = 0; 2549f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 2559f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (elapsed != NULL) { 2569f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten *elapsed = total; 257a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 2589f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (requested == NULL) { 2599f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten requested = &kNonBlocking; 2609f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 2619f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (measure) { 262b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald ALOGV("requested %ld.%03ld elapsed %ld.%03ld", 263b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald requested->tv_sec, requested->tv_nsec / 1000000, 264b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald total.tv_sec, total.tv_nsec / 1000000); 2659f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 2669f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return status; 2679f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 268a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 2699f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenvoid ClientProxy::releaseBuffer(Buffer* buffer) 2709f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 2717db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten LOG_ALWAYS_FATAL_IF(buffer == NULL); 2729f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t stepCount = buffer->mFrameCount; 2737db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten if (stepCount == 0 || mIsShutdown) { 2747db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten // prevent accidental re-use of buffer 2757db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten buffer->mFrameCount = 0; 2767db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten buffer->mRaw = NULL; 2777db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten buffer->mNonContig = 0; 2789f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return; 2799f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 2807db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten LOG_ALWAYS_FATAL_IF(!(stepCount <= mUnreleased && mUnreleased <= mFrameCount)); 2817db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten mUnreleased -= stepCount; 2829f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_track_cblk_t* cblk = mCblk; 2839f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // Both of these barriers are required 2849f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsOut) { 2859f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int32_t rear = cblk->u.mStreaming.mRear; 2869f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten android_atomic_release_store(stepCount + rear, &cblk->u.mStreaming.mRear); 2879f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 2889f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int32_t front = cblk->u.mStreaming.mFront; 2899f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten android_atomic_release_store(stepCount + front, &cblk->u.mStreaming.mFront); 2909f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 291a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten} 292a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 2939f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenvoid ClientProxy::binderDied() 294a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten{ 2959f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_track_cblk_t* cblk = mCblk; 29696f60d8f04432a1ed503b3e24d5736d28c63c9a2Glenn Kasten if (!(android_atomic_or(CBLK_INVALID, &cblk->mFlags) & CBLK_INVALID)) { 2979f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // it seems that a FUTEX_WAKE_PRIVATE will not wake a FUTEX_WAIT, even within same process 298ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes (void) syscall(__NR_futex, &cblk->mFutex, mClientInServer ? FUTEX_WAKE_PRIVATE : FUTEX_WAKE, 299ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes 1); 3009f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 3019f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 302a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 3039f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenvoid ClientProxy::interrupt() 3049f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 3059f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_track_cblk_t* cblk = mCblk; 30696f60d8f04432a1ed503b3e24d5736d28c63c9a2Glenn Kasten if (!(android_atomic_or(CBLK_INTERRUPT, &cblk->mFlags) & CBLK_INTERRUPT)) { 307ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes (void) syscall(__NR_futex, &cblk->mFutex, mClientInServer ? FUTEX_WAKE_PRIVATE : FUTEX_WAKE, 308ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes 1); 309a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 3109f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 311a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 3129f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastensize_t ClientProxy::getMisalignment() 3139f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 3149f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_track_cblk_t* cblk = mCblk; 3159f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return (mFrameCountP2 - (mIsOut ? cblk->u.mStreaming.mRear : cblk->u.mStreaming.mFront)) & 3169f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten (mFrameCountP2 - 1); 3179f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 318a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 319cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurentsize_t ClientProxy::getFramesFilled() { 320cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent audio_track_cblk_t* cblk = mCblk; 321cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent int32_t front; 322cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent int32_t rear; 323cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent 324cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent if (mIsOut) { 325cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent front = android_atomic_acquire_load(&cblk->u.mStreaming.mFront); 326cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent rear = cblk->u.mStreaming.mRear; 327cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent } else { 328cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent rear = android_atomic_acquire_load(&cblk->u.mStreaming.mRear); 329cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent front = cblk->u.mStreaming.mFront; 330cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent } 331cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent ssize_t filled = rear - front; 332cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent // pipe should not be overfull 333cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent if (!(0 <= filled && (size_t) filled <= mFrameCount)) { 334cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent ALOGE("Shared memory control block is corrupt (filled=%d); shutting down", filled); 335cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent return 0; 336cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent } 337cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent return (size_t)filled; 338cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent} 339cc21e4f1e41dfa17e7e2bef995fcd22c45f6bcd0Eric Laurent 3409f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// --------------------------------------------------------------------------- 3419f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 3429f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenvoid AudioTrackClientProxy::flush() 3439f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 3449f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mCblk->u.mStreaming.mFlush++; 3459f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 3469f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 347bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurentbool AudioTrackClientProxy::clearStreamEndDone() { 34896f60d8f04432a1ed503b3e24d5736d28c63c9a2Glenn Kasten return (android_atomic_and(~CBLK_STREAM_END_DONE, &mCblk->mFlags) & CBLK_STREAM_END_DONE) != 0; 349bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurent} 350bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurent 351bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurentbool AudioTrackClientProxy::getStreamEndDone() const { 35296f60d8f04432a1ed503b3e24d5736d28c63c9a2Glenn Kasten return (mCblk->mFlags & CBLK_STREAM_END_DONE) != 0; 353bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurent} 354bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurent 355b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgeraldstatus_t AudioTrackClientProxy::waitStreamEndDone(const struct timespec *requested) 356b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald{ 357b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald struct timespec total; // total elapsed time spent waiting 358b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald total.tv_sec = 0; 359b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald total.tv_nsec = 0; 360b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald audio_track_cblk_t* cblk = mCblk; 361b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald status_t status; 362b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald enum { 363b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald TIMEOUT_ZERO, // requested == NULL || *requested == 0 364b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald TIMEOUT_INFINITE, // *requested == infinity 365b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald TIMEOUT_FINITE, // 0 < *requested < infinity 366b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald TIMEOUT_CONTINUE, // additional chances after TIMEOUT_FINITE 367b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } timeout; 368b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (requested == NULL) { 369b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald timeout = TIMEOUT_ZERO; 370b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } else if (requested->tv_sec == 0 && requested->tv_nsec == 0) { 371b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald timeout = TIMEOUT_ZERO; 372b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } else if (requested->tv_sec == INT_MAX) { 373b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald timeout = TIMEOUT_INFINITE; 374b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } else { 375b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald timeout = TIMEOUT_FINITE; 376b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 377b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald for (;;) { 37896f60d8f04432a1ed503b3e24d5736d28c63c9a2Glenn Kasten int32_t flags = android_atomic_and(~(CBLK_INTERRUPT|CBLK_STREAM_END_DONE), &cblk->mFlags); 379b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald // check for track invalidation by server, or server death detection 380b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (flags & CBLK_INVALID) { 381b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald ALOGV("Track invalidated"); 382b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald status = DEAD_OBJECT; 383b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald goto end; 384b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 385b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (flags & CBLK_STREAM_END_DONE) { 386b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald ALOGV("stream end received"); 387b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald status = NO_ERROR; 388b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald goto end; 389b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 390b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald // check for obtainBuffer interrupted by client 391b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald // check for obtainBuffer interrupted by client 392b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (flags & CBLK_INTERRUPT) { 393b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald ALOGV("waitStreamEndDone() interrupted by client"); 394b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald status = -EINTR; 395b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald goto end; 396b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 397b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald struct timespec remaining; 398b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald const struct timespec *ts; 399b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald switch (timeout) { 400b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald case TIMEOUT_ZERO: 401b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald status = WOULD_BLOCK; 402b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald goto end; 403b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald case TIMEOUT_INFINITE: 404b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald ts = NULL; 405b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald break; 406b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald case TIMEOUT_FINITE: 407b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald timeout = TIMEOUT_CONTINUE; 408b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (MAX_SEC == 0) { 409b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald ts = requested; 410b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald break; 411b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 412b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald // fall through 413b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald case TIMEOUT_CONTINUE: 414b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald // FIXME we do not retry if requested < 10ms? needs documentation on this state machine 415b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (requested->tv_sec < total.tv_sec || 416b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald (requested->tv_sec == total.tv_sec && requested->tv_nsec <= total.tv_nsec)) { 417b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald status = TIMED_OUT; 418b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald goto end; 419b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 420b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald remaining.tv_sec = requested->tv_sec - total.tv_sec; 421b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if ((remaining.tv_nsec = requested->tv_nsec - total.tv_nsec) < 0) { 422b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald remaining.tv_nsec += 1000000000; 423b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald remaining.tv_sec++; 424b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 425b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (0 < MAX_SEC && MAX_SEC < remaining.tv_sec) { 426b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald remaining.tv_sec = MAX_SEC; 427b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald remaining.tv_nsec = 0; 428b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 429b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald ts = &remaining; 430b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald break; 431b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald default: 432b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald LOG_FATAL("waitStreamEndDone() timeout=%d", timeout); 433b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald ts = NULL; 434b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald break; 435b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 436b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald int32_t old = android_atomic_and(~CBLK_FUTEX_WAKE, &cblk->mFutex); 437b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (!(old & CBLK_FUTEX_WAKE)) { 438ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes errno = 0; 439ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes (void) syscall(__NR_futex, &cblk->mFutex, 440b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald mClientInServer ? FUTEX_WAIT_PRIVATE : FUTEX_WAIT, old & ~CBLK_FUTEX_WAKE, ts); 441ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes switch (errno) { 442ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes case 0: // normal wakeup by server, or by binderDied() 443ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes case EWOULDBLOCK: // benign race condition with server 444ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes case EINTR: // wait was interrupted by signal or other spurious wakeup 445ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes case ETIMEDOUT: // time-out expired 446b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald break; 447b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald default: 448ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes status = errno; 449ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes ALOGE("%s unexpected error %s", __func__, strerror(status)); 450b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald goto end; 451b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 452b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 453b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 454b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald 455b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgeraldend: 456b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (requested == NULL) { 457b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald requested = &kNonBlocking; 458b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 459b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald return status; 460b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald} 461b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald 4629f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// --------------------------------------------------------------------------- 4639f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 4649f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn KastenStaticAudioTrackClientProxy::StaticAudioTrackClientProxy(audio_track_cblk_t* cblk, void *buffers, 4659f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t frameCount, size_t frameSize) 4669f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten : AudioTrackClientProxy(cblk, buffers, frameCount, frameSize), 4679f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mMutator(&cblk->u.mStatic.mSingleStateQueue), mBufferPosition(0) 4689f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 4699f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 4709f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 4719f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenvoid StaticAudioTrackClientProxy::flush() 4729f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 4739f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten LOG_FATAL("static flush"); 4749f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 4759f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 4769f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenvoid StaticAudioTrackClientProxy::setLoop(size_t loopStart, size_t loopEnd, int loopCount) 4779f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 478751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten // This can only happen on a 64-bit client 479751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten if (loopStart > UINT32_MAX || loopEnd > UINT32_MAX) { 480751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten // FIXME Should return an error status 481751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten return; 482751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten } 4839f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten StaticAudioTrackState newState; 484751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten newState.mLoopStart = (uint32_t) loopStart; 485751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten newState.mLoopEnd = (uint32_t) loopEnd; 4869f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten newState.mLoopCount = loopCount; 4879f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mBufferPosition = loopStart; 4889f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten (void) mMutator.push(newState); 4899f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 4909f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 4919f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastensize_t StaticAudioTrackClientProxy::getBufferPosition() 4929f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 4939f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t bufferPosition; 4949f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mMutator.ack()) { 495751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten bufferPosition = (size_t) mCblk->u.mStatic.mBufferPosition; 4969f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (bufferPosition > mFrameCount) { 4979f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten bufferPosition = mFrameCount; 498a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 4999f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 5009f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten bufferPosition = mBufferPosition; 501a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 5029f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return bufferPosition; 5039f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 5049f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 5059f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// --------------------------------------------------------------------------- 506a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 5079f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn KastenServerProxy::ServerProxy(audio_track_cblk_t* cblk, void *buffers, size_t frameCount, 5089f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t frameSize, bool isOut, bool clientInServer) 5097db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten : Proxy(cblk, buffers, frameCount, frameSize, isOut, clientInServer), 510ce8828a016b082f730152af2204b8ea3610dc1ecGlenn Kasten mAvailToClient(0), mFlush(0) 5119f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 5129f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 5139f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 5142e422c472c91aa7912befd0fc038d1e11f354bc1Glenn Kastenstatus_t ServerProxy::obtainBuffer(Buffer* buffer, bool ackFlush) 5159f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 5167db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten LOG_ALWAYS_FATAL_IF(buffer == NULL || buffer->mFrameCount == 0); 5179f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsShutdown) { 5187db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten goto no_init; 5199f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 5207db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten { 5219f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_track_cblk_t* cblk = mCblk; 5229f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // compute number of frames available to write (AudioTrack) or read (AudioRecord), 5239f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // or use previous cached value from framesReady(), with added barrier if it omits. 5249f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int32_t front; 5259f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int32_t rear; 5269f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // See notes on barriers at ClientProxy::obtainBuffer() 5279f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsOut) { 5289f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int32_t flush = cblk->u.mStreaming.mFlush; 5299f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten rear = android_atomic_acquire_load(&cblk->u.mStreaming.mRear); 530b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald front = cblk->u.mStreaming.mFront; 5319f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (flush != mFlush) { 5329f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mFlush = flush; 533050501d11d944dcb256d37d3b86bd658d94f6a7fGlenn Kasten // effectively obtain then release whatever is in the buffer 534050501d11d944dcb256d37d3b86bd658d94f6a7fGlenn Kasten android_atomic_release_store(rear, &cblk->u.mStreaming.mFront); 535b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (front != rear) { 536b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald int32_t old = android_atomic_or(CBLK_FUTEX_WAKE, &cblk->mFutex); 537b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (!(old & CBLK_FUTEX_WAKE)) { 538ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes (void) syscall(__NR_futex, &cblk->mFutex, 539ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes mClientInServer ? FUTEX_WAKE_PRIVATE : FUTEX_WAKE, 1); 540b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 541b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 542b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald front = rear; 543a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 5449f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 5459f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten front = android_atomic_acquire_load(&cblk->u.mStreaming.mFront); 5469f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten rear = cblk->u.mStreaming.mRear; 5479f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 5489f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ssize_t filled = rear - front; 5499f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // pipe should not already be overfull 5509f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (!(0 <= filled && (size_t) filled <= mFrameCount)) { 5519f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ALOGE("Shared memory control block is corrupt (filled=%d); shutting down", filled); 5529f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mIsShutdown = true; 5539f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 5549f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsShutdown) { 5557db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten goto no_init; 556a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 5579f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // don't allow filling pipe beyond the nominal size 5589f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t availToServer; 5599f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsOut) { 5609f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten availToServer = filled; 5619f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mAvailToClient = mFrameCount - filled; 5629f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 5639f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten availToServer = mFrameCount - filled; 5649f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mAvailToClient = filled; 5659f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 5669f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // 'availToServer' may be non-contiguous, so return only the first contiguous chunk 5679f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t part1; 5689f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsOut) { 5699f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten front &= mFrameCountP2 - 1; 5709f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten part1 = mFrameCountP2 - front; 5719f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 5729f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten rear &= mFrameCountP2 - 1; 5739f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten part1 = mFrameCountP2 - rear; 5749f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 5759f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (part1 > availToServer) { 5769f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten part1 = availToServer; 5779f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 5789f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t ask = buffer->mFrameCount; 5799f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (part1 > ask) { 5809f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten part1 = ask; 5819f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 5829f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // is assignment redundant in some cases? 5839f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mFrameCount = part1; 5849f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mRaw = part1 > 0 ? 5859f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten &((char *) mBuffers)[(mIsOut ? front : rear) * mFrameSize] : NULL; 5869f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mNonContig = availToServer - part1; 5872e422c472c91aa7912befd0fc038d1e11f354bc1Glenn Kasten // After flush(), allow releaseBuffer() on a previously obtained buffer; 5882e422c472c91aa7912befd0fc038d1e11f354bc1Glenn Kasten // see "Acknowledge any pending flush()" in audioflinger/Tracks.cpp. 5892e422c472c91aa7912befd0fc038d1e11f354bc1Glenn Kasten if (!ackFlush) { 5902e422c472c91aa7912befd0fc038d1e11f354bc1Glenn Kasten mUnreleased = part1; 5912e422c472c91aa7912befd0fc038d1e11f354bc1Glenn Kasten } 5929f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return part1 > 0 ? NO_ERROR : WOULD_BLOCK; 5937db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten } 5947db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kastenno_init: 5957db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten buffer->mFrameCount = 0; 5967db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten buffer->mRaw = NULL; 5977db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten buffer->mNonContig = 0; 5987db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten mUnreleased = 0; 5997db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten return NO_INIT; 6009f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 601a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 6029f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenvoid ServerProxy::releaseBuffer(Buffer* buffer) 6039f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 6047db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten LOG_ALWAYS_FATAL_IF(buffer == NULL); 6059f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t stepCount = buffer->mFrameCount; 6067db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten if (stepCount == 0 || mIsShutdown) { 6077db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten // prevent accidental re-use of buffer 6087db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten buffer->mFrameCount = 0; 6099f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mRaw = NULL; 6109f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mNonContig = 0; 6119f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return; 6129f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 6137db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten LOG_ALWAYS_FATAL_IF(!(stepCount <= mUnreleased && mUnreleased <= mFrameCount)); 6149f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mUnreleased -= stepCount; 6159f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_track_cblk_t* cblk = mCblk; 6169f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsOut) { 6179f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int32_t front = cblk->u.mStreaming.mFront; 6189f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten android_atomic_release_store(stepCount + front, &cblk->u.mStreaming.mFront); 6199f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 6209f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int32_t rear = cblk->u.mStreaming.mRear; 6219f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten android_atomic_release_store(stepCount + rear, &cblk->u.mStreaming.mRear); 622a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 623a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 624f20e1d8df84c5fbeeace0052d100982ae39bb7a4Glenn Kasten mCblk->mServer += stepCount; 625a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 6269f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t half = mFrameCount / 2; 6279f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (half == 0) { 6289f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten half = 1; 6299f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 630751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten size_t minimum = (size_t) cblk->mMinimum; 6319f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (minimum == 0) { 6329f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten minimum = mIsOut ? half : 1; 6339f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else if (minimum > half) { 6349f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten minimum = half; 6359f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 63693bb77da5481ab75c2cd6e3aa681839273c6e43dGlenn Kasten // FIXME AudioRecord wakeup needs to be optimized; it currently wakes up client every time 637ce8828a016b082f730152af2204b8ea3610dc1ecGlenn Kasten if (!mIsOut || (mAvailToClient + stepCount >= minimum)) { 6389f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ALOGV("mAvailToClient=%u stepCount=%u minimum=%u", mAvailToClient, stepCount, minimum); 6390d09a9bec07b3bec78bd473ff0bfcf0a261f3f25Glenn Kasten int32_t old = android_atomic_or(CBLK_FUTEX_WAKE, &cblk->mFutex); 6400d09a9bec07b3bec78bd473ff0bfcf0a261f3f25Glenn Kasten if (!(old & CBLK_FUTEX_WAKE)) { 641ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes (void) syscall(__NR_futex, &cblk->mFutex, 642ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes mClientInServer ? FUTEX_WAKE_PRIVATE : FUTEX_WAKE, 1); 6439f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 644a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 6459f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 6469f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mFrameCount = 0; 6479f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mRaw = NULL; 6489f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mNonContig = 0; 649a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten} 650a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 6519f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// --------------------------------------------------------------------------- 6529f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 6539f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastensize_t AudioTrackServerProxy::framesReady() 654a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten{ 6559f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten LOG_ALWAYS_FATAL_IF(!mIsOut); 6569f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 6579f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsShutdown) { 6589f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return 0; 6599f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 6609f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_track_cblk_t* cblk = mCblk; 661b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald 662b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald int32_t flush = cblk->u.mStreaming.mFlush; 663b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald if (flush != mFlush) { 664b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald return mFrameCount; 665b1a270d1e926fb9a01b4265a7675ed0c2c8f4868Richard Fitzgerald } 6669f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // the acquire might not be necessary since not doing a subsequent read 6679f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int32_t rear = android_atomic_acquire_load(&cblk->u.mStreaming.mRear); 6689f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ssize_t filled = rear - cblk->u.mStreaming.mFront; 6699f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // pipe should not already be overfull 6709f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (!(0 <= filled && (size_t) filled <= mFrameCount)) { 6719f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ALOGE("Shared memory control block is corrupt (filled=%d); shutting down", filled); 6729f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mIsShutdown = true; 6739f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return 0; 6749f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 6759f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // cache this value for later use by obtainBuffer(), with added barrier 6769f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // and racy if called by normal mixer thread 6779f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // ignores flush(), so framesReady() may report a larger mFrameCount than obtainBuffer() 6789f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return filled; 679a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten} 680a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 681bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurentbool AudioTrackServerProxy::setStreamEndDone() { 682bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurent bool old = 68396f60d8f04432a1ed503b3e24d5736d28c63c9a2Glenn Kasten (android_atomic_or(CBLK_STREAM_END_DONE, &mCblk->mFlags) & CBLK_STREAM_END_DONE) != 0; 684bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurent if (!old) { 685ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes (void) syscall(__NR_futex, &mCblk->mFutex, mClientInServer ? FUTEX_WAKE_PRIVATE : FUTEX_WAKE, 686ee499291404a192b059f2e04c5afc65aa6cdd74cElliott Hughes 1); 687bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurent } 688bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurent return old; 689bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurent} 690bfb1b832079bbb9426f72f3863199a54aefd02daEric Laurent 69182aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kastenvoid AudioTrackServerProxy::tallyUnderrunFrames(uint32_t frameCount) 69282aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten{ 69382aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten mCblk->u.mStreaming.mUnderrunFrames += frameCount; 69482aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten 69582aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten // FIXME also wake futex so that underrun is noticed more quickly 69682aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten (void) android_atomic_or(CBLK_UNDERRUN, &mCblk->mFlags); 69782aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten} 69882aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten 6999f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// --------------------------------------------------------------------------- 7009f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 7019f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn KastenStaticAudioTrackServerProxy::StaticAudioTrackServerProxy(audio_track_cblk_t* cblk, void *buffers, 7029f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t frameCount, size_t frameSize) 7039f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten : AudioTrackServerProxy(cblk, buffers, frameCount, frameSize), 7049f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mObserver(&cblk->u.mStatic.mSingleStateQueue), mPosition(0), 7059f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mEnd(frameCount), mFramesReadyIsCalledByMultipleThreads(false) 706a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten{ 7079f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mState.mLoopStart = 0; 7089f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mState.mLoopEnd = 0; 7099f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mState.mLoopCount = 0; 710a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten} 711a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 7129f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenvoid StaticAudioTrackServerProxy::framesReadyIsCalledByMultipleThreads() 713a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten{ 7149f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mFramesReadyIsCalledByMultipleThreads = true; 7159f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 716a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 7179f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastensize_t StaticAudioTrackServerProxy::framesReady() 7189f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 7199f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // FIXME 7209f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // This is racy if called by normal mixer thread, 7219f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // as we're reading 2 independent variables without a lock. 7229f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // Can't call mObserver.poll(), as we might be called from wrong thread. 7239f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // If looping is enabled, should return a higher number (since includes non-contiguous). 7249f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t position = mPosition; 7259f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (!mFramesReadyIsCalledByMultipleThreads) { 7269f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ssize_t positionOrStatus = pollPosition(); 7279f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (positionOrStatus >= 0) { 7289f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten position = (size_t) positionOrStatus; 7299f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 730a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 7319f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t end = mEnd; 7329f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return position < end ? end - position : 0; 733a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten} 734a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 7359f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenssize_t StaticAudioTrackServerProxy::pollPosition() 736a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten{ 7379f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t position = mPosition; 7389f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten StaticAudioTrackState state; 7399f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mObserver.poll(state)) { 7409f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten bool valid = false; 7419f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t loopStart = state.mLoopStart; 7429f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t loopEnd = state.mLoopEnd; 7439f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (state.mLoopCount == 0) { 7449f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (loopStart > mFrameCount) { 7459f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten loopStart = mFrameCount; 746a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 7479f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // ignore loopEnd 7489f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mPosition = position = loopStart; 7499f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mEnd = mFrameCount; 7509f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mState.mLoopCount = 0; 7519f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten valid = true; 7529f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 7539f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (loopStart < loopEnd && loopEnd <= mFrameCount && 7549f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten loopEnd - loopStart >= MIN_LOOP) { 7559f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (!(loopStart <= position && position < loopEnd)) { 7569f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mPosition = position = loopStart; 7579f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 7589f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mEnd = loopEnd; 7599f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mState = state; 7609f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten valid = true; 761a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 762a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 7639f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (!valid) { 7649f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ALOGE("%s client pushed an invalid state, shutting down", __func__); 7659f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mIsShutdown = true; 7669f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return (ssize_t) NO_INIT; 7679f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 768751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten // This may overflow, but client is not supposed to rely on it 769751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten mCblk->u.mStatic.mBufferPosition = (uint32_t) position; 770a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 7719f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return (ssize_t) position; 772a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten} 773a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 7742e422c472c91aa7912befd0fc038d1e11f354bc1Glenn Kastenstatus_t StaticAudioTrackServerProxy::obtainBuffer(Buffer* buffer, bool ackFlush) 775a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten{ 7769f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mIsShutdown) { 7779f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mFrameCount = 0; 7789f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mRaw = NULL; 7799f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mNonContig = 0; 7809f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mUnreleased = 0; 7819f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return NO_INIT; 7829f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 7839f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ssize_t positionOrStatus = pollPosition(); 7849f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (positionOrStatus < 0) { 7859f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mFrameCount = 0; 7869f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mRaw = NULL; 7879f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mNonContig = 0; 7889f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mUnreleased = 0; 7899f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return (status_t) positionOrStatus; 7909f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 7919f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t position = (size_t) positionOrStatus; 7929f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t avail; 7939f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (position < mEnd) { 7949f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten avail = mEnd - position; 7959f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t wanted = buffer->mFrameCount; 7969f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (avail < wanted) { 7979f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mFrameCount = avail; 7989f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 7999f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten avail = wanted; 8009f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 8019f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mRaw = &((char *) mBuffers)[position * mFrameSize]; 8029f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 8039f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten avail = 0; 8049f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mFrameCount = 0; 8059f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mRaw = NULL; 8069f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 8079f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mNonContig = 0; // FIXME should be > 0 for looping 8089f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mUnreleased = avail; 8099f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return NO_ERROR; 8109f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten} 811a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 8129f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kastenvoid StaticAudioTrackServerProxy::releaseBuffer(Buffer* buffer) 8139f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten{ 8149f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t stepCount = buffer->mFrameCount; 8157db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten LOG_ALWAYS_FATAL_IF(!(stepCount <= mUnreleased)); 8169f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (stepCount == 0) { 8177db7df0e8d9d7cee8ba374468cdbfa0108e3337cGlenn Kasten // prevent accidental re-use of buffer 8189f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mRaw = NULL; 8199f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mNonContig = 0; 8209f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten return; 821a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 8229f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mUnreleased -= stepCount; 8239f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten audio_track_cblk_t* cblk = mCblk; 8249f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t position = mPosition; 8259f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten size_t newPosition = position + stepCount; 8269f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten int32_t setFlags = 0; 8279f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (!(position <= newPosition && newPosition <= mFrameCount)) { 8289f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten ALOGW("%s newPosition %u outside [%u, %u]", __func__, newPosition, position, mFrameCount); 8299f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten newPosition = mFrameCount; 8309f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else if (mState.mLoopCount != 0 && newPosition == mState.mLoopEnd) { 8319f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (mState.mLoopCount == -1 || --mState.mLoopCount != 0) { 8329f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten newPosition = mState.mLoopStart; 8339f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten setFlags = CBLK_LOOP_CYCLE; 8349f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } else { 8359f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mEnd = mFrameCount; // this is what allows playback to continue after the loop 8369f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten setFlags = CBLK_LOOP_FINAL; 8379f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 838a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten } 8399f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (newPosition == mFrameCount) { 8409f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten setFlags |= CBLK_BUFFER_END; 8419f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 8429f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten mPosition = newPosition; 8439f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 844f20e1d8df84c5fbeeace0052d100982ae39bb7a4Glenn Kasten cblk->mServer += stepCount; 845751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten // This may overflow, but client is not supposed to rely on it 846751a9c8cbc391a91604dd1052fb95d3e4d278c2fGlenn Kasten cblk->u.mStatic.mBufferPosition = (uint32_t) newPosition; 8479f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten if (setFlags != 0) { 84896f60d8f04432a1ed503b3e24d5736d28c63c9a2Glenn Kasten (void) android_atomic_or(setFlags, &cblk->mFlags); 8499f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten // this would be a good place to wake a futex 8509f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten } 8519f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 8529f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mFrameCount = 0; 8539f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mRaw = NULL; 8549f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten buffer->mNonContig = 0; 855a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten} 856a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten 85782aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kastenvoid StaticAudioTrackServerProxy::tallyUnderrunFrames(uint32_t frameCount) 85882aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten{ 85982aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten // Unlike AudioTrackServerProxy::tallyUnderrunFrames() used for streaming tracks, 86082aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten // we don't have a location to count underrun frames. The underrun frame counter 86182aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten // only exists in AudioTrackSharedStreaming. Fortunately, underruns are not 86282aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten // possible for static buffer tracks other than at end of buffer, so this is not a loss. 86382aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten 86482aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten // FIXME also wake futex so that underrun is noticed more quickly 86582aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten (void) android_atomic_or(CBLK_UNDERRUN, &mCblk->mFlags); 86682aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten} 86782aaf94a5b18939e4d790bbc752031f3070704a3Glenn Kasten 8689f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten// --------------------------------------------------------------------------- 8699f80dd223d83d9bb9077fb6baee056cee4eaf7e5Glenn Kasten 870a8190fc518b6769257896605f3aee091aeb60b50Glenn Kasten} // namespace android 871