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4349 | Serge | 1 | /* |
2 | * Copyright (c) 2012 Paul B Mahol |
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3 | * |
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4 | * This file is part of FFmpeg. |
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5 | * |
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6 | * FFmpeg is free software; you can redistribute it and/or |
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7 | * modify it under the terms of the GNU Lesser General Public |
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8 | * License as published by the Free Software Foundation; either |
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9 | * version 2.1 of the License, or (at your option) any later version. |
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10 | * |
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11 | * FFmpeg is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | * Lesser General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU Lesser General Public |
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17 | * License along with FFmpeg; if not, write to the Free Software |
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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19 | */ |
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20 | |||
21 | #include |
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22 | #include "libavutil/opt.h" |
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23 | #include "libavutil/pixdesc.h" |
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24 | #include "avdevice.h" |
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25 | |||
26 | typedef struct CACAContext { |
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27 | AVClass *class; |
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28 | AVFormatContext *ctx; |
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29 | char *window_title; |
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30 | int window_width, window_height; |
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31 | |||
32 | caca_canvas_t *canvas; |
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33 | caca_display_t *display; |
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34 | caca_dither_t *dither; |
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35 | |||
36 | char *algorithm, *antialias; |
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37 | char *charset, *color; |
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38 | char *driver; |
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39 | |||
40 | char *list_dither; |
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41 | int list_drivers; |
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42 | } CACAContext; |
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43 | |||
44 | static int caca_write_trailer(AVFormatContext *s) |
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45 | { |
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46 | CACAContext *c = s->priv_data; |
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47 | |||
48 | av_freep(&c->window_title); |
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49 | |||
50 | if (c->display) { |
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51 | caca_free_display(c->display); |
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52 | c->display = NULL; |
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53 | } |
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54 | if (c->dither) { |
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55 | caca_free_dither(c->dither); |
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56 | c->dither = NULL; |
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57 | } |
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58 | if (c->canvas) { |
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59 | caca_free_canvas(c->canvas); |
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60 | c->canvas = NULL; |
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61 | } |
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62 | return 0; |
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63 | } |
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64 | |||
65 | static void list_drivers(CACAContext *c) |
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66 | { |
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67 | const char *const *drivers = caca_get_display_driver_list(); |
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68 | int i; |
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69 | |||
70 | av_log(c->ctx, AV_LOG_INFO, "Available drivers:\n"); |
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71 | for (i = 0; drivers[i]; i += 2) |
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72 | av_log(c->ctx, AV_LOG_INFO, "%s : %s\n", drivers[i], drivers[i + 1]); |
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73 | } |
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74 | |||
75 | #define DEFINE_LIST_DITHER(thing, thing_str) \ |
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76 | static void list_dither_## thing(CACAContext *c) \ |
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77 | { \ |
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78 | const char *const *thing = caca_get_dither_## thing ##_list(c->dither); \ |
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79 | int i; \ |
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80 | \ |
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81 | av_log(c->ctx, AV_LOG_INFO, "Available %s:\n", thing_str); \ |
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82 | for (i = 0; thing[i]; i += 2) \ |
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83 | av_log(c->ctx, AV_LOG_INFO, "%s : %s\n", thing[i], thing[i + 1]); \ |
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84 | } |
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85 | |||
86 | DEFINE_LIST_DITHER(color, "colors"); |
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87 | DEFINE_LIST_DITHER(charset, "charsets"); |
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88 | DEFINE_LIST_DITHER(algorithm, "algorithms"); |
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89 | DEFINE_LIST_DITHER(antialias, "antialias"); |
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90 | |||
91 | static int caca_write_header(AVFormatContext *s) |
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92 | { |
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93 | CACAContext *c = s->priv_data; |
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94 | AVStream *st = s->streams[0]; |
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95 | AVCodecContext *encctx = st->codec; |
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96 | int ret, bpp; |
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97 | |||
98 | c->ctx = s; |
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99 | if (c->list_drivers) { |
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100 | list_drivers(c); |
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101 | return AVERROR_EXIT; |
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102 | } |
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103 | if (c->list_dither) { |
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104 | if (!strcmp(c->list_dither, "colors")) { |
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105 | list_dither_color(c); |
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106 | } else if (!strcmp(c->list_dither, "charsets")) { |
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107 | list_dither_charset(c); |
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108 | } else if (!strcmp(c->list_dither, "algorithms")) { |
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109 | list_dither_algorithm(c); |
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110 | } else if (!strcmp(c->list_dither, "antialiases")) { |
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111 | list_dither_antialias(c); |
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112 | } else { |
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113 | av_log(s, AV_LOG_ERROR, |
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114 | "Invalid argument '%s', for 'list_dither' option\n" |
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115 | "Argument must be one of 'algorithms, 'antialiases', 'charsets', 'colors'\n", |
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116 | c->list_dither); |
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117 | return AVERROR(EINVAL); |
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118 | } |
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119 | return AVERROR_EXIT; |
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120 | } |
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121 | |||
122 | if ( s->nb_streams > 1 |
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123 | || encctx->codec_type != AVMEDIA_TYPE_VIDEO |
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124 | || encctx->codec_id != AV_CODEC_ID_RAWVIDEO) { |
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125 | av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n"); |
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126 | return AVERROR(EINVAL); |
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127 | } |
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128 | |||
129 | if (encctx->pix_fmt != AV_PIX_FMT_RGB24) { |
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130 | av_log(s, AV_LOG_ERROR, |
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131 | "Unsupported pixel format '%s', choose rgb24\n", |
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132 | av_get_pix_fmt_name(encctx->pix_fmt)); |
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133 | return AVERROR(EINVAL); |
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134 | } |
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135 | |||
136 | c->canvas = caca_create_canvas(c->window_width, c->window_height); |
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137 | if (!c->canvas) { |
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138 | av_log(s, AV_LOG_ERROR, "Failed to create canvas\n"); |
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139 | ret = AVERROR(errno); |
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140 | goto fail; |
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141 | } |
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142 | |||
143 | bpp = av_get_bits_per_pixel(av_pix_fmt_desc_get(encctx->pix_fmt)); |
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144 | c->dither = caca_create_dither(bpp, encctx->width, encctx->height, |
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145 | bpp / 8 * encctx->width, |
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146 | 0x0000ff, 0x00ff00, 0xff0000, 0); |
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147 | if (!c->dither) { |
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148 | av_log(s, AV_LOG_ERROR, "Failed to create dither\n"); |
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149 | ret = AVERROR(errno); |
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150 | goto fail; |
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151 | } |
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152 | |||
153 | #define CHECK_DITHER_OPT(opt) \ |
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154 | if (caca_set_dither_##opt(c->dither, c->opt) < 0) { \ |
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155 | ret = AVERROR(errno); \ |
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156 | av_log(s, AV_LOG_ERROR, "Failed to set value '%s' for option '%s'\n", \ |
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157 | c->opt, #opt); \ |
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158 | goto fail; \ |
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159 | } |
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160 | CHECK_DITHER_OPT(algorithm); |
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161 | CHECK_DITHER_OPT(antialias); |
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162 | CHECK_DITHER_OPT(charset); |
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163 | CHECK_DITHER_OPT(color); |
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164 | |||
165 | c->display = caca_create_display_with_driver(c->canvas, c->driver); |
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166 | if (!c->display) { |
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167 | av_log(s, AV_LOG_ERROR, "Failed to create display\n"); |
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168 | list_drivers(c); |
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169 | ret = AVERROR(errno); |
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170 | goto fail; |
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171 | } |
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172 | |||
173 | if (!c->window_width || !c->window_height) { |
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174 | c->window_width = caca_get_canvas_width(c->canvas); |
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175 | c->window_height = caca_get_canvas_height(c->canvas); |
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176 | } |
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177 | |||
178 | if (!c->window_title) |
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179 | c->window_title = av_strdup(s->filename); |
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180 | caca_set_display_title(c->display, c->window_title); |
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181 | caca_set_display_time(c->display, av_rescale_q(1, st->codec->time_base, AV_TIME_BASE_Q)); |
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182 | |||
183 | return 0; |
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184 | |||
185 | fail: |
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186 | caca_write_trailer(s); |
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187 | return ret; |
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188 | } |
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189 | |||
190 | static int caca_write_packet(AVFormatContext *s, AVPacket *pkt) |
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191 | { |
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192 | CACAContext *c = s->priv_data; |
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193 | |||
194 | caca_dither_bitmap(c->canvas, 0, 0, c->window_width, c->window_height, c->dither, pkt->data); |
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195 | caca_refresh_display(c->display); |
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196 | |||
197 | return 0; |
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198 | } |
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199 | |||
200 | #define OFFSET(x) offsetof(CACAContext,x) |
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201 | #define ENC AV_OPT_FLAG_ENCODING_PARAM |
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202 | |||
203 | static const AVOption options[] = { |
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204 | { "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL }, 0, 0, ENC}, |
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205 | { "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, ENC }, |
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206 | { "driver", "set display driver", OFFSET(driver), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, ENC }, |
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207 | { "algorithm", "set dithering algorithm", OFFSET(algorithm), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
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208 | { "antialias", "set antialias method", OFFSET(antialias), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
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209 | { "charset", "set charset used to render output", OFFSET(charset), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
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210 | { "color", "set color used to render output", OFFSET(color), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
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211 | { "list_drivers", "list available drivers", OFFSET(list_drivers), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, ENC, "list_drivers" }, |
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212 | { "true", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1}, 0, 0, ENC, "list_drivers" }, |
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213 | { "false", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0}, 0, 0, ENC, "list_drivers" }, |
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214 | { "list_dither", "list available dither options", OFFSET(list_dither), AV_OPT_TYPE_STRING, {.dbl=0}, 0, 1, ENC, "list_dither" }, |
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215 | { "algorithms", NULL, 0, AV_OPT_TYPE_CONST, {.str = "algorithms"}, 0, 0, ENC, "list_dither" }, |
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216 | { "antialiases", NULL, 0, AV_OPT_TYPE_CONST, {.str = "antialiases"},0, 0, ENC, "list_dither" }, |
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217 | { "charsets", NULL, 0, AV_OPT_TYPE_CONST, {.str = "charsets"}, 0, 0, ENC, "list_dither" }, |
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218 | { "colors", NULL, 0, AV_OPT_TYPE_CONST, {.str = "colors"}, 0, 0, ENC, "list_dither" }, |
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219 | { NULL }, |
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220 | }; |
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221 | |||
222 | static const AVClass caca_class = { |
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223 | .class_name = "caca_outdev", |
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224 | .item_name = av_default_item_name, |
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225 | .option = options, |
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226 | .version = LIBAVUTIL_VERSION_INT, |
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227 | }; |
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228 | |||
229 | AVOutputFormat ff_caca_muxer = { |
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230 | .name = "caca", |
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231 | .long_name = NULL_IF_CONFIG_SMALL("caca (color ASCII art) output device"), |
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232 | .priv_data_size = sizeof(CACAContext), |
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233 | .audio_codec = AV_CODEC_ID_NONE, |
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234 | .video_codec = AV_CODEC_ID_RAWVIDEO, |
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235 | .write_header = caca_write_header, |
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236 | .write_packet = caca_write_packet, |
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237 | .write_trailer = caca_write_trailer, |
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238 | .flags = AVFMT_NOFILE, |
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239 | .priv_class = &caca_class, |
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240 | };> |