cdm_video_decoder.cc | Explore in Territory

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "media/cdm/library_cdm/clear_key_cdm/cdm_video_decoder.h"

#include <memory>
#include <optional>
#include <utility>

#include "base/command_line.h"
#include "base/containers/queue.h"
#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/no_destructor.h"
#include "base/task/single_thread_task_runner.h"
#include "build/build_config.h"
// Necessary to convert async media::VideoDecoder to sync CdmVideoDecoder.
// Typically not recommended for production code, but is ok here since
// ClearKeyCdm is only for testing.
#include "base/run_loop.h"
#include "base/task/single_thread_task_executor.h"
#include "media/base/decoder_status.h"
#include "media/base/media_switches.h"
#include "media/base/media_util.h"
#include "media/cdm/cdm_type_conversion.h"
#include "media/cdm/library_cdm/cdm_host_proxy.h"
#include "media/media_buildflags.h"
#include "third_party/libyuv/include/libyuv/planar_functions.h"

#if BUILDFLAG(ENABLE_LIBVPX)
#include "media/filters/vpx_video_decoder.h"
#endif

#if BUILDFLAG(ENABLE_DAV1D_DECODER)
#include "media/filters/dav1d_video_decoder.h"
#endif

#if BUILDFLAG(ENABLE_FFMPEG_VIDEO_DECODERS)
#include "media/filters/ffmpeg_video_decoder.h"
#endif

namespace media {

namespace {

media::VideoDecoderConfig ToClearMediaVideoDecoderConfig(
    const cdm::VideoDecoderConfig_3& config) { … }

bool ToCdmVideoFrame(const VideoFrame& video_frame,
                     CdmHostProxy* cdm_host_proxy,
                     CdmVideoDecoder::CdmVideoFrame* cdm_video_frame) { … }

// Media VideoDecoders typically assumes a global environment where a lot of
// things are already setup in the process,
// e.g. base::SingleThreadTaskRunnerCurrentDefautHandle and
// base::CommandLine. These will be available in the component build because the
// CDM and the host is depending on the same base/ target. In static build, they
// will not be available and we have to setup it by ourselves.
void SetupGlobalEnvironmentIfNeeded() { … }

// Adapts a media::VideoDecoder to a CdmVideoDecoder. Media VideoDecoders
// operations are asynchronous, often posting callbacks to the task runner. The
// CdmVideoDecoder operations are synchronous. Therefore, after calling
// media::VideoDecoder, we need to run a RunLoop manually and wait for the
// asynchronous operation to finish. The RunLoop must be of type
// |kNestableTasksAllowed| because we could be running the RunLoop in a task,
// e.g. in component builds when we share the same task runner as the host. In
// a static build, this is not necessary.
class VideoDecoderAdapter final : public CdmVideoDecoder { … };

}  // namespace

std::unique_ptr<CdmVideoDecoder> CreateVideoDecoder(
    CdmHostProxy* cdm_host_proxy,
    const cdm::VideoDecoderConfig_3& config) { … }

}  // namespace media
chromium/media/cdm/library_cdm/clear_key_cdm/cdm_video_decoder.cc
