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| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2008 BBC, Anuradha Suraparaju |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | /** |
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| 22 | * @file |
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| 23 | * data structures common to libschroedinger decoder and encoder |
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| 24 | */ |
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| 25 | |||
| 26 | #ifndef AVCODEC_LIBSCHROEDINGER_H |
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| 27 | #define AVCODEC_LIBSCHROEDINGER_H |
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| 28 | |||
| 29 | #include |
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| 30 | #include |
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| 31 | |||
| 32 | #include "avcodec.h" |
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| 33 | |||
| 34 | typedef struct SchroVideoFormatInfo { |
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| 35 | uint16_t width; |
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| 36 | uint16_t height; |
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| 37 | uint16_t frame_rate_num; |
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| 38 | uint16_t frame_rate_denom; |
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| 39 | } SchroVideoFormatInfo; |
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| 40 | |||
| 41 | /** |
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| 42 | * contains a single encoded frame returned from Dirac or Schroedinger |
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| 43 | */ |
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| 44 | typedef struct FFSchroEncodedFrame { |
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| 45 | /** encoded frame data */ |
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| 46 | uint8_t *p_encbuf; |
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| 47 | |||
| 48 | /** encoded frame size */ |
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| 49 | uint32_t size; |
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| 50 | |||
| 51 | /** encoded frame number. Will be used as pts */ |
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| 52 | uint32_t frame_num; |
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| 53 | |||
| 54 | /** key frame flag. 1 : is key frame , 0 : in not key frame */ |
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| 55 | uint16_t key_frame; |
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| 56 | } FFSchroEncodedFrame; |
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| 57 | |||
| 58 | /** |
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| 59 | * queue element |
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| 60 | */ |
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| 61 | typedef struct FFSchroQueueElement { |
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| 62 | /** Data to be stored in queue*/ |
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| 63 | void *data; |
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| 64 | /** Pointer to next element queue */ |
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| 65 | struct FFSchroQueueElement *next; |
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| 66 | } FFSchroQueueElement; |
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| 67 | |||
| 68 | |||
| 69 | /** |
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| 70 | * A simple queue implementation used in libschroedinger |
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| 71 | */ |
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| 72 | typedef struct FFSchroQueue { |
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| 73 | /** Pointer to head of queue */ |
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| 74 | FFSchroQueueElement *p_head; |
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| 75 | /** Pointer to tail of queue */ |
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| 76 | FFSchroQueueElement *p_tail; |
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| 77 | /** Queue size*/ |
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| 78 | int size; |
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| 79 | } FFSchroQueue; |
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| 80 | |||
| 81 | /** |
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| 82 | * Initialise the queue |
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| 83 | */ |
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| 84 | void ff_schro_queue_init(FFSchroQueue *queue); |
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| 85 | |||
| 86 | /** |
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| 87 | * Add an element to the end of the queue |
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| 88 | */ |
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| 89 | int ff_schro_queue_push_back(FFSchroQueue *queue, void *p_data); |
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| 90 | |||
| 91 | /** |
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| 92 | * Return the first element in the queue |
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| 93 | */ |
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| 94 | void *ff_schro_queue_pop(FFSchroQueue *queue); |
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| 95 | |||
| 96 | /** |
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| 97 | * Free the queue resources. free_func is a function supplied by the caller to |
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| 98 | * free any resources allocated by the caller. The data field of the queue |
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| 99 | * element is passed to it. |
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| 100 | */ |
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| 101 | void ff_schro_queue_free(FFSchroQueue *queue, void (*free_func)(void *)); |
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| 102 | |||
| 103 | static const struct { |
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| 104 | enum AVPixelFormat ff_pix_fmt; |
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| 105 | SchroChromaFormat schro_pix_fmt; |
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| 106 | SchroFrameFormat schro_frame_fmt; |
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| 107 | } schro_pixel_format_map[] = { |
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| 108 | { AV_PIX_FMT_YUV420P, SCHRO_CHROMA_420, SCHRO_FRAME_FORMAT_U8_420 }, |
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| 109 | { AV_PIX_FMT_YUV422P, SCHRO_CHROMA_422, SCHRO_FRAME_FORMAT_U8_422 }, |
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| 110 | { AV_PIX_FMT_YUV444P, SCHRO_CHROMA_444, SCHRO_FRAME_FORMAT_U8_444 }, |
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| 111 | }; |
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| 112 | |||
| 113 | /** |
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| 114 | * Returns the video format preset matching the input video dimensions and |
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| 115 | * time base. |
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| 116 | */ |
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| 117 | SchroVideoFormatEnum ff_get_schro_video_format_preset (AVCodecContext *avctx); |
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| 118 | |||
| 119 | /** |
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| 120 | * Sets the Schroedinger frame format corresponding to the Schro chroma format |
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| 121 | * passed. Returns 0 on success, -1 on failure. |
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| 122 | */ |
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| 123 | int ff_get_schro_frame_format(SchroChromaFormat schro_chroma_fmt, |
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| 124 | SchroFrameFormat *schro_frame_fmt); |
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| 125 | |||
| 126 | /** |
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| 127 | * Create a Schro frame based on the dimensions and frame format |
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| 128 | * passed. Returns a pointer to a frame on success, NULL on failure. |
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| 129 | */ |
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| 130 | SchroFrame *ff_create_schro_frame(AVCodecContext *avctx, |
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| 131 | SchroFrameFormat schro_frame_fmt); |
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| 132 | |||
| 133 | #endif /* AVCODEC_LIBSCHROEDINGER_H */ |