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Fri, 09 Aug 2024 04:26:23 -0700 (PDT) Received: from localhost.localdomain ([2a02:a03f:6610:8700:a59e:a164:e144:7458]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4290c72d6c8sm72385685e9.9.2024.08.09.04.26.22 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Aug 2024 04:26:23 -0700 (PDT) From: Ramiro Polla To: ffmpeg-devel@ffmpeg.org Date: Fri, 9 Aug 2024 13:26:09 +0200 Message-Id: <20240809112612.107000-1-ramiro.polla@gmail.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 1/4] swscale: add nv24/nv42 to yuv420p unscaled converter X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: --- libswscale/swscale_unscaled.c | 45 +++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/libswscale/swscale_unscaled.c b/libswscale/swscale_unscaled.c index a5c9917799..239258ab8c 100644 --- a/libswscale/swscale_unscaled.c +++ b/libswscale/swscale_unscaled.c @@ -221,6 +221,48 @@ static int nv24ToPlanarWrapper(SwsContext *c, const uint8_t *src[], return srcSliceH; } +static void nv24_to_yuv420p_chroma(uint8_t *dst1, int dstStride1, + uint8_t *dst2, int dstStride2, + const uint8_t *src, int srcStride, + int w, int h) +{ + const uint8_t *src1 = src; + const uint8_t *src2 = src + srcStride; + // average 4 pixels into 1 (interleaved U and V) + for (int y = 0; y < h; y += 2) { + for (int x = 0; x < w; x++) { + dst1[x] = (src1[4 * x + 0] + src1[4 * x + 2] + + src2[4 * x + 0] + src2[4 * x + 2]) >> 2; + dst2[x] = (src1[4 * x + 1] + src1[4 * x + 3] + + src2[4 * x + 1] + src2[4 * x + 3]) >> 2; + } + src1 += srcStride * 2; + src2 += srcStride * 2; + dst1 += dstStride1; + dst2 += dstStride2; + } +} + +static int nv24ToYuv420Wrapper(SwsContext *c, const uint8_t *src[], + int srcStride[], int srcSliceY, int srcSliceH, + uint8_t *dstParam[], int dstStride[]) +{ + uint8_t *dst1 = dstParam[1] + dstStride[1] * srcSliceY / 2; + uint8_t *dst2 = dstParam[2] + dstStride[2] * srcSliceY / 2; + + copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW, + dstParam[0], dstStride[0]); + + if (c->srcFormat == AV_PIX_FMT_NV24) + nv24_to_yuv420p_chroma(dst1, dstStride[1], dst2, dstStride[2], + src[1], srcStride[1], c->srcW / 2, srcSliceH); + else + nv24_to_yuv420p_chroma(dst2, dstStride[2], dst1, dstStride[1], + src[1], srcStride[1], c->srcW / 2, srcSliceH); + + return srcSliceH; +} + static int planarToP01xWrapper(SwsContext *c, const uint8_t *src8[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dstParam8[], @@ -2206,6 +2248,9 @@ void ff_get_unscaled_swscale(SwsContext *c) c->convert_unscaled = yuyvToYuv422Wrapper; if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P) c->convert_unscaled = uyvyToYuv422Wrapper; + if (dstFormat == AV_PIX_FMT_YUV420P && + (srcFormat == AV_PIX_FMT_NV24 || srcFormat == AV_PIX_FMT_NV42)) + c->convert_unscaled = nv24ToYuv420Wrapper; #define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_YA8 && (x) != AV_PIX_FMT_YA16LE && (x) != AV_PIX_FMT_YA16BE) /* simple copy */ -- 2.30.2 _______________________________________________ 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".