lavc: rename AV_CODEC_CAP_AUTO_THREADS->AV_CODEC_CAP_OTHER_THREADS

This cap is currently used to mark multithreading-capable codecs that
wrap external libraries with their own multithreading code. The name is
highly confusing for our API users, since libavcodec ALWAYS handles
thread_count=0 (see commit message in previous commit). Therefore rename
the cap and update its documentation to make its meaning clear.

The old name is kept deprecated until next+1 major bump.

19 files changed, 38 insertions, 25 deletions

diff --git a/doc/APIchanges b/doc/APIchanges
index c0d955b1fa..bed34df861 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,11 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2021-03-xx - xxxxxxxxxx - lavc 58.132.100 - codec.h
+  Add AV_CODEC_CAP_OTHER_THREADS as a new name for
+  AV_CODEC_CAP_AUTO_THREADS. AV_CODEC_CAP_AUTO_THREADS
+  is now deprecated.
+
 2021-03-12 - xxxxxxxxxx - lavc 58.131.100 - avcodec.h codec.h
   Add a get_encode_buffer callback to AVCodecContext, similar to
   get_buffer2 but for encoders.
diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
index 8cfca22564..5e2d3c174b 100644
--- a/fftools/cmdutils.c
+++ b/fftools/cmdutils.c
@@ -1415,7 +1415,7 @@ static void print_codec(const AVCodec *c)
         printf("variable ");
     if (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
                            AV_CODEC_CAP_SLICE_THREADS |
-                           AV_CODEC_CAP_AUTO_THREADS))
+                           AV_CODEC_CAP_OTHER_THREADS))
         printf("threads ");
     if (c->capabilities & AV_CODEC_CAP_AVOID_PROBING)
         printf("avoidprobe ");
@@ -1432,12 +1432,12 @@ static void print_codec(const AVCodec *c)
         printf("    Threading capabilities: ");
         switch (c->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
                                    AV_CODEC_CAP_SLICE_THREADS |
-                                   AV_CODEC_CAP_AUTO_THREADS)) {
+                                   AV_CODEC_CAP_OTHER_THREADS)) {
         case AV_CODEC_CAP_FRAME_THREADS |
              AV_CODEC_CAP_SLICE_THREADS: printf("frame and slice"); break;
         case AV_CODEC_CAP_FRAME_THREADS: printf("frame");           break;
         case AV_CODEC_CAP_SLICE_THREADS: printf("slice");           break;
-        case AV_CODEC_CAP_AUTO_THREADS : printf("auto");            break;
+        case AV_CODEC_CAP_OTHER_THREADS: printf("other");           break;
         default:                         printf("none");            break;
         }
         printf("\n");
diff --git a/libavcodec/codec.h b/libavcodec/codec.h
index 1bb70260ac..50a22f6e3c 100644
--- a/libavcodec/codec.h
+++ b/libavcodec/codec.h
@@ -115,9 +115,14 @@
  */
 #define AV_CODEC_CAP_PARAM_CHANGE        (1 << 14)
 /**
- * Codec supports avctx->thread_count == 0 (auto).
+ * Codec supports multithreading through a method other than slice- or
+ * frame-level multithreading. Typically this marks wrappers around
+ * multithreading-capable external libraries.
  */
-#define AV_CODEC_CAP_AUTO_THREADS        (1 << 15)
+#define AV_CODEC_CAP_OTHER_THREADS       (1 << 15)
+#if FF_API_AUTO_THREADS
+#define AV_CODEC_CAP_AUTO_THREADS        AV_CODEC_CAP_OTHER_THREADS
+#endif
 /**
  * Audio encoder supports receiving a different number of samples in each call.
  */
diff --git a/libavcodec/libaomdec.c b/libavcodec/libaomdec.c
index 327a5e18fb..1fc0a0001d 100644
--- a/libavcodec/libaomdec.c
+++ b/libavcodec/libaomdec.c
@@ -236,7 +236,7 @@ AVCodec ff_libaom_av1_decoder = {
     .init           = av1_init,
     .close          = aom_free,
     .decode         = aom_decode,
-    .capabilities   = AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_DR1,
+    .capabilities   = AV_CODEC_CAP_OTHER_THREADS | AV_CODEC_CAP_DR1,
     .caps_internal  = FF_CODEC_CAP_AUTO_THREADS,
     .profiles       = NULL_IF_CONFIG_SMALL(ff_av1_profiles),
     .wrapper_name   = "libaom",
diff --git a/libavcodec/libaomenc.c b/libavcodec/libaomenc.c
index f99fdc0b73..2c3c3eb185 100644
--- a/libavcodec/libaomenc.c
+++ b/libavcodec/libaomenc.c
@@ -1345,7 +1345,7 @@ AVCodec ff_libaom_av1_encoder = {
     .init           = av1_init,
     .encode2        = aom_encode,
     .close          = aom_free,
-    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_AUTO_THREADS,
     .profiles       = NULL_IF_CONFIG_SMALL(ff_av1_profiles),
     .priv_class     = &class_aom,
diff --git a/libavcodec/libdav1d.c b/libavcodec/libdav1d.c
index 93aeab4cb1..3c2a68b7e0 100644
--- a/libavcodec/libdav1d.c
+++ b/libavcodec/libdav1d.c
@@ -484,7 +484,7 @@ AVCodec ff_libdav1d_decoder = {
     .close          = libdav1d_close,
     .flush          = libdav1d_flush,
     .receive_frame  = libdav1d_receive_frame,
-    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_SETS_PKT_DTS |
                       FF_CODEC_CAP_AUTO_THREADS,
     .priv_class     = &libdav1d_class,
diff --git a/libavcodec/libdavs2.c b/libavcodec/libdavs2.c
index f6a03df373..383b54039a 100644
--- a/libavcodec/libdavs2.c
+++ b/libavcodec/libdavs2.c
@@ -221,7 +221,7 @@ AVCodec ff_libdavs2_decoder = {
     .close          = davs2_end,
     .decode         = davs2_decode_frame,
     .flush          = davs2_flush,
-    .capabilities   =  AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   =  AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_AUTO_THREADS,
     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
                                                      AV_PIX_FMT_NONE },
diff --git a/libavcodec/libkvazaar.c b/libavcodec/libkvazaar.c
index f75aa4eda3..4432649853 100644
--- a/libavcodec/libkvazaar.c
+++ b/libavcodec/libkvazaar.c
@@ -330,7 +330,7 @@ AVCodec ff_libkvazaar_encoder = {
     .long_name        = NULL_IF_CONFIG_SMALL("libkvazaar H.265 / HEVC"),
     .type             = AVMEDIA_TYPE_VIDEO,
     .id               = AV_CODEC_ID_HEVC,
-    .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
     .pix_fmts         = pix_fmts,
 
     .priv_class       = &class,
diff --git a/libavcodec/libopenh264enc.c b/libavcodec/libopenh264enc.c
index cb5deb8b50..0eade73498 100644
--- a/libavcodec/libopenh264enc.c
+++ b/libavcodec/libopenh264enc.c
@@ -447,7 +447,7 @@ AVCodec ff_libopenh264_encoder = {
     .init           = svc_encode_init,
     .encode2        = svc_encode_frame,
     .close          = svc_encode_close,
-    .capabilities   = AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   = AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP |
                       FF_CODEC_CAP_AUTO_THREADS,
     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
diff --git a/libavcodec/librav1e.c b/libavcodec/librav1e.c
index bd93073664..34158bc75a 100644
--- a/libavcodec/librav1e.c
+++ b/libavcodec/librav1e.c
@@ -624,7 +624,7 @@ AVCodec ff_librav1e_encoder = {
     .priv_class     = &class,
     .defaults       = librav1e_defaults,
     .pix_fmts       = librav1e_pix_fmts,
-    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_AUTO_THREADS,
     .wrapper_name   = "librav1e",
 };
diff --git a/libavcodec/libsvtav1.c b/libavcodec/libsvtav1.c
index 4244ae1daa..cfd93a2484 100644
--- a/libavcodec/libsvtav1.c
+++ b/libavcodec/libsvtav1.c
@@ -560,7 +560,7 @@ AVCodec ff_libsvtav1_encoder = {
     .init           = eb_enc_init,
     .receive_packet = eb_receive_packet,
     .close          = eb_enc_close,
-    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_AUTO_THREADS,
     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
                                                     AV_PIX_FMT_YUV420P10,
diff --git a/libavcodec/libuavs3d.c b/libavcodec/libuavs3d.c
index 6bc0ba09f0..be03da39e2 100644
--- a/libavcodec/libuavs3d.c
+++ b/libavcodec/libuavs3d.c
@@ -253,7 +253,7 @@ AVCodec ff_libuavs3d_decoder = {
     .init           = libuavs3d_init,
     .close          = libuavs3d_end,
     .decode         = libuavs3d_decode_frame,
-    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_AUTO_THREADS,
     .flush          = libuavs3d_flush,
     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
diff --git a/libavcodec/libvpxdec.c b/libavcodec/libvpxdec.c
index 8a4e4fd149..9b5728fba4 100644
--- a/libavcodec/libvpxdec.c
+++ b/libavcodec/libvpxdec.c
@@ -361,7 +361,7 @@ AVCodec ff_libvpx_vp8_decoder = {
     .init           = vp8_init,
     .close          = vpx_free,
     .decode         = vpx_decode,
-    .capabilities   = AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_DR1,
+    .capabilities   = AV_CODEC_CAP_OTHER_THREADS | AV_CODEC_CAP_DR1,
     .caps_internal  = FF_CODEC_CAP_AUTO_THREADS,
     .wrapper_name   = "libvpx",
 };
@@ -383,7 +383,7 @@ AVCodec ff_libvpx_vp9_decoder = {
     .init           = vp9_init,
     .close          = vpx_free,
     .decode         = vpx_decode,
-    .capabilities   = AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   = AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_AUTO_THREADS,
     .init_static_data = ff_vp9_init_static,
     .profiles       = NULL_IF_CONFIG_SMALL(ff_vp9_profiles),
diff --git a/libavcodec/libvpxenc.c b/libavcodec/libvpxenc.c
index df79839df5..3f36943c12 100644
--- a/libavcodec/libvpxenc.c
+++ b/libavcodec/libvpxenc.c
@@ -1870,7 +1870,7 @@ AVCodec ff_libvpx_vp8_encoder = {
     .init           = vp8_init,
     .encode2        = vpx_encode,
     .close          = vpx_free,
-    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_AUTO_THREADS,
     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_NONE },
     .priv_class     = &class_vp8,
@@ -1901,7 +1901,7 @@ AVCodec ff_libvpx_vp9_encoder = {
     .init           = vp9_init,
     .encode2        = vpx_encode,
     .close          = vpx_free,
-    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_AUTO_THREADS,
     .profiles       = NULL_IF_CONFIG_SMALL(ff_vp9_profiles),
     .priv_class     = &class_vp9,
diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index f152e453ce..4ddc4973a4 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -1202,7 +1202,7 @@ AVCodec ff_libx264_encoder = {
     .init             = X264_init,
     .encode2          = X264_frame,
     .close            = X264_close,
-    .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS |
+    .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS |
                         AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
     .caps_internal    = FF_CODEC_CAP_AUTO_THREADS,
     .priv_class       = &x264_class,
@@ -1238,7 +1238,7 @@ AVCodec ff_libx264rgb_encoder = {
     .init           = X264_init,
     .encode2        = X264_frame,
     .close          = X264_close,
-    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS |
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS |
                       AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
     .priv_class     = &rgbclass,
     .defaults       = x264_defaults,
@@ -1269,7 +1269,7 @@ AVCodec ff_libx262_encoder = {
     .init             = X264_init,
     .encode2          = X264_frame,
     .close            = X264_close,
-    .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS |
+    .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS |
                         AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
     .priv_class       = &X262_class,
     .defaults         = x264_defaults,
diff --git a/libavcodec/libx265.c b/libavcodec/libx265.c
index d502f47662..b2008e96f1 100644
--- a/libavcodec/libx265.c
+++ b/libavcodec/libx265.c
@@ -700,7 +700,7 @@ AVCodec ff_libx265_encoder = {
     .priv_data_size   = sizeof(libx265Context),
     .priv_class       = &class,
     .defaults         = x265_defaults,
-    .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS |
+    .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS |
                         AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
     .caps_internal    = FF_CODEC_CAP_AUTO_THREADS,
     .wrapper_name     = "libx265",
diff --git a/libavcodec/libxavs.c b/libavcodec/libxavs.c
index 12d5a5eb9e..a83b93b836 100644
--- a/libavcodec/libxavs.c
+++ b/libavcodec/libxavs.c
@@ -475,7 +475,7 @@ AVCodec ff_libxavs_encoder = {
     .init           = XAVS_init,
     .encode2        = XAVS_frame,
     .close          = XAVS_close,
-    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_AUTO_THREADS,
     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
     .priv_class     = &xavs_class,
diff --git a/libavcodec/libxavs2.c b/libavcodec/libxavs2.c
index cd29d2b938..2a4a3e36bd 100644
--- a/libavcodec/libxavs2.c
+++ b/libavcodec/libxavs2.c
@@ -294,7 +294,7 @@ AVCodec ff_libxavs2_encoder = {
     .init           = xavs2_init,
     .encode2        = xavs2_encode_frame,
     .close          = xavs2_close,
-    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
     .caps_internal  = FF_CODEC_CAP_AUTO_THREADS,
     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
                                                      AV_PIX_FMT_NONE },
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 4299ad4239..4e5a630862 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -28,7 +28,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  58
-#define LIBAVCODEC_VERSION_MINOR 131
+#define LIBAVCODEC_VERSION_MINOR 132
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
@@ -162,5 +162,8 @@
 #ifndef FF_API_GET_FRAME_CLASS
 #define FF_API_GET_FRAME_CLASS     (LIBAVCODEC_VERSION_MAJOR < 60)
 #endif
+#ifndef FF_API_AUTO_THREADS
+#define FF_API_AUTO_THREADS        (LIBAVCODEC_VERSION_MAJOR < 60)
+#endif
 
 #endif /* AVCODEC_VERSION_H */