V210 Uncompressed 4:2:2 10-bit encoder and decoder

Originally committed as revision 18801 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 129 insertions, 0 deletions

diff --git a/libavcodec/v210enc.c b/libavcodec/v210enc.c
new file mode 100644
index 0000000000..8bbd720918
--- /dev/null
+++ b/libavcodec/v210enc.c
@@ -0,0 +1,129 @@
+/*
+ * V210 encoder
+ *
+ * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
+ *
+ * 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 "libavcodec/bytestream.h"
+
+static av_cold int encode_init(AVCodecContext *avctx)
+{
+    if (avctx->width & 1) {
+        av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
+        return -1;
+    }
+
+    if (avctx->pix_fmt != PIX_FMT_YUV422P16) {
+        av_log(avctx, AV_LOG_ERROR, "v210 needs YUV422P16\n");
+        return -1;
+    }
+
+    if (avctx->bits_per_raw_sample != 10)
+        av_log(avctx, AV_LOG_WARNING, "bits per raw sample: %d != 10-bit\n",
+               avctx->bits_per_raw_sample);
+
+    avctx->coded_frame = avcodec_alloc_frame();
+
+    avctx->coded_frame->key_frame = 1;
+    avctx->coded_frame->pict_type = FF_I_TYPE;
+
+    return 0;
+}
+
+static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data)
+{
+    const AVFrame *pic = data;
+    int aligned_width = ((avctx->width + 47) / 48) * 48;
+    int stride = aligned_width * 8 / 3;
+    int h, w;
+    const uint16_t *y = pic->data[0];
+    const uint16_t *u = pic->data[1];
+    const uint16_t *v = pic->data[2];
+    uint8_t *p = buf;
+    uint8_t *pdst = buf;
+
+    if (buf_size < aligned_width * avctx->height * 8 / 3) {
+        av_log(avctx, AV_LOG_ERROR, "output buffer too small\n");
+        return -1;
+    }
+
+#define WRITE_PIXELS(a, b, c)           \
+    do {                                \
+        val =  (*a++           >>  6) | \
+              ((*b++ & 0xFFC0) <<  4);  \
+        val|=  (*c++ & 0xFFC0) << 14;   \
+        bytestream_put_le32(&p, val);   \
+    } while (0);
+
+    for (h = 0; h < avctx->height; h++) {
+        uint32_t val;
+        for (w = 0; w < avctx->width - 5; w += 6) {
+            WRITE_PIXELS(u, y, v);
+            WRITE_PIXELS(y, u, y);
+            WRITE_PIXELS(v, y, u);
+            WRITE_PIXELS(y, v, y);
+        }
+        if (w < avctx->width - 1) {
+            WRITE_PIXELS(u, y, v);
+
+            val =   *y++           >>  6;
+            if (w == avctx->width - 2)
+                bytestream_put_le32(&p, val);
+        }
+        if (w < avctx->width - 3) {
+            val |=((*u++ & 0xFFC0) <<  4) |
+                  ((*y++ & 0xFFC0) << 14);
+            bytestream_put_le32(&p, val);
+
+            val =  (*v++           >>  6) |
+                   (*y++ & 0xFFC0) <<  4;
+            bytestream_put_le32(&p, val);
+        }
+
+        pdst += stride;
+        memset(p, 0, pdst - p);
+        p = pdst;
+        y += pic->linesize[0]/2 - avctx->width;
+        u += pic->linesize[1]/2 - avctx->width/2;
+        v += pic->linesize[2]/2 - avctx->width/2;
+    }
+
+    return p - buf;
+}
+
+static av_cold int encode_close(AVCodecContext *avctx)
+{
+    av_freep(&avctx->coded_frame);
+
+    return 0;
+}
+
+AVCodec v210_encoder = {
+    "v210",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_V210,
+    0,
+    encode_init,
+    encode_frame,
+    encode_close,
+    .pix_fmts = (enum PixelFormat[]){PIX_FMT_YUV422P16, -1},
+    .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
+};