| 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 |