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// 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIA_WEB_SOURCE_BUFFER_IMPL_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIA_WEB_SOURCE_BUFFER_IMPL_H_
#include <stddef.h>
#include <memory>
#include <string>
#include "base/compiler_specific.h"
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "media/base/stream_parser.h"
#include "third_party/blink/public/platform/web_source_buffer.h"
#include "third_party/blink/renderer/platform/platform_export.h"
namespace media {
class ChunkDemuxer;
class MediaTracks;
enum class SourceBufferParseWarning;
} // namespace media
namespace blink {
class PLATFORM_EXPORT WebSourceBufferImpl : public WebSourceBuffer {
public:
WebSourceBufferImpl(const std::string& id, media::ChunkDemuxer* demuxer);
WebSourceBufferImpl(const WebSourceBufferImpl&) = delete;
WebSourceBufferImpl& operator=(const WebSourceBufferImpl&) = delete;
~WebSourceBufferImpl() override;
// WebSourceBuffer implementation.
void SetClient(WebSourceBufferClient* client) override;
bool GetGenerateTimestampsFlag() override;
bool SetMode(AppendMode mode) override;
WebTimeRanges Buffered() override;
double HighestPresentationTimestamp() override;
bool EvictCodedFrames(double currentPlaybackTime,
size_t newDataSize) override;
[[nodiscard]] bool AppendToParseBuffer(
base::span<const unsigned char> data) override;
[[nodiscard]] media::StreamParser::ParseStatus RunSegmentParserLoop(
double* timestamp_offset) override;
bool AppendChunks(
std::unique_ptr<media::StreamParser::BufferQueue> buffer_queue,
double* timestamp_offset) override;
void ResetParserState() override;
void Remove(double start, double end) override;
bool CanChangeType(const WebString& content_type,
const WebString& codecs) override;
void ChangeType(const WebString& content_type,
const WebString& codecs) override;
bool SetTimestampOffset(double offset) override;
void SetAppendWindowStart(double start) override;
void SetAppendWindowEnd(double end) override;
void RemovedFromMediaSource() override;
private:
// Demuxer callback handler to process an initialization segment received
// during an append() call.
void InitSegmentReceived(std::unique_ptr<media::MediaTracks> tracks);
// Demuxer callback handler to notify Blink of a non-fatal parse warning.
void NotifyParseWarning(const media::SourceBufferParseWarning warning);
std::string id_;
// Owned by WebMediaPlayerImpl.
raw_ptr<media::ChunkDemuxer, DanglingUntriaged> demuxer_;
raw_ptr<WebSourceBufferClient> client_;
// Controls the offset applied to timestamps when processing appended media
// segments. It is initially 0, which indicates that no offset is being
// applied. Both setTimestampOffset() and append() may update this value.
base::TimeDelta timestamp_offset_;
base::TimeDelta append_window_start_;
base::TimeDelta append_window_end_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIA_WEB_SOURCE_BUFFER_IMPL_H_
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