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authorGravatar rtognimp <rtognimp@b3059339-0415-0410-9bf9-f77b7e298cf2>2003-01-26 22:05:18 +0000
committerGravatar rtognimp <rtognimp@b3059339-0415-0410-9bf9-f77b7e298cf2>2003-01-26 22:05:18 +0000
commit461871fc5bf0bc57bafcba29f87e4dec2b621931 (patch)
treeb12dbdb045a7cdc5265f01d08121c76decdf23ee /libmpcodecs/native
parente81abce2d7e6fdb56739eae39fd362f4b5eb9645 (diff)
Quicktime rle 32 bit supported
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9115 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpcodecs/native')
-rw-r--r--libmpcodecs/native/qtrle.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/libmpcodecs/native/qtrle.c b/libmpcodecs/native/qtrle.c
index 23d761c038..e6a44f8009 100644
--- a/libmpcodecs/native/qtrle.c
+++ b/libmpcodecs/native/qtrle.c
@@ -3,6 +3,7 @@
(C) 2001 Mike Melanson
8 and 16bpp support by Alex Beregszaszi
+ 32 bpp support by Roberto Togni
*/
#include "config.h"
@@ -258,6 +259,96 @@ void qt_decode_rle24(
}
}
+void qt_decode_rle32(
+ unsigned char *encoded,
+ int encoded_size,
+ unsigned char *decoded,
+ int width,
+ int height,
+ int bytes_per_pixel)
+{
+ int stream_ptr;
+ int header;
+ int start_line;
+ int lines_to_change;
+ signed char rle_code;
+ int row_ptr, pixel_ptr;
+ int row_inc = bytes_per_pixel * width;
+ unsigned char r, g, b;
+
+ // check if this frame is even supposed to change
+ if (encoded_size < 8)
+ return;
+
+ // start after the chunk size
+ stream_ptr = 4;
+
+ // fetch the header
+ header = BE_16(&encoded[stream_ptr]);
+ stream_ptr += 2;
+
+ // if a header is present, fetch additional decoding parameters
+ if (header & 0x0008)
+ {
+ start_line = BE_16(&encoded[stream_ptr]);
+ stream_ptr += 4;
+ lines_to_change = BE_16(&encoded[stream_ptr]);
+ stream_ptr += 4;
+ }
+ else
+ {
+ start_line = 0;
+ lines_to_change = height;
+ }
+
+ row_ptr = row_inc * start_line;
+ while (lines_to_change--)
+ {
+ pixel_ptr = row_ptr + ((encoded[stream_ptr++] - 1) * bytes_per_pixel);
+
+ while (stream_ptr < encoded_size &&
+ (rle_code = (signed char)encoded[stream_ptr++]) != -1)
+ {
+ if (rle_code == 0)
+ // there's another skip code in the stream
+ pixel_ptr += ((encoded[stream_ptr++] - 1) * bytes_per_pixel);
+ else if (rle_code < 0)
+ {
+ // decode the run length code
+ rle_code = -rle_code;
+ stream_ptr++; // Ignore alpha channel
+ r = encoded[stream_ptr++];
+ g = encoded[stream_ptr++];
+ b = encoded[stream_ptr++];
+ while (rle_code--)
+ {
+ decoded[pixel_ptr++] = b;
+ decoded[pixel_ptr++] = g;
+ decoded[pixel_ptr++] = r;
+ if (bytes_per_pixel == 4)
+ pixel_ptr++;
+ }
+ }
+ else
+ {
+ // copy pixels directly to output
+ while (rle_code--)
+ {
+ stream_ptr++; // Ignore alpha channel
+ decoded[pixel_ptr++] = encoded[stream_ptr + 2];
+ decoded[pixel_ptr++] = encoded[stream_ptr + 1];
+ decoded[pixel_ptr++] = encoded[stream_ptr + 0];
+ stream_ptr += 3;
+ if (bytes_per_pixel == 4)
+ pixel_ptr++;
+ }
+ }
+ }
+
+ row_ptr += row_inc;
+ }
+}
+
void qt_decode_rle(
unsigned char *encoded,
int encoded_size,
@@ -296,5 +387,14 @@ void qt_decode_rle(
height,
bytes_per_pixel);
break;
+ case 32:
+ qt_decode_rle32(
+ encoded,
+ encoded_size,
+ decoded,
+ width,
+ height,
+ bytes_per_pixel);
+ break;
}
}