blob: 12fe57c7f17721710ad15e1c1c1f97d6522fe7ca
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 */ |
134 |