diff options
author | Guo, Yejun <yejun.guo@intel.com> | 2019-01-10 11:54:30 +0300 |
---|---|---|
committer | Derek Buitenhuis <derek.buitenhuis@gmail.com> | 2019-01-18 00:47:52 +0300 |
commit | aceb9131c16918164279cf0f8e1b5384610e3245 (patch) | |
tree | 589d1b0f5cb818d4f4315856abb4c81e417d66dd /libavcodec/libx264.c | |
parent | 1ef4828276e4c568a13b4c57c08aa75470adec9f (diff) |
avcodec/libx264: add support for ROI-based encoding
This patch just enables the path from ffmpeg to libx264,
the more encoders can be added later.
Signed-off-by: Guo, Yejun <yejun.guo@intel.com>
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Diffstat (limited to 'libavcodec/libx264.c')
-rw-r--r-- | libavcodec/libx264.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c index a68d0a7f61..a3493f393d 100644 --- a/libavcodec/libx264.c +++ b/libavcodec/libx264.c @@ -40,6 +40,10 @@ #include <stdlib.h> #include <string.h> +// from x264.h, for quant_offsets, Macroblocks are 16x16 +// blocks of pixels (with respect to the luma plane) +#define MB_SIZE 16 + typedef struct X264Context { AVClass *class; x264_param_t params; @@ -282,6 +286,7 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, x264_picture_t pic_out = {0}; int pict_type; int64_t *out_opaque; + AVFrameSideData *sd; x264_picture_init( &x4->pic ); x4->pic.img.i_csp = x4->params.i_csp; @@ -345,6 +350,63 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, } } } + + sd = av_frame_get_side_data(frame, AV_FRAME_DATA_REGIONS_OF_INTEREST); + if (sd) { + if (x4->params.rc.i_aq_mode == X264_AQ_NONE) { + av_log(ctx, AV_LOG_WARNING, "Adaptive quantization must be enabled to use ROI encoding, skipping ROI.\n"); + } else { + if (frame->interlaced_frame == 0) { + int mbx = (frame->width + MB_SIZE - 1) / MB_SIZE; + int mby = (frame->height + MB_SIZE - 1) / MB_SIZE; + int nb_rois; + AVRegionOfInterest* roi; + float* qoffsets; + qoffsets = av_mallocz_array(mbx * mby, sizeof(*qoffsets)); + if (!qoffsets) + return AVERROR(ENOMEM); + + nb_rois = sd->size / sizeof(AVRegionOfInterest); + roi = (AVRegionOfInterest*)sd->data; + for (int count = 0; count < nb_rois; count++) { + int starty = FFMIN(mby, roi->top / MB_SIZE); + int endy = FFMIN(mby, (roi->bottom + MB_SIZE - 1)/ MB_SIZE); + int startx = FFMIN(mbx, roi->left / MB_SIZE); + int endx = FFMIN(mbx, (roi->right + MB_SIZE - 1)/ MB_SIZE); + float qoffset; + + if (roi->qoffset.den == 0) { + av_free(qoffsets); + av_log(ctx, AV_LOG_ERROR, "AVRegionOfInterest.qoffset.den should not be zero.\n"); + return AVERROR(EINVAL); + } + qoffset = roi->qoffset.num * 1.0f / roi->qoffset.den; + qoffset = av_clipf(qoffset, -1.0f, 1.0f); + + // 25 is a number that I think it is a possible proper scale value. + qoffset = qoffset * 25; + + for (int y = starty; y < endy; y++) { + for (int x = startx; x < endx; x++) { + qoffsets[x + y*mbx] = qoffset; + } + } + + if (roi->self_size == 0) { + av_free(qoffsets); + av_log(ctx, AV_LOG_ERROR, "AVRegionOfInterest.self_size should be set to sizeof(AVRegionOfInterest).\n"); + return AVERROR(EINVAL); + } + roi = (AVRegionOfInterest*)((char*)roi + roi->self_size); + } + + x4->pic.prop.quant_offsets = qoffsets; + x4->pic.prop.quant_offsets_free = av_free; + } else { + av_log(ctx, AV_LOG_WARNING, "interlaced_frame not supported for ROI encoding yet, skipping ROI.\n"); + } + } + } } do { |