| 1 | /* |
| 2 | * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include "avcodec.h" |
| 22 | #include "internal.h" |
| 23 | #include "libavutil/bswap.h" |
| 24 | #include "libavutil/internal.h" |
| 25 | #include "libavutil/mem.h" |
| 26 | |
| 27 | static av_cold int decode_init(AVCodecContext *avctx) |
| 28 | { |
| 29 | if (avctx->width & 1) { |
| 30 | av_log(avctx, AV_LOG_ERROR, "v210x needs even width\n"); |
| 31 | return AVERROR(EINVAL); |
| 32 | } |
| 33 | avctx->pix_fmt = AV_PIX_FMT_YUV422P16; |
| 34 | avctx->bits_per_raw_sample = 10; |
| 35 | |
| 36 | return 0; |
| 37 | } |
| 38 | |
| 39 | static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
| 40 | AVPacket *avpkt) |
| 41 | { |
| 42 | const uint32_t *src = (const uint32_t *)avpkt->data; |
| 43 | AVFrame *pic = data; |
| 44 | int width = avctx->width; |
| 45 | int y = 0; |
| 46 | uint16_t *ydst, *udst, *vdst, *yend; |
| 47 | int ret; |
| 48 | |
| 49 | if (avpkt->size < avctx->width * avctx->height * 8 / 3) { |
| 50 | av_log(avctx, AV_LOG_ERROR, "Packet too small\n"); |
| 51 | return AVERROR_INVALIDDATA; |
| 52 | } |
| 53 | |
| 54 | if (avpkt->size > avctx->width * avctx->height * 8 / 3) { |
| 55 | avpriv_request_sample(avctx, "(Probably) padded data"); |
| 56 | } |
| 57 | |
| 58 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 59 | return ret; |
| 60 | |
| 61 | ydst = (uint16_t *)pic->data[0]; |
| 62 | udst = (uint16_t *)pic->data[1]; |
| 63 | vdst = (uint16_t *)pic->data[2]; |
| 64 | yend = ydst + width; |
| 65 | pic->pict_type = AV_PICTURE_TYPE_I; |
| 66 | pic->key_frame = 1; |
| 67 | |
| 68 | for (;;) { |
| 69 | uint32_t v = av_be2ne32(*src++); |
| 70 | *udst++ = (v >> 16) & 0xFFC0; |
| 71 | *ydst++ = (v >> 6 ) & 0xFFC0; |
| 72 | *vdst++ = (v << 4 ) & 0xFFC0; |
| 73 | |
| 74 | v = av_be2ne32(*src++); |
| 75 | *ydst++ = (v >> 16) & 0xFFC0; |
| 76 | |
| 77 | if (ydst >= yend) { |
| 78 | ydst += pic->linesize[0] / 2 - width; |
| 79 | udst += pic->linesize[1] / 2 - width / 2; |
| 80 | vdst += pic->linesize[2] / 2 - width / 2; |
| 81 | yend = ydst + width; |
| 82 | if (++y >= avctx->height) |
| 83 | break; |
| 84 | } |
| 85 | |
| 86 | *udst++ = (v >> 6 ) & 0xFFC0; |
| 87 | *ydst++ = (v << 4 ) & 0xFFC0; |
| 88 | |
| 89 | v = av_be2ne32(*src++); |
| 90 | *vdst++ = (v >> 16) & 0xFFC0; |
| 91 | *ydst++ = (v >> 6 ) & 0xFFC0; |
| 92 | |
| 93 | if (ydst >= yend) { |
| 94 | ydst += pic->linesize[0] / 2 - width; |
| 95 | udst += pic->linesize[1] / 2 - width / 2; |
| 96 | vdst += pic->linesize[2] / 2 - width / 2; |
| 97 | yend = ydst + width; |
| 98 | if (++y >= avctx->height) |
| 99 | break; |
| 100 | } |
| 101 | |
| 102 | *udst++ = (v << 4 ) & 0xFFC0; |
| 103 | |
| 104 | v = av_be2ne32(*src++); |
| 105 | *ydst++ = (v >> 16) & 0xFFC0; |
| 106 | *vdst++ = (v >> 6 ) & 0xFFC0; |
| 107 | *ydst++ = (v << 4 ) & 0xFFC0; |
| 108 | if (ydst >= yend) { |
| 109 | ydst += pic->linesize[0] / 2 - width; |
| 110 | udst += pic->linesize[1] / 2 - width / 2; |
| 111 | vdst += pic->linesize[2] / 2 - width / 2; |
| 112 | yend = ydst + width; |
| 113 | if (++y >= avctx->height) |
| 114 | break; |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | *got_frame = 1; |
| 119 | |
| 120 | return avpkt->size; |
| 121 | } |
| 122 | |
| 123 | AVCodec ff_v210x_decoder = { |
| 124 | .name = "v210x", |
| 125 | .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), |
| 126 | .type = AVMEDIA_TYPE_VIDEO, |
| 127 | .id = AV_CODEC_ID_V210X, |
| 128 | .init = decode_init, |
| 129 | .decode = decode_frame, |
| 130 | .capabilities = CODEC_CAP_DR1, |
| 131 | }; |