lavc/h264: Add common code for level handling

Including a unit test.

1 files changed, 53 insertions, 0 deletions

diff --git a/libavcodec/h264_levels.h b/libavcodec/h264_levels.h
new file mode 100644
index 0000000000..4189fc61c2
--- /dev/null
+++ b/libavcodec/h264_levels.h
@@ -0,0 +1,53 @@
+/*
+ * 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
+ */
+
+#ifndef AVCODEC_H264_LEVELS_H
+#define AVCODEC_H264_LEVELS_H
+
+
+#include <stdint.h>
+
+typedef struct H264LevelDescriptor {
+    const char *name;
+    uint8_t     level_idc;
+    uint8_t     constraint_set3_flag;
+    uint32_t    max_mbps;
+    uint32_t    max_fs;
+    uint32_t    max_dpb_mbs;
+    uint32_t    max_br;
+    uint32_t    max_cpb;
+    uint16_t    max_v_mv_r;
+    uint8_t     min_cr;
+    uint8_t     max_mvs_per_2mb;
+} H264LevelDescriptor;
+
+const H264LevelDescriptor *ff_h264_get_level(int level_idc,
+                                             int constraint_set3_flag);
+
+/**
+ * Guess the level of a stream from some parameters.
+ *
+ * Unknown parameters may be zero, in which case they are ignored.
+ */
+const H264LevelDescriptor *ff_h264_guess_level(int profile_idc,
+                                               int64_t bitrate,
+                                               int width, int height,
+                                               int max_dec_frame_buffering);
+
+
+#endif /* AVCODEC_H264_LEVELS_H */