Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/asvdec.c |
Date: | 2022-07-07 01:21:54 |
Exec | Total | Coverage | |
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Lines: | 141 | 157 | 89.8% |
Branches: | 76 | 94 | 80.9% |
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1 | /* | ||
2 | * Copyright (c) 2003 Michael Niedermayer | ||
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 | * ASUS V1/V2 decoder. | ||
24 | */ | ||
25 | |||
26 | #include "libavutil/attributes.h" | ||
27 | #include "libavutil/mem.h" | ||
28 | #include "libavutil/thread.h" | ||
29 | |||
30 | #include "asv.h" | ||
31 | #include "avcodec.h" | ||
32 | #include "blockdsp.h" | ||
33 | #include "codec_internal.h" | ||
34 | #include "config_components.h" | ||
35 | #include "idctdsp.h" | ||
36 | #include "internal.h" | ||
37 | #include "mpeg12data.h" | ||
38 | |||
39 | #define CCP_VLC_BITS 5 | ||
40 | #define DC_CCP_VLC_BITS 4 | ||
41 | #define AC_CCP_VLC_BITS 6 | ||
42 | #define ASV1_LEVEL_VLC_BITS 4 | ||
43 | #define ASV2_LEVEL_VLC_BITS 10 | ||
44 | |||
45 | static VLC ccp_vlc; | ||
46 | static VLC level_vlc; | ||
47 | static VLC dc_ccp_vlc; | ||
48 | static VLC ac_ccp_vlc; | ||
49 | static VLC asv2_level_vlc; | ||
50 | |||
51 | 10 | static av_cold void init_vlcs(void) | |
52 | { | ||
53 | 10 | INIT_VLC_STATIC(&ccp_vlc, CCP_VLC_BITS, 17, | |
54 | &ff_asv_ccp_tab[0][1], 2, 1, | ||
55 | &ff_asv_ccp_tab[0][0], 2, 1, 32); | ||
56 | 10 | INIT_LE_VLC_STATIC(&dc_ccp_vlc, DC_CCP_VLC_BITS, 8, | |
57 | &ff_asv_dc_ccp_tab[0][1], 2, 1, | ||
58 | &ff_asv_dc_ccp_tab[0][0], 2, 1, 16); | ||
59 | 10 | INIT_LE_VLC_STATIC(&ac_ccp_vlc, AC_CCP_VLC_BITS, 16, | |
60 | &ff_asv_ac_ccp_tab[0][1], 2, 1, | ||
61 | &ff_asv_ac_ccp_tab[0][0], 2, 1, 64); | ||
62 | 10 | INIT_VLC_STATIC(&level_vlc, ASV1_LEVEL_VLC_BITS, 7, | |
63 | &ff_asv_level_tab[0][1], 2, 1, | ||
64 | &ff_asv_level_tab[0][0], 2, 1, 16); | ||
65 | 10 | INIT_LE_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63, | |
66 | &ff_asv2_level_tab[0][1], 4, 2, | ||
67 | &ff_asv2_level_tab[0][0], 4, 2, 1024); | ||
68 | 10 | } | |
69 | |||
70 | 2972884 | static inline int asv1_get_level(GetBitContext *gb) | |
71 | { | ||
72 | 2972884 | int code = get_vlc2(gb, level_vlc.table, ASV1_LEVEL_VLC_BITS, 1); | |
73 | |||
74 |
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2972884 | if (code == 3) |
75 | 429712 | return get_sbits(gb, 8); | |
76 | else | ||
77 | 2543172 | return code - 3; | |
78 | } | ||
79 | |||
80 | // get_vlc2() is big-endian in this file | ||
81 | 6010437 | static inline int asv2_get_vlc2(GetBitContext *gb, const VLCElem *table, int bits) | |
82 | { | ||
83 | unsigned int index; | ||
84 | int code, n; | ||
85 | |||
86 | 6010437 | OPEN_READER(re, gb); | |
87 | 6010437 | UPDATE_CACHE_LE(re, gb); | |
88 | |||
89 | 6010437 | index = SHOW_UBITS_LE(re, gb, bits); | |
90 | 6010437 | code = table[index].sym; | |
91 | 6010437 | n = table[index].len; | |
92 | 6010437 | LAST_SKIP_BITS(re, gb, n); | |
93 | |||
94 | 6010437 | CLOSE_READER(re, gb); | |
95 | |||
96 | 6010437 | return code; | |
97 | } | ||
98 | |||
99 | 3660409 | static inline int asv2_get_level(GetBitContext *gb) | |
100 | { | ||
101 | 3660409 | int code = asv2_get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS); | |
102 | |||
103 |
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3660409 | if (code == 31) |
104 | 613 | return (int8_t) get_bits_le(gb, 8); | |
105 | else | ||
106 | 3659796 | return code - 31; | |
107 | } | ||
108 | |||
109 | 359100 | static inline int asv1_decode_block(ASV1Context *a, int16_t block[64]) | |
110 | { | ||
111 | int i; | ||
112 | |||
113 | 359100 | block[0] = 8 * get_bits(&a->gb, 8); | |
114 | |||
115 |
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2128752 | for (i = 0; i < 11; i++) { |
116 | 2128752 | const int ccp = get_vlc2(&a->gb, ccp_vlc.table, CCP_VLC_BITS, 1); | |
117 | |||
118 |
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2128752 | if (ccp) { |
119 |
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1723494 | if (ccp == 16) |
120 | 359100 | break; | |
121 |
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1364394 | if (ccp < 0 || i >= 10) { |
122 | ✗ | av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n"); | |
123 | ✗ | return AVERROR_INVALIDDATA; | |
124 | } | ||
125 | |||
126 |
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1364394 | if (ccp & 8) |
127 | 759471 | block[a->scantable.permutated[4 * i + 0]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4; | |
128 |
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1364394 | if (ccp & 4) |
129 | 828513 | block[a->scantable.permutated[4 * i + 1]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4; | |
130 |
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1364394 | if (ccp & 2) |
131 | 781213 | block[a->scantable.permutated[4 * i + 2]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4; | |
132 |
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1364394 | if (ccp & 1) |
133 | 603687 | block[a->scantable.permutated[4 * i + 3]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4; | |
134 | } | ||
135 | } | ||
136 | |||
137 | 359100 | return 0; | |
138 | } | ||
139 | |||
140 | 359100 | static inline int asv2_decode_block(ASV1Context *a, int16_t block[64]) | |
141 | { | ||
142 | int i, count, ccp; | ||
143 | |||
144 | 359100 | count = get_bits_le(&a->gb, 4); | |
145 | |||
146 | 359100 | block[0] = 8 * get_bits_le(&a->gb, 8); | |
147 | |||
148 | 359100 | ccp = asv2_get_vlc2(&a->gb, dc_ccp_vlc.table, DC_CCP_VLC_BITS); | |
149 |
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359100 | if (ccp) { |
150 |
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329075 | if (ccp & 4) |
151 | 281504 | block[a->scantable.permutated[1]] = (asv2_get_level(&a->gb) * a->intra_matrix[1]) >> 4; | |
152 |
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329075 | if (ccp & 2) |
153 | 284503 | block[a->scantable.permutated[2]] = (asv2_get_level(&a->gb) * a->intra_matrix[2]) >> 4; | |
154 |
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329075 | if (ccp & 1) |
155 | 226812 | block[a->scantable.permutated[3]] = (asv2_get_level(&a->gb) * a->intra_matrix[3]) >> 4; | |
156 | } | ||
157 | |||
158 |
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2350028 | for (i = 1; i < count + 1; i++) { |
159 | 1990928 | const int ccp = asv2_get_vlc2(&a->gb, ac_ccp_vlc.table, AC_CCP_VLC_BITS); | |
160 | |||
161 |
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1990928 | if (ccp) { |
162 |
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1368743 | if (ccp & 8) |
163 | 968959 | block[a->scantable.permutated[4 * i + 0]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4; | |
164 |
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1368743 | if (ccp & 4) |
165 | 733048 | block[a->scantable.permutated[4 * i + 1]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4; | |
166 |
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1368743 | if (ccp & 2) |
167 | 667011 | block[a->scantable.permutated[4 * i + 2]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4; | |
168 |
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1368743 | if (ccp & 1) |
169 | 498572 | block[a->scantable.permutated[4 * i + 3]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4; | |
170 | } | ||
171 | } | ||
172 | |||
173 | 359100 | return 0; | |
174 | } | ||
175 | |||
176 | 119700 | static inline int decode_mb(ASV1Context *a, int16_t block[6][64]) | |
177 | { | ||
178 | int i, ret; | ||
179 | |||
180 | 119700 | a->bdsp.clear_blocks(block[0]); | |
181 | |||
182 |
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119700 | if (a->avctx->codec_id == AV_CODEC_ID_ASV1) { |
183 |
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418950 | for (i = 0; i < 6; i++) { |
184 |
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359100 | if ((ret = asv1_decode_block(a, block[i])) < 0) |
185 | ✗ | return ret; | |
186 | } | ||
187 | } else { | ||
188 |
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418950 | for (i = 0; i < 6; i++) { |
189 |
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359100 | if ((ret = asv2_decode_block(a, block[i])) < 0) |
190 | ✗ | return ret; | |
191 | } | ||
192 | } | ||
193 | 119700 | return 0; | |
194 | } | ||
195 | |||
196 | 119700 | static inline void idct_put(ASV1Context *a, AVFrame *frame, int mb_x, int mb_y) | |
197 | { | ||
198 | 119700 | int16_t(*block)[64] = a->block; | |
199 | 119700 | int linesize = frame->linesize[0]; | |
200 | |||
201 | 119700 | uint8_t *dest_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16; | |
202 | 119700 | uint8_t *dest_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8; | |
203 | 119700 | uint8_t *dest_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8; | |
204 | |||
205 | 119700 | a->idsp.idct_put(dest_y, linesize, block[0]); | |
206 | 119700 | a->idsp.idct_put(dest_y + 8, linesize, block[1]); | |
207 | 119700 | a->idsp.idct_put(dest_y + 8 * linesize, linesize, block[2]); | |
208 | 119700 | a->idsp.idct_put(dest_y + 8 * linesize + 8, linesize, block[3]); | |
209 | |||
210 |
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119700 | if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) { |
211 | 119700 | a->idsp.idct_put(dest_cb, frame->linesize[1], block[4]); | |
212 | 119700 | a->idsp.idct_put(dest_cr, frame->linesize[2], block[5]); | |
213 | } | ||
214 | 119700 | } | |
215 | |||
216 | 400 | static int decode_frame(AVCodecContext *avctx, AVFrame *p, | |
217 | int *got_frame, AVPacket *avpkt) | ||
218 | { | ||
219 | 400 | ASV1Context *const a = avctx->priv_data; | |
220 | 400 | const uint8_t *buf = avpkt->data; | |
221 | 400 | int buf_size = avpkt->size; | |
222 | int mb_x, mb_y, ret; | ||
223 | |||
224 |
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400 | if (buf_size * 8LL < a->mb_height * a->mb_width * 13LL) |
225 | ✗ | return AVERROR_INVALIDDATA; | |
226 | |||
227 |
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400 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
228 | ✗ | return ret; | |
229 | 400 | p->pict_type = AV_PICTURE_TYPE_I; | |
230 | 400 | p->key_frame = 1; | |
231 | |||
232 |
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400 | if (avctx->codec_id == AV_CODEC_ID_ASV1) { |
233 | 200 | av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size, | |
234 | buf_size); | ||
235 |
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200 | if (!a->bitstream_buffer) |
236 | ✗ | return AVERROR(ENOMEM); | |
237 | |||
238 | 200 | a->bbdsp.bswap_buf((uint32_t *) a->bitstream_buffer, | |
239 | (const uint32_t *) buf, buf_size / 4); | ||
240 | 200 | ret = init_get_bits8(&a->gb, a->bitstream_buffer, buf_size); | |
241 | } else { | ||
242 | 200 | ret = init_get_bits8_le(&a->gb, buf, buf_size); | |
243 | } | ||
244 |
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400 | if (ret < 0) |
245 | ✗ | return ret; | |
246 | |||
247 |
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6000 | for (mb_y = 0; mb_y < a->mb_height2; mb_y++) { |
248 |
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124800 | for (mb_x = 0; mb_x < a->mb_width2; mb_x++) { |
249 |
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119200 | if ((ret = decode_mb(a, a->block)) < 0) |
250 | ✗ | return ret; | |
251 | |||
252 | 119200 | idct_put(a, p, mb_x, mb_y); | |
253 | } | ||
254 | } | ||
255 | |||
256 |
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400 | if (a->mb_width2 != a->mb_width) { |
257 | 100 | mb_x = a->mb_width2; | |
258 |
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300 | for (mb_y = 0; mb_y < a->mb_height2; mb_y++) { |
259 |
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200 | if ((ret = decode_mb(a, a->block)) < 0) |
260 | ✗ | return ret; | |
261 | |||
262 | 200 | idct_put(a, p, mb_x, mb_y); | |
263 | } | ||
264 | } | ||
265 | |||
266 |
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400 | if (a->mb_height2 != a->mb_height) { |
267 | 100 | mb_y = a->mb_height2; | |
268 |
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400 | for (mb_x = 0; mb_x < a->mb_width; mb_x++) { |
269 |
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300 | if ((ret = decode_mb(a, a->block)) < 0) |
270 | ✗ | return ret; | |
271 | |||
272 | 300 | idct_put(a, p, mb_x, mb_y); | |
273 | } | ||
274 | } | ||
275 | |||
276 | 400 | *got_frame = 1; | |
277 | |||
278 | 400 | emms_c(); | |
279 | |||
280 | 400 | return (get_bits_count(&a->gb) + 31) / 32 * 4; | |
281 | } | ||
282 | |||
283 | 18 | static av_cold int decode_init(AVCodecContext *avctx) | |
284 | { | ||
285 | static AVOnce init_static_once = AV_ONCE_INIT; | ||
286 | 18 | ASV1Context *const a = avctx->priv_data; | |
287 |
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18 | const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2; |
288 | int i; | ||
289 | |||
290 |
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18 | if (avctx->extradata_size < 1) { |
291 | ✗ | av_log(avctx, AV_LOG_WARNING, "No extradata provided\n"); | |
292 | } | ||
293 | |||
294 | 18 | ff_asv_common_init(avctx); | |
295 | 18 | ff_blockdsp_init(&a->bdsp, avctx); | |
296 | 18 | ff_idctdsp_init(&a->idsp, avctx); | |
297 | 18 | ff_init_scantable(a->idsp.idct_permutation, &a->scantable, ff_asv_scantab); | |
298 | 18 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; | |
299 | |||
300 |
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18 | if (avctx->extradata_size < 1 || (a->inv_qscale = avctx->extradata[0]) == 0) { |
301 | ✗ | av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n"); | |
302 | ✗ | if (avctx->codec_id == AV_CODEC_ID_ASV1) | |
303 | ✗ | a->inv_qscale = 6; | |
304 | else | ||
305 | ✗ | a->inv_qscale = 10; | |
306 | } | ||
307 | |||
308 |
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1170 | for (i = 0; i < 64; i++) { |
309 | 1152 | int index = ff_asv_scantab[i]; | |
310 | |||
311 | 1152 | a->intra_matrix[i] = 64 * scale * ff_mpeg1_default_intra_matrix[index] / | |
312 | 1152 | a->inv_qscale; | |
313 | } | ||
314 | |||
315 | 18 | ff_thread_once(&init_static_once, init_vlcs); | |
316 | |||
317 | 18 | return 0; | |
318 | } | ||
319 | |||
320 | 9 | static av_cold int decode_end(AVCodecContext *avctx) | |
321 | { | ||
322 | 9 | ASV1Context *const a = avctx->priv_data; | |
323 | |||
324 | 9 | av_freep(&a->bitstream_buffer); | |
325 | 9 | a->bitstream_buffer_size = 0; | |
326 | |||
327 | 9 | return 0; | |
328 | } | ||
329 | |||
330 | #if CONFIG_ASV1_DECODER | ||
331 | const FFCodec ff_asv1_decoder = { | ||
332 | .p.name = "asv1", | ||
333 | .p.long_name = NULL_IF_CONFIG_SMALL("ASUS V1"), | ||
334 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
335 | .p.id = AV_CODEC_ID_ASV1, | ||
336 | .priv_data_size = sizeof(ASV1Context), | ||
337 | .init = decode_init, | ||
338 | .close = decode_end, | ||
339 | FF_CODEC_DECODE_CB(decode_frame), | ||
340 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
341 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, | ||
342 | }; | ||
343 | #endif | ||
344 | |||
345 | #if CONFIG_ASV2_DECODER | ||
346 | const FFCodec ff_asv2_decoder = { | ||
347 | .p.name = "asv2", | ||
348 | .p.long_name = NULL_IF_CONFIG_SMALL("ASUS V2"), | ||
349 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
350 | .p.id = AV_CODEC_ID_ASV2, | ||
351 | .priv_data_size = sizeof(ASV1Context), | ||
352 | .init = decode_init, | ||
353 | FF_CODEC_DECODE_CB(decode_frame), | ||
354 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
355 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, | ||
356 | }; | ||
357 | #endif | ||
358 |