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From: Manuel Lauss <manuel.lauss@gmail.com>
To: ffmpeg-devel@ffmpeg.org
Cc: Manuel Lauss <manuel.lauss@gmail.com>
Subject: [FFmpeg-devel] [PATCH v3 13/14] avcodec/sanm: codec20 decoder
Date: Mon, 17 Mar 2025 18:49:15 +0100
Message-ID: <20250317174917.6872-14-manuel.lauss@gmail.com> (raw)
In-Reply-To: <20250317174917.6872-1-manuel.lauss@gmail.com>

codec20 is raw uncompressed image data.

It is used internally in Rebel Assault 1 as a special format for STOR
(when parameter for STOR is set to 3), and is used again in
the "Full Throttle Remaster" from 2017.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
---
v3: newly added

 libavcodec/sanm.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c
index 730ec14b98..d8276f9d85 100644
--- a/libavcodec/sanm.c
+++ b/libavcodec/sanm.c
@@ -950,6 +950,24 @@ static int old_codec2(SANMVideoContext *ctx, GetByteContext *gb, int top,
     return 0;
 }
 
+static int old_codec20(SANMVideoContext *ctx, int w, int h)
+{
+    uint8_t *dst = (uint8_t *)ctx->frm0;
+
+    if (bytestream2_get_bytes_left(&ctx->gb) < w * h)
+        return AVERROR_INVALIDDATA;
+
+    if (w == ctx->pitch) {
+        bytestream2_get_bufferu(&ctx->gb, dst, w * h);
+    } else {
+        for (int i = 0; i < h; i++) {
+            bytestream2_get_bufferu(&ctx->gb, dst, w);
+            dst += ctx->pitch;
+        }
+    }
+    return 0;
+}
+
 static inline void codec37_mv(uint8_t *dst, const uint8_t *src,
                               int height, int stride, int x, int y)
 {
@@ -1673,6 +1691,8 @@ static int process_frame_obj(SANMVideoContext *ctx, GetByteContext *gb)
     case 33:
     case 34:
         return old_codec4(ctx, gb, top, left, w, h, param, parm2, codec);
+    case 20:
+        return old_codec20(ctx, w, h);
     case 21:
         return old_codec21(ctx, gb, top, left, w, h);
     case 23:
-- 
2.49.0

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  parent reply	other threads:[~2025-03-17 17:51 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-03-17 17:49 [FFmpeg-devel] [PATCH v3 00/14] avcodec/sanm: various improvements Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 01/14] avcodec/sanm: disable left/top for fullscreen codecs Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 02/14] avcodec/sanm: FOBJ left/top are signed values Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 03/14] avcodec/sanm: better frame size detection for old codecs Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 04/14] avcodec/sanm: better ANIMv1 engine support Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 05/14] avcodec/sanm: fix codec3 Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 06/14] avcodec/sanm: codec2 decoder Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 07/14] avcodec/sanm: codec23 decoder Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 08/14] avcodec/sanm: codec21 decoder Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 09/14] avcodec/sanm: codec4/5/33/34 decoder Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 10/14] avcodec/sanm: codec37: reimplement comp4 Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 11/14] avcodec/sanm: implement STOR/FTCH for ANIMv1 Manuel Lauss
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 12/14] avcodec/sanm: ignore codec45 Manuel Lauss
2025-03-17 17:49 ` Manuel Lauss [this message]
2025-03-17 17:49 ` [FFmpeg-devel] [PATCH v3 14/14] MAINTAINERS: add Manuel Lauss as sanm.c/smush.c Maintainer Manuel Lauss

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