/* $Id: encfaac.c,v 1.13 2005/03/03 17:21:57 titer Exp $
This file is part of the HandBrake source code.
- Homepage: <http://handbrake.m0k.org/>.
+ Homepage: <http://handbrake.fr/>.
It may be used under the terms of the GNU General Public License. */
#include "hb.h"
unsigned long input_samples;
unsigned long output_bytes;
uint8_t * buf;
-
+ uint8_t * obuf;
hb_list_t * list;
int64_t pts;
-
+ int64_t framedur;
int out_discrete_channels;
-
};
int encfaacInit( hb_work_object_t *, hb_job_t * );
encfaacClose
};
+static const int valid_rates[] =
+{
+ 22050, 24000, 32000, 44100, 48000, 0
+};
+
+static int find_samplerate( int rate )
+{
+ int i;
+
+ for ( i = 0; valid_rates[i] && rate > valid_rates[i]; ++i )
+ {
+ }
+ return i;
+}
+
/***********************************************************************
* hb_work_encfaac_init
***********************************************************************
int encfaacInit( hb_work_object_t * w, hb_job_t * job )
{
hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
+ hb_audio_t * audio = w->audio;
faacEncConfigurationPtr cfg;
uint8_t * bytes;
unsigned long length;
pv->job = job;
/* pass the number of channels used into the private work data */
- pv->out_discrete_channels = HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(w->amixdown);
+ pv->out_discrete_channels = HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(audio->config.out.mixdown);
+
+ /* if the sample rate is 'auto' and that has given us an invalid output */
+ /* rate, map it to the next highest output rate or 48K if above the highest. */
+ int rate_index = find_samplerate(audio->config.out.samplerate);
+ if ( audio->config.out.samplerate != valid_rates[rate_index] )
+ {
+ int rate = valid_rates[valid_rates[rate_index]? rate_index : rate_index - 1];
+ hb_log( "encfaac changing output samplerate from %d to %d",
+ audio->config.out.samplerate, rate );
+ audio->config.out.samplerate = rate;
+
+ /* if the new rate is over the max bandwidth per channel limit */
+ /* lower the bandwidth. */
+ double bw = audio->config.out.bitrate * 1000 / pv->out_discrete_channels;
+ if ( bw > (double)rate * (6144./1024.) )
+ {
+ int newbr = (double)rate * (6.144/1024.) * pv->out_discrete_channels;
+ hb_log( "encfaac changing output bitrate from %d to %d",
+ audio->config.out.bitrate, newbr );
+ audio->config.out.bitrate = newbr;
+ }
+ }
- pv->faac = faacEncOpen( job->arate, pv->out_discrete_channels, &pv->input_samples,
- &pv->output_bytes );
+ pv->faac = faacEncOpen( audio->config.out.samplerate, pv->out_discrete_channels,
+ &pv->input_samples, &pv->output_bytes );
pv->buf = malloc( pv->input_samples * sizeof( float ) );
-
+ pv->obuf = malloc( pv->output_bytes );
+ pv->framedur = 90000LL * pv->input_samples /
+ ( audio->config.out.samplerate * pv->out_discrete_channels );
+
cfg = faacEncGetCurrentConfiguration( pv->faac );
cfg->mpegVersion = MPEG4;
cfg->aacObjectType = LOW;
cfg->allowMidside = 1;
-
+
if (pv->out_discrete_channels == 6) {
/* we are preserving 5.1 audio into 6-channel AAC,
so indicate that we have an lfe channel */
}
cfg->useTns = 0;
- cfg->bitRate = job->abitrate * 1000 / pv->out_discrete_channels; /* Per channel */
+ cfg->bitRate = audio->config.out.bitrate * 1000 / pv->out_discrete_channels; /* Per channel */
cfg->bandWidth = 0;
cfg->outputFormat = 0;
cfg->inputFormat = FAAC_INPUT_FLOAT;
-
- if (pv->out_discrete_channels == 6) {
- /* we are preserving 5.1 audio into 6-channel AAC, and need to
- re-map the output of deca52 into our own mapping - the mapping
- below is the default mapping expected by QuickTime */
- /* This doesn't seem to be correct for VLC on Linux */
- cfg->channel_map[0] = 2;
- cfg->channel_map[1] = 1;
- cfg->channel_map[2] = 3;
- cfg->channel_map[3] = 4;
- cfg->channel_map[4] = 5;
- cfg->channel_map[5] = 0;
+
+ if (audio->config.out.mixdown == HB_AMIXDOWN_6CH && audio->config.in.codec == HB_ACODEC_AC3)
+ {
+ /* we are preserving 5.1 AC-3 audio into 6-channel AAC, and need to
+ re-map the output of deca52 into our own mapping - the mapping
+ below is the default mapping expected by QuickTime */
+ /* DTS output from libdca is already in the right mapping for QuickTime */
+ /* This doesn't seem to be correct for VLC on Linux */
+ cfg->channel_map[0] = 2;
+ cfg->channel_map[1] = 1;
+ cfg->channel_map[2] = 3;
+ cfg->channel_map[3] = 4;
+ cfg->channel_map[4] = 5;
+ cfg->channel_map[5] = 0;
}
-
+
if( !faacEncSetConfiguration( pv->faac, cfg ) )
{
hb_log( "faacEncSetConfiguration failed" );
+ *job->die = 1;
+ return 0;
}
if( faacEncGetDecoderSpecificInfo( pv->faac, &bytes, &length ) < 0 )
{
hb_log( "faacEncGetDecoderSpecificInfo failed" );
+ *job->die = 1;
+ return 0;
}
memcpy( w->config->aac.bytes, bytes, length );
w->config->aac.length = length;
free( bytes );
pv->list = hb_list_init();
- pv->pts = -1;
return 0;
}
void encfaacClose( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
- faacEncClose( pv->faac );
- free( pv->buf );
- hb_list_empty( &pv->list );
- free( pv );
- w->private_data = NULL;
+ if ( pv )
+ {
+ if ( pv->faac )
+ {
+ faacEncClose( pv->faac );
+ pv->faac = NULL;
+ }
+ if ( pv->buf )
+ {
+ free( pv->buf );
+ pv->buf = NULL;
+ }
+ if ( pv->obuf )
+ {
+ free( pv->obuf );
+ pv->obuf = NULL;
+ }
+ if ( pv->list )
+ hb_list_empty( &pv->list );
+
+ free( pv );
+ w->private_data = NULL;
+ }
}
/***********************************************************************
static hb_buffer_t * Encode( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
- hb_buffer_t * buf;
- uint64_t pts, pos;
if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
{
return NULL;
}
+ uint64_t pts, pos;
hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
&pts, &pos );
+ int size = faacEncEncode( pv->faac, (int32_t *)pv->buf, pv->input_samples,
+ pv->obuf, pv->output_bytes );
- buf = hb_buffer_init( pv->output_bytes );
- buf->start = pts + 90000 * pos / pv->out_discrete_channels / sizeof( float ) / pv->job->arate;
- buf->stop = buf->start + 90000 * pv->input_samples / pv->job->arate / pv->out_discrete_channels;
- buf->size = faacEncEncode( pv->faac, (int32_t *) pv->buf,
- pv->input_samples, buf->data, pv->output_bytes );
- buf->key = 1;
-
- if( !buf->size )
+ // AAC needs four frames before it can start encoding so we'll get nothing
+ // on the first three calls to the encoder.
+ if ( size > 0 )
{
- /* Encoding was successful but we got no data. Try to encode
- more */
- hb_buffer_close( &buf );
- return Encode( w );
+ hb_buffer_t * buf = hb_buffer_init( size );
+ memcpy( buf->data, pv->obuf, size );
+ buf->size = size;
+ buf->start = pv->pts;
+ pv->pts += pv->framedur;
+ buf->stop = pv->pts;
+ buf->frametype = HB_FRAME_AUDIO;
+ return buf;
}
- else if( buf->size < 0 )
+ return NULL;
+}
+
+static hb_buffer_t *Flush( hb_work_object_t *w, hb_buffer_t *bufin )
+{
+ hb_work_private_t *pv = w->private_data;
+
+ // pad whatever data we have out to four input frames.
+ int nbytes = hb_list_bytes( pv->list );
+ int pad = pv->input_samples * sizeof(float) * 4 - nbytes;
+ if ( pad > 0 )
{
- hb_log( "faacEncEncode failed" );
- hb_buffer_close( &buf );
- return NULL;
+ hb_buffer_t *tmp = hb_buffer_init( pad );
+ memset( tmp->data, 0, pad );
+ hb_list_add( pv->list, tmp );
}
- return buf;
+ // There are up to three frames buffered in the encoder plus one
+ // in our list buffer so four calls to Encode should get them all.
+ hb_buffer_t *bufout = NULL, *buf = NULL;
+ while ( hb_list_bytes( pv->list ) >= pv->input_samples * sizeof(float) )
+ {
+ hb_buffer_t *b = Encode( w );
+ if ( b )
+ {
+ if ( bufout == NULL )
+ {
+ bufout = b;
+ }
+ else
+ {
+ buf->next = b;
+ }
+ buf = b;
+ }
+ }
+ // add the eof marker to the end of our buf chain
+ if ( buf )
+ buf->next = bufin;
+ else
+ bufout = bufin;
+ return bufout;
}
/***********************************************************************
hb_work_private_t * pv = w->private_data;
hb_buffer_t * buf;
+ if ( (*buf_in)->size <= 0 )
+ {
+ // EOF on input. Finish encoding what we have buffered then send
+ // it & the eof downstream.
+
+ *buf_out = Flush( w, *buf_in );
+ *buf_in = NULL;
+ return HB_WORK_DONE;
+ }
+
hb_list_add( pv->list, *buf_in );
*buf_in = NULL;
buf->next = Encode( w );
buf = buf->next;
}
-
+
return HB_WORK_OK;
}
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