C++ date_Get函数代码示例

/*****************************************************************************
 * Demux: read packet and send them to decoders
 *****************************************************************************
 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 *****************************************************************************/
static int Demux( demux_t *p_demux )
{
    demux_sys_t *p_sys = p_demux->p_sys;
    block_t     *p_block;
    vlc_tick_t  i_date;

    p_block = vlc_stream_Block( p_demux->s, CDG_FRAME_SIZE );
    if( p_block == NULL )
    {
        msg_Dbg( p_demux, "cannot read data, eof" );
        return VLC_DEMUXER_EOF;
    }

    i_date = PosToDate( p_demux );
    if( i_date >= date_Get( &p_sys->pts ) + CDG_FRAME_DELTA )
    {
        p_block->i_dts = p_block->i_pts = VLC_TICK_0 + i_date;
        date_Set( &p_sys->pts, VLC_TICK_0 + i_date );
    }
    else
    {
        p_block->i_dts = VLC_TICK_0 + i_date;
        p_block->i_pts = date_Get( &p_sys->pts );
    }

    es_out_SetPCR( p_demux->out, p_block->i_pts );
    es_out_Send( p_demux->out, p_sys->p_es, p_block );
    return VLC_DEMUXER_SUCCESS;
}

/*****************************************************************************
 * Demux: read packet and send them to decoders
 *****************************************************************************
 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 *****************************************************************************/
static int Demux( demux_t *p_demux )
{
    demux_sys_t *p_sys = p_demux->p_sys;
    block_t     *p_block;
    mtime_t     i_date;
    mtime_t     i_delta;

    i_delta = INT64_C(1000000) / CDG_FRAME_RATE;

    p_block = vlc_stream_Block( p_demux->s, CDG_FRAME_SIZE );
    if( p_block == NULL )
    {
        msg_Dbg( p_demux, "cannot read data, eof" );
        return 0;
    }

    i_date = vlc_stream_Tell( p_demux->s ) / CDG_FRAME_SIZE * i_delta;
    if( i_date >= date_Get( &p_sys->pts ) + i_delta )
    {
        p_block->i_dts = p_block->i_pts = i_date;
        date_Set( &p_sys->pts, i_date );
    }
    else
    {
        p_block->i_dts = i_date;
        p_block->i_pts = date_Get( &p_sys->pts );
    }

    es_out_SetPCR( p_demux->out, p_block->i_pts );

    es_out_Send( p_demux->out, p_sys->p_es, p_block );

    return 1;
}

/*****************************************************************************
 * ProcessPacket: processes a Opus packet.
 *****************************************************************************/
static void *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;

    /* Date management */
    if( p_block && 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 );
    }

    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;
    }

    *pp_block = NULL; /* To avoid being fed the same packet again */

    if( !p_block )
        return NULL;

    block_t *p_aout_buffer = DecodePacket( p_dec, p_oggpacket,
                                           p_block->i_nb_samples,
                                           (int)p_block->i_length );

    block_Release( p_block );
    return p_aout_buffer;
}

static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t *p_block )
{
    decoder_t *p_dec = p_private;
    decoder_sys_t *p_sys = p_dec->p_sys;

    const uint8_t *p_buf = &p_block->p_buffer[2];
    size_t i_buf = p_block->i_buffer - 2;

    while( i_buf > 4 && p_buf[0] == 0xFF )
    {
        size_t i_size = 2 + GetWBE( &p_buf[2] );
        if( i_size > i_buf )
            break;
        if( p_buf[1] == 0xC0 && i_buf > 9 )
        {
            uint16_t i_height = GetWBE( &p_buf[5] );
            uint16_t i_width = GetWBE( &p_buf[7] );
            if( i_height && i_width &&
                (p_dec->fmt_out.video.i_height != i_height ||
                 p_dec->fmt_out.video.i_width != i_width) )
            {
                p_dec->fmt_out.video.i_width =
                p_dec->fmt_out.video.i_visible_width = i_width;
                p_dec->fmt_out.video.i_height =
                p_dec->fmt_out.video.i_visible_height = i_height;
            }
            break;
        }
        i_buf -= i_size;
        p_buf += i_size;
    }

    if( p_block->i_dts == VLC_TICK_INVALID )
        p_block->i_dts = p_block->i_pts;
    else if( p_block->i_pts == VLC_TICK_INVALID )
        p_block->i_pts = p_block->i_dts;

    vlc_tick_t i_prev_dts = date_Get( &p_sys->date );
    if( p_block->i_dts != VLC_TICK_INVALID )
    {
        date_Set( &p_sys->date, p_block->i_dts );
    }
    else if( p_dec->fmt_in.video.i_frame_rate &&
             p_dec->fmt_in.video.i_frame_rate_base )
    {
        date_Increment( &p_sys->date, 1 );
        p_block->i_dts = p_block->i_pts = date_Get( &p_sys->date );
    }

    if( i_prev_dts != VLC_TICK_INVALID && p_block->i_dts != VLC_TICK_INVALID )
        p_block->i_length = p_block->i_dts - i_prev_dts;

    *pb_ts_used = true;

    p_block->i_flags = p_sys->i_next_block_flags | BLOCK_FLAG_TYPE_I;
    p_sys->i_next_block_flags = 0;

    return p_block;
}

static int Control(demux_t *demux, int query, va_list args)
{
    demux_sys_t *sys = demux->p_sys;

    switch (query) {
    case DEMUX_CAN_SEEK:
        *va_arg(args, bool *) = sys->duration >= 0 && !sys->is_realtime;
        return VLC_SUCCESS;
    case DEMUX_GET_POSITION: {
        double *position = va_arg(args, double *);
        if (sys->duration > 0)
            *position = date_Get(&sys->pts) / (double)sys->duration;
        else
            *position = 0;
        return VLC_SUCCESS;
    }
    case DEMUX_SET_POSITION: {
        if (sys->duration < 0 || sys->is_realtime)
            return VLC_EGENERIC;
        double position = va_arg(args, double);
        date_Set(&sys->pts, position * sys->duration);
        return VLC_SUCCESS;
    }
    case DEMUX_GET_TIME: {
        int64_t *time = va_arg(args, int64_t *);
        *time = sys->pts_origin + date_Get(&sys->pts);
        return VLC_SUCCESS;
    }
    case DEMUX_SET_TIME: {
        if (sys->duration < 0 || sys->is_realtime)
            return VLC_EGENERIC;
        int64_t time = va_arg(args, int64_t);
        date_Set(&sys->pts, VLC_CLIP(time - sys->pts_origin, 0, sys->duration));
        return VLC_SUCCESS;
    }
    case DEMUX_SET_NEXT_DEMUX_TIME: {
        int64_t pts_next = VLC_TS_0 + va_arg(args, int64_t);
        if (sys->pts_next <= VLC_TS_INVALID)
            sys->pts_origin = pts_next;
        sys->pts_next = pts_next;
        return VLC_SUCCESS;
    }
    case DEMUX_GET_LENGTH: {
        int64_t *length = va_arg(args, int64_t *);
        *length = __MAX(sys->duration, 0);
        return VLC_SUCCESS;
    }
    case DEMUX_GET_FPS: {
        double *fps = va_arg(args, double *);
        *fps = (double)sys->pts.i_divider_num / sys->pts.i_divider_den;
        return VLC_SUCCESS;
    }
    case DEMUX_GET_META:
    case DEMUX_HAS_UNSUPPORTED_META:
    case DEMUX_GET_ATTACHMENTS:
    default:
        return VLC_EGENERIC;
    }
}

/*****************************************************************************
 * Thread:
 *****************************************************************************/
static void *Thread( void *p_thread_data )
{
    goom_thread_t *p_thread = (goom_thread_t*)p_thread_data;
    date_t i_pts;
    int16_t p_data[2][512];
    int i_data = 0, i_count = 0;
    PluginInfo *p_plugin_info;
    int canc = vlc_savecancel ();

    p_plugin_info = goom_init( p_thread->i_width, p_thread->i_height );

    for( ;; )
    {
        uint32_t  *plane;
        picture_t *p_pic;

        /* FIXME the way the update is done is not really good.
         *  Supurious wake up from p_thread->wait will make it generates a frame
         * without using new samples (probably rare as we should not be waiting
         * samples).
         *  The frame rate at which the video is generated is not well controlled
         * nor the time at which each frame is displayed (not smooth)
         */
        /* goom_update is damn slow, so just copy data and release the lock */
        vlc_mutex_lock( &p_thread->lock );
        if( !p_thread->b_exit &&
            FillBuffer( (int16_t *)p_data, &i_data,
                        &i_pts, &p_thread->date, p_thread ) != VLC_SUCCESS )
            vlc_cond_wait( &p_thread->wait, &p_thread->lock );
        bool b_exit = p_thread->b_exit;
        vlc_mutex_unlock( &p_thread->lock );

        if( b_exit )
            break;

        /* Speed selection */
        if( p_thread->i_speed && (++i_count % (p_thread->i_speed+1)) ) continue;

        /* Frame dropping if necessary */
        if( date_Get( &i_pts ) + GOOM_DELAY <= mdate() ) continue;

        plane = goom_update( p_plugin_info, p_data, 0, 0.0,
                             NULL, NULL );

        p_pic = vout_GetPicture( p_thread->p_vout );
        if( unlikely(p_pic == NULL) )
            continue;

        memcpy( p_pic->p[0].p_pixels, plane, p_thread->i_width * p_thread->i_height * 4 );

        p_pic->date = date_Get( &i_pts ) + GOOM_DELAY;
        vout_PutPicture( p_thread->p_vout, p_pic );
    }

    goom_close( p_plugin_info );
    vlc_restorecancel (canc);
    return NULL;
}

/****************************************************************************
 * DecodeBlock: the whole thing
 ****************************************************************************
 * This function must be fed with whole samples (see nBlockAlign).
 ****************************************************************************/
static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    if( !pp_block || !*pp_block ) return NULL;

    block_t *p_block = *pp_block;

    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 );
    }
    else if( !date_Get( &p_sys->end_date ) )
    {
        /* We've just started the stream, wait for the first PTS. */
        block_Release( p_block );
        return NULL;
    }

    /* Don't re-use the same pts twice */
    p_block->i_pts = VLC_TS_INVALID;

    unsigned samples = (8 * p_block->i_buffer) / p_sys->framebits;
    if( samples == 0 )
    {
        block_Release( p_block );
        return NULL;
    }

    /* Create chunks of max 1024 samples */
    if( samples > 1024 ) samples = 1024;

    block_t *p_out = decoder_NewAudioBuffer( p_dec, samples );
    if( p_out == NULL )
    {
        block_Release( p_block );
        return NULL;
    }

    p_out->i_pts = date_Get( &p_sys->end_date );
    p_out->i_length = date_Increment( &p_sys->end_date, samples )
                      - p_out->i_pts;

    if( p_sys->decode != NULL )
        p_sys->decode( p_out->p_buffer, p_block->p_buffer,
                       samples * p_dec->fmt_in.audio.i_channels );
    else
        memcpy( p_out->p_buffer, p_block->p_buffer, p_out->i_buffer );

    samples = (samples * p_sys->framebits) / 8;
    p_block->p_buffer += samples;
    p_block->i_buffer -= samples;

    return p_out;
}

/****************************************************************************
 * DecodeBlock: the whole thing
 ****************************************************************************
 * This function must be fed with whole samples (see nBlockAlign).
 ****************************************************************************/
static int DecodeBlock( decoder_t *p_dec, block_t *p_block )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    if( p_block == NULL ) /* No Drain */
        return VLCDEC_SUCCESS;

    if( p_block->i_flags & (BLOCK_FLAG_CORRUPTED|BLOCK_FLAG_DISCONTINUITY) )
    {
        Flush( p_dec );
        if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
            goto skip;
    }

    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 );
    }
    else if( !date_Get( &p_sys->end_date ) )
        /* We've just started the stream, wait for the first PTS. */
        goto skip;

    unsigned samples = (8 * p_block->i_buffer) / p_sys->framebits;
    if( samples == 0 )
        goto skip;

    if( p_sys->decode != NULL )
    {
        if( decoder_UpdateAudioFormat( p_dec ) )
            goto skip;
        block_t *p_out = decoder_NewAudioBuffer( p_dec, samples );
        if( p_out == NULL )
            goto skip;

        p_sys->decode( p_out->p_buffer, p_block->p_buffer,
                       samples * p_dec->fmt_in.audio.i_channels );
        block_Release( p_block );
        p_block = p_out;
    }
    else
    {
        decoder_UpdateAudioFormat( p_dec );
        p_block->i_nb_samples = samples;
        p_block->i_buffer = samples * (p_sys->framebits / 8);
    }

    p_block->i_pts = date_Get( &p_sys->end_date );
    p_block->i_length = date_Increment( &p_sys->end_date, samples )
                      - p_block->i_pts;
    decoder_QueueAudio( p_dec, p_block );
    return VLCDEC_SUCCESS;
skip:
    block_Release( p_block );
    return VLCDEC_SUCCESS;
}

/*****************************************************************************
 * Demux: read chunks and send them to the synthesizer
 *****************************************************************************
 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 *****************************************************************************/
static int Demux (demux_t *p_demux)
{
    stream_t *s = p_demux->s;
    demux_sys_t *p_sys = p_demux->p_sys;
    uint64_t     pulse = p_sys->pulse, next_pulse = UINT64_MAX;

    if (pulse == UINT64_MAX)
        return 0; /* all tracks are done */

    es_out_Control (p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + date_Get (&p_sys->pts));

    for (unsigned i = 0; i < p_sys->trackc; i++)
    {
        mtrk_t *track = p_sys->trackv + i;

        while (track->next == pulse)
        {
            if (HandleMessage (p_demux, track)
             || ReadDeltaTime (s, track))
            {
                msg_Err (p_demux, "fatal parsing error");
                return VLC_EGENERIC;
            }
        }

        if (track->next < next_pulse)
            next_pulse = track->next;
    }

    mtime_t cur_tick = (date_Get (&p_sys->pts) + 9999) / 10000, last_tick;
    if (next_pulse != UINT64_MAX)
        last_tick = date_Increment (&p_sys->pts, next_pulse - pulse) / 10000;
    else
        last_tick = cur_tick + 1;

    /* MIDI Tick emulation (ping the decoder every 10ms) */
    while (cur_tick < last_tick)
    {
        block_t *tick = block_New (p_demux, 1);
        if (tick == NULL)
            break;

        tick->p_buffer[0] = 0xF9;
        tick->i_dts = tick->i_pts = VLC_TS_0 + cur_tick++ * 10000;
        es_out_Send (p_demux->out, p_sys->es, tick);
    }

    p_sys->pulse = next_pulse;

    return 1;
}

/****************************************************************************
 * DecodeBlock: the whole thing
 ****************************************************************************
 * This function must be fed with whole samples (see nBlockAlign).
 ****************************************************************************/
static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    if( pp_block == NULL )
        return NULL;

    block_t *p_block = *pp_block;
    if( p_block == NULL )
        return NULL;
    *pp_block = NULL;

    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 );
    }
    else if( !date_Get( &p_sys->end_date ) )
        /* We've just started the stream, wait for the first PTS. */
        goto skip;

    unsigned samples = (8 * p_block->i_buffer) / p_sys->framebits;
    if( samples == 0 )
        goto skip;

    if( p_sys->decode != NULL )
    {
        block_t *p_out = decoder_NewAudioBuffer( p_dec, samples );
        if( p_out == NULL )
            goto skip;

        p_sys->decode( p_out->p_buffer, p_block->p_buffer,
                       samples * p_dec->fmt_in.audio.i_channels );
        block_Release( p_block );
        p_block = p_out;
    }
    else
    {
        decoder_UpdateAudioFormat( p_dec );
        p_block->i_nb_samples = samples;
        p_block->i_buffer = samples * (p_sys->framebits / 8);
    }

    p_block->i_pts = date_Get( &p_sys->end_date );
    p_block->i_length = date_Increment( &p_sys->end_date, samples )
                      - p_block->i_pts;
    return p_block;
skip:
    block_Release( p_block );
    return NULL;
}

static int Demux (demux_t *demux)
{
    demux_sys_t *sys = demux->p_sys;

    block_t *block = block_Alloc( sys->block_size);
    if (unlikely(block==NULL))
        return 0;

    if (!sys->tune->getStatus()) {
        block_Release (block);
        return 0;
    }

    int i_read = sys->player->play ((void*)block->p_buffer, block->i_buffer);
    if (i_read <= 0) {
        block_Release (block);
        return 0;
    }
    block->i_buffer = i_read;
    block->i_pts = block->i_dts = VLC_TS_0 + date_Get (&sys->pts);

    es_out_Control (demux->out, ES_OUT_SET_PCR, block->i_pts);

    es_out_Send (demux->out, sys->es, block);

    date_Increment (&sys->pts, i_read / sys->bytes_per_frame);

    return 1;
}

/*****************************************************************************
 * DecodePacket: decodes a Speex packet.
 *****************************************************************************/
static block_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    if( p_oggpacket->bytes )
    {
        /* Copy Ogg packet to Speex bitstream */
        speex_bits_read_from( &p_sys->bits, (char *)p_oggpacket->packet,
                              p_oggpacket->bytes );
        p_sys->i_frame_in_packet = 0;
    }

    /* Decode one frame at a time */
    if( p_sys->i_frame_in_packet < p_sys->p_header->frames_per_packet )
    {
        block_t *p_aout_buffer;
        if( p_sys->p_header->frame_size == 0 )
            return NULL;

        p_aout_buffer =
            decoder_NewAudioBuffer( p_dec, p_sys->p_header->frame_size );
        if( !p_aout_buffer )
        {
            return NULL;
        }

        switch( speex_decode_int( p_sys->p_state, &p_sys->bits,
                                  (int16_t *)p_aout_buffer->p_buffer ) )
        {
            case -2:
                msg_Err( p_dec, "decoding error: corrupted stream?" );
            case -1: /* End of stream */
                return NULL;
        }

        if( speex_bits_remaining( &p_sys->bits ) < 0 )
        {
            msg_Err( p_dec, "decoding overflow: corrupted stream?" );
        }

        if( p_sys->p_header->nb_channels == 2 )
            speex_decode_stereo_int( (int16_t *)p_aout_buffer->p_buffer,
                                     p_sys->p_header->frame_size,
                                     &p_sys->stereo );

        /* Date management */
        p_aout_buffer->i_pts = date_Get( &p_sys->end_date );
        p_aout_buffer->i_length =
            date_Increment( &p_sys->end_date, p_sys->p_header->frame_size )
            - p_aout_buffer->i_pts;

        p_sys->i_frame_in_packet++;

        return p_aout_buffer;
    }
    else
    {
        return NULL;
    }
}

/*****************************************************************************
 * Demux:
 *****************************************************************************/
static int Demux( demux_t *p_demux )
{
    demux_sys_t *p_sys = p_demux->p_sys;
    block_t     *p_frame;
    const int i_bk = ( p_sys->fmt.audio.i_bitspersample / 8 ) *
                       p_sys->fmt.audio.i_channels;

    p_frame = block_Alloc( p_sys->fmt.audio.i_rate / 10 * i_bk );
    if( !p_frame )
        return VLC_DEMUXER_EGENERIC;

    const int i_read = ModPlug_Read( p_sys->f, p_frame->p_buffer, p_frame->i_buffer );
    if( i_read <= 0 )
    {
        /* EOF */
        block_Release( p_frame );
        return VLC_DEMUXER_EOF;
    }
    p_frame->i_buffer = i_read;
    p_frame->i_dts =
    p_frame->i_pts = date_Get( &p_sys->pts );

    es_out_SetPCR( p_demux->out, p_frame->i_pts );
    es_out_Send( p_demux->out, p_sys->es, p_frame );
    date_Increment( &p_sys->pts, i_read / i_bk );
    return VLC_DEMUXER_SUCCESS;
}

/*****************************************************************************
 * SplitBuffer: Needed because aout really doesn't like big audio chunk and
 * wma produces easily > 30000 samples...
 *****************************************************************************/
static aout_buffer_t *SplitBuffer( decoder_t *p_dec )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    int i_samples = __MIN( p_sys->i_samples, 4096 );
    aout_buffer_t *p_buffer;

    if( i_samples == 0 ) return NULL;

    if( ( p_buffer = decoder_NewAudioBuffer( p_dec, i_samples ) ) == NULL )
        return NULL;

    p_buffer->i_pts = date_Get( &p_sys->end_date );
    p_buffer->i_length = date_Increment( &p_sys->end_date, i_samples )
                         - p_buffer->i_pts;

    if( p_sys->b_extract )
        aout_ChannelExtract( p_buffer->p_buffer, p_dec->fmt_out.audio.i_channels,
                             p_sys->p_samples, p_sys->p_context->channels, i_samples,
                             p_sys->pi_extraction, p_dec->fmt_out.audio.i_bitspersample );
    else
        memcpy( p_buffer->p_buffer, p_sys->p_samples, p_buffer->i_buffer );

    p_sys->p_samples += i_samples * p_sys->p_context->channels * ( p_dec->fmt_out.audio.i_bitspersample / 8 );
    p_sys->i_samples -= i_samples;

    return p_buffer;
}

static int Audio_OnNewBlock(decoder_t *p_dec, block_t *p_block, int *p_flags)
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    /* We've just started the stream, wait for the first PTS. */
    if (!date_Get(&p_sys->u.audio.i_end_date))
    {
        if (p_block->i_pts <= VLC_TS_INVALID)
            return 0;
        date_Set(&p_sys->u.audio.i_end_date, p_block->i_pts);
    }

    /* try delayed opening if there is a new extra data */
    if (!p_sys->api->b_started)
    {
        p_dec->p_sys->u.audio.i_channels = p_dec->fmt_in.audio.i_channels;

        *p_flags |= NEWBLOCK_FLAG_RESTART;

        /* Don't start if we don't have any csd */
        if ((p_sys->i_quirks & OMXCODEC_QUIRKS_NEED_CSD)
         && !p_dec->fmt_in.i_extra)
            *p_flags &= ~NEWBLOCK_FLAG_RESTART;

        /* Don't start if we don't have a valid channels count */
        if ((p_sys->i_quirks & OMXCODEC_AUDIO_QUIRKS_NEED_CHANNELS)
         && !p_dec->p_sys->u.audio.i_channels)
            *p_flags &= ~NEWBLOCK_FLAG_RESTART;
    }
    return 1;
}