/*
* copyright (c) 2001 Fabrice Bellard
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/log.h"
#include "libavutil/pixfmt.h"
#include "libavutil/rational.h"
+#include "libavutil/audioconvert.h"
#include "libavcodec/version.h"
/**
*
* If you add a codec ID to this list, add it so that
* 1. no value of a existing codec ID changes (that would break ABI),
- * 2. it is as close as possible to similar codecs.
+ * 2. Give it a value which when taken as ASCII is recognized uniquely by a human as this specific codec.
+ * This ensures that 2 forks can independantly add CodecIDs without producing conflicts.
*/
enum CodecID {
CODEC_ID_NONE,
CODEC_ID_WMV3IMAGE,
CODEC_ID_VC1IMAGE,
#if LIBAVCODEC_VERSION_MAJOR == 53
- CODEC_ID_G723_1,
- CODEC_ID_G729,
+ CODEC_ID_G723_1_DEPRECATED,
+ CODEC_ID_G729_DEPRECATED,
#endif
- CODEC_ID_UTVIDEO,
+ CODEC_ID_UTVIDEO_DEPRECATED,
CODEC_ID_BMV_VIDEO,
CODEC_ID_VBLE,
CODEC_ID_DXTORY,
CODEC_ID_V410,
CODEC_ID_XWD,
+ CODEC_ID_Y41P = MKBETAG('Y','4','1','P'),
+ CODEC_ID_UTVIDEO = 0x800,
+ CODEC_ID_ESCAPE130 = MKBETAG('E','1','3','0'),
+ CODEC_ID_AVRP = MKBETAG('A','V','R','P'),
+
+ CODEC_ID_G2M = MKBETAG( 0 ,'G','2','M'),
+ CODEC_ID_V308 = MKBETAG('V','3','0','8'),
+ CODEC_ID_YUV4 = MKBETAG('Y','U','V','4'),
/* various PCM "codecs" */
CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
CODEC_ID_MACE3,
CODEC_ID_MACE6,
CODEC_ID_VMDAUDIO,
-#if LIBAVCODEC_VERSION_MAJOR == 53
- CODEC_ID_SONIC,
- CODEC_ID_SONIC_LS,
-#endif
CODEC_ID_FLAC,
CODEC_ID_MP3ADU,
CODEC_ID_MP3ON4,
CODEC_ID_QDMC,
CODEC_ID_CELT,
#if LIBAVCODEC_VERSION_MAJOR > 53
- CODEC_ID_G723_1,
- CODEC_ID_G729,
+ CODEC_ID_G723_1_DEPRECATED,
+ CODEC_ID_G729_DEPRECATED,
CODEC_ID_8SVX_EXP,
CODEC_ID_8SVX_FIB,
#endif
CODEC_ID_BMV_AUDIO,
+ CODEC_ID_G729 = 0x15800,
+ CODEC_ID_G723_1= 0x15801,
+ CODEC_ID_FFWAVESYNTH = MKBETAG('F','F','W','S'),
+ CODEC_ID_8SVX_RAW = MKBETAG('8','S','V','X'),
+ CODEC_ID_SONIC = MKBETAG('S','O','N','C'),
+ CODEC_ID_SONIC_LS = MKBETAG('S','O','N','L'),
/* subtitle codecs */
CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
CODEC_ID_HDMV_PGS_SUBTITLE,
CODEC_ID_DVB_TELETEXT,
CODEC_ID_SRT,
+ CODEC_ID_MICRODVD = MKBETAG('m','D','V','D'),
/* other specific kind of codecs (generally used for attachments) */
CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
CODEC_ID_TTF = 0x18000,
+ CODEC_ID_BINTEXT = MKBETAG('B','T','X','T'),
+ CODEC_ID_XBIN = MKBETAG('X','B','I','N'),
+ CODEC_ID_IDF = MKBETAG( 0 ,'I','D','F'),
CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
* Note: If the first 23 bits of the additional bytes are not 0, then damaged
* MPEG bitstreams could cause overread and segfault.
*/
-#define FF_INPUT_BUFFER_PADDING_SIZE 8
+#define FF_INPUT_BUFFER_PADDING_SIZE 16
/**
* minimum encoding buffer size
AVCOL_TRC_UNSPECIFIED=2,
AVCOL_TRC_GAMMA22 =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
AVCOL_TRC_GAMMA28 =5, ///< also ITU-R BT470BG
+ AVCOL_TRC_SMPTE240M =7,
AVCOL_TRC_NB , ///< Not part of ABI
};
AVCOL_SPC_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
AVCOL_SPC_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
AVCOL_SPC_SMPTE240M =7,
+ AVCOL_SPC_YCGCO =8,
AVCOL_SPC_NB , ///< Not part of ABI
};
#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
+#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format. DEPRECATED!!!!
#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
-/**
- * @defgroup deprecated_flags Deprecated codec flags
- * Use corresponding private codec options instead.
- * @{
- */
-#if FF_API_MJPEG_GLOBAL_OPTS
-#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
-#endif
-#if FF_API_SNOW_GLOBAL_OPTS
-#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
-#endif
-#if FF_API_LAME_GLOBAL_OPTS
-#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
-#endif
-/**
- * @}
- */
+#define CODEC_FLAG2_SHOW_ALL 0x00400000 ///< Show all frames before the first keyframe
/* Unsupported options :
* Syntax Arithmetic coding (SAC)
* assume the buffer was allocated by avcodec_default_get_buffer.
*/
#define CODEC_CAP_DR1 0x0002
-#if FF_API_PARSE_FRAME
-/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
-#define CODEC_CAP_PARSE_ONLY 0x0004
-#endif
#define CODEC_CAP_TRUNCATED 0x0008
/* Codec can export data for HW decoding (XvMC). */
#define CODEC_CAP_HWACCEL 0x0010
* Codec should fill in channel configuration and samplerate instead of container
*/
#define CODEC_CAP_CHANNEL_CONF 0x0400
+
/**
* Codec is able to deal with negative linesizes
*/
#define CODEC_CAP_NEG_LINESIZES 0x0800
+
/**
* Codec supports frame-level multithreading.
*/
* Audio encoder supports receiving a different number of samples in each call.
*/
#define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000
+/**
+ * Codec is lossless.
+ */
+#define CODEC_CAP_LOSSLESS 0x80000000
//The following defines may change, don't expect compatibility if you use them.
#define MB_TYPE_INTRA4x4 0x0001
/**
* Audio Video Frame.
* New fields can be added to the end of AVFRAME with minor version
- * bumps. Removal, reordering and changes to existing fields require
+ * bumps. Similarly fields that are marked as to be only accessed by
+ * av_opt_ptr() can be reordered. This allows 2 forks to add fields
+ * without breaking compatibility with each other.
+ * Removal, reordering and changes in the remaining cases require
* a major version bump.
- * sizeof(AVFrame) must not be used outside libav*.
+ * sizeof(AVFrame) must not be used outside libavcodec.
*/
typedef struct AVFrame {
-#if FF_API_DATA_POINTERS
-#define AV_NUM_DATA_POINTERS 4
-#else
#define AV_NUM_DATA_POINTERS 8
-#endif
/**
* pointer to the picture/channel planes.
* This might be different from the first allocated byte
*/
int quality;
-#if FF_API_AVFRAME_AGE
- /**
- * @deprecated unused
- */
- attribute_deprecated int age;
-#endif
-
/**
* is this picture used as reference
* The values for this are the same as the MpegEncContext.picture_structure
int64_t reordered_opaque;
/**
- * hardware accelerator private data (Libav-allocated)
+ * hardware accelerator private data (FFmpeg-allocated)
* - encoding: unused
* - decoding: Set by libavcodec
*/
* - decoding: Read by user.
*/
int format;
+
+ /**
+ * frame timestamp estimated using various heuristics, in stream time base
+ * Code outside libavcodec should access this field using:
+ * av_opt_ptr(avcodec_get_frame_class(), frame, "best_effort_timestamp");
+ * - encoding: unused
+ * - decoding: set by libavcodec, read by user.
+ */
+ int64_t best_effort_timestamp;
+
+ /**
+ * reordered pos from the last AVPacket that has been input into the decoder
+ * Code outside libavcodec should access this field using:
+ * av_opt_ptr(avcodec_get_frame_class(), frame, "pkt_pos");
+ * - encoding: unused
+ * - decoding: Read by user.
+ */
+ int64_t pkt_pos;
+
} AVFrame;
struct AVCodecInternal;
* New fields can be added to the end with minor version bumps.
* Removal, reordering and changes to existing fields require a major
* version bump.
+ * Please use AVOptions (av_opt* / av_set/get*()) to access these fields from user
+ * applications.
* sizeof(AVCodecContext) must not be used outside libav*.
*/
typedef struct AVCodecContext {
int frame_number; ///< audio or video frame number
/**
- * Number of frames the decoded output will be delayed relative to
- * the encoded input.
+ * Encoding: Number of frames delay there will be from the encoder input to
+ * the decoder output. (we assume the decoder matches the spec)
+ * Decoding: Number of frames delay in addition to what a standard decoder
+ * as specified in the spec would produce.
* - encoding: Set by libavcodec.
- * - decoding: unused
+ * - decoding: Set by libavcodec.
*/
int delay;
*/
float b_quant_offset;
-#if FF_API_ER
- /**
- * Error recognition; higher values will detect more errors but may
- * misdetect some more or less valid parts as errors.
- * - encoding: unused
- * - decoding: Set by user.
- */
- attribute_deprecated int error_recognition;
-#define FF_ER_CAREFUL 1
-#define FF_ER_COMPLIANT 2
-#define FF_ER_AGGRESSIVE 3
-#define FF_ER_VERY_AGGRESSIVE 4
-#define FF_ER_EXPLODE 5
-#endif /* FF_API_ER */
-
/**
* Called at the beginning of each frame to get a buffer for it.
*
*/
int block_align;
-#if FF_API_PARSE_FRAME
- /**
- * If true, only parsing is done. The frame data is returned.
- * Only MPEG audio decoders support this now.
- * - encoding: unused
- * - decoding: Set by user
- */
- attribute_deprecated int parse_only;
-#endif
-
/**
* 0-> h263 quant 1-> mpeg quant
* - encoding: Set by user.
*/
int color_table_id;
-#if FF_API_INTERNAL_CONTEXT
- /**
- * internal_buffer count
- * Don't touch, used by libavcodec default_get_buffer().
- * @deprecated this field was moved to an internal context
- */
- attribute_deprecated int internal_buffer_count;
-
- /**
- * internal_buffers
- * Don't touch, used by libavcodec default_get_buffer().
- * @deprecated this field was moved to an internal context
- */
- attribute_deprecated void *internal_buffer;
-#endif
-
/**
* Global quality for codecs which cannot change it per frame.
* This should be proportional to MPEG-1/2/4 qscale.
int max_prediction_order;
/**
- * GOP timecode frame start number, in non drop frame format
- * - encoding: Set by user.
- * - decoding: unused
+ * GOP timecode frame start number
+ * - encoding: Set by user, in non drop frame format
+ * - decoding: Set by libavcodec (timecode in the 25 bits format, -1 if unset)
*/
int64_t timecode_frame_start;
int request_channels;
#endif
-#if FF_API_DRC_SCALE
- /**
- * Percentage of dynamic range compression to be applied by the decoder.
- * The default value is 1.0, corresponding to full compression.
- * - encoding: unused
- * - decoding: Set by user.
- * @deprecated use AC3 decoder private option instead.
- */
- attribute_deprecated float drc_scale;
-#endif
-
/**
* opaque 64bit number (generally a PTS) that will be reordered and
* output in AVFrame.reordered_opaque
/**
* Audio channel layout.
* - encoding: set by user.
- * - decoding: set by libavcodec.
+ * - decoding: set by user, may be overwritten by libavcodec.
*/
uint64_t channel_layout;
* Hardware accelerator context.
* For some hardware accelerators, a global context needs to be
* provided by the user. In that case, this holds display-dependent
- * data Libav cannot instantiate itself. Please refer to the
- * Libav HW accelerator documentation to know how to fill this
+ * data FFmpeg cannot instantiate itself. Please refer to the
+ * FFmpeg HW accelerator documentation to know how to fill this
* is. e.g. for VA API, this is a struct vaapi_context.
* - encoding: unused
* - decoding: Set by user
*/
AVPacket *pkt;
-#if FF_API_INTERNAL_CONTEXT
- /**
- * Whether this is a copy of the context which had init() called on it.
- * This is used by multithreading - shared tables and picture pointers
- * should be freed from the original context only.
- * - encoding: Set by libavcodec.
- * - decoding: Set by libavcodec.
- *
- * @deprecated this field has been moved to an internal context
- */
- attribute_deprecated int is_copy;
-#endif
-
/**
* Which multithreading methods to use.
* Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
enum AVAudioServiceType audio_service_type;
/**
- * Used to request a sample format from the decoder.
- * - encoding: unused.
+ * desired sample format
+ * - encoding: Not used.
* - decoding: Set by user.
+ * Decoder will decode to this format if it can.
*/
enum AVSampleFormat request_sample_fmt;
#define AV_EF_BUFFER (1<<2)
#define AV_EF_EXPLODE (1<<3)
+#define AV_EF_CAREFUL (1<<16)
+#define AV_EF_COMPLIANT (1<<17)
+#define AV_EF_AGGRESSIVE (1<<18)
+
/**
* Private context used for internal data.
*
* - decoding: Set by libavcodec
*/
enum AVFieldOrder field_order;
+
+ /**
+ * Current statistics for PTS correction.
+ * - decoding: maintained and used by libavcodec, not intended to be used by user apps
+ * - encoding: unused
+ */
+ int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far
+ int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far
+ int64_t pts_correction_last_pts; /// PTS of the last frame
+ int64_t pts_correction_last_dts; /// DTS of the last frame
+
} AVCodecContext;
/**
uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
int *size);
+int av_packet_merge_side_data(AVPacket *pkt);
+
+int av_packet_split_side_data(AVPacket *pkt);
+
+
/* resample.c */
struct ReSampleContext;
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
+/**
+ * Get the name of a codec.
+ * @return a static string identifying the codec; never NULL
+ */
+const char *avcodec_get_name(enum CodecID id);
+
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
/**
* @param[in] dst_pix_fmt destination pixel format
* @param[in] src_pix_fmt source pixel format
* @param[in] has_alpha Whether the source pixel format alpha channel is used.
- * @return Combination of flags informing you what kind of losses will occur.
+ * @return Combination of flags informing you what kind of losses will occur
+ * (maximum loss for an invalid dst_pix_fmt).
*/
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
int has_alpha);
* The pixel formats from which it chooses one, are determined by the
* pix_fmt_mask parameter.
*
+ * Note, only the first 64 pixel formats will fit in pix_fmt_mask.
+ *
* @code
* src_pix_fmt = PIX_FMT_YUV420P;
- * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
+ * pix_fmt_mask = (1 << PIX_FMT_YUV422P) | (1 << PIX_FMT_RGB24);
* dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
* @endcode
*
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
int has_alpha, int *loss_ptr);
-#if FF_API_GET_ALPHA_INFO
-#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
-#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
-
/**
- * Tell if an image really has transparent alpha values.
- * @return ored mask of FF_ALPHA_xxx constants
+ * Find the best pixel format to convert to given a certain source pixel
+ * format and a selection of two destination pixel formats. When converting from
+ * one pixel format to another, information loss may occur. For example, when converting
+ * from RGB24 to GRAY, the color information will be lost. Similarly, other losses occur when
+ * converting from some formats to other formats. avcodec_find_best_pix_fmt2() selects which of
+ * the given pixel formats should be used to suffer the least amount of loss.
+ *
+ * If one of the destination formats is PIX_FMT_NONE the other pixel format (if valid) will be
+ * returned.
+ *
+ * @code
+ * src_pix_fmt = PIX_FMT_YUV420P;
+ * dst_pix_fmt1= PIX_FMT_RGB24;
+ * dst_pix_fmt2= PIX_FMT_GRAY8;
+ * dst_pix_fmt3= PIX_FMT_RGB8;
+ * loss= FF_LOSS_CHROMA; // don't care about chroma loss, so chroma loss will be ignored.
+ * dst_pix_fmt = avcodec_find_best_pix_fmt2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, alpha, &loss);
+ * dst_pix_fmt = avcodec_find_best_pix_fmt2(dst_pix_fmt, dst_pix_fmt3, src_pix_fmt, alpha, &loss);
+ * @endcode
+ *
+ * @param[in] dst_pix_fmt1 One of the two destination pixel formats to choose from
+ * @param[in] dst_pix_fmt2 The other of the two destination pixel formats to choose from
+ * @param[in] src_pix_fmt Source pixel format
+ * @param[in] has_alpha Whether the source pixel format alpha channel is used.
+ * @param[in, out] loss_ptr Combination of loss flags. In: selects which of the losses to ignore, i.e.
+ * NULL or value of zero means we care about all losses. Out: the loss
+ * that occurs when converting from src to selected dst pixel format.
+ * @return The best pixel format to convert to or -1 if none was found.
*/
-attribute_deprecated
-int img_get_alpha_info(const AVPicture *src,
- enum PixelFormat pix_fmt, int width, int height);
-#endif
+enum PixelFormat avcodec_find_best_pix_fmt2(enum PixelFormat dst_pix_fmt1, enum PixelFormat dst_pix_fmt2,
+ enum PixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
+
/* deinterlace a picture */
/* deinterlace - if not supported return -1 */
*/
const char *avcodec_license(void);
-#if FF_API_AVCODEC_INIT
-/**
- * @deprecated this function is called automatically from avcodec_register()
- * and avcodec_register_all(), there is no need to call it manually
- */
-attribute_deprecated
-void avcodec_init(void);
-#endif
-
/**
* Register the codec codec and initialize libavcodec.
*
*/
const char *av_get_profile_name(const AVCodec *codec, int profile);
+#if FF_API_ALLOC_CONTEXT
+/**
+ * Set the fields of the given AVCodecContext to default values.
+ *
+ * @param s The AVCodecContext of which the fields should be set to default values.
+ * @deprecated use avcodec_get_context_defaults3
+ */
+attribute_deprecated
+void avcodec_get_context_defaults(AVCodecContext *s);
+
+/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
+ * we WILL change its arguments and name a few times! */
+attribute_deprecated
+void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
+#endif
+
/**
* Set the fields of the given AVCodecContext to default values corresponding
* to the given codec (defaults may be codec-dependent).
*/
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
+#if FF_API_ALLOC_CONTEXT
+/**
+ * Allocate an AVCodecContext and set its fields to default values. The
+ * resulting struct can be deallocated by simply calling av_free().
+ *
+ * @return An AVCodecContext filled with default values or NULL on failure.
+ * @see avcodec_get_context_defaults
+ *
+ * @deprecated use avcodec_alloc_context3()
+ */
+attribute_deprecated
+AVCodecContext *avcodec_alloc_context(void);
+
+/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
+ * we WILL change its arguments and name a few times! */
+attribute_deprecated
+AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
+#endif
+
/**
* Allocate an AVCodecContext and set its fields to default values. The
* resulting struct can be deallocated by simply calling av_free().
*/
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
int *got_picture_ptr,
- AVPacket *avpkt);
+ const AVPacket *avpkt);
/**
* Decode a subtitle message.
*/
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
+/**
+ * Same behaviour av_fast_malloc but the buffer has additional
+ * FF_INPUT_PADDING_SIZE at the end which will will always be 0.
+ *
+ * In addition the whole buffer will initially and after resizes
+ * be 0-initialized so that no uninitialized data will ever appear.
+ */
+void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
+
/**
* Copy image src to dst. Wraps av_picture_data_copy() above.
*/
/**
* Log a generic warning message about a missing feature. This function is
- * intended to be used internally by Libav (libavcodec, libavformat, etc.)
+ * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
* only, and would normally not be used by applications.
* @param[in] avc a pointer to an arbitrary struct of which the first field is
* a pointer to an AVClass struct
/**
* Log a generic warning message asking for a sample. This function is
- * intended to be used internally by Libav (libavcodec, libavformat, etc.)
+ * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
* only, and would normally not be used by applications.
* @param[in] avc a pointer to an arbitrary struct of which the first field is
* a pointer to an AVClass struct
* lockmgr should store/get a pointer to a user allocated mutex. It's
* NULL upon AV_LOCK_CREATE and != NULL for all other ops.
*
- * @param cb User defined callback. Note: Libav may invoke calls to this
+ * @param cb User defined callback. Note: FFmpeg may invoke calls to this
* callback during the call to av_lockmgr_register().
* Thus, the application must be prepared to handle that.
* If cb is set to NULL the lockmgr will be unregistered.
*/
const AVClass *avcodec_get_class(void);
+/**
+ * Get the AVClass for AVFrame. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
+ *
+ * @see av_opt_find().
+ */
+const AVClass *avcodec_get_frame_class(void);
+
#endif /* AVCODEC_AVCODEC_H */
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