| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * AVID Meridien decoder | ||
| 3 | * | ||
| 4 | * Copyright (c) 2012 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 | #include "libavutil/intreadwrite.h" | ||
| 27 | |||
| 28 | 6 | static av_cold int avui_decode_init(AVCodecContext *avctx) | |
| 29 | { | ||
| 30 | 6 | avctx->pix_fmt = AV_PIX_FMT_YUVA422P; | |
| 31 | 6 | return 0; | |
| 32 | } | ||
| 33 | |||
| 34 | 150 | static int avui_decode_frame(AVCodecContext *avctx, AVFrame *pic, | |
| 35 | int *got_frame, AVPacket *avpkt) | ||
| 36 | { | ||
| 37 | int ret; | ||
| 38 | 150 | const uint8_t *src = avpkt->data, *extradata = avctx->extradata; | |
| 39 | const uint8_t *srca; | ||
| 40 | uint8_t *y, *u, *v, *a; | ||
| 41 | 150 | int transparent, interlaced = 1, skip, opaque_length, i, j, k; | |
| 42 | 150 | uint32_t extradata_size = avctx->extradata_size; | |
| 43 | |||
| 44 |
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150 | while (extradata_size >= 24) { |
| 45 | 150 | uint32_t atom_size = AV_RB32(extradata); | |
| 46 |
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150 | if (!memcmp(&extradata[4], "APRGAPRG0001", 12)) { |
| 47 | 150 | interlaced = extradata[19] != 1; | |
| 48 | 150 | break; | |
| 49 | } | ||
| 50 | ✗ | if (atom_size && atom_size <= extradata_size) { | |
| 51 | ✗ | extradata += atom_size; | |
| 52 | ✗ | extradata_size -= atom_size; | |
| 53 | } else { | ||
| 54 | break; | ||
| 55 | } | ||
| 56 | } | ||
| 57 |
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150 | if (avctx->height == 486) { |
| 58 | ✗ | skip = 10; | |
| 59 | } else { | ||
| 60 | 150 | skip = 16; | |
| 61 | } | ||
| 62 | 150 | opaque_length = 2 * avctx->width * (avctx->height + skip) + 4 * interlaced; | |
| 63 |
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150 | if (avpkt->size < opaque_length) { |
| 64 | ✗ | av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n"); | |
| 65 | ✗ | return AVERROR(EINVAL); | |
| 66 | } | ||
| 67 |
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150 | transparent = avctx->bits_per_coded_sample == 32 && |
| 68 | ✗ | avpkt->size >= opaque_length * 2 + 4; | |
| 69 | 150 | srca = src + opaque_length + 5; | |
| 70 | |||
| 71 |
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150 | if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
| 72 | ✗ | return ret; | |
| 73 | |||
| 74 |
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150 | if (!interlaced) { |
| 75 | 150 | src += avctx->width * skip; | |
| 76 | 150 | srca += avctx->width * skip; | |
| 77 | } | ||
| 78 | |||
| 79 |
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300 | for (i = 0; i < interlaced + 1; i++) { |
| 80 | 150 | src += avctx->width * skip; | |
| 81 | 150 | srca += avctx->width * skip; | |
| 82 |
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150 | if (interlaced && avctx->height == 486) { |
| 83 | ✗ | y = pic->data[0] + (1 - i) * pic->linesize[0]; | |
| 84 | ✗ | u = pic->data[1] + (1 - i) * pic->linesize[1]; | |
| 85 | ✗ | v = pic->data[2] + (1 - i) * pic->linesize[2]; | |
| 86 | ✗ | a = pic->data[3] + (1 - i) * pic->linesize[3]; | |
| 87 | } else { | ||
| 88 | 150 | y = pic->data[0] + i * pic->linesize[0]; | |
| 89 | 150 | u = pic->data[1] + i * pic->linesize[1]; | |
| 90 | 150 | v = pic->data[2] + i * pic->linesize[2]; | |
| 91 | 150 | a = pic->data[3] + i * pic->linesize[3]; | |
| 92 | } | ||
| 93 | |||
| 94 |
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86550 | for (j = 0; j < avctx->height >> interlaced; j++) { |
| 95 |
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31190400 | for (k = 0; k < avctx->width >> 1; k++) { |
| 96 | 31104000 | u[ k ] = *src++; | |
| 97 | 31104000 | y[2 * k ] = *src++; | |
| 98 |
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31104000 | a[2 * k ] = 0xFF - (transparent ? *srca++ : 0); |
| 99 | 31104000 | srca++; | |
| 100 | 31104000 | v[ k ] = *src++; | |
| 101 | 31104000 | y[2 * k + 1] = *src++; | |
| 102 |
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31104000 | a[2 * k + 1] = 0xFF - (transparent ? *srca++ : 0); |
| 103 | 31104000 | srca++; | |
| 104 | } | ||
| 105 | |||
| 106 | 86400 | y += (interlaced + 1) * pic->linesize[0]; | |
| 107 | 86400 | u += (interlaced + 1) * pic->linesize[1]; | |
| 108 | 86400 | v += (interlaced + 1) * pic->linesize[2]; | |
| 109 | 86400 | a += (interlaced + 1) * pic->linesize[3]; | |
| 110 | } | ||
| 111 | 150 | src += 4; | |
| 112 | 150 | srca += 4; | |
| 113 | } | ||
| 114 | 150 | *got_frame = 1; | |
| 115 | |||
| 116 | 150 | return avpkt->size; | |
| 117 | } | ||
| 118 | |||
| 119 | const FFCodec ff_avui_decoder = { | ||
| 120 | .p.name = "avui", | ||
| 121 | CODEC_LONG_NAME("Avid Meridien Uncompressed"), | ||
| 122 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 123 | .p.id = AV_CODEC_ID_AVUI, | ||
| 124 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
| 125 | .init = avui_decode_init, | ||
| 126 | FF_CODEC_DECODE_CB(avui_decode_frame), | ||
| 127 | }; | ||
| 128 |