patched ffmpeg nov 2

source/patched-ffmpeg-mt/libavcodec/targaenc.c

Index: source/patched-ffmpeg-mt/libavcodec/targaenc.c
===================================================================
--- source/patched-ffmpeg-mt/libavcodec/targaenc.c	(revision 65184)
+++ source/patched-ffmpeg-mt/libavcodec/targaenc.c	(working copy)
@@ -22,6 +22,7 @@
 #include "libavutil/intreadwrite.h"
 #include "avcodec.h"
 #include "rle.h"
+#include "targa.h"
 
 typedef struct TargaContext {
     AVFrame picture;
@@ -81,12 +82,12 @@
 
     if(avctx->width > 0xffff || avctx->height > 0xffff) {
         av_log(avctx, AV_LOG_ERROR, "image dimensions too large\n");
-        return -1;
+        return AVERROR(EINVAL);
     }
     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;
+        return AVERROR(EINVAL);
     }
 
     p->pict_type= FF_I_TYPE;
@@ -96,24 +97,30 @@
     memset(outbuf, 0, 12);
     AV_WL16(outbuf+12, avctx->width);
     AV_WL16(outbuf+14, avctx->height);
-    outbuf[17] = 0x20;           /* origin is top-left. no alpha */
+    /* image descriptor byte: origin is always top-left, bits 0-3 specify alpha */
+    outbuf[17] = 0x20 | (avctx->pix_fmt == PIX_FMT_BGRA ? 8 : 0);
 
-    /* TODO: support alpha channel */
     switch(avctx->pix_fmt) {
     case PIX_FMT_GRAY8:
-        outbuf[2] = 3;           /* uncompressed grayscale image */
+        outbuf[2] = TGA_BW;      /* uncompressed grayscale image */
         outbuf[16] = 8;          /* bpp */
         break;
     case PIX_FMT_RGB555LE:
-        outbuf[2] = 2;           /* uncompresses true-color image */
+        outbuf[2] = TGA_RGB;     /* uncompresses true-color image */
         outbuf[16] = 16;         /* bpp */
         break;
     case PIX_FMT_BGR24:
-        outbuf[2] = 2;           /* uncompressed true-color image */
+        outbuf[2] = TGA_RGB;     /* uncompressed true-color image */
         outbuf[16] = 24;         /* bpp */
         break;
+    case PIX_FMT_BGRA:
+        outbuf[2] = TGA_RGB;     /* uncompressed true-color image */
+        outbuf[16] = 32;         /* bpp */
+        break;
     default:
-        return -1;
+        av_log(avctx, AV_LOG_ERROR, "Pixel format '%s' not supported.\n",
+               avcodec_get_pix_fmt_name(avctx->pix_fmt));
+        return AVERROR(EINVAL);
     }
     bpp = outbuf[16] >> 3;
 
@@ -158,6 +165,6 @@
     .priv_data_size = sizeof(TargaContext),
     .init = targa_encode_init,
     .encode = targa_encode_frame,
-    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_RGB555LE, PIX_FMT_GRAY8, PIX_FMT_NONE},
+    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_BGRA, PIX_FMT_RGB555LE, PIX_FMT_GRAY8, PIX_FMT_NONE},
     .long_name= NULL_IF_CONFIG_SMALL("Truevision Targa image"),
 };