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 "codec_internal.h" 25#include "encode.h" 26#include "libavutil/intreadwrite.h" 27 28static av_cold int avui_encode_init(AVCodecContext *avctx) 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->extradata = av_mallocz(144 + AV_INPUT_BUFFER_PADDING_SIZE))) 35 return AVERROR(ENOMEM); 36 avctx->extradata_size = 144; 37 memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16); 38 if (avctx->field_order > AV_FIELD_PROGRESSIVE) { 39 avctx->extradata[19] = 2; 40 } else { 41 avctx->extradata[19] = 1; 42 } 43 memcpy(avctx->extradata + 24, "\0\0\0\x78""ARESARES0001""\0\0\0\x98", 20); 44 AV_WB32(avctx->extradata + 44, avctx->width); 45 AV_WB32(avctx->extradata + 48, avctx->height); 46 memcpy(avctx->extradata + 52, "\0\0\0\x1\0\0\0\x20\0\0\0\x2", 12); 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; 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_get_encode_buffer(avctx, pkt, size, 0)) < 0) 67 return ret; 68 dst = pkt->data; 69 if (!interlaced) { 70 memset(dst, 0, avctx->width * skip); 71 dst += avctx->width * skip; 72 } 73 74 for (i = 0; i <= interlaced; i++) { 75 uint8_t *src; 76 if (interlaced && avctx->height == 486) { 77 src = pic->data[0] + (1 - i) * pic->linesize[0]; 78 } else { 79 src = pic->data[0] + i * pic->linesize[0]; 80 } 81 memset(dst, 0, avctx->width * skip + 4 * i); 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 *got_packet = 1; 91 return 0; 92} 93 94const FFCodec ff_avui_encoder = { 95 .p.name = "avui", 96 .p.long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"), 97 .p.type = AVMEDIA_TYPE_VIDEO, 98 .p.id = AV_CODEC_ID_AVUI, 99 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_EXPERIMENTAL, 100 .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE }, 101 .init = avui_encode_init, 102 FF_CODEC_ENCODE_CB(avui_encode_frame), 103 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, 104}; 105