avcodec.h: split AVCodec API into its own header

5 files changed, 469 insertions, 416 deletions

diff --git a/doc/APIchanges b/doc/APIchanges
index 6a03686068..fb5534b5f5 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,9 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2020-xx-xx - xxxxxxxxxx - lavc 58.88.100 - avcodec.h codec.h
+  Move AVCodec-related public API to new header codec.h.
+
 2020-05-23 - xxxxxxxxxx - lavu 56.49.100 - video_enc_params.h
   Add AV_VIDEO_ENC_PARAMS_H264.
 
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 3d38b4a05d..6d816308c7 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -7,6 +7,7 @@ HEADERS = ac3_parser.h                                                  \
           avdct.h                                                       \
           avfft.h                                                       \
           bsf.h                                                         \
+          codec.h                                                       \
           codec_desc.h                                                  \
           codec_id.h                                                    \
           codec_par.h                                                   \
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index f10b7a06ec..4f46a1fb2e 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -42,6 +42,7 @@
 #include "libavutil/rational.h"
 
 #include "bsf.h"
+#include "codec.h"
 #include "codec_desc.h"
 #include "codec_par.h"
 #include "codec_id.h"
@@ -393,138 +394,6 @@ typedef struct RcOverride{
 /* /Fx */
 /* codec capabilities */
 
-/**
- * Decoder can use draw_horiz_band callback.
- */
-#define AV_CODEC_CAP_DRAW_HORIZ_BAND     (1 <<  0)
-/**
- * Codec uses get_buffer() for allocating buffers and supports custom allocators.
- * If not set, it might not use get_buffer() at all or use operations that
- * assume the buffer was allocated by avcodec_default_get_buffer.
- */
-#define AV_CODEC_CAP_DR1                 (1 <<  1)
-#define AV_CODEC_CAP_TRUNCATED           (1 <<  3)
-/**
- * Encoder or decoder requires flushing with NULL input at the end in order to
- * give the complete and correct output.
- *
- * NOTE: If this flag is not set, the codec is guaranteed to never be fed with
- *       with NULL data. The user can still send NULL data to the public encode
- *       or decode function, but libavcodec will not pass it along to the codec
- *       unless this flag is set.
- *
- * Decoders:
- * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
- * avpkt->size=0 at the end to get the delayed data until the decoder no longer
- * returns frames.
- *
- * Encoders:
- * The encoder needs to be fed with NULL data at the end of encoding until the
- * encoder no longer returns data.
- *
- * NOTE: For encoders implementing the AVCodec.encode2() function, setting this
- *       flag also means that the encoder must set the pts and duration for
- *       each output packet. If this flag is not set, the pts and duration will
- *       be determined by libavcodec from the input frame.
- */
-#define AV_CODEC_CAP_DELAY               (1 <<  5)
-/**
- * Codec can be fed a final frame with a smaller size.
- * This can be used to prevent truncation of the last audio samples.
- */
-#define AV_CODEC_CAP_SMALL_LAST_FRAME    (1 <<  6)
-
-/**
- * Codec can output multiple frames per AVPacket
- * Normally demuxers return one frame at a time, demuxers which do not do
- * are connected to a parser to split what they return into proper frames.
- * This flag is reserved to the very rare category of codecs which have a
- * bitstream that cannot be split into frames without timeconsuming
- * operations like full decoding. Demuxers carrying such bitstreams thus
- * may return multiple frames in a packet. This has many disadvantages like
- * prohibiting stream copy in many cases thus it should only be considered
- * as a last resort.
- */
-#define AV_CODEC_CAP_SUBFRAMES           (1 <<  8)
-/**
- * Codec is experimental and is thus avoided in favor of non experimental
- * encoders
- */
-#define AV_CODEC_CAP_EXPERIMENTAL        (1 <<  9)
-/**
- * Codec should fill in channel configuration and samplerate instead of container
- */
-#define AV_CODEC_CAP_CHANNEL_CONF        (1 << 10)
-/**
- * Codec supports frame-level multithreading.
- */
-#define AV_CODEC_CAP_FRAME_THREADS       (1 << 12)
-/**
- * Codec supports slice-based (or partition-based) multithreading.
- */
-#define AV_CODEC_CAP_SLICE_THREADS       (1 << 13)
-/**
- * Codec supports changed parameters at any point.
- */
-#define AV_CODEC_CAP_PARAM_CHANGE        (1 << 14)
-/**
- * Codec supports avctx->thread_count == 0 (auto).
- */
-#define AV_CODEC_CAP_AUTO_THREADS        (1 << 15)
-/**
- * Audio encoder supports receiving a different number of samples in each call.
- */
-#define AV_CODEC_CAP_VARIABLE_FRAME_SIZE (1 << 16)
-/**
- * Decoder is not a preferred choice for probing.
- * This indicates that the decoder is not a good choice for probing.
- * It could for example be an expensive to spin up hardware decoder,
- * or it could simply not provide a lot of useful information about
- * the stream.
- * A decoder marked with this flag should only be used as last resort
- * choice for probing.
- */
-#define AV_CODEC_CAP_AVOID_PROBING       (1 << 17)
-
-#if FF_API_UNUSED_CODEC_CAPS
-/**
- * Deprecated and unused. Use AVCodecDescriptor.props instead
- */
-#define AV_CODEC_CAP_INTRA_ONLY       0x40000000
-/**
- * Deprecated and unused. Use AVCodecDescriptor.props instead
- */
-#define AV_CODEC_CAP_LOSSLESS         0x80000000
-#endif
-
-/**
- * Codec is backed by a hardware implementation. Typically used to
- * identify a non-hwaccel hardware decoder. For information about hwaccels, use
- * avcodec_get_hw_config() instead.
- */
-#define AV_CODEC_CAP_HARDWARE            (1 << 18)
-
-/**
- * Codec is potentially backed by a hardware implementation, but not
- * necessarily. This is used instead of AV_CODEC_CAP_HARDWARE, if the
- * implementation provides some sort of internal fallback.
- */
-#define AV_CODEC_CAP_HYBRID              (1 << 19)
-
-/**
- * This codec takes the reordered_opaque field from input AVFrames
- * and returns it in the corresponding field in AVCodecContext after
- * encoding.
- */
-#define AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE (1 << 20)
-
-/**
- * This encoder can be flushed using avcodec_flush_buffers(). If this flag is
- * not set, the encoder must be closed and reopened to ensure that no frames
- * remain pending.
- */
-#define AV_CODEC_CAP_ENCODER_FLUSH   (1 << 21)
-
 /* Exported side data.
    These flags can be passed in AVCodecContext.export_side_data before initialization.
 */
@@ -2518,228 +2387,8 @@ attribute_deprecated
 void av_codec_set_chroma_intra_matrix(AVCodecContext *avctx, uint16_t *val);
 #endif
 
-/**
- * AVProfile.
- */
-typedef struct AVProfile {
-    int profile;
-    const char *name; ///< short name for the profile
-} AVProfile;
-
-enum {
-    /**
-     * The codec supports this format via the hw_device_ctx interface.
-     *
-     * When selecting this format, AVCodecContext.hw_device_ctx should
-     * have been set to a device of the specified type before calling
-     * avcodec_open2().
-     */
-    AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX = 0x01,
-    /**
-     * The codec supports this format via the hw_frames_ctx interface.
-     *
-     * When selecting this format for a decoder,
-     * AVCodecContext.hw_frames_ctx should be set to a suitable frames
-     * context inside the get_format() callback.  The frames context
-     * must have been created on a device of the specified type.
-     *
-     * When selecting this format for an encoder,
-     * AVCodecContext.hw_frames_ctx should be set to the context which
-     * will be used for the input frames before calling avcodec_open2().
-     */
-    AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX = 0x02,
-    /**
-     * The codec supports this format by some internal method.
-     *
-     * This format can be selected without any additional configuration -
-     * no device or frames context is required.
-     */
-    AV_CODEC_HW_CONFIG_METHOD_INTERNAL      = 0x04,
-    /**
-     * The codec supports this format by some ad-hoc method.
-     *
-     * Additional settings and/or function calls are required.  See the
-     * codec-specific documentation for details.  (Methods requiring
-     * this sort of configuration are deprecated and others should be
-     * used in preference.)
-     */
-    AV_CODEC_HW_CONFIG_METHOD_AD_HOC        = 0x08,
-};
-
-typedef struct AVCodecHWConfig {
-    /**
-     * For decoders, a hardware pixel format which that decoder may be
-     * able to decode to if suitable hardware is available.
-     *
-     * For encoders, a pixel format which the encoder may be able to
-     * accept.  If set to AV_PIX_FMT_NONE, this applies to all pixel
-     * formats supported by the codec.
-     */
-    enum AVPixelFormat pix_fmt;
-    /**
-     * Bit set of AV_CODEC_HW_CONFIG_METHOD_* flags, describing the possible
-     * setup methods which can be used with this configuration.
-     */
-    int methods;
-    /**
-     * The device type associated with the configuration.
-     *
-     * Must be set for AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX and
-     * AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX, otherwise unused.
-     */
-    enum AVHWDeviceType device_type;
-} AVCodecHWConfig;
-
-typedef struct AVCodecDefault AVCodecDefault;
-
 struct AVSubtitle;
 
-/**
- * AVCodec.
- */
-typedef struct AVCodec {
-    /**
-     * Name of the codec implementation.
-     * The name is globally unique among encoders and among decoders (but an
-     * encoder and a decoder can share the same name).
-     * This is the primary way to find a codec from the user perspective.
-     */
-    const char *name;
-    /**
-     * Descriptive name for the codec, meant to be more human readable than name.
-     * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
-     */
-    const char *long_name;
-    enum AVMediaType type;
-    enum AVCodecID id;
-    /**
-     * Codec capabilities.
-     * see AV_CODEC_CAP_*
-     */
-    int capabilities;
-    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
-    const enum AVPixelFormat *pix_fmts;     ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
-    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
-    const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
-    const uint64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
-    uint8_t max_lowres;                     ///< maximum value for lowres supported by the decoder
-    const AVClass *priv_class;              ///< AVClass for the private context
-    const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
-
-    /**
-     * Group name of the codec implementation.
-     * This is a short symbolic name of the wrapper backing this codec. A
-     * wrapper uses some kind of external implementation for the codec, such
-     * as an external library, or a codec implementation provided by the OS or
-     * the hardware.
-     * If this field is NULL, this is a builtin, libavcodec native codec.
-     * If non-NULL, this will be the suffix in AVCodec.name in most cases
-     * (usually AVCodec.name will be of the form "<codec_name>_<wrapper_name>").
-     */
-    const char *wrapper_name;
-
-    /*****************************************************************
-     * No fields below this line are part of the public API. They
-     * may not be used outside of libavcodec and can be changed and
-     * removed at will.
-     * New public fields should be added right above.
-     *****************************************************************
-     */
-    int priv_data_size;
-    struct AVCodec *next;
-    /**
-     * @name Frame-level threading support functions
-     * @{
-     */
-    /**
-     * Copy necessary context variables from a previous thread context to the current one.
-     * If not defined, the next thread will start automatically; otherwise, the codec
-     * must call ff_thread_finish_setup().
-     *
-     * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
-     */
-    int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
-    /** @} */
-
-    /**
-     * Private codec-specific defaults.
-     */
-    const AVCodecDefault *defaults;
-
-    /**
-     * Initialize codec static data, called from avcodec_register().
-     *
-     * This is not intended for time consuming operations as it is
-     * run for every codec regardless of that codec being used.
-     */
-    void (*init_static_data)(struct AVCodec *codec);
-
-    int (*init)(AVCodecContext *);
-    int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size,
-                      const struct AVSubtitle *sub);
-    /**
-     * Encode data to an AVPacket.
-     *
-     * @param      avctx          codec context
-     * @param      avpkt          output AVPacket (may contain a user-provided buffer)
-     * @param[in]  frame          AVFrame containing the raw data to be encoded
-     * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a
-     *                            non-empty packet was returned in avpkt.
-     * @return 0 on success, negative error code on failure
-     */
-    int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame,
-                   int *got_packet_ptr);
-    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
-    int (*close)(AVCodecContext *);
-    /**
-     * Encode API with decoupled packet/frame dataflow. The API is the
-     * same as the avcodec_ prefixed APIs (avcodec_send_frame() etc.), except
-     * that:
-     * - never called if the codec is closed or the wrong type,
-     * - if AV_CODEC_CAP_DELAY is not set, drain frames are never sent,
-     * - only one drain frame is ever passed down,
-     */
-    int (*send_frame)(AVCodecContext *avctx, const AVFrame *frame);
-    int (*receive_packet)(AVCodecContext *avctx, AVPacket *avpkt);
-
-    /**
-     * Decode API with decoupled packet/frame dataflow. This function is called
-     * to get one output frame. It should call ff_decode_get_packet() to obtain
-     * input data.
-     */
-    int (*receive_frame)(AVCodecContext *avctx, AVFrame *frame);
-    /**
-     * Flush buffers.
-     * Will be called when seeking
-     */
-    void (*flush)(AVCodecContext *);
-    /**
-     * Internal codec capabilities.
-     * See FF_CODEC_CAP_* in internal.h
-     */
-    int caps_internal;
-
-    /**
-     * Decoding only, a comma-separated list of bitstream filters to apply to
-     * packets before decoding.
-     */
-    const char *bsfs;
-
-    /**
-     * Array of pointers to hardware configurations supported by the codec,
-     * or NULL if no hardware supported.  The array is terminated by a NULL
-     * pointer.
-     *
-     * The user can only access this field via avcodec_get_hw_config().
-     */
-    const struct AVCodecHWConfigInternal **hw_configs;
-
-    /**
-     * List of supported codec_tags, terminated by FF_CODEC_TAGS_END.
-     */
-    const uint32_t *codec_tags;
-} AVCodec;
-
 #if FF_API_CODEC_GET_SET
 attribute_deprecated
 int av_codec_get_max_lowres(const AVCodec *codec);
@@ -2748,15 +2397,6 @@ int av_codec_get_max_lowres(const AVCodec *codec);
 struct MpegEncContext;
 
 /**
- * Retrieve supported hardware configurations for a codec.
- *
- * Values of index from zero to some maximum return the indexed configuration
- * descriptor; all other values return NULL.  If the codec does not support
- * any hardware configurations then it will always return NULL.
- */
-const AVCodecHWConfig *avcodec_get_hw_config(const AVCodec *codec, int index);
-
-/**
  * @defgroup lavc_hwaccel AVHWAccel
  *
  * @note  Nothing in this structure should be accessed by the user.  At some
@@ -3057,17 +2697,6 @@ typedef struct AVSubtitle {
     int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
 } AVSubtitle;
 
-/**
- * Iterate over all registered codecs.
- *
- * @param opaque a pointer where libavcodec will store the iteration state. Must
- *               point to NULL to start the iteration.
- *
- * @return the next registered codec or NULL when the iteration is
- *         finished
- */
-const AVCodec *av_codec_iterate(void **opaque);
-
 #if FF_API_NEXT
 /**
  * If c is NULL, returns the first registered codec,
@@ -3288,22 +2917,6 @@ void avsubtitle_free(AVSubtitle *sub);
  */
 
 /**
- * Find a registered decoder with a matching codec ID.
- *
- * @param id AVCodecID of the requested decoder
- * @return A decoder if one was found, NULL otherwise.
- */
-AVCodec *avcodec_find_decoder(enum AVCodecID id);
-
-/**
- * Find a registered decoder with the specified name.
- *
- * @param name name of the requested decoder
- * @return A decoder if one was found, NULL otherwise.
- */
-AVCodec *avcodec_find_decoder_by_name(const char *name);
-
-/**
  * The default callback for AVCodecContext.get_buffer2(). It is made public so
  * it can be called by custom get_buffer2() implementations for decoders without
  * AV_CODEC_CAP_DR1 set.
@@ -3993,22 +3606,6 @@ void av_parser_close(AVCodecParserContext *s);
  */
 
 /**
- * Find a registered encoder with a matching codec ID.
- *
- * @param id AVCodecID of the requested encoder
- * @return An encoder if one was found, NULL otherwise.
- */
-AVCodec *avcodec_find_encoder(enum AVCodecID id);
-
-/**
- * Find a registered encoder with the specified name.
- *
- * @param name name of the requested encoder
- * @return An encoder if one was found, NULL otherwise.
- */
-AVCodec *avcodec_find_encoder_by_name(const char *name);
-
-/**
  * Encode a frame of audio.
  *
  * Takes input samples from frame and writes the next output packet, if
@@ -4536,16 +4133,6 @@ const char *avcodec_get_name(enum AVCodecID id);
 int avcodec_is_open(AVCodecContext *s);
 
 /**
- * @return a non-zero number if codec is an encoder, zero otherwise
- */
-int av_codec_is_encoder(const AVCodec *codec);
-
-/**
- * @return a non-zero number if codec is a decoder, zero otherwise
- */
-int av_codec_is_decoder(const AVCodec *codec);
-
-/**
  * Allocate a CPB properties structure and initialize its fields to default
  * values.
  *
diff --git a/libavcodec/codec.h b/libavcodec/codec.h
new file mode 100644
index 0000000000..1fda619ee7
--- /dev/null
+++ b/libavcodec/codec.h
@@ -0,0 +1,462 @@
+/*
+ * AVCodec 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_H
+#define AVCODEC_CODEC_H
+
+#include <stdint.h>
+
+#include "libavutil/avutil.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/log.h"
+#include "libavutil/pixfmt.h"
+#include "libavutil/rational.h"
+#include "libavutil/samplefmt.h"
+
+#include "libavcodec/codec_id.h"
+#include "libavcodec/version.h"
+
+/**
+ * @addtogroup lavc_core
+ * @{
+ */
+
+/**
+ * Decoder can use draw_horiz_band callback.
+ */
+#define AV_CODEC_CAP_DRAW_HORIZ_BAND     (1 <<  0)
+/**
+ * Codec uses get_buffer() for allocating buffers and supports custom allocators.
+ * If not set, it might not use get_buffer() at all or use operations that
+ * assume the buffer was allocated by avcodec_default_get_buffer.
+ */
+#define AV_CODEC_CAP_DR1                 (1 <<  1)
+#define AV_CODEC_CAP_TRUNCATED           (1 <<  3)
+/**
+ * Encoder or decoder requires flushing with NULL input at the end in order to
+ * give the complete and correct output.
+ *
+ * NOTE: If this flag is not set, the codec is guaranteed to never be fed with
+ *       with NULL data. The user can still send NULL data to the public encode
+ *       or decode function, but libavcodec will not pass it along to the codec
+ *       unless this flag is set.
+ *
+ * Decoders:
+ * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
+ * avpkt->size=0 at the end to get the delayed data until the decoder no longer
+ * returns frames.
+ *
+ * Encoders:
+ * The encoder needs to be fed with NULL data at the end of encoding until the
+ * encoder no longer returns data.
+ *
+ * NOTE: For encoders implementing the AVCodec.encode2() function, setting this
+ *       flag also means that the encoder must set the pts and duration for
+ *       each output packet. If this flag is not set, the pts and duration will
+ *       be determined by libavcodec from the input frame.
+ */
+#define AV_CODEC_CAP_DELAY               (1 <<  5)
+/**
+ * Codec can be fed a final frame with a smaller size.
+ * This can be used to prevent truncation of the last audio samples.
+ */
+#define AV_CODEC_CAP_SMALL_LAST_FRAME    (1 <<  6)
+
+/**
+ * Codec can output multiple frames per AVPacket
+ * Normally demuxers return one frame at a time, demuxers which do not do
+ * are connected to a parser to split what they return into proper frames.
+ * This flag is reserved to the very rare category of codecs which have a
+ * bitstream that cannot be split into frames without timeconsuming
+ * operations like full decoding. Demuxers carrying such bitstreams thus
+ * may return multiple frames in a packet. This has many disadvantages like
+ * prohibiting stream copy in many cases thus it should only be considered
+ * as a last resort.
+ */
+#define AV_CODEC_CAP_SUBFRAMES           (1 <<  8)
+/**
+ * Codec is experimental and is thus avoided in favor of non experimental
+ * encoders
+ */
+#define AV_CODEC_CAP_EXPERIMENTAL        (1 <<  9)
+/**
+ * Codec should fill in channel configuration and samplerate instead of container
+ */
+#define AV_CODEC_CAP_CHANNEL_CONF        (1 << 10)
+/**
+ * Codec supports frame-level multithreading.
+ */
+#define AV_CODEC_CAP_FRAME_THREADS       (1 << 12)
+/**
+ * Codec supports slice-based (or partition-based) multithreading.
+ */
+#define AV_CODEC_CAP_SLICE_THREADS       (1 << 13)
+/**
+ * Codec supports changed parameters at any point.
+ */
+#define AV_CODEC_CAP_PARAM_CHANGE        (1 << 14)
+/**
+ * Codec supports avctx->thread_count == 0 (auto).
+ */
+#define AV_CODEC_CAP_AUTO_THREADS        (1 << 15)
+/**
+ * Audio encoder supports receiving a different number of samples in each call.
+ */
+#define AV_CODEC_CAP_VARIABLE_FRAME_SIZE (1 << 16)
+/**
+ * Decoder is not a preferred choice for probing.
+ * This indicates that the decoder is not a good choice for probing.
+ * It could for example be an expensive to spin up hardware decoder,
+ * or it could simply not provide a lot of useful information about
+ * the stream.
+ * A decoder marked with this flag should only be used as last resort
+ * choice for probing.
+ */
+#define AV_CODEC_CAP_AVOID_PROBING       (1 << 17)
+
+#if FF_API_UNUSED_CODEC_CAPS
+/**
+ * Deprecated and unused. Use AVCodecDescriptor.props instead
+ */
+#define AV_CODEC_CAP_INTRA_ONLY       0x40000000
+/**
+ * Deprecated and unused. Use AVCodecDescriptor.props instead
+ */
+#define AV_CODEC_CAP_LOSSLESS         0x80000000
+#endif
+
+/**
+ * Codec is backed by a hardware implementation. Typically used to
+ * identify a non-hwaccel hardware decoder. For information about hwaccels, use
+ * avcodec_get_hw_config() instead.
+ */
+#define AV_CODEC_CAP_HARDWARE            (1 << 18)
+
+/**
+ * Codec is potentially backed by a hardware implementation, but not
+ * necessarily. This is used instead of AV_CODEC_CAP_HARDWARE, if the
+ * implementation provides some sort of internal fallback.
+ */
+#define AV_CODEC_CAP_HYBRID              (1 << 19)
+
+/**
+ * This codec takes the reordered_opaque field from input AVFrames
+ * and returns it in the corresponding field in AVCodecContext after
+ * encoding.
+ */
+#define AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE (1 << 20)
+
+/**
+ * This encoder can be flushed using avcodec_flush_buffers(). If this flag is
+ * not set, the encoder must be closed and reopened to ensure that no frames
+ * remain pending.
+ */
+#define AV_CODEC_CAP_ENCODER_FLUSH   (1 << 21)
+
+/**
+ * AVProfile.
+ */
+typedef struct AVProfile {
+    int profile;
+    const char *name; ///< short name for the profile
+} AVProfile;
+
+typedef struct AVCodecDefault AVCodecDefault;
+
+struct AVCodecContext;
+struct AVSubtitle;
+struct AVPacket;
+
+/**
+ * AVCodec.
+ */
+typedef struct AVCodec {
+    /**
+     * Name of the codec implementation.
+     * The name is globally unique among encoders and among decoders (but an
+     * encoder and a decoder can share the same name).
+     * This is the primary way to find a codec from the user perspective.
+     */
+    const char *name;
+    /**
+     * Descriptive name for the codec, meant to be more human readable than name.
+     * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
+     */
+    const char *long_name;
+    enum AVMediaType type;
+    enum AVCodecID id;
+    /**
+     * Codec capabilities.
+     * see AV_CODEC_CAP_*
+     */
+    int capabilities;
+    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
+    const enum AVPixelFormat *pix_fmts;     ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
+    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
+    const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
+    const uint64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
+    uint8_t max_lowres;                     ///< maximum value for lowres supported by the decoder
+    const AVClass *priv_class;              ///< AVClass for the private context
+    const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
+
+    /**
+     * Group name of the codec implementation.
+     * This is a short symbolic name of the wrapper backing this codec. A
+     * wrapper uses some kind of external implementation for the codec, such
+     * as an external library, or a codec implementation provided by the OS or
+     * the hardware.
+     * If this field is NULL, this is a builtin, libavcodec native codec.
+     * If non-NULL, this will be the suffix in AVCodec.name in most cases
+     * (usually AVCodec.name will be of the form "<codec_name>_<wrapper_name>").
+     */
+    const char *wrapper_name;
+
+    /*****************************************************************
+     * No fields below this line are part of the public API. They
+     * may not be used outside of libavcodec and can be changed and
+     * removed at will.
+     * New public fields should be added right above.
+     *****************************************************************
+     */
+    int priv_data_size;
+    struct AVCodec *next;
+    /**
+     * @name Frame-level threading support functions
+     * @{
+     */
+    /**
+     * Copy necessary context variables from a previous thread context to the current one.
+     * If not defined, the next thread will start automatically; otherwise, the codec
+     * must call ff_thread_finish_setup().
+     *
+     * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
+     */
+    int (*update_thread_context)(struct AVCodecContext *dst, const struct AVCodecContext *src);
+    /** @} */
+
+    /**
+     * Private codec-specific defaults.
+     */
+    const AVCodecDefault *defaults;
+
+    /**
+     * Initialize codec static data, called from avcodec_register().
+     *
+     * This is not intended for time consuming operations as it is
+     * run for every codec regardless of that codec being used.
+     */
+    void (*init_static_data)(struct AVCodec *codec);
+
+    int (*init)(struct AVCodecContext *);
+    int (*encode_sub)(struct AVCodecContext *, uint8_t *buf, int buf_size,
+                      const struct AVSubtitle *sub);
+    /**
+     * Encode data to an AVPacket.
+     *
+     * @param      avctx          codec context
+     * @param      avpkt          output AVPacket (may contain a user-provided buffer)
+     * @param[in]  frame          AVFrame containing the raw data to be encoded
+     * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a
+     *                            non-empty packet was returned in avpkt.
+     * @return 0 on success, negative error code on failure
+     */
+    int (*encode2)(struct AVCodecContext *avctx, struct AVPacket *avpkt,
+                   const struct AVFrame *frame, int *got_packet_ptr);
+    int (*decode)(struct AVCodecContext *, void *outdata, int *outdata_size, struct AVPacket *avpkt);
+    int (*close)(struct AVCodecContext *);
+    /**
+     * Encode API with decoupled packet/frame dataflow. The API is the
+     * same as the avcodec_ prefixed APIs (avcodec_send_frame() etc.), except
+     * that:
+     * - never called if the codec is closed or the wrong type,
+     * - if AV_CODEC_CAP_DELAY is not set, drain frames are never sent,
+     * - only one drain frame is ever passed down,
+     */
+    int (*send_frame)(struct AVCodecContext *avctx, const struct AVFrame *frame);
+    int (*receive_packet)(struct AVCodecContext *avctx, struct AVPacket *avpkt);
+
+    /**
+     * Decode API with decoupled packet/frame dataflow. This function is called
+     * to get one output frame. It should call ff_decode_get_packet() to obtain
+     * input data.
+     */
+    int (*receive_frame)(struct AVCodecContext *avctx, struct AVFrame *frame);
+    /**
+     * Flush buffers.
+     * Will be called when seeking
+     */
+    void (*flush)(struct AVCodecContext *);
+    /**
+     * Internal codec capabilities.
+     * See FF_CODEC_CAP_* in internal.h
+     */
+    int caps_internal;
+
+    /**
+     * Decoding only, a comma-separated list of bitstream filters to apply to
+     * packets before decoding.
+     */
+    const char *bsfs;
+
+    /**
+     * Array of pointers to hardware configurations supported by the codec,
+     * or NULL if no hardware supported.  The array is terminated by a NULL
+     * pointer.
+     *
+     * The user can only access this field via avcodec_get_hw_config().
+     */
+    const struct AVCodecHWConfigInternal **hw_configs;
+
+    /**
+     * List of supported codec_tags, terminated by FF_CODEC_TAGS_END.
+     */
+    const uint32_t *codec_tags;
+} AVCodec;
+
+/**
+ * Iterate over all registered codecs.
+ *
+ * @param opaque a pointer where libavcodec will store the iteration state. Must
+ *               point to NULL to start the iteration.
+ *
+ * @return the next registered codec or NULL when the iteration is
+ *         finished
+ */
+const AVCodec *av_codec_iterate(void **opaque);
+
+/**
+ * Find a registered decoder with a matching codec ID.
+ *
+ * @param id AVCodecID of the requested decoder
+ * @return A decoder if one was found, NULL otherwise.
+ */
+AVCodec *avcodec_find_decoder(enum AVCodecID id);
+
+/**
+ * Find a registered decoder with the specified name.
+ *
+ * @param name name of the requested decoder
+ * @return A decoder if one was found, NULL otherwise.
+ */
+AVCodec *avcodec_find_decoder_by_name(const char *name);
+
+/**
+ * Find a registered encoder with a matching codec ID.
+ *
+ * @param id AVCodecID of the requested encoder
+ * @return An encoder if one was found, NULL otherwise.
+ */
+AVCodec *avcodec_find_encoder(enum AVCodecID id);
+
+/**
+ * Find a registered encoder with the specified name.
+ *
+ * @param name name of the requested encoder
+ * @return An encoder if one was found, NULL otherwise.
+ */
+AVCodec *avcodec_find_encoder_by_name(const char *name);
+/**
+ * @return a non-zero number if codec is an encoder, zero otherwise
+ */
+int av_codec_is_encoder(const AVCodec *codec);
+
+/**
+ * @return a non-zero number if codec is a decoder, zero otherwise
+ */
+int av_codec_is_decoder(const AVCodec *codec);
+
+enum {
+    /**
+     * The codec supports this format via the hw_device_ctx interface.
+     *
+     * When selecting this format, AVCodecContext.hw_device_ctx should
+     * have been set to a device of the specified type before calling
+     * avcodec_open2().
+     */
+    AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX = 0x01,
+    /**
+     * The codec supports this format via the hw_frames_ctx interface.
+     *
+     * When selecting this format for a decoder,
+     * AVCodecContext.hw_frames_ctx should be set to a suitable frames
+     * context inside the get_format() callback.  The frames context
+     * must have been created on a device of the specified type.
+     *
+     * When selecting this format for an encoder,
+     * AVCodecContext.hw_frames_ctx should be set to the context which
+     * will be used for the input frames before calling avcodec_open2().
+     */
+    AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX = 0x02,
+    /**
+     * The codec supports this format by some internal method.
+     *
+     * This format can be selected without any additional configuration -
+     * no device or frames context is required.
+     */
+    AV_CODEC_HW_CONFIG_METHOD_INTERNAL      = 0x04,
+    /**
+     * The codec supports this format by some ad-hoc method.
+     *
+     * Additional settings and/or function calls are required.  See the
+     * codec-specific documentation for details.  (Methods requiring
+     * this sort of configuration are deprecated and others should be
+     * used in preference.)
+     */
+    AV_CODEC_HW_CONFIG_METHOD_AD_HOC        = 0x08,
+};
+
+typedef struct AVCodecHWConfig {
+    /**
+     * For decoders, a hardware pixel format which that decoder may be
+     * able to decode to if suitable hardware is available.
+     *
+     * For encoders, a pixel format which the encoder may be able to
+     * accept.  If set to AV_PIX_FMT_NONE, this applies to all pixel
+     * formats supported by the codec.
+     */
+    enum AVPixelFormat pix_fmt;
+    /**
+     * Bit set of AV_CODEC_HW_CONFIG_METHOD_* flags, describing the possible
+     * setup methods which can be used with this configuration.
+     */
+    int methods;
+    /**
+     * The device type associated with the configuration.
+     *
+     * Must be set for AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX and
+     * AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX, otherwise unused.
+     */
+    enum AVHWDeviceType device_type;
+} AVCodecHWConfig;
+
+/**
+ * Retrieve supported hardware configurations for a codec.
+ *
+ * Values of index from zero to some maximum return the indexed configuration
+ * descriptor; all other values return NULL.  If the codec does not support
+ * any hardware configurations then it will always return NULL.
+ */
+const AVCodecHWConfig *avcodec_get_hw_config(const AVCodec *codec, int index);
+
+/**
+ * @}
+ */
+
+#endif /* AVCODEC_CODEC_H */
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 238e6db9e0..2d2cc69ab6 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -28,8 +28,8 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  58
-#define LIBAVCODEC_VERSION_MINOR  87
-#define LIBAVCODEC_VERSION_MICRO 101
+#define LIBAVCODEC_VERSION_MINOR  88
+#define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \