mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
13 years ago
parent
3c033d00f5
commit
296c1b6bd1
6 changed files with 296 additions and 1 deletions
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/*
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* Copyright (c) 2012 Paul B Mahol |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <caca.h> |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "avdevice.h" |
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typedef struct CACAContext { |
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AVClass *class; |
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AVFormatContext *ctx; |
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char *window_title; |
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int window_width, window_height; |
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caca_canvas_t *canvas; |
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caca_display_t *display; |
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caca_dither_t *dither; |
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char *algorithm, *antialias; |
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char *charset, *colors; |
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char *driver; |
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char *list_dither; |
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int list_drivers; |
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} CACAContext; |
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static int caca_write_trailer(AVFormatContext *s) |
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{ |
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CACAContext *c = s->priv_data; |
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av_freep(&c->window_title); |
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caca_free_dither(c->dither); |
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caca_free_display(c->display); |
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caca_free_canvas(c->canvas); |
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return 0; |
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} |
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static void list_drivers(CACAContext *c) |
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{ |
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const char *const *drivers = caca_get_display_driver_list(); |
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int i; |
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av_log(c->ctx, AV_LOG_INFO, "Available drivers:\n"); |
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for (i = 0; drivers[i]; i += 2) |
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av_log(c->ctx, AV_LOG_INFO, "%s : %s\n", drivers[i], drivers[i + 1]); |
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} |
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#define DEFINE_LIST_DITHER(thing, thing_str) \ |
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static void list_dither_## thing(CACAContext *c) \
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{ \
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const char *const *thing = caca_get_dither_## thing ##_list(c->dither); \
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int i; \
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\
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av_log(c->ctx, AV_LOG_INFO, "Available %s:\n", thing_str); \
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for (i = 0; thing[i]; i += 2) \
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av_log(c->ctx, AV_LOG_INFO, "%s : %s\n", thing[i], thing[i + 1]); \
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} |
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DEFINE_LIST_DITHER(color, "colors"); |
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DEFINE_LIST_DITHER(charset, "charsets"); |
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DEFINE_LIST_DITHER(algorithm, "algorithms"); |
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DEFINE_LIST_DITHER(antialias, "antialias"); |
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static int caca_write_header(AVFormatContext *s) |
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{ |
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CACAContext *c = s->priv_data; |
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AVStream *st = s->streams[0]; |
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AVCodecContext *encctx = st->codec; |
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int ret, bpp; |
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c->ctx = s; |
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if (c->list_drivers) { |
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list_drivers(c); |
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return AVERROR_EXIT; |
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} |
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if (c->list_dither) { |
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if (!strcmp(c->list_dither, "colors")) { |
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list_dither_color(c); |
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} else if (!strcmp(c->list_dither, "charsets")) { |
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list_dither_charset(c); |
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} else if (!strcmp(c->list_dither, "algorithms")) { |
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list_dither_algorithm(c); |
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} else if (!strcmp(c->list_dither, "antialiases")) { |
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list_dither_antialias(c); |
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} else { |
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av_log(s, AV_LOG_ERROR, |
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"Invalid value '%s', for 'list_dither' option\n", |
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c->list_dither); |
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return AVERROR(EINVAL); |
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} |
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return AVERROR_EXIT; |
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} |
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if ( s->nb_streams > 1 |
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|| encctx->codec_type != AVMEDIA_TYPE_VIDEO |
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|| encctx->codec_id != CODEC_ID_RAWVIDEO) { |
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av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n"); |
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return AVERROR(EINVAL); |
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} |
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if (encctx->pix_fmt != PIX_FMT_RGB24) { |
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av_log(s, AV_LOG_ERROR, |
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"Unsupported pixel format '%s', choose rgb24\n", |
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av_get_pix_fmt_name(encctx->pix_fmt)); |
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return AVERROR(EINVAL); |
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} |
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c->canvas = caca_create_canvas(c->window_width, c->window_height); |
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if (!c->canvas) { |
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av_log(s, AV_LOG_ERROR, "Failed to create canvas\n"); |
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return AVERROR(errno); |
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} |
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c->display = caca_create_display_with_driver(c->canvas, c->driver); |
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if (!c->display) { |
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av_log(s, AV_LOG_ERROR, "Failed to create display\n"); |
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list_drivers(c); |
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caca_free_canvas(c->canvas); |
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return AVERROR(errno); |
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} |
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if (!c->window_width || !c->window_height) { |
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c->window_width = caca_get_canvas_width(c->canvas); |
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c->window_height = caca_get_canvas_height(c->canvas); |
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} |
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bpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[encctx->pix_fmt]); |
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c->dither = caca_create_dither(bpp, encctx->width, encctx->height, |
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bpp / 8 * encctx->width, |
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0x0000ff, 0x00ff00, 0xff0000, 0); |
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if (!c->dither) { |
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av_log(s, AV_LOG_ERROR, "Failed to create dither\n"); |
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ret = AVERROR(errno); |
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goto fail; |
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} |
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ret = caca_set_dither_algorithm(c->dither, c->algorithm); |
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ret += caca_set_dither_antialias(c->dither, c->antialias); |
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ret += caca_set_dither_charset(c->dither, c->charset); |
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ret += caca_set_dither_color(c->dither, c->colors); |
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if (ret) { |
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av_log(s, AV_LOG_ERROR, "Invalid value given to one of options\n"); |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
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if (!c->window_title) |
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c->window_title = av_strdup(s->filename); |
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caca_set_display_title(c->display, c->window_title); |
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caca_set_display_time(c->display, av_rescale_q(1, st->codec->time_base, AV_TIME_BASE_Q)); |
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return 0; |
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fail: |
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caca_write_trailer(s); |
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return ret; |
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} |
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static int caca_write_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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CACAContext *c = s->priv_data; |
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caca_dither_bitmap(c->canvas, 0, 0, c->window_width, c->window_height, c->dither, pkt->data); |
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caca_refresh_display(c->display); |
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return 0; |
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} |
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#define OFFSET(x) offsetof(CACAContext,x) |
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#define ENC AV_OPT_FLAG_ENCODING_PARAM |
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static const AVOption options[] = { |
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{ "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL }, 0, 0, ENC}, |
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{ "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, ENC }, |
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{ "driver", "set display driver", OFFSET(driver), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, ENC }, |
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{ "algorithm", "set dithering algorithm", OFFSET(algorithm), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
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{ "antialias", "set antialias method", OFFSET(antialias), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
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{ "charset", "set charset used to render output", OFFSET(charset), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
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{ "colors", "set colors used to render output", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "default" }, 0, 0, ENC }, |
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{ "list_drivers", "list available drivers", OFFSET(list_drivers), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1, ENC, "list_drivers" }, |
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{ "true", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = 1}, 0, 0, ENC, "list_drivers" }, |
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{ "false", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = 0}, 0, 0, ENC, "list_drivers" }, |
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{ "list_dither", "list available dither options", OFFSET(list_dither), AV_OPT_TYPE_STRING, {.dbl=0}, 0, 1, ENC, "list_dither" }, |
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{ "colors", NULL, 0, AV_OPT_TYPE_CONST, {.str = "colors"}, 0, 0, ENC, "list_dither" }, |
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{ "charsets", NULL, 0, AV_OPT_TYPE_CONST, {.str = "charsets"}, 0, 0, ENC, "list_dither" }, |
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{ "antialiases", NULL, 0, AV_OPT_TYPE_CONST, {.str = "antialiases"},0, 0, ENC, "list_dither" }, |
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{ "algorithms", NULL, 0, AV_OPT_TYPE_CONST, {.str = "algorithms"}, 0, 0, ENC, "list_dither" }, |
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{ NULL }, |
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}; |
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static const AVClass caca_class = { |
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.class_name = "caca_outdev", |
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.item_name = av_default_item_name, |
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.option = options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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AVOutputFormat ff_caca_muxer = { |
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.name = "caca", |
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.long_name = NULL_IF_CONFIG_SMALL("caca (color ASCII art) output device"), |
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.priv_data_size = sizeof(CACAContext), |
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.audio_codec = CODEC_ID_NONE, |
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.video_codec = CODEC_ID_RAWVIDEO, |
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.write_header = caca_write_header, |
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.write_packet = caca_write_packet, |
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.write_trailer = caca_write_trailer, |
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.flags = AVFMT_NOFILE, |
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.priv_class = &caca_class, |
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}; |
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