/* * Codec descriptors public API * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVCODEC_CODEC_DESC_H#define AVCODEC_CODEC_DESC_H #include "libavutil/avutil.h" #include "codec_id.h" /** * @addtogroup lavc_core * @{ */ /** * This struct describes the properties of a single codec described by an * AVCodecID. * @see avcodec_descriptor_get() */typedef struct AVCodecDescriptor {    enum AVCodecID     id;    enum AVMediaType type;    /**     * Name of the codec described by this descriptor. It is non-empty and     * unique for each codec descriptor. It should contain alphanumeric     * characters and '_' only.     */    const char      *name;    /**     * A more descriptive name for this codec. May be NULL.     */    const char *long_name;    /**     * Codec properties, a combination of AV_CODEC_PROP_* flags.     */    int             props;    /**     * MIME type(s) associated with the codec.     * May be NULL; if not, a NULL-terminated array of MIME types.     * The first item is always non-NULL and is the preferred MIME type.     */    const char *const *mime_types;    /**     * If non-NULL, an array of profiles recognized for this codec.     * Terminated with AV_PROFILE_UNKNOWN.     */    const struct AVProfile *profiles;} AVCodecDescriptor; /** * Codec uses only intra compression. * Video and audio codecs only. */#define AV_CODEC_PROP_INTRA_ONLY    (1 << 0)/** * Codec supports lossy compression. Audio and video codecs only. * @note a codec may support both lossy and lossless * compression modes */#define AV_CODEC_PROP_LOSSY         (1 << 1)/** * Codec supports lossless compression. Audio and video codecs only. */#define AV_CODEC_PROP_LOSSLESS      (1 << 2)/** * Codec supports frame reordering. That is, the coded order (the order in which * the encoded packets are output by the encoders / stored / input to the * decoders) may be different from the presentation order of the corresponding * frames. * * For codecs that do not have this property set, PTS and DTS should always be * equal. */#define AV_CODEC_PROP_REORDER       (1 << 3) /** * Video codec supports separate coding of fields in interlaced frames. */#define AV_CODEC_PROP_FIELDS        (1 << 4) /** * Subtitle codec is bitmap based * Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field. */#define AV_CODEC_PROP_BITMAP_SUB    (1 << 16)/** * Subtitle codec is text based. * Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field. */#define AV_CODEC_PROP_TEXT_SUB      (1 << 17) /** * @return descriptor for given codec ID or NULL if no descriptor exists. */const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id); /** * Iterate over all codec descriptors known to libavcodec. * * @param prev previous descriptor. NULL to get the first descriptor. * * @return next descriptor or NULL after the last descriptor */const AVCodecDescriptor *avcodec_descriptor_next(const AVCodecDescriptor *prev); /** * @return codec descriptor with the given name or NULL if no such descriptor *         exists. */const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name); /** * @} */ #endif // AVCODEC_CODEC_DESC_H