[vlc-devel] [PATCH] Support for Http Dynamic Streaming
Jonathan Thambidurai
jonathan at fastly.com
Thu May 29 00:27:09 CEST 2014
The newest patch simply removes trailing whitespace.
On Wed, May 28, 2014 at 3:26 PM, Jonathan Thambidurai
<jonathan at fastly.com>wrote:
> ---
> NEWS | 1 +
> modules/MODULES_LIST | 1 +
> modules/stream_filter/Makefile.am | 8 +
> modules/stream_filter/hds/hds.c | 1556
> +++++++++++++++++++++++++++++++++++++
> modules/stream_filter/hds/hds.h | 127 +++
> po/POTFILES.in | 1 +
> 6 files changed, 1694 insertions(+)
> create mode 100644 modules/stream_filter/hds/hds.c
> create mode 100644 modules/stream_filter/hds/hds.h
>
> diff --git a/NEWS b/NEWS
> index 67f2819..92c9511 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -86,6 +86,7 @@ Streaming:
> :std{access=http{mime=video/webm},mux=webm,dst=:4212}'
> * GSM, VP8, Opus and JPEG RTP packetization
> * HLS: Allow setting the first segment number and numerous improvements
> + * HDS: Http Dynamic Streaming - based on public specs from Adobe (f4m,
> f4v, etc.)
> * new stats module to output block timing values and md5 sums
> * transcode module access fps values as rationals now, eg 30000/1001
> * VLC now streams all elementary streams, you can revert to previous
> behaviour
> diff --git a/modules/MODULES_LIST b/modules/MODULES_LIST
> index effd694..082176f 100644
> --- a/modules/MODULES_LIST
> +++ b/modules/MODULES_LIST
> @@ -152,6 +152,7 @@ $Id$
> * grey_yuv: grayscale to others conversion module
> * growl: announce currently playing stream to growl
> * h264: H264 decoder
> + * hds: HTTP Dynamic Streaming, per Adobe's specs
> * headphone_channel_mixer: headphone channel mixer with virtual
> spatialization effect
> * hevc: HEVC demuxer
> * hotkeys: hotkeys control module
> diff --git a/modules/stream_filter/Makefile.am
> b/modules/stream_filter/Makefile.am
> index 158b46a..cbf8751 100644
> --- a/modules/stream_filter/Makefile.am
> +++ b/modules/stream_filter/Makefile.am
> @@ -104,6 +104,14 @@ libsmooth_plugin_la_SOURCES = \
> libsmooth_plugin_la_CFLAGS = $(AM_CFLAGS)
> stream_filter_LTLIBRARIES += libsmooth_plugin.la
>
> +libhds_plugin_la_SOURCES = \
> + stream_filter/hds/hds.c \
> + stream_filter/hds/hds.h
> +
> +libhds_plugin_la_CFLAGS = $(AM_CFLAGS)
> +stream_filter_LTLIBRARIES += libhds_plugin.la
> +
> +
> libhttplive_plugin_la_SOURCES = stream_filter/httplive.c
> libhttplive_plugin_la_CFLAGS = $(AM_CFLAGS) $(GCRYPT_CFLAGS)
> libhttplive_plugin_la_LIBADD = $(GCRYPT_LIBS) -lgpg-error
> diff --git a/modules/stream_filter/hds/hds.c
> b/modules/stream_filter/hds/hds.c
> new file mode 100644
> index 0000000..a91630d
> --- /dev/null
> +++ b/modules/stream_filter/hds/hds.c
> @@ -0,0 +1,1556 @@
>
> +/*****************************************************************************
> + * hds.c: Http Dynamic Streaming (HDS) stream filter
> +
> *****************************************************************************
> + *
> + * Author: Jonathan Thambidurai <jonathan _AT_ fastly _DOT_ com>
> + * Heavily inspired by HDS module of Frédéric Yhuel <fyhuel _AT_ viotech
> _DOT_ net>
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * This library 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
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> 02110-1301 USA
> +
> *****************************************************************************/
> +
> +#ifdef HAVE_CONFIG_H
> +# include "config.h"
> +#endif
> +
> +#include <inttypes.h>
> +
> +#include <vlc_common.h>
> +#include <vlc_strings.h>
> +#include <vlc_plugin.h>
> +#include <vlc_xml.h>
> +#include <vlc_charset.h>
> +#include <vlc_stream.h>
> +#include <vlc_es.h>
> +
> +#include "hds.h"
> +
>
> +/*****************************************************************************
> + * Module descriptor
> +
> *****************************************************************************/
> +static int Open( vlc_object_t * );
> +static void Close( vlc_object_t * );
> +
> +vlc_module_begin()
> + set_category( CAT_INPUT )
> + set_subcategory( SUBCAT_INPUT_STREAM_FILTER )
> + set_description( N_("HTTP Dynamic Streaming") )
> + set_shortname( "Dynamic Streaming")
> + add_shortcut( "hds" )
> + set_capability( "stream_filter", 30 )
> + set_callbacks( Open, Close )
> +vlc_module_end()
> +
> +static int Read( stream_t *, void *, unsigned );
> +static int Peek( stream_t *, const uint8_t **, unsigned );
> +static int Control( stream_t *, int , va_list );
> +
> +static bool isFQUrl( char* url )
> +{
> + return ( NULL != vlc_strcasestr( url, "https://") ||
> + NULL != vlc_strcasestr( url, "http://" ) );
> +}
> +
> +static bool isHDS( stream_t *s )
> +{
> + const uint8_t *peek;
> + int i_size = stream_Peek( s->p_source, &peek, 512 );
> + if( i_size < 512 )
> + return false;
> +
> + char *str;
> +
> + if( !memcmp( peek, "\xFF\xFE", 2 ) )
> + {
> + str = FromCharset( "UTF-16LE", peek, 512 );
> + }
> + else if( !memcmp( peek, "\xFE\xFF", 2 ) )
> + {
> + str = FromCharset( "UTF-16BE", peek, 512 );
> + }
> + else
> + str = peek;
> +
> + if( str == NULL )
> + return false;
> +
> + bool ret = strstr( str, "<manifest" ) != NULL;
> + return ret;
> +}
> +
> +typedef struct _bootstrap_info {
> + char* data;
> + char* id;
> + char* url;
> + char* profile;
> + int data_len;
> +} bootstrap_info;
> +
> +typedef struct _media_info {
> + char* stream_id;
> + char* media_url;
> + char* bootstrap_id;
> +} media_info;
> +
> +static char* parse_asrt( vlc_object_t* p_this,
> + hds_stream_t* s,
> + char* data,
> + char* data_end )
> +{
> + char* data_p = data;
> +
> + uint32_t asrt_len = 0;
> + asrt_len = U32_AT( data_p );
> + if( asrt_len > data_end - data ||
> + data_end - data < 14 )
> + {
> + msg_Err( p_this, "Not enough asrt data (%u, %u)", asrt_len,
> data_end - data );
> + return NULL;
> + }
> +
> + data_p += sizeof(asrt_len);
> +
> + if( 0 != memcmp( "asrt", data_p, 4 ) )
> + {
> + msg_Err( p_this, "Cant find asrt in bootstrap" );
> + return NULL;
> + }
> + data_p += 4;
> +
> + /* ignore flags and versions (we don't handle multiple updates) */
> + data_p += 4;
> +
> + uint8_t quality_entry_count = *data_p;
> + bool quality_found = false;
> + data_p++;
> +
> + if( ! s->quality_segment_modifier )
> + {
> + quality_found = true;
> + }
> +
> + while( quality_entry_count-- > 0 )
> + {
> + char* str_start = data_p;
> + data_p = memchr( data_p, '\0', data_end - data_p );
> + if( ! data_p )
> + {
> + msg_Err( p_this, "Couldn't find quality entry string in asrt"
> );
> + return NULL;
> + }
> + data_p++;
> +
> + if( ! quality_found )
> + {
> + if( ! strncmp( str_start, s->quality_segment_modifier,
> + strlen(s->quality_segment_modifier) ) )
> + {
> + quality_found = true;
> + }
> + }
> +
> + if( data_p >= data_end )
> + {
> + msg_Err( p_this, "Premature end of asrt in quality entries" );
> + return NULL;
> + }
> + }
> +
> + if( data_end - data_p < 4 )
> + {
> + msg_Err( p_this, "Premature end of asrt after quality entries" );
> + return NULL;
> + }
> +
> + uint32_t segment_run_entry_count = U32_AT( data_p );
> + data_p += sizeof(segment_run_entry_count);
> +
> + if( data_end - data_p < 8*segment_run_entry_count )
> + {
> + msg_Err( p_this, "Not enough data in asrt for segment run
> entries" );
> + return NULL;
> + }
> +
> + if( segment_run_entry_count >= MAX_HDS_SEGMENT_RUNS )
> + {
> + msg_Err( p_this, "Too many segment runs" );
> + return NULL;
> + }
> +
> + while( segment_run_entry_count-- > 0 )
> + {
> + if( quality_found )
> + {
> + s->segment_runs[s->segment_run_count].first_segment =
> U32_AT(data_p);
> + }
> + data_p+=4;
> +
> + if( quality_found )
> + {
> + s->segment_runs[s->segment_run_count].fragments_per_segment =
> U32_AT(data_p);
> + }
> + data_p+=4;
> +
> + s->segment_run_count++;
> + }
> +
> + return data_p;
> +}
> +
> +static char* parse_afrt( vlc_object_t* p_this,
> + hds_stream_t* s,
> + char* data,
> + char* data_end )
> +{
> + char* data_p = data;
> +
> + uint32_t afrt_len = U32_AT( data_p );
> + if( afrt_len > data_end - data ||
> + data_end - data < 9 )
> + {
> + msg_Err( p_this, "Not enough afrt data %u, %u", afrt_len,
> data_end - data );
> + return NULL;
> + }
> + data_p += sizeof(afrt_len);
> +
> + if( 0 != memcmp( data_p, "afrt", 4 ) )
> + {
> + msg_Err( p_this, "Cant find afrt in bootstrap" );
> + return NULL;
> + }
> + data_p += 4;
> +
> + /* ignore flags and versions (we don't handle multiple updates) */
> + data_p += 4;
> +
> + if( data_end - data_p < 9 )
> + {
> + msg_Err( p_this, "afrt is too short" );
> + return NULL;
> + }
> +
> + s->afrt_timescale = U32_AT( data_p );
> + data_p += 4;
> +
> + bool quality_found = false;
> + if( ! s->quality_segment_modifier )
> + {
> + quality_found = true;
> + }
> +
> + uint32_t quality_entry_count = *data_p;
> + data_p++;
> + while( quality_entry_count-- > 0 )
> + {
> + char* str_start = data_p;
> + data_p = memchr( data_p, '\0', data_end - data_p );
> + if( ! data_p )
> + {
> + msg_Err( p_this, "Couldn't find quality entry string in afrt"
> );
> + return NULL;
> + }
> + data_p++;
> +
> + if( ! quality_found )
> + {
> + if( ! strncmp( str_start, s->quality_segment_modifier,
> + strlen(s->quality_segment_modifier) ) )
> + {
> + quality_found = true;
> + }
> + }
> + }
> +
> + if( data_end - data_p < 5 )
> + {
> + msg_Err( p_this, "No more space in afrt after quality entries" );
> + return NULL;
> + }
> +
> + uint32_t fragment_run_entry_count = U32_AT( data_p );
> + data_p += sizeof(uint32_t);
> +
> + while(fragment_run_entry_count-- > 0)
> + {
> + if( data_end - data_p < 16 )
> + {
> + msg_Err( p_this, "Not enough data in afrt" );
> + return NULL;
> + }
> +
> + if( s->fragment_run_count >= MAX_HDS_FRAGMENT_RUNS )
> + {
> + msg_Err( p_this, "Too many fragment runs, exiting" );
> + return NULL;
> + }
> +
> + s->fragment_runs[s->fragment_run_count].fragment_number_start =
> U32_AT(data_p);
> + data_p += 4;
> +
> + s->fragment_runs[s->fragment_run_count].fragment_timestamp =
> U64_AT( data_p );
> + data_p += 8;
> +
> + s->fragment_runs[s->fragment_run_count].fragment_duration =
> U32_AT( data_p );
> + data_p += 4;
> +
> + s->fragment_runs[s->fragment_run_count].discont = 0;
> + if( s->fragment_runs[s->fragment_run_count].fragment_duration ==
> 0 )
> + {
> + /* discontinuity flag */
> + s->fragment_runs[s->fragment_run_count].discont = *(data_p++);
> + }
> +
> + s->fragment_run_count++;
> + }
> +
> + return data_p;
> +}
> +
> +static volatile chunk_t* chunk_new()
> +{
> + volatile chunk_t* chunk = malloc(sizeof(chunk_t));
> + memset( chunk, 0, sizeof(chunk_t) );
> + return chunk;
> +}
> +
> +static void chunk_free( volatile chunk_t * chunk )
> +{
> + FREENULL( chunk->data );
> + free( chunk );
> +}
> +
> +static void parse_BootstrapData( vlc_object_t* p_this,
> + hds_stream_t * s,
> + char* data,
> + char* data_end )
> +{
> + char* data_p = data;
> +
> + uint32_t abst_len = U32_AT( data_p );
> + if( abst_len > data_end - data
> + || data_end - data < 29 /* min size of data */ )
> + {
> + msg_Warn( p_this, "Not enough bootstrap data" );
> + return;
> + }
> + data_p += sizeof(abst_len);
> +
> + if( 0 != memcmp( data_p, "abst", 4 ) )
> + {
> + msg_Warn( p_this, "Cant find abst in bootstrap" );
> + return;
> + }
> + data_p += 4;
> +
> + /* version, flags*/
> + data_p += 4;
> +
> + /* we ignore the version */
> + data_p += 4;
> +
> + /* some flags we don't care about here because they are
> + * in the manifest
> + */
> + data_p += 1;
> +
> + /* timescale */
> + s->timescale = U32_AT( data_p );
> + data_p += sizeof(s->timescale);
> +
> + s->live_current_time = U64_AT( data_p );
> + data_p += sizeof(s->live_current_time);
> +
> + /* smtpe time code offset */
> + data_p += 8;
> +
> + s->movie_id = strndup( data_p, data_end - data_p );
> + data_p += ( strlen( s->movie_id ) + 1 );
> +
> + if( data_end - data_p < 4 ) {
> + msg_Warn( p_this, "Not enough bootstrap after Movie Identifier" );
> + return;
> + }
> +
> + uint8_t server_entry_count = 0;
> + server_entry_count = (uint8_t) *data_p;
> + data_p++;
> +
> + s->server_entry_count = 0;
> + while( server_entry_count-- > 0 )
> + {
> + if( s->server_entry_count < MAX_HDS_SERVERS )
> + {
> + s->server_entries[s->server_entry_count++] = strndup( data_p,
> +
> data_end - data_p );
> + data_p += strlen( s->server_entries[s->server_entry_count-1]
> ) + 1;
> + }
> + else
> + {
> + msg_Warn( p_this, "Too many servers" );
> + data_p = memchr( data_p, '\0', data_end );
> + if( ! data_p )
> + {
> + msg_Err( p_this, "Couldn't find server entry" );
> + return NULL;
> + }
> + data_p++;
> + }
> +
> + if( data_p >= data_end )
> + {
> + msg_Warn( p_this, "Premature end of bootstrap info while
> reading servers" );
> + return;
> + }
> + }
> +
> + if( data_end - data_p < 3 ) {
> + msg_Warn( p_this, "Not enough bootstrap after Servers" );
> + return;
> + }
> +
> + s->quality_segment_modifier = 0;
> +
> + uint8_t quality_entry_count = *data_p;
> + data_p++;
> +
> + if( quality_entry_count > 1 )
> + {
> + msg_Err( p_this, "I don't know what to do with multiple quality
> levels in the bootstrap - shouldn't this be handled at the manifest level?"
> );
> + return;
> + }
> +
> + s->quality_segment_modifier = 0;
> + while( quality_entry_count-- > 0 )
> + {
> + if( s->quality_segment_modifier != 0 )
> + {
> + s->quality_segment_modifier = strndup( data_p, data_end -
> data_p );
> + }
> + data_p += strnlen( data_p, data_end - data_p ) + 1;
> + }
> +
> + if( data_end - data_p < 2 ) {
> + msg_Warn( p_this, "Not enough bootstrap after quality entries" );
> + return;
> + }
> +
> + /* ignoring "DrmData" */
> + data_p = memchr( data_p, '\0', data_end - data_p );
> + if( ! data_p )
> + {
> + msg_Err( p_this, "Couldn't find DRM Data" );
> + return NULL;
> + }
> + data_p++;
> +
> + if( data_end - data_p < 2 ) {
> + msg_Warn( p_this, "Not enough bootstrap after drm data" );
> + return;
> + }
> +
> + /* ignoring "metadata" */
> + data_p = memchr( data_p, '\0', data_end - data_p );
> + if( ! data_p )
> + {
> + msg_Err( p_this, "Couldn't find metadata");
> + return NULL;
> + }
> + data_p++;
> +
> + if( data_end - data_p < 2 ) {
> + msg_Warn( p_this, "Not enough bootstrap after drm data" );
> + return;
> + }
> +
> + uint8_t asrt_count = *data_p;
> + data_p++;
> +
> + s->segment_run_count = 0;
> + while( asrt_count-- > 0 &&
> + data_end > data_p &&
> + (data_p = parse_asrt( p_this, s, data_p, data_end )) );
> +
> + uint8_t afrt_count = *data_p;
> + data_p++;
> +
> + s->fragment_run_count = 0;
> + while( afrt_count-- > 0 &&
> + data_end > data_p &&
> + (data_p = parse_afrt( p_this, s, data_p, data_end )) );
> +}
> +
> +/* this only works with ANSI characters - this is ok
> + for the bootstrapinfo field which this function is
> + exclusively used for since it is merely a base64 encoding
> +*/
> +static bool is_whitespace( char c )
> +{
> + return ( ' ' == c ||
> + '\t' == c ||
> + '\n' == c ||
> + '\v' == c ||
> + '\f' == c ||
> + '\r' == c );
> +}
> +
> +/* see above note for is_whitespace */
> +static void whitespace_substr( char** start,
> + char** end )
> +{
> + while( is_whitespace( **start ) && *start != *end ) {
> + (*start)++;
> + }
> +
> + if( *start == *end )
> + return;
> +
> + while( is_whitespace(*(*end - 1) ) ) {
> + end--;
> + }
> +}
> +
> +/* returns length (could be zero, indicating all of remaining data) */
> +/* ptr is to start of data, right after 'mdat' string */
> +static uint32_t find_chunk_mdat( vlc_object_t* p_this,
> + uint8_t* chunkdata, uint8_t*
> chunkdata_end,
> + uint8_t** mdatptr )
> +{
> + char* boxname = 0;
> + char* boxdata = 0;
> + uint64_t boxsize = 0;
> +
> + do {
> + if( chunkdata_end < chunkdata ||
> + chunkdata_end - chunkdata < 8 )
> + {
> + msg_Err( p_this, "Couldn't find mdat in box 1!" );
> + *mdatptr = 0;
> + return 0;
> + }
> +
> + boxsize = U32_AT( chunkdata );
> + chunkdata += 4;
> +
> + boxname = chunkdata;
> + chunkdata += 4;
> +
> + if( boxsize == 1 )
> + {
> + if( chunkdata_end - chunkdata >= 12 )
> + {
> + boxsize = U64_AT(chunkdata);
> + chunkdata += 8;
> + }
> + else
> + {
> + msg_Err( p_this, "Couldn't find mdat in box 2!");
> + *mdatptr = 0;
> + return 0;
> + }
> + boxdata = chunkdata;
> + chunkdata += (boxsize - 16);
> + }
> + else
> + {
> + boxdata = chunkdata;
> + chunkdata += (boxsize - 8);
> + }
> + } while ( 0 != memcmp( boxname, "mdat", 4 ) );
> +
> + *mdatptr = boxdata;
> +
> + return chunkdata_end - ((uint8_t*)boxdata);
> +}
> +
> +/* returns data ptr if valid (updating the chunk itself
> + tells the reader that the chunk is safe to read, which is not yet
> correct)*/
> +static uint8_t* download_chunk( stream_t *s,
> + stream_sys_t* sys,
> + hds_stream_t* stream, volatile chunk_t*
> chunk )
> +{
> + const char* quality = "";
> + char* server_base = sys->base_url;
> + if( stream->server_entry_count > 0 &&
> + strlen(stream->server_entries[0]) > 0 )
> + {
> + server_base = stream->server_entries[0];
> + }
> +
> + if( stream->quality_segment_modifier )
> + {
> + quality = stream->quality_segment_modifier;
> + }
> +
> + const char* movie_id = "";
> + bool free_movie_id = false;
> + if( stream->url && strlen(stream->url) > 0 )
> + {
> + if( isFQUrl( stream->url ) )
> + {
> + server_base = stream->url;
> + }
> + else
> + {
> + movie_id = stream->url;
> + }
> + }
> +
> + char* fragment_url;
> + asprintf( &fragment_url, "%s/%s%sSeg%u-Frag%u",
> + server_base,
> + movie_id,
> + quality,
> + chunk->seg_num,
> + chunk->frag_num );
> + if( ! fragment_url )
> + {
> + msg_Err(s, "Failed to allocate memory for fragment url" );
> + return NULL;
> + }
> +
> + msg_Info(s, "Downloading fragment %s",
> + fragment_url );
> +
> + stream_t* download_stream = stream_UrlNew( s, fragment_url );
> + if( ! download_stream )
> + {
> + msg_Err(s, "Failed to download fragment %s", fragment_url );
> + free( fragment_url );
> + chunk->failed = true;
> + return NULL;
> + }
> + free( fragment_url );
> +
> + int64_t size = stream_Size( download_stream );
> + chunk->data_len = (uint32_t) size;
> +
> + if( size > 50*1024*1024 )
> + {
> + msg_Err(s, "Strangely-large chunk of %"PRIi64" Bytes" );
> + return NULL;
> + }
> +
> + uint8_t* data = malloc( size );
> + if( ! data )
> + {
> + msg_Err(s, "Couldn't allocate chunk" );
> + return NULL;
> + }
> +
> + int read = stream_Read( download_stream, data,
> + size );
> + chunk->data_len = read;
> +
> + if( read < size )
> + {
> + msg_Err( s, "Requested %"PRIi64" bytes, "\
> + "but only got %d", size, read );
> + data = realloc( chunk->data, read );
> + chunk->failed = true;
> + return NULL;
> + }
> + else
> + {
> + chunk->failed = false;
> + }
> +
> + stream_Delete( download_stream );
> + return data;
> +}
> +
> +static void* download_thread( void* p )
> +{
> + vlc_object_t* p_this = (vlc_object_t*)p;
> + stream_t* s = (stream_t*) p_this;
> + stream_sys_t* sys = s->p_sys;
> +
> + // TODO: Change here for selectable stream
> + hds_stream_t* hds_stream = sys->hds_streams->pp_elems[0];
> +
> + int canc = vlc_savecancel();
> +
> + vlc_mutex_lock( & hds_stream->dl_lock );
> +
> + while( ! sys->closed )
> + {
> + if( ! hds_stream->chunks_downloadpos )
> + {
> + volatile chunk_t* chunk = hds_stream->chunks_head;
> + while(chunk && chunk->data )
> + {
> + chunk = chunk->next;
> + }
> +
> + if( chunk && ! chunk->data )
> + hds_stream->chunks_downloadpos = chunk;
> + }
> +
> + while( hds_stream->chunks_downloadpos )
> + {
> + volatile chunk_t *chunk = hds_stream->chunks_downloadpos;
> +
> + uint8_t *data = download_chunk( (stream_t*)p_this,
> + sys,
> + hds_stream,
> + chunk );
> +
> + if( ! chunk->failed )
> + {
> + chunk->mdat_len =
> + find_chunk_mdat( p_this,
> + data,
> + data + chunk->data_len,
> + & chunk->mdat_data );
> + if( chunk->mdat_len == 0 ) {
> + chunk->mdat_len = chunk->data_len - (chunk->mdat_data
> - data);
> + }
> + hds_stream->chunks_downloadpos = chunk->next;
> + chunk->data = data;
> +
> + sys->chunk_count++;
> + }
> + }
> +
> + vlc_cond_wait( & hds_stream->dl_cond,
> + & hds_stream->dl_lock );
> + }
> +
> + vlc_mutex_unlock( & hds_stream->dl_lock );
> +
> + vlc_restorecancel( canc );
> + return NULL;
> +}
> +
> +static volatile chunk_t* generate_new_chunk(
> + vlc_object_t* p_this,
> + volatile chunk_t* last_chunk,
> + hds_stream_t* hds_stream )
> +{
> + stream_t* s = (stream_t*) p_this;
> + stream_sys_t *sys = s->p_sys;
> + volatile chunk_t *chunk = chunk_new();
> + int frun_entry = 0;
> +
> + if( last_chunk )
> + {
> + chunk->timestamp = last_chunk->timestamp + last_chunk->duration;
> + chunk->frag_num = last_chunk->frag_num + 1;
> +
> + if( ! sys->live )
> + {
> + frun_entry = last_chunk->frun_entry;
> + }
> + }
> + else
> + {
> + fragment_run_t* first_frun = hds_stream->fragment_runs;
> + fragment_run_t* latest_frun = hds_stream->fragment_runs + (
> hds_stream->fragment_run_count - 1 );
> + if( sys->live )
> + {
> + chunk->timestamp = (hds_stream->live_current_time *
> ((uint64_t)hds_stream->afrt_timescale)) / ((uint64_t)hds_stream->timescale);
> + }
> + else
> + {
> + chunk->timestamp = first_frun->fragment_timestamp;
> + chunk->frag_num = first_frun->fragment_number_start;
> + }
> + }
> +
> + for( frun_entry; frun_entry < hds_stream->fragment_run_count;
> + frun_entry++ )
> + {
> + /* check for discontinuity first */
> + if( hds_stream->fragment_runs[frun_entry].fragment_duration == 0 )
> + {
> + if( frun_entry == hds_stream->fragment_run_count - 1 )
> + {
> + msg_Err( p_this, "Discontinuity but can't find next
> timestamp!");
> + return NULL;
> + }
> +
> + chunk->frag_num =
> hds_stream->fragment_runs[frun_entry+1].fragment_number_start;
> + chunk->duration =
> hds_stream->fragment_runs[frun_entry+1].fragment_duration;
> + chunk->timestamp =
> hds_stream->fragment_runs[frun_entry+1].fragment_timestamp;
> +
> + frun_entry++;
> + break;
> + }
> +
> + if( chunk->frag_num == 0 )
> + {
> + if( frun_entry == hds_stream->fragment_run_count - 1 ||
> + ( chunk->timestamp >=
> hds_stream->fragment_runs[frun_entry].fragment_timestamp &&
> + chunk->timestamp <
> hds_stream->fragment_runs[frun_entry+1].fragment_timestamp )
> + )
> + {
> + fragment_run_t* frun = hds_stream->fragment_runs +
> frun_entry;
> + chunk->frag_num = frun->fragment_number_start + (
> (chunk->timestamp - frun->fragment_timestamp) /
> +
> frun->fragment_duration );
> + chunk->duration = frun->fragment_duration;
> + }
> +
> + }
> +
> + if( hds_stream->fragment_runs[frun_entry].fragment_number_start <=
> + chunk->frag_num &&
> + (frun_entry == hds_stream->fragment_run_count - 1 ||
> +
> hds_stream->fragment_runs[frun_entry+1].fragment_number_start >
> chunk->frag_num ) )
> + {
> + chunk->duration =
> hds_stream->fragment_runs[frun_entry].fragment_duration;
> + chunk->timestamp =
> hds_stream->fragment_runs[frun_entry].fragment_timestamp +
> + chunk->duration * (chunk->frag_num -
> hds_stream->fragment_runs[frun_entry].fragment_number_start);
> + break;
> + }
> + }
> +
> + if( frun_entry == hds_stream->fragment_run_count )
> + {
> + msg_Err( p_this, "Couldn'd find the fragment run!" );
> + return NULL;
> + }
> +
> + int srun_entry = 0;
> + int segment = 0;
> + uint64_t fragments_accum = chunk->frag_num;
> + for( srun_entry = 0; srun_entry < hds_stream->segment_run_count;
> + srun_entry++ )
> + {
> + segment = hds_stream->segment_runs[srun_entry].first_segment +
> + (chunk->frag_num - fragments_accum ) /
> hds_stream->segment_runs[srun_entry].fragments_per_segment;
> +
> + if( srun_entry + 1 == hds_stream->segment_run_count ||
> + hds_stream->segment_runs[srun_entry+1].first_segment >
> segment )
> + {
> + break;
> + }
> +
> + fragments_accum += (
> + (hds_stream->segment_runs[srun_entry+1].first_segment -
> + hds_stream->segment_runs[srun_entry].first_segment) *
> + hds_stream->segment_runs[srun_entry].fragments_per_segment );
> + }
> +
> + chunk->seg_num = segment;
> + chunk->frun_entry = frun_entry;
> +
> + if( ! sys->live )
> + {
> + if( (chunk->timestamp + chunk->duration) /
> hds_stream->afrt_timescale >= sys->duration_seconds )
> + {
> + chunk->eof = true;
> + }
> + }
> +
> + return chunk;
> +}
> +
> +static void* maintain_live_chunks(
> + vlc_object_t* p_this,
> + hds_stream_t* hds_stream
> + )
> +{
> + if( ! hds_stream->chunks_head )
> + {
> + /* just start with the earliest in the abst
> + * maybe it would be better to use the currentMediaTime?
> + * but then we are right on the edge of buffering, esp for
> + * small fragments */
> + hds_stream->chunks_head = generate_new_chunk( p_this, 0,
> hds_stream );
> + hds_stream->chunks_livereadpos = hds_stream->chunks_head;
> + }
> +
> + volatile chunk_t* chunk = hds_stream->chunks_head;
> + bool dl = false;
> + while( ( chunk->timestamp * ((uint64_t)hds_stream->timescale) )
> + / ((uint64_t)hds_stream->afrt_timescale)
> + <= hds_stream->live_current_time )
> + {
> + if( chunk->next )
> + {
> + chunk = chunk->next;
> + }
> + else
> + {
> + chunk->next = generate_new_chunk( p_this, chunk, hds_stream );
> + chunk = chunk->next;
> + dl = true;
> + }
> + }
> +
> + if( dl )
> + vlc_cond_signal( & hds_stream->dl_cond );
> +
> + chunk = hds_stream->chunks_head;
> + while( chunk && chunk->data && chunk->mdat_pos >= chunk->mdat_len &&
> chunk->next )
> + {
> + volatile chunk_t* next_chunk = chunk->next;
> + chunk_free( chunk );
> + chunk = chunk->next;
> + }
> +
> + if( ! hds_stream->chunks_livereadpos )
> + hds_stream->chunks_livereadpos = hds_stream->chunks_head;
> +
> + hds_stream->chunks_head = chunk;
> +}
> +
> +static void* live_thread( void* p )
> +{
> + vlc_object_t* p_this = (vlc_object_t*)p;
> + stream_t* s = (stream_t*) p_this;
> + stream_sys_t* sys = s->p_sys;
> +
> + // TODO: Change here for selectable stream
> + hds_stream_t* hds_stream = sys->hds_streams->pp_elems[0];
> +
> + int canc = vlc_savecancel();
> +
> + char* abst_url;
> +
> + if( hds_stream->abst_url &&
> + ( isFQUrl( hds_stream->abst_url ) ) )
> + {
> + abst_url = strdup ( hds_stream->abst_url );
> + }
> + else
> + {
> + char* server_base = sys->base_url;
> +
> + asprintf( &abst_url, "%s/%s",
> + server_base,
> + hds_stream->abst_url );
> + }
> +
> + mtime_t last_dl_start_time;
> +
> + while( ! sys->closed )
> + {
> + last_dl_start_time = mdate();
> + stream_t* download_stream = stream_UrlNew( p_this, abst_url );
> + if( ! download_stream )
> + {
> + msg_Err( p_this, "Failed to download abst %s", abst_url );
> + }
> + else
> + {
> + int64_t size = stream_Size( download_stream );
> + uint8_t* data = malloc( size );
> + int read = stream_Read( download_stream, data,
> + size );
> + if( read < size )
> + {
> + msg_Err( p_this, "Requested %"PRIi64" bytes, " \
> + "but only got %d", size, read );
> +
> + }
> + else
> + {
> + vlc_mutex_lock( & hds_stream->abst_lock );
> + parse_BootstrapData( p_this, hds_stream,
> + data, data + read );
> + vlc_mutex_unlock( & hds_stream->abst_lock );
> + maintain_live_chunks( p_this, hds_stream );
> + }
> +
> + free( data );
> +
> + stream_Delete( download_stream );
> + }
> +
> + mwait( last_dl_start_time + (
> ((uint64_t)hds_stream->fragment_runs[hds_stream->fragment_run_count-1].fragment_duration)
> * 1000000ULL) / ((uint64_t)hds_stream->afrt_timescale) );
> +
> +
> + }
> +
> + free( abst_url );
> +
> + vlc_restorecancel( canc );
> + return NULL;
> +}
> +
> +static int parse_Manifest( stream_t *s )
> +{
> + xml_t *vlc_xml = NULL;
> + xml_reader_t *vlc_reader = NULL;
> + int type = UNKNOWN_ES;
> + stream_t *st = s->p_source;
> +
> + msg_Dbg( s, "Manifest parsing\n" );
> +
> + vlc_xml = xml_Create( st );
> + if( !vlc_xml )
> + {
> + msg_Err( s, "Failed to open XML parser" );
> + return VLC_EGENERIC;
> + }
> +
> + vlc_reader = xml_ReaderCreate( vlc_xml, st );
> + if( !vlc_reader )
> + {
> + msg_Err( s, "Failed to open source for parsing" );
> + xml_Delete( vlc_xml );
> + return VLC_EGENERIC;
> + }
> +
> + char *node;
> +
> + stream_sys_t *sys = s->p_sys;
> +
> + sys->duration_seconds = 0;
> +
> +#define MAX_BOOTSTRAP_INFO 10
> + bootstrap_info bootstraps[MAX_BOOTSTRAP_INFO];
> + uint8_t bootstrap_idx = 0;
> + memset( bootstraps, 0, sizeof(bootstrap_info) * MAX_BOOTSTRAP_INFO );
> +
> +#define MAX_MEDIA_ELEMENTS 10
> + media_info medias[MAX_MEDIA_ELEMENTS];
> + uint8_t media_idx = 0;
> + memset( medias, 0, sizeof(media_info) * MAX_MEDIA_ELEMENTS );
> +
> +#define MAX_XML_DEPTH 256
> + char* element_stack[256];
> + uint8_t current_element_idx = 0;
> + char* current_element = 0;
> + memset( element_stack, 0, sizeof(char*) * MAX_XML_DEPTH );
> +
> + const char* attr_name;
> + const char* attr_value;
> +
> + char* media_id = 0;
> +
> +#define TIMESCALE 10000000
> + while( (type = xml_ReaderNextNode( vlc_reader, &node )) > 0 )
> + {
> + switch( type )
> + {
> + case XML_READER_STARTELEM:
> + if( current_element_idx == 0 &&
> element_stack[current_element_idx] == 0 ) {
> + element_stack[current_element_idx] = strdup( node );
> + } else {
> + element_stack[++current_element_idx] = strdup( node );
> + }
> + break;
> + case XML_READER_ENDELEM:
> + if( ! strcmp( current_element, "bootstrapInfo") ) {
> + if( bootstrap_idx + 1 == MAX_BOOTSTRAP_INFO ) {
> + msg_Warn( (vlc_object_t*) s, "Too many bootstraps,
> ignoring" );
> + } else {
> + bootstrap_idx++;
> + }
> + }
> +
> + free( current_element );
> + element_stack[current_element_idx--] = 0;
> + break;
> + }
> +
> + if( ! element_stack[current_element_idx] ) {
> + continue;
> + }
> +
> + current_element = element_stack[current_element_idx];
> +
> + if( type == XML_READER_STARTELEM && ! strcmp( current_element,
> "media") )
> + {
> + if( media_idx == MAX_MEDIA_ELEMENTS )
> + {
> + msg_Err( (vlc_object_t*) s, "Too many media elements,
> quitting" );
> + return VLC_EGENERIC;
> + }
> +
> + while( attr_name = xml_ReaderNextAttr( vlc_reader,
> &attr_value ) )
> + {
> + if( !strcmp(attr_name, "streamId" ) )
> + {
> + medias[media_idx].stream_id = strdup( attr_value );
> + }
> + if( !strcmp(attr_name, "url" ) )
> + {
> + medias[media_idx].media_url = strdup( attr_value );
> + }
> + if( !strcmp(attr_name, "bootstrapInfoId" ) )
> + {
> + medias[media_idx].bootstrap_id = strdup( attr_value );
> + }
> + }
> +
> + media_idx++;
> + }
> +
> + if( type == XML_READER_STARTELEM && ! strcmp( current_element,
> "bootstrapInfo") )
> + {
> + while( attr_name = xml_ReaderNextAttr( vlc_reader,
> &attr_value ) )
> + {
> + if( !strcmp(attr_name, "url" ) )
> + {
> + bootstraps[bootstrap_idx].url = strdup( attr_value );
> + }
> + if( !strcmp(attr_name, "id" ) )
> + {
> + bootstraps[bootstrap_idx].id = strdup( attr_value );
> + }
> + if( !strcmp(attr_name, "profile" ) )
> + {
> + bootstraps[bootstrap_idx].profile = strdup(
> attr_value );
> + }
> + }
> + }
> +
> + if( type == XML_READER_TEXT )
> + {
> + if( ! strcmp( current_element, "bootstrapInfo" ) )
> + {
> + char* start = node;
> + char* end = start + strlen(start);
> + whitespace_substr( &start, &end );
> + *end = '\0';
> +
> + bootstraps[bootstrap_idx].data_len =
> + vlc_b64_decode_binary(
> (uint8_t**)&bootstraps[bootstrap_idx].data, start );
> + if( ! bootstraps[bootstrap_idx].data )
> + {
> + msg_Err( (vlc_object_t*) s, "Couldn't decode
> bootstrap info" );
> + }
> + }
> + if( ! strcmp( current_element, "duration" ) )
> + {
> + sys->duration_seconds = (int)atof( node );
> + }
> + if( ! strcmp( current_element, "id" ) )
> + {
> + if( current_element != 0 &&
> + ! strcmp( element_stack[current_element_idx-1],
> "manifest" ) )
> + {
> + media_id = strdup( node );
> + }
> + }
> + }
> + }
> +
> + xml_ReaderDelete( vlc_reader );
> + xml_Delete( vlc_xml );
> +
> + for( int i = 0; i <= media_idx; i++ )
> + {
> + for( int j = 0; j < bootstrap_idx; j++ )
> + {
> + if( ( ! medias[i].bootstrap_id && ! bootstraps[j].id ) ||
> + (medias[i].bootstrap_id && bootstraps[j].id &&
> + ! strcmp( medias[i].bootstrap_id, bootstraps[j].id ) ) )
> + {
> + hds_stream_t* new_stream = malloc(sizeof(hds_stream_t));
> + memset( new_stream, 0, sizeof(hds_stream_t));
> +
> + vlc_mutex_init( & new_stream->abst_lock );
> + vlc_mutex_init( & new_stream->dl_lock );
> + vlc_cond_init( & new_stream->dl_cond );
> +
> + if( sys->duration_seconds )
> + {
> + sys->live = false;
> + }
> + else
> + {
> + sys->live = true;
> + }
> +
> + if( medias[i].media_url )
> + {
> + new_stream->url = strdup( medias[i].media_url );
> + }
> +
> + if( ! sys->live )
> + {
> + parse_BootstrapData( (vlc_object_t*)s,
> + new_stream,
> + bootstraps[j].data,
> + bootstraps[j].data +
> bootstraps[j].data_len );
> +
> + new_stream->download_leadtime = 15;
> +
> + new_stream->chunks_head = generate_new_chunk( s, 0,
> new_stream );
> + volatile chunk_t* chunk = new_stream->chunks_head;
> + uint64_t total_duration = chunk->duration;
> + while( chunk &&
> total_duration/new_stream->afrt_timescale < new_stream->download_leadtime )
> + {
> + chunk->next = generate_new_chunk( s, chunk,
> new_stream );
> + chunk = chunk->next;
> + if( chunk )
> + total_duration += chunk->duration;
> + }
> + }
> + else
> + {
> + new_stream->abst_url = strdup( bootstraps[j].url );
> + }
> +
> + vlc_array_append( sys->hds_streams, new_stream );
> +
> + msg_Info( (vlc_object_t*)s, "New track with
> quality_segment(%s), timescale(%u), movie_id(%s), segment_run_count(%d),
> fragment_run_count(%u)",
> +
> new_stream->quality_segment_modifier?"":new_stream->quality_segment_modifier,
> new_stream->timescale,
> + new_stream->movie_id,
> new_stream->segment_run_count, new_stream->fragment_run_count );
> +
> + }
> + }
> + }
> +
> + for( int i = 0; i < MAX_MEDIA_ELEMENTS; i++ )
> + {
> + FREENULL( medias[media_idx].stream_id );
> + FREENULL( medias[media_idx].media_url );
> + FREENULL( medias[media_idx].bootstrap_id );
> + }
> +
> + for( int i = 0; i < MAX_BOOTSTRAP_INFO; i++ )
> + {
> + FREENULL( bootstraps[i].data );
> + FREENULL( bootstraps[i].id );
> + FREENULL( bootstraps[i].url );
> + FREENULL( bootstraps[i].profile );
> + }
> +
> + FREENULL( media_id );
> +
> + return VLC_SUCCESS;
> +}
> +
> +static void hds_free( hds_stream_t *p_stream )
> +{
> + FREENULL( p_stream->quality_segment_modifier );
> +
> + FREENULL( p_stream->abst_url );
> +
> + FREENULL( p_stream->url );
> + FREENULL( p_stream->movie_id );
> + for( int i = 0; i < p_stream->server_entry_count; i++ )
> + {
> + FREENULL( p_stream->server_entries[i] );
> + }
> +
> + volatile chunk_t* chunk = p_stream->chunks_head;
> + while( chunk )
> + {
> + volatile chunk_t* next = chunk->next;
> + chunk_free( chunk );
> + chunk = next;
> + }
> +
> + free( p_stream );
> +}
> +
> +static void SysCleanup( stream_sys_t *p_sys )
> +{
> + if ( p_sys->hds_streams )
> + {
> + for ( int i=0; i< p_sys->hds_streams->i_count ; i++ )
> + hds_free( p_sys->hds_streams->pp_elems[i] );
> + vlc_array_destroy( p_sys->hds_streams );
> + }
> + free( p_sys->base_url );
> +}
> +
> +static int Open( vlc_object_t *p_this )
> +{
> + stream_t *s = (stream_t*)p_this;
> + stream_sys_t *p_sys;
> +
> + if( !isHDS( s ) )
> + return VLC_EGENERIC;
> +
> + msg_Info( p_this, "HTTP Dynamic Streaming (%s)", s->psz_path );
> +
> + s->p_sys = p_sys = calloc( 1, sizeof(*p_sys ) );
> + if( unlikely( p_sys == NULL ) )
> + return VLC_ENOMEM;
> +
> + char *uri = NULL;
> + if( unlikely( asprintf( &uri, "%s://%s", s->psz_access, s->psz_path )
> < 0 ) )
> + {
> + free( p_sys );
> + return VLC_ENOMEM;
> + }
> +
> + /* remove the last part of the url */
> + char *pos = strrchr( uri, '/');
> + *pos = '\0';
> + p_sys->base_url = uri;
> +
> + p_sys->flv_header_bytes_sent = 0;
> +
> + p_sys->hds_streams = vlc_array_new();
> +
> + if( parse_Manifest( s ) != VLC_SUCCESS )
> + {
> + SysCleanup( p_sys );
> + free( p_sys );
> + return VLC_EGENERIC;
> + }
> +
> + s->pf_read = Read;
> + s->pf_peek = Peek;
> + s->pf_control = Control;
> +
> + if( vlc_clone( &p_sys->dl_thread, download_thread, s,
> VLC_THREAD_PRIORITY_INPUT ) )
> + {
> + SysCleanup( p_sys );
> + free( p_sys );
> + return VLC_EGENERIC;
> + }
> +
> + if( p_sys->live ) {
> + msg_Info( p_this, "Live stream detected" );
> +
> + if( vlc_clone( &p_sys->live_thread, live_thread, s,
> VLC_THREAD_PRIORITY_INPUT ) )
> + {
> + SysCleanup( p_sys );
> + free( p_sys );
> + return VLC_EGENERIC;
> + }
> + }
> +
> +
> + return VLC_SUCCESS;
> +}
> +
> +static void Close( vlc_object_t *p_this )
> +{
> + stream_t *s = (stream_t*)p_this;
> + stream_sys_t *p_sys = s->p_sys;
> +
> + // TODO: Change here for selectable stream
> + hds_stream_t *stream = s->p_sys->hds_streams->pp_elems[0];
> +
> + p_sys->closed = true;
> + vlc_cond_signal( & stream->dl_cond );
> +
> + vlc_join( p_sys->dl_thread, NULL );
> + vlc_mutex_destroy( &stream->dl_lock );
> + vlc_cond_destroy( &stream->dl_cond );
> + vlc_mutex_destroy( &stream->abst_lock );
> +
> + if( p_sys->live )
> + {
> + vlc_join( p_sys->live_thread, NULL );
> + }
> +
> + SysCleanup( p_sys );
> + free( p_sys );
> +}
> +
> +static unsigned char flv_header[] = {
> + 'F',
> + 'L',
> + 'V',
> + 0x1, //version
> + 0x5, //indicates audio and video
> + 0x0, // length
> + 0x0, // length
> + 0x0, // length
> + 0x9, // length of header
> + 0x0,
> + 0x0,
> + 0x0,
> + 0x0, // initial "trailer"
> +};
> +
> +static int send_flv_header( stream_sys_t* p_sys, void* buffer, unsigned
> i_read,
> + bool peek )
> +{
> + uint32_t to_be_read = i_read;
> + if( to_be_read > 13 - p_sys->flv_header_bytes_sent ) {
> + to_be_read = 13 - p_sys->flv_header_bytes_sent;
> + }
> +
> + memcpy( buffer, flv_header + p_sys->flv_header_bytes_sent, to_be_read
> );
> +
> + if( ! peek )
> + {
> + p_sys->flv_header_bytes_sent += to_be_read;
> + }
> + return to_be_read;
> +}
> +
> +static unsigned read_chunk_data(
> + vlc_object_t* p_this,
> + uint8_t* buffer, unsigned read_len,
> + hds_stream_t* stream,
> + bool* eof
> + )
> +{
> + stream_t* s = (stream_t*) p_this;
> + stream_sys_t* sys = s->p_sys;
> + volatile chunk_t* chunk = stream->chunks_head;
> + uint8_t* buffer_start = buffer;
> + bool dl = false;
> +
> + while( chunk && chunk->data && read_len > 0 )
> + {
> + /* in the live case, it is necessary to store the next
> + * pointer here, since as soon as we increment the mdat_pos, that
> + * chunk may be deleted */
> + volatile chunk_t* next = chunk->next;
> +
> + if( chunk->mdat_pos < chunk->mdat_len )
> + {
> + unsigned cp_len = chunk->mdat_len - chunk->mdat_pos;
> + if( cp_len > read_len )
> + cp_len = read_len;
> + memcpy( buffer, chunk->mdat_data + chunk->mdat_pos,
> + cp_len );
> +
> + read_len -= cp_len;
> + buffer += cp_len;
> + chunk->mdat_pos += cp_len;
> + }
> +
> + if( ! sys->live && (chunk->mdat_pos >= chunk->mdat_len ||
> chunk->failed) )
> + {
> + if( chunk->eof )
> + {
> + *eof = true;
> + }
> +
> + /* make sure there is at least one chunk in the queue */
> + if( ! chunk->next && ! chunk->eof )
> + {
> + chunk->next = generate_new_chunk( p_this, chunk, stream
> );
> + dl = true;
> + }
> +
> + chunk_free( chunk );
> + chunk = next;
> + stream->chunks_head = chunk;
> + }
> + else if( sys->live && (chunk->mdat_pos >= chunk->mdat_len ||
> chunk->failed) )
> + {
> + chunk = next;
> + }
> + }
> +
> + if( sys->live )
> + {
> + stream->chunks_livereadpos = chunk;
> + }
> +
> + /* new chunk generation is handled by a different thread in live case
> */
> + if( ! sys->live )
> + {
> + chunk = stream->chunks_head;
> + if( chunk )
> + {
> + uint64_t total_duration = chunk->duration;
> + while( chunk && total_duration/stream->afrt_timescale <
> stream->download_leadtime )
> + {
> + if( ! chunk->next )
> + {
> + chunk->next = generate_new_chunk( p_this, chunk,
> stream );
> + dl = true;
> + }
> + chunk = chunk->next;
> + total_duration += chunk->duration;
> + }
> + }
> +
> + if( dl )
> + vlc_cond_signal( & stream->dl_cond );
> + }
> +
> + return ( ((uint8_t*)buffer) - ((uint8_t*)buffer_start));
> +}
> +
> +static int Read( stream_t *s, void *buffer, unsigned i_read )
> +{
> + stream_sys_t *p_sys = s->p_sys;
> +
> + // TODO: change here for selectable stream
> + hds_stream_t *stream = s->p_sys->hds_streams->pp_elems[0];
> + int length = 0;
> +
> + uint8_t *buffer_uint8 = (uint8_t*) buffer;
> +
> + unsigned hdr_bytes = send_flv_header( p_sys, buffer, i_read, false );
> + length += hdr_bytes;
> + i_read -= hdr_bytes;
> + buffer_uint8 += hdr_bytes;
> +
> + bool eof = false;
> + while( i_read > 0 && ! eof )
> + {
> + int tmp_length = read_chunk_data( s, buffer_uint8, i_read,
> stream, &eof );
> + buffer_uint8 += tmp_length;
> + i_read -= tmp_length;
> + length += tmp_length;
> + }
> +
> + return length;
> +}
> +
> +static int Peek( stream_t *s, const uint8_t **pp_peek, unsigned i_peek )
> +{
> + stream_sys_t *p_sys = s->p_sys;
> +
> + // TODO: change here for selectable stream
> + hds_stream_t *stream = p_sys->hds_streams->pp_elems[0];
> +
> + if( p_sys->flv_header_bytes_sent < 13 )
> + {
> + *pp_peek = flv_header + p_sys->flv_header_bytes_sent;
> + return 13 - p_sys->flv_header_bytes_sent;
> + }
> +
> + if( stream->chunks_head && ! stream->chunks_head->failed &&
> stream->chunks_head->data )
> + {
> + // TODO: change here for selectable stream
> + volatile chunk_t* chunk = stream->chunks_head;
> + *pp_peek = chunk->mdat_data + chunk->mdat_pos;
> + if( chunk->mdat_len - chunk->mdat_pos < i_peek )
> + {
> + return chunk->mdat_len - chunk->mdat_pos;
> + }
> + else
> + {
> + return i_peek;
> + }
> + } else
> + {
> + return 0;
> + }
> +}
> +
> +static int Control( stream_t *s, int i_query, va_list args )
> +{
> + stream_sys_t *p_sys = s->p_sys;
> +
> + switch( i_query )
> + {
> + case STREAM_CAN_SEEK:
> + *(va_arg( args, bool * )) = false;
> + break;
> + case STREAM_CAN_FASTSEEK:
> + case STREAM_CAN_PAUSE: /* TODO */
> + *(va_arg( args, bool * )) = false;
> + break;
> + case STREAM_CAN_CONTROL_PACE:
> + *(va_arg( args, bool * )) = true;
> + break;
> + case STREAM_GET_PTS_DELAY:
> + *va_arg (args, int64_t *) = INT64_C(1000) *
> + var_InheritInteger(s, "network-caching");
> + break;
> + default:
> + return VLC_EGENERIC;
> + }
> + return VLC_SUCCESS;
> +}
> diff --git a/modules/stream_filter/hds/hds.h
> b/modules/stream_filter/hds/hds.h
> new file mode 100644
> index 0000000..6a8c9c7
> --- /dev/null
> +++ b/modules/stream_filter/hds/hds.h
> @@ -0,0 +1,127 @@
>
> +/*****************************************************************************
> + * hds.h: misc. stuff
> +
> *****************************************************************************
> + *
> + * Author: Jonathan Thambidurai <jonathan AT fastly DOT com>
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * This library 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
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> 02110-1301 USA
> +
> *****************************************************************************/
> +
> +#ifndef _VLC_HDS_H
> +#define _VLC_HDS_H 1
> +
> +typedef struct chunk_s
> +{
> + int64_t duration; /* chunk duration in afrt timescale units */
> + int64_t timestamp;
> + int32_t frag_num;
> + uint32_t seg_num;
> + uint32_t frun_entry; /* Used to speed things up in vod situations
> */
> +
> + uint32_t data_len;
> +
> + uint32_t mdat_pos; /* position in the mdat */
> + uint32_t mdat_len;
> +
> + void *next;
> +
> + uint8_t *mdat_data;
> + uint8_t *data;
> + bool failed;
> + bool eof;
> +} chunk_t;
> +
> +typedef struct segment_run_s
> +{
> + uint32_t first_segment;
> + uint32_t fragments_per_segment;
> +} segment_run_t;
> +
> +typedef struct fragment_run_s
> +{
> + uint32_t fragment_number_start;
> + uint32_t fragment_duration;
> + uint64_t fragment_timestamp;
> + uint8_t discont;
> +} fragment_run_t;
> +
> +typedef struct hds_stream_s
> +{
> + /* linked-list of chunks */
> + volatile chunk_t *chunks_head;
> + volatile chunk_t *chunks_livereadpos;
> + volatile chunk_t *chunks_downloadpos;
> +
> + char* quality_segment_modifier;
> +
> + /* we can make this configurable */
> + uint64_t download_leadtime;
> +
> + /* in timescale units */
> + uint32_t total_duration;
> +
> + uint32_t afrt_timescale;
> +
> + /* these two values come from the abst */
> + uint32_t timescale;
> + uint64_t live_current_time;
> +
> + vlc_mutex_t abst_lock;
> +
> + vlc_mutex_t dl_lock;
> + vlc_cond_t dl_cond;
> +
> + /* can be left as null */
> + char* abst_url;
> +
> + /* this comes from the manifest media section */
> + char* url;
> +
> + /* this comes from the bootstrap info */
> + char* movie_id;
> +
> +#define MAX_HDS_SERVERS 10
> + char* server_entries[MAX_HDS_SERVERS];
> + uint8_t server_entry_count;
> +
> +#define MAX_HDS_SEGMENT_RUNS 256
> + segment_run_t segment_runs[MAX_HDS_SEGMENT_RUNS];
> + uint8_t segment_run_count;
> +
> +#define MAX_HDS_FRAGMENT_RUNS 10000
> + fragment_run_t fragment_runs[MAX_HDS_FRAGMENT_RUNS];
> + uint32_t fragment_run_count;
> +} hds_stream_t;
> +
> +struct stream_sys_t
> +{
> + char *base_url; /* URL common part for chunks */
> + vlc_thread_t live_thread;
> + vlc_thread_t dl_thread;
> +
> + /* we pend on peek until some number of segments arrives; otherwise
> + * the downstream system dies in case of playback */
> + volatile uint64_t chunk_count;
> +
> + vlc_array_t *hds_streams; /* available streams */
> +
> + uint32_t flv_header_bytes_sent;
> + uint32_t duration_seconds;
> +
> + bool live;
> + bool closed;
> +};
> +
> +#endif
> diff --git a/po/POTFILES.in b/po/POTFILES.in
> index 0a86072..cacff6a 100644
> --- a/po/POTFILES.in
> +++ b/po/POTFILES.in
> @@ -1009,6 +1009,7 @@ modules/services_discovery/windrive.c
> modules/services_discovery/xcb_apps.c
> modules/stream_filter/dash/dash.cpp
> modules/stream_filter/decomp.c
> +modules/stream_filter/hds/hds.c
> modules/stream_filter/httplive.c
> modules/stream_filter/record.c
> modules/stream_filter/smooth/smooth.c
> --
> 1.9.1
>
>
--
*Jonathan Thambidurai* | Engineer | 650 440 3421
fastly.com | @fastly <https://twitter.com/fastly> |
LinkedIn<http://www.linkedin.com/company/fastly>
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