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utils: add helpers for H.264 levels.
- gst_vaapi_utils_h264_get_level(): Returns GstVaapiLevelH264 from H.264 level_idc value - gst_vaapi_utils_h264_get_level_idc(): Returns H.264 level_idc value from GstVaapiLevelH264 - gst_vaapi_utils_h264_get_level_limits(): Returns level limits as specified in Table A-1 of the H.264 standard - gst_vaapi_utils_h264_get_level_limits_table(): Returns the Table A-1 specification
This commit is contained in:
Gwenole Beauchesne
parent
7f1f879e28
commit
e2f137f149
3 changed files with 165 additions and 22 deletions
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@ -417,34 +417,23 @@ exec_ref_pic_marking(GstVaapiDecoderH264 *decoder, GstVaapiPictureH264 *picture)
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static guint
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get_max_dec_frame_buffering(GstH264SPS *sps)
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{
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guint max_dec_frame_buffering, MaxDpbMbs, PicSizeMbs;
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guint max_dec_frame_buffering, PicSizeMbs;
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GstVaapiLevelH264 level;
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const GstVaapiH264LevelLimits *level_limits;
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/* Table A-1 - Level limits */
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switch (sps->level_idc) {
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case 10: MaxDpbMbs = 396; break;
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case 11: MaxDpbMbs = 900; break;
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case 12: MaxDpbMbs = 2376; break;
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case 13: MaxDpbMbs = 2376; break;
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case 20: MaxDpbMbs = 2376; break;
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case 21: MaxDpbMbs = 4752; break;
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case 22: MaxDpbMbs = 8100; break;
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case 30: MaxDpbMbs = 8100; break;
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case 31: MaxDpbMbs = 18000; break;
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case 32: MaxDpbMbs = 20480; break;
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case 40: MaxDpbMbs = 32768; break;
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case 41: MaxDpbMbs = 32768; break;
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case 42: MaxDpbMbs = 34816; break;
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case 50: MaxDpbMbs = 110400; break;
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case 51: MaxDpbMbs = 184320; break;
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default:
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g_assert(0 && "unhandled level");
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break;
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}
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if (G_UNLIKELY(sps->level_idc == 11 && sps->constraint_set3_flag))
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level = GST_VAAPI_LEVEL_H264_L1b;
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else
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level = gst_vaapi_utils_h264_get_level(sps->level_idc);
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level_limits = gst_vaapi_utils_h264_get_level_limits(level);
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if (!level_limits)
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return 16;
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PicSizeMbs = ((sps->pic_width_in_mbs_minus1 + 1) *
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(sps->pic_height_in_map_units_minus1 + 1) *
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(sps->frame_mbs_only_flag ? 1 : 2));
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max_dec_frame_buffering = MaxDpbMbs / PicSizeMbs;
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max_dec_frame_buffering = level_limits->MaxDpbMbs / PicSizeMbs;
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/* VUI parameters */
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if (sps->vui_parameters_present_flag) {
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@ -24,6 +24,31 @@
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#include <gst/codecparsers/gsth264parser.h>
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#include "gstvaapiutils_h264.h"
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/* Table A-1 - Level limits */
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/* *INDENT-OFF* */
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static const GstVaapiH264LevelLimits gst_vaapi_h264_level_limits[] = {
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/* level idc MaxMBPS MaxFS MaxDpbMbs MaxBR */
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{ GST_VAAPI_LEVEL_H264_L1, 10, 1485, 99, 396, 64 },
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{ GST_VAAPI_LEVEL_H264_L1b, 11, 1485, 99, 396, 128 },
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{ GST_VAAPI_LEVEL_H264_L1_1, 11, 3000, 396, 900, 192 },
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{ GST_VAAPI_LEVEL_H264_L1_2, 12, 6000, 396, 2376, 384 },
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{ GST_VAAPI_LEVEL_H264_L1_3, 13, 11880, 396, 2376, 768 },
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{ GST_VAAPI_LEVEL_H264_L2, 20, 11880, 396, 2376, 2000 },
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{ GST_VAAPI_LEVEL_H264_L2_1, 21, 19800, 792, 4752, 4000 },
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{ GST_VAAPI_LEVEL_H264_L2_2, 22, 20250, 1620, 8100, 4000 },
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{ GST_VAAPI_LEVEL_H264_L3, 30, 40500, 1620, 8100, 10000 },
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{ GST_VAAPI_LEVEL_H264_L3_1, 31, 108000, 3600, 18000, 14000 },
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{ GST_VAAPI_LEVEL_H264_L3_2, 32, 216000, 5120, 20480, 20000 },
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{ GST_VAAPI_LEVEL_H264_L4, 40, 245760, 8192, 32768, 20000 },
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{ GST_VAAPI_LEVEL_H264_L4_1, 41, 245760, 8192, 32768, 50000 },
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{ GST_VAAPI_LEVEL_H264_L4_2, 42, 522240, 8704, 34816, 50000 },
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{ GST_VAAPI_LEVEL_H264_L5, 50, 589824, 22080, 110400, 135000 },
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{ GST_VAAPI_LEVEL_H264_L5_1, 51, 983040, 36864, 184320, 240000 },
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{ GST_VAAPI_LEVEL_H264_L5_2, 52, 2073600, 36864, 184320, 240000 },
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{ 0, }
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};
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/* *INDENT-ON* */
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/** Returns GstVaapiProfile from H.264 profile_idc value */
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GstVaapiProfile
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gst_vaapi_utils_h264_get_profile (guint8 profile_idc)
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@ -79,6 +104,52 @@ gst_vaapi_utils_h264_get_profile_idc (GstVaapiProfile profile)
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return profile_idc;
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}
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/** Returns GstVaapiLevelH264 from H.264 level_idc value */
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GstVaapiLevelH264
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gst_vaapi_utils_h264_get_level (guint8 level_idc)
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{
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const GstVaapiH264LevelLimits *llp;
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// Prefer Level 1.1 over level 1b
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if (G_UNLIKELY (level_idc == 11))
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return GST_VAAPI_LEVEL_H264_L1_1;
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for (llp = gst_vaapi_h264_level_limits; llp->level != 0; llp++) {
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if (llp->level_idc == level_idc)
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return llp->level;
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}
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g_assert (0 && "unsupported level_idc value");
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return (GstVaapiLevelH264) 0;
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}
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/** Returns H.264 level_idc value from GstVaapiLevelH264 */
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guint8
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gst_vaapi_utils_h264_get_level_idc (GstVaapiLevelH264 level)
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{
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const GstVaapiH264LevelLimits *const llp =
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gst_vaapi_utils_h264_get_level_limits (level);
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return llp ? llp->level_idc : 0;
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}
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/** Returns level limits as specified in Table A-1 of the H.264 standard */
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const GstVaapiH264LevelLimits *
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gst_vaapi_utils_h264_get_level_limits (GstVaapiLevelH264 level)
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{
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if (level < GST_VAAPI_LEVEL_H264_L1 || level > GST_VAAPI_LEVEL_H264_L5_2)
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return NULL;
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return &gst_vaapi_h264_level_limits[level - GST_VAAPI_LEVEL_H264_L1];
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}
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/** Returns the Table A-1 specification */
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const GstVaapiH264LevelLimits *
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gst_vaapi_utils_h264_get_level_limits_table (guint * out_length_ptr)
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{
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if (out_length_ptr)
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*out_length_ptr = G_N_ELEMENTS (gst_vaapi_h264_level_limits) - 1;
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return gst_vaapi_h264_level_limits;
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}
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/** Returns GstVaapiChromaType from H.264 chroma_format_idc value */
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GstVaapiChromaType
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gst_vaapi_utils_h264_get_chroma_type (guint chroma_format_idc)
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@ -29,6 +29,69 @@
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G_BEGIN_DECLS
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/**
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* GstVaapiLevelH264:
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* @GST_VAAPI_LEVEL_H264_L1: H.264 level 1.
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* @GST_VAAPI_LEVEL_H264_L1_1: H.264 level 1.1.
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* @GST_VAAPI_LEVEL_H264_L1_2: H.264 level 1.2.
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* @GST_VAAPI_LEVEL_H264_L1_3: H.264 level 1.3.
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* @GST_VAAPI_LEVEL_H264_L2: H.264 level 2.
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* @GST_VAAPI_LEVEL_H264_L2_1: H.264 level 2.1.
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* @GST_VAAPI_LEVEL_H264_L2_2: H.264 level 2.2.
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* @GST_VAAPI_LEVEL_H264_L3: H.264 level 3.
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* @GST_VAAPI_LEVEL_H264_L3_1: H.264 level 3.1.
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* @GST_VAAPI_LEVEL_H264_L3_2: H.264 level 3.2.
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* @GST_VAAPI_LEVEL_H264_L4: H.264 level 4.
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* @GST_VAAPI_LEVEL_H264_L4_1: H.264 level 4.1.
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* @GST_VAAPI_LEVEL_H264_L4_2: H.264 level 4.2.
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* @GST_VAAPI_LEVEL_H264_L5: H.264 level 5.
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* @GST_VAAPI_LEVEL_H264_L5_1: H.264 level 5.1.
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* @GST_VAAPI_LEVEL_H264_L5_2: H.264 level 5.2.
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*
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* The set of all levels for #GstVaapiLevelH264.
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*/
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typedef enum
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{
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GST_VAAPI_LEVEL_H264_L1 = 1,
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GST_VAAPI_LEVEL_H264_L1b,
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GST_VAAPI_LEVEL_H264_L1_1,
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GST_VAAPI_LEVEL_H264_L1_2,
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GST_VAAPI_LEVEL_H264_L1_3,
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GST_VAAPI_LEVEL_H264_L2,
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GST_VAAPI_LEVEL_H264_L2_1,
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GST_VAAPI_LEVEL_H264_L2_2,
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GST_VAAPI_LEVEL_H264_L3,
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GST_VAAPI_LEVEL_H264_L3_1,
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GST_VAAPI_LEVEL_H264_L3_2,
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GST_VAAPI_LEVEL_H264_L4,
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GST_VAAPI_LEVEL_H264_L4_1,
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GST_VAAPI_LEVEL_H264_L4_2,
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GST_VAAPI_LEVEL_H264_L5,
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GST_VAAPI_LEVEL_H264_L5_1,
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GST_VAAPI_LEVEL_H264_L5_2,
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} GstVaapiLevelH264;
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/**
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* GstVaapiH264LevelLimits:
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* @level: the #GstVaapiLevelH264
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* @level_idc: the H.264 level_idc value
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* @MaxMBPS: the maximum macroblock processing rate (MB/sec)
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* @MaxFS: the maximum frame size (MBs)
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* @MaxDpbMbs: the maxium decoded picture buffer size (MBs)
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* @MaxBR: the maximum video bit rate (kbps)
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*
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* The data structure that describes the limits of an H.264 level.
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*/
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typedef struct
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{
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GstVaapiLevelH264 level;
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guint8 level_idc;
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guint32 MaxMBPS;
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guint32 MaxFS;
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guint32 MaxDpbMbs;
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guint32 MaxBR;
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} GstVaapiH264LevelLimits;
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/* Returns GstVaapiProfile from H.264 profile_idc value */
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G_GNUC_INTERNAL
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GstVaapiProfile
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@ -39,6 +102,26 @@ G_GNUC_INTERNAL
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guint8
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gst_vaapi_utils_h264_get_profile_idc (GstVaapiProfile profile);
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/* Returns GstVaapiLevelH264 from H.264 level_idc value */
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G_GNUC_INTERNAL
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GstVaapiLevelH264
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gst_vaapi_utils_h264_get_level (guint8 level_idc);
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/* Returns H.264 level_idc value from GstVaapiLevelH264 */
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G_GNUC_INTERNAL
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guint8
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gst_vaapi_utils_h264_get_level_idc (GstVaapiLevelH264 level);
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/* Returns level limits as specified in Table A-1 of the H.264 standard */
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G_GNUC_INTERNAL
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const GstVaapiH264LevelLimits *
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gst_vaapi_utils_h264_get_level_limits (GstVaapiLevelH264 level);
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/* Returns the Table A-1 specification */
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G_GNUC_INTERNAL
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const GstVaapiH264LevelLimits *
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gst_vaapi_utils_h264_get_level_limits_table (guint *out_length_ptr);
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/* Returns GstVaapiChromaType from H.264 chroma_format_idc value */
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G_GNUC_INTERNAL
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GstVaapiChromaType
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