emulators/retroarch: compatibility with ffmpeg 9.0

ports@,

I'd like to backport a fix for emulators/retroarch which fixes compatibility
with ffmpeg-9.0

Build tested against ffmpeg-9.0 and ffmpeg-8.1.2

The fix in upstream:
https://github.com/libretro/RetroArch/commit/f5b422d5a81f0b4d263e2f52c8419ea9ce7467f6

Ok?

Index: Makefile
===================================================================
RCS file: /home/cvs/ports/emulators/retroarch/Makefile,v
diff -u -p -r1.34 Makefile
--- Makefile	18 Feb 2026 18:32:50 -0000	1.34
+++ Makefile	12 Aug 2026 17:03:59 -0000
@@ -4,7 +4,7 @@ DISTNAME =		retroarch-sourceonly-$V
 PKGNAME =		retroarch-$V
 
 V =			1.21.0
-REVISION =		0
+REVISION =		1
 
 # crashes when recording videos due to ffmpeg
 USE_NOBTCFI-amd64 =	Yes
Index: patches/patch-camera_drivers_ffmpeg_c
===================================================================
RCS file: patches/patch-camera_drivers_ffmpeg_c
diff -N patches/patch-camera_drivers_ffmpeg_c
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ patches/patch-camera_drivers_ffmpeg_c	12 Aug 2026 17:07:36 -0000
@@ -0,0 +1,34 @@
+https://github.com/libretro/RetroArch/commit/f5b422d5a81f0b4d263e2f52c8419ea9ce7467f6
+
+Index: camera/drivers/ffmpeg.c
+--- camera/drivers/ffmpeg.c.orig
++++ camera/drivers/ffmpeg.c
+@@ -42,13 +42,26 @@
+ #define FFMPEG_CAMERA_DEFAULT_BACKEND "bktr"
+ #endif
+ 
++/* lavf 59 (FFmpeg 5.0) made the demuxer/codec discovery API const-correct:
++ * av_find_input_format() returns const AVInputFormat*, avformat_open_input()
++ * accepts one, and av_find_best_stream() takes const AVCodec**. Older
++ * versions use mutable pointers throughout, so a single const-qualified
++ * declaration cannot satisfy both. */
++#if LIBAVFORMAT_VERSION_MAJOR >= 59
++typedef const AVInputFormat ffmpeg_camera_input_format_t;
++typedef const AVCodec ffmpeg_camera_codec_t;
++#else
++typedef AVInputFormat ffmpeg_camera_input_format_t;
++typedef AVCodec ffmpeg_camera_codec_t;
++#endif
++
+ typedef struct ffmpeg_camera
+ {
+    sthread_t *poll_thread;
+    AVFormatContext *format_context;
+    AVCodecContext *decoder_context;
+-   const AVCodec *decoder;
+-   const AVInputFormat *input_format; /* owned by ffmpeg, don't free it */
++   ffmpeg_camera_codec_t *decoder; /* owned by ffmpeg, don't free it */
++   ffmpeg_camera_input_format_t *input_format; /* owned by ffmpeg, don't free it */
+    AVDictionary *options;
+    AVPacket *packet;
+    AVFrame *camera_frame;
Index: patches/patch-record_drivers_record_ffmpeg_c
===================================================================
RCS file: /home/cvs/ports/emulators/retroarch/patches/patch-record_drivers_record_ffmpeg_c,v
diff -u -p -r1.1 patch-record_drivers_record_ffmpeg_c
--- patches/patch-record_drivers_record_ffmpeg_c	21 Oct 2025 12:51:47 -0000	1.1
+++ patches/patch-record_drivers_record_ffmpeg_c	12 Aug 2026 17:06:43 -0000
@@ -1,9 +1,10 @@
 https://github.com/libretro/RetroArch/commit/21776a2e59f5f5899ff2198c0df25a95b5020012
+https://github.com/libretro/RetroArch/commit/f5b422d5a81f0b4d263e2f52c8419ea9ce7467f6
 
 Index: record/drivers/record_ffmpeg.c
 --- record/drivers/record_ffmpeg.c.orig
 +++ record/drivers/record_ffmpeg.c
-@@ -72,6 +72,15 @@ extern "C" {
+@@ -72,6 +72,24 @@ extern "C" {
  #ifndef FFMPEG3
  #define FFMPEG3 (LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58, 10, 100))
  #endif
@@ -12,6 +13,15 @@ Index: record/drivers/record_ffmpeg.c
 +#define FFMPEG8 (LIBAVCODEC_VERSION_MAJOR >= 62)
 +#endif
 +
++/* avcodec_get_supported_config() was added in lavc 61.13.100 (FFmpeg 7.1)
++ * and the AVCodec.sample_fmts / AVCodec.supported_samplerates arrays it
++ * replaces were deprecated at the same time, then removed entirely in
++ * lavc 63 (FFmpeg 9). Use the new API as soon as it is available so a
++ * single codepath covers FFmpeg 7.1 through 9+, and keep the old struct
++ * members for FFmpeg 7.0 and older. */
++#define HAVE_AVCODEC_GET_SUPPORTED_CONFIG \
++      (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(61, 13, 100))
++
 +#ifndef AV_INPUT_BUFFER_MIN_SIZE
 +#define AV_INPUT_BUFFER_MIN_SIZE 16384
 +#endif
@@ -19,7 +29,132 @@ Index: record/drivers/record_ffmpeg.c
  #define HAVE_CH_LAYOUT (LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(57, 28, 100))
  
  struct ff_video_info
-@@ -951,7 +960,11 @@ static void ffmpeg_free(void *data)
+@@ -200,11 +218,48 @@ typedef struct ffmpeg
+ 
+ AVFormatContext *ctx;
+ 
++/* Returns the encoder's list of supported sample formats, terminated by
++ * AV_SAMPLE_FMT_NONE, or NULL if the encoder does not restrict sample
++ * formats (or the list could not be queried). */
++static const enum AVSampleFormat *ffmpeg_codec_sample_formats(
++      const AVCodec *codec)
++{
++#if HAVE_AVCODEC_GET_SUPPORTED_CONFIG
++   const void *fmts = NULL;
++   if (avcodec_get_supported_config(NULL, codec,
++         AV_CODEC_CONFIG_SAMPLE_FORMAT, 0, &fmts, NULL) < 0)
++      return NULL;
++   return (const enum AVSampleFormat*)fmts;
++#else
++   return codec->sample_fmts;
++#endif
++}
++
++/* Returns the encoder's list of supported sample rates, terminated by 0,
++ * or NULL if the encoder does not restrict sample rates (or the list
++ * could not be queried). */
++static const int *ffmpeg_codec_supported_samplerates(const AVCodec *codec)
++{
++#if HAVE_AVCODEC_GET_SUPPORTED_CONFIG
++   const void *rates = NULL;
++   if (avcodec_get_supported_config(NULL, codec,
++         AV_CODEC_CONFIG_SAMPLE_RATE, 0, &rates, NULL) < 0)
++      return NULL;
++   return (const int*)rates;
++#else
++   return codec->supported_samplerates;
++#endif
++}
++
+ static bool ffmpeg_codec_has_sample_format(enum AVSampleFormat fmt,
+       const enum AVSampleFormat *fmts)
+ {
+    unsigned i;
+ 
++   /* A NULL list means the encoder does not restrict sample formats. */
++   if (!fmts)
++      return true;
++
+    for (i = 0; fmts[i] != AV_SAMPLE_FMT_NONE; i++)
+       if (fmt == fmts[i])
+          return true;
+@@ -214,30 +269,32 @@ static bool ffmpeg_codec_has_sample_format(enum AVSamp
+ static void ffmpeg_audio_resolve_format(struct ff_audio_info *audio,
+       const AVCodec *codec)
+ {
++   const enum AVSampleFormat *sample_fmts = ffmpeg_codec_sample_formats(codec);
++
+    audio->codec->sample_fmt = AV_SAMPLE_FMT_NONE;
+ 
+-   if (ffmpeg_codec_has_sample_format(AV_SAMPLE_FMT_FLTP, codec->sample_fmts))
++   if (ffmpeg_codec_has_sample_format(AV_SAMPLE_FMT_FLTP, sample_fmts))
+    {
+       audio->codec->sample_fmt = AV_SAMPLE_FMT_FLTP;
+       audio->use_float         = true;
+       audio->is_planar         = true;
+       RARCH_LOG("[FFmpeg]: Using sample format FLTP.\n");
+    }
+-   else if (ffmpeg_codec_has_sample_format(AV_SAMPLE_FMT_FLT, codec->sample_fmts))
++   else if (ffmpeg_codec_has_sample_format(AV_SAMPLE_FMT_FLT, sample_fmts))
+    {
+       audio->codec->sample_fmt = AV_SAMPLE_FMT_FLT;
+       audio->use_float         = true;
+       audio->is_planar         = false;
+       RARCH_LOG("[FFmpeg]: Using sample format FLT.\n");
+    }
+-   else if (ffmpeg_codec_has_sample_format(AV_SAMPLE_FMT_S16P, codec->sample_fmts))
++   else if (ffmpeg_codec_has_sample_format(AV_SAMPLE_FMT_S16P, sample_fmts))
+    {
+       audio->codec->sample_fmt = AV_SAMPLE_FMT_S16P;
+       audio->use_float         = false;
+       audio->is_planar         = true;
+       RARCH_LOG("[FFmpeg]: Using sample format S16P.\n");
+    }
+-   else if (ffmpeg_codec_has_sample_format(AV_SAMPLE_FMT_S16, codec->sample_fmts))
++   else if (ffmpeg_codec_has_sample_format(AV_SAMPLE_FMT_S16, sample_fmts))
+    {
+       audio->codec->sample_fmt = AV_SAMPLE_FMT_S16;
+       audio->use_float         = false;
+@@ -252,21 +309,24 @@ static void ffmpeg_audio_resolve_sample_rate(ffmpeg_t 
+ {
+    struct ff_config_param *params  = &handle->config;
+    struct record_params *param     = &handle->params;
++   const int *supported_samplerates = ffmpeg_codec_supported_samplerates(codec);
+ 
+-   /* We'll have to force resampling to some supported sampling rate. */
+-   if (codec->supported_samplerates && !params->sample_rate)
++   /* We'll have to force resampling to some supported sampling rate.
++    * A NULL list means the encoder accepts any sample rate, in which
++    * case the input rate is kept as-is. */
++   if (supported_samplerates && !params->sample_rate)
+    {
+       unsigned i;
+       int input_rate = (int)param->samplerate;
+ 
+       /* Favor closest sampling rate, but always prefer ratio > 1.0. */
+-      int best_rate  = codec->supported_samplerates[0];
++      int best_rate  = supported_samplerates[0];
+       int best_diff  = best_rate - input_rate;
+ 
+-      for (i = 1; codec->supported_samplerates[i]; i++)
++      for (i = 1; supported_samplerates[i]; i++)
+       {
+          bool better_rate = false;
+-         int diff         = codec->supported_samplerates[i] - input_rate;
++         int diff         = supported_samplerates[i] - input_rate;
+ 
+          if (best_diff < 0)
+             better_rate   = (diff > best_diff);
+@@ -275,7 +335,7 @@ static void ffmpeg_audio_resolve_sample_rate(ffmpeg_t 
+ 
+          if (better_rate)
+          {
+-            best_rate = codec->supported_samplerates[i];
++            best_rate = supported_samplerates[i];
+             best_diff = diff;
+          }
+       }
+@@ -951,7 +1011,11 @@ static void ffmpeg_free(void *data)
  
     if (handle->audio.codec)
     {
@@ -31,7 +166,7 @@ Index: record/drivers/record_ffmpeg.c
        av_free(handle->audio.codec);
     }
  
-@@ -959,7 +972,11 @@ static void ffmpeg_free(void *data)
+@@ -959,7 +1023,11 @@ static void ffmpeg_free(void *data)
  
     if (handle->video.codec)
     {


-- 
wbr, Kirill