--- /dev/null
+/*****************************************************************************
+ * dirac.c: Dirac decoder/encoder module making use of libdirac.
+ * (http://www.bbc.co.uk/rd/projects/dirac/index.shtml)
+ *****************************************************************************
+ * Copyright (C) 1999-2001 VideoLAN
+ * $Id$
+ *
+ * Authors: Gildas Bazin <gbazin@videolan.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <vlc/vlc.h>
+#include <vlc/decoder.h>
+#include <vlc/sout.h>
+
+#include <libdirac_decoder/dirac_parser.h>
+#include <libdirac_encoder/dirac_encoder.h>
+
+/*****************************************************************************
+ * decoder_sys_t : theora decoder descriptor
+ *****************************************************************************/
+struct decoder_sys_t
+{
+ /*
+ * Dirac properties
+ */
+ dirac_decoder_t *p_dirac;
+};
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int OpenDecoder ( vlc_object_t * );
+static void CloseDecoder ( vlc_object_t * );
+static picture_t *DecodeBlock ( decoder_t *p_dec, block_t **pp_block );
+
+static int OpenEncoder( vlc_object_t *p_this );
+static void CloseEncoder( vlc_object_t *p_this );
+static block_t *Encode( encoder_t *p_enc, picture_t *p_pict );
+
+#define ENC_CFG_PREFIX "sout-dirac-"
+
+static const char *ppsz_enc_options[] = {
+ "quality", NULL
+};
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+#define ENC_QUALITY_TEXT N_("Encoding quality")
+#define ENC_QUALITY_LONGTEXT N_( \
+ "Allows you to specify a quality between 1.0 (low) and 10.0 (high)." )
+
+vlc_module_begin();
+ set_category( CAT_INPUT );
+ set_subcategory( SUBCAT_INPUT_VCODEC );
+ set_description( _("Dirac video decoder") );
+ set_capability( "decoder", 100 );
+ set_callbacks( OpenDecoder, CloseDecoder );
+ add_shortcut( "dirac" );
+
+ add_submodule();
+ set_description( _("Dirac video encoder") );
+ set_capability( "encoder", 100 );
+ set_callbacks( OpenEncoder, CloseEncoder );
+ add_shortcut( "dirac" );
+ add_float( ENC_CFG_PREFIX "quality", 7.0, NULL, ENC_QUALITY_TEXT,
+ ENC_QUALITY_LONGTEXT, VLC_FALSE );
+
+vlc_module_end();
+
+/*****************************************************************************
+ * 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;
+ dirac_decoder_t *p_dirac;
+
+ if( p_dec->fmt_in.i_codec != VLC_FOURCC('d','r','a','c') )
+ {
+ return VLC_EGENERIC;
+ }
+
+ /* Initialise the dirac decoder */
+ if( !(p_dirac = dirac_decoder_init(0)) ) return VLC_EGENERIC;
+
+ /* Allocate the memory needed to store the decoder's structure */
+ if( ( p_dec->p_sys = p_sys =
+ (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
+ {
+ msg_Err( p_dec, "out of memory" );
+ return VLC_EGENERIC;
+ }
+
+ p_sys->p_dirac = p_dirac;
+
+ /* Set output properties */
+ p_dec->fmt_out.i_cat = VIDEO_ES;
+ p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
+
+ /* Set callbacks */
+ p_dec->pf_decode_video = DecodeBlock;
+
+ return VLC_SUCCESS;
+}
+
+static void FreeFrameBuffer( dirac_decoder_t *p_dirac )
+{
+ if( p_dirac->fbuf )
+ {
+ int i;
+ for( i = 0; i < 3; i++ )
+ {
+ if( p_dirac->fbuf->buf[i] ) free( p_dirac->fbuf->buf[i] );
+ p_dirac->fbuf->buf[i] = 0;
+ }
+ }
+}
+
+/*****************************************************************************
+ * GetNewPicture: Get a new picture from the vout and copy the decoder output
+ *****************************************************************************/
+static picture_t *GetNewPicture( decoder_t *p_dec )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ picture_t *p_pic;
+ int i_plane;
+
+ p_dec->fmt_out.i_codec =
+ p_sys->p_dirac->seq_params.chroma == format411 ?
+ VLC_FOURCC('I','4','1','1') :
+ p_sys->p_dirac->seq_params.chroma == format420 ?
+ VLC_FOURCC('I','4','2','0') :
+ p_sys->p_dirac->seq_params.chroma == format422 ?
+ VLC_FOURCC('I','4','2','2') : 0;
+
+ p_dec->fmt_out.video.i_visible_width =
+ p_dec->fmt_out.video.i_width = p_sys->p_dirac->seq_params.width;
+ p_dec->fmt_out.video.i_visible_height =
+ p_dec->fmt_out.video.i_height = p_sys->p_dirac->seq_params.height;
+ p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR * 4 / 3;
+
+ p_dec->fmt_out.video.i_frame_rate =
+ p_sys->p_dirac->seq_params.frame_rate.numerator;
+ p_dec->fmt_out.video.i_frame_rate_base =
+ p_sys->p_dirac->seq_params.frame_rate.denominator;
+
+ /* Get a new picture */
+ p_pic = p_dec->pf_vout_buffer_new( p_dec );
+
+ if( p_pic == NULL ) return NULL;
+
+ p_pic->b_progressive = !p_sys->p_dirac->seq_params.interlace;
+ p_pic->b_top_field_first = p_sys->p_dirac->seq_params.topfieldfirst;
+ p_pic->i_nb_fields = 2;
+
+ /* Copy picture stride by stride */
+ for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
+ {
+ int i_line, i_width, i_dst_stride;
+ uint8_t *p_src = p_sys->p_dirac->fbuf->buf[i_plane];
+ uint8_t *p_dst = p_pic->p[i_plane].p_pixels;
+
+ i_width = p_pic->p[i_plane].i_visible_pitch;
+ i_dst_stride = p_pic->p[i_plane].i_pitch;
+
+ for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
+ {
+ p_dec->p_vlc->pf_memcpy( p_dst, p_src, i_width );
+ p_src += i_width;
+ p_dst += i_dst_stride;
+ }
+ }
+
+ return p_pic;
+}
+
+/*****************************************************************************
+ * CloseDecoder: 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;
+
+ FreeFrameBuffer( p_sys->p_dirac );
+ dirac_decoder_close( p_sys->p_dirac );
+ free( p_sys );
+}
+
+/****************************************************************************
+ * DecodeBlock: the whole thing
+ ****************************************************************************
+ * This function must be fed with complete frames.
+ ****************************************************************************/
+static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ dirac_decoder_state_t state;
+ picture_t *p_pic;
+ block_t *p_block;
+
+ if( !pp_block || !*pp_block ) return NULL;
+
+ p_block = *pp_block;
+
+ while( 1 )
+ {
+ state = dirac_parse( p_sys->p_dirac );
+
+ switch( state )
+ {
+ case STATE_BUFFER:
+ if( !p_block->i_buffer )
+ {
+ block_Release( p_block );
+ return NULL;
+ }
+
+ msg_Dbg( p_dec, "STATE_BUFFER" );
+ dirac_buffer( p_sys->p_dirac, p_block->p_buffer,
+ p_block->p_buffer + p_block->i_buffer );
+
+ p_block->i_buffer = 0;
+ break;
+
+ case STATE_SEQUENCE:
+ {
+ /* Initialize video output */
+ uint8_t *buf[3];
+
+ msg_Dbg( p_dec, "%dx%d, chroma %i, %f fps",
+ p_sys->p_dirac->seq_params.width,
+ p_sys->p_dirac->seq_params.height,
+ p_sys->p_dirac->seq_params.chroma,
+ (float)p_sys->p_dirac->seq_params.frame_rate.numerator/
+ p_sys->p_dirac->seq_params.frame_rate.denominator );
+
+ FreeFrameBuffer( p_sys->p_dirac );
+ buf[0] = malloc( p_sys->p_dirac->seq_params.width *
+ p_sys->p_dirac->seq_params.height );
+ buf[1] = malloc( p_sys->p_dirac->seq_params.chroma_width *
+ p_sys->p_dirac->seq_params.chroma_height );
+ buf[2] = malloc( p_sys->p_dirac->seq_params.chroma_width *
+ p_sys->p_dirac->seq_params.chroma_height );
+
+ dirac_set_buf( p_sys->p_dirac, buf, NULL );
+ break;
+ }
+
+ case STATE_SEQUENCE_END:
+ msg_Dbg( p_dec, "SEQUENCE_END" );
+ FreeFrameBuffer( p_sys->p_dirac );
+ break;
+
+ case STATE_PICTURE_START:
+ msg_Dbg( p_dec, "PICTURE_START: frame_type=%i frame_num=%d",
+ p_sys->p_dirac->frame_params.ftype,
+ p_sys->p_dirac->frame_params.fnum );
+ break;
+
+ case STATE_PICTURE_AVAIL:
+ msg_Dbg( p_dec, "PICTURE_AVAI : frame_type=%i frame_num=%d",
+ p_sys->p_dirac->frame_params.ftype,
+ p_sys->p_dirac->frame_params.fnum );
+
+ /* Picture available for display */
+ p_pic = GetNewPicture( p_dec );
+ p_pic->date = p_block->i_pts > 0 ? p_block->i_pts : p_block->i_dts;
+ p_pic->b_force = 1; // HACK
+ return p_pic;
+ break;
+
+ case STATE_INVALID:
+ msg_Dbg( p_dec, "STATE_INVALID" );
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ /* Never reached */
+ return NULL;
+}
+
+/*****************************************************************************
+ * encoder_sys_t : dirac encoder descriptor
+ *****************************************************************************/
+#define ENC_BUFSIZE 1024*1024
+struct encoder_sys_t
+{
+ /*
+ * Dirac properties
+ */
+ dirac_encoder_t *p_dirac;
+ dirac_encoder_context_t ctx;
+
+ uint8_t *p_buffer_in;
+ int i_buffer_in;
+
+ uint8_t p_buffer_out[ENC_BUFSIZE];
+};
+
+/*****************************************************************************
+ * 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 = p_enc->p_sys;
+ vlc_value_t val;
+ float f_quality;
+
+ if( p_enc->fmt_out.i_codec != VLC_FOURCC('d','r','a','c') &&
+ !p_enc->b_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 )
+ {
+ msg_Err( p_enc, "out of memory" );
+ return VLC_EGENERIC;
+ }
+ memset( p_sys, 0, sizeof(encoder_sys_t) );
+ p_enc->p_sys = p_sys;
+
+ p_enc->pf_encode_video = Encode;
+ p_enc->fmt_in.i_codec = VLC_FOURCC('I','4','2','0');
+ p_enc->fmt_in.video.i_bits_per_pixel = 12;
+ p_enc->fmt_out.i_codec = VLC_FOURCC('d','r','a','c');
+
+ sout_CfgParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
+
+ /* Initialse the encoder context with the presets for SD576 - Standard
+ * Definition Digital (some parameters will be overwritten later on) */
+ dirac_encoder_context_init( &p_sys->ctx, SD576 );
+
+ /* Override parameters if required */
+ p_sys->ctx.seq_params.width = p_enc->fmt_in.video.i_width;
+ p_sys->ctx.seq_params.height = p_enc->fmt_in.video.i_height;
+ p_sys->ctx.seq_params.chroma = format420;
+ p_sys->ctx.seq_params.frame_rate.numerator =
+ p_enc->fmt_in.video.i_frame_rate;
+ p_sys->ctx.seq_params.frame_rate.denominator =
+ p_enc->fmt_in.video.i_frame_rate_base;
+ p_sys->ctx.seq_params.interlace = 0;
+ p_sys->ctx.seq_params.topfieldfirst = 0;
+
+ var_Get( p_enc, ENC_CFG_PREFIX "quality", &val );
+ f_quality = val.f_float;
+ if( f_quality > 10 ) f_quality = 10;
+ if( f_quality < 1 ) f_quality = 1;
+ p_sys->ctx.enc_params.qf = f_quality;
+
+ /* Initialise the encoder with the encoder context */
+ p_sys->p_dirac = dirac_encoder_init( &p_sys->ctx, 0 );
+
+ /* Set the buffer size for the encoded picture */
+ p_sys->i_buffer_in = p_enc->fmt_in.video.i_width *
+ p_enc->fmt_in.video.i_height * 3 / 2;
+ p_sys->p_buffer_in = malloc( p_sys->i_buffer_in );
+
+ return VLC_SUCCESS;
+}
+
+/****************************************************************************
+ * Encode: the whole thing
+ ****************************************************************************
+ * This function spits out ogg packets.
+ ****************************************************************************/
+static block_t *Encode( encoder_t *p_enc, picture_t *p_pic )
+{
+ encoder_sys_t *p_sys = p_enc->p_sys;
+ block_t *p_block, *p_chain = NULL;
+ int i_plane, i_line, i_width, i_src_stride;
+ uint8_t *p_dst;
+
+ /* Copy input picture in encoder input buffer (stride by stride) */
+ p_dst = p_sys->p_buffer_in;
+ for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
+ {
+ uint8_t *p_src = p_pic->p[i_plane].p_pixels;
+ i_width = p_pic->p[i_plane].i_visible_pitch;
+ i_src_stride = p_pic->p[i_plane].i_pitch;
+
+ for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ )
+ {
+ p_enc->p_vlc->pf_memcpy( p_dst, p_src, i_width );
+ p_dst += i_width;
+ p_src += i_src_stride;
+ }
+ }
+
+ /* Load one frame of data into encoder */
+ if( dirac_encoder_load( p_sys->p_dirac, p_sys->p_buffer_in,
+ p_sys->i_buffer_in ) >= 0 )
+ {
+ dirac_encoder_state_t state;
+
+ msg_Dbg( p_enc, "dirac_encoder_load" );
+
+ /* Retrieve encoded frames from encoder */
+ do
+ {
+ p_sys->p_dirac->enc_buf.buffer = p_sys->p_buffer_out;
+ p_sys->p_dirac->enc_buf.size = ENC_BUFSIZE;
+ state = dirac_encoder_output( p_sys->p_dirac );
+ msg_Dbg( p_enc, "dirac_encoder_output: %i", state );
+ switch( state )
+ {
+ case ENC_STATE_AVAIL:
+ // Encoded frame available in encoder->enc_buf
+ // Encoded frame params available in enccoder->enc_fparams
+ // Encoded frame stats available in enccoder->enc_fstats
+ p_block = block_New( p_enc, p_sys->p_dirac->enc_buf.size );
+ memcpy( p_block->p_buffer, p_sys->p_dirac->enc_buf.buffer,
+ p_sys->p_dirac->enc_buf.size );
+ p_block->i_dts = p_block->i_pts = p_pic->date;
+ block_ChainAppend( &p_chain, p_block );
+
+ break;
+ case ENC_STATE_BUFFER:
+ break;
+ case ENC_STATE_INVALID:
+ default:
+ break;
+ }
+ if( p_sys->p_dirac->decoded_frame_avail )
+ {
+ //locally decoded frame is available in
+ //encoder->dec_buf
+ //locally decoded frame parameters available
+ //in encoder->dec_fparams
+ }
+ if( p_sys->p_dirac->instr_data_avail )
+ {
+ //Instrumentation data (motion vectors etc.)
+ //available in encoder->instr
+ }
+
+ } while( state == ENC_STATE_AVAIL );
+ }
+ else
+ {
+ msg_Dbg( p_enc, "dirac_encoder_load() error" );
+ }
+
+ return p_chain;
+}
+
+/*****************************************************************************
+ * CloseEncoder: dirac 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;
+
+ msg_Dbg( p_enc, "resulting bit-rate: %i bits/sec",
+ p_sys->p_dirac->enc_seqstats.bit_rate );
+
+ /* Free the encoder resources */
+ dirac_encoder_close( p_sys->p_dirac );
+
+ free( p_sys->p_buffer_in );
+ free( p_sys );
+}
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