@@ -355,7 +355,7 @@ OBJS-$(CONFIG_H264_OMX_ENCODER) += omx.o
OBJS-$(CONFIG_H264_QSV_DECODER) += qsvdec_h2645.o
OBJS-$(CONFIG_H264_QSV_ENCODER) += qsvenc_h264.o
OBJS-$(CONFIG_H264_RKMPP_DECODER) += rkmppdec.o
-OBJS-$(CONFIG_H264_VAAPI_ENCODER) += vaapi_encode_h264.o
+OBJS-$(CONFIG_H264_VAAPI_ENCODER) += h264_levels.o vaapi_encode_h264.o
OBJS-$(CONFIG_H264_VIDEOTOOLBOX_ENCODER) += videotoolboxenc.o
OBJS-$(CONFIG_H264_V4L2M2M_DECODER) += v4l2_m2m_dec.o
OBJS-$(CONFIG_H264_V4L2M2M_ENCODER) += v4l2_m2m_enc.o
@@ -1134,6 +1134,7 @@ TESTPROGS-$(CONFIG_IDCTDSP) += dct
TESTPROGS-$(CONFIG_IIRFILTER) += iirfilter
TESTPROGS-$(HAVE_MMX) += motion
TESTPROGS-$(CONFIG_MPEGVIDEO) += mpeg12framerate
+TESTPROGS-$(CONFIG_H264_VAAPI_ENCODER) += h264_levels
TESTPROGS-$(CONFIG_RANGECODER) += rangecoder
TESTPROGS-$(CONFIG_SNOW_ENCODER) += snowenc
new file mode 100644
@@ -0,0 +1,130 @@
+/*
+ * 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 "avcodec.h"
+#include "h264_levels.h"
+
+// H.264 table A-1.
+static const H264LevelDescriptor h264_levels[] = {
+ // Name MaxMBPS MaxBR MinCR
+ // | level_idc | MaxFS | MaxCPB | MaxMvsPer2Mb
+ // | | cs3f | | MaxDpbMbs | | MaxVmvR | |
+ { "1", 10, 0, 1485, 99, 396, 64, 175, 64, 2, 0 },
+ { "1b", 10, 1, 1485, 99, 396, 128, 350, 64, 2, 0 },
+ { "1b", 9, 0, 1485, 99, 396, 128, 350, 64, 2, 0 },
+ { "1.1", 11, 0, 3000, 396, 900, 192, 500, 128, 2, 0 },
+ { "1.2", 12, 0, 6000, 396, 2376, 384, 1000, 128, 2, 0 },
+ { "1.3", 13, 0, 11880, 396, 2376, 768, 2000, 128, 2, 0 },
+ { "2", 20, 0, 11880, 396, 2376, 2000, 2000, 128, 2, 0 },
+ { "2.1", 21, 0, 19800, 792, 4752, 4000, 4000, 256, 2, 0 },
+ { "2.2", 22, 0, 20250, 1620, 8100, 4000, 4000, 256, 2, 0 },
+ { "3", 30, 0, 40500, 1620, 8100, 10000, 10000, 256, 2, 32 },
+ { "3.1", 31, 0, 108000, 3600, 18000, 14000, 14000, 512, 4, 16 },
+ { "3.2", 32, 0, 216000, 5120, 20480, 20000, 20000, 512, 4, 16 },
+ { "4", 40, 0, 245760, 8192, 32768, 20000, 25000, 512, 4, 16 },
+ { "4.1", 41, 0, 245760, 8192, 32768, 50000, 62500, 512, 2, 16 },
+ { "4.2", 42, 0, 522240, 8704, 34816, 50000, 62500, 512, 2, 16 },
+ { "5", 50, 0, 589824, 22080, 110400, 135000, 135000, 512, 2, 16 },
+ { "5.1", 51, 0, 983040, 36864, 184320, 240000, 240000, 512, 2, 16 },
+ { "5.2", 52, 0, 2073600, 36864, 184320, 240000, 240000, 512, 2, 16 },
+ { "6", 60, 0, 4177920, 139264, 696320, 240000, 240000, 8192, 2, 16 },
+ { "6.1", 61, 0, 8355840, 139264, 696320, 480000, 480000, 8192, 2, 16 },
+ { "6.2", 62, 0, 16711680, 139264, 696320, 800000, 800000, 8192, 2, 16 },
+};
+
+// H.264 table A-2 plus values from A-1.
+static const struct {
+ int profile_idc;
+ int cpb_br_vcl_factor;
+ int cpb_br_nal_factor;
+} h264_br_factors[] = {
+ { 66, 1000, 1200 },
+ { 77, 1000, 1200 },
+ { 88, 1000, 1200 },
+ { 100, 1250, 1500 },
+ { 110, 3000, 3600 },
+ { 122, 4000, 4800 },
+ { 244, 4000, 4800 },
+ { 44, 4000, 4800 },
+};
+
+// We are only ever interested in the NAL bitrate factor.
+static int h264_get_br_factor(int profile_idc)
+{
+ int i;
+ for (i = 0; i < FF_ARRAY_ELEMS(h264_br_factors); i++) {
+ if (h264_br_factors[i].profile_idc == profile_idc)
+ return h264_br_factors[i].cpb_br_nal_factor;
+ }
+ // Default to the non-high profile value if not specified.
+ return 1200;
+}
+
+const H264LevelDescriptor *ff_h264_get_level(int level_idc,
+ int constraint_set3_flag)
+{
+ int i;
+ for (i = 0; i < FF_ARRAY_ELEMS(h264_levels); i++) {
+ if (h264_levels[i].level_idc == level_idc &&
+ h264_levels[i].constraint_set3_flag == constraint_set3_flag)
+ return &h264_levels[i];
+ }
+ return NULL;
+}
+
+const H264LevelDescriptor *ff_h264_guess_level(int profile_idc,
+ int64_t bitrate,
+ int width, int height,
+ int max_dec_frame_buffering)
+{
+ int width_mbs = (width + 15) / 16;
+ int height_mbs = (height + 15) / 16;
+ int no_cs3f = !(profile_idc == 66 ||
+ profile_idc == 77 ||
+ profile_idc == 88);
+ int i;
+
+ for (i = 0; i < FF_ARRAY_ELEMS(h264_levels); i++) {
+ const H264LevelDescriptor *level = &h264_levels[i];
+
+ if (level->constraint_set3_flag && no_cs3f)
+ continue;
+
+ if (bitrate > level->max_br * h264_get_br_factor(profile_idc))
+ continue;
+
+ if (width_mbs * height_mbs > level->max_fs)
+ continue;
+ if (width_mbs * width_mbs > 8 * level->max_fs)
+ continue;
+ if (height_mbs * height_mbs > 8 * level->max_fs)
+ continue;
+
+ if (width_mbs && height_mbs) {
+ int max_dpb_frames =
+ FFMIN(level->max_dpb_mbs / (width_mbs * height_mbs), 16);
+ if (max_dec_frame_buffering > max_dpb_frames)
+ continue;
+ }
+
+ return level;
+ }
+
+ // No usable levels found - frame is too big or bitrate is too high.
+ return NULL;
+}
new file mode 100644
@@ -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 */
@@ -7,6 +7,7 @@
/fft-fixed
/fft-fixed32
/golomb
+/h264_levels
/htmlsubtitles
/iirfilter
/imgconvert
new file mode 100644
@@ -0,0 +1,183 @@
+/*
+ * 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 "libavutil/common.h"
+#include "libavcodec/h264_levels.h"
+
+static const struct {
+ int width;
+ int height;
+ int level_idc;
+} test_sizes[] = {
+ // First level usable at some standard sizes.
+ // (From H.264 table A-6.)
+ { 176, 144, 10 }, // QCIF
+ { 352, 288, 11 }, // CIF
+ { 640, 480, 22 }, // VGA
+ { 720, 480, 22 }, // NTSC
+ { 720, 576, 22 }, // PAL
+ { 800, 600, 31 }, // SVGA
+ { 1280, 720, 31 }, // 720p
+ { 1280, 1024, 32 }, // SXGA
+ { 1920, 1080, 40 }, // 1080p
+ { 2048, 1080, 42 }, // 2Kx1080
+ { 2048, 1536, 50 }, // 4XGA
+ { 3840, 2160, 51 }, // 4K
+ { 7680, 4320, 60 }, // 8K
+
+ // Overly wide or tall sizes.
+ { 1, 256, 10 },
+ { 1, 512, 11 },
+ { 1, 1024, 21 },
+ { 1, 1808, 22 },
+ { 1, 1824, 31 },
+ { 256, 1, 10 },
+ { 512, 1, 11 },
+ { 1024, 1, 21 },
+ { 1808, 1, 22 },
+ { 1824, 1, 31 },
+ { 512, 4096, 40 },
+ { 256, 4112, 42 },
+ { 8688, 1024, 51 },
+ { 8704, 512, 60 },
+ { 16880, 1, 60 },
+ { 16896, 1, 0 },
+};
+
+static const struct {
+ int width;
+ int height;
+ int dpb_size;
+ int level_idc;
+} test_dpb[] = {
+ // First level usable for some DPB sizes.
+ // (From H.264 table A-7.)
+ { 176, 144, 4, 10 },
+ { 176, 144, 8, 11 },
+ { 176, 144, 16, 12 },
+ { 1280, 720, 1, 31 },
+ { 1280, 720, 5, 31 },
+ { 1280, 720, 9, 40 },
+ { 1280, 720, 10, 50 },
+ { 1920, 1080, 1, 40 },
+ { 1920, 1080, 5, 50 },
+ { 1920, 1080, 13, 50 },
+ { 1920, 1080, 14, 51 },
+ { 3840, 2160, 5, 51 },
+ { 3840, 2160, 6, 60 },
+ { 3840, 2160, 16, 60 },
+ { 7680, 4320, 5, 60 },
+ { 7680, 4320, 6, 0 },
+};
+
+static const struct {
+ int64_t bitrate;
+ int profile_idc;
+ int level_idc;
+} test_bitrate[] = {
+ // Values where profile affects level at a given bitrate.
+ { 2500000, 77, 21 },
+ { 2500000, 100, 20 },
+ { 2500000, 244, 13 },
+ { 100000000, 77, 50 },
+ { 100000000, 100, 50 },
+ { 100000000, 244, 41 },
+ { 999999999, 77, 0 },
+ { 999999999, 100, 62 },
+ // Check level 1b.
+ { 32 * 1200, 66, 10 },
+ { 32 * 1500, 100, 10 },
+ { 96 * 1200, 66, 10 },
+ { 96 * 1500, 100, 9 },
+ { 144 * 1200, 66, 11 },
+ { 144 * 1500, 100, 11 },
+};
+
+static const struct {
+ const char *name;
+ int profile_idc;
+ int64_t bitrate;
+ int width;
+ int height;
+ int dpb_frames;
+ int level_idc;
+} test_all[] = {
+ { "Bluray 1080p 40Mb/s", 100, 40000000, 1920, 1080, 4, 41 },
+ { "Bluray 1080p 24Mb/s", 100, 24000000, 1920, 1080, 4, 40 },
+ { "Bluray 720p 40Mb/s", 100, 40000000, 1280, 720, 6, 41 },
+ { "Bluray 720p 24Mb/s", 100, 24000000, 1280, 720, 6, 40 },
+ { "Bluray PAL 40Mb/s", 100, 40000000, 720, 576, 6, 41 },
+ { "Bluray PAL 24Mb/s", 100, 24000000, 720, 576, 6, 32 },
+ { "Bluray PAL 16Mb/s", 100, 16800000, 720, 576, 6, 31 },
+ { "Bluray PAL 12Mb/s", 100, 12000000, 720, 576, 5, 30 },
+ { "Bluray NTSC 40Mb/s", 100, 40000000, 720, 480, 6, 41 },
+ { "Bluray NTSC 24Mb/s", 100, 24000000, 720, 480, 6, 32 },
+ { "Bluray NTSC 16Mb/s", 100, 16800000, 720, 480, 6, 31 },
+ { "Bluray NTSC 12Mb/s", 100, 12000000, 720, 480, 6, 30 },
+};
+
+int main(void)
+{
+ const H264LevelDescriptor *level;
+ int i;
+
+#define CHECK(expected, format, ...) do { \
+ if (expected ? (!level || level->level_idc != expected) \
+ : !!level) { \
+ av_log(NULL, AV_LOG_ERROR, "Incorrect level for " \
+ format ": expected %d, got %d.\n", __VA_ARGS__, \
+ expected, level ? level->level_idc : -1); \
+ return 1; \
+ } \
+ } while (0)
+
+ for (i = 0; i < FF_ARRAY_ELEMS(test_sizes); i++) {
+ level = ff_h264_guess_level(0, 0, test_sizes[i].width,
+ test_sizes[i].height, 0);
+ CHECK(test_sizes[i].level_idc, "size %dx%d",
+ test_sizes[i].width, test_sizes[i].height);
+ }
+
+ for (i = 0; i < FF_ARRAY_ELEMS(test_dpb); i++) {
+ level = ff_h264_guess_level(0, 0, test_dpb[i].width,
+ test_dpb[i].height,
+ test_dpb[i].dpb_size);
+ CHECK(test_dpb[i].level_idc, "size %dx%d dpb %d",
+ test_dpb[i].width, test_dpb[i].height,
+ test_dpb[i].dpb_size);
+ }
+
+ for (i = 0; i < FF_ARRAY_ELEMS(test_bitrate); i++) {
+ level = ff_h264_guess_level(test_bitrate[i].profile_idc,
+ test_bitrate[i].bitrate,
+ 0, 0, 0);
+ CHECK(test_bitrate[i].level_idc, "bitrate %"PRId64" profile %d",
+ test_bitrate[i].bitrate, test_bitrate[i].profile_idc);
+ }
+
+ for (i = 0; i < FF_ARRAY_ELEMS(test_all); i++) {
+ level = ff_h264_guess_level(test_all[i].profile_idc,
+ test_all[i].bitrate,
+ test_all[i].width,
+ test_all[i].height,
+ test_all[i].dpb_frames);
+ CHECK(test_all[i].level_idc, "%s", test_all[i].name);
+ }
+
+ return 0;
+}
@@ -46,6 +46,11 @@ fate-dct8x8: libavcodec/tests/dct$(EXESUF)
fate-dct8x8: CMD = run libavcodec/tests/dct
fate-dct8x8: CMP = null
+FATE_LIBAVCODEC-$(CONFIG_H264_VAAPI_ENCODER) += fate-h264-levels
+fate-h264-levels: libavcodec/tests/h264_levels$(EXESUF)
+fate-h264-levels: CMD = run libavcodec/tests/h264_levels
+fate-h264-levels: REF = /dev/null
+
FATE_LIBAVCODEC-$(CONFIG_IIRFILTER) += fate-iirfilter
fate-iirfilter: libavcodec/tests/iirfilter$(EXESUF)
fate-iirfilter: CMD = run libavcodec/tests/iirfilter