| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * y41p decoder | ||
| 3 | * | ||
| 4 | * Copyright (c) 2012 Paul B Mahol | ||
| 5 | * | ||
| 6 | * This file is part of FFmpeg. | ||
| 7 | * | ||
| 8 | * FFmpeg is free software; you can redistribute it and/or | ||
| 9 | * modify it under the terms of the GNU Lesser General Public | ||
| 10 | * License as published by the Free Software Foundation; either | ||
| 11 | * version 2.1 of the License, or (at your option) any later version. | ||
| 12 | * | ||
| 13 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * Lesser General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU Lesser General Public | ||
| 19 | * License along with FFmpeg; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 21 | */ | ||
| 22 | |||
| 23 | #include "avcodec.h" | ||
| 24 | #include "codec_internal.h" | ||
| 25 | #include "decode.h" | ||
| 26 | |||
| 27 | 6 | static av_cold int y41p_decode_init(AVCodecContext *avctx) | |
| 28 | { | ||
| 29 | 6 | avctx->pix_fmt = AV_PIX_FMT_YUV411P; | |
| 30 | 6 | avctx->bits_per_raw_sample = 12; | |
| 31 | |||
| 32 |
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6 | if (avctx->width & 7) { |
| 33 | ✗ | av_log(avctx, AV_LOG_WARNING, "y41p requires width to be divisible by 8.\n"); | |
| 34 | } | ||
| 35 | |||
| 36 | 6 | return 0; | |
| 37 | } | ||
| 38 | |||
| 39 | 150 | static int y41p_decode_frame(AVCodecContext *avctx, AVFrame *pic, | |
| 40 | int *got_frame, AVPacket *avpkt) | ||
| 41 | { | ||
| 42 | 150 | const uint8_t *src = avpkt->data; | |
| 43 | uint8_t *y, *u, *v; | ||
| 44 | int i, j, ret; | ||
| 45 | |||
| 46 |
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150 | if (avpkt->size < 3LL * avctx->height * FFALIGN(avctx->width, 8) / 2) { |
| 47 | ✗ | av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n"); | |
| 48 | ✗ | return AVERROR(EINVAL); | |
| 49 | } | ||
| 50 | |||
| 51 |
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150 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 52 | ✗ | return ret; | |
| 53 | |||
| 54 | 150 | pic->flags |= AV_FRAME_FLAG_KEY; | |
| 55 | 150 | pic->pict_type = AV_PICTURE_TYPE_I; | |
| 56 | |||
| 57 |
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43350 | for (i = avctx->height - 1; i >= 0 ; i--) { |
| 58 | 43200 | y = &pic->data[0][i * pic->linesize[0]]; | |
| 59 | 43200 | u = &pic->data[1][i * pic->linesize[1]]; | |
| 60 | 43200 | v = &pic->data[2][i * pic->linesize[2]]; | |
| 61 |
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1944000 | for (j = 0; j < avctx->width; j += 8) { |
| 62 | 1900800 | *(u++) = *src++; | |
| 63 | 1900800 | *(y++) = *src++; | |
| 64 | 1900800 | *(v++) = *src++; | |
| 65 | 1900800 | *(y++) = *src++; | |
| 66 | |||
| 67 | 1900800 | *(u++) = *src++; | |
| 68 | 1900800 | *(y++) = *src++; | |
| 69 | 1900800 | *(v++) = *src++; | |
| 70 | 1900800 | *(y++) = *src++; | |
| 71 | |||
| 72 | 1900800 | *(y++) = *src++; | |
| 73 | 1900800 | *(y++) = *src++; | |
| 74 | 1900800 | *(y++) = *src++; | |
| 75 | 1900800 | *(y++) = *src++; | |
| 76 | } | ||
| 77 | } | ||
| 78 | |||
| 79 | 150 | *got_frame = 1; | |
| 80 | |||
| 81 | 150 | return avpkt->size; | |
| 82 | } | ||
| 83 | |||
| 84 | const FFCodec ff_y41p_decoder = { | ||
| 85 | .p.name = "y41p", | ||
| 86 | CODEC_LONG_NAME("Uncompressed YUV 4:1:1 12-bit"), | ||
| 87 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 88 | .p.id = AV_CODEC_ID_Y41P, | ||
| 89 | .init = y41p_decode_init, | ||
| 90 | FF_CODEC_DECODE_CB(y41p_decode_frame), | ||
| 91 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
| 92 | }; | ||
| 93 |