libutvideo: Add Ut Video Decoder Wrapper

Add a wrapper for libutvideo's decoder.

This supports decoding the following FOURCCs:
    ULY0 - 4:2:0 YCbCr
    ULY2 - 4:2:2 YCbCr
    ULRG - RGB
    ULRA - RGBA

Also, bump version.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 230 insertions, 0 deletions

diff --git a/libavcodec/libutvideo.cpp b/libavcodec/libutvideo.cpp
new file mode 100644
index 0000000000..27f22e8570
--- /dev/null
+++ b/libavcodec/libutvideo.cpp
@@ -0,0 +1,230 @@
+/*
+ * Copyright (c) 2011 Derek Buitenhuis
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation;
+ * version 2 of the License.
+ *
+ * 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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
+ */
+
+/**
+ * @file
+ * Known FOURCCs:
+ *     'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA)
+ */
+
+extern "C" {
+#include "avcodec.h"
+}
+
+#include <stdlib.h>
+#include <utvideo/utvideo.h>
+#include <utvideo/Codec.h>
+
+#include "get_bits.h"
+
+typedef struct {
+    uint32_t version;
+    uint32_t original_format;
+    uint32_t stripes;
+    uint32_t flags;
+} UtVideoExtra;
+
+typedef struct {
+    CCodec *codec;
+    unsigned int buf_size;
+    uint8_t *output;
+} UtVideoContext;
+
+static av_cold int utvideo_decode_init(AVCodecContext *avctx)
+{
+    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
+    UtVideoExtra info;
+    int defined_fourcc = 0;
+
+    if(avctx->extradata_size != 4*4)
+    {
+        av_log(avctx, AV_LOG_ERROR, "Extradata size mismatch.\n");
+        return -1;
+    }
+
+    /* Read extradata */
+    info.version = AV_RL32(avctx->extradata);
+    info.original_format = AV_RL32(avctx->extradata + 4);
+    info.stripes = AV_RL32(avctx->extradata + 8);
+    info.flags = AV_RL32(avctx->extradata + 12);
+
+    /* Try to output the original format */
+    switch(UNFCC(info.original_format))
+    {
+        case UTVF_YV12:
+            avctx->pix_fmt = PIX_FMT_YUV420P;
+            break;
+        case UTVF_YUY2:
+        case UTVF_YUYV:
+        case UTVF_YUNV:
+            avctx->pix_fmt = PIX_FMT_YUYV422;
+            break;
+        case UTVF_UYVY:
+        case UTVF_UYNV:
+            avctx->pix_fmt = PIX_FMT_UYVY422;
+            break;
+        case UTVF_RGB24_WIN:
+            avctx->pix_fmt = PIX_FMT_BGR24;
+            break;
+        case UTVF_RGB32_WIN:
+            avctx->pix_fmt = PIX_FMT_RGB32;
+            break;
+        case UTVF_ARGB32_WIN:
+            avctx->pix_fmt = PIX_FMT_ARGB;
+            break;
+        case 0:
+            /* Fall back on FOURCC */
+            switch(UNFCC(avctx->codec_tag))
+            {
+                case UTVF_ULY0:
+                    avctx->pix_fmt = PIX_FMT_YUV420P;
+                    defined_fourcc = UTVF_YV12;
+                    break;
+                case UTVF_ULY2:
+                    avctx->pix_fmt = PIX_FMT_YUYV422;
+                    defined_fourcc = UTVF_YUY2;
+                    break;
+                case UTVF_ULRG:
+                    avctx->pix_fmt = PIX_FMT_BGR24;
+                    defined_fourcc = UTVF_RGB24_WIN;
+                    break;
+                case UTVF_ULRA:
+                    avctx->pix_fmt = PIX_FMT_RGB32;
+                    defined_fourcc = UTVF_RGB32_WIN;
+                    break;
+            }
+            break;
+        default:
+            av_log(avctx, AV_LOG_ERROR,
+                  "Codec ExtraData is Corrupt or Invalid: %X\n", info.original_format);
+            return -1;
+    }
+
+    /* Only allocate the buffer once */
+    utv->buf_size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
+    utv->output = (uint8_t *)av_malloc(utv->buf_size * sizeof(uint8_t));
+
+    if(utv->output == NULL)
+    {
+        av_log(avctx, AV_LOG_ERROR, "Unable to allocate output buffer.\n");
+        return -1;
+    }
+
+    /* Allocate the output frame  */
+    avctx->coded_frame = avcodec_alloc_frame();
+
+    /* Ut Video only supports 8-bit */
+    avctx->bits_per_raw_sample = 8;
+
+    /* Is it interlaced? */
+    avctx->coded_frame->interlaced_frame = info.flags & 0x800 ? 1 : 0;
+
+    /* Apparently Ut Video doesn't store this info... */
+    avctx->coded_frame->top_field_first = 1;
+
+    /*
+     * Create a Ut Video instance. Since the function wants
+     * an "interface name" string, pass it the name of the lib.
+     */
+    utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");
+
+    /* Initialize Decoding */
+    utv->codec->DecodeBegin(defined_fourcc ? defined_fourcc : UNFCC(info.original_format),
+                            avctx->width, avctx->height, CBGROSSWIDTH_WINDOWS, &info,
+                            sizeof(UtVideoExtra));
+
+    return 0;
+}
+
+static int utvideo_decode_frame(AVCodecContext *avctx, void *data,
+                                int *data_size, AVPacket *avpkt)
+{
+    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
+    AVFrame *pic = avctx->coded_frame;
+    unsigned int w = avctx->width, h = avctx->height;
+
+    /* Set flags */
+    pic->reference = 0;
+    pic->pict_type = AV_PICTURE_TYPE_I;
+    pic->key_frame = 1;
+
+    /* Decode the frame */
+    utv->codec->DecodeFrame(utv->output, avpkt->data, true);
+
+    /* Set the output data depending on the colorspace */
+    switch(avctx->pix_fmt)
+    {
+        case PIX_FMT_YUV420P:
+            pic->linesize[0] = w;
+            pic->linesize[1] = pic->linesize[2] = w / 2;
+            pic->data[0] = utv->output;
+            pic->data[2] = utv->output + (w * h);
+            pic->data[1] = pic->data[2] + (w * h / 4);
+            break;
+        case PIX_FMT_YUYV422:
+        case PIX_FMT_UYVY422:
+            pic->linesize[0] = w * 2;
+            pic->data[0] = utv->output;
+            break;
+        case PIX_FMT_BGR24:
+        case PIX_FMT_RGB32:
+            /* Make the linesize negative, since Ut Video uses bottom-up BGR */
+            pic->linesize[0] = -1 * w * (avctx->pix_fmt == PIX_FMT_BGR24 ? 3 : 4);
+            pic->data[0] = utv->output + utv->buf_size + pic->linesize[0];
+            break;
+     }
+
+    *data_size = sizeof(AVFrame);
+    *(AVFrame *)data = *pic;
+
+    return avpkt->size;
+}
+
+static av_cold int utvideo_decode_close(AVCodecContext *avctx)
+{
+    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
+
+    /* Free output */
+    av_freep(&avctx->coded_frame);
+    av_freep(&utv->output);
+
+    /* Finish decoding and clean up the instance */
+    utv->codec->DecodeEnd();
+    CCodec::DeleteInstance(utv->codec);
+
+    return 0;
+}
+
+AVCodec ff_libutvideo_decoder = {
+    "utvideo",
+    AVMEDIA_TYPE_VIDEO,
+    CODEC_ID_UTVIDEO,
+    sizeof(UtVideoContext),
+    utvideo_decode_init,
+    NULL,
+    utvideo_decode_close,
+    utvideo_decode_frame,
+    CODEC_CAP_LOSSLESS,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL_IF_CONFIG_SMALL("Ut Video"),
+};