[5937] | 1 | /* |
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| 2 | orxonox - the future of 3D-vertical-scrollers |
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| 3 | |
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| 4 | Copyright (C) 2004 orx |
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| 5 | |
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| 6 | This program is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 2, or (at your option) |
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| 9 | any later version. |
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| 10 | |
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| 11 | ### File Specific: |
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| 12 | main-programmer: David Hasenfratz, Stephan Lienhard |
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| 13 | co-programmer: |
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| 14 | */ |
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| 15 | |
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| 16 | |
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| 17 | |
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| 18 | /* this is for debug output. It just says, that all calls to PRINT() belong to the DEBUG_MODULE_MEDIA module |
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| 19 | For more information refere to https://www.orxonox.net/cgi-bin/trac.cgi/wiki/DebugOutput |
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| 20 | */ |
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| 21 | #define DEBUG_MODULE_MEDIA |
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| 22 | |
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| 23 | |
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| 24 | /* include your own header */ |
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| 25 | #include "media_container.h" |
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| 26 | |
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| 27 | /* header for debug output */ |
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| 28 | #include "debug.h" |
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| 29 | |
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| 30 | |
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| 31 | /** |
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| 32 | * Default constructor |
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| 33 | */ |
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[5939] | 34 | MediaContainer::MediaContainer(const char* filename) |
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[5937] | 35 | { |
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[6339] | 36 | // set the class id for the base object |
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| 37 | this->setClassID(CL_MEDIA_CONTAINER, "MediaContainer"); |
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[5975] | 38 | |
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[6339] | 39 | fps = 0; |
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| 40 | |
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[5975] | 41 | if (filename != NULL) |
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[5962] | 42 | this->loadMedia(filename); |
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[6289] | 43 | } |
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[5962] | 44 | |
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[6289] | 45 | MediaContainer::MediaContainer() |
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| 46 | { |
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[6339] | 47 | // set the class id for the base object |
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| 48 | this->setClassID(CL_MEDIA_CONTAINER, "MediaContainer"); |
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| 49 | |
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| 50 | fps = 0; |
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[5937] | 51 | } |
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| 52 | |
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| 53 | /** |
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| 54 | * Default destructor |
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| 55 | */ |
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| 56 | MediaContainer::~MediaContainer() |
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| 57 | { |
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[6339] | 58 | if (glIsTexture(texture)) |
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| 59 | glDeleteTextures(1, &texture); |
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[6163] | 60 | SDL_FreeSurface(surface); |
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[6149] | 61 | |
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[6068] | 62 | // Free the RGB image |
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| 63 | delete [] buffer; |
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| 64 | av_free(RGB_frame); |
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[5937] | 65 | |
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[6339] | 66 | // Free the frame |
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[6003] | 67 | av_free(frame); |
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| 68 | |
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[6339] | 69 | // Close the codec |
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[6003] | 70 | avcodec_close(codec_context); |
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| 71 | |
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[6339] | 72 | // Close the video file |
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[6003] | 73 | av_close_input_file(format_context); |
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[5937] | 74 | } |
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| 75 | |
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[6339] | 76 | void MediaContainer::loadMedia(const char* filename) |
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[6290] | 77 | { |
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[6339] | 78 | // register all formats and codecs |
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[6290] | 79 | av_register_all(); |
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| 80 | |
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[6339] | 81 | // Open video file |
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| 82 | if (av_open_input_file(&format_context, filename, NULL, 0, NULL) !=0 ) |
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| 83 | PRINTF(1)("Could not open %s\n", filename); |
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[6290] | 84 | |
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[6339] | 85 | // Retrieve stream information |
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| 86 | if (av_find_stream_info(format_context) < 0) |
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| 87 | PRINTF(1)("Could not find stream information in %s\n", filename); |
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| 88 | |
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| 89 | // Find the first video stream and take it |
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| 90 | video_stream = -1; |
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| 91 | for(int i = 0; i < format_context->nb_streams; i++) |
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[6323] | 92 | { |
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[6339] | 93 | // NOTE: different code for the 0.4.9-pre1 release of ffmpeg (tardis) |
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| 94 | // if(format_context->streams[i]->codec.codec_type == CODEC_TYPE_VIDEO) |
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| 95 | if(format_context->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO) |
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| 96 | { |
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| 97 | video_stream = i; |
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| 98 | break; |
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| 99 | } |
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[6323] | 100 | } |
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[6339] | 101 | |
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| 102 | if(video_stream == -1) |
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| 103 | PRINTF(1)("Could not find a video stream in %s\n", filename); |
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| 104 | |
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| 105 | // Get a pointer to the codec context for the video stream |
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| 106 | // NOTE: different code for the 0.4.9-pre1 release of ffmpeg (tardis) |
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| 107 | // codec_context = &format_context->streams[video_stream]->codec; |
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| 108 | codec_context = format_context->streams[video_stream]->codec; |
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| 109 | |
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| 110 | // Find the decoder for the video stream |
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| 111 | codec = avcodec_find_decoder(codec_context->codec_id); |
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| 112 | if (codec == NULL) |
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| 113 | PRINTF(1)("Could not find codec\n"); |
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| 114 | |
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| 115 | // Open codec |
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| 116 | if (avcodec_open(codec_context, codec) < 0) |
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| 117 | PRINTF(1)("Could not open codec\n"); |
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| 118 | |
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| 119 | // Allocate video frame |
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| 120 | frame = avcodec_alloc_frame(); |
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| 121 | RGB_frame = avcodec_alloc_frame(); |
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| 122 | |
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| 123 | // Determine required buffer size and allocate buffer |
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| 124 | num_bytes = avpicture_get_size(PIX_FMT_RGB24, codec_context->width, codec_context->height); |
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| 125 | buffer=new uint8_t[num_bytes]; |
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| 126 | |
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| 127 | // Assign appropriate parts of buffer to image planes in pFrameRGB |
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| 128 | avpicture_fill((AVPicture *)RGB_frame, buffer, PIX_FMT_RGB24, codec_context->width, codec_context->height); |
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| 129 | |
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| 130 | // Calculate fps |
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| 131 | fps = av_q2d(format_context->streams[video_stream]->r_frame_rate); |
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| 132 | |
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| 133 | // read the frames and save them in a sequence as textures |
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| 134 | this->loadFrames(); |
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[5937] | 135 | } |
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| 136 | |
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[6339] | 137 | double MediaContainer::getFPS() |
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| 138 | { |
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| 139 | return this->fps; |
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| 140 | } |
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| 141 | |
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| 142 | void MediaContainer::loadFrames() |
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| 143 | { |
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[6350] | 144 | // empty texture list |
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| 145 | this->clearLists(); |
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| 146 | |
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[6339] | 147 | // go to the begin of the video |
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| 148 | av_seek_frame(format_context, video_stream, 0, AVSEEK_FLAG_BACKWARD); |
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| 149 | |
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| 150 | // get all the frames and save them in the sequence |
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| 151 | while(this->addFrame(this->getNextFrame()) != NULL); |
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| 152 | } |
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| 153 | |
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| 154 | |
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[6317] | 155 | GLuint MediaContainer::getNextFrame() |
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[5937] | 156 | { |
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[6350] | 157 | //if (glIsTexture(texture)) |
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| 158 | // glDeleteTextures(1, &texture); |
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| 159 | |
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[6339] | 160 | // get next frame |
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[6068] | 161 | if(av_read_frame(format_context, &packet) >= 0) |
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| 162 | { |
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[6339] | 163 | // Is this a packet from the video stream? |
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[6068] | 164 | if(packet.stream_index == video_stream) |
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| 165 | { |
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| 166 | int frame_finished; |
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| 167 | // Decode video frame |
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[6163] | 168 | avcodec_decode_video(codec_context, frame, &frame_finished, |
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| 169 | packet.data, packet.size); |
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[6003] | 170 | |
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[6317] | 171 | // Free the packet that was allocated by av_read_frame |
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| 172 | av_free_packet(&packet); |
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| 173 | |
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[6068] | 174 | // Did we get a video frame? |
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| 175 | if(frame_finished) |
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| 176 | { |
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[6149] | 177 | // Conversion from YUV to RGB |
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| 178 | // Most codecs return images in YUV 420 format |
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| 179 | // (one luminance and two chrominance channels, with the chrominance |
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| 180 | // channels samples at half the spatial resolution of the luminance channel) |
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[6163] | 181 | img_convert((AVPicture*)RGB_frame, PIX_FMT_RGB24, (AVPicture*)frame, |
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| 182 | codec_context->pix_fmt, codec_context->width, codec_context->height); |
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[6094] | 183 | |
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[6112] | 184 | data = 0; |
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| 185 | data = new uint8_t[codec_context->width*codec_context->height*3*sizeof(uint8_t)]; |
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| 186 | for(int i = 0; i < codec_context->height; i++) |
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[6339] | 187 | memcpy(&data[i*codec_context->width*3], |
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| 188 | ((AVPicture*)RGB_frame)->data[0]+i * |
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| 189 | ((AVPicture*)RGB_frame)->linesize[0], |
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| 190 | codec_context->width*sizeof(uint8_t)*3); |
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[6112] | 191 | |
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[6163] | 192 | surface = SDL_CreateRGBSurfaceFrom(data, codec_context->width, |
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| 193 | codec_context->height,24, |
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| 194 | codec_context->width*sizeof(uint8_t)*3, |
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[6339] | 195 | #if SDL_BYTEORDER == SDL_LIL_ENDIAN // OpenGL RGBA masks |
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[6163] | 196 | 0x000000FF, |
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| 197 | 0x0000FF00, |
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| 198 | 0x00FF0000, |
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| 199 | 0 |
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| 200 | #else |
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| 201 | 0xFF000000, |
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| 202 | 0x00FF0000, |
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| 203 | 0x0000FF00, |
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| 204 | 0 |
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| 205 | #endif |
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| 206 | ); |
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[6112] | 207 | |
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[6339] | 208 | // Create an OpenGL texture from the surface |
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| 209 | glGenTextures(1, &texture); |
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| 210 | glBindTexture(GL_TEXTURE_2D, texture); |
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| 211 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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| 212 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
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| 213 | // create the texture |
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| 214 | glTexImage2D(GL_TEXTURE_2D, |
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| 215 | 0, |
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| 216 | GL_RGB, |
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| 217 | surface->w, surface->h, |
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| 218 | 0, |
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| 219 | GL_RGB, |
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| 220 | GL_UNSIGNED_BYTE, |
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| 221 | surface->pixels); |
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| 222 | // build the MipMaps |
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| 223 | gluBuild2DMipmaps(GL_TEXTURE_2D, |
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| 224 | GL_RGB, |
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| 225 | surface->w, |
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| 226 | surface->h, |
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| 227 | GL_RGB, |
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| 228 | GL_UNSIGNED_BYTE, |
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| 229 | surface->pixels); |
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| 230 | glBindTexture(GL_TEXTURE_2D, 0); |
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| 231 | |
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[6317] | 232 | return texture; |
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[6068] | 233 | } |
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[6339] | 234 | else |
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| 235 | { |
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| 236 | av_free_packet(&packet); |
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| 237 | this->getNextFrame(); |
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| 238 | } |
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[6068] | 239 | } |
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[6317] | 240 | else |
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| 241 | { |
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| 242 | av_free_packet(&packet); |
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| 243 | this->getNextFrame(); |
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| 244 | } |
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[6068] | 245 | } |
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| 246 | else |
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| 247 | return NULL; |
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| 248 | } |
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