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 struct vf_priv_s {
  34     unsigned char* outbuf;
  35     int outbuf_size;
  36     AVCodecContext* context;
  37     AVFrame* pic;
  38     AVCodec* codec;
  39     vo_mpegpes_t pes;
  40 };
  41
  42 #define lavc_venc_context (*vf->priv->context)
  43
  44 //===========================================================================//
  45
  46 static int config(struct vf_instance *vf,
  47         int width, int height, int d_width, int d_height,
  48         unsigned int flags, unsigned int outfmt){
  49     if(vf_next_query_format(vf,IMGFMT_MPEGPES)<=0) return 0;
  50
  51     lavc_venc_context.width = width;
  52     lavc_venc_context.height = height;
  53
  54     if(!lavc_venc_context.time_base.num || !lavc_venc_context.time_base.den){
  55         // guess FPS:
  56         switch(height){
  57         case 240:
  58         case 480:
  59             lavc_venc_context.time_base= (AVRational){1001,30000};
  60             break;
  61         case 576:
  62         case 288:
  63         default:
  64             lavc_venc_context.time_base= (AVRational){1,25};
  65             break;
  66 //          lavc_venc_context.frame_rate=vo_fps*FRAME_RATE_BASE; // same as src
  67         }
  68     }
  69
  70     free(vf->priv->outbuf);
  71
  72     vf->priv->outbuf_size=10000+width*height;  // must be enough!
  73     vf->priv->outbuf = malloc(vf->priv->outbuf_size);
  74
  75     if (avcodec_open(&lavc_venc_context, vf->priv->codec) != 0) {
  76         mp_tmsg(MSGT_VFILTER,MSGL_ERR,"Could not open codec.\n");
  77         return 0;
  78     }
  79
  80     if (lavc_venc_context.codec->encode == NULL) {
  81         mp_msg(MSGT_VFILTER,MSGL_ERR,"avcodec init failed (ctx->codec->encode == NULL)!\n");
  82         return 0;
  83     }
  84
  85     return vf_next_config(vf,width,height,d_width,d_height,flags,IMGFMT_MPEGPES);
  86 }
  87
  88 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
  89     mp_image_t* dmpi;
  90     int out_size;
  91     AVFrame *pic= vf->priv->pic;
  92
  93     pic->data[0]=mpi->planes[0];
  94     pic->data[1]=mpi->planes[1];
  95     pic->data[2]=mpi->planes[2];
  96     pic->linesize[0]=mpi->stride[0];
  97     pic->linesize[1]=mpi->stride[1];
  98     pic->linesize[2]=mpi->stride[2];
  99
 100     out_size = avcodec_encode_video(&lavc_venc_context,
 101         vf->priv->outbuf, vf->priv->outbuf_size, pic);
 102
 103     if(out_size<=0) return 1;
 104
 105     dmpi=vf_get_image(vf->next,IMGFMT_MPEGPES,
 106         MP_IMGTYPE_EXPORT, 0,
 107         mpi->w, mpi->h);
 108
 109     vf->priv->pes.data=vf->priv->outbuf;
 110     vf->priv->pes.size=out_size;
 111     vf->priv->pes.id=0x1E0;
 112     vf->priv->pes.timestamp=-1; // dunno
 113
 114     dmpi->planes[0]=(unsigned char*)&vf->priv->pes;
 115
 116     return vf_next_put_image(vf,dmpi, pts);
 117 }
 118
 119 //===========================================================================//
 120
 121 static int query_format(struct vf_instance *vf, unsigned int fmt){
 122     switch(fmt){
 123     case IMGFMT_YV12:
 124     case IMGFMT_I420:
 125     case IMGFMT_IYUV:
 126         return vf_next_query_format(vf, IMGFMT_MPEGPES) & (~(VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_ACCEPT_STRIDE));
 127     }
 128     return 0;
 129 }
 130
 131 static int vf_open(vf_instance_t *vf, char *args){
 132     int p_quality=0;
 133     float p_fps=0;
 134
 135     vf->config=config;
 136     vf->put_image=put_image;
 137     vf->query_format=query_format;
 138     vf->priv=malloc(sizeof(struct vf_priv_s));
 139     memset(vf->priv,0,sizeof(struct vf_priv_s));
 140
 141     init_avcodec();
 142
 143     vf->priv->codec = (AVCodec *)avcodec_find_encoder_by_name("mpeg1video");
 144     if (!vf->priv->codec) {
 145         mp_tmsg(MSGT_VFILTER,MSGL_ERR,"Cannot find codec '%s' in libavcodec...\n", "mpeg1video");
 146         return 0;
 147     }
 148
 149     vf->priv->context=avcodec_alloc_context();
 150     vf->priv->pic = avcodec_alloc_frame();
 151
 152     // TODO: parse args ->
 153     if(args) sscanf(args, "%d:%f", &p_quality, &p_fps);
 154
 155     if(p_quality<32){
 156         // fixed qscale
 157         lavc_venc_context.flags = CODEC_FLAG_QSCALE;
 158         lavc_venc_context.global_quality =
 159         vf->priv->pic->quality = (int)(FF_QP2LAMBDA * ((p_quality<1) ? 1 : p_quality) + 0.5);
 160     } else {
 161         // fixed bitrate (in kbits)
 162         lavc_venc_context.bit_rate = 1000*p_quality;
 163     }
 164     lavc_venc_context.time_base.num = 1000*1001;
 165     lavc_venc_context.time_base.den = (p_fps<1.0) ? 1000*1001*25 : (p_fps * lavc_venc_context.time_base.num);
 166     lavc_venc_context.gop_size = 0; // I-only
 167     lavc_venc_context.pix_fmt= PIX_FMT_YUV420P;
 168
 169     return 1;
 170 }
 171
 172 const vf_info_t vf_info_lavc = {
 173     "realtime mpeg1 encoding with libavcodec",
 174     "lavc",
 175     "A'rpi",
 176     "",
 177     vf_open,
 178     NULL
 179 };
 180
 181 //===========================================================================//