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284 lines
8.2 KiB
C
284 lines
8.2 KiB
C
/*
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* gstvaapiutils_mpeg2.c - MPEG-2 related utilities
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*
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* Copyright (C) 2011-2014 Intel Corporation
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* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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#include "sysdeps.h"
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#include <gst/codecparsers/gstmpegvideoparser.h>
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#include "gstvaapiutils_mpeg2_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_mpeg2_profile_map[] = {
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/* *INDENT-OFF* */
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{ GST_VAAPI_PROFILE_MPEG2_SIMPLE, "simple" },
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{ GST_VAAPI_PROFILE_MPEG2_MAIN, "main" },
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{ GST_VAAPI_PROFILE_MPEG2_HIGH, "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_mpeg2_level_map[] = {
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/* *INDENT-OFF* */
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{ GST_VAAPI_LEVEL_MPEG2_LOW, "low" },
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{ GST_VAAPI_LEVEL_MPEG2_MAIN, "main" },
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{ GST_VAAPI_LEVEL_MPEG2_HIGH_1440, "high-1440" },
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{ GST_VAAPI_LEVEL_MPEG2_HIGH, "high" },
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{ 0, NULL }
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/* *INDENT-ON* */
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};
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/* Table 8-10 to 8-13 (up to Main profile only) */
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/* *INDENT-OFF* */
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static const GstVaapiMPEG2LevelLimits gst_vaapi_mpeg2_level_limits[] = {
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/* level h_size v_size fps samples kbps vbv_size */
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{ GST_VAAPI_LEVEL_MPEG2_LOW,
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0x0a, 352, 288, 30, 3041280, 4000, 475136 },
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{ GST_VAAPI_LEVEL_MPEG2_MAIN,
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0x08, 720, 576, 30, 1036800, 15000, 1835008 },
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{ GST_VAAPI_LEVEL_MPEG2_HIGH_1440,
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0x06, 1440, 1152, 60, 47001600, 60000, 7340032 },
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{ GST_VAAPI_LEVEL_MPEG2_HIGH,
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0x04, 1920, 1152, 60, 62668800, 80000, 9781248 },
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{ 0, }
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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 a relative score for the supplied GstVaapiProfile */
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guint
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gst_vaapi_utils_mpeg2_get_profile_score (GstVaapiProfile profile)
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{
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const struct map *const m =
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map_lookup_value (gst_vaapi_mpeg2_profile_map, profile);
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return m ? 1 + (m - gst_vaapi_mpeg2_profile_map) : 0;
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}
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/** Returns GstVaapiProfile from MPEG-2 profile_idc value */
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GstVaapiProfile
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gst_vaapi_utils_mpeg2_get_profile (guint8 profile_idc)
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{
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GstVaapiProfile profile;
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switch (profile_idc) {
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case GST_MPEG_VIDEO_PROFILE_SIMPLE:
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profile = GST_VAAPI_PROFILE_MPEG2_SIMPLE;
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break;
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case GST_MPEG_VIDEO_PROFILE_MAIN:
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profile = GST_VAAPI_PROFILE_MPEG2_MAIN;
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break;
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case GST_MPEG_VIDEO_PROFILE_HIGH:
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profile = GST_VAAPI_PROFILE_MPEG2_HIGH;
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break;
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default:
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g_debug ("unsupported profile_idc value");
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profile = GST_VAAPI_PROFILE_UNKNOWN;
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break;
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}
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return profile;
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}
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/** Returns MPEG-2 profile_idc value from GstVaapiProfile */
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guint8
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gst_vaapi_utils_mpeg2_get_profile_idc (GstVaapiProfile profile)
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{
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guint8 profile_idc;
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switch (profile) {
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case GST_VAAPI_PROFILE_MPEG2_SIMPLE:
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profile_idc = GST_MPEG_VIDEO_PROFILE_SIMPLE;
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break;
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case GST_VAAPI_PROFILE_MPEG2_MAIN:
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profile_idc = GST_MPEG_VIDEO_PROFILE_MAIN;
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break;
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case GST_VAAPI_PROFILE_MPEG2_HIGH:
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profile_idc = GST_MPEG_VIDEO_PROFILE_HIGH;
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break;
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default:
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g_debug ("unsupported GstVaapiProfile value");
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profile_idc = 0;
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break;
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}
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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_mpeg2_get_profile_from_string (const gchar * str)
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{
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const struct map *const m =
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map_lookup_name (gst_vaapi_mpeg2_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 MPEG-2 profile */
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const gchar *
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gst_vaapi_utils_mpeg2_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_mpeg2_profile_map, profile);
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return m ? m->name : NULL;
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}
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/** Returns GstVaapiLevelMPEG2 from MPEG-2 level_idc value */
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GstVaapiLevelMPEG2
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gst_vaapi_utils_mpeg2_get_level (guint8 level_idc)
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{
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const GstVaapiMPEG2LevelLimits *llp;
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for (llp = gst_vaapi_mpeg2_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_debug ("unsupported level_idc value");
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return (GstVaapiLevelMPEG2) 0;
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}
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/** Returns MPEG-2 level_idc value from GstVaapiLevelMPEG2 */
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guint8
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gst_vaapi_utils_mpeg2_get_level_idc (GstVaapiLevelMPEG2 level)
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{
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const GstVaapiMPEG2LevelLimits *const llp =
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gst_vaapi_utils_mpeg2_get_level_limits (level);
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return llp ? llp->level_idc : 0;
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}
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/** Returns GstVaapiLevelMPEG2 from a string representation */
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GstVaapiLevelMPEG2
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gst_vaapi_utils_mpeg2_get_level_from_string (const gchar * str)
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{
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const struct map *const m = map_lookup_name (gst_vaapi_mpeg2_level_map, str);
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return (GstVaapiLevelMPEG2) (m ? m->value : 0);
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}
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/** Returns a string representation for the supplied MPEG-2 level */
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const gchar *
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gst_vaapi_utils_mpeg2_get_level_string (GstVaapiLevelMPEG2 level)
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{
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if (level < GST_VAAPI_LEVEL_MPEG2_LOW || level > GST_VAAPI_LEVEL_MPEG2_HIGH)
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return NULL;
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return gst_vaapi_mpeg2_level_map[level - GST_VAAPI_LEVEL_MPEG2_LOW].name;
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}
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/** Returns level limits as specified in Tables 8-10 to 8-13 of the
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MPEG-2 standard */
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const GstVaapiMPEG2LevelLimits *
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gst_vaapi_utils_mpeg2_get_level_limits (GstVaapiLevelMPEG2 level)
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{
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if (level < GST_VAAPI_LEVEL_MPEG2_LOW || level > GST_VAAPI_LEVEL_MPEG2_HIGH)
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return NULL;
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return &gst_vaapi_mpeg2_level_limits[level - GST_VAAPI_LEVEL_MPEG2_LOW];
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}
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/** Returns Tables 8-10 to 8-13 from the specification (up to High profile) */
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const GstVaapiMPEG2LevelLimits *
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gst_vaapi_utils_mpeg2_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_mpeg2_level_limits) - 1;
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return gst_vaapi_mpeg2_level_limits;
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}
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/** Returns GstVaapiChromaType from MPEG-2 chroma_format_idc value */
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GstVaapiChromaType
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gst_vaapi_utils_mpeg2_get_chroma_type (guint chroma_format_idc)
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{
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GstVaapiChromaType chroma_type;
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switch (chroma_format_idc) {
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case GST_MPEG_VIDEO_CHROMA_420:
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chroma_type = GST_VAAPI_CHROMA_TYPE_YUV420;
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break;
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case GST_MPEG_VIDEO_CHROMA_422:
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chroma_type = GST_VAAPI_CHROMA_TYPE_YUV422;
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break;
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case GST_MPEG_VIDEO_CHROMA_444:
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chroma_type = GST_VAAPI_CHROMA_TYPE_YUV444;
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break;
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default:
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g_debug ("unsupported chroma_format_idc value");
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chroma_type = (GstVaapiChromaType) 0;
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break;
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}
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return chroma_type;
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}
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/** Returns MPEG-2 chroma_format_idc value from GstVaapiChromaType */
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guint
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gst_vaapi_utils_mpeg2_get_chroma_format_idc (GstVaapiChromaType chroma_type)
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{
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guint chroma_format_idc;
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switch (chroma_type) {
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case GST_VAAPI_CHROMA_TYPE_YUV420:
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chroma_format_idc = GST_MPEG_VIDEO_CHROMA_420;
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break;
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case GST_VAAPI_CHROMA_TYPE_YUV422:
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chroma_format_idc = GST_MPEG_VIDEO_CHROMA_422;
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break;
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case GST_VAAPI_CHROMA_TYPE_YUV444:
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chroma_format_idc = GST_MPEG_VIDEO_CHROMA_444;
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break;
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default:
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g_debug ("unsupported GstVaapiChromaType value");
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chroma_format_idc = 1;
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break;
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}
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return chroma_format_idc;
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}
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