2 * H.264 encoding using the x264 library
3 * Copyright (C) 2005 Mans Rullgard <mru@inprovide.com>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 typedef struct X264Context {
35 X264_log(void *p, int level, const char *fmt, va_list args)
37 static const int level_map[] = {
38 [X264_LOG_ERROR] = AV_LOG_ERROR,
39 [X264_LOG_WARNING] = AV_LOG_ERROR,
40 [X264_LOG_INFO] = AV_LOG_INFO,
41 [X264_LOG_DEBUG] = AV_LOG_DEBUG
44 if(level < 0 || level > X264_LOG_DEBUG)
47 av_vlog(p, level_map[level], fmt, args);
52 encode_nals(uint8_t *buf, int size, x264_nal_t *nals, int nnal)
57 for(i = 0; i < nnal; i++){
58 int s = x264_nal_encode(p, &size, 1, nals + i);
68 X264_frame(AVCodecContext *ctx, uint8_t *buf, int bufsize, void *data)
70 X264Context *x4 = ctx->priv_data;
71 AVFrame *frame = data;
74 x264_picture_t pic_out;
76 x4->pic.img.i_csp = X264_CSP_I420;
77 x4->pic.img.i_plane = 3;
79 for(i = 0; i < 3; i++){
80 x4->pic.img.plane[i] = frame->data[i];
81 x4->pic.img.i_stride[i] = frame->linesize[i];
84 x4->pic.i_pts = frame->pts;
85 x4->pic.i_type = X264_TYPE_AUTO;
87 if(x264_encoder_encode(x4->enc, &nal, &nnal, &x4->pic, &pic_out))
90 bufsize = encode_nals(buf, bufsize, nal, nnal);
95 x4->out_pic.pts = pic_out.i_pts;
97 switch(pic_out.i_type){
100 x4->out_pic.pict_type = FF_I_TYPE;
103 x4->out_pic.pict_type = FF_P_TYPE;
107 x4->out_pic.pict_type = FF_B_TYPE;
111 x4->out_pic.key_frame = pic_out.i_type == X264_TYPE_IDR;
112 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
118 X264_close(AVCodecContext *avctx)
120 X264Context *x4 = avctx->priv_data;
123 x264_encoder_close(x4->enc);
129 X264_init(AVCodecContext *avctx)
131 X264Context *x4 = avctx->priv_data;
133 x264_param_default(&x4->params);
135 x4->params.pf_log = X264_log;
136 x4->params.p_log_private = avctx;
138 x4->params.i_keyint_max = avctx->gop_size;
139 x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
140 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
141 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
142 x4->params.rc.b_stat_write = (avctx->flags & CODEC_FLAG_PASS1);
143 if(avctx->flags & CODEC_FLAG_PASS2) x4->params.rc.b_stat_read = 1;
145 if(avctx->crf) x4->params.rc.i_rf_constant = avctx->crf;
146 else if(avctx->cqp > -1) x4->params.rc.i_qp_constant = avctx->cqp;
149 // if neither crf nor cqp modes are selected we have to enable the RC
150 // we do it this way because we cannot check if the bitrate has been set
151 if(!(avctx->crf || (avctx->cqp > -1))) x4->params.rc.b_cbr = 1;
153 x4->params.i_bframe = avctx->max_b_frames;
154 x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
155 x4->params.b_bframe_adaptive = avctx->b_frame_strategy;
156 x4->params.i_bframe_bias = avctx->bframebias;
157 x4->params.b_bframe_pyramid = (avctx->flags2 & CODEC_FLAG2_BPYRAMID);
159 x4->params.i_keyint_min = avctx->keyint_min;
160 if(x4->params.i_keyint_min > x4->params.i_keyint_max)
161 x4->params.i_keyint_min = x4->params.i_keyint_max;
163 x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
165 x4->params.b_deblocking_filter = (avctx->flags & CODEC_FLAG_LOOP_FILTER);
166 x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
167 x4->params.i_deblocking_filter_beta = avctx->deblockbeta;
169 x4->params.rc.i_qp_min = avctx->qmin;
170 x4->params.rc.i_qp_max = avctx->qmax;
171 x4->params.rc.i_qp_step = avctx->max_qdiff;
173 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
174 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
175 x4->params.rc.f_complexity_blur = avctx->complexityblur;
177 x4->params.i_frame_reference = avctx->refs;
179 x4->params.i_width = avctx->width;
180 x4->params.i_height = avctx->height;
181 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
182 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
183 x4->params.i_fps_num = avctx->time_base.den;
184 x4->params.i_fps_den = avctx->time_base.num;
186 x4->params.analyse.inter = 0;
187 if(avctx->partitions){
188 if(avctx->partitions & X264_PART_I4X4)
189 x4->params.analyse.inter |= X264_ANALYSE_I4x4;
190 if(avctx->partitions & X264_PART_I8X8)
191 x4->params.analyse.inter |= X264_ANALYSE_I8x8;
192 if(avctx->partitions & X264_PART_P8X8)
193 x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16;
194 if(avctx->partitions & X264_PART_P4X4)
195 x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8;
196 if(avctx->partitions & X264_PART_B8X8)
197 x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16;
200 x4->params.analyse.i_direct_mv_pred = avctx->directpred;
202 x4->params.analyse.b_weighted_bipred = (avctx->flags2 & CODEC_FLAG2_WPRED);
204 if(avctx->me_method == ME_EPZS)
205 x4->params.analyse.i_me_method = X264_ME_DIA;
206 else if(avctx->me_method == ME_HEX)
207 x4->params.analyse.i_me_method = X264_ME_HEX;
208 else if(avctx->me_method == ME_UMH)
209 x4->params.analyse.i_me_method = X264_ME_UMH;
210 else if(avctx->me_method == ME_FULL)
211 x4->params.analyse.i_me_method = X264_ME_ESA;
212 else x4->params.analyse.i_me_method = X264_ME_HEX;
214 x4->params.analyse.i_me_range = avctx->me_range;
215 x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality;
217 x4->params.analyse.b_bframe_rdo = (avctx->flags2 & CODEC_FLAG2_BRDO);
218 x4->params.analyse.b_mixed_references =
219 (avctx->flags2 & CODEC_FLAG2_MIXED_REFS);
220 x4->params.analyse.b_chroma_me = (avctx->me_cmp & FF_CMP_CHROMA);
221 x4->params.analyse.b_transform_8x8 = (avctx->flags2 & CODEC_FLAG2_8X8DCT);
222 x4->params.analyse.b_fast_pskip = (avctx->flags2 & CODEC_FLAG2_FASTPSKIP);
224 x4->params.analyse.i_trellis = avctx->trellis;
226 if(avctx->level > 0) x4->params.i_level_idc = avctx->level;
228 x4->params.rc.f_rate_tolerance =
229 (float)avctx->bit_rate_tolerance/avctx->bit_rate;
231 if((avctx->rc_buffer_size != 0) &&
232 (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)){
233 x4->params.rc.f_vbv_buffer_init =
234 (float)avctx->rc_initial_buffer_occupancy/avctx->rc_buffer_size;
236 else x4->params.rc.f_vbv_buffer_init = 0.9;
238 x4->params.rc.f_ip_factor = 1/fabs(avctx->i_quant_factor);
239 x4->params.rc.f_pb_factor = avctx->b_quant_factor;
240 x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
241 x4->params.rc.psz_rc_eq = avctx->rc_eq;
243 x4->params.analyse.b_psnr = (avctx->flags & CODEC_FLAG_PSNR);
244 x4->params.i_log_level = X264_LOG_DEBUG;
246 x4->params.b_aud = (avctx->flags2 & CODEC_FLAG2_AUD);
248 x4->params.i_threads = avctx->thread_count;
250 if(avctx->flags & CODEC_FLAG_GLOBAL_HEADER){
251 x4->params.b_repeat_headers = 0;
254 x4->enc = x264_encoder_open(&x4->params);
258 avctx->coded_frame = &x4->out_pic;
260 if(avctx->flags & CODEC_FLAG_GLOBAL_HEADER){
264 x264_encoder_headers(x4->enc, &nal, &nnal);
266 /* 5 bytes NAL header + worst case escaping */
267 for(i = 0; i < nnal; i++)
268 s += 5 + nal[i].i_payload * 4 / 3;
270 avctx->extradata = av_malloc(s);
271 avctx->extradata_size = encode_nals(avctx->extradata, s, nal, nnal);
277 AVCodec x264_encoder = {
279 .type = CODEC_TYPE_VIDEO,
281 .priv_data_size = sizeof(X264Context),
283 .encode = X264_frame,
285 .pix_fmts = (enum PixelFormat[]) { PIX_FMT_YUV420P, -1 }