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avcodec/nvenc: support dynamic aspect ratio change

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If there is input like DVB-T streams it can change aspect ratio
on-the-fly, so nvenc should respect this change and change aspect ratio
in encoder.

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>
This commit is contained in:
Miroslav Slugeň 2017-02-12 19:53:58 +01:00 committed by Timo Rothenpieler
parent 7d4e1f7cfb
commit 952421cd20
1 changed files with 60 additions and 7 deletions
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67
libavcodec/nvenc.c
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@ -1112,6 +1112,20 @@ static av_cold int nvenc_setup_codec_config(AVCodecContext *avctx)
return 0;
}
static void compute_dar(AVCodecContext *avctx, int *dw, int *dh) {
int sw, sh;
sw = avctx->width;
sh = avctx->height;
if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
sw *= avctx->sample_aspect_ratio.num;
sh *= avctx->sample_aspect_ratio.den;
}
av_reduce(dw, dh, sw, sh, 1024 * 1024);
}
static av_cold int nvenc_setup_encoder(AVCodecContext *avctx)
{
NvencContext *ctx = avctx->priv_data;
@ -1148,13 +1162,7 @@ static av_cold int nvenc_setup_encoder(AVCodecContext *avctx)
ctx->encode_config.version = NV_ENC_CONFIG_VER;
dw = avctx->width;
dh = avctx->height;
if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
dw*= avctx->sample_aspect_ratio.num;
dh*= avctx->sample_aspect_ratio.den;
}
av_reduce(&dw, &dh, dw, dh, 1024 * 1024);
compute_dar(avctx, &dw, &dh);
ctx->init_encode_params.darHeight = dh;
ctx->init_encode_params.darWidth = dw;
@ -1927,6 +1935,49 @@ static int output_ready(AVCodecContext *avctx, int flush)
return (nb_ready > 0) && (nb_ready + nb_pending >= ctx->async_depth);
}
static int reconfig_encoder(AVCodecContext *avctx, const AVFrame *frame)
{
NvencContext *ctx = avctx->priv_data;
NV_ENCODE_API_FUNCTION_LIST *p_nvenc = &ctx->nvenc_dload_funcs.nvenc_funcs;
NVENCSTATUS ret;
NV_ENC_RECONFIGURE_PARAMS params = { 0 };
int needs_reconfig = 0;
int needs_encode_config = 0;
int dw, dh;
params.version = NV_ENC_RECONFIGURE_PARAMS_VER;
params.reInitEncodeParams = ctx->init_encode_params;
compute_dar(avctx, &dw, &dh);
if (dw != ctx->init_encode_params.darWidth || dh != ctx->init_encode_params.darHeight) {
av_log(avctx, AV_LOG_VERBOSE,
"aspect ratio change (DAR): %d:%d -> %d:%d\n",
ctx->init_encode_params.darWidth,
ctx->init_encode_params.darHeight, dw, dh);
params.reInitEncodeParams.darHeight = dh;
params.reInitEncodeParams.darWidth = dw;
needs_reconfig = 1;
}
if (!needs_encode_config)
params.reInitEncodeParams.encodeConfig = NULL;
if (needs_reconfig) {
ret = p_nvenc->nvEncReconfigureEncoder(ctx->nvencoder, &params);
if (ret != NV_ENC_SUCCESS) {
nvenc_print_error(avctx, ret, "failed to reconfigure nvenc");
} else {
ctx->init_encode_params.darHeight = dh;
ctx->init_encode_params.darWidth = dw;
}
}
return 0;
}
int ff_nvenc_send_frame(AVCodecContext *avctx, const AVFrame *frame)
{
NVENCSTATUS nv_status;
@ -1947,6 +1998,8 @@ int ff_nvenc_send_frame(AVCodecContext *avctx, const AVFrame *frame)
return AVERROR_EOF;
if (frame) {
reconfig_encoder(avctx, frame);
in_surf = get_free_frame(ctx);
if (!in_surf)
return AVERROR(EAGAIN);