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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 typedef struct X264Context {
32 X264_log(void *p, int level, const char *fmt, va_list args)
34 static const int level_map[] = {
35 [X264_LOG_ERROR] = AV_LOG_ERROR,
36 [X264_LOG_WARNING] = AV_LOG_ERROR,
37 [X264_LOG_INFO] = AV_LOG_INFO,
38 [X264_LOG_DEBUG] = AV_LOG_DEBUG
41 if(level < 0 || level > X264_LOG_DEBUG)
44 av_vlog(p, level_map[level], fmt, args);
49 encode_nals(uint8_t *buf, int size, x264_nal_t *nals, int nnal)
54 for(i = 0; i < nnal; i++){
55 int s = x264_nal_encode(p, &size, 1, nals + i);
65 X264_frame(AVCodecContext *ctx, uint8_t *buf, int bufsize, void *data)
67 X264Context *x4 = ctx->priv_data;
68 AVFrame *frame = data;
71 x264_picture_t pic_out;
73 x4->pic.img.i_csp = X264_CSP_I420;
74 x4->pic.img.i_plane = 3;
76 for(i = 0; i < 3; i++){
77 x4->pic.img.plane[i] = frame->data[i];
78 x4->pic.img.i_stride[i] = frame->linesize[i];
81 x4->pic.i_pts = frame->pts;
82 x4->pic.i_type = X264_TYPE_AUTO;
84 if(x264_encoder_encode(x4->enc, &nal, &nnal, &x4->pic, &pic_out))
87 bufsize = encode_nals(buf, bufsize, nal, nnal);
92 x4->out_pic.pts = pic_out.i_pts;
94 switch(pic_out.i_type){
97 x4->out_pic.pict_type = FF_I_TYPE;
100 x4->out_pic.pict_type = FF_P_TYPE;
104 x4->out_pic.pict_type = FF_B_TYPE;
108 x4->out_pic.key_frame = pic_out.i_type == X264_TYPE_IDR;
109 x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
115 X264_close(AVCodecContext *avctx)
117 X264Context *x4 = avctx->priv_data;
120 x264_encoder_close(x4->enc);
126 X264_init(AVCodecContext *avctx)
128 X264Context *x4 = avctx->priv_data;
130 x264_param_default(&x4->params);
132 x4->params.pf_log = X264_log;
133 x4->params.p_log_private = avctx;
135 x4->params.i_keyint_max = avctx->gop_size;
136 x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
137 x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
138 x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000;
139 if(avctx->rc_buffer_size)
140 x4->params.rc.b_cbr = 1;
141 x4->params.i_bframe = avctx->max_b_frames;
142 x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
144 x4->params.rc.i_qp_min = avctx->qmin;
145 x4->params.rc.i_qp_max = avctx->qmax;
146 x4->params.rc.i_qp_step = avctx->max_qdiff;
148 x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
149 x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */
151 if(avctx->flags & CODEC_FLAG_QSCALE && avctx->global_quality > 0)
152 x4->params.rc.i_qp_constant =
153 12 + 6 * log2((double) avctx->global_quality / FF_QP2LAMBDA);
155 x4->params.i_width = avctx->width;
156 x4->params.i_height = avctx->height;
157 x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
158 x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
159 x4->params.i_fps_num = avctx->time_base.den;
160 x4->params.i_fps_den = avctx->time_base.num;
162 x4->params.i_threads = avctx->thread_count;
164 x4->enc = x264_encoder_open(&x4->params);
168 avctx->coded_frame = &x4->out_pic;
173 AVCodec x264_encoder = {
175 .type = CODEC_TYPE_VIDEO,
177 .priv_data_size = sizeof(X264Context),
179 .encode = X264_frame,
181 .pix_fmts = (enum PixelFormat[]) { PIX_FMT_YUV420P, -1 }