Signed-off-by: Guo, Yejun <yejun....@intel.com>
---
libavcodec/libvpxenc.c | 150 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 150 insertions(+)
diff --git a/libavcodec/libvpxenc.c b/libavcodec/libvpxenc.c
index c823b8a..2984c7a 100644
--- a/libavcodec/libvpxenc.c
+++ b/libavcodec/libvpxenc.c
@@ -1057,6 +1057,153 @@ static int queue_frames(AVCodecContext *avctx, AVPacket
*pkt_out)
return size;
}
+static int vp8_encode_set_roi(AVCodecContext *avctx, const AVFrame *frame)
+{
+ /* range of vpx_roi_map_t.delta_q[i] is [-63, 63] */
+#define MAX_DELTA_Q 63
+
+ const AVRegionOfInterest *roi = NULL;
+ vpx_roi_map_t roi_map;
+ int ret = 0;
+ int nb_rois;
+ AVFrameSideData *sd = av_frame_get_side_data(frame,
AV_FRAME_DATA_REGIONS_OF_INTEREST);
+ VPxContext *ctx = avctx->priv_data;
+ vpx_active_map_t active_map = { 0 };
+ int max_segment_cnt = 4; /* VP8 ROI only support 4 segments. */
+ int segment_id = 0;
+
+ /* record the mapping from delta_q to "segment id + 1".
+ * delta_q is shift with MAX_DELTA_Q, and so the range is [0,
2*MAX_DELTA_Q].
+ * add 1 to segment id, so no mapping if the value of array element is
zero.
+ */
+ int segment_mapping[2 * MAX_DELTA_Q + 1] = { 0 };
+
+ /* segment id 0 in roi_map is reserved for the areas not covered by
AVRegionOfInterest.
+ * segment id 0 in roi_map is also for the areas with
AVRegionOfInterest.qoffset near 0.
+ */
+ segment_mapping[MAX_DELTA_Q] = segment_id + 1;
+ segment_id++;
+
+ active_map.rows = (frame->height + 15) / 16;
+ active_map.cols = (frame->width + 15) / 16;
+
+ if (!sd) {
+ /* For the case that some middle frames do not have ROI while other
frames have ROIs.
+ * Due to libvpx behavior, we have to reset VP8E_SET_ACTIVEMAP,
otherwise the previous
+ * ROIs continue working for frames without ROIs.
+ */
+ if (vpx_codec_control(&ctx->encoder, VP8E_SET_ACTIVEMAP, &active_map))
{
+ log_encoder_error(avctx, "Failed to set VP8E_SET_ACTIVEMAP codec
control.\n");
+ return AVERROR_INVALIDDATA;
+ }
+ return 0;
+ }
+
+ memset(&roi_map, 0, sizeof(roi_map));
+ roi_map.rows = active_map.rows;
+ roi_map.cols = active_map.cols;
+ roi_map.roi_map = av_mallocz(roi_map.rows * roi_map.cols);
+ if (!roi_map.roi_map) {
+ av_log(avctx, AV_LOG_ERROR, "roi_map alloc failed.\n");
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ active_map.active_map = av_malloc(active_map.rows * active_map.cols);
+ if (!active_map.active_map) {
+ av_log(avctx, AV_LOG_ERROR, "active_map alloc failed.\n");
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ /* set 1 to enable the corresponding element of vpx_roi_map_t.roi_map. */
+ memset(active_map.active_map, 1, active_map.rows * active_map.cols);
+
+ roi = (const AVRegionOfInterest*)sd->data;
+ if (!roi->self_size || sd->size % roi->self_size != 0) {
+ av_log(ctx, AV_LOG_ERROR, "Invalid AVRegionOfInterest.self_size.\n");
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+ nb_rois = sd->size / roi->self_size;
+
+ /* This list must be iterated from zero because regions are
+ * defined in order of decreasing importance. So discard less
+ * important areas if they exceed the segment count.
+ */
+ for (int i = 0; i < nb_rois; i++) {
+ int qoffset;
+ int mapping_index;
+
+ roi = (const AVRegionOfInterest*)(sd->data + roi->self_size * i);
+ if (roi->qoffset.den == 0) {
+ av_log(ctx, AV_LOG_ERROR, "AVRegionOfInterest.qoffset.den must not
be zero.\n");
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+
+ qoffset = (int)(roi->qoffset.num * 1.0f / roi->qoffset.den *
MAX_DELTA_Q);
+ qoffset = av_clip(qoffset, -MAX_DELTA_Q, MAX_DELTA_Q);
+
+ mapping_index = qoffset + MAX_DELTA_Q;
+ if (!segment_mapping[mapping_index]) {
+ if (segment_id > max_segment_cnt - 1) {
+ av_log(ctx, AV_LOG_WARNING,
+ "ROI only supports %d segments (and segment 0 is
reserved for non-ROIs), skipping this one.\n",
+ max_segment_cnt);
+ roi = (AVRegionOfInterest*)((char*)roi + roi->self_size);
+ continue;
+ }
+
+ segment_mapping[mapping_index] = segment_id + 1;
+ roi_map.delta_q[segment_id] = qoffset;
+ segment_id++;
+ }
+ }
+
+ /* This list must be iterated in reverse, so for the case that
+ * two regions overlapping, the more important area takes effect.
+ */
+ for (int i = nb_rois - 1; i >= 0; i--) {
+ int qoffset;
+ int mapping_value;
+ int starty, endy, startx, endx;
+
+ roi = (const AVRegionOfInterest*)(sd->data + roi->self_size * i);
+
+ starty = FFMIN(roi_map.rows, roi->top / 16);
+ endy = FFMIN(roi_map.rows, (roi->bottom + 15) / 16);
+ startx = FFMIN(roi_map.cols, roi->left / 16);
+ endx = FFMIN(roi_map.cols, (roi->right + 15) / 16);
+
+ qoffset = (int)(roi->qoffset.num * 1.0f / roi->qoffset.den *
MAX_DELTA_Q);
+ qoffset = av_clip(qoffset, -MAX_DELTA_Q, MAX_DELTA_Q);
+
+ mapping_value = segment_mapping[qoffset + MAX_DELTA_Q];
+ if (mapping_value) {
+ for (int y = starty; y < endy; y++)
+ for (int x = startx; x < endx; x++)
+ roi_map.roi_map[x + y * roi_map.cols] = mapping_value - 1;
+ }
+ }
+
+ if (vpx_codec_control(&ctx->encoder, VP8E_SET_ROI_MAP, &roi_map)) {
+ log_encoder_error(avctx, "Failed to set VP8E_SET_ROI_MAP codec
control.\n");
+ ret = AVERROR_INVALIDDATA;
+ goto fail;
+ }
+
+ if (vpx_codec_control(&ctx->encoder, VP8E_SET_ACTIVEMAP, &active_map)) {
+ log_encoder_error(avctx, "Failed to set VP8E_SET_ACTIVEMAP codec
control.\n");
+ ret = AVERROR_INVALIDDATA;
+ goto fail;
+ }
+
+fail:
+ av_freep(&active_map.active_map);
+ av_freep(&roi_map.roi_map);
+ return ret;
+}
+
static int vpx_encode(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *frame, int *got_packet)
{
@@ -1113,6 +1260,9 @@ static int vpx_encode(AVCodecContext *avctx, AVPacket
*pkt,
flags |= strtoul(en->value, NULL, 10);
}
}
+
+ if (avctx->codec_id == AV_CODEC_ID_VP8)
+ vp8_encode_set_roi(avctx, frame);
}
res = vpx_codec_encode(&ctx->encoder, rawimg, timestamp,
--
2.7.4
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