1 files changed, 149 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/targaenc.c b/contrib/ffmpeg/libavcodec/targaenc.c
new file mode 100644
index 000000000..47e33b19e
--- /dev/null
+++ b/contrib/ffmpeg/libavcodec/targaenc.c
@@ -0,0 +1,149 @@
+/*
+ * Targa (.tga) image encoder
+ * Copyright (c) 2007 Bobby Bingham
+ *
+ * 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 "avcodec.h"
+#include "rle.h"
+
+/**
+ * RLE compress the image, with maximum size of out_size
+ * @param outbuf Output buffer
+ * @param out_size Maximum output size
+ * @param pic Image to compress
+ * @param bpp Bytes per pixel
+ * @param w Image width
+ * @param h Image height
+ * @return Size of output in bytes, or -1 if larger than out_size
+ */
+static int targa_encode_rle(uint8_t *outbuf, int out_size, AVFrame *pic,
+                            int bpp, int w, int h)
+{
+    int y,ret;
+    uint8_t *out;
+
+    out = outbuf;
+
+    for(y = 0; y < h; y ++) {
+        ret = ff_rle_encode(out, out_size, pic->data[0] + pic->linesize[0] * y, bpp, w, 0x7f, 0, -1, 0);
+        if(ret == -1){
+            return -1;
+        }
+        out+= ret;
+        out_size -= ret;
+    }
+
+    return out - outbuf;
+}
+
+static int targa_encode_normal(uint8_t *outbuf, AVFrame *pic, int bpp, int w, int h)
+{
+    int i, n = bpp * w;
+    uint8_t *out = outbuf;
+    uint8_t *ptr = pic->data[0];
+
+    for(i=0; i < h; i++) {
+        memcpy(out, ptr, n);
+        out += n;
+        ptr += pic->linesize[0];
+    }
+
+    return out - outbuf;
+}
+
+static int targa_encode_frame(AVCodecContext *avctx,
+                              unsigned char *outbuf,
+                              int buf_size, void *data){
+    AVFrame *p = data;
+    int bpp, picsize, datasize;
+    uint8_t *out;
+
+    if(avctx->width > 0xffff || avctx->height > 0xffff) {
+        av_log(avctx, AV_LOG_ERROR, "image dimensions too large\n");
+        return -1;
+    }
+    picsize = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
+    if(buf_size < picsize + 45) {
+        av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
+        return -1;
+    }
+
+    p->pict_type= FF_I_TYPE;
+    p->key_frame= 1;
+
+    /* zero out the header and only set applicable fields */
+    memset(outbuf, 0, 11);
+    AV_WL16(outbuf+12, avctx->width);
+    AV_WL16(outbuf+14, avctx->height);
+    outbuf[17] = 0x20;           /* origin is top-left. no alpha */
+
+    /* TODO: support alpha channel */
+    switch(avctx->pix_fmt) {
+    case PIX_FMT_GRAY8:
+        outbuf[2] = 3;           /* uncompressed grayscale image */
+        outbuf[16] = 8;          /* bpp */
+        break;
+    case PIX_FMT_RGB555:
+        outbuf[2] = 2;           /* uncompresses true-color image */
+        outbuf[16] = 16;         /* bpp */
+        break;
+    case PIX_FMT_BGR24:
+        outbuf[2] = 2;           /* uncompressed true-color image */
+        outbuf[16] = 24;         /* bpp */
+        break;
+    default:
+        return -1;
+    }
+    bpp = outbuf[16] >> 3;
+
+    out = outbuf + 18;  /* skip past the header we just output */
+
+    /* try RLE compression */
+    datasize = targa_encode_rle(out, picsize, p, bpp, avctx->width, avctx->height);
+
+    /* if that worked well, mark the picture as RLE compressed */
+    if(datasize >= 0)
+        outbuf[2] |= 8;
+
+    /* if RLE didn't make it smaller, go back to no compression */
+    else datasize = targa_encode_normal(out, p, bpp, avctx->width, avctx->height);
+
+    out += datasize;
+
+    /* The standard recommends including this section, even if we don't use
+     * any of the features it affords. TODO: take advantage of the pixel
+     * aspect ratio and encoder ID fields available? */
+    memcpy(out, "\0\0\0\0\0\0\0\0TRUEVISION-XFILE.", 26);
+
+    return out + 26 - outbuf;
+}
+
+static int targa_encode_init(AVCodecContext *avctx)
+{
+    return 0;
+}
+
+AVCodec targa_encoder = {
+    .name = "targa",
+    .type = CODEC_TYPE_VIDEO,
+    .id = CODEC_ID_TARGA,
+    .priv_data_size = 0,
+    .init = targa_encode_init,
+    .encode = targa_encode_frame,
+    .pix_fmts= (enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_RGB555, PIX_FMT_GRAY8, -1},
+};