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[84.188.134.134]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-395c7df35ecsm15809347f8f.16.2025.03.17.10.49.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Mar 2025 10:49:24 -0700 (PDT) From: Manuel Lauss <manuel.lauss@gmail.com> To: ffmpeg-devel@ffmpeg.org Date: Mon, 17 Mar 2025 18:49:08 +0100 Message-ID: <20250317174917.6872-7-manuel.lauss@gmail.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250317174917.6872-1-manuel.lauss@gmail.com> References: <20250317174917.6872-1-manuel.lauss@gmail.com> MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH v3 06/14] avcodec/sanm: codec2 decoder X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches <ffmpeg-devel.ffmpeg.org> List-Unsubscribe: <https://ffmpeg.org/mailman/options/ffmpeg-devel>, <mailto:ffmpeg-devel-request@ffmpeg.org?subject=unsubscribe> List-Archive: <https://ffmpeg.org/pipermail/ffmpeg-devel> List-Post: <mailto:ffmpeg-devel@ffmpeg.org> List-Help: <mailto:ffmpeg-devel-request@ffmpeg.org?subject=help> List-Subscribe: <https://ffmpeg.org/mailman/listinfo/ffmpeg-devel>, <mailto:ffmpeg-devel-request@ffmpeg.org?subject=subscribe> Reply-To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org> Cc: Manuel Lauss <manuel.lauss@gmail.com> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" <ffmpeg-devel-bounces@ffmpeg.org> Archived-At: <https://master.gitmailbox.com/ffmpegdev/20250317174917.6872-7-manuel.lauss@gmail.com/> List-Archive: <https://master.gitmailbox.com/ffmpegdev/> List-Post: <mailto:ffmpegdev@gitmailbox.com> this codec consists of 4 byte packets: 2bytes delta-x, 1 byte delta-y and 1 byte color to put at that spot. Used in Rebel Assault 1 only. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> --- v2, v3: no changes. libavcodec/sanm.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c index e1471211d6..3fa6c334df 100644 --- a/libavcodec/sanm.c +++ b/libavcodec/sanm.c @@ -607,6 +607,24 @@ static int old_codec1(SANMVideoContext *ctx, int top, return 0; } +static int old_codec2(SANMVideoContext *ctx, int top, + int left, int width, int height) +{ + uint8_t *dst = (uint8_t *)ctx->frm0, col; + int16_t xpos = left, ypos = top; + + while (bytestream2_get_bytes_left(&ctx->gb) > 3) { + xpos += bytestream2_get_le16u(&ctx->gb); + ypos += bytestream2_get_byteu(&ctx->gb); + col = bytestream2_get_byteu(&ctx->gb); + if (xpos >= 0 && ypos >= 0 && + xpos < ctx->width && ypos < ctx->height) { + *(dst + xpos + ypos * ctx->pitch) = col; + } + } + return 0; +} + static inline void codec37_mv(uint8_t *dst, const uint8_t *src, int height, int stride, int x, int y) { @@ -1313,6 +1331,8 @@ static int process_frame_obj(SANMVideoContext *ctx) case 1: case 3: return old_codec1(ctx, top, left, w, h, codec == 3); + case 2: + return old_codec2(ctx, top, left, w, h); case 37: return old_codec37(ctx, w, h); case 47: -- 2.49.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".