| /* |
| * Copyright (c) 2016, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| #include <assert.h> |
| #include <stdlib.h> |
| |
| #include "config/aom_config.h" |
| |
| #include "aom_scale/yv12config.h" |
| #include "av1/common/common.h" |
| #include "av1/encoder/encoder.h" |
| #include "av1/encoder/extend.h" |
| #include "av1/encoder/lookahead.h" |
| |
| /* Return the buffer at the given absolute index and increment the index */ |
| static struct lookahead_entry *pop(struct lookahead_ctx *ctx, int *idx) { |
| int index = *idx; |
| struct lookahead_entry *buf = ctx->buf + index; |
| |
| assert(index < ctx->max_sz); |
| if (++index >= ctx->max_sz) index -= ctx->max_sz; |
| *idx = index; |
| return buf; |
| } |
| |
| void av1_lookahead_destroy(struct lookahead_ctx *ctx) { |
| if (ctx) { |
| if (ctx->buf) { |
| int i; |
| |
| for (i = 0; i < ctx->max_sz; i++) aom_free_frame_buffer(&ctx->buf[i].img); |
| free(ctx->buf); |
| } |
| free(ctx); |
| } |
| } |
| |
| struct lookahead_ctx *av1_lookahead_init( |
| unsigned int width, unsigned int height, unsigned int subsampling_x, |
| unsigned int subsampling_y, int use_highbitdepth, unsigned int depth, |
| const int border_in_pixels, int byte_alignment, int num_lap_buffers, |
| bool is_all_intra, int num_pyramid_levels) { |
| int lag_in_frames = AOMMAX(1, depth); |
| |
| // For all-intra frame encoding, previous source frames are not required. |
| // Hence max_pre_frames is set to 0 in this case. As previous source frames |
| // are accessed using a negative index to av1_lookahead_peek(), setting |
| // max_pre_frames to 0 will cause av1_lookahead_peek() to return NULL for a |
| // negative index. |
| const uint8_t max_pre_frames = is_all_intra ? 0 : MAX_PRE_FRAMES; |
| |
| // Add the lags to depth and clamp |
| depth += num_lap_buffers; |
| depth = clamp(depth, 1, MAX_TOTAL_BUFFERS); |
| |
| // Allocate memory to keep previous source frames available. |
| depth += max_pre_frames; |
| |
| // Allocate the lookahead structures |
| struct lookahead_ctx *ctx = calloc(1, sizeof(*ctx)); |
| if (ctx) { |
| unsigned int i; |
| ctx->max_sz = depth; |
| ctx->push_frame_count = 0; |
| ctx->max_pre_frames = max_pre_frames; |
| ctx->read_ctxs[ENCODE_STAGE].pop_sz = ctx->max_sz - ctx->max_pre_frames; |
| ctx->read_ctxs[ENCODE_STAGE].valid = 1; |
| if (num_lap_buffers) { |
| ctx->read_ctxs[LAP_STAGE].pop_sz = lag_in_frames; |
| ctx->read_ctxs[LAP_STAGE].valid = 1; |
| } |
| ctx->buf = calloc(depth, sizeof(*ctx->buf)); |
| if (!ctx->buf) goto fail; |
| for (i = 0; i < depth; i++) { |
| if (aom_realloc_frame_buffer( |
| &ctx->buf[i].img, width, height, subsampling_x, subsampling_y, |
| use_highbitdepth, border_in_pixels, byte_alignment, NULL, NULL, |
| NULL, num_pyramid_levels, 0)) { |
| goto fail; |
| } |
| } |
| } |
| return ctx; |
| fail: |
| av1_lookahead_destroy(ctx); |
| return NULL; |
| } |
| |
| int av1_lookahead_full(const struct lookahead_ctx *ctx) { |
| // TODO(angiebird): Test this function. |
| return ctx->read_ctxs[ENCODE_STAGE].sz >= ctx->read_ctxs[ENCODE_STAGE].pop_sz; |
| } |
| |
| int av1_lookahead_push(struct lookahead_ctx *ctx, const YV12_BUFFER_CONFIG *src, |
| int64_t ts_start, int64_t ts_end, int use_highbitdepth, |
| int num_pyramid_levels, aom_enc_frame_flags_t flags) { |
| int width = src->y_crop_width; |
| int height = src->y_crop_height; |
| int uv_width = src->uv_crop_width; |
| int uv_height = src->uv_crop_height; |
| int subsampling_x = src->subsampling_x; |
| int subsampling_y = src->subsampling_y; |
| int larger_dimensions, new_dimensions; |
| |
| assert(ctx->read_ctxs[ENCODE_STAGE].valid == 1); |
| if (ctx->read_ctxs[ENCODE_STAGE].sz + ctx->max_pre_frames > ctx->max_sz) |
| return 1; |
| |
| ctx->read_ctxs[ENCODE_STAGE].sz++; |
| if (ctx->read_ctxs[LAP_STAGE].valid) { |
| ctx->read_ctxs[LAP_STAGE].sz++; |
| } |
| |
| struct lookahead_entry *buf = pop(ctx, &ctx->write_idx); |
| |
| new_dimensions = width != buf->img.y_crop_width || |
| height != buf->img.y_crop_height || |
| uv_width != buf->img.uv_crop_width || |
| uv_height != buf->img.uv_crop_height; |
| larger_dimensions = |
| width > buf->img.y_crop_width || height > buf->img.y_crop_height || |
| uv_width > buf->img.uv_crop_width || uv_height > buf->img.uv_crop_height; |
| assert(!larger_dimensions || new_dimensions); |
| |
| if (larger_dimensions) { |
| YV12_BUFFER_CONFIG new_img; |
| memset(&new_img, 0, sizeof(new_img)); |
| if (aom_alloc_frame_buffer(&new_img, width, height, subsampling_x, |
| subsampling_y, use_highbitdepth, |
| AOM_BORDER_IN_PIXELS, 0, num_pyramid_levels, 0)) |
| return 1; |
| aom_free_frame_buffer(&buf->img); |
| buf->img = new_img; |
| } else if (new_dimensions) { |
| buf->img.y_width = src->y_width; |
| buf->img.y_height = src->y_height; |
| buf->img.uv_width = src->uv_width; |
| buf->img.uv_height = src->uv_height; |
| buf->img.y_crop_width = src->y_crop_width; |
| buf->img.y_crop_height = src->y_crop_height; |
| buf->img.uv_crop_width = src->uv_crop_width; |
| buf->img.uv_crop_height = src->uv_crop_height; |
| buf->img.subsampling_x = src->subsampling_x; |
| buf->img.subsampling_y = src->subsampling_y; |
| } |
| av1_copy_and_extend_frame(src, &buf->img); |
| |
| buf->ts_start = ts_start; |
| buf->ts_end = ts_end; |
| buf->display_idx = ctx->push_frame_count; |
| buf->flags = flags; |
| ++ctx->push_frame_count; |
| aom_remove_metadata_from_frame_buffer(&buf->img); |
| if (src->metadata && |
| aom_copy_metadata_to_frame_buffer(&buf->img, src->metadata)) { |
| return 1; |
| } |
| return 0; |
| } |
| |
| struct lookahead_entry *av1_lookahead_pop(struct lookahead_ctx *ctx, int drain, |
| COMPRESSOR_STAGE stage) { |
| struct lookahead_entry *buf = NULL; |
| if (ctx) { |
| struct read_ctx *read_ctx = &ctx->read_ctxs[stage]; |
| assert(read_ctx->valid == 1); |
| if (read_ctx->sz && (drain || read_ctx->sz == read_ctx->pop_sz)) { |
| buf = pop(ctx, &read_ctx->read_idx); |
| read_ctx->sz--; |
| } |
| } |
| return buf; |
| } |
| |
| struct lookahead_entry *av1_lookahead_peek(struct lookahead_ctx *ctx, int index, |
| COMPRESSOR_STAGE stage) { |
| struct lookahead_entry *buf = NULL; |
| if (ctx == NULL) { |
| return buf; |
| } |
| |
| struct read_ctx *read_ctx = &ctx->read_ctxs[stage]; |
| assert(read_ctx->valid == 1); |
| if (index >= 0) { |
| // Forward peek |
| if (index < read_ctx->sz) { |
| index += read_ctx->read_idx; |
| if (index >= ctx->max_sz) index -= ctx->max_sz; |
| buf = ctx->buf + index; |
| } |
| } else if (index < 0) { |
| // Backward peek |
| if (-index <= ctx->max_pre_frames) { |
| index += (int)(read_ctx->read_idx); |
| if (index < 0) index += (int)(ctx->max_sz); |
| buf = ctx->buf + index; |
| } |
| } |
| |
| return buf; |
| } |
| |
| unsigned int av1_lookahead_depth(struct lookahead_ctx *ctx, |
| COMPRESSOR_STAGE stage) { |
| assert(ctx != NULL); |
| |
| struct read_ctx *read_ctx = &ctx->read_ctxs[stage]; |
| assert(read_ctx->valid == 1); |
| return read_ctx->sz; |
| } |
| |
| int av1_lookahead_pop_sz(struct lookahead_ctx *ctx, COMPRESSOR_STAGE stage) { |
| assert(ctx != NULL); |
| |
| struct read_ctx *read_ctx = &ctx->read_ctxs[stage]; |
| assert(read_ctx->valid == 1); |
| return read_ctx->pop_sz; |
| } |