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libcaca output device

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This commit is contained in:
Paul B Mahol
2012-03-13 21:45:46 +00:00
parent 3c033d00f5
commit 296c1b6bd1
6 changed files with 296 additions and 1 deletions
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5
configure vendored
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@@ -173,6 +173,7 @@ External library support:
--enable-libaacplus enable AAC+ encoding via libaacplus [no]
--enable-libass enable libass subtitles rendering [no]
--enable-libbluray enable BluRay reading using libbluray [no]
--enable-libcaca enable textual display using libcaca
--enable-libcelt enable CELT decoding via libcelt [no]
--enable-libcdio enable audio CD grabbing with libcdio
--enable-libdc1394 enable IIDC-1394 grabbing using libdc1394
@@ -1051,6 +1052,7 @@ CONFIG_LIST="
libaacplus
libass
libbluray
libcaca
libcdio
libcelt
libdc1394
@@ -1693,6 +1695,7 @@ w64_demuxer_deps="wav_demuxer"
alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
alsa_outdev_deps="alsa_asoundlib_h"
bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
caca_outdev_deps="libcaca"
dshow_indev_deps="IBaseFilter"
dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
dv1394_indev_deps="dv1394 dv_demuxer"
@@ -3312,6 +3315,7 @@ enabled libbluray && require libbluray libbluray/bluray.h bd_open -lbluray
enabled libcelt && require libcelt celt/celt.h celt_decode -lcelt0 &&
{ check_lib celt/celt.h celt_decoder_create_custom -lcelt0 ||
die "ERROR: libcelt version must be >= 0.11.0."; }
enabled libcaca && require_pkg_config caca caca.h caca_create_canvas
enabled libfaac && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
enabled libfdk_aac && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
enabled libfreetype && require_pkg_config freetype2 "ft2build.h freetype/freetype.h" FT_Init_FreeType
@@ -3688,6 +3692,7 @@ echo "frei0r enabled ${frei0r-no}"
echo "gnutls enabled ${gnutls-no}"
echo "libaacplus enabled ${libaacplus-no}"
echo "libass enabled ${libass-no}"
echo "libcaca enabled ${libcaca-no}"
echo "libcdio support ${libcdio-no}"
echo "libcelt enabled ${libcelt-no}"
echo "libdc1394 support ${libdc1394-no}"

61
doc/outdevs.texi
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@@ -22,6 +22,67 @@ A description of the currently available output devices follows.
ALSA (Advanced Linux Sound Architecture) output device.
@section caca
CACA output device.
This output devices allows to show a video stream in CACA window.
Only one CACA window is allowed per application, so you can
have only one instance of this output device in an application.
To enable this output device you need to configure FFmpeg with
@code(--enable-libcaca).
libcaca is a graphics library that outputs text instead of pixels.
For more information about libcaca, check:
@url{http://caca.zoy.org/wiki/libcaca}
@subsection Options
@table @option
@item window_title
Set the CACA window title, if not specified default to the filename
specified for the output device.
@item window_size
Set the CACA window size, can be a string of the form
@var{width}x@var{height} or a video size abbreviation.
If not specified it defaults to the size of the input video.
@item driver
Set display driver.
@item algorithm
Set dithering algorithm. Dithering is necessary
because the picture being rendered has usually far more colours than
the available palette.
@item antialias
Set antialias method. Antialiasing smoothens the rendered
image and avoids the commonly seen staircase effect.
@item charset
Set which characters are going to be used when rendering text.
@item colors
Set colors to be used when rendering text.
@item list_drivers
List available drivers.
@item list_dither
List available dither options.
@end table
@subsection Examples
The following command shows the @command{ffmpeg} output is an
CACA window, forcing its size to 80x25:
@example
ffmpeg -i INPUT -vcodec rawvideo -pix_fmt rgb24 -window_size 80x25 -f caca -
@end example
@section oss
OSS (Open Sound System) output device.

1
libavdevice/Makefile
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@@ -16,6 +16,7 @@ OBJS-$(CONFIG_ALSA_INDEV) += alsa-audio-common.o \
OBJS-$(CONFIG_ALSA_OUTDEV) += alsa-audio-common.o \
alsa-audio-enc.o
OBJS-$(CONFIG_BKTR_INDEV) += bktr.o
OBJS-$(CONFIG_CACA_OUTDEV) += caca.o
OBJS-$(CONFIG_DSHOW_INDEV) += dshow.o dshow_enummediatypes.o \
dshow_enumpins.o dshow_filter.o \
dshow_pin.o dshow_common.o

1
libavdevice/alldevices.c
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@@ -40,6 +40,7 @@ void avdevice_register_all(void)
/* devices */
REGISTER_INOUTDEV (ALSA, alsa);
REGISTER_INDEV (BKTR, bktr);
REGISTER_OUTDEV (CACA, caca);
REGISTER_INDEV (DSHOW, dshow);
REGISTER_INDEV (DV1394, dv1394);
REGISTER_INDEV (FBDEV, fbdev);

227
libavdevice/caca.c Normal file
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@@ -0,0 +1,227 @@
/*
* 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/opt.h"
#include "libavutil/pixdesc.h"
#include "avdevice.h"
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, *colors;
char *driver;
char *list_dither;
int list_drivers;
} CACAContext;
static int caca_write_trailer(AVFormatContext *s)
{
CACAContext *c = s->priv_data;
av_freep(&c->window_title);
caca_free_dither(c->dither);
caca_free_display(c->display);
caca_free_canvas(c->canvas);
return 0;
}
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];
AVCodecContext *encctx = st->codec;
int ret, bpp;
c->ctx = s;
if (c->list_drivers) {
list_drivers(c);
return AVERROR_EXIT;
}
if (c->list_dither) {
if (!strcmp(c->list_dither, "colors")) {
list_dither_color(c);
} else if (!strcmp(c->list_dither, "charsets")) {
list_dither_charset(c);
} else if (!strcmp(c->list_dither, "algorithms")) {
list_dither_algorithm(c);
} else if (!strcmp(c->list_dither, "antialiases")) {
list_dither_antialias(c);
} else {
av_log(s, AV_LOG_ERROR,
"Invalid value '%s', for 'list_dither' option\n",
c->list_dither);
return AVERROR(EINVAL);
}
return AVERROR_EXIT;
}
if ( s->nb_streams > 1
|| encctx->codec_type != AVMEDIA_TYPE_VIDEO
|| encctx->codec_id != CODEC_ID_RAWVIDEO) {
av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n");
return AVERROR(EINVAL);
}
if (encctx->pix_fmt != PIX_FMT_RGB24) {
av_log(s, AV_LOG_ERROR,
"Unsupported pixel format '%s', choose rgb24\n",
av_get_pix_fmt_name(encctx->pix_fmt));
return AVERROR(EINVAL);
}
c->canvas = caca_create_canvas(c->window_width, c->window_height);
if (!c->canvas) {
av_log(s, AV_LOG_ERROR, "Failed to create canvas\n");
return AVERROR(errno);
}
c->display = caca_create_display_with_driver(c->canvas, c->driver);
if (!c->display) {
av_log(s, AV_LOG_ERROR, "Failed to create display\n");
list_drivers(c);
caca_free_canvas(c->canvas);
return AVERROR(errno);
}
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);
}
bpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[encctx->pix_fmt]);
c->dither = caca_create_dither(bpp, encctx->width, encctx->height,
bpp / 8 * encctx->width,
0x0000ff, 0x00ff00, 0xff0000, 0);
if (!c->dither) {
av_log(s, AV_LOG_ERROR, "Failed to create dither\n");
ret = AVERROR(errno);
goto fail;
}
ret = caca_set_dither_algorithm(c->dither, c->algorithm);
ret += caca_set_dither_antialias(c->dither, c->antialias);
ret += caca_set_dither_charset(c->dither, c->charset);
ret += caca_set_dither_color(c->dither, c->colors);
if (ret) {
av_log(s, AV_LOG_ERROR, "Invalid value given to one of options\n");
ret = AVERROR(EINVAL);
goto fail;
}
if (!c->window_title)
c->window_title = av_strdup(s->filename);
caca_set_display_title(c->display, c->window_title);
caca_set_display_time(c->display, av_rescale_q(1, st->codec->time_base, AV_TIME_BASE_Q));
return 0;
fail:
caca_write_trailer(s);
return ret;
}
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 },
{ "colors", "set colors used to render output", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC },
{ "list_drivers", "list available drivers", OFFSET(list_drivers), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1, ENC, "list_drivers" },
{ "true", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = 1}, 0, 0, ENC, "list_drivers" },
{ "false", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = 0}, 0, 0, ENC, "list_drivers" },
{ "list_dither", "list available dither options", OFFSET(list_dither), AV_OPT_TYPE_STRING, {.dbl=0}, 0, 1, ENC, "list_dither" },
{ "colors", NULL, 0, AV_OPT_TYPE_CONST, {.str = "colors"}, 0, 0, ENC, "list_dither" },
{ "charsets", NULL, 0, AV_OPT_TYPE_CONST, {.str = "charsets"}, 0, 0, ENC, "list_dither" },
{ "antialiases", NULL, 0, AV_OPT_TYPE_CONST, {.str = "antialiases"},0, 0, ENC, "list_dither" },
{ "algorithms", NULL, 0, AV_OPT_TYPE_CONST, {.str = "algorithms"}, 0, 0, ENC, "list_dither" },
{ NULL },
};
static const AVClass caca_class = {
.class_name = "caca_outdev",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_caca_muxer = {
.name = "caca",
.long_name = NULL_IF_CONFIG_SMALL("caca (color ASCII art) output device"),
.priv_data_size = sizeof(CACAContext),
.audio_codec = CODEC_ID_NONE,
.video_codec = CODEC_ID_RAWVIDEO,
.write_header = caca_write_header,
.write_packet = caca_write_packet,
.write_trailer = caca_write_trailer,
.flags = AVFMT_NOFILE,
.priv_class = &caca_class,
};

2
libavdevice/version.h
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@@ -28,7 +28,7 @@
#include "libavutil/avutil.h"
#define LIBAVDEVICE_VERSION_MAJOR 54
#define LIBAVDEVICE_VERSION_MINOR 1
#define LIBAVDEVICE_VERSION_MINOR 2
#define LIBAVDEVICE_VERSION_MICRO 100
#define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \