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 #include "libavcodec/avcodec.h"
  14
  15 extern int avcodec_initialized;
  16
  17 struct vf_priv_s {
  18     unsigned char* outbuf;
  19     int outbuf_size;
  20     AVCodecContext* context;
  21     AVFrame* pic;
  22     AVCodec* codec;
  23     vo_mpegpes_t pes;
  24 };
  25
  26 #define lavc_venc_context (*vf->priv->context)
  27
  28 //===========================================================================//
  29
  30 static int config(struct vf_instance* vf,
  31         int width, int height, int d_width, int d_height,
  32         unsigned int flags, unsigned int outfmt){
  33     if(vf_next_query_format(vf,IMGFMT_MPEGPES)<=0) return 0;
  34
  35     lavc_venc_context.width = width;
  36     lavc_venc_context.height = height;
  37
  38     if(!lavc_venc_context.time_base.num || !lavc_venc_context.time_base.den){
  39         // guess FPS:
  40         switch(height){
  41         case 240:
  42         case 480:
  43             lavc_venc_context.time_base= (AVRational){1001,30000};
  44             break;
  45         case 576:
  46         case 288:
  47         default:
  48             lavc_venc_context.time_base= (AVRational){1,25};
  49             break;
  50 //          lavc_venc_context.frame_rate=vo_fps*FRAME_RATE_BASE; // same as src
  51         }
  52     }
  53
  54     if(vf->priv->outbuf) free(vf->priv->outbuf);
  55
  56     vf->priv->outbuf_size=10000+width*height;  // must be enough!
  57     vf->priv->outbuf = malloc(vf->priv->outbuf_size);
  58
  59     if (avcodec_open(&lavc_venc_context, vf->priv->codec) != 0) {
  60         mp_tmsg(MSGT_MENCODER,MSGL_ERR,"Could not open codec.\n");
  61         return 0;
  62     }
  63
  64     if (lavc_venc_context.codec->encode == NULL) {
  65         mp_msg(MSGT_MENCODER,MSGL_ERR,"avcodec init failed (ctx->codec->encode == NULL)!\n");
  66         return 0;
  67     }
  68
  69     return vf_next_config(vf,width,height,d_width,d_height,flags,IMGFMT_MPEGPES);
  70 }
  71
  72 static int put_image(struct vf_instance* vf, mp_image_t *mpi, double pts){
  73     mp_image_t* dmpi;
  74     int out_size;
  75     AVFrame *pic= vf->priv->pic;
  76
  77     pic->data[0]=mpi->planes[0];
  78     pic->data[1]=mpi->planes[1];
  79     pic->data[2]=mpi->planes[2];
  80     pic->linesize[0]=mpi->stride[0];
  81     pic->linesize[1]=mpi->stride[1];
  82     pic->linesize[2]=mpi->stride[2];
  83
  84     out_size = avcodec_encode_video(&lavc_venc_context,
  85         vf->priv->outbuf, vf->priv->outbuf_size, pic);
  86
  87     if(out_size<=0) return 1;
  88
  89     dmpi=vf_get_image(vf->next,IMGFMT_MPEGPES,
  90         MP_IMGTYPE_EXPORT, 0,
  91         mpi->w, mpi->h);
  92
  93     vf->priv->pes.data=vf->priv->outbuf;
  94     vf->priv->pes.size=out_size;
  95     vf->priv->pes.id=0x1E0;
  96     vf->priv->pes.timestamp=-1; // dunno
  97
  98     dmpi->planes[0]=(unsigned char*)&vf->priv->pes;
  99
 100     return vf_next_put_image(vf,dmpi, MP_NOPTS_VALUE);
 101 }
 102
 103 //===========================================================================//
 104
 105 static int query_format(struct vf_instance* vf, unsigned int fmt){
 106     switch(fmt){
 107     case IMGFMT_YV12:
 108     case IMGFMT_I420:
 109     case IMGFMT_IYUV:
 110         return vf_next_query_format(vf, IMGFMT_MPEGPES) & (~(VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_ACCEPT_STRIDE));
 111     }
 112     return 0;
 113 }
 114
 115 static int open(vf_instance_t *vf, char* args){
 116     int p_quality=0;
 117     float p_fps=0;
 118
 119     vf->config=config;
 120     vf->put_image=put_image;
 121     vf->query_format=query_format;
 122     vf->priv=malloc(sizeof(struct vf_priv_s));
 123     memset(vf->priv,0,sizeof(struct vf_priv_s));
 124
 125     if (!avcodec_initialized){
 126         avcodec_init();
 127         avcodec_register_all();
 128         avcodec_initialized=1;
 129     }
 130
 131     vf->priv->codec = (AVCodec *)avcodec_find_encoder_by_name("mpeg1video");
 132     if (!vf->priv->codec) {
 133         mp_tmsg(MSGT_MENCODER,MSGL_ERR,"Cannot find codec '%s' in libavcodec...\n", "mpeg1video");
 134         return 0;
 135     }
 136
 137     vf->priv->context=avcodec_alloc_context();
 138     vf->priv->pic = avcodec_alloc_frame();
 139
 140     // TODO: parse args ->
 141     if(args) sscanf(args, "%d:%f", &p_quality, &p_fps);
 142
 143     if(p_quality<32){
 144         // fixed qscale
 145         lavc_venc_context.flags = CODEC_FLAG_QSCALE;
 146         lavc_venc_context.global_quality =
 147         vf->priv->pic->quality = (int)(FF_QP2LAMBDA * ((p_quality<1) ? 1 : p_quality) + 0.5);
 148     } else {
 149         // fixed bitrate (in kbits)
 150         lavc_venc_context.bit_rate = 1000*p_quality;
 151     }
 152     lavc_venc_context.time_base.num = 1000*1001;
 153     lavc_venc_context.time_base.den = (p_fps<1.0) ? 1000*1001*25 : (p_fps * lavc_venc_context.time_base.num);
 154     lavc_venc_context.gop_size = 0; // I-only
 155     lavc_venc_context.pix_fmt= PIX_FMT_YUV420P;
 156
 157     return 1;
 158 }
 159
 160 const vf_info_t vf_info_lavc = {
 161     "realtime mpeg1 encoding with libavcodec",
 162     "lavc",
 163     "A'rpi",
 164     "",
 165     open,
 166     NULL
 167 };
 168
 169 //===========================================================================//