descriptors.c

一个用于智能手机的多媒体库适合S60 WinCE的跨平台开发库

		if (hasSize) {
			cfg->pixelWidth = gf_bs_read_int(bs, 16);
			cfg->pixelHeight = gf_bs_read_int(bs, 16);
		}
		gf_bs_align(bs);
		if (gf_bs_get_size(bs) != gf_bs_get_position(bs))  e = GF_ODF_INVALID_DESCRIPTOR;
	}
	gf_bs_del(bs);
	return cfg;
}

/*special function for authoring - convert DSI to LASERConfig*/
GF_EXPORT
GF_Err gf_odf_get_laser_config(GF_DefaultDescriptor *dsi, GF_LASERConfig *cfg)
{
	u32 to_skip;
	GF_BitStream *bs;
	if (!dsi || !dsi->data || !dsi->dataLength || !cfg) return GF_BAD_PARAM;
	bs = gf_bs_new(dsi->data, dsi->dataLength, GF_BITSTREAM_READ);
	memset(cfg, 0, sizeof(GF_LASERConfig));
	cfg->tag = GF_ODF_LASER_CFG_TAG;
	cfg->profile = gf_bs_read_int(bs, 8);
	cfg->level = gf_bs_read_int(bs, 8);
	/*cfg->reserved = */gf_bs_read_int(bs, 3);	
	cfg->pointsCodec = gf_bs_read_int(bs, 2);	
	cfg->pathComponents = gf_bs_read_int(bs, 4);	
	cfg->fullRequestHost = gf_bs_read_int(bs, 1);	
	if (gf_bs_read_int(bs, 1)) cfg->time_resolution = gf_bs_read_int(bs, 16);
	else cfg->time_resolution = 1000;
	cfg->colorComponentBits = 1 + gf_bs_read_int(bs, 4);
	cfg->resolution = gf_bs_read_int(bs, 4);
	if (cfg->resolution>7) cfg->resolution -= 16;
	cfg->coord_bits = gf_bs_read_int(bs, 5);
	cfg->scale_bits_minus_coord_bits = gf_bs_read_int(bs, 4);
	cfg->newSceneIndicator = gf_bs_read_int(bs, 1);
	/*reserved2*/ gf_bs_read_int(bs, 3);
	cfg->extensionIDBits = gf_bs_read_int(bs, 4);
	/*hasExtConfig - we just ignore it*/
	if (gf_bs_read_int(bs, 1)) {
		to_skip = gf_bs_read_vluimsbf5(bs);
		while (to_skip) {
			gf_bs_read_int(bs, 8);
			to_skip--;
		}
	}
	/*hasExtension - we just ignore it*/
	if (gf_bs_read_int(bs, 1)) {
		to_skip = gf_bs_read_vluimsbf5(bs);
		while (to_skip) {
			gf_bs_read_int(bs, 8);
			to_skip--;
		}
	}
	gf_bs_del(bs);
	return GF_OK;
}

GF_EXPORT
GF_Err gf_odf_get_ui_config(GF_DefaultDescriptor *dsi, GF_UIConfig *cfg)
{
	u32 len, i;
	GF_BitStream *bs;
	if (!dsi || !dsi->data || !dsi->dataLength || !cfg) return GF_BAD_PARAM;
	memset(cfg, 0, sizeof(GF_UIConfig));
	cfg->tag = GF_ODF_UI_CFG_TAG;	
	bs = gf_bs_new(dsi->data, dsi->dataLength, GF_BITSTREAM_READ);
	len = gf_bs_read_int(bs, 8);
	cfg->deviceName = (char*)malloc(sizeof(char) * (len+1));
	for (i=0; i<len; i++) cfg->deviceName[i] = gf_bs_read_int(bs, 8);
	cfg->deviceName[i] = 0;

	if (!stricmp(cfg->deviceName, "StringSensor") && gf_bs_available(bs)) {
		cfg->termChar = gf_bs_read_int(bs, 8);
		cfg->delChar = gf_bs_read_int(bs, 8);
	}
	gf_bs_del(bs);
	return GF_OK;
}

GF_EXPORT
GF_Err gf_odf_encode_ui_config(GF_UIConfig *cfg, GF_DefaultDescriptor **out_dsi)
{
	u32 i, len;
	GF_BitStream *bs;
	GF_DefaultDescriptor *dsi;
	if (!out_dsi || (cfg->tag != GF_ODF_UI_CFG_TAG)) return GF_BAD_PARAM;

	*out_dsi = NULL;
	if (!cfg->deviceName) return GF_OK;

	bs = gf_bs_new(NULL, 0, GF_BITSTREAM_WRITE);
	len = strlen(cfg->deviceName);
	gf_bs_write_int(bs, len, 8);
	for (i=0; i<len; i++) gf_bs_write_int(bs, cfg->deviceName[i], 8);
	if (!stricmp(cfg->deviceName, "StringSensor")) {
		/*fixme - this should be UTF-8 chars*/
		if (cfg->delChar || cfg->termChar) {
			gf_bs_write_int(bs, cfg->termChar, 8);
			gf_bs_write_int(bs, cfg->delChar, 8);
		}
	}
	if (cfg->ui_data) gf_bs_write_data(bs, cfg->ui_data, cfg->ui_data_length);

	dsi = (GF_DefaultDescriptor *) gf_odf_desc_new(GF_ODF_DSI_TAG);
	gf_bs_get_content(bs, &dsi->data, &dsi->dataLength);
	gf_bs_del(bs);
	*out_dsi = dsi;
	return GF_OK;
}


GF_EXPORT
GF_AVCConfig *gf_odf_avc_cfg_new()
{
	GF_AVCConfig *cfg;
	GF_SAFEALLOC(cfg, GF_AVCConfig);
	if (!cfg) return NULL;
	cfg->sequenceParameterSets = gf_list_new();
	cfg->pictureParameterSets = gf_list_new();
	return cfg;
}

GF_EXPORT
void gf_odf_avc_cfg_del(GF_AVCConfig *cfg)
{
	if (!cfg) return;
	while (gf_list_count(cfg->sequenceParameterSets)) {
		GF_AVCConfigSlot *sl = (GF_AVCConfigSlot *)gf_list_get(cfg->sequenceParameterSets, 0);
		gf_list_rem(cfg->sequenceParameterSets, 0);
		if (sl->data) free(sl->data);
		free(sl);
	}
	gf_list_del(cfg->sequenceParameterSets);
	while (gf_list_count(cfg->pictureParameterSets)) {
		GF_AVCConfigSlot *sl = (GF_AVCConfigSlot *)gf_list_get(cfg->pictureParameterSets, 0);
		gf_list_rem(cfg->pictureParameterSets, 0);
		if (sl->data) free(sl->data);
		free(sl);
	}
	gf_list_del(cfg->pictureParameterSets);
	free(cfg);
}

GF_EXPORT
GF_Err gf_odf_avc_cfg_write(GF_AVCConfig *cfg, char **outData, u32 *outSize)
{
	u32 i, count;
	GF_BitStream *bs = gf_bs_new(NULL, 0, GF_BITSTREAM_WRITE);
	gf_bs_write_int(bs, cfg->configurationVersion, 8);
	gf_bs_write_int(bs, cfg->AVCProfileIndication , 8);
	gf_bs_write_int(bs, cfg->profile_compatibility, 8);
	gf_bs_write_int(bs, cfg->AVCLevelIndication, 8);
	gf_bs_write_int(bs, 0x3F, 6);
	gf_bs_write_int(bs, cfg->nal_unit_size - 1, 2);
	gf_bs_write_int(bs, 0x7, 3);
	count = gf_list_count(cfg->sequenceParameterSets);
	gf_bs_write_int(bs, count, 5);
	for (i=0; i<count; i++) {
		GF_AVCConfigSlot *sl = (GF_AVCConfigSlot *)gf_list_get(cfg->sequenceParameterSets, i);
		gf_bs_write_int(bs, sl->size, 16);
		gf_bs_write_data(bs, sl->data, sl->size);
	}
	count = gf_list_count(cfg->pictureParameterSets);
	gf_bs_write_int(bs, count, 8);
	for (i=0; i<count; i++) {
		GF_AVCConfigSlot *sl = (GF_AVCConfigSlot *)gf_list_get(cfg->pictureParameterSets, i);
		gf_bs_write_int(bs, sl->size, 16);
		gf_bs_write_data(bs, sl->data, sl->size);
	}

	*outSize = 0;
	*outData = NULL;
	gf_bs_get_content(bs, outData, outSize);
	gf_bs_del(bs);
	return GF_OK;
}

GF_EXPORT
GF_AVCConfig *gf_odf_avc_cfg_read(char *dsi, u32 dsi_size)
{
	u32 i, count;
	GF_AVCConfig *avcc = gf_odf_avc_cfg_new();
	GF_BitStream *bs = gf_bs_new(dsi, dsi_size, GF_BITSTREAM_READ);
	avcc->configurationVersion = gf_bs_read_int(bs, 8);
	avcc->AVCProfileIndication  = gf_bs_read_int(bs, 8);
	avcc->profile_compatibility = gf_bs_read_int(bs, 8);
	avcc->AVCLevelIndication  = gf_bs_read_int(bs, 8);
	gf_bs_read_int(bs, 6);
	avcc->nal_unit_size = 1 + gf_bs_read_int(bs, 2);
	gf_bs_read_int(bs, 3);
	count = gf_bs_read_int(bs, 5);
	for (i=0; i<count; i++) {
		GF_AVCConfigSlot *sl = (GF_AVCConfigSlot *)malloc(sizeof(GF_AVCConfigSlot));
		sl->size = gf_bs_read_int(bs, 16);
		sl->data = (char*)malloc(sizeof(char)*sl->size);
		gf_bs_read_data(bs, sl->data, sl->size);
		gf_list_add(avcc->sequenceParameterSets, sl);
	}
	count = gf_bs_read_int(bs, 8);
	for (i=0; i<count; i++) {
		GF_AVCConfigSlot *sl = (GF_AVCConfigSlot *)malloc(sizeof(GF_AVCConfigSlot));
		sl->size = gf_bs_read_int(bs, 16);
		sl->data = (char*)malloc(sizeof(char)*sl->size);
		gf_bs_read_data(bs, sl->data, sl->size);
		gf_list_add(avcc->pictureParameterSets, sl);
	}
	gf_bs_del(bs);
	return avcc;
}


GF_Descriptor *gf_odf_new_tx3g()
{
	GF_TextSampleDescriptor *newDesc = (GF_TextSampleDescriptor*) malloc(sizeof(GF_TextSampleDescriptor));
	if (!newDesc) return NULL;
	memset(newDesc, 0, sizeof(GF_TextSampleDescriptor));
	newDesc->tag = GF_ODF_TX3G_TAG;
	return (GF_Descriptor *) newDesc;
}
GF_Err gf_odf_del_tx3g(GF_TextSampleDescriptor *sd)
{
	u32 i;
	for (i=0; i<sd->font_count; i++) 
		if (sd->fonts[i].fontName) free(sd->fonts[i].fontName);
	free(sd->fonts);
	free(sd);
	return GF_OK;
}

/*TextConfig*/
GF_Descriptor *gf_odf_new_text_cfg()
{
	GF_TextConfig *newDesc = (GF_TextConfig*) malloc(sizeof(GF_TextConfig));
	if (!newDesc) return NULL;
	memset(newDesc, 0, sizeof(GF_TextConfig));
	newDesc->tag = GF_ODF_TEXT_CFG_TAG;
	newDesc->sample_descriptions = gf_list_new();
	newDesc->Base3GPPFormat = 0x10;
	newDesc->MPEGExtendedFormat = 0x10;
	newDesc->profileLevel = 0x10;
	newDesc->timescale = 1000;
	return (GF_Descriptor *) newDesc;
}

void ResetTextConfig(GF_TextConfig *desc)
{
	GF_List *bck;
	while (gf_list_count(desc->sample_descriptions)) {
		GF_TextSampleDescriptor *sd = (GF_TextSampleDescriptor *)gf_list_get(desc->sample_descriptions, 0);
		gf_list_rem(desc->sample_descriptions, 0);
		gf_odf_del_tx3g(sd);
	}
	bck = desc->sample_descriptions;
	memset(desc, 0, sizeof(GF_TextConfig));
	desc->tag = GF_ODF_TEXT_CFG_TAG;	
	desc->sample_descriptions = bck;
}

GF_Err gf_odf_del_text_cfg(GF_TextConfig *desc)
{
	ResetTextConfig(desc);
	gf_list_del(desc->sample_descriptions);
	free(desc);
	return GF_OK;
}

/*we need box parsing*/
#include <gpac/internal/isomedia_dev.h>
GF_EXPORT
GF_Err gf_odf_get_text_config(GF_DefaultDescriptor *dsi, u8 oti, GF_TextConfig *cfg)
{
	u32 i, j;
	Bool has_alt_format, has_sd;
	GF_Err e;
	GF_BitStream *bs;
	if (!dsi || !dsi->data || !dsi->dataLength || !cfg) return GF_BAD_PARAM;
	if (oti != 0x08) return GF_NOT_SUPPORTED;

	/*reset*/
	ResetTextConfig(cfg);
	bs = gf_bs_new(dsi->data, dsi->dataLength, GF_BITSTREAM_READ);

	e = GF_OK;
	cfg->Base3GPPFormat = gf_bs_read_int(bs, 8);
	cfg->MPEGExtendedFormat = gf_bs_read_int(bs, 8);
	cfg->profileLevel = gf_bs_read_int(bs, 8);
	cfg->timescale = gf_bs_read_int(bs, 24);
	has_alt_format = gf_bs_read_int(bs, 1);
	cfg->sampleDescriptionFlags = gf_bs_read_int(bs, 2);
	has_sd = gf_bs_read_int(bs, 1);
	cfg->has_vid_info = gf_bs_read_int(bs, 1);
	gf_bs_read_int(bs, 3);
	cfg->layer = gf_bs_read_int(bs, 8);
	cfg->text_width = gf_bs_read_int(bs, 16);
	cfg->text_height = gf_bs_read_int(bs, 16);
	if (has_alt_format) {
		cfg->nb_compatible_formats = gf_bs_read_int(bs, 8);
		for (i=0; i<cfg->nb_compatible_formats; i++) cfg->compatible_formats[i] = gf_bs_read_int(bs, 8);
	}
	if (has_sd) {
		u8 sample_index;
		GF_TextSampleDescriptor *txdesc;
		GF_TextSampleEntryBox *a;
		s32 avail;
		u32 nb_desc = gf_bs_read_int(bs, 8);

		/*parse TTU[5]s*/
		avail = (s32) gf_bs_available(bs);
		for (i=0; i<nb_desc; i++) {
			sample_index = gf_bs_read_int(bs, 8);
			avail -= 1;
			e = gf_isom_parse_box((GF_Box **) &a, bs);
			if (e) goto exit;
			avail -= (s32) a->size;

			if (avail<0) {
				e = GF_NON_COMPLIANT_BITSTREAM;
				goto exit;
			}
			txdesc = (GF_TextSampleDescriptor *)malloc(sizeof(GF_TextSampleDescriptor));
			txdesc->sample_index = sample_index;
			txdesc->displayFlags = a->displayFlags;
			txdesc->back_color = a->back_color;
			txdesc->default_pos = a->default_box;
			txdesc->default_style = a->default_style;
			txdesc->vert_justif = a->vertical_justification;
			txdesc->horiz_justif = a->horizontal_justification;
			txdesc->font_count = a->font_table ? a->font_table->entry_count : 0;
			if (txdesc->font_count) {
				txdesc->fonts = (GF_FontRecord*)malloc(sizeof(GF_FontRecord)*txdesc->font_count);
				for (j=0; j<txdesc->font_count; j++) {
					txdesc->fonts[j].fontID = a->font_table->fonts[j].fontID;
					txdesc->fonts[j].fontName = a->font_table->fonts[j].fontName ? strdup(a->font_table->fonts[j].fontName) : NULL;
				}
			}
			gf_list_add(cfg->sample_descriptions, txdesc);
			gf_isom_box_del((GF_Box *)a);
		}
	}
	if (cfg->has_vid_info) {
		cfg->video_width = gf_bs_read_int(bs, 16);
		cfg->video_height = gf_bs_read_int(bs, 16);
		cfg->horiz_offset = gf_bs_read_int(bs, 16);
		cfg->vert_offset = gf_bs_read_int(bs, 16);
	}
	
exit:
	gf_bs_del(bs);
	if (e) ResetTextConfig(cfg);
	return e;
}