libmpcodecs/vf_lavc.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <inttypes.h>
  23
  24 #include "config.h"
  25 #include "mp_msg.h"
  26
  27 #include "img_format.h"
  28 #include "mp_image.h"
  29 #include "vf.h"
  30 #include "vd_ffmpeg.h"
  31 #include "libavcodec/avcodec.h"
  32
  33
  34 struct vf_priv_s {
  35     unsigned char* outbuf;
  36     int outbuf_size;
  37     AVCodecContext* context;
  38     AVFrame* pic;
  39     AVCodec* codec;
  40     vo_mpegpes_t pes;
  41 };
  42
  43 #define lavc_venc_context (*vf->priv->context)
  44
  45 //===========================================================================//
  46
  47 static int config(struct vf_instance *vf,
  48         int width, int height, int d_width, int d_height,
  49         unsigned int flags, unsigned int outfmt){
  50     if(vf_next_query_format(vf,IMGFMT_MPEGPES)<=0) return 0;
  51
  52     lavc_venc_context.width = width;
  53     lavc_venc_context.height = height;
  54
  55     if(!lavc_venc_context.time_base.num || !lavc_venc_context.time_base.den){
  56         // guess FPS:
  57         switch(height){
  58         case 240:
  59         case 480:
  60             lavc_venc_context.time_base= (AVRational){1001,30000};
  61             break;
  62         case 576:
  63         case 288:
  64         default:
  65             lavc_venc_context.time_base= (AVRational){1,25};
  66             break;
  67 //          lavc_venc_context.frame_rate=vo_fps*FRAME_RATE_BASE; // same as src
  68         }
  69     }
  70
  71     if(vf->priv->outbuf) free(vf->priv->outbuf);
  72
  73     vf->priv->outbuf_size=10000+width*height;  // must be enough!
  74     vf->priv->outbuf = malloc(vf->priv->outbuf_size);
  75
  76     if (avcodec_open(&lavc_venc_context, vf->priv->codec) != 0) {
  77         mp_tmsg(MSGT_MENCODER,MSGL_ERR,"Could not open codec.\n");
  78         return 0;
  79     }
  80
  81     if (lavc_venc_context.codec->encode == NULL) {
  82         mp_msg(MSGT_MENCODER,MSGL_ERR,"avcodec init failed (ctx->codec->encode == NULL)!\n");
  83         return 0;
  84     }
  85
  86     return vf_next_config(vf,width,height,d_width,d_height,flags,IMGFMT_MPEGPES);
  87 }
  88
  89 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
  90     mp_image_t* dmpi;
  91     int out_size;
  92     AVFrame *pic= vf->priv->pic;
  93
  94     pic->data[0]=mpi->planes[0];
  95     pic->data[1]=mpi->planes[1];
  96     pic->data[2]=mpi->planes[2];
  97     pic->linesize[0]=mpi->stride[0];
  98     pic->linesize[1]=mpi->stride[1];
  99     pic->linesize[2]=mpi->stride[2];
 100
 101     out_size = avcodec_encode_video(&lavc_venc_context,
 102         vf->priv->outbuf, vf->priv->outbuf_size, pic);
 103
 104     if(out_size<=0) return 1;
 105
 106     dmpi=vf_get_image(vf->next,IMGFMT_MPEGPES,
 107         MP_IMGTYPE_EXPORT, 0,
 108         mpi->w, mpi->h);
 109
 110     vf->priv->pes.data=vf->priv->outbuf;
 111     vf->priv->pes.size=out_size;
 112     vf->priv->pes.id=0x1E0;
 113     vf->priv->pes.timestamp=-1; // dunno
 114
 115     dmpi->planes[0]=(unsigned char*)&vf->priv->pes;
 116
 117     return vf_next_put_image(vf,dmpi, MP_NOPTS_VALUE);
 118 }
 119
 120 //===========================================================================//
 121
 122 static int query_format(struct vf_instance *vf, unsigned int fmt){
 123     switch(fmt){
 124     case IMGFMT_YV12:
 125     case IMGFMT_I420:
 126     case IMGFMT_IYUV:
 127         return vf_next_query_format(vf, IMGFMT_MPEGPES) & (~(VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_ACCEPT_STRIDE));
 128     }
 129     return 0;
 130 }
 131
 132 static int vf_open(vf_instance_t *vf, char *args){
 133     int p_quality=0;
 134     float p_fps=0;
 135
 136     vf->config=config;
 137     vf->put_image=put_image;
 138     vf->query_format=query_format;
 139     vf->priv=malloc(sizeof(struct vf_priv_s));
 140     memset(vf->priv,0,sizeof(struct vf_priv_s));
 141
 142     init_avcodec();
 143
 144     vf->priv->codec = (AVCodec *)avcodec_find_encoder_by_name("mpeg1video");
 145     if (!vf->priv->codec) {
 146         mp_tmsg(MSGT_MENCODER,MSGL_ERR,"Cannot find codec '%s' in libavcodec...\n", "mpeg1video");
 147         return 0;
 148     }
 149
 150     vf->priv->context=avcodec_alloc_context();
 151     vf->priv->pic = avcodec_alloc_frame();
 152
 153     // TODO: parse args ->
 154     if(args) sscanf(args, "%d:%f", &p_quality, &p_fps);
 155
 156     if(p_quality<32){
 157         // fixed qscale
 158         lavc_venc_context.flags = CODEC_FLAG_QSCALE;
 159         lavc_venc_context.global_quality =
 160         vf->priv->pic->quality = (int)(FF_QP2LAMBDA * ((p_quality<1) ? 1 : p_quality) + 0.5);
 161     } else {
 162         // fixed bitrate (in kbits)
 163         lavc_venc_context.bit_rate = 1000*p_quality;
 164     }
 165     lavc_venc_context.time_base.num = 1000*1001;
 166     lavc_venc_context.time_base.den = (p_fps<1.0) ? 1000*1001*25 : (p_fps * lavc_venc_context.time_base.num);
 167     lavc_venc_context.gop_size = 0; // I-only
 168     lavc_venc_context.pix_fmt= PIX_FMT_YUV420P;
 169
 170     return 1;
 171 }
 172
 173 const vf_info_t vf_info_lavc = {
 174     "realtime mpeg1 encoding with libavcodec",
 175     "lavc",
 176     "A'rpi",
 177     "",
 178     vf_open,
 179     NULL
 180 };
 181
 182 //===========================================================================//