#define AVCODEC_AVCODEC_H
/**
- * @file libavcodec/avcodec.h
+ * @file
* external API header
*/
#include "libavutil/avutil.h"
#define LIBAVCODEC_VERSION_MAJOR 52
-#define LIBAVCODEC_VERSION_MINOR 45
-#define LIBAVCODEC_VERSION_MICRO 0
+#define LIBAVCODEC_VERSION_MINOR 78
+#define LIBAVCODEC_VERSION_MICRO 1
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
/**
- * Identifies the syntax and semantics of the bitstream.
+ * Identify the syntax and semantics of the bitstream.
* The principle is roughly:
* Two decoders with the same ID can decode the same streams.
* Two encoders with the same ID can encode compatible streams.
CODEC_ID_QDRAW,
CODEC_ID_VIXL,
CODEC_ID_QPEG,
+#if LIBAVCODEC_VERSION_MAJOR < 53
CODEC_ID_XVID,
+#endif
CODEC_ID_PNG,
CODEC_ID_PPM,
CODEC_ID_PBM,
CODEC_ID_FLASHSV2,
CODEC_ID_CDGRAPHICS,
CODEC_ID_R210,
+ CODEC_ID_ANM,
+ CODEC_ID_BINKVIDEO,
+ CODEC_ID_IFF_ILBM,
+ CODEC_ID_IFF_BYTERUN1,
+ CODEC_ID_KGV1,
+ CODEC_ID_YOP,
+ CODEC_ID_VP8,
+ CODEC_ID_PICTOR,
/* various PCM "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
CODEC_ID_TRUEHD,
CODEC_ID_MP4ALS,
CODEC_ID_ATRAC1,
+ CODEC_ID_BINKAUDIO_RDFT,
+ CODEC_ID_BINKAUDIO_DCT,
/* subtitle codecs */
CODEC_ID_DVD_SUBTITLE= 0x17000,
* stream (only used by libavformat) */
};
-enum CodecType {
- CODEC_TYPE_UNKNOWN = -1,
- CODEC_TYPE_VIDEO,
- CODEC_TYPE_AUDIO,
- CODEC_TYPE_DATA,
- CODEC_TYPE_SUBTITLE,
- CODEC_TYPE_ATTACHMENT,
- CODEC_TYPE_NB
-};
+#if LIBAVCODEC_VERSION_MAJOR < 53
+#define CodecType AVMediaType
+
+#define CODEC_TYPE_UNKNOWN AVMEDIA_TYPE_UNKNOWN
+#define CODEC_TYPE_VIDEO AVMEDIA_TYPE_VIDEO
+#define CODEC_TYPE_AUDIO AVMEDIA_TYPE_AUDIO
+#define CODEC_TYPE_DATA AVMEDIA_TYPE_DATA
+#define CODEC_TYPE_SUBTITLE AVMEDIA_TYPE_SUBTITLE
+#define CODEC_TYPE_ATTACHMENT AVMEDIA_TYPE_ATTACHMENT
+#define CODEC_TYPE_NB AVMEDIA_TYPE_NB
+#endif
/**
* all in native-endian format
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
#define CODEC_FLAG2_MBTREE 0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
+#define CODEC_FLAG2_PSY 0x00080000 ///< Use psycho visual optimizations.
+#define CODEC_FLAG2_SSIM 0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
+#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
/* Unsupported options :
* Syntax Arithmetic coding (SAC)
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
/**
- * Codec uses get_buffer() for allocating buffers.
- * direct rendering method 1
+ * Codec uses get_buffer() for allocating buffers and supports custom allocators.
+ * If not set, it might not use get_buffer() at all or use operations that
+ * assume the buffer was allocated by avcodec_default_get_buffer.
*/
#define CODEC_CAP_DR1 0x0002
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
#define CODEC_CAP_HWACCEL_VDPAU 0x0080
/**
* Codec can output multiple frames per AVPacket
+ * Normally demuxers return one frame at a time, demuxers which do not do
+ * are connected to a parser to split what they return into proper frames.
+ * This flag is reserved to the very rare category of codecs which have a
+ * bitstream that cannot be split into frames without timeconsuming
+ * operations like full decoding. Demuxers carring such bitstreams thus
+ * may return multiple frames in a packet. This has many disadvantages like
+ * prohibiting stream copy in many cases thus it should only be considered
+ * as a last resort.
*/
#define CODEC_CAP_SUBFRAMES 0x0100
+/**
+ * Codec is experimental and is thus avoided in favor of non experimental
+ * encoders
+ */
+#define CODEC_CAP_EXPERIMENTAL 0x0200
//The following defines may change, don't expect compatibility if you use them.
#define MB_TYPE_INTRA4x4 0x0001
short *dct_coeff;\
\
/**\
- * motion referece frame index\
+ * motion reference frame index\
+ * the order in which these are stored can depend on the codec.\
* - encoding: Set by user.\
* - decoding: Set by libavcodec.\
*/\
#define FF_QSCALE_TYPE_MPEG1 0
#define FF_QSCALE_TYPE_MPEG2 1
#define FF_QSCALE_TYPE_H264 2
+#define FF_QSCALE_TYPE_VP56 3
#define FF_BUFFER_TYPE_INTERNAL 1
#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
/**
* Pixel format, see PIX_FMT_xxx.
+ * May be set by the demuxer if known from headers.
+ * May be overriden by the decoder if it knows better.
* - encoding: Set by user.
- * - decoding: Set by libavcodec.
+ * - decoding: Set by user if known, overridden by libavcodec if known
*/
enum PixelFormat pix_fmt;
void *opaque;
char codec_name[32];
- enum CodecType codec_type; /* see CODEC_TYPE_xxx */
+ enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
enum CodecID codec_id; /* see CODEC_ID_xxx */
/**
#define FF_BUG_HPEL_CHROMA 2048
#define FF_BUG_DC_CLIP 4096
#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
+#define FF_BUG_TRUNCATED 16384
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
/**
* - encoding: Set by user.
* - decoding: Set by user.
* Setting this to STRICT or higher means the encoder and decoder will
- * generally do stupid things. While setting it to inofficial or lower
- * will mean the encoder might use things that are not supported by all
- * spec compliant decoders. Decoders make no difference between normal,
- * inofficial and experimental, that is they always try to decode things
- * when they can unless they are explicitly asked to behave stupid
+ * generally do stupid things, whereas setting it to inofficial or lower
+ * will mean the encoder might produce output that is not supported by all
+ * spec-compliant decoders. Decoders don't differentiate between normal,
+ * inofficial and experimental (that is, they always try to decode things
+ * when they can) unless they are explicitly asked to behave stupidly
* (=strictly conform to the specs)
*/
int strict_std_compliance;
-#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to a older more strict version of the spec or reference software.
+#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
#define FF_COMPLIANCE_NORMAL 0
#define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions.
/**
* Called at the beginning of each frame to get a buffer for it.
* If pic.reference is set then the frame will be read later by libavcodec.
- * avcodec_align_dimensions() should be used to find the required width and
+ * avcodec_align_dimensions2() should be used to find the required width and
* height, as they normally need to be rounded up to the next multiple of 16.
* if CODEC_CAP_DR1 is not set then get_buffer() must call
* avcodec_default_get_buffer() instead of providing buffers allocated by
#define FF_IDCT_EA 21
#define FF_IDCT_SIMPLENEON 22
#define FF_IDCT_SIMPLEALPHA 23
+#define FF_IDCT_BINK 24
/**
* slice count
*/
int profile;
#define FF_PROFILE_UNKNOWN -99
+
#define FF_PROFILE_AAC_MAIN 0
#define FF_PROFILE_AAC_LOW 1
#define FF_PROFILE_AAC_SSR 2
#define FF_PROFILE_AAC_LTP 3
+#define FF_PROFILE_H264_BASELINE 66
+#define FF_PROFILE_H264_MAIN 77
+#define FF_PROFILE_H264_EXTENDED 88
+#define FF_PROFILE_H264_HIGH 100
+#define FF_PROFILE_H264_HIGH_10 110
+#define FF_PROFILE_H264_HIGH_422 122
+#define FF_PROFILE_H264_HIGH_444 244
+#define FF_PROFILE_H264_CAVLC_444 44
+
/**
* level
* - encoding: Set by user.
* - decoding: unused
*/
int weighted_p_pred;
+
+ /**
+ * AQ mode
+ * 0: Disabled
+ * 1: Variance AQ (complexity mask)
+ * 2: Auto-variance AQ (experimental)
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ int aq_mode;
+
+ /**
+ * AQ strength
+ * Reduces blocking and blurring in flat and textured areas.
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ float aq_strength;
+
+ /**
+ * PSY RD
+ * Strength of psychovisual optimization
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ float psy_rd;
+
+ /**
+ * PSY trellis
+ * Strength of psychovisual optimization
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ float psy_trellis;
+
+ /**
+ * RC lookahead
+ * Number of frames for frametype and ratecontrol lookahead
+ * - encoding: Set by user
+ * - decoding: unused
+ */
+ int rc_lookahead;
+
+ /**
+ * Constant rate factor maximum
+ * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
+ * than crf_max, even if doing so would violate VBV restrictions.
+ * - encoding: Set by user.
+ * - decoding: unused
+ */
+ float crf_max;
+
+ int log_level_offset;
} AVCodecContext;
/**
* This is the primary way to find a codec from the user perspective.
*/
const char *name;
- enum CodecType type;
+ enum AVMediaType type;
enum CodecID id;
int priv_data_size;
int (*init)(AVCodecContext *);
/**
* Type of codec implemented by the hardware accelerator.
*
- * See CODEC_TYPE_xxx
+ * See AVMEDIA_TYPE_xxx
*/
- enum CodecType type;
+ enum AVMediaType type;
/**
* Codec implemented by the hardware accelerator.
int output_rate, int input_rate);
#endif
/**
- * Initializes audio resampling context
+ * Initialize audio resampling context
*
* @param output_channels number of output channels
* @param input_channels number of input channels
/**
- * Initializes an audio resampler.
+ * 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
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
/**
- * resamples.
+ * 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
/**
- * Compensates samplerate/timestamp drift. The compensation is done by changing
+ * 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
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
+#if LIBAVCODEC_VERSION_MAJOR < 53
/**
- * Returns the pixel format corresponding to the name name.
+ * Return the pixel format corresponding to the name name.
*
- * If there is no pixel format with name name, then looks for a
+ * If there is no pixel format with name name, then look for a
* pixel format with the name corresponding to the native endian
* format of name.
- * For example in a little-endian system, first looks for "gray16",
+ * For example in a little-endian system, first look for "gray16",
* then for "gray16le".
*
- * Finally if no pixel format has been found, returns PIX_FMT_NONE.
+ * Finally if no pixel format has been found, return PIX_FMT_NONE.
+ *
+ * @deprecated Deprecated in favor of av_get_pix_fmt().
+ */
+attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
+#endif
+
+/**
+ * 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);
+
+/**
+ * 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
*/
-enum PixelFormat avcodec_get_pix_fmt(const char* name);
-unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
+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_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
/**
- * Computes what kind of losses will occur when converting from one specific
+ * 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
int has_alpha);
/**
- * Finds the best pixel format to convert to given a certain source pixel
+ * 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
AVCodec *av_codec_next(AVCodec *c);
/**
- * Returns the LIBAVCODEC_VERSION_INT constant.
+ * Return the LIBAVCODEC_VERSION_INT constant.
*/
unsigned avcodec_version(void);
/**
- * Returns the libavcodec build-time configuration.
+ * Return the libavcodec build-time configuration.
*/
const char *avcodec_configuration(void);
/**
- * Returns the libavcodec license.
+ * Return the libavcodec license.
*/
const char *avcodec_license(void);
/**
- * Initializes libavcodec.
+ * Initialize libavcodec.
*
* @warning This function must be called before any other libavcodec
* function.
void avcodec_register(AVCodec *codec);
/**
- * Finds a registered encoder with a matching codec ID.
+ * 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);
/**
- * Finds a registered encoder with the specified name.
+ * 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);
/**
- * Finds a registered decoder with a matching codec ID.
+ * Find a registered decoder with a matching codec ID.
*
* @param id CodecID of the requested decoder
* @return A decoder if one was found, NULL otherwise.
AVCodec *avcodec_find_decoder(enum CodecID id);
/**
- * Finds a registered decoder with the specified name.
+ * Find a registered decoder with the specified name.
*
* @param name name of the requested decoder
* @return A decoder if one was found, NULL otherwise.
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
/**
- * Sets the fields of the given AVCodecContext to default values.
+ * Set the fields of the given AVCodecContext to default values.
*
* @param s The AVCodecContext of which the fields should be set to default values.
*/
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
* we WILL change its arguments and name a few times! */
-void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
+void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
/**
- * Allocates an AVCodecContext and sets its fields to default values. The
+ * 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.
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
* we WILL change its arguments and name a few times! */
-AVCodecContext *avcodec_alloc_context2(enum CodecType);
+AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
/**
- * Sets the fields of the given AVFrame to default values.
+ * 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_open() before you
+ * can use this AVCodecContext to decode/encode video/audio data.
+ *
+ * @param dest target codec context, should be initialized with
+ * avcodec_alloc_context(), but otherwise uninitialized
+ * @param src source codec context
+ * @return AVERROR() on error (e.g. memory allocation error), 0 on success
+ */
+int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
+
+/**
+ * Set the fields of the given AVFrame to default values.
*
* @param pic The AVFrame of which the fields should be set to default values.
*/
void avcodec_get_frame_defaults(AVFrame *pic);
/**
- * Allocates an AVFrame and sets its fields to default values. The resulting
+ * Allocate an AVFrame and set its fields to default values. The resulting
* struct can be deallocated by simply calling av_free().
*
* @return An AVFrame filled with default values or NULL on failure.
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
+
+/**
+ * Return the amount of padding in pixels which the get_buffer callback must
+ * provide around the edge of the image for codecs which do not have the
+ * CODEC_FLAG_EMU_EDGE flag.
+ *
+ * @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
+ * padding.
+ *
+ * May only be used if a codec with CODEC_CAP_DR1 has been opened.
+ * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
+ * 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
+ * line sizes are a multiple of the respective linesize_align[i].
+ *
+ * May only be used if a codec with CODEC_CAP_DR1 has been opened.
+ * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
+ * according to avcodec_get_edge_width() before.
+ */
+void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
+ int linesize_align[4]);
/**
- * Checks if the given dimension of a picture is valid, meaning that all
+ * Check if the given dimension of a picture is valid, meaning that all
* bytes of the picture can be addressed with a signed int.
*
* @param[in] w Width of the picture.
int avcodec_thread_init(AVCodecContext *s, int thread_count);
void avcodec_thread_free(AVCodecContext *s);
-int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
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
/**
- * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
+ * 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(),
#if LIBAVCODEC_VERSION_MAJOR < 53
/**
- * Decodes an audio frame from buf into samples.
+ * Decode an audio frame from buf into samples.
* Wrapper function which calls avcodec_decode_audio3.
*
* @deprecated Use avcodec_decode_audio3 instead.
#endif
/**
- * Decodes the audio frame of size avpkt->size from avpkt->data into samples.
+ * Decode the audio frame of size avpkt->size from avpkt->data into samples.
* Some decoders may support multiple frames in a single AVPacket, such
* decoders would then just decode the first frame. In this case,
* avcodec_decode_audio3 has to be called again with an AVPacket that contains
#if LIBAVCODEC_VERSION_MAJOR < 53
/**
- * Decodes a video frame from buf into picture.
+ * Decode a video frame from buf into picture.
* Wrapper function which calls avcodec_decode_video2.
*
* @deprecated Use avcodec_decode_video2 instead.
#endif
/**
- * Decodes the video frame of size avpkt->size from avpkt->data into picture.
+ * Decode the video frame of size avpkt->size from avpkt->data into picture.
* Some decoders may support multiple frames in a single AVPacket, such
* decoders would then just decode the first frame.
*
*
* @param avctx the codec context
* @param[out] picture The AVFrame in which the decoded video frame will be stored.
+ * Use avcodec_alloc_frame to get an AVFrame, the codec will
+ * allocate memory for the actual bitmap.
+ * with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
+ * with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
+ * decodes and the decoder tells the user once it does not need the data anymore,
+ * the user app can at this point free/reuse/keep the memory as it sees fit.
+ *
* @param[in] avpkt The input AVpacket containing the input buffer.
* You can create such packet with av_init_packet() and by then setting
* data and size, some decoders might in addition need other fields like
- * flags&PKT_FLAG_KEY. All decoders are designed to use the least
+ * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
* fields possible.
* @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
* @return On error a negative value is returned, otherwise the number of bytes
#endif
/**
- * Decodes a subtitle message.
- * Returns a negative value on error, otherwise returns the number of bytes used.
+ * Decode a subtitle message.
+ * Return a negative value on error, otherwise return the number of bytes used.
* If no subtitle could be decompressed, got_sub_ptr is zero.
* Otherwise, the subtitle is stored in *sub.
*
uint8_t *buf, int buf_size);
/**
- * Encodes an audio frame from samples into buf.
+ * Encode an audio frame from samples into buf.
*
* @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
* However, for PCM audio the user will know how much space is needed
const short *samples);
/**
- * Encodes a video frame from pict into buf.
+ * Encode a video frame from pict into buf.
* The input picture should be
* stored using a specific format, namely avctx.pix_fmt.
*
/* misc useful functions */
/**
- * Returns a single letter to describe the given picture type pict_type.
+ * Return a single letter to describe the given picture type pict_type.
*
* @param[in] pict_type the picture type
* @return A single character representing the picture type.
char av_get_pict_type_char(int pict_type);
/**
- * Returns codec bits per sample.
+ * 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);
/**
- * Returns sample format bits per sample.
+ * Return sample format bits per sample.
*
* @param[in] sample_fmt the sample format
* @return Number of bits per sample or zero if unknown for the given sample format.
int flags;
#define PARSER_FLAG_COMPLETE_FRAMES 0x0001
+#define PARSER_FLAG_ONCE 0x0002
int64_t offset; ///< byte offset from starting packet start
int64_t cur_frame_end[AV_PARSER_PTS_NB];
/* memory */
/**
- * Reallocates the given block if it is not large enough, otherwise it
- * does nothing.
+ * Reallocate the given block if it is not large enough, otherwise do nothing.
*
* @see av_realloc
*/
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
/**
- * Allocates a buffer, reusing the given one if large enough.
+ * Allocate a buffer, reusing the given one if large enough.
*
* Contrary to av_fast_realloc the current buffer contents might not be
* preserved and on error the old buffer is freed, thus no special
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
+ * @param v size of extradata in bytes
+ * @return number of bytes written to the buffer.
+ */
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
/**
- * Parses str and put in width_ptr and height_ptr the detected values.
+ * Parse str and put in width_ptr and height_ptr the detected values.
*
* @return 0 in case of a successful parsing, a negative value otherwise
* @param[in] str the string to parse: it has to be a string in the format
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
/**
- * Parses str and put in frame_rate the detected values.
+ * Parse str and store the detected values in *frame_rate.
*
* @return 0 in case of a successful parsing, a negative value otherwise
* @param[in] str the string to parse: it has to be a string in the format
*/
int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
-/* error handling */
-#if EINVAL > 0
-#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
-#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
-#else
-/* Some platforms have E* and errno already negated. */
-#define AVERROR(e) (e)
-#define AVUNERROR(e) (e)
-#endif
-#define AVERROR_UNKNOWN AVERROR(EINVAL) /**< unknown error */
-#define AVERROR_IO AVERROR(EIO) /**< I/O error */
-#define AVERROR_NUMEXPECTED AVERROR(EDOM) /**< Number syntax expected in filename. */
-#define AVERROR_INVALIDDATA AVERROR(EINVAL) /**< invalid data found */
-#define AVERROR_NOMEM AVERROR(ENOMEM) /**< not enough memory */
-#define AVERROR_NOFMT AVERROR(EILSEQ) /**< unknown format */
-#define AVERROR_NOTSUPP AVERROR(ENOSYS) /**< Operation not supported. */
-#define AVERROR_NOENT AVERROR(ENOENT) /**< No such file or directory. */
-#define AVERROR_EOF AVERROR(EPIPE) /**< End of file. */
-#define AVERROR_PATCHWELCOME -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
-
/**
* Logs a generic warning message about a missing feature. This function is
* intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
void av_log_missing_feature(void *avc, const char *feature, int want_sample);
/**
- * Logs a generic warning message asking for a sample. This function is
+ * Log a generic warning message asking for a sample. This function is
* 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
void av_log_ask_for_sample(void *avc, const char *msg);
/**
- * Registers the hardware accelerator hwaccel.
+ * Register the hardware accelerator hwaccel.
*/
void av_register_hwaccel(AVHWAccel *hwaccel);
projects / ffmpeg / blobdiff