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150 lines
4.0 KiB
150 lines
4.0 KiB
/*
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* probe_ffmpeg.c -- libavcodec/libavformat based probing code
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* (C) 2006-2010 Francesco Romani <fromani -at- gmail -dot- com>
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*
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* This file is part of transcode, a video stream processing tool.
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*
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* transcode is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* transcode 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "transcode.h"
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#include "tcinfo.h"
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#include "ioaux.h"
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#include "tc.h"
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#include "libtc/libtc.h"
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#include "libtc/ratiocodes.h"
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#ifdef HAVE_FFMPEG
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#include "libtc/tcavcodec.h"
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static void translate_info(const AVFormatContext *ctx, ProbeInfo *info)
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{
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AVStream *st = NULL;
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int i = 0, j = 0;
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if (ctx == NULL || info == NULL) {
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return;
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}
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/* first of all, video */
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for (i = 0; i < ctx->nb_streams; i++) {
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st = ctx->streams[i];
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if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
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info->bitrate = st->codec->bit_rate / 1000;
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info->width = st->codec->width;
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info->height = st->codec->height;
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if (st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0) {
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info->fps = av_q2d(st->r_frame_rate);
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} else {
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/* watch out here */
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info->fps = 1.0/av_q2d(st->codec->time_base);
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}
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tc_frc_code_from_value(&info->frc, info->fps);
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break;
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}
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}
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/* then audio track(s) */
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for (i = 0; i < ctx->nb_streams; i++) {
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st = ctx->streams[i];
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if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO
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&& j < TC_MAX_AUD_TRACKS) {
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info->track[j].format = 0x1; /* known wrong */
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info->track[j].chan = st->codec->channels;
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info->track[j].samplerate = st->codec->sample_rate;
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info->track[j].bitrate = st->codec->bit_rate / 1000;
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/* XXX: known wrong for PCM */
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info->track[j].bits = BITS;
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/*
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* XXX where libavcodec/libaformat provide this?
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* Should be inferred by CODEC_ID used?
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* */
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info->track[j].pts_start = 0; /* XXX: ?!? */
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j++;
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}
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}
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info->num_tracks = j;
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}
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void probe_ffmpeg(info_t *ipipe)
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{
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/* to be completed */
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AVFormatContext *lavf_dmx_context = NULL;
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int ret = 0;
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close(ipipe->fd_in);
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TC_INIT_LIBAVCODEC;
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ret = av_open_input_file(&lavf_dmx_context, ipipe->name,
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NULL, 0, NULL);
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if (ret != 0) {
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tc_log_error(__FILE__, "unable to open '%s'"
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" (libavformat failure)",
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ipipe->name);
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ipipe->error = 1;
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return;
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}
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ret = av_find_stream_info(lavf_dmx_context);
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if (ret < 0) {
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tc_log_error(__FILE__, "unable to fetch informations from '%s'"
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" (libavformat failure)",
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ipipe->name);
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ipipe->error = 1;
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return;
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}
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translate_info(lavf_dmx_context, ipipe->probe_info);
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av_close_input_file(lavf_dmx_context);
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return;
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}
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#else // HAVE_FFMPEG
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void probe_ffmpeg(info_t *ipipe)
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{
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tc_log_error(__FILE__, "no support for FFmpeg compiled - exit.");
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ipipe->error = 1;
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return;
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}
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#endif // HAVE_FFMPEG
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/*************************************************************************/
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/*
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* Local variables:
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* c-file-style: "stroustrup"
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* c-file-offsets: ((case-label . *) (statement-case-intro . *))
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* indent-tabs-mode: nil
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* End:
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*
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* vim: expandtab shiftwidth=4:
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*/
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