lavc: Add coded bitstream read/write support for VP9

1 files changed, 201 insertions, 0 deletions

diff --git a/libavcodec/cbs_vp9.h b/libavcodec/cbs_vp9.h
new file mode 100644
index 0000000..5b99c90
--- /dev/null
+++ b/libavcodec/cbs_vp9.h
@@ -0,0 +1,201 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_CBS_VP9_H
+#define AVCODEC_CBS_VP9_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "cbs.h"
+
+
+// Miscellaneous constants (section 3).
+enum {
+    VP9_REFS_PER_FRAME = 3,
+
+    VP9_MIN_TILE_WIDTH_B64 = 4,
+    VP9_MAX_TILE_WIDTH_B64 = 64,
+
+    VP9_NUM_REF_FRAMES = 8,
+    VP9_MAX_REF_FRAMES = 4,
+
+    VP9_MAX_SEGMENTS = 8,
+    VP9_SEG_LVL_MAX  = 4,
+};
+
+// Frame types (section 7.2).
+enum {
+    VP9_KEY_FRAME     = 0,
+    VP9_NON_KEY_FRAME = 1,
+};
+
+// Frame sync bytes (section 7.2.1).
+enum {
+    VP9_FRAME_SYNC_0 = 0x49,
+    VP9_FRAME_SYNC_1 = 0x83,
+    VP9_FRAME_SYNC_2 = 0x42,
+};
+
+// Color space values (section 7.2.2).
+enum {
+    VP9_CS_UNKNOWN   = 0,
+    VP9_CS_BT_601    = 1,
+    VP9_CS_BT_709    = 2,
+    VP9_CS_SMPTE_170 = 3,
+    VP9_CS_SMPTE_240 = 4,
+    VP9_CS_BT_2020   = 5,
+    VP9_CS_RESERVED  = 6,
+    VP9_CS_RGB       = 7,
+};
+
+// Reference frame types (section 7.4.12).
+enum {
+    VP9_INTRA_FRAME  = 0,
+    VP9_LAST_FRAME   = 1,
+    VP9_GOLDEN_FRAME = 2,
+    VP9_ALTREF_FRAME = 3,
+};
+
+// Superframe properties (section B.3).
+enum {
+    VP9_MAX_FRAMES_IN_SUPERFRAME = 8,
+
+    VP9_SUPERFRAME_MARKER = 6,
+};
+
+
+typedef struct VP9RawFrameHeader {
+    uint8_t frame_marker;
+    uint8_t profile_low_bit;
+    uint8_t profile_high_bit;
+    uint8_t profile_reserved_zero;
+
+    uint8_t show_existing_frame;
+    uint8_t frame_to_show_map_idx;
+
+    uint8_t frame_type;
+    uint8_t show_frame;
+    uint8_t error_resilient_mode;
+
+    // Color config.
+    uint8_t ten_or_twelve_bit;
+    uint8_t color_space;
+    uint8_t color_range;
+    uint8_t subsampling_x;
+    uint8_t subsampling_y;
+    uint8_t color_config_reserved_zero;
+
+    uint8_t refresh_frame_flags;
+
+    uint8_t intra_only;
+    uint8_t reset_frame_context;
+
+    uint8_t ref_frame_idx[VP9_REFS_PER_FRAME];
+    uint8_t ref_frame_sign_bias[VP9_MAX_REF_FRAMES];
+
+    uint8_t allow_high_precision_mv;
+
+    uint8_t refresh_frame_context;
+    uint8_t frame_parallel_decoding_mode;
+
+    uint8_t frame_context_idx;
+
+    // Frame/render size.
+    uint8_t found_ref[VP9_REFS_PER_FRAME];
+    uint16_t frame_width_minus_1;
+    uint16_t frame_height_minus_1;
+    uint8_t render_and_frame_size_different;
+    uint16_t render_width_minus_1;
+    uint16_t render_height_minus_1;
+
+    // Interpolation filter.
+    uint8_t is_filter_switchable;
+    uint8_t raw_interpolation_filter_type;
+
+    // Loop filter params.
+    uint8_t loop_filter_level;
+    uint8_t loop_filter_sharpness;
+    uint8_t loop_filter_delta_enabled;
+    uint8_t loop_filter_delta_update;
+    uint8_t update_ref_delta[VP9_MAX_REF_FRAMES];
+    int8_t loop_filter_ref_deltas[VP9_MAX_REF_FRAMES];
+    uint8_t update_mode_delta[2];
+    int8_t loop_filter_mode_deltas[2];
+
+    // Quantization params.
+    uint8_t base_q_idx;
+    int8_t delta_q_y_dc;
+    int8_t delta_q_uv_dc;
+    int8_t delta_q_uv_ac;
+
+    // Segmentation params.
+    uint8_t segmentation_enabled;
+    uint8_t segmentation_update_map;
+    uint8_t segmentation_tree_probs[7];
+    uint8_t segmentation_temporal_update;
+    uint8_t segmentation_pred_prob[3];
+    uint8_t segmentation_update_data;
+    uint8_t segmentation_abs_or_delta_update;
+    uint8_t feature_enabled[VP9_MAX_SEGMENTS][VP9_SEG_LVL_MAX];
+    uint8_t feature_value[VP9_MAX_SEGMENTS][VP9_SEG_LVL_MAX];
+    uint8_t feature_sign[VP9_MAX_SEGMENTS][VP9_SEG_LVL_MAX];
+
+    // Tile info.
+    uint8_t tile_cols_log2;
+    uint8_t tile_rows_log2;
+
+    uint16_t header_size_in_bytes;
+} VP9RawFrameHeader;
+
+typedef struct VP9RawFrame {
+    VP9RawFrameHeader header;
+
+    uint8_t     *data;
+    size_t       data_size;
+    AVBufferRef *data_ref;
+} VP9RawFrame;
+
+typedef struct VP9RawSuperframeIndex {
+    uint8_t superframe_marker;
+    uint8_t bytes_per_framesize_minus_1;
+    uint8_t frames_in_superframe_minus_1;
+    uint32_t frame_sizes[VP9_MAX_FRAMES_IN_SUPERFRAME];
+} VP9RawSuperframeIndex;
+
+typedef struct VP9RawSuperframe {
+    VP9RawFrame frames[VP9_MAX_FRAMES_IN_SUPERFRAME];
+    VP9RawSuperframeIndex index;
+} VP9RawSuperframe;
+
+
+typedef struct CodedBitstreamVP9Context {
+    // Frame dimensions in 8x8 mode info blocks.
+    uint16_t mi_cols;
+    uint16_t mi_rows;
+    // Frame dimensions in 64x64 superblocks.
+    uint16_t sb64_cols;
+    uint16_t sb64_rows;
+
+    // Write buffer.
+    uint8_t *write_buffer;
+    size_t write_buffer_size;
+} CodedBitstreamVP9Context;
+
+
+#endif /* AVCODEC_CBS_VP9_H */