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84 lines
2.6 KiB
84 lines
2.6 KiB
/* |
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* Pinnacle TARGA CineWave YUV16 decoder |
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* Copyright (c) 2012 Carl Eugen Hoyos |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "avcodec.h" |
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#include "codec_internal.h" |
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#include "decode.h" |
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static av_cold int y216_decode_init(AVCodecContext *avctx) |
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{ |
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avctx->pix_fmt = AV_PIX_FMT_YUV422P16; |
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avctx->bits_per_raw_sample = 14; |
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return 0; |
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} |
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static int y216_decode_frame(AVCodecContext *avctx, AVFrame *pic, |
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int *got_frame, AVPacket *avpkt) |
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{ |
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const uint16_t *src = (uint16_t *)avpkt->data; |
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uint16_t *y, *u, *v; |
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int aligned_width = FFALIGN(avctx->width, 4); |
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int i, j, ret; |
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if (avpkt->size < 4 * avctx->height * aligned_width) { |
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av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n"); |
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return AVERROR(EINVAL); |
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} |
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) |
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return ret; |
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pic->flags |= AV_FRAME_FLAG_KEY; |
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pic->pict_type = AV_PICTURE_TYPE_I; |
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y = (uint16_t *)pic->data[0]; |
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u = (uint16_t *)pic->data[1]; |
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v = (uint16_t *)pic->data[2]; |
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for (i = 0; i < avctx->height; i++) { |
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for (j = 0; j < avctx->width >> 1; j++) { |
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u[ j ] = src[4 * j ] << 2 | src[4 * j ] >> 14; |
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y[2 * j ] = src[4 * j + 1] << 2 | src[4 * j + 1] >> 14; |
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v[ j ] = src[4 * j + 2] << 2 | src[4 * j + 2] >> 14; |
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y[2 * j + 1] = src[4 * j + 3] << 2 | src[4 * j + 3] >> 14; |
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} |
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y += pic->linesize[0] >> 1; |
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u += pic->linesize[1] >> 1; |
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v += pic->linesize[2] >> 1; |
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src += aligned_width << 1; |
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} |
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*got_frame = 1; |
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return avpkt->size; |
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} |
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const FFCodec ff_targa_y216_decoder = { |
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.p.name = "targa_y216", |
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CODEC_LONG_NAME("Pinnacle TARGA CineWave YUV16"), |
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.p.type = AVMEDIA_TYPE_VIDEO, |
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.p.id = AV_CODEC_ID_TARGA_Y216, |
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.init = y216_decode_init, |
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FF_CODEC_DECODE_CB(y216_decode_frame), |
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.p.capabilities = AV_CODEC_CAP_DR1, |
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};
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