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Add MPEG audio layer I, II, III decoder based on mpg123

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This commit is contained in:
Ludovic Fauvet 2014-12-02 13:37:54 +01:00
parent 575a20f3c2
commit 61f7f3dc63
6 changed files with 333 additions and 0 deletions
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1
NEWS
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@ -20,6 +20,7 @@ Decoder:
* Important improvements for the MMAL decoder and output for rPI
* Support HEVC hardware decoding using OMX and MediaCodec
* Support VP9 and WMV3 decoding using OMX and performance improvements
* New MPEG-1 & 2 audio layer I, II, III + MPEG 2.5 decoder based on libmpg123
Demuxers:
* Support HD-DVD .evo (H.264, VC-1, MPEG-2, PCM, AC-3, E-AC3, MLP, DTS)

5
configure.ac
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@ -2234,6 +2234,11 @@ AC_SUBST(MAD_CFLAGS)
AC_SUBST(MAD_LIBS)
AM_CONDITIONAL([HAVE_MAD], [test "${have_mad}" = "yes"])
dnl mpg123 plugin
dnl
dnl
PKG_ENABLE_MODULES_VLC([MPG123], [mpg123], [libmpg123], [libmpg123 decoder support], [auto])
AC_ARG_ENABLE(merge-ffmpeg,
[ --enable-merge-ffmpeg merge FFmpeg-based plugins (default disabled)],, [

1
modules/MODULES_LIST
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@ -226,6 +226,7 @@ $Id$
* mp4: MP4 file input module
* mpc: Musepack decoder
* mpeg_audio: MPEG audio parser/packetizer
* mpg123: MPEG-1 & 2 audio layer I, II, III + MPEG 2.5 decoder using mpg123
* mpgv: MPEG-I/II Video demuxer
* mtp: MTP interface module
* mux_asf: ASF muxer

7
modules/codec/Makefile.am
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@ -60,6 +60,13 @@ if HAVE_MAD
libmpeg_audio_plugin_la_CPPFLAGS += -DHAVE_MPGA_FILTER
endif
libmpg123_plugin_la_SOURCES = codec/mpg123.c
libmpg123_plugin_la_CFLAGS = $(AM_CFLAGS) $(MPG123_CFLAGS)
libmpg123_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(codecdir)'
libmpg123_plugin_la_LIBADD = $(MPG123_LIBS)
EXTRA_LTLIBRARIES += libmpg123_plugin.la
codec_LTLIBRARIES += $(LTLIBmpg123)
libuleaddvaudio_plugin_la_SOURCES = codec/uleaddvaudio.c
codec_LTLIBRARIES += libuleaddvaudio_plugin.la

318
modules/codec/mpg123.c Normal file
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@ -0,0 +1,318 @@
/*****************************************************************************
* mpg123.c: MPEG-1 & 2 audio layer I, II, III + MPEG 2.5 decoder
*****************************************************************************
* Copyright (C) 2001-2014 VLC authors and VideoLAN
*
* Authors: Ludovic Fauvet <etix@videolan.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <mpg123.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_aout.h>
#include <vlc_block.h>
#include <vlc_codec.h>
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int OpenDecoder( vlc_object_t * );
static void CloseDecoder( vlc_object_t * );
static block_t *DecodeBlock( decoder_t *, block_t ** );
static int InitMPG123( void );
static void ExitMPG123( void );
static unsigned int mpg123_refcount = 0;
static vlc_mutex_t mpg123_mutex = VLC_STATIC_MUTEX;
/*****************************************************************************
* Local structures
*****************************************************************************/
struct decoder_sys_t
{
mpg123_handle * p_handle;
date_t end_date;
struct mpg123_frameinfo frame_info;
};
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin ()
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_ACODEC )
set_description( N_("MPEG audio decoder using mpg123") )
set_capability( "decoder", 99 )
set_shortname( "mpg123" )
set_callbacks( OpenDecoder, CloseDecoder )
vlc_module_end ()
/****************************************************************************
* DecodeBlock: the whole thing
****************************************************************************/
static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
int i_err;
block_t *p_block = pp_block ? *pp_block : NULL;
decoder_sys_t *p_sys = p_dec->p_sys;
if( !pp_block || !p_block )
return NULL;
if( p_block->i_buffer == 0 )
return NULL;
if( !date_Get( &p_sys->end_date ) && p_block->i_pts <= VLC_TS_INVALID )
{
/* We've just started the stream, wait for the first PTS. */
msg_Dbg( p_dec, "waiting for PTS" );
block_Release( p_block );
return NULL;
}
if( p_block->i_flags & ( BLOCK_FLAG_DISCONTINUITY | BLOCK_FLAG_CORRUPTED ) )
{
date_Set( &p_sys->end_date, 0 );
block_Release( p_block );
return NULL;
}
/* Feed mpg123 with raw data */
i_err = mpg123_feed( p_sys->p_handle, p_block->p_buffer,
p_block->i_buffer );
if( i_err != MPG123_OK )
{
msg_Err( p_dec, "mpg123_feed failed: %s", mpg123_plain_strerror( i_err ) );
block_Release( p_block );
return NULL;
}
/* Get details about the stream */
i_err = mpg123_info( p_sys->p_handle, &p_sys->frame_info );
if( i_err == MPG123_NEED_MORE )
{
/* Need moar data */
return NULL;
}
else if( i_err != MPG123_OK )
{
msg_Err( p_dec, "mpg123_info failed: %s", mpg123_plain_strerror( i_err ) );
block_Release( p_block );
return NULL;
}
/* Configure the output */
p_block->i_nb_samples = mpg123_spf( p_sys->p_handle );
p_dec->fmt_out.i_bitrate = p_sys->frame_info.bitrate * 1000;
switch( p_sys->frame_info.mode )
{
case MPG123_M_STEREO:
case MPG123_M_JOINT:
p_dec->fmt_out.audio.i_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
break;
case MPG123_M_DUAL:
p_dec->fmt_out.audio.i_original_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_DUALMONO;
break;
case MPG123_M_MONO:
p_dec->fmt_out.audio.i_original_channels = AOUT_CHAN_CENTER;
break;
default:
msg_Err( p_dec, "Unknown mode");
block_Release( p_block );
return NULL;
}
p_dec->fmt_out.audio.i_physical_channels =
p_dec->fmt_out.audio.i_original_channels & AOUT_CHAN_PHYSMASK;
/* Date management */
if( p_dec->fmt_out.audio.i_rate != p_sys->frame_info.rate )
{
p_dec->fmt_out.audio.i_rate = p_sys->frame_info.rate;
date_Init( &p_sys->end_date, p_dec->fmt_out.audio.i_rate, 1 );
date_Set( &p_sys->end_date, 0 );
}
if( p_block->i_pts > VLC_TS_INVALID &&
p_block->i_pts != date_Get( &p_sys->end_date ) )
{
date_Set( &p_sys->end_date, p_block->i_pts );
}
/* Request a new audio buffer */
block_t *p_out = decoder_NewAudioBuffer( p_dec, p_block->i_nb_samples );
if( unlikely( !p_out ) )
return NULL;
/* Configure the buffer */
p_out->i_nb_samples = p_block->i_nb_samples;
p_out->i_dts = p_out->i_pts = date_Get( &p_sys->end_date );
p_out->i_length = date_Increment( &p_sys->end_date, p_block->i_nb_samples )
- p_out->i_pts;
/* Make mpg123 write directly into the VLC output buffer */
i_err = mpg123_replace_buffer( p_sys->p_handle, p_out->p_buffer, p_out->i_buffer );
if( i_err != MPG123_OK )
{
msg_Err( p_dec, "could not replace buffer: %s", mpg123_plain_strerror( i_err ) );
block_Release( p_out );
return NULL;
}
*pp_block = NULL; /* avoid being fed the same packet again */
/* Do the actual decoding now */
i_err = mpg123_decode_frame( p_sys->p_handle, NULL, NULL, NULL );
if( i_err != MPG123_OK )
{
if( i_err != MPG123_NEW_FORMAT )
msg_Err( p_dec, "mpg123_decode_frame error: %s", mpg123_plain_strerror( i_err ) );
block_Release( p_out );
p_out = NULL;
}
block_Release( p_block );
return p_out;
}
/*****************************************************************************
* OpenDecoder :
*****************************************************************************/
static int OpenDecoder( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys;
if( p_dec->fmt_in.i_codec != VLC_CODEC_MPGA &&
p_dec->fmt_in.i_codec != VLC_CODEC_MP3 )
return VLC_EGENERIC;
p_dec->fmt_out.i_cat = AUDIO_ES;
p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
/* Initialize libmpg123 */
if( InitMPG123() != MPG123_OK )
return VLC_EGENERIC;
/* Allocate the memory needed to store the module's structure */
p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
if( p_sys == NULL )
return VLC_EGENERIC;
/* Create our mpg123 handle */
if( ( p_sys->p_handle = mpg123_new( NULL, NULL ) ) == NULL )
goto error;
/* Open a new bitstream */
if( mpg123_open_feed( p_sys->p_handle ) != MPG123_OK )
{
msg_Err( p_this, "mpg123 error: can't open feed" );
goto error;
}
/* Disable resync stream after error */
mpg123_param( p_sys->p_handle, MPG123_ADD_FLAGS, MPG123_NO_RESYNC, 0 );
/* Setup output format */
mpg123_format_none( p_sys->p_handle );
if( MPG123_OK != mpg123_format( p_sys->p_handle,
p_dec->fmt_in.audio.i_rate,
MPG123_MONO | MPG123_STEREO,
MPG123_ENC_FLOAT_32 ) )
{
msg_Err( p_this, "mpg123 error: %s",
mpg123_strerror( p_sys->p_handle ) );
mpg123_close( p_sys->p_handle );
goto error;
}
p_dec->fmt_out.audio.i_rate = 0; /* So end_date gets initialized */
p_dec->fmt_out.audio.i_format = p_dec->fmt_out.i_codec;
p_dec->pf_decode_audio = DecodeBlock;
msg_Dbg( p_this, "%4.4s->%4.4s, bits per sample: %i",
(char *)&p_dec->fmt_in.i_codec,
(char *)&p_dec->fmt_out.i_codec,
aout_BitsPerSample( p_dec->fmt_out.i_codec ) );
return VLC_SUCCESS;
error:
mpg123_delete( p_sys->p_handle );
ExitMPG123();
free( p_sys );
return VLC_EGENERIC;
}
/*****************************************************************************
* CloseDecoder : deallocate data structures
*****************************************************************************/
static void CloseDecoder( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
mpg123_close( p_sys->p_handle );
mpg123_delete( p_sys->p_handle );
ExitMPG123();
free( p_sys );
}
/*****************************************************************************
* InitMPG123 : initialize the mpg123 library (reentrant)
*****************************************************************************/
static int InitMPG123( void )
{
int i_ret;
vlc_mutex_lock( &mpg123_mutex );
if( mpg123_refcount > 0 )
{
mpg123_refcount++;
vlc_mutex_unlock( &mpg123_mutex );
return MPG123_OK;
}
if( ( i_ret = mpg123_init() ) == MPG123_OK )
mpg123_refcount++;
vlc_mutex_unlock( &mpg123_mutex );
return i_ret;
}
/*****************************************************************************
* ExitMPG123 : close down the mpg123 library (reentrant)
*****************************************************************************/
static void ExitMPG123( void )
{
vlc_mutex_lock( &mpg123_mutex );
mpg123_refcount--;
if( mpg123_refcount == 0 )
mpg123_exit();
vlc_mutex_unlock( &mpg123_mutex );
}

1
po/POTFILES.in
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@ -383,6 +383,7 @@ modules/codec/libmpeg2.c
modules/codec/lpcm.c
modules/codec/mft.c
modules/codec/mpeg_audio.c
modules/codec/mpg123.c
modules/codec/omxil/android_mediacodec.c
modules/codec/omxil/omxil.c
modules/codec/omxil/omxil.h