1/* 2 * H.264 encoding using the x264 library 3 * Copyright (C) 2005 Mans Rullgard <mans@mansr.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 "avcodec.h" 23#include <x264.h> 24#include <math.h> 25#include <stdio.h> 26#include <stdlib.h> 27#include <string.h> 28 29typedef struct X264Context { 30 x264_param_t params; 31 x264_t *enc; 32 x264_picture_t pic; 33 uint8_t *sei; 34 int sei_size; 35 AVFrame out_pic; 36} X264Context; 37 38static void X264_log(void *p, int level, const char *fmt, va_list args) 39{ 40 static const int level_map[] = { 41 [X264_LOG_ERROR] = AV_LOG_ERROR, 42 [X264_LOG_WARNING] = AV_LOG_WARNING, 43 [X264_LOG_INFO] = AV_LOG_INFO, 44 [X264_LOG_DEBUG] = AV_LOG_DEBUG 45 }; 46 47 if (level < 0 || level > X264_LOG_DEBUG) 48 return; 49 50 av_vlog(p, level_map[level], fmt, args); 51} 52 53 54static int encode_nals(AVCodecContext *ctx, uint8_t *buf, int size, 55 x264_nal_t *nals, int nnal, int skip_sei) 56{ 57 X264Context *x4 = ctx->priv_data; 58 uint8_t *p = buf; 59 int i; 60 61 /* Write the SEI as part of the first frame. */ 62 if (x4->sei_size > 0 && nnal > 0) { 63 memcpy(p, x4->sei, x4->sei_size); 64 p += x4->sei_size; 65 x4->sei_size = 0; 66 } 67 68 for (i = 0; i < nnal; i++){ 69 /* Don't put the SEI in extradata. */ 70 if (skip_sei && nals[i].i_type == NAL_SEI) { 71 x4->sei_size = nals[i].i_payload; 72 x4->sei = av_malloc(x4->sei_size); 73 memcpy(x4->sei, nals[i].p_payload, nals[i].i_payload); 74 continue; 75 } 76 memcpy(p, nals[i].p_payload, nals[i].i_payload); 77 p += nals[i].i_payload; 78 } 79 80 return p - buf; 81} 82 83static int X264_frame(AVCodecContext *ctx, uint8_t *buf, 84 int bufsize, void *data) 85{ 86 X264Context *x4 = ctx->priv_data; 87 AVFrame *frame = data; 88 x264_nal_t *nal; 89 int nnal, i; 90 x264_picture_t pic_out; 91 92 x4->pic.img.i_csp = X264_CSP_I420; 93 x4->pic.img.i_plane = 3; 94 95 if (frame) { 96 for (i = 0; i < 3; i++) { 97 x4->pic.img.plane[i] = frame->data[i]; 98 x4->pic.img.i_stride[i] = frame->linesize[i]; 99 } 100 101 x4->pic.i_pts = frame->pts; 102 x4->pic.i_type = X264_TYPE_AUTO; 103 } 104 105 if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0) 106 return -1; 107 108 bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0); 109 if (bufsize < 0) 110 return -1; 111 112 /* FIXME: libx264 now provides DTS, but AVFrame doesn't have a field for it. */ 113 x4->out_pic.pts = pic_out.i_pts; 114 115 switch (pic_out.i_type) { 116 case X264_TYPE_IDR: 117 case X264_TYPE_I: 118 x4->out_pic.pict_type = FF_I_TYPE; 119 break; 120 case X264_TYPE_P: 121 x4->out_pic.pict_type = FF_P_TYPE; 122 break; 123 case X264_TYPE_B: 124 case X264_TYPE_BREF: 125 x4->out_pic.pict_type = FF_B_TYPE; 126 break; 127 } 128 129 x4->out_pic.key_frame = pic_out.b_keyframe; 130 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA; 131 132 return bufsize; 133} 134 135static av_cold int X264_close(AVCodecContext *avctx) 136{ 137 X264Context *x4 = avctx->priv_data; 138 139 av_freep(&avctx->extradata); 140 av_free(x4->sei); 141 142 if (x4->enc) 143 x264_encoder_close(x4->enc); 144 145 return 0; 146} 147 148static av_cold int X264_init(AVCodecContext *avctx) 149{ 150 X264Context *x4 = avctx->priv_data; 151 152 x4->sei_size = 0; 153 x264_param_default(&x4->params); 154 155 x4->params.pf_log = X264_log; 156 x4->params.p_log_private = avctx; 157 158 x4->params.i_keyint_max = avctx->gop_size; 159 x4->params.rc.i_bitrate = avctx->bit_rate / 1000; 160 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000; 161 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000; 162 x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1; 163 if (avctx->flags & CODEC_FLAG_PASS2) { 164 x4->params.rc.b_stat_read = 1; 165 } else { 166 if (avctx->crf) { 167 x4->params.rc.i_rc_method = X264_RC_CRF; 168 x4->params.rc.f_rf_constant = avctx->crf; 169 } else if (avctx->cqp > -1) { 170 x4->params.rc.i_rc_method = X264_RC_CQP; 171 x4->params.rc.i_qp_constant = avctx->cqp; 172 } 173 } 174 175 // if neither crf nor cqp modes are selected we have to enable the RC 176 // we do it this way because we cannot check if the bitrate has been set 177 if (!(avctx->crf || (avctx->cqp > -1))) 178 x4->params.rc.i_rc_method = X264_RC_ABR; 179 180 x4->params.i_bframe = avctx->max_b_frames; 181 x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC; 182 x4->params.i_bframe_adaptive = avctx->b_frame_strategy; 183 x4->params.i_bframe_bias = avctx->bframebias; 184 x4->params.i_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE; 185 avctx->has_b_frames = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? 2 : !!avctx->max_b_frames; 186 187 x4->params.i_keyint_min = avctx->keyint_min; 188 if (x4->params.i_keyint_min > x4->params.i_keyint_max) 189 x4->params.i_keyint_min = x4->params.i_keyint_max; 190 191 x4->params.i_scenecut_threshold = avctx->scenechange_threshold; 192 193 x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER; 194 x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha; 195 x4->params.i_deblocking_filter_beta = avctx->deblockbeta; 196 197 x4->params.rc.i_qp_min = avctx->qmin; 198 x4->params.rc.i_qp_max = avctx->qmax; 199 x4->params.rc.i_qp_step = avctx->max_qdiff; 200 201 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */ 202 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */ 203 x4->params.rc.f_complexity_blur = avctx->complexityblur; 204 205 x4->params.i_frame_reference = avctx->refs; 206 207 x4->params.i_width = avctx->width; 208 x4->params.i_height = avctx->height; 209 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num; 210 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den; 211 x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den; 212 x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num; 213 214 x4->params.analyse.inter = 0; 215 if (avctx->partitions) { 216 if (avctx->partitions & X264_PART_I4X4) 217 x4->params.analyse.inter |= X264_ANALYSE_I4x4; 218 if (avctx->partitions & X264_PART_I8X8) 219 x4->params.analyse.inter |= X264_ANALYSE_I8x8; 220 if (avctx->partitions & X264_PART_P8X8) 221 x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16; 222 if (avctx->partitions & X264_PART_P4X4) 223 x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8; 224 if (avctx->partitions & X264_PART_B8X8) 225 x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16; 226 } 227 228 x4->params.analyse.i_direct_mv_pred = avctx->directpred; 229 230 x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED; 231 x4->params.analyse.i_weighted_pred = avctx->weighted_p_pred; 232 233 if (avctx->me_method == ME_EPZS) 234 x4->params.analyse.i_me_method = X264_ME_DIA; 235 else if (avctx->me_method == ME_HEX) 236 x4->params.analyse.i_me_method = X264_ME_HEX; 237 else if (avctx->me_method == ME_UMH) 238 x4->params.analyse.i_me_method = X264_ME_UMH; 239 else if (avctx->me_method == ME_FULL) 240 x4->params.analyse.i_me_method = X264_ME_ESA; 241 else if (avctx->me_method == ME_TESA) 242 x4->params.analyse.i_me_method = X264_ME_TESA; 243 else x4->params.analyse.i_me_method = X264_ME_HEX; 244 245 x4->params.rc.i_aq_mode = avctx->aq_mode; 246 x4->params.rc.f_aq_strength = avctx->aq_strength; 247 x4->params.rc.i_lookahead = avctx->rc_lookahead; 248 249 x4->params.analyse.b_psy = avctx->flags2 & CODEC_FLAG2_PSY; 250 x4->params.analyse.f_psy_rd = avctx->psy_rd; 251 x4->params.analyse.f_psy_trellis = avctx->psy_trellis; 252 253 x4->params.analyse.i_me_range = avctx->me_range; 254 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality; 255 256 x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS; 257 x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA; 258 x4->params.analyse.b_transform_8x8 = avctx->flags2 & CODEC_FLAG2_8X8DCT; 259 x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP; 260 261 x4->params.analyse.i_trellis = avctx->trellis; 262 x4->params.analyse.i_noise_reduction = avctx->noise_reduction; 263 264 if (avctx->level > 0) 265 x4->params.i_level_idc = avctx->level; 266 267 x4->params.rc.f_rate_tolerance = 268 (float)avctx->bit_rate_tolerance/avctx->bit_rate; 269 270 if ((avctx->rc_buffer_size != 0) && 271 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) { 272 x4->params.rc.f_vbv_buffer_init = 273 (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size; 274 } else 275 x4->params.rc.f_vbv_buffer_init = 0.9; 276 277 x4->params.rc.b_mb_tree = !!(avctx->flags2 & CODEC_FLAG2_MBTREE); 278 x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor); 279 x4->params.rc.f_pb_factor = avctx->b_quant_factor; 280 x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset; 281 282 x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR; 283 x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM; 284 x4->params.i_log_level = X264_LOG_DEBUG; 285 286 x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD; 287 288 x4->params.i_threads = avctx->thread_count; 289 290 x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT; 291 292 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) 293 x4->params.b_repeat_headers = 0; 294 295 x4->enc = x264_encoder_open(&x4->params); 296 if (!x4->enc) 297 return -1; 298 299 avctx->coded_frame = &x4->out_pic; 300 301 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { 302 x264_nal_t *nal; 303 int nnal, s, i; 304 305 s = x264_encoder_headers(x4->enc, &nal, &nnal); 306 307 for (i = 0; i < nnal; i++) 308 if (nal[i].i_type == NAL_SEI) 309 av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25); 310 311 avctx->extradata = av_malloc(s); 312 avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1); 313 } 314 315 return 0; 316} 317 318AVCodec libx264_encoder = { 319 .name = "libx264", 320 .type = AVMEDIA_TYPE_VIDEO, 321 .id = CODEC_ID_H264, 322 .priv_data_size = sizeof(X264Context), 323 .init = X264_init, 324 .encode = X264_frame, 325 .close = X264_close, 326 .capabilities = CODEC_CAP_DELAY, 327 .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV420P, PIX_FMT_NONE }, 328 .long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"), 329}; 330