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Diffstat (limited to '')
| -rw-r--r-- | media/ffvpx/libavutil/utils.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/media/ffvpx/libavutil/utils.c b/media/ffvpx/libavutil/utils.c new file mode 100644 index 0000000000..230081ea47 --- /dev/null +++ b/media/ffvpx/libavutil/utils.c @@ -0,0 +1,160 @@ +/* + * 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" +#include "samplefmt.h" +#include "internal.h" + +/** + * @file + * various utility functions + */ + +#include "libavutil/ffversion.h" +const char av_util_ffversion[] = "FFmpeg version " FFMPEG_VERSION; + +const char *av_version_info(void) +{ + return FFMPEG_VERSION; +} + +unsigned avutil_version(void) +{ + static int checks_done; + if (checks_done) + return LIBAVUTIL_VERSION_INT; + + av_assert0(AV_SAMPLE_FMT_DBLP == 9); + av_assert0(AVMEDIA_TYPE_ATTACHMENT == 4); + av_assert0(AV_PICTURE_TYPE_BI == 7); + av_assert0(LIBAVUTIL_VERSION_MICRO >= 100); + av_assert0(HAVE_MMX2 == HAVE_MMXEXT); + + av_assert0(((size_t)-1) > 0); // C guarantees this but if false on a platform we care about revert at least b284e1ffe343d6697fb950d1ee517bafda8a9844 + + if (av_sat_dadd32(1, 2) != 5) { + av_log(NULL, AV_LOG_FATAL, "Libavutil has been built with a broken binutils, please upgrade binutils and rebuild\n"); + abort(); + } + + if (llrint(1LL<<60) != 1LL<<60) { + av_log(NULL, AV_LOG_ERROR, "Libavutil has been linked to a broken llrint()\n"); + } + + checks_done = 1; + return LIBAVUTIL_VERSION_INT; +} + +const char *avutil_configuration(void) +{ + return FFMPEG_CONFIGURATION; +} + +const char *avutil_license(void) +{ +#define LICENSE_PREFIX "libavutil license: " + return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; +} + +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 +} |