making act segmenter

1 files changed, 190 insertions, 0 deletions

diff --git a/ffmpeg/libavcodec/cljr.c b/ffmpeg/libavcodec/cljr.c
new file mode 100644
index 0000000..2120864
--- /dev/null
+++ b/ffmpeg/libavcodec/cljr.c
@@ -0,0 +1,190 @@
+/*
+ * Cirrus Logic AccuPak (CLJR) codec
+ * Copyright (c) 2003 Alex Beregszaszi
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * Cirrus Logic AccuPak codec.
+ */
+
+#include "avcodec.h"
+#include "libavutil/opt.h"
+#include "get_bits.h"
+#include "internal.h"
+#include "put_bits.h"
+
+#if CONFIG_CLJR_DECODER
+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)
+        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)*33) >> 2;
+            luma[2] = (get_bits(&gb, 5)*33) >> 2;
+            luma[1] = (get_bits(&gb, 5)*33) >> 2;
+            luma[0] = (get_bits(&gb, 5)*33) >> 2;
+            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",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_CLJR,
+    .init           = decode_init,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
+};
+#endif
+
+#if CONFIG_CLJR_ENCODER
+typedef struct CLJRContext {
+    AVClass        *avclass;
+    AVFrame         picture;
+    int             dither_type;
+} CLJRContext;
+
+static av_cold int encode_init(AVCodecContext *avctx)
+{
+    CLJRContext * const a = avctx->priv_data;
+
+    avctx->coded_frame = &a->picture;
+
+    return 0;
+}
+
+static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                        const AVFrame *p, int *got_packet)
+{
+    CLJRContext *a = avctx->priv_data;
+    PutBitContext pb;
+    int x, y, ret;
+    uint32_t dither= avctx->frame_number;
+    static const uint32_t ordered_dither[2][2] =
+    {
+        { 0x10400000, 0x104F0000 },
+        { 0xCB2A0000, 0xCB250000 },
+    };
+
+    if ((ret = ff_alloc_packet2(avctx, pkt, 32*avctx->height*avctx->width/4)) < 0)
+        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) {
+            switch (a->dither_type) {
+            case 0: dither = 0x492A0000;                       break;
+            case 1: dither = dither * 1664525 + 1013904223;    break;
+            case 2: dither = ordered_dither[ y&1 ][ (x>>2)&1 ];break;
+            }
+            put_bits(&pb, 5, (249*(luma[3] +  (dither>>29)   )) >> 11);
+            put_bits(&pb, 5, (249*(luma[2] + ((dither>>26)&7))) >> 11);
+            put_bits(&pb, 5, (249*(luma[1] + ((dither>>23)&7))) >> 11);
+            put_bits(&pb, 5, (249*(luma[0] + ((dither>>20)&7))) >> 11);
+            luma += 4;
+            put_bits(&pb, 6, (253*(*(cb++) + ((dither>>18)&3))) >> 10);
+            put_bits(&pb, 6, (253*(*(cr++) + ((dither>>16)&3))) >> 10);
+        }
+    }
+
+    flush_put_bits(&pb);
+
+    pkt->size   = put_bits_count(&pb) / 8;
+    pkt->flags |= AV_PKT_FLAG_KEY;
+    *got_packet = 1;
+    return 0;
+}
+
+#define OFFSET(x) offsetof(CLJRContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "dither_type",   "Dither type",   OFFSET(dither_type),        AV_OPT_TYPE_INT, { .i64=1 }, 0, 2, VE},
+    { NULL },
+};
+
+static const AVClass class = {
+    .class_name = "cljr encoder",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVCodec ff_cljr_encoder = {
+    .name           = "cljr",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_CLJR,
+    .priv_data_size = sizeof(CLJRContext),
+    .init           = encode_init,
+    .encode2        = encode_frame,
+    .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
+                                                   AV_PIX_FMT_NONE },
+    .long_name      = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
+    .priv_class     = &class,
+};
+#endif