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mpv/libmpcodecs/vd_ffmpeg.c

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#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <time.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#ifdef USE_LIBAVCODEC
#include "bswap.h"
#include "vd_internal.h"
static vd_info_t info = {
"FFmpeg's libavcodec codec family",
"ffmpeg",
"A'rpi",
"A'rpi, Michael, Alex",
"native codecs (http://ffmpeg.sf.net/)"
};
LIBVD_EXTERN(ffmpeg)
#include "../postproc/rgb2rgb.h"
#ifdef USE_LIBAVCODEC_SO
#include <ffmpeg/avcodec.h>
#else
#include "libavcodec/avcodec.h"
#endif
#if LIBAVCODEC_BUILD < 4641
#error we dont support libavcodec prior to build 4641, get the latest libavcodec CVS
#endif
#if LIBAVCODEC_BUILD < 4645
#warning your version of libavcodec is old, u might want to get a newer one
#endif
#if LIBAVCODEC_BUILD < 4645
#define AVFrame AVVideoFrame
#define coded_frame coded_picture
#endif
#if LIBAVCODEC_BUILD < 4654
#define PIX_FMT_RGB24 PIX_FMT_BGR24
#define PIX_FMT_RGBA32 PIX_FMT_BGRA32
#endif
int avcodec_inited=0;
#if defined(FF_POSTPROCESS) && defined(MBR)
int quant_store[MBR+1][MBC+1];
#endif
typedef struct {
AVCodecContext *avctx;
AVFrame *pic;
float last_aspect;
int do_slices;
int do_dr1;
int vo_inited;
int convert;
int best_csp;
int b_age;
int ip_age[2];
int qp_stat[32];
double qp_sum;
double inv_qp_sum;
} vd_ffmpeg_ctx;
//#ifdef FF_POSTPROCESS
//unsigned int lavc_pp=0;
//#endif
#include "cfgparser.h"
static int get_buffer(AVCodecContext *avctx, AVFrame *pic);
static void release_buffer(AVCodecContext *avctx, AVFrame *pic);
static int lavc_param_workaround_bugs= FF_BUG_AUTODETECT;
static int lavc_param_error_resilience=2;
static int lavc_param_error_concealment=3;
static int lavc_param_gray=0;
static int lavc_param_vstats=0;
static int lavc_param_idct_algo=0;
static int lavc_param_debug=0;
struct config lavc_decode_opts_conf[]={
{"bug", &lavc_param_workaround_bugs, CONF_TYPE_INT, CONF_RANGE, -1, 999999, NULL},
{"er", &lavc_param_error_resilience, CONF_TYPE_INT, CONF_RANGE, 0, 99, NULL},
{"gray", &lavc_param_gray, CONF_TYPE_FLAG, 0, 0, CODEC_FLAG_PART, NULL},
{"idct", &lavc_param_idct_algo, CONF_TYPE_INT, CONF_RANGE, 0, 99, NULL},
{"ec", &lavc_param_error_concealment, CONF_TYPE_INT, CONF_RANGE, 0, 99, NULL},
{"vstats", &lavc_param_vstats, CONF_TYPE_FLAG, 0, 0, 1, NULL},
#if LIBAVCODEC_BUILD >= 4642
{"debug", &lavc_param_debug, CONF_TYPE_INT, CONF_RANGE, 0, 9999999, NULL},
#endif
{NULL, NULL, 0, 0, 0, 0, NULL}
};
// to set/get/query special features/parameters
static int control(sh_video_t *sh,int cmd,void* arg,...){
vd_ffmpeg_ctx *ctx = sh->context;
AVCodecContext *avctx = ctx->avctx;
switch(cmd){
case VDCTRL_QUERY_FORMAT:
if( (*((int*)arg)) == ctx->best_csp ) return CONTROL_TRUE;//supported
// possible conversions:
switch( (*((int*)arg)) ){
case IMGFMT_YV12:
case IMGFMT_IYUV:
case IMGFMT_I420:
// "converted" using pointer/stride modification
if(avctx->pix_fmt==PIX_FMT_YUV420P) return CONTROL_TRUE;// u/v swap
if(avctx->pix_fmt==PIX_FMT_YUV422P) return CONTROL_TRUE;// half stride
break;
#if 1
case IMGFMT_YUY2:
// converted using yuv422ptoyuy2()
if(avctx->pix_fmt==PIX_FMT_YUV422P) return CONTROL_TRUE;
break;
}
#endif
return CONTROL_FALSE;
}
return CONTROL_UNKNOWN;
}
// init driver
static int init(sh_video_t *sh){
AVCodecContext *avctx;
vd_ffmpeg_ctx *ctx;
AVCodec *lavc_codec;
if(!avcodec_inited){
avcodec_init();
avcodec_register_all();
avcodec_inited=1;
}
ctx = sh->context = malloc(sizeof(vd_ffmpeg_ctx));
if (!ctx)
return(0);
memset(ctx, 0, sizeof(vd_ffmpeg_ctx));
lavc_codec = (AVCodec *)avcodec_find_decoder_by_name(sh->codec->dll);
if(!lavc_codec){
mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_MissingLAVCcodec,sh->codec->dll);
return 0;
}
if(vd_use_slices && lavc_codec->capabilities&CODEC_CAP_DRAW_HORIZ_BAND)
ctx->do_slices=1;
if(lavc_codec->capabilities&CODEC_CAP_DR1)
ctx->do_dr1=1;
//XXX:FIXME:HACK:UGLY 422P with direct rendering is buggy cuz of that chroma stride trick ...
if(sh->format == mmioFOURCC('H','F','Y','U'))
ctx->do_dr1=0;
ctx->b_age= ctx->ip_age[0]= ctx->ip_age[1]= 256*256*256*64;
#if LIBAVCODEC_BUILD >= 4645
ctx->pic = avcodec_alloc_frame();
#else
ctx->pic = avcodec_alloc_picture();
#endif
ctx->avctx = avcodec_alloc_context();
avctx = ctx->avctx;
if(ctx->do_dr1){
avctx->flags|= CODEC_FLAG_EMU_EDGE;
avctx->get_buffer= get_buffer;
avctx->release_buffer= release_buffer;
}
#ifdef CODEC_FLAG_NOT_TRUNCATED
avctx->flags|= CODEC_FLAG_NOT_TRUNCATED;
#endif
avctx->width = sh->disp_w;
avctx->height= sh->disp_h;
avctx->workaround_bugs= lavc_param_workaround_bugs;
avctx->error_resilience= lavc_param_error_resilience;
if(lavc_param_gray) avctx->flags|= CODEC_FLAG_GRAY;
avctx->codec_tag= sh->format;
avctx->idct_algo= lavc_param_idct_algo;
avctx->error_concealment= lavc_param_error_concealment;
#if LIBAVCODEC_BUILD >= 4642
avctx->debug= lavc_param_debug;
#endif
mp_dbg(MSGT_DECVIDEO,MSGL_DBG2,"libavcodec.size: %d x %d\n",avctx->width,avctx->height);
/* AVRn stores huffman table in AVI header */
/* Pegasus MJPEG stores it also in AVI header, but it uses the common
MJPG fourcc :( */
if (sh->bih && (sh->bih->biSize != sizeof(BITMAPINFOHEADER)) &&
(sh->format == mmioFOURCC('A','V','R','n') ||
sh->format == mmioFOURCC('M','J','P','G')))
{
avctx->flags |= CODEC_FLAG_EXTERN_HUFF;
avctx->extradata_size = sh->bih->biSize-sizeof(BITMAPINFOHEADER);
avctx->extradata = malloc(avctx->extradata_size);
memcpy(avctx->extradata, sh->bih+sizeof(BITMAPINFOHEADER),
avctx->extradata_size);
#if 0
{
int x;
uint8_t *p = avctx->extradata;
for (x=0; x<avctx->extradata_size; x++)
printf("[%x] ", p[x]);
printf("\n");
}
#endif
}
if( sh->format == mmioFOURCC('R', 'V', '1', '0')
|| sh->format == mmioFOURCC('R', 'V', '1', '3')){
avctx->extradata_size= 8;
avctx->extradata = malloc(avctx->extradata_size);
if(sh->bih->biSize!=sizeof(*sh->bih)+8){
/* only 1 packet per frame & sub_id from fourcc */
((uint32_t*)avctx->extradata)[0] = 0;
avctx->sub_id=
((uint32_t*)avctx->extradata)[1] =
(sh->format == mmioFOURCC('R', 'V', '1', '3')) ? 0x10003001 : 0x10000000;
} else {
/* has extra slice header (demux_rm or rm->avi streamcopy) */
unsigned int* extrahdr=(unsigned int*)(sh->bih+1);
((uint32_t*)avctx->extradata)[0] = extrahdr[0];
avctx->sub_id=
((uint32_t*)avctx->extradata)[1] = extrahdr[1];
}
// printf("%X %X %d %d\n", extrahdr[0], extrahdr[1]);
}
if (sh->bih && (sh->bih->biSize != sizeof(BITMAPINFOHEADER)) &&
(sh->format == mmioFOURCC('M','4','S','2') ||
sh->format == mmioFOURCC('M','P','4','S') ||
sh->format == mmioFOURCC('H','F','Y','U') ||
sh->format == mmioFOURCC('W','M','V','2')
))
{
avctx->extradata_size = sh->bih->biSize-sizeof(BITMAPINFOHEADER);
avctx->extradata = malloc(avctx->extradata_size);
memcpy(avctx->extradata, sh->bih+1, avctx->extradata_size);
}
if(sh->bih)
avctx->bits_per_sample= sh->bih->biBitCount;
/* open it */
if (avcodec_open(avctx, lavc_codec) < 0) {
mp_msg(MSGT_DECVIDEO,MSGL_ERR, MSGTR_CantOpenCodec);
return 0;
}
mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: libavcodec init OK!\n");
ctx->last_aspect=-3;
return 1; //mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_YV12);
}
// uninit driver
static void uninit(sh_video_t *sh){
vd_ffmpeg_ctx *ctx = sh->context;
AVCodecContext *avctx = ctx->avctx;
if(lavc_param_vstats){
int i;
for(i=1; i<32; i++){
printf("QP: %d, count: %d\n", i, ctx->qp_stat[i]);
}
printf("Arithmetic mean of QP: %2.4f, Harmonic mean of QP: %2.4f\n",
ctx->qp_sum / avctx->coded_frame->coded_picture_number,
1.0/(ctx->inv_qp_sum / avctx->coded_frame->coded_picture_number)
);
}
if (avcodec_close(avctx) < 0)
mp_msg(MSGT_DECVIDEO,MSGL_ERR, MSGTR_CantCloseCodec);
if (avctx->extradata_size)
free(avctx->extradata);
avctx->extradata=NULL;
if(avctx->slice_offset!=NULL)
free(avctx->slice_offset);
avctx->slice_offset=NULL;
if (avctx)
free(avctx);
if (ctx->pic)
free(ctx->pic);
if (ctx)
free(ctx);
}
static void draw_slice(struct AVCodecContext *s,
uint8_t **src, int linesize,
int y, int width, int height){
sh_video_t * sh = s->opaque;
int stride[3];
int start=0, i;
int skip_stride= (s->width+15)>>4;
uint8_t *skip= &s->coded_frame->mbskip_table[(y>>4)*skip_stride];
int threshold= s->coded_frame->age;
stride[0]=linesize;
if(s->coded_frame->linesize[1]){
stride[1]= s->coded_frame->linesize[1];
stride[2]= s->coded_frame->linesize[2];
}else
stride[1]=stride[2]=stride[0]/2;
#if 0
if(s->pict_type!=B_TYPE){
for(i=0; i*16<width+16; i++){
if(i*16>=width || skip[i]>=threshold){
if(start==i) start++;
else{
uint8_t *src2[3]= {src[0] + start*16,
src[1] + start*8,
src[2] + start*8};
//printf("%2d-%2d x %d\n", start, i, y);
mpcodecs_draw_slice (sh,src2, stride, (i-start)*16, height, start*16, y);
start= i+1;
}
}
}
}else
#endif
mpcodecs_draw_slice (sh,src, stride, width, height, 0, y);
}
static int init_vo(sh_video_t *sh){
vd_ffmpeg_ctx *ctx = sh->context;
AVCodecContext *avctx = ctx->avctx;
if (avctx->aspect_ratio != ctx->last_aspect ||
avctx->width != sh->disp_w ||
avctx->height != sh->disp_h ||
!ctx->vo_inited)
{
mp_msg(MSGT_DECVIDEO, MSGL_V, "[ffmpeg] aspect_ratio: %f\n", avctx->aspect_ratio);
ctx->last_aspect = avctx->aspect_ratio;
// if(ctx->last_aspect>=0.01 && ctx->last_aspect<100)
sh->aspect = ctx->last_aspect;
sh->disp_w = avctx->width;
sh->disp_h = avctx->height;
ctx->vo_inited=1;
switch(avctx->pix_fmt){
case PIX_FMT_YUV410P: ctx->best_csp=IMGFMT_YVU9;break; //svq1
case PIX_FMT_YUV420P: ctx->best_csp=IMGFMT_YV12;break; //mpegs
case PIX_FMT_YUV422P: ctx->best_csp=IMGFMT_422P;break; //mjpeg / huffyuv
case PIX_FMT_YUV444P: ctx->best_csp=IMGFMT_444P;break; //photo jpeg
case PIX_FMT_YUV411P: ctx->best_csp=IMGFMT_411P;break; //dv ntsc
case PIX_FMT_YUV422: ctx->best_csp=IMGFMT_YUY2;break; //huffyuv perhaps in the future
case PIX_FMT_RGB24 : ctx->best_csp=IMGFMT_BGR24;break; //huffyuv
case PIX_FMT_RGBA32: ctx->best_csp=IMGFMT_BGR32;break; //huffyuv
default:
ctx->best_csp=0;
}
if (!mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h, ctx->best_csp))
return -1;
ctx->convert=(sh->codec->outfmt[sh->outfmtidx]==IMGFMT_YUY2
&& ctx->best_csp!=IMGFMT_YUY2); // yuv422p->yuy2 conversion
}
return 0;
}
static int get_buffer(AVCodecContext *avctx, AVFrame *pic){
sh_video_t * sh = avctx->opaque;
vd_ffmpeg_ctx *ctx = sh->context;
mp_image_t* mpi=NULL;
int flags= MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE;
int type= MP_IMGTYPE_IPB;
int width= avctx->width;
int height= avctx->height;
int align=15;
if(avctx->pix_fmt == PIX_FMT_YUV410P)
align=63; //yes seriously, its really needed (16x16 chroma blocks in SVQ1 -> 64x64)
if(init_vo(sh)<0){
printf("init_vo failed\n");
avctx->get_buffer= avcodec_default_get_buffer;
avctx->release_buffer= avcodec_default_release_buffer;
return avctx->get_buffer(avctx, pic);
}
if(!pic->reference)
flags|=(!avctx->hurry_up && ctx->do_slices) ?
MP_IMGFLAG_DRAW_CALLBACK:0;
else
flags|= MP_IMGFLAG_PRESERVE|MP_IMGFLAG_READABLE
| (ctx->do_slices ? MP_IMGFLAG_DRAW_CALLBACK : 0);
if(avctx->has_b_frames){
type= MP_IMGTYPE_IPB;
}else{
type= MP_IMGTYPE_IP;
}
mp_msg(MSGT_DECVIDEO,MSGL_DBG2, type== MP_IMGTYPE_IPB ? "using IPB\n" : "using IP\n");
mpi= mpcodecs_get_image(sh,type, flags,
(width+align)&(~align), (height+align)&(~align));
// ok, lets see what did we get:
if( mpi->flags&MP_IMGFLAG_DRAW_CALLBACK &&
!(mpi->flags&MP_IMGFLAG_DIRECT)){
// nice, filter/vo likes draw_callback :)
avctx->draw_horiz_band= draw_slice;
} else
avctx->draw_horiz_band= NULL;
pic->data[0]= mpi->planes[0];
pic->data[1]= mpi->planes[1];
pic->data[2]= mpi->planes[2];
#if 0
assert(mpi->width >= ((width +align)&(~align)));
assert(mpi->height >= ((height+align)&(~align)));
assert(mpi->stride[0] >= mpi->width);
if(mpi->imgfmt==IMGFMT_I420 || mpi->imgfmt==IMGFMT_YV12 || mpi->imgfmt==IMGFMT_IYUV){
const int y_size= mpi->stride[0] * (mpi->h-1) + mpi->w;
const int c_size= mpi->stride[1] * ((mpi->h>>1)-1) + (mpi->w>>1);
assert(mpi->planes[0] > mpi->planes[1] || mpi->planes[0] + y_size <= mpi->planes[1]);
assert(mpi->planes[0] > mpi->planes[2] || mpi->planes[0] + y_size <= mpi->planes[2]);
assert(mpi->planes[1] > mpi->planes[0] || mpi->planes[1] + c_size <= mpi->planes[0]);
assert(mpi->planes[1] > mpi->planes[2] || mpi->planes[1] + c_size <= mpi->planes[2]);
assert(mpi->planes[2] > mpi->planes[0] || mpi->planes[2] + c_size <= mpi->planes[0]);
assert(mpi->planes[2] > mpi->planes[1] || mpi->planes[2] + c_size <= mpi->planes[1]);
}
#endif
/* Note, some (many) codecs in libavcodec must have stride1==stride2 && no changes between frames
* lavc will check that and die with an error message, if its not true
*/
pic->linesize[0]= mpi->stride[0];
pic->linesize[1]= mpi->stride[1];
pic->linesize[2]= mpi->stride[2];
pic->opaque = mpi;
//printf("%X\n", (int)mpi->planes[0]);
#if 0
if(mpi->flags&MP_IMGFLAG_DIRECT)
printf("D");
else if(mpi->flags&MP_IMGFLAG_DRAW_CALLBACK)
printf("S");
else
printf(".");
#endif
if(pic->reference){
pic->age= ctx->ip_age[0];
ctx->ip_age[0]= ctx->ip_age[1]+1;
ctx->ip_age[1]= 1;
ctx->b_age++;
}else{
pic->age= ctx->b_age;
ctx->ip_age[0]++;
ctx->ip_age[1]++;
ctx->b_age=1;
}
#if LIBAVCODEC_BUILD >= 4644
pic->type= FF_BUFFER_TYPE_USER;
#endif
return 0;
}
static void release_buffer(struct AVCodecContext *avctx, AVFrame *pic){
int i;
#if LIBAVCODEC_BUILD >= 4644
assert(pic->type == FF_BUFFER_TYPE_USER);
#endif
for(i=0; i<4; i++){
pic->data[i]= NULL;
}
//printf("R%X %X\n", pic->linesize[0], pic->data[0]);
}
// copypaste from demux_real.c - it should match to get it working!
//FIXME put into some header
typedef struct dp_hdr_s {
uint32_t chunks; // number of chunks
uint32_t timestamp; // timestamp from packet header
uint32_t len; // length of actual data
uint32_t chunktab; // offset to chunk offset array
} dp_hdr_t;
// decode a frame
static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags){
int got_picture=0;
int ret;
vd_ffmpeg_ctx *ctx = sh->context;
AVFrame *pic= ctx->pic;
AVCodecContext *avctx = ctx->avctx;
mp_image_t* mpi=NULL;
int dr1= ctx->do_dr1;
if(len<=0) return NULL; // skipped frame
avctx->draw_horiz_band=NULL;
avctx->opaque=sh;
if(ctx->vo_inited && !ctx->convert && !(flags&3) && !dr1){
mpi=mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, MP_IMGFLAG_PRESERVE |
(ctx->do_slices?MP_IMGFLAG_DRAW_CALLBACK:0),
sh->disp_w, sh->disp_h);
if(mpi && mpi->flags&MP_IMGFLAG_DRAW_CALLBACK){
// vd core likes slices!
avctx->draw_horiz_band=draw_slice;
}
}
avctx->hurry_up=(flags&3)?((flags&2)?2:1):0;
// if(sh->ds->demuxer->type == DEMUXER_TYPE_REAL){
if( sh->format == mmioFOURCC('R', 'V', '1', '0')
|| sh->format == mmioFOURCC('R', 'V', '1', '3'))
if(sh->bih->biSize==sizeof(*sh->bih)+8){
int i;
dp_hdr_t *hdr= (dp_hdr_t*)data;
if(avctx->slice_offset==NULL)
avctx->slice_offset= malloc(sizeof(int)*1000);
// for(i=0; i<25; i++) printf("%02X ", ((uint8_t*)data)[i]);
avctx->slice_count= hdr->chunks+1;
for(i=0; i<avctx->slice_count; i++)
avctx->slice_offset[i]= ((uint32_t*)(data+hdr->chunktab))[2*i+1];
len=hdr->len;
data+= sizeof(dp_hdr_t);
}
ret = avcodec_decode_video(avctx, pic,
&got_picture, data, len);
if(ret<0) mp_msg(MSGT_DECVIDEO,MSGL_WARN, "Error while decoding frame!\n");
//printf("repeat: %d\n", pic->repeat_pict);
//-- vstats generation
#if LIBAVCODEC_BUILD >= 4643
while(lavc_param_vstats){ // always one time loop
static FILE *fvstats=NULL;
char filename[20];
static long long int all_len=0;
static int frame_number=0;
static double all_frametime=0.0;
AVFrame *pic= avctx->coded_frame;
double quality=0.0;
if(!fvstats) {
time_t today2;
struct tm *today;
today2 = time(NULL);
today = localtime(&today2);
sprintf(filename, "vstats_%02d%02d%02d.log", today->tm_hour,
today->tm_min, today->tm_sec);
fvstats = fopen(filename,"w");
if(!fvstats) {
perror("fopen");
lavc_param_vstats=0; // disable block
break;
/*exit(1);*/
}
}
// average MB quantizer
{
int x, y;
int w = (avctx->width+15) >> 4;
int h = (avctx->height+15) >> 4;
int8_t *q = pic->qscale_table;
for( y = 0; y < h; y++ ) {
for( x = 0; x < w; x++ )
quality += (double)*(q+x);
q += pic->qstride;
}
quality /= w * h;
}
all_len+=len;
all_frametime+=sh->frametime;
fprintf(fvstats, "frame= %5d q= %2.2f f_size= %6d s_size= %8.0fkB ",
++frame_number, quality, len, (double)all_len/1024);
fprintf(fvstats, "time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
all_frametime, (double)(len*8)/sh->frametime/1000.0,
(double)(all_len*8)/all_frametime/1000.0);
switch(pic->pict_type){
case FF_I_TYPE:
fprintf(fvstats, "type= I\n");
break;
case FF_P_TYPE:
fprintf(fvstats, "type= P\n");
break;
case FF_S_TYPE:
fprintf(fvstats, "type= S\n");
break;
case FF_B_TYPE:
fprintf(fvstats, "type= B\n");
break;
default:
fprintf(fvstats, "type= ? (%d)\n", pic->pict_type);
break;
}
ctx->qp_stat[(int)(quality+0.5)]++;
ctx->qp_sum += quality;
ctx->inv_qp_sum += 1.0/(double)quality;
break;
}
#endif
//--
if(!got_picture) return NULL; // skipped image
if(init_vo(sh)<0) return NULL;
if(dr1 && pic->opaque){
mpi= (mp_image_t*)pic->opaque;
}
if(!mpi && ctx->convert){
// do yuv422p -> yuy2 conversion:
mpi=mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
avctx->width, avctx->height);
if(!mpi) return NULL;
yuv422ptoyuy2(pic->data[0],pic->data[1],pic->data[2],
mpi->planes[0],avctx->width,avctx->height,
pic->linesize[0],pic->linesize[1],mpi->stride[0]);
return mpi;
}
if(!mpi)
mpi=mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, MP_IMGFLAG_PRESERVE,
avctx->width, avctx->height);
if(!mpi){ // temporary!
printf("couldn't allocate image for codec\n");
return NULL;
}
if(!dr1){
mpi->planes[0]=pic->data[0];
mpi->planes[1]=pic->data[1];
mpi->planes[2]=pic->data[2];
mpi->stride[0]=pic->linesize[0];
mpi->stride[1]=pic->linesize[1];
mpi->stride[2]=pic->linesize[2];
}
if(avctx->pix_fmt==PIX_FMT_YUV422P && mpi->chroma_y_shift==1){
// we have 422p but user wants 420p
mpi->stride[1]*=2;
mpi->stride[2]*=2;
}
/* to comfirm with newer lavc style */
mpi->qscale =pic->qscale_table;
mpi->qstride=pic->qstride;
mpi->pict_type=pic->pict_type;
return mpi;
}
#endif
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