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[49.180.2.147]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7e29ff6c68csm14130547b3a.19.2025.12.08.15.25.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Dec 2025 15:25:19 -0800 (PST) To: ffmpeg-devel@ffmpeg.org Date: Tue, 9 Dec 2025 10:24:56 +1100 Message-ID: <20251208232456.651102-1-battle.beater2005@gmail.com> X-Mailer: git-send-email 2.51.2 MIME-Version: 1.0 X-MailFrom: SRS0=yLC4=6O=gmail.com=battle.beater2005@ffmpeg.org X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-ffmpeg-devel.ffmpeg.org-0; header-match-ffmpeg-devel.ffmpeg.org-1; header-match-ffmpeg-devel.ffmpeg.org-2; header-match-ffmpeg-devel.ffmpeg.org-3; emergency; member-moderation Message-ID-Hash: LN4RE3WCY654OXDVQMFAW6E2VM4GVB4P X-Message-ID-Hash: LN4RE3WCY654OXDVQMFAW6E2VM4GVB4P X-Mailman-Approved-At: Thu, 11 Dec 2025 03:26:23 +0000 X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] [PATCH] avcodec/mjpegdec: skip scan copy and marker hunt for hwaccel List-Id: FFmpeg development discussions and patches Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: omar via ffmpeg-devel Cc: omar Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Archived-At: List-Archive: List-Post: --- libavcodec/mjpegdec.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c index 4d7cdfde12..4f65e329b7 100644 --- a/libavcodec/mjpegdec.c +++ b/libavcodec/mjpegdec.c @@ -2221,6 +2221,13 @@ int ff_mjpeg_find_marker(MJpegDecodeContext *s, int start_code; start_code = find_marker(buf_ptr, buf_end); + /* for hardware decoders we can just hand the raw scan to the accelerator */ + if (s->avctx->hwaccel) { + *unescaped_buf_ptr = *buf_ptr; + *unescaped_buf_size = buf_end - *buf_ptr; + return start_code; + } + av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr); if (!s->buffer) return AVERROR(ENOMEM); @@ -2560,6 +2567,12 @@ eoi_parser: if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) goto fail; + + /* hardware decoders consume the raw scan directly */ + if (avctx->hwaccel) { + buf_ptr = buf_end; + goto eoi_parser; + } break; case DRI: if ((ret = mjpeg_decode_dri(s)) < 0) -- 2.51.2 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org