actions/itgmania212121
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

remove the need for libtheora since we have ffmpeg to handle

Browse Source 
theora videos
This commit is contained in:
Austen Dicken
2012-03-12 23:26:34 -05:00
parent 354a345c4d
commit 0c94594541
18 changed files with 8 additions and 2294 deletions
Download Patch File Download Diff File Expand all files Collapse all files
extern/vorbis/theora/codec.h
Vendored
-557
View File
@@ -1,557 +0,0 @@
/********************************************************************
* *
* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2003 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function:
last mod: $Id: codec.h 26239 2007-05-10 01:53:20Z gmaynard $
********************************************************************/
/**\mainpage
*
* \section intro Introduction
*
* This is the documentation for the <tt>libtheora</tt> C API.
* <tt>libtheora</tt> is the reference implementation for
* <a href="http://www.theora.org/">Theora</a>, a free video codec.
* Theora is derived from On2's VP3 codec with additional features and
* integration for Ogg multimedia formats by
* <a href="http://www.xiph.org/">the Xiph.Org Foundation</a>.
* Complete documentation of the format itself is available in
* <a href="http://www.theora.org/doc/Theora_I_spec.pdf">the Theora
* specification</a>.
*
* \subsection Organization
*
* <tt>libtheora</tt> is actually subdivided into three separate libraries:
* - <tt>libtheoraenc</tt>, containing routines exclusive to the encoder.
* You must link to this if you use any of the functions listed in
* \ref encfuncs.
* - <tt>libtheoradec</tt>, containing routines exclusive to the decoder.
* You must link to this if you use any of the functions listed in
* \ref decfuncs.
* - <tt>libtheorabase</tt>, containing routines shared by the encoder and the
* decoder.
* You must link to this if you use any of the functions in this API, not
* not just those listed in \ref basefuncs.*/
/**\file
* The shared <tt>libtheora</tt> C API.*/
#if !defined(_O_THEORA_CODEC_H_)
# define _O_THEORA_CODEC_H_ (1)
# include <ogg/ogg.h>
#if defined(__cplusplus)
extern "C" {
#endif
/**\name Error codes*/
/*@{*/
/**An invalid pointer was provided.*/
#define OC_FAULT (-1)
/**An invalid argument was provided.*/
#define OC_EINVAL (-10)
/**The contents of the header were incomplete, invalid, or unexpected.*/
#define OC_BADHEADER (-20)
/**The header does not belong to a Theora stream.*/
#define OC_NOTFORMAT (-21)
/**The bitstream version is too high.*/
#define OC_VERSION (-22)
/**The specified function is not implemented.*/
#define OC_IMPL (-23)
/**There were errors in the video data packet.*/
#define OC_BADPACKET (-24)
/*@}*/
/**The currently defined color space tags.
* See <a href="http://www.theora.org/doc/Theora_I_spec.pdf">the Theora
* specification</a>, Chapter 4, for exact details on the meaning of each of
* these color spaces.*/
typedef enum{
/**The color space was not specified at the encoder.
It may be conveyed by an external means.*/
OC_CS_UNSPECIFIED,
/**A color space designed for NTSC content.*/
OC_CS_ITU_REC_470M,
/**A color space designed for PAL/SECAM content.*/
OC_CS_ITU_REC_470BG,
/**The total number of currently defined color spaces.*/
OC_CS_NSPACES
}theora_colorspace;
/**The currently defined pixel format tags.
* See <a href="http://www.theora.org/doc/Theora_I_spec.pdf">the Theora
* specification</a>, Section 4.4, for details on the precise sample
* locations.*/
typedef enum{
/**Chroma decimation by 2 in both the X and Y directions (4:2:0).*/
OC_PF_420,
/**Currently reserved.*/
OC_PF_RSVD,
/**Chroma decimation by 2 in the X direction (4:2:2).*/
OC_PF_422,
/**No chroma decimation (4:4:4).*/
OC_PF_444,
/**The total number of currently defined pixel formats.*/
OC_PF_NFORMATS
}theora_pixel_fmt;
/**A buffer for a single color plane in an uncompressed image.
* This contains the image data in a left-to-right, top-down format.
* Each row of pixels is stored contiguously in memory, but successive rows
* need not be.
* Use \a ystride to compute the offset of the next row.
* The encoder accepts both positive \a ystride values (top-down) and negative
* (bottom-up).
* The decoder currently always generates images with positive strides.
*/
typedef struct{
/**The width of this plane.*/
int width;
/**The height of this plane.*/
int height;
/**The offset in bytes between successive rows.*/
int ystride;
/**A pointer to the first row.*/
unsigned char *data;
}theora_img_plane;
/**A complete image buffer for an uncompressed frame.
* The chroma planes may be decimated by a factor of two in either direction,
* as indicated by theora_info#pixel_fmt.
* The width and height of the Y' plane must be multiples of 16.
* They may need to be cropped for display, using the rectangle specified by
* theora_info#pic_x, theora_info#pic_y, theora_info#pic_width, and
* theora_info#pic_height.
* All samples are 8 bits.
* \note The term YUV often used to describe a colorspace is ambiguous.
* The exact parameters of the RGB to YUV conversion process aside, in many
* contexts the U and V channels actually have opposite meanings.
* To avoid this confusion, we are explicit: the name of the color channels is
* Y'CbCr, and they appear in that order, always.
* The prime symbol denotes that the Y channel is non-linear.
* Cb and Cr stand for "Chroma blue" and "Chroma red" respectively.*/
typedef theora_img_plane theora_ycbcr_buffer[3];
/**Theora bitstream information.
* This contains the basic playback parameters for a stream, and corresponds to
* the initial 'info' header packet.
* To initialize an encoder, the application fills in this structure and
* passes it to theora_encode_alloc().
* A default encoding mode is chosen based on the values of the #quality and
* #target_bitrate fields.
* On decode, it is filled in by theora_decode_headerin(), and then passed to
* theora_decode_alloc().
*
* Encoded Theora frames must be a multiple of 16 in size;
* this is what the #frame_width and #frame_height members represent.
* To handle arbitrary picture sizes, a crop rectangle is specified in the
* #pic_x, #pic_y, #pic_width and #pic_height members.
*
* All frame buffers contain pointers to the full, padded frame.
* However, the current encoder <em>will not</em> reference pixels outside of
* the cropped picture region, and the application does not need to fill them
* in.
* The decoder <em>will</em> allocate storage for a full frame, but the
* application <em>should not</em> rely on the padding containing sensible
* data.
*
* It is also generally recommended that the offsets and sizes should still be
* multiples of 2 to avoid chroma sampling shifts.
* See <a href="http://www.theora.org/doc/Theora_I_spec.pdf">the Theora
* specification</a>, Section 4.4, for more details.
*
* Frame rate, in frames per second, is stored as a rational fraction, as is
* the pixel aspect ratio.
* Note that this refers to the aspect ratio of the individual pixels, not of
* the overall frame itself.
* The frame aspect ratio can be computed from pixel aspect ratio using the
* image dimensions.
*/
typedef struct{
/**\name Theora version
* Bitstream version information.*/
/*@{*/
unsigned char version_major;
unsigned char version_minor;
unsigned char version_subminor;
/*@}*/
/**The encoded frame width.
* This must be a multiple of 16, and less than 1048576.*/
ogg_uint32_t frame_width;
/**The encoded frame height.
* This must be a multiple of 16, and less than 1048576.*/
ogg_uint32_t frame_height;
/**The displayed picture width.
* This must be no larger than width.*/
ogg_uint32_t pic_width;
/**The displayed picture height.
* This must be no larger than height.*/
ogg_uint32_t pic_height;
/**The X offset of the displayed picture.
* This must be no larger than #frame_width-#pic_width or 255, whichever is
* smaller.*/
ogg_uint32_t pic_x;
/**The Y offset of the displayed picture.
* This must be no larger than #frame_height-#pic_height, and
* #frame_height-#pic_height-#pic_y must be no larger than 255.
* This offset is specified from the top of the image, as this API uses the
* standard graphics left-handed coordinate system.*/
ogg_uint32_t pic_y;
/**\name Frame rate
* The frame rate, as a fraction.
* If either is 0, the frame rate is undefined.*/
/*@{*/
ogg_uint32_t fps_numerator;
ogg_uint32_t fps_denominator;
/*@}*/
/**\name Aspect ratio
* The aspect ratio of the pixels.
* If either value is zero, the aspect ratio is undefined.
* If not specified by any external means, 1:1 should be assumed.*/
/*@{*/
ogg_uint32_t aspect_numerator;
ogg_uint32_t aspect_denominator;
/*@}*/
/**The color space.*/
theora_colorspace colorspace;
/**The pixel format.*/
theora_pixel_fmt pixel_fmt;
/**The target bit-rate in bits per second.
If initializing an encoder with this struct, set this field to a non-zero
value to activate CBR encoding by default.*/
/*TODO: Current encoder does not support CBR mode, or anything like it.
We also don't really know what nominal rate each quality level
corresponds to yet.*/
int target_bitrate;
/**The target quality level.
Valid values range from 0 to 63, inclusive, with higher values giving
higher quality.
If initializing an encoder with this struct, and #target_bitrate is set
to zero, VBR encoding at this quality will be activated by default.*/
/*Currently this is set so that a qi of 0 corresponds to distortions of 24
times the JND, and each increase by 16 halves that value.
This gives us fine discrimination at low qualities, yet effective rate
control at high qualities.
The qi value 63 is special, however.
For this, the highest quality, we use one half of a JND for our threshold.
Due to the lower bounds placed on allowable quantizers in Theora, we will
not actually be able to achieve quality this good, but this should
provide as close to visually lossless quality as Theora is capable of.
We could lift the quantizer restrictions without breaking VP3.1
compatibility, but this would result in quantized coefficients that are
too large for the current bitstream to be able to store.
We'd have to redesign the token syntax to store these large coefficients,
which would make transcoding complex.*/
int quality;
/**The amount to shift to extract the last keyframe number from the granule
* position.
* This can be at most 31.
* theora_info_init() will set this to a default value (currently <tt>6</tt>,
* which is good for streaming applications), but you can set it to 0 to
* make every frame a keyframe.
* The maximum distance between key frames is
* <tt>1<<#keyframe_granule_shift</tt>.
* The keyframe frequency can be more finely controlled with
* #OC_ENCCTL_SET_KEYFRAME_FREQUENCY_FORCE, which can also be adjusted
* during encoding (for example, to force the next frame to be a keyframe),
* but it cannot be set larger than the amount permitted by this field after
* the headers have been output.*/
int keyframe_granule_shift;
}theora_info;
/**The comment information.
*
* This structure holds the in-stream metadata corresponding to
* the 'comment' header packet.
* The comment header is meant to be used much like someone jotting a quick
* note on the label of a video.
* It should be a short, to the point text note that can be more than a couple
* words, but not more than a short paragraph.
*
* The metadata is stored as a series of (tag, value) pairs, in
* length-encoded string vectors.
* The first occurrence of the '=' character delimits the tag and value.
* A particular tag may occur more than once, and order is significant.
* The character set encoding for the strings is always UTF-8, but the tag
* names are limited to ASCII, and treated as case-insensitive.
* See <a href="http://www.theora.org/doc/Theora_I_spec.pdf">the Theora
* specification</a>, Section 6.3.3 for details.
*
* In filling in this structure, theora_decode_header() will null-terminate
* the user_comment strings for safety.
* However, the bitstream format itself treats them as 8-bit clean vectors,
* possibly containing null characters, and so the length array should be
* treated as their authoritative length.
*/
typedef struct theora_comment{
/**The array of comment string vectors.*/
char **user_comments;
/**An array of the corresponding length of each vector, in bytes.*/
int *comment_lengths;
/**The total number of comment strings.*/
int comments;
/**The null-terminated vendor string.
This identifies the software used to encode the stream.*/
char *vendor;
}theora_comment;
/**A single base matrix.*/
typedef unsigned char theora_quant_base[64];
/**A set of \a qi ranges.*/
typedef struct{
/**The number of ranges in the set.*/
int nranges;
/**The size of each of the #nranges ranges.
These must sum to 63.*/
const int *sizes;
/**#nranges <tt>+1</tt> base matrices.
Matrices \a i and <tt>i+1</tt> form the endpoints of range \a i.*/
const theora_quant_base *base_matrices;
}theora_quant_ranges;
/**A complete set of quantization parameters.
The quantizer for each coefficient is calculated as:
\code
Q=MAX(MIN(qmin[qti][ci!=0],scale[ci!=0][qi]*base[qti][pli][qi][ci]/100),
1024).
\endcode
\a qti is the quantization type index: 0 for intra, 1 for inter.
<tt>ci!=0</tt> is 0 for the DC coefficient and 1 for the AC coefficient.
\a qi is the quality index, ranging between 0 (low quality) and 63 (high
quality).
\a pli is the color plane index: 0 for Y', 1 for Cb, 2 for Cr.
\a ci is the DCT coefficient index.
Coefficient indices correspond to the normal 2D DCT block
ordering--row-major with low frequencies first--\em not zig-zag order.
Minimum quantizers are constant, and are given by:
\code
qmin[2][2]={{4,2},{8,4}}.
\endcode
Parameters that can be stored in the bitstream are as follows:
- The two scale matrices ac_scale and dc_scale.
\code
scale[2][64]={dc_scale,ac_scale}.
\endcode
- The base matrices for each \a qi, \a qti and \a pli (up to 384 in all).
In order to avoid storing a full 384 base matrices, only a sparse set of
matrices is stored, and the rest are linearly interpolated.
This is done as follows.
For each \a qti and \a pli, a series of \a n \a qi ranges is defined.
The size of each \a qi range can vary arbitrarily, but they must sum to
63.
Then, <tt>n+1</tt> matrices are specified, one for each endpoint of the
ranges.
For interpolation purposes, each range's endpoints are the first \a qi
value it contains and one past the last \a qi value it contains.
Fractional values are rounded to the nearest integer, with ties rounded
away from zero.
Base matrices are stored by reference, so if the same matrices are used
multiple times, they will only appear once in the bitstream.
The bitstream is also capable of omitting an entire set of ranges and
its associated matrices if they are the same as either the previous
set (indexed in row-major order) or if the inter set is the same as the
intra set.
- Loop filter limit values.
The same limits are used for the loop filter in all color planes, despite
potentially differing levels of quantization in each.
For the current encoder, <tt>scale[ci!=0][qi]</tt> must be no greater
than <tt>scale[ci!=0][qi-1]</tt> and <tt>base[qti][pli][qi][ci]</tt> must
be no greater than <tt>base[qti][pli][qi-1][ci]</tt>.
These two conditions ensure that the actual quantizer for a given \a qti,
\a pli, and \a ci does not increase as \a qi increases.
This is not required by the decoder.*/
typedef struct{
/**The DC scaling factors.*/
ogg_uint16_t dc_scale[64];
/**The AC scaling factors.*/
ogg_uint16_t ac_scale[64];
/**The loop filter limit values.*/
unsigned char loop_filter_limits[64];
/**The \a qi ranges for each \a ci and \a pli.*/
theora_quant_ranges qi_ranges[2][3];
}theora_quant_info;
/**The number of Huffman tables used by Theora.*/
#define OC_NHUFFMAN_TABLES (80)
/**The number of DCT token values in each table.*/
#define OC_NDCT_TOKENS (32)
/**A Huffman code for a Theora DCT token.
* Each set of Huffman codes in a given table must form a complete, prefix-free
* code.
* There is no requirement that all the tokens in a table have a valid code,
* but the current encoder is not optimized to take advantage of this.
* If there is not at least one table with a code for every token in each of
* the five groups of 16 tables, then the encoder may fail to encode certain
* frames.
* The complete table in the first group of 16 does not have to be in the same
* place as the complete table in the other groups, but the complete tables in
* the remaining four groups must all be in the same place.*/
typedef struct{
/**The bit pattern for the code, with the LSbit of the pattern aligned in
* the LSbit of the word.*/
ogg_uint32_t pattern;
/**The number of bits in the code.
* This must be between 0 and 32, inclusive.*/
int nbits;
}theora_huff_code;
/**\defgroup basefuncs Functions Shared by Encode and Decode*/
/*@{*/
/**\name Basic shared functions*/
/*@{*/
/**Retrieves a human-readable string to identify the library vendor and
* version.
* \return the version string.*/
extern const char *theora_version_string(void);
/**Retrieves the library version number.
* This is the highest bitstream version that the encoder library will produce,
* or that the decoder library can decode.
* This number is composed of a 16-bit major version, 8-bit minor version
* and 8 bit sub-version, composed as follows:
* \code
* (VERSION_MAJOR<<16)+(VERSION_MINOR<<8)+(VERSION_SUBMINOR)
* \endcode
* \return the version number.*/
extern ogg_uint32_t theora_version_number(void);
/**Converts a granule position to an absolute frame number.
* The granule position is interpreted in the context of a given
* #theora_enc_ctx or #theora_dec_ctx handle (either will suffice).
* \param _encdec A previously allocated #theora_enc_ctx or #theora_dec_ctx
* handle.
* \param _granpos The granule position to convert.
* \returns The absolute frame number corresponding to \a _granpos.
* \retval -1 The given granule position was invalid (i.e. negative).*/
extern ogg_int64_t theora_granule_frame(void *_encdec,ogg_int64_t _granpos);
/**Converts a granule position to an absolute time in seconds.
* The granule position is interpreted in the context of a given
* #theora_enc_ctx or #theora_dec_ctx handle (either will suffice).
* \param _encdec A previously allocated #theora_enc_ctx or #theora_dec_ctx
* handle.
* \param _granpos The granule position to convert.
* \return The absolute time in seconds corresponding to \a _granpos.
* \retval -1 The given granule position was invalid (i.e. negative).*/
extern double theora_granule_time(void *_encdec,ogg_int64_t _granpos);
/**Determines whether a Theora packet is a header or not.
* This function does no verification beyond checking the packet type bit, so
* it should not be used for bitstream identification; use
* theora_decode_headerin() for that.
* \param _op An <tt>ogg_packet</tt> containing encoded Theora data.
* \retval 1 The packet is a header packet
* \retval 0 The packet is a video data packet.*/
extern int theora_packet_isheader(ogg_packet *_op);
/**Determines whether a theora packet is a key frame or not.
* This function does no verification beyond checking the packet type and
* key frame bits, so it should not be used for bitstream identification; use
* theora_decode_headerin() for that.
* \param _op An <tt>ogg_packet</tt> containing encoded Theora data.
* \retval 1 The packet contains a key frame.
* \retval 0 The packet contains a delta frame.
* \retval -1 The packet is not a video data packet.*/
extern int theora_packet_iskeyframe(ogg_packet *_op);
/*@}*/
/**\name Functions for manipulating header data*/
/*@{*/
/**Initializes a theora_info structure.
* This should be called on a freshly allocated #theora_info structure before
* attempting to use it.
* \param _info The #theora_info struct to initialize.*/
extern void theora_info_init(theora_info *_info);
/**Clears a #theora_info structure.
* This should be called on a #theora_info structure after it is no longer
* needed.
* \param _info The #theora_info struct to clear.*/
extern void theora_info_clear(theora_info *_info);
/**Initialize a #theora_comment structure.
* This should be called on a freshly allocated #theora_comment structure
* before attempting to use it.
* \param _tc The #theora_comment struct to initialize.*/
extern void theora_comment_init(theora_comment *_tc);
/**Add a comment to an initialized #theora_comment structure.
* \note Neither theora_comment_add() nor theora_comment_add_tag() support
* comments containing null values, although the bitstream format does
* support them.
* To add such comments you will need to manipulate the #theora_comment
* structure directly.
* \param _tc The #theora_comment struct to add the comment to.
* \param _comment Must be a null-terminated UTF-8 string containing the
* comment in "TAG=the value" form.*/
extern void theora_comment_add(theora_comment *_tc, char *_comment);
/**Add a comment to an initialized #theora_comment structure.
* \note Neither theora_comment_add() nor theora_comment_add_tag() support
* comments containing null values, although the bitstream format does
* support them.
* To add such comments you will need to manipulate the #theora_comment
* structure directly.
* \param _tc The #theora_comment struct to add the comment to.
* \param _tag A null-terminated string containing the tag associated with
* the comment.
* \param _val The corresponding value as a null-terminated string.*/
extern void theora_comment_add_tag(theora_comment *_tc,char *_tag,char *_val);
/**Look up a comment value by its tag.
* \param _tc An initialized #theora_comment structure.
* \param _tag The tag to look up.
* \param _count The instance of the tag.
* The same tag can appear multiple times, each with a distinct
* value, so an index is required to retrieve them all.
* The order these values appear in is significant and should be
* preserved.
* Use theora_comment_query_count() to get the legal range for
* the \a _count parameter.
* \return A pointer to the queried tag's value.
* \retval NULL If no matching tag is found.*/
extern char *theora_comment_query(theora_comment *_tc,char *_tag,int _count);
/**Look up the number of instances of a tag.
* Call this first when querying for a specific tag and then iterate over the
* number of instances with separate calls to theora_comment_query() to
* retrieve all instances in order.
* \param _tc An initialized #theora_comment structure.
* \param _tag The tag to look up.
* \return The number on instances of this particular tag.*/
extern int theora_comment_query_count(theora_comment *_tc,char *_tag);
/**Clears a #theora_comment structure.
* This should be called on a #theora_comment structure after it is no longer
* needed.
* It will free all memory used by the structure members.
* \param _tc The #theora_comment struct to clear.*/
extern void theora_comment_clear(theora_comment *_tc);
/*@}*/
/*@}*/
#if defined(__cplusplus)
}
#endif
#endif
extern/vorbis/theora/theora.h
Vendored
-534
View File
@@ -1,534 +0,0 @@
/********************************************************************
* *
* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2003 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function:
last mod: $Id: theora.h 18100 2005-10-20 10:59:59Z gmaynard $
********************************************************************/
#ifndef _O_THEORA_H_
#define _O_THEORA_H_
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
#ifndef LIBOGG2
#include <../extern/vorbis/ogg/ogg.h>
#else
#include <../extern/vorbis/ogg2/ogg.h>
/* This is temporary until libogg2 is more complete */
ogg_buffer_state *ogg_buffer_create(void);
#endif
/** \mainpage
*
* \section intro Introduction
*
* This is the documentation for the libtheora C API.
* libtheora is the reference implementation for
* <a href="http://www.theora.org/">Theora</a>, a free video codec.
* Theora is derived from On2's VP3 codec with improved integration for
* Ogg multimedia formats by <a href="http://www.xiph.org/">Xiph.Org</a>.
*/
/** \file
* The libtheora C API.
*/
/**
* A YUV buffer for passing uncompressed frames to and from the codec.
* This holds a Y'CbCr frame in planar format. The CbCr planes can be
* subsampled and have their own separate dimensions and row stride
* offsets. Note that the strides may be negative in some
* configurations. For theora the width and height of the largest plane
* must be a multiple of 16. The actual meaningful picture size and
* offset are stored in the theora_info structure; frames returned by
* the decoder may need to be cropped for display.
* All samples are 8 bits.
*/
typedef struct {
int y_width; /**< Width of the Y' luminance plane */
int y_height; /**< Height of the luminance plane */
int y_stride; /**< Offset in bytes between successive rows */
int uv_width; /**< Height of the Cb and Cr chroma planes */
int uv_height; /**< Width of the chroma planes */
int uv_stride; /**< Offset between successive chroma rows */
unsigned char *y; /**< Pointer to start of luminance data */
unsigned char *u; /**< Pointer to start of Cb data */
unsigned char *v; /**< Pointer to start of Cr data */
} yuv_buffer;
/**
* A Colorspace.
*/
typedef enum {
OC_CS_UNSPECIFIED, /**< The colorspace is unknown or unspecified */
OC_CS_ITU_REC_470M, /**< This is the best option for 'NTSC' content */
OC_CS_ITU_REC_470BG, /**< This is the best option for 'PAL' content */
OC_CS_NSPACES /**< This marks the end of the defined colorspaces */
} theora_colorspace;
/**
* A Chroma subsampling
*
* These enumerate the available chroma subsampling options supported
* by the theora format. See Section 4.4 of the specification for
* exact definitions.
*/
typedef enum {
OC_PF_420, /**< Chroma subsampling by 2 in each direction (4:2:0) */
OC_PF_RSVD, /**< Reserved value */
OC_PF_422, /**< Horizonatal chroma subsampling by 2 (4:2:2) */
OC_PF_444, /**< No chroma subsampling at all (4:4:4) */
} theora_pixelformat;
/**
* Theora bitstream info.
* Contains the basic playback parameters for a stream,
* corresponds to the initial 'info' header packet.
*
* Encoded theora frames must be a multiple of 16 is size;
* this is what the width and height members represent. To
* handle other sizes, a crop rectangle is specified in
* frame_height and frame_width, offset_x and offset_y. The
* offset and size should still be a power of 2 to avoid
* chroma sampling shifts.
*
* Frame rate, in frames per second is stored as a rational
* fraction. So is the aspect ratio. Note that this refers
* to the aspect ratio of the frame pixels, not of the
* overall frame itself.
*
* see the example code for use of the other parameters and
* good default settings for the encoder parameters.
*/
typedef struct {
ogg_uint32_t width;
ogg_uint32_t height;
ogg_uint32_t frame_width;
ogg_uint32_t frame_height;
ogg_uint32_t offset_x;
ogg_uint32_t offset_y;
ogg_uint32_t fps_numerator;
ogg_uint32_t fps_denominator;
ogg_uint32_t aspect_numerator;
ogg_uint32_t aspect_denominator;
theora_colorspace colorspace;
int target_bitrate;
int quality; /**< Nominal quality setting, 0-63 */
int quick_p; /**< Quick encode/decode */
/* decode only */
unsigned char version_major;
unsigned char version_minor;
unsigned char version_subminor;
void *codec_setup;
/* encode only */
int dropframes_p;
int keyframe_auto_p;
ogg_uint32_t keyframe_frequency;
ogg_uint32_t keyframe_frequency_force; /* also used for decode init to
get granpos shift correct */
ogg_uint32_t keyframe_data_target_bitrate;
ogg_int32_t keyframe_auto_threshold;
ogg_uint32_t keyframe_mindistance;
ogg_int32_t noise_sensitivity;
ogg_int32_t sharpness;
theora_pixelformat pixelformat;
} theora_info;
/** Codec internal state and context.
*/
typedef struct{
theora_info *i;
ogg_int64_t granulepos;
void *internal_encode;
void *internal_decode;
} theora_state;
/**
* Comment header metadata.
*
* This structure holds the in-stream metadata corresponding to
* the 'comment' header packet.
*
* Meta data is stored as a series of (tag, value) pairs, in
* length-encoded string vectors. The first occurence of the
* '=' character delimits the tag and value. A particular tag
* may occur more than once. The character set encoding for
* the strings is always utf-8, but the tag names are limited
* to case-insensitive ascii. See the spec for details.
*
* In filling in this structure, theora_decode_header() will
* null-terminate the user_comment strings for safety. However,
* the bitstream format itself treats them as 8-bit clean,
* and so the length array should be treated as authoritative
* for their length.
*/
typedef struct theora_comment{
char **user_comments; /**< An array of comment string vectors */
int *comment_lengths; /**< An array of corresponding string vector lengths in bytes */
int comments; /**< The total number of comment string vectors */
char *vendor; /**< The vendor string identifying the encoder, null terminated */
} theora_comment;
#define OC_FAULT -1 /**< General failure */
#define OC_EINVAL -10 /**< Library encountered invalid internal data */
#define OC_DISABLED -11 /**< Requested action is disabled */
#define OC_BADHEADER -20 /**< Header packet was corrupt/invalid */
#define OC_NOTFORMAT -21 /**< Packet is not a theora packet */
#define OC_VERSION -22 /**< Bitstream version is not handled */
#define OC_IMPL -23 /**< Feature or action not implemented */
#define OC_BADPACKET -24 /**< Packet is corrupt */
#define OC_NEWPACKET -25 /**< Packet is an (ignorable) unhandled extension */
/**
* Retrieve a human-readable string to identify the encoder vendor and version.
* \returns A version string.
*/
extern const char *theora_version_string(void);
/**
* Retrieve a 32-bit version number.
* This number is composed of a 16-bit major version, 8-bit minor version
* and 8 bit sub-version, composed as follows:
<pre>
(VERSION_MAJOR<<16) + (VERSION_MINOR<<8) + (VERSION_SUB)
</pre>
* \returns The version number.
*/
extern ogg_uint32_t theora_version_number(void);
/**
* Initialize the theora encoder.
* \param th The theora_state handle to initialize for encoding.
* \param ti A theora_info struct filled with the desired encoding parameters.
* \retval 0 Success
*/
extern int theora_encode_init(theora_state *th, theora_info *ti);
/**
* Submit a YUV buffer to the theora encoder.
* \param t A theora_state handle previously initialized for encoding.
* \param yuv A buffer of YUV data to encode.
* \retval OC_EINVAL Encoder is not ready, or is finished.
* \retval -1 The size of the given frame differs from those previously input
* \retval 0 Success
*/
extern int theora_encode_YUVin(theora_state *t, yuv_buffer *yuv);
/**
* Request the next packet of encoded video.
* The encoded data is placed in a user-provided ogg_packet structure.
* \param t A theora_state handle previously initialized for encoding.
* \param last_p whether this is the last packet the encoder should produce.
* \param op An ogg_packet structure to fill. libtheora will set all
* elements of this structure, including a pointer to encoded
* data. The memory for the encoded data is owned by libtheora.
* \retval 0 No internal storage exists OR no packet is ready
* \retval -1 The encoding process has completed
* \retval 1 Success
*/
extern int theora_encode_packetout( theora_state *t, int last_p,
ogg_packet *op);
/**
* Request a packet containing the initial header.
* A pointer to the header data is placed in a user-provided ogg_packet
* structure.
* \param t A theora_state handle previously initialized for encoding.
* \param op An ogg_packet structure to fill. libtheora will set all
* elements of this structure, including a pointer to the header
* data. The memory for the header data is owned by libtheora.
* \retval 0 Success
*/
extern int theora_encode_header(theora_state *t, ogg_packet *op);
/**
* Request a comment header packet from provided metadata.
* A pointer to the comment data is placed in a user-provided ogg_packet
* structure.
* \param tc A theora_comment structure filled with the desired metadata
* \param op An ogg_packet structure to fill. libtheora will set all
* elements of this structure, including a pointer to the encoded
* comment data. The memory for the comment data is owned by
* libtheora.
* \retval 0 Success
*/
extern int theora_encode_comment(theora_comment *tc, ogg_packet *op);
/**
* Request a packet containing the codebook tables for the stream.
* A pointer to the codebook data is placed in a user-provided ogg_packet
* structure.
* \param t A theora_state handle previously initialized for encoding.
* \param op An ogg_packet structure to fill. libtheora will set all
* elements of this structure, including a pointer to the codebook
* data. The memory for the header data is owned by libtheora.
* \retval 0 Success
*/
extern int theora_encode_tables(theora_state *t, ogg_packet *op);
/**
* Decode an Ogg packet, with the expectation that the packet contains
* an initial header, comment data or codebook tables.
*
* \param ci A theora_info structure to fill. This must have been previously
* initialized with theora_info_init(). If \a op contains an initial
* header, theora_decode_header() will fill \a ci with the
* parsed header values. If \a op contains codebook tables,
* theora_decode_header() will parse these and attach an internal
* representation to \a ci->codec_setup.
* \param cc A theora_comment structure to fill. If \a op contains comment
* data, theora_decode_header() will fill \a cc with the parsed
* comments.
* \param op An ogg_packet structure which you expect contains an initial
* header, comment data or codebook tables.
*
* \retval OC_BADHEADER \a op is NULL; OR the first byte of \a op->packet
* has the signature of an initial packet, but op is
* not a b_o_s packet; OR this packet has the signature
* of an initial header packet, but an initial header
* packet has already been seen; OR this packet has the
* signature of a comment packet, but the initial header
* has not yet been seen; OR this packet has the signature
* of a comment packet, but contains invalid data; OR
* this packet has the signature of codebook tables,
* but the initial header or comments have not yet
* been seen; OR this packet has the signature of codebook
* tables, but contains invalid data;
* OR the stream being decoded has a compatible version
* but this packet does not have the signature of a
* theora initial header, comments, or codebook packet
* \retval OC_VERSION The packet data of \a op is an initial header with
* a version which is incompatible with this version of
* libtheora.
* \retval OC_NEWPACKET the stream being decoded has an incompatible (future)
* version and contains an unknown signature.
* \retval 0 Success
*
* \note The normal usage is that theora_decode_header() be called on the
* first three packets of a theora logical bitstream in succession.
*/
extern int theora_decode_header(theora_info *ci, theora_comment *cc,
ogg_packet *op);
/**
* Initialize a theora_state handle for decoding.
* \param th The theora_state handle to initialize.
* \param c A theora_info struct filled with the desired decoding parameters.
* This is of course usually obtained from a previous call to
* theora_decode_header().
* \retval 0 Success
*/
extern int theora_decode_init(theora_state *th, theora_info *c);
/**
* Input a packet containing encoded data into the theora decoder.
* \param th A theora_state handle previously initialized for decoding.
* \param op An ogg_packet containing encoded theora data.
* \retval 0 Success
* \retval OC_BADPACKET \a op does not contain encoded video data
*/
extern int theora_decode_packetin(theora_state *th,ogg_packet *op);
/**
* Output the next available frame of decoded YUV data.
* \param th A theora_state handle previously initialized for decoding.
* \param yuv A yuv_buffer in which libtheora should place the decoded data.
* \retval 0 Success
*/
extern int theora_decode_YUVout(theora_state *th,yuv_buffer *yuv);
/**
* Report whether a theora packet is a header or not
* This function does no verification beyond checking the header
* flag bit so it should not be used for bitstream identification;
* use theora_decode_header() for that.
*
* \param op An ogg_packet containing encoded theora data.
* \retval 1 The packet is a header packet
* \retval 0 The packet is not a header packet (and so contains frame data)
*
* Thus function was added in the 1.0alpha4 release.
*/
extern int theora_packet_isheader(ogg_packet *op);
/**
* Report whether a theora packet is a keyframe or not
*
* \param op An ogg_packet containing encoded theora data.
* \retval 1 The packet contains a keyframe image
* \retval 0 The packet is contains an interframe delta
* \retval -1 The packet is not an image data packet at all
*
* Thus function was added in the 1.0alpha4 release.
*/
extern int theora_packet_iskeyframe(ogg_packet *op);
/**
* Report the granulepos shift radix
*
* When embedded in Ogg, Theora uses a two-part granulepos,
* splitting the 64-bit field into two pieces. The more-significant
* section represents the frame count at the last keyframe,
* and the less-significant section represents the count of
* frames since the last keyframe. In this way the overall
* field is still non-decreasing with time, but usefully encodes
* a pointer to the last keyframe, which is necessary for
* correctly restarting decode after a seek.
*
* This function reports the number of bits used to represent
* the distance to the last keyframe, and thus how the granulepos
* field must be shifted or masked to obtain the two parts.
*
* Since libtheora returns compressed data in an ogg_packet
* structure, this may be generally useful even if the Theora
* packets are not being used in an Ogg container.
*
* \param ti A previously initialized theora_info struct
* \returns The bit shift dividing the two granulepos fields
*
* This function was added in the 1.0alpha5 release.
*/
int theora_granule_shift(theora_info *ti);
/**
* Convert a granulepos to an absolute frame number. The granulepos is
* interpreted in the context of a given theora_state handle.
*
* \param th A previously initialized theora_state handle (encode or decode)
* \param granulepos The granulepos to convert.
* \returns The frame number corresponding to \a granulepos.
* \retval -1 The given granulepos is undefined (i.e. negative)
*
* Thus function was added in the 1.0alpha4 release.
*/
extern ogg_int64_t theora_granule_frame(theora_state *th,ogg_int64_t granulepos);
/**
* Convert a granulepos to absolute time in seconds. The granulepos is
* interpreted in the context of a given theora_state handle.
* \param th A previously initialized theora_state handle (encode or decode)
* \param granulepos The granulepos to convert.
* \returns The absolute time in seconds corresponding to \a granulepos.
* \retval -1. The given granulepos is undefined (i.e. negative), or
* \retval -1. The function has been disabled because floating
* point support is not available.
*/
extern double theora_granule_time(theora_state *th,ogg_int64_t granulepos);
/**
* Initialize a theora_info structure. All values within the given theora_info
* structure are initialized, and space is allocated within libtheora for
* internal codec setup data.
* \param c A theora_info struct to initialize.
*/
extern void theora_info_init(theora_info *c);
/**
* Clear a theora_info structure. All values within the given theora_info
* structure are cleared, and associated internal codec setup data is freed.
* \param c A theora_info struct to initialize.
*/
extern void theora_info_clear(theora_info *c);
/**
* Free all internal data associated with a theora_state handle.
* \param t A theora_state handle.
*/
extern void theora_clear(theora_state *t);
/**
* Initialize an allocated theora_comment structure
* \param tc An allocated theora_comment structure
**/
extern void theora_comment_init(theora_comment *tc);
/**
* Add a comment to an initialized theora_comment structure
* \param tc A previously initialized theora comment structure
* \param comment A null-terminated string encoding the comment in the form
* "TAG=the value"
*
* Neither theora_comment_add() nor theora_comment_add_tag() support
* comments containing null values, although the bitstream format
* supports this. To add such comments you will need to manipulate
* the theora_comment structure directly.
**/
extern void theora_comment_add(theora_comment *tc, char *comment);
/**
* Add a comment to an initialized theora_comment structure.
* \param tc A previously initialized theora comment structure
* \param tag A null-terminated string containing the tag
* associated with the comment.
* \param value The corresponding value as a null-terminated string
*
* Neither theora_comment_add() nor theora_comment_add_tag() support
* comments containing null values, although the bitstream format
* supports this. To add such comments you will need to manipulate
* the theora_comment structure directly.
**/
extern void theora_comment_add_tag(theora_comment *tc,
char *tag, char *value);
/**
* Look up a comment value by tag.
* \param tc Tn initialized theora_comment structure
* \param tag The tag to look up
* \param count The instance of the tag. The same tag can appear multiple
* times, each with a distinct and ordered value, so an index
* is required to retrieve them all.
* \returns A pointer to the queried tag's value
* \retval NULL No matching tag is found
*
* \note Use theora_comment_query_count() to get the legal range for the
* count parameter.
**/
extern char *theora_comment_query(theora_comment *tc, char *tag, int count);
/** Look up the number of instances of a tag.
* \param tc An initialized theora_comment structure
* \param tag The tag to look up
* \returns The number on instances of a particular tag.
*
* Call this first when querying for a specific tag and then interate
* over the number of instances with separate calls to
* theora_comment_query() to retrieve all instances in order.
**/
extern int theora_comment_query_count(theora_comment *tc, char *tag);
/**
* Clear an allocated theora_comment struct so that it can be freed.
* \param tc An allocated theora_comment structure.
**/
extern void theora_comment_clear(theora_comment *tc);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _O_THEORA_H_ */
extern/vorbis/theora/theoradec.h
Vendored
-280
View File
@@ -1,280 +0,0 @@
/********************************************************************
* *
* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2003 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function:
last mod: $Id: theoradec.h 26239 2007-05-10 01:53:20Z gmaynard $
********************************************************************/
/**\file
* The <tt>libtheora</tt> C decoding API.*/
#if !defined(_O_THEORA_THEORADEC_H_)
# define _O_THEORA_THEORADEC_H_ (1)
# include <ogg/ogg.h>
# include "codec.h"
#if defined(__cplusplus)
extern "C" {
#endif
/**\name theora_decode_ctl() codes
* \anchor decctlcodes
* These are the available request codes for theora_decode_ctl().
* By convention, these are odd, to distinguish them from the
* \ref encctlcodes "encoder control codes".
* Keep any experimental or vendor-specific values above \c 0x8000.*/
/*@{*/
/**Gets the maximum post-processing level.
*
* \param[out] _buf int: The maximum post-processing level.
* \retval OC_FAULT \a _dec_ctx or \a _buf is <tt>NULL</tt>.
* \retval OC_EINVAL \a _buf_sz is not <tt>sizeof(int)</tt>.
* \retval OC_IMPL Not supported by this implementation.*/
#define OC_DECCTL_GET_PPLEVEL_MAX (1)
/**Sets the post-processing level.
* By default, post-processing is disabled.
*
* \param[in] _buf int: The new post-processing level.
* 0 to disable; larger values use more CPU.
* \retval OC_FAULT \a _dec_ctx or \a _buf is <tt>NULL</tt>.
* \retval OC_EINVAL \a _buf_sz is not <tt>sizeof(int)</tt>, or the
* post-processing level is out of bounds.
* The maximum post-processing level may be
* implementation-specific, and can be obtained via
* #OC_DECCTL_GET_PPLEVEL_MAX.
* \retval OC_IMPL Not supported by this implementation.*/
#define OC_DECCTL_SET_PPLEVEL (3)
/**Sets the granule position.
* Call this after a seek, before decoding the first frame, to ensure that the
* proper granule position is returned for all subsequent frames.
*
* \param[in] _buf <tt>ogg_int64_t</tt>: The granule position of the next
* frame.
* \retval OC_FAULT \a _dec_ctx or \a _buf is <tt>NULL</tt>.
* \retval OC_EINVAL \a _buf_sz is not <tt>sizeof(ogg_int64_t)</tt>, or the
* granule position is negative.*/
#define OC_DECCTL_SET_GRANPOS (5)
/**Sets the striped decode callback function.
* If set, this function will be called as each piece of a frame is fully
* decoded in theora_decode_packetin().
* You can pass in a #theora_stripe_callback with
* theora_stripe_callback#stripe_decoded set to <tt>NULL</tt> to disable the
* callbacks at any point.
*
* \param[in] _buf #theora_stripe_callback: The callback parameters.
* \retval OC_FAULT \a _dec_ctx or \a _buf is <tt>NULL</tt>.
* \retval OC_EINVAL \a _buf_sz is not
* <tt>sizeof(theora_stripe_callback)</tt>.*/
#define OC_DECCTL_SET_STRIPE_CB (7)
/*@}*/
/**A callback function for striped decode.
* This is a function pointer to an application-provided function that will be
* called each time a section of the image is fully decoded in
* theora_decode_packetin().
* This allows the application to process the section immediately, while it is
* still in cache.
* Note that the frame is decoded bottom to top, so \a _yfrag0 will steadily
* decrease with each call until it reaches 0, at which point the full frame
* is decoded.
* The number of fragment rows made available in each call depends on the pixel
* format and the number of post-processing filters enabled, and may not even
* be constant for the entire frame.
* If a non-<tt>NULL</tt> \a _granpos pointer is passed to
* theora_decode_packetin(), the granule position for the frame will be stored
* in it before the first callback is made.
* If an entire frame is dropped (a 0-byte packet), then no callbacks will be
* made at all for that frame.
* \param _ctx An application-provided context pointer.
* \param _buf The image buffer for the decoded frame.
* \param _yfrag0 The Y coordinate of the first row of 8x8 fragments
* decoded.
* Multiply this by 8 to obtain the pixel row number in the
* luma plane.
* If the chroma planes are subsampled in the Y direction,
* this will always be divisible by two.
* \param _yfrag_end The Y coordinate of the first row of 8x8 fragments past
* the newly decoded section.
* If the chroma planes are subsampled in the Y direction,
* this will always be divisible by two.
* I.e., this section contains fragment rows
* <tt>\a _yfrag0 ...\a _yfrag_end -1</tt>.*/
typedef void (*theora_stripe_decoded_func)(void *_ctx,theora_ycbcr_buffer _buf,
int _yfrag0,int _yfrag_end);
/**The striped decode callback data to pass to #OC_DECCTL_SET_STRIPE_CB.*/
typedef struct{
/**An application-provided context pointer.
* This will be passed back verbatim to the application.*/
void *ctx;
/**The callback function pointer.*/
theora_stripe_decoded_func stripe_decoded;
}theora_stripe_callback;
/**\name Decoder state
The following data structures are opaque, and their contents are not
publicly defined by this API.
Referring to their internals directly is unsupported, and may break without
warning.*/
/*@{*/
/**The decoder context.*/
typedef struct theora_dec_ctx theora_dec_ctx;
/**Setup information.
This contains auxiliary information (Huffman tables and quantization
parameters) decoded from the setup header by theora_decode_headerin() to be
passed to theora_decode_alloc().
It can be re-used to initialize any number of decoders, and can be freed
via theora_setup_free() at any time.*/
typedef struct theora_setup_info theora_setup_info;
/*@}*/
/**\defgroup decfuncs Functions for Decoding*/
/*@{*/
/**\name Functions for decoding
* You must link to <tt>libtheorabase</tt> and <tt>libtheoradec</tt> if you use
* any of the functions in this section.
*
* The functions are listed in the order they are used in a typical decode.
* The basic steps are:
* - Parse the header packets by repeatedly calling theora_decode_headerin().
* - Allocate a #theora_dec_ctx handle with theora_decode_alloc().
* - Call theora_setup_free() to free any memory used for codec setup
* information.
* - Perform any additional decoder configuration with theora_decode_ctl().
* - For each video data packet:
* - Submit the packet to the decoder via theora_decode_packetin().
* - Retrieve the uncompressed video data via theora_decode_ycbcr_out().
* - Call theora_decode_free() to release all decoder memory.*/
/*@{*/
/**Decodes the header packets of a Theora stream.
* This should be called on the initial packets of the stream, in succession,
* until it returns <tt>0</tt>, indicating that all headers have been
* processed, or an error is encountered.
* At least three header packets are required, and additional optional header
* packets may follow.
* This can be used on the first packet of any logical stream to determine if
* that stream is a Theora stream.
* \param _info A #theora_info structure to fill in.
* This must have been previously initialized with
* theora_info_init().
* The application may immediately begin using the contents of
* this structure after the first header is decoded, though it
* must continue to be passed in on all subsequent calls.
* \param _tc A #theora_comment structure to fill in.
* The application may immediately begin using the contents of
* this structure after the second header is decoded, though it
* must continue to be passed in on all subsequent calls.
* \param _setup Returns a pointer to additional, private setup information
* needed by the decoder.
* The contents of this pointer must be initialized to
* <tt>NULL</tt> on the first call, and the returned value must
* continue to be passed in on all subsequent calls.
* \param _op An <tt>ogg_packet</tt> structure which contains one of the
* initial packets of an Ogg logical stream.
* \return A positive value indicates that a Theora header was successfully
* processed.
* \retval 0 The first video data packet was encountered after all
* required header packets were parsed.
* The packet just passed in on this call should be saved
* and fed to theora_decode_packetin() to begin decoding
* video data.
* \retval OC_FAULT One of \a _info, \a _tc, or \a _setup was
* <tt>NULL</tt>.
* \retval OC_BADHEADER \a _op was <tt>NULL</tt>, the packet was not the next
* header packet in the expected sequence, or the format
* of the header data was invalid.
* \retval OC_VERSION The packet data was a Theora info header, but for a
* bitstream version not decodable with this version of
* <tt>libtheora</tt>.
* \retval OC_NOTFORMAT The packet was not a Theora header.
*/
extern int theora_decode_headerin(theora_info *_info,theora_comment *_tc,
theora_setup_info **_setup,ogg_packet *_op);
/**Allocates a decoder instance.
* \param _info A #theora_info struct filled via theora_decode_headerin().
* \param _setup A #theora_setup_info handle returned via
* theora_decode_headerin().
* \return The initialized #theora_dec_ctx handle.
* \retval NULL If the decoding parameters were invalid.*/
extern theora_dec_ctx *theora_decode_alloc(const theora_info *_info,
const theora_setup_info *_setup);
/**Releases all storage used for the decoder setup information.
* This should be called after you no longer want to create any decoders for
* a stream whose headers you have parsed with theora_decode_headerin().
* \param _setup The setup information to free.
* This can safely be <tt>NULL</tt>.*/
extern void theora_setup_free(theora_setup_info *_setup);
/**Encoder control function.
* This is used to provide advanced control the decoding process.
* \param _dec A #theora_dec_ctx handle.
* \param _req The control code to process.
* See \ref decctlcodes "the list of available control codes"
* for details.
* \param _buf The parameters for this control code.
* \param _buf_sz The size of the parameter buffer.*/
extern int theora_decode_ctl(theora_dec_ctx *_dec,int _req,void *_buf,
size_t _buf_sz);
/**Submits a packet containing encoded video data to the decoder.
* \param _dec A #theora_dec_ctx handle.
* \param _op An <tt>ogg_packet</tt> containing encoded video data.
* \param _granpos Returns the granule position of the decoded packet.
* If non-<tt>NULL</tt>, the granule position for this specific
* packet is stored in this location.
* This is computed incrementally from previously decoded
* packets.
* After a seek, the correct granule position must be set via
* #OC_DECCTL_SET_GRANPOS for this to work properly.
* \retval 0 Success.
* \retval OC_FAULT \a _dec or _op was <tt>NULL</tt>.
* \retval OC_BADPACKET \a _op does not contain encoded video data.
* \retval OC_IMPL The video data uses bitstream features which this
* library does not support.*/
extern int theora_decode_packetin(theora_dec_ctx *_dec,const ogg_packet *_op,
ogg_int64_t *_granpos);
/**Outputs the next available frame of decoded Y'CbCr data.
* If a striped decode callback has been set with #OC_DECCTL_SET_STRIPE_CB,
* then the application does not need to call this function.
* \param _dec A #theora_dec_ctx handle.
* \param _ycbcr A video buffer structure to fill in.
* <tt>libtheora</tt> will fill in all the members of this
* structure, including the pointers to the uncompressed video
* data.
* The memory for this video data is owned by
* <tt>libtheora</tt>.
* It may be freed or overwritten without notification when
* subsequent frames are decoded.
* \retval 0 Success
*/
extern int theora_decode_ycbcr_out(theora_dec_ctx *_dec,
theora_ycbcr_buffer _ycbcr);
/**Frees an allocated decoder instance.
* \param _dec A #theora_dec_ctx handle.*/
extern void theora_decode_free(theora_dec_ctx *_dec);
/*@}*/
/*@}*/
#if defined(__cplusplus)
}
#endif
#endif
extern/vorbis/win32/theora_static.lib
Vendored
BIN
View File
Binary file not shown.