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89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/******************************************************************************
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Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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#include "video-frame.h"
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#define ALIGN_SIZE(size, align) \
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size = (((size)+(align-1)) & (~(align-1)))
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/* messy code alarm */
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void video_frame_init(struct video_frame *frame, enum video_format format,
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uint32_t width, uint32_t height)
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{
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size_t size;
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size_t offsets[MAX_AV_PLANES];
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int alignment = base_get_alignment();
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if (!frame) return;
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memset(frame, 0, sizeof(struct video_frame));
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memset(offsets, 0, sizeof(offsets));
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switch (format) {
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case VIDEO_FORMAT_NONE:
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return;
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case VIDEO_FORMAT_I420:
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size = width * height;
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ALIGN_SIZE(size, alignment);
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offsets[0] = size;
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size += (width/2) * (height/2);
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ALIGN_SIZE(size, alignment);
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offsets[1] = size;
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size += (width/2) * (height/2);
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ALIGN_SIZE(size, alignment);
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frame->data[0] = bmalloc(size);
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frame->data[1] = (uint8_t*)frame->data[0] + offsets[0];
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frame->data[2] = (uint8_t*)frame->data[0] + offsets[1];
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frame->linesize[0] = width;
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frame->linesize[1] = width/2;
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frame->linesize[2] = width/2;
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break;
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case VIDEO_FORMAT_NV12:
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size = width * height;
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ALIGN_SIZE(size, alignment);
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offsets[0] = size;
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size += (width/2) * (height/2) * 2;
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ALIGN_SIZE(size, alignment);
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frame->data[0] = bmalloc(size);
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frame->data[1] = (uint8_t*)frame->data[0] + offsets[0];
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frame->linesize[0] = width;
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frame->linesize[1] = width;
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break;
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case VIDEO_FORMAT_YVYU:
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case VIDEO_FORMAT_YUY2:
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case VIDEO_FORMAT_UYVY:
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size = width * height * 2;
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ALIGN_SIZE(size, alignment);
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frame->data[0] = bmalloc(size);
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frame->linesize[0] = width*2;
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break;
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case VIDEO_FORMAT_RGBA:
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case VIDEO_FORMAT_BGRA:
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case VIDEO_FORMAT_BGRX:
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size = width * height * 4;
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ALIGN_SIZE(size, alignment);
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frame->data[0] = bmalloc(size);
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frame->linesize[0] = width*4;
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break;
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}
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}
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