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 34typedef 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*/ 44typedef 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*/ 61typedef 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*/ 72typedef 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*/ 84void ff_schro_queue_init(FFSchroQueue *queue); 85 86/** 87* Add an element to the end of the queue 88*/ 89int ff_schro_queue_push_back(FFSchroQueue *queue, void *p_data); 90 91/** 92* Return the first element in the queue 93*/ 94void *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*/ 101void ff_schro_queue_free(FFSchroQueue *queue, void (*free_func)(void *)); 102 103static 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*/ 117SchroVideoFormatEnum 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*/ 123int 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*/ 130SchroFrame *ff_create_schro_frame(AVCodecContext *avctx, 131 SchroFrameFormat schro_frame_fmt); 132 133#endif /* AVCODEC_LIBSCHROEDINGER_H */ 134