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/ptx.c

@@ -0,0 +1,93 @@
+/*
+ * V.Flash PTX (.ptx) image decoder
+ * Copyright (c) 2007 Ivo van Poorten
+ *
+ * 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 "libavutil/common.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/imgutils.h"
+#include "avcodec.h"
+#include "internal.h"
+
+static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+                            AVPacket *avpkt) {
+    const uint8_t *buf = avpkt->data;
+    const uint8_t *buf_end = avpkt->data + avpkt->size;
+    AVFrame * const p = data;
+    unsigned int offset, w, h, y, stride, bytes_per_pixel;
+    int ret;
+    uint8_t *ptr;
+
+    if (buf_end - buf < 14)
+        return AVERROR_INVALIDDATA;
+    offset          = AV_RL16(buf);
+    w               = AV_RL16(buf+8);
+    h               = AV_RL16(buf+10);
+    bytes_per_pixel = AV_RL16(buf+12) >> 3;
+
+    if (bytes_per_pixel != 2) {
+        avpriv_request_sample(avctx, "Image format not RGB15");
+        return AVERROR_PATCHWELCOME;
+    }
+
+    avctx->pix_fmt = AV_PIX_FMT_BGR555LE;
+
+    if (buf_end - buf < offset)
+        return AVERROR_INVALIDDATA;
+    if (offset != 0x2c)
+        avpriv_request_sample(avctx, "offset != 0x2c");
+
+    buf += offset;
+
+    if ((ret = av_image_check_size(w, h, 0, avctx)) < 0)
+        return ret;
+    if (w != avctx->width || h != avctx->height)
+        avcodec_set_dimensions(avctx, w, h);
+    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
+        return ret;
+
+    p->pict_type = AV_PICTURE_TYPE_I;
+
+    ptr    = p->data[0];
+    stride = p->linesize[0];
+
+    for (y = 0; y < h && buf_end - buf >= w * bytes_per_pixel; y++) {
+        memcpy(ptr, buf, w*bytes_per_pixel);
+        ptr += stride;
+        buf += w*bytes_per_pixel;
+    }
+
+    *got_frame = 1;
+
+    if (y < h) {
+        av_log(avctx, AV_LOG_WARNING, "incomplete packet\n");
+        return avpkt->size;
+    }
+
+    return offset + w*h*bytes_per_pixel;
+}
+
+AVCodec ff_ptx_decoder = {
+    .name           = "ptx",
+    .long_name      = NULL_IF_CONFIG_SMALL("V.Flash PTX image"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_PTX,
+    .decode         = ptx_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+};