media/libvpx/vp9/encoder/vp9_lookahead.h@b8a032363ba2 (annotated)
media/libvpx/vp9/encoder/vp9_lookahead.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright (c) 2011 The WebM project authors. All Rights Reserved. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Use of this source code is governed by a BSD-style license |
| michael@0 | 5 | * that can be found in the LICENSE file in the root of the source |
| michael@0 | 6 | * tree. An additional intellectual property rights grant can be found |
| michael@0 | 7 | * in the file PATENTS. All contributing project authors may |
| michael@0 | 8 | * be found in the AUTHORS file in the root of the source tree. |
| michael@0 | 9 | */ |
| michael@0 | 10 | |
| michael@0 | 11 | #ifndef VP9_ENCODER_VP9_LOOKAHEAD_H_ |
| michael@0 | 12 | #define VP9_ENCODER_VP9_LOOKAHEAD_H_ |
| michael@0 | 13 | |
| michael@0 | 14 | #include "vpx_scale/yv12config.h" |
| michael@0 | 15 | #include "vpx/vpx_integer.h" |
| michael@0 | 16 | |
| michael@0 | 17 | #define MAX_LAG_BUFFERS 25 |
| michael@0 | 18 | |
| michael@0 | 19 | struct lookahead_entry { |
| michael@0 | 20 | YV12_BUFFER_CONFIG img; |
| michael@0 | 21 | int64_t ts_start; |
| michael@0 | 22 | int64_t ts_end; |
| michael@0 | 23 | unsigned int flags; |
| michael@0 | 24 | }; |
| michael@0 | 25 | |
| michael@0 | 26 | |
| michael@0 | 27 | struct lookahead_ctx; |
| michael@0 | 28 | |
| michael@0 | 29 | /**\brief Initializes the lookahead stage |
| michael@0 | 30 | * |
| michael@0 | 31 | * The lookahead stage is a queue of frame buffers on which some analysis |
| michael@0 | 32 | * may be done when buffers are enqueued. |
| michael@0 | 33 | */ |
| michael@0 | 34 | struct lookahead_ctx *vp9_lookahead_init(unsigned int width, |
| michael@0 | 35 | unsigned int height, |
| michael@0 | 36 | unsigned int subsampling_x, |
| michael@0 | 37 | unsigned int subsampling_y, |
| michael@0 | 38 | unsigned int depth); |
| michael@0 | 39 | |
| michael@0 | 40 | |
| michael@0 | 41 | /**\brief Destroys the lookahead stage |
| michael@0 | 42 | */ |
| michael@0 | 43 | void vp9_lookahead_destroy(struct lookahead_ctx *ctx); |
| michael@0 | 44 | |
| michael@0 | 45 | |
| michael@0 | 46 | /**\brief Enqueue a source buffer |
| michael@0 | 47 | * |
| michael@0 | 48 | * This function will copy the source image into a new framebuffer with |
| michael@0 | 49 | * the expected stride/border. |
| michael@0 | 50 | * |
| michael@0 | 51 | * If active_map is non-NULL and there is only one frame in the queue, then copy |
| michael@0 | 52 | * only active macroblocks. |
| michael@0 | 53 | * |
| michael@0 | 54 | * \param[in] ctx Pointer to the lookahead context |
| michael@0 | 55 | * \param[in] src Pointer to the image to enqueue |
| michael@0 | 56 | * \param[in] ts_start Timestamp for the start of this frame |
| michael@0 | 57 | * \param[in] ts_end Timestamp for the end of this frame |
| michael@0 | 58 | * \param[in] flags Flags set on this frame |
| michael@0 | 59 | * \param[in] active_map Map that specifies which macroblock is active |
| michael@0 | 60 | */ |
| michael@0 | 61 | int vp9_lookahead_push(struct lookahead_ctx *ctx, YV12_BUFFER_CONFIG *src, |
| michael@0 | 62 | int64_t ts_start, int64_t ts_end, unsigned int flags, |
| michael@0 | 63 | unsigned char *active_map); |
| michael@0 | 64 | |
| michael@0 | 65 | |
| michael@0 | 66 | /**\brief Get the next source buffer to encode |
| michael@0 | 67 | * |
| michael@0 | 68 | * |
| michael@0 | 69 | * \param[in] ctx Pointer to the lookahead context |
| michael@0 | 70 | * \param[in] drain Flag indicating the buffer should be drained |
| michael@0 | 71 | * (return a buffer regardless of the current queue depth) |
| michael@0 | 72 | * |
| michael@0 | 73 | * \retval NULL, if drain set and queue is empty |
| michael@0 | 74 | * \retval NULL, if drain not set and queue not of the configured depth |
| michael@0 | 75 | */ |
| michael@0 | 76 | struct lookahead_entry *vp9_lookahead_pop(struct lookahead_ctx *ctx, |
| michael@0 | 77 | int drain); |
| michael@0 | 78 | |
| michael@0 | 79 | |
| michael@0 | 80 | /**\brief Get a future source buffer to encode |
| michael@0 | 81 | * |
| michael@0 | 82 | * \param[in] ctx Pointer to the lookahead context |
| michael@0 | 83 | * \param[in] index Index of the frame to be returned, 0 == next frame |
| michael@0 | 84 | * |
| michael@0 | 85 | * \retval NULL, if no buffer exists at the specified index |
| michael@0 | 86 | */ |
| michael@0 | 87 | struct lookahead_entry *vp9_lookahead_peek(struct lookahead_ctx *ctx, |
| michael@0 | 88 | int index); |
| michael@0 | 89 | |
| michael@0 | 90 | |
| michael@0 | 91 | /**\brief Get the number of frames currently in the lookahead queue |
| michael@0 | 92 | * |
| michael@0 | 93 | * \param[in] ctx Pointer to the lookahead context |
| michael@0 | 94 | */ |
| michael@0 | 95 | unsigned int vp9_lookahead_depth(struct lookahead_ctx *ctx); |
| michael@0 | 96 | |
| michael@0 | 97 | #endif // VP9_ENCODER_VP9_LOOKAHEAD_H_ |
