blob: 93cc0ffd252e9cf50ee1cc757df1f431f20eaa57
1 | /* |
2 | * Copyright (c) 2012 Paul B Mahol |
3 | * |
4 | * This file is part of FFmpeg. |
5 | * |
6 | * FFmpeg is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU Lesser General Public |
8 | * License as published by the Free Software Foundation; either |
9 | * version 2.1 of the License, or (at your option) any later version. |
10 | * |
11 | * FFmpeg is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | * Lesser General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU Lesser General Public |
17 | * License along with FFmpeg; if not, write to the Free Software |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | */ |
20 | |
21 | #include <caca.h> |
22 | #include "libavutil/opt.h" |
23 | #include "libavutil/pixdesc.h" |
24 | #include "avdevice.h" |
25 | |
26 | typedef struct CACAContext { |
27 | AVClass *class; |
28 | AVFormatContext *ctx; |
29 | char *window_title; |
30 | int window_width, window_height; |
31 | |
32 | caca_canvas_t *canvas; |
33 | caca_display_t *display; |
34 | caca_dither_t *dither; |
35 | |
36 | char *algorithm, *antialias; |
37 | char *charset, *color; |
38 | char *driver; |
39 | |
40 | char *list_dither; |
41 | int list_drivers; |
42 | } CACAContext; |
43 | |
44 | static int caca_write_trailer(AVFormatContext *s) |
45 | { |
46 | CACAContext *c = s->priv_data; |
47 | |
48 | av_freep(&c->window_title); |
49 | |
50 | if (c->display) { |
51 | caca_free_display(c->display); |
52 | c->display = NULL; |
53 | } |
54 | if (c->dither) { |
55 | caca_free_dither(c->dither); |
56 | c->dither = NULL; |
57 | } |
58 | if (c->canvas) { |
59 | caca_free_canvas(c->canvas); |
60 | c->canvas = NULL; |
61 | } |
62 | return 0; |
63 | } |
64 | |
65 | static void list_drivers(CACAContext *c) |
66 | { |
67 | const char *const *drivers = caca_get_display_driver_list(); |
68 | int i; |
69 | |
70 | av_log(c->ctx, AV_LOG_INFO, "Available drivers:\n"); |
71 | for (i = 0; drivers[i]; i += 2) |
72 | av_log(c->ctx, AV_LOG_INFO, "%s: %s\n", drivers[i], drivers[i + 1]); |
73 | } |
74 | |
75 | #define DEFINE_LIST_DITHER(thing, thing_str) \ |
76 | static void list_dither_## thing(CACAContext *c) \ |
77 | { \ |
78 | const char *const *thing = caca_get_dither_## thing ##_list(c->dither); \ |
79 | int i; \ |
80 | \ |
81 | av_log(c->ctx, AV_LOG_INFO, "Available %s:\n", thing_str); \ |
82 | for (i = 0; thing[i]; i += 2) \ |
83 | av_log(c->ctx, AV_LOG_INFO, "%s: %s\n", thing[i], thing[i + 1]); \ |
84 | } |
85 | |
86 | DEFINE_LIST_DITHER(color, "colors"); |
87 | DEFINE_LIST_DITHER(charset, "charsets"); |
88 | DEFINE_LIST_DITHER(algorithm, "algorithms"); |
89 | DEFINE_LIST_DITHER(antialias, "antialias"); |
90 | |
91 | static int caca_write_header(AVFormatContext *s) |
92 | { |
93 | CACAContext *c = s->priv_data; |
94 | AVStream *st = s->streams[0]; |
95 | AVCodecParameters *encctx = st->codecpar; |
96 | int ret, bpp; |
97 | |
98 | c->ctx = s; |
99 | if (c->list_drivers) { |
100 | list_drivers(c); |
101 | return AVERROR_EXIT; |
102 | } |
103 | if (c->list_dither) { |
104 | if (!strcmp(c->list_dither, "colors")) { |
105 | list_dither_color(c); |
106 | } else if (!strcmp(c->list_dither, "charsets")) { |
107 | list_dither_charset(c); |
108 | } else if (!strcmp(c->list_dither, "algorithms")) { |
109 | list_dither_algorithm(c); |
110 | } else if (!strcmp(c->list_dither, "antialiases")) { |
111 | list_dither_antialias(c); |
112 | } else { |
113 | av_log(s, AV_LOG_ERROR, |
114 | "Invalid argument '%s', for 'list_dither' option\n" |
115 | "Argument must be one of 'algorithms, 'antialiases', 'charsets', 'colors'\n", |
116 | c->list_dither); |
117 | return AVERROR(EINVAL); |
118 | } |
119 | return AVERROR_EXIT; |
120 | } |
121 | |
122 | if ( s->nb_streams > 1 |
123 | || encctx->codec_type != AVMEDIA_TYPE_VIDEO |
124 | || encctx->codec_id != AV_CODEC_ID_RAWVIDEO) { |
125 | av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n"); |
126 | return AVERROR(EINVAL); |
127 | } |
128 | |
129 | if (encctx->format != AV_PIX_FMT_RGB24) { |
130 | av_log(s, AV_LOG_ERROR, |
131 | "Unsupported pixel format '%s', choose rgb24\n", |
132 | av_get_pix_fmt_name(encctx->format)); |
133 | return AVERROR(EINVAL); |
134 | } |
135 | |
136 | c->canvas = caca_create_canvas(c->window_width, c->window_height); |
137 | if (!c->canvas) { |
138 | ret = AVERROR(errno); |
139 | av_log(s, AV_LOG_ERROR, "Failed to create canvas\n"); |
140 | goto fail; |
141 | } |
142 | |
143 | bpp = av_get_bits_per_pixel(av_pix_fmt_desc_get(encctx->format)); |
144 | c->dither = caca_create_dither(bpp, encctx->width, encctx->height, |
145 | bpp / 8 * encctx->width, |
146 | 0x0000ff, 0x00ff00, 0xff0000, 0); |
147 | if (!c->dither) { |
148 | ret = AVERROR(errno); |
149 | av_log(s, AV_LOG_ERROR, "Failed to create dither\n"); |
150 | goto fail; |
151 | } |
152 | |
153 | #define CHECK_DITHER_OPT(opt) do { \ |
154 | if (caca_set_dither_##opt(c->dither, c->opt) < 0) { \ |
155 | ret = AVERROR(errno); \ |
156 | av_log(s, AV_LOG_ERROR, "Failed to set value '%s' for option '%s'\n", \ |
157 | c->opt, #opt); \ |
158 | goto fail; \ |
159 | } \ |
160 | } while (0) |
161 | |
162 | CHECK_DITHER_OPT(algorithm); |
163 | CHECK_DITHER_OPT(antialias); |
164 | CHECK_DITHER_OPT(charset); |
165 | CHECK_DITHER_OPT(color); |
166 | |
167 | c->display = caca_create_display_with_driver(c->canvas, c->driver); |
168 | if (!c->display) { |
169 | ret = AVERROR(errno); |
170 | av_log(s, AV_LOG_ERROR, "Failed to create display\n"); |
171 | list_drivers(c); |
172 | goto fail; |
173 | } |
174 | |
175 | if (!c->window_width || !c->window_height) { |
176 | c->window_width = caca_get_canvas_width(c->canvas); |
177 | c->window_height = caca_get_canvas_height(c->canvas); |
178 | } |
179 | |
180 | if (!c->window_title) |
181 | c->window_title = av_strdup(s->filename); |
182 | caca_set_display_title(c->display, c->window_title); |
183 | caca_set_display_time(c->display, av_rescale_q(1, st->codec->time_base, AV_TIME_BASE_Q)); |
184 | |
185 | return 0; |
186 | |
187 | fail: |
188 | caca_write_trailer(s); |
189 | return ret; |
190 | } |
191 | |
192 | static int caca_write_packet(AVFormatContext *s, AVPacket *pkt) |
193 | { |
194 | CACAContext *c = s->priv_data; |
195 | |
196 | caca_dither_bitmap(c->canvas, 0, 0, c->window_width, c->window_height, c->dither, pkt->data); |
197 | caca_refresh_display(c->display); |
198 | |
199 | return 0; |
200 | } |
201 | |
202 | #define OFFSET(x) offsetof(CACAContext,x) |
203 | #define ENC AV_OPT_FLAG_ENCODING_PARAM |
204 | |
205 | static const AVOption options[] = { |
206 | { "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL }, 0, 0, ENC}, |
207 | { "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, ENC }, |
208 | { "driver", "set display driver", OFFSET(driver), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, ENC }, |
209 | { "algorithm", "set dithering algorithm", OFFSET(algorithm), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
210 | { "antialias", "set antialias method", OFFSET(antialias), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
211 | { "charset", "set charset used to render output", OFFSET(charset), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
212 | { "color", "set color used to render output", OFFSET(color), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
213 | { "list_drivers", "list available drivers", OFFSET(list_drivers), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, ENC }, |
214 | { "list_dither", "list available dither options", OFFSET(list_dither), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 1, ENC, "list_dither" }, |
215 | { "algorithms", NULL, 0, AV_OPT_TYPE_CONST, {.str = "algorithms"}, 0, 0, ENC, "list_dither" }, |
216 | { "antialiases", NULL, 0, AV_OPT_TYPE_CONST, {.str = "antialiases"},0, 0, ENC, "list_dither" }, |
217 | { "charsets", NULL, 0, AV_OPT_TYPE_CONST, {.str = "charsets"}, 0, 0, ENC, "list_dither" }, |
218 | { "colors", NULL, 0, AV_OPT_TYPE_CONST, {.str = "colors"}, 0, 0, ENC, "list_dither" }, |
219 | { NULL }, |
220 | }; |
221 | |
222 | static const AVClass caca_class = { |
223 | .class_name = "caca_outdev", |
224 | .item_name = av_default_item_name, |
225 | .option = options, |
226 | .version = LIBAVUTIL_VERSION_INT, |
227 | .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT, |
228 | }; |
229 | |
230 | AVOutputFormat ff_caca_muxer = { |
231 | .name = "caca", |
232 | .long_name = NULL_IF_CONFIG_SMALL("caca (color ASCII art) output device"), |
233 | .priv_data_size = sizeof(CACAContext), |
234 | .audio_codec = AV_CODEC_ID_NONE, |
235 | .video_codec = AV_CODEC_ID_RAWVIDEO, |
236 | .write_header = caca_write_header, |
237 | .write_packet = caca_write_packet, |
238 | .write_trailer = caca_write_trailer, |
239 | .flags = AVFMT_NOFILE, |
240 | .priv_class = &caca_class, |
241 | }; |
242 |