/*
* copyright (c) 2001 Fabrice Bellard
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avutil.h"
#include "libavutil/buffer.h"
#include "libavutil/cpu.h"
+#include "libavutil/channel_layout.h"
#include "libavutil/dict.h"
#include "libavutil/frame.h"
#include "libavutil/log.h"
*
* If you add a codec ID to this list, add it so that
* 1. no value of a existing codec ID changes (that would break ABI),
- * 2. it is as close as possible to similar codecs.
+ * 2. Give it a value which when taken as ASCII is recognized uniquely by a human as this specific codec.
+ * This ensures that 2 forks can independently add AVCodecIDs without producing conflicts.
*
* After adding new codec IDs, do not forget to add an entry to the codec
* descriptor list and bump libavcodec minor version.
AV_CODEC_ID_MSS2,
AV_CODEC_ID_VP9,
AV_CODEC_ID_AIC,
- AV_CODEC_ID_ESCAPE130,
+ AV_CODEC_ID_ESCAPE130_DEPRECATED,
+
+ AV_CODEC_ID_BRENDER_PIX= MKBETAG('B','P','I','X'),
+ AV_CODEC_ID_Y41P = MKBETAG('Y','4','1','P'),
+ AV_CODEC_ID_ESCAPE130 = MKBETAG('E','1','3','0'),
+ AV_CODEC_ID_EXR = MKBETAG('0','E','X','R'),
+ AV_CODEC_ID_AVRP = MKBETAG('A','V','R','P'),
+
+ AV_CODEC_ID_012V = MKBETAG('0','1','2','V'),
+ AV_CODEC_ID_G2M = MKBETAG( 0 ,'G','2','M'),
+ AV_CODEC_ID_AVUI = MKBETAG('A','V','U','I'),
+ AV_CODEC_ID_AYUV = MKBETAG('A','Y','U','V'),
+ AV_CODEC_ID_TARGA_Y216 = MKBETAG('T','2','1','6'),
+ AV_CODEC_ID_V308 = MKBETAG('V','3','0','8'),
+ AV_CODEC_ID_V408 = MKBETAG('V','4','0','8'),
+ AV_CODEC_ID_YUV4 = MKBETAG('Y','U','V','4'),
+ AV_CODEC_ID_SANM = MKBETAG('S','A','N','M'),
+ AV_CODEC_ID_PAF_VIDEO = MKBETAG('P','A','F','V'),
+ AV_CODEC_ID_AVRN = MKBETAG('A','V','R','n'),
+ AV_CODEC_ID_CPIA = MKBETAG('C','P','I','A'),
+ AV_CODEC_ID_XFACE = MKBETAG('X','F','A','C'),
+ AV_CODEC_ID_SGIRLE = MKBETAG('S','G','I','R'),
+ AV_CODEC_ID_MVC1 = MKBETAG('M','V','C','1'),
+ AV_CODEC_ID_MVC2 = MKBETAG('M','V','C','2'),
+ AV_CODEC_ID_SNOW = MKBETAG('S','N','O','W'),
+ AV_CODEC_ID_WEBP = MKBETAG('W','E','B','P'),
+ AV_CODEC_ID_SMVJPEG = MKBETAG('S','M','V','J'),
/* various PCM "codecs" */
AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
AV_CODEC_ID_PCM_LXF,
AV_CODEC_ID_S302M,
AV_CODEC_ID_PCM_S8_PLANAR,
+ AV_CODEC_ID_PCM_S24LE_PLANAR = MKBETAG(24,'P','S','P'),
+ AV_CODEC_ID_PCM_S32LE_PLANAR = MKBETAG(32,'P','S','P'),
+ AV_CODEC_ID_PCM_S16BE_PLANAR = MKBETAG('P','S','P',16),
/* various ADPCM codecs */
AV_CODEC_ID_ADPCM_IMA_QT = 0x11000,
AV_CODEC_ID_ADPCM_IMA_ISS,
AV_CODEC_ID_ADPCM_G722,
AV_CODEC_ID_ADPCM_IMA_APC,
+ AV_CODEC_ID_VIMA = MKBETAG('V','I','M','A'),
+ AV_CODEC_ID_ADPCM_AFC = MKBETAG('A','F','C',' '),
+ AV_CODEC_ID_ADPCM_IMA_OKI = MKBETAG('O','K','I',' '),
+ AV_CODEC_ID_ADPCM_DTK = MKBETAG('D','T','K',' '),
+ AV_CODEC_ID_ADPCM_IMA_RAD = MKBETAG('R','A','D',' '),
/* AMR */
AV_CODEC_ID_AMR_NB = 0x12000,
AV_CODEC_ID_RALF,
AV_CODEC_ID_IAC,
AV_CODEC_ID_ILBC,
- AV_CODEC_ID_OPUS,
+ AV_CODEC_ID_OPUS_DEPRECATED,
AV_CODEC_ID_COMFORT_NOISE,
- AV_CODEC_ID_TAK,
+ AV_CODEC_ID_TAK_DEPRECATED,
+ AV_CODEC_ID_FFWAVESYNTH = MKBETAG('F','F','W','S'),
+ AV_CODEC_ID_SONIC = MKBETAG('S','O','N','C'),
+ AV_CODEC_ID_SONIC_LS = MKBETAG('S','O','N','L'),
+ AV_CODEC_ID_PAF_AUDIO = MKBETAG('P','A','F','A'),
+ AV_CODEC_ID_OPUS = MKBETAG('O','P','U','S'),
+ AV_CODEC_ID_TAK = MKBETAG('t','B','a','K'),
+ AV_CODEC_ID_EVRC = MKBETAG('s','e','v','c'),
+ AV_CODEC_ID_SMV = MKBETAG('s','s','m','v'),
/* subtitle codecs */
AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
AV_CODEC_ID_HDMV_PGS_SUBTITLE,
AV_CODEC_ID_DVB_TELETEXT,
AV_CODEC_ID_SRT,
+ AV_CODEC_ID_MICRODVD = MKBETAG('m','D','V','D'),
+ AV_CODEC_ID_EIA_608 = MKBETAG('c','6','0','8'),
+ AV_CODEC_ID_JACOSUB = MKBETAG('J','S','U','B'),
+ AV_CODEC_ID_SAMI = MKBETAG('S','A','M','I'),
+ AV_CODEC_ID_REALTEXT = MKBETAG('R','T','X','T'),
+ AV_CODEC_ID_SUBVIEWER1 = MKBETAG('S','b','V','1'),
+ AV_CODEC_ID_SUBVIEWER = MKBETAG('S','u','b','V'),
+ AV_CODEC_ID_SUBRIP = MKBETAG('S','R','i','p'),
+ AV_CODEC_ID_WEBVTT = MKBETAG('W','V','T','T'),
+ AV_CODEC_ID_MPL2 = MKBETAG('M','P','L','2'),
+ AV_CODEC_ID_VPLAYER = MKBETAG('V','P','l','r'),
+ AV_CODEC_ID_PJS = MKBETAG('P','h','J','S'),
+ AV_CODEC_ID_ASS = MKBETAG('A','S','S',' '), ///< ASS as defined in Matroska
/* other specific kind of codecs (generally used for attachments) */
AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
AV_CODEC_ID_TTF = 0x18000,
+ AV_CODEC_ID_BINTEXT = MKBETAG('B','T','X','T'),
+ AV_CODEC_ID_XBIN = MKBETAG('X','B','I','N'),
+ AV_CODEC_ID_IDF = MKBETAG( 0 ,'I','D','F'),
+ AV_CODEC_ID_OTF = MKBETAG( 0 ,'O','T','F'),
+ AV_CODEC_ID_SMPTE_KLV = MKBETAG('K','L','V','A'),
+ AV_CODEC_ID_DVD_NAV = MKBETAG('D','N','A','V'),
+
AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
* stream (only used by libavformat) */
AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information.
+
+#if FF_API_CODEC_ID
+#include "old_codec_ids.h"
+#endif
};
/**
* Codec supports lossless compression. Audio and video codecs only.
*/
#define AV_CODEC_PROP_LOSSLESS (1 << 2)
+/**
+ * Subtitle codec is bitmap based
+ * Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field.
+ */
+#define AV_CODEC_PROP_BITMAP_SUB (1 << 16)
+/**
+ * Subtitle codec is text based.
+ * Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field.
+ */
+#define AV_CODEC_PROP_TEXT_SUB (1 << 17)
/**
* @ingroup lavc_decoding
* Note: If the first 23 bits of the additional bytes are not 0, then damaged
* MPEG bitstreams could cause overread and segfault.
*/
-#define FF_INPUT_BUFFER_PADDING_SIZE 8
+#define FF_INPUT_BUFFER_PADDING_SIZE 16
/**
* @ingroup lavc_encoding
ME_HEX, ///< hexagon based search
ME_UMH, ///< uneven multi-hexagon search
ME_TESA, ///< transformed exhaustive search algorithm
+ ME_ITER=50, ///< iterative search
};
/**
AVCOL_SPC_YCOCG = 8, ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
AVCOL_SPC_NB , ///< Not part of ABI
};
+#define AVCOL_SPC_YCGCO AVCOL_SPC_YCOCG
enum AVColorRange{
AVCOL_RANGE_UNSPECIFIED = 0,
#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
+#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format. DEPRECATED!!!!
#define CODEC_FLAG2_IGNORE_CROP 0x00010000 ///< Discard cropping information from SPS.
#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
+#define CODEC_FLAG2_SHOW_ALL 0x00400000 ///< Show all frames before the first keyframe
/* Unsupported options :
* Syntax Arithmetic coding (SAC)
* Codec should fill in channel configuration and samplerate instead of container
*/
#define CODEC_CAP_CHANNEL_CONF 0x0400
+
/**
* Codec is able to deal with negative linesizes
*/
#define CODEC_CAP_NEG_LINESIZES 0x0800
+
/**
* Codec supports frame-level multithreading.
*/
* Audio encoder supports receiving a different number of samples in each call.
*/
#define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000
+/**
+ * Codec is intra only.
+ */
+#define CODEC_CAP_INTRA_ONLY 0x40000000
+/**
+ * Codec is lossless.
+ */
+#define CODEC_CAP_LOSSLESS 0x80000000
//The following defines may change, don't expect compatibility if you use them.
#define MB_TYPE_INTRA4x4 0x0001
* @endcode
*/
AV_PKT_DATA_H263_MB_INFO,
+
+ /**
+ * Recommmends skipping the specified number of samples
+ * @code
+ * u32le number of samples to skip from start of this packet
+ * u32le number of samples to skip from end of this packet
+ * u8 reason for start skip
+ * u8 reason for end skip (0=padding silence, 1=convergence)
+ * @endcode
+ */
+ AV_PKT_DATA_SKIP_SAMPLES=70,
+
+ /**
+ * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that
+ * the packet may contain "dual mono" audio specific to Japanese DTV
+ * and if it is true, recommends only the selected channel to be used.
+ * @code
+ * u8 selected channels (0=mail/left, 1=sub/right, 2=both)
+ * @endcode
+ */
+ AV_PKT_DATA_JP_DUALMONO,
+
+ /**
+ * A list of zero terminated key/value strings. There is no end marker for
+ * the list, so it is required to rely on the side data size to stop.
+ */
+ AV_PKT_DATA_STRINGS_METADATA,
+
+ /**
+ * Subtitle event position
+ * @code
+ * u32le x1
+ * u32le y1
+ * u32le x2
+ * u32le y2
+ * @endcode
+ */
+ AV_PKT_DATA_SUBTITLE_POSITION,
+
+ /**
+ * Data found in BlockAdditional element of matroska container. There is
+ * no end marker for the data, so it is required to rely on the side data
+ * size to recognize the end. 8 byte id (as found in BlockAddId) followed
+ * by data.
+ */
+ AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
};
/**
* For video, it should typically contain one compressed frame. For audio it may
* contain several compressed frames.
*
- * AVPacket is one of the few structs in Libav, whose size is a part of public
+ * AVPacket is one of the few structs in FFmpeg, whose size is a part of public
* ABI. Thus it may be allocated on stack and no new fields can be added to it
* without libavcodec and libavformat major bump.
*
* New fields can be added to the end with minor version bumps.
* Removal, reordering and changes to existing fields require a major
* version bump.
+ * Please use AVOptions (av_opt* / av_set/get*()) to access these fields from user
+ * applications.
* sizeof(AVCodecContext) must not be used outside libav*.
*/
typedef struct AVCodecContext {
/**
* Codec delay.
*
+ * Encoding: Number of frames delay there will be from the encoder input to
+ * the decoder output. (we assume the decoder matches the spec)
+ * Decoding: Number of frames delay in addition to what a standard decoder
+ * as specified in the spec would produce.
+ *
* Video:
* Number of frames the decoded output will be delayed relative to the
* encoded input.
/**
* Bitstream width / height, may be different from width/height e.g. when
- * the decoded frame is cropped before being output.
+ * the decoded frame is cropped before being output or lowres is enabled.
* - encoding: unused
* - decoding: May be set by the user before opening the decoder if known
* e.g. from the container. During decoding, the decoder may
/**
* Pixel format, see AV_PIX_FMT_xxx.
* May be set by the demuxer if known from headers.
- * May be overriden by the decoder if it knows better.
+ * May be overridden by the decoder if it knows better.
* - encoding: Set by user.
* - decoding: Set by user if known, overridden by libavcodec if known
*/
/**
* Motion estimation algorithm used for video coding.
* 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
- * 8 (umh), 10 (tesa) [7, 8, 10 are x264 specific]
+ * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
* - encoding: MUST be set by user.
* - decoding: unused
*/
#define FF_CMP_VSAD 8
#define FF_CMP_VSSE 9
#define FF_CMP_NSSE 10
+#define FF_CMP_W53 11
+#define FF_CMP_W97 12
#define FF_CMP_DCTMAX 13
#define FF_CMP_DCT264 14
#define FF_CMP_CHROMA 256
/** Field order
* - encoding: set by libavcodec
- * - decoding: Set by libavcodec
+ * - decoding: Set by user.
*/
enum AVFieldOrder field_order;
/**
* Audio channel layout.
* - encoding: set by user.
- * - decoding: set by libavcodec.
+ * - decoding: set by user, may be overwritten by libavcodec.
*/
uint64_t channel_layout;
enum AVAudioServiceType audio_service_type;
/**
- * Used to request a sample format from the decoder.
- * - encoding: unused.
+ * desired sample format
+ * - encoding: Not used.
* - decoding: Set by user.
+ * Decoder will decode to this format if it can.
*/
enum AVSampleFormat request_sample_fmt;
int max_prediction_order;
/**
- * GOP timecode frame start number, in non drop frame format
- * - encoding: Set by user.
- * - decoding: unused
+ * GOP timecode frame start number
+ * - encoding: Set by user, in non drop frame format
+ * - decoding: Set by libavcodec (timecode in the 25 bits format, -1 if unset)
*/
int64_t timecode_frame_start;
#define AV_EF_BUFFER (1<<2)
#define AV_EF_EXPLODE (1<<3)
+#define AV_EF_CAREFUL (1<<16)
+#define AV_EF_COMPLIANT (1<<17)
+#define AV_EF_AGGRESSIVE (1<<18)
+
+
/**
* opaque 64bit number (generally a PTS) that will be reordered and
* output in AVFrame.reordered_opaque
* Hardware accelerator context.
* For some hardware accelerators, a global context needs to be
* provided by the user. In that case, this holds display-dependent
- * data Libav cannot instantiate itself. Please refer to the
- * Libav HW accelerator documentation to know how to fill this
+ * data FFmpeg cannot instantiate itself. Please refer to the
+ * FFmpeg HW accelerator documentation to know how to fill this
* is. e.g. for VA API, this is a struct vaapi_context.
* - encoding: unused
* - decoding: Set by user
* low resolution decoding, 1-> 1/2 size, 2->1/4 size
* - encoding: unused
* - decoding: Set by user.
- *
- * @deprecated use decoder private options instead
+ * Code outside libavcodec should access this field using:
+ * av_codec_{get,set}_lowres(avctx)
*/
- attribute_deprecated int lowres;
+ int lowres;
#endif
/**
#define FF_LEVEL_UNKNOWN -99
/**
- *
+ * Skip loop filtering for selected frames.
* - encoding: unused
* - decoding: Set by user.
*/
enum AVDiscard skip_loop_filter;
/**
- *
+ * Skip IDCT/dequantization for selected frames.
* - encoding: unused
* - decoding: Set by user.
*/
enum AVDiscard skip_idct;
/**
- *
+ * Skip decoding for selected frames.
* - encoding: unused
* - decoding: Set by user.
*/
* - decoding: unused.
*/
uint64_t vbv_delay;
+
+ /**
+ * Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
+ * Code outside libavcodec should access this field using:
+ * av_codec_{get,set}_pkt_timebase(avctx)
+ * - encoding unused.
+ * - decodimg set by user
+ */
+ AVRational pkt_timebase;
+
+ /**
+ * AVCodecDescriptor
+ * Code outside libavcodec should access this field using:
+ * av_codec_{get,set}_codec_descriptor(avctx)
+ * - encoding: unused.
+ * - decoding: set by libavcodec.
+ */
+ const AVCodecDescriptor *codec_descriptor;
+
+#if !FF_API_LOWRES
+ /**
+ * low resolution decoding, 1-> 1/2 size, 2->1/4 size
+ * - encoding: unused
+ * - decoding: Set by user.
+ * Code outside libavcodec should access this field using:
+ * av_codec_{get,set}_lowres(avctx)
+ */
+ int lowres;
+#endif
+
+ /**
+ * Current statistics for PTS correction.
+ * - decoding: maintained and used by libavcodec, not intended to be used by user apps
+ * - encoding: unused
+ */
+ int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far
+ int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far
+ int64_t pts_correction_last_pts; /// PTS of the last frame
+ int64_t pts_correction_last_dts; /// DTS of the last frame
+
+ /**
+ * Character encoding of the input subtitles file.
+ * - decoding: set by user
+ * - encoding: unused
+ */
+ char *sub_charenc;
+
+ /**
+ * Subtitles character encoding mode. Formats or codecs might be adjusting
+ * this setting (if they are doing the conversion themselves for instance).
+ * - decoding: set by libavcodec
+ * - encoding: unused
+ */
+ int sub_charenc_mode;
+#define FF_SUB_CHARENC_MODE_DO_NOTHING -1 ///< do nothing (demuxer outputs a stream supposed to be already in UTF-8, or the codec is bitmap for instance)
+#define FF_SUB_CHARENC_MODE_AUTOMATIC 0 ///< libavcodec will select the mode itself
+#define FF_SUB_CHARENC_MODE_PRE_DECODER 1 ///< the AVPacket data needs to be recoded to UTF-8 before being fed to the decoder, requires iconv
+
} AVCodecContext;
+AVRational av_codec_get_pkt_timebase (const AVCodecContext *avctx);
+void av_codec_set_pkt_timebase (AVCodecContext *avctx, AVRational val);
+
+const AVCodecDescriptor *av_codec_get_codec_descriptor(const AVCodecContext *avctx);
+void av_codec_set_codec_descriptor(AVCodecContext *avctx, const AVCodecDescriptor *desc);
+
+int av_codec_get_lowres(const AVCodecContext *avctx);
+void av_codec_set_lowres(AVCodecContext *avctx, int val);
+
/**
* AVProfile.
*/
const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
- attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
+ uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
const AVClass *priv_class; ///< AVClass for the private context
const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
* @}
*/
-#define AVPALETTE_SIZE 1024
-#define AVPALETTE_COUNT 256
-
enum AVSubtitleType {
SUBTITLE_NONE,
/**
* 0 terminated ASS/SSA compatible event line.
- * The pressentation of this is unaffected by the other values in this
+ * The presentation of this is unaffected by the other values in this
* struct.
*/
char *ass;
+
int flags;
} AVSubtitleRect;
*/
void avcodec_register_all(void);
+
+#if FF_API_ALLOC_CONTEXT
+/**
+ * Allocate an AVCodecContext and set its fields to default values. The
+ * resulting struct can be deallocated by simply calling av_free().
+ *
+ * @return An AVCodecContext filled with default values or NULL on failure.
+ * @see avcodec_get_context_defaults
+ *
+ * @deprecated use avcodec_alloc_context3()
+ */
+attribute_deprecated
+AVCodecContext *avcodec_alloc_context(void);
+
+/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
+ * we WILL change its arguments and name a few times! */
+attribute_deprecated
+AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
+
+/**
+ * Set the fields of the given AVCodecContext to default values.
+ *
+ * @param s The AVCodecContext of which the fields should be set to default values.
+ * @deprecated use avcodec_get_context_defaults3
+ */
+attribute_deprecated
+void avcodec_get_context_defaults(AVCodecContext *s);
+
+/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
+ * we WILL change its arguments and name a few times! */
+attribute_deprecated
+void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
+#endif
+
/**
* Allocate an AVCodecContext and set its fields to default values. The
* resulting struct can be deallocated by calling avcodec_close() on it followed
*/
const AVClass *avcodec_get_class(void);
+/**
+ * Get the AVClass for AVFrame. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
+ *
+ * @see av_opt_find().
+ */
+const AVClass *avcodec_get_frame_class(void);
+
+/**
+ * Get the AVClass for AVSubtitleRect. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
+ *
+ * @see av_opt_find().
+ */
+const AVClass *avcodec_get_subtitle_rect_class(void);
+
/**
* Copy the settings of the source AVCodecContext into the destination
* AVCodecContext. The resulting destination codec context will be
*/
void avcodec_free_frame(AVFrame **frame);
+#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(AV_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().
*/
int av_dup_packet(AVPacket *pkt);
+/**
+ * Copy packet, including contents
+ *
+ * @return 0 on success, negative AVERROR on fail
+ */
+int av_copy_packet(AVPacket *dst, AVPacket *src);
+
+/**
+ * Copy packet side data
+ *
+ * @return 0 on success, negative AVERROR on fail
+ */
+int av_copy_packet_side_data(AVPacket *dst, AVPacket *src);
+
/**
* Free a packet.
*
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);
+
+
/**
* @}
*/
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
int linesize_align[AV_NUM_DATA_POINTERS]);
+#if FF_API_OLD_DECODE_AUDIO
+/**
+ * Wrapper function which calls avcodec_decode_audio4.
+ *
+ * @deprecated Use avcodec_decode_audio4 instead.
+ *
+ * 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
+ * the remaining data in order to decode the second frame etc.
+ * If no frame
+ * could be outputted, frame_size_ptr is zero. Otherwise, it is the
+ * decompressed frame size in bytes.
+ *
+ * @warning You must set frame_size_ptr to the allocated size of the
+ * output buffer before calling avcodec_decode_audio3().
+ *
+ * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
+ * the actual read bytes because some optimized bitstream readers read 32 or 64
+ * bits at once and could read over the end.
+ *
+ * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
+ * no overreading happens for damaged MPEG streams.
+ *
+ * @warning You must not provide a custom get_buffer() when using
+ * avcodec_decode_audio3(). Doing so will override it with
+ * avcodec_default_get_buffer. Use avcodec_decode_audio4() instead,
+ * which does allow the application to provide a custom get_buffer().
+ *
+ * @note You might have to align the input buffer avpkt->data and output buffer
+ * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
+ * necessary at all, on others it won't work at all if not aligned and on others
+ * it will work but it will have an impact on performance.
+ *
+ * In practice, avpkt->data should have 4 byte alignment at minimum and
+ * samples should be 16 byte aligned unless the CPU doesn't need it
+ * (AltiVec and SSE do).
+ *
+ * @note Codecs which have the CODEC_CAP_DELAY capability set have a delay
+ * between input and output, these need to be fed with avpkt->data=NULL,
+ * avpkt->size=0 at the end to return the remaining frames.
+ *
+ * @param avctx the codec context
+ * @param[out] samples the output buffer, sample type in avctx->sample_fmt
+ * If the sample format is planar, each channel plane will
+ * be the same size, with no padding between channels.
+ * @param[in,out] frame_size_ptr the output buffer size in bytes
+ * @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.
+ * All decoders are designed to use the least fields possible though.
+ * @return On error a negative value is returned, otherwise the number of bytes
+ * used or zero if no frame data was decompressed (used) from the input AVPacket.
+ */
+attribute_deprecated int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
+ int *frame_size_ptr,
+ AVPacket *avpkt);
+#endif
+
/**
* Decode the audio frame of size avpkt->size from avpkt->data into frame.
*
* AVPacket is returned.
*/
int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
- int *got_frame_ptr, AVPacket *avpkt);
+ int *got_frame_ptr, const AVPacket *avpkt);
/**
* Decode the video frame of size avpkt->size from avpkt->data into picture.
*/
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
int *got_picture_ptr,
- AVPacket *avpkt);
+ const AVPacket *avpkt);
/**
* Decode a subtitle message.
* @{
*/
+enum AVPictureStructure {
+ AV_PICTURE_STRUCTURE_UNKNOWN, //< unknown
+ AV_PICTURE_STRUCTURE_TOP_FIELD, //< coded as top field
+ AV_PICTURE_STRUCTURE_BOTTOM_FIELD, //< coded as bottom field
+ AV_PICTURE_STRUCTURE_FRAME, //< coded as frame
+};
+
typedef struct AVCodecParserContext {
void *priv_data;
struct AVCodecParser *parser;
#define PARSER_FLAG_ONCE 0x0002
/// Set if the parser has a valid file offset
#define PARSER_FLAG_FETCHED_OFFSET 0x0004
+#define PARSER_FLAG_USE_CODEC_TS 0x1000
int64_t offset; ///< byte offset from starting packet start
int64_t cur_frame_end[AV_PARSER_PTS_NB];
int duration;
enum AVFieldOrder field_order;
+
+ /**
+ * Indicate whether a picture is coded as a frame, top field or bottom field.
+ *
+ * For example, H.264 field_pic_flag equal to 0 corresponds to
+ * AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag
+ * equal to 1 and bottom_field_flag equal to 0 corresponds to
+ * AV_PICTURE_STRUCTURE_TOP_FIELD.
+ */
+ enum AVPictureStructure picture_structure;
} AVCodecParserContext;
typedef struct AVCodecParser {
/**
* @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed
- * @deprecated use AVBitstreamFilter
+ * @deprecated use AVBitStreamFilter
*/
int av_parser_change(AVCodecParserContext *s,
AVCodecContext *avctx,
*/
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.
*
* 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.
+ * large enough, encoding will fail. If avpkt->data and
+ * avpkt->size are set, avpkt->destruct must also be set. 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
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.
*
* @}
*/
+#if FF_API_AVCODEC_RESAMPLE
+/**
+ * @defgroup lavc_resample Audio resampling
+ * @ingroup libavc
+ * @deprecated use libswresample instead
+ *
+ * @{
+ */
+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
+ */
+attribute_deprecated
+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
+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()
+ */
+attribute_deprecated
+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
+ */
+attribute_deprecated
+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
+ */
+attribute_deprecated
+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
+ */
+attribute_deprecated
+void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
+attribute_deprecated
+void av_resample_close(struct AVResampleContext *c);
+
+/**
+ * @}
+ */
+#endif
+
/**
* @addtogroup lavc_picture
* @{
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().
+ * Fill in the AVPicture fields, always assume a linesize alignment of
+ * 1.
*
- * @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_image_fill_arrays()
*/
-int avpicture_fill(AVPicture *picture, uint8_t *ptr,
+int avpicture_fill(AVPicture *picture, const uint8_t *ptr,
enum AVPixelFormat 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()
+ * Copy pixel data from an AVPicture into a buffer, always assume a
+ * linesize alignment of 1.
*
- * @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.
+ * @see av_image_copy_to_buffer()
*/
int avpicture_layout(const AVPicture* src, enum AVPixelFormat pix_fmt,
int width, int height,
/**
* 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().
+ * Always assume a linesize alignment of 1.
*
- * @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).
+ * @see av_image_get_buffer_size().
*/
int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height);
enum AVPixelFormat pix_fmt, int width, int height);
#endif
/**
- * Copy image src to dst. Wraps av_picture_data_copy() above.
+ * Copy image src to dst. Wraps av_image_copy().
*/
void av_picture_copy(AVPicture *dst, const AVPicture *src,
enum AVPixelFormat pix_fmt, int width, int height);
*/
/**
- * @deprecated Use av_pix_fmt_get_chroma_sub_sample
+ * Utility function to access log2_chroma_w log2_chroma_h from
+ * the pixel format AVPixFmtDescriptor.
+ *
+ * This function asserts that pix_fmt is valid. See av_pix_fmt_get_chroma_sub_sample
+ * for one that returns a failure code and continues in case of invalid
+ * pix_fmts.
+ *
+ * @param[in] pix_fmt the pixel format
+ * @param[out] h_shift store log2_chroma_w
+ * @param[out] v_shift store log2_chroma_h
+ *
+ * @see av_pix_fmt_get_chroma_sub_sample
*/
-void attribute_deprecated avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift);
+void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift);
/**
* Return a value representing the fourCC code associated to the
* @param[in] dst_pix_fmt destination pixel format
* @param[in] src_pix_fmt source pixel format
* @param[in] has_alpha Whether the source pixel format alpha channel is used.
- * @return Combination of flags informing you what kind of losses will occur.
+ * @return Combination of flags informing you what kind of losses will occur
+ * (maximum loss for an invalid dst_pix_fmt).
*/
int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
int has_alpha);
* 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_fmt2() searches which of
+ * some formats to other formats. avcodec_find_best_pix_fmt_of_2() 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_list parameter.
* @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 AVPixelFormat avcodec_find_best_pix_fmt_of_list(enum AVPixelFormat *pix_fmt_list,
+ enum AVPixelFormat 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_fmt_of_2() selects which of
+ * the given pixel formats should be used to suffer the least amount of loss.
+ *
+ * If one of the destination formats is AV_PIX_FMT_NONE the other pixel format (if valid) will be
+ * returned.
+ *
+ * @code
+ * src_pix_fmt = AV_PIX_FMT_YUV420P;
+ * dst_pix_fmt1= AV_PIX_FMT_RGB24;
+ * dst_pix_fmt2= AV_PIX_FMT_GRAY8;
+ * dst_pix_fmt3= AV_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_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, alpha, &loss);
+ * dst_pix_fmt = avcodec_find_best_pix_fmt_of_2(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 AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
+ enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
+
+attribute_deprecated
+#if AV_HAVE_INCOMPATIBLE_FORK_ABI
enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat *pix_fmt_list,
enum AVPixelFormat src_pix_fmt,
int has_alpha, int *loss_ptr);
+#else
+enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
+ enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
+#endif
+
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
//FIXME func typedef
/**
- * Fill audio frame data and linesize.
+ * Fill AVFrame audio data and linesize pointers.
+ *
+ * The buffer buf must be a preallocated buffer with a size big enough
+ * to contain the specified samples amount. The filled AVFrame data
+ * pointers will point to this buffer.
+ *
* AVFrame extended_data channel pointers are allocated if necessary for
* planar audio.
*
* @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
+ * @return >=0 on success, negative error code on failure
+ * @todo return the size in bytes required to store the samples in
+ * case of success, at the next libavutil bump
*/
int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
enum AVSampleFormat sample_fmt, const uint8_t *buf,
*/
int av_get_bits_per_sample(enum AVCodecID 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 AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE
+ */
+enum AVCodecID 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
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
/**
- * Allocate a buffer with padding, reusing the given one if large enough.
- *
* Same behaviour av_fast_malloc but the buffer has additional
- * FF_INPUT_PADDING_SIZE at the end which will always memset to 0.
+ * FF_INPUT_BUFFER_PADDING_SIZE at the end which will will always be 0.
*
+ * In addition the whole buffer will initially and after resizes
+ * be 0-initialized so that no uninitialized data will ever appear.
*/
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
+/**
+ * Same behaviour av_fast_padded_malloc except that buffer will always
+ * be 0-initialized after call.
+ */
+void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size);
+
/**
* Encode extradata length to a buffer. Used by xiph codecs.
*
#if FF_API_MISSING_SAMPLE
/**
* Log a generic warning message about a missing feature. This function is
- * intended to be used internally by Libav (libavcodec, libavformat, etc.)
+ * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
* only, and would normally not be used by applications.
* @param[in] avc a pointer to an arbitrary struct of which the first field is
* a pointer to an AVClass struct
/**
* Log a generic warning message asking for a sample. This function is
- * intended to be used internally by Libav (libavcodec, libavformat, etc.)
+ * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
* only, and would normally not be used by applications.
* @param[in] avc a pointer to an arbitrary struct of which the first field is
* a pointer to an AVClass struct
* lockmgr should store/get a pointer to a user allocated mutex. It's
* NULL upon AV_LOCK_CREATE and != NULL for all other ops.
*
- * @param cb User defined callback. Note: Libav may invoke calls to this
+ * @param cb User defined callback. Note: FFmpeg may invoke calls to this
* callback during the call to av_lockmgr_register().
* Thus, the application must be prepared to handle that.
* If cb is set to NULL the lockmgr will be unregistered.
*/
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id);
+/**
+ * Get the name of a codec.
+ * @return a static string identifying the codec; never NULL
+ */
+const char *avcodec_get_name(enum AVCodecID id);
+
/**
* @return a positive value if s is open (i.e. avcodec_open2() was called on it
* with no corresponding avcodec_close()), 0 otherwise.
projects / ffmpeg / blobdiff