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[media] Support decode-to-texture mode
Bring up decode-to-texture mode on Chrobalt. b/375070492
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| // Copyright 2018 The Cobalt Authors. All Rights Reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| #ifndef MEDIA_STARBOARD_DECODE_TARGET_PROVIDER_H_ | ||
| #define MEDIA_STARBOARD_DECODE_TARGET_PROVIDER_H_ | ||
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| #include "base/functional/callback.h" | ||
| #include "base/memory/ref_counted.h" | ||
| #include "base/synchronization/lock.h" | ||
| #include "base/time/time.h" | ||
| #include "starboard/decode_target.h" | ||
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| namespace media { | ||
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| // The DecodeTargetProvider manages the backlog for video frames. It has the | ||
| // following functionalities: | ||
| // 1. It caches the video frames ready to be displayed. | ||
| // 2. It decides which frame to be displayed at the current time. | ||
| // 3. It removes frames that will no longer be displayed. | ||
| class DecodeTargetProvider | ||
| : public base::RefCountedThreadSafe<DecodeTargetProvider> { | ||
| public: | ||
| enum OutputMode { | ||
| kOutputModePunchOut, | ||
| kOutputModeDecodeToTexture, | ||
| kOutputModeInvalid, | ||
| }; | ||
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| DecodeTargetProvider() : output_mode_(kOutputModeInvalid) {} | ||
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| DecodeTargetProvider(const DecodeTargetProvider&) = delete; | ||
| DecodeTargetProvider& operator=(const DecodeTargetProvider&) = delete; | ||
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| using GetCurrentSbDecodeTargetFunction = | ||
| base::RepeatingCallback<SbDecodeTarget()>; | ||
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| void SetOutputMode(OutputMode output_mode) { | ||
| base::AutoLock auto_lock(lock_); | ||
| output_mode_ = output_mode; | ||
| } | ||
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| DecodeTargetProvider::OutputMode GetOutputMode() const { | ||
| base::AutoLock auto_lock(lock_); | ||
| return output_mode_; | ||
| } | ||
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| // For Starboard platforms that have a decode-to-texture player, we enable | ||
| // this DecodeTargetProvider to act as a bridge for Cobalt code to query | ||
| // for the current SbDecodeTarget. In effect, we bypass all of | ||
| // DecodeTargetProvider's logic in this case, instead relying on the | ||
| // Starboard implementation to provide us with the current video frame when | ||
| // needed. | ||
| void SetGetCurrentSbDecodeTargetFunction( | ||
| GetCurrentSbDecodeTargetFunction function) { | ||
| base::AutoLock auto_lock(lock_); | ||
| get_current_sb_decode_target_function_ = function; | ||
| } | ||
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| void ResetGetCurrentSbDecodeTargetFunction() { | ||
| base::AutoLock auto_lock(lock_); | ||
| get_current_sb_decode_target_function_.Reset(); | ||
| } | ||
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| SbDecodeTarget GetCurrentSbDecodeTarget() const { | ||
| base::AutoLock auto_lock(lock_); | ||
| if (get_current_sb_decode_target_function_.is_null()) { | ||
| return kSbDecodeTargetInvalid; | ||
| } else { | ||
| return get_current_sb_decode_target_function_.Run(); | ||
| } | ||
| } | ||
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| private: | ||
| mutable base::Lock lock_; | ||
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| OutputMode output_mode_; | ||
| GetCurrentSbDecodeTargetFunction get_current_sb_decode_target_function_; | ||
| }; | ||
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| } // namespace media | ||
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| #endif // MEDIA_STARBOARD_DECODE_TARGET_PROVIDER_H_ |
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