From b635b0e66b257ab442e230bca96afd5105cf6829 Mon Sep 17 00:00:00 2001 From: Lajos Molnar Date: Thu, 13 Feb 2014 15:29:49 -0800 Subject: mediaplayer: keep more buffers with the BufferQueue Change OMX buffer allocation policy to allocate nBufferCountMin + what is required for the BQ. For the BQ, try to allocate 2 additional buffers than the minimum undequeued count. Also account for the fact that BQ may return one less than the actual minimum undequeued count. In most cases the resulting number of buffers ends up being the same as with the previous policy, but we keep more buffers with the BQ. Change-Id: I826db8bf7dd333b620299dba60bf1b81b228275d Bug: 13170236 --- media/libstagefright/ACodec.cpp | 47 ++++++++++++++++++++++----------------- media/libstagefright/OMXCodec.cpp | 38 +++++++++++++++++++++++-------- 2 files changed, 55 insertions(+), 30 deletions(-) (limited to 'media/libstagefright') diff --git a/media/libstagefright/ACodec.cpp b/media/libstagefright/ACodec.cpp index 9276818..14d99cf 100644 --- a/media/libstagefright/ACodec.cpp +++ b/media/libstagefright/ACodec.cpp @@ -638,18 +638,33 @@ status_t ACodec::configureOutputBuffersFromNativeWindow( return err; } - // XXX: Is this the right logic to use? It's not clear to me what the OMX - // buffer counts refer to - how do they account for the renderer holding on - // to buffers? - if (def.nBufferCountActual < def.nBufferCountMin + *minUndequeuedBuffers) { - OMX_U32 newBufferCount = def.nBufferCountMin + *minUndequeuedBuffers; + // FIXME: assume that surface is controlled by app (native window + // returns the number for the case when surface is not controlled by app) + (*minUndequeuedBuffers)++; + + + // Use conservative allocation while also trying to reduce starvation + // + // 1. allocate at least nBufferCountMin + minUndequeuedBuffers - that is the + // minimum needed for the consumer to be able to work + // 2. try to allocate two (2) additional buffers to reduce starvation from + // the consumer + for (OMX_U32 extraBuffers = 2; /* condition inside loop */; extraBuffers--) { + OMX_U32 newBufferCount = + def.nBufferCountMin + *minUndequeuedBuffers + extraBuffers; def.nBufferCountActual = newBufferCount; err = mOMX->setParameter( mNode, OMX_IndexParamPortDefinition, &def, sizeof(def)); - if (err != OK) { - ALOGE("[%s] setting nBufferCountActual to %lu failed: %d", - mComponentName.c_str(), newBufferCount, err); + if (err == OK) { + *minUndequeuedBuffers += extraBuffers; + break; + } + + ALOGW("[%s] setting nBufferCountActual to %lu failed: %d", + mComponentName.c_str(), newBufferCount, err); + /* exit condition */ + if (extraBuffers == 0) { return err; } } @@ -674,6 +689,7 @@ status_t ACodec::allocateOutputBuffersFromNativeWindow() { &bufferCount, &bufferSize, &minUndequeuedBuffers); if (err != 0) return err; + mNumUndequeuedBuffers = minUndequeuedBuffers; ALOGV("[%s] Allocating %lu buffers from a native window of size %lu on " "output port", @@ -739,6 +755,7 @@ status_t ACodec::allocateOutputMetaDataBuffers() { &bufferCount, &bufferSize, &minUndequeuedBuffers); if (err != 0) return err; + mNumUndequeuedBuffers = minUndequeuedBuffers; ALOGV("[%s] Allocating %lu meta buffers on output port", mComponentName.c_str(), bufferCount); @@ -2429,19 +2446,7 @@ void ACodec::waitUntilAllPossibleNativeWindowBuffersAreReturnedToUs() { return; } - int minUndequeuedBufs = 0; - status_t err = mNativeWindow->query( - mNativeWindow.get(), NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, - &minUndequeuedBufs); - - if (err != OK) { - ALOGE("[%s] NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS query failed: %s (%d)", - mComponentName.c_str(), strerror(-err), -err); - - minUndequeuedBufs = 0; - } - - while (countBuffersOwnedByNativeWindow() > (size_t)minUndequeuedBufs + while (countBuffersOwnedByNativeWindow() > mNumUndequeuedBuffers && dequeueBufferFromNativeWindow() != NULL) { // these buffers will be submitted as regular buffers; account for this if (mStoreMetaDataInOutputBuffers && mMetaDataBuffersToSubmit > 0) { diff --git a/media/libstagefright/OMXCodec.cpp b/media/libstagefright/OMXCodec.cpp index 43736ad..79a9665 100644 --- a/media/libstagefright/OMXCodec.cpp +++ b/media/libstagefright/OMXCodec.cpp @@ -92,6 +92,7 @@ static sp InstantiateSoftwareEncoder( #define CODEC_LOGI(x, ...) ALOGI("[%s] "x, mComponentName, ##__VA_ARGS__) #define CODEC_LOGV(x, ...) ALOGV("[%s] "x, mComponentName, ##__VA_ARGS__) +#define CODEC_LOGW(x, ...) ALOGW("[%s] "x, mComponentName, ##__VA_ARGS__) #define CODEC_LOGE(x, ...) ALOGE("[%s] "x, mComponentName, ##__VA_ARGS__) struct OMXCodecObserver : public BnOMXObserver { @@ -1777,21 +1778,40 @@ status_t OMXCodec::allocateOutputBuffersFromNativeWindow() { strerror(-err), -err); return err; } - - // XXX: Is this the right logic to use? It's not clear to me what the OMX - // buffer counts refer to - how do they account for the renderer holding on - // to buffers? - if (def.nBufferCountActual < def.nBufferCountMin + minUndequeuedBufs) { - OMX_U32 newBufferCount = def.nBufferCountMin + minUndequeuedBufs; + // FIXME: assume that surface is controlled by app (native window + // returns the number for the case when surface is not controlled by app) + minUndequeuedBufs++; + + // Use conservative allocation while also trying to reduce starvation + // + // 1. allocate at least nBufferCountMin + minUndequeuedBuffers - that is the + // minimum needed for the consumer to be able to work + // 2. try to allocate two (2) additional buffers to reduce starvation from + // the consumer + CODEC_LOGI("OMX-buffers: min=%u actual=%u undeq=%d", + def.nBufferCountMin, def.nBufferCountActual, minUndequeuedBufs); + + for (OMX_U32 extraBuffers = 2; /* condition inside loop */; extraBuffers--) { + OMX_U32 newBufferCount = + def.nBufferCountMin + minUndequeuedBufs + extraBuffers; def.nBufferCountActual = newBufferCount; err = mOMX->setParameter( mNode, OMX_IndexParamPortDefinition, &def, sizeof(def)); - if (err != OK) { - CODEC_LOGE("setting nBufferCountActual to %lu failed: %d", - newBufferCount, err); + + if (err == OK) { + minUndequeuedBufs += extraBuffers; + break; + } + + CODEC_LOGW("setting nBufferCountActual to %lu failed: %d", + newBufferCount, err); + /* exit condition */ + if (extraBuffers == 0) { return err; } } + CODEC_LOGI("OMX-buffers: min=%u actual=%u undeq=%d", + def.nBufferCountMin, def.nBufferCountActual, minUndequeuedBufs); err = native_window_set_buffer_count( mNativeWindow.get(), def.nBufferCountActual); -- cgit v1.1