avcodec: Constify AVCodecs

[ffmpeg] / libavcodec / mpeg4videoenc.c

diff --git a/libavcodec/mpeg4videoenc.c b/libavcodec/mpeg4videoenc.c
index 2bf65305ad9299e87674e8dbea8b136c598185ae..b77653d453bb2fa828b85fc1d1d2b0f6cfdd8810 100644 (file)
--- a/libavcodec/mpeg4videoenc.c
+++ b/libavcodec/mpeg4videoenc.c
@@ -23,6 +23,7 @@
 #include "libavutil/attributes.h"
 #include "libavutil/log.h"
 #include "libavutil/opt.h"
+#include "libavutil/thread.h"
 #include "mpegutils.h"
 #include "mpegvideo.h"
 #include "h263.h"
@@ -1266,11 +1267,21 @@ static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab,
     }
 }
 
+static av_cold void mpeg4_encode_init_static(void)
+{
+    init_uni_dc_tab();
+
+    ff_mpeg4_init_rl_intra();
+
+    init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
+    init_uni_mpeg4_rl_tab(&ff_h263_rl_inter,  uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
+}
+
 static av_cold int encode_init(AVCodecContext *avctx)
 {
+    static AVOnce init_static_once = AV_ONCE_INIT;
     MpegEncContext *s = avctx->priv_data;
     int ret;
-    static int done = 0;
 
     if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) {
         av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n");
@@ -1280,16 +1291,7 @@ static av_cold int encode_init(AVCodecContext *avctx)
     if ((ret = ff_mpv_encode_init(avctx)) < 0)
         return ret;
 
-    if (!done) {
-        done = 1;
-
-        init_uni_dc_tab();
-
-        ff_rl_init(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
-
-        init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
-        init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
-    }
+    ff_thread_once(&init_static_once, mpeg4_encode_init_static);
 
     s->min_qcoeff               = -2048;
     s->max_qcoeff               = 2047;
@@ -1375,7 +1377,14 @@ void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
 static const AVOption options[] = {
     { "data_partitioning", "Use data partitioning.",      OFFSET(data_partitioning), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
     { "alternate_scan",    "Enable alternate scantable.", OFFSET(alternate_scan),    AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
+    { "mpeg_quant",        "Use MPEG quantizers instead of H.263",
+      OFFSET(mpeg_quant), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, VE },
+    FF_MPV_COMMON_BFRAME_OPTS
     FF_MPV_COMMON_OPTS
+#if FF_API_MPEGVIDEO_OPTS
+    FF_MPV_DEPRECATED_A53_CC_OPT
+    FF_MPV_DEPRECATED_MATRIX_OPT
+#endif
     FF_MPEG4_PROFILE_OPTS
     { NULL },
 };
@@ -1387,7 +1396,7 @@ static const AVClass mpeg4enc_class = {
     .version    = LIBAVUTIL_VERSION_INT,
 };
 
-AVCodec ff_mpeg4_encoder = {
+const AVCodec ff_mpeg4_encoder = {
     .name           = "mpeg4",
     .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
     .type           = AVMEDIA_TYPE_VIDEO,
@@ -1398,6 +1407,6 @@ AVCodec ff_mpeg4_encoder = {
     .close          = ff_mpv_encode_end,
     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
-    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
     .priv_class     = &mpeg4enc_class,
 };