15a90668a5
In large-scale tile coding, when the number of tiles is large and the tile size is small, using a fixed number of bytes in the tile header to store tile-data size information as done in current VP9 codec would bring high overhead for each tile. This patch implemented 2 ways to lower that overhead and adaptively determine the number of bytes needed for tile-data size transmission. The test on a test clip having the tile size of 64x64 showed that the number of bytes used for storing tile-data size was reduced from 4 to 1, which substantially improved the compression ratio in large-scale tile coding. Change-Id: Ia02fc43eda67fa252fbc2554321957790f53f6fd
122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VP9_DECODER_VP9_DECODER_H_
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#define VP9_DECODER_VP9_DECODER_H_
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#include "./vpx_config.h"
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#include "vpx/vpx_codec.h"
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#include "vpx_ports/mem_ops.h"
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#include "vpx_scale/yv12config.h"
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#include "vp9/common/vp9_onyxc_int.h"
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#include "vp9/common/vp9_ppflags.h"
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#include "vp9/common/vp9_thread.h"
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#include "vp9/decoder/vp9_dthread.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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// TODO(hkuang): combine this with TileWorkerData.
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typedef struct TileData {
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VP9_COMMON *cm;
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vp9_reader bit_reader;
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DECLARE_ALIGNED(16, MACROBLOCKD, xd);
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} TileData;
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typedef struct TileBuffer {
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const uint8_t *data;
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size_t size;
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int col; // only used with multi-threaded decoding
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} TileBuffer;
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typedef struct VP9Decoder {
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DECLARE_ALIGNED(16, MACROBLOCKD, mb);
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DECLARE_ALIGNED(16, VP9_COMMON, common);
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int ready_for_new_data;
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int refresh_frame_flags;
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int frame_parallel_decode; // frame-based threading.
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VP9Worker lf_worker;
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VP9Worker *tile_workers;
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int num_tile_workers;
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TileData *tile_data;
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int total_tiles;
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VP9LfSync lf_row_sync;
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vpx_decrypt_cb decrypt_cb;
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void *decrypt_state;
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int max_threads;
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int inv_tile_order;
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int need_resync; // wait for key/intra-only frame
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#if CONFIG_ROW_TILE
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TileBuffer tile_buffers[1024][1024];
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int dec_tile_row, dec_tile_col;
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#endif
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} VP9Decoder;
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#if CONFIG_ROW_TILE
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typedef unsigned MEM_VALUE_T (*MemRead)(const void *);
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#endif
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int vp9_receive_compressed_data(struct VP9Decoder *pbi,
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size_t size, const uint8_t **dest);
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int vp9_get_raw_frame(struct VP9Decoder *pbi, YV12_BUFFER_CONFIG *sd,
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vp9_ppflags_t *flags);
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vpx_codec_err_t vp9_copy_reference_dec(struct VP9Decoder *pbi,
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VP9_REFFRAME ref_frame_flag,
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YV12_BUFFER_CONFIG *sd);
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vpx_codec_err_t vp9_set_reference_dec(VP9_COMMON *cm,
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VP9_REFFRAME ref_frame_flag,
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YV12_BUFFER_CONFIG *sd);
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struct VP9Decoder *vp9_decoder_create();
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void vp9_decoder_remove(struct VP9Decoder *pbi);
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static INLINE uint8_t read_marker(vpx_decrypt_cb decrypt_cb,
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void *decrypt_state,
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const uint8_t *data) {
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if (decrypt_cb) {
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uint8_t marker;
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decrypt_cb(decrypt_state, data, &marker, 1);
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return marker;
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}
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return *data;
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}
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// This function is exposed for use in tests, as well as the inlined function
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// "read_marker".
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vpx_codec_err_t vp9_parse_superframe_index(const uint8_t *data,
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size_t data_sz,
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uint32_t sizes[8], int *count,
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vpx_decrypt_cb decrypt_cb,
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void *decrypt_state);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // VP9_DECODER_VP9_DECODER_H_
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