cljr: split decoder and encoder

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

1 files changed, 97 insertions, 0 deletions

diff --git a/libavcodec/cljrenc.c b/libavcodec/cljrenc.c
new file mode 100644
index 0000000000..2c315555e6
--- /dev/null
+++ b/libavcodec/cljrenc.c
@@ -0,0 +1,97 @@
+/*
+ * Cirrus Logic AccuPak (CLJR) encoder
+ * 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 encoder.
+ */
+
+#include "libavutil/common.h"
+
+#include "avcodec.h"
+#include "internal.h"
+#include "put_bits.h"
+
+static av_cold int encode_init(AVCodecContext *avctx)
+{
+    avctx->coded_frame = av_frame_alloc();
+    if (!avctx->coded_frame)
+        return AVERROR(ENOMEM);
+
+    return 0;
+}
+
+static av_cold int encode_close(AVCodecContext *avctx)
+{
+    av_frame_free(&avctx->coded_frame);
+    return 0;
+}
+
+static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                        const AVFrame *p, int *got_packet)
+{
+    PutBitContext pb;
+    int x, y, ret;
+
+    if ((ret = ff_alloc_packet(pkt, 32*avctx->height*avctx->width/4)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
+        return ret;
+    }
+
+    avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+    avctx->coded_frame->key_frame = 1;
+
+    init_put_bits(&pb, pkt->data, pkt->size);
+
+    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) {
+            put_bits(&pb, 5, luma[3] >> 3);
+            put_bits(&pb, 5, luma[2] >> 3);
+            put_bits(&pb, 5, luma[1] >> 3);
+            put_bits(&pb, 5, luma[0] >> 3);
+            luma += 4;
+            put_bits(&pb, 6, *(cb++) >> 2);
+            put_bits(&pb, 6, *(cr++) >> 2);
+        }
+    }
+
+    flush_put_bits(&pb);
+
+    pkt->size   = put_bits_count(&pb) / 8;
+    pkt->flags |= AV_PKT_FLAG_KEY;
+    *got_packet = 1;
+    return 0;
+}
+
+AVCodec ff_cljr_encoder = {
+    .name           = "cljr",
+    .long_name      = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_CLJR,
+    .init           = encode_init,
+    .encode2        = encode_frame,
+    .close          = encode_close,
+    .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
+                                                   AV_PIX_FMT_NONE },
+};