diff options
Diffstat (limited to 'vp8/encoder/lookahead.c')
| -rw-r--r-- | vp8/encoder/lookahead.c | 57 |
1 files changed, 55 insertions, 2 deletions
diff --git a/vp8/encoder/lookahead.c b/vp8/encoder/lookahead.c index d7f85cba1..b92e82bdf 100644 --- a/vp8/encoder/lookahead.c +++ b/vp8/encoder/lookahead.c @@ -102,15 +102,68 @@ vp8_lookahead_push(struct lookahead_ctx *ctx, YV12_BUFFER_CONFIG *src, int64_t ts_start, int64_t ts_end, - unsigned int flags) + unsigned int flags, + unsigned char *active_map) { struct lookahead_entry* buf; + int row, col, active_end; + int mb_rows = (src->y_height + 15) >> 4; + int mb_cols = (src->y_width + 15) >> 4; if(ctx->sz + 1 > ctx->max_sz) return 1; ctx->sz++; buf = pop(ctx, &ctx->write_idx); - vp8_copy_and_extend_frame(src, &buf->img); + + // Only do this partial copy if the following conditions are all met: + // 1. Lookahead queue has has size of 1. + // 2. Active map is provided. + // 3. This is not a key frame, golden nor altref frame. + if (ctx->max_sz == 1 && active_map && !flags) + { + for (row = 0; row < mb_rows; ++row) + { + col = 0; + + while (1) + { + // Find the first active macroblock in this row. + for (; col < mb_cols; ++col) + { + if (active_map[col]) + break; + } + + // No more active macroblock in this row. + if (col == mb_cols) + break; + + // Find the end of active region in this row. + active_end = col; + + for (; active_end < mb_cols; ++active_end) + { + if (!active_map[active_end]) + break; + } + + // Only copy this active region. + vp8_copy_and_extend_frame_with_rect(src, &buf->img, + row << 4, + col << 4, 16, + (active_end - col) << 4); + + // Start again from the end of this active region. + col = active_end; + } + + active_map += mb_cols; + } + } + else + { + vp8_copy_and_extend_frame(src, &buf->img); + } buf->ts_start = ts_start; buf->ts_end = ts_end; buf->flags = flags; |