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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 encoder. | |
24 | */ | |
25 | ||
26 | #include "libavutil/attributes.h" | |
27 | #include "libavutil/mem.h" | |
28 | ||
29 | #include "aandcttab.h" | |
30 | #include "asv.h" | |
31 | #include "avcodec.h" | |
32 | #include "dct.h" | |
33 | #include "fdctdsp.h" | |
34 | #include "internal.h" | |
35 | #include "mathops.h" | |
36 | #include "mpeg12data.h" | |
37 | ||
38 | static inline void asv2_put_bits(PutBitContext *pb, int n, int v) | |
39 | { | |
40 | put_bits(pb, n, ff_reverse[v << (8 - n)]); | |
41 | } | |
42 | ||
43 | static inline void asv1_put_level(PutBitContext *pb, int level) | |
44 | { | |
45 | unsigned int index = level + 3; | |
46 | ||
47 | if (index <= 6) { | |
48 | put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]); | |
49 | } else { | |
50 | put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]); | |
51 | put_sbits(pb, 8, level); | |
52 | } | |
53 | } | |
54 | ||
55 | static inline void asv2_put_level(PutBitContext *pb, int level) | |
56 | { | |
57 | unsigned int index = level + 31; | |
58 | ||
59 | if (index <= 62) { | |
60 | put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]); | |
61 | } else { | |
62 | put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]); | |
63 | asv2_put_bits(pb, 8, level & 0xFF); | |
64 | } | |
65 | } | |
66 | ||
67 | static inline void asv1_encode_block(ASV1Context *a, int16_t block[64]) | |
68 | { | |
69 | int i; | |
70 | int nc_count = 0; | |
71 | ||
72 | put_bits(&a->pb, 8, (block[0] + 32) >> 6); | |
73 | block[0] = 0; | |
74 | ||
75 | for (i = 0; i < 10; i++) { | |
76 | const int index = ff_asv_scantab[4 * i]; | |
77 | int ccp = 0; | |
78 | ||
79 | if ((block[index + 0] = (block[index + 0] * | |
80 | a->q_intra_matrix[index + 0] + (1 << 15)) >> 16)) | |
81 | ccp |= 8; | |
82 | if ((block[index + 8] = (block[index + 8] * | |
83 | a->q_intra_matrix[index + 8] + (1 << 15)) >> 16)) | |
84 | ccp |= 4; | |
85 | if ((block[index + 1] = (block[index + 1] * | |
86 | a->q_intra_matrix[index + 1] + (1 << 15)) >> 16)) | |
87 | ccp |= 2; | |
88 | if ((block[index + 9] = (block[index + 9] * | |
89 | a->q_intra_matrix[index + 9] + (1 << 15)) >> 16)) | |
90 | ccp |= 1; | |
91 | ||
92 | if (ccp) { | |
93 | for (; nc_count; nc_count--) | |
94 | put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]); | |
95 | ||
96 | put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]); | |
97 | ||
98 | if (ccp & 8) | |
99 | asv1_put_level(&a->pb, block[index + 0]); | |
100 | if (ccp & 4) | |
101 | asv1_put_level(&a->pb, block[index + 8]); | |
102 | if (ccp & 2) | |
103 | asv1_put_level(&a->pb, block[index + 1]); | |
104 | if (ccp & 1) | |
105 | asv1_put_level(&a->pb, block[index + 9]); | |
106 | } else { | |
107 | nc_count++; | |
108 | } | |
109 | } | |
110 | put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]); | |
111 | } | |
112 | ||
113 | static inline void asv2_encode_block(ASV1Context *a, int16_t block[64]) | |
114 | { | |
115 | int i; | |
116 | int count = 0; | |
117 | ||
118 | for (count = 63; count > 3; count--) { | |
119 | const int index = ff_asv_scantab[count]; | |
120 | if ((block[index] * a->q_intra_matrix[index] + (1 << 15)) >> 16) | |
121 | break; | |
122 | } | |
123 | ||
124 | count >>= 2; | |
125 | ||
126 | asv2_put_bits(&a->pb, 4, count); | |
127 | asv2_put_bits(&a->pb, 8, (block[0] + 32) >> 6); | |
128 | block[0] = 0; | |
129 | ||
130 | for (i = 0; i <= count; i++) { | |
131 | const int index = ff_asv_scantab[4 * i]; | |
132 | int ccp = 0; | |
133 | ||
134 | if ((block[index + 0] = (block[index + 0] * | |
135 | a->q_intra_matrix[index + 0] + (1 << 15)) >> 16)) | |
136 | ccp |= 8; | |
137 | if ((block[index + 8] = (block[index + 8] * | |
138 | a->q_intra_matrix[index + 8] + (1 << 15)) >> 16)) | |
139 | ccp |= 4; | |
140 | if ((block[index + 1] = (block[index + 1] * | |
141 | a->q_intra_matrix[index + 1] + (1 << 15)) >> 16)) | |
142 | ccp |= 2; | |
143 | if ((block[index + 9] = (block[index + 9] * | |
144 | a->q_intra_matrix[index + 9] + (1 << 15)) >> 16)) | |
145 | ccp |= 1; | |
146 | ||
147 | av_assert2(i || ccp < 8); | |
148 | if (i) | |
149 | put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]); | |
150 | else | |
151 | put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]); | |
152 | ||
153 | if (ccp) { | |
154 | if (ccp & 8) | |
155 | asv2_put_level(&a->pb, block[index + 0]); | |
156 | if (ccp & 4) | |
157 | asv2_put_level(&a->pb, block[index + 8]); | |
158 | if (ccp & 2) | |
159 | asv2_put_level(&a->pb, block[index + 1]); | |
160 | if (ccp & 1) | |
161 | asv2_put_level(&a->pb, block[index + 9]); | |
162 | } | |
163 | } | |
164 | } | |
165 | ||
166 | #define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8) | |
167 | ||
168 | static inline int encode_mb(ASV1Context *a, int16_t block[6][64]) | |
169 | { | |
170 | int i; | |
171 | ||
172 | if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb) >> 3) < MAX_MB_SIZE) { | |
173 | av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n"); | |
174 | return -1; | |
175 | } | |
176 | ||
177 | if (a->avctx->codec_id == AV_CODEC_ID_ASV1) { | |
178 | for (i = 0; i < 6; i++) | |
179 | asv1_encode_block(a, block[i]); | |
180 | } else { | |
181 | for (i = 0; i < 6; i++) | |
182 | asv2_encode_block(a, block[i]); | |
183 | } | |
184 | return 0; | |
185 | } | |
186 | ||
187 | static inline void dct_get(ASV1Context *a, const AVFrame *frame, | |
188 | int mb_x, int mb_y) | |
189 | { | |
190 | int16_t (*block)[64] = a->block; | |
191 | int linesize = frame->linesize[0]; | |
192 | int i; | |
193 | ||
194 | uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16; | |
195 | uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8; | |
196 | uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8; | |
197 | ||
198 | a->pdsp.get_pixels(block[0], ptr_y, linesize); | |
199 | a->pdsp.get_pixels(block[1], ptr_y + 8, linesize); | |
200 | a->pdsp.get_pixels(block[2], ptr_y + 8 * linesize, linesize); | |
201 | a->pdsp.get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize); | |
202 | for (i = 0; i < 4; i++) | |
203 | a->fdsp.fdct(block[i]); | |
204 | ||
205 | if (!(a->avctx->flags & CODEC_FLAG_GRAY)) { | |
206 | a->pdsp.get_pixels(block[4], ptr_cb, frame->linesize[1]); | |
207 | a->pdsp.get_pixels(block[5], ptr_cr, frame->linesize[2]); | |
208 | for (i = 4; i < 6; i++) | |
209 | a->fdsp.fdct(block[i]); | |
210 | } | |
211 | } | |
212 | ||
213 | static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, | |
214 | const AVFrame *pict, int *got_packet) | |
215 | { | |
216 | ASV1Context *const a = avctx->priv_data; | |
217 | int size, ret; | |
218 | int mb_x, mb_y; | |
219 | ||
220 | if (pict->width % 16 || pict->height % 16) { | |
221 | AVFrame *clone = av_frame_alloc(); | |
222 | int i; | |
223 | ||
224 | if (!clone) | |
225 | return AVERROR(ENOMEM); | |
226 | clone->format = pict->format; | |
227 | clone->width = FFALIGN(pict->width, 16); | |
228 | clone->height = FFALIGN(pict->height, 16); | |
229 | ret = av_frame_get_buffer(clone, 32); | |
230 | if (ret < 0) { | |
231 | av_frame_free(&clone); | |
232 | return ret; | |
233 | } | |
234 | ||
235 | ret = av_frame_copy(clone, pict); | |
236 | if (ret < 0) { | |
237 | av_frame_free(&clone); | |
238 | return ret; | |
239 | } | |
240 | ||
241 | for (i = 0; i<3; i++) { | |
242 | int x, y; | |
243 | int w = FF_CEIL_RSHIFT(pict->width, !!i); | |
244 | int h = FF_CEIL_RSHIFT(pict->height, !!i); | |
245 | int w2 = FF_CEIL_RSHIFT(clone->width, !!i); | |
246 | int h2 = FF_CEIL_RSHIFT(clone->height, !!i); | |
247 | for (y=0; y<h; y++) | |
248 | for (x=w; x<w2; x++) | |
249 | clone->data[i][x + y*clone->linesize[i]] = | |
250 | clone->data[i][w - 1 + y*clone->linesize[i]]; | |
251 | for (y=h; y<h2; y++) | |
252 | for (x=0; x<w2; x++) | |
253 | clone->data[i][x + y*clone->linesize[i]] = | |
254 | clone->data[i][x + (h-1)*clone->linesize[i]]; | |
255 | } | |
256 | ret = encode_frame(avctx, pkt, clone, got_packet); | |
257 | ||
258 | av_frame_free(&clone); | |
259 | return ret; | |
260 | } | |
261 | ||
262 | if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height * a->mb_width * MAX_MB_SIZE + | |
263 | FF_MIN_BUFFER_SIZE)) < 0) | |
264 | return ret; | |
265 | ||
266 | init_put_bits(&a->pb, pkt->data, pkt->size); | |
267 | ||
268 | for (mb_y = 0; mb_y < a->mb_height2; mb_y++) { | |
269 | for (mb_x = 0; mb_x < a->mb_width2; mb_x++) { | |
270 | dct_get(a, pict, mb_x, mb_y); | |
271 | encode_mb(a, a->block); | |
272 | } | |
273 | } | |
274 | ||
275 | if (a->mb_width2 != a->mb_width) { | |
276 | mb_x = a->mb_width2; | |
277 | for (mb_y = 0; mb_y < a->mb_height2; mb_y++) { | |
278 | dct_get(a, pict, mb_x, mb_y); | |
279 | encode_mb(a, a->block); | |
280 | } | |
281 | } | |
282 | ||
283 | if (a->mb_height2 != a->mb_height) { | |
284 | mb_y = a->mb_height2; | |
285 | for (mb_x = 0; mb_x < a->mb_width; mb_x++) { | |
286 | dct_get(a, pict, mb_x, mb_y); | |
287 | encode_mb(a, a->block); | |
288 | } | |
289 | } | |
290 | emms_c(); | |
291 | ||
292 | avpriv_align_put_bits(&a->pb); | |
293 | while (put_bits_count(&a->pb) & 31) | |
294 | put_bits(&a->pb, 8, 0); | |
295 | ||
296 | size = put_bits_count(&a->pb) / 32; | |
297 | ||
298 | if (avctx->codec_id == AV_CODEC_ID_ASV1) { | |
299 | a->bbdsp.bswap_buf((uint32_t *) pkt->data, | |
300 | (uint32_t *) pkt->data, size); | |
301 | } else { | |
302 | int i; | |
303 | for (i = 0; i < 4 * size; i++) | |
304 | pkt->data[i] = ff_reverse[pkt->data[i]]; | |
305 | } | |
306 | ||
307 | pkt->size = size * 4; | |
308 | pkt->flags |= AV_PKT_FLAG_KEY; | |
309 | *got_packet = 1; | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | static av_cold int encode_init(AVCodecContext *avctx) | |
315 | { | |
316 | ASV1Context *const a = avctx->priv_data; | |
317 | int i; | |
318 | const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2; | |
319 | ||
320 | ff_asv_common_init(avctx); | |
321 | ff_fdctdsp_init(&a->fdsp, avctx); | |
322 | ff_pixblockdsp_init(&a->pdsp, avctx); | |
323 | ||
324 | if (avctx->global_quality <= 0) | |
325 | avctx->global_quality = 4 * FF_QUALITY_SCALE; | |
326 | ||
327 | a->inv_qscale = (32 * scale * FF_QUALITY_SCALE + | |
328 | avctx->global_quality / 2) / avctx->global_quality; | |
329 | ||
330 | avctx->extradata = av_mallocz(8); | |
331 | avctx->extradata_size = 8; | |
332 | ((uint32_t *) avctx->extradata)[0] = av_le2ne32(a->inv_qscale); | |
333 | ((uint32_t *) avctx->extradata)[1] = av_le2ne32(AV_RL32("ASUS")); | |
334 | ||
335 | for (i = 0; i < 64; i++) { | |
336 | if (a->fdsp.fdct == ff_fdct_ifast) { | |
337 | int q = 32LL * scale * ff_mpeg1_default_intra_matrix[i] * ff_aanscales[i]; | |
338 | a->q_intra_matrix[i] = (((int64_t)a->inv_qscale << 30) + q / 2) / q; | |
339 | } else { | |
340 | int q = 32 * scale * ff_mpeg1_default_intra_matrix[i]; | |
341 | a->q_intra_matrix[i] = ((a->inv_qscale << 16) + q / 2) / q; | |
342 | } | |
343 | } | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
348 | #if CONFIG_ASV1_ENCODER | |
349 | AVCodec ff_asv1_encoder = { | |
350 | .name = "asv1", | |
351 | .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"), | |
352 | .type = AVMEDIA_TYPE_VIDEO, | |
353 | .id = AV_CODEC_ID_ASV1, | |
354 | .priv_data_size = sizeof(ASV1Context), | |
355 | .init = encode_init, | |
356 | .encode2 = encode_frame, | |
357 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, | |
358 | AV_PIX_FMT_NONE }, | |
359 | }; | |
360 | #endif | |
361 | ||
362 | #if CONFIG_ASV2_ENCODER | |
363 | AVCodec ff_asv2_encoder = { | |
364 | .name = "asv2", | |
365 | .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"), | |
366 | .type = AVMEDIA_TYPE_VIDEO, | |
367 | .id = AV_CODEC_ID_ASV2, | |
368 | .priv_data_size = sizeof(ASV1Context), | |
369 | .init = encode_init, | |
370 | .encode2 = encode_frame, | |
371 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, | |
372 | AV_PIX_FMT_NONE }, | |
373 | }; | |
374 | #endif |