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81 lines
3.2 KiB
81 lines
3.2 KiB
/* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVFILTER_VIDEO_H |
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#define AVFILTER_VIDEO_H |
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#include "avfilter.h" |
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AVFilterBufferRef *ff_default_get_video_buffer(AVFilterLink *link, |
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int perms, int w, int h); |
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AVFilterBufferRef *ff_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h); |
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/** |
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* Request a picture buffer with a specific set of permissions. |
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* |
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* @param link the output link to the filter from which the buffer will |
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* be requested |
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* @param perms the required access permissions |
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* @param w the minimum width of the buffer to allocate |
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* @param h the minimum height of the buffer to allocate |
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* @return A reference to the buffer. This must be unreferenced with |
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* avfilter_unref_buffer when you are finished with it. |
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*/ |
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AVFilterBufferRef *ff_get_video_buffer(AVFilterLink *link, int perms, |
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int w, int h); |
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void ff_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref); |
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void ff_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir); |
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void ff_null_end_frame(AVFilterLink *link); |
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/** |
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* Notify the next filter of the start of a frame. |
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* |
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* @param link the output link the frame will be sent over |
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* @param picref A reference to the frame about to be sent. The data for this |
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* frame need only be valid once draw_slice() is called for that |
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* portion. The receiving filter will free this reference when |
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* it no longer needs it. |
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*/ |
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void ff_start_frame(AVFilterLink *link, AVFilterBufferRef *picref); |
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/** |
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* Notify the next filter that the current frame has finished. |
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* |
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* @param link the output link the frame was sent over |
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*/ |
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void ff_end_frame(AVFilterLink *link); |
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/** |
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* Send a slice to the next filter. |
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* |
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* Slices have to be provided in sequential order, either in |
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* top-bottom or bottom-top order. If slices are provided in |
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* non-sequential order the behavior of the function is undefined. |
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* |
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* @param link the output link over which the frame is being sent |
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* @param y offset in pixels from the top of the image for this slice |
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* @param h height of this slice in pixels |
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* @param slice_dir the assumed direction for sending slices, |
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* from the top slice to the bottom slice if the value is 1, |
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* from the bottom slice to the top slice if the value is -1, |
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* for other values the behavior of the function is undefined. |
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*/ |
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void ff_draw_slice(AVFilterLink *link, int y, int h, int slice_dir); |
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#endif /* AVFILTER_VIDEO_H */
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