[FFmpeg-devel] [PATCH 1/3] avcodec/tests/avcodec: Silence deprecation warnings

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

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Patches attached.

- Andreas

[-- Attachment #2: 0001-avcodec-tests-avcodec-Silence-deprecation-warnings.patch --]
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From 32b1b86c68262a474493de2e109bdd4985b267dc Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Date: Mon, 10 Mar 2025 03:45:28 +0100
Subject: [PATCH 1/3] avcodec/tests/avcodec: Silence deprecation warnings

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/tests/avcodec.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavcodec/tests/avcodec.c b/libavcodec/tests/avcodec.c
index cd949f6385..83a5d05316 100644
--- a/libavcodec/tests/avcodec.c
+++ b/libavcodec/tests/avcodec.c
@@ -77,17 +77,21 @@ int main(void){
             ERR_EXT("Codec %s has unsupported type %s\n",
                     get_type_string(codec->type));
         if (codec->type != AVMEDIA_TYPE_AUDIO) {
+FF_DISABLE_DEPRECATION_WARNINGS
             if (codec->ch_layouts || codec->sample_fmts ||
                 codec->supported_samplerates)
                 ERR("Non-audio codec %s has audio-only fields set\n");
+FF_ENABLE_DEPRECATION_WARNINGS
             if (codec->capabilities & (AV_CODEC_CAP_SMALL_LAST_FRAME |
                                        AV_CODEC_CAP_CHANNEL_CONF     |
                                        AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
                 ERR("Non-audio codec %s has audio-only capabilities set\n");
         }
         if (codec->type != AVMEDIA_TYPE_VIDEO) {
+FF_DISABLE_DEPRECATION_WARNINGS
             if (codec->pix_fmts || codec->supported_framerates)
                 ERR("Non-video codec %s has video-only fields set\n");
+FF_ENABLE_DEPRECATION_WARNINGS
             if (codec2->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)
                 ERR("Non-video codec %s exports cropping\n");
         }
@@ -136,10 +140,12 @@ int main(void){
             if (codec2->update_thread_context || codec2->update_thread_context_for_user || codec2->bsfs)
                 ERR("Encoder %s has decoder-only thread functions or bsf.\n");
             if (codec->type == AVMEDIA_TYPE_AUDIO) {
+FF_DISABLE_DEPRECATION_WARNINGS
                 if (!codec->sample_fmts) {
                     av_log(NULL, AV_LOG_FATAL, "Encoder %s is missing the sample_fmts field\n", codec->name);
                     ret = 1;
                 }
+FF_ENABLE_DEPRECATION_WARNINGS
             }
             if (codec2->caps_internal & (FF_CODEC_CAP_USES_PROGRESSFRAMES |
                                         FF_CODEC_CAP_SETS_PKT_DTS |
-- 
2.45.2


[-- Attachment #3: 0002-avcodec-allcodecs-Don-t-wrap-supported_framerates.patch --]
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From 6b6786e5e9f574331eecd439e4794b4d795186cb Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Date: Mon, 10 Mar 2025 03:48:47 +0100
Subject: [PATCH 2/3] avcodec/allcodecs: Don't wrap supported_framerates

Only two encoders (the native MPEG-1/2 ones) provide
supported_framerates and they don't implement the
get_supported_config callback. It is highly unlikely that
any codec will set supported_framerates dynamically at all,
so remove the code querying for frame rates.

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

diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 3be33f5cc4..8605793c8f 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -941,10 +941,6 @@ FF_DISABLE_DEPRECATION_WARNINGS
                                         AV_CODEC_CONFIG_PIX_FORMAT, 0,
                                         (const void **) &codec->p.pix_fmts,
                                         &dummy);
-            codec->get_supported_config(NULL, &codec->p,
-                                        AV_CODEC_CONFIG_FRAME_RATE, 0,
-                                        (const void **) &codec->p.supported_framerates,
-                                        &dummy);
             break;
         case AVMEDIA_TYPE_AUDIO:
             codec->get_supported_config(NULL, &codec->p,
-- 
2.45.2


[-- Attachment #4: 0003-avcodec-mjpegenc-Reconstify-mjpeg-encoder.patch --]
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From 241957a4865e23dbf4feadb36451d8f56339742e Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Date: Mon, 10 Mar 2025 04:02:06 +0100
Subject: [PATCH 3/3] avcodec/mjpegenc: Reconstify mjpeg encoder

It has been deconstified in 2c2dfd914902d0b41b4bd30d4b19ae08af1d7bc1
because the FFCodec is touched in av_codec_init_static because
of its get_supported_config callback. Yet this is easily remedied:
Only call get_supported_config to set pix_fmts if the codec does
not already have it set.

This also fixes a mismatch between the declaration of ff_mjpeg_encoder
in allcodecs.c and the definition in mjpegenc.c. Said mismatch is
actually undefined behaviour.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/allcodecs.c | 9 +++++----
 libavcodec/mjpegenc.c  | 2 +-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 8605793c8f..de28863f1f 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -937,10 +937,11 @@ static void av_codec_init_static(void)
 FF_DISABLE_DEPRECATION_WARNINGS
         switch (codec->p.type) {
         case AVMEDIA_TYPE_VIDEO:
-            codec->get_supported_config(NULL, &codec->p,
-                                        AV_CODEC_CONFIG_PIX_FORMAT, 0,
-                                        (const void **) &codec->p.pix_fmts,
-                                        &dummy);
+            if (!codec->p.pix_fmts)
+                codec->get_supported_config(NULL, &codec->p,
+                                            AV_CODEC_CONFIG_PIX_FORMAT, 0,
+                                            (const void **) &codec->p.pix_fmts,
+                                            &dummy);
             break;
         case AVMEDIA_TYPE_AUDIO:
             codec->get_supported_config(NULL, &codec->p,
diff --git a/libavcodec/mjpegenc.c b/libavcodec/mjpegenc.c
index 3ac1010e4f..30f2c9900d 100644
--- a/libavcodec/mjpegenc.c
+++ b/libavcodec/mjpegenc.c
@@ -675,7 +675,7 @@ static int mjpeg_get_supported_config(const AVCodecContext *avctx,
     return ff_default_get_supported_config(avctx, codec, config, flags, out, out_num);
 }
 
-FFCodec ff_mjpeg_encoder = {
+const FFCodec ff_mjpeg_encoder = {
     .p.name         = "mjpeg",
     CODEC_LONG_NAME("MJPEG (Motion JPEG)"),
     .p.type         = AVMEDIA_TYPE_VIDEO,
-- 
2.45.2


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