2 * H.264 encoding using the x264 library
3 * Copyright (C) 2005 Mans Rullgard <mru@inprovide.com>
5 * This file is part of FFmpeg.
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.
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.
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
29 typedef struct X264Context {
37 X264_log(void *p, int level, const char *fmt, va_list args)
39 static const int level_map[] = {
40 [X264_LOG_ERROR] = AV_LOG_ERROR,
41 [X264_LOG_WARNING] = AV_LOG_ERROR,
42 [X264_LOG_INFO] = AV_LOG_INFO,
43 [X264_LOG_DEBUG] = AV_LOG_DEBUG
46 if(level < 0 || level > X264_LOG_DEBUG)
49 av_vlog(p, level_map[level], fmt, args);
54 encode_nals(uint8_t *buf, int size, x264_nal_t *nals, int nnal)
59 for(i = 0; i < nnal; i++){
60 int s = x264_nal_encode(p, &size, 1, nals + i);
70 X264_frame(AVCodecContext *ctx, uint8_t *buf, int bufsize, void *data)
72 X264Context *x4 = ctx->priv_data;
73 AVFrame *frame = data;
76 x264_picture_t pic_out;
78 x4->pic.img.i_csp = X264_CSP_I420;
79 x4->pic.img.i_plane = 3;
81 for(i = 0; i < 3; i++){
82 x4->pic.img.plane[i] = frame->data[i];
83 x4->pic.img.i_stride[i] = frame->linesize[i];
86 x4->pic.i_pts = frame->pts;
87 x4->pic.i_type = X264_TYPE_AUTO;
89 if(x264_encoder_encode(x4->enc, &nal, &nnal, &x4->pic, &pic_out))
92 bufsize = encode_nals(buf, bufsize, nal, nnal);
97 x4->out_pic.pts = pic_out.i_pts;
99 switch(pic_out.i_type){
102 x4->out_pic.pict_type = FF_I_TYPE;
105 x4->out_pic.pict_type = FF_P_TYPE;
109 x4->out_pic.pict_type = FF_B_TYPE;
113 x4->out_pic.key_frame = pic_out.i_type == X264_TYPE_IDR;
114 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
120 X264_close(AVCodecContext *avctx)
122 X264Context *x4 = avctx->priv_data;
125 x264_encoder_close(x4->enc);
131 X264_init(AVCodecContext *avctx)
133 X264Context *x4 = avctx->priv_data;
135 x264_param_default(&x4->params);
137 x4->params.pf_log = X264_log;
138 x4->params.p_log_private = avctx;
140 x4->params.i_keyint_max = avctx->gop_size;
141 x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
142 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
143 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
144 x4->params.rc.b_stat_write = (avctx->flags & CODEC_FLAG_PASS1);
145 if(avctx->flags & CODEC_FLAG_PASS2) x4->params.rc.b_stat_read = 1;
148 x4->params.rc.i_rc_method = X264_RC_CRF;
149 x4->params.rc.i_rf_constant = avctx->crf;
150 }else if(avctx->cqp > -1){
151 x4->params.rc.i_rc_method = X264_RC_CQP;
152 x4->params.rc.i_qp_constant = avctx->cqp;
156 // if neither crf nor cqp modes are selected we have to enable the RC
157 // we do it this way because we cannot check if the bitrate has been set
158 if(!(avctx->crf || (avctx->cqp > -1))) x4->params.rc.i_rc_method = X264_RC_ABR;
160 x4->params.i_bframe = avctx->max_b_frames;
161 x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
162 x4->params.b_bframe_adaptive = avctx->b_frame_strategy;
163 x4->params.i_bframe_bias = avctx->bframebias;
164 x4->params.b_bframe_pyramid = (avctx->flags2 & CODEC_FLAG2_BPYRAMID);
165 avctx->has_b_frames= (avctx->flags2 & CODEC_FLAG2_BPYRAMID) ? 2 : !!avctx->max_b_frames;
167 x4->params.i_keyint_min = avctx->keyint_min;
168 if(x4->params.i_keyint_min > x4->params.i_keyint_max)
169 x4->params.i_keyint_min = x4->params.i_keyint_max;
171 x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
173 x4->params.b_deblocking_filter = (avctx->flags & CODEC_FLAG_LOOP_FILTER);
174 x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
175 x4->params.i_deblocking_filter_beta = avctx->deblockbeta;
177 x4->params.rc.i_qp_min = avctx->qmin;
178 x4->params.rc.i_qp_max = avctx->qmax;
179 x4->params.rc.i_qp_step = avctx->max_qdiff;
181 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
182 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
183 x4->params.rc.f_complexity_blur = avctx->complexityblur;
185 x4->params.i_frame_reference = avctx->refs;
187 x4->params.i_width = avctx->width;
188 x4->params.i_height = avctx->height;
189 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
190 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
191 x4->params.i_fps_num = avctx->time_base.den;
192 x4->params.i_fps_den = avctx->time_base.num;
194 x4->params.analyse.inter = 0;
195 if(avctx->partitions){
196 if(avctx->partitions & X264_PART_I4X4)
197 x4->params.analyse.inter |= X264_ANALYSE_I4x4;
198 if(avctx->partitions & X264_PART_I8X8)
199 x4->params.analyse.inter |= X264_ANALYSE_I8x8;
200 if(avctx->partitions & X264_PART_P8X8)
201 x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16;
202 if(avctx->partitions & X264_PART_P4X4)
203 x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8;
204 if(avctx->partitions & X264_PART_B8X8)
205 x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16;
208 x4->params.analyse.i_direct_mv_pred = avctx->directpred;
210 x4->params.analyse.b_weighted_bipred = (avctx->flags2 & CODEC_FLAG2_WPRED);
212 if(avctx->me_method == ME_EPZS)
213 x4->params.analyse.i_me_method = X264_ME_DIA;
214 else if(avctx->me_method == ME_HEX)
215 x4->params.analyse.i_me_method = X264_ME_HEX;
216 else if(avctx->me_method == ME_UMH)
217 x4->params.analyse.i_me_method = X264_ME_UMH;
218 else if(avctx->me_method == ME_FULL)
219 x4->params.analyse.i_me_method = X264_ME_ESA;
220 else x4->params.analyse.i_me_method = X264_ME_HEX;
222 x4->params.analyse.i_me_range = avctx->me_range;
223 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;
225 x4->params.analyse.b_bframe_rdo = (avctx->flags2 & CODEC_FLAG2_BRDO);
226 x4->params.analyse.b_mixed_references =
227 (avctx->flags2 & CODEC_FLAG2_MIXED_REFS);
228 x4->params.analyse.b_chroma_me = (avctx->me_cmp & FF_CMP_CHROMA);
229 x4->params.analyse.b_transform_8x8 = (avctx->flags2 & CODEC_FLAG2_8X8DCT);
230 x4->params.analyse.b_fast_pskip = (avctx->flags2 & CODEC_FLAG2_FASTPSKIP);
232 x4->params.analyse.i_trellis = avctx->trellis;
233 x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
235 if(avctx->level > 0) x4->params.i_level_idc = avctx->level;
237 x4->params.rc.f_rate_tolerance =
238 (float)avctx->bit_rate_tolerance/avctx->bit_rate;
240 if((avctx->rc_buffer_size != 0) &&
241 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)){
242 x4->params.rc.f_vbv_buffer_init =
243 (float)avctx->rc_initial_buffer_occupancy/avctx->rc_buffer_size;
245 else x4->params.rc.f_vbv_buffer_init = 0.9;
247 x4->params.rc.f_ip_factor = 1/fabs(avctx->i_quant_factor);
248 x4->params.rc.f_pb_factor = avctx->b_quant_factor;
249 x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
250 x4->params.rc.psz_rc_eq = avctx->rc_eq;
252 x4->params.analyse.b_psnr = (avctx->flags & CODEC_FLAG_PSNR);
253 x4->params.i_log_level = X264_LOG_DEBUG;
255 x4->params.b_aud = (avctx->flags2 & CODEC_FLAG2_AUD);
257 x4->params.i_threads = avctx->thread_count;
259 if(avctx->flags & CODEC_FLAG_GLOBAL_HEADER){
260 x4->params.b_repeat_headers = 0;
263 x4->enc = x264_encoder_open(&x4->params);
267 avctx->coded_frame = &x4->out_pic;
269 if(avctx->flags & CODEC_FLAG_GLOBAL_HEADER){
273 x264_encoder_headers(x4->enc, &nal, &nnal);
275 /* 5 bytes NAL header + worst case escaping */
276 for(i = 0; i < nnal; i++)
277 s += 5 + nal[i].i_payload * 4 / 3;
279 avctx->extradata = av_malloc(s);
280 avctx->extradata_size = encode_nals(avctx->extradata, s, nal, nnal);
286 AVCodec x264_encoder = {
288 .type = CODEC_TYPE_VIDEO,
290 .priv_data_size = sizeof(X264Context),
292 .encode = X264_frame,
294 .pix_fmts = (enum PixelFormat[]) { PIX_FMT_YUV420P, -1 }