/*****************************************************************************
- * mpeg4video.c:
+ * mpeg4video.c: mpeg 4 video packetizer
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
- * $Id: mpeg4video.c,v 1.2 2002/12/18 16:33:09 fenrir Exp $
+ * $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.org>
+ * Gildas Bazin <gbazin@netcourrier.com>
*
* 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
/*****************************************************************************
* Preamble
*****************************************************************************/
+#include <stdlib.h> /* malloc(), free() */
+
#include <vlc/vlc.h>
-#include <vlc/aout.h>
#include <vlc/decoder.h>
-#include <vlc/input.h>
#include <vlc/sout.h>
-#include <stdlib.h> /* malloc(), free() */
-#include <string.h> /* strdup() */
+#include "vlc_bits.h"
/*****************************************************************************
- * Local prototypes
+ * Module descriptor
*****************************************************************************/
-typedef struct packetizer_thread_s
-{
- /* Input properties */
- decoder_fifo_t *p_fifo;
- bit_stream_t bit_stream;
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
- mtime_t i_dts;
+vlc_module_begin();
+ set_description( _("MPEG4 video packetizer") );
+ set_capability( "packetizer", 50 );
+ set_callbacks( Open, Close );
+vlc_module_end();
- /* Output properties */
- sout_input_t *p_sout_input;
- sout_packet_format_t output_format;
+/****************************************************************************
+ * Local prototypes
+ ****************************************************************************/
+static block_t *Packetize( decoder_t *, block_t ** );
- sout_buffer_t *p_vol;
- int i_vop_since_vol;
-} packetizer_thread_t;
+struct decoder_sys_t
+{
+ /*
+ * Common properties
+ */
+ mtime_t i_pts;
+ mtime_t i_dts;
-static int Open ( vlc_object_t * );
-static int Run ( decoder_fifo_t * );
-static int InitThread ( packetizer_thread_t * );
-static void PacketizeThread ( packetizer_thread_t * );
-static void EndThread ( packetizer_thread_t * );
+ vlc_bool_t b_vop;
+ int i_buffer;
+ int i_buffer_size;
+ uint8_t *p_buffer;
+ unsigned int i_flags;
-/*****************************************************************************
- * Module descriptor
- *****************************************************************************/
+ vlc_bool_t b_frame;
+};
-vlc_module_begin();
- set_description( _("MPEG-4 packetizer") );
- set_capability( "packetizer", 50 );
- set_callbacks( Open, NULL );
-vlc_module_end();
+static int m4v_FindStartCode( uint8_t **pp_start, uint8_t *p_end );
+static int m4v_VOLParse( es_format_t *fmt, uint8_t *p_vol, int i_vol );
#define VIDEO_OBJECT_MASK 0x01f
#define VIDEO_OBJECT_LAYER_MASK 0x00f
#define TEXTURE_SNR_LAYER_START_CODE 0x1c0
/*****************************************************************************
- * OpenDecoder: probe the packetizer and return score
- *****************************************************************************
- * Tries to launch a decoder and return score so that the interface is able
- * to choose.
+ * Open: probe the packetizer and return score
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
- decoder_fifo_t *p_fifo = (decoder_fifo_t*) p_this;
+ decoder_t *p_dec = (decoder_t*)p_this;
+ decoder_sys_t *p_sys;
- p_fifo->pf_run = Run;
-
- switch( p_fifo->i_fourcc )
+ switch( p_dec->fmt_in.i_codec )
{
+ case VLC_FOURCC( 'm', '4', 's', '2'):
+ case VLC_FOURCC( 'M', '4', 'S', '2'):
+ case VLC_FOURCC( 'm', 'p', '4', 's'):
+ case VLC_FOURCC( 'M', 'P', '4', 'S'):
case VLC_FOURCC( 'm', 'p', '4', 'v'):
case VLC_FOURCC( 'D', 'I', 'V', 'X'):
case VLC_FOURCC( 'd', 'i', 'v', 'x'):
case VLC_FOURCC( 'X', 'v', 'i', 'D'):
case VLC_FOURCC( 'x', 'v', 'i', 'd'):
case VLC_FOURCC( 'D', 'X', '5', '0'):
- return VLC_SUCCESS;
+ case VLC_FOURCC( 'd', 'x', '5', '0'):
+ case VLC_FOURCC( 0x04, 0, 0, 0):
+ case VLC_FOURCC( '3', 'I', 'V', '2'):
+ case VLC_FOURCC( 'm', '4', 'c', 'c'):
+ case VLC_FOURCC( 'M', '4', 'C', 'C'):
+ break;
+
default:
return VLC_EGENERIC;
}
+
+ /* Allocate the memory needed to store the decoder's structure */
+ if( ( p_dec->p_sys = p_sys = malloc( sizeof(decoder_sys_t) ) ) == NULL )
+ {
+ msg_Err( p_dec, "out of memory" );
+ return VLC_EGENERIC;
+ }
+ p_sys->i_pts = 0;
+ p_sys->i_dts = 0;
+ p_sys->b_vop = VLC_FALSE;
+ p_sys->i_buffer = 0;
+ p_sys->i_buffer_size = 0;
+ p_sys->p_buffer = 0;
+ p_sys->i_flags = 0;
+ p_sys->b_frame = VLC_FALSE;
+
+ /* Setup properties */
+ es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
+ p_dec->fmt_out.i_codec = VLC_FOURCC( 'm', 'p', '4', 'v' );
+
+ if( p_dec->fmt_in.i_extra )
+ {
+ /* We have a vol */
+ p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
+ p_dec->fmt_out.p_extra = malloc( p_dec->fmt_in.i_extra );
+ memcpy( p_dec->fmt_out.p_extra, p_dec->fmt_in.p_extra,
+ p_dec->fmt_in.i_extra );
+
+ msg_Dbg( p_dec, "opening with vol size:%d", p_dec->fmt_in.i_extra );
+ m4v_VOLParse( &p_dec->fmt_out,
+ p_dec->fmt_out.p_extra, p_dec->fmt_out.i_extra );
+ }
+ else
+ {
+ /* No vol, we'll have to look for one later on */
+ p_dec->fmt_out.i_extra = 0;
+ p_dec->fmt_out.p_extra = 0;
+ }
+
+ /* Set callback */
+ p_dec->pf_packetize = Packetize;
+
+ return VLC_SUCCESS;
}
/*****************************************************************************
- * RunDecoder: this function is called just after the thread is created
+ * Close: clean up the packetizer
*****************************************************************************/
-static int Run( decoder_fifo_t *p_fifo )
+static void Close( vlc_object_t *p_this )
{
- packetizer_thread_t *p_pack;
- int b_error;
+ decoder_t *p_dec = (decoder_t*)p_this;
- msg_Info( p_fifo, "Running MPEG-4 packetizer" );
- if( !( p_pack = malloc( sizeof( packetizer_thread_t ) ) ) )
- {
- msg_Err( p_fifo, "out of memory" );
- DecoderError( p_fifo );
- return( -1 );
- }
- memset( p_pack, 0, sizeof( packetizer_thread_t ) );
+ if( p_dec->p_sys->p_buffer ) free( p_dec->p_sys->p_buffer );
+ free( p_dec->p_sys );
+}
- p_pack->p_fifo = p_fifo;
+/****************************************************************************
+ * Packetize: the whole thing
+ ****************************************************************************/
+static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
- if( InitThread( p_pack ) != 0 )
- {
- DecoderError( p_fifo );
- return( -1 );
- }
+ block_t *p_chain_out = NULL;
+ block_t *p_block;
+ uint8_t *p_vol = NULL;
+ uint8_t *p_start;
- while( ( !p_pack->p_fifo->b_die )&&( !p_pack->p_fifo->b_error ) )
+ if( !pp_block || !*pp_block ) return NULL;
+
+ p_block = *pp_block;
+
+ /* Append data */
+ if( p_sys->i_buffer + p_block->i_buffer > p_sys->i_buffer_size )
{
- PacketizeThread( p_pack );
+ p_sys->i_buffer_size += p_block->i_buffer + 1024;
+ p_sys->p_buffer = realloc( p_sys->p_buffer, p_sys->i_buffer_size );
}
+ memcpy( &p_sys->p_buffer[p_sys->i_buffer], p_block->p_buffer,
+ p_block->i_buffer );
+ p_sys->i_buffer += p_block->i_buffer;
-
- if( ( b_error = p_pack->p_fifo->b_error ) )
+ if( p_sys->i_buffer > 10*1000000 )
{
- DecoderError( p_pack->p_fifo );
+ msg_Err( p_dec, "mmh reseting context" );
+ p_sys->i_buffer = 0;
}
- EndThread( p_pack );
- if( b_error )
+ /* Search vop */
+ p_start = &p_sys->p_buffer[p_sys->i_buffer - p_block->i_buffer - 4];
+ if( p_start < p_sys->p_buffer )
{
- return( -1 );
+ p_start = p_sys->p_buffer;
}
+ for( ;; )
+ {
+ if( m4v_FindStartCode( &p_start, &p_sys->p_buffer[p_sys->i_buffer] ) )
+ {
+ block_Release( p_block );
+ *pp_block = NULL;
+ return p_chain_out;
+ }
+ /* fprintf( stderr, "start code=0x1%2.2x\n", p_start[3] ); */
- return( 0 );
-}
+ if( p_vol )
+ {
+ /* Copy the complete VOL */
+ p_dec->fmt_out.i_extra = p_start - p_vol;
+ p_dec->fmt_out.p_extra = malloc( p_dec->fmt_out.i_extra );
+ memcpy( p_dec->fmt_out.p_extra, p_vol, p_dec->fmt_out.i_extra );
+ m4v_VOLParse( &p_dec->fmt_out,
+ p_dec->fmt_out.p_extra, p_dec->fmt_out.i_extra );
+
+ p_vol = NULL;
+ }
+ if( p_sys->b_vop )
+ {
+ /* Output the complete VOP we have */
+ int i_out = p_start - p_sys->p_buffer;
+ block_t *p_out = block_New( p_dec, i_out );
+ /* extract data */
+ memcpy( p_out->p_buffer, p_sys->p_buffer, i_out );
+ if( i_out < p_sys->i_buffer )
+ {
+ memmove( p_sys->p_buffer, &p_sys->p_buffer[i_out],
+ p_sys->i_buffer - i_out );
+ }
+ p_sys->i_buffer -= i_out;
+ p_start -= i_out;
-#define FREE( p ) if( p ) free( p ); p = NULL
+ p_out->i_flags = p_sys->i_flags;
-static int CopyUntilNextStartCode( packetizer_thread_t *p_pack,
- sout_buffer_t *p_sout_buffer,
- int *pi_pos )
-{
- int i_copy = 0;
+ /* FIXME do proper dts/pts */
+ p_out->i_pts = p_sys->i_pts;
+ p_out->i_dts = p_sys->i_dts;
+ /* FIXME doesn't work when there is multiple VOP in one block */
+ if( p_block->i_dts > p_sys->i_dts )
+ {
+ p_out->i_length = p_block->i_dts - p_sys->i_dts;
+ }
- do
- {
- p_sout_buffer->p_buffer[(*pi_pos)++] =
- GetBits( &p_pack->bit_stream, 8 );
- i_copy++;
+ if( p_dec->fmt_out.i_extra > 0 )
+ {
+ block_ChainAppend( &p_chain_out, p_out );
+ }
+ else
+ {
+ msg_Warn( p_dec, "waiting for VOL" );
+ block_Release( p_out );
+ }
- if( *pi_pos + 2048 > p_sout_buffer->i_allocated_size )
- {
- sout_BufferRealloc( p_pack->p_sout_input->p_sout,
- p_sout_buffer,
- p_sout_buffer->i_allocated_size + 50 * 1024);
+#if 0
+ fprintf( stderr, "pts=%lld dts=%lld length=%lldms\n",
+ p_out->i_pts, p_out->i_dts,
+ p_out->i_length / 1000 );
+#endif
+ p_sys->b_vop = VLC_FALSE;
}
- } while( ShowBits( &p_pack->bit_stream, 24 ) != 0x01 &&
- !p_pack->p_fifo->b_die && !p_pack->p_fifo->b_error );
+ if( p_start[3] >= 0x20 && p_start[3] <= 0x2f )
+ {
+ /* Start of the VOL */
+ p_vol = p_start;
+ }
+ else if( p_start[3] == 0xb6 )
+ {
+ p_sys->b_vop = VLC_TRUE;
+ switch( p_start[4] >> 6 )
+ {
+ case 0:
+ p_sys->i_flags = BLOCK_FLAG_TYPE_I;
+ break;
+ case 1:
+ p_sys->i_flags = BLOCK_FLAG_TYPE_P;
+ break;
+ case 2:
+ p_sys->i_flags = BLOCK_FLAG_TYPE_B;
+ p_sys->b_frame = VLC_TRUE;
+ break;
+ case 3: /* gni ? */
+ p_sys->i_flags = BLOCK_FLAG_TYPE_PB;
+ break;
+ }
- return( i_copy );
+ /* The pts information is not available in all the containers.
+ * FIXME: calculate the pts correctly */
+ if( p_block->i_pts > 0 )
+ {
+ p_sys->i_pts = p_block->i_pts;
+ }
+ else if( (p_sys->i_flags&BLOCK_FLAG_TYPE_B) || !p_sys->b_frame )
+ {
+ p_sys->i_pts = p_block->i_dts;
+ }
+ else
+ {
+ p_sys->i_pts = 0;
+ }
+ if( p_block->i_dts > 0 )
+ {
+ p_sys->i_dts = p_block->i_dts;
+ }
+ else if( p_sys->i_dts > 0 )
+ {
+ /* XXX KLUDGE immonde, else transcode won't work */
+ p_sys->i_dts += 1000;
+ }
+ }
+ p_start += 4; /* Next */
+ }
}
-static int sout_BufferAddMem( sout_instance_t *p_sout,
- sout_buffer_t *p_buffer,
- int i_mem,
- uint8_t *p_mem )
+/****************************************************************************
+ * m4v_FindStartCode
+ ****************************************************************************/
+static int m4v_FindStartCode( uint8_t **pp_start, uint8_t *p_end )
{
- if( p_buffer->i_size + i_mem >= p_buffer->i_allocated_size )
+ uint8_t *p = *pp_start;
+
+ /* We wait for 4+1 bytes */
+ for( p = *pp_start; p < p_end - 5; p++ )
{
- sout_BufferRealloc( p_sout,
- p_buffer,
- p_buffer->i_size + i_mem + 1024 );
+ if( p[0] == 0 && p[1] == 0 && p[2] == 1 )
+ {
+ *pp_start = p;
+ return VLC_SUCCESS;
+ }
}
- memcpy( p_buffer->p_buffer + p_buffer->i_size, p_mem, i_mem );
- p_buffer->i_size += i_mem;
- return( i_mem );
+ *pp_start = p_end;
+ return VLC_EGENERIC;
}
-/*****************************************************************************
- * InitThread: initialize data before entering main loop
- *****************************************************************************/
-static int InitThread( packetizer_thread_t *p_pack )
+/* look at ffmpeg av_log2 ;) */
+static int vlc_log2( unsigned int v )
{
- p_pack->i_dts = 0;
- p_pack->p_vol = NULL;
- p_pack->i_vop_since_vol = 0;
- p_pack->output_format.i_cat = VIDEO_ES;
- p_pack->output_format.i_fourcc = VLC_FOURCC( 'm', 'p', '4', 'v' );
-
- if( InitBitstream( &p_pack->bit_stream, p_pack->p_fifo,
- NULL, NULL ) != VLC_SUCCESS )
+ int n = 0;
+ static const int vlc_log2_table[16] =
{
- msg_Err( p_pack->p_fifo, "cannot initialize bitstream" );
- return -1;
- }
+ 0,0,1,1,2,2,2,2, 3,3,3,3,3,3,3,3
+ };
- p_pack->p_sout_input =
- sout_InputNew( p_pack->p_fifo,
- &p_pack->output_format );
-
- if( !p_pack->p_sout_input )
+ if( v&0xffff0000 )
+ {
+ v >>= 16;
+ n += 16;
+ }
+ if( v&0xff00 )
+ {
+ v >>= 8;
+ n += 8;
+ }
+ if( v&0xf0 )
{
- msg_Err( p_pack->p_fifo,
- "cannot add a new stream" );
- return( -1 );
+ v >>= 4;
+ n += 4;
}
+ n += vlc_log2_table[v];
- return( 0 );
+ return n;
}
-/*****************************************************************************
- * PacketizeThread: packetize an unit (here copy a complete pes)
- *****************************************************************************/
-static void PacketizeThread( packetizer_thread_t *p_pack )
+/* m4v_VOLParse:
+ * TODO:
+ * - support aspect ratio
+ */
+static int m4v_VOLParse( es_format_t *fmt, uint8_t *p_vol, int i_vol )
{
- sout_instance_t *p_sout = p_pack->p_sout_input->p_sout;
- sout_buffer_t *p_frame;
-
- uint32_t i_startcode;
-
- /* Idea: Copy until a vop has been found
- * Once a videoobject & videoobjectlayer has been found we save it
- */
-
- p_frame = sout_BufferNew( p_sout, 20*1024 ); // FIXME
- p_frame->i_size = 0;
+ bs_t s;
+ int i_vo_type;
+ int i_vo_ver_id;
+ int i_ar;
+ int i_shape;
+ int i_time_increment_resolution;
for( ;; )
{
- while( ( ( i_startcode = ShowBits( &p_pack->bit_stream, 32 ) )&0xffffff00 ) != 0x00000100 )
- {
- RemoveBits( &p_pack->bit_stream, 8 );
- }
-
- if( i_startcode == VISUAL_OBJECT_SEQUENCE_START_CODE )
+ if( p_vol[0] == 0x00 && p_vol[1] == 0x00 &&
+ p_vol[2] == 0x01 &&
+ p_vol[3] >= 0x20 && p_vol[3] <= 0x2f )
{
- msg_Dbg( p_pack->p_fifo, "<visuel_object_sequence>" );
- RemoveBits32( &p_pack->bit_stream );
+ break;
}
- else if( i_startcode == VISUAL_OBJECT_SEQUENCE_END_CODE )
+ p_vol++;
+ i_vol--;
+ if( i_vol <= 4 )
{
- msg_Dbg( p_pack->p_fifo, "</visuel_object_sequence>" );
- RemoveBits32( &p_pack->bit_stream );
+ return VLC_EGENERIC;
}
- else
- {
- msg_Dbg( p_pack->p_fifo, "start code:0x%8.8x", i_startcode );
+ }
- if( ( i_startcode & ~VIDEO_OBJECT_MASK ) == VIDEO_OBJECT_START_CODE )
- {
- msg_Dbg( p_pack->p_fifo, "<video_object>" );
- CopyUntilNextStartCode( p_pack, p_frame, &p_frame->i_size );
- }
- else if( ( i_startcode & ~VIDEO_OBJECT_LAYER_MASK ) == VIDEO_OBJECT_LAYER_START_CODE )
- {
- /* first: save it */
- if( p_pack->p_vol == NULL )
- {
- p_pack->p_vol = sout_BufferNew( p_sout, 1024 );
- }
- p_pack->p_vol->i_size = 0;
- CopyUntilNextStartCode( p_pack, p_pack->p_vol, &p_pack->p_vol->i_size );
- p_pack->i_vop_since_vol = 0;
-
- /* then: add it to p_frame */
- sout_BufferAddMem( p_sout, p_frame,
- p_pack->p_vol->i_size,
- p_pack->p_vol->p_buffer );
- }
- else if( i_startcode == GROUP_OF_VOP_START_CODE )
- {
- msg_Dbg( p_pack->p_fifo, "<group_of_vop>" );
-#if 0
- if( p_pack->p_vol && p_pack->i_vop_since_vol > 100 ) // FIXME
- {
- sout_BufferAddMem( p_sout, p_frame,
- p_pack->p_vol->i_size,
- p_pack->p_vol->p_buffer );
- p_pack->i_vop_since_vol = 0;
- }
-#endif
- CopyUntilNextStartCode( p_pack, p_frame, &p_frame->i_size );
- }
- else if( i_startcode == VOP_START_CODE )
- {
- msg_Dbg( p_pack->p_fifo, "<vop>" );
-#if 1
- if( p_pack->p_vol && p_pack->i_vop_since_vol > 30 ) // FIXME
- {
- sout_BufferAddMem( p_sout, p_frame,
- p_pack->p_vol->i_size,
- p_pack->p_vol->p_buffer );
- p_pack->i_vop_since_vol = 0;
- }
-#endif
- CopyUntilNextStartCode( p_pack, p_frame, &p_frame->i_size );
- p_pack->i_vop_since_vol++;
- break;
- }
- else
- {
- msg_Dbg( p_pack->p_fifo, "unknown start code" );
- CopyUntilNextStartCode( p_pack, p_frame, &p_frame->i_size );
- }
+ /* parse the vol */
+ bs_init( &s, &p_vol[4], i_vol - 4 );
- }
+ bs_skip( &s, 1 ); /* random access */
+ i_vo_type = bs_read( &s, 8 );
+ if( bs_read1( &s ) )
+ {
+ i_vo_ver_id = bs_read( &s, 4 );
+ bs_skip( &s, 3 );
}
+ else
+ {
+ i_vo_ver_id = 1;
+ }
+ i_ar = bs_read( &s, 4 );
+ if( i_ar == 0xf )
+ {
+ int i_ar_width, i_ar_height;
- p_frame->i_length = 1000000 / 25;
- p_frame->i_bitrate= 0;
- p_frame->i_dts = p_pack->i_dts;
- p_frame->i_pts = p_pack->i_dts;
+ i_ar_width = bs_read( &s, 8 );
+ i_ar_height= bs_read( &s, 8 );
+ }
+ if( bs_read1( &s ) )
+ {
+ int i_chroma_format;
+ int i_low_delay;
- p_pack->i_dts += 1000000 / 25;
- sout_InputSendBuffer( p_pack->p_sout_input, p_frame );
-}
+ /* vol control parameter */
+ i_chroma_format = bs_read( &s, 2 );
+ i_low_delay = bs_read1( &s );
+
+ if( bs_read1( &s ) )
+ {
+ bs_skip( &s, 16 );
+ bs_skip( &s, 16 );
+ bs_skip( &s, 16 );
+ bs_skip( &s, 3 );
+ bs_skip( &s, 11 );
+ bs_skip( &s, 1 );
+ bs_skip( &s, 16 );
+ }
+ }
+ /* shape 0->RECT, 1->BIN, 2->BIN_ONLY, 3->GRAY */
+ i_shape = bs_read( &s, 2 );
+ if( i_shape == 3 && i_vo_ver_id != 1 )
+ {
+ bs_skip( &s, 4 );
+ }
+ if( !bs_read1( &s ) )
+ {
+ /* marker */
+ return VLC_EGENERIC;
+ }
+ i_time_increment_resolution = bs_read( &s, 16 );
+ if( !bs_read1( &s ) )
+ {
+ /* marker */
+ return VLC_EGENERIC;
+ }
-/*****************************************************************************
- * EndThread : packetizer thread destruction
- *****************************************************************************/
-static void EndThread ( packetizer_thread_t *p_pack)
-{
- if( p_pack->p_sout_input )
+ if( bs_read1( &s ) )
{
- sout_InputDelete( p_pack->p_sout_input );
+ int i_time_increment_bits = vlc_log2( i_time_increment_resolution - 1 ) + 1;
+ if( i_time_increment_bits < 1 )
+ {
+ i_time_increment_bits = 1;
+ }
+ bs_skip( &s, i_time_increment_bits );
}
+ if( i_shape == 0 )
+ {
+ bs_skip( &s, 1 );
+ fmt->video.i_width = bs_read( &s, 13 );
+ bs_skip( &s, 1 );
+ fmt->video.i_height= bs_read( &s, 13 );
+ bs_skip( &s, 1 );
+ }
+ return VLC_SUCCESS;
}
+
+
projects / vlc / blobdiff