lavc/h264_levels: add MaxMBPS checking and update fate test.

1. add MaxMBPS checking for level idc setting to align with AVC spec
   AnnexA table A-1/A-6 level limits.
2. update h264 level fate test.

Signed-off-by: Decai Lin <decai.lin@intel.com>
Signed-off-by: Mark Thompson <sw@jkqxz.net>

libavcodec/h264_levels.c

@@ -89,6 +89,7 @@ const H264LevelDescriptor *ff_h264_get_level(int level_idc,
 
 const H264LevelDescriptor *ff_h264_guess_level(int profile_idc,
                                                int64_t bitrate,
+                                               int framerate,
                                                int width, int height,
                                                int max_dec_frame_buffering)
 {
@@ -120,6 +121,9 @@ const H264LevelDescriptor *ff_h264_guess_level(int profile_idc,
                 FFMIN(level->max_dpb_mbs / (width_mbs * height_mbs), 16);
             if (max_dec_frame_buffering > max_dpb_frames)
                 continue;
+
+            if (framerate > (level->max_mbps / (width_mbs * height_mbs)))
+                continue;
         }
 
         return level;

libavcodec/h264_levels.h

@@ -46,6 +46,7 @@ const H264LevelDescriptor *ff_h264_get_level(int level_idc,
  */
 const H264LevelDescriptor *ff_h264_guess_level(int profile_idc,
                                                int64_t bitrate,
+                                               int framerate,
                                                int width, int height,
                                                int max_dec_frame_buffering);
 

libavcodec/h264_metadata_bsf.c

@@ -223,6 +223,7 @@ static int h264_metadata_update_sps(AVBSFContext *bsf,
             const H264LevelDescriptor *desc;
             int64_t bit_rate;
             int width, height, dpb_frames;
+            int framerate;
 
             if (sps->vui.nal_hrd_parameters_present_flag) {
                 bit_rate = (sps->vui.nal_hrd_parameters.bit_rate_value_minus1[0] + 1) *
@@ -244,7 +245,12 @@ static int h264_metadata_update_sps(AVBSFContext *bsf,
             height = 16 * (sps->pic_height_in_map_units_minus1 + 1) *
                 (2 - sps->frame_mbs_only_flag);
 
-            desc = ff_h264_guess_level(sps->profile_idc, bit_rate,
+            if (sps->vui.timing_info_present_flag)
+                framerate = sps->vui.time_scale / sps->vui.num_units_in_tick / 2;
+            else
+                framerate = 0;
+
+            desc = ff_h264_guess_level(sps->profile_idc, bit_rate, framerate,
                                        width, height, dpb_frames);
             if (desc) {
                 level_idc = desc->level_idc;

libavcodec/tests/h264_levels.c

@@ -59,6 +59,48 @@ static const struct {
     { 16896,   1,  0 },
 };
 
+static const struct {
+    int width;
+    int height;
+    int framerate;
+    int level_idc;
+} test_framerate[] = {
+    // Some typical sizes and frame rates.
+    // (From H.264 table A-1 and table A-6)
+    {  176,  144,  15, 10 },
+    {  176,  144,  16, 11 },
+    {  320,  240,  10, 11 },
+    {  320,  240,  20, 12 },
+    {  320,  240,  40, 21 },
+    {  352,  288,  30, 13 },
+    {  352,  288,  51, 22 },
+    {  352,  576,  25, 21 },
+    {  352,  576,  26, 30 },
+    {  640,  480,  33, 30 },
+    {  640,  480,  34, 31 },
+    {  720,  480,  50, 31 },
+    {  720,  576,  25, 30 },
+    {  800,  600,  55, 31 },
+    { 1024,  768,  35, 31 },
+    { 1024,  768,  70, 32 },
+    { 1280,  720,  30, 31 },
+    { 1280,  720,  31, 32 },
+    { 1280,  960,  45, 32 },
+    { 1280,  960,  46, 40 },
+    { 1280, 1024,  42, 32 },
+    { 1600, 1200,  32, 40 },
+    { 1600, 1200,  33, 42 },
+    { 1920, 1088,  30, 40 },
+    { 1920, 1088,  55, 42 },
+    { 2048, 1024,  30, 40 },
+    { 2048, 1024,  62, 42 },
+    { 2048, 1088,  60, 42 },
+    { 3680, 1536,  26, 50 },
+    { 4096, 2048,  30, 51 },
+    { 4096, 2048,  59, 52 },
+    { 4096, 2160,  60, 52 },
+};
+
 static const struct {
     int width;
     int height;
@@ -147,14 +189,23 @@ int main(void)
     } while (0)
 
     for (i = 0; i < FF_ARRAY_ELEMS(test_sizes); i++) {
-        level = ff_h264_guess_level(0, 0, test_sizes[i].width,
+        level = ff_h264_guess_level(0, 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_framerate); i++) {
+        level = ff_h264_guess_level(0, 0, test_framerate[i].framerate,
+                                    test_framerate[i].width,
+                                    test_framerate[i].height, 0);
+        CHECK(test_framerate[i].level_idc, "framerate %d, size %dx%d",
+              test_framerate[i].framerate, test_framerate[i].width,
+              test_framerate[i].height);
+    }
+
     for (i = 0; i < FF_ARRAY_ELEMS(test_dpb); i++) {
-        level = ff_h264_guess_level(0, 0, test_dpb[i].width,
+        level = ff_h264_guess_level(0, 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",
@@ -165,7 +216,7 @@ int main(void)
     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);
+                                    0, 0, 0, 0);
         CHECK(test_bitrate[i].level_idc, "bitrate %"PRId64" profile %d",
               test_bitrate[i].bitrate, test_bitrate[i].profile_idc);
     }
@@ -173,6 +224,7 @@ int main(void)
     for (i = 0; i < FF_ARRAY_ELEMS(test_all); i++) {
         level = ff_h264_guess_level(test_all[i].profile_idc,
                                     test_all[i].bitrate,
+                                    0,
                                     test_all[i].width,
                                     test_all[i].height,
                                     test_all[i].dpb_frames);

libavcodec/vaapi_encode_h264.c

@@ -329,9 +329,16 @@ static int vaapi_encode_h264_init_sequence_params(AVCodecContext *avctx)
         sps->level_idc = avctx->level;
     } else {
         const H264LevelDescriptor *level;
+        int framerate;
+
+        if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
+            framerate = avctx->framerate.num / avctx->framerate.den;
+        else
+            framerate = 0;
 
         level = ff_h264_guess_level(sps->profile_idc,
                                     avctx->bit_rate,
+                                    framerate,
                                     priv->mb_width  * 16,
                                     priv->mb_height * 16,
                                     priv->dpb_frames);