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/* This file is part of the HandBrake source code.
Homepage: <http://handbrake.fr/>.
It may be used under the terms of the GNU General Public License. */
#include "hb.h"
#include "theora/codec.h"
#include "theora/theoraenc.h"
int enctheoraInit( hb_work_object_t *, hb_job_t * );
int enctheoraWork( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** );
void enctheoraClose( hb_work_object_t * );
hb_work_object_t hb_enctheora =
{
WORK_ENCTHEORA,
"Theora encoder (libtheora)",
enctheoraInit,
enctheoraWork,
enctheoraClose
};
struct hb_work_private_s
{
hb_job_t * job;
th_enc_ctx * ctx;
};
int enctheoraInit( hb_work_object_t * w, hb_job_t * job )
{
hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
w->private_data = pv;
pv->job = job;
th_info ti;
th_comment tc;
ogg_packet op;
th_info_init( &ti );
/* Frame width and height need to be multiples of 16 */
ti.pic_width = job->width;
ti.pic_height = job->height;
ti.frame_width = (job->width + 0xf) & ~0xf;
ti.frame_height = (job->height + 0xf) & ~0xf;
ti.pic_x = ti.pic_y = 0;
ti.fps_numerator = job->vrate;
ti.fps_denominator = job->vrate_base;
if( job->anamorphic.mode )
{
ti.aspect_numerator = job->anamorphic.par_width;
ti.aspect_denominator = job->anamorphic.par_height;
}
else
{
ti.aspect_numerator = ti.aspect_denominator = 1;
}
ti.colorspace = TH_CS_UNSPECIFIED;
ti.pixel_fmt = TH_PF_420;
if (job->vquality < 0.0)
{
ti.target_bitrate = job->vbitrate * 1000;
ti.quality = 0;
}
else
{
ti.target_bitrate = 0;
if( job->vquality > 0 && job->vquality < 1 )
{
ti.quality = 63 * job->vquality;
}
else
{
ti.quality = job->vquality;
}
}
pv->ctx = th_encode_alloc( &ti );
th_comment_init( &tc );
th_encode_flushheader( pv->ctx, &tc, &op );
memcpy(w->config->theora.headers[0], &op, sizeof(op));
memcpy(w->config->theora.headers[0] + sizeof(op), op.packet, op.bytes );
th_encode_flushheader( pv->ctx, &tc, &op );
memcpy(w->config->theora.headers[1], &op, sizeof(op));
memcpy(w->config->theora.headers[1] + sizeof(op), op.packet, op.bytes );
th_encode_flushheader( pv->ctx, &tc, &op );
memcpy(w->config->theora.headers[2], &op, sizeof(op));
memcpy(w->config->theora.headers[2] + sizeof(op), op.packet, op.bytes );
th_comment_clear( &tc );
return 0;
}
/***********************************************************************
* Close
***********************************************************************
*
**********************************************************************/
void enctheoraClose( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
th_encode_free( pv->ctx );
free( pv );
w->private_data = NULL;
}
/***********************************************************************
* Work
***********************************************************************
*
**********************************************************************/
int enctheoraWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_work_private_t * pv = w->private_data;
hb_job_t * job = pv->job;
hb_buffer_t * in = *buf_in, * buf;
th_ycbcr_buffer ycbcr;
ogg_packet op;
int frame_width, frame_height;
if ( in->size <= 0 )
{
// EOF on input - send it downstream & say we're done.
// XXX may need to flush packets via a call to
// th_encode_packetout( pv->ctx, 1, &op );
// but we don't have a timestamp to put on those packets so we
// drop them for now.
*buf_out = in;
*buf_in = NULL;
return HB_WORK_DONE;
}
memset(&op, 0, sizeof(op));
memset(&ycbcr, 0, sizeof(ycbcr));
frame_width = (job->width + 0xf) & ~0xf;
frame_height = (job->height + 0xf) & ~0xf;
// Y
ycbcr[0].width = frame_width;
ycbcr[0].height = frame_height;
ycbcr[0].stride = job->width;
// CbCr decimated by factor of 2 in both width and height
ycbcr[1].width = ycbcr[2].width = (frame_width + 1) / 2;
ycbcr[1].height = ycbcr[2].height = (frame_height + 1) / 2;
ycbcr[1].stride = ycbcr[2].stride = (job->width + 1) / 2;
ycbcr[0].data = in->data;
ycbcr[1].data = ycbcr[0].data + (ycbcr[0].stride * job->height);
ycbcr[2].data = ycbcr[1].data + (ycbcr[1].stride * ((job->height+1)/2));
th_encode_ycbcr_in( pv->ctx, ycbcr );
th_encode_packetout( pv->ctx, 0, &op );
buf = hb_buffer_init( op.bytes + sizeof(op) );
memcpy(buf->data, &op, sizeof(op));
memcpy(buf->data + sizeof(op), op.packet, op.bytes);
buf->frametype = ( th_packet_iskeyframe(&op) ) ? HB_FRAME_KEY : HB_FRAME_REF;
buf->start = in->start;
buf->stop = in->stop;
*buf_out = buf;
return HB_WORK_OK;
}
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