diff ffmpeg/libavcodec/v210x.c @ 10:6840f77b83aa

commit

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/libavcodec/v210x.c	Sun Apr 21 10:55:35 2013 +0200
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2009 Michael Niedermayer <[e-mail]>
+ *
+ * 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"
+#include "libavutil/bswap.h"
+#include "libavutil/internal.h"
+#include "libavutil/mem.h"
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+    if (avctx->width & 1) {
+        av_log(avctx, AV_LOG_ERROR, "v210x needs even width\n");
+        return AVERROR(EINVAL);
+    }
+    avctx->pix_fmt             = AV_PIX_FMT_YUV422P16;
+    avctx->bits_per_raw_sample = 10;
+
+    return 0;
+}
+
+static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+                        AVPacket *avpkt)
+{
+    const uint32_t *src = (const uint32_t *)avpkt->data;
+    AVFrame *pic        = data;
+    int width           = avctx->width;
+    int y               = 0;
+    uint16_t *ydst, *udst, *vdst, *yend;
+    int ret;
+
+    if (avpkt->size < avctx->width * avctx->height * 8 / 3) {
+        av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    if (avpkt->size > avctx->width * avctx->height * 8 / 3) {
+        avpriv_request_sample(avctx, "(Probably) padded data");
+    }
+
+    if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
+        return ret;
+
+    ydst = (uint16_t *)pic->data[0];
+    udst = (uint16_t *)pic->data[1];
+    vdst = (uint16_t *)pic->data[2];
+    yend = ydst + width;
+    pic->pict_type = AV_PICTURE_TYPE_I;
+    pic->key_frame = 1;
+
+    for (;;) {
+        uint32_t v = av_be2ne32(*src++);
+        *udst++ = (v >> 16) & 0xFFC0;
+        *ydst++ = (v >> 6 ) & 0xFFC0;
+        *vdst++ = (v << 4 ) & 0xFFC0;
+
+        v       = av_be2ne32(*src++);
+        *ydst++ = (v >> 16) & 0xFFC0;
+
+        if (ydst >= yend) {
+            ydst += pic->linesize[0] / 2 - width;
+            udst += pic->linesize[1] / 2 - width / 2;
+            vdst += pic->linesize[2] / 2 - width / 2;
+            yend = ydst + width;
+            if (++y >= avctx->height)
+                break;
+        }
+
+        *udst++ = (v >> 6 ) & 0xFFC0;
+        *ydst++ = (v << 4 ) & 0xFFC0;
+
+        v = av_be2ne32(*src++);
+        *vdst++ = (v >> 16) & 0xFFC0;
+        *ydst++ = (v >> 6 ) & 0xFFC0;
+
+        if (ydst >= yend) {
+            ydst += pic->linesize[0] / 2 - width;
+            udst += pic->linesize[1] / 2 - width / 2;
+            vdst += pic->linesize[2] / 2 - width / 2;
+            yend  = ydst + width;
+            if (++y >= avctx->height)
+                break;
+        }
+
+        *udst++ = (v << 4 ) & 0xFFC0;
+
+        v = av_be2ne32(*src++);
+        *ydst++ = (v >> 16) & 0xFFC0;
+        *vdst++ = (v >> 6 ) & 0xFFC0;
+        *ydst++ = (v << 4 ) & 0xFFC0;
+        if (ydst >= yend) {
+            ydst += pic->linesize[0] / 2 - width;
+            udst += pic->linesize[1] / 2 - width / 2;
+            vdst += pic->linesize[2] / 2 - width / 2;
+            yend  = ydst + width;
+            if (++y >= avctx->height)
+                break;
+        }
+    }
+
+    *got_frame = 1;
+
+    return avpkt->size;
+}
+
+AVCodec ff_v210x_decoder = {
+    .name           = "v210x",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_V210X,
+    .init           = decode_init,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
+};