yading@10: /*
yading@10:  * Pinnacle TARGA CineWave YUV16 decoder
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 y216_decode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     avctx->pix_fmt             = AV_PIX_FMT_YUV422P16;
yading@10:     avctx->bits_per_raw_sample = 14;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int y216_decode_frame(AVCodecContext *avctx, void *data,
yading@10:                              int *got_frame, AVPacket *avpkt)
yading@10: {
yading@10:     AVFrame *pic = data;
yading@10:     const uint16_t *src = (uint16_t *)avpkt->data;
yading@10:     uint16_t *y, *u, *v, aligned_width = FFALIGN(avctx->width, 4);
yading@10:     int i, j, ret;
yading@10: 
yading@10:     if (avpkt->size < 4 * avctx->height * aligned_width) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     pic->key_frame = 1;
yading@10:     pic->pict_type = AV_PICTURE_TYPE_I;
yading@10: 
yading@10:     y = (uint16_t *)pic->data[0];
yading@10:     u = (uint16_t *)pic->data[1];
yading@10:     v = (uint16_t *)pic->data[2];
yading@10: 
yading@10:     for (i = 0; i < avctx->height; i++) {
yading@10:         for (j = 0; j < avctx->width >> 1; j++) {
yading@10:             u[    j    ] = src[4 * j    ] << 2 | src[4 * j    ] >> 14;
yading@10:             y[2 * j    ] = src[4 * j + 1] << 2 | src[4 * j + 1] >> 14;
yading@10:             v[    j    ] = src[4 * j + 2] << 2 | src[4 * j + 2] >> 14;
yading@10:             y[2 * j + 1] = src[4 * j + 3] << 2 | src[4 * j + 3] >> 14;
yading@10:         }
yading@10: 
yading@10:         y += pic->linesize[0] >> 1;
yading@10:         u += pic->linesize[1] >> 1;
yading@10:         v += pic->linesize[2] >> 1;
yading@10:         src += aligned_width << 1;
yading@10:     }
yading@10: 
yading@10:     *got_frame = 1;
yading@10: 
yading@10:     return avpkt->size;
yading@10: }
yading@10: 
yading@10: static av_cold int y216_decode_close(AVCodecContext *avctx)
yading@10: {
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: AVCodec ff_targa_y216_decoder = {
yading@10:     .name         = "targa_y216",
yading@10:     .type         = AVMEDIA_TYPE_VIDEO,
yading@10:     .id           = AV_CODEC_ID_TARGA_Y216,
yading@10:     .init         = y216_decode_init,
yading@10:     .decode       = y216_decode_frame,
yading@10:     .close        = y216_decode_close,
yading@10:     .capabilities = CODEC_CAP_DR1,
yading@10:     .long_name    = NULL_IF_CONFIG_SMALL("Pinnacle TARGA CineWave YUV16"),
yading@10: };