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comparison: media/libvpx/vp8/encoder/lookahead.h
media/libvpx/vp8/encoder/lookahead.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:7b4ce01a25d6 |
|---|---|
| 1 /* | |
| 2 * Copyright (c) 2011 The WebM project authors. All Rights Reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 #ifndef LOOKAHEAD_H | |
| 11 #define LOOKAHEAD_H | |
| 12 #include "vpx_scale/yv12config.h" | |
| 13 #include "vpx/vpx_integer.h" | |
| 14 | |
| 15 struct lookahead_entry | |
| 16 { | |
| 17 YV12_BUFFER_CONFIG img; | |
| 18 int64_t ts_start; | |
| 19 int64_t ts_end; | |
| 20 unsigned int flags; | |
| 21 }; | |
| 22 | |
| 23 | |
| 24 struct lookahead_ctx; | |
| 25 | |
| 26 /**\brief Initializes the lookahead stage | |
| 27 * | |
| 28 * The lookahead stage is a queue of frame buffers on which some analysis | |
| 29 * may be done when buffers are enqueued. | |
| 30 * | |
| 31 * | |
| 32 */ | |
| 33 struct lookahead_ctx* vp8_lookahead_init(unsigned int width, | |
| 34 unsigned int height, | |
| 35 unsigned int depth | |
| 36 ); | |
| 37 | |
| 38 | |
| 39 /**\brief Destroys the lookahead stage | |
| 40 * | |
| 41 */ | |
| 42 void vp8_lookahead_destroy(struct lookahead_ctx *ctx); | |
| 43 | |
| 44 | |
| 45 /**\brief Enqueue a source buffer | |
| 46 * | |
| 47 * This function will copy the source image into a new framebuffer with | |
| 48 * the expected stride/border. | |
| 49 * | |
| 50 * If active_map is non-NULL and there is only one frame in the queue, then copy | |
| 51 * only active macroblocks. | |
| 52 * | |
| 53 * \param[in] ctx Pointer to the lookahead context | |
| 54 * \param[in] src Pointer to the image to enqueue | |
| 55 * \param[in] ts_start Timestamp for the start of this frame | |
| 56 * \param[in] ts_end Timestamp for the end of this frame | |
| 57 * \param[in] flags Flags set on this frame | |
| 58 * \param[in] active_map Map that specifies which macroblock is active | |
| 59 */ | |
| 60 int | |
| 61 vp8_lookahead_push(struct lookahead_ctx *ctx, | |
| 62 YV12_BUFFER_CONFIG *src, | |
| 63 int64_t ts_start, | |
| 64 int64_t ts_end, | |
| 65 unsigned int flags, | |
| 66 unsigned char *active_map); | |
| 67 | |
| 68 | |
| 69 /**\brief Get the next source buffer to encode | |
| 70 * | |
| 71 * | |
| 72 * \param[in] ctx Pointer to the lookahead context | |
| 73 * \param[in] drain Flag indicating the buffer should be drained | |
| 74 * (return a buffer regardless of the current queue depth) | |
| 75 * | |
| 76 * \retval NULL, if drain set and queue is empty | |
| 77 * \retval NULL, if drain not set and queue not of the configured depth | |
| 78 * | |
| 79 */ | |
| 80 struct lookahead_entry* | |
| 81 vp8_lookahead_pop(struct lookahead_ctx *ctx, | |
| 82 int drain); | |
| 83 | |
| 84 | |
| 85 #define PEEK_FORWARD 1 | |
| 86 #define PEEK_BACKWARD -1 | |
| 87 /**\brief Get a future source buffer to encode | |
| 88 * | |
| 89 * \param[in] ctx Pointer to the lookahead context | |
| 90 * \param[in] index Index of the frame to be returned, 0 == next frame | |
| 91 * | |
| 92 * \retval NULL, if no buffer exists at the specified index | |
| 93 * | |
| 94 */ | |
| 95 struct lookahead_entry* | |
| 96 vp8_lookahead_peek(struct lookahead_ctx *ctx, | |
| 97 unsigned int index, | |
| 98 int direction); | |
| 99 | |
| 100 | |
| 101 /**\brief Get the number of frames currently in the lookahead queue | |
| 102 * | |
| 103 * \param[in] ctx Pointer to the lookahead context | |
| 104 */ | |
| 105 unsigned int | |
| 106 vp8_lookahead_depth(struct lookahead_ctx *ctx); | |
| 107 | |
| 108 | |
| 109 #endif |
