ffmpeg-2.1.1: move directory

git-svn-id: svn://kolibrios.org@6148 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavcodec/aasc.c

@@ -0,0 +1,162 @@
+/*
+ * Autodesk RLE Decoder
+ * Copyright (C) 2005 the ffmpeg project
+ *
+ * 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
+ * Autodesk RLE Video Decoder by Konstantin Shishkov
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "avcodec.h"
+#include "internal.h"
+#include "msrledec.h"
+
+typedef struct AascContext {
+    AVCodecContext *avctx;
+    GetByteContext gb;
+    AVFrame *frame;
+
+    uint32_t palette[AVPALETTE_COUNT];
+    int palette_size;
+} AascContext;
+
+static av_cold int aasc_decode_init(AVCodecContext *avctx)
+{
+    AascContext *s = avctx->priv_data;
+    uint8_t *ptr;
+    int i;
+
+    s->avctx = avctx;
+    switch (avctx->bits_per_coded_sample) {
+    case 8:
+        avctx->pix_fmt = AV_PIX_FMT_PAL8;
+
+        ptr = avctx->extradata;
+        s->palette_size = FFMIN(avctx->extradata_size, AVPALETTE_SIZE);
+        for (i = 0; i < s->palette_size / 4; i++) {
+            s->palette[i] = 0xFFU << 24 | AV_RL32(ptr);
+            ptr += 4;
+        }
+        break;
+    case 16:
+        avctx->pix_fmt = AV_PIX_FMT_RGB555LE;
+        break;
+    case 24:
+        avctx->pix_fmt = AV_PIX_FMT_BGR24;
+        break;
+    default:
+        av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", avctx->bits_per_coded_sample);
+        return -1;
+    }
+
+    s->frame = av_frame_alloc();
+    if (!s->frame)
+        return AVERROR(ENOMEM);
+
+    return 0;
+}
+
+static int aasc_decode_frame(AVCodecContext *avctx,
+                              void *data, int *got_frame,
+                              AVPacket *avpkt)
+{
+    const uint8_t *buf = avpkt->data;
+    int buf_size       = avpkt->size;
+    AascContext *s     = avctx->priv_data;
+    int compr, i, stride, psize, ret;
+
+    if (buf_size < 4) {
+        av_log(avctx, AV_LOG_ERROR, "frame too short\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
+        return ret;
+
+    compr     = AV_RL32(buf);
+    buf      += 4;
+    buf_size -= 4;
+    psize = avctx->bits_per_coded_sample / 8;
+    switch (avctx->codec_tag) {
+    case MKTAG('A', 'A', 'S', '4'):
+        bytestream2_init(&s->gb, buf - 4, buf_size + 4);
+        ff_msrle_decode(avctx, (AVPicture*)s->frame, 8, &s->gb);
+        break;
+    case MKTAG('A', 'A', 'S', 'C'):
+    switch (compr) {
+    case 0:
+        stride = (avctx->width * psize + psize) & ~psize;
+        if (buf_size < stride * avctx->height)
+            return AVERROR_INVALIDDATA;
+        for (i = avctx->height - 1; i >= 0; i--) {
+            memcpy(s->frame->data[0] + i * s->frame->linesize[0], buf, avctx->width * psize);
+            buf += stride;
+            buf_size -= stride;
+        }
+        break;
+    case 1:
+        bytestream2_init(&s->gb, buf, buf_size);
+        ff_msrle_decode(avctx, (AVPicture*)s->frame, 8, &s->gb);
+        break;
+    default:
+        av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
+        return AVERROR_INVALIDDATA;
+    }
+        break;
+    default:
+        av_log(avctx, AV_LOG_ERROR, "Unknown FourCC: %X\n", avctx->codec_tag);
+        return -1;
+    }
+
+    if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
+        memcpy(s->frame->data[1], s->palette, s->palette_size);
+
+    *got_frame = 1;
+    if ((ret = av_frame_ref(data, s->frame)) < 0)
+        return ret;
+
+    /* report that the buffer was completely consumed */
+    return buf_size;
+}
+
+static av_cold int aasc_decode_end(AVCodecContext *avctx)
+{
+    AascContext *s = avctx->priv_data;
+
+    av_frame_free(&s->frame);
+
+    return 0;
+}
+
+AVCodec ff_aasc_decoder = {
+    .name           = "aasc",
+    .long_name      = NULL_IF_CONFIG_SMALL("Autodesk RLE"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_AASC,
+    .priv_data_size = sizeof(AascContext),
+    .init           = aasc_decode_init,
+    .close          = aasc_decode_end,
+    .decode         = aasc_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+};