/*
 *  gstvaapiprofile.c - VA profile abstraction
 *
 *  gstreamer-vaapi (C) 2010 Splitted-Desktop Systems
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

/**
 * SECTION:gstvaapiprofile
 * @short_description: VA profile abstraction
 */

#include "config.h"
#include <string.h>
#include "gstvaapicompat.h"
#include "gstvaapiprofile.h"

typedef struct _GstVaapiProfileMap              GstVaapiProfileMap;

struct _GstVaapiProfileMap {
    GstVaapiProfile             profile;
    VAProfile                   va_profile;
    const char                 *caps_str;
};

/* Profiles */
static const GstVaapiProfileMap gst_vaapi_profiles[] = {
    { GST_VAAPI_PROFILE_MPEG2_SIMPLE, VAProfileMPEG2Simple,
      "video/mpeg, mpegversion=2, profile=simple"
    },
    { GST_VAAPI_PROFILE_MPEG2_MAIN, VAProfileMPEG2Main,
      "video/mpeg, mpegversion=2, profile=main"
    },
    { GST_VAAPI_PROFILE_MPEG4_SIMPLE, VAProfileMPEG4Simple,
      "video/mpeg, mpegversion=4, profile=simple"
    },
    { GST_VAAPI_PROFILE_MPEG4_ADVANCED_SIMPLE, VAProfileMPEG4AdvancedSimple,
      "video/mpeg, mpegversion=4, profile=advanced-simple"
    },
    { GST_VAAPI_PROFILE_MPEG4_MAIN, VAProfileMPEG4Main,
      "video/mpeg, mpegversion=4, profile=main"
    },
#if VA_CHECK_VERSION(0,30,0)
    { GST_VAAPI_PROFILE_H263_BASELINE, VAProfileH263Baseline,
      "video/x-h263, variant=itu, h263version=h263, profile=baseline"
    },
#endif
    { GST_VAAPI_PROFILE_H264_BASELINE, VAProfileH264Baseline,
      "video/x-h264, variant=itu, profile=baseline"
    },
    { GST_VAAPI_PROFILE_H264_MAIN, VAProfileH264Main,
      "video/x-h264, variant=itu, profile=main"
    },
    { GST_VAAPI_PROFILE_H264_HIGH, VAProfileH264High,
      "video/x-h264, variant=itu, profile=high"
    },
    { GST_VAAPI_PROFILE_VC1_SIMPLE, VAProfileVC1Simple,
      "video/x-vc1, profile=simple"
    },
    { GST_VAAPI_PROFILE_VC1_MAIN, VAProfileVC1Main,
      "video/x-vc1, profile=main"
    },
    { GST_VAAPI_PROFILE_VC1_ADVANCED, VAProfileVC1Advanced,
      "video/x-vc1, profile=advanced"
    },
    { 0, }
};

static const GstVaapiProfileMap *
get_map(GstVaapiProfile profile)
{
    const GstVaapiProfileMap *m;

    for (m = gst_vaapi_profiles; m->profile; m++)
        if (m->profile == profile)
            return m;
    return NULL;
}

/**
 * gst_vaapi_profile:
 * @va_profile: a #VAProfile
 *
 * Converts a VA profile into the corresponding #GstVaapiProfile. If the profile cannot be represented by #GstVaapiProfile, then zero is returned.
 *
 * Return value: the #GstVaapiProfile describing the @va_profile
 */
GstVaapiProfile
gst_vaapi_profile(VAProfile profile)
{
    const GstVaapiProfileMap *m;

    for (m = gst_vaapi_profiles; m->profile; m++)
        if (m->va_profile == profile)
            return m->profile;
    return 0;
}

/**
 * gst_vaapi_profile_from_caps:
 * @caps: a #GstCaps
 *
 * Converts @caps into the corresponding #GstVaapiProfile. If the
 * profile cannot be represented by #GstVaapiProfile, then zero is
 * returned.
 *
 * Return value: the #GstVaapiProfile describing the @caps
 */
GstVaapiProfile
gst_vaapi_profile_from_caps(GstCaps *caps)
{
    const GstVaapiProfileMap *m;
    GstCaps *caps_test;
    GstStructure *structure;
    const gchar *name;
    gsize namelen;
    gboolean found;

    if (!caps)
        return 0;

    structure = gst_caps_get_structure(caps, 0);
    if (!structure)
        return 0;

    name    = gst_structure_get_name(structure);
    namelen = strlen(name);

    found = FALSE;
    for (m = gst_vaapi_profiles; !found && m->profile; m++) {
        if (strncmp(name, m->caps_str, namelen) != 0)
            continue;
        caps_test = gst_caps_from_string(m->caps_str);
        found = gst_caps_is_always_compatible(caps_test, caps);
        gst_caps_unref(caps_test);
    }
    return found ? m->va_profile : 0;
}

/**
 * gst_vaapi_profile_get_va_profile:
 * @profile: a #GstVaapiProfile
 *
 * Converts a #GstVaapiProfile into the corresponding VA profile. If
 * no matching VA profile was found, -1 is returned and this error
 * must be reported to be fixed.
 *
 * Return value: the VA profile, or -1 if none was found
 */
VAProfile
gst_vaapi_profile_get_va_profile(GstVaapiProfile profile)
{
    const GstVaapiProfileMap * const m = get_map(profile);

    return m ? m->va_profile : (VAProfile)-1;
}

/**
 * gst_vaapi_profile_get_caps:
 * @profile: a #GstVaapiProfile
 *
 * Converts a #GstVaapiProfile into the corresponding #GstCaps. If no
 * matching caps were found, %NULL is returned.
 *
 * Return value: the newly allocated #GstCaps, or %NULL if none was found
 */
GstCaps *
gst_vaapi_profile_get_caps(GstVaapiProfile profile)
{
    const GstVaapiProfileMap * const m = get_map(profile);

    return m ? gst_caps_from_string(m->caps_str) : NULL;
}

/**
 * gst_vaapi_profile_get_codec:
 * @profile: a #GstVaapiProfile
 *
 * Extracts the #GstVaapiCodec from @profile.
 *
 * Return value: the #GstVaapiCodec from @profile
 */
GstVaapiCodec
gst_vaapi_profile_get_codec(GstVaapiProfile profile)
{
    return (GstVaapiCodec)(((guint32)profile) & 0xffffff00);
}