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FFmpeg/libavdevice/caca.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

237 lines
8.7 KiB
C

/*
* Copyright (c) 2012 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <caca.h>
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavformat/mux.h"
#include "avdevice.h"
enum {
LIST_ALGORITHMS = 1 << 0,
LIST_ANTIALIASES = 1 << 1,
LIST_CHARSETS = 1 << 2,
LIST_COLORS = 1 << 3,
};
typedef struct CACAContext {
AVClass *class;
AVFormatContext *ctx;
char *window_title;
int window_width, window_height;
caca_canvas_t *canvas;
caca_display_t *display;
caca_dither_t *dither;
char *algorithm, *antialias;
char *charset, *color;
char *driver;
int list_dither;
int list_drivers;
} CACAContext;
static void caca_deinit(AVFormatContext *s)
{
CACAContext *c = s->priv_data;
if (c->display) {
caca_free_display(c->display);
c->display = NULL;
}
if (c->dither) {
caca_free_dither(c->dither);
c->dither = NULL;
}
if (c->canvas) {
caca_free_canvas(c->canvas);
c->canvas = NULL;
}
}
static void list_drivers(CACAContext *c)
{
const char *const *drivers = caca_get_display_driver_list();
int i;
av_log(c->ctx, AV_LOG_INFO, "Available drivers:\n");
for (i = 0; drivers[i]; i += 2)
av_log(c->ctx, AV_LOG_INFO, "%s: %s\n", drivers[i], drivers[i + 1]);
}
#define DEFINE_LIST_DITHER(thing, thing_str) \
static void list_dither_## thing(CACAContext *c) \
{ \
const char *const *thing = caca_get_dither_## thing ##_list(c->dither); \
int i; \
\
av_log(c->ctx, AV_LOG_INFO, "Available %s:\n", thing_str); \
for (i = 0; thing[i]; i += 2) \
av_log(c->ctx, AV_LOG_INFO, "%s: %s\n", thing[i], thing[i + 1]); \
}
DEFINE_LIST_DITHER(color, "colors");
DEFINE_LIST_DITHER(charset, "charsets");
DEFINE_LIST_DITHER(algorithm, "algorithms");
DEFINE_LIST_DITHER(antialias, "antialias");
static int caca_write_header(AVFormatContext *s)
{
CACAContext *c = s->priv_data;
AVStream *st = s->streams[0];
AVCodecParameters *encctx = st->codecpar;
int ret, bpp;
c->ctx = s;
if (c->list_drivers) {
list_drivers(c);
return AVERROR_EXIT;
}
if (c->list_dither) {
if (c->list_dither & LIST_COLORS)
list_dither_color(c);
if (c->list_dither & LIST_CHARSETS)
list_dither_charset(c);
if (c->list_dither & LIST_ALGORITHMS)
list_dither_algorithm(c);
if (c->list_dither & LIST_ANTIALIASES)
list_dither_antialias(c);
return AVERROR_EXIT;
}
if ( s->nb_streams > 1
|| encctx->codec_type != AVMEDIA_TYPE_VIDEO
|| encctx->codec_id != AV_CODEC_ID_RAWVIDEO) {
av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n");
return AVERROR(EINVAL);
}
if (encctx->format != AV_PIX_FMT_RGB24) {
av_log(s, AV_LOG_ERROR,
"Unsupported pixel format '%s', choose rgb24\n",
av_get_pix_fmt_name(encctx->format));
return AVERROR(EINVAL);
}
c->canvas = caca_create_canvas(c->window_width, c->window_height);
if (!c->canvas) {
ret = AVERROR(errno);
av_log(s, AV_LOG_ERROR, "Failed to create canvas\n");
return ret;
}
bpp = av_get_bits_per_pixel(av_pix_fmt_desc_get(encctx->format));
c->dither = caca_create_dither(bpp, encctx->width, encctx->height,
bpp / 8 * encctx->width,
0x0000ff, 0x00ff00, 0xff0000, 0);
if (!c->dither) {
ret = AVERROR(errno);
av_log(s, AV_LOG_ERROR, "Failed to create dither\n");
return ret;
}
#define CHECK_DITHER_OPT(opt) do { \
if (caca_set_dither_##opt(c->dither, c->opt) < 0) { \
ret = AVERROR(errno); \
av_log(s, AV_LOG_ERROR, "Failed to set value '%s' for option '%s'\n", \
c->opt, #opt); \
return ret; \
} \
} while (0)
CHECK_DITHER_OPT(algorithm);
CHECK_DITHER_OPT(antialias);
CHECK_DITHER_OPT(charset);
CHECK_DITHER_OPT(color);
c->display = caca_create_display_with_driver(c->canvas, c->driver);
if (!c->display) {
ret = AVERROR(errno);
av_log(s, AV_LOG_ERROR, "Failed to create display\n");
list_drivers(c);
return ret;
}
if (!c->window_width || !c->window_height) {
c->window_width = caca_get_canvas_width(c->canvas);
c->window_height = caca_get_canvas_height(c->canvas);
}
if (!c->window_title)
c->window_title = av_strdup(s->url);
caca_set_display_title(c->display, c->window_title);
caca_set_display_time(c->display, av_rescale_q(1, st->time_base, AV_TIME_BASE_Q));
return 0;
}
static int caca_write_packet(AVFormatContext *s, AVPacket *pkt)
{
CACAContext *c = s->priv_data;
caca_dither_bitmap(c->canvas, 0, 0, c->window_width, c->window_height, c->dither, pkt->data);
caca_refresh_display(c->display);
return 0;
}
#define OFFSET(x) offsetof(CACAContext,x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL }, 0, 0, ENC},
{ "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, ENC },
{ "driver", "set display driver", OFFSET(driver), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, ENC },
{ "algorithm", "set dithering algorithm", OFFSET(algorithm), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC },
{ "antialias", "set antialias method", OFFSET(antialias), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC },
{ "charset", "set charset used to render output", OFFSET(charset), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC },
{ "color", "set color used to render output", OFFSET(color), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC },
{ "list_drivers", "list available drivers", OFFSET(list_drivers), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, ENC },
{ "list_dither", "list available dither options", OFFSET(list_dither), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX, ENC, .unit = "list_dither" },
{ "algorithms", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = LIST_ALGORITHMS }, 0, 0, ENC, .unit = "list_dither" },
{ "antialiases", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = LIST_ANTIALIASES }, 0, 0, ENC, .unit = "list_dither" },
{ "charsets", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = LIST_CHARSETS }, 0, 0, ENC, .unit = "list_dither" },
{ "colors", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = LIST_COLORS }, 0, 0, ENC, .unit = "list_dither" },
{ NULL },
};
static const AVClass caca_class = {
.class_name = "caca outdev",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
};
const FFOutputFormat ff_caca_muxer = {
.p.name = "caca",
.p.long_name = NULL_IF_CONFIG_SMALL("caca (color ASCII art) output device"),
.priv_data_size = sizeof(CACAContext),
.p.audio_codec = AV_CODEC_ID_NONE,
.p.video_codec = AV_CODEC_ID_RAWVIDEO,
.write_header = caca_write_header,
.write_packet = caca_write_packet,
.deinit = caca_deinit,
.p.flags = AVFMT_NOFILE,
.p.priv_class = &caca_class,
};