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Diffstat (limited to 'third_party/aom/av1/encoder/lookahead.h')
| -rw-r--r-- | third_party/aom/av1/encoder/lookahead.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/lookahead.h b/third_party/aom/av1/encoder/lookahead.h new file mode 100644 index 000000000..19f75d7e4 --- /dev/null +++ b/third_party/aom/av1/encoder/lookahead.h @@ -0,0 +1,114 @@ +/* + * 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. + */ + +#ifndef AV1_ENCODER_LOOKAHEAD_H_ +#define AV1_ENCODER_LOOKAHEAD_H_ + +#include "aom_scale/yv12config.h" +#include "aom/aom_integer.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define MAX_LAG_BUFFERS 25 + +struct lookahead_entry { + YV12_BUFFER_CONFIG img; + int64_t ts_start; + int64_t ts_end; + aom_enc_frame_flags_t flags; +}; + +// The max of past frames we want to keep in the queue. +#define MAX_PRE_FRAMES 1 + +struct lookahead_ctx { + int max_sz; /* Absolute size of the queue */ + int sz; /* Number of buffers currently in the queue */ + int read_idx; /* Read index */ + int write_idx; /* Write index */ + struct lookahead_entry *buf; /* Buffer list */ +}; + +/**\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, +#if CONFIG_HIGHBITDEPTH + int use_highbitdepth, +#endif + unsigned int depth); + +/**\brief Destroys the lookahead stage + */ +void av1_lookahead_destroy(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. + * + * If active_map is non-NULL and there is only one frame in the queue, then copy + * only active macroblocks. + * + * \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] flags Flags set on this frame + * \param[in] active_map Map that specifies which macroblock is active + */ +int av1_lookahead_push(struct lookahead_ctx *ctx, YV12_BUFFER_CONFIG *src, + int64_t ts_start, int64_t ts_end, +#if CONFIG_HIGHBITDEPTH + int use_highbitdepth, +#endif + 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) + * + * \retval NULL, if drain set and queue is empty + * \retval NULL, if drain not set and queue not of the configured depth + */ +struct lookahead_entry *av1_lookahead_pop(struct lookahead_ctx *ctx, int drain); + +/**\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 + * + * \retval NULL, if no buffer exists at the specified index + */ +struct lookahead_entry *av1_lookahead_peek(struct lookahead_ctx *ctx, + int index); + +/**\brief Get the number of frames currently in the lookahead queue + * + * \param[in] ctx Pointer to the lookahead context + */ +unsigned int av1_lookahead_depth(struct lookahead_ctx *ctx); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // AV1_ENCODER_LOOKAHEAD_H_ |