/***************************************************************************** * vorbis.c: vorbis decoder/encoder/packetizer module using of libvorbis. ***************************************************************************** * Copyright (C) 2001-2012 VLC authors and VideoLAN * Copyright (C) 2007 Société des arts technologiques * Copyright (C) 2007 Savoir-faire Linux * * $Id$ * * Authors: Gildas Bazin * * 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 #include #include #include #include #include #include #include "../demux/xiph.h" #include #ifdef MODULE_NAME_IS_tremor # include # define INTERLEAVE_TYPE int32_t #else # include # define INTERLEAVE_TYPE float # ifdef ENABLE_SOUT # define HAVE_VORBIS_ENCODER # include # ifndef OV_ECTL_RATEMANAGE_AVG # define OV_ECTL_RATEMANAGE_AVG 0x0 # endif # endif #endif /***************************************************************************** * decoder_sys_t : vorbis decoder descriptor *****************************************************************************/ struct decoder_sys_t { /* Module mode */ bool b_packetizer; bool b_has_headers; /* * Vorbis properties */ vorbis_info vi; /* struct that stores all the static vorbis bitstream settings */ vorbis_comment vc; /* struct that stores all the bitstream user * comments */ vorbis_dsp_state vd; /* central working state for the packet->PCM * decoder */ vorbis_block vb; /* local working space for packet->PCM decode */ /* * Common properties */ date_t end_date; int i_last_block_size; /* ** Channel reordering */ uint8_t pi_chan_table[AOUT_CHAN_MAX]; }; static const int pi_channels_maps[9] = { 0, AOUT_CHAN_CENTER, AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT, AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT, AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT, AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT, AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE, AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE, AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE, }; /* ** channel order as defined in http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-800004.3.9 */ /* recommended vorbis channel order for 8 channels */ static const uint32_t pi_8channels_in[] = { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT, AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,AOUT_CHAN_LFE, 0 }; /* recommended vorbis channel order for 7 channels */ static const uint32_t pi_7channels_in[] = { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT, AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, AOUT_CHAN_REARCENTER, AOUT_CHAN_LFE, 0 }; /* recommended vorbis channel order for 6 channels */ static const uint32_t pi_6channels_in[] = { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_LFE, 0 }; /* recommended vorbis channel order for 4 channels */ static const uint32_t pi_4channels_in[] = { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, 0 }; /* recommended vorbis channel order for 3 channels */ static const uint32_t pi_3channels_in[] = { AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT, 0 }; /**************************************************************************** * Local prototypes ****************************************************************************/ static int OpenDecoder ( vlc_object_t * ); static int OpenPacketizer( vlc_object_t * ); static void CloseDecoder ( vlc_object_t * ); static int DecodeAudio ( decoder_t *, block_t * ); static block_t *Packetize ( decoder_t *, block_t ** ); static void Flush( decoder_t * ); static int ProcessHeaders( decoder_t * ); static block_t *ProcessPacket ( decoder_t *, ogg_packet *, block_t ** ); static block_t *DecodePacket( decoder_t *, ogg_packet * ); static block_t *SendPacket( decoder_t *, ogg_packet *, block_t * ); static void ParseVorbisComments( decoder_t * ); static void ConfigureChannelOrder(uint8_t *, int, uint32_t ); #ifdef HAVE_VORBIS_ENCODER static int OpenEncoder ( vlc_object_t * ); static void CloseEncoder ( vlc_object_t * ); static block_t *Encode ( encoder_t *, block_t * ); #endif /***************************************************************************** * Module descriptor *****************************************************************************/ #define ENC_QUALITY_TEXT N_("Encoding quality") #define ENC_QUALITY_LONGTEXT N_( \ "Enforce a quality between 1 (low) and 10 (high), instead " \ "of specifying a particular bitrate. This will produce a VBR stream." ) #define ENC_MAXBR_TEXT N_("Maximum encoding bitrate") #define ENC_MAXBR_LONGTEXT N_( \ "Maximum bitrate in kbps. This is useful for streaming applications." ) #define ENC_MINBR_TEXT N_("Minimum encoding bitrate") #define ENC_MINBR_LONGTEXT N_( \ "Minimum bitrate in kbps. This is useful for encoding for a fixed-size channel." ) #define ENC_CBR_TEXT N_("CBR encoding") #define ENC_CBR_LONGTEXT N_( \ "Force a constant bitrate encoding (CBR)." ) vlc_module_begin () set_shortname( "Vorbis" ) set_description( N_("Vorbis audio decoder") ) #ifdef MODULE_NAME_IS_tremor set_capability( "audio decoder", 90 ) #else set_capability( "audio decoder", 100 ) #endif set_category( CAT_INPUT ) set_subcategory( SUBCAT_INPUT_ACODEC ) set_callbacks( OpenDecoder, CloseDecoder ) add_submodule () set_description( N_("Vorbis audio packetizer") ) set_capability( "packetizer", 100 ) set_callbacks( OpenPacketizer, CloseDecoder ) #ifdef HAVE_VORBIS_ENCODER # define ENC_CFG_PREFIX "sout-vorbis-" add_submodule () set_description( N_("Vorbis audio encoder") ) set_capability( "encoder", 130 ) set_callbacks( OpenEncoder, CloseEncoder ) add_integer( ENC_CFG_PREFIX "quality", 0, ENC_QUALITY_TEXT, ENC_QUALITY_LONGTEXT, false ) change_integer_range( 0, 10 ) add_integer( ENC_CFG_PREFIX "max-bitrate", 0, ENC_MAXBR_TEXT, ENC_MAXBR_LONGTEXT, false ) add_integer( ENC_CFG_PREFIX "min-bitrate", 0, ENC_MINBR_TEXT, ENC_MINBR_LONGTEXT, false ) add_bool( ENC_CFG_PREFIX "cbr", false, ENC_CBR_TEXT, ENC_CBR_LONGTEXT, false ) #endif vlc_module_end () #ifdef HAVE_VORBIS_ENCODER static const char *const ppsz_enc_options[] = { "quality", "max-bitrate", "min-bitrate", "cbr", NULL }; #endif /***************************************************************************** * OpenDecoder: probe the decoder and return score *****************************************************************************/ 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_cat != AUDIO_ES ) return VLC_EGENERIC; if( p_dec->fmt_in.i_codec != VLC_CODEC_VORBIS ) return VLC_EGENERIC; /* Allocate the memory needed to store the decoder's structure */ p_dec->p_sys = p_sys = malloc( sizeof(*p_sys) ); if( unlikely( !p_sys ) ) return VLC_ENOMEM; /* Misc init */ date_Set( &p_sys->end_date, 0 ); p_sys->i_last_block_size = 0; p_sys->b_packetizer = false; p_sys->b_has_headers = false; /* Take care of vorbis init */ vorbis_info_init( &p_sys->vi ); vorbis_comment_init( &p_sys->vc ); /* Set output properties */ #ifdef MODULE_NAME_IS_tremor p_dec->fmt_out.i_codec = VLC_CODEC_S32N; #else p_dec->fmt_out.i_codec = VLC_CODEC_FL32; #endif /* Set callbacks */ p_dec->pf_decode = DecodeAudio; p_dec->pf_packetize = Packetize; p_dec->pf_flush = Flush; return VLC_SUCCESS; } static int OpenPacketizer( vlc_object_t *p_this ) { decoder_t *p_dec = (decoder_t*)p_this; int i_ret = OpenDecoder( p_this ); if( i_ret == VLC_SUCCESS ) { p_dec->p_sys->b_packetizer = true; p_dec->fmt_out.i_codec = VLC_CODEC_VORBIS; } return i_ret; } /**************************************************************************** * DecodeBlock: the whole thing **************************************************************************** * This function must be fed with ogg packets. ****************************************************************************/ static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block ) { decoder_sys_t *p_sys = p_dec->p_sys; ogg_packet oggpacket; if( *pp_block ) { /* Block to Ogg packet */ oggpacket.packet = (*pp_block)->p_buffer; oggpacket.bytes = (*pp_block)->i_buffer; } else { if( p_sys->b_packetizer ) return NULL; /* Block to Ogg packet */ oggpacket.packet = NULL; oggpacket.bytes = 0; } oggpacket.granulepos = -1; oggpacket.b_o_s = 0; oggpacket.e_o_s = 0; oggpacket.packetno = 0; /* Check for headers */ if( !p_sys->b_has_headers ) { if( ProcessHeaders( p_dec ) ) { if( *pp_block ) block_Release( *pp_block ); return NULL; } p_sys->b_has_headers = true; } return ProcessPacket( p_dec, &oggpacket, pp_block ); } static int DecodeAudio( decoder_t *p_dec, block_t *p_block ) { if( p_block == NULL ) /* No Drain */ return VLCDEC_SUCCESS; block_t **pp_block = &p_block, *p_out; while( ( p_out = DecodeBlock( p_dec, pp_block ) ) != NULL ) decoder_QueueAudio( p_dec, p_out ); return VLCDEC_SUCCESS; } static block_t *Packetize( decoder_t *p_dec, block_t **pp_block ) { if( pp_block == NULL ) /* No Drain */ return NULL; return DecodeBlock( p_dec, pp_block ); } /***************************************************************************** * ProcessHeaders: process Vorbis headers. *****************************************************************************/ static int ProcessHeaders( decoder_t *p_dec ) { decoder_sys_t *p_sys = p_dec->p_sys; ogg_packet oggpacket; unsigned pi_size[XIPH_MAX_HEADER_COUNT]; const void *pp_data[XIPH_MAX_HEADER_COUNT]; unsigned i_count; if( xiph_SplitHeaders( pi_size, pp_data, &i_count, p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra) ) return VLC_EGENERIC; if( i_count < 3 ) return VLC_EGENERIC; oggpacket.granulepos = -1; oggpacket.e_o_s = 0; oggpacket.packetno = 0; /* Take care of the initial Vorbis header */ oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */ oggpacket.bytes = pi_size[0]; oggpacket.packet = (void *)pp_data[0]; if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 ) { msg_Err( p_dec, "this bitstream does not contain Vorbis audio data"); return VLC_EGENERIC; } /* Setup the format */ p_dec->fmt_out.audio.i_rate = p_sys->vi.rate; p_dec->fmt_out.audio.i_channels = p_sys->vi.channels; if( p_dec->fmt_out.audio.i_channels >= ARRAY_SIZE(pi_channels_maps) ) { msg_Err( p_dec, "invalid number of channels (1-%zu): %i", ARRAY_SIZE(pi_channels_maps), p_dec->fmt_out.audio.i_channels ); return VLC_EGENERIC; } p_dec->fmt_out.audio.i_physical_channels = pi_channels_maps[p_sys->vi.channels]; p_dec->fmt_out.i_bitrate = __MAX( 0, (int32_t) p_sys->vi.bitrate_nominal ); date_Init( &p_sys->end_date, p_sys->vi.rate, 1 ); msg_Dbg( p_dec, "channels:%d samplerate:%ld bitrate:%ud", p_sys->vi.channels, p_sys->vi.rate, p_dec->fmt_out.i_bitrate ); /* The next packet in order is the comments header */ oggpacket.b_o_s = 0; oggpacket.bytes = pi_size[1]; oggpacket.packet = (void *)pp_data[1]; if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 ) { msg_Err( p_dec, "2nd Vorbis header is corrupted" ); return VLC_EGENERIC; } ParseVorbisComments( p_dec ); /* The next packet in order is the codebooks header * We need to watch out that this packet is not missing as a * missing or corrupted header is fatal. */ oggpacket.b_o_s = 0; oggpacket.bytes = pi_size[2]; oggpacket.packet = (void *)pp_data[2]; if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 ) { msg_Err( p_dec, "3rd Vorbis header is corrupted" ); return VLC_EGENERIC; } if( !p_sys->b_packetizer ) { /* Initialize the Vorbis packet->PCM decoder */ vorbis_synthesis_init( &p_sys->vd, &p_sys->vi ); vorbis_block_init( &p_sys->vd, &p_sys->vb ); } else { void* p_extra = realloc( p_dec->fmt_out.p_extra, p_dec->fmt_in.i_extra ); if( unlikely( p_extra == NULL ) ) { return VLC_ENOMEM; } p_dec->fmt_out.p_extra = p_extra; p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra; memcpy( p_dec->fmt_out.p_extra, p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra ); } ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels, p_dec->fmt_out.audio.i_physical_channels); return VLC_SUCCESS; } /***************************************************************************** * Flush: *****************************************************************************/ static void Flush( decoder_t *p_dec ) { decoder_sys_t *p_sys = p_dec->p_sys; date_Set( &p_sys->end_date, 0 ); } /***************************************************************************** * ProcessPacket: processes a Vorbis packet. *****************************************************************************/ static block_t *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket, block_t **pp_block ) { decoder_sys_t *p_sys = p_dec->p_sys; block_t *p_block = *pp_block; *pp_block = NULL; /* To avoid being fed the same packet again */ if( !p_block ) return NULL; if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) ) { Flush( p_dec ); if( p_block->i_flags & BLOCK_FLAG_CORRUPTED ) { block_Release(p_block); return NULL; } } /* Date management */ if( p_block->i_pts > VLC_TICK_INVALID && p_block->i_pts != date_Get( &p_sys->end_date ) ) { date_Set( &p_sys->end_date, p_block->i_pts ); } if( !date_Get( &p_sys->end_date ) ) { /* We've just started the stream, wait for the first PTS. */ if( p_block ) block_Release( p_block ); return NULL; } if( p_sys->b_packetizer ) { return SendPacket( p_dec, p_oggpacket, p_block ); } else { block_t *p_aout_buffer = DecodePacket( p_dec, p_oggpacket ); if( p_block ) block_Release( p_block ); return p_aout_buffer; } } /***************************************************************************** * Interleave: helper function to interleave channels *****************************************************************************/ static void Interleave( INTERLEAVE_TYPE *p_out, const INTERLEAVE_TYPE **pp_in, int i_nb_channels, int i_samples, uint8_t *pi_chan_table) { for( int j = 0; j < i_samples; j++ ) for( int i = 0; i < i_nb_channels; i++ ) { #ifdef MODULE_NAME_IS_tremor union { int32_t i; uint32_t u;} spl; spl.u = ((uint32_t)pp_in[i][j]) << 8; p_out[j * i_nb_channels + pi_chan_table[i]] = spl.i; #else p_out[j * i_nb_channels + pi_chan_table[i]] = pp_in[i][j]; #endif } } /***************************************************************************** * DecodePacket: decodes a Vorbis packet. *****************************************************************************/ static block_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket ) { decoder_sys_t *p_sys = p_dec->p_sys; int i_samples; INTERLEAVE_TYPE **pp_pcm; if( p_oggpacket->bytes && vorbis_synthesis( &p_sys->vb, p_oggpacket ) == 0 ) vorbis_synthesis_blockin( &p_sys->vd, &p_sys->vb ); /* **pp_pcm is a multichannel float vector. In stereo, for * example, pp_pcm[0] is left, and pp_pcm[1] is right. i_samples is * the size of each channel. Convert the float values * (-1.<=range<=1.) to whatever PCM format and write it out */ if( ( i_samples = vorbis_synthesis_pcmout( &p_sys->vd, &pp_pcm ) ) > 0 ) { block_t *p_aout_buffer; if( decoder_UpdateAudioFormat( p_dec ) ) return NULL; p_aout_buffer = decoder_NewAudioBuffer( p_dec, i_samples ); if( p_aout_buffer == NULL ) return NULL; /* Interleave the samples */ Interleave( (INTERLEAVE_TYPE*)p_aout_buffer->p_buffer, (const INTERLEAVE_TYPE**)pp_pcm, p_sys->vi.channels, i_samples, p_sys->pi_chan_table); /* Tell libvorbis how many samples we actually consumed */ vorbis_synthesis_read( &p_sys->vd, i_samples ); /* Date management */ p_aout_buffer->i_pts = date_Get( &p_sys->end_date ); p_aout_buffer->i_length = date_Increment( &p_sys->end_date, i_samples ) - p_aout_buffer->i_pts; return p_aout_buffer; } else { return NULL; } } /***************************************************************************** * SendPacket: send an ogg dated packet to the stream output. *****************************************************************************/ static block_t *SendPacket( decoder_t *p_dec, ogg_packet *p_oggpacket, block_t *p_block ) { decoder_sys_t *p_sys = p_dec->p_sys; int i_block_size, i_samples; i_block_size = vorbis_packet_blocksize( &p_sys->vi, p_oggpacket ); if( i_block_size < 0 ) i_block_size = 0; /* non audio packet */ i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2; p_sys->i_last_block_size = i_block_size; /* Date management */ p_block->i_dts = p_block->i_pts = date_Get( &p_sys->end_date ); p_block->i_length = date_Increment( &p_sys->end_date, i_samples ) - p_block->i_pts; return p_block; } /***************************************************************************** * ParseVorbisComments *****************************************************************************/ static void ParseVorbisComments( decoder_t *p_dec ) { char *psz_name, *psz_value, *psz_comment; int i = 0; while( i < p_dec->p_sys->vc.comments ) { psz_comment = strdup( p_dec->p_sys->vc.user_comments[i] ); if( !psz_comment ) break; psz_name = psz_comment; psz_value = strchr( psz_comment, '=' ); /* Don't add empty values */ if( psz_value && psz_value[1] != '\0') { *psz_value = '\0'; psz_value++; if( !strcasecmp( psz_name, "REPLAYGAIN_TRACK_GAIN" ) || !strcasecmp( psz_name, "RG_RADIO" ) ) { audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain; r->pb_gain[AUDIO_REPLAY_GAIN_TRACK] = true; r->pf_gain[AUDIO_REPLAY_GAIN_TRACK] = us_atof( psz_value ); } else if( !strcasecmp( psz_name, "REPLAYGAIN_TRACK_PEAK" ) || !strcasecmp( psz_name, "RG_PEAK" ) ) { audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain; r->pb_peak[AUDIO_REPLAY_GAIN_TRACK] = true; r->pf_peak[AUDIO_REPLAY_GAIN_TRACK] = us_atof( psz_value ); } else if( !strcasecmp( psz_name, "REPLAYGAIN_ALBUM_GAIN" ) || !strcasecmp( psz_name, "RG_AUDIOPHILE" ) ) { audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain; r->pb_gain[AUDIO_REPLAY_GAIN_ALBUM] = true; r->pf_gain[AUDIO_REPLAY_GAIN_ALBUM] = us_atof( psz_value ); } else if( !strcasecmp( psz_name, "REPLAYGAIN_ALBUM_PEAK" ) ) { audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain; r->pb_peak[AUDIO_REPLAY_GAIN_ALBUM] = true; r->pf_peak[AUDIO_REPLAY_GAIN_ALBUM] = us_atof( psz_value ); } else if( !strcasecmp( psz_name, "METADATA_BLOCK_PICTURE" ) ) { /* Do nothing, for now */ } else { if( !p_dec->p_description ) p_dec->p_description = vlc_meta_New(); if( p_dec->p_description ) vlc_meta_AddExtra( p_dec->p_description, psz_name, psz_value ); } } free( psz_comment ); i++; } } /***************************************************************************** * *****************************************************************************/ static void ConfigureChannelOrder(uint8_t *pi_chan_table, int i_channels, uint32_t i_channel_mask) { const uint32_t *pi_channels_in; switch( i_channels ) { case 8: pi_channels_in = pi_8channels_in; break; case 7: pi_channels_in = pi_7channels_in; break; case 6: case 5: pi_channels_in = pi_6channels_in; break; case 4: pi_channels_in = pi_4channels_in; break; case 3: pi_channels_in = pi_3channels_in; break; default: for( int i = 0; i< i_channels; ++i ) pi_chan_table[i] = i; return; } aout_CheckChannelReorder( pi_channels_in, NULL, i_channel_mask, pi_chan_table ); } /***************************************************************************** * CloseDecoder: vorbis decoder destruction *****************************************************************************/ 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; if( !p_sys->b_packetizer && p_sys->b_has_headers ) { vorbis_block_clear( &p_sys->vb ); vorbis_dsp_clear( &p_sys->vd ); } vorbis_comment_clear( &p_sys->vc ); vorbis_info_clear( &p_sys->vi ); /* must be called last */ free( p_sys ); } #ifdef HAVE_VORBIS_ENCODER /***************************************************************************** * encoder_sys_t : vorbis encoder descriptor *****************************************************************************/ struct encoder_sys_t { /* * Vorbis properties */ vorbis_info vi; /* struct that stores all the static vorbis bitstream settings */ vorbis_comment vc; /* struct that stores all the bitstream user * comments */ vorbis_dsp_state vd; /* central working state for the packet->PCM * decoder */ vorbis_block vb; /* local working space for packet->PCM decode */ int i_last_block_size; int i_samples_delay; /* ** Channel reordering */ uint8_t pi_chan_table[AOUT_CHAN_MAX]; }; /***************************************************************************** * OpenEncoder: probe the encoder and return score *****************************************************************************/ static int OpenEncoder( vlc_object_t *p_this ) { encoder_t *p_enc = (encoder_t *)p_this; encoder_sys_t *p_sys; int i_quality, i_min_bitrate, i_max_bitrate; ogg_packet header[3]; if( p_enc->fmt_out.i_codec != VLC_CODEC_VORBIS && !p_enc->obj.force ) { return VLC_EGENERIC; } /* Allocate the memory needed to store the decoder's structure */ if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL ) return VLC_ENOMEM; p_enc->p_sys = p_sys; p_enc->pf_encode_audio = Encode; p_enc->fmt_in.i_codec = VLC_CODEC_FL32; p_enc->fmt_out.i_codec = VLC_CODEC_VORBIS; if( p_enc->fmt_in.audio.i_channels >= ARRAY_SIZE(pi_channels_maps) ) { p_enc->fmt_in.audio.i_channels = ARRAY_SIZE(pi_channels_maps) - 1; msg_Warn( p_enc, "lowering channel count to %u", p_enc->fmt_in.audio.i_channels ); } config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg ); i_quality = var_GetInteger( p_enc, ENC_CFG_PREFIX "quality" ); if( i_quality > 10 ) i_quality = 10; if( i_quality < 0 ) i_quality = 0; if( var_GetBool( p_enc, ENC_CFG_PREFIX "cbr" ) ) i_quality = 0; i_max_bitrate = var_GetInteger( p_enc, ENC_CFG_PREFIX "max-bitrate" ); i_min_bitrate = var_GetInteger( p_enc, ENC_CFG_PREFIX "min-bitrate" ); /* Initialize vorbis encoder */ vorbis_info_init( &p_sys->vi ); if( i_quality > 0 ) { /* VBR mode */ if( vorbis_encode_setup_vbr( &p_sys->vi, p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate, i_quality * 0.1 ) ) { vorbis_info_clear( &p_sys->vi ); free( p_enc->p_sys ); msg_Err( p_enc, "VBR mode initialisation failed" ); return VLC_EGENERIC; } /* Do we have optional hard quality restrictions? */ if( i_max_bitrate > 0 || i_min_bitrate > 0 ) { struct ovectl_ratemanage_arg ai; vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_GET, &ai ); ai.bitrate_hard_min = i_min_bitrate; ai.bitrate_hard_max = i_max_bitrate; ai.management_active = 1; vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, &ai ); } else { /* Turn off management entirely */ vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, NULL ); } } else { if( vorbis_encode_setup_managed( &p_sys->vi, p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate, i_min_bitrate > 0 ? i_min_bitrate * 1000: -1, p_enc->fmt_out.i_bitrate, i_max_bitrate > 0 ? i_max_bitrate * 1000: -1 ) ) { vorbis_info_clear( &p_sys->vi ); msg_Err( p_enc, "CBR mode initialisation failed" ); free( p_enc->p_sys ); return VLC_EGENERIC; } } vorbis_encode_setup_init( &p_sys->vi ); /* Add a comment */ vorbis_comment_init( &p_sys->vc); vorbis_comment_add_tag( &p_sys->vc, "ENCODER", "VLC media player"); /* Set up the analysis state and auxiliary encoding storage */ vorbis_analysis_init( &p_sys->vd, &p_sys->vi ); vorbis_block_init( &p_sys->vd, &p_sys->vb ); /* Create and store headers */ vorbis_analysis_headerout( &p_sys->vd, &p_sys->vc, &header[0], &header[1], &header[2]); for( int i = 0; i < 3; i++ ) { if( xiph_AppendHeaders( &p_enc->fmt_out.i_extra, &p_enc->fmt_out.p_extra, header[i].bytes, header[i].packet ) ) { free(p_enc->fmt_out.p_extra); p_enc->fmt_out.i_extra = 0; p_enc->fmt_out.p_extra = NULL; } } assert(p_sys->vi.channels > 0 && (size_t) p_sys->vi.channels < ARRAY_SIZE(pi_channels_maps) ); p_enc->fmt_out.audio.i_channels = p_enc->fmt_in.audio.i_channels = p_sys->vi.channels; p_enc->fmt_out.audio.i_physical_channels = p_enc->fmt_in.audio.i_physical_channels = pi_channels_maps[p_sys->vi.channels]; p_sys->i_last_block_size = 0; p_sys->i_samples_delay = 0; ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels, p_enc->fmt_in.audio.i_physical_channels); return VLC_SUCCESS; } /**************************************************************************** * Encode: the whole thing **************************************************************************** * This function spits out ogg packets. ****************************************************************************/ static block_t *Encode( encoder_t *p_enc, block_t *p_aout_buf ) { encoder_sys_t *p_sys = p_enc->p_sys; ogg_packet oggpacket; block_t *p_block, *p_chain = NULL; float **buffer; /* Packets are already flushed, see below. */ if( unlikely( !p_aout_buf ) ) return NULL; vlc_tick_t i_pts = p_aout_buf->i_pts - (vlc_tick_t)1000000 * (vlc_tick_t)p_sys->i_samples_delay / (vlc_tick_t)p_enc->fmt_in.audio.i_rate; p_sys->i_samples_delay += p_aout_buf->i_nb_samples; buffer = vorbis_analysis_buffer( &p_sys->vd, p_aout_buf->i_nb_samples ); /* convert samples to float and uninterleave */ const unsigned i_channels = p_enc->fmt_in.audio.i_channels; for( unsigned int i = 0; i < i_channels; i++ ) { for( unsigned int j = 0 ; j < p_aout_buf->i_nb_samples ; j++ ) { buffer[i][j]= ((float *)p_aout_buf->p_buffer) [j * i_channels + p_sys->pi_chan_table[i]]; } } vorbis_analysis_wrote( &p_sys->vd, p_aout_buf->i_nb_samples ); while( vorbis_analysis_blockout( &p_sys->vd, &p_sys->vb ) == 1 ) { int i_samples; vorbis_analysis( &p_sys->vb, NULL ); vorbis_bitrate_addblock( &p_sys->vb ); while( vorbis_bitrate_flushpacket( &p_sys->vd, &oggpacket ) ) { int i_block_size; p_block = block_Alloc( oggpacket.bytes ); memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes ); i_block_size = vorbis_packet_blocksize( &p_sys->vi, &oggpacket ); if( i_block_size < 0 ) i_block_size = 0; i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2; p_sys->i_last_block_size = i_block_size; p_block->i_length = (vlc_tick_t)1000000 * (vlc_tick_t)i_samples / (vlc_tick_t)p_enc->fmt_in.audio.i_rate; p_block->i_dts = p_block->i_pts = i_pts; p_sys->i_samples_delay -= i_samples; /* Update pts */ i_pts += p_block->i_length; block_ChainAppend( &p_chain, p_block ); } } return p_chain; } /***************************************************************************** * CloseEncoder: vorbis encoder destruction *****************************************************************************/ static void CloseEncoder( vlc_object_t *p_this ) { encoder_t *p_enc = (encoder_t *)p_this; encoder_sys_t *p_sys = p_enc->p_sys; vorbis_block_clear( &p_sys->vb ); vorbis_dsp_clear( &p_sys->vd ); vorbis_comment_clear( &p_sys->vc ); vorbis_info_clear( &p_sys->vi ); /* must be called last */ free( p_sys ); } #endif /* HAVE_VORBIS_ENCODER */