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1 | /* |
2 | * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com > | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | /** | |
22 | * @file | |
23 | * data structures common to libschroedinger decoder and encoder | |
24 | */ | |
25 | ||
26 | #ifndef AVCODEC_LIBSCHROEDINGER_H | |
27 | #define AVCODEC_LIBSCHROEDINGER_H | |
28 | ||
29 | #include <schroedinger/schrobitstream.h> | |
30 | #include <schroedinger/schroframe.h> | |
31 | ||
32 | #include "avcodec.h" | |
33 | ||
34 | typedef struct SchroVideoFormatInfo { | |
35 | uint16_t width; | |
36 | uint16_t height; | |
37 | uint16_t frame_rate_num; | |
38 | uint16_t frame_rate_denom; | |
39 | } SchroVideoFormatInfo; | |
40 | ||
41 | /** | |
42 | * contains a single encoded frame returned from Dirac or Schroedinger | |
43 | */ | |
44 | typedef struct FFSchroEncodedFrame { | |
45 | /** encoded frame data */ | |
46 | uint8_t *p_encbuf; | |
47 | ||
48 | /** encoded frame size */ | |
49 | uint32_t size; | |
50 | ||
51 | /** encoded frame number. Will be used as pts */ | |
52 | uint32_t frame_num; | |
53 | ||
54 | /** key frame flag. 1 : is key frame , 0 : in not key frame */ | |
55 | uint16_t key_frame; | |
56 | } FFSchroEncodedFrame; | |
57 | ||
58 | /** | |
59 | * queue element | |
60 | */ | |
61 | typedef struct FFSchroQueueElement { | |
62 | /** Data to be stored in queue*/ | |
63 | void *data; | |
64 | /** Pointer to next element queue */ | |
65 | struct FFSchroQueueElement *next; | |
66 | } FFSchroQueueElement; | |
67 | ||
68 | ||
69 | /** | |
70 | * A simple queue implementation used in libschroedinger | |
71 | */ | |
72 | typedef struct FFSchroQueue { | |
73 | /** Pointer to head of queue */ | |
74 | FFSchroQueueElement *p_head; | |
75 | /** Pointer to tail of queue */ | |
76 | FFSchroQueueElement *p_tail; | |
77 | /** Queue size*/ | |
78 | int size; | |
79 | } FFSchroQueue; | |
80 | ||
81 | /** | |
82 | * Initialise the queue | |
83 | */ | |
84 | void ff_schro_queue_init(FFSchroQueue *queue); | |
85 | ||
86 | /** | |
87 | * Add an element to the end of the queue | |
88 | */ | |
89 | int ff_schro_queue_push_back(FFSchroQueue *queue, void *p_data); | |
90 | ||
91 | /** | |
92 | * Return the first element in the queue | |
93 | */ | |
94 | void *ff_schro_queue_pop(FFSchroQueue *queue); | |
95 | ||
96 | /** | |
97 | * Free the queue resources. free_func is a function supplied by the caller to | |
98 | * free any resources allocated by the caller. The data field of the queue | |
99 | * element is passed to it. | |
100 | */ | |
101 | void ff_schro_queue_free(FFSchroQueue *queue, void (*free_func)(void *)); | |
102 | ||
103 | static const struct { | |
104 | enum AVPixelFormat ff_pix_fmt; | |
105 | SchroChromaFormat schro_pix_fmt; | |
106 | SchroFrameFormat schro_frame_fmt; | |
107 | } schro_pixel_format_map[] = { | |
108 | { AV_PIX_FMT_YUV420P, SCHRO_CHROMA_420, SCHRO_FRAME_FORMAT_U8_420 }, | |
109 | { AV_PIX_FMT_YUV422P, SCHRO_CHROMA_422, SCHRO_FRAME_FORMAT_U8_422 }, | |
110 | { AV_PIX_FMT_YUV444P, SCHRO_CHROMA_444, SCHRO_FRAME_FORMAT_U8_444 }, | |
111 | }; | |
112 | ||
113 | /** | |
114 | * Returns the video format preset matching the input video dimensions and | |
115 | * time base. | |
116 | */ | |
117 | SchroVideoFormatEnum ff_get_schro_video_format_preset (AVCodecContext *avctx); | |
118 | ||
119 | /** | |
120 | * Sets the Schroedinger frame format corresponding to the Schro chroma format | |
121 | * passed. Returns 0 on success, -1 on failure. | |
122 | */ | |
123 | int ff_get_schro_frame_format(SchroChromaFormat schro_chroma_fmt, | |
124 | SchroFrameFormat *schro_frame_fmt); | |
125 | ||
126 | /** | |
127 | * Create a Schro frame based on the dimensions and frame format | |
128 | * passed. Returns a pointer to a frame on success, NULL on failure. | |
129 | */ | |
130 | SchroFrame *ff_create_schro_frame(AVCodecContext *avctx, | |
131 | SchroFrameFormat schro_frame_fmt); | |
132 | ||
133 | #endif /* AVCODEC_LIBSCHROEDINGER_H */ |