2 * Copyright (c) 2012 Paul B Mahol
4 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/opt.h"
23 #include "libavutil/pixdesc.h"
26 typedef struct CACAContext {
30 int window_width, window_height;
32 caca_canvas_t *canvas;
33 caca_display_t *display;
34 caca_dither_t *dither;
36 char *algorithm, *antialias;
37 char *charset, *colors;
44 static int caca_write_trailer(AVFormatContext *s)
46 CACAContext *c = s->priv_data;
48 av_freep(&c->window_title);
50 caca_free_dither(c->dither);
51 caca_free_display(c->display);
52 caca_free_canvas(c->canvas);
56 static void list_drivers(CACAContext *c)
58 const char *const *drivers = caca_get_display_driver_list();
61 av_log(c->ctx, AV_LOG_INFO, "Available drivers:\n");
62 for (i = 0; drivers[i]; i += 2)
63 av_log(c->ctx, AV_LOG_INFO, "%s : %s\n", drivers[i], drivers[i + 1]);
66 #define DEFINE_LIST_DITHER(thing, thing_str) \
67 static void list_dither_## thing(CACAContext *c) \
69 const char *const *thing = caca_get_dither_## thing ##_list(c->dither); \
72 av_log(c->ctx, AV_LOG_INFO, "Available %s:\n", thing_str); \
73 for (i = 0; thing[i]; i += 2) \
74 av_log(c->ctx, AV_LOG_INFO, "%s : %s\n", thing[i], thing[i + 1]); \
77 DEFINE_LIST_DITHER(color, "colors");
78 DEFINE_LIST_DITHER(charset, "charsets");
79 DEFINE_LIST_DITHER(algorithm, "algorithms");
80 DEFINE_LIST_DITHER(antialias, "antialias");
82 static int caca_write_header(AVFormatContext *s)
84 CACAContext *c = s->priv_data;
85 AVStream *st = s->streams[0];
86 AVCodecContext *encctx = st->codec;
90 if (c->list_drivers) {
95 if (!strcmp(c->list_dither, "colors")) {
97 } else if (!strcmp(c->list_dither, "charsets")) {
98 list_dither_charset(c);
99 } else if (!strcmp(c->list_dither, "algorithms")) {
100 list_dither_algorithm(c);
101 } else if (!strcmp(c->list_dither, "antialiases")) {
102 list_dither_antialias(c);
104 av_log(s, AV_LOG_ERROR,
105 "Invalid value '%s', for 'list_dither' option\n",
107 return AVERROR(EINVAL);
112 if ( s->nb_streams > 1
113 || encctx->codec_type != AVMEDIA_TYPE_VIDEO
114 || encctx->codec_id != CODEC_ID_RAWVIDEO) {
115 av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n");
116 return AVERROR(EINVAL);
119 if (encctx->pix_fmt != PIX_FMT_RGB24) {
120 av_log(s, AV_LOG_ERROR,
121 "Unsupported pixel format '%s', choose rgb24\n",
122 av_get_pix_fmt_name(encctx->pix_fmt));
123 return AVERROR(EINVAL);
126 c->canvas = caca_create_canvas(c->window_width, c->window_height);
128 av_log(s, AV_LOG_ERROR, "Failed to create canvas\n");
129 return AVERROR(errno);
132 c->display = caca_create_display_with_driver(c->canvas, c->driver);
134 av_log(s, AV_LOG_ERROR, "Failed to create display\n");
136 caca_free_canvas(c->canvas);
137 return AVERROR(errno);
140 if (!c->window_width || !c->window_height) {
141 c->window_width = caca_get_canvas_width(c->canvas);
142 c->window_height = caca_get_canvas_height(c->canvas);
145 bpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[encctx->pix_fmt]);
146 c->dither = caca_create_dither(bpp, encctx->width, encctx->height,
147 bpp / 8 * encctx->width,
148 0x0000ff, 0x00ff00, 0xff0000, 0);
150 av_log(s, AV_LOG_ERROR, "Failed to create dither\n");
151 ret = AVERROR(errno);
155 ret = caca_set_dither_algorithm(c->dither, c->algorithm);
156 ret += caca_set_dither_antialias(c->dither, c->antialias);
157 ret += caca_set_dither_charset(c->dither, c->charset);
158 ret += caca_set_dither_color(c->dither, c->colors);
160 av_log(s, AV_LOG_ERROR, "Invalid value given to one of options\n");
161 ret = AVERROR(EINVAL);
165 if (!c->window_title)
166 c->window_title = av_strdup(s->filename);
167 caca_set_display_title(c->display, c->window_title);
168 caca_set_display_time(c->display, av_rescale_q(1, st->codec->time_base, AV_TIME_BASE_Q));
173 caca_write_trailer(s);
177 static int caca_write_packet(AVFormatContext *s, AVPacket *pkt)
179 CACAContext *c = s->priv_data;
181 caca_dither_bitmap(c->canvas, 0, 0, c->window_width, c->window_height, c->dither, pkt->data);
182 caca_refresh_display(c->display);
187 #define OFFSET(x) offsetof(CACAContext,x)
188 #define ENC AV_OPT_FLAG_ENCODING_PARAM
190 static const AVOption options[] = {
191 { "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL }, 0, 0, ENC},
192 { "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, ENC },
193 { "driver", "set display driver", OFFSET(driver), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, ENC },
194 { "algorithm", "set dithering algorithm", OFFSET(algorithm), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC },
195 { "antialias", "set antialias method", OFFSET(antialias), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC },
196 { "charset", "set charset used to render output", OFFSET(charset), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC },
197 { "colors", "set colors used to render output", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC },
198 { "list_drivers", "list available drivers", OFFSET(list_drivers), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1, ENC, "list_drivers" },
199 { "true", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = 1}, 0, 0, ENC, "list_drivers" },
200 { "false", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = 0}, 0, 0, ENC, "list_drivers" },
201 { "list_dither", "list available dither options", OFFSET(list_dither), AV_OPT_TYPE_STRING, {.dbl=0}, 0, 1, ENC, "list_dither" },
202 { "colors", NULL, 0, AV_OPT_TYPE_CONST, {.str = "colors"}, 0, 0, ENC, "list_dither" },
203 { "charsets", NULL, 0, AV_OPT_TYPE_CONST, {.str = "charsets"}, 0, 0, ENC, "list_dither" },
204 { "antialiases", NULL, 0, AV_OPT_TYPE_CONST, {.str = "antialiases"},0, 0, ENC, "list_dither" },
205 { "algorithms", NULL, 0, AV_OPT_TYPE_CONST, {.str = "algorithms"}, 0, 0, ENC, "list_dither" },
209 static const AVClass caca_class = {
210 .class_name = "caca_outdev",
211 .item_name = av_default_item_name,
213 .version = LIBAVUTIL_VERSION_INT,
216 AVOutputFormat ff_caca_muxer = {
218 .long_name = NULL_IF_CONFIG_SMALL("caca (color ASCII art) output device"),
219 .priv_data_size = sizeof(CACAContext),
220 .audio_codec = CODEC_ID_NONE,
221 .video_codec = CODEC_ID_RAWVIDEO,
222 .write_header = caca_write_header,
223 .write_packet = caca_write_packet,
224 .write_trailer = caca_write_trailer,
225 .flags = AVFMT_NOFILE,
226 .priv_class = &caca_class,