[FFmpeg-devel] [PATCH 1/2] avcodec/asvenc: Don't use FF_INPUT_BUFFER_MIN_SIZE

[Andreas Rheinhardt <andreas.rheinhardt@outlook.com>]

[-- Attachment #1: Type: text/plain, Size: 29 bytes --]

Patches attached.

- Andreas

[-- Attachment #2: 0001-avcodec-asvenc-Don-t-use-FF_INPUT_BUFFER_MIN_SIZE.patch --]
[-- Type: text/x-patch, Size: 1131 bytes --]

From e2ca8a7268f0d6071d170b1d99e5a264392e1b2e Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Date: Fri, 11 Apr 2025 00:36:59 +0200
Subject: [PATCH 1/2] avcodec/asvenc: Don't use FF_INPUT_BUFFER_MIN_SIZE

ASV-1/2 does not really have a header and so using
FF_INPUT_BUFFER_MIN_SIZE is wasteful as well as ugly
(such bounds should be codec-specific).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/asvenc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/asvenc.c b/libavcodec/asvenc.c
index 9218a41021..e7d931cca9 100644
--- a/libavcodec/asvenc.c
+++ b/libavcodec/asvenc.c
@@ -271,8 +271,8 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
         return ret;
     }
 
-    if ((ret = ff_alloc_packet(avctx, pkt, c->mb_height * c->mb_width * MAX_MB_SIZE +
-                               FF_INPUT_BUFFER_MIN_SIZE)) < 0)
+    ret = ff_alloc_packet(avctx, pkt, c->mb_height * c->mb_width * MAX_MB_SIZE + 3);
+    if (ret < 0)
         return ret;
 
     init_put_bits(&a->pb, pkt->data, pkt->size);
-- 
2.45.2


[-- Attachment #3: 0002-avcodec-asvenc-Use-tighter-MAX_MB_SIZE-constant.patch --]
[-- Type: text/x-patch, Size: 1392 bytes --]

From 653e8d3da311b56914fb8888e80b56507ee5fe38 Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Date: Fri, 11 Apr 2025 00:38:59 +0200
Subject: [PATCH 2/2] avcodec/asvenc: Use tighter MAX_MB_SIZE constant

Also document the constant.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/asvenc.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/libavcodec/asvenc.c b/libavcodec/asvenc.c
index e7d931cca9..52666ee547 100644
--- a/libavcodec/asvenc.c
+++ b/libavcodec/asvenc.c
@@ -50,6 +50,14 @@ typedef struct ASVEncContext {
     int q_intra_matrix[64];
 } ASVEncContext;
 
+enum {
+    ASV1_MAX_BLOCK_SIZE = 8 + 10 * FFMAX(2 /* skip */, 5 /* ccp */ + 4 * 11 /* level */) + 5,
+    ASV1_MAX_MB_SIZE    = 6 * ASV1_MAX_BLOCK_SIZE,
+    ASV2_MAX_BLOCK_SIZE = 4 + 8 + 16 * (6 /* ccp */ + 4 * 13 /* level */),
+    ASV2_MAX_MB_SIZE    = 6 * ASV2_MAX_BLOCK_SIZE,
+    MAX_MB_SIZE         = (FFMAX(ASV1_MAX_MB_SIZE, ASV2_MAX_MB_SIZE) + 7) / 8
+};
+
 static inline void asv1_put_level(PutBitContext *pb, int level)
 {
     unsigned int index = level + 3;
@@ -177,8 +185,6 @@ static inline void asv2_encode_block(ASVEncContext *a, int16_t block[64])
     }
 }
 
-#define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8)
-
 static inline int encode_mb(ASVEncContext *a, int16_t block[6][64])
 {
     int i;
-- 
2.45.2


[-- Attachment #4: Type: text/plain, Size: 251 bytes --]

_______________________________________________
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".