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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/video_decode_acceleration_support_mac.h"
#include <dlfcn.h>
#include "base/bind.h"
#include "base/file_path.h"
#import "base/mac/foundation_util.h"
#include "base/location.h"
#include "base/mac/scoped_nsautorelease_pool.h"
#include "base/native_library.h"
using base::mac::CFToNSCast;
using base::mac::NSToCFCast;
const CFStringRef kVDADecoderConfiguration_Width = CFSTR("width");
const CFStringRef kVDADecoderConfiguration_Height = CFSTR("height");
const CFStringRef kVDADecoderConfiguration_SourceFormat = CFSTR("format");
const CFStringRef kVDADecoderConfiguration_avcCData = CFSTR("avcC");
const CFStringRef kCVPixelBufferIOSurfacePropertiesKey =
CFSTR("IOSurfaceProperties");
namespace {
// These are 10.6.3 APIs that we look up at run time.
typedef OSStatus (*VDADecoderCreateFunc)(
CFDictionaryRef decoderConfiguration,
CFDictionaryRef destinationImageBufferAttributes,
VDADecoderOutputCallback* outputCallback,
void* decoderOutputCallbackRefcon,
VDADecoder* decoderOut);
typedef OSStatus (*VDADecoderDecodeFunc)(
VDADecoder decoder,
uint32_t decodeFlags,
CFTypeRef compressedBuffer,
CFDictionaryRef frameInfo);
typedef OSStatus (*VDADecoderFlushFunc)(
VDADecoder decoder,
uint32_t flushFlags);
typedef OSStatus (*VDADecoderDestroyFunc)(
VDADecoder decoder);
VDADecoderCreateFunc g_VDADecoderCreate;
VDADecoderDecodeFunc g_VDADecoderDecode;
VDADecoderFlushFunc g_VDADecoderFlush;
VDADecoderDestroyFunc g_VDADecoderDestroy;
NSString* const kFrameIdKey = @"frame_id";
bool InitializeVdaApis() {
static bool should_initialize = true;
if (should_initialize) {
should_initialize = false;
FilePath path;
if (!base::mac::GetSearchPathDirectory(
NSLibraryDirectory, NSSystemDomainMask, &path)) {
return false;
}
path = path.AppendASCII("Frameworks")
.AppendASCII("VideoDecodeAcceleration.framework")
.AppendASCII("VideoDecodeAcceleration");
base::NativeLibrary vda_library = base::LoadNativeLibrary(path, NULL);
if (!vda_library)
return false;
g_VDADecoderCreate = reinterpret_cast<VDADecoderCreateFunc>(
base::GetFunctionPointerFromNativeLibrary(
vda_library, "VDADecoderCreate"));
g_VDADecoderDecode = reinterpret_cast<VDADecoderDecodeFunc>(
base::GetFunctionPointerFromNativeLibrary(
vda_library, "VDADecoderDecode"));
g_VDADecoderFlush = reinterpret_cast<VDADecoderFlushFunc>(
base::GetFunctionPointerFromNativeLibrary(
vda_library, "VDADecoderFlush"));
g_VDADecoderDestroy = reinterpret_cast<VDADecoderDestroyFunc>(
base::GetFunctionPointerFromNativeLibrary(
vda_library, "VDADecoderDestroy"));
}
return g_VDADecoderCreate && g_VDADecoderDecode && g_VDADecoderFlush &&
g_VDADecoderDestroy;
}
} // namespace
namespace gfx {
VideoDecodeAccelerationSupport::VideoDecodeAccelerationSupport()
: decoder_(NULL),
frame_id_count_(0),
loop_(base::MessageLoopProxy::current()) {
}
VideoDecodeAccelerationSupport::Status VideoDecodeAccelerationSupport::Create(
int width,
int height,
int pixel_format,
const void* avc_bytes,
size_t avc_size) {
if (!InitializeVdaApis())
return LOAD_FRAMEWORK_ERROR;
NSData* avc_data = [NSData dataWithBytes:avc_bytes length:avc_size];
NSDictionary* config = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:width],
CFToNSCast(kVDADecoderConfiguration_Width),
[NSNumber numberWithInt:height],
CFToNSCast(kVDADecoderConfiguration_Height),
[NSNumber numberWithInt:'avc1'],
CFToNSCast(kVDADecoderConfiguration_SourceFormat),
avc_data,
CFToNSCast(kVDADecoderConfiguration_avcCData),
nil];
NSDictionary* format_info = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:pixel_format],
CFToNSCast(kCVPixelBufferPixelFormatTypeKey),
// Must set to an empty dictionary as per documentation.
[NSDictionary dictionary],
CFToNSCast(kCVPixelBufferIOSurfacePropertiesKey),
nil];
OSStatus status = g_VDADecoderCreate(NSToCFCast(config),
NSToCFCast(format_info),
reinterpret_cast<VDADecoderOutputCallback*>(OnFrameReadyCallback), this,
&decoder_);
switch (status) {
case kVDADecoderNoErr:
return SUCCESS;
case kVDADecoderHardwareNotSupportedErr:
return HARDWARE_NOT_SUPPORTED_ERROR;
default:
return OTHER_ERROR;
}
}
VideoDecodeAccelerationSupport::Status VideoDecodeAccelerationSupport::Decode(
const void* bytes,
size_t size,
const FrameReadyCallback& cb) {
DCHECK(decoder_);
++frame_id_count_;
frame_ready_callbacks_[frame_id_count_] = cb;
NSData* data = [NSData dataWithBytes:bytes length:size];
NSDictionary* frame_info = [NSDictionary
dictionaryWithObject:[NSNumber numberWithInt:frame_id_count_]
forKey:kFrameIdKey];
OSStatus status = g_VDADecoderDecode(decoder_, 0, NSToCFCast(data),
NSToCFCast(frame_info));
if (status != kVDADecoderNoErr) {
frame_ready_callbacks_.erase(frame_id_count_);
return OTHER_ERROR;
}
return SUCCESS;
}
VideoDecodeAccelerationSupport::Status VideoDecodeAccelerationSupport::Flush(
bool emit_frames) {
DCHECK(decoder_);
OSStatus status = g_VDADecoderFlush(
decoder_, emit_frames ? kVDADecoderFlush_EmitFrames : 0);
if (!emit_frames)
frame_ready_callbacks_.clear();
return status == kVDADecoderNoErr ? SUCCESS : OTHER_ERROR;
}
VideoDecodeAccelerationSupport::Status
VideoDecodeAccelerationSupport::Destroy() {
// Decoder might be NULL if Create() fails.
if (!decoder_)
return SUCCESS;
OSStatus status = g_VDADecoderDestroy(decoder_);
decoder_ = NULL;
return status == kVDADecoderNoErr ? SUCCESS : OTHER_ERROR;
}
VideoDecodeAccelerationSupport::~VideoDecodeAccelerationSupport() {
DCHECK(!decoder_);
}
// static
void VideoDecodeAccelerationSupport::OnFrameReadyCallback(
void* callback_data,
CFDictionaryRef frame_info,
OSStatus status,
uint32_t flags,
CVImageBufferRef image_buffer) {
base::mac::ScopedNSAutoreleasePool pool;
NSNumber* frame_id_num = base::mac::ObjCCastStrict<NSNumber>(
[CFToNSCast(frame_info) objectForKey:kFrameIdKey]);
int frame_id = [frame_id_num intValue];
// Retain the image while the callback is in flight.
if (image_buffer)
CFRetain(image_buffer);
VideoDecodeAccelerationSupport* vda =
reinterpret_cast<VideoDecodeAccelerationSupport*>(callback_data);
DCHECK(vda);
vda->loop_->PostTask(
FROM_HERE, base::Bind(&VideoDecodeAccelerationSupport::OnFrameReady, vda,
image_buffer, status, frame_id));
}
void VideoDecodeAccelerationSupport::OnFrameReady(CVImageBufferRef image_buffer,
OSStatus status,
int frame_id) {
frame_ready_callbacks_[frame_id].Run(image_buffer, status);
// Match the retain in OnFrameReadyCallback.
if (image_buffer)
CFRelease(image_buffer);
frame_ready_callbacks_.erase(frame_id);
}
} // namespace
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