libavcodec/x264.c

   1 /*
   2  * H.264 encoding using the x264 library
   3  * Copyright (C) 2005  Måns Rullgård <mru@inprovide.com>
   4  *
   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.
   9  *
  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.
  14  *
  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
  18  */
  19
  20 #include "avcodec.h"
  21 #include <x264.h>
  22
  23 typedef struct X264Context {
  24     x264_param_t params;
  25     x264_t *enc;
  26     x264_picture_t pic;
  27     AVFrame out_pic;
  28 } X264Context;
  29
  30 static void
  31 X264_log(void *p, int level, const char *fmt, va_list args)
  32 {
  33     static const int level_map[] = {
  34         [X264_LOG_ERROR]   = AV_LOG_ERROR,
  35         [X264_LOG_WARNING] = AV_LOG_ERROR,
  36         [X264_LOG_INFO]    = AV_LOG_INFO,
  37         [X264_LOG_DEBUG]   = AV_LOG_DEBUG
  38     };
  39
  40     if(level < 0 || level > X264_LOG_DEBUG)
  41         return;
  42
  43     av_vlog(p, level_map[level], fmt, args);
  44 }
  45
  46
  47 static int
  48 encode_nals(u_char *buf, int size, x264_nal_t *nals, int nnal)
  49 {
  50     u_char *p = buf;
  51     int i;
  52
  53     for(i = 0; i < nnal; i++){
  54         int s = x264_nal_encode(p, &size, 1, nals + i);
  55         if(s < 0)
  56             return -1;
  57         p += s;
  58     }
  59
  60     return p - buf;
  61 }
  62
  63 extern int
  64 X264_frame(AVCodecContext *ctx, uint8_t *buf, int bufsize, void *data)
  65 {
  66     X264Context *x4 = ctx->priv_data;
  67     AVFrame *frame = data;
  68     x264_nal_t *nal;
  69     int nnal, i;
  70     x264_picture_t pic_out;
  71
  72     x4->pic.img.i_csp = X264_CSP_I420;
  73     x4->pic.img.i_plane = 3;
  74
  75     for(i = 0; i < 3; i++){
  76         x4->pic.img.plane[i] = frame->data[i];
  77         x4->pic.img.i_stride[i] = frame->linesize[i];
  78     }
  79
  80     x4->pic.i_pts = frame->pts;
  81     x4->pic.i_type = X264_TYPE_AUTO;
  82
  83     if(x264_encoder_encode(x4->enc, &nal, &nnal, &x4->pic, &pic_out))
  84         return -1;
  85
  86     bufsize = encode_nals(buf, bufsize, nal, nnal);
  87     if(bufsize < 0)
  88         return -1;
  89
  90     /* FIXME: dts */
  91     x4->out_pic.pts = pic_out.i_pts;
  92
  93     switch(pic_out.i_type){
  94     case X264_TYPE_IDR:
  95     case X264_TYPE_I:
  96         x4->out_pic.pict_type = FF_I_TYPE;
  97         break;
  98     case X264_TYPE_P:
  99         x4->out_pic.pict_type = FF_P_TYPE;
 100         break;
 101     case X264_TYPE_B:
 102     case X264_TYPE_BREF:
 103         x4->out_pic.pict_type = FF_B_TYPE;
 104         break;
 105     }
 106
 107     x4->out_pic.key_frame = x4->out_pic.key_frame == FF_I_TYPE;
 108
 109     return bufsize;
 110 }
 111
 112 static int
 113 X264_close(AVCodecContext *avctx)
 114 {
 115     X264Context *x4 = avctx->priv_data;
 116
 117     if(x4->enc)
 118         x264_encoder_close(x4->enc);
 119
 120     return 0;
 121 }
 122
 123 extern int
 124 X264_init(AVCodecContext *avctx)
 125 {
 126     X264Context *x4 = avctx->priv_data;
 127
 128     x264_param_default(&x4->params);
 129
 130     x4->params.pf_log = X264_log;
 131     x4->params.p_log_private = avctx;
 132
 133     x4->params.i_keyint_max = avctx->gop_size;
 134     x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
 135     x4->params.rc.i_rc_buffer_size = avctx->rc_buffer_size / 1000;
 136     if(avctx->rc_buffer_size)
 137         x4->params.rc.b_cbr = 1;
 138     x4->params.rc.i_qp_min = avctx->qmin;
 139     x4->params.rc.i_qp_max = avctx->qmax;
 140     x4->params.rc.i_qp_step = avctx->max_qdiff;
 141
 142     x4->params.i_width = avctx->width;
 143     x4->params.i_height = avctx->height;
 144     x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
 145     x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
 146     x4->params.i_fps_num = avctx->frame_rate;
 147     x4->params.i_fps_den = avctx->frame_rate_base;
 148
 149     x4->enc = x264_encoder_open(&x4->params);
 150     if(!x4->enc)
 151         return -1;
 152
 153     avctx->coded_frame = &x4->out_pic;
 154
 155     return 0;
 156 }
 157
 158 AVCodec x264_encoder = {
 159     .name = "h264",
 160     .type = CODEC_TYPE_VIDEO,
 161     .id = CODEC_ID_H264,
 162     .priv_data_size = sizeof(X264Context),
 163     .init = X264_init,
 164     .encode = X264_frame,
 165     .close = X264_close,
 166     .pix_fmts = (enum PixelFormat[]) { PIX_FMT_YUV420P, -1 }
 167 };