[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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[91a758c] | 6 | // Copyright (C) 2004-2024 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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[40d1db36] | 61 | #ifdef WITH_FFMPEG |
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[cc9e7a06] | 62 | extern "C" { |
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[44c4b70] | 63 | # include <libavcodec/avcodec.h> |
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[b282f44] | 64 | # include <libavutil/imgutils.h> |
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[008f2f3] | 65 | # include <libavutil/mathematics.h> |
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[64d06c0] | 66 | # include <libavformat/avformat.h> |
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[86d8ee5] | 67 | # include <libswscale/swscale.h> |
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[cc9e7a06] | 68 | } |
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[0aaa578] | 69 | #endif |
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[6a4cdcb6] | 70 | |
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[40d1db36] | 71 | // Handle the "no FFmpeg" case in this file. |
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| 72 | #if !defined WITH_FFMPEG || LIBAVCODEC_VERSION_MAJOR >= 57 |
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[0aaa578] | 73 | |
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[40d1db36] | 74 | #ifdef WITH_FFMPEG |
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[091069f] | 75 | enum { |
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| 76 | MOVIE_NO_SUITABLE_FORMAT = 1, |
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| 77 | MOVIE_AUDIO_ONLY, |
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[c648bd1] | 78 | MOVIE_FILENAME_TOO_LONG |
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[091069f] | 79 | }; |
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[bc6faa9] | 80 | #endif |
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[6a4cdcb6] | 81 | |
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[1805274] | 82 | MovieMaker::MovieMaker() |
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[40d1db36] | 83 | #ifdef WITH_FFMPEG |
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[0aaa578] | 84 | : oc(0), video_st(0), context(0), frame(0), pixels(0), sws_ctx(0), averrno(0) |
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[ccb83b7] | 85 | #endif |
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[6a4cdcb6] | 86 | { |
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[40d1db36] | 87 | #ifdef WITH_FFMPEG |
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[6a4cdcb6] | 88 | static bool initialised_ffmpeg = false; |
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[1805274] | 89 | if (initialised_ffmpeg) return; |
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[6a4cdcb6] | 90 | |
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[0482978] | 91 | #if LIBAVCODEC_VERSION_MAJOR < 58 |
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[64d06c0] | 92 | avcodec_register_all(); |
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[1805274] | 93 | av_register_all(); |
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[0482978] | 94 | #endif |
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[6a4cdcb6] | 95 | |
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[1805274] | 96 | initialised_ffmpeg = true; |
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| 97 | #endif |
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| 98 | } |
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| 99 | |
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[40d1db36] | 100 | #ifdef WITH_FFMPEG |
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[f4e4b56] | 101 | static int |
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[91a758c] | 102 | write_packet(void *opaque, |
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| 103 | #if LIBAVFORMAT_VERSION_MAJOR < 61 |
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| 104 | uint8_t *buf, |
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| 105 | #else |
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| 106 | const uint8_t *buf, |
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| 107 | #endif |
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| 108 | int buf_size) |
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| 109 | { |
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[f4e4b56] | 110 | FILE * fh = (FILE*)opaque; |
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| 111 | size_t res = fwrite(buf, 1, buf_size, fh); |
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| 112 | return res > 0 ? res : -1; |
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| 113 | } |
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[420cda9] | 114 | |
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| 115 | static int64_t |
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| 116 | seek_stream(void *opaque, int64_t offset, int whence) { |
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| 117 | FILE * fh = (FILE*)opaque; |
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| 118 | return fseek(fh, offset, whence); |
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| 119 | } |
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[0db0f91] | 120 | #endif |
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[f4e4b56] | 121 | |
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| 122 | #define MAX_EXTENSION_LEN 8 |
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| 123 | |
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| 124 | bool MovieMaker::Open(FILE* fh, const char * ext, int width, int height) |
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[1805274] | 125 | { |
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[40d1db36] | 126 | #ifdef WITH_FFMPEG |
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[f4e4b56] | 127 | fh_to_close = fh; |
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| 128 | |
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[0aaa578] | 129 | /* Allocate the output media context. */ |
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[f4e4b56] | 130 | char dummy_filename[MAX_EXTENSION_LEN + 3] = "x."; |
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[0aaa578] | 131 | oc = NULL; |
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[f4e4b56] | 132 | if (strlen(ext) <= MAX_EXTENSION_LEN) { |
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[0aaa578] | 133 | // Use "x." + extension for format detection to avoid having to deal |
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[f4e4b56] | 134 | // with wide character filenames. |
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[0aaa578] | 135 | strcpy(dummy_filename + 2, ext); |
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| 136 | avformat_alloc_output_context2(&oc, NULL, NULL, dummy_filename); |
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[1805274] | 137 | } |
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[0aaa578] | 138 | if (!oc) { |
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| 139 | averrno = MOVIE_NO_SUITABLE_FORMAT; |
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[1805274] | 140 | return false; |
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[6a4cdcb6] | 141 | } |
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| 142 | |
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[44c4b70] | 143 | auto fmt = oc->oformat; |
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[0aaa578] | 144 | if (fmt->video_codec == AV_CODEC_ID_NONE) { |
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| 145 | averrno = MOVIE_AUDIO_ONLY; |
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[1805274] | 146 | return false; |
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[6a4cdcb6] | 147 | } |
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| 148 | |
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[64d06c0] | 149 | /* find the video encoder */ |
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[44c4b70] | 150 | auto codec = avcodec_find_encoder(fmt->video_codec); |
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[64d06c0] | 151 | if (!codec) { |
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| 152 | // FIXME : Erm - internal ffmpeg library problem? |
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[63621a7] | 153 | averrno = AVERROR(ENOMEM); |
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[1805274] | 154 | return false; |
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[6a4cdcb6] | 155 | } |
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| 156 | |
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[64d06c0] | 157 | // Add the video stream. |
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[0aaa578] | 158 | video_st = avformat_new_stream(oc, NULL); |
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[64d06c0] | 159 | if (!video_st) { |
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| 160 | averrno = AVERROR(ENOMEM); |
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| 161 | return false; |
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| 162 | } |
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[6a4cdcb6] | 163 | |
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[0aaa578] | 164 | context = avcodec_alloc_context3(codec); |
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| 165 | context->codec_id = fmt->video_codec; |
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| 166 | context->width = width; |
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| 167 | context->height = height; |
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[5270758] | 168 | video_st->time_base.den = 25; // Frames per second. |
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| 169 | video_st->time_base.num = 1; |
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[0aaa578] | 170 | context->time_base = video_st->time_base; |
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| 171 | context->bit_rate = width * height * (4 * 0.07) * context->time_base.den / context->time_base.num; |
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| 172 | context->bit_rate_tolerance = context->bit_rate; |
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| 173 | context->global_quality = 4; |
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| 174 | context->rc_buffer_size = 2 * 1024 * 1024; |
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| 175 | context->rc_max_rate = context->bit_rate * 8; |
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| 176 | context->gop_size = 50; /* Twice the framerate */ |
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| 177 | context->pix_fmt = AV_PIX_FMT_YUV420P; |
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| 178 | if (context->has_b_frames) { |
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| 179 | // B frames are backwards predicted - they can improve compression, |
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| 180 | // but may slow encoding and decoding. |
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| 181 | context->max_b_frames = 4; |
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| 182 | } |
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[6a4cdcb6] | 183 | |
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[64d06c0] | 184 | /* Some formats want stream headers to be separate. */ |
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[cc9e7a06] | 185 | if (oc->oformat->flags & AVFMT_GLOBALHEADER) |
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[5e46ae2] | 186 | context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; |
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[cc9e7a06] | 187 | |
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[7831cef] | 188 | int retval; |
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[0aaa578] | 189 | retval = avcodec_open2(context, codec, NULL); |
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[091069f] | 190 | if (retval < 0) { |
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| 191 | averrno = retval; |
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[1805274] | 192 | return false; |
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[6a4cdcb6] | 193 | } |
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[1805274] | 194 | |
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[64d06c0] | 195 | /* Allocate the encoded raw picture. */ |
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[8364c65f] | 196 | frame = av_frame_alloc(); |
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[cc9e7a06] | 197 | if (!frame) { |
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[63621a7] | 198 | averrno = AVERROR(ENOMEM); |
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[1805274] | 199 | return false; |
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[6a4cdcb6] | 200 | } |
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[0aaa578] | 201 | |
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| 202 | frame->format = context->pix_fmt; |
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| 203 | frame->width = width; |
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| 204 | frame->height = height; |
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| 205 | frame->pts = 0; |
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| 206 | |
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| 207 | retval = av_frame_get_buffer(frame, 32); |
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[64d06c0] | 208 | if (retval < 0) { |
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| 209 | averrno = retval; |
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[1805274] | 210 | return false; |
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[6a4cdcb6] | 211 | } |
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[cc9e7a06] | 212 | |
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[0aaa578] | 213 | if (frame->format != AV_PIX_FMT_YUV420P) { |
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[cc9e7a06] | 214 | // FIXME need to allocate another frame for this case if we stop |
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[8364c65f] | 215 | // hardcoding AV_PIX_FMT_YUV420P. |
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[cc9e7a06] | 216 | abort(); |
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| 217 | } |
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[6a4cdcb6] | 218 | |
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[0aaa578] | 219 | /* copy the stream parameters to the muxer */ |
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| 220 | retval = avcodec_parameters_from_context(video_st->codecpar, context); |
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| 221 | if (retval < 0) { |
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| 222 | averrno = retval; |
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| 223 | return false; |
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| 224 | } |
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[5270758] | 225 | |
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[d13aea6] | 226 | pixels = (unsigned char *)av_malloc(width * height * 6); |
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[6a4cdcb6] | 227 | if (!pixels) { |
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[63621a7] | 228 | averrno = AVERROR(ENOMEM); |
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[1805274] | 229 | return false; |
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[6a4cdcb6] | 230 | } |
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[1805274] | 231 | |
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[64d06c0] | 232 | // Show the format we've ended up with (for debug purposes). |
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[0aaa578] | 233 | // av_dump_format(oc, 0, dummy_filename, 1); |
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[64d06c0] | 234 | |
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| 235 | av_free(sws_ctx); |
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[ad04c87] | 236 | sws_ctx = sws_getContext(width, height, AV_PIX_FMT_RGB24, |
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[0aaa578] | 237 | width, height, context->pix_fmt, SWS_BICUBIC, |
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[64d06c0] | 238 | NULL, NULL, NULL); |
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| 239 | if (sws_ctx == NULL) { |
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| 240 | fprintf(stderr, "Cannot initialize the conversion context!\n"); |
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| 241 | averrno = AVERROR(ENOMEM); |
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[1805274] | 242 | return false; |
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| 243 | } |
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| 244 | |
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[64d06c0] | 245 | if (!(fmt->flags & AVFMT_NOFILE)) { |
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[f4e4b56] | 246 | const int buf_size = 8192; |
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| 247 | void * buf = av_malloc(buf_size); |
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| 248 | oc->pb = avio_alloc_context(static_cast<uint8_t*>(buf), buf_size, 1, |
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[420cda9] | 249 | fh, NULL, write_packet, seek_stream); |
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[f4e4b56] | 250 | if (!oc->pb) { |
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| 251 | averrno = AVERROR(ENOMEM); |
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[64d06c0] | 252 | return false; |
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| 253 | } |
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| 254 | } |
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| 255 | |
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[1805274] | 256 | // Write the stream header, if any. |
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[7831cef] | 257 | retval = avformat_write_header(oc, NULL); |
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[091069f] | 258 | if (retval < 0) { |
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| 259 | averrno = retval; |
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[1805274] | 260 | return false; |
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| 261 | } |
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[9e516d0d] | 262 | |
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[091069f] | 263 | averrno = 0; |
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[1805274] | 264 | return true; |
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[6a4cdcb6] | 265 | #else |
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[f4e4b56] | 266 | (void)fh; |
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| 267 | (void)ext; |
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[6e22f11] | 268 | (void)width; |
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| 269 | (void)height; |
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[6a4cdcb6] | 270 | return false; |
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| 271 | #endif |
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| 272 | } |
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| 273 | |
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| 274 | unsigned char * MovieMaker::GetBuffer() const { |
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[40d1db36] | 275 | #ifdef WITH_FFMPEG |
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[cd04101] | 276 | return pixels + GetWidth() * GetHeight() * 3; |
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[eac4514] | 277 | #else |
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| 278 | return NULL; |
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| 279 | #endif |
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[6a4cdcb6] | 280 | } |
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| 281 | |
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| 282 | int MovieMaker::GetWidth() const { |
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[40d1db36] | 283 | #ifdef WITH_FFMPEG |
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[ccb83b7] | 284 | assert(video_st); |
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[0aaa578] | 285 | return video_st->codecpar->width; |
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[1805274] | 286 | #else |
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| 287 | return 0; |
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| 288 | #endif |
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[6a4cdcb6] | 289 | } |
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| 290 | |
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| 291 | int MovieMaker::GetHeight() const { |
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[40d1db36] | 292 | #ifdef WITH_FFMPEG |
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[ccb83b7] | 293 | assert(video_st); |
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[0aaa578] | 294 | return video_st->codecpar->height; |
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[1805274] | 295 | #else |
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| 296 | return 0; |
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| 297 | #endif |
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[6a4cdcb6] | 298 | } |
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| 299 | |
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[40d1db36] | 300 | #ifdef WITH_FFMPEG |
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[0aaa578] | 301 | // Call with frame=NULL when done. |
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| 302 | int |
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| 303 | MovieMaker::encode_frame(AVFrame* frame_or_null) |
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| 304 | { |
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| 305 | int ret = avcodec_send_frame(context, frame_or_null); |
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| 306 | if (ret < 0) return ret; |
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| 307 | |
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| 308 | AVPacket *pkt = av_packet_alloc(); |
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| 309 | pkt->size = 0; |
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| 310 | while ((ret = avcodec_receive_packet(context, pkt)) == 0) { |
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| 311 | // Rescale output packet timestamp values from codec to stream timebase. |
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| 312 | av_packet_rescale_ts(pkt, context->time_base, video_st->time_base); |
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| 313 | pkt->stream_index = video_st->index; |
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| 314 | |
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| 315 | // Write the compressed frame to the media file. |
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| 316 | ret = av_interleaved_write_frame(oc, pkt); |
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| 317 | if (ret < 0) { |
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| 318 | av_packet_free(&pkt); |
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| 319 | release(); |
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| 320 | return ret; |
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| 321 | } |
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| 322 | } |
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| 323 | av_packet_free(&pkt); |
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| 324 | return 0; |
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| 325 | } |
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| 326 | #endif |
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| 327 | |
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[98fd937] | 328 | bool MovieMaker::AddFrame() |
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[6a4cdcb6] | 329 | { |
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[40d1db36] | 330 | #ifdef WITH_FFMPEG |
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[0aaa578] | 331 | int ret = av_frame_make_writable(frame); |
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| 332 | if (ret < 0) { |
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| 333 | averrno = ret; |
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| 334 | return false; |
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| 335 | } |
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[cc9e7a06] | 336 | |
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[0aaa578] | 337 | enum AVPixelFormat pix_fmt = context->pix_fmt; |
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| 338 | |
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| 339 | if (pix_fmt != AV_PIX_FMT_YUV420P) { |
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[cc9e7a06] | 340 | // FIXME convert... |
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| 341 | abort(); |
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| 342 | } |
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[1805274] | 343 | |
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[0aaa578] | 344 | int len = 3 * GetWidth(); |
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[fed3713] | 345 | { |
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| 346 | // Flip image vertically |
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[0aaa578] | 347 | int h = GetHeight(); |
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[fed3713] | 348 | unsigned char * src = pixels + h * len; |
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| 349 | unsigned char * dest = src - len; |
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| 350 | while (h--) { |
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| 351 | memcpy(dest, src, len); |
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| 352 | src += len; |
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| 353 | dest -= len; |
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| 354 | } |
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[6a4cdcb6] | 355 | } |
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[0aaa578] | 356 | sws_scale(sws_ctx, &pixels, &len, 0, GetHeight(), |
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| 357 | frame->data, frame->linesize); |
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[6a4cdcb6] | 358 | |
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[0aaa578] | 359 | ++frame->pts; |
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[64d06c0] | 360 | |
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[0aaa578] | 361 | // Encode this frame. |
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| 362 | ret = encode_frame(frame); |
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[64d06c0] | 363 | if (ret < 0) { |
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[98fd937] | 364 | averrno = ret; |
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| 365 | return false; |
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[64d06c0] | 366 | } |
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| 367 | #endif |
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[98fd937] | 368 | return true; |
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[6a4cdcb6] | 369 | } |
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| 370 | |
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[98fd937] | 371 | bool |
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| 372 | MovieMaker::Close() |
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[6a4cdcb6] | 373 | { |
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[40d1db36] | 374 | #ifdef WITH_FFMPEG |
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[64d06c0] | 375 | if (video_st && averrno == 0) { |
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[0aaa578] | 376 | // Flush out any remaining data. |
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| 377 | int ret = encode_frame(NULL); |
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| 378 | if (ret < 0) { |
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| 379 | averrno = ret; |
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| 380 | return false; |
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[6a4cdcb6] | 381 | } |
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[cc9e7a06] | 382 | av_write_trailer(oc); |
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[091069f] | 383 | } |
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[cc9e7a06] | 384 | |
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[98fd937] | 385 | release(); |
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| 386 | #endif |
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| 387 | return true; |
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| 388 | } |
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| 389 | |
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[40d1db36] | 390 | #ifdef WITH_FFMPEG |
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[98fd937] | 391 | void |
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| 392 | MovieMaker::release() |
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| 393 | { |
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[0aaa578] | 394 | // Close codec. |
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| 395 | avcodec_free_context(&context); |
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| 396 | av_frame_free(&frame); |
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[d13aea6] | 397 | av_free(pixels); |
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[98fd937] | 398 | pixels = NULL; |
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[0aaa578] | 399 | sws_freeContext(sws_ctx); |
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[98fd937] | 400 | sws_ctx = NULL; |
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[1805274] | 401 | |
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[0aaa578] | 402 | // Free the stream. |
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| 403 | avformat_free_context(oc); |
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| 404 | oc = NULL; |
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[1805274] | 405 | |
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[f4e4b56] | 406 | if (fh_to_close) { |
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| 407 | fclose(fh_to_close); |
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| 408 | fh_to_close = NULL; |
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| 409 | } |
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[6a4cdcb6] | 410 | } |
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[c648bd1] | 411 | #endif |
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[091069f] | 412 | |
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[98fd937] | 413 | MovieMaker::~MovieMaker() |
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| 414 | { |
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[40d1db36] | 415 | #ifdef WITH_FFMPEG |
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[98fd937] | 416 | release(); |
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[c648bd1] | 417 | #endif |
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[98fd937] | 418 | } |
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| 419 | |
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[091069f] | 420 | const char * |
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| 421 | MovieMaker::get_error_string() const |
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| 422 | { |
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[40d1db36] | 423 | #ifdef WITH_FFMPEG |
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[091069f] | 424 | switch (averrno) { |
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[63621a7] | 425 | case AVERROR(EIO): |
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[091069f] | 426 | return "I/O error"; |
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[63621a7] | 427 | case AVERROR(EDOM): |
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[091069f] | 428 | return "Number syntax expected in filename"; |
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| 429 | case AVERROR_INVALIDDATA: |
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| 430 | /* same as AVERROR_UNKNOWN: return "unknown error"; */ |
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| 431 | return "invalid data found"; |
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[63621a7] | 432 | case AVERROR(ENOMEM): |
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[091069f] | 433 | return "not enough memory"; |
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[63621a7] | 434 | case AVERROR(EILSEQ): |
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[091069f] | 435 | return "unknown format"; |
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[63621a7] | 436 | case AVERROR(ENOSYS): |
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[091069f] | 437 | return "Operation not supported"; |
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[63621a7] | 438 | case AVERROR(ENOENT): |
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[091069f] | 439 | return "No such file or directory"; |
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| 440 | case AVERROR_EOF: |
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| 441 | return "End of file"; |
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| 442 | case AVERROR_PATCHWELCOME: |
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| 443 | return "Not implemented in FFmpeg"; |
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| 444 | case 0: |
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| 445 | return "No error"; |
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| 446 | case MOVIE_NO_SUITABLE_FORMAT: |
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| 447 | return "Couldn't find a suitable output format"; |
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| 448 | case MOVIE_AUDIO_ONLY: |
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| 449 | return "Audio-only format specified"; |
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| 450 | case MOVIE_FILENAME_TOO_LONG: |
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| 451 | return "Filename too long"; |
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| 452 | } |
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[eac4514] | 453 | #endif |
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[f4e4b56] | 454 | return "Unknown error"; |
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[091069f] | 455 | } |
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[0aaa578] | 456 | |
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| 457 | #else |
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| 458 | |
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| 459 | #include "moviemaker-legacy.cc" |
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| 460 | |
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| 461 | #endif |
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