blob: 996412adb99af23c9c0297ef04b0d0ddeff478d2
| 1 | /* |
| 2 | * Raw video utils |
| 3 | * Copyright (c) 2016 Michael Niedermayer |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include "avformat.h" |
| 23 | #include "internal.h" |
| 24 | |
| 25 | int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride) |
| 26 | { |
| 27 | int ret; |
| 28 | AVPacket *pkt = *ppkt; |
| 29 | int64_t bpc = par->bits_per_coded_sample != 15 ? par->bits_per_coded_sample : 16; |
| 30 | int min_stride = (par->width * bpc + 7) >> 3; |
| 31 | int with_pal_size = min_stride * par->height + 1024; |
| 32 | int contains_pal = bpc == 8 && pkt->size == with_pal_size; |
| 33 | int size = contains_pal ? min_stride * par->height : pkt->size; |
| 34 | int stride = size / par->height; |
| 35 | int padding = expected_stride - FFMIN(expected_stride, stride); |
| 36 | int y; |
| 37 | AVPacket *new_pkt; |
| 38 | |
| 39 | if (pkt->size == expected_stride * par->height) |
| 40 | return 0; |
| 41 | if (size != stride * par->height) |
| 42 | return 0; |
| 43 | |
| 44 | new_pkt = av_packet_alloc(); |
| 45 | if (!new_pkt) |
| 46 | return AVERROR(ENOMEM); |
| 47 | |
| 48 | ret = av_new_packet(new_pkt, expected_stride * par->height); |
| 49 | if (ret < 0) |
| 50 | goto fail; |
| 51 | |
| 52 | ret = av_packet_copy_props(new_pkt, pkt); |
| 53 | if (ret < 0) |
| 54 | goto fail; |
| 55 | |
| 56 | for (y = 0; y<par->height; y++) { |
| 57 | memcpy(new_pkt->data + y*expected_stride, pkt->data + y*stride, FFMIN(expected_stride, stride)); |
| 58 | memset(new_pkt->data + y*expected_stride + expected_stride - padding, 0, padding); |
| 59 | } |
| 60 | |
| 61 | *ppkt = new_pkt; |
| 62 | return 1 + contains_pal; |
| 63 | fail: |
| 64 | av_packet_free(&new_pkt); |
| 65 | |
| 66 | return ret; |
| 67 | } |
| 68 |