Index: media/filters/vp9_parser.h |
diff --git a/media/filters/vp9_parser.h b/media/filters/vp9_parser.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e035033a794bd6a180d77dbad42847558d2b443a |
--- /dev/null |
+++ b/media/filters/vp9_parser.h |
@@ -0,0 +1,188 @@ |
+// Copyright 2015 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. |
+ |
+#ifndef MEDIA_FILTERS_VP9_PARSER_H_ |
+#define MEDIA_FILTERS_VP9_PARSER_H_ |
+ |
+#include <stddef.h> |
+#include <stdint.h> |
+ |
+#include "base/macros.h" |
+#include "media/base/media_export.h" |
+#include "media/filters/vp9_raw_bits_reader.h" |
+ |
+namespace media { |
+ |
+const int kVp9MaxProfile = 4; |
+const int kVp9RefFramesLog2 = 3; |
+const int kVp9RefFrames = 1 << kVp9RefFramesLog2; |
+const uint8_t kVp9MaxProb = 255; |
+const int kVp9RefsPerFrame = 3; |
Pawel Osciak
2015/07/30 11:52:31
kVp9NumRefFrames
kcwu1
2015/07/31 04:36:02
Ok, I changed the name
kVp9RefFrames -> kVp9NumRef
|
+ |
+enum class Vp9ColorSpace { |
+ UNKNOWN, |
+ BT_601, |
Pawel Osciak
2015/07/30 08:27:38
We should assign explicit values since this is per
kcwu1
2015/07/31 04:36:02
Done.
|
+ BT_709, |
+ SMPTE_170, |
+ SMPTE_240, |
+ BT_2020, |
+ RESERVED, |
+ SRGB, |
+}; |
+ |
+enum class Vp9InterpFilter { |
+ INTERP_FILTER_SELECT, |
+ EIGHTTAP_SMOOTH, |
+ EIGHTTAP, |
+ EIGHTTAP_SHARP, |
+ BILINEAR, |
+}; |
+ |
+struct MEDIA_EXPORT Vp9Segmentation { |
+ static const int kNumSegment = 8; |
Pawel Osciak
2015/07/30 08:27:38
kNumSegments
kcwu1
2015/07/31 04:36:02
Done.
|
+ static const int kTreeProbs = kNumSegment - 1; |
Pawel Osciak
2015/07/30 08:27:38
kNumTreeProbs
kcwu1
2015/07/31 04:36:02
Done.
|
+ static const int kPredictionProbs = 3; |
Pawel Osciak
2015/07/30 08:27:38
kNumPredictionProbs
kcwu1
2015/07/31 04:36:02
Done.
|
+ static const int kNumFeature = 4; |
+ |
+ bool enabled; |
+ |
+ bool update_map; |
+ uint8_t tree_probs[kTreeProbs]; |
+ uint8_t pred_probs[kPredictionProbs]; |
+ |
+ bool update_data; |
+ bool abs_delta; |
+ bool feature_enabled[kNumSegment][kNumFeature]; |
+ int8_t feature_data[kNumSegment][kNumFeature]; |
+}; |
+ |
+struct MEDIA_EXPORT Vp9LoopFilter { |
+ static const int kNumRefDeltas = 4; |
+ static const int kNumModeDeltas = 2; |
+ |
+ uint8_t filter_level; |
+ uint8_t sharpness_level; |
+ |
+ bool mode_ref_delta_enabled; |
+ bool mode_ref_delta_update; |
+ bool update_ref_deltas[kNumRefDeltas]; |
+ int8_t ref_deltas[kNumRefDeltas]; |
+ bool update_mode_deltas[kNumModeDeltas]; |
+ int8_t mode_deltas[kNumModeDeltas]; |
+}; |
+ |
+struct MEDIA_EXPORT Vp9QuantizationParams { |
+ bool IsLossless() const { |
+ return base_qindex == 0 && y_dc_delta == 0 && uv_dc_delta == 0; |
Pawel Osciak
2015/07/30 11:52:31
Do we need && uv_ac_delta_q == 0 here as well?
kcwu1
2015/07/31 04:36:02
Done.
|
+ } |
+ |
+ uint8_t base_qindex; |
+ int8_t y_dc_delta; |
+ int8_t uv_dc_delta; |
+ int8_t uv_ac_delta; |
+}; |
+ |
+// VP9 frame header. |
+struct MEDIA_EXPORT Vp9FrameHeader { |
+ enum FrameType { |
+ KEYFRAME, |
Pawel Osciak
2015/07/30 08:27:38
Explicit values please.
kcwu1
2015/07/31 04:36:02
Done.
|
+ INTERFRAME, |
+ }; |
+ |
+ bool IsKeyframe() const { return frame_type == KEYFRAME; } |
+ |
+ uint8_t profile; |
+ |
+ bool show_existing_frame; |
+ uint8_t frame_to_show; |
+ |
+ enum FrameType frame_type; |
Pawel Osciak
2015/07/30 08:27:38
s/enum//
kcwu1
2015/07/31 04:36:02
Done.
|
+ |
+ bool show_frame; |
+ bool error_resilient_mode; |
+ |
+ uint8_t bit_depth; |
+ enum Vp9ColorSpace color_space; |
+ bool yuv_range; |
+ uint8_t subsampling_x; |
+ uint8_t subsampling_y; |
+ |
+ // The range of width and height is 1..2^16. |
+ uint32_t width; |
+ uint32_t height; |
+ uint32_t display_width; |
+ uint32_t display_height; |
+ |
+ bool intra_only; |
+ uint8_t reset_context; |
+ bool refresh_flag[kVp9RefFrames]; |
+ uint8_t frame_refs[kVp9RefsPerFrame]; |
+ bool ref_sign_biases[kVp9RefsPerFrame]; |
+ bool allow_high_precision_mv; |
+ enum Vp9InterpFilter interp_filter; |
+ |
+ bool refresh_frame_context; |
+ bool frame_parallel_decoding_mode; |
+ uint8_t frame_context_idx; |
+ |
+ Vp9LoopFilter loop_filter; |
+ Vp9QuantizationParams quant_params; |
+ Vp9Segmentation segment; |
+ |
+ uint8_t log2_tile_cols; |
+ uint8_t log2_tile_rows; |
+ |
+ // If parsing out of order and |frame_type| is INTERFRAME, the value of |
+ // |first_partition_size| and |compressed_header| may be invalid. |
+ uint16_t first_partition_size; |
+ const uint8_t* compressed_header; |
+}; |
+ |
+class MEDIA_EXPORT Vp9Parser { |
+ public: |
+ Vp9Parser(); |
+ |
+ // Parses one frame. |
+ // If parsing out of order (say, frame skip or seek), it still returns |
+ // true for interframes but |fhdr| fields refering to previous frames |
+ // will be undefined until next keyframe. |
+ // ??? Do we need to support such case? Or should we check sizes strictly? |
+ bool ParseFrame(const uint8_t* ptr, size_t size, Vp9FrameHeader* fhdr); |
+ |
+ private: |
+ struct ReferenceSlot { |
+ bool used; |
+ uint32_t width; |
+ uint32_t height; |
+ }; |
+ |
+ uint8_t ReadProfile(); |
+ bool VerifySyncCode(); |
+ bool ReadBitDepthColorSpaceSampling(Vp9FrameHeader* fhdr); |
+ void ReadFrameSize(Vp9FrameHeader* fhdr); |
+ void ReadFrameSizeFromRefs(Vp9FrameHeader* fhdr); |
+ void ReadDisplayFrameSize(Vp9FrameHeader* fhdr); |
+ Vp9InterpFilter ReadInterpFilter(); |
+ void ReadLoopFilter(Vp9LoopFilter* loop_filter); |
+ void ReadQuantization(Vp9QuantizationParams* quants); |
+ void ReadSegmentationMap(Vp9Segmentation* segment); |
+ void ReadSegmentationData(Vp9Segmentation* segment); |
+ void ReadSegmentation(Vp9Segmentation* segment); |
+ bool ParseUncompressedHeader(Vp9FrameHeader* fhdr); |
+ void ReadTiles(Vp9FrameHeader* fhdr); |
+ void UpdateSlots(Vp9FrameHeader* fhdr); |
+ |
+ const uint8_t* stream_; |
+ size_t size_; |
+ Vp9RawBitsReader reader_; |
+ |
+ // The parsing context to keep track references. |
+ ReferenceSlot ref_slots_[kVp9RefFrames]; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(Vp9Parser); |
+}; |
+ |
+} // namespace media |
+ |
+#endif // MEDIA_FILTERS_VP9_PARSER_H_ |