mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-12 13:44:56 +02:00
* Fixed MPEG audio layer III VBR,
* Mac OS X interface thread gets a real-time priority as well to avoid lock-ups, * VLAN error is now a warning.
This commit is contained in:
Christophe Massiot
parent
56fbe6bd7c
commit
07bc016f92
@ -2,7 +2,7 @@
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* mpeg_audio.c: parse MPEG audio sync info and packetize the stream
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*****************************************************************************
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* Copyright (C) 2001-2003 VideoLAN
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* $Id: mpeg_audio.c,v 1.3 2003/01/15 13:58:28 massiot Exp $
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* $Id: mpeg_audio.c,v 1.4 2003/01/15 23:55:22 massiot Exp $
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*
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* Authors: Laurent Aimar <fenrir@via.ecp.fr>
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* Eric Petit <titer@videolan.org>
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@ -113,6 +113,8 @@ static int RunDecoder( decoder_fifo_t *p_fifo )
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dec_thread_t * p_dec;
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audio_date_t end_date;
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unsigned int i_layer = 0;
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byte_t p_sync[MAD_BUFFER_GUARD];
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mtime_t pts;
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/* Allocate the memory needed to store the thread's structure */
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p_dec = malloc( sizeof(dec_thread_t) );
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@ -140,39 +142,73 @@ static int RunDecoder( decoder_fifo_t *p_fifo )
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return -1;
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}
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/* Init sync buffer. */
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NextPTS( &p_dec->bit_stream, &pts, NULL );
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GetChunk( &p_dec->bit_stream, p_sync, MAD_BUFFER_GUARD );
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/* Decoder thread's main loop */
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while ( !p_dec->p_fifo->b_die && !p_dec->p_fifo->b_error )
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{
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int i_bit_rate;
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unsigned int i_rate, i_original_channels, i_frame_size, i_frame_length;
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unsigned int i_new_layer, i_current_frame_size;
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mtime_t pts;
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uint32_t i_header;
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aout_buffer_t * p_buffer;
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int i;
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/* Look for sync word - should be 0xfff */
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RealignBits( &p_dec->bit_stream );
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if ( ShowBits( &p_dec->bit_stream, 11 ) != 0x07ff )
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/* Look for sync word - should be 0xffe */
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if ( (p_sync[0] != 0xff) || ((p_sync[1] & 0xe0) != 0xe0) )
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{
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msg_Warn( p_dec->p_fifo, "no sync - skipping" );
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}
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while ( ShowBits( &p_dec->bit_stream, 11 ) != 0x07ff &&
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(!p_dec->p_fifo->b_die) && (!p_dec->p_fifo->b_error) )
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{
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RemoveBits( &p_dec->bit_stream, 8 );
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/* Look inside the sync buffer. */
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for ( i = 1; i < MAD_BUFFER_GUARD - 1; i++ )
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{
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if ( (p_sync[i] == 0xff) && ((p_sync[i + 1] & 0xe0) != 0xe0) )
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break;
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}
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if ( i < MAD_BUFFER_GUARD - 1 )
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{
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/* Found it ! */
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memmove( p_sync, &p_sync[i], MAD_BUFFER_GUARD - i );
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GetChunk( &p_dec->bit_stream, &p_sync[MAD_BUFFER_GUARD - i],
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i );
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}
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else
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{
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if ( p_sync[MAD_BUFFER_GUARD - 1] == 0xff
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&& ShowBits( &p_dec->bit_stream, 3 ) == 0x3 )
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{
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/* Found it ! */
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p_sync[0] = p_sync[MAD_BUFFER_GUARD - 1];
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GetChunk( &p_dec->bit_stream,
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&p_sync[1], MAD_BUFFER_GUARD - 1 );
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}
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else
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{
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/* Scan the stream. */
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while ( ShowBits( &p_dec->bit_stream, 11 ) != 0x07ff &&
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(!p_dec->p_fifo->b_die) &&
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(!p_dec->p_fifo->b_error) )
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{
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RemoveBits( &p_dec->bit_stream, 8 );
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}
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if ( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error )
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break;
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GetChunk( &p_dec->bit_stream,p_sync, MAD_BUFFER_GUARD );
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}
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}
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}
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if ( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error ) break;
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/* Set the Presentation Time Stamp */
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NextPTS( &p_dec->bit_stream, &pts, NULL );
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if ( pts != 0 && pts != aout_DateGet( &end_date ) )
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{
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aout_DateSet( &end_date, pts );
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}
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/* Get frame header */
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i_header = ShowBits( &p_dec->bit_stream, 32 );
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if ( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error ) break;
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i_header = (p_sync[0] << 24) | (p_sync[1] << 16) | (p_sync[2] << 8)
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| p_sync[3];
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/* Check if frame is valid and get frame info */
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i_current_frame_size = SyncInfo( i_header,
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@ -180,12 +216,21 @@ static int RunDecoder( decoder_fifo_t *p_fifo )
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&i_bit_rate, &i_frame_length,
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&i_frame_size, &i_new_layer );
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if( !i_current_frame_size )
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if ( !i_current_frame_size )
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{
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msg_Warn( p_dec->p_fifo, "syncinfo failed" );
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/* This is probably an emulated startcode, drop the first byte
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* to force looking for the next startcode. */
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RemoveBits( &p_dec->bit_stream, 8 );
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memmove( p_sync, &p_sync[1], MAD_BUFFER_GUARD - 1 );
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p_sync[MAD_BUFFER_GUARD - 1] = GetBits( &p_dec->bit_stream, 8 );
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continue;
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}
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if ( i_current_frame_size > i_frame_size )
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{
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msg_Warn( p_dec->p_fifo, "frame too big %d > %d",
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i_current_frame_size, i_frame_size );
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memmove( p_sync, &p_sync[1], MAD_BUFFER_GUARD - 1 );
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p_sync[MAD_BUFFER_GUARD - 1] = GetBits( &p_dec->bit_stream, 8 );
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continue;
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}
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@ -240,6 +285,8 @@ static int RunDecoder( decoder_fifo_t *p_fifo )
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/* We've just started the stream, wait for the first PTS. */
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GetChunk( &p_dec->bit_stream, p_junk, i_current_frame_size );
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memcpy( p_sync, &p_junk[i_current_frame_size - MAD_BUFFER_GUARD],
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MAD_BUFFER_GUARD );
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continue;
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}
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@ -255,14 +302,23 @@ static int RunDecoder( decoder_fifo_t *p_fifo )
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i_frame_length );
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/* Get the whole frame. */
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GetChunk( &p_dec->bit_stream, p_buffer->p_buffer,
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i_current_frame_size );
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memcpy( p_buffer->p_buffer, p_sync, MAD_BUFFER_GUARD );
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GetChunk( &p_dec->bit_stream, p_buffer->p_buffer + MAD_BUFFER_GUARD,
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i_current_frame_size - MAD_BUFFER_GUARD );
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if( p_dec->p_fifo->b_die )
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{
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aout_DecDeleteBuffer( p_dec->p_aout, p_dec->p_aout_input,
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p_buffer );
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break;
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}
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/* Get beginning of next frame. */
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NextPTS( &p_dec->bit_stream, &pts, NULL );
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GetChunk( &p_dec->bit_stream, p_buffer->p_buffer + i_current_frame_size,
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MAD_BUFFER_GUARD );
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memcpy( p_sync, p_buffer->p_buffer + i_current_frame_size,
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MAD_BUFFER_GUARD );
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p_buffer->i_nb_bytes = i_current_frame_size + MAD_BUFFER_GUARD;
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/* Send the buffer to the aout core. */
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aout_DecPlay( p_dec->p_aout, p_dec->p_aout_input, p_buffer );
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@ -337,6 +393,7 @@ static int SyncInfo( uint32_t i_header, unsigned int * pi_channels,
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vlc_bool_t b_padding, b_mpeg_2_5;
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int i_current_frame_size = 0;
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int i_bitrate_index, i_samplerate_index;
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int i_max_bit_rate;
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b_mpeg_2_5 = 1 - ((i_header & 0x100000) >> 20);
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i_version = 1 - ((i_header & 0x80000) >> 19);
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@ -370,6 +427,7 @@ static int SyncInfo( uint32_t i_header, unsigned int * pi_channels,
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break;
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}
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*pi_bit_rate = pppi_mpegaudio_bitrate[i_version][*pi_layer-1][i_bitrate_index];
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i_max_bit_rate = pppi_mpegaudio_bitrate[i_version][*pi_layer-1][14];
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*pi_sample_rate = ppi_mpegaudio_samplerate[i_version][i_samplerate_index];
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if ( b_mpeg_2_5 )
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@ -384,7 +442,7 @@ static int SyncInfo( uint32_t i_header, unsigned int * pi_channels,
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*pi_bit_rate / *pi_sample_rate
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+ b_padding ) * 4;
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*pi_frame_size = ( ( i_version ? 6000 : 12000 ) *
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*pi_bit_rate / *pi_sample_rate + 1 ) * 4;
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i_max_bit_rate / *pi_sample_rate + 1 ) * 4;
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*pi_frame_length = 384;
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break;
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@ -393,7 +451,7 @@ static int SyncInfo( uint32_t i_header, unsigned int * pi_channels,
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*pi_bit_rate / *pi_sample_rate
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+ b_padding;
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*pi_frame_size = ( i_version ? 72000 : 144000 ) *
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*pi_bit_rate / *pi_sample_rate + 1;
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i_max_bit_rate / *pi_sample_rate + 1;
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*pi_frame_length = 1152;
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break;
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@ -402,7 +460,7 @@ static int SyncInfo( uint32_t i_header, unsigned int * pi_channels,
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*pi_bit_rate / *pi_sample_rate
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+ b_padding;
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*pi_frame_size = ( i_version ? 72000 : 144000 ) *
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*pi_bit_rate / *pi_sample_rate + 1;
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i_max_bit_rate / *pi_sample_rate + 1;
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*pi_frame_length = i_version ? 576 : 1152;
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break;
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@ -2,7 +2,7 @@
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* intf.m: MacOS X interface plugin
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*****************************************************************************
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* Copyright (C) 2002-2003 VideoLAN
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* $Id: intf.m,v 1.24 2003/01/15 00:49:49 jlj Exp $
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* $Id: intf.m,v 1.25 2003/01/15 23:55:22 massiot Exp $
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*
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* Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
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* Christophe Massiot <massiot@via.ecp.fr>
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@ -94,6 +94,11 @@ void E_(CloseIntf) ( vlc_object_t *p_this )
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*****************************************************************************/
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static void Run( intf_thread_t *p_intf )
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{
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/* Do it again - for some unknown reason, vlc_thread_create() often
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* fails to go to real-time priority with the first launched thread
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* (???) --Meuuh */
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vlc_thread_set_priority( p_intf, VLC_THREAD_PRIORITY_LOW );
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[NSApp run];
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}
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@ -2,7 +2,7 @@
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* netutils.c: various network functions
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*****************************************************************************
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* Copyright (C) 1999-2001 VideoLAN
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* $Id: netutils.c,v 1.77 2002/11/13 20:51:05 sam Exp $
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* $Id: netutils.c,v 1.78 2003/01/15 23:55:22 massiot Exp $
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*
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* Authors: Vincent Seguin <seguin@via.ecp.fr>
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* Benoit Steiner <benny@via.ecp.fr>
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@ -127,8 +127,8 @@ static int GetAdapterInfo ( int i_adapter, char *psz_string );
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int __network_ChannelCreate( vlc_object_t *p_this )
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{
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#if !defined( SYS_LINUX ) && !( defined( WIN32 ) && !defined( UNDER_CE ) )
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msg_Err( p_this, "VLAN-based channels are not supported "
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"on this architecture" );
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msg_Warn( p_this, "VLAN-based channels are not supported "
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"on this architecture" );
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#endif
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/* Allocate structure */
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