avcodec/parser: move parsers list and related API to its own file

And add it to the CONFIGURABLE_COMPONENTS list in Makefile. This way, changes
to the new file will be tracked and the usual warning to suggest re-running
configure will be shown.

Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

Makefile

@@ -58,6 +58,7 @@ tools/target_dec_%_fuzzer$(EXESUF): $(FF_DEP_LIBS)
 CONFIGURABLE_COMPONENTS =                                           \
     $(wildcard $(FFLIBS:%=$(SRC_PATH)/lib%/all*.c))                 \
     $(SRC_PATH)/libavcodec/bitstream_filters.c                      \
+    $(SRC_PATH)/libavcodec/parsers.c                                \
     $(SRC_PATH)/libavformat/protocols.c                             \
 
 config.h: ffbuild/.config

configure

@@ -3679,7 +3679,7 @@ CODEC_LIST="
     $ENCODER_LIST
     $DECODER_LIST
 "
-PARSER_LIST=$(find_things_extern parser AVCodecParser libavcodec/parser.c)
+PARSER_LIST=$(find_things_extern parser AVCodecParser libavcodec/parsers.c)
 BSF_LIST=$(find_things_extern bsf AVBitStreamFilter libavcodec/bitstream_filters.c)
 HWACCEL_LIST=$(find_things_extern hwaccel AVHWAccel libavcodec/hwaccels.h)
 PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)

libavcodec/Makefile

@@ -44,6 +44,7 @@ OBJS = ac3_parser.o                                                     \
        options.o                                                        \
        mjpegenc_huffman.o                                               \
        parser.o                                                         \
+       parsers.o                                                        \
        profiles.o                                                       \
        qsv_api.o                                                        \
        raw.o                                                            \

libavcodec/parser.c

@@ -27,95 +27,10 @@
 #include "libavutil/avassert.h"
 #include "libavutil/internal.h"
 #include "libavutil/mem.h"
-#include "libavutil/thread.h"
 
 #include "internal.h"
 #include "parser.h"
 
-/* Parsers */
-extern AVCodecParser ff_aac_parser;
-extern AVCodecParser ff_aac_latm_parser;
-extern AVCodecParser ff_ac3_parser;
-extern AVCodecParser ff_adx_parser;
-extern AVCodecParser ff_bmp_parser;
-extern AVCodecParser ff_cavsvideo_parser;
-extern AVCodecParser ff_cook_parser;
-extern AVCodecParser ff_dca_parser;
-extern AVCodecParser ff_dirac_parser;
-extern AVCodecParser ff_dnxhd_parser;
-extern AVCodecParser ff_dpx_parser;
-extern AVCodecParser ff_dvaudio_parser;
-extern AVCodecParser ff_dvbsub_parser;
-extern AVCodecParser ff_dvdsub_parser;
-extern AVCodecParser ff_dvd_nav_parser;
-extern AVCodecParser ff_flac_parser;
-extern AVCodecParser ff_g729_parser;
-extern AVCodecParser ff_gsm_parser;
-extern AVCodecParser ff_h261_parser;
-extern AVCodecParser ff_h263_parser;
-extern AVCodecParser ff_h264_parser;
-extern AVCodecParser ff_hevc_parser;
-extern AVCodecParser ff_mjpeg_parser;
-extern AVCodecParser ff_mlp_parser;
-extern AVCodecParser ff_mpeg4video_parser;
-extern AVCodecParser ff_mpegaudio_parser;
-extern AVCodecParser ff_mpegvideo_parser;
-extern AVCodecParser ff_opus_parser;
-extern AVCodecParser ff_png_parser;
-extern AVCodecParser ff_pnm_parser;
-extern AVCodecParser ff_rv30_parser;
-extern AVCodecParser ff_rv40_parser;
-extern AVCodecParser ff_sbc_parser;
-extern AVCodecParser ff_sipr_parser;
-extern AVCodecParser ff_tak_parser;
-extern AVCodecParser ff_vc1_parser;
-extern AVCodecParser ff_vorbis_parser;
-extern AVCodecParser ff_vp3_parser;
-extern AVCodecParser ff_vp8_parser;
-extern AVCodecParser ff_vp9_parser;
-extern AVCodecParser ff_xma_parser;
-
-#include "libavcodec/parser_list.c"
-
-static AVOnce av_parser_next_init = AV_ONCE_INIT;
-
-static void av_parser_init_next(void)
-{
-    AVCodecParser *prev = NULL, *p;
-    int i = 0;
-    while ((p = (AVCodecParser*)parser_list[i++])) {
-        if (prev)
-            prev->next = p;
-        prev = p;
-    }
-}
-
-AVCodecParser *av_parser_next(const AVCodecParser *p)
-{
-    ff_thread_once(&av_parser_next_init, av_parser_init_next);
-
-    if (p)
-        return p->next;
-    else
-        return (AVCodecParser*)parser_list[0];
-}
-
-const AVCodecParser *av_parser_iterate(void **opaque)
-{
-    uintptr_t i = (uintptr_t)*opaque;
-    const AVCodecParser *p = parser_list[i];
-
-    if (p)
-        *opaque = (void*)(i + 1);
-
-    return p;
-}
-
-void av_register_codec_parser(AVCodecParser *parser)
-{
-    ff_thread_once(&av_parser_next_init, av_parser_init_next);
-}
-
 AVCodecParserContext *av_parser_init(int codec_id)
 {
     AVCodecParserContext *s = NULL;

libavcodec/parsers.c

@@ -0,0 +1,106 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+
+#include "libavutil/thread.h"
+
+#include "avcodec.h"
+
+extern AVCodecParser ff_aac_parser;
+extern AVCodecParser ff_aac_latm_parser;
+extern AVCodecParser ff_ac3_parser;
+extern AVCodecParser ff_adx_parser;
+extern AVCodecParser ff_bmp_parser;
+extern AVCodecParser ff_cavsvideo_parser;
+extern AVCodecParser ff_cook_parser;
+extern AVCodecParser ff_dca_parser;
+extern AVCodecParser ff_dirac_parser;
+extern AVCodecParser ff_dnxhd_parser;
+extern AVCodecParser ff_dpx_parser;
+extern AVCodecParser ff_dvaudio_parser;
+extern AVCodecParser ff_dvbsub_parser;
+extern AVCodecParser ff_dvdsub_parser;
+extern AVCodecParser ff_dvd_nav_parser;
+extern AVCodecParser ff_flac_parser;
+extern AVCodecParser ff_g729_parser;
+extern AVCodecParser ff_gsm_parser;
+extern AVCodecParser ff_h261_parser;
+extern AVCodecParser ff_h263_parser;
+extern AVCodecParser ff_h264_parser;
+extern AVCodecParser ff_hevc_parser;
+extern AVCodecParser ff_mjpeg_parser;
+extern AVCodecParser ff_mlp_parser;
+extern AVCodecParser ff_mpeg4video_parser;
+extern AVCodecParser ff_mpegaudio_parser;
+extern AVCodecParser ff_mpegvideo_parser;
+extern AVCodecParser ff_opus_parser;
+extern AVCodecParser ff_png_parser;
+extern AVCodecParser ff_pnm_parser;
+extern AVCodecParser ff_rv30_parser;
+extern AVCodecParser ff_rv40_parser;
+extern AVCodecParser ff_sbc_parser;
+extern AVCodecParser ff_sipr_parser;
+extern AVCodecParser ff_tak_parser;
+extern AVCodecParser ff_vc1_parser;
+extern AVCodecParser ff_vorbis_parser;
+extern AVCodecParser ff_vp3_parser;
+extern AVCodecParser ff_vp8_parser;
+extern AVCodecParser ff_vp9_parser;
+extern AVCodecParser ff_xma_parser;
+
+#include "libavcodec/parser_list.c"
+
+static AVOnce av_parser_next_init = AV_ONCE_INIT;
+
+static void av_parser_init_next(void)
+{
+    AVCodecParser *prev = NULL, *p;
+    int i = 0;
+    while ((p = (AVCodecParser*)parser_list[i++])) {
+        if (prev)
+            prev->next = p;
+        prev = p;
+    }
+}
+
+AVCodecParser *av_parser_next(const AVCodecParser *p)
+{
+    ff_thread_once(&av_parser_next_init, av_parser_init_next);
+
+    if (p)
+        return p->next;
+    else
+        return (AVCodecParser*)parser_list[0];
+}
+
+const AVCodecParser *av_parser_iterate(void **opaque)
+{
+    uintptr_t i = (uintptr_t)*opaque;
+    const AVCodecParser *p = parser_list[i];
+
+    if (p)
+        *opaque = (void*)(i + 1);
+
+    return p;
+}
+
+void av_register_codec_parser(AVCodecParser *parser)
+{
+    ff_thread_once(&av_parser_next_init, av_parser_init_next);
+}