Add Avid Meridien (AVUI) decoder.

1 files changed, 121 insertions, 0 deletions

diff --git a/libavcodec/avuidec.c b/libavcodec/avuidec.c
new file mode 100644
index 0000000000..89cf9b6960
--- /dev/null
+++ b/libavcodec/avuidec.c
@@ -0,0 +1,121 @@
+/*
+ * AVID Meridien decoder
+ *
+ * Copyright (c) 2012 Carl Eugen Hoyos
+ *
+ * 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"
+
+static av_cold int avui_decode_init(AVCodecContext *avctx)
+{
+    avctx->pix_fmt = PIX_FMT_YUVA422P;
+
+    avctx->coded_frame = avcodec_alloc_frame();
+
+    if (!avctx->coded_frame) {
+        av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
+        return AVERROR(ENOMEM);
+    }
+
+    return 0;
+}
+
+static int avui_decode_frame(AVCodecContext *avctx, void *data,
+                             int *data_size, AVPacket *avpkt)
+{
+    AVFrame *pic = avctx->coded_frame;
+    const uint8_t *src = avpkt->data;
+    const uint8_t *srca = src + 2 * (avctx->height + 16) * avctx->width + 9;
+    uint8_t *y, *u, *v, *a;
+    int transparent = 0, i, j, k;
+
+    if (pic->data[0])
+        avctx->release_buffer(avctx, pic);
+
+    if (avpkt->size < 2 * avctx->width * (avctx->height + 16) + 4) {
+        av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
+        return AVERROR(EINVAL);
+    }
+    if (avpkt->size >= 4 * avctx->width * (avctx->height + 16) + 13)
+        transparent = 1;
+
+    pic->reference = 0;
+
+    if (avctx->get_buffer(avctx, pic) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
+        return AVERROR(ENOMEM);
+    }
+
+    pic->key_frame = 1;
+    pic->pict_type = AV_PICTURE_TYPE_I;
+
+    for (i = 0; i < 2; i++) {
+        src  += avctx->width * 16;
+        srca += avctx->width * 16;
+        y = pic->data[0] + i * pic->linesize[0];
+        u = pic->data[1] + i * pic->linesize[1];
+        v = pic->data[2] + i * pic->linesize[2];
+        a = pic->data[3] + i * pic->linesize[3];
+
+        for (j = 0; j < (avctx->height + 1) >> 1; j++) {
+            for (k = 0; k < (avctx->width + 1) >> 1; k++) {
+                u[    k    ] = *src++;
+                y[2 * k    ] = *src++;
+                a[2 * k    ] = 0xFF - (transparent ? *srca++ : 0);
+                srca++;
+                v[    k    ] = *src++;
+                y[2 * k + 1] = *src++;
+                a[2 * k + 1] = 0xFF - (transparent ? *srca++ : 0);
+                srca++;
+            }
+
+            y += 2 * pic->linesize[0];
+            u += 2 * pic->linesize[1];
+            v += 2 * pic->linesize[2];
+            a += 2 * pic->linesize[3];
+        }
+        src  += 4;
+        srca += 4;
+    }
+    *data_size = sizeof(AVFrame);
+    *(AVFrame *)data = *pic;
+
+    return avpkt->size;
+}
+
+static av_cold int avui_decode_close(AVCodecContext *avctx)
+{
+    if (avctx->coded_frame->data[0])
+        avctx->release_buffer(avctx, avctx->coded_frame);
+
+    av_freep(&avctx->coded_frame);
+
+    return 0;
+}
+
+AVCodec ff_avui_decoder = {
+    .name         = "avui",
+    .type         = AVMEDIA_TYPE_VIDEO,
+    .id           = CODEC_ID_AVUI,
+    .init         = avui_decode_init,
+    .decode       = avui_decode_frame,
+    .close        = avui_decode_close,
+    .capabilities = CODEC_CAP_DR1,
+    .long_name    = NULL_IF_CONFIG_SMALL("AVID Meridien"),
+};