media/libvpx/libvpx/vp9/encoder/vp9_lookahead.h
author Johann <johannkoenig@google.com>
Mon, 16 Jan 2017 11:51:27 -0800
changeset 376885 70a5310085fa0c77bfcf88c4180c3e3af438a44d
parent 376446 b1c31c4a0a678194931779e0f13fba7b508eb109
child 377112 58764883978d7959d480b9d2722c16f40f63bf96
permissions -rw-r--r--
Bug 1223692: Update libvpx to v1.6.0. r=rillian This includes the following patches: <patch file> <upstream review commit> <upstream hash> 1237848-check-lookahead-ctx.patch https://chromium-review.googlesource.com/324510 4f780e94a1fa54f22256e0f4d42a77c340a38fa1 block_error_fp.patch https://chromium-review.googlesource.com/282611 ff8505a54d0b3dda220f5c0695519c353c82b933 cast-char-to-uint-before-shift.patch https://chromium-review.googlesource.com/345470 2240d83d7882ce2d5d0826b9ce33b86321d7a724 clamp_abs_lvl_seg.patch https://chromium-review.googlesource.com/315754 2e693eb80e705ea68e23eed19616d22b4778b45a clamp-abs-QIndex.patch https://chromium-review.googlesource.com/315802 ff3674a15e5b1a006546e1edc64c3e778eb34ab1 rename_duplicate_files.patch https://chromium-review.googlesource.com/281967 6a82f0d7fb9ee908c389e8d55444bbaed3d54e9c https://chromium-review.googlesource.com/317880 d36659cec7fab96cedc67db4d511ed7135637d0e vp9_filter_restore_aligment.patch https://chromium-review.googlesource.com/276889 33b3953c548a20c0aee705657df0440a740c28b7 vpx_once.patch https://chromium-review.googlesource.com/312467 2635573a7f2e4bbd259379acf91efb97d983359f MozReview-Commit-ID: R7qB6egl3Z

/*
 *  Copyright (c) 2011 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef VP9_ENCODER_VP9_LOOKAHEAD_H_
#define VP9_ENCODER_VP9_LOOKAHEAD_H_

#include "vpx_scale/yv12config.h"
#include "vpx/vpx_integer.h"

#if CONFIG_SPATIAL_SVC
#include "vpx/vp8cx.h"
#include "vpx/vpx_encoder.h"
#endif

#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;
  unsigned int        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 *vp9_lookahead_init(unsigned int width,
                                         unsigned int height,
                                         unsigned int subsampling_x,
                                         unsigned int subsampling_y,
#if CONFIG_VP9_HIGHBITDEPTH
                                         int use_highbitdepth,
#endif
                                         unsigned int depth);


/**\brief Destroys the lookahead stage
 */
void vp9_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 vp9_lookahead_push(struct lookahead_ctx *ctx, YV12_BUFFER_CONFIG *src,
                       int64_t ts_start, int64_t ts_end,
#if CONFIG_VP9_HIGHBITDEPTH
                       int use_highbitdepth,
#endif
                       unsigned int 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 *vp9_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 *vp9_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 vp9_lookahead_depth(struct lookahead_ctx *ctx);

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // VP9_ENCODER_VP9_LOOKAHEAD_H_