--- /dev/null
+/*****************************************************************************
+ * h264.c : H264 Video demuxer
+ *****************************************************************************
+ * Copyright (C) 2002-2004 VideoLAN
+ * $Id: m4v.c 7239 2004-04-02 03:24:53Z fenrir $
+ *
+ * Authors: Laurent Aimar <fenrir@via.ecp.fr>
+ *
+ * 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 <stdlib.h> /* malloc(), free() */
+
+#include <vlc/vlc.h>
+#include <vlc/input.h>
+#include "vlc_codec.h"
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
+
+vlc_module_begin();
+ set_description( _("H264 video demuxer" ) );
+ set_capability( "demux2", 0 );
+ set_callbacks( Open, Close );
+ add_shortcut( "h264" );
+vlc_module_end();
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+struct demux_sys_t
+{
+ mtime_t i_dts;
+ es_out_id_t *p_es;
+
+ decoder_t *p_packetizer;
+};
+
+static int Demux( demux_t * );
+static int Control( demux_t *, int, va_list );
+
+#define H264_PACKET_SIZE 50
+
+/*****************************************************************************
+ * Open: initializes demux structures
+ *****************************************************************************/
+static int Open( vlc_object_t * p_this )
+{
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys;
+ vlc_bool_t b_forced = VLC_FALSE;
+
+ uint8_t *p_peek;
+
+ if( stream_Peek( p_demux->s, &p_peek, 5 ) < 5 )
+ {
+ msg_Err( p_demux, "cannot peek" );
+ return VLC_EGENERIC;
+ }
+
+ if( !strncmp( p_demux->psz_demux, "h264", 4 ) )
+ {
+ b_forced = VLC_TRUE;
+ }
+
+ if( p_peek[0] != 0x00 || p_peek[1] != 0x00 ||
+ p_peek[2] != 0x00 || p_peek[3] != 0x01 ||
+ (p_peek[4]&0x1F) != 7 ) /* SPS */
+ {
+ if( !b_forced )
+ {
+ msg_Warn( p_demux, "h264 module discarded (no startcode)" );
+ return VLC_EGENERIC;
+ }
+
+ msg_Err( p_demux, "this doesn't look like a H264 ES stream, continuing" );
+ }
+
+ p_demux->pf_demux = Demux;
+ p_demux->pf_control= Control;
+ p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
+ p_sys->p_es = NULL;
+ p_sys->i_dts = 1;
+
+ /*
+ * Load the mpegvideo packetizer
+ */
+ p_sys->p_packetizer = vlc_object_create( p_demux, VLC_OBJECT_PACKETIZER );
+ p_sys->p_packetizer->pf_decode_audio = NULL;
+ p_sys->p_packetizer->pf_decode_video = NULL;
+ p_sys->p_packetizer->pf_decode_sub = NULL;
+ p_sys->p_packetizer->pf_packetize = NULL;
+ es_format_Init( &p_sys->p_packetizer->fmt_in, VIDEO_ES,
+ VLC_FOURCC( 'h', '2', '6', '4' ) );
+ es_format_Init( &p_sys->p_packetizer->fmt_out, UNKNOWN_ES, 0 );
+ p_sys->p_packetizer->p_module =
+ module_Need( p_sys->p_packetizer, "packetizer", NULL, 0 );
+
+ if( p_sys->p_packetizer->p_module == NULL)
+ {
+ vlc_object_destroy( p_sys->p_packetizer );
+ msg_Err( p_demux, "cannot find mp4v packetizer" );
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Close: frees unused data
+ *****************************************************************************/
+static void Close( vlc_object_t * p_this )
+{
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ module_Unneed( p_sys->p_packetizer, p_sys->p_packetizer->p_module );
+ vlc_object_destroy( p_sys->p_packetizer );
+
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * Demux: reads and demuxes data packets
+ *****************************************************************************
+ * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
+ *****************************************************************************/
+static int Demux( demux_t *p_demux)
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ block_t *p_block_in, *p_block_out;
+
+ if( ( p_block_in = stream_Block( p_demux->s, H264_PACKET_SIZE ) ) == NULL )
+ {
+ return 0;
+ }
+
+ /* m4v demuxer doesn't set pts/dts at all */
+ p_block_in->i_dts = 1;
+ p_block_in->i_pts = 1;
+
+ while( (p_block_out = p_sys->p_packetizer->pf_packetize( p_sys->p_packetizer, &p_block_in )) )
+ {
+ while( p_block_out )
+ {
+ block_t *p_next = p_block_out->p_next;
+
+ es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_dts );
+
+ p_block_out->i_dts = p_sys->i_dts;
+ p_block_out->i_pts = p_sys->i_dts;
+
+ p_block_out->p_next = NULL;
+
+ if( p_sys->p_es == NULL )
+ {
+ p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_out);
+ }
+
+ es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
+
+ p_block_out = p_next;
+
+ /* FIXME FIXME FIXME FIXME */
+ p_sys->i_dts += (mtime_t)1000000 / 25;
+ /* FIXME FIXME FIXME FIXME */
+ }
+ }
+ return 1;
+}
+
+/*****************************************************************************
+ * Control:
+ *****************************************************************************/
+static int Control( demux_t *p_demux, int i_query, va_list args )
+{
+ /* demux_sys_t *p_sys = p_demux->p_sys; */
+ /* FIXME calculate the bitrate */
+ if( i_query == DEMUX_SET_TIME )
+ return VLC_EGENERIC;
+ else
+ return demux2_vaControlHelper( p_demux->s,
+ 0, -1,
+ 0, 1, i_query, args );
+}
+
--- /dev/null
+/*****************************************************************************
+ * h264.c: h264/avc video packetizer
+ *****************************************************************************
+ * Copyright (C) 2001, 2002 VideoLAN
+ * $Id: mpeg4video.c 7338 2004-04-13 10:52:29Z gbazin $
+ *
+ * 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
+ * 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 <stdlib.h> /* malloc(), free() */
+
+#include <vlc/vlc.h>
+#include <vlc/decoder.h>
+#include <vlc/sout.h>
+
+#include "vlc_block_helper.h"
+#include "vlc_bits.h"
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
+
+vlc_module_begin();
+ set_description( _("H264 video packetizer") );
+ set_capability( "packetizer", 50 );
+ set_callbacks( Open, Close );
+vlc_module_end();
+
+
+/****************************************************************************
+ * Local prototypes
+ ****************************************************************************/
+static block_t *Packetize( decoder_t *, block_t ** );
+
+struct decoder_sys_t
+{
+ block_bytestream_t bytestream;
+
+ int i_state;
+ int i_offset;
+ uint8_t startcode[4];
+
+ vlc_bool_t b_slice;
+ block_t *p_frame;
+
+ int64_t i_dts;
+ int64_t i_pts;
+ unsigned int i_flags;
+
+ vlc_bool_t b_sps;
+};
+
+enum
+{
+ STATE_NOSYNC,
+ STATE_NEXT_SYNC,
+};
+
+enum nal_unit_type_e
+{
+ NAL_UNKNOWN = 0,
+ NAL_SLICE = 1,
+ NAL_SLICE_DPA = 2,
+ NAL_SLICE_DPB = 3,
+ NAL_SLICE_DPC = 4,
+ NAL_SLICE_IDR = 5, /* ref_idc != 0 */
+ NAL_SEI = 6, /* ref_idc == 0 */
+ NAL_SPS = 7,
+ NAL_PPS = 8
+ /* ref_idc == 0 for 6,9,10,11,12 */
+};
+
+enum nal_priority_e
+{
+ NAL_PRIORITY_DISPOSABLE = 0,
+ NAL_PRIORITY_LOW = 1,
+ NAL_PRIORITY_HIGH = 2,
+ NAL_PRIORITY_HIGHEST = 3,
+};
+
+static block_t *ParseNALBlock( decoder_t *, block_t * );
+
+/*****************************************************************************
+ * Open: probe the packetizer and return score
+ *****************************************************************************/
+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( 'h', '2', '6', '4') &&
+ p_dec->fmt_in.i_codec != VLC_FOURCC( 'H', '2', '6', '4') )
+ {
+ 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_state = STATE_NOSYNC;
+ p_sys->i_offset = 0;
+ p_sys->startcode[0] = 0;
+ p_sys->startcode[1] = 0;
+ p_sys->startcode[2] = 0;
+ p_sys->startcode[3] = 1;
+ p_sys->bytestream = block_BytestreamInit( p_dec );
+ p_sys->b_slice = VLC_FALSE;
+ p_sys->p_frame = NULL;
+ p_sys->i_dts = 0;
+ p_sys->i_pts = 0;
+ p_sys->i_flags = 0;
+ p_sys->b_sps = VLC_FALSE;
+
+ /* Setup properties */
+ es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
+ p_dec->fmt_out.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
+
+#if 0
+ 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;
+ }
+#endif
+
+ /* Set callback */
+ p_dec->pf_packetize = Packetize;
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Close: clean up the packetizer
+ *****************************************************************************/
+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 );
+ free( p_sys );
+}
+
+/****************************************************************************
+ * 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;
+ block_t *p_pic;
+
+ if( !pp_block || !*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->startcode, 4 ) == 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 )
+ {
+ /* Need more data */
+ return NULL;
+ }
+
+ p_sys->i_offset = 1; /* To find next startcode */
+
+ case STATE_NEXT_SYNC:
+ /* Find the next startcode */
+ if( block_FindStartcodeFromOffset( &p_sys->bytestream,
+ &p_sys->i_offset, p_sys->startcode, 4 ) != VLC_SUCCESS )
+ {
+ /* Need more data */
+ return NULL;
+ }
+
+ /* Get the new fragment and set the pts/dts */
+ p_pic = block_New( p_dec, p_sys->i_offset );
+ p_pic->i_pts = p_sys->bytestream.p_block->i_pts;
+ p_pic->i_dts = p_sys->bytestream.p_block->i_dts;
+
+ block_GetBytes( &p_sys->bytestream, p_pic->p_buffer,
+ p_pic->i_buffer );
+
+ p_sys->i_offset = 0;
+
+ /* Parse the NAL */
+ if( !( p_pic = ParseNALBlock( p_dec, p_pic ) ) )
+ {
+ p_sys->i_state = STATE_NOSYNC;
+ 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;
+ }
+ }
+}
+
+static void nal_get_decoded( uint8_t **pp_ret, int *pi_ret, uint8_t *src, int i_src )
+{
+ uint8_t *end = &src[i_src];
+ uint8_t *dst = malloc( i_src );
+
+ *pp_ret = dst;
+
+ while( src < end )
+ {
+ if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 && src[2] == 0x03 )
+ {
+ *dst++ = 0x00;
+ *dst++ = 0x00;
+
+ src += 3;
+ }
+ *dst++ = *src++;
+ }
+
+ *pi_ret = dst - *pp_ret;
+}
+
+static inline int bs_read_ue( bs_t *s )
+{
+ int i = 0;
+
+ while( bs_read1( s ) == 0 && s->p < s->p_end && i < 32 )
+ {
+ i++;
+ }
+ return( ( 1 << i) - 1 + bs_read( s, i ) );
+}
+static inline int bs_read_se( bs_t *s )
+{
+ int val = bs_read_ue( s );
+
+ return val&0x01 ? (val+1)/2 : -(val/2);
+}
+
+
+static block_t *ParseNALBlock( decoder_t *p_dec, block_t *p_frag )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ block_t *p_pic = NULL;
+
+ const int i_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
+ const int i_nal_type= p_frag->p_buffer[4]&0x1f;
+
+ if( p_sys->b_slice &&
+ ( i_nal_type == NAL_SLICE || i_nal_type == NAL_SLICE_IDR ||
+ i_nal_type == NAL_SLICE_DPC || i_nal_type == NAL_SPS || i_nal_type == NAL_PPS ) )
+ {
+ if( p_sys->b_sps )
+ {
+ p_pic = block_ChainGather( p_sys->p_frame );
+ p_pic->i_dts = p_sys->i_dts;
+ p_pic->i_pts = p_sys->i_pts;
+ p_pic->i_length = 0; /* FIXME */
+ p_pic->i_flags = p_sys->i_flags;
+ }
+ else
+ {
+ block_ChainRelease( p_sys->p_frame );
+ }
+
+ /* reset context */
+ p_sys->p_frame = NULL;
+ p_sys->b_slice = VLC_FALSE;
+ //p_sys->i_dts += 40000;
+ }
+
+ if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
+ {
+ uint8_t *dec;
+ int i_dec;
+ bs_t s;
+
+ p_sys->b_slice = VLC_TRUE;
+ p_sys->i_dts = p_frag->i_dts;
+ p_sys->i_pts = p_frag->i_pts;
+
+ /* do not convert the whole frame */
+ nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5], __MIN( p_frag->i_buffer - 5, 60 ) );
+ bs_init( &s, dec, i_dec );
+
+ /* i_first_mb */
+ bs_read_ue( &s );
+ /* picture type */
+ switch( bs_read_ue( &s ) )
+ {
+ case 0: case 5:
+ p_sys->i_flags = BLOCK_FLAG_TYPE_P;
+ break;
+ case 1: case 6:
+ p_sys->i_flags =BLOCK_FLAG_TYPE_B;
+ break;
+ case 2: case 7:
+ p_sys->i_flags = BLOCK_FLAG_TYPE_I;
+ break;
+ case 3: case 8: /* SP */
+ p_sys->i_flags = BLOCK_FLAG_TYPE_P;
+ break;
+ case 4: case 9:
+ p_sys->i_flags = BLOCK_FLAG_TYPE_I;
+ break;
+ }
+
+ free( dec );
+ }
+ else if( i_nal_type == NAL_SPS )
+ {
+ uint8_t *dec;
+ int i_dec;
+ bs_t s;
+ int i_tmp;
+
+ p_sys->b_sps = VLC_TRUE;
+
+ nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
+
+ bs_init( &s, dec, i_dec );
+ /* Skip profile(8), constraint_set012, reserver(5), level(8) */
+ bs_skip( &s, 8 + 1+1+1 + 5 + 8 );
+ /* sps id */
+ bs_read_ue( &s );
+ /* Skip i_log2_max_frame_num */
+ bs_read_ue( &s );
+ /* Read poc_type */
+ i_tmp = bs_read_ue( &s );
+ if( i_tmp == 0 )
+ {
+ /* skip i_log2_max_poc_lsb */
+ bs_read_ue( &s );
+ }
+ else if( i_tmp == 1 )
+ {
+ int i_cycle;
+ /* skip b_delta_pic_order_always_zero */
+ bs_skip( &s, 1 );
+ /* skip i_offset_for_non_ref_pic */
+ bs_read_se( &s );
+ /* skip i_offset_for_top_to_bottom_field */
+ bs_read_se( &s );
+ /* read i_num_ref_frames_in_poc_cycle */
+ i_cycle = bs_read_ue( &s );
+ if( i_cycle > 256 ) i_cycle = 256;
+ while( i_cycle > 0 )
+ {
+ /* skip i_offset_for_ref_frame */
+ bs_read_se(&s );
+ }
+ }
+ /* i_num_ref_frames */
+ bs_read_ue( &s );
+ /* b_gaps_in_frame_num_value_allowed */
+ bs_skip( &s, 1 );
+
+ /* Read size */
+ p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
+ p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
+
+ /* b_frame_mbs_only */
+ i_tmp = bs_read( &s, 1 );
+ if( i_tmp == 0 )
+ {
+ bs_skip( &s, 1 );
+ }
+ /* b_direct8x8_inference */
+ bs_skip( &s, 1 );
+
+ /* crop ? */
+ i_tmp = bs_read( &s, 1 );
+ if( i_tmp )
+ {
+ /* left */
+ p_dec->fmt_out.video.i_width -= 2 * bs_read_ue( &s );
+ /* right */
+ p_dec->fmt_out.video.i_width -= 2 * bs_read_ue( &s );
+ /* top */
+ p_dec->fmt_out.video.i_height -= 2 * bs_read_ue( &s );
+ /* bottom */
+ p_dec->fmt_out.video.i_height -= 2 * bs_read_ue( &s );
+ }
+
+ /* vui */
+ i_tmp = bs_read( &s, 1 );
+ if( i_tmp )
+ {
+ /* read the aspect ratio part if any FIXME check it */
+ i_tmp = bs_read( &s, 1 );
+ if( i_tmp )
+ {
+ static const struct { int w, h; } sar[14] =
+ {
+ { 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 },
+ };
+ int i_sar = bs_read( &s, 8 );
+ int w, h;
+
+ if( i_sar < 14 )
+ {
+ w = sar[i_sar].w;
+ h = sar[i_sar].h;
+ }
+ else
+ {
+ w = bs_read( &s, 16 );
+ h = bs_read( &s, 16 );
+ }
+ p_dec->fmt_out.video.i_aspect =
+ VOUT_ASPECT_FACTOR *
+ w / h *
+ p_dec->fmt_out.video.i_width / p_dec->fmt_out.video.i_height;
+ }
+ }
+
+ free( dec );
+ }
+ else if( i_nal_type == NAL_PPS )
+ {
+ bs_t s;
+ bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
+
+ /* TODO */
+ }
+
+
+ /* Append the block */
+ block_ChainAppend( &p_sys->p_frame, p_frag );
+
+ return p_pic;
+}
+
projects / vlc / commitdiff