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Bug 959440 - Various cleanups in MP4Reader. r=kinetik

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Change PlatformDecoderModule::Create*Decoder() to take an
mp4_demuxer::{Audio,Video}DecoderConfig parameter, instead of enumerating all
parameters. This means the platform decoders can have more data if need be,
like the AACAudioConfig.

Change MediaDataDecoder::Input() to take an nsAutoPtr<MP4Sample>&. The sample
will be deleted by the caller (MP4Reader) if Input() returns DECODE_STATUS_OK,
but if the MediaDataDecoder wants to assume responsibility of the
lifecycle of the sample (say to enqueue it), it can forget() on the
nsAutoPtr& passed in and assume responsibility.

Call PlatformDecoderModule::Create() on the decode thread. This is a step
towards making these classes decode-thread only.

Add PlatformDecoderModule::Init(), which caches the pref's we need, since
PlatformDecoderModule::Create() is no longer called on the main thread, we can
no longer access them in there.

Add Init() method to MediaDataDecoder interface. This is so that we can call
MediaDataDecoder::Shutdown() to unblock the initialization of a decoder, if
that init needs to block.

Pass LayersBackend type to WMFVideoDecoder, so it knows whether to init DXVA.
This commit is contained in:
Chris Pearce 2014-01-15 16:13:54 +13:00
parent 731f2e75f4
commit f6c08a2043
5 changed files with 107 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
content/media/fmp4/BlankDecoderModule.cpp
View File

@ -11,6 +11,8 @@
#include "mozilla/CheckedInt.h"
#include "VideoUtils.h"
#include "ImageContainer.h"
#include "mp4_demuxer/mp4_demuxer.h"
#include "mp4_demuxer/audio_decoder_config.h"
namespace mozilla {
@ -22,33 +24,36 @@ public:
BlankMediaDataDecoder(BlankMediaDataCreator* aCreator)
: mCreator(aCreator),
mNextDTS(-1),
mNextTimeStamp(-1),
mNextOffset(-1)
{
}
virtual nsresult Init() MOZ_OVERRIDE {
return NS_OK;
}
virtual nsresult Shutdown() MOZ_OVERRIDE {
return NS_OK;
}
virtual DecoderStatus Input(const uint8_t* aData,
uint32_t aLength,
Microseconds aDTS,
Microseconds aPTS,
int64_t aOffsetInStream) MOZ_OVERRIDE
virtual DecoderStatus Input(nsAutoPtr<mp4_demuxer::MP4Sample>& aSample) MOZ_OVERRIDE
{
// Accepts input, and outputs on the second input, using the difference
// in DTS as the duration.
if (mOutput) {
return DECODE_STATUS_NOT_ACCEPTING;
}
if (mNextDTS != -1 && mNextOffset != -1) {
Microseconds duration = aDTS - mNextDTS;
mOutput = mCreator->Create(mNextDTS, duration, mNextOffset);
Microseconds timestamp = aSample->composition_timestamp;
if (mNextTimeStamp != -1 && mNextOffset != -1) {
Microseconds duration = timestamp - mNextTimeStamp;
mOutput = mCreator->Create(mNextTimeStamp, duration, mNextOffset);
}
mNextDTS = aDTS;
mNextOffset = aOffsetInStream;
mNextTimeStamp = timestamp;
mNextOffset = aSample->byte_offset;
return DECODE_STATUS_OK;
}
@ -66,7 +71,7 @@ public:
}
private:
nsAutoPtr<BlankMediaDataCreator> mCreator;
Microseconds mNextDTS;
Microseconds mNextTimeStamp;
int64_t mNextOffset;
nsAutoPtr<MediaData> mOutput;
bool mHasInput;
@ -198,21 +203,19 @@ public:
}
// Decode thread.
virtual MediaDataDecoder* CreateH264Decoder(layers::LayersBackend aLayersBackend,
virtual MediaDataDecoder* CreateH264Decoder(const mp4_demuxer::VideoDecoderConfig& aConfig,
layers::LayersBackend aLayersBackend,
layers::ImageContainer* aImageContainer) MOZ_OVERRIDE {
BlankVideoDataCreator* decoder = new BlankVideoDataCreator(aImageContainer);
return new BlankMediaDataDecoder<BlankVideoDataCreator>(decoder);
}
// Decode thread.
virtual MediaDataDecoder* CreateAACDecoder(uint32_t aChannelCount,
uint32_t aSampleRate,
uint16_t aBitsPerSample,
const uint8_t* aUserData,
uint32_t aUserDataLength) MOZ_OVERRIDE {
BlankAudioDataCreator* decoder = new BlankAudioDataCreator(aChannelCount,
aSampleRate,
aBitsPerSample);
virtual MediaDataDecoder* CreateAACDecoder(const mp4_demuxer::AudioDecoderConfig& aConfig) MOZ_OVERRIDE {
BlankAudioDataCreator* decoder =
new BlankAudioDataCreator(ChannelLayoutToChannelCount(aConfig.channel_layout()),
aConfig.samples_per_second(),
aConfig.bits_per_channel());
return new BlankMediaDataDecoder<BlankAudioDataCreator>(decoder);
}
};

46
content/media/fmp4/MP4Reader.cpp
View File

@ -123,12 +123,10 @@ nsresult
MP4Reader::Init(MediaDecoderReader* aCloneDonor)
{
MOZ_ASSERT(NS_IsMainThread(), "Must be on main thread.");
PlatformDecoderModule::Init();
mMP4Stream = new MP4Stream(mDecoder->GetResource());
mDemuxer = new MP4Demuxer(mMP4Stream);
mPlatform = PlatformDecoderModule::Create();
NS_ENSURE_TRUE(mPlatform, NS_ERROR_FAILURE);
InitLayersBackendType();
return NS_OK;
@ -157,25 +155,28 @@ MP4Reader::ReadMetadata(MediaInfo* aInfo,
return NS_ERROR_FAILURE;
}
mPlatform = PlatformDecoderModule::Create();
NS_ENSURE_TRUE(mPlatform, NS_ERROR_FAILURE);
if (mHasAudio) {
mInfo.mAudio.mRate = audio.samples_per_second();
mInfo.mAudio.mChannels = ChannelLayoutToChannelCount(audio.channel_layout());
mAudioDecoder = mPlatform->CreateAACDecoder(mInfo.mAudio.mChannels,
mInfo.mAudio.mRate,
audio.bits_per_channel(),
audio.extra_data(),
audio.extra_data_size());
mAudioDecoder = mPlatform->CreateAACDecoder(audio);
NS_ENSURE_TRUE(mAudioDecoder != nullptr, NS_ERROR_FAILURE);
nsresult rv = mAudioDecoder->Init();
NS_ENSURE_SUCCESS(rv, rv);
}
mInfo.mVideo.mHasVideo = mHasVideo = mDemuxer->HasVideo();
if (mHasVideo) {
const VideoDecoderConfig& config = mDemuxer->VideoConfig();
IntSize sz = config.natural_size();
IntSize sz = video.natural_size();
mInfo.mVideo.mDisplay = nsIntSize(sz.width(), sz.height());
mVideoDecoder = mPlatform->CreateH264Decoder(mLayersBackendType,
mVideoDecoder = mPlatform->CreateH264Decoder(video,
mLayersBackendType,
mDecoder->GetImageContainer());
NS_ENSURE_TRUE(mVideoDecoder != nullptr, NS_ERROR_FAILURE);
nsresult rv = mVideoDecoder->Init();
NS_ENSURE_SUCCESS(rv, rv);
}
// Get the duration, and report it to the decoder if we have it.
@ -282,16 +283,15 @@ MP4Reader::Decode(TrackType aTrack, nsAutoPtr<MediaData>& aOutData)
// frames coming.
return false;
}
const std::vector<uint8_t>* data = compressed->data;
status = decoder->Input(&data->front(),
data->size(),
compressed->decode_timestamp,
compressed->composition_timestamp,
compressed->byte_offset);
status = decoder->Input(compressed);
} while (status == DECODE_STATUS_OK);
if (status == DECODE_STATUS_NOT_ACCEPTING) {
// Decoder should now be able to produce an output.
SampleQueue(aTrack).push_front(compressed.forget());
if (compressed != nullptr) {
// Decoder didn't consume data, attempt to decode the same
// sample next time.
SampleQueue(aTrack).push_front(compressed.forget());
}
continue;
}
LOG("MP4Reader decode failure. track=%d status=%d\n", aTrack, status);
@ -401,8 +401,9 @@ MP4Reader::OnDecodeThreadStart()
{
MOZ_ASSERT(!NS_IsMainThread(), "Must not be on main thread.");
MOZ_ASSERT(mDecoder->OnDecodeThread(), "Should be on decode thread.");
MOZ_ASSERT(mPlatform);
mPlatform->OnDecodeThreadStart();
if (mPlatform) {
mPlatform->OnDecodeThreadStart();
}
}
void
@ -410,8 +411,9 @@ MP4Reader::OnDecodeThreadFinish()
{
MOZ_ASSERT(!NS_IsMainThread(), "Must not be on main thread.");
MOZ_ASSERT(mDecoder->OnDecodeThread(), "Should be on decode thread.");
MOZ_ASSERT(mPlatform);
mPlatform->OnDecodeThreadFinish();
if (mPlatform) {
mPlatform->OnDecodeThreadFinish();
}
}
} // namespace mozilla

2
content/media/fmp4/MP4Reader.h
View File

@ -14,6 +14,7 @@
#include "mp4_demuxer/box_definitions.h"
#include <deque>
#include "mozilla/Monitor.h"
namespace mozilla {
@ -82,7 +83,6 @@ private:
bool mHasAudio;
bool mHasVideo;
};
} // namespace mozilla

19
content/media/fmp4/PlatformDecoderModule.cpp
View File

@ -14,16 +14,31 @@ namespace mozilla {
extern PlatformDecoderModule* CreateBlankDecoderModule();
bool PlatformDecoderModule::sUseBlankDecoder = false;
/* static */
void
PlatformDecoderModule::Init()
{
MOZ_ASSERT(NS_IsMainThread());
static bool alreadyInitialized = false;
if (alreadyInitialized) {
return;
}
alreadyInitialized = true;
sUseBlankDecoder = Preferences::GetBool("media.fragmented-mp4.use-blank-decoder");
}
/* static */
PlatformDecoderModule*
PlatformDecoderModule::Create()
{
if (Preferences::GetBool("media.fragmented-mp4.use-blank-decoder")) {
if (sUseBlankDecoder) {
return CreateBlankDecoderModule();
}
#ifdef XP_WIN
nsAutoPtr<WMFDecoderModule> m(new WMFDecoderModule());
if (NS_SUCCEEDED(m->Init())) {
if (NS_SUCCEEDED(m->Startup())) {
return m.forget();
}
#endif

56
content/media/fmp4/PlatformDecoderModule.h
View File

@ -9,6 +9,13 @@
#include "MediaDecoderReader.h"
#include "mozilla/layers/LayersTypes.h"
#include "nsTArray.h"
namespace mp4_demuxer {
class VideoDecoderConfig;
class AudioDecoderConfig;
struct MP4Sample;
}
namespace mozilla {
@ -35,6 +42,9 @@ typedef int64_t Microseconds;
// "media.fragmented-mp4.use-blank-decoder" is true.
class PlatformDecoderModule {
public:
// Call on the main thread to initialize the static state
// needed by Create().
static void Init();
// Factory method that creates the appropriate PlatformDecoderModule for
// the platform we're running on. Caller is responsible for deleting this
@ -56,7 +66,8 @@ public:
// decoding can be used. Returns nullptr if the decoder can't be
// initialized.
// Called on decode thread.
virtual MediaDataDecoder* CreateH264Decoder(layers::LayersBackend aLayersBackend,
virtual MediaDataDecoder* CreateH264Decoder(const mp4_demuxer::VideoDecoderConfig& aConfig,
layers::LayersBackend aLayersBackend,
layers::ImageContainer* aImageContainer) = 0;
// Creates and initializes an AAC decoder with the specified properties.
@ -65,11 +76,7 @@ public:
// so it must be copied if it is to be retained by the decoder.
// Returns nullptr if the decoder can't be initialized.
// Called on decode thread.
virtual MediaDataDecoder* CreateAACDecoder(uint32_t aChannelCount,
uint32_t aSampleRate,
uint16_t aBitsPerSample,
const uint8_t* aAACConfig,
uint32_t aAACConfigLength) = 0;
virtual MediaDataDecoder* CreateAACDecoder(const mp4_demuxer::AudioDecoderConfig& aConfig) = 0;
// Called when a decode thread is started. Called on decode thread.
virtual void OnDecodeThreadStart() {}
@ -80,6 +87,8 @@ public:
virtual ~PlatformDecoderModule() {}
protected:
PlatformDecoderModule() {}
// Caches pref media.fragmented-mp4.use-blank-decoder
static bool sUseBlankDecoder;
};
// Return value of the MediaDataDecoder functions.
@ -102,10 +111,29 @@ class MediaDataDecoder {
public:
virtual ~MediaDataDecoder() {};
// Initialize the decoder. The decoder should be ready to decode after
// this returns. The decoder should do any initialization here, rather
// than in its constructor, so that if the MP4Reader needs to Shutdown()
// during initialization it can call Shutdown() to cancel this.
// Any initialization that requires blocking the calling thread *must*
// be done here so that it can be canceled by calling Shutdown()!
virtual nsresult Init() = 0;
// Inserts aData into the decoding pipeline. Decoding may begin
// asynchronously. The caller owns aData, so it may need to be copied.
// The MP4Reader calls Input() with new input in a loop until Input()
// stops returning DECODE_STATUS_OK.
// asynchronously.
//
// If the decoder needs to assume ownership of the sample it may do so by
// calling forget() on aSample.
//
// If Input() returns DECODE_STATUS_NOT_ACCEPTING without forget()ing
// aSample, then the next call will have the same aSample. Otherwise
// the caller will delete aSample after Input() returns.
//
// The MP4Reader calls Input() in a loop until Input() stops returning
// DECODE_STATUS_OK. Input() should return DECODE_STATUS_NOT_ACCEPTING
// once the underlying decoder should have enough data to output decoded
// data.
//
// Called on the media decode thread.
// Returns:
// - DECODE_STATUS_OK if input was successfully inserted into
@ -114,15 +142,13 @@ public:
// at this time. The MP4Reader will assume that the decoder can now
// produce one or more output samples, and call the Output() function.
// The MP4Reader will call Input() again with the same data later,
// after the decoder's Output() function has stopped producing output.
// after the decoder's Output() function has stopped producing output,
// except if Input() called forget() on aSample, whereupon a new sample
// will come in next call.
// - DECODE_STATUS_ERROR if the decoder has been shutdown, or some
// unspecified error.
// This function should not return DECODE_STATUS_NEED_MORE_INPUT.
virtual DecoderStatus Input(const uint8_t* aData,
uint32_t aLength,
Microseconds aDTS,
Microseconds aPTS,
int64_t aOffsetInStream) = 0;
virtual DecoderStatus Input(nsAutoPtr<mp4_demuxer::MP4Sample>& aSample) = 0;
// Blocks until a decoded sample is produced by the deoder. The MP4Reader
// calls this until it stops returning DECODE_STATUS_OK.