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/*
* Copyright 1994-2022 Olivier Girondel
*
* This file is part of lebiniou.
*
* lebiniou is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* lebiniou 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with lebiniou. If not, see <http://www.gnu.org/licenses/>.
*/
#include "context.h"
uint32_t options = BO_NONE;
uint32_t version = 0;
char desc[] = "MP4 video encoder";
#define FFMPEG_CHECK "ffmpeg -h >/dev/null 2>&1"
#define MP4_FFMPEG_CMD "ffmpeg -y -loglevel quiet -bitexact -framerate %d -vcodec ppm -f image2pipe -i pipe: -vcodec libx264 -crf %s -pix_fmt yuv420p \"%s\""
#define MP4_FFMPEG_CMD_AUDIO "ffmpeg -y -loglevel quiet -bitexact -framerate %d -vcodec ppm -f image2pipe -i pipe: -i \"%s\" -c:a libmp3lame -b:a %s -vcodec libx264 -crf %s -pix_fmt yuv420p \"%s\""
#define DIRECTORY "/mp4/"
static gchar *mp4_filename = NULL;
static FILE *mp4 = NULL;
extern uint8_t max_fps;
extern uint8_t encoding;
extern char *audio_file;
static gchar *
video_filename(void)
{
gchar *blah = NULL;
time_t s;
struct tm *now;
s = time(NULL);
now = localtime(&s);
blah = g_strdup_printf("%s/.%s/%s", g_get_home_dir(), PACKAGE_NAME, DIRECTORY);
g_mkdir_with_parents(blah, DIRECTORY_MODE);
g_free(blah);
if (NULL == audio_file) {
audio_file = getenv("LEBINIOU_SNDFILE");
}
if (NULL != audio_file) {
char *c;
audio_file = (NULL != (c = strrchr(audio_file, '/'))) ? ++c : audio_file;
(NULL != (c = strrchr(audio_file, '.'))) && (*c = '\0'); /* spr0tch */
}
blah = g_strdup_printf("%s/." PACKAGE_NAME DIRECTORY "%s-%04d-%02d-%02d_%02d-%02d-%02d.mp4",
g_get_home_dir(), (NULL != audio_file) ? audio_file : PACKAGE_NAME,
now->tm_year + 1900, now->tm_mon + 1, now->tm_mday,
now->tm_hour, now->tm_min, now->tm_sec);
VERBOSE(printf("[i] %s: encoding video to %s\n", __FILE__, blah));
return blah;
}
static int
open_mp4(Context_t *ctx)
{
if (NULL == audio_file) {
audio_file = getenv("LEBINIOU_SNDFILE");
}
char *mp4_crf = getenv("LEBINIOU_MP4_CRF");
if (NULL == mp4_crf) {
// use ffmpeg default
mp4_crf = "23";
}
char *audio_encoding_rate = getenv("LEBINIOU_MP4_AUDIO_ENCODING_RATE");
if (NULL == audio_encoding_rate) {
// use ffmpeg default
audio_encoding_rate = "128k";
}
// strdup() is needed because LEBINIOU_SNDFILE gets modified in video_filename()
char *audio = (NULL != audio_file) ? strdup(audio_file) : NULL;
char *env = getenv("LEBINIOU_MP4_FILENAME");
// strdup() is needed because mp4_filename is g_freed()
mp4_filename = (NULL != env) ? g_strdup(env) : video_filename();
gchar *cmd;
if (NULL != audio) {
cmd = g_strdup_printf(MP4_FFMPEG_CMD_AUDIO, max_fps, audio, audio_encoding_rate, mp4_crf, mp4_filename);
#ifdef DEBUG
fprintf(stderr, "%s:%s cmd= '%s'\n", __FILE__, __func__, cmd);
#endif
xfree(audio);
} else {
cmd = g_strdup_printf(MP4_FFMPEG_CMD, max_fps, mp4_crf, mp4_filename);
}
if (NULL == (mp4 = popen(cmd, "w"))) {
xperror("popen");
} else {
VERBOSE(printf("[i] %s: cmd= %s\n", __FILE__, cmd));
}
g_free(cmd);
return 1;
}
int8_t
create(Context_t *ctx)
{
if (check_command(FFMPEG_CHECK) == -1) {
printf("[!] %s: ffmpeg binary not found, can't create video\n", __FILE__);
return 0;
}
if (encoding) {
return open_mp4(ctx);
}
return 1;
}
void
destroy(Context_t *ctx)
{
if (NULL != mp4)
if (-1 == pclose(mp4)) {
fprintf(stderr, "[!] ");
perror("pclose");
}
if (NULL != mp4_filename) {
g_free(mp4_filename);
}
}
void
run(Context_t *ctx)
{
if (NULL != mp4) {
uint8_t *data;
char buff[MAXLEN+1];
size_t res;
/* get picture */
data = export_RGB_active_buffer(ctx, 1);
memset(&buff, '\0', MAXLEN+1);
g_snprintf(buff, MAXLEN, "P6 %d %d 255\n", WIDTH, HEIGHT);
/* PPM header */
res = fwrite((const void *)&buff, sizeof(char), strlen(buff), mp4);
if (res != strlen(buff)) {
fprintf(stderr, "[!] %s:write_header: short write (%zu of %d)\n", __FILE__, res, (int)strlen(buff));
exit(1);
}
/* PPM data */
res = fwrite((const void *)data, sizeof(Pixel_t), RGB_BUFFSIZE, mp4);
xfree(data);
if (res != RGB_BUFFSIZE) {
fprintf(stderr, "[!] %s:write_image: short write (%zu of %li)\n", __FILE__, res, RGB_BUFFSIZE);
exit(1);
}
fflush(mp4);
// dump screenshot for reproducibility test
if (NULL != getenv("LEBINIOU_DUMP_FRAMES")) {
Context_screenshot(ctx, 1);
}
}
}
json_t *
command(Context_t *ctx, const json_t *cmd)
{
json_t *res = NULL;
if (is_equal(json_string_value(cmd), "start_encoding")) {
if (NULL == mp4) {
encoding = 1;
open_mp4(ctx);
res = json_pack("{sb}", "encoding", encoding);
} else {
res = json_pack("{ss}", "error", "encoding in progress");
}
} else if (is_equal(json_string_value(cmd), "stop_encoding")) {
if (NULL != mp4) {
encoding = 0;
if (-1 == pclose(mp4)) {
xperror("pclose");
}
mp4 = NULL;
res = json_pack("{sb}", "encoding", encoding);
g_free(mp4_filename);
mp4_filename = NULL;
} else {
res = json_pack("{ss}", "error", "not encoding");
}
}
return res;
}
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