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 26static av_cold int avui_encode_init(AVCodecContext *avctx) 27{ 28 avctx->coded_frame = av_frame_alloc(); 29 30 if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) { 31 av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n"); 32 return AVERROR(EINVAL); 33 } 34 if (!avctx->coded_frame) { 35 av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n"); 36 return AVERROR(ENOMEM); 37 } 38 if (!(avctx->extradata = av_mallocz(24 + FF_INPUT_BUFFER_PADDING_SIZE))) 39 return AVERROR(ENOMEM); 40 avctx->extradata_size = 24; 41 memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16); 42 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { 43 avctx->extradata[19] = 2; 44 } else { 45 avctx->extradata[19] = 1; 46 } 47 48 49 return 0; 50} 51 52static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt, 53 const AVFrame *pic, int *got_packet) 54{ 55 uint8_t *dst, *src = pic->data[0]; 56 int i, j, skip, ret, size, interlaced; 57 58 interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE; 59 60 if (avctx->height == 486) { 61 skip = 10; 62 } else { 63 skip = 16; 64 } 65 size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced; 66 if ((ret = ff_alloc_packet2(avctx, pkt, size)) < 0) 67 return ret; 68 dst = pkt->data; 69 if (!interlaced) { 70 dst += avctx->width * skip; 71 } 72 73 avctx->coded_frame->key_frame = 1; 74 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; 75 76 for (i = 0; i <= interlaced; i++) { 77 if (interlaced && avctx->height == 486) { 78 src = pic->data[0] + (1 - i) * pic->linesize[0]; 79 } else { 80 src = pic->data[0] + i * pic->linesize[0]; 81 } 82 dst += avctx->width * skip + 4 * i; 83 for (j = 0; j < avctx->height; j += interlaced + 1) { 84 memcpy(dst, src, avctx->width * 2); 85 src += (interlaced + 1) * pic->linesize[0]; 86 dst += avctx->width * 2; 87 } 88 } 89 90 pkt->flags |= AV_PKT_FLAG_KEY; 91 *got_packet = 1; 92 return 0; 93} 94 95static av_cold int avui_encode_close(AVCodecContext *avctx) 96{ 97 av_freep(&avctx->coded_frame); 98 99 return 0; 100} 101 102AVCodec ff_avui_encoder = { 103 .name = "avui", 104 .long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"), 105 .type = AVMEDIA_TYPE_VIDEO, 106 .id = AV_CODEC_ID_AVUI, 107 .init = avui_encode_init, 108 .encode2 = avui_encode_frame, 109 .close = avui_encode_close, 110 .capabilities = CODEC_CAP_EXPERIMENTAL, 111 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE }, 112}; 113