--- /dev/null
+/*****************************************************************************
+ * mux.c: muxer using ffmpeg (libavformat).
+ *****************************************************************************
+ * Copyright (C) 2006 VideoLAN
+ * $Id: demux.c 8444 2004-08-17 08:21:07Z gbazin $
+ *
+ * Authors: Gildas Bazin <gbazin@videolan.org>
+ *
+ * This program 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.
+ *
+ * This program 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <stdlib.h> /* malloc(), free() */
+
+#include <vlc/vlc.h>
+#include <vlc/input.h>
+#include <vlc/sout.h>
+
+/* ffmpeg header */
+#ifdef HAVE_FFMPEG_AVFORMAT_H
+# include <ffmpeg/avformat.h>
+#else
+# include <avformat.h>
+#endif
+
+#include "ffmpeg.h"
+
+//#define AVFORMAT_DEBUG 1
+
+/* Version checking */
+#if (LIBAVFORMAT_BUILD >= 4687) && (defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_TREE))
+
+/*****************************************************************************
+ * mux_sys_t: mux descriptor
+ *****************************************************************************/
+struct sout_mux_sys_t
+{
+ ByteIOContext io;
+ int io_buffer_size;
+ uint8_t *io_buffer;
+
+ AVFormatContext *oc;
+ URLContext url;
+ URLProtocol prot;
+
+ vlc_bool_t b_write_header;
+ vlc_bool_t b_error;
+};
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Control ( sout_mux_t *, int, va_list );
+static int AddStream( sout_mux_t *, sout_input_t * );
+static int DelStream( sout_mux_t *, sout_input_t * );
+static int Mux ( sout_mux_t * );
+
+static int IOWrite( void *opaque, uint8_t *buf, int buf_size );
+static offset_t IOSeek( void *opaque, offset_t offset, int whence );
+
+/*****************************************************************************
+ * Open
+ *****************************************************************************/
+int E_(OpenMux)( vlc_object_t *p_this )
+{
+ sout_mux_t *p_mux = (sout_mux_t*)p_this;
+ sout_mux_sys_t *p_sys;
+ AVFormatParameters params, *ap = ¶ms;
+
+ /* Should we call it only once ? */
+ av_register_all();
+
+ /* Find the requested muxer */
+ AVOutputFormat *file_oformat =
+ guess_format(NULL, p_mux->p_access->psz_name, NULL);
+ if (!file_oformat)
+ {
+ msg_Err( p_mux, "unable for find a suitable output format" );
+ return VLC_EGENERIC;
+ }
+
+ /* Fill p_mux fields */
+ p_mux->pf_control = Control;
+ p_mux->pf_addstream = AddStream;
+ p_mux->pf_delstream = DelStream;
+ p_mux->pf_mux = Mux;
+ p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
+
+ p_sys->oc = av_alloc_format_context();
+ p_sys->oc->oformat = file_oformat;
+
+ /* Create I/O wrapper */
+ p_sys->io_buffer_size = 32768; /* FIXME */
+ p_sys->io_buffer = malloc( p_sys->io_buffer_size );
+ p_sys->url.priv_data = p_mux;
+ p_sys->url.prot = &p_sys->prot;
+ p_sys->url.prot->name = "VLC I/O wrapper";
+ p_sys->url.prot->url_open = 0;
+ p_sys->url.prot->url_read = 0;
+ p_sys->url.prot->url_write =
+ (int (*) (URLContext *, unsigned char *, int))IOWrite;
+ p_sys->url.prot->url_seek =
+ (offset_t (*) (URLContext *, offset_t, int))IOSeek;
+ p_sys->url.prot->url_close = 0;
+ p_sys->url.prot->next = 0;
+ init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
+ 1, &p_sys->url, NULL, IOWrite, IOSeek );
+
+ memset( ap, 0, sizeof(*ap) );
+ if( av_set_parameters( p_sys->oc, ap ) < 0 )
+ {
+ msg_Err( p_mux, "invalid encoding parameters" );
+ av_free( p_sys->oc );
+ free( p_sys->io_buffer );
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ p_sys->oc->pb = p_sys->io;
+ p_sys->oc->nb_streams = 0;
+
+ p_sys->b_write_header = VLC_TRUE;
+ p_sys->b_error = VLC_FALSE;
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Close
+ *****************************************************************************/
+void E_(CloseMux)( vlc_object_t *p_this )
+{
+ sout_mux_t *p_mux = (sout_mux_t*)p_this;
+ sout_mux_sys_t *p_sys = p_mux->p_sys;
+ int i;
+
+ if( av_write_trailer( p_sys->oc ) < 0 )
+ {
+ msg_Err( p_mux, "could not write trailer" );
+ }
+
+ for( i = 0 ; i < p_sys->oc->nb_streams; i++ )
+ {
+ if( p_sys->oc->streams[i]->codec->extradata )
+ av_free( p_sys->oc->streams[i]->codec->extradata );
+ av_free( p_sys->oc->streams[i]->codec );
+ av_free( p_sys->oc->streams[i] );
+ }
+ av_free( p_sys->oc );
+
+ free( p_sys->io_buffer );
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * AddStream
+ *****************************************************************************/
+static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
+{
+ sout_mux_sys_t *p_sys = p_mux->p_sys;
+ AVCodecContext *codec;
+ AVStream *stream;
+ int i_codec_id, i_aspect_num, i_aspect_den;
+
+ msg_Dbg( p_mux, "adding input" );
+
+ if( !E_(GetFfmpegCodec)( p_input->p_fmt->i_codec, 0, &i_codec_id, 0 ) )
+ {
+ msg_Dbg( p_mux, "couldn't find codec for fourcc '%4.4s'",
+ (char *)&p_input->p_fmt->i_codec );
+ return VLC_EGENERIC;
+ }
+
+ p_input->p_sys = malloc( sizeof( int ) );
+ *((int *)p_input->p_sys) = p_sys->oc->nb_streams;
+
+ stream = av_new_stream( p_sys->oc, p_sys->oc->nb_streams);
+ if( !stream )
+ {
+ free( p_input->p_sys );
+ return VLC_EGENERIC;
+ }
+ codec = stream->codec;
+
+ switch( p_input->p_fmt->i_cat )
+ {
+ case AUDIO_ES:
+ codec->codec_type = CODEC_TYPE_AUDIO;
+ codec->channels = p_input->p_fmt->audio.i_channels;
+ codec->sample_rate = p_input->p_fmt->audio.i_rate;
+ codec->time_base = (AVRational){1, codec->sample_rate};
+ break;
+
+ case VIDEO_ES:
+ if( !p_input->p_fmt->video.i_frame_rate ||
+ !p_input->p_fmt->video.i_frame_rate_base )
+ {
+ msg_Warn( p_mux, "Missing frame rate, assuming 25fps" );
+ p_input->p_fmt->video.i_frame_rate = 25;
+ p_input->p_fmt->video.i_frame_rate_base = 1;
+ }
+ codec->codec_type = CODEC_TYPE_VIDEO;
+ codec->width = p_input->p_fmt->video.i_width;
+ codec->height = p_input->p_fmt->video.i_height;
+ av_reduce( &i_aspect_num, &i_aspect_den,
+ p_input->p_fmt->video.i_aspect,
+ VOUT_ASPECT_FACTOR, 1 << 30 /* something big */ );
+ av_reduce( &codec->sample_aspect_ratio.num,
+ &codec->sample_aspect_ratio.den,
+ i_aspect_num * (int64_t)codec->height,
+ i_aspect_den * (int64_t)codec->width, 1 << 30 );
+ codec->time_base.den = p_input->p_fmt->video.i_frame_rate;
+ codec->time_base.num = p_input->p_fmt->video.i_frame_rate_base;
+ break;
+ }
+
+ codec->bit_rate = p_input->p_fmt->i_bitrate;
+ codec->codec_tag = p_input->p_fmt->i_codec;
+ codec->codec_id = i_codec_id;
+
+ if( p_input->p_fmt->i_extra )
+ {
+ codec->extradata_size = p_input->p_fmt->i_extra;
+ codec->extradata = av_malloc( p_input->p_fmt->i_extra );
+ memcpy( codec->extradata, p_input->p_fmt->p_extra,
+ p_input->p_fmt->i_extra );
+ }
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * DelStream
+ *****************************************************************************/
+static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
+{
+ msg_Dbg( p_mux, "removing input" );
+ free( p_input->p_sys );
+ return VLC_SUCCESS;
+}
+
+/*
+ * TODO move this function to src/stream_output.c (used by nearly all muxers)
+ */
+static int MuxGetStream( sout_mux_t *p_mux, int *pi_stream, mtime_t *pi_dts )
+{
+ mtime_t i_dts;
+ int i_stream, i;
+
+ for( i = 0, i_dts = 0, i_stream = -1; i < p_mux->i_nb_inputs; i++ )
+ {
+ block_fifo_t *p_fifo;
+
+ p_fifo = p_mux->pp_inputs[i]->p_fifo;
+
+ /* We don't really need to have anything in the SPU fifo */
+ if( p_mux->pp_inputs[i]->p_fmt->i_cat == SPU_ES &&
+ p_fifo->i_depth == 0 ) continue;
+
+ if( p_fifo->i_depth )
+ {
+ block_t *p_buf;
+
+ p_buf = block_FifoShow( p_fifo );
+ if( i_stream < 0 || p_buf->i_dts < i_dts )
+ {
+ i_dts = p_buf->i_dts;
+ i_stream = i;
+ }
+ }
+ else return -1;
+
+ }
+ if( pi_stream ) *pi_stream = i_stream;
+ if( pi_dts ) *pi_dts = i_dts;
+ return i_stream;
+}
+
+static int MuxBlock( sout_mux_t *p_mux, sout_input_t *p_input )
+{
+ sout_mux_sys_t *p_sys = p_mux->p_sys;
+ block_t *p_data = block_FifoGet( p_input->p_fifo );
+ int i_stream = *((int *)p_input->p_sys);
+ AVPacket pkt = {0};
+
+ pkt.data = p_data->p_buffer;
+ pkt.size = p_data->i_buffer;
+ pkt.stream_index = i_stream;
+
+ if( p_data->i_flags & BLOCK_FLAG_TYPE_I ) pkt.flags |= PKT_FLAG_KEY;
+ if( p_data->i_pts > 0 )
+ pkt.pts = p_data->i_pts * p_sys->oc->streams[i_stream]->time_base.den /
+ I64C(1000000) / p_sys->oc->streams[i_stream]->time_base.num;
+ if( p_data->i_dts > 0 )
+ pkt.dts = p_data->i_dts * p_sys->oc->streams[i_stream]->time_base.den /
+ I64C(1000000) / p_sys->oc->streams[i_stream]->time_base.num;
+
+ if( av_write_frame( p_sys->oc, &pkt ) < 0 )
+ {
+ msg_Err( p_mux, "could not write frame (pts: "I64Fd", dts: "I64Fd") "
+ "(pkt pts: "I64Fd", dts: "I64Fd")",
+ p_data->i_pts, p_data->i_dts, pkt.pts, pkt.dts );
+ return VLC_EGENERIC;
+ }
+
+ block_Release( p_data );
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Mux: multiplex available data in input fifos
+ *****************************************************************************/
+static int Mux( sout_mux_t *p_mux )
+{
+ sout_mux_sys_t *p_sys = p_mux->p_sys;
+ int i_stream;
+
+ if( p_sys->b_error ) return VLC_EGENERIC;
+
+ if( p_sys->b_write_header )
+ {
+ msg_Dbg( p_mux, "writing header" );
+
+ p_sys->b_write_header = VLC_FALSE;
+
+ if( av_write_header( p_sys->oc ) < 0 )
+ {
+ msg_Err( p_mux, "could not write header" );
+ p_sys->b_error = VLC_TRUE;
+ return VLC_EGENERIC;
+ }
+ }
+
+ for( ;; )
+ {
+ if( MuxGetStream( p_mux, &i_stream, 0 ) < 0 ) return VLC_SUCCESS;
+ MuxBlock( p_mux, p_mux->pp_inputs[i_stream] );
+ }
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Control:
+ *****************************************************************************/
+static int Control( sout_mux_t *p_mux, int i_query, va_list args )
+{
+ vlc_bool_t *pb_bool;
+
+ switch( i_query )
+ {
+ case MUX_CAN_ADD_STREAM_WHILE_MUXING:
+ pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
+ *pb_bool = VLC_FALSE;
+ return VLC_SUCCESS;
+
+ case MUX_GET_ADD_STREAM_WAIT:
+ pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
+ *pb_bool = VLC_TRUE;
+ return VLC_SUCCESS;
+
+ case MUX_GET_MIME:
+ default:
+ return VLC_EGENERIC;
+ }
+}
+
+/*****************************************************************************
+ * I/O wrappers for libavformat
+ *****************************************************************************/
+static int IOWrite( void *opaque, uint8_t *buf, int buf_size )
+{
+ URLContext *p_url = opaque;
+ sout_mux_t *p_mux = p_url->priv_data;
+ int i_ret;
+
+#ifdef AVFORMAT_DEBUG
+ msg_Dbg( p_mux, "IOWrite %i bytes", buf_size );
+#endif
+
+ block_t *p_buf = block_New( p_mux->p_sout, buf_size );
+ if( buf_size > 0 ) memcpy( p_buf->p_buffer, buf, buf_size );
+
+ i_ret = sout_AccessOutWrite( p_mux->p_access, p_buf );
+ return i_ret ? i_ret : -1;
+}
+
+static offset_t IOSeek( void *opaque, offset_t offset, int whence )
+{
+ URLContext *p_url = opaque;
+ sout_mux_t *p_mux = p_url->priv_data;
+ int64_t i_absolute;
+
+#ifdef AVFORMAT_DEBUG
+ msg_Dbg( p_mux, "IOSeek offset: "I64Fd", whence: %i", offset, whence );
+#endif
+
+ switch( whence )
+ {
+ case SEEK_SET:
+ i_absolute = offset;
+ break;
+ case SEEK_CUR:
+ case SEEK_END:
+ default:
+ return -1;
+ }
+
+ if( sout_AccessOutSeek( p_mux->p_access, i_absolute ) )
+ {
+ return -1;
+ }
+
+ return 0;
+}
+
+#else /* LIBAVFORMAT_BUILD >= 4687 */
+
+int E_(OpenMux)( vlc_object_t *p_this )
+{
+ return VLC_EGENERIC;
+}
+
+void E_(CloseMux)( vlc_object_t *p_this )
+{
+}
+
+#endif /* LIBAVFORMAT_BUILD >= 4687 */
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