x264.c
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:5k
源码类别:
Windows CE
开发平台:
C/C++
- /*
- * 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 }
- };