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4ccc506a5c
This is the reference implementation for the Alliance for Open Media's av1 video code. The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36. MozReview-Commit-ID: 5PFTLbBDRrb --HG-- extra : rebase_source : a51578e072e47ac03b422d10d9b279a3de5fc216
115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AV1_ENCODER_LOOKAHEAD_H_
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#define AV1_ENCODER_LOOKAHEAD_H_
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#include "aom_scale/yv12config.h"
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#include "aom/aom_integer.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define MAX_LAG_BUFFERS 25
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struct lookahead_entry {
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YV12_BUFFER_CONFIG img;
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int64_t ts_start;
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int64_t ts_end;
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aom_enc_frame_flags_t flags;
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};
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// The max of past frames we want to keep in the queue.
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#define MAX_PRE_FRAMES 1
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struct lookahead_ctx {
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int max_sz; /* Absolute size of the queue */
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int sz; /* Number of buffers currently in the queue */
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int read_idx; /* Read index */
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int write_idx; /* Write index */
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struct lookahead_entry *buf; /* Buffer list */
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};
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/**\brief Initializes the lookahead stage
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*
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* The lookahead stage is a queue of frame buffers on which some analysis
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* may be done when buffers are enqueued.
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*/
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struct lookahead_ctx *av1_lookahead_init(unsigned int width,
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unsigned int height,
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unsigned int subsampling_x,
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unsigned int subsampling_y,
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#if CONFIG_HIGHBITDEPTH
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int use_highbitdepth,
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#endif
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unsigned int depth);
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/**\brief Destroys the lookahead stage
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*/
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void av1_lookahead_destroy(struct lookahead_ctx *ctx);
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/**\brief Enqueue a source buffer
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*
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* This function will copy the source image into a new framebuffer with
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* the expected stride/border.
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*
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* If active_map is non-NULL and there is only one frame in the queue, then copy
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* only active macroblocks.
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*
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* \param[in] ctx Pointer to the lookahead context
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* \param[in] src Pointer to the image to enqueue
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* \param[in] ts_start Timestamp for the start of this frame
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* \param[in] ts_end Timestamp for the end of this frame
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* \param[in] flags Flags set on this frame
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* \param[in] active_map Map that specifies which macroblock is active
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*/
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int av1_lookahead_push(struct lookahead_ctx *ctx, YV12_BUFFER_CONFIG *src,
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int64_t ts_start, int64_t ts_end,
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#if CONFIG_HIGHBITDEPTH
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int use_highbitdepth,
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#endif
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aom_enc_frame_flags_t flags);
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/**\brief Get the next source buffer to encode
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*
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*
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* \param[in] ctx Pointer to the lookahead context
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* \param[in] drain Flag indicating the buffer should be drained
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* (return a buffer regardless of the current queue depth)
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*
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* \retval NULL, if drain set and queue is empty
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* \retval NULL, if drain not set and queue not of the configured depth
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*/
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struct lookahead_entry *av1_lookahead_pop(struct lookahead_ctx *ctx, int drain);
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/**\brief Get a future source buffer to encode
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*
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* \param[in] ctx Pointer to the lookahead context
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* \param[in] index Index of the frame to be returned, 0 == next frame
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*
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* \retval NULL, if no buffer exists at the specified index
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*/
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struct lookahead_entry *av1_lookahead_peek(struct lookahead_ctx *ctx,
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int index);
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/**\brief Get the number of frames currently in the lookahead queue
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*
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* \param[in] ctx Pointer to the lookahead context
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*/
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unsigned int av1_lookahead_depth(struct lookahead_ctx *ctx);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // AV1_ENCODER_LOOKAHEAD_H_
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