pnmenc: switch to encode2().

[ffmpeg] / libavcodec / targa.c

diff --git a/libavcodec/targa.c b/libavcodec/targa.c
index 3c220f408242922c2c722c075ddc63bacfa691ed..00da7587d04acd8b6c9bf5e86e68c97ef2647249 100644 (file)
--- a/libavcodec/targa.c
+++ b/libavcodec/targa.c
@@ -2,26 +2,27 @@
  * Targa (.tga) image decoder
  * Copyright (c) 2006 Konstantin Shishkov
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "libavutil/intreadwrite.h"
 #include "libavutil/imgutils.h"
 #include "avcodec.h"
+#include "bytestream.h"
 #include "targa.h"
 
 typedef struct TargaContext {
@@ -108,18 +109,18 @@ static int decode_frame(AVCodecContext *avctx,
     AVFrame * const p= (AVFrame*)&s->picture;
     uint8_t *dst;
     int stride;
-    int idlen, pal, compr, x, y, w, h, bpp, flags;
+    int idlen, compr, y, w, h, bpp, flags;
     int first_clr, colors, csize;
 
     /* parse image header */
     CHECK_BUFFER_SIZE(buf, buf_end, 18, "header");
     idlen = *buf++;
-    pal = *buf++;
+    buf++; /* pal */
     compr = *buf++;
     first_clr = AV_RL16(buf); buf += 2;
     colors = AV_RL16(buf); buf += 2;
     csize = *buf++;
-    x = AV_RL16(buf); buf += 2;
+    buf += 2; /* x */
     y = AV_RL16(buf); buf += 2;
     w = AV_RL16(buf); buf += 2;
     h = AV_RL16(buf); buf += 2;
@@ -171,35 +172,46 @@ static int decode_frame(AVCodecContext *avctx,
         stride = -p->linesize[0];
     }
 
-    if(avctx->pix_fmt == PIX_FMT_PAL8 && avctx->palctrl){
-        memcpy(p->data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
-        if(avctx->palctrl->palette_changed){
-            p->palette_has_changed = 1;
-            avctx->palctrl->palette_changed = 0;
-        }
-    }
     if(colors){
-        size_t pal_size;
+        int pal_size, pal_sample_size;
         if((colors + first_clr) > 256){
             av_log(avctx, AV_LOG_ERROR, "Incorrect palette: %i colors with offset %i\n", colors, first_clr);
             return -1;
         }
-        if(csize != 24){
+        switch (csize) {
+        case 24: pal_sample_size = 3; break;
+        case 16:
+        case 15: pal_sample_size = 2; break;
+        default:
             av_log(avctx, AV_LOG_ERROR, "Palette entry size %i bits is not supported\n", csize);
             return -1;
         }
-        pal_size = colors * ((csize + 1) >> 3);
+        pal_size = colors * pal_sample_size;
         CHECK_BUFFER_SIZE(buf, buf_end, pal_size, "color table");
         if(avctx->pix_fmt != PIX_FMT_PAL8)//should not occur but skip palette anyway
             buf += pal_size;
         else{
-            int r, g, b, t;
-            int32_t *pal = ((int32_t*)p->data[1]) + first_clr;
-            for(t = 0; t < colors; t++){
-                r = *buf++;
-                g = *buf++;
-                b = *buf++;
-                *pal++ = (b << 16) | (g << 8) | r;
+            int t;
+            uint32_t *pal = ((uint32_t *)p->data[1]) + first_clr;
+
+            switch (pal_sample_size) {
+            case 3:
+                /* RGB24 */
+                for (t = 0; t < colors; t++)
+                    *pal++ = bytestream_get_le24(&buf);
+                break;
+            case 2:
+                /* RGB555 */
+                for (t = 0; t < colors; t++) {
+                    uint32_t v = bytestream_get_le16(&buf);
+                    v = ((v & 0x7C00) <<  9) |
+                        ((v & 0x03E0) <<  6) |
+                        ((v & 0x001F) <<  3);
+                    /* left bit replication */
+                    v |= (v & 0xE0E0E0U) >> 5;
+                    *pal++ = v;
+                }
+                break;
             }
             p->palette_has_changed = 1;
         }
@@ -217,6 +229,7 @@ static int decode_frame(AVCodecContext *avctx,
             CHECK_BUFFER_SIZE(buf, buf_end, img_size, "image data");
             for(y = 0; y < s->height; y++){
 #if HAVE_BIGENDIAN
+                int x;
                 if((s->bpp + 1) >> 3 == 2){
                     uint16_t *dst16 = (uint16_t*)dst;
                     for(x = 0; x < s->width; x++)
@@ -260,15 +273,13 @@ static av_cold int targa_end(AVCodecContext *avctx){
 }
 
 AVCodec ff_targa_decoder = {
-    "targa",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_TARGA,
-    sizeof(TargaContext),
-    targa_init,
-    NULL,
-    targa_end,
-    decode_frame,
-    CODEC_CAP_DR1,
-    NULL,
+    .name           = "targa",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_TARGA,
+    .priv_data_size = sizeof(TargaContext),
+    .init           = targa_init,
+    .close          = targa_end,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("Truevision Targa image"),
 };