blob: b219906706fd20dab99793e02e5b4afbf128c5c1
| 1 | /* |
| 2 | * AVID Meridien encoder |
| 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 "internal.h" |
| 25 | #include "libavutil/intreadwrite.h" |
| 26 | |
| 27 | static av_cold int avui_encode_init(AVCodecContext *avctx) |
| 28 | { |
| 29 | if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) { |
| 30 | av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n"); |
| 31 | return AVERROR(EINVAL); |
| 32 | } |
| 33 | if (!(avctx->extradata = av_mallocz(144 + AV_INPUT_BUFFER_PADDING_SIZE))) |
| 34 | return AVERROR(ENOMEM); |
| 35 | avctx->extradata_size = 144; |
| 36 | memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16); |
| 37 | if (avctx->field_order > AV_FIELD_PROGRESSIVE) { |
| 38 | avctx->extradata[19] = 2; |
| 39 | } else { |
| 40 | avctx->extradata[19] = 1; |
| 41 | } |
| 42 | memcpy(avctx->extradata + 24, "\0\0\0\x78""ARESARES0001""\0\0\0\x98", 20); |
| 43 | AV_WB32(avctx->extradata + 44, avctx->width); |
| 44 | AV_WB32(avctx->extradata + 48, avctx->height); |
| 45 | memcpy(avctx->extradata + 52, "\0\0\0\x1\0\0\0\x20\0\0\0\x2", 12); |
| 46 | |
| 47 | |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
| 52 | const AVFrame *pic, int *got_packet) |
| 53 | { |
| 54 | uint8_t *dst; |
| 55 | int i, j, skip, ret, size, interlaced; |
| 56 | |
| 57 | interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE; |
| 58 | |
| 59 | if (avctx->height == 486) { |
| 60 | skip = 10; |
| 61 | } else { |
| 62 | skip = 16; |
| 63 | } |
| 64 | size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced; |
| 65 | if ((ret = ff_alloc_packet2(avctx, pkt, size, size)) < 0) |
| 66 | return ret; |
| 67 | dst = pkt->data; |
| 68 | if (!interlaced) { |
| 69 | memset(dst, 0, avctx->width * skip); |
| 70 | dst += avctx->width * skip; |
| 71 | } |
| 72 | |
| 73 | for (i = 0; i <= interlaced; i++) { |
| 74 | uint8_t *src; |
| 75 | if (interlaced && avctx->height == 486) { |
| 76 | src = pic->data[0] + (1 - i) * pic->linesize[0]; |
| 77 | } else { |
| 78 | src = pic->data[0] + i * pic->linesize[0]; |
| 79 | } |
| 80 | memset(dst, 0, avctx->width * skip + 4 * i); |
| 81 | dst += avctx->width * skip + 4 * i; |
| 82 | for (j = 0; j < avctx->height; j += interlaced + 1) { |
| 83 | memcpy(dst, src, avctx->width * 2); |
| 84 | src += (interlaced + 1) * pic->linesize[0]; |
| 85 | dst += avctx->width * 2; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | pkt->flags |= AV_PKT_FLAG_KEY; |
| 90 | *got_packet = 1; |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | AVCodec ff_avui_encoder = { |
| 95 | .name = "avui", |
| 96 | .long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"), |
| 97 | .type = AVMEDIA_TYPE_VIDEO, |
| 98 | .id = AV_CODEC_ID_AVUI, |
| 99 | .init = avui_encode_init, |
| 100 | .encode2 = avui_encode_frame, |
| 101 | .capabilities = AV_CODEC_CAP_EXPERIMENTAL | AV_CODEC_CAP_INTRA_ONLY, |
| 102 | .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE }, |
| 103 | }; |
| 104 |