* mpegvideo.c
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
- * $Id: mpegvideo.c,v 1.21 2003/11/21 15:32:08 fenrir Exp $
+ * $Id: mpegvideo.c,v 1.22 2003/11/22 16:53:02 fenrir Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.org>
/*****************************************************************************
* Preamble
*****************************************************************************/
+#include <stdlib.h> /* malloc(), free() */
+
#include <vlc/vlc.h>
#include <vlc/decoder.h>
#include <vlc/input.h>
-#include <vlc/sout.h>
-#include "codecs.h" /* WAVEFORMATEX BITMAPINFOHEADER */
-
-#include <stdlib.h> /* malloc(), free() */
-#include <string.h> /* strdup() */
-
-/*****************************************************************************
- * Local prototypes
- *****************************************************************************/
-typedef struct packetizer_s
-{
- /* Input properties */
- decoder_fifo_t *p_fifo;
- bit_stream_t bit_stream;
-
- /* Output properties */
- sout_packetizer_input_t *p_sout_input;
- es_format_t output_format;
-
- mtime_t i_interpolated_dts;
- mtime_t i_old_duration;
- mtime_t i_last_ref_pts;
- double d_frame_rate;
- int i_progressive_sequence;
- int i_low_delay;
- uint8_t p_sequence_header[150];
- int i_sequence_header_length;
- int i_last_sequence_header;
- vlc_bool_t b_expect_discontinuity;
-
-} packetizer_t;
-
-static int Open ( vlc_object_t * );
-static int Run ( decoder_fifo_t * );
-
-static int InitThread ( packetizer_t * );
-static void PacketizeThread ( packetizer_t * );
-static void EndThread ( packetizer_t * );
-static void BitstreamCallback ( bit_stream_t *, vlc_bool_t );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
vlc_module_begin();
set_description( _("MPEG-I/II video packetizer") );
set_capability( "packetizer", 50 );
- set_callbacks( Open, NULL );
+ set_callbacks( Open, Close );
vlc_module_end();
+
/*****************************************************************************
- * OpenDecoder: probe the packetizer and return score
- *****************************************************************************
- * Tries to launch a decoder and return score so that the interface is able
- * to choose.
+ * Local prototypes
*****************************************************************************/
-static int Open( vlc_object_t *p_this )
-{
- decoder_t *p_dec = (decoder_t*)p_this;
+static block_t *Packetize( decoder_t *, block_t ** );
- if( p_dec->p_fifo->i_fourcc != VLC_FOURCC( 'm', 'p', 'g', 'v') &&
- p_dec->p_fifo->i_fourcc != VLC_FOURCC( 'm', 'p', 'g', '1') &&
- p_dec->p_fifo->i_fourcc != VLC_FOURCC( 'm', 'p', 'g', '2') )
- {
- return VLC_EGENERIC;
- }
+static int mpgv_FindStartCode( uint8_t **pp_start, uint8_t *p_end );
- p_dec->pf_run = Run;
- return VLC_SUCCESS;
-}
+struct decoder_sys_t
+{
+ /* sequence header and extention */
+ block_t *p_seq;
+ block_t *p_ext;
+
+ /* current frame being building */
+ block_t *p_frame;
+ vlc_bool_t b_frame_slice;
+ vlc_bool_t b_frame_corrupted;
+ vlc_bool_t b_gop;
+
+ /* pts of current picture */
+ mtime_t i_pts;
+ mtime_t i_dts;
+
+ /* gathering buffer */
+ int i_buffer;
+ int i_buffer_size;
+ uint8_t *p_buffer;
+ uint8_t *p_start, *p_old;
+
+ /* */
+ int i_frame_rate;
+ int i_frame_rate_base;
+ vlc_bool_t b_seq_progressive;
+ vlc_bool_t b_low_delay;
+
+ /* */
+ int i_temporal_ref;
+ int i_picture_type;
+ int i_picture_structure;
+ int i_top_field_first;
+ int i_repeat_first_field;
+ int i_progressive_frame;
+
+ /* */
+ int i_seq_old; /* How many picture from last seq */
+
+ /* */
+
+ mtime_t i_interpolated_dts;
+ mtime_t i_old_duration;
+ mtime_t i_last_ref_pts;
+};
/*****************************************************************************
- * RunDecoder: this function is called just after the thread is created
+ * Open:
*****************************************************************************/
-static int Run( decoder_fifo_t *p_fifo )
+static int Open( vlc_object_t *p_this )
{
- packetizer_t *p_pack;
- int b_error;
+ decoder_t *p_dec = (decoder_t*)p_this;
+ decoder_sys_t *p_sys;
- msg_Info( p_fifo, "Running mpegvideo packetizer" );
- if( !( p_pack = malloc( sizeof( packetizer_t ) ) ) )
+ if( p_dec->fmt_in.i_codec != VLC_FOURCC( 'm', 'p', 'g', '1' ) &&
+ p_dec->fmt_in.i_codec != VLC_FOURCC( 'm', 'p', 'g', '2' ) &&
+ p_dec->fmt_in.i_codec != VLC_FOURCC( 'm', 'p', 'g', 'v' ) )
{
- msg_Err( p_fifo, "out of memory" );
- DecoderError( p_fifo );
- return( -1 );
+ return VLC_EGENERIC;
}
- memset( p_pack, 0, sizeof( packetizer_t ) );
- p_pack->p_fifo = p_fifo;
+ es_format_Init( &p_dec->fmt_out, VIDEO_ES, VLC_FOURCC( 'm', 'p', 'g', 'v' ) );
+ p_dec->pf_packetize = Packetize;
- if( InitThread( p_pack ) != 0 )
- {
- DecoderError( p_fifo );
- return( -1 );
- }
+ p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
- while( ( !p_pack->p_fifo->b_die )&&( !p_pack->p_fifo->b_error ) )
- {
- PacketizeThread( p_pack );
- }
+ p_sys->p_seq = NULL;
+ p_sys->p_ext = NULL;
+ p_sys->p_frame = NULL;
+ p_sys->b_frame_slice = VLC_FALSE;
+ p_sys->b_frame_corrupted = VLC_FALSE;
+ p_sys->b_gop = VLC_FALSE;
+ p_sys->i_buffer = 0;
+ p_sys->i_buffer_size = 10000;
+ p_sys->p_buffer = malloc( p_sys->i_buffer_size );
+ p_sys->p_start = p_sys->p_buffer;
+ p_sys->p_old = NULL;
- if( ( b_error = p_pack->p_fifo->b_error ) )
- {
- DecoderError( p_pack->p_fifo );
- }
+ p_sys->i_dts = 0;
+ p_sys->i_pts = 0;
- EndThread( p_pack );
+ p_sys->i_frame_rate = 1;
+ p_sys->i_frame_rate_base = 1;
+ p_sys->b_seq_progressive = VLC_TRUE;
+ p_sys->b_low_delay = VLC_TRUE;
+ p_sys->i_seq_old = 0;
- if( p_pack )
- {
- free( p_pack );
- }
+ p_sys->i_temporal_ref = 0;
+ p_sys->i_picture_type = 0;
+ p_sys->i_picture_structure = 0x03; /* frame */
+ p_sys->i_top_field_first = 0;
+ p_sys->i_repeat_first_field = 0;
+ p_sys->i_progressive_frame = 0;
- if( b_error )
- {
- return( -1 );
- }
+ p_sys->i_interpolated_dts = 0;
+ p_sys->i_old_duration = 0;
+ p_sys->i_last_ref_pts = 0;
- return( 0 );
+ return VLC_SUCCESS;
}
-
/*****************************************************************************
- * InitThread: initialize data before entering main loop
+ * Close:
*****************************************************************************/
-
-static int InitThread( packetizer_t *p_pack )
+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;
- p_pack->output_format.i_cat = VIDEO_ES;
- p_pack->output_format.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'v');
- p_pack->output_format.video.i_width = 0;
- p_pack->output_format.video.i_height = 0;
- p_pack->output_format.i_bitrate= 0;
- p_pack->output_format.i_extra = 0;
- p_pack->output_format.p_extra = NULL;
-
- p_pack->b_expect_discontinuity = 0;
- p_pack->p_sout_input = NULL;
-
- if( InitBitstream( &p_pack->bit_stream, p_pack->p_fifo,
- BitstreamCallback, (void *)p_pack ) != VLC_SUCCESS )
+ if( p_sys->p_seq )
{
- msg_Err( p_pack->p_fifo, "cannot initialize bitstream" );
- return -1;
+ block_Release( p_sys->p_seq );
}
-
- return( 0 );
-}
-
-/* from ISO 13818-2 */
-/* converting frame_rate_code to frame_rate */
-static const double pd_frame_rates[16] =
-{
- 0, 24000.0/1001, 24, 25, 30000.0/1001, 30, 50, 60000.0/1001, 60,
- 0, 0, 0, 0, 0, 0, 0
-};
-
-static int CopyUntilNextStartCode( packetizer_t *p_pack,
- sout_buffer_t *p_sout_buffer,
- unsigned int *pi_pos )
-{
- int i_copy = 0;
-
- do
+ if( p_sys->p_ext )
{
- p_sout_buffer->p_buffer[(*pi_pos)++] =
- GetBits( &p_pack->bit_stream, 8 );
- i_copy++;
-
- if( *pi_pos + 2048 > p_sout_buffer->i_buffer_size )
- {
- sout_BufferRealloc( p_pack->p_sout_input->p_sout,
- p_sout_buffer,
- p_sout_buffer->i_buffer_size + 50 * 1024);
- }
-
- } while( ShowBits( &p_pack->bit_stream, 24 ) != 0x01 &&
- !p_pack->p_fifo->b_die && !p_pack->p_fifo->b_error );
-
- return( i_copy );
+ block_Release( p_sys->p_ext );
+ }
+ if( p_sys->p_frame )
+ {
+ block_Release( p_sys->p_frame );
+ }
+ free( p_sys->p_buffer );
+ free( p_sys );
}
/*****************************************************************************
- * PacketizeThread: packetize an unit (here copy a complete pes)
+ * Packetize:
*****************************************************************************/
-static void PacketizeThread( packetizer_t *p_pack )
+static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
{
- sout_buffer_t *p_sout_buffer = NULL;
- vlc_bool_t b_seen_slice = VLC_FALSE;
- int32_t i_pos;
- int i_skipped;
- mtime_t i_duration; /* of the parsed picture */
-
- mtime_t i_pts = 0;
- mtime_t i_dts = 0;
-
- /* needed to calculate pts/dts */
- int i_temporal_ref = 0;
- int i_picture_coding_type = 0;
- int i_picture_structure = 0x03; /* frame picture */
- int i_top_field_first = 0;
- int i_repeat_first_field = 0;
- int i_progressive_frame = 0;
-
- if( !p_pack->p_sout_input )
- {
- byte_t p_temp[512];/* 150 bytes is the maximal size
- of a sequence_header + sequence_extension */
- int i_frame_rate_code;
-
-
- /* skip data until we find a sequence_header_code */
- /* TODO: store skipped somewhere so can send it to the mux
- * after the input is created */
- i_skipped = 0;
- while( ShowBits( &p_pack->bit_stream, 32 ) != 0x1B3 &&
- !p_pack->p_fifo->b_die && !p_pack->p_fifo->b_error )
- {
- RemoveBits( &p_pack->bit_stream, 8 );
- i_skipped++;
- }
- msg_Warn( p_pack->p_fifo, "sequence_header_code found (%d skipped)",
- i_skipped );
-
- /* copy the start_code */
- i_pos = 0;
- GetChunk( &p_pack->bit_stream, p_temp, 4 ); i_pos += 4;
-
- /* horizontal_size_value */
- p_pack->output_format.video.i_width = ShowBits( &p_pack->bit_stream, 12 );
- /* vertical_size_value */
- p_pack->output_format.video.i_height= ShowBits( &p_pack->bit_stream, 24 ) & 0xFFF;
- /* frame_rate_code */
- i_frame_rate_code = ShowBits( &p_pack->bit_stream, 32 ) & 0xF;
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ block_t *p_chain_out = NULL;
+ block_t *p_block;
- /* copy headers */
- GetChunk( &p_pack->bit_stream, p_temp + i_pos, 7 ); i_pos += 7;
+ if( pp_block == NULL || *pp_block == NULL )
+ {
+ return NULL;
+ }
+ p_block = *pp_block;
+ *pp_block = NULL;
- /* intra_quantiser_matrix [non_intra_quantiser_matrix] */
- if( ShowBits( &p_pack->bit_stream, 7 ) & 0x1 )
- {
+ if( p_block->b_discontinuity )
+ {
+ p_sys->b_frame_corrupted = VLC_TRUE;
+ }
- GetChunk( &p_pack->bit_stream, p_temp + i_pos, 64 ); i_pos += 64;
+ /* Append data */
+ if( p_sys->i_buffer + p_block->i_buffer > p_sys->i_buffer_size )
+ {
+ uint8_t *p_buffer = p_sys->p_buffer;
- if( ShowBits( &p_pack->bit_stream, 8 ) & 0x1 )
- {
- GetChunk( &p_pack->bit_stream, p_temp + i_pos, 65); i_pos += 65;
- }
- }
- /* non_intra_quantiser_matrix */
- else if( ShowBits( &p_pack->bit_stream, 8 ) & 0x1 )
- {
- GetChunk( &p_pack->bit_stream, p_temp + i_pos, 65); i_pos += 65;
- }
- /* nothing */
- else
- {
- GetChunk( &p_pack->bit_stream, p_temp + i_pos, 1 ); i_pos += 1;
- }
+ p_sys->i_buffer_size += p_block->i_buffer + 1024;
+ p_sys->p_buffer = realloc( p_sys->p_buffer, p_sys->i_buffer_size );
- /* sequence_extension (10 bytes) */
- if( ShowBits( &p_pack->bit_stream, 32 ) != 0x1B5 )
+ if( p_sys->p_start )
{
- msg_Dbg( p_pack->p_fifo, "ARRGG no extension_start_code" );
- p_pack->i_progressive_sequence = 1;
- p_pack->i_low_delay = 1;
+ p_sys->p_start = p_sys->p_start - p_buffer + p_sys->p_buffer;
}
- else
+ if( p_sys->p_old )
{
- GetChunk( &p_pack->bit_stream, p_temp + i_pos, 10 );
- p_pack->i_progressive_sequence = ( p_temp[i_pos+5]&0x08 ) ? 1 : 0;
- p_pack->i_low_delay = ( p_temp[i_pos+9]&0x80 ) ? 1 : 0;
- i_pos += 10;
+ p_sys->p_old = p_sys->p_old - p_buffer + p_sys->p_buffer;
}
- /* remember sequence_header and sequence_extention */
- memcpy( p_pack->p_sequence_header, p_temp, i_pos );
- p_pack->i_sequence_header_length = i_pos;
-
- p_pack->d_frame_rate = pd_frame_rates[i_frame_rate_code];
-
- msg_Warn( p_pack->p_fifo,
- "creating input (image size %dx%d, frame rate %.2f)",
- p_pack->output_format.video.i_width,
- p_pack->output_format.video.i_height,
- p_pack->d_frame_rate );
-
- /* now we have informations to create the input */
- p_pack->p_sout_input = sout_InputNew( p_pack->p_fifo,
- &p_pack->output_format );
-
- if( !p_pack->p_sout_input )
- {
- msg_Err( p_pack->p_fifo, "cannot add a new stream" );
- p_pack->p_fifo->b_error = VLC_TRUE;
- return;
- }
+ }
+ 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;
- p_sout_buffer = sout_BufferNew( p_pack->p_sout_input->p_sout,
- 100 * 1024 );
- p_sout_buffer->i_size = i_pos;
- memcpy( p_sout_buffer->p_buffer, p_temp, i_pos );
- }
- else
+ if( p_sys->i_buffer > 10*1000000 )
{
- p_sout_buffer =
- sout_BufferNew( p_pack->p_sout_input->p_sout, 100 * 1024 );
- i_pos = 0;
+ msg_Err( p_dec, "mmh reseting context" );
+ p_sys->i_buffer = 0;
}
- p_pack->i_last_sequence_header++;
-
+ /* Split data in block */
for( ;; )
{
- uint32_t i_code;
- if( p_pack->p_fifo->b_die || p_pack->p_fifo->b_error )
+ if( mpgv_FindStartCode( &p_sys->p_start, &p_sys->p_buffer[p_sys->i_buffer] ) )
{
- break;
- }
-
- i_code = ShowBits( &p_pack->bit_stream, 32 );
-
- if( b_seen_slice && ( i_code < 0x101 || i_code > 0x1af ) )
- {
- break;
- }
+ block_Release( p_block );
- if( i_code == 0x1B8 ) /* GOP */
- {
- /* usefull for bad MPEG-1 : repeat the sequence_header
- every second */
- if( p_pack->i_last_sequence_header > (int) p_pack->d_frame_rate )
+ if( p_sys->p_seq == NULL )
{
- memcpy( p_sout_buffer->p_buffer + i_pos,
- p_pack->p_sequence_header,
- p_pack->i_sequence_header_length );
- i_pos += p_pack->i_sequence_header_length;
- p_pack->i_last_sequence_header = 0;
+ block_ChainRelease( p_chain_out );
+ return NULL;
}
- p_sout_buffer->i_flags |= SOUT_BUFFER_FLAGS_GOP;
- CopyUntilNextStartCode( p_pack, p_sout_buffer, &i_pos );
+ return p_chain_out;
}
- else if( i_code == 0x100 ) /* Picture */
- {
- /* picture_start_code */
- GetChunk( &p_pack->bit_stream,
- p_sout_buffer->p_buffer + i_pos, 4 ); i_pos += 4;
-
- NextPTS( &p_pack->bit_stream, &i_pts, &i_dts );
- i_temporal_ref = ShowBits( &p_pack->bit_stream, 10 );
- i_picture_coding_type = ShowBits( &p_pack->bit_stream, 13 ) & 0x3;
- CopyUntilNextStartCode( p_pack, p_sout_buffer, &i_pos );
- }
- else if( i_code == 0x1b5 )
+ if( p_sys->p_old )
{
- /* extention start code 32 */
- GetChunk( &p_pack->bit_stream,
- p_sout_buffer->p_buffer + i_pos, 4 ); i_pos += 4;
+ /* Extract the data */
+ int i_frag = p_sys->p_start - p_sys->p_old;
+ block_t *p_frag = block_New( p_dec, i_frag );
- if( ShowBits( &p_pack->bit_stream, 4 ) == 0x08 )
+ memcpy( p_frag->p_buffer, p_sys->p_old, i_frag );
+ if( i_frag < p_sys->i_buffer )
{
- /* picture coding extention */
-
- /* extention start code identifier(b1000) 4 */
- /* f_code[2][2] 16 */
- /* intra_dc_precision 2 */
- /* picture_structure 2 */
- /* top_field_first 1 */
- i_picture_structure =
- ShowBits( &p_pack->bit_stream, 24 ) & 0x03;
- i_top_field_first =
- ShowBits( &p_pack->bit_stream, 25 ) & 0x01;
- i_repeat_first_field =
- ShowBits( &p_pack->bit_stream, 31 ) & 0x01;
-
- GetChunk( &p_pack->bit_stream,
- p_sout_buffer->p_buffer + i_pos, 4 ); i_pos += 4;
-
- i_progressive_frame =
- ShowBits( &p_pack->bit_stream, 1 ) & 0x01;
+ memmove( p_sys->p_buffer, &p_sys->p_buffer[i_frag],
+ p_sys->i_buffer - i_frag );
}
- CopyUntilNextStartCode( p_pack, p_sout_buffer, &i_pos );
- }
- else
- {
- if( i_code >= 0x101 && i_code <= 0x1af )
+ p_sys->i_buffer -= i_frag;
+ p_sys->p_start -= i_frag;
+ p_sys->p_old -= i_frag;
+
+ if( p_sys->b_frame_slice && ( p_frag->p_buffer[3] == 0x00 || p_frag->p_buffer[3] > 0xaf ) )
{
- b_seen_slice = VLC_TRUE;
+ /* We have a complete picture output it */
+ if( p_sys->p_seq == NULL )
+ {
+ msg_Dbg( p_dec, "waiting sequence start" );
+ block_ChainRelease( p_sys->p_frame );
+ }
+ else if( p_sys->i_dts <= 0 && p_sys->i_pts <= 0 && p_sys->i_interpolated_dts <= 0 )
+ {
+ msg_Dbg( p_dec, "need a starting pts/dts" );
+ block_ChainRelease( p_sys->p_frame );
+ }
+ else if( p_sys->b_frame_corrupted )
+ {
+ msg_Warn( p_dec, "trashing a corrupted picture" );
+ block_ChainRelease( p_sys->p_frame );
+ p_sys->b_frame_corrupted = VLC_FALSE;
+ }
+ else
+ {
+ block_t *p_pic = block_ChainGather( p_sys->p_frame );
+ mtime_t i_duration = (mtime_t)( 1000000 * p_sys->i_frame_rate_base / p_sys->i_frame_rate);
+
+ if( !p_sys->b_seq_progressive && p_sys->i_picture_structure != 0x03 )
+ {
+ i_duration /= 2;
+ }
+
+ if( p_sys->b_seq_progressive )
+ {
+ if( p_sys->i_top_field_first == 0 && p_sys->i_repeat_first_field == 1 )
+ {
+ i_duration *= 2;
+ }
+ else if( p_sys->i_top_field_first == 1 && p_sys->i_repeat_first_field == 1 )
+ {
+ i_duration *= 3;
+ }
+ }
+ else
+ {
+ if( p_sys->i_picture_structure == 0x03 )
+ {
+ if( p_sys->i_progressive_frame && p_sys->i_repeat_first_field )
+ {
+ i_duration += i_duration / 2;
+ }
+ }
+ }
+
+ if( p_sys->b_low_delay || p_sys->i_picture_type == 0x03 )
+ {
+ /* Trivial case (DTS == PTS) */
+ /* Correct interpolated dts when we receive a new pts/dts */
+ if( p_sys->i_pts > 0 ) p_sys->i_interpolated_dts = p_sys->i_pts;
+ if( p_sys->i_dts > 0 ) p_sys->i_interpolated_dts = p_sys->i_dts;
+ }
+ else
+ {
+ /* Correct interpolated dts when we receive a new pts/dts */
+ if( p_sys->i_last_ref_pts > 0 )
+ p_sys->i_interpolated_dts = p_sys->i_last_ref_pts;
+ if( p_sys->i_dts > 0 ) p_sys->i_interpolated_dts = p_sys->i_dts;
+
+ p_sys->i_last_ref_pts = p_sys->i_pts;
+ }
+
+ p_pic->i_dts = p_sys->i_interpolated_dts;
+ /* Set PTS only if I frame or come from stream */
+ if( p_sys->i_pts > 0 )
+ {
+ p_pic->i_pts = p_sys->i_pts;
+ }
+ else if( p_sys->i_picture_type == 0x03 )
+ {
+ p_pic->i_pts = p_pic->i_dts;
+ }
+ else
+ {
+ p_pic->i_pts = -1;
+ }
+
+ if( p_sys->b_low_delay || p_sys->i_picture_type == 0x03 )
+ {
+ /* Trivial case (DTS == PTS) */
+ p_sys->i_interpolated_dts += i_duration;
+ }
+ else
+ {
+ p_sys->i_interpolated_dts += p_sys->i_old_duration;
+ p_sys->i_old_duration = i_duration;
+ }
+
+ p_pic->i_length = p_sys->i_interpolated_dts - p_pic->i_dts;
+
+ //msg_Dbg( p_dec, "pic: type=%d dts=%lld pts-dts=%lld", p_sys->i_picture_type, p_pic->i_dts, p_pic->i_pts - p_pic->i_dts);
+
+ block_ChainAppend( &p_chain_out, p_pic );
+
+ }
+
+ /* reset context */
+ p_sys->p_frame = NULL;
+ p_sys->b_frame_slice = VLC_FALSE;
+ p_sys->b_gop = VLC_FALSE;
+ p_sys->i_pts = 0;
+ p_sys->i_dts = 0;
}
- if( i_code == 0x1B3 )
+ if( p_frag->p_buffer[3] == 0xb8 )
{
- p_pack->i_last_sequence_header = 0;
+ if( p_sys->p_seq &&
+ p_sys->i_seq_old > p_sys->i_frame_rate/p_sys->i_frame_rate_base )
+ {
+ /* Usefull for mpeg1: repeat sequence header every second */
+ block_ChainAppend( &p_sys->p_frame,
+ block_Duplicate( p_sys->p_seq ) );
+ if( p_sys->p_ext )
+ {
+ block_ChainAppend( &p_sys->p_frame,
+ block_Duplicate( p_sys->p_ext ) );
+ }
+
+ p_sys->i_seq_old = 0;
+ }
+ p_sys->b_gop = VLC_TRUE;
}
- CopyUntilNextStartCode( p_pack, p_sout_buffer, &i_pos );
- }
- }
-
- if( i_pts <= 0 && i_dts <= 0 && p_pack->i_interpolated_dts <= 0 )
- {
- msg_Dbg( p_pack->p_fifo, "need a starting pts/dts" );
- sout_BufferDelete( p_pack->p_sout_input->p_sout, p_sout_buffer );
- return;
- }
-
- sout_BufferRealloc( p_pack->p_sout_input->p_sout,
- p_sout_buffer, i_pos );
- p_sout_buffer->i_size = i_pos;
-
- /* calculate frame duration */
- if( p_pack->i_progressive_sequence || i_picture_structure == 0x03)
- {
- i_duration = (mtime_t)( 1000000 / p_pack->d_frame_rate );
- }
- else
- {
- i_duration = (mtime_t)( 1000000 / p_pack->d_frame_rate / 2);
- }
-
- if( p_pack->i_progressive_sequence )
- {
- if( i_top_field_first == 0 && i_repeat_first_field == 1 )
- {
- i_duration = 2 * i_duration;
- }
- else if( i_top_field_first == 1 && i_repeat_first_field == 1 )
- {
- i_duration = 3 * i_duration;
- }
- }
- else
- {
- if( i_picture_structure == 0x03 )
- {
- if( i_progressive_frame && i_repeat_first_field )
+ else if( p_frag->p_buffer[3] == 0xb3 )
{
- i_duration += i_duration / 2;
+ static const int code_to_frame_rate[16][2] =
+ {
+ { 1, 1 }, /* invalid */
+ { 24000, 1001 }, { 24, 1 }, { 25, 1 }, { 30000, 1001 },
+ { 30, 1 }, { 50, 1 }, { 60000, 1001 }, { 60, 1 },
+ { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 }, /* invalid */
+ { 1, 1 }, { 1, 1 }, { 1, 1 } /* invalid */
+ };
+
+ /* sequence header */
+ if( p_sys->p_seq )
+ {
+ block_Release( p_sys->p_seq );
+ }
+ if( p_sys->p_ext )
+ {
+ block_Release( p_sys->p_ext );
+ p_sys->p_ext = NULL;
+ }
+ p_sys->p_seq = block_Duplicate( p_frag );
+ p_sys->i_seq_old = 0;
+
+ p_dec->fmt_out.video.i_width = ( p_frag->p_buffer[4] << 4)|(p_frag->p_buffer[5] >> 4 );
+ p_dec->fmt_out.video.i_height= ( (p_frag->p_buffer[5]&0x0f) << 8 )|p_frag->p_buffer[6];
+
+ p_sys->i_frame_rate = code_to_frame_rate[p_frag->p_buffer[7]&0x0f][0];
+ p_sys->i_frame_rate_base = code_to_frame_rate[p_frag->p_buffer[7]&0x0f][1];
+
+
+ p_sys->b_seq_progressive = VLC_TRUE;
+ p_sys->b_low_delay = VLC_TRUE;
+
+ msg_Dbg( p_dec, "Size %dx%d fps=%.3f",
+ p_dec->fmt_out.video.i_width,
+ p_dec->fmt_out.video.i_height,
+ (float)p_sys->i_frame_rate / (float)p_sys->i_frame_rate_base );
+ }
+ else if( p_frag->p_buffer[3] == 0xb5 )
+ {
+ int i_type = p_frag->p_buffer[4] >> 4;
+ /* extention start code */
+ if( i_type == 0x01 )
+ {
+ /* sequence extention */
+ if( p_sys->p_ext)
+ {
+ block_Release( p_sys->p_ext );
+ }
+ p_sys->p_ext = block_Duplicate( p_frag );
+
+ if( p_frag->i_buffer >= 10 )
+ {
+ p_sys->b_seq_progressive = p_frag->p_buffer[5]&0x08 ? VLC_TRUE : VLC_FALSE;
+ p_sys->b_low_delay = p_frag->p_buffer[9]&0x80 ? VLC_TRUE : VLC_FALSE;
+ }
+ }
+ else if( i_type == 0x08 )
+ {
+ /* picture extention */
+ p_sys->i_picture_structure = p_frag->p_buffer[6]&0x03;
+ p_sys->i_top_field_first = p_frag->p_buffer[7] >> 7;
+ p_sys->i_repeat_first_field= (p_frag->p_buffer[7]>>1)&0x01;
+ p_sys->i_progressive_frame = p_frag->p_buffer[8] >> 7;
+ }
+ }
+ else if( p_frag->p_buffer[3] == 0x00 )
+ {
+ /* picture */
+ p_sys->i_seq_old++;
+
+ if( p_frag->i_buffer >= 6 )
+ {
+ p_sys->i_temporal_ref = ( p_frag->p_buffer[4] << 2 )|(p_frag->p_buffer[5] >> 6);
+ p_sys->i_picture_type = ( p_frag->p_buffer[5] >> 3 )&0x03;
+ }
+ if( !p_sys->b_frame_slice )
+ {
+ p_sys->i_dts = p_block->i_dts; p_block->i_dts = 0;
+ p_sys->i_pts = p_block->i_pts; p_block->i_pts = 0;
+ }
+ }
+ else if( p_frag->p_buffer[3] >= 0x01 && p_frag->p_buffer[3] <= 0xaf )
+ {
+ /* Slice */
+ p_sys->b_frame_slice = VLC_TRUE;
}
- }
- }
-
- if( p_pack->i_low_delay || i_picture_coding_type == 0x03 )
- {
- /* Trivial case (DTS == PTS) */
- /* Correct interpolated dts when we receive a new pts/dts */
- if( i_pts > 0 ) p_pack->i_interpolated_dts = i_pts;
- if( i_dts > 0 ) p_pack->i_interpolated_dts = i_dts;
- }
- else
- {
- /* Correct interpolated dts when we receive a new pts/dts */
- if( p_pack->i_last_ref_pts )
- p_pack->i_interpolated_dts = p_pack->i_last_ref_pts;
- if( i_dts > 0 ) p_pack->i_interpolated_dts = i_dts;
-
- p_pack->i_last_ref_pts = i_pts;
- }
-
- /* Don't even try to calculate the PTS unless it is given in the
- * original stream */
- p_sout_buffer->i_pts = i_pts ? i_pts : -1;
-
- p_sout_buffer->i_dts = p_pack->i_interpolated_dts;
-
- if( p_pack->i_low_delay || i_picture_coding_type == 0x03 )
- {
- /* Trivial case (DTS == PTS) */
- p_pack->i_interpolated_dts += i_duration;
- }
- else
- {
- p_pack->i_interpolated_dts += p_pack->i_old_duration;
- p_pack->i_old_duration = i_duration;
- }
-
- p_sout_buffer->i_length = p_pack->i_interpolated_dts -
- p_sout_buffer->i_dts;
-
- p_sout_buffer->i_bitrate = (int)( 8 * i_pos * p_pack->d_frame_rate );
-
-#if 0
- msg_Dbg( p_pack->p_fifo, "------------> dts=%lld pts=%lld duration=%lld",
- p_sout_buffer->i_dts, p_sout_buffer->i_pts,
- p_sout_buffer->i_length );
-#endif
-
- if ( p_pack->b_expect_discontinuity )
- {
- msg_Warn( p_pack->p_fifo, "discontinuity encountered, dropping a frame" );
- p_pack->b_expect_discontinuity = 0;
- sout_BufferDelete( p_pack->p_sout_input->p_sout, p_sout_buffer );
- }
- else
- {
- sout_InputSendBuffer( p_pack->p_sout_input, p_sout_buffer );
- }
-}
-
-/*****************************************************************************
- * EndThread : packetizer thread destruction
- *****************************************************************************/
-static void EndThread ( packetizer_t *p_pack)
-{
- if( p_pack->p_sout_input )
- {
- sout_InputDelete( p_pack->p_sout_input );
+ /* Append the block */
+ block_ChainAppend( &p_sys->p_frame, p_frag );
+ }
+ p_sys->p_old = p_sys->p_start;
+ p_sys->p_start += 4;
}
}
-/*****************************************************************************
- * BitstreamCallback: Import parameters from the new data/PES packet
- *****************************************************************************
- * This function is called by input's NextDataPacket.
- *****************************************************************************/
-static void BitstreamCallback ( bit_stream_t * p_bit_stream,
- vlc_bool_t b_new_pes )
+static int mpgv_FindStartCode( uint8_t **pp_start, uint8_t *p_end )
{
- packetizer_t * p_pack = (packetizer_t *)p_bit_stream->p_callback_arg;
+ uint8_t *p = *pp_start;
- if( p_bit_stream->p_data->b_discard_payload
- || (b_new_pes && p_bit_stream->p_pes->b_discontinuity) )
+ for( p = *pp_start; p < p_end - 4; p++ )
{
- p_pack->b_expect_discontinuity = 1;
+ if( p[0] == 0 && p[1] == 0 && p[2] == 1 )
+ {
+ *pp_start = p;
+ return VLC_SUCCESS;
+ }
}
+
+ *pp_start = p;
+ return VLC_EGENERIC;
}
+
projects / vlc / commitdiff