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Diffstat (limited to 'libavcodec/targa_y216dec.c')
-rw-r--r--libavcodec/targa_y216dec.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/libavcodec/targa_y216dec.c b/libavcodec/targa_y216dec.c
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index 0000000000..21b3d35d67
--- /dev/null
+++ b/libavcodec/targa_y216dec.c
@@ -0,0 +1,83 @@
+/*
+ * Pinnacle TARGA CineWave YUV16 decoder
+ * Copyright (c) 2012 Carl Eugen Hoyos
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avcodec.h"
+#include "internal.h"
+
+static av_cold int y216_decode_init(AVCodecContext *avctx)
+{
+ avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
+ avctx->bits_per_raw_sample = 14;
+
+ return 0;
+}
+
+static int y216_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame, AVPacket *avpkt)
+{
+ AVFrame *pic = data;
+ const uint16_t *src = (uint16_t *)avpkt->data;
+ uint16_t *y, *u, *v, aligned_width = FFALIGN(avctx->width, 4);
+ int i, j, ret;
+
+ if (avpkt->size < 4 * avctx->height * aligned_width) {
+ av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
+ return AVERROR(EINVAL);
+ }
+
+ if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
+ return ret;
+
+ pic->key_frame = 1;
+ pic->pict_type = AV_PICTURE_TYPE_I;
+
+ y = (uint16_t *)pic->data[0];
+ u = (uint16_t *)pic->data[1];
+ v = (uint16_t *)pic->data[2];
+
+ for (i = 0; i < avctx->height; i++) {
+ for (j = 0; j < avctx->width >> 1; j++) {
+ u[ j ] = src[4 * j ] << 2 | src[4 * j ] >> 14;
+ y[2 * j ] = src[4 * j + 1] << 2 | src[4 * j + 1] >> 14;
+ v[ j ] = src[4 * j + 2] << 2 | src[4 * j + 2] >> 14;
+ y[2 * j + 1] = src[4 * j + 3] << 2 | src[4 * j + 3] >> 14;
+ }
+
+ y += pic->linesize[0] >> 1;
+ u += pic->linesize[1] >> 1;
+ v += pic->linesize[2] >> 1;
+ src += aligned_width << 1;
+ }
+
+ *got_frame = 1;
+
+ return avpkt->size;
+}
+
+AVCodec ff_targa_y216_decoder = {
+ .name = "targa_y216",
+ .long_name = NULL_IF_CONFIG_SMALL("Pinnacle TARGA CineWave YUV16"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_TARGA_Y216,
+ .init = y216_decode_init,
+ .decode = y216_decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1,
+};