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-rw-r--r--media/ffvpx/libavutil/utils.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/media/ffvpx/libavutil/utils.c b/media/ffvpx/libavutil/utils.c
new file mode 100644
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+++ b/media/ffvpx/libavutil/utils.c
@@ -0,0 +1,112 @@
+/*
+ * 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 "config.h"
+#include "avutil.h"
+#include "avassert.h"
+
+/**
+ * @file
+ * various utility functions
+ */
+
+const char *av_get_media_type_string(enum AVMediaType media_type)
+{
+ switch (media_type) {
+ case AVMEDIA_TYPE_VIDEO: return "video";
+ case AVMEDIA_TYPE_AUDIO: return "audio";
+ case AVMEDIA_TYPE_DATA: return "data";
+ case AVMEDIA_TYPE_SUBTITLE: return "subtitle";
+ case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
+ default: return NULL;
+ }
+}
+
+char av_get_picture_type_char(enum AVPictureType pict_type)
+{
+ switch (pict_type) {
+ case AV_PICTURE_TYPE_I: return 'I';
+ case AV_PICTURE_TYPE_P: return 'P';
+ case AV_PICTURE_TYPE_B: return 'B';
+ case AV_PICTURE_TYPE_S: return 'S';
+ case AV_PICTURE_TYPE_SI: return 'i';
+ case AV_PICTURE_TYPE_SP: return 'p';
+ case AV_PICTURE_TYPE_BI: return 'b';
+ default: return '?';
+ }
+}
+
+unsigned av_int_list_length_for_size(unsigned elsize,
+ const void *list, uint64_t term)
+{
+ unsigned i;
+
+ if (!list)
+ return 0;
+#define LIST_LENGTH(type) \
+ { type t = term, *l = (type *)list; for (i = 0; l[i] != t; i++); }
+ switch (elsize) {
+ case 1: LIST_LENGTH(uint8_t); break;
+ case 2: LIST_LENGTH(uint16_t); break;
+ case 4: LIST_LENGTH(uint32_t); break;
+ case 8: LIST_LENGTH(uint64_t); break;
+ default: av_assert0(!"valid element size");
+ }
+ return i;
+}
+
+char *av_fourcc_make_string(char *buf, uint32_t fourcc)
+{
+ int i;
+ char *orig_buf = buf;
+ size_t buf_size = AV_FOURCC_MAX_STRING_SIZE;
+
+ for (i = 0; i < 4; i++) {
+ const int c = fourcc & 0xff;
+ const int print_chr = (c >= '0' && c <= '9') ||
+ (c >= 'a' && c <= 'z') ||
+ (c >= 'A' && c <= 'Z') ||
+ (c && strchr(". -_", c));
+ const int len = snprintf(buf, buf_size, print_chr ? "%c" : "[%d]", c);
+ if (len < 0)
+ break;
+ buf += len;
+ buf_size = buf_size > len ? buf_size - len : 0;
+ fourcc >>= 8;
+ }
+
+ return orig_buf;
+}
+
+AVRational av_get_time_base_q(void)
+{
+ return (AVRational){1, AV_TIME_BASE};
+}
+
+void av_assert0_fpu(void) {
+#if HAVE_MMX_INLINE
+ uint16_t state[14];
+ __asm__ volatile (
+ "fstenv %0 \n\t"
+ : "+m" (state)
+ :
+ : "memory"
+ );
+ av_assert0((state[4] & 3) == 3);
+#endif
+}