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support downscaling frames for dynamic b frame decission 

Originally committed as revision 4776 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-12-25 18:34:02 +00:00
parent c9ab8df88a
commit e8501c93b5
3 changed files with 11 additions and 2 deletions
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7
libavcodec/avcodec.h
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@ -1869,6 +1869,13 @@ typedef struct AVCodecContext {
* - decoding: unused
*/
int bidir_refine;
/**
*
* - encoding: set by user.
* - decoding: unused
*/
int brd_scale;
} AVCodecContext;
/**

5
libavcodec/mpegvideo.c
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@ -2145,9 +2145,9 @@ static int estimate_best_b_count(MpegEncContext *s){
AVCodec *codec= avcodec_find_encoder(s->avctx->codec_id);
AVCodecContext *c= avcodec_alloc_context();
AVFrame input[FF_MAX_B_FRAMES+2];
const int scale= 0;
const int scale= s->avctx->brd_scale;
int i, j, out_size;
int outbuf_size= (s->width * s->height) >> (2*scale); //FIXME
int outbuf_size= s->width * s->height; //FIXME
uint8_t *outbuf= av_malloc(outbuf_size);
ImgReSampleContext *resample;
int64_t best_rd= INT64_MAX;
@ -2198,6 +2198,7 @@ static int estimate_best_b_count(MpegEncContext *s){
input[0].pict_type= I_TYPE;
input[0].quality= 2 * FF_QP2LAMBDA;
out_size = avcodec_encode_video(c, outbuf, outbuf_size, &input[0]);
rd += (out_size * lambda2) >> FF_LAMBDA_SHIFT;
for(i=0; i<s->max_b_frames+1; i++){
int is_p= i % (j+1) == j || i==s->max_b_frames;

1
libavcodec/utils.c
View File

@ -708,6 +708,7 @@ static AVOption options[]={
{"mb_lmax", NULL, OFFSET(mb_lmax), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
{"me_penalty_compensation", NULL, OFFSET(me_penalty_compensation), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
{"bidir_refine", NULL, OFFSET(bidir_refine), FF_OPT_TYPE_INT, DEFAULT, 0, 4, V|E},
{"brd_scale", NULL, OFFSET(brd_scale), FF_OPT_TYPE_INT, DEFAULT, 0, 10, V|E},
{NULL},
};