138 lines
4.8 KiB
C
138 lines
4.8 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
/*!\file
|
|
* \brief Describes look ahead buffer operations.
|
|
*/
|
|
#ifndef AOM_AV1_ENCODER_LOOKAHEAD_H_
|
|
#define AOM_AV1_ENCODER_LOOKAHEAD_H_
|
|
|
|
#include <stdbool.h>
|
|
|
|
#include "aom_scale/yv12config.h"
|
|
#include "aom/aom_integer.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*!\cond */
|
|
#define MAX_LAG_BUFFERS 48
|
|
#define MAX_LAP_BUFFERS 48
|
|
#define MAX_TOTAL_BUFFERS (MAX_LAG_BUFFERS + MAX_LAP_BUFFERS)
|
|
#define LAP_LAG_IN_FRAMES 17
|
|
|
|
struct lookahead_entry {
|
|
YV12_BUFFER_CONFIG img;
|
|
int64_t ts_start;
|
|
int64_t ts_end;
|
|
int display_idx;
|
|
aom_enc_frame_flags_t flags;
|
|
};
|
|
|
|
// The max of past frames we want to keep in the queue.
|
|
#define MAX_PRE_FRAMES 1
|
|
|
|
enum { ENCODE_STAGE, LAP_STAGE, MAX_STAGES } UENUM1BYTE(COMPRESSOR_STAGE);
|
|
|
|
struct read_ctx {
|
|
int sz; /* Number of buffers currently in the queue */
|
|
int read_idx; /* Read index */
|
|
int pop_sz; /* Size to check for pop condition */
|
|
int valid; /* Is this ctx valid? */
|
|
};
|
|
|
|
struct lookahead_ctx {
|
|
int max_sz; /* Absolute size of the queue */
|
|
int write_idx; /* Write index */
|
|
struct read_ctx read_ctxs[MAX_STAGES]; /* Read context */
|
|
struct lookahead_entry *buf; /* Buffer list */
|
|
int push_frame_count; /* Number of frames that have been pushed in the queue*/
|
|
uint8_t
|
|
max_pre_frames; /* Maximum number of past frames allowed in the queue */
|
|
};
|
|
/*!\endcond */
|
|
|
|
/**\brief Initializes the lookahead stage
|
|
*
|
|
* The lookahead stage is a queue of frame buffers on which some analysis
|
|
* may be done when buffers are enqueued.
|
|
*/
|
|
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, bool alloc_pyramid);
|
|
|
|
/**\brief Destroys the lookahead stage
|
|
*/
|
|
void av1_lookahead_destroy(struct lookahead_ctx *ctx);
|
|
|
|
/**\brief Check if lookahead buffer is full
|
|
*/
|
|
int av1_lookahead_full(const struct lookahead_ctx *ctx);
|
|
|
|
/**\brief Enqueue a source buffer
|
|
*
|
|
* This function will copy the source image into a new framebuffer with
|
|
* the expected stride/border.
|
|
*
|
|
* \param[in] ctx Pointer to the lookahead context
|
|
* \param[in] src Pointer to the image to enqueue
|
|
* \param[in] ts_start Timestamp for the start of this frame
|
|
* \param[in] ts_end Timestamp for the end of this frame
|
|
* \param[in] use_highbitdepth Tell if HBD is used
|
|
* \param[in] alloc_pyramid Whether to allocate a downsampling pyramid
|
|
* for each frame buffer
|
|
* \param[in] flags Flags set on this frame
|
|
*/
|
|
int av1_lookahead_push(struct lookahead_ctx *ctx, const YV12_BUFFER_CONFIG *src,
|
|
int64_t ts_start, int64_t ts_end, int use_highbitdepth,
|
|
bool alloc_pyramid, aom_enc_frame_flags_t flags);
|
|
|
|
/**\brief Get the next source buffer to encode
|
|
*
|
|
* \param[in] ctx Pointer to the lookahead context
|
|
* \param[in] drain Flag indicating the buffer should be drained
|
|
* (return a buffer regardless of the current queue depth)
|
|
* \param[in] stage Encoder stage
|
|
*
|
|
* \retval Return NULL, if drain set and queue is empty, or if drain not set and
|
|
* queue not of the configured depth.
|
|
*/
|
|
struct lookahead_entry *av1_lookahead_pop(struct lookahead_ctx *ctx, int drain,
|
|
COMPRESSOR_STAGE stage);
|
|
|
|
/**\brief Get a future source buffer to encode
|
|
*
|
|
* \param[in] ctx Pointer to the lookahead context
|
|
* \param[in] index Index of the frame to be returned, 0 == next frame
|
|
* \param[in] stage Encoder stage
|
|
*
|
|
* \retval Return NULL, if no buffer exists at the specified index
|
|
*/
|
|
struct lookahead_entry *av1_lookahead_peek(struct lookahead_ctx *ctx, int index,
|
|
COMPRESSOR_STAGE stage);
|
|
|
|
/**\brief Get the number of frames currently in the lookahead queue
|
|
*/
|
|
unsigned int av1_lookahead_depth(struct lookahead_ctx *ctx,
|
|
COMPRESSOR_STAGE stage);
|
|
|
|
/**\brief Get pop_sz value
|
|
*/
|
|
int av1_lookahead_pop_sz(struct lookahead_ctx *ctx, COMPRESSOR_STAGE stage);
|
|
|
|
#ifdef __cplusplus
|
|
} // extern "C"
|
|
#endif
|
|
|
|
#endif // AOM_AV1_ENCODER_LOOKAHEAD_H_
|