#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "internal.h"
#include "vp8.h"
#include "vp8data.h"
#include "rectangle.h"
#include "thread.h"
Go to the source code of this file.
Macros | |
#define | MV_EDGE_CHECK(n) |
#define | XCHG(a, b, xchg) |
#define | MARGIN (16 << 2) |
#define | REBASE(pic) pic ? pic - &s_src->frames[0] + &s->frames[0] : NULL |
Functions | |
static void | free_buffers (VP8Context *s) |
VP8 compatible video decoder. | |
static int | vp8_alloc_frame (VP8Context *s, AVFrame *f) |
static void | vp8_release_frame (VP8Context *s, AVFrame *f, int prefer_delayed_free, int can_direct_free) |
static void | vp8_decode_flush_impl (AVCodecContext *avctx, int prefer_delayed_free, int can_direct_free, int free_mem) |
static void | vp8_decode_flush (AVCodecContext *avctx) |
static int | update_dimensions (VP8Context *s, int width, int height) |
static void | parse_segment_info (VP8Context *s) |
static void | update_lf_deltas (VP8Context *s) |
static int | setup_partitions (VP8Context *s, const uint8_t *buf, int buf_size) |
static void | get_quants (VP8Context *s) |
static VP56Frame | ref_to_update (VP8Context *s, int update, VP56Frame ref) |
Determine which buffers golden and altref should be updated with after this frame. | |
static void | update_refs (VP8Context *s) |
static int | decode_frame_header (VP8Context *s, const uint8_t *buf, int buf_size) |
static av_always_inline void | clamp_mv (VP8Context *s, VP56mv *dst, const VP56mv *src) |
static int | read_mv_component (VP56RangeCoder *c, const uint8_t *p) |
Motion vector coding, 17.1. | |
static av_always_inline const uint8_t * | get_submv_prob (uint32_t left, uint32_t top) |
static av_always_inline int | decode_splitmvs (VP8Context *s, VP56RangeCoder *c, VP8Macroblock *mb) |
Split motion vector prediction, 16.4. | |
static av_always_inline void | decode_mvs (VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y) |
static av_always_inline void | decode_intra4x4_modes (VP8Context *s, VP56RangeCoder *c, int mb_x, int keyframe) |
static av_always_inline void | decode_mb_mode (VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, uint8_t *segment, uint8_t *ref) |
static int | decode_block_coeffs_internal (VP56RangeCoder *c, DCTELEM block[16], uint8_t probs[16][3][NUM_DCT_TOKENS-1], int i, uint8_t *token_prob, int16_t qmul[2]) |
static av_always_inline int | decode_block_coeffs (VP56RangeCoder *c, DCTELEM block[16], uint8_t probs[16][3][NUM_DCT_TOKENS-1], int i, int zero_nhood, int16_t qmul[2]) |
static av_always_inline void | decode_mb_coeffs (VP8Context *s, VP56RangeCoder *c, VP8Macroblock *mb, uint8_t t_nnz[9], uint8_t l_nnz[9]) |
static av_always_inline void | backup_mb_border (uint8_t *top_border, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int simple) |
static av_always_inline void | xchg_mb_border (uint8_t *top_border, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int mb_x, int mb_y, int mb_width, int simple, int xchg) |
static av_always_inline int | check_dc_pred8x8_mode (int mode, int mb_x, int mb_y) |
static av_always_inline int | check_tm_pred8x8_mode (int mode, int mb_x, int mb_y) |
static av_always_inline int | check_intra_pred8x8_mode (int mode, int mb_x, int mb_y) |
static av_always_inline int | check_intra_pred8x8_mode_emuedge (int mode, int mb_x, int mb_y) |
static av_always_inline int | check_tm_pred4x4_mode (int mode, int mb_x, int mb_y) |
static av_always_inline int | check_intra_pred4x4_mode_emuedge (int mode, int mb_x, int mb_y, int *copy_buf) |
static av_always_inline void | intra_predict (VP8Context *s, uint8_t *dst[3], VP8Macroblock *mb, int mb_x, int mb_y) |
static av_always_inline void | vp8_mc_luma (VP8Context *s, uint8_t *dst, AVFrame *ref, const VP56mv *mv, int x_off, int y_off, int block_w, int block_h, int width, int height, int linesize, vp8_mc_func mc_func[3][3]) |
luma MC function | |
static av_always_inline void | vp8_mc_chroma (VP8Context *s, uint8_t *dst1, uint8_t *dst2, AVFrame *ref, const VP56mv *mv, int x_off, int y_off, int block_w, int block_h, int width, int height, int linesize, vp8_mc_func mc_func[3][3]) |
chroma MC function | |
static av_always_inline void | vp8_mc_part (VP8Context *s, uint8_t *dst[3], AVFrame *ref_frame, int x_off, int y_off, int bx_off, int by_off, int block_w, int block_h, int width, int height, VP56mv *mv) |
static av_always_inline void | prefetch_motion (VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, int mb_xy, int ref) |
static av_always_inline void | inter_predict (VP8Context *s, uint8_t *dst[3], VP8Macroblock *mb, int mb_x, int mb_y) |
Apply motion vectors to prediction buffer, chapter 18. | |
static av_always_inline void | idct_mb (VP8Context *s, uint8_t *dst[3], VP8Macroblock *mb) |
static av_always_inline void | filter_level_for_mb (VP8Context *s, VP8Macroblock *mb, VP8FilterStrength *f) |
static av_always_inline void | filter_mb (VP8Context *s, uint8_t *dst[3], VP8FilterStrength *f, int mb_x, int mb_y) |
static av_always_inline void | filter_mb_simple (VP8Context *s, uint8_t *dst, VP8FilterStrength *f, int mb_x, int mb_y) |
static void | filter_mb_row (VP8Context *s, AVFrame *curframe, int mb_y) |
static void | filter_mb_row_simple (VP8Context *s, AVFrame *curframe, int mb_y) |
static void | release_queued_segmaps (VP8Context *s, int is_close) |
static int | vp8_decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) |
static av_cold int | vp8_decode_init (AVCodecContext *avctx) |
static av_cold int | vp8_decode_free (AVCodecContext *avctx) |
static av_cold int | vp8_decode_init_thread_copy (AVCodecContext *avctx) |
static int | vp8_decode_update_thread_context (AVCodecContext *dst, const AVCodecContext *src) |
Variables | |
static const uint8_t | subpel_idx [3][8] |
AVCodec | ff_vp8_decoder |
#define MARGIN (16 << 2) |
Referenced by vp8_decode_frame().
#define MV_EDGE_CHECK | ( | n | ) |
Referenced by decode_mvs().
#define REBASE | ( | pic | ) | pic ? pic - &s_src->frames[0] + &s->frames[0] : NULL |
Definition at line 1809 of file vp8.c.
Referenced by vp8_decode_update_thread_context().
#define XCHG | ( | a, | |
b, | |||
xchg | |||
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Definition at line 837 of file vp8.c.
Referenced by filter_mb_row(), and filter_mb_row_simple().
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Definition at line 879 of file vp8.c.
Referenced by check_intra_pred8x8_mode(), and check_intra_pred8x8_mode_emuedge().
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Definition at line 935 of file vp8.c.
Referenced by intra_predict().
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Definition at line 899 of file vp8.c.
Referenced by intra_predict().
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Definition at line 909 of file vp8.c.
Referenced by intra_predict().
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Definition at line 925 of file vp8.c.
Referenced by check_intra_pred4x4_mode_emuedge().
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Definition at line 889 of file vp8.c.
Referenced by check_intra_pred8x8_mode_emuedge().
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Definition at line 408 of file vp8.c.
Referenced by decode_mvs().
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c | arithmetic bitstream reader context |
block | destination for block coefficients |
probs | probabilities to use when reading trees from the bitstream |
i | initial coeff index, 0 unless a separate DC block is coded |
zero_nhood | the initial prediction context for number of surrounding all-zero blocks (only left/top, so 0-2) |
qmul | array holding the dc/ac dequant factor at position 0/1 |
Definition at line 765 of file vp8.c.
Referenced by decode_mb_coeffs().
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c | arithmetic bitstream reader context |
block | destination for block coefficients |
probs | probabilities to use when reading trees from the bitstream |
i | initial coeff index, 0 unless a separate DC block is coded |
qmul | array holding the dc/ac dequant factor at position 0/1 |
Definition at line 699 of file vp8.c.
Referenced by decode_block_coeffs().
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Definition at line 270 of file vp8.c.
Referenced by vp8_decode_frame().
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Definition at line 614 of file vp8.c.
Referenced by decode_mb_mode().
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Definition at line 776 of file vp8.c.
Referenced by vp8_decode_frame().
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Definition at line 639 of file vp8.c.
Referenced by vp8_decode_frame().
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Definition at line 524 of file vp8.c.
Referenced by decode_mb_mode().
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Split motion vector prediction, 16.4.
Definition at line 460 of file vp8.c.
Referenced by decode_mvs().
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Definition at line 1393 of file vp8.c.
Referenced by vp8_decode_frame().
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Definition at line 1423 of file vp8.c.
Referenced by filter_mb_row().
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Definition at line 1524 of file vp8.c.
Referenced by vp8_decode_frame().
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Definition at line 1543 of file vp8.c.
Referenced by vp8_decode_frame().
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Definition at line 1493 of file vp8.c.
Referenced by filter_mb_row_simple().
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VP8 compatible video decoder.
Copyright (C) 2010 David Conrad Copyright (C) 2010 Ronald S. Bultje Copyright (C) 2010 Jason Garrett-Glaser
This file is part of Libav.
Libav 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.
Libav 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 Libav; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Definition at line 37 of file vp8.c.
Referenced by vp8_decode_flush_impl(), and vp8_decode_update_thread_context().
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Definition at line 198 of file vp8.c.
Referenced by decode_frame_header().
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Definition at line 446 of file vp8.c.
Referenced by decode_splitmvs().
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Definition at line 1341 of file vp8.c.
Referenced by vp8_decode_frame().
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Apply motion vectors to prediction buffer, chapter 18.
Definition at line 1261 of file vp8.c.
Referenced by vp8_decode_frame().
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Definition at line 969 of file vp8.c.
Referenced by vp8_decode_frame().
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Definition at line 139 of file vp8.c.
Referenced by decode_frame_header().
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Definition at line 1239 of file vp8.c.
Referenced by vp8_decode_frame().
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Motion vector coding, 17.1.
Definition at line 417 of file vp8.c.
Referenced by decode_mvs(), and decode_splitmvs().
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Determine which buffers golden and altref should be updated with after this frame.
The spec isn't clear here, so I'm going by my understanding of what libvpx does
Intra frames update all 3 references Inter frames update VP56_FRAME_PREVIOUS if the update_last flag is set If the update (golden|altref) flag is set, it's updated with the current frame if update_last is set, and VP56_FRAME_PREVIOUS otherwise. If the flag is not set, the number read means: 0: no update 1: VP56_FRAME_PREVIOUS 2: update golden with altref, or update altref with golden
Definition at line 243 of file vp8.c.
Referenced by update_refs().
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Definition at line 1556 of file vp8.c.
Referenced by vp8_decode_frame(), and vp8_decode_free().
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Definition at line 172 of file vp8.c.
Referenced by decode_frame_header().
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Definition at line 109 of file vp8.c.
Referenced by decode_frame_header().
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Definition at line 160 of file vp8.c.
Referenced by decode_frame_header().
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Definition at line 259 of file vp8.c.
Referenced by decode_frame_header().
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Definition at line 49 of file vp8.c.
Referenced by vp8_decode_frame().
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Definition at line 85 of file vp8.c.
Referenced by update_dimensions(), vp8_decode_flush(), and vp8_decode_free().
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chroma MC function
s | VP8 decoding context |
dst1 | target buffer for block data at block position (U plane) |
dst2 | target buffer for block data at block position (V plane) |
ref | reference picture buffer at origin (0, 0) |
mv | motion vector (relative to block position) to get pixel data from |
x_off | horizontal position of block from origin (0, 0) |
y_off | vertical position of block from origin (0, 0) |
block_w | width of block (16, 8 or 4) |
block_h | height of block (always same as block_w) |
width | width of src/dst plane data |
height | height of src/dst plane data |
linesize | size of a single line of plane data, including padding |
mc_func | motion compensation function pointers (bilinear or sixtap MC) |
Definition at line 1164 of file vp8.c.
Referenced by inter_predict(), and vp8_mc_part().
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luma MC function
s | VP8 decoding context |
dst | target buffer for block data at block position |
ref | reference picture buffer at origin (0, 0) |
mv | motion vector (relative to block position) to get pixel data from |
x_off | horizontal position of block from origin (0, 0) |
y_off | vertical position of block from origin (0, 0) |
block_w | width of block (16, 8 or 4) |
block_h | height of block (always same as block_w) |
width | width of src/dst plane data |
height | height of src/dst plane data |
linesize | size of a single line of plane data, including padding |
mc_func | motion compensation function pointers (bilinear or sixtap MC) |
Definition at line 1114 of file vp8.c.
Referenced by inter_predict(), and vp8_mc_part().
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Definition at line 1207 of file vp8.c.
Referenced by inter_predict().
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Definition at line 63 of file vp8.c.
Referenced by vp8_decode_flush_impl(), and vp8_decode_frame().
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Definition at line 848 of file vp8.c.
Referenced by intra_predict().
AVCodec ff_vp8_decoder |
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Definition at line 1090 of file vp8.c.
Referenced by vp8_mc_chroma(), and vp8_mc_luma().