/* * H.264 encoding using the x264 library * Copyright (C) 2005 Mans Rullgard <mru@inprovide.com> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "avcodec.h" #include <x264.h> #include <math.h> typedef struct X264Context { x264_param_t params; x264_t *enc; x264_picture_t pic; AVFrame out_pic; } X264Context; static void X264_log(void *p, int level, const char *fmt, va_list args) { static const int level_map[] = { [X264_LOG_ERROR] = AV_LOG_ERROR, [X264_LOG_WARNING] = AV_LOG_ERROR, [X264_LOG_INFO] = AV_LOG_INFO, [X264_LOG_DEBUG] = AV_LOG_DEBUG }; if(level < 0 || level > X264_LOG_DEBUG) return; av_vlog(p, level_map[level], fmt, args); } static int encode_nals(uint8_t *buf, int size, x264_nal_t *nals, int nnal) { uint8_t *p = buf; int i; for(i = 0; i < nnal; i++){ int s = x264_nal_encode(p, &size, 1, nals + i); if(s < 0) return -1; p += s; } return p - buf; } extern int X264_frame(AVCodecContext *ctx, uint8_t *buf, int bufsize, void *data) { X264Context *x4 = ctx->priv_data; AVFrame *frame = data; x264_nal_t *nal; int nnal, i; x264_picture_t pic_out; x4->pic.img.i_csp = X264_CSP_I420; x4->pic.img.i_plane = 3; for(i = 0; i < 3; i++){ x4->pic.img.plane[i] = frame->data[i]; x4->pic.img.i_stride[i] = frame->linesize[i]; } x4->pic.i_pts = frame->pts; x4->pic.i_type = X264_TYPE_AUTO; if(x264_encoder_encode(x4->enc, &nal, &nnal, &x4->pic, &pic_out)) return -1; bufsize = encode_nals(buf, bufsize, nal, nnal); if(bufsize < 0) return -1; /* FIXME: dts */ x4->out_pic.pts = pic_out.i_pts; switch(pic_out.i_type){ case X264_TYPE_IDR: case X264_TYPE_I: x4->out_pic.pict_type = FF_I_TYPE; break; case X264_TYPE_P: x4->out_pic.pict_type = FF_P_TYPE; break; case X264_TYPE_B: case X264_TYPE_BREF: x4->out_pic.pict_type = FF_B_TYPE; break; } x4->out_pic.key_frame = pic_out.i_type == X264_TYPE_IDR; x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA; return bufsize; } static int X264_close(AVCodecContext *avctx) { X264Context *x4 = avctx->priv_data; if(x4->enc) x264_encoder_close(x4->enc); return 0; } extern int X264_init(AVCodecContext *avctx) { X264Context *x4 = avctx->priv_data; x264_param_default(&x4->params); x4->params.pf_log = X264_log; x4->params.p_log_private = avctx; x4->params.i_keyint_max = avctx->gop_size; x4->params.rc.i_bitrate = avctx->bit_rate / 1000; x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000; x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000; if(avctx->rc_buffer_size) x4->params.rc.b_cbr = 1; x4->params.i_bframe = avctx->max_b_frames; x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC; x4->params.rc.i_qp_min = avctx->qmin; x4->params.rc.i_qp_max = avctx->qmax; x4->params.rc.i_qp_step = avctx->max_qdiff; x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */ x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */ if(avctx->flags & CODEC_FLAG_QSCALE && avctx->global_quality > 0) x4->params.rc.i_qp_constant = 12 + 6 * log2((double) avctx->global_quality / FF_QP2LAMBDA); x4->params.i_width = avctx->width; x4->params.i_height = avctx->height; x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num; x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den; x4->params.i_fps_num = avctx->time_base.den; x4->params.i_fps_den = avctx->time_base.num; x4->params.i_threads = avctx->thread_count; x4->enc = x264_encoder_open(&x4->params); if(!x4->enc) return -1; avctx->coded_frame = &x4->out_pic; return 0; } AVCodec x264_encoder = { .name = "h264", .type = CODEC_TYPE_VIDEO, .id = CODEC_ID_H264, .priv_data_size = sizeof(X264Context), .init = X264_init, .encode = X264_frame, .close = X264_close, .pix_fmts = (enum PixelFormat[]) { PIX_FMT_YUV420P, -1 } };