Merge remote-tracking branch 'qatar/master'

* qatar/master: (22 commits)
  rv40dsp x86: use only one register, for both increment and loop counter
  rv40dsp: implement prescaled versions for biweight.
  avconv: use default channel layouts when they are unknown
  avconv: parse channel layout string
  nutdec: K&R formatting cosmetics
  vda: Signal 4 byte NAL headers to the decoder regardless of what's in the extradata
  mem: Consistently return NULL for av_malloc(0)
  vf_overlay: implement poll_frame()
  vf_scale: support named constants for sws flags.
  lavc doxy: add all installed headers to doxy groups.
  lavc doxy: add avfft to the main lavc group.
  lavc doxy: add remaining avcodec.h functions to a misc doxygen group.
  lavc doxy: add AVPicture functions to a doxy group.
  lavc doxy: add resampling functions to a doxy group.
  lavc doxy: replace \ with /
  lavc doxy: add encoding functions to a doxy group.
  lavc doxy: add decoding functions to a doxy group.
  lavc doxy: fix formatting of AV_PKT_DATA_{PARAM_CHANGE,H263_MB_INFO}
  lavc doxy: add AVPacket-related stuff to a separate doxy group.
  lavc doxy: add core functions/definitions to a doxy group.
  ...

Conflicts:
	ffmpeg.c
	libavcodec/avcodec.h
	libavcodec/vda.c
	libavcodec/x86/rv40dsp.asm
	libavfilter/vf_scale.c
	libavformat/nutdec.c
	libavutil/mem.c
	tests/ref/acodec/pcm_s24daud

Merged-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 881 insertions, 766 deletions

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 56fc15cad1..d905a019e0 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -68,6 +68,14 @@
  *
  */
 
+/**
+ * @defgroup lavc_core Core functions/structures.
+ * @ingroup libavc
+ *
+ * Basic definitions, functions for querying libavcodec capabilities,
+ * allocating core structures, etc.
+ * @{
+ */
 
 /**
  * Identify the syntax and semantics of the bitstream.
@@ -438,6 +446,7 @@ enum CodecID {
 #endif
 
 /**
+ * @ingroup lavc_decoding
  * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
  * This is mainly needed because some optimized bitstream readers read
  * 32 or 64 bit at once and could read over the end.<br>
@@ -447,6 +456,7 @@ enum CodecID {
 #define FF_INPUT_BUFFER_PADDING_SIZE 16
 
 /**
+ * @ingroup lavc_encoding
  * minimum encoding buffer size
  * Used to avoid some checks during header writing.
  */
@@ -454,6 +464,7 @@ enum CodecID {
 
 
 /**
+ * @ingroup lavc_encoding
  * motion estimation type.
  */
 enum Motion_Est_ID {
@@ -469,6 +480,9 @@ enum Motion_Est_ID {
     ME_TESA,        ///< transformed exhaustive search algorithm
 };
 
+/**
+ * @ingroup lavc_decoding
+ */
 enum AVDiscard{
     /* We leave some space between them for extensions (drop some
      * keyframes for intra-only or drop just some bidir frames). */
@@ -548,6 +562,9 @@ enum AVAudioServiceType {
     AV_AUDIO_SERVICE_TYPE_NB                   , ///< Not part of ABI
 };
 
+/**
+ * @ingroup lavc_encoding
+ */
 typedef struct RcOverride{
     int start_frame;
     int end_frame;
@@ -773,10 +790,52 @@ typedef struct AVPanScan{
 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
 
+/**
+ * @defgroup lavc_packet AVPacket
+ *
+ * Types and functions for working with AVPacket.
+ * @{
+ */
 enum AVPacketSideDataType {
     AV_PKT_DATA_PALETTE,
     AV_PKT_DATA_NEW_EXTRADATA,
+
+    /**
+     * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
+     * @code
+     * u32le param_flags
+     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
+     *     s32le channel_count
+     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
+     *     u64le channel_layout
+     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
+     *     s32le sample_rate
+     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
+     *     s32le width
+     *     s32le height
+     * @endcode
+     */
     AV_PKT_DATA_PARAM_CHANGE,
+
+    /**
+     * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
+     * structures with info about macroblocks relevant to splitting the
+     * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
+     * That is, it does not necessarily contain info about all macroblocks,
+     * as long as the distance between macroblocks in the info is smaller
+     * than the target payload size.
+     * Each MB info structure is 12 bytes, and is laid out as follows:
+     * @code
+     * u32le bit offset from the start of the packet
+     * u8    current quantizer at the start of the macroblock
+     * u8    GOB number
+     * u16le macroblock address within the GOB
+     * u8    horizontal MV predictor
+     * u8    vertical MV predictor
+     * u8    horizontal MV predictor for block number 3
+     * u8    vertical MV predictor for block number 3
+     * @endcode
+     */
     AV_PKT_DATA_H263_MB_INFO,
 };
 
@@ -846,44 +905,15 @@ typedef struct AVPacket {
 #define AV_PKT_FLAG_KEY     0x0001 ///< The packet contains a keyframe
 #define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
 
-/**
- * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
- * u32le param_flags
- * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
- *     s32le channel_count
- * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
- *     u64le channel_layout
- * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
- *     s32le sample_rate
- * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
- *     s32le width
- *     s32le height
- */
-
-/**
- * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
- * structures with info about macroblocks relevant to splitting the
- * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
- * That is, it does not necessarily contain info about all macroblocks,
- * as long as the distance between macroblocks in the info is smaller
- * than the target payload size.
- * Each MB info structure is 12 bytes, and is laid out as follows:
- * u32le bit offset from the start of the packet
- * u8    current quantizer at the start of the macroblock
- * u8    GOB number
- * u16le macroblock address within the GOB
- * u8    horizontal MV predictor
- * u8    vertical MV predictor
- * u8    horizontal MV predictor for block number 3
- * u8    vertical MV predictor for block number 3
- */
-
 enum AVSideDataParamChangeFlags {
     AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT  = 0x0001,
     AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002,
     AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE    = 0x0004,
     AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS     = 0x0008,
 };
+/**
+ * @}
+ */
 
 /**
  * Audio Video Frame.
@@ -982,7 +1012,7 @@ typedef struct AVFrame {
     uint8_t *base[AV_NUM_DATA_POINTERS];
 
     /**
-     * sample aspect ratio for the video frame, 0/1 if unknown\unspecified
+     * sample aspect ratio for the video frame, 0/1 if unknown/unspecified
      * - encoding: unused
      * - decoding: Read by user.
      */
@@ -3049,6 +3079,13 @@ typedef struct AVHWAccel {
 } AVHWAccel;
 
 /**
+ * @defgroup lavc_picture AVPicture
+ *
+ * Functions for working with AVPicture
+ * @{
+ */
+
+/**
  * four components are given, that's all.
  * the last component is alpha
  */
@@ -3057,6 +3094,10 @@ typedef struct AVPicture {
     int linesize[AV_NUM_DATA_POINTERS];     ///< number of bytes per line
 } AVPicture;
 
+/**
+ * @}
+ */
+
 #define AVPALETTE_SIZE 1024
 #define AVPALETTE_COUNT 256
 
@@ -3111,544 +3152,374 @@ typedef struct AVSubtitle {
     int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
 } AVSubtitle;
 
-/* packet functions */
-
-/**
- * @deprecated use NULL instead
- */
-attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
-
 /**
- * Default packet destructor.
+ * If c is NULL, returns the first registered codec,
+ * if c is non-NULL, returns the next registered codec after c,
+ * or NULL if c is the last one.
  */
-void av_destruct_packet(AVPacket *pkt);
+AVCodec *av_codec_next(AVCodec *c);
 
 /**
- * Initialize optional fields of a packet with default values.
- *
- * @param pkt packet
+ * Return the LIBAVCODEC_VERSION_INT constant.
  */
-void av_init_packet(AVPacket *pkt);
+unsigned avcodec_version(void);
 
 /**
- * Allocate the payload of a packet and initialize its fields with
- * default values.
- *
- * @param pkt packet
- * @param size wanted payload size
- * @return 0 if OK, AVERROR_xxx otherwise
+ * Return the libavcodec build-time configuration.
  */
-int av_new_packet(AVPacket *pkt, int size);
+const char *avcodec_configuration(void);
 
 /**
- * Reduce packet size, correctly zeroing padding
- *
- * @param pkt packet
- * @param size new size
+ * Return the libavcodec license.
  */
-void av_shrink_packet(AVPacket *pkt, int size);
+const char *avcodec_license(void);
 
 /**
- * Increase packet size, correctly zeroing padding
+ * Register the codec codec and initialize libavcodec.
  *
- * @param pkt packet
- * @param grow_by number of bytes by which to increase the size of the packet
- */
-int av_grow_packet(AVPacket *pkt, int grow_by);
-
-/**
- * @warning This is a hack - the packet memory allocation stuff is broken. The
- * packet is allocated if it was not really allocated.
- */
-int av_dup_packet(AVPacket *pkt);
-
-/**
- * Free a packet.
+ * @warning either this function or avcodec_register_all() must be called
+ * before any other libavcodec functions.
  *
- * @param pkt packet to free
+ * @see avcodec_register_all()
  */
-void av_free_packet(AVPacket *pkt);
+void avcodec_register(AVCodec *codec);
 
 /**
- * Allocate new information of a packet.
+ * Register all the codecs, parsers and bitstream filters which were enabled at
+ * configuration time. If you do not call this function you can select exactly
+ * which formats you want to support, by using the individual registration
+ * functions.
  *
- * @param pkt packet
- * @param type side information type
- * @param size side information size
- * @return pointer to fresh allocated data or NULL otherwise
+ * @see avcodec_register
+ * @see av_register_codec_parser
+ * @see av_register_bitstream_filter
  */
-uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
-                                 int size);
+void avcodec_register_all(void);
 
-/**
- * Shrink the already allocated side data buffer
- *
- * @param pkt packet
- * @param type side information type
- * @param size new side information size
- * @return 0 on success, < 0 on failure
- */
-int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
-                               int size);
 
+#if FF_API_ALLOC_CONTEXT
 /**
- * Get side information from packet.
+ * Allocate an AVCodecContext and set its fields to default values.  The
+ * resulting struct can be deallocated by simply calling av_free().
  *
- * @param pkt packet
- * @param type desired side information type
- * @param size pointer for side information size to store (optional)
- * @return pointer to data if present or NULL otherwise
- */
-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;
-struct AVResampleContext;
-
-typedef struct ReSampleContext ReSampleContext;
-
-/**
- *  Initialize audio resampling context.
+ * @return An AVCodecContext filled with default values or NULL on failure.
+ * @see avcodec_get_context_defaults
  *
- * @param output_channels  number of output channels
- * @param input_channels   number of input channels
- * @param output_rate      output sample rate
- * @param input_rate       input sample rate
- * @param sample_fmt_out   requested output sample format
- * @param sample_fmt_in    input sample format
- * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff frequency
- * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
- * @param linear           if 1 then the used FIR filter will be linearly interpolated
-                           between the 2 closest, if 0 the closest will be used
- * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
- * @return allocated ReSampleContext, NULL if error occurred
+ * @deprecated use avcodec_alloc_context3()
  */
-ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
-                                        int output_rate, int input_rate,
-                                        enum AVSampleFormat sample_fmt_out,
-                                        enum AVSampleFormat sample_fmt_in,
-                                        int filter_length, int log2_phase_count,
-                                        int linear, double cutoff);
+attribute_deprecated
+AVCodecContext *avcodec_alloc_context(void);
 
-int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
+/** 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);
 
 /**
- * Free resample context.
+ * Set the fields of the given AVCodecContext to default values.
  *
- * @param s a non-NULL pointer to a resample context previously
- *          created with av_audio_resample_init()
- */
-void audio_resample_close(ReSampleContext *s);
-
-
-/**
- * Initialize an audio resampler.
- * Note, if either rate is not an integer then simply scale both rates up so they are.
- * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
- * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
- * @param linear If 1 then the used FIR filter will be linearly interpolated
-                 between the 2 closest, if 0 the closest will be used
- * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
- */
-struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
-
-/**
- * Resample an array of samples using a previously configured context.
- * @param src an array of unconsumed samples
- * @param consumed the number of samples of src which have been consumed are returned here
- * @param src_size the number of unconsumed samples available
- * @param dst_size the amount of space in samples available in dst
- * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
- * @return the number of samples written in dst or -1 if an error occurred
+ * @param s The AVCodecContext of which the fields should be set to default values.
+ * @deprecated use avcodec_get_context_defaults3
  */
-int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
+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
 
 /**
- * Compensate samplerate/timestamp drift. The compensation is done by changing
- * the resampler parameters, so no audible clicks or similar distortions occur
- * @param compensation_distance distance in output samples over which the compensation should be performed
- * @param sample_delta number of output samples which should be output less
+ * Allocate an AVCodecContext and set its fields to default values.  The
+ * resulting struct can be deallocated by calling avcodec_close() on it followed
+ * by av_free().
  *
- * example: av_resample_compensate(c, 10, 500)
- * here instead of 510 samples only 500 samples would be output
+ * @param codec if non-NULL, allocate private data and initialize defaults
+ *              for the given codec. It is illegal to then call avcodec_open2()
+ *              with a different codec.
+ *              If NULL, then the codec-specific defaults won't be initialized,
+ *              which may result in suboptimal default settings (this is
+ *              important mainly for encoders, e.g. libx264).
  *
- * note, due to rounding the actual compensation might be slightly different,
- * especially if the compensation_distance is large and the in_rate used during init is small
+ * @return An AVCodecContext filled with default values or NULL on failure.
+ * @see avcodec_get_context_defaults
  */
-void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
-void av_resample_close(struct AVResampleContext *c);
+AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
 
 /**
- * Allocate memory for a picture.  Call avpicture_free() to free it.
- *
- * @see avpicture_fill()
+ * Set the fields of the given AVCodecContext to default values corresponding
+ * to the given codec (defaults may be codec-dependent).
  *
- * @param picture the picture to be filled in
- * @param pix_fmt the format of the picture
- * @param width the width of the picture
- * @param height the height of the picture
- * @return zero if successful, a negative value if not
+ * Do not call this function if a non-NULL codec has been passed
+ * to avcodec_alloc_context3() that allocated this AVCodecContext.
+ * If codec is non-NULL, it is illegal to call avcodec_open2() with a
+ * different codec on this AVCodecContext.
  */
-int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
+int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
 
 /**
- * Free a picture previously allocated by avpicture_alloc().
- * The data buffer used by the AVPicture is freed, but the AVPicture structure
- * itself is not.
+ * Get the AVClass for AVCodecContext. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
  *
- * @param picture the AVPicture to be freed
+ * @see av_opt_find().
  */
-void avpicture_free(AVPicture *picture);
+const AVClass *avcodec_get_class(void);
 
 /**
- * Fill in the AVPicture fields.
- * The fields of the given AVPicture are filled in by using the 'ptr' address
- * which points to the image data buffer. Depending on the specified picture
- * format, one or multiple image data pointers and line sizes will be set.
- * If a planar format is specified, several pointers will be set pointing to
- * the different picture planes and the line sizes of the different planes
- * will be stored in the lines_sizes array.
- * Call with ptr == NULL to get the required size for the ptr buffer.
- *
- * To allocate the buffer and fill in the AVPicture fields in one call,
- * use avpicture_alloc().
+ * Get the AVClass for AVFrame. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
  *
- * @param picture AVPicture whose fields are to be filled in
- * @param ptr Buffer which will contain or contains the actual image data
- * @param pix_fmt The format in which the picture data is stored.
- * @param width the width of the image in pixels
- * @param height the height of the image in pixels
- * @return size of the image data in bytes
+ * @see av_opt_find().
  */
-int avpicture_fill(AVPicture *picture, uint8_t *ptr,
-                   enum PixelFormat pix_fmt, int width, int height);
+const AVClass *avcodec_get_frame_class(void);
 
 /**
- * Copy pixel data from an AVPicture into a buffer.
- * The data is stored compactly, without any gaps for alignment or padding
- * which may be applied by avpicture_fill().
- *
- * @see avpicture_get_size()
+ * Copy the settings of the source AVCodecContext into the destination
+ * AVCodecContext. The resulting destination codec context will be
+ * unopened, i.e. you are required to call avcodec_open2() before you
+ * can use this AVCodecContext to decode/encode video/audio data.
  *
- * @param[in] src AVPicture containing image data
- * @param[in] pix_fmt The format in which the picture data is stored.
- * @param[in] width the width of the image in pixels.
- * @param[in] height the height of the image in pixels.
- * @param[out] dest A buffer into which picture data will be copied.
- * @param[in] dest_size The size of 'dest'.
- * @return The number of bytes written to dest, or a negative value (error code) on error.
+ * @param dest target codec context, should be initialized with
+ *             avcodec_alloc_context3(), but otherwise uninitialized
+ * @param src source codec context
+ * @return AVERROR() on error (e.g. memory allocation error), 0 on success
  */
-int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
-                     unsigned char *dest, int dest_size);
+int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
 
 /**
- * Calculate the size in bytes that a picture of the given width and height
- * would occupy if stored in the given picture format.
- * Note that this returns the size of a compact representation as generated
- * by avpicture_layout(), which can be smaller than the size required for e.g.
- * avpicture_fill().
+ * Allocate an AVFrame and set its fields to default values.  The resulting
+ * struct can be deallocated by simply calling av_free().
  *
- * @param pix_fmt the given picture format
- * @param width the width of the image
- * @param height the height of the image
- * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
- */
-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);
-
-/**
- * Return a value representing the fourCC code associated to the
- * pixel format pix_fmt, or 0 if no associated fourCC code can be
- * found.
+ * @return An AVFrame filled with default values or NULL on failure.
+ * @see avcodec_get_frame_defaults
  */
-unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
+AVFrame *avcodec_alloc_frame(void);
 
 /**
- * Put a string representing the codec tag codec_tag in buf.
+ * Set the fields of the given AVFrame to default values.
  *
- * @param buf_size size in bytes of buf
- * @return the length of the string that would have been generated if
- * enough space had been available, excluding the trailing null
+ * @param pic The AVFrame of which the fields should be set to default values.
  */
-size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
-
-#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
-#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
-#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
-#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
-#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
-#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
+void avcodec_get_frame_defaults(AVFrame *pic);
 
+#if FF_API_AVCODEC_OPEN
 /**
- * Compute what kind of losses will occur when converting from one specific
- * pixel format to another.
- * 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. These losses can involve loss of chroma, but also loss of
- * resolution, loss of color depth, loss due to the color space conversion, loss
- * of the alpha bits or loss due to color quantization.
- * avcodec_get_fix_fmt_loss() informs you about the various types of losses
- * which will occur when converting from one pixel format to another.
+ * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
+ * function the context has to be allocated.
  *
- * @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
- * (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);
-
-/**
- * Find the best pixel format to convert to given a certain source pixel
- * format.  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_fmt() searches which of
- * the given pixel formats should be used to suffer the least amount of loss.
- * The pixel formats from which it chooses one, are determined by the
- * pix_fmt_mask parameter.
+ * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
+ * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
+ * retrieving a codec.
  *
- * Note, only the first 64 pixel formats will fit in pix_fmt_mask.
+ * @warning This function is not thread safe!
  *
  * @code
- * src_pix_fmt = PIX_FMT_YUV420P;
- * 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);
+ * avcodec_register_all();
+ * codec = avcodec_find_decoder(CODEC_ID_H264);
+ * if (!codec)
+ *     exit(1);
+ *
+ * context = avcodec_alloc_context3(codec);
+ *
+ * if (avcodec_open(context, codec) < 0)
+ *     exit(1);
  * @endcode
  *
- * @param[in] pix_fmt_mask bitmask determining which pixel format 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[out] loss_ptr Combination of flags informing you what kind of losses will occur.
- * @return The best pixel format to convert to or -1 if none was found.
+ * @param avctx The context which will be set up to use the given codec.
+ * @param codec The codec to use within the context.
+ * @return zero on success, a negative value on error
+ * @see avcodec_alloc_context3, avcodec_find_decoder, avcodec_find_encoder, avcodec_close
+ *
+ * @deprecated use avcodec_open2
  */
-enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
-                              int has_alpha, int *loss_ptr);
+attribute_deprecated
+int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
+#endif
 
 /**
- * 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.
+ * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
+ * function the context has to be allocated with avcodec_alloc_context3().
  *
- * If one of the destination formats is PIX_FMT_NONE the other pixel format (if valid) will be
- * returned.
+ * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
+ * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
+ * retrieving a codec.
+ *
+ * @warning This function is not thread safe!
  *
  * @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);
+ * avcodec_register_all();
+ * av_dict_set(&opts, "b", "2.5M", 0);
+ * codec = avcodec_find_decoder(CODEC_ID_H264);
+ * if (!codec)
+ *     exit(1);
+ *
+ * context = avcodec_alloc_context3(codec);
+ *
+ * if (avcodec_open2(context, codec, opts) < 0)
+ *     exit(1);
  * @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.
+ * @param avctx The context to initialize.
+ * @param codec The codec to open this context for. If a non-NULL codec has been
+ *              previously passed to avcodec_alloc_context3() or
+ *              avcodec_get_context_defaults3() for this context, then this
+ *              parameter MUST be either NULL or equal to the previously passed
+ *              codec.
+ * @param options A dictionary filled with AVCodecContext and codec-private options.
+ *                On return this object will be filled with options that were not found.
+ *
+ * @return zero on success, a negative value on error
+ * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(),
+ *      av_dict_set(), av_opt_find().
  */
-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);
-
+int avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options);
 
-/* deinterlace a picture */
-/* deinterlace - if not supported return -1 */
-int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
-                          enum PixelFormat pix_fmt, int width, int height);
+/**
+ * Close a given AVCodecContext and free all the data associated with it
+ * (but not the AVCodecContext itself).
+ *
+ * Calling this function on an AVCodecContext that hasn't been opened will free
+ * the codec-specific data allocated in avcodec_alloc_context3() /
+ * avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will
+ * do nothing.
+ */
+int avcodec_close(AVCodecContext *avctx);
 
-/* external high level API */
+/**
+ * Free all allocated data in the given subtitle struct.
+ *
+ * @param sub AVSubtitle to free.
+ */
+void avsubtitle_free(AVSubtitle *sub);
 
 /**
- * If c is NULL, returns the first registered codec,
- * if c is non-NULL, returns the next registered codec after c,
- * or NULL if c is the last one.
+ * @}
  */
-AVCodec *av_codec_next(AVCodec *c);
 
 /**
- * Return the LIBAVCODEC_VERSION_INT constant.
+ * @addtogroup lavc_packet
+ * @{
  */
-unsigned avcodec_version(void);
 
 /**
- * Return the libavcodec build-time configuration.
+ * @deprecated use NULL instead
  */
-const char *avcodec_configuration(void);
+attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
 
 /**
- * Return the libavcodec license.
+ * Default packet destructor.
  */
-const char *avcodec_license(void);
+void av_destruct_packet(AVPacket *pkt);
 
 /**
- * Register the codec codec and initialize libavcodec.
- *
- * @warning either this function or avcodec_register_all() must be called
- * before any other libavcodec functions.
+ * Initialize optional fields of a packet with default values.
  *
- * @see avcodec_register_all()
+ * @param pkt packet
  */
-void avcodec_register(AVCodec *codec);
+void av_init_packet(AVPacket *pkt);
 
 /**
- * Find a registered encoder with a matching codec ID.
+ * Allocate the payload of a packet and initialize its fields with
+ * default values.
  *
- * @param id CodecID of the requested encoder
- * @return An encoder if one was found, NULL otherwise.
+ * @param pkt packet
+ * @param size wanted payload size
+ * @return 0 if OK, AVERROR_xxx otherwise
  */
-AVCodec *avcodec_find_encoder(enum CodecID id);
+int av_new_packet(AVPacket *pkt, int size);
 
 /**
- * Find a registered encoder with the specified name.
+ * Reduce packet size, correctly zeroing padding
  *
- * @param name name of the requested encoder
- * @return An encoder if one was found, NULL otherwise.
+ * @param pkt packet
+ * @param size new size
  */
-AVCodec *avcodec_find_encoder_by_name(const char *name);
+void av_shrink_packet(AVPacket *pkt, int size);
 
 /**
- * Find a registered decoder with a matching codec ID.
+ * Increase packet size, correctly zeroing padding
  *
- * @param id CodecID of the requested decoder
- * @return A decoder if one was found, NULL otherwise.
+ * @param pkt packet
+ * @param grow_by number of bytes by which to increase the size of the packet
  */
-AVCodec *avcodec_find_decoder(enum CodecID id);
+int av_grow_packet(AVPacket *pkt, int grow_by);
 
 /**
- * Find a registered decoder with the specified name.
- *
- * @param name name of the requested decoder
- * @return A decoder if one was found, NULL otherwise.
+ * @warning This is a hack - the packet memory allocation stuff is broken. The
+ * packet is allocated if it was not really allocated.
  */
-AVCodec *avcodec_find_decoder_by_name(const char *name);
-void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
+int av_dup_packet(AVPacket *pkt);
 
 /**
- * Return a name for the specified profile, if available.
+ * Free a packet.
  *
- * @param codec the codec that is searched for the given profile
- * @param profile the profile value for which a name is requested
- * @return A name for the profile if found, NULL otherwise.
+ * @param pkt packet to free
  */
-const char *av_get_profile_name(const AVCodec *codec, int profile);
+void av_free_packet(AVPacket *pkt);
 
-#if FF_API_ALLOC_CONTEXT
 /**
- * Set the fields of the given AVCodecContext to default values.
+ * Allocate new information of a packet.
  *
- * @param s The AVCodecContext of which the fields should be set to default values.
- * @deprecated use avcodec_get_context_defaults3
+ * @param pkt packet
+ * @param type side information type
+ * @param size side information size
+ * @return pointer to fresh allocated data or NULL otherwise
  */
-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
+uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+                                 int size);
 
 /**
- * Set the fields of the given AVCodecContext to default values corresponding
- * to the given codec (defaults may be codec-dependent).
+ * Shrink the already allocated side data buffer
  *
- * Do not call this function if a non-NULL codec has been passed
- * to avcodec_alloc_context3() that allocated this AVCodecContext.
- * If codec is non-NULL, it is illegal to call avcodec_open2() with a
- * different codec on this AVCodecContext.
+ * @param pkt packet
+ * @param type side information type
+ * @param size new side information size
+ * @return 0 on success, < 0 on failure
  */
-int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
+int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+                               int size);
 
-#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
+ * Get side information from packet.
  *
- * @deprecated use avcodec_alloc_context3()
+ * @param pkt packet
+ * @param type desired side information type
+ * @param size pointer for side information size to store (optional)
+ * @return pointer to data if present or NULL otherwise
  */
-attribute_deprecated
-AVCodecContext *avcodec_alloc_context(void);
+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);
 
-/** 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 calling avcodec_close() on it followed
- * by av_free().
- *
- * @param codec if non-NULL, allocate private data and initialize defaults
- *              for the given codec. It is illegal to then call avcodec_open2()
- *              with a different codec.
- *              If NULL, then the codec-specific defaults won't be initialized,
- *              which may result in suboptimal default settings (this is
- *              important mainly for encoders, e.g. libx264).
- *
- * @return An AVCodecContext filled with default values or NULL on failure.
- * @see avcodec_get_context_defaults
+ * @}
  */
-AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
 
 /**
- * Copy the settings of the source AVCodecContext into the destination
- * AVCodecContext. The resulting destination codec context will be
- * unopened, i.e. you are required to call avcodec_open2() before you
- * can use this AVCodecContext to decode/encode video/audio data.
- *
- * @param dest target codec context, should be initialized with
- *             avcodec_alloc_context3(), but otherwise uninitialized
- * @param src source codec context
- * @return AVERROR() on error (e.g. memory allocation error), 0 on success
+ * @addtogroup lavc_decoding
+ * @{
  */
-int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
 
 /**
- * Set the fields of the given AVFrame to default values.
+ * Find a registered decoder with a matching codec ID.
  *
- * @param pic The AVFrame of which the fields should be set to default values.
+ * @param id CodecID of the requested decoder
+ * @return A decoder if one was found, NULL otherwise.
  */
-void avcodec_get_frame_defaults(AVFrame *pic);
+AVCodec *avcodec_find_decoder(enum CodecID id);
 
 /**
- * Allocate an AVFrame and set its fields to default values.  The resulting
- * struct can be deallocated by simply calling av_free().
+ * Find a registered decoder with the specified name.
  *
- * @return An AVFrame filled with default values or NULL on failure.
- * @see avcodec_get_frame_defaults
+ * @param name name of the requested decoder
+ * @return A decoder if one was found, NULL otherwise.
  */
-AVFrame *avcodec_alloc_frame(void);
+AVCodec *avcodec_find_decoder_by_name(const char *name);
 
 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
@@ -3662,6 +3533,7 @@ int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
  * @return Required padding in pixels.
  */
 unsigned avcodec_get_edge_width(void);
+
 /**
  * Modify width and height values so that they will result in a memory
  * buffer that is acceptable for the codec if you do not use any horizontal
@@ -3672,6 +3544,7 @@ unsigned avcodec_get_edge_width(void);
  * according to avcodec_get_edge_width() before.
  */
 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
+
 /**
  * Modify width and height values so that they will result in a memory
  * buffer that is acceptable for the codec if you also ensure that all
@@ -3684,84 +3557,6 @@ void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
                                int linesize_align[AV_NUM_DATA_POINTERS]);
 
-enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
-
-int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
-int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
-//FIXME func typedef
-
-#if FF_API_AVCODEC_OPEN
-/**
- * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
- * function the context has to be allocated.
- *
- * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
- * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
- * retrieving a codec.
- *
- * @warning This function is not thread safe!
- *
- * @code
- * avcodec_register_all();
- * codec = avcodec_find_decoder(CODEC_ID_H264);
- * if (!codec)
- *     exit(1);
- *
- * context = avcodec_alloc_context3(codec);
- *
- * if (avcodec_open(context, codec) < 0)
- *     exit(1);
- * @endcode
- *
- * @param avctx The context which will be set up to use the given codec.
- * @param codec The codec to use within the context.
- * @return zero on success, a negative value on error
- * @see avcodec_alloc_context3, avcodec_find_decoder, avcodec_find_encoder, avcodec_close
- *
- * @deprecated use avcodec_open2
- */
-attribute_deprecated
-int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
-#endif
-
-/**
- * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
- * function the context has to be allocated with avcodec_alloc_context3().
- *
- * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
- * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
- * retrieving a codec.
- *
- * @warning This function is not thread safe!
- *
- * @code
- * avcodec_register_all();
- * av_dict_set(&opts, "b", "2.5M", 0);
- * codec = avcodec_find_decoder(CODEC_ID_H264);
- * if (!codec)
- *     exit(1);
- *
- * context = avcodec_alloc_context3(codec);
- *
- * if (avcodec_open2(context, codec, opts) < 0)
- *     exit(1);
- * @endcode
- *
- * @param avctx The context to initialize.
- * @param codec The codec to open this context for. If a non-NULL codec has been
- *              previously passed to avcodec_alloc_context3() or
- *              avcodec_get_context_defaults3() for this context, then this
- *              parameter MUST be either NULL or equal to the previously passed
- *              codec.
- * @param options A dictionary filled with AVCodecContext and codec-private options.
- *                On return this object will be filled with options that were not found.
- *
- * @return zero on success, a negative value on error
- * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(),
- *      av_dict_set(), av_opt_find().
- */
-int avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options);
-
 #if FF_API_OLD_DECODE_AUDIO
 /**
  * Wrapper function which calls avcodec_decode_audio4.
@@ -3924,236 +3719,10 @@ int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
                             AVPacket *avpkt);
 
 /**
- * Free all allocated data in the given subtitle struct.
- *
- * @param sub AVSubtitle to free.
- */
-void avsubtitle_free(AVSubtitle *sub);
-
-#if FF_API_OLD_ENCODE_AUDIO
-/**
- * Encode an audio frame from samples into buf.
- *
- * @deprecated Use avcodec_encode_audio2 instead.
- *
- * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
- * However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user
- * will know how much space is needed because it depends on the value passed
- * in buf_size as described below. In that case a lower value can be used.
- *
- * @param avctx the codec context
- * @param[out] buf the output buffer
- * @param[in] buf_size the output buffer size
- * @param[in] samples the input buffer containing the samples
- * The number of samples read from this buffer is frame_size*channels,
- * both of which are defined in avctx.
- * For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of
- * samples read from samples is equal to:
- * buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id))
- * This also implies that av_get_bits_per_sample() must not return 0 for these
- * codecs.
- * @return On error a negative value is returned, on success zero or the number
- * of bytes used to encode the data read from the input buffer.
- */
-int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx,
-                                              uint8_t *buf, int buf_size,
-                                              const short *samples);
-#endif
-
-/**
- * Encode a frame of audio.
- *
- * Takes input samples from frame and writes the next output packet, if
- * available, to avpkt. The output packet does not necessarily contain data for
- * the most recent frame, as encoders can delay, split, and combine input frames
- * internally as needed.
- *
- * @param avctx     codec context
- * @param avpkt     output AVPacket.
- *                  The user can supply an output buffer by setting
- *                  avpkt->data and avpkt->size prior to calling the
- *                  function, but if the size of the user-provided data is not
- *                  large enough, encoding will fail. All other AVPacket fields
- *                  will be reset by the encoder using av_init_packet(). If
- *                  avpkt->data is NULL, the encoder will allocate it.
- *                  The encoder will set avpkt->size to the size of the
- *                  output packet.
- *
- *                  If this function fails or produces no output, avpkt will be
- *                  freed using av_free_packet() (i.e. avpkt->destruct will be
- *                  called to free the user supplied buffer).
- * @param[in] frame AVFrame containing the raw audio data to be encoded.
- *                  May be NULL when flushing an encoder that has the
- *                  CODEC_CAP_DELAY capability set.
- *                  There are 2 codec capabilities that affect the allowed
- *                  values of frame->nb_samples.
- *                  If CODEC_CAP_SMALL_LAST_FRAME is set, then only the final
- *                  frame may be smaller than avctx->frame_size, and all other
- *                  frames must be equal to avctx->frame_size.
- *                  If CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
- *                  can have any number of samples.
- *                  If neither is set, frame->nb_samples must be equal to
- *                  avctx->frame_size for all frames.
- * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
- *                            output packet is non-empty, and to 0 if it is
- *                            empty. If the function returns an error, the
- *                            packet can be assumed to be invalid, and the
- *                            value of got_packet_ptr is undefined and should
- *                            not be used.
- * @return          0 on success, negative error code on failure
- */
-int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt,
-                          const AVFrame *frame, int *got_packet_ptr);
-
-/**
- * Fill audio frame data and linesize.
- * AVFrame extended_data channel pointers are allocated if necessary for
- * planar audio.
- *
- * @param frame       the AVFrame
- *                    frame->nb_samples must be set prior to calling the
- *                    function. This function fills in frame->data,
- *                    frame->extended_data, frame->linesize[0].
- * @param nb_channels channel count
- * @param sample_fmt  sample format
- * @param buf         buffer to use for frame data
- * @param buf_size    size of buffer
- * @param align       plane size sample alignment (0 = default)
- * @return            0 on success, negative error code on failure
- */
-int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
-                             enum AVSampleFormat sample_fmt, const uint8_t *buf,
-                             int buf_size, int align);
-
-#if FF_API_OLD_ENCODE_VIDEO
-/**
- * @deprecated use avcodec_encode_video2() instead.
- *
- * Encode a video frame from pict into buf.
- * The input picture should be
- * stored using a specific format, namely avctx.pix_fmt.
- *
- * @param avctx the codec context
- * @param[out] buf the output buffer for the bitstream of encoded frame
- * @param[in] buf_size the size of the output buffer in bytes
- * @param[in] pict the input picture to encode
- * @return On error a negative value is returned, on success zero or the number
- * of bytes used from the output buffer.
- */
-attribute_deprecated
-int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
-                         const AVFrame *pict);
-#endif
-
-/**
- * Encode a frame of video.
- *
- * Takes input raw video data from frame and writes the next output packet, if
- * available, to avpkt. The output packet does not necessarily contain data for
- * the most recent frame, as encoders can delay and reorder input frames
- * internally as needed.
- *
- * @param avctx     codec context
- * @param avpkt     output AVPacket.
- *                  The user can supply an output buffer by setting
- *                  avpkt->data and avpkt->size prior to calling the
- *                  function, but if the size of the user-provided data is not
- *                  large enough, encoding will fail. All other AVPacket fields
- *                  will be reset by the encoder using av_init_packet(). If
- *                  avpkt->data is NULL, the encoder will allocate it.
- *                  The encoder will set avpkt->size to the size of the
- *                  output packet. The returned data (if any) belongs to the
- *                  caller, he is responsible for freeing it.
- *
- *                  If this function fails or produces no output, avpkt will be
- *                  freed using av_free_packet() (i.e. avpkt->destruct will be
- *                  called to free the user supplied buffer).
- * @param[in] frame AVFrame containing the raw video data to be encoded.
- *                  May be NULL when flushing an encoder that has the
- *                  CODEC_CAP_DELAY capability set.
- * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
- *                            output packet is non-empty, and to 0 if it is
- *                            empty. If the function returns an error, the
- *                            packet can be assumed to be invalid, and the
- *                            value of got_packet_ptr is undefined and should
- *                            not be used.
- * @return          0 on success, negative error code on failure
- */
-int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
-                          const AVFrame *frame, int *got_packet_ptr);
-
-int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
-                            const AVSubtitle *sub);
-
-/**
- * Close a given AVCodecContext and free all the data associated with it
- * (but not the AVCodecContext itself).
- *
- * Calling this function on an AVCodecContext that hasn't been opened will free
- * the codec-specific data allocated in avcodec_alloc_context3() /
- * avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will
- * do nothing.
- */
-int avcodec_close(AVCodecContext *avctx);
-
-/**
- * Register all the codecs, parsers and bitstream filters which were enabled at
- * configuration time. If you do not call this function you can select exactly
- * which formats you want to support, by using the individual registration
- * functions.
- *
- * @see avcodec_register
- * @see av_register_codec_parser
- * @see av_register_bitstream_filter
- */
-void avcodec_register_all(void);
-
-/**
- * Flush buffers, should be called when seeking or when switching to a different stream.
- */
-void avcodec_flush_buffers(AVCodecContext *avctx);
-
-void avcodec_default_free_buffers(AVCodecContext *s);
-
-/* misc useful functions */
-
-/**
- * Return codec bits per sample.
- *
- * @param[in] codec_id the codec
- * @return Number of bits per sample or zero if unknown for the given codec.
- */
-int av_get_bits_per_sample(enum CodecID codec_id);
-
-/**
- * Return the PCM codec associated with a sample format.
- * @param be  endianness, 0 for little, 1 for big,
- *            -1 (or anything else) for native
- * @return  CODEC_ID_PCM_* or CODEC_ID_NONE
- */
-enum CodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be);
-
-/**
- * Return codec bits per sample.
- * Only return non-zero if the bits per sample is exactly correct, not an
- * approximation.
- *
- * @param[in] codec_id the codec
- * @return Number of bits per sample or zero if unknown for the given codec.
- */
-int av_get_exact_bits_per_sample(enum CodecID codec_id);
-
-/**
- * Return audio frame duration.
- *
- * @param avctx        codec context
- * @param frame_bytes  size of the frame, or 0 if unknown
- * @return             frame duration, in samples, if known. 0 if not able to
- *                     determine.
+ * @defgroup lavc_parsing Frame parsing
+ * @{
  */
-int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes);
 
-/* frame parsing */
 typedef struct AVCodecParserContext {
     void *priv_data;
     struct AVCodecParser *parser;
@@ -4348,6 +3917,576 @@ int av_parser_change(AVCodecParserContext *s,
                      const uint8_t *buf, int buf_size, int keyframe);
 void av_parser_close(AVCodecParserContext *s);
 
+/**
+ * @}
+ * @}
+ */
+
+/**
+ * @addtogroup lavc_encoding
+ * @{
+ */
+
+/**
+ * Find a registered encoder with a matching codec ID.
+ *
+ * @param id CodecID of the requested encoder
+ * @return An encoder if one was found, NULL otherwise.
+ */
+AVCodec *avcodec_find_encoder(enum CodecID 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);
+
+#if FF_API_OLD_ENCODE_AUDIO
+/**
+ * Encode an audio frame from samples into buf.
+ *
+ * @deprecated Use avcodec_encode_audio2 instead.
+ *
+ * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
+ * However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user
+ * will know how much space is needed because it depends on the value passed
+ * in buf_size as described below. In that case a lower value can be used.
+ *
+ * @param avctx the codec context
+ * @param[out] buf the output buffer
+ * @param[in] buf_size the output buffer size
+ * @param[in] samples the input buffer containing the samples
+ * The number of samples read from this buffer is frame_size*channels,
+ * both of which are defined in avctx.
+ * For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of
+ * samples read from samples is equal to:
+ * buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id))
+ * This also implies that av_get_bits_per_sample() must not return 0 for these
+ * codecs.
+ * @return On error a negative value is returned, on success zero or the number
+ * of bytes used to encode the data read from the input buffer.
+ */
+int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx,
+                                              uint8_t *buf, int buf_size,
+                                              const short *samples);
+#endif
+
+/**
+ * Encode a frame of audio.
+ *
+ * Takes input samples from frame and writes the next output packet, if
+ * available, to avpkt. The output packet does not necessarily contain data for
+ * the most recent frame, as encoders can delay, split, and combine input frames
+ * internally as needed.
+ *
+ * @param avctx     codec context
+ * @param avpkt     output AVPacket.
+ *                  The user can supply an output buffer by setting
+ *                  avpkt->data and avpkt->size prior to calling the
+ *                  function, but if the size of the user-provided data is not
+ *                  large enough, encoding will fail. All other AVPacket fields
+ *                  will be reset by the encoder using av_init_packet(). If
+ *                  avpkt->data is NULL, the encoder will allocate it.
+ *                  The encoder will set avpkt->size to the size of the
+ *                  output packet.
+ *
+ *                  If this function fails or produces no output, avpkt will be
+ *                  freed using av_free_packet() (i.e. avpkt->destruct will be
+ *                  called to free the user supplied buffer).
+ * @param[in] frame AVFrame containing the raw audio data to be encoded.
+ *                  May be NULL when flushing an encoder that has the
+ *                  CODEC_CAP_DELAY capability set.
+ *                  There are 2 codec capabilities that affect the allowed
+ *                  values of frame->nb_samples.
+ *                  If CODEC_CAP_SMALL_LAST_FRAME is set, then only the final
+ *                  frame may be smaller than avctx->frame_size, and all other
+ *                  frames must be equal to avctx->frame_size.
+ *                  If CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
+ *                  can have any number of samples.
+ *                  If neither is set, frame->nb_samples must be equal to
+ *                  avctx->frame_size for all frames.
+ * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
+ *                            output packet is non-empty, and to 0 if it is
+ *                            empty. If the function returns an error, the
+ *                            packet can be assumed to be invalid, and the
+ *                            value of got_packet_ptr is undefined and should
+ *                            not be used.
+ * @return          0 on success, negative error code on failure
+ */
+int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt,
+                          const AVFrame *frame, int *got_packet_ptr);
+
+#if FF_API_OLD_ENCODE_VIDEO
+/**
+ * @deprecated use avcodec_encode_video2() instead.
+ *
+ * Encode a video frame from pict into buf.
+ * The input picture should be
+ * stored using a specific format, namely avctx.pix_fmt.
+ *
+ * @param avctx the codec context
+ * @param[out] buf the output buffer for the bitstream of encoded frame
+ * @param[in] buf_size the size of the output buffer in bytes
+ * @param[in] pict the input picture to encode
+ * @return On error a negative value is returned, on success zero or the number
+ * of bytes used from the output buffer.
+ */
+attribute_deprecated
+int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                         const AVFrame *pict);
+#endif
+
+/**
+ * Encode a frame of video.
+ *
+ * Takes input raw video data from frame and writes the next output packet, if
+ * available, to avpkt. The output packet does not necessarily contain data for
+ * the most recent frame, as encoders can delay and reorder input frames
+ * internally as needed.
+ *
+ * @param avctx     codec context
+ * @param avpkt     output AVPacket.
+ *                  The user can supply an output buffer by setting
+ *                  avpkt->data and avpkt->size prior to calling the
+ *                  function, but if the size of the user-provided data is not
+ *                  large enough, encoding will fail. All other AVPacket fields
+ *                  will be reset by the encoder using av_init_packet(). If
+ *                  avpkt->data is NULL, the encoder will allocate it.
+ *                  The encoder will set avpkt->size to the size of the
+ *                  output packet. The returned data (if any) belongs to the
+ *                  caller, he is responsible for freeing it.
+ *
+ *                  If this function fails or produces no output, avpkt will be
+ *                  freed using av_free_packet() (i.e. avpkt->destruct will be
+ *                  called to free the user supplied buffer).
+ * @param[in] frame AVFrame containing the raw video data to be encoded.
+ *                  May be NULL when flushing an encoder that has the
+ *                  CODEC_CAP_DELAY capability set.
+ * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
+ *                            output packet is non-empty, and to 0 if it is
+ *                            empty. If the function returns an error, the
+ *                            packet can be assumed to be invalid, and the
+ *                            value of got_packet_ptr is undefined and should
+ *                            not be used.
+ * @return          0 on success, negative error code on failure
+ */
+int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
+                          const AVFrame *frame, int *got_packet_ptr);
+
+int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                            const AVSubtitle *sub);
+
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavc_resample Audio resampling
+ * @ingroup libavc
+ *
+ * @{
+ */
+struct ReSampleContext;
+struct AVResampleContext;
+
+typedef struct ReSampleContext ReSampleContext;
+
+/**
+ *  Initialize audio resampling context.
+ *
+ * @param output_channels  number of output channels
+ * @param input_channels   number of input channels
+ * @param output_rate      output sample rate
+ * @param input_rate       input sample rate
+ * @param sample_fmt_out   requested output sample format
+ * @param sample_fmt_in    input sample format
+ * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff frequency
+ * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
+ * @param linear           if 1 then the used FIR filter will be linearly interpolated
+                           between the 2 closest, if 0 the closest will be used
+ * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
+ * @return allocated ReSampleContext, NULL if error occurred
+ */
+ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
+                                        int output_rate, int input_rate,
+                                        enum AVSampleFormat sample_fmt_out,
+                                        enum AVSampleFormat sample_fmt_in,
+                                        int filter_length, int log2_phase_count,
+                                        int linear, double cutoff);
+
+int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
+
+/**
+ * Free resample context.
+ *
+ * @param s a non-NULL pointer to a resample context previously
+ *          created with av_audio_resample_init()
+ */
+void audio_resample_close(ReSampleContext *s);
+
+
+/**
+ * Initialize an audio resampler.
+ * Note, if either rate is not an integer then simply scale both rates up so they are.
+ * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
+ * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
+ * @param linear If 1 then the used FIR filter will be linearly interpolated
+                 between the 2 closest, if 0 the closest will be used
+ * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
+ */
+struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
+
+/**
+ * Resample an array of samples using a previously configured context.
+ * @param src an array of unconsumed samples
+ * @param consumed the number of samples of src which have been consumed are returned here
+ * @param src_size the number of unconsumed samples available
+ * @param dst_size the amount of space in samples available in dst
+ * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
+ * @return the number of samples written in dst or -1 if an error occurred
+ */
+int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
+
+
+/**
+ * Compensate samplerate/timestamp drift. The compensation is done by changing
+ * the resampler parameters, so no audible clicks or similar distortions occur
+ * @param compensation_distance distance in output samples over which the compensation should be performed
+ * @param sample_delta number of output samples which should be output less
+ *
+ * example: av_resample_compensate(c, 10, 500)
+ * here instead of 510 samples only 500 samples would be output
+ *
+ * note, due to rounding the actual compensation might be slightly different,
+ * especially if the compensation_distance is large and the in_rate used during init is small
+ */
+void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
+void av_resample_close(struct AVResampleContext *c);
+
+/**
+ * @}
+ */
+
+/**
+ * @addtogroup lavc_picture
+ * @{
+ */
+
+/**
+ * Allocate memory for a picture.  Call avpicture_free() to free it.
+ *
+ * @see avpicture_fill()
+ *
+ * @param picture the picture to be filled in
+ * @param pix_fmt the format of the picture
+ * @param width the width of the picture
+ * @param height the height of the picture
+ * @return zero if successful, a negative value if not
+ */
+int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
+
+/**
+ * Free a picture previously allocated by avpicture_alloc().
+ * The data buffer used by the AVPicture is freed, but the AVPicture structure
+ * itself is not.
+ *
+ * @param picture the AVPicture to be freed
+ */
+void avpicture_free(AVPicture *picture);
+
+/**
+ * Fill in the AVPicture fields.
+ * The fields of the given AVPicture are filled in by using the 'ptr' address
+ * which points to the image data buffer. Depending on the specified picture
+ * format, one or multiple image data pointers and line sizes will be set.
+ * If a planar format is specified, several pointers will be set pointing to
+ * the different picture planes and the line sizes of the different planes
+ * will be stored in the lines_sizes array.
+ * Call with ptr == NULL to get the required size for the ptr buffer.
+ *
+ * To allocate the buffer and fill in the AVPicture fields in one call,
+ * use avpicture_alloc().
+ *
+ * @param picture AVPicture whose fields are to be filled in
+ * @param ptr Buffer which will contain or contains the actual image data
+ * @param pix_fmt The format in which the picture data is stored.
+ * @param width the width of the image in pixels
+ * @param height the height of the image in pixels
+ * @return size of the image data in bytes
+ */
+int avpicture_fill(AVPicture *picture, uint8_t *ptr,
+                   enum PixelFormat pix_fmt, int width, int height);
+
+/**
+ * Copy pixel data from an AVPicture into a buffer.
+ * The data is stored compactly, without any gaps for alignment or padding
+ * which may be applied by avpicture_fill().
+ *
+ * @see avpicture_get_size()
+ *
+ * @param[in] src AVPicture containing image data
+ * @param[in] pix_fmt The format in which the picture data is stored.
+ * @param[in] width the width of the image in pixels.
+ * @param[in] height the height of the image in pixels.
+ * @param[out] dest A buffer into which picture data will be copied.
+ * @param[in] dest_size The size of 'dest'.
+ * @return The number of bytes written to dest, or a negative value (error code) on error.
+ */
+int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
+                     unsigned char *dest, int dest_size);
+
+/**
+ * Calculate the size in bytes that a picture of the given width and height
+ * would occupy if stored in the given picture format.
+ * Note that this returns the size of a compact representation as generated
+ * by avpicture_layout(), which can be smaller than the size required for e.g.
+ * avpicture_fill().
+ *
+ * @param pix_fmt the given picture format
+ * @param width the width of the image
+ * @param height the height of the image
+ * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
+ */
+int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
+
+/**
+ *  deinterlace - if not supported return -1
+ */
+int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
+                          enum PixelFormat pix_fmt, int width, int height);
+/**
+ * Copy image src to dst. Wraps av_picture_data_copy() above.
+ */
+void av_picture_copy(AVPicture *dst, const AVPicture *src,
+                     enum PixelFormat pix_fmt, int width, int height);
+
+/**
+ * Crop image top and left side.
+ */
+int av_picture_crop(AVPicture *dst, const AVPicture *src,
+                    enum PixelFormat pix_fmt, int top_band, int left_band);
+
+/**
+ * Pad image.
+ */
+int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
+            int padtop, int padbottom, int padleft, int padright, int *color);
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavc_misc Utility functions
+ * @ingroup libavc
+ *
+ * Miscellaneous utility functions related to both encoding and decoding
+ * (or neither).
+ * @{
+ */
+
+/**
+ * @defgroup lavc_misc_pixfmt Pixel formats
+ *
+ * Functions for working with pixel formats.
+ * @{
+ */
+
+void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
+
+/**
+ * Return a value representing the fourCC code associated to the
+ * pixel format pix_fmt, or 0 if no associated fourCC code can be
+ * found.
+ */
+unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
+
+#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
+#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
+#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
+#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
+#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
+#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
+
+/**
+ * Compute what kind of losses will occur when converting from one specific
+ * pixel format to another.
+ * 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. These losses can involve loss of chroma, but also loss of
+ * resolution, loss of color depth, loss due to the color space conversion, loss
+ * of the alpha bits or loss due to color quantization.
+ * avcodec_get_fix_fmt_loss() informs you about the various types of losses
+ * which will occur when converting from one pixel format to another.
+ *
+ * @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
+ * (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);
+
+/**
+ * Find the best pixel format to convert to given a certain source pixel
+ * format.  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_fmt() searches which of
+ * the given pixel formats should be used to suffer the least amount of loss.
+ * 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);
+ * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
+ * @endcode
+ *
+ * @param[in] pix_fmt_mask bitmask determining which pixel format 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[out] loss_ptr Combination of flags informing you what kind of losses will occur.
+ * @return The best pixel format to convert to or -1 if none was found.
+ */
+enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
+                              int has_alpha, int *loss_ptr);
+
+/**
+ * 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.
+ */
+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);
+
+enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
+
+/**
+ * @}
+ */
+
+void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
+
+/**
+ * Put a string representing the codec tag codec_tag in buf.
+ *
+ * @param buf_size size in bytes of buf
+ * @return the length of the string that would have been generated if
+ * enough space had been available, excluding the trailing null
+ */
+size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
+
+void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
+
+/**
+ * Return a name for the specified profile, if available.
+ *
+ * @param codec the codec that is searched for the given profile
+ * @param profile the profile value for which a name is requested
+ * @return A name for the profile if found, NULL otherwise.
+ */
+const char *av_get_profile_name(const AVCodec *codec, int profile);
+
+int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
+int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
+//FIXME func typedef
+
+/**
+ * Fill audio frame data and linesize.
+ * AVFrame extended_data channel pointers are allocated if necessary for
+ * planar audio.
+ *
+ * @param frame       the AVFrame
+ *                    frame->nb_samples must be set prior to calling the
+ *                    function. This function fills in frame->data,
+ *                    frame->extended_data, frame->linesize[0].
+ * @param nb_channels channel count
+ * @param sample_fmt  sample format
+ * @param buf         buffer to use for frame data
+ * @param buf_size    size of buffer
+ * @param align       plane size sample alignment (0 = default)
+ * @return            0 on success, negative error code on failure
+ */
+int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
+                             enum AVSampleFormat sample_fmt, const uint8_t *buf,
+                             int buf_size, int align);
+
+/**
+ * Flush buffers, should be called when seeking or when switching to a different stream.
+ */
+void avcodec_flush_buffers(AVCodecContext *avctx);
+
+void avcodec_default_free_buffers(AVCodecContext *s);
+
+/**
+ * Return codec bits per sample.
+ *
+ * @param[in] codec_id the codec
+ * @return Number of bits per sample or zero if unknown for the given codec.
+ */
+int av_get_bits_per_sample(enum CodecID codec_id);
+
+/**
+ * Return the PCM codec associated with a sample format.
+ * @param be  endianness, 0 for little, 1 for big,
+ *            -1 (or anything else) for native
+ * @return  CODEC_ID_PCM_* or CODEC_ID_NONE
+ */
+enum CodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be);
+
+/**
+ * Return codec bits per sample.
+ * Only return non-zero if the bits per sample is exactly correct, not an
+ * approximation.
+ *
+ * @param[in] codec_id the codec
+ * @return Number of bits per sample or zero if unknown for the given codec.
+ */
+int av_get_exact_bits_per_sample(enum CodecID codec_id);
+
+/**
+ * Return audio frame duration.
+ *
+ * @param avctx        codec context
+ * @param frame_bytes  size of the frame, or 0 if unknown
+ * @return             frame duration, in samples, if known. 0 if not able to
+ *                     determine.
+ */
+int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes);
+
 
 typedef struct AVBitStreamFilterContext {
     void *priv_data;
@@ -4411,24 +4550,6 @@ void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
 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.
- */
-void av_picture_copy(AVPicture *dst, const AVPicture *src,
-                     enum PixelFormat pix_fmt, int width, int height);
-
-/**
- * Crop image top and left side.
- */
-int av_picture_crop(AVPicture *dst, const AVPicture *src,
-                    enum PixelFormat pix_fmt, int top_band, int left_band);
-
-/**
- * Pad image.
- */
-int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
-            int padtop, int padbottom, int padleft, int padright, int *color);
-
-/**
  * Encode extradata length to a buffer. Used by xiph codecs.
  *
  * @param s buffer to write to; must be at least (v/255+1) bytes long
@@ -4505,20 +4626,10 @@ int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
 enum AVMediaType avcodec_get_type(enum CodecID codec_id);
 
 /**
- * Get the AVClass for AVCodecContext. It can be used in combination with
- * AV_OPT_SEARCH_FAKE_OBJ for examining options.
- *
- * @see av_opt_find().
- */
-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().
+ * Get the name of a codec.
+ * @return  a static string identifying the codec; never NULL
  */
-const AVClass *avcodec_get_frame_class(void);
+const char *avcodec_get_name(enum CodecID id);
 
 /**
  * @return a positive value if s is open (i.e. avcodec_open2() was called on it
@@ -4536,4 +4647,8 @@ int av_codec_is_encoder(AVCodec *codec);
  */
 int av_codec_is_decoder(AVCodec *codec);
 
+/**
+ * @}
+ */
+
 #endif /* AVCODEC_AVCODEC_H */