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([150.242.65.63]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-34e70ddf58dsm16273620a91.17.2025.12.23.07.50.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Dec 2025 07:50:43 -0800 (PST) To: ffmpeg-devel@ffmpeg.org Date: Tue, 23 Dec 2025 21:20:27 +0530 Message-ID: <20251223155027.101044-1-imraja729@gmail.com> X-Mailer: git-send-email 2.48.1 MIME-Version: 1.0 Message-ID-Hash: S42DDXK7HVJAHMBWLNALRLVI2POJG3YH X-Message-ID-Hash: S42DDXK7HVJAHMBWLNALRLVI2POJG3YH X-MailFrom: SRS0=JFHy=65=gmail.com=imraja729@ffmpeg.org 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; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] [PATCH v3] avfilter/vf_alphamerge: add slice threading 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: Raja Rathour via ffmpeg-devel Cc: Raja Rathour Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Archived-At: List-Archive: List-Post: --- libavfilter/vf_alphamerge.c | 70 +++++++++++++++++++++++++------------ 1 file changed, 48 insertions(+), 22 deletions(-) diff --git a/libavfilter/vf_alphamerge.c b/libavfilter/vf_alphamerge.c index c17a647dbe..8ade9a2239 100644 --- a/libavfilter/vf_alphamerge.c +++ b/libavfilter/vf_alphamerge.c @@ -46,12 +46,53 @@ typedef struct AlphaMergeContext { FFFrameSync fs; } AlphaMergeContext; +typedef struct ThreadData { + AVFrame *main_buf; + AVFrame *alpha_buf; +} ThreadData; + +static int alphamerge_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) +{ + AlphaMergeContext *s = ctx->priv; + ThreadData *td = arg; + AVFrame *main_buf = td->main_buf; + AVFrame *alpha_buf = td->alpha_buf; + int slice_start, slice_end, y; + + slice_start = (main_buf->height * jobnr) / nb_jobs; + slice_end = (main_buf->height * (jobnr+1)) / nb_jobs; + + if (s->is_packed_rgb) { + int x; + uint8_t *pin, *pout; + for (y = slice_start; y < slice_end; y++) { + pin = alpha_buf->data[0] + y * alpha_buf->linesize[0]; + pout = main_buf->data[0] + y * main_buf->linesize[0] + s->rgba_map[A]; + for (x = 0; x < main_buf->width; x++) { + *pout = *pin; + pin += 1; + pout += 4; + } + } + } else { + const int main_linesize = main_buf->linesize[A]; + const int alpha_linesize = alpha_buf->linesize[Y]; + av_image_copy_plane(main_buf->data[A] + slice_start * main_linesize, + main_linesize, + alpha_buf->data[Y] + slice_start * alpha_linesize, + alpha_linesize, + FFMIN(main_linesize, alpha_linesize), + slice_end - slice_start); + } + return 0; +} + static int do_alphamerge(FFFrameSync *fs) { AVFilterContext *ctx = fs->parent; AVFilterLink *outlink = ctx->outputs[0]; - AlphaMergeContext *s = ctx->priv; AVFrame *main_buf, *alpha_buf; + ThreadData td; int ret; ret = ff_framesync_dualinput_get_writable(fs, &main_buf, &alpha_buf); @@ -67,25 +108,10 @@ static int do_alphamerge(FFFrameSync *fs) av_color_range_name(alpha_buf->color_range)); } - if (s->is_packed_rgb) { - int x, y; - uint8_t *pin, *pout; - for (y = 0; y < main_buf->height; y++) { - pin = alpha_buf->data[0] + y * alpha_buf->linesize[0]; - pout = main_buf->data[0] + y * main_buf->linesize[0] + s->rgba_map[A]; - for (x = 0; x < main_buf->width; x++) { - *pout = *pin; - pin += 1; - pout += 4; - } - } - } else { - const int main_linesize = main_buf->linesize[A]; - const int alpha_linesize = alpha_buf->linesize[Y]; - av_image_copy_plane(main_buf->data[A], main_linesize, - alpha_buf->data[Y], alpha_linesize, - FFMIN(main_linesize, alpha_linesize), alpha_buf->height); - } + td.main_buf = main_buf; + td.alpha_buf = alpha_buf; + ff_filter_execute(ctx, alphamerge_slice, &td, NULL, + FFMIN(main_buf->height, ff_filter_get_nb_threads(ctx))); return ff_filter_frame(ctx->outputs[0], main_buf); } @@ -210,7 +236,7 @@ const FFFilter ff_vf_alphamerge = { .p.description = NULL_IF_CONFIG_SMALL("Copy the luma value of the second " "input into the alpha channel of the first input."), .p.priv_class = &alphamerge_class, - .p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, + .p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS, .preinit = alphamerge_framesync_preinit, .priv_size = sizeof(AlphaMergeContext), .init = init, @@ -219,4 +245,4 @@ const FFFilter ff_vf_alphamerge = { FILTER_QUERY_FUNC2(query_formats), .uninit = uninit, .activate = activate, -}; +}; \ No newline at end of file -- 2.48.1 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org