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Diffstat (limited to 'vp8/encoder/lookahead.h')
-rw-r--r-- | vp8/encoder/lookahead.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/vp8/encoder/lookahead.h b/vp8/encoder/lookahead.h new file mode 100644 index 000000000..a483d7e0b --- /dev/null +++ b/vp8/encoder/lookahead.h @@ -0,0 +1,101 @@ +/* + * 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 LOOKAHEAD_H +#define LOOKAHEAD_H +#include "vpx_scale/yv12config.h" +#include "vpx/vpx_integer.h" + +struct lookahead_entry +{ + YV12_BUFFER_CONFIG img; + int64_t ts_start; + int64_t ts_end; + unsigned int flags; +}; + + +struct lookahead_ctx; + +/**\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* vp8_lookahead_init(unsigned int width, + unsigned int height, + unsigned int depth + ); + + +/**\brief Destroys the lookahead stage + * + */ +void vp8_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. + * + * \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 + */ +int +vp8_lookahead_push(struct lookahead_ctx *ctx, + YV12_BUFFER_CONFIG *src, + int64_t ts_start, + int64_t ts_end, + 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* +vp8_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* +vp8_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 +vp8_lookahead_depth(struct lookahead_ctx *ctx); + + +#endif |