Giải pháp cho Giải mã video trên linux / chromium:
Chức năng GpuVideoDecodeAccelerator đã bị vô hiệu hóa trong mã linux của crom trong vài tháng (ngoại trừ ChromiumOS rõ ràng), do đó bạn sẽ phải vá crom như thế này:
https://bazaar.launchpad.net/~saiarcot895/chromium-browser/chromium-browser.utopic.beta/view/head:/debian/patches/enable_vaapi_on_linux.diff
hoặc sử dụng PPA tuyệt vời này:
https://launchpad.net/~saiarcot895/+archive/ubfox/chromium-beta
Đã thử nghiệm với libva trên Intel SandyBridge cho H264, hoạt động rất tốt. Không biết về VP8.
Theo yêu cầu ở đây là Bản vá đầy đủ:
Index: beta.vivid/content/common/gpu/media/gpu_video_decode_accelerator.cc
===================================================================
--- beta.vivid.orig/content/common/gpu/media/gpu_video_decode_accelerator.cc 2014-12-04 09:32:45.344607112 -0500
+++ beta.vivid/content/common/gpu/media/gpu_video_decode_accelerator.cc 2014-12-04 09:32:45.341607169 -0500
@@ -31,7 +31,7 @@
#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL) && defined(USE_X11)
#include "content/common/gpu/media/v4l2_video_decode_accelerator.h"
#include "content/common/gpu/media/v4l2_video_device.h"
-#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY) && defined(USE_X11)
+#elif (defined(OS_CHROMEOS) || defined(OS_LINUX)) && defined(ARCH_CPU_X86_FAMILY) && defined(USE_X11)
#include "content/common/gpu/media/vaapi_video_decode_accelerator.h"
#include "ui/gl/gl_context_glx.h"
#include "ui/gl/gl_implementation.h"
@@ -272,7 +272,7 @@
make_context_current_,
device.Pass(),
io_message_loop_));
-#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY) && defined(USE_X11)
+#elif (defined(OS_CHROMEOS) || defined(OS_LINUX)) && defined(ARCH_CPU_X86_FAMILY) && defined(USE_X11)
if (gfx::GetGLImplementation() != gfx::kGLImplementationDesktopGL) {
VLOG(1) << "HW video decode acceleration not available without "
"DesktopGL (GLX).";
Index: beta.vivid/content/content_common.gypi
===================================================================
--- beta.vivid.orig/content/content_common.gypi 2014-12-04 09:32:45.344607112 -0500
+++ beta.vivid/content/content_common.gypi 2014-12-04 09:32:45.341607169 -0500
@@ -769,7 +769,7 @@
'<(DEPTH)/third_party/khronos',
],
}],
- ['target_arch != "arm" and chromeos == 1 and use_x11 == 1', {
+ ['target_arch != "arm" and (chromeos == 1 or desktop_linux == 1) and use_x11 == 1', {
'dependencies': [
'../media/media.gyp:media',
'../third_party/libyuv/libyuv.gyp:libyuv',
Index: beta.vivid/content/content_gpu.gypi
===================================================================
--- beta.vivid.orig/content/content_gpu.gypi 2014-12-04 09:32:45.344607112 -0500
+++ beta.vivid/content/content_gpu.gypi 2014-12-04 09:32:45.341607169 -0500
@@ -40,7 +40,7 @@
],
},
}],
- ['target_arch!="arm" and chromeos == 1', {
+ ['target_arch!="arm" and (chromeos == 1 or desktop_linux == 1)', {
'include_dirs': [
'<(DEPTH)/third_party/libva',
],
Index: beta.vivid/content/content_tests.gypi
===================================================================
--- beta.vivid.orig/content/content_tests.gypi 2014-12-04 09:32:45.344607112 -0500
+++ beta.vivid/content/content_tests.gypi 2014-12-04 09:32:45.342607150 -0500
@@ -1556,7 +1556,7 @@
},
]
}],
- ['chromeos==1 and use_x11 == 1 and target_arch != "arm"', {
+ ['(chromeos==1 or desktop_linux==1) and use_x11 == 1 and target_arch != "arm"', {
'targets': [
{
'target_name': 'vaapi_h264_decoder_unittest',
Index: beta.vivid/content/public/common/content_switches.cc
===================================================================
--- beta.vivid.orig/content/public/common/content_switches.cc 2014-12-04 09:32:45.344607112 -0500
+++ beta.vivid/content/public/common/content_switches.cc 2014-12-04 09:32:45.342607150 -0500
@@ -930,7 +930,7 @@
// Disable web audio API.
const char kDisableWebAudio[] = "disable-webaudio";
-#if defined(OS_CHROMEOS)
+#if defined(OS_CHROMEOS) || defined(OS_LINUX)
// Disables panel fitting (used for mirror mode).
const char kDisablePanelFitting[] = "disable-panel-fitting";
Index: beta.vivid/content/public/common/content_switches.h
===================================================================
--- beta.vivid.orig/content/public/common/content_switches.h 2014-12-04 09:32:45.344607112 -0500
+++ beta.vivid/content/public/common/content_switches.h 2014-12-04 09:32:45.342607150 -0500
@@ -268,7 +268,7 @@
CONTENT_EXPORT extern const char kDisableWebAudio[];
-#if defined(OS_CHROMEOS)
+#if defined(OS_CHROMEOS) || defined(OS_LINUX)
CONTENT_EXPORT extern const char kDisablePanelFitting[];
CONTENT_EXPORT extern const char kDisableVaapiAcceleratedVideoEncode[];
#endif
Index: beta.vivid/media/media.gyp
===================================================================
--- beta.vivid.orig/media/media.gyp 2014-12-04 09:32:45.344607112 -0500
+++ beta.vivid/media/media.gyp 2014-12-04 09:32:45.342607150 -0500
@@ -672,7 +672,7 @@
],
}],
# For VaapiVideoEncodeAccelerator.
- ['target_arch != "arm" and chromeos == 1 and use_x11 == 1', {
+ ['target_arch != "arm" and (chromeos == 1 or desktop_linux == 1) and use_x11 == 1', {
'sources': [
'filters/h264_bitstream_buffer.cc',
'filters/h264_bitstream_buffer.h',
Index: beta.vivid/gpu/config/software_rendering_list_json.cc
===================================================================
--- beta.vivid.orig/gpu/config/software_rendering_list_json.cc 2014-12-04 09:32:45.344607112 -0500
+++ beta.vivid/gpu/config/software_rendering_list_json.cc 2014-12-04 09:32:45.343607131 -0500
@@ -508,8 +508,8 @@
},
{
"id": 48,
- "description": "Accelerated video decode is unavailable on Mac and Linux",
- "cr_bugs": [137247, 133828],
+ "description": "Accelerated video decode is unavailable on Mac",
+ "cr_bugs": [133828],
"exceptions": [
{
"os": {
@@ -525,6 +525,11 @@
"os": {
"type": "android"
}
+ },
+ {
+ "os": {
+ "type": "linux"
+ }
}
],
"features": [
Index: beta.vivid/content/common/sandbox_linux/bpf_gpu_policy_linux.cc
===================================================================
--- beta.vivid.orig/content/common/sandbox_linux/bpf_gpu_policy_linux.cc 2014-12-04 09:32:45.344607112 -0500
+++ beta.vivid/content/common/sandbox_linux/bpf_gpu_policy_linux.cc 2014-12-04 09:32:45.343607131 -0500
@@ -21,6 +21,8 @@
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "build/build_config.h"
+// Auto-generated for dlopen libva libraries
+#include "content/common/gpu/media/va_stubs.h"
#include "content/common/sandbox_linux/sandbox_bpf_base_policy_linux.h"
#include "content/common/sandbox_linux/sandbox_seccomp_bpf_linux.h"
#include "content/common/set_process_title.h"
@@ -30,6 +32,8 @@
#include "sandbox/linux/seccomp-bpf-helpers/syscall_sets.h"
#include "sandbox/linux/services/linux_syscalls.h"
#include "sandbox/linux/syscall_broker/broker_process.h"
+#include "third_party/libva/va/va.h"
+#include "third_party/libva/va/va_x11.h"
using sandbox::BrokerProcess;
using sandbox::SyscallSets;
@@ -38,6 +42,14 @@
using sandbox::bpf_dsl::ResultExpr;
using sandbox::bpf_dsl::Trap;
+using content_common_gpu_media::kModuleVa;
+using content_common_gpu_media::InitializeStubs;
+using content_common_gpu_media::StubPathMap;
+
+// libva-x11 depends on libva, so dlopen libva-x11 is enough
+static const base::FilePath::CharType kVaLib[] =
+ FILE_PATH_LITERAL("libva-x11.so.1");
+
namespace content {
namespace {
@@ -238,19 +250,38 @@
// Accelerated video dlopen()'s some shared objects
// inside the sandbox, so preload them now.
if (IsAcceleratedVideoEnabled()) {
- const char* I965DrvVideoPath = NULL;
+ StubPathMap paths;
+ paths[kModuleVa].push_back(kVaLib);
+ if (!InitializeStubs(paths)) {
+ return false;
+ }
- if (IsArchitectureX86_64()) {
- I965DrvVideoPath = "/usr/lib64/va/drivers/i965_drv_video.so";
- } else if (IsArchitectureI386()) {
- I965DrvVideoPath = "/usr/lib/va/drivers/i965_drv_video.so";
+ // libva drivers won't get loaded even above two libraries get dlopened.
+ // Thus, libva calls will fail after post sandbox stage.
+ //
+ // To get the va driver loadded before sandboxing, upstream simply dlopen
+ // the hard-coded va driver path because ChromeOS is the only platform
+ // that Google want to support libva.
+ //
+ // While generic linux distros ship va driver as anywhere they want.
+ // Fortunately, the va driver will be loadded when vaInitialize() get
+ // called.
+ // So the following code is to call vaInitialize() before sandboxing.
+ Display* x_display = XOpenDisplay(NULL);
+ VADisplay va_display = vaGetDisplay(x_display);
+ if (!vaDisplayIsValid(va_display)) {
+ DVLOG(1) << "Failed to call vaGetDisplay()";
+ return false;
}
- dlopen(I965DrvVideoPath, RTLD_NOW|RTLD_GLOBAL|RTLD_NODELETE);
- dlopen("libva.so.1", RTLD_NOW|RTLD_GLOBAL|RTLD_NODELETE);
- dlopen("libva-x11.so.1", RTLD_NOW|RTLD_GLOBAL|RTLD_NODELETE);
- }
- }
+ int major_version, minor_version;
+ if (vaInitialize(va_display, &major_version, &minor_version)
+ != VA_STATUS_SUCCESS) {
+ DVLOG(1) << "Failed to call vaInitialize()";
+ return false;
+ }
+ } // end of IsAcceleratedVideoDecodeEnabled()
+ } // end of IsArchitectureX86_64() || IsArchitectureI386()
return true;
}
