cljr: split decoder and encoder

Signed-off-by: Diego Biurrun <diego@biurrun.de>

1 files changed, 95 insertions, 0 deletions

diff --git a/libavcodec/cljrdec.c b/libavcodec/cljrdec.c
new file mode 100644
index 0000000000..e74d1fafa4
--- /dev/null
+++ b/libavcodec/cljrdec.c
@@ -0,0 +1,95 @@
+/*
+ * Cirrus Logic AccuPak (CLJR) decoder
+ * Copyright (c) 2003 Alex Beregszaszi
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Cirrus Logic AccuPak decoder.
+ */
+
+#include "avcodec.h"
+#include "get_bits.h"
+#include "internal.h"
+
+static int decode_frame(AVCodecContext *avctx,
+                        void *data, int *got_frame,
+                        AVPacket *avpkt)
+{
+    const uint8_t *buf = avpkt->data;
+    int buf_size       = avpkt->size;
+    GetBitContext gb;
+    AVFrame * const p = data;
+    int x, y, ret;
+
+    if (avctx->height <= 0 || avctx->width <= 0) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid width or height\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    if (buf_size < avctx->height * avctx->width) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Resolution larger than buffer size. Invalid header?\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return ret;
+    }
+    p->pict_type = AV_PICTURE_TYPE_I;
+    p->key_frame = 1;
+
+    init_get_bits(&gb, buf, buf_size * 8);
+
+    for (y = 0; y < avctx->height; y++) {
+        uint8_t *luma = &p->data[0][y * p->linesize[0]];
+        uint8_t *cb   = &p->data[1][y * p->linesize[1]];
+        uint8_t *cr   = &p->data[2][y * p->linesize[2]];
+        for (x = 0; x < avctx->width; x += 4) {
+            luma[3] = get_bits(&gb, 5) << 3;
+            luma[2] = get_bits(&gb, 5) << 3;
+            luma[1] = get_bits(&gb, 5) << 3;
+            luma[0] = get_bits(&gb, 5) << 3;
+            luma += 4;
+            *(cb++) = get_bits(&gb, 6) << 2;
+            *(cr++) = get_bits(&gb, 6) << 2;
+        }
+    }
+
+    *got_frame = 1;
+
+    return buf_size;
+}
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+    avctx->pix_fmt = AV_PIX_FMT_YUV411P;
+    return 0;
+}
+
+AVCodec ff_cljr_decoder = {
+    .name           = "cljr",
+    .long_name      = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_CLJR,
+    .init           = decode_init,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+};