blob: 01efaadcf8cfc49d7e1a6312cb8e01d703e91d77 [file] [log] [blame]
// Copyright 2014 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 "media/gpu/vaapi_video_encode_accelerator.h"
#include <string.h>
#include <memory>
#include <utility>
#include "base/bind.h"
#include "base/callback.h"
#include "base/macros.h"
#include "base/metrics/histogram.h"
#include "base/numerics/safe_conversions.h"
#include "media/base/bind_to_current_loop.h"
#include "media/gpu/h264_dpb.h"
#include "media/gpu/shared_memory_region.h"
#include "third_party/libva/va/va_enc_h264.h"
#define DVLOGF(level) DVLOG(level) << __FUNCTION__ << "(): "
#define NOTIFY_ERROR(error, msg) \
do { \
SetState(kError); \
LOG(ERROR) << msg; \
LOG(ERROR) << "Calling NotifyError(" << error << ")"; \
NotifyError(error); \
} while (0)
namespace media {
namespace {
// Need 2 surfaces for each frame: one for input data and one for
// reconstructed picture, which is later used for reference.
const size_t kMinSurfacesToEncode = 2;
// Subjectively chosen.
const size_t kNumInputBuffers = 4;
const size_t kMaxNumReferenceFrames = 4;
// We need up to kMaxNumReferenceFrames surfaces for reference, plus one
// for input and one for encode (which will be added to the set of reference
// frames for subsequent frames). Actual execution of HW encode is done
// in parallel, and we want to process more frames in the meantime.
// To have kNumInputBuffers in flight, we need a full set of reference +
// encode surfaces (i.e. kMaxNumReferenceFrames + kMinSurfacesToEncode), and
// (kNumInputBuffers - 1) of kMinSurfacesToEncode for the remaining frames
// in flight.
const size_t kNumSurfaces = kMaxNumReferenceFrames + kMinSurfacesToEncode +
kMinSurfacesToEncode * (kNumInputBuffers - 1);
// An IDR every 2048 frames, an I frame every 256 and no B frames.
// We choose IDR period to equal MaxFrameNum so it must be a power of 2.
const int kIDRPeriod = 2048;
const int kIPeriod = 256;
const int kIPPeriod = 1;
const int kDefaultFramerate = 30;
// HRD parameters (ch. E.2.2 in spec).
const int kBitRateScale = 0; // bit_rate_scale for SPS HRD parameters.
const int kCPBSizeScale = 0; // cpb_size_scale for SPS HRD parameters.
const int kDefaultQP = 26;
// All Intel codecs can do at least 4.1.
const int kDefaultLevelIDC = 41;
const int kChromaFormatIDC = 1; // 4:2:0
// Arbitrarily chosen bitrate window size for rate control, in ms.
const int kCPBWindowSizeMs = 1500;
// UMA errors that the VaapiVideoEncodeAccelerator class reports.
enum VAVEAEncoderFailure {
VAAPI_ERROR = 0,
VAVEA_ENCODER_FAILURES_MAX,
};
}
// Round |value| up to |alignment|, which must be a power of 2.
static inline size_t RoundUpToPowerOf2(size_t value, size_t alignment) {
// Check that |alignment| is a power of 2.
DCHECK((alignment + (alignment - 1)) == (alignment | (alignment - 1)));
return ((value + (alignment - 1)) & ~(alignment - 1));
}
static void ReportToUMA(VAVEAEncoderFailure failure) {
UMA_HISTOGRAM_ENUMERATION("Media.VAVEA.EncoderFailure", failure,
VAVEA_ENCODER_FAILURES_MAX + 1);
}
struct VaapiVideoEncodeAccelerator::InputFrameRef {
InputFrameRef(const scoped_refptr<media::VideoFrame>& frame,
bool force_keyframe)
: frame(frame), force_keyframe(force_keyframe) {}
const scoped_refptr<media::VideoFrame> frame;
const bool force_keyframe;
};
struct VaapiVideoEncodeAccelerator::BitstreamBufferRef {
BitstreamBufferRef(int32_t id, std::unique_ptr<SharedMemoryRegion> shm)
: id(id), shm(std::move(shm)) {}
const int32_t id;
const std::unique_ptr<SharedMemoryRegion> shm;
};
media::VideoEncodeAccelerator::SupportedProfiles
VaapiVideoEncodeAccelerator::GetSupportedProfiles() {
return VaapiWrapper::GetSupportedEncodeProfiles();
}
static unsigned int Log2OfPowerOf2(unsigned int x) {
CHECK_GT(x, 0u);
DCHECK_EQ(x & (x - 1), 0u);
int log = 0;
while (x > 1) {
x >>= 1;
++log;
}
return log;
}
VaapiVideoEncodeAccelerator::VaapiVideoEncodeAccelerator()
: profile_(media::VIDEO_CODEC_PROFILE_UNKNOWN),
mb_width_(0),
mb_height_(0),
output_buffer_byte_size_(0),
state_(kUninitialized),
frame_num_(0),
idr_pic_id_(0),
bitrate_(0),
framerate_(0),
cpb_size_(0),
encoding_parameters_changed_(false),
encoder_thread_("VAVEAEncoderThread"),
child_task_runner_(base::ThreadTaskRunnerHandle::Get()),
weak_this_ptr_factory_(this) {
DVLOGF(4);
weak_this_ = weak_this_ptr_factory_.GetWeakPtr();
max_ref_idx_l0_size_ = kMaxNumReferenceFrames;
qp_ = kDefaultQP;
idr_period_ = kIDRPeriod;
i_period_ = kIPeriod;
ip_period_ = kIPPeriod;
}
VaapiVideoEncodeAccelerator::~VaapiVideoEncodeAccelerator() {
DVLOGF(4);
DCHECK(child_task_runner_->BelongsToCurrentThread());
DCHECK(!encoder_thread_.IsRunning());
}
bool VaapiVideoEncodeAccelerator::Initialize(
media::VideoPixelFormat format,
const gfx::Size& input_visible_size,
media::VideoCodecProfile output_profile,
uint32_t initial_bitrate,
Client* client) {
DCHECK(child_task_runner_->BelongsToCurrentThread());
DCHECK(!encoder_thread_.IsRunning());
DCHECK_EQ(state_, kUninitialized);
DVLOGF(1) << "Initializing VAVEA, input_format: "
<< media::VideoPixelFormatToString(format)
<< ", input_visible_size: " << input_visible_size.ToString()
<< ", output_profile: " << output_profile
<< ", initial_bitrate: " << initial_bitrate;
client_ptr_factory_.reset(new base::WeakPtrFactory<Client>(client));
client_ = client_ptr_factory_->GetWeakPtr();
const SupportedProfiles& profiles = GetSupportedProfiles();
auto profile = find_if(profiles.begin(), profiles.end(),
[output_profile](const SupportedProfile& profile) {
return profile.profile == output_profile;
});
if (profile == profiles.end()) {
DVLOGF(1) << "Unsupported output profile " << output_profile;
return false;
}
if (input_visible_size.width() > profile->max_resolution.width() ||
input_visible_size.height() > profile->max_resolution.height()) {
DVLOGF(1) << "Input size too big: " << input_visible_size.ToString()
<< ", max supported size: " << profile->max_resolution.ToString();
return false;
}
if (format != media::PIXEL_FORMAT_I420) {
DVLOGF(1) << "Unsupported input format: "
<< media::VideoPixelFormatToString(format);
return false;
}
profile_ = output_profile;
visible_size_ = input_visible_size;
// 4:2:0 format has to be 2-aligned.
DCHECK_EQ(visible_size_.width() % 2, 0);
DCHECK_EQ(visible_size_.height() % 2, 0);
coded_size_ = gfx::Size(RoundUpToPowerOf2(visible_size_.width(), 16),
RoundUpToPowerOf2(visible_size_.height(), 16));
mb_width_ = coded_size_.width() / 16;
mb_height_ = coded_size_.height() / 16;
output_buffer_byte_size_ = coded_size_.GetArea();
UpdateRates(initial_bitrate, kDefaultFramerate);
vaapi_wrapper_ =
VaapiWrapper::CreateForVideoCodec(VaapiWrapper::kEncode, output_profile,
base::Bind(&ReportToUMA, VAAPI_ERROR));
if (!vaapi_wrapper_.get()) {
DVLOGF(1) << "Failed initializing VAAPI for profile " << output_profile;
return false;
}
if (!encoder_thread_.Start()) {
LOG(ERROR) << "Failed to start encoder thread";
return false;
}
encoder_thread_task_runner_ = encoder_thread_.task_runner();
// Finish the remaining initialization on the encoder thread.
encoder_thread_task_runner_->PostTask(
FROM_HERE, base::Bind(&VaapiVideoEncodeAccelerator::InitializeTask,
base::Unretained(this)));
return true;
}
void VaapiVideoEncodeAccelerator::InitializeTask() {
DCHECK(encoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_EQ(state_, kUninitialized);
DVLOGF(4);
va_surface_release_cb_ = media::BindToCurrentLoop(
base::Bind(&VaapiVideoEncodeAccelerator::RecycleVASurfaceID,
base::Unretained(this)));
if (!vaapi_wrapper_->CreateSurfaces(VA_RT_FORMAT_YUV420, coded_size_,
kNumSurfaces,
&available_va_surface_ids_)) {
NOTIFY_ERROR(kPlatformFailureError, "Failed creating VASurfaces");
return;
}
UpdateSPS();
GeneratePackedSPS();
UpdatePPS();
GeneratePackedPPS();
child_task_runner_->PostTask(
FROM_HERE,
base::Bind(&Client::RequireBitstreamBuffers, client_, kNumInputBuffers,
coded_size_, output_buffer_byte_size_));
SetState(kEncoding);
}
void VaapiVideoEncodeAccelerator::RecycleVASurfaceID(
VASurfaceID va_surface_id) {
DVLOGF(4) << "va_surface_id: " << va_surface_id;
DCHECK(encoder_thread_task_runner_->BelongsToCurrentThread());
available_va_surface_ids_.push_back(va_surface_id);
EncodeFrameTask();
}
void VaapiVideoEncodeAccelerator::BeginFrame(bool force_keyframe) {
current_pic_ = new H264Picture();
// If the current picture is an IDR picture, frame_num shall be equal to 0.
if (force_keyframe)
frame_num_ = 0;
current_pic_->frame_num = frame_num_++;
frame_num_ %= idr_period_;
if (current_pic_->frame_num == 0) {
current_pic_->idr = true;
// H264 spec mandates idr_pic_id to differ between two consecutive IDRs.
idr_pic_id_ ^= 1;
ref_pic_list0_.clear();
}
if (current_pic_->frame_num % i_period_ == 0)
current_pic_->type = media::H264SliceHeader::kISlice;
else
current_pic_->type = media::H264SliceHeader::kPSlice;
if (current_pic_->type != media::H264SliceHeader::kBSlice)
current_pic_->ref = true;
current_pic_->pic_order_cnt = current_pic_->frame_num * 2;
current_pic_->top_field_order_cnt = current_pic_->pic_order_cnt;
current_pic_->pic_order_cnt_lsb = current_pic_->pic_order_cnt;
current_encode_job_->keyframe = current_pic_->idr;
DVLOGF(4) << "Starting a new frame, type: " << current_pic_->type
<< (force_keyframe ? " (forced keyframe)" : "")
<< " frame_num: " << current_pic_->frame_num
<< " POC: " << current_pic_->pic_order_cnt;
}
void VaapiVideoEncodeAccelerator::EndFrame() {
DCHECK(current_pic_);
// Store the picture on the list of reference pictures and keep the list
// below maximum size, dropping oldest references.
if (current_pic_->ref)
ref_pic_list0_.push_front(current_encode_job_->recon_surface);
size_t max_num_ref_frames =
base::checked_cast<size_t>(current_sps_.max_num_ref_frames);
while (ref_pic_list0_.size() > max_num_ref_frames)
ref_pic_list0_.pop_back();
submitted_encode_jobs_.push(make_linked_ptr(current_encode_job_.release()));
}
static void InitVAPicture(VAPictureH264* va_pic) {
memset(va_pic, 0, sizeof(*va_pic));
va_pic->picture_id = VA_INVALID_ID;
va_pic->flags = VA_PICTURE_H264_INVALID;
}
bool VaapiVideoEncodeAccelerator::SubmitFrameParameters() {
DCHECK(current_pic_);
VAEncSequenceParameterBufferH264 seq_param;
memset(&seq_param, 0, sizeof(seq_param));
#define SPS_TO_SP(a) seq_param.a = current_sps_.a;
SPS_TO_SP(seq_parameter_set_id);
SPS_TO_SP(level_idc);
seq_param.intra_period = i_period_;
seq_param.intra_idr_period = idr_period_;
seq_param.ip_period = ip_period_;
seq_param.bits_per_second = bitrate_;
SPS_TO_SP(max_num_ref_frames);
seq_param.picture_width_in_mbs = mb_width_;
seq_param.picture_height_in_mbs = mb_height_;
#define SPS_TO_SP_FS(a) seq_param.seq_fields.bits.a = current_sps_.a;
SPS_TO_SP_FS(chroma_format_idc);
SPS_TO_SP_FS(frame_mbs_only_flag);
SPS_TO_SP_FS(log2_max_frame_num_minus4);
SPS_TO_SP_FS(pic_order_cnt_type);
SPS_TO_SP_FS(log2_max_pic_order_cnt_lsb_minus4);
#undef SPS_TO_SP_FS
SPS_TO_SP(bit_depth_luma_minus8);
SPS_TO_SP(bit_depth_chroma_minus8);
SPS_TO_SP(frame_cropping_flag);
if (current_sps_.frame_cropping_flag) {
SPS_TO_SP(frame_crop_left_offset);
SPS_TO_SP(frame_crop_right_offset);
SPS_TO_SP(frame_crop_top_offset);
SPS_TO_SP(frame_crop_bottom_offset);
}
SPS_TO_SP(vui_parameters_present_flag);
#define SPS_TO_SP_VF(a) seq_param.vui_fields.bits.a = current_sps_.a;
SPS_TO_SP_VF(timing_info_present_flag);
#undef SPS_TO_SP_VF
SPS_TO_SP(num_units_in_tick);
SPS_TO_SP(time_scale);
#undef SPS_TO_SP
if (!vaapi_wrapper_->SubmitBuffer(VAEncSequenceParameterBufferType,
sizeof(seq_param), &seq_param))
return false;
VAEncPictureParameterBufferH264 pic_param;
memset(&pic_param, 0, sizeof(pic_param));
pic_param.CurrPic.picture_id = current_encode_job_->recon_surface->id();
pic_param.CurrPic.TopFieldOrderCnt = current_pic_->top_field_order_cnt;
pic_param.CurrPic.BottomFieldOrderCnt = current_pic_->bottom_field_order_cnt;
pic_param.CurrPic.flags = 0;
for (size_t i = 0; i < arraysize(pic_param.ReferenceFrames); ++i)
InitVAPicture(&pic_param.ReferenceFrames[i]);
DCHECK_LE(ref_pic_list0_.size(), arraysize(pic_param.ReferenceFrames));
RefPicList::const_iterator iter = ref_pic_list0_.begin();
for (size_t i = 0;
i < arraysize(pic_param.ReferenceFrames) && iter != ref_pic_list0_.end();
++iter, ++i) {
pic_param.ReferenceFrames[i].picture_id = (*iter)->id();
pic_param.ReferenceFrames[i].flags = 0;
}
pic_param.coded_buf = current_encode_job_->coded_buffer;
pic_param.pic_parameter_set_id = current_pps_.pic_parameter_set_id;
pic_param.seq_parameter_set_id = current_pps_.seq_parameter_set_id;
pic_param.frame_num = current_pic_->frame_num;
pic_param.pic_init_qp = qp_;
pic_param.num_ref_idx_l0_active_minus1 = max_ref_idx_l0_size_ - 1;
pic_param.pic_fields.bits.idr_pic_flag = current_pic_->idr;
pic_param.pic_fields.bits.reference_pic_flag = current_pic_->ref;
#define PPS_TO_PP_PF(a) pic_param.pic_fields.bits.a = current_pps_.a;
PPS_TO_PP_PF(entropy_coding_mode_flag);
PPS_TO_PP_PF(transform_8x8_mode_flag);
PPS_TO_PP_PF(deblocking_filter_control_present_flag);
#undef PPS_TO_PP_PF
if (!vaapi_wrapper_->SubmitBuffer(VAEncPictureParameterBufferType,
sizeof(pic_param), &pic_param))
return false;
VAEncSliceParameterBufferH264 slice_param;
memset(&slice_param, 0, sizeof(slice_param));
slice_param.num_macroblocks = mb_width_ * mb_height_;
slice_param.macroblock_info = VA_INVALID_ID;
slice_param.slice_type = current_pic_->type;
slice_param.pic_parameter_set_id = current_pps_.pic_parameter_set_id;
slice_param.idr_pic_id = idr_pic_id_;
slice_param.pic_order_cnt_lsb = current_pic_->pic_order_cnt_lsb;
slice_param.num_ref_idx_active_override_flag = true;
for (size_t i = 0; i < arraysize(slice_param.RefPicList0); ++i)
InitVAPicture(&slice_param.RefPicList0[i]);
for (size_t i = 0; i < arraysize(slice_param.RefPicList1); ++i)
InitVAPicture(&slice_param.RefPicList1[i]);
DCHECK_LE(ref_pic_list0_.size(), arraysize(slice_param.RefPicList0));
iter = ref_pic_list0_.begin();
for (size_t i = 0;
i < arraysize(slice_param.RefPicList0) && iter != ref_pic_list0_.end();
++iter, ++i) {
InitVAPicture(&slice_param.RefPicList0[i]);
slice_param.RefPicList0[i].picture_id = (*iter)->id();
slice_param.RefPicList0[i].flags = 0;
}
if (!vaapi_wrapper_->SubmitBuffer(VAEncSliceParameterBufferType,
sizeof(slice_param), &slice_param))
return false;
VAEncMiscParameterRateControl rate_control_param;
memset(&rate_control_param, 0, sizeof(rate_control_param));
rate_control_param.bits_per_second = bitrate_;
rate_control_param.target_percentage = 90;
rate_control_param.window_size = kCPBWindowSizeMs;
rate_control_param.initial_qp = qp_;
rate_control_param.rc_flags.bits.disable_frame_skip = true;
if (!vaapi_wrapper_->SubmitVAEncMiscParamBuffer(
VAEncMiscParameterTypeRateControl, sizeof(rate_control_param),
&rate_control_param))
return false;
VAEncMiscParameterFrameRate framerate_param;
memset(&framerate_param, 0, sizeof(framerate_param));
framerate_param.framerate = framerate_;
if (!vaapi_wrapper_->SubmitVAEncMiscParamBuffer(
VAEncMiscParameterTypeFrameRate, sizeof(framerate_param),
&framerate_param))
return false;
VAEncMiscParameterHRD hrd_param;
memset(&hrd_param, 0, sizeof(hrd_param));
hrd_param.buffer_size = cpb_size_;
hrd_param.initial_buffer_fullness = cpb_size_ / 2;
if (!vaapi_wrapper_->SubmitVAEncMiscParamBuffer(
VAEncMiscParameterTypeHRD, sizeof(hrd_param), &hrd_param))
return false;
return true;
}
bool VaapiVideoEncodeAccelerator::SubmitHeadersIfNeeded() {
DCHECK(current_pic_);
if (current_pic_->type != media::H264SliceHeader::kISlice)
return true;
// Submit PPS.
VAEncPackedHeaderParameterBuffer par_buffer;
memset(&par_buffer, 0, sizeof(par_buffer));
par_buffer.type = VAEncPackedHeaderSequence;
par_buffer.bit_length = packed_sps_.BytesInBuffer() * 8;
if (!vaapi_wrapper_->SubmitBuffer(VAEncPackedHeaderParameterBufferType,
sizeof(par_buffer), &par_buffer))
return false;
if (!vaapi_wrapper_->SubmitBuffer(VAEncPackedHeaderDataBufferType,
packed_sps_.BytesInBuffer(),
packed_sps_.data()))
return false;
// Submit PPS.
memset(&par_buffer, 0, sizeof(par_buffer));
par_buffer.type = VAEncPackedHeaderPicture;
par_buffer.bit_length = packed_pps_.BytesInBuffer() * 8;
if (!vaapi_wrapper_->SubmitBuffer(VAEncPackedHeaderParameterBufferType,
sizeof(par_buffer), &par_buffer))
return false;
if (!vaapi_wrapper_->SubmitBuffer(VAEncPackedHeaderDataBufferType,
packed_pps_.BytesInBuffer(),
packed_pps_.data()))
return false;
return true;
}
bool VaapiVideoEncodeAccelerator::ExecuteEncode() {
DCHECK(current_pic_);
DVLOGF(3) << "Encoding frame_num: " << current_pic_->frame_num;
return vaapi_wrapper_->ExecuteAndDestroyPendingBuffers(
current_encode_job_->input_surface->id());
}
bool VaapiVideoEncodeAccelerator::UploadFrame(
const scoped_refptr<media::VideoFrame>& frame) {
return vaapi_wrapper_->UploadVideoFrameToSurface(
frame, current_encode_job_->input_surface->id());
}
void VaapiVideoEncodeAccelerator::TryToReturnBitstreamBuffer() {
DCHECK(encoder_thread_task_runner_->BelongsToCurrentThread());
if (state_ != kEncoding)
return;
if (submitted_encode_jobs_.empty() || available_bitstream_buffers_.empty())
return;
linked_ptr<BitstreamBufferRef> buffer = available_bitstream_buffers_.front();
available_bitstream_buffers_.pop();
uint8_t* target_data = reinterpret_cast<uint8_t*>(buffer->shm->memory());
linked_ptr<EncodeJob> encode_job = submitted_encode_jobs_.front();
submitted_encode_jobs_.pop();
size_t data_size = 0;
if (!vaapi_wrapper_->DownloadAndDestroyCodedBuffer(
encode_job->coded_buffer, encode_job->input_surface->id(),
target_data, buffer->shm->size(), &data_size)) {
NOTIFY_ERROR(kPlatformFailureError, "Failed downloading coded buffer");
return;
}
DVLOGF(3) << "Returning bitstream buffer "
<< (encode_job->keyframe ? "(keyframe)" : "")
<< " id: " << buffer->id << " size: " << data_size;
child_task_runner_->PostTask(
FROM_HERE,
base::Bind(&Client::BitstreamBufferReady, client_, buffer->id, data_size,
encode_job->keyframe, encode_job->timestamp));
}
void VaapiVideoEncodeAccelerator::Encode(
const scoped_refptr<media::VideoFrame>& frame,
bool force_keyframe) {
DVLOGF(3) << "Frame timestamp: " << frame->timestamp().InMilliseconds()
<< " force_keyframe: " << force_keyframe;
DCHECK(child_task_runner_->BelongsToCurrentThread());
encoder_thread_task_runner_->PostTask(
FROM_HERE, base::Bind(&VaapiVideoEncodeAccelerator::EncodeTask,
base::Unretained(this), frame, force_keyframe));
}
bool VaapiVideoEncodeAccelerator::PrepareNextJob(base::TimeDelta timestamp) {
if (available_va_surface_ids_.size() < kMinSurfacesToEncode)
return false;
DCHECK(!current_encode_job_);
current_encode_job_.reset(new EncodeJob());
if (!vaapi_wrapper_->CreateCodedBuffer(output_buffer_byte_size_,
&current_encode_job_->coded_buffer)) {
NOTIFY_ERROR(kPlatformFailureError, "Failed creating coded buffer");
return false;
}
current_encode_job_->timestamp = timestamp;
current_encode_job_->input_surface = new VASurface(
available_va_surface_ids_.back(), coded_size_,
vaapi_wrapper_->va_surface_format(), va_surface_release_cb_);
available_va_surface_ids_.pop_back();
current_encode_job_->recon_surface = new VASurface(
available_va_surface_ids_.back(), coded_size_,
vaapi_wrapper_->va_surface_format(), va_surface_release_cb_);
available_va_surface_ids_.pop_back();
// Reference surfaces are needed until the job is done, but they get
// removed from ref_pic_list0_ when it's full at the end of job submission.
// Keep refs to them along with the job and only release after sync.
current_encode_job_->reference_surfaces = ref_pic_list0_;
return true;
}
void VaapiVideoEncodeAccelerator::EncodeTask(
const scoped_refptr<media::VideoFrame>& frame,
bool force_keyframe) {
DCHECK(encoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_NE(state_, kUninitialized);
encoder_input_queue_.push(
make_linked_ptr(new InputFrameRef(frame, force_keyframe)));
EncodeFrameTask();
}
void VaapiVideoEncodeAccelerator::EncodeFrameTask() {
DCHECK(encoder_thread_task_runner_->BelongsToCurrentThread());
if (state_ != kEncoding || encoder_input_queue_.empty())
return;
if (!PrepareNextJob(encoder_input_queue_.front()->frame->timestamp())) {
DVLOGF(4) << "Not ready for next frame yet";
return;
}
linked_ptr<InputFrameRef> frame_ref = encoder_input_queue_.front();
encoder_input_queue_.pop();
if (!UploadFrame(frame_ref->frame)) {
NOTIFY_ERROR(kPlatformFailureError, "Failed uploading source frame to HW.");
return;
}
BeginFrame(frame_ref->force_keyframe || encoding_parameters_changed_);
encoding_parameters_changed_ = false;
if (!SubmitFrameParameters()) {
NOTIFY_ERROR(kPlatformFailureError, "Failed submitting frame parameters.");
return;
}
if (!SubmitHeadersIfNeeded()) {
NOTIFY_ERROR(kPlatformFailureError, "Failed submitting frame headers.");
return;
}
if (!ExecuteEncode()) {
NOTIFY_ERROR(kPlatformFailureError, "Failed submitting encode job to HW.");
return;
}
EndFrame();
TryToReturnBitstreamBuffer();
}
void VaapiVideoEncodeAccelerator::UseOutputBitstreamBuffer(
const media::BitstreamBuffer& buffer) {
DVLOGF(4) << "id: " << buffer.id();
DCHECK(child_task_runner_->BelongsToCurrentThread());
if (buffer.size() < output_buffer_byte_size_) {
NOTIFY_ERROR(kInvalidArgumentError, "Provided bitstream buffer too small");
return;
}
std::unique_ptr<SharedMemoryRegion> shm(
new SharedMemoryRegion(buffer, false));
if (!shm->Map()) {
NOTIFY_ERROR(kPlatformFailureError, "Failed mapping shared memory.");
return;
}
std::unique_ptr<BitstreamBufferRef> buffer_ref(
new BitstreamBufferRef(buffer.id(), std::move(shm)));
encoder_thread_task_runner_->PostTask(
FROM_HERE,
base::Bind(&VaapiVideoEncodeAccelerator::UseOutputBitstreamBufferTask,
base::Unretained(this), base::Passed(&buffer_ref)));
}
void VaapiVideoEncodeAccelerator::UseOutputBitstreamBufferTask(
std::unique_ptr<BitstreamBufferRef> buffer_ref) {
DCHECK(encoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_NE(state_, kUninitialized);
available_bitstream_buffers_.push(make_linked_ptr(buffer_ref.release()));
TryToReturnBitstreamBuffer();
}
void VaapiVideoEncodeAccelerator::RequestEncodingParametersChange(
uint32_t bitrate,
uint32_t framerate) {
DVLOGF(2) << "bitrate: " << bitrate << " framerate: " << framerate;
DCHECK(child_task_runner_->BelongsToCurrentThread());
encoder_thread_task_runner_->PostTask(
FROM_HERE,
base::Bind(
&VaapiVideoEncodeAccelerator::RequestEncodingParametersChangeTask,
base::Unretained(this), bitrate, framerate));
}
void VaapiVideoEncodeAccelerator::UpdateRates(uint32_t bitrate,
uint32_t framerate) {
if (encoder_thread_.IsRunning())
DCHECK(encoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_NE(bitrate, 0u);
DCHECK_NE(framerate, 0u);
bitrate_ = bitrate;
framerate_ = framerate;
cpb_size_ = bitrate_ * kCPBWindowSizeMs / 1000;
}
void VaapiVideoEncodeAccelerator::RequestEncodingParametersChangeTask(
uint32_t bitrate,
uint32_t framerate) {
DVLOGF(2) << "bitrate: " << bitrate << " framerate: " << framerate;
DCHECK(encoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_NE(state_, kUninitialized);
// This is a workaround to zero being temporarily, as part of the initial
// setup, provided by the webrtc video encode and a zero bitrate and
// framerate not being accepted by VAAPI
// TODO: This code is common with v4l2_video_encode_accelerator.cc, perhaps
// it could be pulled up to RTCVideoEncoder
if (bitrate < 1)
bitrate = 1;
if (framerate < 1)
framerate = 1;
if (bitrate_ == bitrate && framerate_ == framerate)
return;
UpdateRates(bitrate, framerate);
UpdateSPS();
GeneratePackedSPS();
// Submit new parameters along with next frame that will be processed.
encoding_parameters_changed_ = true;
}
void VaapiVideoEncodeAccelerator::Destroy() {
DCHECK(child_task_runner_->BelongsToCurrentThread());
// Can't call client anymore after Destroy() returns.
client_ptr_factory_.reset();
weak_this_ptr_factory_.InvalidateWeakPtrs();
// Early-exit encoder tasks if they are running and join the thread.
if (encoder_thread_.IsRunning()) {
encoder_thread_.message_loop()->PostTask(
FROM_HERE, base::Bind(&VaapiVideoEncodeAccelerator::DestroyTask,
base::Unretained(this)));
encoder_thread_.Stop();
}
delete this;
}
void VaapiVideoEncodeAccelerator::DestroyTask() {
DVLOGF(2);
DCHECK(encoder_thread_task_runner_->BelongsToCurrentThread());
SetState(kError);
}
void VaapiVideoEncodeAccelerator::UpdateSPS() {
memset(&current_sps_, 0, sizeof(media::H264SPS));
// Spec A.2 and A.3.
switch (profile_) {
case media::H264PROFILE_BASELINE:
// Due to crbug.com/345569, we don't distinguish between constrained
// and non-constrained baseline profiles. Since many codecs can't do
// non-constrained, and constrained is usually what we mean (and it's a
// subset of non-constrained), default to it.
current_sps_.profile_idc = media::H264SPS::kProfileIDCBaseline;
current_sps_.constraint_set0_flag = true;
break;
case media::H264PROFILE_MAIN:
current_sps_.profile_idc = media::H264SPS::kProfileIDCMain;
current_sps_.constraint_set1_flag = true;
break;
case media::H264PROFILE_HIGH:
current_sps_.profile_idc = media::H264SPS::kProfileIDCHigh;
break;
default:
NOTIMPLEMENTED();
return;
}
current_sps_.level_idc = kDefaultLevelIDC;
current_sps_.seq_parameter_set_id = 0;
current_sps_.chroma_format_idc = kChromaFormatIDC;
DCHECK_GE(idr_period_, 1u << 4);
current_sps_.log2_max_frame_num_minus4 = Log2OfPowerOf2(idr_period_) - 4;
current_sps_.pic_order_cnt_type = 0;
current_sps_.log2_max_pic_order_cnt_lsb_minus4 =
Log2OfPowerOf2(idr_period_ * 2) - 4;
current_sps_.max_num_ref_frames = max_ref_idx_l0_size_;
current_sps_.frame_mbs_only_flag = true;
DCHECK_GT(mb_width_, 0u);
DCHECK_GT(mb_height_, 0u);
current_sps_.pic_width_in_mbs_minus1 = mb_width_ - 1;
DCHECK(current_sps_.frame_mbs_only_flag);
current_sps_.pic_height_in_map_units_minus1 = mb_height_ - 1;
if (visible_size_ != coded_size_) {
// Visible size differs from coded size, fill crop information.
current_sps_.frame_cropping_flag = true;
DCHECK(!current_sps_.separate_colour_plane_flag);
// Spec table 6-1. Only 4:2:0 for now.
DCHECK_EQ(current_sps_.chroma_format_idc, 1);
// Spec 7.4.2.1.1. Crop is in crop units, which is 2 pixels for 4:2:0.
const unsigned int crop_unit_x = 2;
const unsigned int crop_unit_y = 2 * (2 - current_sps_.frame_mbs_only_flag);
current_sps_.frame_crop_left_offset = 0;
current_sps_.frame_crop_right_offset =
(coded_size_.width() - visible_size_.width()) / crop_unit_x;
current_sps_.frame_crop_top_offset = 0;
current_sps_.frame_crop_bottom_offset =
(coded_size_.height() - visible_size_.height()) / crop_unit_y;
}
current_sps_.vui_parameters_present_flag = true;
current_sps_.timing_info_present_flag = true;
current_sps_.num_units_in_tick = 1;
current_sps_.time_scale = framerate_ * 2; // See equation D-2 in spec.
current_sps_.fixed_frame_rate_flag = true;
current_sps_.nal_hrd_parameters_present_flag = true;
// H.264 spec ch. E.2.2.
current_sps_.cpb_cnt_minus1 = 0;
current_sps_.bit_rate_scale = kBitRateScale;
current_sps_.cpb_size_scale = kCPBSizeScale;
current_sps_.bit_rate_value_minus1[0] =
(bitrate_ >>
(kBitRateScale + media::H264SPS::kBitRateScaleConstantTerm)) -
1;
current_sps_.cpb_size_value_minus1[0] =
(cpb_size_ >>
(kCPBSizeScale + media::H264SPS::kCPBSizeScaleConstantTerm)) -
1;
current_sps_.cbr_flag[0] = true;
current_sps_.initial_cpb_removal_delay_length_minus_1 =
media::H264SPS::kDefaultInitialCPBRemovalDelayLength - 1;
current_sps_.cpb_removal_delay_length_minus1 =
media::H264SPS::kDefaultInitialCPBRemovalDelayLength - 1;
current_sps_.dpb_output_delay_length_minus1 =
media::H264SPS::kDefaultDPBOutputDelayLength - 1;
current_sps_.time_offset_length = media::H264SPS::kDefaultTimeOffsetLength;
current_sps_.low_delay_hrd_flag = false;
}
void VaapiVideoEncodeAccelerator::GeneratePackedSPS() {
packed_sps_.Reset();
packed_sps_.BeginNALU(media::H264NALU::kSPS, 3);
packed_sps_.AppendBits(8, current_sps_.profile_idc);
packed_sps_.AppendBool(current_sps_.constraint_set0_flag);
packed_sps_.AppendBool(current_sps_.constraint_set1_flag);
packed_sps_.AppendBool(current_sps_.constraint_set2_flag);
packed_sps_.AppendBool(current_sps_.constraint_set3_flag);
packed_sps_.AppendBool(current_sps_.constraint_set4_flag);
packed_sps_.AppendBool(current_sps_.constraint_set5_flag);
packed_sps_.AppendBits(2, 0); // reserved_zero_2bits
packed_sps_.AppendBits(8, current_sps_.level_idc);
packed_sps_.AppendUE(current_sps_.seq_parameter_set_id);
if (current_sps_.profile_idc == media::H264SPS::kProfileIDCHigh) {
packed_sps_.AppendUE(current_sps_.chroma_format_idc);
if (current_sps_.chroma_format_idc == 3)
packed_sps_.AppendBool(current_sps_.separate_colour_plane_flag);
packed_sps_.AppendUE(current_sps_.bit_depth_luma_minus8);
packed_sps_.AppendUE(current_sps_.bit_depth_chroma_minus8);
packed_sps_.AppendBool(current_sps_.qpprime_y_zero_transform_bypass_flag);
packed_sps_.AppendBool(current_sps_.seq_scaling_matrix_present_flag);
CHECK(!current_sps_.seq_scaling_matrix_present_flag);
}
packed_sps_.AppendUE(current_sps_.log2_max_frame_num_minus4);
packed_sps_.AppendUE(current_sps_.pic_order_cnt_type);
if (current_sps_.pic_order_cnt_type == 0)
packed_sps_.AppendUE(current_sps_.log2_max_pic_order_cnt_lsb_minus4);
else if (current_sps_.pic_order_cnt_type == 1) {
CHECK(1);
}
packed_sps_.AppendUE(current_sps_.max_num_ref_frames);
packed_sps_.AppendBool(current_sps_.gaps_in_frame_num_value_allowed_flag);
packed_sps_.AppendUE(current_sps_.pic_width_in_mbs_minus1);
packed_sps_.AppendUE(current_sps_.pic_height_in_map_units_minus1);
packed_sps_.AppendBool(current_sps_.frame_mbs_only_flag);
if (!current_sps_.frame_mbs_only_flag)
packed_sps_.AppendBool(current_sps_.mb_adaptive_frame_field_flag);
packed_sps_.AppendBool(current_sps_.direct_8x8_inference_flag);
packed_sps_.AppendBool(current_sps_.frame_cropping_flag);
if (current_sps_.frame_cropping_flag) {
packed_sps_.AppendUE(current_sps_.frame_crop_left_offset);
packed_sps_.AppendUE(current_sps_.frame_crop_right_offset);
packed_sps_.AppendUE(current_sps_.frame_crop_top_offset);
packed_sps_.AppendUE(current_sps_.frame_crop_bottom_offset);
}
packed_sps_.AppendBool(current_sps_.vui_parameters_present_flag);
if (current_sps_.vui_parameters_present_flag) {
packed_sps_.AppendBool(false); // aspect_ratio_info_present_flag
packed_sps_.AppendBool(false); // overscan_info_present_flag
packed_sps_.AppendBool(false); // video_signal_type_present_flag
packed_sps_.AppendBool(false); // chroma_loc_info_present_flag
packed_sps_.AppendBool(current_sps_.timing_info_present_flag);
if (current_sps_.timing_info_present_flag) {
packed_sps_.AppendBits(32, current_sps_.num_units_in_tick);
packed_sps_.AppendBits(32, current_sps_.time_scale);
packed_sps_.AppendBool(current_sps_.fixed_frame_rate_flag);
}
packed_sps_.AppendBool(current_sps_.nal_hrd_parameters_present_flag);
if (current_sps_.nal_hrd_parameters_present_flag) {
packed_sps_.AppendUE(current_sps_.cpb_cnt_minus1);
packed_sps_.AppendBits(4, current_sps_.bit_rate_scale);
packed_sps_.AppendBits(4, current_sps_.cpb_size_scale);
CHECK_LT(base::checked_cast<size_t>(current_sps_.cpb_cnt_minus1),
arraysize(current_sps_.bit_rate_value_minus1));
for (int i = 0; i <= current_sps_.cpb_cnt_minus1; ++i) {
packed_sps_.AppendUE(current_sps_.bit_rate_value_minus1[i]);
packed_sps_.AppendUE(current_sps_.cpb_size_value_minus1[i]);
packed_sps_.AppendBool(current_sps_.cbr_flag[i]);
}
packed_sps_.AppendBits(
5, current_sps_.initial_cpb_removal_delay_length_minus_1);
packed_sps_.AppendBits(5, current_sps_.cpb_removal_delay_length_minus1);
packed_sps_.AppendBits(5, current_sps_.dpb_output_delay_length_minus1);
packed_sps_.AppendBits(5, current_sps_.time_offset_length);
}
packed_sps_.AppendBool(false); // vcl_hrd_parameters_flag
if (current_sps_.nal_hrd_parameters_present_flag)
packed_sps_.AppendBool(current_sps_.low_delay_hrd_flag);
packed_sps_.AppendBool(false); // pic_struct_present_flag
packed_sps_.AppendBool(true); // bitstream_restriction_flag
packed_sps_.AppendBool(false); // motion_vectors_over_pic_boundaries_flag
packed_sps_.AppendUE(2); // max_bytes_per_pic_denom
packed_sps_.AppendUE(1); // max_bits_per_mb_denom
packed_sps_.AppendUE(16); // log2_max_mv_length_horizontal
packed_sps_.AppendUE(16); // log2_max_mv_length_vertical
// Explicitly set max_num_reorder_frames to 0 to allow the decoder to
// output pictures early.
packed_sps_.AppendUE(0); // max_num_reorder_frames
// The value of max_dec_frame_buffering shall be greater than or equal to
// max_num_ref_frames.
const unsigned int max_dec_frame_buffering =
current_sps_.max_num_ref_frames;
packed_sps_.AppendUE(max_dec_frame_buffering);
}
packed_sps_.FinishNALU();
}
void VaapiVideoEncodeAccelerator::UpdatePPS() {
memset(&current_pps_, 0, sizeof(media::H264PPS));
current_pps_.seq_parameter_set_id = current_sps_.seq_parameter_set_id;
current_pps_.pic_parameter_set_id = 0;
current_pps_.entropy_coding_mode_flag =
current_sps_.profile_idc >= media::H264SPS::kProfileIDCMain;
CHECK_GT(max_ref_idx_l0_size_, 0u);
current_pps_.num_ref_idx_l0_default_active_minus1 = max_ref_idx_l0_size_ - 1;
current_pps_.num_ref_idx_l1_default_active_minus1 = 0;
DCHECK_LE(qp_, 51u);
current_pps_.pic_init_qp_minus26 = qp_ - 26;
current_pps_.deblocking_filter_control_present_flag = true;
current_pps_.transform_8x8_mode_flag =
(current_sps_.profile_idc == media::H264SPS::kProfileIDCHigh);
}
void VaapiVideoEncodeAccelerator::GeneratePackedPPS() {
packed_pps_.Reset();
packed_pps_.BeginNALU(media::H264NALU::kPPS, 3);
packed_pps_.AppendUE(current_pps_.pic_parameter_set_id);
packed_pps_.AppendUE(current_pps_.seq_parameter_set_id);
packed_pps_.AppendBool(current_pps_.entropy_coding_mode_flag);
packed_pps_.AppendBool(
current_pps_.bottom_field_pic_order_in_frame_present_flag);
CHECK_EQ(current_pps_.num_slice_groups_minus1, 0);
packed_pps_.AppendUE(current_pps_.num_slice_groups_minus1);
packed_pps_.AppendUE(current_pps_.num_ref_idx_l0_default_active_minus1);
packed_pps_.AppendUE(current_pps_.num_ref_idx_l1_default_active_minus1);
packed_pps_.AppendBool(current_pps_.weighted_pred_flag);
packed_pps_.AppendBits(2, current_pps_.weighted_bipred_idc);
packed_pps_.AppendSE(current_pps_.pic_init_qp_minus26);
packed_pps_.AppendSE(current_pps_.pic_init_qs_minus26);
packed_pps_.AppendSE(current_pps_.chroma_qp_index_offset);
packed_pps_.AppendBool(current_pps_.deblocking_filter_control_present_flag);
packed_pps_.AppendBool(current_pps_.constrained_intra_pred_flag);
packed_pps_.AppendBool(current_pps_.redundant_pic_cnt_present_flag);
packed_pps_.AppendBool(current_pps_.transform_8x8_mode_flag);
packed_pps_.AppendBool(current_pps_.pic_scaling_matrix_present_flag);
DCHECK(!current_pps_.pic_scaling_matrix_present_flag);
packed_pps_.AppendSE(current_pps_.second_chroma_qp_index_offset);
packed_pps_.FinishNALU();
}
void VaapiVideoEncodeAccelerator::SetState(State state) {
// Only touch state on encoder thread, unless it's not running.
if (encoder_thread_.IsRunning() &&
!encoder_thread_task_runner_->BelongsToCurrentThread()) {
encoder_thread_task_runner_->PostTask(
FROM_HERE, base::Bind(&VaapiVideoEncodeAccelerator::SetState,
base::Unretained(this), state));
return;
}
DVLOGF(1) << "setting state to: " << state;
state_ = state;
}
void VaapiVideoEncodeAccelerator::NotifyError(Error error) {
if (!child_task_runner_->BelongsToCurrentThread()) {
child_task_runner_->PostTask(
FROM_HERE, base::Bind(&VaapiVideoEncodeAccelerator::NotifyError,
weak_this_, error));
return;
}
if (client_) {
client_->NotifyError(error);
client_ptr_factory_.reset();
}
}
VaapiVideoEncodeAccelerator::EncodeJob::EncodeJob()
: coded_buffer(VA_INVALID_ID), keyframe(false) {}
VaapiVideoEncodeAccelerator::EncodeJob::~EncodeJob() {}
} // namespace media