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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "libavcodec/avcodec.h"
extern int avcodec_initialized;
struct vf_priv_s {
unsigned char* outbuf;
int outbuf_size;
AVCodecContext* context;
AVFrame* pic;
AVCodec* codec;
vo_mpegpes_t pes;
};
#define lavc_venc_context (*vf->priv->context)
//===========================================================================//
static int config(struct vf_instance* vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt){
if(vf_next_query_format(vf,IMGFMT_MPEGPES)<=0) return 0;
lavc_venc_context.width = width;
lavc_venc_context.height = height;
if(!lavc_venc_context.time_base.num || !lavc_venc_context.time_base.den){
// guess FPS:
switch(height){
case 240:
case 480:
lavc_venc_context.time_base= (AVRational){1001,30000};
break;
case 576:
case 288:
default:
lavc_venc_context.time_base= (AVRational){1,25};
break;
// lavc_venc_context.frame_rate=vo_fps*FRAME_RATE_BASE; // same as src
}
}
if(vf->priv->outbuf) free(vf->priv->outbuf);
vf->priv->outbuf_size=10000+width*height; // must be enough!
vf->priv->outbuf = malloc(vf->priv->outbuf_size);
if (avcodec_open(&lavc_venc_context, vf->priv->codec) != 0) {
mp_msg(MSGT_MENCODER,MSGL_ERR,MSGTR_CantOpenCodec);
return 0;
}
if (lavc_venc_context.codec->encode == NULL) {
mp_msg(MSGT_MENCODER,MSGL_ERR,"avcodec init failed (ctx->codec->encode == NULL)!\n");
return 0;
}
return vf_next_config(vf,width,height,d_width,d_height,flags,IMGFMT_MPEGPES);
}
static int put_image(struct vf_instance* vf, mp_image_t *mpi, double pts){
mp_image_t* dmpi;
int out_size;
AVFrame *pic= vf->priv->pic;
pic->data[0]=mpi->planes[0];
pic->data[1]=mpi->planes[1];
pic->data[2]=mpi->planes[2];
pic->linesize[0]=mpi->stride[0];
pic->linesize[1]=mpi->stride[1];
pic->linesize[2]=mpi->stride[2];
out_size = avcodec_encode_video(&lavc_venc_context,
vf->priv->outbuf, vf->priv->outbuf_size, pic);
if(out_size<=0) return 1;
dmpi=vf_get_image(vf->next,IMGFMT_MPEGPES,
MP_IMGTYPE_EXPORT, 0,
mpi->w, mpi->h);
vf->priv->pes.data=vf->priv->outbuf;
vf->priv->pes.size=out_size;
vf->priv->pes.id=0x1E0;
vf->priv->pes.timestamp=-1; // dunno
dmpi->planes[0]=(unsigned char*)&vf->priv->pes;
return vf_next_put_image(vf,dmpi, MP_NOPTS_VALUE);
}
//===========================================================================//
static int query_format(struct vf_instance* vf, unsigned int fmt){
switch(fmt){
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV:
return vf_next_query_format(vf, IMGFMT_MPEGPES) & (~(VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_ACCEPT_STRIDE));
}
return 0;
}
static int open(vf_instance_t *vf, char* args){
int p_quality=0;
float p_fps=0;
vf->config=config;
vf->put_image=put_image;
vf->query_format=query_format;
vf->priv=malloc(sizeof(struct vf_priv_s));
memset(vf->priv,0,sizeof(struct vf_priv_s));
if (!avcodec_initialized){
avcodec_init();
avcodec_register_all();
avcodec_initialized=1;
}
vf->priv->codec = (AVCodec *)avcodec_find_encoder_by_name("mpeg1video");
if (!vf->priv->codec) {
mp_msg(MSGT_MENCODER,MSGL_ERR,MSGTR_MissingLAVCcodec, "mpeg1video");
return 0;
}
vf->priv->context=avcodec_alloc_context();
vf->priv->pic = avcodec_alloc_frame();
// TODO: parse args ->
if(args) sscanf(args, "%d:%f", &p_quality, &p_fps);
if(p_quality<32){
// fixed qscale
lavc_venc_context.flags = CODEC_FLAG_QSCALE;
lavc_venc_context.global_quality =
vf->priv->pic->quality = (int)(FF_QP2LAMBDA * ((p_quality<1) ? 1 : p_quality) + 0.5);
} else {
// fixed bitrate (in kbits)
lavc_venc_context.bit_rate = 1000*p_quality;
}
lavc_venc_context.time_base.num = 1000*1001;
lavc_venc_context.time_base.den = (p_fps<1.0) ? 1000*1001*25 : (p_fps * lavc_venc_context.time_base.num);
lavc_venc_context.gop_size = 0; // I-only
lavc_venc_context.pix_fmt= PIX_FMT_YUV420P;
return 1;
}
const vf_info_t vf_info_lavc = {
"realtime mpeg1 encoding with libavcodec",
"lavc",
"A'rpi",
"",
open,
NULL
};
//===========================================================================//
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