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/*
* probe_ffmpeg.c -- libavcodec/libavformat based probing code
* (C) 2006-2010 Francesco Romani <fromani -at- gmail -dot- com>
*
* This file is part of transcode, a video stream processing tool.
*
* transcode 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.
*
* transcode 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "transcode.h"
#include "tcinfo.h"
#include "ioaux.h"
#include "tc.h"
#include "libtc/libtc.h"
#include "libtc/ratiocodes.h"
#ifdef HAVE_FFMPEG
#include "libtc/tcavcodec.h"
static void translate_info(const AVFormatContext *ctx, ProbeInfo *info)
{
AVStream *st = NULL;
int i = 0, j = 0;
if (ctx == NULL || info == NULL) {
return;
}
/* first of all, video */
for (i = 0; i < ctx->nb_streams; i++) {
st = ctx->streams[i];
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
info->bitrate = st->codec->bit_rate / 1000;
info->width = st->codec->width;
info->height = st->codec->height;
if (st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0) {
info->fps = av_q2d(st->avg_frame_rate);
} else {
/* watch out here */
info->fps = 1.0/av_q2d(st->codec->time_base);
}
tc_frc_code_from_value(&info->frc, info->fps);
break;
}
}
/* then audio track(s) */
for (i = 0; i < ctx->nb_streams; i++) {
st = ctx->streams[i];
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO
&& j < TC_MAX_AUD_TRACKS) {
info->track[j].format = 0x1; /* known wrong */
info->track[j].chan = st->codec->channels;
info->track[j].samplerate = st->codec->sample_rate;
info->track[j].bitrate = st->codec->bit_rate / 1000;
/* XXX: known wrong for PCM */
info->track[j].bits = BITS;
/*
* XXX where libavcodec/libaformat provide this?
* Should be inferred by CODEC_ID used?
* */
info->track[j].pts_start = 0; /* XXX: ?!? */
j++;
}
}
info->num_tracks = j;
}
void probe_ffmpeg(info_t *ipipe)
{
/* to be completed */
AVFormatContext *lavf_dmx_context = NULL;
int ret = 0;
close(ipipe->fd_in);
TC_INIT_LIBAVCODEC;
ret = avformat_open_input(&lavf_dmx_context, ipipe->name,
NULL, NULL);
if (ret != 0) {
tc_log_error(__FILE__, "unable to open '%s'"
" (libavformat failure)",
ipipe->name);
ipipe->error = 1;
return;
}
ret = avformat_find_stream_info(lavf_dmx_context, NULL);
if (ret < 0) {
tc_log_error(__FILE__, "unable to fetch informations from '%s'"
" (libavformat failure)",
ipipe->name);
ipipe->error = 1;
return;
}
translate_info(lavf_dmx_context, ipipe->probe_info);
avformat_close_input(&lavf_dmx_context);
return;
}
#else // HAVE_FFMPEG
void probe_ffmpeg(info_t *ipipe)
{
tc_log_error(__FILE__, "no support for FFmpeg compiled - exit.");
ipipe->error = 1;
return;
}
#endif // HAVE_FFMPEG
/*************************************************************************/
/*
* Local variables:
* c-file-style: "stroustrup"
* c-file-offsets: ((case-label . *) (statement-case-intro . *))
* indent-tabs-mode: nil
* End:
*
* vim: expandtab shiftwidth=4:
*/
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