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 "libavcodec/avcodec.h"
  31
  32 struct vf_priv_s {
  33     unsigned char* outbuf;
  34     int outbuf_size;
  35     AVCodecContext* context;
  36     AVFrame* pic;
  37     AVCodec* codec;
  38     vo_mpegpes_t pes;
  39 };
  40
  41 #define lavc_venc_context (*vf->priv->context)
  42
  43 //===========================================================================//
  44
  45 static int config(struct vf_instance *vf,
  46         int width, int height, int d_width, int d_height,
  47         unsigned int flags, unsigned int outfmt){
  48     if(vf_next_query_format(vf,IMGFMT_MPEGPES)<=0) return 0;
  49
  50     lavc_venc_context.width = width;
  51     lavc_venc_context.height = height;
  52
  53     if(!lavc_venc_context.time_base.num || !lavc_venc_context.time_base.den){
  54         // guess FPS:
  55         switch(height){
  56         case 240:
  57         case 480:
  58             lavc_venc_context.time_base= (AVRational){1001,30000};
  59             break;
  60         case 576:
  61         case 288:
  62         default:
  63             lavc_venc_context.time_base= (AVRational){1,25};
  64             break;
  65 //          lavc_venc_context.frame_rate=vo_fps*FRAME_RATE_BASE; // same as src
  66         }
  67     }
  68
  69     free(vf->priv->outbuf);
  70
  71     vf->priv->outbuf_size=10000+width*height;  // must be enough!
  72     vf->priv->outbuf = malloc(vf->priv->outbuf_size);
  73
  74     if (avcodec_open2(&lavc_venc_context, vf->priv->codec, NULL) != 0) {
  75         mp_tmsg(MSGT_VFILTER,MSGL_ERR,"Could not open codec.\n");
  76         return 0;
  77     }
  78
  79     return vf_next_config(vf,width,height,d_width,d_height,flags,IMGFMT_MPEGPES);
  80 }
  81
  82 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
  83     mp_image_t* dmpi;
  84     int out_size;
  85     AVFrame *pic= vf->priv->pic;
  86
  87     pic->data[0]=mpi->planes[0];
  88     pic->data[1]=mpi->planes[1];
  89     pic->data[2]=mpi->planes[2];
  90     pic->linesize[0]=mpi->stride[0];
  91     pic->linesize[1]=mpi->stride[1];
  92     pic->linesize[2]=mpi->stride[2];
  93
  94     out_size = avcodec_encode_video(&lavc_venc_context,
  95         vf->priv->outbuf, vf->priv->outbuf_size, pic);
  96
  97     if(out_size<=0) return 1;
  98
  99     dmpi=vf_get_image(vf->next,IMGFMT_MPEGPES,
 100         MP_IMGTYPE_EXPORT, 0,
 101         mpi->w, mpi->h);
 102
 103     vf->priv->pes.data=vf->priv->outbuf;
 104     vf->priv->pes.size=out_size;
 105     vf->priv->pes.id=0x1E0;
 106     vf->priv->pes.timestamp=-1; // dunno
 107
 108     dmpi->planes[0]=(unsigned char*)&vf->priv->pes;
 109
 110     return vf_next_put_image(vf,dmpi, pts);
 111 }
 112
 113 //===========================================================================//
 114
 115 static int query_format(struct vf_instance *vf, unsigned int fmt){
 116     switch(fmt){
 117     case IMGFMT_YV12:
 118     case IMGFMT_I420:
 119     case IMGFMT_IYUV:
 120         return vf_next_query_format(vf, IMGFMT_MPEGPES) & (~(VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_ACCEPT_STRIDE));
 121     }
 122     return 0;
 123 }
 124
 125 static int vf_open(vf_instance_t *vf, char *args){
 126     int p_quality=0;
 127     float p_fps=0;
 128
 129     vf->config=config;
 130     vf->put_image=put_image;
 131     vf->query_format=query_format;
 132     vf->priv=malloc(sizeof(struct vf_priv_s));
 133     memset(vf->priv,0,sizeof(struct vf_priv_s));
 134
 135     vf->priv->codec = (AVCodec *)avcodec_find_encoder_by_name("mpeg1video");
 136     if (!vf->priv->codec) {
 137         mp_tmsg(MSGT_VFILTER,MSGL_ERR,"Cannot find codec '%s' in libavcodec...\n", "mpeg1video");
 138         return 0;
 139     }
 140
 141     vf->priv->context=avcodec_alloc_context3(vf->priv->codec);
 142     vf->priv->pic = avcodec_alloc_frame();
 143
 144     // TODO: parse args ->
 145     if(args) sscanf(args, "%d:%f", &p_quality, &p_fps);
 146
 147     if(p_quality<32){
 148         // fixed qscale
 149         lavc_venc_context.flags = CODEC_FLAG_QSCALE;
 150         lavc_venc_context.global_quality =
 151         vf->priv->pic->quality = (int)(FF_QP2LAMBDA * ((p_quality<1) ? 1 : p_quality) + 0.5);
 152     } else {
 153         // fixed bitrate (in kbits)
 154         lavc_venc_context.bit_rate = 1000*p_quality;
 155     }
 156     lavc_venc_context.time_base.num = 1000*1001;
 157     lavc_venc_context.time_base.den = (p_fps<1.0) ? 1000*1001*25 : (p_fps * lavc_venc_context.time_base.num);
 158     lavc_venc_context.gop_size = 0; // I-only
 159     lavc_venc_context.pix_fmt= PIX_FMT_YUV420P;
 160
 161     return 1;
 162 }
 163
 164 const vf_info_t vf_info_lavc = {
 165     "realtime mpeg1 encoding with libavcodec",
 166     "lavc",
 167     "A'rpi",
 168     "",
 169     vf_open,
 170     NULL
 171 };
 172
 173 //===========================================================================//