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webrtc / src / e4f96501fc5b3e6de0d1ccd262372afcda1f5b4f / . / webrtc / modules / video_coding / codecs / vp8 / vp8_impl.cc
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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/modules/video_coding/codecs/vp8/vp8_impl.h"
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <algorithm>
// NOTE(ajm): Path provided by gyp.
#include "libyuv/scale.h" // NOLINT
#include "libyuv/convert.h" // NOLINT
#include "webrtc/base/checks.h"
#include "webrtc/base/trace_event.h"
#include "webrtc/common.h"
#include "webrtc/common_types.h"
#include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
#include "webrtc/modules/interface/module_common_types.h"
#include "webrtc/modules/video_coding/codecs/interface/video_codec_interface.h"
#include "webrtc/modules/video_coding/codecs/vp8/include/vp8_common_types.h"
#include "webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h"
#include "webrtc/modules/video_coding/codecs/vp8/temporal_layers.h"
#include "webrtc/system_wrappers/interface/tick_util.h"
namespace webrtc {
namespace {
enum { kVp8ErrorPropagationTh = 30 };
enum { kVp832ByteAlign = 32 };
// VP8 denoiser states.
enum denoiserState {
kDenoiserOff,
kDenoiserOnYOnly,
kDenoiserOnYUV,
kDenoiserOnYUVAggressive,
// Adaptive mode defaults to kDenoiserOnYUV on key frame, but may switch
// to kDenoiserOnYUVAggressive based on a computed noise metric.
kDenoiserOnAdaptive
};
// Greatest common divisior
int GCD(int a, int b) {
int c = a % b;
while (c != 0) {
a = b;
b = c;
c = a % b;
}
return b;
}
std::vector<int> GetStreamBitratesKbps(const VideoCodec& codec,
int bitrate_to_allocate_kbps) {
if (codec.numberOfSimulcastStreams <= 1) {
return std::vector<int>(1, bitrate_to_allocate_kbps);
}
std::vector<int> bitrates_kbps(codec.numberOfSimulcastStreams);
// Allocate min -> target bitrates as long as we have bitrate to spend.
size_t last_active_stream = 0;
for (size_t i = 0;
i < static_cast<size_t>(codec.numberOfSimulcastStreams) &&
bitrate_to_allocate_kbps >=
static_cast<int>(codec.simulcastStream[i].minBitrate);
++i) {
last_active_stream = i;
int allocated_bitrate_kbps =
std::min(static_cast<int>(codec.simulcastStream[i].targetBitrate),
bitrate_to_allocate_kbps);
bitrates_kbps[i] = allocated_bitrate_kbps;
bitrate_to_allocate_kbps -= allocated_bitrate_kbps;
}
// Spend additional bits on the highest-quality active layer, up to max
// bitrate.
// TODO(pbos): Consider spending additional bits on last_active_stream-1 down
// to 0 and not just the top layer when we have additional bitrate to spend.
int allocated_bitrate_kbps = std::min(
static_cast<int>(codec.simulcastStream[last_active_stream].maxBitrate -
bitrates_kbps[last_active_stream]),
bitrate_to_allocate_kbps);
bitrates_kbps[last_active_stream] += allocated_bitrate_kbps;
bitrate_to_allocate_kbps -= allocated_bitrate_kbps;
// Make sure we can always send something. Suspending below min bitrate is
// controlled outside the codec implementation and is not overriden by this.
if (bitrates_kbps[0] < static_cast<int>(codec.simulcastStream[0].minBitrate))
bitrates_kbps[0] = static_cast<int>(codec.simulcastStream[0].minBitrate);
return bitrates_kbps;
}
uint32_t SumStreamMaxBitrate(int streams, const VideoCodec& codec) {
uint32_t bitrate_sum = 0;
for (int i = 0; i < streams; ++i) {
bitrate_sum += codec.simulcastStream[i].maxBitrate;
}
return bitrate_sum;
}
int NumberOfStreams(const VideoCodec& codec) {
int streams =
codec.numberOfSimulcastStreams < 1 ? 1 : codec.numberOfSimulcastStreams;
uint32_t simulcast_max_bitrate = SumStreamMaxBitrate(streams, codec);
if (simulcast_max_bitrate == 0) {
streams = 1;
}
return streams;
}
bool ValidSimulcastResolutions(const VideoCodec& codec, int num_streams) {
if (codec.width != codec.simulcastStream[num_streams - 1].width ||
codec.height != codec.simulcastStream[num_streams - 1].height) {
return false;
}
for (int i = 0; i < num_streams; ++i) {
if (codec.width * codec.simulcastStream[i].height !=
codec.height * codec.simulcastStream[i].width) {
return false;
}
}
return true;
}
int NumStreamsDisabled(std::vector<bool>& streams) {
int num_disabled = 0;
for (bool stream : streams) {
if (!stream)
++num_disabled;
}
return num_disabled;
}
} // namespace
const float kTl1MaxTimeToDropFrames = 20.0f;
VP8EncoderImpl::VP8EncoderImpl()
: encoded_complete_callback_(NULL),
inited_(false),
timestamp_(0),
feedback_mode_(false),
qp_max_(56), // Setting for max quantizer.
cpu_speed_default_(-6),
rc_max_intra_target_(0),
token_partitions_(VP8_ONE_TOKENPARTITION),
down_scale_requested_(false),
down_scale_bitrate_(0),
tl0_frame_dropper_(),
tl1_frame_dropper_(kTl1MaxTimeToDropFrames),
key_frame_request_(kMaxSimulcastStreams, false),
quality_scaler_enabled_(false) {
uint32_t seed = static_cast<uint32_t>(TickTime::MillisecondTimestamp());
srand(seed);
picture_id_.reserve(kMaxSimulcastStreams);
last_key_frame_picture_id_.reserve(kMaxSimulcastStreams);
temporal_layers_.reserve(kMaxSimulcastStreams);
raw_images_.reserve(kMaxSimulcastStreams);
encoded_images_.reserve(kMaxSimulcastStreams);
send_stream_.reserve(kMaxSimulcastStreams);
cpu_speed_.assign(kMaxSimulcastStreams, -6); // Set default to -6.
encoders_.reserve(kMaxSimulcastStreams);
configurations_.reserve(kMaxSimulcastStreams);
downsampling_factors_.reserve(kMaxSimulcastStreams);
}
VP8EncoderImpl::~VP8EncoderImpl() {
Release();
}
int VP8EncoderImpl::Release() {
int ret_val = WEBRTC_VIDEO_CODEC_OK;
while (!encoded_images_.empty()) {
EncodedImage& image = encoded_images_.back();
delete [] image._buffer;
encoded_images_.pop_back();
}
while (!encoders_.empty()) {
vpx_codec_ctx_t& encoder = encoders_.back();
if (vpx_codec_destroy(&encoder)) {
ret_val = WEBRTC_VIDEO_CODEC_MEMORY;
}
encoders_.pop_back();
}
configurations_.clear();
send_stream_.clear();
cpu_speed_.clear();
while (!raw_images_.empty()) {
vpx_img_free(&raw_images_.back());
raw_images_.pop_back();
}
while (!temporal_layers_.empty()) {
delete temporal_layers_.back();
temporal_layers_.pop_back();
}
inited_ = false;
return ret_val;
}
int VP8EncoderImpl::SetRates(uint32_t new_bitrate_kbit,
uint32_t new_framerate) {
if (!inited_) {
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
}
if (encoders_[0].err) {
return WEBRTC_VIDEO_CODEC_ERROR;
}
if (new_framerate < 1) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
if (codec_.maxBitrate > 0 && new_bitrate_kbit > codec_.maxBitrate) {
new_bitrate_kbit = codec_.maxBitrate;
}
if (new_bitrate_kbit < codec_.minBitrate) {
new_bitrate_kbit = codec_.minBitrate;
}
if (codec_.numberOfSimulcastStreams > 0 &&
new_bitrate_kbit < codec_.simulcastStream[0].minBitrate) {
new_bitrate_kbit = codec_.simulcastStream[0].minBitrate;
}
codec_.maxFramerate = new_framerate;
if (encoders_.size() == 1) {
// 1:1.
// Calculate a rough limit for when to trigger a potental down scale.
uint32_t k_pixels_per_frame = codec_.width * codec_.height / 1000;
// TODO(pwestin): we currently lack CAMA, this is a temporary fix to work
// around the current limitations.
// Only trigger keyframes if we are allowed to scale down.
if (configurations_[0].rc_resize_allowed) {
if (!down_scale_requested_) {
if (k_pixels_per_frame > new_bitrate_kbit) {
down_scale_requested_ = true;
down_scale_bitrate_ = new_bitrate_kbit;
key_frame_request_[0] = true;
}
} else {
if (new_bitrate_kbit > (2 * down_scale_bitrate_) ||
new_bitrate_kbit < (down_scale_bitrate_ / 2)) {
down_scale_requested_ = false;
}
}
}
} else {
// If we have more than 1 stream, reduce the qp_max for the low resolution
// stream if frame rate is not too low. The trade-off with lower qp_max is
// possibly more dropped frames, so we only do this if the frame rate is
// above some threshold (base temporal layer is down to 1/4 for 3 layers).
// We may want to condition this on bitrate later.
if (new_framerate > 20) {
configurations_[encoders_.size() - 1].rc_max_quantizer = 45;
} else {
// Go back to default value set in InitEncode.
configurations_[encoders_.size() - 1].rc_max_quantizer = qp_max_;
}
}
std::vector<int> stream_bitrates =
GetStreamBitratesKbps(codec_, new_bitrate_kbit);
size_t stream_idx = encoders_.size() - 1;
for (size_t i = 0; i < encoders_.size(); ++i, --stream_idx) {
if (encoders_.size() > 1)
SetStreamState(stream_bitrates[stream_idx] > 0, stream_idx);
unsigned int target_bitrate = stream_bitrates[stream_idx];
unsigned int max_bitrate = codec_.maxBitrate;
int framerate = new_framerate;
// TODO(holmer): This is a temporary hack for screensharing, where we
// interpret the startBitrate as the encoder target bitrate. This is
// to allow for a different max bitrate, so if the codec can't meet
// the target we still allow it to overshoot up to the max before dropping
// frames. This hack should be improved.
if (codec_.targetBitrate > 0 &&
(codec_.codecSpecific.VP8.numberOfTemporalLayers == 2 ||
codec_.simulcastStream[0].numberOfTemporalLayers == 2)) {
int tl0_bitrate = std::min(codec_.targetBitrate, target_bitrate);
max_bitrate = std::min(codec_.maxBitrate, target_bitrate);
target_bitrate = tl0_bitrate;
}
configurations_[i].rc_target_bitrate = target_bitrate;
temporal_layers_[stream_idx]->ConfigureBitrates(target_bitrate,
max_bitrate,
framerate,
&configurations_[i]);
if (vpx_codec_enc_config_set(&encoders_[i], &configurations_[i])) {
return WEBRTC_VIDEO_CODEC_ERROR;
}
}
quality_scaler_.ReportFramerate(new_framerate);
return WEBRTC_VIDEO_CODEC_OK;
}
void VP8EncoderImpl::SetStreamState(bool send_stream,
int stream_idx) {
if (send_stream && !send_stream_[stream_idx]) {
// Need a key frame if we have not sent this stream before.
key_frame_request_[stream_idx] = true;
}
send_stream_[stream_idx] = send_stream;
}
void VP8EncoderImpl::SetupTemporalLayers(int num_streams,
int num_temporal_layers,
const VideoCodec& codec) {
const Config default_options;
const TemporalLayers::Factory& tl_factory =
(codec.extra_options ? codec.extra_options : &default_options)
->Get<TemporalLayers::Factory>();
if (num_streams == 1) {
if (codec.mode == kScreensharing) {
// Special mode when screensharing on a single stream.
temporal_layers_.push_back(
new ScreenshareLayers(num_temporal_layers, rand()));
} else {
temporal_layers_.push_back(
tl_factory.Create(num_temporal_layers, rand()));
}
} else {
for (int i = 0; i < num_streams; ++i) {
// TODO(andresp): crash if layers is invalid.
int layers = codec.simulcastStream[i].numberOfTemporalLayers;
if (layers < 1) layers = 1;
temporal_layers_.push_back(tl_factory.Create(layers, rand()));
}
}
}
int VP8EncoderImpl::InitEncode(const VideoCodec* inst,
int number_of_cores,
size_t /*maxPayloadSize */) {
if (inst == NULL) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
if (inst->maxFramerate < 1) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
// allow zero to represent an unspecified maxBitRate
if (inst->maxBitrate > 0 && inst->startBitrate > inst->maxBitrate) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
if (inst->width <= 1 || inst->height <= 1) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
if (number_of_cores < 1) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
if (inst->codecSpecific.VP8.feedbackModeOn &&
inst->numberOfSimulcastStreams > 1) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
if (inst->codecSpecific.VP8.automaticResizeOn &&
inst->numberOfSimulcastStreams > 1) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
int retVal = Release();
if (retVal < 0) {
return retVal;
}
int number_of_streams = NumberOfStreams(*inst);
bool doing_simulcast = (number_of_streams > 1);
if (doing_simulcast && !ValidSimulcastResolutions(*inst, number_of_streams)) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
int num_temporal_layers = doing_simulcast ?
inst->simulcastStream[0].numberOfTemporalLayers :
inst->codecSpecific.VP8.numberOfTemporalLayers;
// TODO(andresp): crash if num temporal layers is bananas.
if (num_temporal_layers < 1) num_temporal_layers = 1;
SetupTemporalLayers(number_of_streams, num_temporal_layers, *inst);
feedback_mode_ = inst->codecSpecific.VP8.feedbackModeOn;
timestamp_ = 0;
codec_ = *inst;
// Code expects simulcastStream resolutions to be correct, make sure they are
// filled even when there are no simulcast layers.
if (codec_.numberOfSimulcastStreams == 0) {
codec_.simulcastStream[0].width = codec_.width;
codec_.simulcastStream[0].height = codec_.height;
}
picture_id_.resize(number_of_streams);
last_key_frame_picture_id_.resize(number_of_streams);
encoded_images_.resize(number_of_streams);
encoders_.resize(number_of_streams);
configurations_.resize(number_of_streams);
downsampling_factors_.resize(number_of_streams);
raw_images_.resize(number_of_streams);
send_stream_.resize(number_of_streams);
send_stream_[0] = true; // For non-simulcast case.
cpu_speed_.resize(number_of_streams);
std::fill(key_frame_request_.begin(), key_frame_request_.end(), false);
int idx = number_of_streams - 1;
for (int i = 0; i < (number_of_streams - 1); ++i, --idx) {
int gcd = GCD(inst->simulcastStream[idx].width,
inst->simulcastStream[idx-1].width);
downsampling_factors_[i].num = inst->simulcastStream[idx].width / gcd;
downsampling_factors_[i].den = inst->simulcastStream[idx - 1].width / gcd;
send_stream_[i] = false;
}
if (number_of_streams > 1) {
send_stream_[number_of_streams - 1] = false;
downsampling_factors_[number_of_streams - 1].num = 1;
downsampling_factors_[number_of_streams - 1].den = 1;
}
for (int i = 0; i < number_of_streams; ++i) {
// Random start, 16 bits is enough.
picture_id_[i] = static_cast<uint16_t>(rand()) & 0x7FFF;
last_key_frame_picture_id_[i] = -1;
// allocate memory for encoded image
if (encoded_images_[i]._buffer != NULL) {
delete [] encoded_images_[i]._buffer;
}
encoded_images_[i]._size = CalcBufferSize(kI420,
codec_.width, codec_.height);
encoded_images_[i]._buffer = new uint8_t[encoded_images_[i]._size];
encoded_images_[i]._completeFrame = true;
}
// populate encoder configuration with default values
if (vpx_codec_enc_config_default(vpx_codec_vp8_cx(),
&configurations_[0], 0)) {
return WEBRTC_VIDEO_CODEC_ERROR;
}
// setting the time base of the codec
configurations_[0].g_timebase.num = 1;
configurations_[0].g_timebase.den = 90000;
configurations_[0].g_lag_in_frames = 0; // 0- no frame lagging
// Set the error resilience mode according to user settings.
switch (inst->codecSpecific.VP8.resilience) {
case kResilienceOff:
// TODO(marpan): We should set keep error resilience off for this mode,
// independent of temporal layer settings, and make sure we set
// |codecSpecific.VP8.resilience| = |kResilientStream| at higher level
// code if we want to get error resilience on.
configurations_[0].g_error_resilient = 1;
break;
case kResilientStream:
configurations_[0].g_error_resilient = 1; // TODO(holmer): Replace with
// VPX_ERROR_RESILIENT_DEFAULT when we
// drop support for libvpx 9.6.0.
break;
case kResilientFrames:
#ifdef INDEPENDENT_PARTITIONS
configurations_[0]-g_error_resilient = VPX_ERROR_RESILIENT_DEFAULT |
VPX_ERROR_RESILIENT_PARTITIONS;
break;
#else
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; // Not supported
#endif
}
// rate control settings
configurations_[0].rc_dropframe_thresh =
inst->codecSpecific.VP8.frameDroppingOn ? 30 : 0;
configurations_[0].rc_end_usage = VPX_CBR;
configurations_[0].g_pass = VPX_RC_ONE_PASS;
// TODO(hellner): investigate why the following two lines produce
// automaticResizeOn value of 3 when running
// WebRtcVideoMediaChannelTest.GetStatsMultipleSendStreams inside the talk
// framework.
// configurations_[0].rc_resize_allowed =
// inst->codecSpecific.VP8.automaticResizeOn ? 1 : 0;
configurations_[0].rc_resize_allowed = 0;
// Handle resizing outside of libvpx when doing single-stream.
if (inst->codecSpecific.VP8.automaticResizeOn && number_of_streams > 1) {
configurations_[0].rc_resize_allowed = 1;
}
configurations_[0].rc_min_quantizer = 2;
if (inst->qpMax >= configurations_[0].rc_min_quantizer) {
qp_max_ = inst->qpMax;
}
configurations_[0].rc_max_quantizer = qp_max_;
configurations_[0].rc_undershoot_pct = 100;
configurations_[0].rc_overshoot_pct = 15;
configurations_[0].rc_buf_initial_sz = 500;
configurations_[0].rc_buf_optimal_sz = 600;
configurations_[0].rc_buf_sz = 1000;
// Set the maximum target size of any key-frame.
rc_max_intra_target_ = MaxIntraTarget(configurations_[0].rc_buf_optimal_sz);
if (feedback_mode_) {
// Disable periodic key frames if we get feedback from the decoder
// through SLI and RPSI.
configurations_[0].kf_mode = VPX_KF_DISABLED;
} else if (inst->codecSpecific.VP8.keyFrameInterval > 0) {
configurations_[0].kf_mode = VPX_KF_AUTO;
configurations_[0].kf_max_dist = inst->codecSpecific.VP8.keyFrameInterval;
} else {
configurations_[0].kf_mode = VPX_KF_DISABLED;
}
// Allow the user to set the complexity for the base stream.
switch (inst->codecSpecific.VP8.complexity) {
case kComplexityHigh:
cpu_speed_[0] = -5;
break;
case kComplexityHigher:
cpu_speed_[0] = -4;
break;
case kComplexityMax:
cpu_speed_[0] = -3;
break;
default:
cpu_speed_[0] = -6;
break;
}
cpu_speed_default_ = cpu_speed_[0];
// Set encoding complexity (cpu_speed) based on resolution and/or platform.
cpu_speed_[0] = SetCpuSpeed(inst->width, inst->height);
for (int i = 1; i < number_of_streams; ++i) {
cpu_speed_[i] =
SetCpuSpeed(inst->simulcastStream[number_of_streams - 1 - i].width,
inst->simulcastStream[number_of_streams - 1 - i].height);
}
configurations_[0].g_w = inst->width;
configurations_[0].g_h = inst->height;
// Determine number of threads based on the image size and #cores.
// TODO(fbarchard): Consider number of Simulcast layers.
configurations_[0].g_threads = NumberOfThreads(configurations_[0].g_w,
configurations_[0].g_h,
number_of_cores);
// Creating a wrapper to the image - setting image data to NULL.
// Actual pointer will be set in encode. Setting align to 1, as it
// is meaningless (no memory allocation is done here).
vpx_img_wrap(&raw_images_[0], VPX_IMG_FMT_I420, inst->width, inst->height,
1, NULL);
if (encoders_.size() == 1) {
configurations_[0].rc_target_bitrate = inst->startBitrate;
temporal_layers_[0]->ConfigureBitrates(inst->startBitrate,
inst->maxBitrate,
inst->maxFramerate,
&configurations_[0]);
} else {
// Note the order we use is different from webm, we have lowest resolution
// at position 0 and they have highest resolution at position 0.
int stream_idx = encoders_.size() - 1;
std::vector<int> stream_bitrates =
GetStreamBitratesKbps(codec_, inst->startBitrate);
SetStreamState(stream_bitrates[stream_idx] > 0, stream_idx);
configurations_[0].rc_target_bitrate = stream_bitrates[stream_idx];
temporal_layers_[stream_idx]->ConfigureBitrates(
stream_bitrates[stream_idx], inst->maxBitrate, inst->maxFramerate,
&configurations_[0]);
--stream_idx;
for (size_t i = 1; i < encoders_.size(); ++i, --stream_idx) {
memcpy(&configurations_[i], &configurations_[0],
sizeof(configurations_[0]));
configurations_[i].g_w = inst->simulcastStream[stream_idx].width;
configurations_[i].g_h = inst->simulcastStream[stream_idx].height;
// Use 1 thread for lower resolutions.
configurations_[i].g_threads = 1;
// Setting alignment to 32 - as that ensures at least 16 for all
// planes (32 for Y, 16 for U,V). Libvpx sets the requested stride for
// the y plane, but only half of it to the u and v planes.
vpx_img_alloc(&raw_images_[i], VPX_IMG_FMT_I420,
inst->simulcastStream[stream_idx].width,
inst->simulcastStream[stream_idx].height, kVp832ByteAlign);
SetStreamState(stream_bitrates[stream_idx] > 0, stream_idx);
configurations_[i].rc_target_bitrate = stream_bitrates[stream_idx];
temporal_layers_[stream_idx]->ConfigureBitrates(
stream_bitrates[stream_idx], inst->maxBitrate, inst->maxFramerate,
&configurations_[i]);
}
}
rps_.Init();
// Disable both high-QP limits and framedropping. Both are handled by libvpx
// internally.
const int kDisabledBadQpThreshold = 64;
quality_scaler_.Init(codec_.qpMax / QualityScaler::kDefaultLowQpDenominator,
kDisabledBadQpThreshold, false);
quality_scaler_.ReportFramerate(codec_.maxFramerate);
// Only apply scaling to improve for single-layer streams. The scaling metrics
// use frame drops as a signal and is only applicable when we drop frames.
quality_scaler_enabled_ = encoders_.size() == 1 &&
configurations_[0].rc_dropframe_thresh > 0 &&
codec_.codecSpecific.VP8.automaticResizeOn;
return InitAndSetControlSettings();
}
int VP8EncoderImpl::SetCpuSpeed(int width, int height) {
#if defined(WEBRTC_ARCH_ARM) || defined(WEBRTC_ARCH_ARM64)
// On mobile platform, always set to -12 to leverage between cpu usage
// and video quality.
return -12;
#else
// For non-ARM, increase encoding complexity (i.e., use lower speed setting)
// if resolution is below CIF. Otherwise, keep the default/user setting
// (|cpu_speed_default_|) set on InitEncode via codecSpecific.VP8.complexity.
if (width * height < 352 * 288)
return (cpu_speed_default_ < -4) ? -4 : cpu_speed_default_;
else
return cpu_speed_default_;
#endif
}
int VP8EncoderImpl::NumberOfThreads(int width, int height, int cpus) {
if (width * height >= 1920 * 1080 && cpus > 8) {
return 8; // 8 threads for 1080p on high perf machines.
} else if (width * height > 1280 * 960 && cpus >= 6) {
// 3 threads for 1080p.
return 3;
} else if (width * height > 640 * 480 && cpus >= 3) {
// 2 threads for qHD/HD.
return 2;
} else {
// 1 thread for VGA or less.
return 1;
}
}
int VP8EncoderImpl::InitAndSetControlSettings() {
vpx_codec_flags_t flags = 0;
flags |= VPX_CODEC_USE_OUTPUT_PARTITION;
if (encoders_.size() > 1) {
int error = vpx_codec_enc_init_multi(&encoders_[0],
vpx_codec_vp8_cx(),
&configurations_[0],
encoders_.size(),
flags,
&downsampling_factors_[0]);
if (error) {
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
}
} else {
if (vpx_codec_enc_init(&encoders_[0],
vpx_codec_vp8_cx(),
&configurations_[0],
flags)) {
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
}
}
// Enable denoising for the highest resolution stream, and for
// the second highest resolution if we are doing more than 2
// spatial layers/streams.
// TODO(holmer): Investigate possibility of adding a libvpx API
// for getting the denoised frame from the encoder and using that
// when encoding lower resolution streams. Would it work with the
// multi-res encoding feature?
denoiserState denoiser_state = kDenoiserOnYOnly;
#if defined(WEBRTC_ARCH_ARM) || defined(WEBRTC_ARCH_ARM64)
denoiser_state = kDenoiserOnYOnly;
#else
denoiser_state = kDenoiserOnAdaptive;
#endif
vpx_codec_control(&encoders_[0], VP8E_SET_NOISE_SENSITIVITY,
codec_.codecSpecific.VP8.denoisingOn ?
denoiser_state : kDenoiserOff);
if (encoders_.size() > 2) {
vpx_codec_control(&encoders_[1], VP8E_SET_NOISE_SENSITIVITY,
codec_.codecSpecific.VP8.denoisingOn ?
denoiser_state : kDenoiserOff);
}
for (size_t i = 0; i < encoders_.size(); ++i) {
// Allow more screen content to be detected as static.
vpx_codec_control(&(encoders_[i]), VP8E_SET_STATIC_THRESHOLD,
codec_.mode == kScreensharing ? 300 : 1);
vpx_codec_control(&(encoders_[i]), VP8E_SET_CPUUSED, cpu_speed_[i]);
vpx_codec_control(&(encoders_[i]), VP8E_SET_TOKEN_PARTITIONS,
static_cast<vp8e_token_partitions>(token_partitions_));
vpx_codec_control(&(encoders_[i]), VP8E_SET_MAX_INTRA_BITRATE_PCT,
rc_max_intra_target_);
// VP8E_SET_SCREEN_CONTENT_MODE 2 = screen content with more aggressive
// rate control (drop frames on large target bitrate overshoot)
vpx_codec_control(&(encoders_[i]), VP8E_SET_SCREEN_CONTENT_MODE,
codec_.mode == kScreensharing ? 2 : 0);
}
inited_ = true;
return WEBRTC_VIDEO_CODEC_OK;
}
uint32_t VP8EncoderImpl::MaxIntraTarget(uint32_t optimalBuffersize) {
// Set max to the optimal buffer level (normalized by target BR),
// and scaled by a scalePar.
// Max target size = scalePar * optimalBufferSize * targetBR[Kbps].
// This values is presented in percentage of perFrameBw:
// perFrameBw = targetBR[Kbps] * 1000 / frameRate.
// The target in % is as follows:
float scalePar = 0.5;
uint32_t targetPct = optimalBuffersize * scalePar * codec_.maxFramerate / 10;
// Don't go below 3 times the per frame bandwidth.
const uint32_t minIntraTh = 300;
return (targetPct < minIntraTh) ? minIntraTh: targetPct;
}
int VP8EncoderImpl::Encode(const VideoFrame& frame,
const CodecSpecificInfo* codec_specific_info,
const std::vector<FrameType>* frame_types) {
TRACE_EVENT1("webrtc", "VP8::Encode", "timestamp", frame.timestamp());
if (!inited_)
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
if (frame.IsZeroSize())
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
if (encoded_complete_callback_ == NULL)
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
if (quality_scaler_enabled_)
quality_scaler_.OnEncodeFrame(frame);
const VideoFrame& input_image =
quality_scaler_enabled_ ? quality_scaler_.GetScaledFrame(frame) : frame;
if (quality_scaler_enabled_ && (input_image.width() != codec_.width ||
input_image.height() != codec_.height)) {
int ret = UpdateCodecFrameSize(input_image);
if (ret < 0)
return ret;
}
// Since we are extracting raw pointers from |input_image| to
// |raw_images_[0]|, the resolution of these frames must match. Note that
// |input_image| might be scaled from |frame|. In that case, the resolution of
// |raw_images_[0]| should have been updated in UpdateCodecFrameSize.
RTC_DCHECK_EQ(input_image.width(), static_cast<int>(raw_images_[0].d_w));
RTC_DCHECK_EQ(input_image.height(), static_cast<int>(raw_images_[0].d_h));
// Image in vpx_image_t format.
// Input image is const. VP8's raw image is not defined as const.
raw_images_[0].planes[VPX_PLANE_Y] =
const_cast<uint8_t*>(input_image.buffer(kYPlane));
raw_images_[0].planes[VPX_PLANE_U] =
const_cast<uint8_t*>(input_image.buffer(kUPlane));
raw_images_[0].planes[VPX_PLANE_V] =
const_cast<uint8_t*>(input_image.buffer(kVPlane));
raw_images_[0].stride[VPX_PLANE_Y] = input_image.stride(kYPlane);
raw_images_[0].stride[VPX_PLANE_U] = input_image.stride(kUPlane);
raw_images_[0].stride[VPX_PLANE_V] = input_image.stride(kVPlane);
for (size_t i = 1; i < encoders_.size(); ++i) {
// Scale the image down a number of times by downsampling factor
libyuv::I420Scale(
raw_images_[i-1].planes[VPX_PLANE_Y],
raw_images_[i-1].stride[VPX_PLANE_Y],
raw_images_[i-1].planes[VPX_PLANE_U],
raw_images_[i-1].stride[VPX_PLANE_U],
raw_images_[i-1].planes[VPX_PLANE_V],
raw_images_[i-1].stride[VPX_PLANE_V],
raw_images_[i-1].d_w, raw_images_[i-1].d_h,
raw_images_[i].planes[VPX_PLANE_Y], raw_images_[i].stride[VPX_PLANE_Y],
raw_images_[i].planes[VPX_PLANE_U], raw_images_[i].stride[VPX_PLANE_U],
raw_images_[i].planes[VPX_PLANE_V], raw_images_[i].stride[VPX_PLANE_V],
raw_images_[i].d_w, raw_images_[i].d_h, libyuv::kFilterBilinear);
}
vpx_enc_frame_flags_t flags[kMaxSimulcastStreams];
for (size_t i = 0; i < encoders_.size(); ++i) {
int ret = temporal_layers_[i]->EncodeFlags(input_image.timestamp());
if (ret < 0) {
// Drop this frame.
return WEBRTC_VIDEO_CODEC_OK;
}
flags[i] = ret;
}
bool send_key_frame = false;
for (size_t i = 0; i < key_frame_request_.size() && i < send_stream_.size();
++i) {
if (key_frame_request_[i] && send_stream_[i]) {
send_key_frame = true;
break;
}
}
if (!send_key_frame && frame_types) {
for (size_t i = 0; i < frame_types->size() && i < send_stream_.size();
++i) {
if ((*frame_types)[i] == kKeyFrame && send_stream_[i]) {
send_key_frame = true;
break;
}
}
}
// The flag modification below (due to forced key frame, RPS, etc.,) for now
// will be the same for all encoders/spatial layers.
// TODO(marpan/holmer): Allow for key frame request to be set per encoder.
bool only_predict_from_key_frame = false;
if (send_key_frame) {
// Adapt the size of the key frame when in screenshare with 1 temporal
// layer.
if (encoders_.size() == 1 && codec_.mode == kScreensharing
&& codec_.codecSpecific.VP8.numberOfTemporalLayers <= 1) {
const uint32_t forceKeyFrameIntraTh = 100;
vpx_codec_control(&(encoders_[0]), VP8E_SET_MAX_INTRA_BITRATE_PCT,
forceKeyFrameIntraTh);
}
// Key frame request from caller.
// Will update both golden and alt-ref.
for (size_t i = 0; i < encoders_.size(); ++i) {
flags[i] = VPX_EFLAG_FORCE_KF;
}
std::fill(key_frame_request_.begin(), key_frame_request_.end(), false);
} else if (codec_specific_info &&
codec_specific_info->codecType == kVideoCodecVP8) {
if (feedback_mode_) {
// Handle RPSI and SLI messages and set up the appropriate encode flags.
bool sendRefresh = false;
if (codec_specific_info->codecSpecific.VP8.hasReceivedRPSI) {
rps_.ReceivedRPSI(
codec_specific_info->codecSpecific.VP8.pictureIdRPSI);
}
if (codec_specific_info->codecSpecific.VP8.hasReceivedSLI) {
sendRefresh = rps_.ReceivedSLI(input_image.timestamp());
}
for (size_t i = 0; i < encoders_.size(); ++i) {
flags[i] = rps_.EncodeFlags(picture_id_[i], sendRefresh,
input_image.timestamp());
}
} else {
if (codec_specific_info->codecSpecific.VP8.hasReceivedRPSI) {
// Is this our last key frame? If not ignore.
// |picture_id_| is defined per spatial stream/layer, so check that
// |RPSI| matches the last key frame from any of the spatial streams.
// If so, then all spatial streams for this encoding will predict from
// its long-term reference (last key frame).
int RPSI = codec_specific_info->codecSpecific.VP8.pictureIdRPSI;
for (size_t i = 0; i < encoders_.size(); ++i) {
if (last_key_frame_picture_id_[i] == RPSI) {
// Request for a long term reference frame.
// Note 1: overwrites any temporal settings.
// Note 2: VP8_EFLAG_NO_UPD_ENTROPY is not needed as that flag is
// set by error_resilient mode.
for (size_t j = 0; j < encoders_.size(); ++j) {
flags[j] = VP8_EFLAG_NO_UPD_ARF;
flags[j] |= VP8_EFLAG_NO_REF_GF;
flags[j] |= VP8_EFLAG_NO_REF_LAST;
}
only_predict_from_key_frame = true;
break;
}
}
}
}
}
// Set the encoder frame flags and temporal layer_id for each spatial stream.
// Note that |temporal_layers_| are defined starting from lowest resolution at
// position 0 to highest resolution at position |encoders_.size() - 1|,
// whereas |encoder_| is from highest to lowest resolution.
size_t stream_idx = encoders_.size() - 1;
for (size_t i = 0; i < encoders_.size(); ++i, --stream_idx) {
// Allow the layers adapter to temporarily modify the configuration. This
// change isn't stored in configurations_ so change will be discarded at
// the next update.
vpx_codec_enc_cfg_t temp_config;
memcpy(&temp_config, &configurations_[i], sizeof(vpx_codec_enc_cfg_t));
if (temporal_layers_[stream_idx]->UpdateConfiguration(&temp_config)) {
if (vpx_codec_enc_config_set(&encoders_[i], &temp_config))
return WEBRTC_VIDEO_CODEC_ERROR;
}
vpx_codec_control(&encoders_[i], VP8E_SET_FRAME_FLAGS, flags[stream_idx]);
vpx_codec_control(&encoders_[i],
VP8E_SET_TEMPORAL_LAYER_ID,
temporal_layers_[stream_idx]->CurrentLayerId());
}
// TODO(holmer): Ideally the duration should be the timestamp diff of this
// frame and the next frame to be encoded, which we don't have. Instead we
// would like to use the duration of the previous frame. Unfortunately the
// rate control seems to be off with that setup. Using the average input
// frame rate to calculate an average duration for now.
assert(codec_.maxFramerate > 0);
uint32_t duration = 90000 / codec_.maxFramerate;
// Note we must pass 0 for |flags| field in encode call below since they are
// set above in |vpx_codec_control| function for each encoder/spatial layer.
int error = vpx_codec_encode(&encoders_[0], &raw_images_[0], timestamp_,
duration, 0, VPX_DL_REALTIME);
// Reset specific intra frame thresholds, following the key frame.
if (send_key_frame) {
vpx_codec_control(&(encoders_[0]), VP8E_SET_MAX_INTRA_BITRATE_PCT,
rc_max_intra_target_);
}
if (error)
return WEBRTC_VIDEO_CODEC_ERROR;
timestamp_ += duration;
return GetEncodedPartitions(input_image, only_predict_from_key_frame);
}
// TODO(pbos): Make sure this works for properly for >1 encoders.
int VP8EncoderImpl::UpdateCodecFrameSize(const VideoFrame& input_image) {
codec_.width = input_image.width();
codec_.height = input_image.height();
if (codec_.numberOfSimulcastStreams <= 1) {
// For now scaling is only used for single-layer streams.
codec_.simulcastStream[0].width = input_image.width();
codec_.simulcastStream[0].height = input_image.height();
}
// Update the cpu_speed setting for resolution change.
vpx_codec_control(&(encoders_[0]),
VP8E_SET_CPUUSED,
SetCpuSpeed(codec_.width, codec_.height));
raw_images_[0].w = codec_.width;
raw_images_[0].h = codec_.height;
raw_images_[0].d_w = codec_.width;
raw_images_[0].d_h = codec_.height;
vpx_img_set_rect(&raw_images_[0], 0, 0, codec_.width, codec_.height);
// Update encoder context for new frame size.
// Change of frame size will automatically trigger a key frame.
configurations_[0].g_w = codec_.width;
configurations_[0].g_h = codec_.height;
if (vpx_codec_enc_config_set(&encoders_[0], &configurations_[0])) {
return WEBRTC_VIDEO_CODEC_ERROR;
}
return WEBRTC_VIDEO_CODEC_OK;
}
void VP8EncoderImpl::PopulateCodecSpecific(
CodecSpecificInfo* codec_specific,
const vpx_codec_cx_pkt_t& pkt,
int stream_idx,
uint32_t timestamp,
bool only_predicting_from_key_frame) {
assert(codec_specific != NULL);
codec_specific->codecType = kVideoCodecVP8;
CodecSpecificInfoVP8* vp8Info = &(codec_specific->codecSpecific.VP8);
vp8Info->pictureId = picture_id_[stream_idx];
if (pkt.data.frame.flags & VPX_FRAME_IS_KEY) {
last_key_frame_picture_id_[stream_idx] = picture_id_[stream_idx];
}
vp8Info->simulcastIdx = stream_idx;
vp8Info->keyIdx = kNoKeyIdx; // TODO(hlundin) populate this
vp8Info->nonReference = (pkt.data.frame.flags & VPX_FRAME_IS_DROPPABLE) ?
true : false;
bool base_layer_sync_point = (pkt.data.frame.flags & VPX_FRAME_IS_KEY) ||
only_predicting_from_key_frame;
temporal_layers_[stream_idx]->PopulateCodecSpecific(base_layer_sync_point,
vp8Info,
timestamp);
// Prepare next.
picture_id_[stream_idx] = (picture_id_[stream_idx] + 1) & 0x7FFF;
}
int VP8EncoderImpl::GetEncodedPartitions(const VideoFrame& input_image,
bool only_predicting_from_key_frame) {
int bw_resolutions_disabled =
(encoders_.size() > 1) ? NumStreamsDisabled(send_stream_) : -1;
int stream_idx = static_cast<int>(encoders_.size()) - 1;
int result = WEBRTC_VIDEO_CODEC_OK;
for (size_t encoder_idx = 0; encoder_idx < encoders_.size();
++encoder_idx, --stream_idx) {
vpx_codec_iter_t iter = NULL;
int part_idx = 0;
encoded_images_[encoder_idx]._length = 0;
encoded_images_[encoder_idx]._frameType = kDeltaFrame;
RTPFragmentationHeader frag_info;
// token_partitions_ is number of bits used.
frag_info.VerifyAndAllocateFragmentationHeader((1 << token_partitions_)
+ 1);
CodecSpecificInfo codec_specific;
const vpx_codec_cx_pkt_t *pkt = NULL;
while ((pkt = vpx_codec_get_cx_data(&encoders_[encoder_idx],
&iter)) != NULL) {
switch (pkt->kind) {
case VPX_CODEC_CX_FRAME_PKT: {
uint32_t length = encoded_images_[encoder_idx]._length;
memcpy(&encoded_images_[encoder_idx]._buffer[length],
pkt->data.frame.buf,
pkt->data.frame.sz);
frag_info.fragmentationOffset[part_idx] = length;
frag_info.fragmentationLength[part_idx] = pkt->data.frame.sz;
frag_info.fragmentationPlType[part_idx] = 0; // not known here
frag_info.fragmentationTimeDiff[part_idx] = 0;
encoded_images_[encoder_idx]._length += pkt->data.frame.sz;
assert(length <= encoded_images_[encoder_idx]._size);
++part_idx;
break;
}
default:
break;
}
// End of frame
if ((pkt->data.frame.flags & VPX_FRAME_IS_FRAGMENT) == 0) {
// check if encoded frame is a key frame
if (pkt->data.frame.flags & VPX_FRAME_IS_KEY) {
encoded_images_[encoder_idx]._frameType = kKeyFrame;
rps_.EncodedKeyFrame(picture_id_[stream_idx]);
}
PopulateCodecSpecific(&codec_specific, *pkt, stream_idx,
input_image.timestamp(),
only_predicting_from_key_frame);
break;
}
}
encoded_images_[encoder_idx]._timeStamp = input_image.timestamp();
encoded_images_[encoder_idx].capture_time_ms_ =
input_image.render_time_ms();
int qp = -1;
vpx_codec_control(&encoders_[encoder_idx], VP8E_GET_LAST_QUANTIZER_64, &qp);
temporal_layers_[stream_idx]->FrameEncoded(
encoded_images_[encoder_idx]._length,
encoded_images_[encoder_idx]._timeStamp, qp);
if (send_stream_[stream_idx]) {
if (encoded_images_[encoder_idx]._length > 0) {
TRACE_COUNTER_ID1("webrtc", "EncodedFrameSize", encoder_idx,
encoded_images_[encoder_idx]._length);
encoded_images_[encoder_idx]._encodedHeight =
codec_.simulcastStream[stream_idx].height;
encoded_images_[encoder_idx]._encodedWidth =
codec_.simulcastStream[stream_idx].width;
encoded_images_[encoder_idx]
.adapt_reason_.quality_resolution_downscales =
quality_scaler_enabled_ ? quality_scaler_.downscale_shift() : -1;
// Report once per frame (lowest stream always sent).
encoded_images_[encoder_idx].adapt_reason_.bw_resolutions_disabled =
(stream_idx == 0) ? bw_resolutions_disabled : -1;
encoded_complete_callback_->Encoded(encoded_images_[encoder_idx],
&codec_specific, &frag_info);
} else if (codec_.mode == kScreensharing) {
result = WEBRTC_VIDEO_CODEC_TARGET_BITRATE_OVERSHOOT;
}
}
}
if (encoders_.size() == 1 && send_stream_[0]) {
if (encoded_images_[0]._length > 0) {
int qp;
vpx_codec_control(&encoders_[0], VP8E_GET_LAST_QUANTIZER_64, &qp);
quality_scaler_.ReportQP(qp);
} else {
quality_scaler_.ReportDroppedFrame();
}
}
return result;
}
int VP8EncoderImpl::SetChannelParameters(uint32_t packetLoss, int64_t rtt) {
rps_.SetRtt(rtt);
return WEBRTC_VIDEO_CODEC_OK;
}
int VP8EncoderImpl::RegisterEncodeCompleteCallback(
EncodedImageCallback* callback) {
encoded_complete_callback_ = callback;
return WEBRTC_VIDEO_CODEC_OK;
}
VP8DecoderImpl::VP8DecoderImpl()
: decode_complete_callback_(NULL),
inited_(false),
feedback_mode_(false),
decoder_(NULL),
last_keyframe_(),
image_format_(VPX_IMG_FMT_NONE),
ref_frame_(NULL),
propagation_cnt_(-1),
last_frame_width_(0),
last_frame_height_(0),
key_frame_required_(true) {
}
VP8DecoderImpl::~VP8DecoderImpl() {
inited_ = true; // in order to do the actual release
Release();
}
int VP8DecoderImpl::Reset() {
if (!inited_) {
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
}
InitDecode(&codec_, 1);
propagation_cnt_ = -1;
return WEBRTC_VIDEO_CODEC_OK;
}
int VP8DecoderImpl::InitDecode(const VideoCodec* inst,
int number_of_cores) {
int ret_val = Release();
if (ret_val < 0) {
return ret_val;
}
if (decoder_ == NULL) {
decoder_ = new vpx_codec_ctx_t;
}
if (inst && inst->codecType == kVideoCodecVP8) {
feedback_mode_ = inst->codecSpecific.VP8.feedbackModeOn;
}
vpx_codec_dec_cfg_t cfg;
// Setting number of threads to a constant value (1)
cfg.threads = 1;
cfg.h = cfg.w = 0; // set after decode
vpx_codec_flags_t flags = 0;
#if !defined(WEBRTC_ARCH_ARM) && !defined(WEBRTC_ARCH_ARM64)
flags = VPX_CODEC_USE_POSTPROC;
#ifdef INDEPENDENT_PARTITIONS
flags |= VPX_CODEC_USE_INPUT_PARTITION;
#endif
#endif
if (vpx_codec_dec_init(decoder_, vpx_codec_vp8_dx(), &cfg, flags)) {
return WEBRTC_VIDEO_CODEC_MEMORY;
}
// Save VideoCodec instance for later; mainly for duplicating the decoder.
if (&codec_ != inst)
codec_ = *inst;
propagation_cnt_ = -1;
inited_ = true;
// Always start with a complete key frame.
key_frame_required_ = true;
return WEBRTC_VIDEO_CODEC_OK;
}
int VP8DecoderImpl::Decode(const EncodedImage& input_image,
bool missing_frames,
const RTPFragmentationHeader* fragmentation,
const CodecSpecificInfo* codec_specific_info,
int64_t /*render_time_ms*/) {
if (!inited_) {
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
}
if (decode_complete_callback_ == NULL) {
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
}
if (input_image._buffer == NULL && input_image._length > 0) {
// Reset to avoid requesting key frames too often.
if (propagation_cnt_ > 0)
propagation_cnt_ = 0;
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
#ifdef INDEPENDENT_PARTITIONS
if (fragmentation == NULL) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
#endif
#if !defined(WEBRTC_ARCH_ARM) && !defined(WEBRTC_ARCH_ARM64)
vp8_postproc_cfg_t ppcfg;
// MFQE enabled to reduce key frame popping.
ppcfg.post_proc_flag = VP8_MFQE | VP8_DEBLOCK;
// For VGA resolutions and lower, enable the demacroblocker postproc.
if (last_frame_width_ * last_frame_height_ <= 640 * 360) {
ppcfg.post_proc_flag |= VP8_DEMACROBLOCK;
}
// Strength of deblocking filter. Valid range:[0,16]
ppcfg.deblocking_level = 3;
vpx_codec_control(decoder_, VP8_SET_POSTPROC, &ppcfg);
#endif
// Always start with a complete key frame.
if (key_frame_required_) {
if (input_image._frameType != kKeyFrame)
return WEBRTC_VIDEO_CODEC_ERROR;
// We have a key frame - is it complete?
if (input_image._completeFrame) {
key_frame_required_ = false;
} else {
return WEBRTC_VIDEO_CODEC_ERROR;
}
}
// Restrict error propagation using key frame requests. Disabled when
// the feedback mode is enabled (RPS).
// Reset on a key frame refresh.
if (!feedback_mode_) {
if (input_image._frameType == kKeyFrame && input_image._completeFrame) {
propagation_cnt_ = -1;
// Start count on first loss.
} else if ((!input_image._completeFrame || missing_frames) &&
propagation_cnt_ == -1) {
propagation_cnt_ = 0;
}
if (propagation_cnt_ >= 0) {
propagation_cnt_++;
}
}
vpx_codec_iter_t iter = NULL;
vpx_image_t* img;
int ret;
// Check for missing frames.
if (missing_frames) {
// Call decoder with zero data length to signal missing frames.
if (vpx_codec_decode(decoder_, NULL, 0, 0, VPX_DL_REALTIME)) {
// Reset to avoid requesting key frames too often.
if (propagation_cnt_ > 0)
propagation_cnt_ = 0;
return WEBRTC_VIDEO_CODEC_ERROR;
}
img = vpx_codec_get_frame(decoder_, &iter);
iter = NULL;
}
#ifdef INDEPENDENT_PARTITIONS
if (DecodePartitions(inputImage, fragmentation)) {
// Reset to avoid requesting key frames too often.
if (propagation_cnt_ > 0) {
propagation_cnt_ = 0;
}
return WEBRTC_VIDEO_CODEC_ERROR;
}
#else
uint8_t* buffer = input_image._buffer;
if (input_image._length == 0) {
buffer = NULL; // Triggers full frame concealment.
}
if (vpx_codec_decode(decoder_, buffer, input_image._length, 0,
VPX_DL_REALTIME)) {
// Reset to avoid requesting key frames too often.
if (propagation_cnt_ > 0) {
propagation_cnt_ = 0;
}
return WEBRTC_VIDEO_CODEC_ERROR;
}
#endif
// Store encoded frame if key frame. (Used in Copy method.)
if (input_image._frameType == kKeyFrame && input_image._buffer != NULL) {
const uint32_t bytes_to_copy = input_image._length;
if (last_keyframe_._size < bytes_to_copy) {
delete [] last_keyframe_._buffer;
last_keyframe_._buffer = NULL;
last_keyframe_._size = 0;
}
uint8_t* temp_buffer = last_keyframe_._buffer; // Save buffer ptr.
uint32_t temp_size = last_keyframe_._size; // Save size.
last_keyframe_ = input_image; // Shallow copy.
last_keyframe_._buffer = temp_buffer; // Restore buffer ptr.
last_keyframe_._size = temp_size; // Restore buffer size.
if (!last_keyframe_._buffer) {
// Allocate memory.
last_keyframe_._size = bytes_to_copy;
last_keyframe_._buffer = new uint8_t[last_keyframe_._size];
}
// Copy encoded frame.
memcpy(last_keyframe_._buffer, input_image._buffer, bytes_to_copy);
last_keyframe_._length = bytes_to_copy;
}
img = vpx_codec_get_frame(decoder_, &iter);
ret = ReturnFrame(img, input_image._timeStamp, input_image.ntp_time_ms_);
if (ret != 0) {
// Reset to avoid requesting key frames too often.
if (ret < 0 && propagation_cnt_ > 0)
propagation_cnt_ = 0;
return ret;
}
if (feedback_mode_) {
// Whenever we receive an incomplete key frame all reference buffers will
// be corrupt. If that happens we must request new key frames until we
// decode a complete key frame.
if (input_image._frameType == kKeyFrame && !input_image._completeFrame)
return WEBRTC_VIDEO_CODEC_ERROR;
// Check for reference updates and last reference buffer corruption and
// signal successful reference propagation or frame corruption to the
// encoder.
int reference_updates = 0;
if (vpx_codec_control(decoder_, VP8D_GET_LAST_REF_UPDATES,
&reference_updates)) {
// Reset to avoid requesting key frames too often.
if (propagation_cnt_ > 0) {
propagation_cnt_ = 0;
}
return WEBRTC_VIDEO_CODEC_ERROR;
}
int corrupted = 0;
if (vpx_codec_control(decoder_, VP8D_GET_FRAME_CORRUPTED, &corrupted)) {
// Reset to avoid requesting key frames too often.
if (propagation_cnt_ > 0)
propagation_cnt_ = 0;
return WEBRTC_VIDEO_CODEC_ERROR;
}
int16_t picture_id = -1;
if (codec_specific_info) {
picture_id = codec_specific_info->codecSpecific.VP8.pictureId;
}
if (picture_id > -1) {
if (((reference_updates & VP8_GOLD_FRAME) ||
(reference_updates & VP8_ALTR_FRAME)) && !corrupted) {
decode_complete_callback_->ReceivedDecodedReferenceFrame(picture_id);
}
decode_complete_callback_->ReceivedDecodedFrame(picture_id);
}
if (corrupted) {
// we can decode but with artifacts
return WEBRTC_VIDEO_CODEC_REQUEST_SLI;
}
}
// Check Vs. threshold
if (propagation_cnt_ > kVp8ErrorPropagationTh) {
// Reset to avoid requesting key frames too often.
propagation_cnt_ = 0;
return WEBRTC_VIDEO_CODEC_ERROR;
}
return WEBRTC_VIDEO_CODEC_OK;
}
int VP8DecoderImpl::DecodePartitions(
const EncodedImage& input_image,
const RTPFragmentationHeader* fragmentation) {
for (int i = 0; i < fragmentation->fragmentationVectorSize; ++i) {
const uint8_t* partition = input_image._buffer +
fragmentation->fragmentationOffset[i];
const uint32_t partition_length =
fragmentation->fragmentationLength[i];
if (vpx_codec_decode(decoder_,
partition,
partition_length,
0,
VPX_DL_REALTIME)) {
return WEBRTC_VIDEO_CODEC_ERROR;
}
}
// Signal end of frame data. If there was no frame data this will trigger
// a full frame concealment.
if (vpx_codec_decode(decoder_, NULL, 0, 0, VPX_DL_REALTIME))
return WEBRTC_VIDEO_CODEC_ERROR;
return WEBRTC_VIDEO_CODEC_OK;
}
int VP8DecoderImpl::ReturnFrame(const vpx_image_t* img,
uint32_t timestamp,
int64_t ntp_time_ms) {
if (img == NULL) {
// Decoder OK and NULL image => No show frame
return WEBRTC_VIDEO_CODEC_NO_OUTPUT;
}
last_frame_width_ = img->d_w;
last_frame_height_ = img->d_h;
// Allocate memory for decoded image.
VideoFrame decoded_image(buffer_pool_.CreateBuffer(img->d_w, img->d_h),
timestamp, 0, kVideoRotation_0);
libyuv::I420Copy(
img->planes[VPX_PLANE_Y], img->stride[VPX_PLANE_Y],
img->planes[VPX_PLANE_U], img->stride[VPX_PLANE_U],
img->planes[VPX_PLANE_V], img->stride[VPX_PLANE_V],
decoded_image.buffer(kYPlane), decoded_image.stride(kYPlane),
decoded_image.buffer(kUPlane), decoded_image.stride(kUPlane),
decoded_image.buffer(kVPlane), decoded_image.stride(kVPlane),
img->d_w, img->d_h);
decoded_image.set_ntp_time_ms(ntp_time_ms);
int ret = decode_complete_callback_->Decoded(decoded_image);
if (ret != 0)
return ret;
// Remember image format for later
image_format_ = img->fmt;
return WEBRTC_VIDEO_CODEC_OK;
}
int VP8DecoderImpl::RegisterDecodeCompleteCallback(
DecodedImageCallback* callback) {
decode_complete_callback_ = callback;
return WEBRTC_VIDEO_CODEC_OK;
}
int VP8DecoderImpl::Release() {
if (last_keyframe_._buffer != NULL) {
delete [] last_keyframe_._buffer;
last_keyframe_._buffer = NULL;
}
if (decoder_ != NULL) {
if (vpx_codec_destroy(decoder_)) {
return WEBRTC_VIDEO_CODEC_MEMORY;
}
delete decoder_;
decoder_ = NULL;
}
if (ref_frame_ != NULL) {
vpx_img_free(&ref_frame_->img);
delete ref_frame_;
ref_frame_ = NULL;
}
buffer_pool_.Release();
inited_ = false;
return WEBRTC_VIDEO_CODEC_OK;
}
int VP8DecoderImpl::CopyReference(VP8DecoderImpl* copy) {
// The type of frame to copy should be set in ref_frame_->frame_type
// before the call to this function.
if (vpx_codec_control(decoder_, VP8_COPY_REFERENCE, ref_frame_)
!= VPX_CODEC_OK) {
return -1;
}
if (vpx_codec_control(copy->decoder_, VP8_SET_REFERENCE, ref_frame_)
!= VPX_CODEC_OK) {
return -1;
}
return 0;
}
} // namespace webrtc