2 * Pinnacle TARGA CineWave YUV16 decoder
3 * Copyright (c) 2012 Carl Eugen Hoyos
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 static av_cold int y216_decode_init(AVCodecContext *avctx)
27 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
28 avctx->bits_per_raw_sample = 14;
30 avctx->coded_frame = avcodec_alloc_frame();
32 if (!avctx->coded_frame) {
33 av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
34 return AVERROR(ENOMEM);
40 static int y216_decode_frame(AVCodecContext *avctx, void *data,
41 int *got_frame, AVPacket *avpkt)
43 AVFrame *pic = avctx->coded_frame;
44 const uint16_t *src = (uint16_t *)avpkt->data;
45 uint16_t *y, *u, *v, aligned_width = FFALIGN(avctx->width, 4);
49 avctx->release_buffer(avctx, pic);
51 if (avpkt->size < 4 * avctx->height * aligned_width) {
52 av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
53 return AVERROR(EINVAL);
58 if (ff_get_buffer(avctx, pic) < 0) {
59 av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
60 return AVERROR(ENOMEM);
64 pic->pict_type = AV_PICTURE_TYPE_I;
66 y = (uint16_t *)pic->data[0];
67 u = (uint16_t *)pic->data[1];
68 v = (uint16_t *)pic->data[2];
70 for (i = 0; i < avctx->height; i++) {
71 for (j = 0; j < avctx->width >> 1; j++) {
72 u[ j ] = src[4 * j ] << 2 | src[4 * j ] >> 14;
73 y[2 * j ] = src[4 * j + 1] << 2 | src[4 * j + 1] >> 14;
74 v[ j ] = src[4 * j + 2] << 2 | src[4 * j + 2] >> 14;
75 y[2 * j + 1] = src[4 * j + 3] << 2 | src[4 * j + 3] >> 14;
78 y += pic->linesize[0] >> 1;
79 u += pic->linesize[1] >> 1;
80 v += pic->linesize[2] >> 1;
81 src += aligned_width << 1;
85 *(AVFrame *)data = *pic;
90 static av_cold int y216_decode_close(AVCodecContext *avctx)
92 if (avctx->coded_frame->data[0])
93 avctx->release_buffer(avctx, avctx->coded_frame);
95 av_freep(&avctx->coded_frame);
100 AVCodec ff_targa_y216_decoder = {
101 .name = "targa_y216",
102 .type = AVMEDIA_TYPE_VIDEO,
103 .id = AV_CODEC_ID_TARGA_Y216,
104 .init = y216_decode_init,
105 .decode = y216_decode_frame,
106 .close = y216_decode_close,
107 .capabilities = CODEC_CAP_DR1,
108 .long_name = NULL_IF_CONFIG_SMALL("Pinnacle TARGA CineWave YUV16"),