Пример #1
0
GF_Err ISOR_DisconnectChannel(GF_InputService *plug, LPNETCHANNEL channel)
{
	ISOMChannel *ch;
	GF_Err e;
	ISOMReader *read;
	if (!plug || !plug->priv) return GF_SERVICE_ERROR;
	read = (ISOMReader *) plug->priv;
	if (!read->mov) return GF_SERVICE_ERROR;

	gf_mx_p(read->segment_mutex);
	e = GF_OK;
	ch = isor_get_channel(read, channel);
	assert(ch);
	if (!ch) {
		e = GF_STREAM_NOT_FOUND;
		goto exit;
	}
	/*signal the service is broken but still process the delete*/
	isor_delete_channel(read, ch);
	assert(!isor_get_channel(read, channel));

exit:
	if (read->input->query_proxy && read->input->proxy_udta && read->input->proxy_type) {
		send_proxy_command(read, 1, 0, e, NULL, channel);
	} else {
		gf_service_disconnect_ack(read->service, channel, e);
	}
	gf_mx_v(read->segment_mutex);
	return e;
}
Пример #2
0
GF_Err ISOR_ChannelGetSLP(GF_InputService *plug, LPNETCHANNEL channel, char **out_data_ptr, u32 *out_data_size, GF_SLHeader *out_sl_hdr, Bool *sl_compressed, GF_Err *out_reception_status, Bool *is_new_data)
{
    ISOMChannel *ch;
    ISOMReader *read;
    if (!plug || !plug->priv) return GF_SERVICE_ERROR;
    /*cannot read native SL-PDUs*/
    if (!out_sl_hdr) return GF_NOT_SUPPORTED;
    read = (ISOMReader *) plug->priv;
    if (!read->mov) return GF_SERVICE_ERROR;

    *out_data_ptr = NULL;
    *out_data_size = 0;
    *sl_compressed = 0;
    *out_reception_status = GF_OK;
    ch = isor_get_channel(read, channel);
    if (!ch) return GF_STREAM_NOT_FOUND;
    if (!ch->is_playing) return GF_OK;

    *is_new_data = 0;
    if (!ch->sample) {
        /*get sample*/
        isor_reader_get_sample(ch);
        *is_new_data = ch->sample ? 1 : 0;
    }

    if (ch->sample) {
        *out_data_ptr = ch->sample->data;
        *out_data_size = ch->sample->dataLength;
        *out_sl_hdr = ch->current_slh;
    }
    *out_reception_status = ch->last_state;
    return GF_OK;
}
Пример #3
0
GF_Err ISOR_DisconnectChannel(GF_InputService *plug, LPNETCHANNEL channel)
{
    ISOMChannel *ch;
    GF_Err e;
    ISOMReader *read;
    if (!plug || !plug->priv) return GF_SERVICE_ERROR;
    read = (ISOMReader *) plug->priv;
    if (!read->mov) return GF_SERVICE_ERROR;

    e = GF_OK;
    ch = isor_get_channel(read, channel);
    assert(ch);
    if (!ch) {
        e = GF_STREAM_NOT_FOUND;
        goto exit;
    }
    /*signal the service is broken but still process the delete*/
    isor_delete_channel(read, ch);
    assert(!isor_get_channel(read, channel));

exit:
    gf_term_on_disconnect(read->service, channel, e);
    return e;
}
Пример #4
0
GF_Err ISOR_ChannelReleaseSLP(GF_InputService *plug, LPNETCHANNEL channel)
{
    ISOMChannel *ch;
    ISOMReader *read;
    if (!plug || !plug->priv) return GF_SERVICE_ERROR;
    read = (ISOMReader *) plug->priv;
    if (!read->mov) return GF_SERVICE_ERROR;
    ch = isor_get_channel(read, channel);
    if (!ch) return GF_STREAM_NOT_FOUND;
    if (!ch->is_playing) return GF_SERVICE_ERROR;

    if (ch->sample) {
        isor_reader_release_sample(ch);
        /*release sample*/
    }
    return GF_OK;
}
Пример #5
0
static GF_Err ISOW_Write(GF_StreamingCache *mc, LPNETCHANNEL ch, char *data, u32 data_size, GF_SLHeader *sl_hdr)
{
	ISOMChannel *mch;
	GF_ESD *esd;
	u32 di, mtype;
	u64 DTS, CTS;
	ISOMReader *cache = (ISOMReader *)mc->priv;
	if (!cache->mov || !cache->service) return GF_BAD_PARAM;

	mch = isor_get_channel(cache, ch);
	if (!mch) {
		Bool mapped;
		GF_NetworkCommand com;
		com.base.on_channel = ch;
		com.base.command_type = GF_NET_CHAN_GET_ESD;
		gf_service_command(cache->service, &com, GF_OK);
		if (!com.cache_esd.esd) return GF_SERVICE_ERROR;

		esd = (GF_ESD *)com.cache_esd.esd;
		switch (esd->decoderConfig->streamType) {
		case GF_STREAM_OD:
			mtype = GF_ISOM_MEDIA_OD;
			break;
		case GF_STREAM_SCENE:
			mtype = GF_ISOM_MEDIA_SCENE;
			break;
		case GF_STREAM_VISUAL:
			mtype = GF_ISOM_MEDIA_VISUAL;
			break;
		case GF_STREAM_AUDIO:
			mtype = GF_ISOM_MEDIA_AUDIO;
			break;
		case GF_STREAM_MPEG7:
			mtype = GF_ISOM_MEDIA_MPEG7;
			break;
		case GF_STREAM_OCI:
			mtype = GF_ISOM_MEDIA_OCI;
			break;
		case GF_STREAM_IPMP:
			mtype = GF_ISOM_MEDIA_IPMP;
			break;
		case GF_STREAM_MPEGJ:
			mtype = GF_ISOM_MEDIA_MPEGJ;
			break;
		case GF_STREAM_TEXT:
			mtype = GF_ISOM_MEDIA_TEXT;
			break;
		default:
			return GF_NOT_SUPPORTED;
		}
		GF_SAFEALLOC(mch, ISOMChannel);
		if (!mch) {
			return GF_OUT_OF_MEM;
		}
		mch->time_scale = esd->slConfig->timestampResolution;
		mch->streamType = esd->decoderConfig->streamType;
		mch->track = gf_isom_new_track(cache->mov, com.cache_esd.esd->ESID, mtype, mch->time_scale);
		mch->is_playing = GF_TRUE;
		mch->channel = ch;
		mch->owner = cache;
		gf_isom_set_track_enabled(cache->mov, mch->track, 1);
		/*translate 3GP streams to MP4*/
		mapped = GF_FALSE;
		if (esd->decoderConfig->objectTypeIndication==GPAC_OTI_MEDIA_GENERIC) {
			char szCode[5];
			strncpy(szCode, esd->decoderConfig->decoderSpecificInfo->data, 4);
			szCode[4]=0;
			if (!stricmp(szCode, "samr") || !stricmp(szCode, "amr ") || !stricmp(szCode, "sawb")) {
				GF_3GPConfig amrc;
				mapped = GF_TRUE;
				memset(&amrc, 0, sizeof(GF_3GPConfig));

				amrc.frames_per_sample = (u32) esd->decoderConfig->decoderSpecificInfo->data[13];
				amrc.type = (!stricmp(szCode, "sawb")) ? GF_ISOM_SUBTYPE_3GP_AMR_WB : GF_ISOM_SUBTYPE_3GP_AMR;
				amrc.vendor = GF_VENDOR_GPAC;
				gf_isom_3gp_config_new(cache->mov, mch->track, &amrc, NULL, NULL, &di);
			} else if (!stricmp(szCode, "h263")) {
				GF_3GPConfig h263c;
				memset(&h263c, 0, sizeof(GF_3GPConfig));
				h263c.type = GF_ISOM_SUBTYPE_3GP_H263;
				h263c.vendor = GF_VENDOR_GPAC;
				gf_isom_3gp_config_new(cache->mov, mch->track, &h263c, NULL, NULL, &di);
				mapped = GF_TRUE;
			}
		}
		if (!mapped) gf_isom_new_mpeg4_description(cache->mov, mch->track, esd, NULL, NULL, &di);
		if (com.cache_esd.is_iod_stream) gf_isom_add_track_to_root_od(cache->mov, mch->track);
		gf_list_add(cache->channels, mch);
	}

	/*first sample, cache it*/
	if (!mch->cache_sample) {
		mch->cache_seed_ts = sl_hdr->decodingTimeStamp;
		mch->cache_sample = gf_isom_sample_new();
		mch->cache_sample->IsRAP = sl_hdr->randomAccessPointFlag;
		mch->cache_sample->dataLength = data_size;
		mch->cache_sample->data = (char*)gf_malloc(sizeof(char)*data_size);
		memcpy(mch->cache_sample->data, data, sizeof(char)*data_size);
		return GF_OK;
	}

	/*adjust DTS/CTS*/
	DTS = sl_hdr->decodingTimeStamp - mch->cache_seed_ts;

	if ((mch->streamType==GF_STREAM_VISUAL) && (DTS<=mch->cache_sample->DTS)) {
		assert(DTS>mch->prev_dts);
		CTS = mch->cache_sample->DTS + mch->cache_sample->CTS_Offset;
		mch->cache_sample->CTS_Offset = 0;

		/*first time, shift all CTS*/
		if (!mch->frame_cts_offset) {
			u32 i, count = gf_isom_get_sample_count(cache->mov, mch->track);
			mch->frame_cts_offset = (u32) (DTS-mch->prev_dts);
			for (i=0; i<count; i++) {
				gf_isom_modify_cts_offset(cache->mov, mch->track, i+1, mch->frame_cts_offset);
			}
			mch->cache_sample->CTS_Offset += mch->frame_cts_offset;
		}
		mch->cache_sample->DTS = mch->prev_dts + mch->frame_cts_offset;
		mch->cache_sample->CTS_Offset += (u32) (CTS-mch->cache_sample->DTS);
	}
	/*deal with reference picture insertion: if no CTS offset and biggest CTS until now, this is
	a reference insertion - we must check that in order to make sure we have strictly increasing DTSs*/
	if (mch->max_cts && !mch->cache_sample->CTS_Offset && (mch->cache_sample->DTS+mch->cache_sample->CTS_Offset > mch->max_cts)) {
		assert(mch->cache_sample->DTS > mch->prev_dts + mch->frame_cts_offset);
		CTS = mch->cache_sample->DTS + mch->cache_sample->CTS_Offset;
		mch->cache_sample->DTS = mch->prev_dts + mch->frame_cts_offset;
		mch->cache_sample->CTS_Offset = (u32) (CTS-mch->cache_sample->DTS);
	}
	if (mch->cache_sample->CTS_Offset)
		mch->max_cts = mch->cache_sample->DTS+mch->cache_sample->CTS_Offset;

	/*add cache*/
	gf_isom_add_sample(cache->mov, mch->track, 1, mch->cache_sample);
	assert(!mch->prev_dts || (mch->prev_dts < mch->cache_sample->DTS));
	mch->prev_dts = mch->cache_sample->DTS;
	mch->duration = MAX(mch->max_cts, mch->prev_dts);
	gf_isom_sample_del(&mch->cache_sample);

	/*store sample*/
	mch->cache_sample = gf_isom_sample_new();
	mch->cache_sample->IsRAP = sl_hdr->randomAccessPointFlag;
	mch->cache_sample->DTS = DTS + mch->frame_cts_offset;
	mch->cache_sample->CTS_Offset = (u32) (sl_hdr->compositionTimeStamp - mch->cache_seed_ts - DTS);
	mch->cache_sample->dataLength = data_size;
	mch->cache_sample->data = (char*)gf_malloc(sizeof(char)*data_size);
	memcpy(mch->cache_sample->data, data, sizeof(char)*data_size);
	return GF_OK;
}
Пример #6
0
GF_Err ISOR_ServiceCommand(GF_InputService *plug, GF_NetworkCommand *com)
{
    Double track_dur, media_dur;
    ISOMChannel *ch;
    ISOMReader *read;
    if (!plug || !plug->priv || !com) return GF_SERVICE_ERROR;
    read = (ISOMReader *) plug->priv;

    if (com->command_type==GF_NET_SERVICE_INFO) {
        u32 tag_len;
        const char *tag;
        if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_NAME, &tag, &tag_len)==GF_OK) com->info.name = tag;
        if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_ARTIST, &tag, &tag_len)==GF_OK) com->info.artist = tag;
        if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_ALBUM, &tag, &tag_len)==GF_OK) com->info.album = tag;
        if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_COMMENT, &tag, &tag_len)==GF_OK) com->info.comment = tag;
        if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_TRACK, &tag, &tag_len)==GF_OK) {
            com->info.track_info = (((tag[2]<<8)|tag[3]) << 16) | ((tag[4]<<8)|tag[5]);
        }
        if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_COMPOSER, &tag, &tag_len)==GF_OK) com->info.composer = tag;
        if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_WRITER, &tag, &tag_len)==GF_OK) com->info.writer = tag;
        if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_GENRE, &tag, &tag_len)==GF_OK) {
            if (tag[0]) {
                com->info.genre = 0;
            } else {
                com->info.genre = (tag[0]<<8) | tag[1];
            }
        }
        return GF_OK;
    }
    if (com->command_type==GF_NET_SERVICE_HAS_AUDIO) {
        u32 i, count;
        count = gf_isom_get_track_count(read->mov);
        for (i=0; i<count; i++) {
            if (gf_isom_get_media_type(read->mov, i+1) == GF_ISOM_MEDIA_AUDIO) return GF_OK;
        }
        return GF_NOT_SUPPORTED;
    }
    if (!com->base.on_channel) return GF_NOT_SUPPORTED;

    ch = isor_get_channel(read, com->base.on_channel);
    if (!ch) return GF_STREAM_NOT_FOUND;

    switch (com->command_type) {
    case GF_NET_CHAN_SET_PADDING:
        if (!ch->track) return GF_OK;
        gf_isom_set_sample_padding(read->mov, ch->track, com->pad.padding_bytes);
        return GF_OK;
    case GF_NET_CHAN_SET_PULL:
        ch->is_pulling = 1;
        return GF_OK;
    case GF_NET_CHAN_INTERACTIVE:
        return GF_OK;
    case GF_NET_CHAN_BUFFER:
        com->buffer.max = com->buffer.min = 0;
        return GF_OK;
    case GF_NET_CHAN_DURATION:
        if (!ch->track) {
            com->duration.duration = 0;
            return GF_OK;
        }
        ch->duration = gf_isom_get_track_duration(read->mov, ch->track);
        track_dur = (Double) (s64) ch->duration;
        track_dur /= read->time_scale;
        if (gf_isom_get_edit_segment_count(read->mov, ch->track)) {
            com->duration.duration = (Double) track_dur;
            ch->duration = (u32) (track_dur * ch->time_scale);
        } else {
            /*some file indicate a wrong TrackDuration, get the longest*/
            ch->duration = gf_isom_get_media_duration(read->mov, ch->track);
            media_dur = (Double) (s64) ch->duration;
            media_dur /= ch->time_scale;
            com->duration.duration = MAX(track_dur, media_dur);
        }
        return GF_OK;
    case GF_NET_CHAN_PLAY:
        if (!ch->is_pulling) return GF_NOT_SUPPORTED;
        assert(!ch->is_playing);
        isor_reset_reader(ch);
        ch->speed = com->play.speed;
        ch->start = ch->end = 0;
        if (com->play.speed>0) {
            if (com->play.start_range>=0) {
                ch->start = (u64) (s64) (com->play.start_range * ch->time_scale);
                ch->start = check_round(ch, ch->start, com->play.start_range, 1);
            }
            if (com->play.end_range >= com->play.start_range) {
                ch->end = (u64) (s64) (com->play.end_range*ch->time_scale);
                ch->end = check_round(ch, ch->end, com->play.end_range, 0);
            }
        } else if (com->play.speed<0) {
            if (com->play.end_range>=com->play.start_range) ch->start = (u64) (s64) (com->play.start_range * ch->time_scale);
            if (com->play.end_range >= 0) ch->end = (u64) (s64) (com->play.end_range*ch->time_scale);
        }
        ch->is_playing = 1;
        if (com->play.dash_segment_switch) ch->wait_for_segment_switch = 1;
        GF_LOG(GF_LOG_DEBUG, GF_LOG_NETWORK, ("[IsoMedia] Starting channel playback "LLD" to "LLD" (%g to %g)\n", ch->start, ch->end, com->play.start_range, com->play.end_range));
        return GF_OK;
    case GF_NET_CHAN_STOP:
        isor_reset_reader(ch);
        return GF_OK;

    /*nothing to do on MP4 for channel config*/
    case GF_NET_CHAN_CONFIG:
        return GF_OK;
    case GF_NET_CHAN_GET_PIXEL_AR:
        return gf_isom_get_pixel_aspect_ratio(read->mov, ch->track, 1, &com->par.hSpacing, &com->par.vSpacing);
    case GF_NET_CHAN_GET_DSI:
    {
        /*it may happen that there are conflicting config when using ESD URLs...*/
        GF_DecoderConfig *dcd = gf_isom_get_decoder_config(read->mov, ch->track, 1);
        com->get_dsi.dsi = NULL;
        com->get_dsi.dsi_len = 0;
        if (dcd) {
            if (dcd->decoderSpecificInfo) {
                com->get_dsi.dsi = dcd->decoderSpecificInfo->data;
                com->get_dsi.dsi_len = dcd->decoderSpecificInfo->dataLength;
                dcd->decoderSpecificInfo->data = NULL;
            }
            gf_odf_desc_del((GF_Descriptor *) dcd);
        }
    }
    return GF_OK;
    }
    return GF_NOT_SUPPORTED;
}
Пример #7
0
GF_Err ISOR_ConnectChannel(GF_InputService *plug, LPNETCHANNEL channel, const char *url, Bool upstream)
{
    u32 ESID;
    ISOMChannel *ch;
    GF_NetworkCommand com;
    u32 track;
    Bool is_esd_url;
    GF_Err e;
    ISOMReader *read;
    if (!plug || !plug->priv) return GF_SERVICE_ERROR;
    read = (ISOMReader *) plug->priv;

    track = 0;
    ch = NULL;
    is_esd_url = 0;
    e = GF_OK;
    if (upstream) {
        e = GF_ISOM_INVALID_FILE;
        goto exit;
    }
    if (!read->mov) return GF_SERVICE_ERROR;

    if (strstr(url, "ES_ID")) {
        sscanf(url, "ES_ID=%ud", &ESID);
    } else {
        /*handle url like mypath/myfile.mp4#trackID*/
        char *track_id = strrchr(url, '.');
        if (track_id) {
            track_id = strchr(url, '#');
            if (track_id) track_id ++;
        }
        is_esd_url = 1;

        ESID = 0;
        /*if only one track ok*/
        if (gf_isom_get_track_count(read->mov)==1) ESID = gf_isom_get_track_id(read->mov, 1);
        else if (track_id) {
            ESID = atoi(track_id);
            track = gf_isom_get_track_by_id(read->mov, (u32) ESID);
            if (!track) ESID = 0;
        }

    }
    if (!ESID) {
        e = GF_NOT_SUPPORTED;
        goto exit;
    }

    /*a channel cannot be open twice, it has to be closed before - NOTE a track is NOT a channel and the user can open
    several times the same track as long as a dedicated channel is used*/
    ch = isor_get_channel(read, channel);
    if (ch) {
        e = GF_SERVICE_ERROR;
        goto exit;
    }
    track = gf_isom_get_track_by_id(read->mov, (u32) ESID);
    if (!track) {
        e = GF_STREAM_NOT_FOUND;
        goto exit;
    }

    GF_SAFEALLOC(ch, ISOMChannel);
    ch->owner = read;
    ch->channel = channel;
    gf_list_add(read->channels, ch);
    ch->track = track;
    switch (gf_isom_get_media_type(ch->owner->mov, ch->track)) {
    case GF_ISOM_MEDIA_OCR:
        ch->streamType = GF_STREAM_OCR;
        break;
    case GF_ISOM_MEDIA_SCENE:
        ch->streamType = GF_STREAM_SCENE;
        break;
    }

    ch->has_edit_list = gf_isom_get_edit_segment_count(ch->owner->mov, ch->track) ? 1 : 0;
    ch->has_rap = (gf_isom_has_sync_points(ch->owner->mov, ch->track)==1) ? 1 : 0;
    ch->time_scale = gf_isom_get_media_timescale(ch->owner->mov, ch->track);

exit:
    gf_term_on_connect(read->service, channel, e);
    /*if esd url reconfig SL layer*/
    if (!e && is_esd_url) {
        GF_ESD *esd;
        memset(&com, 0, sizeof(GF_NetworkCommand));
        com.base.on_channel = channel;
        com.command_type = GF_NET_CHAN_RECONFIG;
        esd = gf_isom_get_esd(read->mov, ch->track, 1);
        if (esd) {
            memcpy(&com.cfg.sl_config, esd->slConfig, sizeof(GF_SLConfig));
            gf_odf_desc_del((GF_Descriptor *)esd);
        } else {
            com.cfg.sl_config.tag = GF_ODF_SLC_TAG;
            com.cfg.sl_config.timestampLength = 32;
            com.cfg.sl_config.timestampResolution = ch->time_scale;
            com.cfg.sl_config.useRandomAccessPointFlag = 1;
        }
        gf_term_on_command(read->service, &com, GF_OK);
    }
    if (!e && track && gf_isom_is_track_encrypted(read->mov, track)) {
        memset(&com, 0, sizeof(GF_NetworkCommand));
        com.base.on_channel = channel;
        com.command_type = GF_NET_CHAN_DRM_CFG;
        ch->is_encrypted = 1;
        if (gf_isom_is_ismacryp_media(read->mov, track, 1)) {
            gf_isom_get_ismacryp_info(read->mov, track, 1, NULL, &com.drm_cfg.scheme_type, &com.drm_cfg.scheme_version, &com.drm_cfg.scheme_uri, &com.drm_cfg.kms_uri, NULL, NULL, NULL);
            gf_term_on_command(read->service, &com, GF_OK);
        } else if (gf_isom_is_omadrm_media(read->mov, track, 1)) {
            gf_isom_get_omadrm_info(read->mov, track, 1, NULL, &com.drm_cfg.scheme_type, &com.drm_cfg.scheme_version, &com.drm_cfg.contentID, &com.drm_cfg.kms_uri, &com.drm_cfg.oma_drm_textual_headers, &com.drm_cfg.oma_drm_textual_headers_len, NULL, &com.drm_cfg.oma_drm_crypt_type, NULL, NULL, NULL);

            gf_media_get_file_hash(gf_isom_get_filename(read->mov), com.drm_cfg.hash);
            gf_term_on_command(read->service, &com, GF_OK);

        }
    }
    return e;
}
Пример #8
0
GF_Err ISOR_ServiceCommand(GF_InputService *plug, GF_NetworkCommand *com)
{
	Double track_dur, media_dur;
	ISOMChannel *ch;
	ISOMReader *read;
	u32 count, i;

	if (!plug || !plug->priv || !com) return GF_SERVICE_ERROR;
	read = (ISOMReader *) plug->priv;
	if (read->disconnected) return GF_OK;

	if (com->command_type==GF_NET_SERVICE_INFO) {
		u32 tag_len;
		const char *tag;
		if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_NAME, &tag, &tag_len)==GF_OK) com->info.name = tag;
		if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_ARTIST, &tag, &tag_len)==GF_OK) com->info.artist = tag;
		if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_ALBUM, &tag, &tag_len)==GF_OK) com->info.album = tag;
		if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_COMMENT, &tag, &tag_len)==GF_OK) com->info.comment = tag;
		if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_TRACK, &tag, &tag_len)==GF_OK) {
			com->info.track_info = (((tag[2]<<8)|tag[3]) << 16) | ((tag[4]<<8)|tag[5]);
		}
		if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_COMPOSER, &tag, &tag_len)==GF_OK) com->info.composer = tag;
		if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_WRITER, &tag, &tag_len)==GF_OK) com->info.writer = tag;
		if (gf_isom_apple_get_tag(read->mov, GF_ISOM_ITUNE_GENRE, &tag, &tag_len)==GF_OK) {
			if (tag[0]) {
				com->info.genre = 0;
			} else {
				com->info.genre = (tag[0]<<8) | tag[1];
			}
		}
		return GF_OK;
	}
	if (com->command_type==GF_NET_SERVICE_HAS_AUDIO) {
		u32 i, count;
		count = gf_isom_get_track_count(read->mov);
		for (i=0; i<count; i++) {
			if (gf_isom_get_media_type(read->mov, i+1) == GF_ISOM_MEDIA_AUDIO) return GF_OK;
		}
		return GF_NOT_SUPPORTED;
	}

	if (com->command_type == GF_NET_SERVICE_QUALITY_SWITCH)
	{
		count = gf_list_count(read->channels);
		for (i = 0; i < count; i++)
		{
			ch = (ISOMChannel *)gf_list_get(read->channels, i);
			if (gf_isom_has_scalable_layer(read->mov)) {
				ch->next_track = gf_channel_switch_quality(ch, read->mov, com->switch_quality.up);
			}
		}
		return GF_OK;
	}
	if (com->command_type == GF_NET_SERVICE_PROXY_DATA_RECEIVE) {
		isor_flush_data(read, 1, com->proxy_data.is_chunk);
		return GF_OK;
	}
	if (com->command_type == GF_NET_SERVICE_FLUSH_DATA) {
		if (read->nb_playing && plug->query_proxy)
			isor_flush_data(read, 0, 0);
		return GF_OK;
	}
	if (com->command_type == GF_NET_SERVICE_CAN_REVERSE_PLAYBACK) 
		return GF_OK;

	if (!com->base.on_channel) return GF_NOT_SUPPORTED;

	ch = isor_get_channel(read, com->base.on_channel);
	if (!ch) return GF_STREAM_NOT_FOUND;

	switch (com->command_type) {
	case GF_NET_CHAN_SET_PADDING:
		if (!ch->track) return GF_OK;
		gf_isom_set_sample_padding(read->mov, ch->track, com->pad.padding_bytes);
		return GF_OK;
	case GF_NET_CHAN_SET_PULL:
		//we don't pull in DASH base services, we flush as soon as we have a complete segment
#ifndef DASH_USE_PULL
		if (read->input->proxy_udta && !read->input->proxy_type)
			return GF_NOT_SUPPORTED;
#endif

		ch->is_pulling = 1;
		return GF_OK;
	case GF_NET_CHAN_INTERACTIVE:
		return GF_OK;
	case GF_NET_CHAN_BUFFER:
		//dash or HTTP, do rebuffer if not disabled
		if (plug->query_proxy) {
		} else if (read->dnload) {
			ch->buffer_min = com->buffer.min;
			ch->buffer_max = com->buffer.max;
		} else {
			com->buffer.max = com->buffer.min = 0;
		}
		return GF_OK;
	case GF_NET_CHAN_DURATION:
		if (!ch->track) {
			com->duration.duration = 0;
			return GF_OK;
		}
		ch->duration = gf_isom_get_track_duration(read->mov, ch->track);
		track_dur = (Double) (s64) ch->duration;
		track_dur /= read->time_scale;
		if (gf_isom_get_edit_segment_count(read->mov, ch->track)) {
			com->duration.duration = (Double) track_dur;
			ch->duration = (u32) (track_dur * ch->time_scale);
		} else {
			/*some file indicate a wrong TrackDuration, get the longest*/
			ch->duration = gf_isom_get_media_duration(read->mov, ch->track);
			media_dur = (Double) (s64) ch->duration;
			media_dur /= ch->time_scale;
			com->duration.duration = MAX(track_dur, media_dur);
		}
		return GF_OK;
	case GF_NET_CHAN_PLAY:

		gf_mx_p(read->segment_mutex);
		isor_reset_reader(ch);
		ch->speed = com->play.speed;
		read->reset_frag_state = 1;
		if (read->frag_type)
			read->frag_type = 1;
		gf_mx_v(read->segment_mutex);

		ch->start = ch->end = 0;
		if (com->play.speed>0) {
			if (com->play.start_range>=0) {
				ch->start = (u64) (s64) (com->play.start_range * ch->time_scale);
				ch->start = check_round(ch, ch->start, com->play.start_range, 1);
			}
			if (com->play.end_range >= com->play.start_range) {
				ch->end = (u64) (s64) (com->play.end_range*ch->time_scale);
				ch->end = check_round(ch, ch->end, com->play.end_range, 0);
			}
		} else if (com->play.speed<0) {
			Double end = com->play.end_range;
			if (end==-1) end = 0;
			ch->start = (u64) (s64) (com->play.start_range * ch->time_scale);
			if (end <= com->play.start_range)
				ch->end = (u64) (s64) (end  * ch->time_scale);
		}
		ch->is_playing = 1;
		if (com->play.dash_segment_switch) ch->wait_for_segment_switch = 1;
		GF_LOG(GF_LOG_DEBUG, GF_LOG_NETWORK, ("[IsoMedia] Starting channel playback "LLD" to "LLD" (%g to %g)\n", ch->start, ch->end, com->play.start_range, com->play.end_range));

		//and check buffer level on play request
		isor_check_buffer_level(read);
		read->nb_playing++;
		return GF_OK;
	case GF_NET_CHAN_STOP:
		if (read->nb_playing) read->nb_playing--;
		isor_reset_reader(ch);
		return GF_OK;

	case GF_NET_CHAN_SET_SPEED:
		gf_mx_p(read->segment_mutex);
		ch->speed = com->play.speed;
		gf_mx_v(read->segment_mutex);
		return GF_OK;
	/*nothing to do on MP4 for channel config*/
	case GF_NET_CHAN_CONFIG:
		return GF_OK;
	case GF_NET_CHAN_GET_PIXEL_AR:
		return gf_isom_get_pixel_aspect_ratio(read->mov, ch->track, 1, &com->par.hSpacing, &com->par.vSpacing);
	case GF_NET_CHAN_GET_DSI:
	{
		/*it may happen that there are conflicting config when using ESD URLs...*/
		GF_DecoderConfig *dcd = gf_isom_get_decoder_config(read->mov, ch->track, 1);
		com->get_dsi.dsi = NULL;
		com->get_dsi.dsi_len = 0;
		if (dcd) {
			if (dcd->decoderSpecificInfo) {
				com->get_dsi.dsi = dcd->decoderSpecificInfo->data;
				com->get_dsi.dsi_len = dcd->decoderSpecificInfo->dataLength;
				dcd->decoderSpecificInfo->data = NULL;
			}
			gf_odf_desc_del((GF_Descriptor *) dcd);
		}
		return GF_OK;
	}
	case GF_NET_CHAN_NALU_MODE:
		ch->nalu_extract_mode = GF_ISOM_NALU_EXTRACT_INBAND_PS_FLAG;
		ch->disable_seek = 1;
		//when this is set, we work in real scalable (eg N streams reassembled by the player) so only extract the layer. This wll need refinements if we plan to support
		//several scalable layers ...
		if (com->nalu_mode.extract_mode==1) {
			ch->nalu_extract_mode |= GF_ISOM_NALU_EXTRACT_ANNEXB_FLAG | GF_ISOM_NALU_EXTRACT_VDRD_FLAG | GF_ISOM_NALU_EXTRACT_LAYER_ONLY;
		}
		gf_isom_set_nalu_extract_mode(ch->owner->mov, ch->track, ch->nalu_extract_mode);
		break;
	default:
		break;
	}
	return GF_NOT_SUPPORTED;
}