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mpegvideo_enc: use the new encoding API for b_strategy=2

This commit is contained in:
Anton Khirnov 2016-09-21 20:22:14 +02:00
parent f03f78bc1c
commit 68811a41c7
1 changed files with 49 additions and 39 deletions
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72
libavcodec/mpegvideo_enc.c
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@ -1245,30 +1245,38 @@ static int skip_check(MpegEncContext *s, Picture *p, Picture *ref)
static int encode_frame(AVCodecContext *c, AVFrame *frame)
{
AVPacket pkt = { 0 };
int ret, got_output;
int ret;
int size = 0;
av_init_packet(&pkt);
ret = avcodec_encode_video2(c, &pkt, frame, &got_output);
ret = avcodec_send_frame(c, frame);
if (ret < 0)
return ret;
ret = pkt.size;
do {
ret = avcodec_receive_packet(c, &pkt);
if (ret >= 0) {
size += pkt.size;
av_packet_unref(&pkt);
} else if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
return ret;
} while (ret >= 0);
return size;
}
static int estimate_best_b_count(MpegEncContext *s)
{
const AVCodec *codec = avcodec_find_encoder(s->avctx->codec_id);
AVCodecContext *c = avcodec_alloc_context3(NULL);
const int scale = s->brd_scale;
int width = s->width >> scale;
int height = s->height >> scale;
int i, j, out_size, p_lambda, b_lambda, lambda2;
int64_t best_rd = INT64_MAX;
int best_b_count = -1;
int ret = 0;
if (!c)
return AVERROR(ENOMEM);
assert(scale >= 0 && scale <= 3);
//emms_c();
@ -1281,21 +1289,6 @@ static int estimate_best_b_count(MpegEncContext *s)
lambda2 = (b_lambda * b_lambda + (1 << FF_LAMBDA_SHIFT) / 2) >>
FF_LAMBDA_SHIFT;
c->width = s->width >> scale;
c->height = s->height >> scale;
c->flags = AV_CODEC_FLAG_QSCALE | AV_CODEC_FLAG_PSNR;
c->flags |= s->avctx->flags & AV_CODEC_FLAG_QPEL;
c->mb_decision = s->avctx->mb_decision;
c->me_cmp = s->avctx->me_cmp;
c->mb_cmp = s->avctx->mb_cmp;
c->me_sub_cmp = s->avctx->me_sub_cmp;
c->pix_fmt = AV_PIX_FMT_YUV420P;
c->time_base = s->avctx->time_base;
c->max_b_frames = s->max_b_frames;
if (avcodec_open2(c, codec, NULL) < 0)
return -1;
for (i = 0; i < s->max_b_frames + 2; i++) {
Picture pre_input, *pre_input_ptr = i ? s->input_picture[i - 1] :
s->next_picture_ptr;
@ -1313,27 +1306,46 @@ static int estimate_best_b_count(MpegEncContext *s)
s->tmp_frames[i]->linesize[0],
pre_input.f->data[0],
pre_input.f->linesize[0],
c->width, c->height);
width, height);
s->mpvencdsp.shrink[scale](s->tmp_frames[i]->data[1],
s->tmp_frames[i]->linesize[1],
pre_input.f->data[1],
pre_input.f->linesize[1],
c->width >> 1, c->height >> 1);
width >> 1, height >> 1);
s->mpvencdsp.shrink[scale](s->tmp_frames[i]->data[2],
s->tmp_frames[i]->linesize[2],
pre_input.f->data[2],
pre_input.f->linesize[2],
c->width >> 1, c->height >> 1);
width >> 1, height >> 1);
}
}
for (j = 0; j < s->max_b_frames + 1; j++) {
AVCodecContext *c;
int64_t rd = 0;
if (!s->input_picture[j])
break;
c->error[0] = c->error[1] = c->error[2] = 0;
c = avcodec_alloc_context3(NULL);
if (!c)
return AVERROR(ENOMEM);
c->width = width;
c->height = height;
c->flags = AV_CODEC_FLAG_QSCALE | AV_CODEC_FLAG_PSNR;
c->flags |= s->avctx->flags & AV_CODEC_FLAG_QPEL;
c->mb_decision = s->avctx->mb_decision;
c->me_cmp = s->avctx->me_cmp;
c->mb_cmp = s->avctx->mb_cmp;
c->me_sub_cmp = s->avctx->me_sub_cmp;
c->pix_fmt = AV_PIX_FMT_YUV420P;
c->time_base = s->avctx->time_base;
c->max_b_frames = s->max_b_frames;
ret = avcodec_open2(c, codec, NULL);
if (ret < 0)
goto fail;
s->tmp_frames[0]->pict_type = AV_PICTURE_TYPE_I;
s->tmp_frames[0]->quality = 1 * FF_QP2LAMBDA;
@ -1363,14 +1375,12 @@ static int estimate_best_b_count(MpegEncContext *s)
}
/* get the delayed frames */
while (out_size) {
out_size = encode_frame(c, NULL);
if (out_size < 0) {
ret = out_size;
goto fail;
}
rd += (out_size * lambda2) >> (FF_LAMBDA_SHIFT - 3);
}
rd += c->error[0] + c->error[1] + c->error[2];
@ -1378,16 +1388,16 @@ static int estimate_best_b_count(MpegEncContext *s)
best_rd = rd;
best_b_count = j;
}
}
avcodec_free_context(&c);
return best_b_count;
fail:
avcodec_free_context(&c);
if (ret < 0)
return ret;
}
return best_b_count;
}
static int select_input_picture(MpegEncContext *s)
{
int i, ret;