| // Copyright 2020 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/video/vpx_video_encoder.h" |
| |
| #include "base/cxx17_backports.h" |
| #include "base/logging.h" |
| #include "base/numerics/checked_math.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/system/sys_info.h" |
| #include "base/time/time.h" |
| #include "base/trace_event/trace_event.h" |
| #include "media/base/bind_to_current_loop.h" |
| #include "media/base/svc_scalability_mode.h" |
| #include "media/base/video_frame.h" |
| #include "media/base/video_util.h" |
| #include "third_party/libvpx/source/libvpx/vpx/vp8cx.h" |
| #include "third_party/libyuv/include/libyuv/convert.h" |
| |
| namespace media { |
| |
| namespace { |
| |
| constexpr vpx_enc_frame_flags_t VP8_UPDATE_NOTHING = |
| VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_LAST; |
| |
| // Frame Pattern: |
| // Layer Index 0: |0| |2| |4| |6| |8| |
| // Layer Index 1: | |1| |3| |5| |7| | |
| vpx_enc_frame_flags_t vp8_2layers_temporal_flags[] = { |
| // Layer 0 : update and reference only last frame |
| VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_UPD_GF | |
| VP8_EFLAG_NO_UPD_ARF, |
| |
| // Layer 1: only reference last frame, no updates |
| VP8_UPDATE_NOTHING | VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_REF_GF}; |
| |
| // Frame Pattern: |
| // Layer Index 0: |0| | | |4| | | |8| | | |12| |
| // Layer Index 1: | | |2| | | |6| | | |10| | | |
| // Layer Index 2: | |1| |3| |5| |7| |9| |11| | |
| vpx_enc_frame_flags_t vp8_3layers_temporal_flags[] = { |
| // Layer 0 : update and reference only last frame |
| // It only depends on layer 0 |
| VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_UPD_GF | |
| VP8_EFLAG_NO_UPD_ARF, |
| |
| // Layer 2: only reference last frame, no updates |
| // It only depends on layer 0 |
| VP8_UPDATE_NOTHING | VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_REF_GF, |
| |
| // Layer 1: only reference last frame, update gold frame |
| // It only depends on layer 0 |
| VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_UPD_ARF | |
| VP8_EFLAG_NO_UPD_LAST, |
| |
| // Layer 2: reference last frame and gold frame, no updates |
| // It depends on layer 0 and layer 1 |
| VP8_UPDATE_NOTHING | VP8_EFLAG_NO_REF_ARF, |
| }; |
| |
| // Returns the number of threads. |
| int GetNumberOfThreads(int width) { |
| // Default to 1 thread for less than VGA. |
| int desired_threads = 1; |
| |
| if (width >= 3840) |
| desired_threads = 16; |
| else if (width >= 2560) |
| desired_threads = 8; |
| else if (width >= 1280) |
| desired_threads = 4; |
| else if (width >= 640) |
| desired_threads = 2; |
| |
| // Clamp to the number of available logical processors/cores. |
| desired_threads = |
| std::min(desired_threads, base::SysInfo::NumberOfProcessors()); |
| |
| return desired_threads; |
| } |
| |
| Status SetUpVpxConfig(const VideoEncoder::Options& opts, |
| vpx_codec_enc_cfg_t* config) { |
| if (opts.frame_size.width() <= 0 || opts.frame_size.height() <= 0) |
| return Status(StatusCode::kEncoderUnsupportedConfig, |
| "Negative width or height values."); |
| |
| if (!opts.frame_size.GetCheckedArea().IsValid()) |
| return Status(StatusCode::kEncoderUnsupportedConfig, "Frame is too large."); |
| |
| config->g_pass = VPX_RC_ONE_PASS; |
| config->g_lag_in_frames = 0; |
| config->rc_max_quantizer = 58; |
| config->rc_min_quantizer = 2; |
| config->rc_resize_allowed = 0; |
| config->rc_dropframe_thresh = 0; // Don't drop frames |
| config->g_timebase.num = 1; |
| config->g_timebase.den = base::Time::kMicrosecondsPerSecond; |
| |
| // Set the number of threads based on the image width and num of cores. |
| config->g_threads = GetNumberOfThreads(opts.frame_size.width()); |
| |
| // Insert keyframes at will with a given max interval |
| if (opts.keyframe_interval.has_value()) { |
| config->kf_mode = VPX_KF_AUTO; |
| config->kf_min_dist = 0; |
| config->kf_max_dist = opts.keyframe_interval.value(); |
| } |
| |
| if (opts.bitrate.has_value()) { |
| auto& bitrate = opts.bitrate.value(); |
| config->rc_target_bitrate = bitrate.target() / 1000; |
| switch (bitrate.mode()) { |
| case Bitrate::Mode::kVariable: |
| config->rc_end_usage = VPX_VBR; |
| break; |
| case Bitrate::Mode::kConstant: |
| config->rc_end_usage = VPX_CBR; |
| break; |
| } |
| } else { |
| config->rc_target_bitrate = |
| double{opts.frame_size.GetCheckedArea().ValueOrDie()} / config->g_w / |
| config->g_h * config->rc_target_bitrate; |
| } |
| |
| config->g_w = opts.frame_size.width(); |
| config->g_h = opts.frame_size.height(); |
| |
| if (!opts.scalability_mode) |
| return Status(); |
| |
| switch (opts.scalability_mode.value()) { |
| case SVCScalabilityMode::kL1T2: |
| // Frame Pattern: |
| // Layer Index 0: |0| |2| |4| |6| |8| |
| // Layer Index 1: | |1| |3| |5| |7| | |
| config->ts_number_layers = 2; |
| config->ts_periodicity = 2; |
| DCHECK_EQ(config->ts_periodicity, |
| sizeof(vp8_2layers_temporal_flags) / |
| sizeof(vp8_2layers_temporal_flags[0])); |
| config->ts_layer_id[0] = 0; |
| config->ts_layer_id[1] = 1; |
| config->ts_rate_decimator[0] = 2; |
| config->ts_rate_decimator[1] = 1; |
| // Bitrate allocation L0: 60% L1: 40% |
| config->ts_target_bitrate[0] = 60 * config->rc_target_bitrate / 100; |
| config->ts_target_bitrate[1] = config->rc_target_bitrate; |
| config->temporal_layering_mode = VP9E_TEMPORAL_LAYERING_MODE_0101; |
| config->g_error_resilient = VPX_ERROR_RESILIENT_DEFAULT; |
| break; |
| case SVCScalabilityMode::kL1T3: |
| // Frame Pattern: |
| // Layer Index 0: |0| | | |4| | | |8| | | |12| |
| // Layer Index 1: | | |2| | | |6| | | |10| | | |
| // Layer Index 2: | |1| |3| |5| |7| |9| |11| | |
| config->ts_number_layers = 3; |
| config->ts_periodicity = 4; |
| DCHECK_EQ(config->ts_periodicity, |
| sizeof(vp8_3layers_temporal_flags) / |
| sizeof(vp8_3layers_temporal_flags[0])); |
| config->ts_layer_id[0] = 0; |
| config->ts_layer_id[1] = 2; |
| config->ts_layer_id[2] = 1; |
| config->ts_layer_id[3] = 2; |
| config->ts_rate_decimator[0] = 4; |
| config->ts_rate_decimator[1] = 2; |
| config->ts_rate_decimator[2] = 1; |
| // Bitrate allocation L0: 50% L1: 20% L2: 30% |
| config->ts_target_bitrate[0] = 50 * config->rc_target_bitrate / 100; |
| config->ts_target_bitrate[1] = 70 * config->rc_target_bitrate / 100; |
| config->ts_target_bitrate[2] = config->rc_target_bitrate; |
| config->temporal_layering_mode = VP9E_TEMPORAL_LAYERING_MODE_0212; |
| config->g_error_resilient = VPX_ERROR_RESILIENT_DEFAULT; |
| break; |
| default: { |
| return Status(StatusCode::kEncoderUnsupportedConfig, |
| "Unsupported number of temporal layers."); |
| } |
| } |
| |
| return Status(); |
| } |
| |
| Status ReallocateVpxImageIfNeeded(vpx_image_t* vpx_image, |
| const vpx_img_fmt fmt, |
| int width, |
| int height) { |
| if (vpx_image->fmt != fmt || static_cast<int>(vpx_image->w) != width || |
| static_cast<int>(vpx_image->h) != height) { |
| vpx_img_free(vpx_image); |
| if (vpx_image != vpx_img_alloc(vpx_image, fmt, width, height, 1)) { |
| return Status(StatusCode::kEncoderFailedEncode, |
| "Invalid format or frame size."); |
| } |
| vpx_image->bit_depth = (fmt & VPX_IMG_FMT_HIGHBITDEPTH) ? 16 : 8; |
| } |
| // else no-op since the image don't need to change format. |
| return Status(); |
| } |
| |
| void FreeCodecCtx(vpx_codec_ctx_t* codec_ctx) { |
| if (codec_ctx->name) { |
| // Codec has been initialized, we need to destroy it. |
| auto error = vpx_codec_destroy(codec_ctx); |
| DCHECK_EQ(error, VPX_CODEC_OK); |
| } |
| |
| delete codec_ctx; |
| } |
| |
| } // namespace |
| |
| VpxVideoEncoder::VpxVideoEncoder() : codec_(nullptr, FreeCodecCtx) {} |
| |
| void VpxVideoEncoder::Initialize(VideoCodecProfile profile, |
| const Options& options, |
| OutputCB output_cb, |
| StatusCB done_cb) { |
| done_cb = BindToCurrentLoop(std::move(done_cb)); |
| if (codec_) { |
| std::move(done_cb).Run(StatusCode::kEncoderInitializeTwice); |
| return; |
| } |
| profile_ = profile; |
| bool is_vp9 = false; |
| |
| vpx_codec_iface_t* iface = nullptr; |
| if (profile == VP8PROFILE_ANY) { |
| iface = vpx_codec_vp8_cx(); |
| } else if (profile == VP9PROFILE_PROFILE0 || profile == VP9PROFILE_PROFILE2) { |
| // TODO(https://crbug.com/1116617): Consider support for profiles 1 and 3. |
| is_vp9 = true; |
| iface = vpx_codec_vp9_cx(); |
| } else { |
| auto status = Status(StatusCode::kEncoderUnsupportedProfile) |
| .WithData("profile", profile); |
| std::move(done_cb).Run(status); |
| return; |
| } |
| |
| auto vpx_error = vpx_codec_enc_config_default(iface, &codec_config_, 0); |
| if (vpx_error != VPX_CODEC_OK) { |
| auto status = Status(StatusCode::kEncoderInitializationError, |
| "Failed to get default VPX config.") |
| .WithData("vpx_error", vpx_error); |
| std::move(done_cb).Run(status); |
| return; |
| } |
| |
| vpx_img_fmt img_fmt = VPX_IMG_FMT_NONE; |
| unsigned int bits_for_storage = 8; |
| switch (profile) { |
| case VP9PROFILE_PROFILE1: |
| codec_config_.g_profile = 1; |
| break; |
| case VP9PROFILE_PROFILE2: |
| codec_config_.g_profile = 2; |
| img_fmt = VPX_IMG_FMT_I42016; |
| bits_for_storage = 16; |
| codec_config_.g_bit_depth = VPX_BITS_10; |
| codec_config_.g_input_bit_depth = 10; |
| break; |
| case VP9PROFILE_PROFILE3: |
| codec_config_.g_profile = 3; |
| break; |
| default: |
| codec_config_.g_profile = 0; |
| img_fmt = VPX_IMG_FMT_I420; |
| bits_for_storage = 8; |
| codec_config_.g_bit_depth = VPX_BITS_8; |
| codec_config_.g_input_bit_depth = 8; |
| break; |
| } |
| |
| Status status = SetUpVpxConfig(options, &codec_config_); |
| if (!status.is_ok()) { |
| std::move(done_cb).Run(status); |
| return; |
| } |
| |
| vpx_codec_unique_ptr codec(new vpx_codec_ctx_t, FreeCodecCtx); |
| codec->name = nullptr; // We are allowed to use vpx_codec_ctx_t.name |
| vpx_error = vpx_codec_enc_init( |
| codec.get(), iface, &codec_config_, |
| codec_config_.g_bit_depth == VPX_BITS_8 ? 0 : VPX_CODEC_USE_HIGHBITDEPTH); |
| if (vpx_error != VPX_CODEC_OK) { |
| std::string msg = base::StringPrintf( |
| "VPX encoder initialization error: %s %s", |
| vpx_codec_err_to_string(vpx_error), codec->err_detail); |
| DLOG(ERROR) << msg; |
| status = Status(StatusCode::kEncoderInitializationError, msg); |
| std::move(done_cb).Run(status); |
| return; |
| } |
| |
| // For VP9 the values used for real-time encoding mode are 5, 6, 7, |
| // 8, 9. Higher means faster encoding, but lower quality. |
| // For VP8 typical values used for real-time encoding are -4, -6, |
| // -8, -10. Again larger magnitude means faster encoding but lower |
| // quality. |
| int cpu_used = is_vp9 ? 7 : -6; |
| vpx_error = vpx_codec_control(codec.get(), VP8E_SET_CPUUSED, cpu_used); |
| if (vpx_error != VPX_CODEC_OK) { |
| std::string msg = |
| base::StringPrintf("VPX encoder VP8E_SET_CPUUSED error: %s", |
| vpx_codec_err_to_string(vpx_error)); |
| DLOG(ERROR) << msg; |
| status = Status(StatusCode::kEncoderInitializationError, msg); |
| std::move(done_cb).Run(status); |
| return; |
| } |
| |
| if (&vpx_image_ != vpx_img_alloc(&vpx_image_, img_fmt, |
| options.frame_size.width(), |
| options.frame_size.height(), 1)) { |
| status = Status(StatusCode::kEncoderInitializationError, |
| "Invalid format or frame size."); |
| std::move(done_cb).Run(status); |
| return; |
| } |
| vpx_image_.bit_depth = bits_for_storage; |
| |
| if (is_vp9) { |
| // Set the number of column tiles in encoding an input frame, with number of |
| // tile columns (in Log2 unit) as the parameter. |
| // The minimum width of a tile column is 256 pixels, the maximum is 4096. |
| int log2_tile_columns = |
| static_cast<int>(std::log2(codec_config_.g_w / 256)); |
| vpx_codec_control(codec.get(), VP9E_SET_TILE_COLUMNS, log2_tile_columns); |
| |
| // Turn on row level multi-threading. |
| vpx_codec_control(codec.get(), VP9E_SET_ROW_MT, 1); |
| |
| // In CBR mode use aq-mode=3 is enabled for quality improvement |
| if (codec_config_.rc_end_usage == VPX_CBR) |
| vpx_codec_control(codec.get(), VP9E_SET_AQ_MODE, 3); |
| } |
| |
| options_ = options; |
| originally_configured_size_ = options.frame_size; |
| output_cb_ = BindToCurrentLoop(std::move(output_cb)); |
| codec_ = std::move(codec); |
| std::move(done_cb).Run(Status()); |
| } |
| |
| void VpxVideoEncoder::Encode(scoped_refptr<VideoFrame> frame, |
| bool key_frame, |
| StatusCB done_cb) { |
| done_cb = BindToCurrentLoop(std::move(done_cb)); |
| if (!codec_) { |
| std::move(done_cb).Run(StatusCode::kEncoderInitializeNeverCompleted); |
| return; |
| } |
| |
| if (!frame) { |
| std::move(done_cb).Run(Status(StatusCode::kEncoderFailedEncode, |
| "No frame provided for encoding.")); |
| return; |
| } |
| bool supported_format = frame->format() == PIXEL_FORMAT_NV12 || |
| frame->format() == PIXEL_FORMAT_I420 || |
| frame->format() == PIXEL_FORMAT_XBGR || |
| frame->format() == PIXEL_FORMAT_XRGB || |
| frame->format() == PIXEL_FORMAT_ABGR || |
| frame->format() == PIXEL_FORMAT_ARGB; |
| if ((!frame->IsMappable() && !frame->HasGpuMemoryBuffer()) || |
| !supported_format) { |
| Status status = |
| Status(StatusCode::kEncoderFailedEncode, "Unexpected frame format.") |
| .WithData("IsMappable", frame->IsMappable()) |
| .WithData("format", frame->format()); |
| std::move(done_cb).Run(std::move(status)); |
| return; |
| } |
| |
| if (frame->format() == PIXEL_FORMAT_NV12 && frame->HasGpuMemoryBuffer()) { |
| frame = ConvertToMemoryMappedFrame(frame); |
| if (!frame) { |
| std::move(done_cb).Run( |
| Status(StatusCode::kEncoderFailedEncode, |
| "Convert GMB frame to MemoryMappedFrame failed.")); |
| return; |
| } |
| } |
| |
| const bool is_yuv = IsYuvPlanar(frame->format()); |
| if (frame->visible_rect().size() != options_.frame_size || !is_yuv) { |
| auto resized_frame = frame_pool_.CreateFrame( |
| is_yuv ? frame->format() : PIXEL_FORMAT_I420, options_.frame_size, |
| gfx::Rect(options_.frame_size), options_.frame_size, |
| frame->timestamp()); |
| Status status; |
| if (resized_frame) { |
| status = ConvertAndScaleFrame(*frame, *resized_frame, resize_buf_); |
| } else { |
| status = Status(StatusCode::kEncoderFailedEncode, |
| "Can't allocate a resized frame."); |
| } |
| if (!status.is_ok()) { |
| std::move(done_cb).Run(std::move(status)); |
| return; |
| } |
| frame = std::move(resized_frame); |
| } |
| |
| switch (profile_) { |
| case VP9PROFILE_PROFILE2: |
| // Profile 2 uses 10bit color, |
| libyuv::I420ToI010( |
| frame->visible_data(VideoFrame::kYPlane), |
| frame->stride(VideoFrame::kYPlane), |
| frame->visible_data(VideoFrame::kUPlane), |
| frame->stride(VideoFrame::kUPlane), |
| frame->visible_data(VideoFrame::kVPlane), |
| frame->stride(VideoFrame::kVPlane), |
| reinterpret_cast<uint16_t*>(vpx_image_.planes[VPX_PLANE_Y]), |
| vpx_image_.stride[VPX_PLANE_Y] / 2, |
| reinterpret_cast<uint16_t*>(vpx_image_.planes[VPX_PLANE_U]), |
| vpx_image_.stride[VPX_PLANE_U] / 2, |
| reinterpret_cast<uint16_t*>(vpx_image_.planes[VPX_PLANE_V]), |
| vpx_image_.stride[VPX_PLANE_V] / 2, frame->visible_rect().width(), |
| frame->visible_rect().height()); |
| break; |
| case VP9PROFILE_PROFILE1: |
| case VP9PROFILE_PROFILE3: |
| NOTREACHED(); |
| break; |
| default: |
| vpx_img_fmt_t fmt = frame->format() == PIXEL_FORMAT_NV12 |
| ? VPX_IMG_FMT_NV12 |
| : VPX_IMG_FMT_I420; |
| Status status = ReallocateVpxImageIfNeeded( |
| &vpx_image_, fmt, codec_config_.g_w, codec_config_.g_h); |
| if (!status.is_ok()) { |
| std::move(done_cb).Run(status); |
| return; |
| } |
| if (fmt == VPX_IMG_FMT_NV12) { |
| vpx_image_.planes[VPX_PLANE_Y] = |
| const_cast<uint8_t*>(frame->visible_data(VideoFrame::kYPlane)); |
| vpx_image_.planes[VPX_PLANE_U] = |
| const_cast<uint8_t*>(frame->visible_data(VideoFrame::kUVPlane)); |
| // In NV12 Y and U samples are combined in one plane (bytes go YUYUYU), |
| // but libvpx treats them as two planes with the same stride but shifted |
| // by one byte. |
| vpx_image_.planes[VPX_PLANE_V] = vpx_image_.planes[VPX_PLANE_U] + 1; |
| vpx_image_.stride[VPX_PLANE_Y] = frame->stride(VideoFrame::kYPlane); |
| vpx_image_.stride[VPX_PLANE_U] = frame->stride(VideoFrame::kUVPlane); |
| vpx_image_.stride[VPX_PLANE_V] = frame->stride(VideoFrame::kUVPlane); |
| } else { |
| vpx_image_.planes[VPX_PLANE_Y] = |
| const_cast<uint8_t*>(frame->visible_data(VideoFrame::kYPlane)); |
| vpx_image_.planes[VPX_PLANE_U] = |
| const_cast<uint8_t*>(frame->visible_data(VideoFrame::kUPlane)); |
| vpx_image_.planes[VPX_PLANE_V] = |
| const_cast<uint8_t*>(frame->visible_data(VideoFrame::kVPlane)); |
| vpx_image_.stride[VPX_PLANE_Y] = frame->stride(VideoFrame::kYPlane); |
| vpx_image_.stride[VPX_PLANE_U] = frame->stride(VideoFrame::kUPlane); |
| vpx_image_.stride[VPX_PLANE_V] = frame->stride(VideoFrame::kVPlane); |
| } |
| break; |
| } |
| |
| // Use zero as a timestamp, so encoder will not use it for rate control. |
| // In absence of timestamp libvpx uses duration. |
| constexpr auto timestamp_us = 0; |
| auto duration_us = GetFrameDuration(*frame).InMicroseconds(); |
| last_frame_timestamp_ = frame->timestamp(); |
| auto deadline = VPX_DL_REALTIME; |
| vpx_codec_flags_t flags = key_frame ? VPX_EFLAG_FORCE_KF : 0; |
| |
| int temporal_id = 0; |
| if (codec_config_.ts_number_layers > 1) { |
| if (key_frame) |
| temporal_svc_frame_index = 0; |
| int index_in_temp_cycle = |
| temporal_svc_frame_index % codec_config_.ts_periodicity; |
| temporal_id = codec_config_.ts_layer_id[index_in_temp_cycle]; |
| temporal_svc_frame_index++; |
| |
| if (profile_ == VP8PROFILE_ANY) { |
| auto* vp8_layers_flags = codec_config_.ts_number_layers == 2 |
| ? vp8_2layers_temporal_flags |
| : vp8_3layers_temporal_flags; |
| flags |= vp8_layers_flags[index_in_temp_cycle]; |
| vpx_codec_control(codec_.get(), VP8E_SET_TEMPORAL_LAYER_ID, temporal_id); |
| } |
| } |
| |
| TRACE_EVENT0("media", "vpx_codec_encode"); |
| auto vpx_error = vpx_codec_encode(codec_.get(), &vpx_image_, timestamp_us, |
| duration_us, flags, deadline); |
| |
| if (vpx_error != VPX_CODEC_OK) { |
| std::string msg = base::StringPrintf("VPX encoding error: %s (%s)", |
| vpx_codec_err_to_string(vpx_error), |
| vpx_codec_error_detail(codec_.get())); |
| DLOG(ERROR) << msg; |
| Status status = Status(StatusCode::kEncoderFailedEncode, msg) |
| .WithData("vpx_error", vpx_error); |
| std::move(done_cb).Run(std::move(status)); |
| return; |
| } |
| |
| DrainOutputs(temporal_id, frame->timestamp()); |
| std::move(done_cb).Run(Status()); |
| } |
| |
| void VpxVideoEncoder::ChangeOptions(const Options& options, |
| OutputCB output_cb, |
| StatusCB done_cb) { |
| done_cb = BindToCurrentLoop(std::move(done_cb)); |
| if (!codec_) { |
| std::move(done_cb).Run(StatusCode::kEncoderInitializeNeverCompleted); |
| return; |
| } |
| |
| // Libvpx is very peculiar about encoded frame size changes, |
| // - VP8: As long as the frame area doesn't increase, internal codec |
| // structures don't need to be reallocated and codec can be simply |
| // reconfigured. |
| // - VP9: The codec cannot increase encoded width or height larger than their |
| // initial values. |
| // |
| // Mind the difference between old frame sizes: |
| // - |originally_configured_size_| is set only once when the vpx_codec_ctx_t |
| // is created. |
| // - |options_.frame_size| changes every time ChangeOptions() is called. |
| // More info can be found here: |
| // https://bugs.chromium.org/p/webm/issues/detail?id=1642 |
| // https://bugs.chromium.org/p/webm/issues/detail?id=912 |
| if (profile_ == VP8PROFILE_ANY) { |
| // VP8 resize restrictions |
| auto old_area = originally_configured_size_.GetCheckedArea(); |
| auto new_area = options.frame_size.GetCheckedArea(); |
| DCHECK(old_area.IsValid()); |
| if (!new_area.IsValid() || new_area.ValueOrDie() > old_area.ValueOrDie()) { |
| auto status = Status( |
| StatusCode::kEncoderUnsupportedConfig, |
| "libvpx/VP8 doesn't support dynamically increasing frame area"); |
| std::move(done_cb).Run(std::move(status)); |
| return; |
| } |
| } else { |
| // VP9 resize restrictions |
| if (options.frame_size.width() > originally_configured_size_.width() || |
| options.frame_size.height() > originally_configured_size_.height()) { |
| auto status = Status( |
| StatusCode::kEncoderUnsupportedConfig, |
| "libvpx/VP9 doesn't support dynamically increasing frame dimentions"); |
| std::move(done_cb).Run(std::move(status)); |
| return; |
| } |
| } |
| |
| vpx_codec_enc_cfg_t new_config = codec_config_; |
| auto status = SetUpVpxConfig(options, &new_config); |
| if (!status.is_ok()) { |
| std::move(done_cb).Run(status); |
| return; |
| } |
| |
| status = ReallocateVpxImageIfNeeded(&vpx_image_, vpx_image_.fmt, |
| options.frame_size.width(), |
| options.frame_size.height()); |
| if (!status.is_ok()) { |
| std::move(done_cb).Run(status); |
| return; |
| } |
| |
| auto vpx_error = vpx_codec_enc_config_set(codec_.get(), &new_config); |
| if (vpx_error == VPX_CODEC_OK) { |
| codec_config_ = new_config; |
| options_ = options; |
| if (!output_cb.is_null()) |
| output_cb_ = BindToCurrentLoop(std::move(output_cb)); |
| } else { |
| status = Status(StatusCode::kEncoderUnsupportedConfig, |
| "Failed to set new VPX config") |
| .WithData("vpx_error", vpx_error); |
| } |
| |
| std::move(done_cb).Run(std::move(status)); |
| } |
| |
| base::TimeDelta VpxVideoEncoder::GetFrameDuration(const VideoFrame& frame) { |
| // Frame has duration in metadata, use it. |
| if (frame.metadata().frame_duration.has_value()) |
| return frame.metadata().frame_duration.value(); |
| |
| // Options have framerate specified, use it. |
| if (options_.framerate.has_value()) |
| return base::Seconds(1.0 / options_.framerate.value()); |
| |
| // No real way to figure out duration, use time passed since the last frame |
| // as an educated guess, but clamp it within a reasonable limits. |
| constexpr auto min_duration = base::Seconds(1.0 / 60.0); |
| constexpr auto max_duration = base::Seconds(1.0 / 24.0); |
| auto duration = frame.timestamp() - last_frame_timestamp_; |
| return base::clamp(duration, min_duration, max_duration); |
| } |
| |
| VpxVideoEncoder::~VpxVideoEncoder() { |
| if (!codec_) |
| return; |
| |
| // It's safe to call vpx_img_free, even if vpx_image_ has never been |
| // initialized. vpx_img_free is not going to deallocate the vpx_image_ |
| // itself, only internal buffers. |
| vpx_img_free(&vpx_image_); |
| } |
| |
| void VpxVideoEncoder::Flush(StatusCB done_cb) { |
| done_cb = BindToCurrentLoop(std::move(done_cb)); |
| if (!codec_) { |
| std::move(done_cb).Run(StatusCode::kEncoderInitializeNeverCompleted); |
| return; |
| } |
| |
| auto vpx_error = vpx_codec_encode(codec_.get(), nullptr, -1, 0, 0, 0); |
| if (vpx_error != VPX_CODEC_OK) { |
| std::string msg = base::StringPrintf("VPX flushing error: %s (%s)", |
| vpx_codec_err_to_string(vpx_error), |
| vpx_codec_error_detail(codec_.get())); |
| DLOG(ERROR) << msg; |
| Status status = Status(StatusCode::kEncoderFailedEncode, msg) |
| .WithData("vpx_error", vpx_error); |
| std::move(done_cb).Run(std::move(status)); |
| return; |
| } |
| DrainOutputs(0, base::TimeDelta()); |
| std::move(done_cb).Run(Status()); |
| } |
| |
| void VpxVideoEncoder::DrainOutputs(int temporal_id, base::TimeDelta ts) { |
| vpx_codec_iter_t iter = nullptr; |
| const vpx_codec_cx_pkt_t* pkt = nullptr; |
| while ((pkt = vpx_codec_get_cx_data(codec_.get(), &iter))) { |
| if (pkt->kind == VPX_CODEC_CX_FRAME_PKT) { |
| VideoEncoderOutput result; |
| result.key_frame = (pkt->data.frame.flags & VPX_FRAME_IS_KEY) != 0; |
| |
| if (result.key_frame) { |
| // If we got an unexpected key frame, temporal_svc_frame_index needs to |
| // be adjusted, because the next frame should have index 1. |
| temporal_svc_frame_index = 1; |
| result.temporal_id = 0; |
| } else { |
| result.temporal_id = temporal_id; |
| } |
| |
| // We don't given timestamps to vpx_codec_encode() that's why |
| // pkt->data.frame.pts can't be used here. |
| result.timestamp = ts; |
| result.size = pkt->data.frame.sz; |
| result.data.reset(new uint8_t[result.size]); |
| memcpy(result.data.get(), pkt->data.frame.buf, result.size); |
| output_cb_.Run(std::move(result), {}); |
| } |
| } |
| } |
| |
| } // namespace media |
