[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 | #include <config.h> |
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| 50 | |
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[cc9e7a06] | 51 | #define __STDC_CONSTANT_MACROS |
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| 52 | |
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[1805274] | 53 | #include <assert.h> |
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[6a4cdcb6] | 54 | #include <stdlib.h> |
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| 55 | #include <string.h> |
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| 56 | |
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| 57 | #include "moviemaker.h" |
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| 58 | |
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[40d1db36] | 59 | #ifdef WITH_FFMPEG |
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[cc9e7a06] | 60 | extern "C" { |
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[44c4b70] | 61 | # include <libavcodec/avcodec.h> |
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[b282f44] | 62 | # include <libavutil/imgutils.h> |
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[008f2f3] | 63 | # include <libavutil/mathematics.h> |
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[64d06c0] | 64 | # include <libavformat/avformat.h> |
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[86d8ee5] | 65 | # include <libswscale/swscale.h> |
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[cc9e7a06] | 66 | } |
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[0aaa578] | 67 | #endif |
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[6a4cdcb6] | 68 | |
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[40d1db36] | 69 | // Handle the "no FFmpeg" case in this file. |
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| 70 | #if !defined WITH_FFMPEG || LIBAVCODEC_VERSION_MAJOR >= 57 |
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[0aaa578] | 71 | |
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[40d1db36] | 72 | #ifdef WITH_FFMPEG |
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[091069f] | 73 | enum { |
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| 74 | MOVIE_NO_SUITABLE_FORMAT = 1, |
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| 75 | MOVIE_AUDIO_ONLY, |
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[c648bd1] | 76 | MOVIE_FILENAME_TOO_LONG |
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[091069f] | 77 | }; |
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[bc6faa9] | 78 | #endif |
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[6a4cdcb6] | 79 | |
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[1805274] | 80 | MovieMaker::MovieMaker() |
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[40d1db36] | 81 | #ifdef WITH_FFMPEG |
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[0aaa578] | 82 | : oc(0), video_st(0), context(0), frame(0), pixels(0), sws_ctx(0), averrno(0) |
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[ccb83b7] | 83 | #endif |
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[6a4cdcb6] | 84 | { |
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[40d1db36] | 85 | #ifdef WITH_FFMPEG |
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[6a4cdcb6] | 86 | static bool initialised_ffmpeg = false; |
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[1805274] | 87 | if (initialised_ffmpeg) return; |
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[6a4cdcb6] | 88 | |
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[0482978] | 89 | #if LIBAVCODEC_VERSION_MAJOR < 58 |
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[64d06c0] | 90 | avcodec_register_all(); |
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[1805274] | 91 | av_register_all(); |
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[0482978] | 92 | #endif |
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[6a4cdcb6] | 93 | |
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[1805274] | 94 | initialised_ffmpeg = true; |
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| 95 | #endif |
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| 96 | } |
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| 97 | |
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[40d1db36] | 98 | #ifdef WITH_FFMPEG |
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[f4e4b56] | 99 | static int |
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[91a758c] | 100 | write_packet(void *opaque, |
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| 101 | #if LIBAVFORMAT_VERSION_MAJOR < 61 |
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| 102 | uint8_t *buf, |
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| 103 | #else |
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| 104 | const uint8_t *buf, |
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| 105 | #endif |
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| 106 | int buf_size) |
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| 107 | { |
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[f4e4b56] | 108 | FILE * fh = (FILE*)opaque; |
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| 109 | size_t res = fwrite(buf, 1, buf_size, fh); |
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| 110 | return res > 0 ? res : -1; |
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| 111 | } |
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[420cda9] | 112 | |
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| 113 | static int64_t |
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| 114 | seek_stream(void *opaque, int64_t offset, int whence) { |
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| 115 | FILE * fh = (FILE*)opaque; |
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| 116 | return fseek(fh, offset, whence); |
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| 117 | } |
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[0db0f91] | 118 | #endif |
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[f4e4b56] | 119 | |
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| 120 | #define MAX_EXTENSION_LEN 8 |
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| 121 | |
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| 122 | bool MovieMaker::Open(FILE* fh, const char * ext, int width, int height) |
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[1805274] | 123 | { |
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[40d1db36] | 124 | #ifdef WITH_FFMPEG |
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[f4e4b56] | 125 | fh_to_close = fh; |
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| 126 | |
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[0aaa578] | 127 | /* Allocate the output media context. */ |
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[f4e4b56] | 128 | char dummy_filename[MAX_EXTENSION_LEN + 3] = "x."; |
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[0aaa578] | 129 | oc = NULL; |
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[f4e4b56] | 130 | if (strlen(ext) <= MAX_EXTENSION_LEN) { |
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[0aaa578] | 131 | // Use "x." + extension for format detection to avoid having to deal |
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[f4e4b56] | 132 | // with wide character filenames. |
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[0aaa578] | 133 | strcpy(dummy_filename + 2, ext); |
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| 134 | avformat_alloc_output_context2(&oc, NULL, NULL, dummy_filename); |
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[1805274] | 135 | } |
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[0aaa578] | 136 | if (!oc) { |
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| 137 | averrno = MOVIE_NO_SUITABLE_FORMAT; |
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[1805274] | 138 | return false; |
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[6a4cdcb6] | 139 | } |
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| 140 | |
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[44c4b70] | 141 | auto fmt = oc->oformat; |
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[0aaa578] | 142 | if (fmt->video_codec == AV_CODEC_ID_NONE) { |
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| 143 | averrno = MOVIE_AUDIO_ONLY; |
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[1805274] | 144 | return false; |
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[6a4cdcb6] | 145 | } |
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| 146 | |
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[64d06c0] | 147 | /* find the video encoder */ |
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[44c4b70] | 148 | auto codec = avcodec_find_encoder(fmt->video_codec); |
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[64d06c0] | 149 | if (!codec) { |
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| 150 | // FIXME : Erm - internal ffmpeg library problem? |
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[63621a7] | 151 | averrno = AVERROR(ENOMEM); |
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[1805274] | 152 | return false; |
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[6a4cdcb6] | 153 | } |
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| 154 | |
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[64d06c0] | 155 | // Add the video stream. |
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[0aaa578] | 156 | video_st = avformat_new_stream(oc, NULL); |
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[64d06c0] | 157 | if (!video_st) { |
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| 158 | averrno = AVERROR(ENOMEM); |
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| 159 | return false; |
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| 160 | } |
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[6a4cdcb6] | 161 | |
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[0aaa578] | 162 | context = avcodec_alloc_context3(codec); |
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| 163 | context->codec_id = fmt->video_codec; |
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| 164 | context->width = width; |
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| 165 | context->height = height; |
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[5270758] | 166 | video_st->time_base.den = 25; // Frames per second. |
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| 167 | video_st->time_base.num = 1; |
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[0aaa578] | 168 | context->time_base = video_st->time_base; |
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| 169 | context->bit_rate = width * height * (4 * 0.07) * context->time_base.den / context->time_base.num; |
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| 170 | context->bit_rate_tolerance = context->bit_rate; |
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| 171 | context->global_quality = 4; |
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| 172 | context->rc_buffer_size = 2 * 1024 * 1024; |
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| 173 | context->rc_max_rate = context->bit_rate * 8; |
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| 174 | context->gop_size = 50; /* Twice the framerate */ |
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| 175 | context->pix_fmt = AV_PIX_FMT_YUV420P; |
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| 176 | if (context->has_b_frames) { |
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| 177 | // B frames are backwards predicted - they can improve compression, |
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| 178 | // but may slow encoding and decoding. |
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| 179 | context->max_b_frames = 4; |
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| 180 | } |
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[6a4cdcb6] | 181 | |
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[64d06c0] | 182 | /* Some formats want stream headers to be separate. */ |
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[cc9e7a06] | 183 | if (oc->oformat->flags & AVFMT_GLOBALHEADER) |
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[5e46ae2] | 184 | context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; |
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[cc9e7a06] | 185 | |
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[7831cef] | 186 | int retval; |
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[0aaa578] | 187 | retval = avcodec_open2(context, codec, NULL); |
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[091069f] | 188 | if (retval < 0) { |
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| 189 | averrno = retval; |
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[1805274] | 190 | return false; |
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[6a4cdcb6] | 191 | } |
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[1805274] | 192 | |
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[64d06c0] | 193 | /* Allocate the encoded raw picture. */ |
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[8364c65f] | 194 | frame = av_frame_alloc(); |
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[cc9e7a06] | 195 | if (!frame) { |
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[63621a7] | 196 | averrno = AVERROR(ENOMEM); |
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[1805274] | 197 | return false; |
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[6a4cdcb6] | 198 | } |
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[0aaa578] | 199 | |
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| 200 | frame->format = context->pix_fmt; |
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| 201 | frame->width = width; |
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| 202 | frame->height = height; |
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| 203 | frame->pts = 0; |
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| 204 | |
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| 205 | retval = av_frame_get_buffer(frame, 32); |
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[64d06c0] | 206 | if (retval < 0) { |
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| 207 | averrno = retval; |
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[1805274] | 208 | return false; |
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[6a4cdcb6] | 209 | } |
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[cc9e7a06] | 210 | |
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[0aaa578] | 211 | if (frame->format != AV_PIX_FMT_YUV420P) { |
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[cc9e7a06] | 212 | // FIXME need to allocate another frame for this case if we stop |
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[8364c65f] | 213 | // hardcoding AV_PIX_FMT_YUV420P. |
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[cc9e7a06] | 214 | abort(); |
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| 215 | } |
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[6a4cdcb6] | 216 | |
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[0aaa578] | 217 | /* copy the stream parameters to the muxer */ |
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| 218 | retval = avcodec_parameters_from_context(video_st->codecpar, context); |
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| 219 | if (retval < 0) { |
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| 220 | averrno = retval; |
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| 221 | return false; |
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| 222 | } |
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[5270758] | 223 | |
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[d13aea6] | 224 | pixels = (unsigned char *)av_malloc(width * height * 6); |
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[6a4cdcb6] | 225 | if (!pixels) { |
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[63621a7] | 226 | averrno = AVERROR(ENOMEM); |
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[1805274] | 227 | return false; |
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[6a4cdcb6] | 228 | } |
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[1805274] | 229 | |
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[64d06c0] | 230 | // Show the format we've ended up with (for debug purposes). |
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[0aaa578] | 231 | // av_dump_format(oc, 0, dummy_filename, 1); |
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[64d06c0] | 232 | |
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| 233 | av_free(sws_ctx); |
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[ad04c87] | 234 | sws_ctx = sws_getContext(width, height, AV_PIX_FMT_RGB24, |
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[0aaa578] | 235 | width, height, context->pix_fmt, SWS_BICUBIC, |
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[64d06c0] | 236 | NULL, NULL, NULL); |
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| 237 | if (sws_ctx == NULL) { |
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| 238 | fprintf(stderr, "Cannot initialize the conversion context!\n"); |
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| 239 | averrno = AVERROR(ENOMEM); |
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[1805274] | 240 | return false; |
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| 241 | } |
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| 242 | |
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[64d06c0] | 243 | if (!(fmt->flags & AVFMT_NOFILE)) { |
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[f4e4b56] | 244 | const int buf_size = 8192; |
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| 245 | void * buf = av_malloc(buf_size); |
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| 246 | oc->pb = avio_alloc_context(static_cast<uint8_t*>(buf), buf_size, 1, |
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[420cda9] | 247 | fh, NULL, write_packet, seek_stream); |
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[f4e4b56] | 248 | if (!oc->pb) { |
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| 249 | averrno = AVERROR(ENOMEM); |
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[64d06c0] | 250 | return false; |
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| 251 | } |
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| 252 | } |
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| 253 | |
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[1805274] | 254 | // Write the stream header, if any. |
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[7831cef] | 255 | retval = avformat_write_header(oc, NULL); |
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[091069f] | 256 | if (retval < 0) { |
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| 257 | averrno = retval; |
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[1805274] | 258 | return false; |
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| 259 | } |
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[9e516d0d] | 260 | |
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[091069f] | 261 | averrno = 0; |
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[1805274] | 262 | return true; |
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[6a4cdcb6] | 263 | #else |
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[f4e4b56] | 264 | (void)fh; |
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| 265 | (void)ext; |
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[6e22f11] | 266 | (void)width; |
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| 267 | (void)height; |
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[6a4cdcb6] | 268 | return false; |
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| 269 | #endif |
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| 270 | } |
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| 271 | |
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| 272 | unsigned char * MovieMaker::GetBuffer() const { |
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[40d1db36] | 273 | #ifdef WITH_FFMPEG |
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[cd04101] | 274 | return pixels + GetWidth() * GetHeight() * 3; |
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[eac4514] | 275 | #else |
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| 276 | return NULL; |
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| 277 | #endif |
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[6a4cdcb6] | 278 | } |
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| 279 | |
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| 280 | int MovieMaker::GetWidth() const { |
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[40d1db36] | 281 | #ifdef WITH_FFMPEG |
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[ccb83b7] | 282 | assert(video_st); |
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[0aaa578] | 283 | return video_st->codecpar->width; |
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[1805274] | 284 | #else |
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| 285 | return 0; |
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| 286 | #endif |
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[6a4cdcb6] | 287 | } |
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| 288 | |
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| 289 | int MovieMaker::GetHeight() const { |
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[40d1db36] | 290 | #ifdef WITH_FFMPEG |
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[ccb83b7] | 291 | assert(video_st); |
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[0aaa578] | 292 | return video_st->codecpar->height; |
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[1805274] | 293 | #else |
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| 294 | return 0; |
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| 295 | #endif |
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[6a4cdcb6] | 296 | } |
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| 297 | |
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[40d1db36] | 298 | #ifdef WITH_FFMPEG |
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[0aaa578] | 299 | // Call with frame=NULL when done. |
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| 300 | int |
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| 301 | MovieMaker::encode_frame(AVFrame* frame_or_null) |
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| 302 | { |
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| 303 | int ret = avcodec_send_frame(context, frame_or_null); |
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| 304 | if (ret < 0) return ret; |
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| 305 | |
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| 306 | AVPacket *pkt = av_packet_alloc(); |
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| 307 | pkt->size = 0; |
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| 308 | while ((ret = avcodec_receive_packet(context, pkt)) == 0) { |
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| 309 | // Rescale output packet timestamp values from codec to stream timebase. |
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| 310 | av_packet_rescale_ts(pkt, context->time_base, video_st->time_base); |
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| 311 | pkt->stream_index = video_st->index; |
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| 312 | |
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| 313 | // Write the compressed frame to the media file. |
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| 314 | ret = av_interleaved_write_frame(oc, pkt); |
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| 315 | if (ret < 0) { |
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| 316 | av_packet_free(&pkt); |
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| 317 | release(); |
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| 318 | return ret; |
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| 319 | } |
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| 320 | } |
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| 321 | av_packet_free(&pkt); |
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| 322 | return 0; |
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| 323 | } |
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| 324 | #endif |
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| 325 | |
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[98fd937] | 326 | bool MovieMaker::AddFrame() |
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[6a4cdcb6] | 327 | { |
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[40d1db36] | 328 | #ifdef WITH_FFMPEG |
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[0aaa578] | 329 | int ret = av_frame_make_writable(frame); |
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| 330 | if (ret < 0) { |
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| 331 | averrno = ret; |
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| 332 | return false; |
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| 333 | } |
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[cc9e7a06] | 334 | |
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[0aaa578] | 335 | enum AVPixelFormat pix_fmt = context->pix_fmt; |
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| 336 | |
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| 337 | if (pix_fmt != AV_PIX_FMT_YUV420P) { |
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[cc9e7a06] | 338 | // FIXME convert... |
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| 339 | abort(); |
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| 340 | } |
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[1805274] | 341 | |
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[0aaa578] | 342 | int len = 3 * GetWidth(); |
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[fed3713] | 343 | { |
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| 344 | // Flip image vertically |
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[0aaa578] | 345 | int h = GetHeight(); |
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[fed3713] | 346 | unsigned char * src = pixels + h * len; |
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| 347 | unsigned char * dest = src - len; |
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| 348 | while (h--) { |
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| 349 | memcpy(dest, src, len); |
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| 350 | src += len; |
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| 351 | dest -= len; |
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| 352 | } |
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[6a4cdcb6] | 353 | } |
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[0aaa578] | 354 | sws_scale(sws_ctx, &pixels, &len, 0, GetHeight(), |
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| 355 | frame->data, frame->linesize); |
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[6a4cdcb6] | 356 | |
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[0aaa578] | 357 | ++frame->pts; |
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[64d06c0] | 358 | |
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[0aaa578] | 359 | // Encode this frame. |
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| 360 | ret = encode_frame(frame); |
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[64d06c0] | 361 | if (ret < 0) { |
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[98fd937] | 362 | averrno = ret; |
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| 363 | return false; |
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[64d06c0] | 364 | } |
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| 365 | #endif |
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[98fd937] | 366 | return true; |
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[6a4cdcb6] | 367 | } |
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| 368 | |
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[98fd937] | 369 | bool |
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| 370 | MovieMaker::Close() |
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[6a4cdcb6] | 371 | { |
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[40d1db36] | 372 | #ifdef WITH_FFMPEG |
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[64d06c0] | 373 | if (video_st && averrno == 0) { |
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[0aaa578] | 374 | // Flush out any remaining data. |
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| 375 | int ret = encode_frame(NULL); |
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| 376 | if (ret < 0) { |
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| 377 | averrno = ret; |
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| 378 | return false; |
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[6a4cdcb6] | 379 | } |
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[cc9e7a06] | 380 | av_write_trailer(oc); |
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[091069f] | 381 | } |
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[cc9e7a06] | 382 | |
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[98fd937] | 383 | release(); |
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| 384 | #endif |
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| 385 | return true; |
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| 386 | } |
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| 387 | |
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[40d1db36] | 388 | #ifdef WITH_FFMPEG |
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[98fd937] | 389 | void |
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| 390 | MovieMaker::release() |
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| 391 | { |
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[0aaa578] | 392 | // Close codec. |
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| 393 | avcodec_free_context(&context); |
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| 394 | av_frame_free(&frame); |
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[d13aea6] | 395 | av_free(pixels); |
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[98fd937] | 396 | pixels = NULL; |
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[0aaa578] | 397 | sws_freeContext(sws_ctx); |
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[98fd937] | 398 | sws_ctx = NULL; |
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[1805274] | 399 | |
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[0aaa578] | 400 | // Free the stream. |
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| 401 | avformat_free_context(oc); |
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| 402 | oc = NULL; |
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[1805274] | 403 | |
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[f4e4b56] | 404 | if (fh_to_close) { |
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| 405 | fclose(fh_to_close); |
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| 406 | fh_to_close = NULL; |
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| 407 | } |
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[6a4cdcb6] | 408 | } |
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[c648bd1] | 409 | #endif |
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[091069f] | 410 | |
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[98fd937] | 411 | MovieMaker::~MovieMaker() |
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| 412 | { |
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[40d1db36] | 413 | #ifdef WITH_FFMPEG |
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[98fd937] | 414 | release(); |
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[c648bd1] | 415 | #endif |
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[98fd937] | 416 | } |
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| 417 | |
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[091069f] | 418 | const char * |
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| 419 | MovieMaker::get_error_string() const |
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| 420 | { |
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[40d1db36] | 421 | #ifdef WITH_FFMPEG |
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[091069f] | 422 | switch (averrno) { |
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[63621a7] | 423 | case AVERROR(EIO): |
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[091069f] | 424 | return "I/O error"; |
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[63621a7] | 425 | case AVERROR(EDOM): |
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[091069f] | 426 | return "Number syntax expected in filename"; |
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| 427 | case AVERROR_INVALIDDATA: |
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| 428 | /* same as AVERROR_UNKNOWN: return "unknown error"; */ |
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| 429 | return "invalid data found"; |
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[63621a7] | 430 | case AVERROR(ENOMEM): |
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[091069f] | 431 | return "not enough memory"; |
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[63621a7] | 432 | case AVERROR(EILSEQ): |
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[091069f] | 433 | return "unknown format"; |
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[63621a7] | 434 | case AVERROR(ENOSYS): |
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[091069f] | 435 | return "Operation not supported"; |
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[63621a7] | 436 | case AVERROR(ENOENT): |
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[091069f] | 437 | return "No such file or directory"; |
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| 438 | case AVERROR_EOF: |
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| 439 | return "End of file"; |
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| 440 | case AVERROR_PATCHWELCOME: |
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| 441 | return "Not implemented in FFmpeg"; |
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| 442 | case 0: |
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| 443 | return "No error"; |
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| 444 | case MOVIE_NO_SUITABLE_FORMAT: |
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| 445 | return "Couldn't find a suitable output format"; |
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| 446 | case MOVIE_AUDIO_ONLY: |
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| 447 | return "Audio-only format specified"; |
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| 448 | case MOVIE_FILENAME_TOO_LONG: |
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| 449 | return "Filename too long"; |
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| 450 | } |
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[eac4514] | 451 | #endif |
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[f4e4b56] | 452 | return "Unknown error"; |
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[091069f] | 453 | } |
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[0aaa578] | 454 | |
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| 455 | #else |
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| 456 | |
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| 457 | #include "moviemaker-legacy.cc" |
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| 458 | |
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| 459 | #endif |
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