1/* 2 * AVS encoding using the xavs library 3 * Copyright (C) 2010 Amanda, Y.N. Wu <amanda11192003@gmail.com> 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include <stdio.h> 23#include <stdlib.h> 24#include <string.h> 25#include <math.h> 26#include <stdint.h> 27#include <float.h> 28#include <xavs.h> 29#include "avcodec.h" 30#include "internal.h" 31#include "libavutil/internal.h" 32#include "libavutil/mem.h" 33#include "libavutil/opt.h" 34 35#define END_OF_STREAM 0x001 36 37#define XAVS_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */ 38#define XAVS_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */ 39#define XAVS_PART_B8X8 0x100 /* Analyze b16x8, b*/ 40 41typedef struct XavsContext { 42 AVClass *class; 43 xavs_param_t params; 44 xavs_t *enc; 45 xavs_picture_t pic; 46 uint8_t *sei; 47 int sei_size; 48 int end_of_stream; 49 float crf; 50 int cqp; 51 int b_bias; 52 float cplxblur; 53 int direct_pred; 54 int aud; 55 int fast_pskip; 56 int mbtree; 57 int mixed_refs; 58 59 int64_t *pts_buffer; 60 int out_frame_count; 61} XavsContext; 62 63static void XAVS_log(void *p, int level, const char *fmt, va_list args) 64{ 65 static const int level_map[] = { 66 [XAVS_LOG_ERROR] = AV_LOG_ERROR, 67 [XAVS_LOG_WARNING] = AV_LOG_WARNING, 68 [XAVS_LOG_INFO] = AV_LOG_INFO, 69 [XAVS_LOG_DEBUG] = AV_LOG_DEBUG 70 }; 71 72 if (level < 0 || level > XAVS_LOG_DEBUG) 73 return; 74 75 av_vlog(p, level_map[level], fmt, args); 76} 77 78static int encode_nals(AVCodecContext *ctx, AVPacket *pkt, 79 xavs_nal_t *nals, int nnal) 80{ 81 XavsContext *x4 = ctx->priv_data; 82 uint8_t *p; 83 int i, s, ret, size = x4->sei_size + FF_MIN_BUFFER_SIZE; 84 85 if (!nnal) 86 return 0; 87 88 for (i = 0; i < nnal; i++) 89 size += nals[i].i_payload; 90 91 if ((ret = ff_alloc_packet2(ctx, pkt, size)) < 0) 92 return ret; 93 p = pkt->data; 94 95 /* Write the SEI as part of the first frame. */ 96 if (x4->sei_size > 0 && nnal > 0) { 97 memcpy(p, x4->sei, x4->sei_size); 98 p += x4->sei_size; 99 x4->sei_size = 0; 100 } 101 102 for (i = 0; i < nnal; i++) { 103 s = xavs_nal_encode(p, &size, 1, nals + i); 104 if (s < 0) 105 return -1; 106 p += s; 107 } 108 pkt->size = p - pkt->data; 109 110 return 1; 111} 112 113static int XAVS_frame(AVCodecContext *avctx, AVPacket *pkt, 114 const AVFrame *frame, int *got_packet) 115{ 116 XavsContext *x4 = avctx->priv_data; 117 xavs_nal_t *nal; 118 int nnal, i, ret; 119 xavs_picture_t pic_out; 120 121 x4->pic.img.i_csp = XAVS_CSP_I420; 122 x4->pic.img.i_plane = 3; 123 124 if (frame) { 125 for (i = 0; i < 3; i++) { 126 x4->pic.img.plane[i] = frame->data[i]; 127 x4->pic.img.i_stride[i] = frame->linesize[i]; 128 } 129 130 x4->pic.i_pts = frame->pts; 131 x4->pic.i_type = XAVS_TYPE_AUTO; 132 x4->pts_buffer[avctx->frame_number % (avctx->max_b_frames+1)] = frame->pts; 133 } 134 135 if (xavs_encoder_encode(x4->enc, &nal, &nnal, 136 frame? &x4->pic: NULL, &pic_out) < 0) 137 return -1; 138 139 ret = encode_nals(avctx, pkt, nal, nnal); 140 141 if (ret < 0) 142 return -1; 143 144 if (!ret) { 145 if (!frame && !(x4->end_of_stream)) { 146 if ((ret = ff_alloc_packet2(avctx, pkt, 4)) < 0) 147 return ret; 148 149 pkt->data[0] = 0x0; 150 pkt->data[1] = 0x0; 151 pkt->data[2] = 0x01; 152 pkt->data[3] = 0xb1; 153 pkt->dts = 2*x4->pts_buffer[(x4->out_frame_count-1)%(avctx->max_b_frames+1)] - 154 x4->pts_buffer[(x4->out_frame_count-2)%(avctx->max_b_frames+1)]; 155 x4->end_of_stream = END_OF_STREAM; 156 *got_packet = 1; 157 } 158 return 0; 159 } 160 161 avctx->coded_frame->pts = pic_out.i_pts; 162 pkt->pts = pic_out.i_pts; 163 if (avctx->has_b_frames) { 164 if (!x4->out_frame_count) 165 pkt->dts = pkt->pts - (x4->pts_buffer[1] - x4->pts_buffer[0]); 166 else 167 pkt->dts = x4->pts_buffer[(x4->out_frame_count-1)%(avctx->max_b_frames+1)]; 168 } else 169 pkt->dts = pkt->pts; 170 171 switch (pic_out.i_type) { 172 case XAVS_TYPE_IDR: 173 case XAVS_TYPE_I: 174 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; 175 break; 176 case XAVS_TYPE_P: 177 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_P; 178 break; 179 case XAVS_TYPE_B: 180 case XAVS_TYPE_BREF: 181 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_B; 182 break; 183 } 184 185 /* There is no IDR frame in AVS JiZhun */ 186 /* Sequence header is used as a flag */ 187 if (pic_out.i_type == XAVS_TYPE_I) { 188 avctx->coded_frame->key_frame = 1; 189 pkt->flags |= AV_PKT_FLAG_KEY; 190 } 191 192 avctx->coded_frame->quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA; 193 194 x4->out_frame_count++; 195 *got_packet = ret; 196 return 0; 197} 198 199static av_cold int XAVS_close(AVCodecContext *avctx) 200{ 201 XavsContext *x4 = avctx->priv_data; 202 203 av_freep(&avctx->extradata); 204 av_free(x4->sei); 205 av_freep(&x4->pts_buffer); 206 207 if (x4->enc) 208 xavs_encoder_close(x4->enc); 209 210 av_frame_free(&avctx->coded_frame); 211 212 return 0; 213} 214 215static av_cold int XAVS_init(AVCodecContext *avctx) 216{ 217 XavsContext *x4 = avctx->priv_data; 218 219 x4->sei_size = 0; 220 xavs_param_default(&x4->params); 221 222 x4->params.pf_log = XAVS_log; 223 x4->params.p_log_private = avctx; 224 x4->params.i_keyint_max = avctx->gop_size; 225 if (avctx->bit_rate) { 226 x4->params.rc.i_bitrate = avctx->bit_rate / 1000; 227 x4->params.rc.i_rc_method = XAVS_RC_ABR; 228 } 229 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000; 230 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000; 231 x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1; 232 if (avctx->flags & CODEC_FLAG_PASS2) { 233 x4->params.rc.b_stat_read = 1; 234 } else { 235 if (x4->crf >= 0) { 236 x4->params.rc.i_rc_method = XAVS_RC_CRF; 237 x4->params.rc.f_rf_constant = x4->crf; 238 } else if (x4->cqp >= 0) { 239 x4->params.rc.i_rc_method = XAVS_RC_CQP; 240 x4->params.rc.i_qp_constant = x4->cqp; 241 } 242 } 243 244 if (x4->aud >= 0) 245 x4->params.b_aud = x4->aud; 246 if (x4->mbtree >= 0) 247 x4->params.rc.b_mb_tree = x4->mbtree; 248 if (x4->direct_pred >= 0) 249 x4->params.analyse.i_direct_mv_pred = x4->direct_pred; 250 if (x4->fast_pskip >= 0) 251 x4->params.analyse.b_fast_pskip = x4->fast_pskip; 252 if (x4->mixed_refs >= 0) 253 x4->params.analyse.b_mixed_references = x4->mixed_refs; 254 if (x4->b_bias != INT_MIN) 255 x4->params.i_bframe_bias = x4->b_bias; 256 if (x4->cplxblur >= 0) 257 x4->params.rc.f_complexity_blur = x4->cplxblur; 258 259 x4->params.i_bframe = avctx->max_b_frames; 260 /* cabac is not included in AVS JiZhun Profile */ 261 x4->params.b_cabac = 0; 262 263 x4->params.i_bframe_adaptive = avctx->b_frame_strategy; 264 265 avctx->has_b_frames = !!avctx->max_b_frames; 266 267 /* AVS doesn't allow B picture as reference */ 268 /* The max allowed reference frame number of B is 2 */ 269 x4->params.i_keyint_min = avctx->keyint_min; 270 if (x4->params.i_keyint_min > x4->params.i_keyint_max) 271 x4->params.i_keyint_min = x4->params.i_keyint_max; 272 273 x4->params.i_scenecut_threshold = avctx->scenechange_threshold; 274 275 // x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER; 276 277 x4->params.rc.i_qp_min = avctx->qmin; 278 x4->params.rc.i_qp_max = avctx->qmax; 279 x4->params.rc.i_qp_step = avctx->max_qdiff; 280 281 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */ 282 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */ 283 284 x4->params.i_frame_reference = avctx->refs; 285 286 x4->params.i_width = avctx->width; 287 x4->params.i_height = avctx->height; 288 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num; 289 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den; 290 /* This is only used for counting the fps */ 291 x4->params.i_fps_num = avctx->time_base.den; 292 x4->params.i_fps_den = avctx->time_base.num; 293 x4->params.analyse.inter = XAVS_ANALYSE_I8x8 |XAVS_ANALYSE_PSUB16x16| XAVS_ANALYSE_BSUB16x16; 294 295 switch (avctx->me_method) { 296 case ME_EPZS: 297 x4->params.analyse.i_me_method = XAVS_ME_DIA; 298 break; 299 case ME_HEX: 300 x4->params.analyse.i_me_method = XAVS_ME_HEX; 301 break; 302 case ME_UMH: 303 x4->params.analyse.i_me_method = XAVS_ME_UMH; 304 break; 305 case ME_FULL: 306 x4->params.analyse.i_me_method = XAVS_ME_ESA; 307 break; 308 case ME_TESA: 309 x4->params.analyse.i_me_method = XAVS_ME_TESA; 310 break; 311 default: 312 x4->params.analyse.i_me_method = XAVS_ME_HEX; 313 } 314 315 x4->params.analyse.i_me_range = avctx->me_range; 316 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality; 317 318 x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA; 319 /* AVS P2 only enables 8x8 transform */ 320 x4->params.analyse.b_transform_8x8 = 1; //avctx->flags2 & CODEC_FLAG2_8X8DCT; 321 322 x4->params.analyse.i_trellis = avctx->trellis; 323 x4->params.analyse.i_noise_reduction = avctx->noise_reduction; 324 325 if (avctx->level > 0) 326 x4->params.i_level_idc = avctx->level; 327 328 x4->params.rc.f_rate_tolerance = 329 (float)avctx->bit_rate_tolerance/avctx->bit_rate; 330 331 if ((avctx->rc_buffer_size) && 332 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) { 333 x4->params.rc.f_vbv_buffer_init = 334 (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size; 335 } else 336 x4->params.rc.f_vbv_buffer_init = 0.9; 337 338 /* TAG:do we have MB tree RC method */ 339 /* what is the RC method we are now using? Default NO */ 340 x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor); 341 x4->params.rc.f_pb_factor = avctx->b_quant_factor; 342 x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset; 343 344 x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR; 345 x4->params.i_log_level = XAVS_LOG_DEBUG; 346 x4->params.i_threads = avctx->thread_count; 347 x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT; 348 349 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) 350 x4->params.b_repeat_headers = 0; 351 352 x4->enc = xavs_encoder_open(&x4->params); 353 if (!x4->enc) 354 return -1; 355 356 if (!(x4->pts_buffer = av_mallocz_array((avctx->max_b_frames+1), sizeof(*x4->pts_buffer)))) 357 return AVERROR(ENOMEM); 358 359 avctx->coded_frame = av_frame_alloc(); 360 if (!avctx->coded_frame) 361 return AVERROR(ENOMEM); 362 363 /* TAG: Do we have GLOBAL HEADER in AVS */ 364 /* We Have PPS and SPS in AVS */ 365 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { 366 xavs_nal_t *nal; 367 int nnal, s, i, size; 368 uint8_t *p; 369 370 s = xavs_encoder_headers(x4->enc, &nal, &nnal); 371 372 avctx->extradata = p = av_malloc(s); 373 for (i = 0; i < nnal; i++) { 374 /* Don't put the SEI in extradata. */ 375 if (nal[i].i_type == NAL_SEI) { 376 x4->sei = av_malloc( 5 + nal[i].i_payload * 4 / 3 ); 377 if (xavs_nal_encode(x4->sei, &x4->sei_size, 1, nal + i) < 0) 378 return -1; 379 380 continue; 381 } 382 size = xavs_nal_encode(p, &s, 1, nal + i); 383 if (size < 0) 384 return -1; 385 p += size; 386 } 387 avctx->extradata_size = p - avctx->extradata; 388 } 389 return 0; 390} 391 392#define OFFSET(x) offsetof(XavsContext, x) 393#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM 394static const AVOption options[] = { 395 { "crf", "Select the quality for constant quality mode", OFFSET(crf), AV_OPT_TYPE_FLOAT, {.dbl = -1 }, -1, FLT_MAX, VE }, 396 { "qp", "Constant quantization parameter rate control method",OFFSET(cqp), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, INT_MAX, VE }, 397 { "b-bias", "Influences how often B-frames are used", OFFSET(b_bias), AV_OPT_TYPE_INT, {.i64 = INT_MIN}, INT_MIN, INT_MAX, VE }, 398 { "cplxblur", "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), AV_OPT_TYPE_FLOAT, {.dbl = -1 }, -1, FLT_MAX, VE}, 399 { "direct-pred", "Direct MV prediction mode", OFFSET(direct_pred), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, INT_MAX, VE, "direct-pred" }, 400 { "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_NONE }, 0, 0, VE, "direct-pred" }, 401 { "spatial", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_SPATIAL }, 0, 0, VE, "direct-pred" }, 402 { "temporal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" }, 403 { "auto", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_AUTO }, 0, 0, VE, "direct-pred" }, 404 { "aud", "Use access unit delimiters.", OFFSET(aud), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 1, VE}, 405 { "mbtree", "Use macroblock tree ratecontrol.", OFFSET(mbtree), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 1, VE}, 406 { "mixed-refs", "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, VE }, 407 { "fast-pskip", NULL, OFFSET(fast_pskip), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 1, VE}, 408 { NULL }, 409}; 410 411static const AVClass xavs_class = { 412 .class_name = "libxavs", 413 .item_name = av_default_item_name, 414 .option = options, 415 .version = LIBAVUTIL_VERSION_INT, 416}; 417 418static const AVCodecDefault xavs_defaults[] = { 419 { "b", "0" }, 420 { NULL }, 421}; 422 423AVCodec ff_libxavs_encoder = { 424 .name = "libxavs", 425 .long_name = NULL_IF_CONFIG_SMALL("libxavs Chinese AVS (Audio Video Standard)"), 426 .type = AVMEDIA_TYPE_VIDEO, 427 .id = AV_CODEC_ID_CAVS, 428 .priv_data_size = sizeof(XavsContext), 429 .init = XAVS_init, 430 .encode2 = XAVS_frame, 431 .close = XAVS_close, 432 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS, 433 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, 434 .priv_class = &xavs_class, 435 .defaults = xavs_defaults, 436}; 437