libtheora: theoradec.h Source File

libtheora 1.2.0

theoradec.h
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1/********************************************************************
2 * *
3 * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
7 * *
8 * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
9 * by the Xiph.Org Foundation https://www.xiph.org/ *
10 * *
11 ********************************************************************
12
13 function:
14
15 ********************************************************************/
16
19
20#if !defined(OGG_THEORA_THEORADEC_HEADER)
21# define OGG_THEORA_THEORADEC_HEADER (1)
22# include <stddef.h>
23# include <ogg/ogg.h>
24# include "codec.h"
25
26#if defined(__cplusplus)
27extern "C" {
28#endif
29
30
31
49#define TH_DECCTL_GET_PPLEVEL_MAX (1)
66#define TH_DECCTL_SET_PPLEVEL (3)
78#define TH_DECCTL_SET_GRANPOS (5)
92#define TH_DECCTL_SET_STRIPE_CB (7)
93
96#define TH_DECCTL_SET_TELEMETRY_MBMODE (9)
99#define TH_DECCTL_SET_TELEMETRY_MV (11)
102#define TH_DECCTL_SET_TELEMETRY_QI (13)
105#define TH_DECCTL_SET_TELEMETRY_BITS (15)
107
108
109
141 typedef void (*th_stripe_decoded_func)(void *_ctx,th_ycbcr_buffer _buf,
142 int _yfrag0,int _yfrag_end);
143
145 typedef struct{
148 void *ctx;
150 th_stripe_decoded_func stripe_decoded;
151}th_stripe_callback;
152
153
154
162 typedef struct th_dec_ctx th_dec_ctx;
169 typedef struct th_setup_info th_setup_info;
171
172
173
234 extern int th_decode_headerin(th_info *_info,th_comment *_tc,
235 th_setup_info **_setup,ogg_packet *_op);
258 extern th_dec_ctx *th_decode_alloc(const th_info *_info,
259 const th_setup_info *_setup);
265 extern void th_setup_free(th_setup_info *_setup);
277 extern int th_decode_ctl(th_dec_ctx *_dec,int _req,void *_buf,
278 size_t _buf_sz);
301 extern int th_decode_packetin(th_dec_ctx *_dec,const ogg_packet *_op,
302 ogg_int64_t *_granpos);
318 extern int th_decode_ycbcr_out(th_dec_ctx *_dec,
319 th_ycbcr_buffer _ycbcr);
322 extern void th_decode_free(th_dec_ctx *_dec);
325
326
327
328#if defined(__cplusplus)
329}
330#endif
331
332#endif /* OGG_THEORA_THEORADEC_HEADER */
codec.h
The shared libtheoradec and libtheoraenc C API.
th_ycbcr_buffer
th_img_plane th_ycbcr_buffer[3]
A complete image buffer for an uncompressed frame.
Definition codec.h:170
th_comment
The comment information.
Definition codec.h:325
th_info
Theora bitstream information.
Definition codec.h:206
th_stripe_callback
The striped decode callback data to pass to TH_DECCTL_SET_STRIPE_CB.
Definition theoradec.h:145
th_stripe_callback::stripe_decoded
th_stripe_decoded_func stripe_decoded
The callback function pointer.
Definition theoradec.h:150
th_stripe_callback::ctx
void * ctx
An application-provided context pointer.
Definition theoradec.h:148
th_decode_headerin
int th_decode_headerin(th_info *_info, th_comment *_tc, th_setup_info **_setup, ogg_packet *_op)
Decodes the header packets of a Theora stream.
th_decode_ctl
int th_decode_ctl(th_dec_ctx *_dec, int _req, void *_buf, size_t _buf_sz)
Decoder control function.
th_decode_packetin
int th_decode_packetin(th_dec_ctx *_dec, const ogg_packet *_op, ogg_int64_t *_granpos)
Submits a packet containing encoded video data to the decoder.
th_decode_alloc
th_dec_ctx * th_decode_alloc(const th_info *_info, const th_setup_info *_setup)
Allocates a decoder instance.
th_dec_ctx
struct th_dec_ctx th_dec_ctx
The decoder context.
Definition theoradec.h:162
th_decode_ycbcr_out
int th_decode_ycbcr_out(th_dec_ctx *_dec, th_ycbcr_buffer _ycbcr)
Outputs the next available frame of decoded Y'CbCr data.
th_stripe_decoded_func
void(* th_stripe_decoded_func)(void *_ctx, th_ycbcr_buffer _buf, int _yfrag0, int _yfrag_end)
A callback function for striped decode.
Definition theoradec.h:141
th_setup_info
struct th_setup_info th_setup_info
Setup information.
Definition theoradec.h:169
th_setup_free
void th_setup_free(th_setup_info *_setup)
Releases all storage used for the decoder setup information.
th_decode_free
void th_decode_free(th_dec_ctx *_dec)
Frees an allocated decoder instance.