[6a4cdcb6] | 1 | // |
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| 2 | // moviemaker.cc |
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| 3 | // |
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| 4 | // Class for writing movies from Aven. |
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| 5 | // |
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[091069f] | 6 | // Copyright (C) 2004,2011 Olly Betts |
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[6a4cdcb6] | 7 | // |
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| 8 | // This program is free software; you can redistribute it and/or modify |
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| 9 | // it under the terms of the GNU General Public License as published by |
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| 10 | // the Free Software Foundation; either version 2 of the License, or |
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| 11 | // (at your option) any later version. |
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| 12 | // |
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| 13 | // This program is distributed in the hope that it will be useful, |
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| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | // GNU General Public License for more details. |
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| 17 | // |
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| 18 | // You should have received a copy of the GNU General Public License |
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| 19 | // along with this program; if not, write to the Free Software |
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[ecbc6c18] | 20 | // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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[6a4cdcb6] | 21 | // |
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| 22 | |
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[cc9e7a06] | 23 | /* Based on output-example.c: |
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| 24 | * |
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| 25 | * Libavformat API example: Output a media file in any supported |
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| 26 | * libavformat format. The default codecs are used. |
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| 27 | * |
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| 28 | * Copyright (c) 2003 Fabrice Bellard |
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| 29 | * |
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| 30 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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| 31 | * of this software and associated documentation files (the "Software"), to deal |
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| 32 | * in the Software without restriction, including without limitation the rights |
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| 33 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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| 34 | * copies of the Software, and to permit persons to whom the Software is |
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| 35 | * furnished to do so, subject to the following conditions: |
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| 36 | * |
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| 37 | * The above copyright notice and this permission notice shall be included in |
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| 38 | * all copies or substantial portions of the Software. |
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| 39 | * |
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| 40 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 41 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 42 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 43 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 44 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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| 45 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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| 46 | * THE SOFTWARE. |
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| 47 | */ |
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| 48 | |
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[6a4cdcb6] | 49 | #ifdef HAVE_CONFIG_H |
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| 50 | #include <config.h> |
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| 51 | #endif |
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| 52 | |
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[cc9e7a06] | 53 | #define __STDC_CONSTANT_MACROS |
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| 54 | |
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[1805274] | 55 | #include <assert.h> |
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[6a4cdcb6] | 56 | #include <stdlib.h> |
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| 57 | #include <string.h> |
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| 58 | |
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| 59 | #include "moviemaker.h" |
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| 60 | |
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[cc9e7a06] | 61 | #ifdef HAVE_LIBAVFORMAT_AVFORMAT_H |
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| 62 | extern "C" { |
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| 63 | #include "libavformat/avformat.h" |
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[9e516d0d] | 64 | #include "libswscale/swscale.h" |
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[cc9e7a06] | 65 | } |
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| 66 | #ifndef AV_PKT_FLAG_KEY |
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| 67 | # define AV_PKT_FLAG_KEY PKT_FLAG_KEY |
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| 68 | #endif |
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[6a4cdcb6] | 69 | #endif |
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| 70 | |
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[091069f] | 71 | enum { |
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| 72 | MOVIE_NO_SUITABLE_FORMAT = 1, |
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| 73 | MOVIE_AUDIO_ONLY, |
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| 74 | MOVIE_FILENAME_TOO_LONG, |
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| 75 | MOVIE_NOT_ENABLED |
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| 76 | }; |
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| 77 | |
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[1805274] | 78 | const int OUTBUF_SIZE = 200000; |
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[6a4cdcb6] | 79 | |
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[1805274] | 80 | MovieMaker::MovieMaker() |
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[091069f] | 81 | : oc(0), st(0), frame(0), outbuf(0), pixels(0), sws_ctx(0), averrno(0) |
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[6a4cdcb6] | 82 | { |
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[cc9e7a06] | 83 | #ifdef HAVE_LIBAVFORMAT_AVFORMAT_H |
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[6a4cdcb6] | 84 | static bool initialised_ffmpeg = false; |
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[1805274] | 85 | if (initialised_ffmpeg) return; |
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[6a4cdcb6] | 86 | |
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[1805274] | 87 | // FIXME: register only the codec(s) we want to use... |
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| 88 | av_register_all(); |
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[6a4cdcb6] | 89 | |
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[1805274] | 90 | initialised_ffmpeg = true; |
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| 91 | #endif |
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| 92 | } |
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| 93 | |
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| 94 | bool MovieMaker::Open(const char *fnm, int width, int height) |
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| 95 | { |
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[cc9e7a06] | 96 | #ifdef HAVE_LIBAVFORMAT_AVFORMAT_H |
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[1805274] | 97 | AVOutputFormat * fmt = guess_format(NULL, fnm, NULL); |
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| 98 | if (!fmt) { |
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| 99 | // We couldn't deduce the output format from file extension so default |
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| 100 | // to MPEG. |
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| 101 | fmt = guess_format("mpeg", NULL, NULL); |
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| 102 | if (!fmt) { |
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[091069f] | 103 | averrno = MOVIE_NO_SUITABLE_FORMAT; |
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[1805274] | 104 | return false; |
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| 105 | } |
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| 106 | } |
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| 107 | if (fmt->video_codec == CODEC_ID_NONE) { |
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[091069f] | 108 | averrno = MOVIE_AUDIO_ONLY; |
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[1805274] | 109 | return false; |
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[6a4cdcb6] | 110 | } |
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| 111 | |
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[1805274] | 112 | // Allocate the output media context. |
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[6ed625e] | 113 | oc = avformat_alloc_context(); |
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[1805274] | 114 | if (!oc) { |
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[091069f] | 115 | averrno = AVERROR_NOMEM; |
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[1805274] | 116 | return false; |
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[6a4cdcb6] | 117 | } |
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[1805274] | 118 | oc->oformat = fmt; |
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| 119 | if (strlen(fnm) >= sizeof(oc->filename)) { |
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[091069f] | 120 | averrno = MOVIE_FILENAME_TOO_LONG; |
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[1805274] | 121 | return false; |
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| 122 | } |
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| 123 | strcpy(oc->filename, fnm); |
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[6a4cdcb6] | 124 | |
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[1805274] | 125 | // Add the video stream using the default format codec. |
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| 126 | st = av_new_stream(oc, 0); |
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| 127 | if (!st) { |
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[091069f] | 128 | averrno = AVERROR_NOMEM; |
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[1805274] | 129 | return false; |
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[6a4cdcb6] | 130 | } |
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| 131 | |
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[1805274] | 132 | // Initialise the code. |
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[cc9e7a06] | 133 | AVCodecContext *c = st->codec; |
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[1805274] | 134 | c->codec_id = fmt->video_codec; |
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| 135 | c->codec_type = CODEC_TYPE_VIDEO; |
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[6a4cdcb6] | 136 | |
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| 137 | // Set sample parameters. |
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| 138 | c->bit_rate = 400000; |
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[1805274] | 139 | c->width = width; |
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| 140 | c->height = height; |
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[cc9e7a06] | 141 | c->time_base.num = 1; |
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| 142 | c->time_base.den = 25; // Frames per second. |
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[1805274] | 143 | c->gop_size = 12; // One intra frame every twelve frames. |
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[6a4cdcb6] | 144 | c->pix_fmt = PIX_FMT_YUV420P; |
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[1805274] | 145 | // B frames are backwards predicted - they can improve compression, |
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| 146 | // but may slow encoding and decoding. |
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| 147 | // c->max_b_frames = 2; |
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[6a4cdcb6] | 148 | |
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[cc9e7a06] | 149 | if (oc->oformat->flags & AVFMT_GLOBALHEADER) |
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| 150 | c->flags |= CODEC_FLAG_GLOBAL_HEADER; |
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| 151 | |
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[1805274] | 152 | // Set the output parameters (must be done even if no parameters). |
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[091069f] | 153 | int retval = av_set_parameters(oc, NULL); |
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| 154 | if (retval < 0) { |
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| 155 | averrno = retval; |
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[1805274] | 156 | return false; |
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| 157 | } |
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| 158 | |
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| 159 | // Show the format we've ended up with (for debug purposes). |
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| 160 | // dump_format(oc, 0, fnm, 1); |
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| 161 | |
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| 162 | // Open the video codec and allocate the necessary encode buffers. |
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| 163 | AVCodec * codec = avcodec_find_encoder(c->codec_id); |
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| 164 | if (!codec) { |
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| 165 | // FIXME : Erm - internal ffmpeg library problem? |
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| 166 | return false; |
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| 167 | } |
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[091069f] | 168 | |
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| 169 | retval = avcodec_open(c, codec); |
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| 170 | if (retval < 0) { |
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| 171 | averrno = retval; |
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[1805274] | 172 | return false; |
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[6a4cdcb6] | 173 | } |
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[1805274] | 174 | |
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[cc9e7a06] | 175 | if ((oc->oformat->flags & AVFMT_RAWPICTURE)) { |
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| 176 | outbuf = NULL; |
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| 177 | } else { |
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| 178 | outbuf = (unsigned char *)malloc(OUTBUF_SIZE); |
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| 179 | if (!outbuf) { |
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[091069f] | 180 | averrno = AVERROR_NOMEM; |
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[cc9e7a06] | 181 | return false; |
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| 182 | } |
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[6a4cdcb6] | 183 | } |
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[1805274] | 184 | |
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[6a4cdcb6] | 185 | frame = avcodec_alloc_frame(); |
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[cc9e7a06] | 186 | if (!frame) { |
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[091069f] | 187 | averrno = AVERROR_NOMEM; |
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[1805274] | 188 | return false; |
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[6a4cdcb6] | 189 | } |
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[cc9e7a06] | 190 | int size = avpicture_get_size(c->pix_fmt, width, height); |
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[9e516d0d] | 191 | uint8_t * picture_buf = (uint8_t*)av_malloc(size); |
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| 192 | if (!picture_buf) { |
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[cc9e7a06] | 193 | av_free(frame); |
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[091069f] | 194 | averrno = AVERROR_NOMEM; |
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[1805274] | 195 | return false; |
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[6a4cdcb6] | 196 | } |
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[9e516d0d] | 197 | avpicture_fill((AVPicture *)frame, picture_buf, c->pix_fmt, width, height); |
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[cc9e7a06] | 198 | |
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| 199 | if (c->pix_fmt != PIX_FMT_YUV420P) { |
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| 200 | // FIXME need to allocate another frame for this case if we stop |
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| 201 | // hardcoding PIX_FMT_YUV420P. |
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| 202 | abort(); |
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| 203 | } |
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[6a4cdcb6] | 204 | |
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| 205 | pixels = (unsigned char *)malloc(width * height * 6); |
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| 206 | if (!pixels) { |
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[091069f] | 207 | averrno = AVERROR_NOMEM; |
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[1805274] | 208 | return false; |
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[6a4cdcb6] | 209 | } |
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[1805274] | 210 | |
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[091069f] | 211 | retval = url_fopen(&oc->pb, fnm, URL_WRONLY); |
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| 212 | if (retval < 0) { |
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| 213 | averrno = retval; |
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[1805274] | 214 | return false; |
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| 215 | } |
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| 216 | |
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| 217 | // Write the stream header, if any. |
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[091069f] | 218 | retval = av_write_header(oc); |
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| 219 | if (retval < 0) { |
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| 220 | averrno = retval; |
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[1805274] | 221 | return false; |
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| 222 | } |
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[9e516d0d] | 223 | |
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| 224 | av_free(sws_ctx); |
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| 225 | sws_ctx = sws_getContext(width, height, PIX_FMT_RGB24, |
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| 226 | width, height, c->pix_fmt, SWS_BICUBIC, |
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| 227 | NULL, NULL, NULL); |
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| 228 | if (sws_ctx == NULL) { |
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| 229 | fprintf(stderr, "Cannot initialize the conversion context!\n"); |
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| 230 | return false; |
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| 231 | } |
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| 232 | |
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[091069f] | 233 | averrno = 0; |
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[1805274] | 234 | return true; |
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[6a4cdcb6] | 235 | #else |
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[091069f] | 236 | averrno = MOVIE_NOT_ENABLED; |
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[6a4cdcb6] | 237 | return false; |
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| 238 | #endif |
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| 239 | } |
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| 240 | |
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| 241 | unsigned char * MovieMaker::GetBuffer() const { |
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[eac4514] | 242 | #ifdef HAVE_LIBAVFORMAT_AVFORMAT_H |
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[9e516d0d] | 243 | AVCodecContext * c = st->codec; |
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| 244 | return pixels + c->height * c->width * 3; |
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[eac4514] | 245 | #else |
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| 246 | return NULL; |
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| 247 | #endif |
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[6a4cdcb6] | 248 | } |
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| 249 | |
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| 250 | int MovieMaker::GetWidth() const { |
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[1805274] | 251 | assert(st); |
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[cc9e7a06] | 252 | #ifdef HAVE_LIBAVFORMAT_AVFORMAT_H |
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| 253 | AVCodecContext *c = st->codec; |
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[6a4cdcb6] | 254 | return c->width; |
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[1805274] | 255 | #else |
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| 256 | return 0; |
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| 257 | #endif |
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[6a4cdcb6] | 258 | } |
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| 259 | |
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| 260 | int MovieMaker::GetHeight() const { |
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[1805274] | 261 | assert(st); |
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[cc9e7a06] | 262 | #ifdef HAVE_LIBAVFORMAT_AVFORMAT_H |
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| 263 | AVCodecContext *c = st->codec; |
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[6a4cdcb6] | 264 | return c->height; |
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[1805274] | 265 | #else |
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| 266 | return 0; |
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| 267 | #endif |
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[6a4cdcb6] | 268 | } |
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| 269 | |
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| 270 | void MovieMaker::AddFrame() |
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| 271 | { |
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[cc9e7a06] | 272 | #ifdef HAVE_LIBAVFORMAT_AVFORMAT_H |
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| 273 | AVCodecContext * c = st->codec; |
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| 274 | |
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| 275 | if (c->pix_fmt != PIX_FMT_YUV420P) { |
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| 276 | // FIXME convert... |
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| 277 | abort(); |
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| 278 | } |
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[1805274] | 279 | |
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[9e516d0d] | 280 | int len = 3 * c->width; |
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[fed3713] | 281 | { |
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| 282 | // Flip image vertically |
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| 283 | int h = c->height; |
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| 284 | unsigned char * src = pixels + h * len; |
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| 285 | unsigned char * dest = src - len; |
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| 286 | while (h--) { |
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| 287 | memcpy(dest, src, len); |
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| 288 | src += len; |
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| 289 | dest -= len; |
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| 290 | } |
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[6a4cdcb6] | 291 | } |
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[9e516d0d] | 292 | sws_scale(sws_ctx, &pixels, &len, 0, c->height, frame->data, frame->linesize); |
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[6a4cdcb6] | 293 | |
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[cc9e7a06] | 294 | if (oc->oformat->flags & AVFMT_RAWPICTURE) { |
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| 295 | abort(); |
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| 296 | } |
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[6a4cdcb6] | 297 | |
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[1805274] | 298 | // Encode this frame. |
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[6a4cdcb6] | 299 | out_size = avcodec_encode_video(c, outbuf, OUTBUF_SIZE, frame); |
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[1805274] | 300 | // outsize == 0 means that this frame has been buffered, so there's nothing |
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| 301 | // to write yet. |
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[cc9e7a06] | 302 | if (out_size) { |
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[1805274] | 303 | // Write the compressed frame to the media file. |
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[cc9e7a06] | 304 | AVPacket pkt; |
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| 305 | av_init_packet(&pkt); |
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| 306 | |
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| 307 | if (c->coded_frame->pts != AV_NOPTS_VALUE) |
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| 308 | pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base, st->time_base); |
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| 309 | if (c->coded_frame->key_frame) |
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| 310 | pkt.flags |= AV_PKT_FLAG_KEY; |
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| 311 | pkt.stream_index = st->index; |
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| 312 | pkt.data = outbuf; |
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| 313 | pkt.size = out_size; |
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| 314 | |
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| 315 | /* write the compressed frame in the media file */ |
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| 316 | if (av_interleaved_write_frame(oc, &pkt) != 0) { |
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| 317 | abort(); |
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[1805274] | 318 | } |
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[6a4cdcb6] | 319 | } |
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| 320 | #endif |
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| 321 | } |
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| 322 | |
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| 323 | MovieMaker::~MovieMaker() |
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| 324 | { |
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[cc9e7a06] | 325 | #ifdef HAVE_LIBAVFORMAT_AVFORMAT_H |
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[091069f] | 326 | if (st && averrno == 0) { |
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[1805274] | 327 | // No more frames to compress. The codec may have a few frames |
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| 328 | // buffered if we're using B frames, so write those too. |
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[cc9e7a06] | 329 | AVCodecContext * c = st->codec; |
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[1805274] | 330 | |
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| 331 | while (out_size) { |
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| 332 | out_size = avcodec_encode_video(c, outbuf, OUTBUF_SIZE, NULL); |
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| 333 | if (out_size) { |
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[cc9e7a06] | 334 | // Write the compressed frame to the media file. |
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| 335 | AVPacket pkt; |
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| 336 | av_init_packet(&pkt); |
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| 337 | |
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| 338 | if (c->coded_frame->pts != AV_NOPTS_VALUE) |
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| 339 | pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base, st->time_base); |
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| 340 | if (c->coded_frame->key_frame) |
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| 341 | pkt.flags |= AV_PKT_FLAG_KEY; |
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| 342 | pkt.stream_index = st->index; |
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| 343 | pkt.data = outbuf; |
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| 344 | pkt.size = out_size; |
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| 345 | |
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| 346 | /* write the compressed frame in the media file */ |
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| 347 | if (av_interleaved_write_frame(oc, &pkt) != 0) { |
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| 348 | abort(); |
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[1805274] | 349 | } |
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| 350 | } |
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[6a4cdcb6] | 351 | } |
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| 352 | |
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[cc9e7a06] | 353 | av_write_trailer(oc); |
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[091069f] | 354 | } |
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[cc9e7a06] | 355 | |
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[091069f] | 356 | if (st) { |
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[1805274] | 357 | // Close codec. |
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[091069f] | 358 | avcodec_close(st->codec); |
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[6a4cdcb6] | 359 | } |
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| 360 | |
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[cc9e7a06] | 361 | if (frame) { |
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| 362 | free(frame->data[0]); |
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| 363 | free(frame); |
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| 364 | } |
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[1805274] | 365 | free(outbuf); |
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[6a4cdcb6] | 366 | free(pixels); |
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[9e516d0d] | 367 | av_free(sws_ctx); |
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[1805274] | 368 | |
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| 369 | if (oc) { |
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| 370 | // Free the streams. |
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[cc9e7a06] | 371 | for (size_t i = 0; i < oc->nb_streams; ++i) { |
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| 372 | av_freep(&oc->streams[i]->codec); |
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[1805274] | 373 | av_freep(&oc->streams[i]); |
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| 374 | } |
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| 375 | |
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[cc9e7a06] | 376 | if (!(oc->oformat->flags & AVFMT_NOFILE)) { |
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| 377 | // Close the output file. |
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| 378 | url_fclose(oc->pb); |
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| 379 | } |
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[1805274] | 380 | |
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| 381 | // Free the stream. |
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[6ed625e] | 382 | av_free(oc); |
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[1805274] | 383 | } |
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[6a4cdcb6] | 384 | #endif |
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| 385 | } |
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[091069f] | 386 | |
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| 387 | const char * |
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| 388 | MovieMaker::get_error_string() const |
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| 389 | { |
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[eac4514] | 390 | #ifdef HAVE_LIBAVFORMAT_AVFORMAT_H |
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[091069f] | 391 | switch (averrno) { |
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| 392 | case AVERROR_IO: |
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| 393 | return "I/O error"; |
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| 394 | case AVERROR_NUMEXPECTED: |
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| 395 | return "Number syntax expected in filename"; |
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| 396 | case AVERROR_INVALIDDATA: |
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| 397 | /* same as AVERROR_UNKNOWN: return "unknown error"; */ |
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| 398 | return "invalid data found"; |
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| 399 | case AVERROR_NOMEM: |
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| 400 | return "not enough memory"; |
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| 401 | case AVERROR_NOFMT: |
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| 402 | return "unknown format"; |
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| 403 | case AVERROR_NOTSUPP: |
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| 404 | return "Operation not supported"; |
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| 405 | case AVERROR_NOENT: |
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| 406 | return "No such file or directory"; |
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| 407 | case AVERROR_EOF: |
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| 408 | return "End of file"; |
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| 409 | case AVERROR_PATCHWELCOME: |
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| 410 | return "Not implemented in FFmpeg"; |
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| 411 | case 0: |
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| 412 | return "No error"; |
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| 413 | case MOVIE_NO_SUITABLE_FORMAT: |
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| 414 | return "Couldn't find a suitable output format"; |
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| 415 | case MOVIE_AUDIO_ONLY: |
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| 416 | return "Audio-only format specified"; |
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| 417 | case MOVIE_FILENAME_TOO_LONG: |
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| 418 | return "Filename too long"; |
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| 419 | case MOVIE_NOT_ENABLED: |
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| 420 | return "Movie export support not included"; |
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| 421 | } |
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| 422 | return "Unknown error"; |
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[eac4514] | 423 | #else |
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| 424 | return "Movie generation support code not present"; |
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| 425 | #endif |
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[091069f] | 426 | } |
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