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, 132 insertions, 0 deletions

diff --git a/libavcodec/v210dec.c b/libavcodec/v210dec.c
new file mode 100644
index 0000000000..da23ec43b9
--- /dev/null
+++ b/libavcodec/v210dec.c
@@ -0,0 +1,132 @@
+/*
+ * V210 decoder
+ *
+ * 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 "libavutil/bswap.h"
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+    if (avctx->width & 1) {
+        av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
+        return -1;
+    }
+    if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0)
+        return -1;
+    avctx->pix_fmt = PIX_FMT_YUV422P16;
+    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 uint8_t *psrc = avpkt->data;
+    uint16_t *y, *u, *v;
+    int aligned_width = ((avctx->width + 47) / 48) * 48;
+    int stride = aligned_width * 8 / 3;
+
+    if (pic->data[0])
+        avctx->release_buffer(avctx, pic);
+
+    if (avpkt->size < stride * 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;
+
+    y = pic->data[0];
+    u = pic->data[1];
+    v = pic->data[2];
+    pic->pict_type = FF_I_TYPE;
+    pic->key_frame = 1;
+
+#define READ_PIXELS(a, b, c)       \
+    do {                           \
+        val = le2me_32(*src++);      \
+        *a++ =  val <<  6;           \
+        *b++ = (val >>  4) & 0xFFC0; \
+        *c++ = (val >> 14) & 0xFFC0; \
+    } while (0);
+
+    for (h = 0; h < avctx->height; h++) {
+        const uint32_t *src = psrc;
+        uint32_t val;
+        for (w = 0; w < avctx->width - 5; w += 6) {
+            READ_PIXELS(u, y, v);
+            READ_PIXELS(y, u, y);
+            READ_PIXELS(v, y, u);
+            READ_PIXELS(y, v, y);
+        }
+        if (w < avctx->width - 1) {
+            READ_PIXELS(u, y, v);
+
+            val  = le2me_32(*src++);
+            *y++ =  val <<  6;
+        }
+        if (w < avctx->width - 3) {
+            *u++ = (val >>  4) & 0xFFC0;
+            *y++ = (val >> 14) & 0xFFC0;
+
+            val  = le2me_32(*src++);
+            *v++ =  val <<  6;
+            *y++ = (val >>  4) & 0xFFC0;
+        }
+
+        psrc += stride;
+        y += pic->linesize[0]/2 - avctx->width;
+        u += pic->linesize[1]/2 - avctx->width/2;
+        v += pic->linesize[2]/2 - avctx->width/2;
+    }
+
+    *data_size = sizeof(AVFrame);
+    *(AVFrame*)data = *avctx->coded_frame;
+
+    return avpkt->size;
+}
+
+static av_cold int decode_close(AVCodecContext *avctx)
+{
+    av_freep(&avctx->coded_frame);
+
+    return 0;
+}
+
+AVCodec v210_decoder = {
+    "v210",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_V210,
+    0,
+    decode_init,
+    NULL,
+    decode_close,
+    decode_frame,
+    CODEC_CAP_DR1,
+    .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
+};