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utils: h264: add helpers for profile and level string mappings.
Add profile and level helper functions to convert to/from strings.
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2 changed files with 158 additions and 0 deletions
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@ -24,6 +24,55 @@
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#include <gst/codecparsers/gsth264parser.h>
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#include "gstvaapiutils_h264_priv.h"
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struct map
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{
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guint value;
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const gchar *name;
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};
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/* Profile string map */
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static const struct map gst_vaapi_h264_profile_map[] = {
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/* *INDENT-OFF* */
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{ GST_VAAPI_PROFILE_H264_CONSTRAINED_BASELINE, "constrained-baseline" },
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{ GST_VAAPI_PROFILE_H264_BASELINE, "baseline" },
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{ GST_VAAPI_PROFILE_H264_MAIN, "main" },
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{ GST_VAAPI_PROFILE_H264_EXTENDED, "extended" },
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{ GST_VAAPI_PROFILE_H264_HIGH, "high" },
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{ GST_VAAPI_PROFILE_H264_HIGH10, "high-10" },
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{ GST_VAAPI_PROFILE_H264_HIGH_422, "high-4:2:2" },
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{ GST_VAAPI_PROFILE_H264_HIGH_444, "high-4:4:4" },
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{ GST_VAAPI_PROFILE_H264_SCALABLE_BASELINE, "scalable-baseline" },
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{ GST_VAAPI_PROFILE_H264_SCALABLE_HIGH, "scalable-high" },
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{ GST_VAAPI_PROFILE_H264_STEREO_HIGH, "stereo-high" },
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{ GST_VAAPI_PROFILE_H264_MULTIVIEW_HIGH, "multiview-high" },
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{ 0, NULL }
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/* *INDENT-ON* */
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};
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/* Level string map */
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static const struct map gst_vaapi_h264_level_map[] = {
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/* *INDENT-OFF* */
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{ GST_VAAPI_LEVEL_H264_L1, "1" },
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{ GST_VAAPI_LEVEL_H264_L1b, "1b" },
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{ GST_VAAPI_LEVEL_H264_L1_1, "1.1" },
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{ GST_VAAPI_LEVEL_H264_L1_2, "1.2" },
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{ GST_VAAPI_LEVEL_H264_L1_3, "1.3" },
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{ GST_VAAPI_LEVEL_H264_L2, "2" },
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{ GST_VAAPI_LEVEL_H264_L2_1, "2.1" },
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{ GST_VAAPI_LEVEL_H264_L2_2, "2.2" },
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{ GST_VAAPI_LEVEL_H264_L3, "3" },
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{ GST_VAAPI_LEVEL_H264_L3_1, "3.1" },
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{ GST_VAAPI_LEVEL_H264_L3_2, "3.2" },
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{ GST_VAAPI_LEVEL_H264_L4, "4" },
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{ GST_VAAPI_LEVEL_H264_L4_1, "4.1" },
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{ GST_VAAPI_LEVEL_H264_L4_2, "4.2" },
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{ GST_VAAPI_LEVEL_H264_L5, "5" },
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{ GST_VAAPI_LEVEL_H264_L5_1, "5.1" },
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{ GST_VAAPI_LEVEL_H264_L5_2, "5.2" },
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{ 0, NULL }
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/* *INDENT-ON* */
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};
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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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@ -49,6 +98,35 @@ static const GstVaapiH264LevelLimits gst_vaapi_h264_level_limits[] = {
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};
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/* *INDENT-ON* */
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/* Lookup value in map */
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static const struct map *
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map_lookup_value (const struct map *m, guint value)
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{
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g_return_val_if_fail (m != NULL, NULL);
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for (; m->name != NULL; m++) {
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if (m->value == value)
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return m;
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}
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return NULL;
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}
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/* Lookup name in map */
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static const struct map *
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map_lookup_name (const struct map *m, const gchar * name)
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{
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g_return_val_if_fail (m != NULL, NULL);
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if (!name)
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return NULL;
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for (; m->name != NULL; m++) {
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if (strcmp (m->name, name) == 0)
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return m;
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}
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return NULL;
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}
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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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@ -146,6 +224,25 @@ 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 GstVaapiProfile from a string representation */
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GstVaapiProfile
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gst_vaapi_utils_h264_get_profile_from_string (const gchar * str)
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{
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const struct map *const m = map_lookup_name (gst_vaapi_h264_profile_map, str);
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return m ? (GstVaapiProfile) m->value : GST_VAAPI_PROFILE_UNKNOWN;
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}
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/** Returns a string representation for the supplied H.264 profile */
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const gchar *
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gst_vaapi_utils_h264_get_profile_string (GstVaapiProfile profile)
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{
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const struct map *const m =
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map_lookup_value (gst_vaapi_h264_profile_map, profile);
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return m ? m->name : NULL;
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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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@ -174,6 +271,51 @@ gst_vaapi_utils_h264_get_level_idc (GstVaapiLevelH264 level)
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return llp ? llp->level_idc : 0;
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}
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/** Returns GstVaapiLevelH264 from a string representation */
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GstVaapiLevelH264
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gst_vaapi_utils_h264_get_level_from_string (const gchar * str)
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{
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gint v, level_idc = 0;
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if (!str || !str[0])
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goto not_found;
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v = g_ascii_digit_value (str[0]);
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if (v < 0)
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goto not_found;
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level_idc = v * 10;
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switch (str[1]) {
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case '\0':
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break;
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case '.':
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v = g_ascii_digit_value (str[2]);
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if (v < 0 || str[3] != '\0')
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goto not_found;
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level_idc += v;
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break;
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case 'b':
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if (level_idc == 10 && str[2] == '\0')
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return GST_VAAPI_LEVEL_H264_L1b;
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// fall-trough
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default:
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goto not_found;
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}
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return gst_vaapi_utils_h264_get_level (level_idc);
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not_found:
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return (GstVaapiLevelH264) 0;
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}
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/** Returns a string representation for the supplied H.264 level */
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const gchar *
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gst_vaapi_utils_h264_get_level_string (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_map[level - GST_VAAPI_LEVEL_H264_L1].name;
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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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@ -71,6 +71,22 @@ typedef enum
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GST_VAAPI_LEVEL_H264_L5_2,
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} GstVaapiLevelH264;
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/* Returns GstVaapiProfile from a string representation */
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GstVaapiProfile
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gst_vaapi_utils_h264_get_profile_from_string (const gchar * str);
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/* Returns a string representation for the supplied H.264 profile */
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const gchar *
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gst_vaapi_utils_h264_get_profile_string (GstVaapiProfile profile);
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/* Returns GstVaapiLevelH264 from a string representation */
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GstVaapiLevelH264
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gst_vaapi_utils_h264_get_level_from_string (const gchar * str);
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/* Returns a string representation for the supplied H.264 level */
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const gchar *
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gst_vaapi_utils_h264_get_level_string (GstVaapiLevelH264 level);
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G_END_DECLS
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#endif /* GST_VAAPI_UTILS_H264_H */
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