h265_metadata: Add option to set the level of the stream

To match the same option in h264_metadata.

1 files changed, 136 insertions, 0 deletions

diff --git a/libavcodec/h265_metadata_bsf.c b/libavcodec/h265_metadata_bsf.c
index 0683cc2f9d..c7a635ebe2 100644
--- a/libavcodec/h265_metadata_bsf.c
+++ b/libavcodec/h265_metadata_bsf.c
@@ -23,6 +23,7 @@
 #include "cbs.h"
 #include "cbs_h265.h"
 #include "hevc.h"
+#include "h265_profile_level.h"
 
 enum {
     PASS,
@@ -30,6 +31,11 @@ enum {
     REMOVE,
 };
 
+enum {
+    LEVEL_UNSET = -2,
+    LEVEL_AUTO  = -1,
+};
+
 typedef struct H265MetadataContext {
     const AVClass *class;
 
@@ -58,9 +64,105 @@ typedef struct H265MetadataContext {
     int crop_right;
     int crop_top;
     int crop_bottom;
+
+    int level;
+    int level_guess;
+    int level_warned;
 } H265MetadataContext;
 
 
+static void h265_metadata_guess_level(AVBSFContext *bsf,
+                                      const CodedBitstreamFragment *au)
+{
+    H265MetadataContext *ctx = bsf->priv_data;
+    const H265LevelDescriptor *desc;
+    const H265RawProfileTierLevel *ptl = NULL;
+    const H265RawHRDParameters    *hrd = NULL;
+    int64_t bit_rate = 0;
+    int width = 0, height = 0;
+    int tile_cols = 0, tile_rows = 0;
+    int max_dec_pic_buffering = 0;
+    int i;
+
+    for (i = 0; i < au->nb_units; i++) {
+        const CodedBitstreamUnit *unit = &au->units[i];
+
+        if (unit->type == HEVC_NAL_VPS) {
+            const H265RawVPS *vps = unit->content;
+
+            ptl = &vps->profile_tier_level;
+            max_dec_pic_buffering = vps->vps_max_dec_pic_buffering_minus1[0] + 1;
+
+            if (vps->vps_num_hrd_parameters > 0)
+                hrd = &vps->hrd_parameters[0];
+
+        } else if (unit->type == HEVC_NAL_SPS) {
+            const H265RawSPS *sps = unit->content;
+
+            ptl = &sps->profile_tier_level;
+            max_dec_pic_buffering = sps->sps_max_dec_pic_buffering_minus1[0] + 1;
+
+            width  = sps->pic_width_in_luma_samples;
+            height = sps->pic_height_in_luma_samples;
+
+            if (sps->vui.vui_hrd_parameters_present_flag)
+                hrd = &sps->vui.hrd_parameters;
+
+        } else if (unit->type == HEVC_NAL_PPS) {
+            const H265RawPPS *pps = unit->content;
+
+            if (pps->tiles_enabled_flag) {
+                tile_cols = pps->num_tile_columns_minus1 + 1;
+                tile_rows = pps->num_tile_rows_minus1 + 1;
+            }
+        }
+    }
+
+    if (hrd) {
+        if (hrd->nal_hrd_parameters_present_flag) {
+            bit_rate = (hrd->nal_sub_layer_hrd_parameters[0].bit_rate_value_minus1[0] + 1) *
+                       (INT64_C(1) << hrd->bit_rate_scale + 6);
+        } else if (hrd->vcl_hrd_parameters_present_flag) {
+            bit_rate = (hrd->vcl_sub_layer_hrd_parameters[0].bit_rate_value_minus1[0] + 1) *
+                       (INT64_C(1) << hrd->bit_rate_scale + 6);
+            // Adjust for VCL vs. NAL limits.
+            bit_rate = bit_rate * 11 / 10;
+        }
+    }
+
+    desc = ff_h265_guess_level(ptl, bit_rate, width, height,
+                               0, tile_cols, tile_rows,
+                               max_dec_pic_buffering);
+    if (desc) {
+        av_log(bsf, AV_LOG_DEBUG, "Stream appears to conform to "
+               "level %s.\n", desc->name);
+        ctx->level_guess = desc->level_idc;
+    }
+}
+
+static void h265_metadata_update_level(AVBSFContext *bsf,
+                                       uint8_t *level_idc)
+{
+    H265MetadataContext *ctx = bsf->priv_data;
+
+    if (ctx->level != LEVEL_UNSET) {
+        if (ctx->level == LEVEL_AUTO) {
+            if (ctx->level_guess) {
+                *level_idc = ctx->level_guess;
+            } else {
+                if (!ctx->level_warned) {
+                    av_log(bsf, AV_LOG_WARNING, "Unable to determine level "
+                           "of stream: using level 8.5.\n");
+                    ctx->level_warned = 1;
+                }
+                *level_idc = 255;
+            }
+        } else {
+            *level_idc = ctx->level;
+        }
+    }
+}
+
 static int h265_metadata_update_vps(AVBSFContext *bsf,
                                     H265RawVPS *vps)
 {
@@ -86,6 +188,8 @@ static int h265_metadata_update_vps(AVBSFContext *bsf,
         }
     }
 
+    h265_metadata_update_level(bsf, &vps->profile_tier_level.general_level_idc);
+
     return 0;
 }
 
@@ -227,6 +331,8 @@ static int h265_metadata_update_sps(AVBSFContext *bsf,
     if (need_vui)
         sps->vui_parameters_present_flag = 1;
 
+    h265_metadata_update_level(bsf, &sps->profile_tier_level.general_level_idc);
+
     return 0;
 }
 
@@ -297,6 +403,9 @@ static int h265_metadata_filter(AVBSFContext *bsf, AVPacket *out)
         }
     }
 
+    if (ctx->level == LEVEL_AUTO && !ctx->level_guess)
+        h265_metadata_guess_level(bsf, au);
+
     for (i = 0; i < au->nb_units; i++) {
         if (au->units[i].type == HEVC_NAL_VPS) {
             err = h265_metadata_update_vps(bsf, au->units[i].content);
@@ -348,6 +457,9 @@ static int h265_metadata_init(AVBSFContext *bsf)
             goto fail;
         }
 
+        if (ctx->level == LEVEL_AUTO)
+            h265_metadata_guess_level(bsf, au);
+
         for (i = 0; i < au->nb_units; i++) {
             if (au->units[i].type == HEVC_NAL_VPS) {
                 err = h265_metadata_update_vps(bsf, au->units[i].content);
@@ -441,6 +553,30 @@ static const AVOption h265_metadata_options[] = {
         OFFSET(crop_bottom), AV_OPT_TYPE_INT,
         { .i64 = -1 }, -1, HEVC_MAX_HEIGHT, FLAGS },
 
+    { "level", "Set level (tables A.6 and A.7)",
+        OFFSET(level), AV_OPT_TYPE_INT,
+        { .i64 = LEVEL_UNSET }, LEVEL_UNSET, 0xff, FLAGS, "level" },
+    { "auto", "Attempt to guess level from stream properties",
+        0, AV_OPT_TYPE_CONST,
+        { .i64 = LEVEL_AUTO }, .flags = FLAGS, .unit = "level" },
+#define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, \
+        { .i64 = value },      .flags = FLAGS, .unit = "level"
+    { LEVEL("1",    30) },
+    { LEVEL("2",    60) },
+    { LEVEL("2.1",  63) },
+    { LEVEL("3",    90) },
+    { LEVEL("3.1",  93) },
+    { LEVEL("4",   120) },
+    { LEVEL("4.1", 123) },
+    { LEVEL("5",   150) },
+    { LEVEL("5.1", 153) },
+    { LEVEL("5.2", 156) },
+    { LEVEL("6",   180) },
+    { LEVEL("6.1", 183) },
+    { LEVEL("6.2", 186) },
+    { LEVEL("8.5", 255) },
+#undef LEVEL
+
     { NULL }
 };