--- /dev/null
+/*****************************************************************************
+ * vc1.c
+ *****************************************************************************
+ * Copyright (C) 2001, 2002, 2006 the VideoLAN team
+ * $Id: copy.c 18231 2006-12-03 17:02:02Z courmisch $
+ *
+ * Authors: Laurent Aimar <fenrir@via.ecp.fr>
+ * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <stdlib.h> /* malloc(), free() */
+
+#include <vlc/vlc.h>
+#include <vlc_codec.h>
+#include <vlc_block.h>
+
+#include "vlc_bits.h"
+#include "vlc_block_helper.h"
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
+
+vlc_module_begin();
+ set_category( CAT_SOUT );
+ set_subcategory( SUBCAT_SOUT_PACKETIZER );
+ set_description( _("VC-1 packetizer") );
+ set_capability( "packetizer", 50 );
+ set_callbacks( Open, Close );
+vlc_module_end();
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+struct decoder_sys_t
+{
+ /*
+ * Input properties
+ */
+ block_bytestream_t bytestream;
+ int i_state;
+ int i_offset;
+ uint8_t p_startcode[3];
+
+ /* Current sequence header */
+ vlc_bool_t b_sequence_header;
+ struct
+ {
+ block_t *p_sh;
+ vlc_bool_t b_advanced_profile;
+ vlc_bool_t b_interlaced;
+ vlc_bool_t b_frame_interpolation;
+ vlc_bool_t b_range_reduction;
+ vlc_bool_t b_has_bframe;
+ } sh;
+ vlc_bool_t b_entry_point;
+ struct
+ {
+ block_t *p_ep;
+ } ep;
+
+ /* */
+ vlc_bool_t b_frame;
+
+ /* Current frame being built */
+ block_t *p_frame;
+ block_t **pp_last;
+
+
+ mtime_t i_interpolated_dts;
+};
+
+enum
+{
+ STATE_NOSYNC,
+ STATE_NEXT_SYNC
+};
+
+typedef enum
+{
+ IDU_TYPE_SEQUENCE_HEADER = 0x0f,
+ IDU_TYPE_ENTRY_POINT = 0x0e,
+ IDU_TYPE_FRAME = 0x0D,
+ IDU_TYPE_FIELD = 0x0C,
+ IDU_TYPE_SLICE = 0x0B,
+ IDU_TYPE_END_OF_SEQUENCE = 0x0B,
+
+ IDU_TYPE_SEQUENCE_LEVEL_USER_DATA = 0x1F,
+ IDU_TYPE_ENTRY_POINT_USER_DATA = 0x1E,
+ IDU_TYPE_FRAME_USER_DATA = 0x1D,
+ IDU_TYPE_FIELD_USER_DATA = 0x1C,
+ IDU_TYPE_SLICE_USER_DATA = 0x1B,
+} idu_type_t;
+
+static block_t *Packetize( decoder_t *p_dec, block_t **pp_block );
+
+/*****************************************************************************
+ * Open: probe the packetizer and return score
+ *****************************************************************************
+ * Tries to launch a decoder and return score so that the interface is able
+ * to choose.
+ *****************************************************************************/
+static int Open( vlc_object_t *p_this )
+{
+ decoder_t *p_dec = (decoder_t*)p_this;
+ decoder_sys_t *p_sys;
+
+ if( p_dec->fmt_in.i_codec != VLC_FOURCC( 'W', 'V', 'C', '1' ) )
+ return VLC_EGENERIC;
+
+ p_dec->pf_packetize = Packetize;
+
+ /* Create the output format */
+ es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
+ p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
+
+ p_sys->i_state = STATE_NOSYNC;
+ p_sys->bytestream = block_BytestreamInit( p_dec );
+ p_sys->p_startcode[0] = 0x00;
+ p_sys->p_startcode[1] = 0x00;
+ p_sys->p_startcode[2] = 0x01;
+ p_sys->i_offset = 0;
+
+ p_sys->b_sequence_header = VLC_FALSE;
+ p_sys->sh.p_sh = NULL;
+ p_sys->b_entry_point = VLC_FALSE;
+ p_sys->ep.p_ep = NULL;
+
+ p_sys->b_frame = VLC_FALSE;
+ p_sys->p_frame = NULL;
+ p_sys->pp_last = &p_sys->p_frame;
+
+ p_sys->i_interpolated_dts = -1;
+
+
+ if( p_dec->fmt_in.i_extra > 0 )
+ {
+ block_t *p_init = block_New( p_dec, p_dec->fmt_in.i_extra );
+ block_t *p_pic;
+
+ memcpy( p_init->p_buffer, p_dec->fmt_in.p_extra,
+ p_dec->fmt_in.i_extra );
+
+ while( ( p_pic = Packetize( p_dec, &p_init ) ) )
+ block_Release( p_pic ); /* Should not happen (only sequence header) */
+ }
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Close:
+ *****************************************************************************/
+static void Close( vlc_object_t *p_this )
+{
+ decoder_t *p_dec = (decoder_t*)p_this;
+ decoder_sys_t *p_sys = p_dec->p_sys;
+
+ block_BytestreamRelease( &p_sys->bytestream );
+ if( p_sys->p_frame )
+ block_Release( p_sys->p_frame );
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * Packetize: packetize an access unit
+ *****************************************************************************/
+static block_t *ParseIDU( decoder_t *p_dec, block_t *p_frag );
+
+static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ block_t *p_pic;
+
+ if( pp_block == NULL || *pp_block == NULL )
+ return NULL;
+
+ if( (*pp_block)->i_flags & BLOCK_FLAG_DISCONTINUITY )
+ {
+ block_Release( *pp_block );
+ return NULL;
+ }
+ if( (*pp_block)->i_flags & BLOCK_FLAG_CORRUPTED )
+ {
+ p_sys->i_state = STATE_NOSYNC;
+ if( p_sys->p_frame )
+ block_ChainRelease( p_sys->p_frame );
+ p_sys->p_frame = NULL;
+ p_sys->pp_last = &p_sys->p_frame;
+ block_Release( *pp_block );
+ return NULL;
+ }
+
+ block_BytestreamPush( &p_sys->bytestream, *pp_block );
+
+ for( ;; )
+ {
+ switch( p_sys->i_state )
+ {
+
+ case STATE_NOSYNC:
+ if( block_FindStartcodeFromOffset( &p_sys->bytestream, &p_sys->i_offset, p_sys->p_startcode, 3 ) == VLC_SUCCESS )
+ p_sys->i_state = STATE_NEXT_SYNC;
+
+ if( p_sys->i_offset )
+ {
+ block_SkipBytes( &p_sys->bytestream, p_sys->i_offset );
+ p_sys->i_offset = 0;
+ block_BytestreamFlush( &p_sys->bytestream );
+ }
+
+ if( p_sys->i_state != STATE_NEXT_SYNC )
+ return NULL; /* Need more data */
+
+ p_sys->i_offset = 4; /* To find next startcode */
+
+ case STATE_NEXT_SYNC:
+ /* TODO: If p_block == NULL, flush the buffer without checking the
+ * next sync word */
+
+ /* Find the next startcode */
+ if( block_FindStartcodeFromOffset( &p_sys->bytestream, &p_sys->i_offset, p_sys->p_startcode, 3 ) != VLC_SUCCESS )
+ return NULL; /* Need more data */
+
+ /* Get the new fragment and set the pts/dts */
+ p_pic = block_New( p_dec, p_sys->i_offset );
+ block_BytestreamFlush( &p_sys->bytestream );
+ p_pic->i_pts = p_sys->bytestream.p_block->i_pts;
+ p_pic->i_dts = p_sys->bytestream.p_block->i_dts;
+ p_pic->i_rate = p_sys->bytestream.p_block->i_rate;
+
+ block_GetBytes( &p_sys->bytestream, p_pic->p_buffer, p_pic->i_buffer );
+
+ p_sys->i_offset = 0;
+
+ /* Parse and return complete frame */
+ p_pic = ParseIDU( p_dec, p_pic );
+
+ /* Don't reuse the same timestamps several times */
+ if( p_sys->p_frame &&
+ p_sys->p_frame->i_dts == p_sys->bytestream.p_block->i_dts &&
+ p_sys->p_frame->i_pts == p_sys->bytestream.p_block->i_pts )
+ {
+ p_sys->bytestream.p_block->i_pts = -1;
+ p_sys->bytestream.p_block->i_dts = -1;
+ }
+
+ /* */
+ if( !p_pic )
+ {
+ p_sys->i_state = STATE_NOSYNC;
+ break;
+ }
+ /* */
+ if( p_sys->i_interpolated_dts < 0 )
+ {
+ msg_Dbg( p_dec, "need a starting pts/dts" );
+ p_sys->i_state = STATE_NOSYNC;
+ block_Release( p_pic );
+ break;
+ }
+
+ /* So p_block doesn't get re-added several times */
+ *pp_block = block_BytestreamPop( &p_sys->bytestream );
+
+ p_sys->i_state = STATE_NOSYNC;
+
+ return p_pic;
+ }
+ }
+}
+
+/* DecodeRIDU: decode the startcode emulation prevention (same than h264) */
+static void DecodeRIDU( uint8_t *p_ret, int *pi_ret, uint8_t *src, int i_src )
+{
+ uint8_t *end = &src[i_src];
+ uint8_t *dst_end = &p_ret[*pi_ret];
+ uint8_t *dst = p_ret;
+
+ while( src < end && dst < dst_end )
+ {
+ if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
+ src[2] == 0x03 )
+ {
+ *dst++ = 0x00;
+ *dst++ = 0x00;
+
+ src += 3;
+ continue;
+ }
+ *dst++ = *src++;
+ }
+
+ *pi_ret = dst - p_ret;
+}
+/* BuildExtraData: gather sequence header and entry point */
+static void BuildExtraData( decoder_t *p_dec )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ es_format_t *p_es = &p_dec->fmt_out;
+ int i_extra;
+ if( !p_sys->b_sequence_header || !p_sys->b_entry_point )
+ return;
+
+ i_extra = p_sys->sh.p_sh->i_buffer + p_sys->ep.p_ep->i_buffer;
+ if( p_es->i_extra != i_extra )
+ {
+ p_es->i_extra = i_extra;
+ p_es->p_extra = realloc( p_dec->fmt_out.p_extra, p_es->i_extra );
+ }
+ memcpy( p_es->p_extra,
+ p_sys->sh.p_sh->p_buffer, p_sys->sh.p_sh->i_buffer );
+ memcpy( (uint8_t*)p_es->p_extra + p_sys->sh.p_sh->i_buffer,
+ p_sys->ep.p_ep->p_buffer, p_sys->ep.p_ep->i_buffer );
+}
+/* ParseIDU: parse an Independant Decoding Unit */
+static block_t *ParseIDU( decoder_t *p_dec, block_t *p_frag )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ block_t *p_pic;
+ const idu_type_t idu = p_frag->p_buffer[3];
+
+ if( !p_sys->b_sequence_header && idu != IDU_TYPE_SEQUENCE_HEADER )
+ {
+ msg_Warn( p_dec, "waiting for sequence header" );
+ block_Release( p_frag );
+ return NULL;
+ }
+ if( p_sys->b_sequence_header && !p_sys->b_entry_point && idu != IDU_TYPE_ENTRY_POINT )
+ {
+ msg_Warn( p_dec, "waiting for entry point" );
+ block_Release( p_frag );
+ return NULL;
+ }
+ /* TODO we do not gather ENTRY_POINT and SEQUENCE_DATA user data
+ * But It should not be a problem for decoder */
+
+ /* Do we have completed a frame */
+ p_pic = NULL;
+ if( p_sys->b_frame &&
+ idu != IDU_TYPE_FRAME_USER_DATA &&
+ idu != IDU_TYPE_FIELD && idu != IDU_TYPE_FIELD_USER_DATA &&
+ idu != IDU_TYPE_SLICE && idu != IDU_TYPE_SLICE_USER_DATA &&
+ idu != IDU_TYPE_END_OF_SEQUENCE )
+ {
+ /* */
+ p_pic = block_ChainGather( p_sys->p_frame );
+
+ /* We can interpolate dts/pts only if we have a frame rate */
+ if( p_dec->fmt_out.video.i_frame_rate != 0 && p_dec->fmt_out.video.i_frame_rate_base != 0 )
+ {
+ //msg_Dbg( p_dec, "-------------- XXX0 dts="I64Fd" pts="I64Fd" interpolated="I64Fd, p_pic->i_dts, p_pic->i_pts, p_sys->i_interpolated_dts );
+ if( p_pic->i_dts <= 0 )
+ p_pic->i_dts = p_sys->i_interpolated_dts;
+
+ p_sys->i_interpolated_dts += I64C(1000000) * p_dec->fmt_out.video.i_frame_rate_base / p_dec->fmt_out.video.i_frame_rate;
+ if( p_pic->i_pts <= 0 )
+ {
+ if( !p_sys->sh.b_has_bframe || (p_pic->i_flags & BLOCK_FLAG_TYPE_B ) )
+ p_pic->i_pts = p_pic->i_dts;
+ /* TODO compute pts for other case */
+ }
+ }
+ p_sys->i_interpolated_dts = p_pic->i_dts;
+
+ //msg_Dbg( p_dec, "-------------- dts="I64Fd" pts="I64Fd, p_pic->i_dts, p_pic->i_pts );
+
+ /* Reset context */
+ p_sys->p_frame = NULL;
+ p_sys->pp_last = &p_sys->p_frame;
+ }
+
+ /* */
+ if( p_sys->p_frame )
+ {
+ block_t *p_frame = p_sys->p_frame;
+ if( p_frame->i_dts < 0 )
+ p_frame->i_dts = p_frag->i_dts;
+ if( p_frame->i_pts < 0 )
+ p_frame->i_pts = p_frag->i_pts;
+ }
+ block_ChainLastAppend( &p_sys->pp_last, p_frag );
+
+ /* Parse IDU */
+ if( idu == IDU_TYPE_SEQUENCE_HEADER )
+ {
+ es_format_t *p_es = &p_dec->fmt_out;
+ bs_t s;
+ int i_profile;
+ uint8_t ridu[32];
+ int i_ridu = sizeof(ridu);
+
+ /* */
+ if( p_sys->sh.p_sh )
+ block_Release( p_sys->sh.p_sh );
+ p_sys->sh.p_sh = block_Duplicate( p_frag );
+
+ /* Extract the raw IDU */
+ DecodeRIDU( ridu, &i_ridu, &p_frag->p_buffer[4], p_frag->i_buffer - 4 );
+
+ /* Auto detect VC-1_SPMP_PESpacket_PayloadFormatHeader (SMPTE RP 227) for simple/main profile
+ * TODO find a test case and valid it */
+ if( i_ridu > 4 && (ridu[0]&0x80) == 0 ) /* for advanced profile, the first bit is 1 */
+ {
+ video_format_t *p_v = &p_dec->fmt_in.video;
+ const int i_potential_width = GetWBE( &ridu[0] );
+ const int i_potential_height = GetWBE( &ridu[2] );
+
+ if( i_potential_width >= 2 && i_potential_width <= 8192 &&
+ i_potential_height >= 2 && i_potential_height <= 8192 )
+ {
+ if( ( p_v->i_width <= 0 && p_v->i_height <= 0 ) ||
+ ( p_v->i_width == i_potential_width && p_v->i_height == i_potential_height ) )
+ {
+ static const uint8_t startcode[4] = { 0x00, 0x00, 0x01, IDU_TYPE_SEQUENCE_HEADER };
+ p_es->video.i_width = i_potential_width;
+ p_es->video.i_height = i_potential_height;
+
+ /* Remove it */
+ p_frag->p_buffer += 4;
+ p_frag->i_buffer -= 4;
+ memcpy( p_frag->p_buffer, startcode, sizeof(startcode) );
+ }
+ }
+ }
+
+ /* Parse it */
+ bs_init( &s, ridu, i_ridu );
+ i_profile = bs_read( &s, 2 );
+ if( i_profile == 3 )
+ {
+ const int i_level = bs_read( &s, 3 );
+
+ /* Advanced profile */
+ p_sys->sh.b_advanced_profile = VLC_TRUE;
+ p_sys->sh.b_range_reduction = VLC_FALSE;
+ p_sys->sh.b_has_bframe = VLC_TRUE;
+
+ bs_skip( &s, 2+3+5+1 ); // chroma format + frame rate Q + bit rate Q + postprocflag
+
+ p_es->video.i_width = 2*bs_read( &s, 12 )+2;
+ p_es->video.i_height = 2*bs_read( &s, 12 )+2;
+
+ if( !p_sys->b_sequence_header )
+ msg_Dbg( p_dec, "found sequence header for advanced profile level L%d resolution %dx%d",
+ i_level, p_es->video.i_width, p_es->video.i_height);
+
+ bs_skip( &s, 1 );// pulldown
+ p_sys->sh.b_interlaced = bs_read( &s, 1 );
+ bs_skip( &s, 1 );// frame counter
+ p_sys->sh.b_frame_interpolation = bs_read( &s, 1 );
+ bs_skip( &s, 1 ); // Reserved
+ bs_skip( &s, 1 ); // Psf
+
+ if( bs_read( &s, 1 ) ) /* Display extension */
+ {
+ const int i_display_width = bs_read( &s, 14 )+1;
+ const int i_display_height = bs_read( &s, 14 )+1;
+
+ p_es->video.i_aspect = VOUT_ASPECT_FACTOR * i_display_width / i_display_height;
+
+ if( !p_sys->b_sequence_header )
+ msg_Dbg( p_dec, "display size %dx%d", i_display_width, i_display_height );
+
+ if( bs_read( &s, 1 ) ) /* Pixel aspect ratio (PAR/SAR) */
+ {
+ static const int p_ar[16][2] = {
+ { 0, 0}, { 1, 1}, {12,11}, {10,11}, {16,11}, {40,33},
+ {24,11}, {20,11}, {32,11}, {80,33}, {18,11}, {15,11},
+ {64,33}, {160,99},{ 0, 0}, { 0, 0}
+ };
+ int i_ar = bs_read( &s, 4 );
+ int i_ar_w, i_ar_h;
+
+ if( i_ar == 15 )
+ {
+ i_ar_w = bs_read( &s, 8 );
+ i_ar_h = bs_read( &s, 8 );
+ }
+ else
+ {
+ i_ar_w = p_ar[i_ar][0];
+ i_ar_h = p_ar[i_ar][1];
+ }
+ vlc_ureduce( &i_ar_w, &i_ar_h, i_ar_w, i_ar_h, 0 );
+ if( !p_sys->b_sequence_header )
+ msg_Dbg( p_dec, "aspect ratio %d:%d", i_ar_w, i_ar_h );
+ }
+ }
+ if( bs_read( &s, 1 ) ) /* Frame rate */
+ {
+ int i_fps_num = 0;
+ int i_fps_den = 0;
+ if( bs_read( &s, 1 ) )
+ {
+ i_fps_num = bs_read( &s, 16 )+1;
+ i_fps_den = 32;
+ }
+ else
+ {
+ const int i_nr = bs_read( &s, 8 );
+ const int i_dn = bs_read( &s, 4 );
+
+ switch( i_nr )
+ {
+ case 1: i_fps_num = 24000; break;
+ case 2: i_fps_num = 25000; break;
+ case 3: i_fps_num = 30000; break;
+ case 4: i_fps_num = 50000; break;
+ case 5: i_fps_num = 60000; break;
+ case 6: i_fps_num = 48000; break;
+ case 7: i_fps_num = 72000; break;
+ }
+ switch( i_dn )
+ {
+ case 1: i_fps_den = 1000; break;
+ case 2: i_fps_den = 1001; break;
+ }
+ }
+ if( i_fps_num != 0 && i_fps_den != 0 )
+ vlc_ureduce( &p_es->video.i_frame_rate, &p_es->video.i_frame_rate_base, i_fps_num, i_fps_den, 0 );
+
+ if( !p_sys->b_sequence_header )
+ msg_Dbg( p_dec, "frame rate %d/%d", p_es->video.i_frame_rate, p_es->video.i_frame_rate_base );
+ }
+ }
+ else
+ {
+ /* Simple and main profile */
+ p_sys->sh.b_advanced_profile = VLC_FALSE;
+ p_sys->sh.b_interlaced = VLC_FALSE;
+
+ if( !p_sys->b_sequence_header )
+ msg_Dbg( p_dec, "found sequence header for %s profile", i_profile == 0 ? "simple" : "main" );
+
+ bs_skip( &s, 2+3+5+1+1+ // reserved + frame rate Q + bit rate Q + loop filter + reserved
+ 1+1+1+1+2+ // multiresolution + reserved + fast uv mc + extended mv + dquant
+ 1+1+1+1 ); // variable size transform + reserved + overlap + sync marker
+ p_sys->sh.b_range_reduction = bs_read( &s, 1 );
+ if( bs_read( &s, 3 ) > 0 )
+ p_sys->sh.b_has_bframe = VLC_TRUE;
+ else
+ p_sys->sh.b_has_bframe = VLC_FALSE;
+ bs_skip( &s, 2 ); // quantizer
+
+ p_sys->sh.b_frame_interpolation = bs_read( &s, 1 );
+ }
+ p_sys->b_sequence_header = VLC_TRUE;
+ BuildExtraData( p_dec );
+ }
+ else if( idu == IDU_TYPE_ENTRY_POINT )
+ {
+ if( p_sys->ep.p_ep )
+ block_Release( p_sys->ep.p_ep );
+ p_sys->ep.p_ep = block_Duplicate( p_frag );
+
+ p_sys->b_entry_point = VLC_TRUE;
+ BuildExtraData( p_dec );
+ }
+ else if( idu == IDU_TYPE_FRAME )
+ {
+ bs_t s;
+ uint8_t ridu[8];
+ int i_ridu = sizeof(ridu);
+
+ /* Extract the raw IDU */
+ DecodeRIDU( ridu, &i_ridu, &p_frag->p_buffer[4], p_frag->i_buffer - 4 );
+
+ /* Parse it + interpolate pts/dts if possible */
+ bs_init( &s, ridu, i_ridu );
+
+ if( p_sys->sh.b_advanced_profile )
+ {
+ int i_fcm = 0;
+
+ if( p_sys->sh.b_interlaced )
+ {
+ if( bs_read( &s, 1 ) )
+ {
+ if( bs_read( &s, 1 ) )
+ i_fcm = 1; /* interlaced field */
+ else
+ i_fcm = 2; /* interlaced frame */
+ }
+ }
+
+ if( i_fcm == 1 ) /*interlaced field */
+ {
+ /* XXX for mixed I/P we should check reference usage before marking them I (too much work) */
+ switch( bs_read( &s, 3 ) )
+ {
+ case 0: /* II */
+ case 1: /* IP */
+ case 2: /* PI */
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
+ break;
+ case 3: /* PP */
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P;
+ break;
+ case 4: /* BB */
+ case 5: /* BBi */
+ case 6: /* BiB */
+ case 7: /* BiBi */
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B;
+ break;
+ }
+ }
+ else
+ {
+ if( !bs_read( &s, 1 ) )
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P;
+ else if( !bs_read( &s, 1 ) )
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B;
+ else if( !bs_read( &s, 1 ) )
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
+ else if( !bs_read( &s, 1 ) )
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B; /* Bi */
+ else
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P; /* P Skip */
+ }
+ }
+ else
+ {
+ if( p_sys->sh.b_frame_interpolation )
+ bs_skip( &s, 1 ); // interpolate
+ bs_skip( &s, 2 ); // frame count
+ if( p_sys->sh.b_range_reduction )
+ bs_skip( &s, 1 ); // range reduction
+
+ if( bs_read( &s, 1 ) )
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_P;
+ else if( !p_sys->sh.b_has_bframe || bs_read( &s, 1 ) )
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
+ else
+ p_sys->p_frame->i_flags |= BLOCK_FLAG_TYPE_B;
+ }
+ p_sys->b_frame = VLC_TRUE;
+ }
+ return p_pic;
+}
+
projects / vlc / commitdiff