diff options
Diffstat (limited to 'libavformat/rawutils.c')
-rw-r--r-- | libavformat/rawutils.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/libavformat/rawutils.c b/libavformat/rawutils.c new file mode 100644 index 0000000000..996412adb9 --- /dev/null +++ b/libavformat/rawutils.c @@ -0,0 +1,67 @@ +/* + * Raw video utils + * Copyright (c) 2016 Michael Niedermayer + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "avformat.h" +#include "internal.h" + +int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride) +{ + int ret; + AVPacket *pkt = *ppkt; + int64_t bpc = par->bits_per_coded_sample != 15 ? par->bits_per_coded_sample : 16; + int min_stride = (par->width * bpc + 7) >> 3; + int with_pal_size = min_stride * par->height + 1024; + int contains_pal = bpc == 8 && pkt->size == with_pal_size; + int size = contains_pal ? min_stride * par->height : pkt->size; + int stride = size / par->height; + int padding = expected_stride - FFMIN(expected_stride, stride); + int y; + AVPacket *new_pkt; + + if (pkt->size == expected_stride * par->height) + return 0; + if (size != stride * par->height) + return 0; + + new_pkt = av_packet_alloc(); + if (!new_pkt) + return AVERROR(ENOMEM); + + ret = av_new_packet(new_pkt, expected_stride * par->height); + if (ret < 0) + goto fail; + + ret = av_packet_copy_props(new_pkt, pkt); + if (ret < 0) + goto fail; + + for (y = 0; y<par->height; y++) { + memcpy(new_pkt->data + y*expected_stride, pkt->data + y*stride, FFMIN(expected_stride, stride)); + memset(new_pkt->data + y*expected_stride + expected_stride - padding, 0, padding); + } + + *ppkt = new_pkt; + return 1 + contains_pal; +fail: + av_packet_free(&new_pkt); + + return ret; +} |