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| 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 <xavs.h> |
| 28 | +#include "avcodec.h" |
| 29 | + |
| 30 | +#define END_OF_STREAM 0x001 |
| 31 | + |
| 32 | +#define XAVS_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */ |
| 33 | +#define XAVS_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */ |
| 34 | +#define XAVS_PART_B8X8 0x100 /* Analyze b16x8, b*/ |
| 35 | + |
| 36 | +typedef struct XavsContext { |
| 37 | + xavs_param_t params; |
| 38 | + xavs_t *enc; |
| 39 | + xavs_picture_t pic; |
| 40 | + uint8_t *sei; |
| 41 | + int sei_size; |
| 42 | + AVFrame out_pic; |
| 43 | + int end_of_stream; |
| 44 | +} XavsContext; |
| 45 | + |
| 46 | +static void XAVS_log(void *p, int level, const char *fmt, va_list args) |
| 47 | +{ |
| 48 | + static const int level_map[] = { |
| 49 | + [XAVS_LOG_ERROR] = AV_LOG_ERROR, |
| 50 | + [XAVS_LOG_WARNING] = AV_LOG_WARNING, |
| 51 | + [XAVS_LOG_INFO] = AV_LOG_INFO, |
| 52 | + [XAVS_LOG_DEBUG] = AV_LOG_DEBUG |
| 53 | + }; |
| 54 | + |
| 55 | + if (level < 0 || level > XAVS_LOG_DEBUG) |
| 56 | + return; |
| 57 | + |
| 58 | + av_vlog(p, level_map[level], fmt, args); |
| 59 | +} |
| 60 | + |
| 61 | +static int encode_nals(AVCodecContext *ctx, uint8_t *buf, |
| 62 | + int size, xavs_nal_t *nals, |
| 63 | + int nnal, int skip_sei) |
| 64 | +{ |
| 65 | + XavsContext *x4 = ctx->priv_data; |
| 66 | + uint8_t *p = buf; |
| 67 | + int i, s; |
| 68 | + |
| 69 | + /* Write the SEI as part of the first frame. */ |
| 70 | + if (x4->sei_size > 0 && nnal > 0) { |
| 71 | + memcpy(p, x4->sei, x4->sei_size); |
| 72 | + p += x4->sei_size; |
| 73 | + x4->sei_size = 0; |
| 74 | + } |
| 75 | + |
| 76 | + for (i = 0; i < nnal; i++) { |
| 77 | + /* Don't put the SEI in extradata. */ |
| 78 | + if (skip_sei && nals[i].i_type == NAL_SEI) { |
| 79 | + x4->sei = av_malloc( 5 + nals[i].i_payload * 4 / 3 ); |
| 80 | + if (xavs_nal_encode(x4->sei, &x4->sei_size, 1, nals + i) < 0) |
| 81 | + return -1; |
| 82 | + |
| 83 | + continue; |
| 84 | + } |
| 85 | + s = xavs_nal_encode(p, &size, 1, nals + i); |
| 86 | + if (s < 0) |
| 87 | + return -1; |
| 88 | + p += s; |
| 89 | + } |
| 90 | + |
| 91 | + return p - buf; |
| 92 | +} |
| 93 | + |
| 94 | +static int XAVS_frame(AVCodecContext *ctx, uint8_t *buf, |
| 95 | + int bufsize, void *data) |
| 96 | +{ |
| 97 | + XavsContext *x4 = ctx->priv_data; |
| 98 | + AVFrame *frame = data; |
| 99 | + xavs_nal_t *nal; |
| 100 | + int nnal, i; |
| 101 | + xavs_picture_t pic_out; |
| 102 | + |
| 103 | + x4->pic.img.i_csp = XAVS_CSP_I420; |
| 104 | + x4->pic.img.i_plane = 3; |
| 105 | + |
| 106 | + if (frame) { |
| 107 | + for (i = 0; i < 3; i++) { |
| 108 | + x4->pic.img.plane[i] = frame->data[i]; |
| 109 | + x4->pic.img.i_stride[i] = frame->linesize[i]; |
| 110 | + } |
| 111 | + |
| 112 | + x4->pic.i_pts = frame->pts; |
| 113 | + x4->pic.i_type = XAVS_TYPE_AUTO; |
| 114 | + } |
| 115 | + |
| 116 | + if (xavs_encoder_encode(x4->enc, &nal, &nnal, |
| 117 | + frame? &x4->pic: NULL, &pic_out) < 0) |
| 118 | + return -1; |
| 119 | + |
| 120 | + bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0); |
| 121 | + |
| 122 | + if (bufsize < 0) |
| 123 | + return -1; |
| 124 | + |
| 125 | + if (!bufsize && !frame && !(x4->end_of_stream)){ |
| 126 | + buf[bufsize] = 0x0; |
| 127 | + buf[bufsize+1] = 0x0; |
| 128 | + buf[bufsize+2] = 0x01; |
| 129 | + buf[bufsize+3] = 0xb1; |
| 130 | + bufsize += 4; |
| 131 | + x4->end_of_stream = END_OF_STREAM; |
| 132 | + return bufsize; |
| 133 | + } |
| 134 | + /* FIXME: libxavs now provides DTS */ |
| 135 | + /* but AVFrame doesn't have a field for it. */ |
| 136 | + x4->out_pic.pts = pic_out.i_pts; |
| 137 | + |
| 138 | + switch (pic_out.i_type) { |
| 139 | + case XAVS_TYPE_IDR: |
| 140 | + case XAVS_TYPE_I: |
| 141 | + x4->out_pic.pict_type = FF_I_TYPE; |
| 142 | + break; |
| 143 | + case XAVS_TYPE_P: |
| 144 | + x4->out_pic.pict_type = FF_P_TYPE; |
| 145 | + break; |
| 146 | + case XAVS_TYPE_B: |
| 147 | + case XAVS_TYPE_BREF: |
| 148 | + x4->out_pic.pict_type = FF_B_TYPE; |
| 149 | + break; |
| 150 | + } |
| 151 | + |
| 152 | + /* There is no IDR frame in AVS JiZhun */ |
| 153 | + /* Sequence header is used as a flag */ |
| 154 | + x4->out_pic.key_frame = pic_out.i_type == XAVS_TYPE_I; |
| 155 | + |
| 156 | + x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA; |
| 157 | + |
| 158 | + return bufsize; |
| 159 | +} |
| 160 | + |
| 161 | +static av_cold int XAVS_close(AVCodecContext *avctx) |
| 162 | +{ |
| 163 | + XavsContext *x4 = avctx->priv_data; |
| 164 | + |
| 165 | + av_freep(&avctx->extradata); |
| 166 | + av_free(x4->sei); |
| 167 | + |
| 168 | + if (x4->enc) |
| 169 | + xavs_encoder_close(x4->enc); |
| 170 | + |
| 171 | + return 0; |
| 172 | +} |
| 173 | + |
| 174 | +static av_cold int XAVS_init(AVCodecContext *avctx) |
| 175 | +{ |
| 176 | + XavsContext *x4 = avctx->priv_data; |
| 177 | + |
| 178 | + x4->sei_size = 0; |
| 179 | + xavs_param_default(&x4->params); |
| 180 | + |
| 181 | + x4->params.pf_log = XAVS_log; |
| 182 | + x4->params.p_log_private = avctx; |
| 183 | + x4->params.i_keyint_max = avctx->gop_size; |
| 184 | + x4->params.rc.i_bitrate = avctx->bit_rate / 1000; |
| 185 | + x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000; |
| 186 | + x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000; |
| 187 | + x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1; |
| 188 | + if (avctx->flags & CODEC_FLAG_PASS2) { |
| 189 | + x4->params.rc.b_stat_read = 1; |
| 190 | + } else { |
| 191 | + if (avctx->crf) { |
| 192 | + x4->params.rc.i_rc_method = XAVS_RC_CRF; |
| 193 | + x4->params.rc.f_rf_constant = avctx->crf; |
| 194 | + } else if (avctx->cqp > -1) { |
| 195 | + x4->params.rc.i_rc_method = XAVS_RC_CQP; |
| 196 | + x4->params.rc.i_qp_constant = avctx->cqp; |
| 197 | + } |
| 198 | + } |
| 199 | + |
| 200 | + /* if neither crf nor cqp modes are selected we have to enable the RC */ |
| 201 | + /* we do it this way because we cannot check if the bitrate has been set */ |
| 202 | + if (!(avctx->crf || (avctx->cqp > -1))) |
| 203 | + x4->params.rc.i_rc_method = XAVS_RC_ABR; |
| 204 | + |
| 205 | + x4->params.i_bframe = avctx->max_b_frames; |
| 206 | + /* cabac is not included in AVS JiZhun Profile */ |
| 207 | + x4->params.b_cabac = 0; |
| 208 | + |
| 209 | + x4->params.i_bframe_adaptive = avctx->b_frame_strategy; |
| 210 | + x4->params.i_bframe_bias = avctx->bframebias; |
| 211 | + |
| 212 | + avctx->has_b_frames = !!avctx->max_b_frames; |
| 213 | + |
| 214 | + /* AVS doesn't allow B picture as reference */ |
| 215 | + /* The max allowed reference frame number of B is 2 */ |
| 216 | + x4->params.i_keyint_min = avctx->keyint_min; |
| 217 | + if (x4->params.i_keyint_min > x4->params.i_keyint_max) |
| 218 | + x4->params.i_keyint_min = x4->params.i_keyint_max; |
| 219 | + |
| 220 | + x4->params.i_scenecut_threshold = avctx->scenechange_threshold; |
| 221 | + |
| 222 | + // x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER; |
| 223 | + x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha; |
| 224 | + x4->params.i_deblocking_filter_beta = avctx->deblockbeta; |
| 225 | + |
| 226 | + x4->params.rc.i_qp_min = avctx->qmin; |
| 227 | + x4->params.rc.i_qp_max = avctx->qmax; |
| 228 | + x4->params.rc.i_qp_step = avctx->max_qdiff; |
| 229 | + |
| 230 | + x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */ |
| 231 | + x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */ |
| 232 | + x4->params.rc.f_complexity_blur = avctx->complexityblur; |
| 233 | + |
| 234 | + x4->params.i_frame_reference = avctx->refs; |
| 235 | + |
| 236 | + x4->params.i_width = avctx->width; |
| 237 | + x4->params.i_height = avctx->height; |
| 238 | + x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num; |
| 239 | + x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den; |
| 240 | + /* This is only used for counting the fps */ |
| 241 | + x4->params.i_fps_num = avctx->time_base.den; |
| 242 | + x4->params.i_fps_den = avctx->time_base.num; |
| 243 | + x4->params.analyse.inter = XAVS_ANALYSE_I8x8 |XAVS_ANALYSE_PSUB16x16| XAVS_ANALYSE_BSUB16x16; |
| 244 | + if (avctx->partitions) { |
| 245 | + if (avctx->partitions & XAVS_PART_I8X8) |
| 246 | + x4->params.analyse.inter |= XAVS_ANALYSE_I8x8; |
| 247 | + |
| 248 | + if (avctx->partitions & XAVS_PART_P8X8) |
| 249 | + x4->params.analyse.inter |= XAVS_ANALYSE_PSUB16x16; |
| 250 | + |
| 251 | + if (avctx->partitions & XAVS_PART_B8X8) |
| 252 | + x4->params.analyse.inter |= XAVS_ANALYSE_BSUB16x16; |
| 253 | + } |
| 254 | + |
| 255 | + x4->params.analyse.i_direct_mv_pred = avctx->directpred; |
| 256 | + |
| 257 | + x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED; |
| 258 | + |
| 259 | + switch (avctx->me_method) { |
| 260 | + case ME_EPZS: |
| 261 | + x4->params.analyse.i_me_method = XAVS_ME_DIA; |
| 262 | + break; |
| 263 | + case ME_HEX: |
| 264 | + x4->params.analyse.i_me_method = XAVS_ME_HEX; |
| 265 | + break; |
| 266 | + case ME_UMH: |
| 267 | + x4->params.analyse.i_me_method = XAVS_ME_UMH; |
| 268 | + break; |
| 269 | + case ME_FULL: |
| 270 | + x4->params.analyse.i_me_method = XAVS_ME_ESA; |
| 271 | + break; |
| 272 | + case ME_TESA: |
| 273 | + x4->params.analyse.i_me_method = XAVS_ME_TESA; |
| 274 | + break; |
| 275 | + default: |
| 276 | + x4->params.analyse.i_me_method = XAVS_ME_HEX; |
| 277 | + } |
| 278 | + |
| 279 | + x4->params.analyse.i_me_range = avctx->me_range; |
| 280 | + x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality; |
| 281 | + |
| 282 | + x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS; |
| 283 | + x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA; |
| 284 | + /* AVS P2 only enables 8x8 transform */ |
| 285 | + x4->params.analyse.b_transform_8x8 = 1; //avctx->flags2 & CODEC_FLAG2_8X8DCT; |
| 286 | + x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP; |
| 287 | + |
| 288 | + x4->params.analyse.i_trellis = avctx->trellis; |
| 289 | + x4->params.analyse.i_noise_reduction = avctx->noise_reduction; |
| 290 | + |
| 291 | + if (avctx->level > 0) |
| 292 | + x4->params.i_level_idc = avctx->level; |
| 293 | + |
| 294 | + x4->params.rc.f_rate_tolerance = |
| 295 | + (float)avctx->bit_rate_tolerance/avctx->bit_rate; |
| 296 | + |
| 297 | + if ((avctx->rc_buffer_size) && |
| 298 | + (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) { |
| 299 | + x4->params.rc.f_vbv_buffer_init = |
| 300 | + (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size; |
| 301 | + } else |
| 302 | + x4->params.rc.f_vbv_buffer_init = 0.9; |
| 303 | + |
| 304 | + /* TAG:do we have MB tree RC method */ |
| 305 | + /* what is the RC method we are now using? Default NO */ |
| 306 | + x4->params.rc.b_mb_tree = !!(avctx->flags2 & CODEC_FLAG2_MBTREE); |
| 307 | + x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor); |
| 308 | + x4->params.rc.f_pb_factor = avctx->b_quant_factor; |
| 309 | + x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset; |
| 310 | + |
| 311 | + x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR; |
| 312 | + x4->params.i_log_level = XAVS_LOG_DEBUG; |
| 313 | + x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD; |
| 314 | + x4->params.i_threads = avctx->thread_count; |
| 315 | + x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT; |
| 316 | + |
| 317 | + if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) |
| 318 | + x4->params.b_repeat_headers = 0; |
| 319 | + |
| 320 | + x4->enc = xavs_encoder_open(&x4->params); |
| 321 | + if (!x4->enc) |
| 322 | + return -1; |
| 323 | + |
| 324 | + avctx->coded_frame = &x4->out_pic; |
| 325 | + /* TAG: Do we have GLOBAL HEADER in AVS */ |
| 326 | + /* We Have PPS and SPS in AVS */ |
| 327 | + if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { |
| 328 | + xavs_nal_t *nal; |
| 329 | + int nnal, s; |
| 330 | + |
| 331 | + s = xavs_encoder_headers(x4->enc, &nal, &nnal); |
| 332 | + |
| 333 | + avctx->extradata = av_malloc(s); |
| 334 | + avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1); |
| 335 | + } |
| 336 | + return 0; |
| 337 | +} |
| 338 | + |
| 339 | +AVCodec libxavs_encoder = { |
| 340 | + .name = "libxavs", |
| 341 | + .type = CODEC_TYPE_VIDEO, |
| 342 | + .id = CODEC_ID_CAVS, |
| 343 | + .priv_data_size = sizeof(XavsContext), |
| 344 | + .init = XAVS_init, |
| 345 | + .encode = XAVS_frame, |
| 346 | + .close = XAVS_close, |
| 347 | + .capabilities = CODEC_CAP_DELAY, |
| 348 | + .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV420P, PIX_FMT_NONE }, |
| 349 | + .long_name = NULL_IF_CONFIG_SMALL("libxavs - the Chinese Audio Video Standard Encoder"), |
| 350 | +}; |
| 351 | + |