libmpcodecs/vf_lavc.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <inttypes.h>
   5
   6 #include "config.h"
   7 #include "mp_msg.h"
   8 #include "help_mp.h"
   9
  10 #include "img_format.h"
  11 #include "mp_image.h"
  12 #include "vf.h"
  13
  14 #ifdef USE_LIBAVCODEC_SO
  15 #include <ffmpeg/avcodec.h>
  16 #else
  17 #include "libavcodec/avcodec.h"
  18 #endif
  19
  20 extern int avcodec_inited;
  21
  22 struct vf_priv_s {
  23     unsigned char* outbuf;
  24     int outbuf_size;
  25     AVCodecContext* context;
  26     AVFrame* pic;
  27     AVCodec* codec;
  28     vo_mpegpes_t pes;
  29 };
  30
  31 #define lavc_venc_context (*vf->priv->context)
  32
  33 //===========================================================================//
  34
  35 static int config(struct vf_instance_s* vf,
  36         int width, int height, int d_width, int d_height,
  37         unsigned int flags, unsigned int outfmt){
  38     if(vf_next_query_format(vf,IMGFMT_MPEGPES)<=0) return 0;
  39
  40     lavc_venc_context.width = width;
  41     lavc_venc_context.height = height;
  42
  43     if(!lavc_venc_context.time_base.num || !lavc_venc_context.time_base.den){
  44         // guess FPS:
  45         switch(height){
  46         case 240:
  47         case 480:
  48             lavc_venc_context.time_base= (AVRational){1001,30000};
  49             break;
  50         case 576:
  51         case 288:
  52         default:
  53             lavc_venc_context.time_base= (AVRational){1,25};
  54             break;
  55 //          lavc_venc_context.frame_rate=vo_fps*FRAME_RATE_BASE; // same as src
  56         }
  57     }
  58
  59     if(vf->priv->outbuf) free(vf->priv->outbuf);
  60
  61     vf->priv->outbuf_size=10000+width*height;  // must be enough!
  62     vf->priv->outbuf = malloc(vf->priv->outbuf_size);
  63
  64     if (avcodec_open(&lavc_venc_context, vf->priv->codec) != 0) {
  65         mp_msg(MSGT_MENCODER,MSGL_ERR,MSGTR_CantOpenCodec);
  66         return 0;
  67     }
  68
  69     if (lavc_venc_context.codec->encode == NULL) {
  70         mp_msg(MSGT_MENCODER,MSGL_ERR,"avcodec init failed (ctx->codec->encode == NULL)!\n");
  71         return 0;
  72     }
  73
  74     return vf_next_config(vf,width,height,d_width,d_height,flags,IMGFMT_MPEGPES);
  75 }
  76
  77 static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
  78     mp_image_t* dmpi;
  79     int out_size;
  80     AVFrame *pic= vf->priv->pic;
  81
  82     pic->data[0]=mpi->planes[0];
  83     pic->data[1]=mpi->planes[1];
  84     pic->data[2]=mpi->planes[2];
  85     pic->linesize[0]=mpi->stride[0];
  86     pic->linesize[1]=mpi->stride[1];
  87     pic->linesize[2]=mpi->stride[2];
  88
  89     out_size = avcodec_encode_video(&lavc_venc_context,
  90         vf->priv->outbuf, vf->priv->outbuf_size, pic);
  91
  92     if(out_size<=0) return 1;
  93
  94     dmpi=vf_get_image(vf->next,IMGFMT_MPEGPES,
  95         MP_IMGTYPE_EXPORT, 0,
  96         mpi->w, mpi->h);
  97
  98     vf->priv->pes.data=vf->priv->outbuf;
  99     vf->priv->pes.size=out_size;
 100     vf->priv->pes.id=0x1E0;
 101     vf->priv->pes.timestamp=-1; // dunno
 102
 103     dmpi->planes[0]=(unsigned char*)&vf->priv->pes;
 104
 105     return vf_next_put_image(vf,dmpi, MP_NOPTS_VALUE);
 106 }
 107
 108 //===========================================================================//
 109
 110 static int query_format(struct vf_instance_s* vf, unsigned int fmt){
 111     switch(fmt){
 112     case IMGFMT_YV12:
 113     case IMGFMT_I420:
 114     case IMGFMT_IYUV:
 115         return (vf_next_query_format(vf,IMGFMT_MPEGPES) & (~(VFCAP_CSP_SUPPORTED_BY_HW|VFCAP_ACCEPT_STRIDE)));
 116     }
 117     return 0;
 118 }
 119
 120 static int open(vf_instance_t *vf, char* args){
 121     int p_quality=0;
 122     float p_fps=0;
 123
 124     vf->config=config;
 125     vf->put_image=put_image;
 126     vf->query_format=query_format;
 127     vf->priv=malloc(sizeof(struct vf_priv_s));
 128     memset(vf->priv,0,sizeof(struct vf_priv_s));
 129
 130     if (!avcodec_inited){
 131         avcodec_init();
 132         avcodec_register_all();
 133         avcodec_inited=1;
 134     }
 135
 136     vf->priv->codec = (AVCodec *)avcodec_find_encoder_by_name("mpeg1video");
 137     if (!vf->priv->codec) {
 138         mp_msg(MSGT_MENCODER,MSGL_ERR,MSGTR_MissingLAVCcodec, "mpeg1video");
 139         return 0;
 140     }
 141
 142     vf->priv->context=avcodec_alloc_context();
 143     vf->priv->pic = avcodec_alloc_frame();
 144
 145     // TODO: parse args ->
 146     if(args) sscanf(args, "%d:%f", &p_quality, &p_fps);
 147
 148     if(p_quality<32){
 149         // fixed qscale
 150         lavc_venc_context.flags = CODEC_FLAG_QSCALE;
 151         lavc_venc_context.global_quality =
 152         vf->priv->pic->quality = (int)(FF_QP2LAMBDA * ((p_quality<1) ? 1 : p_quality) + 0.5);
 153     } else {
 154         // fixed bitrate (in kbits)
 155         lavc_venc_context.bit_rate = 1000*p_quality;
 156     }
 157     lavc_venc_context.time_base.num = 1000*1001;
 158     lavc_venc_context.time_base.den = (p_fps<1.0) ? 1000*1001*25 : (p_fps * lavc_venc_context.time_base.num);
 159     lavc_venc_context.gop_size = 0; // I-only
 160     lavc_venc_context.pix_fmt= PIX_FMT_YUV420P;
 161
 162     return 1;
 163 }
 164
 165 const vf_info_t vf_info_lavc = {
 166     "realtime mpeg1 encoding with libavcodec",
 167     "lavc",
 168     "A'rpi",
 169     "",
 170     open,
 171     NULL
 172 };
 173
 174 //===========================================================================//