[FFmpeg-devel] [PATCH] avcodec/pcm_tablegen: Fix hardcoded-tables if alaw,mulaw,vidc codecs disabled (PR #20436)

[mkver via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>]

PR #20436 opened by mkver
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20436
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20436.patch

Given that the various tableinit functions are no longer compiled unconditionally, one gets a compilation failure in pcm_tablegen.c (which creates the tables to be hardcoded) when both the encoder as well as the decoder are disabled for any one of {alaw,mulaw,vidc}. This commit fixes this scenario. It is intended to be applied after #20394 (otherwise, it would cause a regression when only the encoder is disabled with the decoder enabled).



>From 4aabe5c9169d1242c4a2ba64e9943ab19cf4721f Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Date: Thu, 4 Sep 2025 14:56:13 +0200
Subject: [PATCH] avcodec/pcm_tablegen: Fix hardcoded-tables if alaw,mulaw,vidc
 codecs disabled

Since ae448e00afb43d7f72dfa9c82a4c45994e4fea6a the various
tableinit functions are not compiled unconditionally any more,
so that pcm_tablegen.c (which creates the hardcoded tables)
needs to be updated.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/pcm_tablegen.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/libavcodec/pcm_tablegen.c b/libavcodec/pcm_tablegen.c
index 473a47f6d9..cff713606b 100644
--- a/libavcodec/pcm_tablegen.c
+++ b/libavcodec/pcm_tablegen.c
@@ -21,21 +21,27 @@
  */
 
 #include <stdlib.h>
+#include "config_components.h"
 #define CONFIG_HARDCODED_TABLES 0
 #include "pcm_tablegen.h"
 #include "tableprint.h"
 
 int main(void)
 {
-    pcm_alaw_tableinit();
-    pcm_ulaw_tableinit();
-    pcm_vidc_tableinit();
-
     write_fileheader();
 
+#if CONFIG_PCM_ALAW_ENCODER
+    pcm_alaw_tableinit();
     WRITE_ARRAY("static const", uint8_t, linear_to_alaw);
+#endif
+#if CONFIG_PCM_MULAW_ENCODER
+    pcm_ulaw_tableinit();
     WRITE_ARRAY("static const", uint8_t, linear_to_ulaw);
+#endif
+#if CONFIG_PCM_VIDC_ENCODER
+    pcm_vidc_tableinit();
     WRITE_ARRAY("static const", uint8_t, linear_to_vidc);
+#endif
 
     return 0;
 }
-- 
2.49.1

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