From 4aaab0a328b671f91a6cd195ef98f0d5592c5e4a Mon Sep 17 00:00:00 2001
From: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Date: Thu, 17 Dec 2009 18:56:56 +0000
Subject: Add decoder for R210 (uncompressed 10-bit RGB) codec.

Originally committed as revision 20891 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/r210dec.c | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 libavcodec/r210dec.c

(limited to 'libavcodec/r210dec.c')

diff --git a/libavcodec/r210dec.c b/libavcodec/r210dec.c
new file mode 100644
index 0000000000..94edb169ae
--- /dev/null
+++ b/libavcodec/r210dec.c
@@ -0,0 +1,104 @@
+/*
+ * R210 decoder
+ *
+ * Copyright (c) 2009 Reimar Doeffinger <Reimar.Doeffinger@gmx.de>
+ *
+ * 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 "libavutil/bswap.h"
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+    avctx->pix_fmt             = PIX_FMT_RGB48;
+    avctx->bits_per_raw_sample = 10;
+
+    avctx->coded_frame         = avcodec_alloc_frame();
+
+    return 0;
+}
+
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
+                        AVPacket *avpkt)
+{
+    int h, w;
+    AVFrame *pic = avctx->coded_frame;
+    const uint32_t *src = (const uint32_t *)avpkt->data;
+    int aligned_width = FFALIGN(avctx->width, 64);
+    uint8_t *dst_line;
+
+    if (pic->data[0])
+        avctx->release_buffer(avctx, pic);
+
+    if (avpkt->size < 4 * aligned_width * avctx->height) {
+        av_log(avctx, AV_LOG_ERROR, "packet too small\n");
+        return -1;
+    }
+
+    pic->reference = 0;
+    if (avctx->get_buffer(avctx, pic) < 0)
+        return -1;
+
+    pic->pict_type = FF_I_TYPE;
+    pic->key_frame = 1;
+    dst_line = pic->data[0];
+
+    for (h = 0; h < avctx->height; h++) {
+        uint16_t *dst = (uint16_t *)dst_line;
+        for (w = 0; w < avctx->width; w++) {
+            uint32_t pixel = be2me_32(*src++);
+            uint16_t r, g, b;
+            r =  pixel <<  6;
+            g = (pixel >>  4) & 0xffc0;
+            b = (pixel >> 14) & 0xffc0;
+            *dst++ = r | (r >> 10);
+            *dst++ = g | (g >> 10);
+            *dst++ = b | (b >> 10);
+        }
+        src += aligned_width - avctx->width;
+        dst_line += pic->linesize[0];
+    }
+
+    *data_size = sizeof(AVFrame);
+    *(AVFrame*)data = *avctx->coded_frame;
+
+    return avpkt->size;
+}
+
+static av_cold int decode_close(AVCodecContext *avctx)
+{
+    AVFrame *pic = avctx->coded_frame;
+    if (pic->data[0])
+        avctx->release_buffer(avctx, pic);
+    av_freep(&avctx->coded_frame);
+
+    return 0;
+}
+
+AVCodec r210_decoder = {
+    "r210",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_R210,
+    0,
+    decode_init,
+    NULL,
+    decode_close,
+    decode_frame,
+    CODEC_CAP_DR1,
+    .long_name = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
+};
-- 
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