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67 lines
2.2 KiB
67 lines
2.2 KiB
/* |
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* Raw video utils |
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* Copyright (c) 2016 Michael Niedermayer |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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#include "avformat.h" |
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#include "internal.h" |
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int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride) |
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{ |
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int ret; |
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AVPacket *pkt = *ppkt; |
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int64_t bpc = par->bits_per_coded_sample != 15 ? par->bits_per_coded_sample : 16; |
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int min_stride = (par->width * bpc + 7) >> 3; |
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int with_pal_size = min_stride * par->height + 1024; |
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int contains_pal = bpc == 8 && pkt->size == with_pal_size; |
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int size = contains_pal ? min_stride * par->height : pkt->size; |
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int stride = size / par->height; |
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int padding = expected_stride - FFMIN(expected_stride, stride); |
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int y; |
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AVPacket *new_pkt; |
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if (pkt->size == expected_stride * par->height) |
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return 0; |
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if (size != stride * par->height) |
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return 0; |
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new_pkt = av_packet_alloc(); |
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if (!new_pkt) |
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return AVERROR(ENOMEM); |
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ret = av_new_packet(new_pkt, expected_stride * par->height); |
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if (ret < 0) |
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goto fail; |
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ret = av_packet_copy_props(new_pkt, pkt); |
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if (ret < 0) |
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goto fail; |
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for (y = 0; y<par->height; y++) { |
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memcpy(new_pkt->data + y*expected_stride, pkt->data + y*stride, FFMIN(expected_stride, stride)); |
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memset(new_pkt->data + y*expected_stride + expected_stride - padding, 0, padding); |
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} |
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*ppkt = new_pkt; |
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return 1 + contains_pal; |
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fail: |
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av_packet_free(&new_pkt); |
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return ret; |
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}
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