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webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
Ilya Nikolaevskiy c22a3a6a7d Refactor VP8 encoder creation logic 
Now decision between using SimulcastEncoderAdapter and using VP8 encoder
is postponed before codec is initialized for VP8 internal codecs. This is done
be new VP8EncoderProxy class. New error code for codec initialization is used
to signal that simulcast parameters are not supported.

Bug: webrtc:7925
Change-Id: I3a82c21bf5dfaaa7fa25350986830523f02c39d8
Reviewed-on: https://webrtc-review.googlesource.com/13980
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20419}
2017-10-25 09:30:07 +00:00

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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 "modules/video_coding/codecs/vp8/vp8_impl.h"
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <algorithm>
#include <string>
// NOTE(ajm): Path provided by gyp.
#include "libyuv/convert.h" // NOLINT
#include "libyuv/scale.h" // NOLINT
#include "common_types.h" // NOLINT(build/include)
#include "common_video/libyuv/include/webrtc_libyuv.h"
#include "modules/include/module_common_types.h"
#include "modules/video_coding/codecs/vp8/include/vp8_common_types.h"
#include "modules/video_coding/codecs/vp8/screenshare_layers.h"
#include "modules/video_coding/codecs/vp8/simulcast_rate_allocator.h"
#include "modules/video_coding/codecs/vp8/temporal_layers.h"
#include "modules/video_coding/include/video_codec_interface.h"
#include "rtc_base/checks.h"
#include "rtc_base/numerics/exp_filter.h"
#include "rtc_base/random.h"
#include "rtc_base/timeutils.h"
#include "rtc_base/trace_event.h"
#include "system_wrappers/include/clock.h"
#include "system_wrappers/include/field_trial.h"
#include "system_wrappers/include/metrics.h"
namespace webrtc {
namespace {
const char kVp8PostProcArmFieldTrial[] = "WebRTC-VP8-Postproc-Config-Arm";
const char kVp8GfBoostFieldTrial[] = "WebRTC-VP8-GfBoost";
const char kVp8ForceFallbackEncoderFieldTrial[] =
"WebRTC-VP8-Forced-Fallback-Encoder";
const int kTokenPartitions = VP8_ONE_TOKENPARTITION;
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;
}
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;
}
}
for (int i = 1; i < num_streams; ++i) {
if (codec.simulcastStream[i].width !=
codec.simulcastStream[i - 1].width * 2) {
return false;
}
}
return true;
}
bool ValidSimulcastTemporalLayers(const VideoCodec& codec, int num_streams) {
for (int i = 0; i < num_streams - 1; ++i) {
if (codec.simulcastStream[i].numberOfTemporalLayers !=
codec.simulcastStream[i + 1].numberOfTemporalLayers)
return false;
}
return true;
}
int NumStreamsDisabled(const std::vector<bool>& streams) {
int num_disabled = 0;
for (bool stream : streams) {
if (!stream)
++num_disabled;
}
return num_disabled;
}
rtc::Optional<int> GetForcedFallbackMinPixelsFromFieldTrialGroup() {
if (!webrtc::field_trial::IsEnabled(kVp8ForceFallbackEncoderFieldTrial))
return rtc::Optional<int>();
std::string group =
webrtc::field_trial::FindFullName(kVp8ForceFallbackEncoderFieldTrial);
if (group.empty())
return rtc::Optional<int>();
int low_kbps;
int high_kbps;
int min_low_ms;
int min_pixels;
if (sscanf(group.c_str(), "Enabled-%d,%d,%d,%d", &low_kbps, &high_kbps,
&min_low_ms, &min_pixels) != 4) {
return rtc::Optional<int>();
}
if (min_low_ms <= 0 || min_pixels <= 0 || low_kbps <= 0 ||
high_kbps <= low_kbps) {
return rtc::Optional<int>();
}
return rtc::Optional<int>(min_pixels);
}
bool GetGfBoostPercentageFromFieldTrialGroup(int* boost_percentage) {
std::string group = webrtc::field_trial::FindFullName(kVp8GfBoostFieldTrial);
if (group.empty())
return false;
if (sscanf(group.c_str(), "Enabled-%d", boost_percentage) != 1)
return false;
if (*boost_percentage < 0 || *boost_percentage > 100)
return false;
return true;
}
void GetPostProcParamsFromFieldTrialGroup(
VP8DecoderImpl::DeblockParams* deblock_params) {
std::string group =
webrtc::field_trial::FindFullName(kVp8PostProcArmFieldTrial);
if (group.empty())
return;
VP8DecoderImpl::DeblockParams params;
if (sscanf(group.c_str(), "Enabled-%d,%d,%d", &params.max_level,
&params.min_qp, &params.degrade_qp) != 3)
return;
if (params.max_level < 0 || params.max_level > 16)
return;
if (params.min_qp < 0 || params.degrade_qp <= params.min_qp)
return;
*deblock_params = params;
}
} // namespace
VP8Encoder* VP8Encoder::Create() {
return new VP8EncoderImpl();
}
VP8Decoder* VP8Decoder::Create() {
return new VP8DecoderImpl();
}
vpx_enc_frame_flags_t VP8EncoderImpl::EncodeFlags(
const TemporalLayers::FrameConfig& references) {
RTC_DCHECK(!references.drop_frame);
vpx_enc_frame_flags_t flags = 0;
if ((references.last_buffer_flags & TemporalLayers::kReference) == 0)
flags |= VP8_EFLAG_NO_REF_LAST;
if ((references.last_buffer_flags & TemporalLayers::kUpdate) == 0)
flags |= VP8_EFLAG_NO_UPD_LAST;
if ((references.golden_buffer_flags & TemporalLayers::kReference) == 0)
flags |= VP8_EFLAG_NO_REF_GF;
if ((references.golden_buffer_flags & TemporalLayers::kUpdate) == 0)
flags |= VP8_EFLAG_NO_UPD_GF;
if ((references.arf_buffer_flags & TemporalLayers::kReference) == 0)
flags |= VP8_EFLAG_NO_REF_ARF;
if ((references.arf_buffer_flags & TemporalLayers::kUpdate) == 0)
flags |= VP8_EFLAG_NO_UPD_ARF;
if (references.freeze_entropy)
flags |= VP8_EFLAG_NO_UPD_ENTROPY;
return flags;
}
VP8EncoderImpl::VP8EncoderImpl()
: use_gf_boost_(webrtc::field_trial::IsEnabled(kVp8GfBoostFieldTrial)),
min_pixels_per_frame_(GetForcedFallbackMinPixelsFromFieldTrialGroup()),
encoded_complete_callback_(nullptr),
inited_(false),
timestamp_(0),
qp_max_(56), // Setting for max quantizer.
cpu_speed_default_(-6),
number_of_cores_(0),
rc_max_intra_target_(0),
key_frame_request_(kMaxSimulcastStreams, false) {
Random random(rtc::TimeMicros());
picture_id_.reserve(kMaxSimulcastStreams);
for (int i = 0; i < kMaxSimulcastStreams; ++i) {
picture_id_.push_back(random.Rand<uint16_t>() & 0x7FFF);
tl0_pic_idx_.push_back(random.Rand<uint8_t>());
}
temporal_layers_.reserve(kMaxSimulcastStreams);
temporal_layers_checkers_.reserve(kMaxSimulcastStreams);
raw_images_.reserve(kMaxSimulcastStreams);
encoded_images_.reserve(kMaxSimulcastStreams);
send_stream_.reserve(kMaxSimulcastStreams);
cpu_speed_.assign(kMaxSimulcastStreams, cpu_speed_default_);
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();
}
for (size_t i = 0; i < temporal_layers_.size(); ++i) {
tl0_pic_idx_[i] = temporal_layers_[i]->Tl0PicIdx();
}
temporal_layers_.clear();
temporal_layers_checkers_.clear();
inited_ = false;
return ret_val;
}
int VP8EncoderImpl::SetRateAllocation(const BitrateAllocation& bitrate,
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 (bitrate.get_sum_bps() == 0) {
// Encoder paused, turn off all encoding.
const int num_streams = static_cast<size_t>(encoders_.size());
for (int i = 0; i < num_streams; ++i)
SetStreamState(false, i);
return WEBRTC_VIDEO_CODEC_OK;
}
// At this point, bitrate allocation should already match codec settings.
if (codec_.maxBitrate > 0)
RTC_DCHECK_LE(bitrate.get_sum_kbps(), codec_.maxBitrate);
RTC_DCHECK_GE(bitrate.get_sum_kbps(), codec_.minBitrate);
if (codec_.numberOfSimulcastStreams > 0)
RTC_DCHECK_GE(bitrate.get_sum_kbps(), codec_.simulcastStream[0].minBitrate);
codec_.maxFramerate = new_framerate;
if (encoders_.size() > 1) {
// 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_;
}
}
size_t stream_idx = encoders_.size() - 1;
for (size_t i = 0; i < encoders_.size(); ++i, --stream_idx) {
unsigned int target_bitrate_kbps =
bitrate.GetSpatialLayerSum(stream_idx) / 1000;
bool send_stream = target_bitrate_kbps > 0;
if (send_stream || encoders_.size() > 1)
SetStreamState(send_stream, stream_idx);
configurations_[i].rc_target_bitrate = target_bitrate_kbps;
temporal_layers_[stream_idx]->UpdateConfiguration(&configurations_[i]);
if (vpx_codec_enc_config_set(&encoders_[i], &configurations_[i])) {
return WEBRTC_VIDEO_CODEC_ERROR;
}
}
return WEBRTC_VIDEO_CODEC_OK;
}
const char* VP8EncoderImpl::ImplementationName() const {
return "libvpx";
}
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) {
RTC_DCHECK(codec.VP8().tl_factory != nullptr);
const TemporalLayersFactory* tl_factory = codec.VP8().tl_factory;
if (num_streams == 1) {
temporal_layers_.emplace_back(
tl_factory->Create(0, num_temporal_layers, tl0_pic_idx_[0]));
temporal_layers_checkers_.emplace_back(
tl_factory->CreateChecker(0, num_temporal_layers, tl0_pic_idx_[0]));
} else {
for (int i = 0; i < num_streams; ++i) {
RTC_CHECK_GT(num_temporal_layers, 0);
int layers = std::max(static_cast<uint8_t>(1),
codec.simulcastStream[i].numberOfTemporalLayers);
temporal_layers_.emplace_back(
tl_factory->Create(i, layers, tl0_pic_idx_[i]));
temporal_layers_checkers_.emplace_back(
tl_factory->CreateChecker(i, layers, tl0_pic_idx_[i]));
}
}
}
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->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) ||
!ValidSimulcastTemporalLayers(*inst, number_of_streams))) {
return WEBRTC_VIDEO_CODEC_ERR_SIMULCAST_PARAMETERS_NOT_SUPPORTED;
}
int num_temporal_layers =
doing_simulcast ? inst->simulcastStream[0].numberOfTemporalLayers
: inst->VP8().numberOfTemporalLayers;
RTC_DCHECK_GT(num_temporal_layers, 0);
SetupTemporalLayers(number_of_streams, num_temporal_layers, *inst);
number_of_cores_ = number_of_cores;
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;
}
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) {
// allocate memory for encoded image
if (encoded_images_[i]._buffer != NULL) {
delete[] encoded_images_[i]._buffer;
}
encoded_images_[i]._size =
CalcBufferSize(VideoType::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->VP8().resilience) {
case kResilienceOff:
configurations_[0].g_error_resilient = 0;
break;
case kResilientStream:
configurations_[0].g_error_resilient = VPX_ERROR_RESILIENT_DEFAULT;
break;
case kResilientFrames:
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER; // Not supported
}
// rate control settings
configurations_[0].rc_dropframe_thresh = inst->VP8().frameDroppingOn ? 30 : 0;
configurations_[0].rc_end_usage = VPX_CBR;
configurations_[0].g_pass = VPX_RC_ONE_PASS;
// Handle resizing outside of libvpx.
configurations_[0].rc_resize_allowed = 0;
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 (inst->VP8().keyFrameInterval > 0) {
configurations_[0].kf_mode = VPX_KF_AUTO;
configurations_[0].kf_max_dist = inst->VP8().keyFrameInterval;
} else {
configurations_[0].kf_mode = VPX_KF_DISABLED;
}
// Allow the user to set the complexity for the base stream.
switch (inst->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);
// 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;
SimulcastRateAllocator init_allocator(codec_, nullptr);
BitrateAllocation allocation = init_allocator.GetAllocation(
inst->startBitrate * 1000, inst->maxFramerate);
std::vector<uint32_t> stream_bitrates;
for (int i = 0; i == 0 || i < inst->numberOfSimulcastStreams; ++i) {
uint32_t bitrate = allocation.GetSpatialLayerSum(i) / 1000;
stream_bitrates.push_back(bitrate);
}
configurations_[0].rc_target_bitrate = stream_bitrates[stream_idx];
temporal_layers_[stream_idx]->OnRatesUpdated(
stream_bitrates[stream_idx], inst->maxBitrate, inst->maxFramerate);
temporal_layers_[stream_idx]->UpdateConfiguration(&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]->OnRatesUpdated(
stream_bitrates[stream_idx], inst->maxBitrate, inst->maxFramerate);
temporal_layers_[stream_idx]->UpdateConfiguration(&configurations_[i]);
}
return InitAndSetControlSettings();
}
int VP8EncoderImpl::SetCpuSpeed(int width, int height) {
#if defined(WEBRTC_ARCH_ARM) || defined(WEBRTC_ARCH_ARM64) \
|| defined(WEBRTC_ANDROID)
// On mobile platform, use a lower speed setting for lower resolutions for
// CPUs with 4 or more cores.
RTC_DCHECK_GT(number_of_cores_, 0);
if (number_of_cores_ <= 3)
return -12;
if (width * height <= 352 * 288)
return -8;
else if (width * height <= 640 * 480)
return -10;
else
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 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 defined(WEBRTC_ANDROID)
if (width * height >= 320 * 180) {
if (cpus >= 4) {
// 3 threads for CPUs with 4 and more cores since most of times only 4
// cores will be active.
return 3;
} else if (cpus == 3 || cpus == 2) {
return 2;
} else {
return 1;
}
}
return 1;
#else
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;
}
#endif
}
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) \
|| defined(WEBRTC_ANDROID)
denoiser_state = kDenoiserOnYOnly;
#else
denoiser_state = kDenoiserOnAdaptive;
#endif
vpx_codec_control(&encoders_[0], VP8E_SET_NOISE_SENSITIVITY,
codec_.VP8()->denoisingOn ? denoiser_state : kDenoiserOff);
if (encoders_.size() > 2) {
vpx_codec_control(
&encoders_[1], VP8E_SET_NOISE_SENSITIVITY,
codec_.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>(kTokenPartitions));
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);
// Apply boost on golden frames (has only effect when resilience is off).
if (use_gf_boost_ && codec_.VP8()->resilience == kResilienceOff) {
int gf_boost_percent;
if (GetGfBoostPercentageFromFieldTrialGroup(&gf_boost_percent)) {
vpx_codec_control(&(encoders_[i]), VP8E_SET_GF_CBR_BOOST_PCT,
gf_boost_percent);
}
}
}
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) {
RTC_DCHECK_EQ(frame.width(), codec_.width);
RTC_DCHECK_EQ(frame.height(), codec_.height);
if (!inited_)
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
if (encoded_complete_callback_ == NULL)
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
rtc::scoped_refptr<I420BufferInterface> input_image =
frame.video_frame_buffer()->ToI420();
// Since we are extracting raw pointers from |input_image| to
// |raw_images_[0]|, the resolution of these frames must match.
RTC_DCHECK_EQ(input_image->width(), raw_images_[0].d_w);
RTC_DCHECK_EQ(input_image->height(), 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->DataY());
raw_images_[0].planes[VPX_PLANE_U] =
const_cast<uint8_t*>(input_image->DataU());
raw_images_[0].planes[VPX_PLANE_V] =
const_cast<uint8_t*>(input_image->DataV());
raw_images_[0].stride[VPX_PLANE_Y] = input_image->StrideY();
raw_images_[0].stride[VPX_PLANE_U] = input_image->StrideU();
raw_images_[0].stride[VPX_PLANE_V] = input_image->StrideV();
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);
}
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] == kVideoFrameKey && send_stream_[i]) {
send_key_frame = true;
break;
}
}
}
vpx_enc_frame_flags_t flags[kMaxSimulcastStreams];
TemporalLayers::FrameConfig tl_configs[kMaxSimulcastStreams];
for (size_t i = 0; i < encoders_.size(); ++i) {
tl_configs[i] = temporal_layers_[i]->UpdateLayerConfig(frame.timestamp());
RTC_DCHECK(temporal_layers_checkers_[i]->CheckTemporalConfig(
send_key_frame, tl_configs[i]));
if (tl_configs[i].drop_frame) {
// Drop this frame.
return WEBRTC_VIDEO_CODEC_OK;
}
flags[i] = EncodeFlags(tl_configs[i]);
}
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_.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);
}
// 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,
tl_configs[i].encoder_layer_id);
}
// 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;
int error = WEBRTC_VIDEO_CODEC_OK;
int num_tries = 0;
// If the first try returns WEBRTC_VIDEO_CODEC_TARGET_BITRATE_OVERSHOOT
// the frame must be reencoded with the same parameters again because
// target bitrate is exceeded and encoder state has been reset.
while (num_tries == 0 ||
(num_tries == 1 &&
error == WEBRTC_VIDEO_CODEC_TARGET_BITRATE_OVERSHOOT)) {
++num_tries;
// 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.
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;
// Examines frame timestamps only.
error = GetEncodedPartitions(tl_configs, frame);
}
return error;
}
void VP8EncoderImpl::PopulateCodecSpecific(
CodecSpecificInfo* codec_specific,
const TemporalLayers::FrameConfig& tl_config,
const vpx_codec_cx_pkt_t& pkt,
int stream_idx,
uint32_t timestamp) {
assert(codec_specific != NULL);
codec_specific->codecType = kVideoCodecVP8;
codec_specific->codec_name = ImplementationName();
CodecSpecificInfoVP8* vp8Info = &(codec_specific->codecSpecific.VP8);
vp8Info->pictureId = 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) != 0;
temporal_layers_[stream_idx]->PopulateCodecSpecific(
(pkt.data.frame.flags & VPX_FRAME_IS_KEY) != 0, tl_config, vp8Info,
timestamp);
// Prepare next.
picture_id_[stream_idx] = (picture_id_[stream_idx] + 1) & 0x7FFF;
}
int VP8EncoderImpl::GetEncodedPartitions(
const TemporalLayers::FrameConfig tl_configs[],
const VideoFrame& input_image) {
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 = kVideoFrameDelta;
RTPFragmentationHeader frag_info;
// kTokenPartitions is number of bits used.
frag_info.VerifyAndAllocateFragmentationHeader((1 << kTokenPartitions) + 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: {
size_t length = encoded_images_[encoder_idx]._length;
if (pkt->data.frame.sz + length >
encoded_images_[encoder_idx]._size) {
uint8_t* buffer = new uint8_t[pkt->data.frame.sz + length];
memcpy(buffer, encoded_images_[encoder_idx]._buffer, length);
delete[] encoded_images_[encoder_idx]._buffer;
encoded_images_[encoder_idx]._buffer = buffer;
encoded_images_[encoder_idx]._size = pkt->data.frame.sz + 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 = kVideoFrameKey;
}
PopulateCodecSpecific(&codec_specific, tl_configs[stream_idx], *pkt,
stream_idx, input_image.timestamp());
break;
}
}
encoded_images_[encoder_idx]._timeStamp = input_image.timestamp();
encoded_images_[encoder_idx].capture_time_ms_ =
input_image.render_time_ms();
encoded_images_[encoder_idx].rotation_ = input_image.rotation();
encoded_images_[encoder_idx].content_type_ =
(codec_.mode == kScreensharing) ? VideoContentType::SCREENSHARE
: VideoContentType::UNSPECIFIED;
encoded_images_[encoder_idx].timing_.flags = TimingFrameFlags::kInvalid;
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, 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;
// Report once per frame (lowest stream always sent).
encoded_images_[encoder_idx].adapt_reason_.bw_resolutions_disabled =
(stream_idx == 0) ? bw_resolutions_disabled : -1;
int qp_128 = -1;
vpx_codec_control(&encoders_[encoder_idx], VP8E_GET_LAST_QUANTIZER,
&qp_128);
encoded_images_[encoder_idx].qp_ = qp_128;
encoded_complete_callback_->OnEncodedImage(encoded_images_[encoder_idx],
&codec_specific, &frag_info);
} else if (codec_.mode == kScreensharing) {
result = WEBRTC_VIDEO_CODEC_TARGET_BITRATE_OVERSHOOT;
}
}
}
return result;
}
VideoEncoder::ScalingSettings VP8EncoderImpl::GetScalingSettings() const {
const bool enable_scaling = encoders_.size() == 1 &&
configurations_[0].rc_dropframe_thresh > 0 &&
codec_.VP8().automaticResizeOn;
if (enable_scaling && min_pixels_per_frame_) {
return VideoEncoder::ScalingSettings(enable_scaling,
*min_pixels_per_frame_);
}
return VideoEncoder::ScalingSettings(enable_scaling);
}
int VP8EncoderImpl::SetChannelParameters(uint32_t packetLoss, int64_t rtt) {
return WEBRTC_VIDEO_CODEC_OK;
}
int VP8EncoderImpl::RegisterEncodeCompleteCallback(
EncodedImageCallback* callback) {
encoded_complete_callback_ = callback;
return WEBRTC_VIDEO_CODEC_OK;
}
class VP8DecoderImpl::QpSmoother {
public:
QpSmoother() : last_sample_ms_(rtc::TimeMillis()), smoother_(kAlpha) {}
int GetAvg() const {
float value = smoother_.filtered();
return (value == rtc::ExpFilter::kValueUndefined) ? 0
: static_cast<int>(value);
}
void Add(float sample) {
int64_t now_ms = rtc::TimeMillis();
smoother_.Apply(static_cast<float>(now_ms - last_sample_ms_), sample);
last_sample_ms_ = now_ms;
}
void Reset() { smoother_.Reset(kAlpha); }
private:
const float kAlpha = 0.95f;
int64_t last_sample_ms_;
rtc::ExpFilter smoother_;
};
VP8DecoderImpl::VP8DecoderImpl()
: use_postproc_arm_(
webrtc::field_trial::IsEnabled(kVp8PostProcArmFieldTrial)),
buffer_pool_(false, 300 /* max_number_of_buffers*/),
decode_complete_callback_(NULL),
inited_(false),
decoder_(NULL),
propagation_cnt_(-1),
last_frame_width_(0),
last_frame_height_(0),
key_frame_required_(true),
qp_smoother_(use_postproc_arm_ ? new QpSmoother() : nullptr) {
if (use_postproc_arm_)
GetPostProcParamsFromFieldTrialGroup(&deblock_);
}
VP8DecoderImpl::~VP8DecoderImpl() {
inited_ = true; // in order to do the actual release
Release();
}
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;
memset(decoder_, 0, sizeof(*decoder_));
}
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
#if defined(WEBRTC_ARCH_ARM) || defined(WEBRTC_ARCH_ARM64) \
|| defined(WEBRTC_ANDROID)
vpx_codec_flags_t flags = use_postproc_arm_ ? VPX_CODEC_USE_POSTPROC : 0;
#else
vpx_codec_flags_t flags = VPX_CODEC_USE_POSTPROC;
#endif
if (vpx_codec_dec_init(decoder_, vpx_codec_vp8_dx(), &cfg, flags)) {
delete decoder_;
decoder_ = nullptr;
return WEBRTC_VIDEO_CODEC_MEMORY;
}
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;
}
// Post process configurations.
#if defined(WEBRTC_ARCH_ARM) || defined(WEBRTC_ARCH_ARM64) \
|| defined(WEBRTC_ANDROID)
if (use_postproc_arm_) {
vp8_postproc_cfg_t ppcfg;
ppcfg.post_proc_flag = VP8_MFQE;
// For low resolutions, use stronger deblocking filter.
int last_width_x_height = last_frame_width_ * last_frame_height_;
if (last_width_x_height > 0 && last_width_x_height <= 320 * 240) {
// Enable the deblock and demacroblocker based on qp thresholds.
RTC_DCHECK(qp_smoother_);
int qp = qp_smoother_->GetAvg();
if (qp > deblock_.min_qp) {
int level = deblock_.max_level;
if (qp < deblock_.degrade_qp) {
// Use lower level.
level = deblock_.max_level * (qp - deblock_.min_qp) /
(deblock_.degrade_qp - deblock_.min_qp);
}
// Deblocking level only affects VP8_DEMACROBLOCK.
ppcfg.deblocking_level = std::max(level, 1);
ppcfg.post_proc_flag |= VP8_DEBLOCK | VP8_DEMACROBLOCK;
}
}
vpx_codec_control(decoder_, VP8_SET_POSTPROC, &ppcfg);
}
#else
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 != kVideoFrameKey)
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.
// Reset on a key frame refresh.
if (input_image._frameType == kVideoFrameKey && 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;
}
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;
}
img = vpx_codec_get_frame(decoder_, &iter);
int qp;
vpx_codec_err_t vpx_ret =
vpx_codec_control(decoder_, VPXD_GET_LAST_QUANTIZER, &qp);
RTC_DCHECK_EQ(vpx_ret, VPX_CODEC_OK);
ret = ReturnFrame(img, input_image._timeStamp, input_image.ntp_time_ms_, qp);
if (ret != 0) {
// Reset to avoid requesting key frames too often.
if (ret < 0 && propagation_cnt_ > 0)
propagation_cnt_ = 0;
return ret;
}
// 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::ReturnFrame(const vpx_image_t* img,
uint32_t timestamp,
int64_t ntp_time_ms,
int qp) {
if (img == NULL) {
// Decoder OK and NULL image => No show frame
return WEBRTC_VIDEO_CODEC_NO_OUTPUT;
}
if (qp_smoother_) {
if (last_frame_width_ != static_cast<int>(img->d_w) ||
last_frame_height_ != static_cast<int>(img->d_h)) {
qp_smoother_->Reset();
}
qp_smoother_->Add(qp);
}
last_frame_width_ = img->d_w;
last_frame_height_ = img->d_h;
// Allocate memory for decoded image.
rtc::scoped_refptr<I420Buffer> buffer =
buffer_pool_.CreateBuffer(img->d_w, img->d_h);
if (!buffer.get()) {
// Pool has too many pending frames.
RTC_HISTOGRAM_BOOLEAN("WebRTC.Video.VP8DecoderImpl.TooManyPendingFrames",
1);
return WEBRTC_VIDEO_CODEC_NO_OUTPUT;
}
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],
buffer->MutableDataY(), buffer->StrideY(),
buffer->MutableDataU(), buffer->StrideU(),
buffer->MutableDataV(), buffer->StrideV(), img->d_w,
img->d_h);
VideoFrame decoded_image(buffer, timestamp, 0, kVideoRotation_0);
decoded_image.set_ntp_time_ms(ntp_time_ms);
decode_complete_callback_->Decoded(decoded_image, rtc::Optional<int32_t>(),
rtc::Optional<uint8_t>(qp));
return WEBRTC_VIDEO_CODEC_OK;
}
int VP8DecoderImpl::RegisterDecodeCompleteCallback(
DecodedImageCallback* callback) {
decode_complete_callback_ = callback;
return WEBRTC_VIDEO_CODEC_OK;
}
int VP8DecoderImpl::Release() {
if (decoder_ != NULL) {
if (vpx_codec_destroy(decoder_)) {
return WEBRTC_VIDEO_CODEC_MEMORY;
}
delete decoder_;
decoder_ = NULL;
}
buffer_pool_.Release();
inited_ = false;
return WEBRTC_VIDEO_CODEC_OK;
}
const char* VP8DecoderImpl::ImplementationName() const {
return "libvpx";
}
} // namespace webrtc
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