yading@10: /*
yading@10:  * y41p encoder
yading@10:  *
yading@10:  * Copyright (c) 2012 Paul B Mahol
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 y41p_encode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     if (avctx->width & 7) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "y41p requires width to be divisible by 8.\n");
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10: 
yading@10:     avctx->coded_frame = avcodec_alloc_frame();
yading@10:     avctx->bits_per_coded_sample = 12;
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: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int y41p_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
yading@10:                              const AVFrame *pic, int *got_packet)
yading@10: {
yading@10:     uint8_t *dst;
yading@10:     uint8_t *y, *u, *v;
yading@10:     int i, j, ret;
yading@10: 
yading@10:     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * 1.5)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     avctx->coded_frame->key_frame = 1;
yading@10:     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
yading@10:     dst = pkt->data;
yading@10: 
yading@10:     for (i = avctx->height - 1; i >= 0; i--) {
yading@10:         y = &pic->data[0][i * pic->linesize[0]];
yading@10:         u = &pic->data[1][i * pic->linesize[1]];
yading@10:         v = &pic->data[2][i * pic->linesize[2]];
yading@10:         for (j = 0; j < avctx->width; j += 8) {
yading@10:             *(dst++) = *(u++);
yading@10:             *(dst++) = *(y++);
yading@10:             *(dst++) = *(v++);
yading@10:             *(dst++) = *(y++);
yading@10: 
yading@10:             *(dst++) = *(u++);
yading@10:             *(dst++) = *(y++);
yading@10:             *(dst++) = *(v++);
yading@10:             *(dst++) = *(y++);
yading@10: 
yading@10:             *(dst++) = *(y++);
yading@10:             *(dst++) = *(y++);
yading@10:             *(dst++) = *(y++);
yading@10:             *(dst++) = *(y++);
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 y41p_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_y41p_encoder = {
yading@10:     .name         = "y41p",
yading@10:     .type         = AVMEDIA_TYPE_VIDEO,
yading@10:     .id           = AV_CODEC_ID_Y41P,
yading@10:     .init         = y41p_encode_init,
yading@10:     .encode2      = y41p_encode_frame,
yading@10:     .close        = y41p_encode_close,
yading@10:     .pix_fmts     = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
yading@10:                                                  AV_PIX_FMT_NONE },
yading@10:     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
yading@10: };