| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * libquicktime yuv4 decoder | ||
| 3 | * | ||
| 4 | * Copyright (c) 2011 Carl Eugen Hoyos | ||
| 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 | 8 | static av_cold int yuv4_decode_init(AVCodecContext *avctx) | |
| 28 | { | ||
| 29 | 8 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; | |
| 30 | |||
| 31 | 8 | return 0; | |
| 32 | } | ||
| 33 | |||
| 34 | 200 | static int yuv4_decode_frame(AVCodecContext *avctx, AVFrame *pic, | |
| 35 | int *got_frame, AVPacket *avpkt) | ||
| 36 | { | ||
| 37 | 200 | const uint8_t *src = avpkt->data; | |
| 38 | uint8_t *y, *u, *v; | ||
| 39 | int i, j, ret; | ||
| 40 | |||
| 41 |
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200 | if (avpkt->size < 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1)) { |
| 42 | ✗ | av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n"); | |
| 43 | ✗ | return AVERROR(EINVAL); | |
| 44 | } | ||
| 45 | |||
| 46 |
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200 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 47 | ✗ | return ret; | |
| 48 | |||
| 49 | 200 | pic->flags |= AV_FRAME_FLAG_KEY; | |
| 50 | 200 | pic->pict_type = AV_PICTURE_TYPE_I; | |
| 51 | |||
| 52 | 200 | y = pic->data[0]; | |
| 53 | 200 | u = pic->data[1]; | |
| 54 | 200 | v = pic->data[2]; | |
| 55 | |||
| 56 |
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22650 | for (i = 0; i < (avctx->height + 1) >> 1; i++) { |
| 57 |
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3838500 | for (j = 0; j < (avctx->width + 1) >> 1; j++) { |
| 58 | 3816050 | u[j] = *src++ ^ 0x80; | |
| 59 | 3816050 | v[j] = *src++ ^ 0x80; | |
| 60 | 3816050 | y[ 2 * j ] = *src++; | |
| 61 | 3816050 | y[ 2 * j + 1] = *src++; | |
| 62 | 3816050 | y[pic->linesize[0] + 2 * j ] = *src++; | |
| 63 | 3816050 | y[pic->linesize[0] + 2 * j + 1] = *src++; | |
| 64 | } | ||
| 65 | |||
| 66 | 22450 | y += 2 * pic->linesize[0]; | |
| 67 | 22450 | u += pic->linesize[1]; | |
| 68 | 22450 | v += pic->linesize[2]; | |
| 69 | } | ||
| 70 | |||
| 71 | 200 | *got_frame = 1; | |
| 72 | |||
| 73 | 200 | return avpkt->size; | |
| 74 | } | ||
| 75 | |||
| 76 | const FFCodec ff_yuv4_decoder = { | ||
| 77 | .p.name = "yuv4", | ||
| 78 | CODEC_LONG_NAME("Uncompressed packed 4:2:0"), | ||
| 79 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 80 | .p.id = AV_CODEC_ID_YUV4, | ||
| 81 | .init = yuv4_decode_init, | ||
| 82 | FF_CODEC_DECODE_CB(yuv4_decode_frame), | ||
| 83 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
| 84 | }; | ||
| 85 |