yading@10: /*
yading@10:  * AVID Meridien encoder
yading@10:  *
yading@10:  * Copyright (c) 2012 Carl Eugen Hoyos
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "internal.h"
yading@10: 
yading@10: static av_cold int avui_encode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     avctx->coded_frame = avcodec_alloc_frame();
yading@10: 
yading@10:     if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10:     if (!avctx->coded_frame) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
yading@10:         return AVERROR(ENOMEM);
yading@10:     }
yading@10:     if (!(avctx->extradata = av_mallocz(24 + FF_INPUT_BUFFER_PADDING_SIZE)))
yading@10:         return AVERROR(ENOMEM);
yading@10:     avctx->extradata_size = 24;
yading@10:     memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16);
yading@10:     if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
yading@10:         avctx->extradata[19] = 2;
yading@10:     } else {
yading@10:         avctx->extradata[19] = 1;
yading@10:     }
yading@10: 
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
yading@10:                              const AVFrame *pic, int *got_packet)
yading@10: {
yading@10:     uint8_t *dst, *src = pic->data[0];
yading@10:     int i, j, skip, ret, size, interlaced;
yading@10: 
yading@10:     interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE;
yading@10: 
yading@10:     if (avctx->height == 486) {
yading@10:         skip = 10;
yading@10:     } else {
yading@10:         skip = 16;
yading@10:     }
yading@10:     size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
yading@10:     if ((ret = ff_alloc_packet2(avctx, pkt, size)) < 0)
yading@10:         return ret;
yading@10:     dst = pkt->data;
yading@10:     if (!interlaced) {
yading@10:         dst += avctx->width * skip;
yading@10:     }
yading@10: 
yading@10:     avctx->coded_frame->key_frame = 1;
yading@10:     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
yading@10: 
yading@10:     for (i = 0; i <= interlaced; i++) {
yading@10:         if (interlaced && avctx->height == 486) {
yading@10:             src = pic->data[0] + (1 - i) * pic->linesize[0];
yading@10:         } else {
yading@10:             src = pic->data[0] + i * pic->linesize[0];
yading@10:         }
yading@10:         dst += avctx->width * skip + 4 * i;
yading@10:         for (j = 0; j < avctx->height; j += interlaced + 1) {
yading@10:             memcpy(dst, src, avctx->width * 2);
yading@10:             src += (interlaced + 1) * pic->linesize[0];
yading@10:             dst += avctx->width * 2;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     pkt->flags |= AV_PKT_FLAG_KEY;
yading@10:     *got_packet = 1;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_cold int avui_encode_close(AVCodecContext *avctx)
yading@10: {
yading@10:     av_freep(&avctx->coded_frame);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: AVCodec ff_avui_encoder = {
yading@10:     .name         = "avui",
yading@10:     .type         = AVMEDIA_TYPE_VIDEO,
yading@10:     .id           = AV_CODEC_ID_AVUI,
yading@10:     .init         = avui_encode_init,
yading@10:     .encode2      = avui_encode_frame,
yading@10:     .close        = avui_encode_close,
yading@10:     .capabilities = CODEC_CAP_EXPERIMENTAL,
yading@10:     .pix_fmts     = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
yading@10:     .long_name    = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
yading@10: };