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[34.83.118.50]) by smtp.gmail.com with ESMTPSA id t18-20020a170902d15200b0016c304612a0sm2210654plt.292.2022.07.21.16.39.45 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 21 Jul 2022 16:39:45 -0700 (PDT) From: softworkz X-Google-Original-From: softworkz Message-Id: In-Reply-To: References: Date: Thu, 21 Jul 2022 23:39:40 +0000 Fcc: Sent MIME-Version: 1.0 To: ffmpeg-devel@ffmpeg.org Subject: [FFmpeg-devel] [PATCH v3 1/4] avutil/buffer: add av_ref_from_buffer() function 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 Cc: Mark Thompson , softworkz Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: M+f5x44HPQMC From: softworkz This allows to create AVBufferRef from AVBuffer directly. Signed-off-by: softworkz --- libavutil/buffer.c | 16 ++++++++++++++++ libavutil/buffer.h | 8 ++++++++ 2 files changed, 24 insertions(+) diff --git a/libavutil/buffer.c b/libavutil/buffer.c index 54590be566..f9df0ad6ea 100644 --- a/libavutil/buffer.c +++ b/libavutil/buffer.c @@ -100,6 +100,22 @@ AVBufferRef *av_buffer_allocz(size_t size) return ret; } +AVBufferRef *av_ref_from_buffer(AVBuffer *buf) +{ + AVBufferRef *ref = av_mallocz(sizeof(*ref)); + + if (!ref) + return NULL; + + ref->buffer = buf; + ref->data = buf->data; + ref->size = buf->size; + + atomic_fetch_add_explicit(&buf->refcount, 1, memory_order_relaxed); + + return ref; +} + AVBufferRef *av_buffer_ref(const AVBufferRef *buf) { AVBufferRef *ret = av_mallocz(sizeof(*ret)); diff --git a/libavutil/buffer.h b/libavutil/buffer.h index e1ef5b7f07..491734b9ca 100644 --- a/libavutil/buffer.h +++ b/libavutil/buffer.h @@ -139,6 +139,14 @@ AVBufferRef *av_buffer_create(uint8_t *data, size_t size, */ void av_buffer_default_free(void *opaque, uint8_t *data); +/** + * Create a new reference to an AVBuffer. + * + * @return a new AVBufferRef referring to the same AVBuffer as buf or NULL on + * failure. + */ +AVBufferRef *av_ref_from_buffer(AVBuffer *buf); + /** * Create a new reference to an AVBuffer. *