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utils: h264: add helpers for profile and level string mappings.

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Add profile and level helper functions to convert to/from strings.
This commit is contained in:
Gwenole Beauchesne 2014-01-10 19:37:44 +01:00
parent 589078f2a4
commit b0c2ac4159
2 changed files with 158 additions and 0 deletions
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142
gst-libs/gst/vaapi/gstvaapiutils_h264.c
View file

@ -24,6 +24,55 @@
#include <gst/codecparsers/gsth264parser.h>
#include "gstvaapiutils_h264_priv.h"
struct map
{
guint value;
const gchar *name;
};
/* Profile string map */
static const struct map gst_vaapi_h264_profile_map[] = {
/* *INDENT-OFF* */
{ GST_VAAPI_PROFILE_H264_CONSTRAINED_BASELINE, "constrained-baseline" },
{ GST_VAAPI_PROFILE_H264_BASELINE, "baseline" },
{ GST_VAAPI_PROFILE_H264_MAIN, "main" },
{ GST_VAAPI_PROFILE_H264_EXTENDED, "extended" },
{ GST_VAAPI_PROFILE_H264_HIGH, "high" },
{ GST_VAAPI_PROFILE_H264_HIGH10, "high-10" },
{ GST_VAAPI_PROFILE_H264_HIGH_422, "high-4:2:2" },
{ GST_VAAPI_PROFILE_H264_HIGH_444, "high-4:4:4" },
{ GST_VAAPI_PROFILE_H264_SCALABLE_BASELINE, "scalable-baseline" },
{ GST_VAAPI_PROFILE_H264_SCALABLE_HIGH, "scalable-high" },
{ GST_VAAPI_PROFILE_H264_STEREO_HIGH, "stereo-high" },
{ GST_VAAPI_PROFILE_H264_MULTIVIEW_HIGH, "multiview-high" },
{ 0, NULL }
/* *INDENT-ON* */
};
/* Level string map */
static const struct map gst_vaapi_h264_level_map[] = {
/* *INDENT-OFF* */
{ GST_VAAPI_LEVEL_H264_L1, "1" },
{ GST_VAAPI_LEVEL_H264_L1b, "1b" },
{ GST_VAAPI_LEVEL_H264_L1_1, "1.1" },
{ GST_VAAPI_LEVEL_H264_L1_2, "1.2" },
{ GST_VAAPI_LEVEL_H264_L1_3, "1.3" },
{ GST_VAAPI_LEVEL_H264_L2, "2" },
{ GST_VAAPI_LEVEL_H264_L2_1, "2.1" },
{ GST_VAAPI_LEVEL_H264_L2_2, "2.2" },
{ GST_VAAPI_LEVEL_H264_L3, "3" },
{ GST_VAAPI_LEVEL_H264_L3_1, "3.1" },
{ GST_VAAPI_LEVEL_H264_L3_2, "3.2" },
{ GST_VAAPI_LEVEL_H264_L4, "4" },
{ GST_VAAPI_LEVEL_H264_L4_1, "4.1" },
{ GST_VAAPI_LEVEL_H264_L4_2, "4.2" },
{ GST_VAAPI_LEVEL_H264_L5, "5" },
{ GST_VAAPI_LEVEL_H264_L5_1, "5.1" },
{ GST_VAAPI_LEVEL_H264_L5_2, "5.2" },
{ 0, NULL }
/* *INDENT-ON* */
};
/* Table A-1 - Level limits */
/* *INDENT-OFF* */
static const GstVaapiH264LevelLimits gst_vaapi_h264_level_limits[] = {
@ -49,6 +98,35 @@ static const GstVaapiH264LevelLimits gst_vaapi_h264_level_limits[] = {
};
/* *INDENT-ON* */
/* Lookup value in map */
static const struct map *
map_lookup_value (const struct map *m, guint value)
{
g_return_val_if_fail (m != NULL, NULL);
for (; m->name != NULL; m++) {
if (m->value == value)
return m;
}
return NULL;
}
/* Lookup name in map */
static const struct map *
map_lookup_name (const struct map *m, const gchar * name)
{
g_return_val_if_fail (m != NULL, NULL);
if (!name)
return NULL;
for (; m->name != NULL; m++) {
if (strcmp (m->name, name) == 0)
return m;
}
return NULL;
}
/** Returns GstVaapiProfile from H.264 profile_idc value */
GstVaapiProfile
gst_vaapi_utils_h264_get_profile (guint8 profile_idc)
@ -146,6 +224,25 @@ gst_vaapi_utils_h264_get_profile_idc (GstVaapiProfile profile)
return profile_idc;
}
/** Returns GstVaapiProfile from a string representation */
GstVaapiProfile
gst_vaapi_utils_h264_get_profile_from_string (const gchar * str)
{
const struct map *const m = map_lookup_name (gst_vaapi_h264_profile_map, str);
return m ? (GstVaapiProfile) m->value : GST_VAAPI_PROFILE_UNKNOWN;
}
/** Returns a string representation for the supplied H.264 profile */
const gchar *
gst_vaapi_utils_h264_get_profile_string (GstVaapiProfile profile)
{
const struct map *const m =
map_lookup_value (gst_vaapi_h264_profile_map, profile);
return m ? m->name : NULL;
}
/** Returns GstVaapiLevelH264 from H.264 level_idc value */
GstVaapiLevelH264
gst_vaapi_utils_h264_get_level (guint8 level_idc)
@ -174,6 +271,51 @@ gst_vaapi_utils_h264_get_level_idc (GstVaapiLevelH264 level)
return llp ? llp->level_idc : 0;
}
/** Returns GstVaapiLevelH264 from a string representation */
GstVaapiLevelH264
gst_vaapi_utils_h264_get_level_from_string (const gchar * str)
{
gint v, level_idc = 0;
if (!str || !str[0])
goto not_found;
v = g_ascii_digit_value (str[0]);
if (v < 0)
goto not_found;
level_idc = v * 10;
switch (str[1]) {
case '\0':
break;
case '.':
v = g_ascii_digit_value (str[2]);
if (v < 0 || str[3] != '\0')
goto not_found;
level_idc += v;
break;
case 'b':
if (level_idc == 10 && str[2] == '\0')
return GST_VAAPI_LEVEL_H264_L1b;
// fall-trough
default:
goto not_found;
}
return gst_vaapi_utils_h264_get_level (level_idc);
not_found:
return (GstVaapiLevelH264) 0;
}
/** Returns a string representation for the supplied H.264 level */
const gchar *
gst_vaapi_utils_h264_get_level_string (GstVaapiLevelH264 level)
{
if (level < GST_VAAPI_LEVEL_H264_L1 || level > GST_VAAPI_LEVEL_H264_L5_2)
return NULL;
return gst_vaapi_h264_level_map[level - GST_VAAPI_LEVEL_H264_L1].name;
}
/** Returns level limits as specified in Table A-1 of the H.264 standard */
const GstVaapiH264LevelLimits *
gst_vaapi_utils_h264_get_level_limits (GstVaapiLevelH264 level)

16
gst-libs/gst/vaapi/gstvaapiutils_h264.h
View file

@ -71,6 +71,22 @@ typedef enum
GST_VAAPI_LEVEL_H264_L5_2,
} GstVaapiLevelH264;
/* Returns GstVaapiProfile from a string representation */
GstVaapiProfile
gst_vaapi_utils_h264_get_profile_from_string (const gchar * str);
/* Returns a string representation for the supplied H.264 profile */
const gchar *
gst_vaapi_utils_h264_get_profile_string (GstVaapiProfile profile);
/* Returns GstVaapiLevelH264 from a string representation */
GstVaapiLevelH264
gst_vaapi_utils_h264_get_level_from_string (const gchar * str);
/* Returns a string representation for the supplied H.264 level */
const gchar *
gst_vaapi_utils_h264_get_level_string (GstVaapiLevelH264 level);
G_END_DECLS
#endif /* GST_VAAPI_UTILS_H264_H */