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     if (lavc_venc_context.codec->encode == NULL) {
  80         mp_msg(MSGT_VFILTER,MSGL_ERR,"avcodec init failed (ctx->codec->encode == NULL)!\n");
  81         return 0;
  82     }
  83
  84     return vf_next_config(vf,width,height,d_width,d_height,flags,IMGFMT_MPEGPES);
  85 }
  86
  87 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
  88     mp_image_t* dmpi;
  89     int out_size;
  90     AVFrame *pic= vf->priv->pic;
  91
  92     pic->data[0]=mpi->planes[0];
  93     pic->data[1]=mpi->planes[1];
  94     pic->data[2]=mpi->planes[2];
  95     pic->linesize[0]=mpi->stride[0];
  96     pic->linesize[1]=mpi->stride[1];
  97     pic->linesize[2]=mpi->stride[2];
  98
  99     out_size = avcodec_encode_video(&lavc_venc_context,
 100         vf->priv->outbuf, vf->priv->outbuf_size, pic);
 101
 102     if(out_size<=0) return 1;
 103
 104     dmpi=vf_get_image(vf->next,IMGFMT_MPEGPES,
 105         MP_IMGTYPE_EXPORT, 0,
 106         mpi->w, mpi->h);
 107
 108     vf->priv->pes.data=vf->priv->outbuf;
 109     vf->priv->pes.size=out_size;
 110     vf->priv->pes.id=0x1E0;
 111     vf->priv->pes.timestamp=-1; // dunno
 112
 113     dmpi->planes[0]=(unsigned char*)&vf->priv->pes;
 114
 115     return vf_next_put_image(vf,dmpi, pts);
 116 }
 117
 118 //===========================================================================//
 119
 120 static int query_format(struct vf_instance *vf, unsigned int fmt){
 121     switch(fmt){
 122     case IMGFMT_YV12:
 123     case IMGFMT_I420:
 124     case IMGFMT_IYUV:
 125         return vf_next_query_format(vf, IMGFMT_MPEGPES) & (~(VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_ACCEPT_STRIDE));
 126     }
 127     return 0;
 128 }
 129
 130 static int vf_open(vf_instance_t *vf, char *args){
 131     int p_quality=0;
 132     float p_fps=0;
 133
 134     vf->config=config;
 135     vf->put_image=put_image;
 136     vf->query_format=query_format;
 137     vf->priv=malloc(sizeof(struct vf_priv_s));
 138     memset(vf->priv,0,sizeof(struct vf_priv_s));
 139
 140     vf->priv->codec = (AVCodec *)avcodec_find_encoder_by_name("mpeg1video");
 141     if (!vf->priv->codec) {
 142         mp_tmsg(MSGT_VFILTER,MSGL_ERR,"Cannot find codec '%s' in libavcodec...\n", "mpeg1video");
 143         return 0;
 144     }
 145
 146     vf->priv->context=avcodec_alloc_context3(vf->priv->codec);
 147     vf->priv->pic = avcodec_alloc_frame();
 148
 149     // TODO: parse args ->
 150     if(args) sscanf(args, "%d:%f", &p_quality, &p_fps);
 151
 152     if(p_quality<32){
 153         // fixed qscale
 154         lavc_venc_context.flags = CODEC_FLAG_QSCALE;
 155         lavc_venc_context.global_quality =
 156         vf->priv->pic->quality = (int)(FF_QP2LAMBDA * ((p_quality<1) ? 1 : p_quality) + 0.5);
 157     } else {
 158         // fixed bitrate (in kbits)
 159         lavc_venc_context.bit_rate = 1000*p_quality;
 160     }
 161     lavc_venc_context.time_base.num = 1000*1001;
 162     lavc_venc_context.time_base.den = (p_fps<1.0) ? 1000*1001*25 : (p_fps * lavc_venc_context.time_base.num);
 163     lavc_venc_context.gop_size = 0; // I-only
 164     lavc_venc_context.pix_fmt= PIX_FMT_YUV420P;
 165
 166     return 1;
 167 }
 168
 169 const vf_info_t vf_info_lavc = {
 170     "realtime mpeg1 encoding with libavcodec",
 171     "lavc",
 172     "A'rpi",
 173     "",
 174     vf_open,
 175     NULL
 176 };
 177
 178 //===========================================================================//