blob: 2156df03ee6e7f4094f4bc243ae15071da280bc2 [file] [log] [blame]
// Copyright (c) 2012 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 <list>
#include <memory>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/sequence_checker.h"
#include "media/base/supported_video_decoder_config.h"
#include "media/base/video_decoder.h"
#include "media/base/video_decoder_config.h"
#include "media/base/video_frame_pool.h"
#include "media/ffmpeg/ffmpeg_deleters.h"
struct AVCodecContext;
struct AVFrame;
namespace media {
class DecoderBuffer;
class FFmpegDecodingLoop;
class MediaLog;
class MEDIA_EXPORT FFmpegVideoDecoder : public VideoDecoder {
static bool IsCodecSupported(VideoCodec codec);
static SupportedVideoDecoderConfigs SupportedConfigsForWebRTC();
explicit FFmpegVideoDecoder(MediaLog* media_log);
FFmpegVideoDecoder(const FFmpegVideoDecoder&) = delete;
FFmpegVideoDecoder& operator=(const FFmpegVideoDecoder&) = delete;
~FFmpegVideoDecoder() override;
// Allow decoding of individual NALU. Entire frames are required by default.
// Disables low-latency mode. Must be called before Initialize().
void set_decode_nalus(bool decode_nalus) { decode_nalus_ = decode_nalus; }
// VideoDecoder implementation.
VideoDecoderType GetDecoderType() const override;
void Initialize(const VideoDecoderConfig& config,
bool low_delay,
CdmContext* cdm_context,
InitCB init_cb,
const OutputCB& output_cb,
const WaitingCB& waiting_cb) override;
void Decode(scoped_refptr<DecoderBuffer> buffer, DecodeCB decode_cb) override;
void Reset(base::OnceClosure closure) override;
// Callback called from within FFmpeg to allocate a buffer based on
// the dimensions of |codec_context|. See AVCodecContext.get_buffer2
// documentation inside FFmpeg.
int GetVideoBuffer(struct AVCodecContext* codec_context,
AVFrame* frame,
int flags);
void force_allocation_error_for_testing() { force_allocation_error_ = true; }
enum class DecoderState { kUninitialized, kNormal, kDecodeFinished, kError };
// Handles decoding of an unencrypted encoded buffer. A return value of false
// indicates that an error has occurred.
bool FFmpegDecode(const DecoderBuffer& buffer);
bool OnNewFrame(AVFrame* frame);
// Handles (re-)initializing the decoder with a (new) config.
// Returns true if initialization was successful.
bool ConfigureDecoder(const VideoDecoderConfig& config, bool low_delay);
// Releases resources associated with |codec_context_|.
void ReleaseFFmpegResources();
MediaLog* const media_log_;
DecoderState state_ = DecoderState::kUninitialized;
OutputCB output_cb_;
// FFmpeg structures owned by this object.
std::unique_ptr<AVCodecContext, ScopedPtrAVFreeContext> codec_context_;
VideoDecoderConfig config_;
VideoFramePool frame_pool_;
bool decode_nalus_ = false;
bool force_allocation_error_ = false;
std::unique_ptr<FFmpegDecodingLoop> decoding_loop_;
} // namespace media