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-rw-r--r--vda/vp8_parser.cc876
1 files changed, 876 insertions, 0 deletions
diff --git a/vda/vp8_parser.cc b/vda/vp8_parser.cc
new file mode 100644
index 0000000..46eb669
--- /dev/null
+++ b/vda/vp8_parser.cc
@@ -0,0 +1,876 @@
+// 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.
+//
+// This file contains an implementation of a VP8 raw stream parser,
+// as defined in RFC 6386.
+
+#include "base/logging.h"
+#include "vp8_parser.h"
+
+namespace media {
+
+#define ERROR_RETURN(what) \
+ do { \
+ DVLOG(1) << "Error while trying to read " #what; \
+ return false; \
+ } while (0)
+
+#define BD_READ_BOOL_OR_RETURN(out) \
+ do { \
+ if (!bd_.ReadBool(out)) \
+ ERROR_RETURN(out); \
+ } while (0)
+
+#define BD_READ_BOOL_WITH_PROB_OR_RETURN(out, prob) \
+ do { \
+ if (!bd_.ReadBool(out, prob)) \
+ ERROR_RETURN(out); \
+ } while (0)
+
+#define BD_READ_UNSIGNED_OR_RETURN(num_bits, out) \
+ do { \
+ int _out; \
+ if (!bd_.ReadLiteral(num_bits, &_out)) \
+ ERROR_RETURN(out); \
+ *out = _out; \
+ } while (0)
+
+#define BD_READ_SIGNED_OR_RETURN(num_bits, out) \
+ do { \
+ int _out; \
+ if (!bd_.ReadLiteralWithSign(num_bits, &_out)) \
+ ERROR_RETURN(out); \
+ *out = _out; \
+ } while (0)
+
+Vp8FrameHeader::Vp8FrameHeader() {
+ memset(this, 0, sizeof(*this));
+}
+
+Vp8Parser::Vp8Parser() : stream_(nullptr), bytes_left_(0) {
+}
+
+Vp8Parser::~Vp8Parser() {
+}
+
+bool Vp8Parser::ParseFrame(const uint8_t* ptr,
+ size_t frame_size,
+ Vp8FrameHeader* fhdr) {
+ stream_ = ptr;
+ bytes_left_ = frame_size;
+
+ memset(fhdr, 0, sizeof(*fhdr));
+ fhdr->data = stream_;
+ fhdr->frame_size = bytes_left_;
+
+ if (!ParseFrameTag(fhdr))
+ return false;
+
+ fhdr->first_part_offset = stream_ - fhdr->data;
+
+ if (!ParseFrameHeader(fhdr))
+ return false;
+
+ if (!ParsePartitions(fhdr))
+ return false;
+
+ DVLOG(4) << "Frame parsed, start: " << static_cast<const void*>(ptr)
+ << ", size: " << frame_size
+ << ", offsets: to first_part=" << fhdr->first_part_offset
+ << ", to macroblock data (in bits)=" << fhdr->macroblock_bit_offset;
+
+ return true;
+}
+
+static inline uint32_t GetBitsAt(uint32_t data, size_t shift, size_t num_bits) {
+ return ((data >> shift) & ((1 << num_bits) - 1));
+}
+
+bool Vp8Parser::ParseFrameTag(Vp8FrameHeader* fhdr) {
+ const size_t kFrameTagSize = 3;
+ if (bytes_left_ < kFrameTagSize)
+ return false;
+
+ uint32_t frame_tag = (stream_[2] << 16) | (stream_[1] << 8) | stream_[0];
+ fhdr->key_frame =
+ static_cast<Vp8FrameHeader::FrameType>(GetBitsAt(frame_tag, 0, 1));
+ fhdr->version = GetBitsAt(frame_tag, 1, 2);
+ fhdr->is_experimental = !!GetBitsAt(frame_tag, 3, 1);
+ fhdr->show_frame =!!GetBitsAt(frame_tag, 4, 1);
+ fhdr->first_part_size = GetBitsAt(frame_tag, 5, 19);
+
+ stream_ += kFrameTagSize;
+ bytes_left_ -= kFrameTagSize;
+
+ if (fhdr->IsKeyframe()) {
+ const size_t kKeyframeTagSize = 7;
+ if (bytes_left_ < kKeyframeTagSize)
+ return false;
+
+ static const uint8_t kVp8StartCode[] = {0x9d, 0x01, 0x2a};
+ if (memcmp(stream_, kVp8StartCode, sizeof(kVp8StartCode)) != 0)
+ return false;
+
+ stream_ += sizeof(kVp8StartCode);
+ bytes_left_ -= sizeof(kVp8StartCode);
+
+ uint16_t data = (stream_[1] << 8) | stream_[0];
+ fhdr->width = data & 0x3fff;
+ fhdr->horizontal_scale = data >> 14;
+
+ data = (stream_[3] << 8) | stream_[2];
+ fhdr->height = data & 0x3fff;
+ fhdr->vertical_scale = data >> 14;
+
+ stream_ += 4;
+ bytes_left_ -= 4;
+ }
+
+ return true;
+}
+
+bool Vp8Parser::ParseFrameHeader(Vp8FrameHeader* fhdr) {
+ if (!bd_.Initialize(stream_, bytes_left_))
+ return false;
+
+ bool keyframe = fhdr->IsKeyframe();
+ if (keyframe) {
+ unsigned int data;
+ BD_READ_UNSIGNED_OR_RETURN(1, &data); // color_space
+ BD_READ_UNSIGNED_OR_RETURN(1, &data); // clamping_type
+ }
+
+ if (!ParseSegmentationHeader(keyframe))
+ return false;
+
+ fhdr->segmentation_hdr = curr_segmentation_hdr_;
+
+ if (!ParseLoopFilterHeader(keyframe))
+ return false;
+
+ fhdr->loopfilter_hdr = curr_loopfilter_hdr_;
+
+ int log2_nbr_of_dct_partitions;
+ BD_READ_UNSIGNED_OR_RETURN(2, &log2_nbr_of_dct_partitions);
+ fhdr->num_of_dct_partitions = static_cast<size_t>(1)
+ << log2_nbr_of_dct_partitions;
+
+ if (!ParseQuantizationHeader(&fhdr->quantization_hdr))
+ return false;
+
+ if (keyframe) {
+ BD_READ_BOOL_OR_RETURN(&fhdr->refresh_entropy_probs);
+ } else {
+ BD_READ_BOOL_OR_RETURN(&fhdr->refresh_golden_frame);
+ BD_READ_BOOL_OR_RETURN(&fhdr->refresh_alternate_frame);
+
+ int refresh_mode;
+ if (!fhdr->refresh_golden_frame) {
+ BD_READ_UNSIGNED_OR_RETURN(2, &refresh_mode);
+ fhdr->copy_buffer_to_golden =
+ static_cast<Vp8FrameHeader::GoldenRefreshMode>(refresh_mode);
+ }
+
+ if (!fhdr->refresh_alternate_frame) {
+ BD_READ_UNSIGNED_OR_RETURN(2, &refresh_mode);
+ fhdr->copy_buffer_to_alternate =
+ static_cast<Vp8FrameHeader::AltRefreshMode>(refresh_mode);
+ }
+
+ BD_READ_UNSIGNED_OR_RETURN(1, &fhdr->sign_bias_golden);
+ BD_READ_UNSIGNED_OR_RETURN(1, &fhdr->sign_bias_alternate);
+ BD_READ_BOOL_OR_RETURN(&fhdr->refresh_entropy_probs);
+ BD_READ_BOOL_OR_RETURN(&fhdr->refresh_last);
+ }
+
+ if (keyframe)
+ ResetProbs();
+
+ fhdr->entropy_hdr = curr_entropy_hdr_;
+
+ if (!ParseTokenProbs(&fhdr->entropy_hdr, fhdr->refresh_entropy_probs))
+ return false;
+
+ BD_READ_BOOL_OR_RETURN(&fhdr->mb_no_skip_coeff);
+ if (fhdr->mb_no_skip_coeff)
+ BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_skip_false);
+
+ if (!keyframe) {
+ BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_intra);
+ BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_last);
+ BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_gf);
+ }
+
+ if (!ParseIntraProbs(&fhdr->entropy_hdr, fhdr->refresh_entropy_probs,
+ keyframe))
+ return false;
+
+ if (!keyframe) {
+ if (!ParseMVProbs(&fhdr->entropy_hdr, fhdr->refresh_entropy_probs))
+ return false;
+ }
+
+ fhdr->macroblock_bit_offset = bd_.BitOffset();
+ fhdr->bool_dec_range = bd_.GetRange();
+ fhdr->bool_dec_value = bd_.GetBottom();
+ fhdr->bool_dec_count = 7 - (bd_.BitOffset() + 7) % 8;
+
+ return true;
+}
+
+bool Vp8Parser::ParseSegmentationHeader(bool keyframe) {
+ Vp8SegmentationHeader* shdr = &curr_segmentation_hdr_;
+
+ if (keyframe)
+ memset(shdr, 0, sizeof(*shdr));
+
+ BD_READ_BOOL_OR_RETURN(&shdr->segmentation_enabled);
+ if (!shdr->segmentation_enabled)
+ return true;
+
+ BD_READ_BOOL_OR_RETURN(&shdr->update_mb_segmentation_map);
+ BD_READ_BOOL_OR_RETURN(&shdr->update_segment_feature_data);
+ if (shdr->update_segment_feature_data) {
+ int mode;
+ BD_READ_UNSIGNED_OR_RETURN(1, &mode);
+ shdr->segment_feature_mode =
+ static_cast<Vp8SegmentationHeader::SegmentFeatureMode>(mode);
+
+ for (size_t i = 0; i < kMaxMBSegments; ++i) {
+ bool quantizer_update;
+ BD_READ_BOOL_OR_RETURN(&quantizer_update);
+ if (quantizer_update)
+ BD_READ_SIGNED_OR_RETURN(7, &shdr->quantizer_update_value[i]);
+ else
+ shdr->quantizer_update_value[i] = 0;
+ }
+
+ for (size_t i = 0; i < kMaxMBSegments; ++i) {
+ bool loop_filter_update;
+ BD_READ_BOOL_OR_RETURN(&loop_filter_update);
+ if (loop_filter_update)
+ BD_READ_SIGNED_OR_RETURN(6, &shdr->lf_update_value[i]);
+ else
+ shdr->lf_update_value[i] = 0;
+ }
+ }
+
+ if (shdr->update_mb_segmentation_map) {
+ for (size_t i = 0; i < kNumMBFeatureTreeProbs; ++i) {
+ bool segment_prob_update;
+ BD_READ_BOOL_OR_RETURN(&segment_prob_update);
+ if (segment_prob_update)
+ BD_READ_UNSIGNED_OR_RETURN(8, &shdr->segment_prob[i]);
+ else
+ shdr->segment_prob[i] = Vp8SegmentationHeader::kDefaultSegmentProb;
+ }
+ }
+
+ return true;
+}
+
+bool Vp8Parser::ParseLoopFilterHeader(bool keyframe) {
+ Vp8LoopFilterHeader* lfhdr = &curr_loopfilter_hdr_;
+
+ if (keyframe)
+ memset(lfhdr, 0, sizeof(*lfhdr));
+
+ int type;
+ BD_READ_UNSIGNED_OR_RETURN(1, &type);
+ lfhdr->type = static_cast<Vp8LoopFilterHeader::Type>(type);
+ BD_READ_UNSIGNED_OR_RETURN(6, &lfhdr->level);
+ BD_READ_UNSIGNED_OR_RETURN(3, &lfhdr->sharpness_level);
+ BD_READ_BOOL_OR_RETURN(&lfhdr->loop_filter_adj_enable);
+
+ if (lfhdr->loop_filter_adj_enable) {
+ BD_READ_BOOL_OR_RETURN(&lfhdr->mode_ref_lf_delta_update);
+ if (lfhdr->mode_ref_lf_delta_update) {
+ for (size_t i = 0; i < kNumBlockContexts; ++i) {
+ bool ref_frame_delta_update_flag;
+ BD_READ_BOOL_OR_RETURN(&ref_frame_delta_update_flag);
+ if (ref_frame_delta_update_flag)
+ BD_READ_SIGNED_OR_RETURN(6, &lfhdr->ref_frame_delta[i]);
+ }
+
+ for (size_t i = 0; i < kNumBlockContexts; ++i) {
+ bool mb_mode_delta_update_flag;
+ BD_READ_BOOL_OR_RETURN(&mb_mode_delta_update_flag);
+ if (mb_mode_delta_update_flag)
+ BD_READ_SIGNED_OR_RETURN(6, &lfhdr->mb_mode_delta[i]);
+ }
+ }
+ }
+
+ return true;
+}
+
+bool Vp8Parser::ParseQuantizationHeader(Vp8QuantizationHeader* qhdr) {
+ // If any of the delta values is not present, the delta should be zero.
+ memset(qhdr, 0, sizeof(*qhdr));
+
+ BD_READ_UNSIGNED_OR_RETURN(7, &qhdr->y_ac_qi);
+
+ bool delta_present;
+
+ BD_READ_BOOL_OR_RETURN(&delta_present);
+ if (delta_present)
+ BD_READ_SIGNED_OR_RETURN(4, &qhdr->y_dc_delta);
+
+ BD_READ_BOOL_OR_RETURN(&delta_present);
+ if (delta_present)
+ BD_READ_SIGNED_OR_RETURN(4, &qhdr->y2_dc_delta);
+
+ BD_READ_BOOL_OR_RETURN(&delta_present);
+ if (delta_present)
+ BD_READ_SIGNED_OR_RETURN(4, &qhdr->y2_ac_delta);
+
+ BD_READ_BOOL_OR_RETURN(&delta_present);
+ if (delta_present)
+ BD_READ_SIGNED_OR_RETURN(4, &qhdr->uv_dc_delta);
+
+ BD_READ_BOOL_OR_RETURN(&delta_present);
+ if (delta_present)
+ BD_READ_SIGNED_OR_RETURN(4, &qhdr->uv_ac_delta);
+
+ return true;
+}
+
+// See spec for details on these values.
+const uint8_t kCoeffUpdateProbs[kNumBlockTypes][kNumCoeffBands]
+ [kNumPrevCoeffContexts][kNumEntropyNodes] = {
+ {
+ {
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255},
+ {249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255},
+ {234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255},
+ {250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255},
+ {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ },
+ {
+ {
+ {217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255},
+ {234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255},
+ },
+ {
+ {255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+ {250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ },
+ {
+ {
+ {186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255},
+ {234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255},
+ {251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255},
+ },
+ {
+ {255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ },
+ {
+ {
+ {248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255},
+ {248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+ {246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+ {252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255},
+ {248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+ {253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+ {252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+ {250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ {
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+ },
+ },
+};
+
+const uint8_t kKeyframeYModeProbs[kNumYModeProbs] = {145, 156, 163, 128};
+const uint8_t kKeyframeUVModeProbs[kNumUVModeProbs] = {142, 114, 183};
+
+const uint8_t kDefaultYModeProbs[kNumYModeProbs] = {112, 86, 140, 37};
+const uint8_t kDefaultUVModeProbs[kNumUVModeProbs] = {162, 101, 204};
+
+const uint8_t kDefaultCoeffProbs[kNumBlockTypes][kNumCoeffBands]
+ [kNumPrevCoeffContexts][kNumEntropyNodes] = {
+ {
+ {
+ {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+ {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+ {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+ },
+ {
+ {253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128},
+ {189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128},
+ {106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128},
+ },
+ {
+ { 1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128},
+ {181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128},
+ { 78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128},
+ },
+ {
+ { 1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128},
+ {184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128},
+ { 77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128},
+ },
+ {
+ { 1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128},
+ {170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128},
+ { 37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128},
+ },
+ {
+ { 1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128},
+ {207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128},
+ {102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128},
+ },
+ {
+ { 1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128},
+ {177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128},
+ { 80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128},
+ },
+ {
+ { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+ {246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+ {255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+ }
+ },
+ {
+ {
+ {198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62},
+ {131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1},
+ { 68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128},
+ },
+ {
+ { 1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128},
+ {184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128},
+ { 81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128},
+ },
+ {
+ { 1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128},
+ { 99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128},
+ { 23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128},
+ },
+ {
+ { 1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128},
+ {109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128},
+ { 44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128},
+ },
+ {
+ { 1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128},
+ { 94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128},
+ { 22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128},
+ },
+ {
+ { 1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128},
+ {124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128},
+ { 35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128},
+ },
+ {
+ { 1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128},
+ {121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128},
+ { 45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128},
+ },
+ {
+ { 1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128},
+ {203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128},
+ {137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128},
+ }
+ },
+ {
+ {
+ {253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128},
+ {175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128},
+ { 73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128},
+ },
+ {
+ { 1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128},
+ {239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128},
+ {155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128},
+ },
+ {
+ { 1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128},
+ {201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128},
+ { 69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128},
+ },
+ {
+ { 1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128},
+ {223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128},
+ {141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128},
+ },
+ {
+ { 1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128},
+ {190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128},
+ {149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+ },
+ {
+ { 1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+ {247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+ {240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+ },
+ {
+ { 1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128},
+ {213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128},
+ { 55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+ },
+ {
+ {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+ {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+ {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+ }
+ },
+ {
+ {
+ {202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255},
+ {126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128},
+ { 61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128},
+ },
+ {
+ { 1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128},
+ {166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128},
+ { 39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128},
+ },
+ {
+ { 1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128},
+ {124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128},
+ { 24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128},
+ },
+ {
+ { 1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128},
+ {149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128},
+ { 28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128}
+ },
+ {
+ { 1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128},
+ {123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128},
+ { 20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128},
+ },
+ {
+ { 1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128},
+ {168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128},
+ { 47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128},
+ },
+ {
+ { 1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128},
+ {141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128},
+ { 42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128},
+ },
+ {
+ { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+ {244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+ {238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+ },
+ },
+};
+
+const uint8_t kMVUpdateProbs[kNumMVContexts][kNumMVProbs] =
+{
+ {
+ 237, 246, 253, 253, 254, 254, 254, 254, 254,
+ 254, 254, 254, 254, 254, 250, 250, 252, 254, 254,
+ },
+ {
+ 231, 243, 245, 253, 254, 254, 254, 254, 254,
+ 254, 254, 254, 254, 254, 251, 251, 254, 254, 254,
+ },
+};
+
+const uint8_t kDefaultMVProbs[kNumMVContexts][kNumMVProbs] = {
+ {
+ 162, 128, 225, 146, 172, 147, 214, 39, 156,
+ 128, 129, 132, 75, 145, 178, 206, 239, 254, 254,
+ },
+ {
+ 164, 128, 204, 170, 119, 235, 140, 230, 228,
+ 128, 130, 130, 74, 148, 180, 203, 236, 254, 254,
+ },
+};
+
+void Vp8Parser::ResetProbs() {
+ static_assert(
+ sizeof(curr_entropy_hdr_.coeff_probs) == sizeof(kDefaultCoeffProbs),
+ "coeff_probs_arrays_must_be_of_correct_size");
+ memcpy(curr_entropy_hdr_.coeff_probs, kDefaultCoeffProbs,
+ sizeof(curr_entropy_hdr_.coeff_probs));
+
+ static_assert(sizeof(curr_entropy_hdr_.mv_probs) == sizeof(kDefaultMVProbs),
+ "mv_probs_arrays_must_be_of_correct_size");
+ memcpy(curr_entropy_hdr_.mv_probs, kDefaultMVProbs,
+ sizeof(curr_entropy_hdr_.mv_probs));
+
+ static_assert(
+ sizeof(curr_entropy_hdr_.y_mode_probs) == sizeof(kDefaultYModeProbs),
+ "y_probs_arrays_must_be_of_correct_size");
+ memcpy(curr_entropy_hdr_.y_mode_probs, kDefaultYModeProbs,
+ sizeof(curr_entropy_hdr_.y_mode_probs));
+
+ static_assert(
+ sizeof(curr_entropy_hdr_.uv_mode_probs) == sizeof(kDefaultUVModeProbs),
+ "uv_probs_arrays_must_be_of_correct_size");
+ memcpy(curr_entropy_hdr_.uv_mode_probs, kDefaultUVModeProbs,
+ sizeof(curr_entropy_hdr_.uv_mode_probs));
+}
+
+bool Vp8Parser::ParseTokenProbs(Vp8EntropyHeader* ehdr,
+ bool update_curr_probs) {
+ for (size_t i = 0; i < kNumBlockTypes; ++i) {
+ for (size_t j = 0; j < kNumCoeffBands; ++j) {
+ for (size_t k = 0; k < kNumPrevCoeffContexts; ++k) {
+ for (size_t l = 0; l < kNumEntropyNodes; ++l) {
+ bool coeff_prob_update_flag;
+ BD_READ_BOOL_WITH_PROB_OR_RETURN(&coeff_prob_update_flag,
+ kCoeffUpdateProbs[i][j][k][l]);
+ if (coeff_prob_update_flag)
+ BD_READ_UNSIGNED_OR_RETURN(8, &ehdr->coeff_probs[i][j][k][l]);
+ }
+ }
+ }
+ }
+
+ if (update_curr_probs) {
+ memcpy(curr_entropy_hdr_.coeff_probs, ehdr->coeff_probs,
+ sizeof(curr_entropy_hdr_.coeff_probs));
+ }
+
+ return true;
+}
+
+bool Vp8Parser::ParseIntraProbs(Vp8EntropyHeader* ehdr,
+ bool update_curr_probs,
+ bool keyframe) {
+ if (keyframe) {
+ static_assert(
+ sizeof(ehdr->y_mode_probs) == sizeof(kKeyframeYModeProbs),
+ "y_probs_arrays_must_be_of_correct_size");
+ memcpy(ehdr->y_mode_probs, kKeyframeYModeProbs,
+ sizeof(ehdr->y_mode_probs));
+
+ static_assert(
+ sizeof(ehdr->uv_mode_probs) == sizeof(kKeyframeUVModeProbs),
+ "uv_probs_arrays_must_be_of_correct_size");
+ memcpy(ehdr->uv_mode_probs, kKeyframeUVModeProbs,
+ sizeof(ehdr->uv_mode_probs));
+ } else {
+ bool intra_16x16_prob_update_flag;
+ BD_READ_BOOL_OR_RETURN(&intra_16x16_prob_update_flag);
+ if (intra_16x16_prob_update_flag) {
+ for (size_t i = 0; i < kNumYModeProbs; ++i)
+ BD_READ_UNSIGNED_OR_RETURN(8, &ehdr->y_mode_probs[i]);
+
+ if (update_curr_probs) {
+ memcpy(curr_entropy_hdr_.y_mode_probs, ehdr->y_mode_probs,
+ sizeof(curr_entropy_hdr_.y_mode_probs));
+ }
+ }
+
+ bool intra_chroma_prob_update_flag;
+ BD_READ_BOOL_OR_RETURN(&intra_chroma_prob_update_flag);
+ if (intra_chroma_prob_update_flag) {
+ for (size_t i = 0; i < kNumUVModeProbs; ++i)
+ BD_READ_UNSIGNED_OR_RETURN(8, &ehdr->uv_mode_probs[i]);
+
+ if (update_curr_probs) {
+ memcpy(curr_entropy_hdr_.uv_mode_probs, ehdr->uv_mode_probs,
+ sizeof(curr_entropy_hdr_.uv_mode_probs));
+ }
+ }
+ }
+
+ return true;
+}
+
+bool Vp8Parser::ParseMVProbs(Vp8EntropyHeader* ehdr, bool update_curr_probs) {
+ for (size_t mv_ctx = 0; mv_ctx < kNumMVContexts; ++mv_ctx) {
+ for (size_t p = 0; p < kNumMVProbs; ++p) {
+ bool mv_prob_update_flag;
+ BD_READ_BOOL_WITH_PROB_OR_RETURN(&mv_prob_update_flag,
+ kMVUpdateProbs[mv_ctx][p]);
+ if (mv_prob_update_flag) {
+ uint8_t prob;
+ BD_READ_UNSIGNED_OR_RETURN(7, &prob);
+ ehdr->mv_probs[mv_ctx][p] = prob ? (prob << 1) : 1;
+ }
+ }
+ }
+
+ if (update_curr_probs) {
+ memcpy(curr_entropy_hdr_.mv_probs, ehdr->mv_probs,
+ sizeof(curr_entropy_hdr_.mv_probs));
+ }
+
+ return true;
+}
+
+bool Vp8Parser::ParsePartitions(Vp8FrameHeader* fhdr) {
+ CHECK_GE(fhdr->num_of_dct_partitions, 1u);
+ CHECK_LE(fhdr->num_of_dct_partitions, kMaxDCTPartitions);
+
+ // DCT partitions start after the first partition and partition size values
+ // that follow it. There are num_of_dct_partitions - 1 sizes stored in the
+ // stream after the first partition, each 3 bytes long. The size of last
+ // DCT partition is not stored in the stream, but is instead calculated by
+ // taking the remainder of the frame size after the penultimate DCT partition.
+ size_t first_dct_pos = fhdr->first_part_offset + fhdr->first_part_size +
+ (fhdr->num_of_dct_partitions - 1) * 3;
+
+ // Make sure we have enough data for the first partition and partition sizes.
+ if (fhdr->frame_size < first_dct_pos)
+ return false;
+
+ // Total size of all DCT partitions.
+ size_t bytes_left = fhdr->frame_size - first_dct_pos;
+
+ // Position ourselves at the beginning of partition size values.
+ const uint8_t* ptr =
+ fhdr->data + fhdr->first_part_offset + fhdr->first_part_size;
+
+ // Read sizes from the stream (if present).
+ for (size_t i = 0; i < fhdr->num_of_dct_partitions - 1; ++i) {
+ fhdr->dct_partition_sizes[i] = (ptr[2] << 16) | (ptr[1] << 8) | ptr[0];
+
+ // Make sure we have enough data in the stream for ith partition and
+ // subtract its size from total.
+ if (bytes_left < fhdr->dct_partition_sizes[i])
+ return false;
+
+ bytes_left -= fhdr->dct_partition_sizes[i];
+
+ // Move to the position of the next partition size value.
+ ptr += 3;
+ }
+
+ // The remainder of the data belongs to the last DCT partition.
+ fhdr->dct_partition_sizes[fhdr->num_of_dct_partitions - 1] = bytes_left;
+
+ DVLOG(4) << "Control part size: " << fhdr->first_part_size;
+ for (size_t i = 0; i < fhdr->num_of_dct_partitions; ++i)
+ DVLOG(4) << "DCT part " << i << " size: " << fhdr->dct_partition_sizes[i];
+
+ return true;
+}
+
+} // namespace media
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-22 21:53:27 +0000