FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
3			*
4			* This file is part of FFmpeg.
5			*
6			* FFmpeg is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10			*
11			* FFmpeg is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15			*
16			* You should have received a copy of the GNU Lesser General Public
17			* License along with FFmpeg; if not, write to the Free Software
18			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19			*/
20
21			/**
22			* @file
23			* VP5 and VP6 compatible video decoder (common features)
24			*/
25
26			#ifndef AVCODEC_VP56_H
27			#define AVCODEC_VP56_H
28
29			#include "libavutil/mem_internal.h"
30
31			#include "avcodec.h"
32			#include "get_bits.h"
33			#include "hpeldsp.h"
34			#include "h264chroma.h"
35			#include "videodsp.h"
36			#include "vp3dsp.h"
37			#include "vp56dsp.h"
38			#include "vpx_rac.h"
39
40			typedef struct vp56_context VP56Context;
41
42			typedef enum {
43			VP56_FRAME_NONE =-1,
44			VP56_FRAME_CURRENT = 0,
45			VP56_FRAME_PREVIOUS = 1,
46			VP56_FRAME_GOLDEN = 2,
47			} VP56Frame;
48
49			typedef enum {
50			VP56_MB_INTER_NOVEC_PF = 0, /*< Inter MB, no vector, from previous frame /
51			VP56_MB_INTRA = 1, /*< Intra MB /
52			VP56_MB_INTER_DELTA_PF = 2, /*< Inter MB, above/left vector + delta, from previous frame /
53			VP56_MB_INTER_V1_PF = 3, /*< Inter MB, first vector, from previous frame /
54			VP56_MB_INTER_V2_PF = 4, /*< Inter MB, second vector, from previous frame /
55			VP56_MB_INTER_NOVEC_GF = 5, /*< Inter MB, no vector, from golden frame /
56			VP56_MB_INTER_DELTA_GF = 6, /*< Inter MB, above/left vector + delta, from golden frame /
57			VP56_MB_INTER_4V = 7, /*< Inter MB, 4 vectors, from previous frame /
58			VP56_MB_INTER_V1_GF = 8, /*< Inter MB, first vector, from golden frame /
59			VP56_MB_INTER_V2_GF = 9, /*< Inter MB, second vector, from golden frame /
60			} VP56mb;
61
62			typedef struct VP56Tree {
63			int8_t val;
64			int8_t prob_idx;
65			} VP56Tree;
66
67			typedef struct VP56mv {
68			DECLARE_ALIGNED(4, int16_t, x);
69			int16_t y;
70			} VP56mv;
71
72			#define VP56_SIZE_CHANGE 1
73
74			typedef void (VP56ParseVectorAdjustment)(VP56Context s,
75			VP56mv *vect);
76			typedef void (VP56Filter)(VP56Context s, uint8_t dst, uint8_t src,
77			int offset1, int offset2, ptrdiff_t stride,
78			VP56mv mv, int mask, int select, int luma);
79			typedef int (VP56ParseCoeff)(VP56Context s);
80			typedef void (VP56DefaultModelsInit)(VP56Context s);
81			typedef void (VP56ParseVectorModels)(VP56Context s);
82			typedef int (VP56ParseCoeffModels)(VP56Context s);
83			typedef int (VP56ParseHeader)(VP56Context s, const uint8_t *buf,
84			int buf_size);
85
86			typedef struct VP56RefDc {
87			uint8_t not_null_dc;
88			VP56Frame ref_frame;
89			int16_t dc_coeff;
90			} VP56RefDc;
91
92			typedef struct VP56Macroblock {
93			uint8_t type;
94			VP56mv mv;
95			} VP56Macroblock;
96
97			typedef struct VP56Model {
98			uint8_t coeff_reorder[64]; /* used in vp6 only */
99			uint8_t coeff_index_to_pos[64]; /* used in vp6 only */
100			uint8_t coeff_index_to_idct_selector[64]; /* used in vp6 only */
101			uint8_t vector_sig[2]; /* delta sign */
102			uint8_t vector_dct[2]; /* delta coding types */
103			uint8_t vector_pdi[2][2]; /* predefined delta init */
104			uint8_t vector_pdv[2][7]; /* predefined delta values */
105			uint8_t vector_fdv[2][8]; /* 8 bit delta value definition */
106			uint8_t coeff_dccv[2][11]; /* DC coeff value */
107			uint8_t coeff_ract[2][3][6][11]; /* Run/AC coding type and AC coeff value */
108			uint8_t coeff_acct[2][3][3][6][5];/* vp5 only AC coding type for coding group < 3 */
109			uint8_t coeff_dcct[2][36][5]; /* DC coeff coding type */
110			uint8_t coeff_runv[2][14]; /* run value (vp6 only) */
111			uint8_t mb_type[3][10][10]; /* model for decoding MB type */
112			uint8_t mb_types_stats[3][10][2];/* contextual, next MB type stats */
113			} VP56Model;
114
115			struct vp56_context {
116			AVCodecContext *avctx;
117			H264ChromaContext h264chroma;
118			HpelDSPContext hdsp;
119			VideoDSPContext vdsp;
120			VP3DSPContext vp3dsp;
121			VP56DSPContext vp56dsp;
122			uint8_t idct_scantable[64];
123			AVFrame *frames[4];
124			uint8_t *edge_emu_buffer_alloc;
125			uint8_t *edge_emu_buffer;
126			VPXRangeCoder c;
127			VPXRangeCoder cc;
128			VPXRangeCoder *ccp;
129			int sub_version;
130
131			/* frame info */
132			int golden_frame;
133			int plane_width[4];
134			int plane_height[4];
135			int mb_width; /* number of horizontal MB */
136			int mb_height; /* number of vertical MB */
137			int block_offset[6];
138
139			int quantizer;
140			uint16_t dequant_dc;
141			uint16_t dequant_ac;
142
143			/* DC predictors management */
144			VP56RefDc *above_blocks;
145			VP56RefDc left_block[4];
146			int above_block_idx[6];
147			int16_t prev_dc[3][3]; /* [plan][ref_frame] */
148
149			/* blocks / macroblock */
150			VP56mb mb_type;
151			VP56Macroblock *macroblocks;
152			DECLARE_ALIGNED(16, int16_t, block_coeff)[6][64];
153			int idct_selector[6];
154
155			/* motion vectors */
156			VP56mv mv[6]; /* vectors for each block in MB */
157			VP56mv vector_candidate[2];
158			int vector_candidate_pos;
159
160			/* filtering hints */
161			int filter_header; /* used in vp6 only */
162			int deblock_filtering;
163			int filter_selection;
164			int filter_mode;
165			int max_vector_length;
166			int sample_variance_threshold;
167			DECLARE_ALIGNED(8, int, bounding_values_array)[256];
168
169			uint8_t coeff_ctx[4][64]; /* used in vp5 only */
170			uint8_t coeff_ctx_last[4]; /* used in vp5 only */
171
172			int has_alpha;
173
174			/* upside-down flipping hints */
175			int flip; /* are we flipping ? */
176			int frbi; /* first row block index in MB */
177			int srbi; /* second row block index in MB */
178			ptrdiff_t stride[4]; /* stride for each plan */
179
180			const uint8_t *vp56_coord_div;
181			VP56ParseVectorAdjustment parse_vector_adjustment;
182			VP56Filter filter;
183			VP56ParseCoeff parse_coeff;
184			VP56DefaultModelsInit default_models_init;
185			VP56ParseVectorModels parse_vector_models;
186			VP56ParseCoeffModels parse_coeff_models;
187			VP56ParseHeader parse_header;
188
189			/* for "slice" parallelism between YUV and A */
190			VP56Context *alpha_context;
191
192			VP56Model *modelp;
193			VP56Model model;
194
195			/* huffman decoding */
196			int use_huffman;
197			GetBitContext gb;
198			VLC dccv_vlc[2];
199			VLC runv_vlc[2];
200			VLC ract_vlc[2][3][6];
201			unsigned int nb_null[2][2]; /* number of consecutive NULL DC/AC */
202
203			int have_undamaged_frame;
204			int discard_frame;
205			};
206
207
208			/**
209			* Initializes an VP56Context. Expects its caller to clean up
210			* in case of error.
211			*/
212			int ff_vp56_init_context(AVCodecContext avctx, VP56Context s,
213			int flip, int has_alpha);
214			int ff_vp56_free_context(VP56Context *s);
215			void ff_vp56_init_dequant(VP56Context *s, int quantizer);
216			int ff_vp56_decode_frame(AVCodecContext avctx, AVFrame frame,
217			int got_frame, AVPacket avpkt);
218
219
220			/**
221			* vp56 specific range coder implementation
222			*/
223
224		52237	static int vp56_rac_gets(VPXRangeCoder *c, int bits)
225			{
226		52237	int value = 0;
227
228	2/2 ✓ Branch 0 taken 151258 times. ✓ Branch 1 taken 52237 times.	203495	while (bits--) {
229		151258	value = (value << 1) \| vpx_rac_get(c);
230			}
231
232		52237	return value;
233			}
234
235			// P(7)
236		8496	static av_unused int vp56_rac_gets_nn(VPXRangeCoder *c, int bits)
237			{
238		8496	int v = vp56_rac_gets(c, 7) << 1;
239		8496	return v + !v;
240			}
241
242			static av_always_inline
243		445510	int vp56_rac_get_tree(VPXRangeCoder *c,
244			const VP56Tree *tree,
245			const uint8_t *probs)
246			{
247	2/2 ✓ Branch 0 taken 1319419 times. ✓ Branch 1 taken 445510 times.	1764929	while (tree->val > 0) {
248	2/2 ✓ Branch 1 taken 450669 times. ✓ Branch 2 taken 868750 times.	1319419	if (vpx_rac_get_prob_branchy(c, probs[tree->prob_idx]))
249		450669	tree += tree->val;
250			else
251		868750	tree++;
252			}
253		445510	return -tree->val;
254			}
255
256			#endif /* AVCODEC_VP56_H */
257