diff options
Diffstat (limited to 'faad2/src/common/mp4ff/mp4tagupdate.c')
| -rw-r--r-- | faad2/src/common/mp4ff/mp4tagupdate.c | 656 |
1 files changed, 656 insertions, 0 deletions
diff --git a/faad2/src/common/mp4ff/mp4tagupdate.c b/faad2/src/common/mp4ff/mp4tagupdate.c new file mode 100644 index 0000000..ae29e12 --- /dev/null +++ b/faad2/src/common/mp4ff/mp4tagupdate.c @@ -0,0 +1,656 @@ +#include <stdlib.h>
+#include <string.h>
+#include "mp4ffint.h"
+
+#ifdef USE_TAGGING
+
+static uint32_t fix_byte_order_32(uint32_t src)
+{
+ uint32_t result;
+ uint32_t a, b, c, d;
+ int8_t data[4];
+
+ memcpy(data,&src,sizeof(src));
+ a = (uint8_t)data[0];
+ b = (uint8_t)data[1];
+ c = (uint8_t)data[2];
+ d = (uint8_t)data[3];
+
+ result = (a<<24) | (b<<16) | (c<<8) | d;
+ return (uint32_t)result;
+}
+
+static uint16_t fix_byte_order_16(uint16_t src)
+{
+ uint16_t result;
+ uint16_t a, b;
+ int8_t data[2];
+
+ memcpy(data,&src,sizeof(src));
+ a = (uint8_t)data[0];
+ b = (uint8_t)data[1];
+
+ result = (a<<8) | b;
+ return (uint16_t)result;
+}
+
+
+typedef struct
+{
+ void * data;
+ unsigned written;
+ unsigned allocated;
+ unsigned error;
+} membuffer;
+
+unsigned membuffer_write(membuffer * buf,const void * ptr,unsigned bytes)
+{
+ unsigned dest_size = buf->written + bytes;
+
+ if (buf->error) return 0;
+ if (dest_size > buf->allocated)
+ {
+ do
+ {
+ buf->allocated <<= 1;
+ } while(dest_size > buf->allocated);
+
+ {
+ void * newptr = realloc(buf->data,buf->allocated);
+ if (newptr==0)
+ {
+ free(buf->data);
+ buf->data = 0;
+ buf->error = 1;
+ return 0;
+ }
+ buf->data = newptr;
+ }
+ }
+
+ if (ptr) memcpy((char*)buf->data + buf->written,ptr,bytes);
+ buf->written += bytes;
+ return bytes;
+}
+
+#define membuffer_write_data membuffer_write
+
+unsigned membuffer_write_int32(membuffer * buf,uint32_t data)
+{
+ uint8_t temp[4] = {(uint8_t)(data>>24),(uint8_t)(data>>16),(uint8_t)(data>>8),(uint8_t)data};
+ return membuffer_write_data(buf,temp,4);
+}
+
+unsigned membuffer_write_int24(membuffer * buf,uint32_t data)
+{
+ uint8_t temp[3] = {(uint8_t)(data>>16),(uint8_t)(data>>8),(uint8_t)data};
+ return membuffer_write_data(buf,temp,3);
+}
+
+unsigned membuffer_write_int16(membuffer * buf,uint16_t data)
+{
+ uint8_t temp[2] = {(uint8_t)(data>>8),(uint8_t)data};
+ return membuffer_write_data(buf,temp,2);
+}
+
+unsigned membuffer_write_atom_name(membuffer * buf,const char * data)
+{
+ return membuffer_write_data(buf,data,4)==4 ? 1 : 0;
+}
+
+void membuffer_write_atom(membuffer * buf,const char * name,unsigned size,const void * data)
+{
+ membuffer_write_int32(buf,size + 8);
+ membuffer_write_atom_name(buf,name);
+ membuffer_write_data(buf,data,size);
+}
+
+unsigned membuffer_write_string(membuffer * buf,const char * data)
+{
+ return membuffer_write_data(buf,data,strlen(data));
+}
+
+unsigned membuffer_write_int8(membuffer * buf,uint8_t data)
+{
+ return membuffer_write_data(buf,&data,1);
+}
+
+void * membuffer_get_ptr(const membuffer * buf)
+{
+ return buf->data;
+}
+
+unsigned membuffer_get_size(const membuffer * buf)
+{
+ return buf->written;
+}
+
+unsigned membuffer_error(const membuffer * buf)
+{
+ return buf->error;
+}
+
+void membuffer_set_error(membuffer * buf) {buf->error = 1;}
+
+unsigned membuffer_transfer_from_file(membuffer * buf,mp4ff_t * src,unsigned bytes)
+{
+ unsigned oldsize;
+ void * bufptr;
+
+ oldsize = membuffer_get_size(buf);
+ if (membuffer_write_data(buf,0,bytes) != bytes) return 0;
+
+ bufptr = membuffer_get_ptr(buf);
+ if (bufptr==0) return 0;
+
+ if ((unsigned)mp4ff_read_data(src,(char*)bufptr + oldsize,bytes)!=bytes)
+ {
+ membuffer_set_error(buf);
+ return 0;
+ }
+
+ return bytes;
+}
+
+
+membuffer * membuffer_create()
+{
+ const unsigned initial_size = 256;
+
+ membuffer * buf = (membuffer *) malloc(sizeof(membuffer));
+ buf->data = malloc(initial_size);
+ buf->written = 0;
+ buf->allocated = initial_size;
+ buf->error = buf->data == 0 ? 1 : 0;
+
+ return buf;
+}
+
+void membuffer_free(membuffer * buf)
+{
+ if (buf->data) free(buf->data);
+ free(buf);
+}
+
+void * membuffer_detach(membuffer * buf)
+{
+ void * ret;
+
+ if (buf->error) return 0;
+
+ ret = realloc(buf->data,buf->written);
+
+ if (ret == 0) free(buf->data);
+
+ buf->data = 0;
+ buf->error = 1;
+
+ return ret;
+}
+
+#if 0
+/* metadata tag structure */
+typedef struct
+{
+ char *item;
+ char *value;
+} mp4ff_tag_t;
+
+/* metadata list structure */
+typedef struct
+{
+ mp4ff_tag_t *tags;
+ uint32_t count;
+} mp4ff_metadata_t;
+#endif
+
+typedef struct
+{
+ const char * atom;
+ const char * name;
+} stdmeta_entry;
+
+static stdmeta_entry stdmetas[] =
+{
+ {"\xA9" "nam","title"},
+ {"\xA9" "ART","artist"},
+ {"\xA9" "wrt","writer"},
+ {"\xA9" "alb","album"},
+ {"\xA9" "day","date"},
+ {"\xA9" "too","tool"},
+ {"\xA9" "cmt","comment"},
+// {"\xA9" "gen","genre"},
+ {"cpil","compilation"},
+// {"trkn","track"},
+// {"disk","disc"},
+// {"gnre","genre"},
+ {"covr","cover"},
+ /* added by AJS */
+ {"aART","album_artist"},
+};
+
+
+static const char* find_standard_meta(const char * name) //returns atom name if found, 0 if not
+{
+ unsigned n;
+ for(n=0;n<sizeof(stdmetas)/sizeof(stdmetas[0]);n++)
+ {
+ if (!stricmp(name,stdmetas[n].name)) return stdmetas[n].atom;
+ }
+ return 0;
+}
+
+static void membuffer_write_track_tag(membuffer * buf,const char * name,uint32_t index,uint32_t total)
+{
+ membuffer_write_int32(buf,8 /*atom header*/ + 8 /*data atom header*/ + 8 /*flags + reserved*/ + 8 /*actual data*/ );
+ membuffer_write_atom_name(buf,name);
+ membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + 8 /*actual data*/ );
+ membuffer_write_atom_name(buf,"data");
+ membuffer_write_int32(buf,0);//flags
+ membuffer_write_int32(buf,0);//reserved
+ membuffer_write_int16(buf,0);
+ membuffer_write_int16(buf,(uint16_t)index);//track number
+ membuffer_write_int16(buf,(uint16_t)total);//total tracks
+ membuffer_write_int16(buf,0);
+}
+
+static void membuffer_write_int16_tag(membuffer * buf,const char * name,uint16_t value)
+{
+ membuffer_write_int32(buf,8 /*atom header*/ + 8 /*data atom header*/ + 8 /*flags + reserved*/ + 2 /*actual data*/ );
+ membuffer_write_atom_name(buf,name);
+ membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + 2 /*actual data*/ );
+ membuffer_write_atom_name(buf,"data");
+ membuffer_write_int32(buf,0);//flags
+ membuffer_write_int32(buf,0);//reserved
+ membuffer_write_int16(buf,value);//value
+}
+
+static void membuffer_write_std_tag(membuffer * buf,const char * name,const char * value)
+{
+ /* added by AJS */
+ uint32_t flags = 1;
+
+ /* special check for compilation flag */
+ if ( strcmp(name, "cpil") == 0)
+ {
+ flags = 21;
+ }
+
+ membuffer_write_int32(buf,8 /*atom header*/ + 8 /*data atom header*/ + 8 /*flags + reserved*/ + strlen(value) );
+ membuffer_write_atom_name(buf,name);
+ membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + strlen(value));
+ membuffer_write_atom_name(buf,"data");
+ membuffer_write_int32(buf,flags);//flags
+ membuffer_write_int32(buf,0);//reserved
+ membuffer_write_data(buf,value,strlen(value));
+}
+
+static void membuffer_write_custom_tag(membuffer * buf,const char * name,const char * value)
+{
+ membuffer_write_int32(buf,8 /*atom header*/ + 0x1C /*weirdo itunes atom*/ + 12 /*name atom header*/ + strlen(name) + 16 /*data atom header + flags*/ + strlen(value) );
+ membuffer_write_atom_name(buf,"----");
+ membuffer_write_int32(buf,0x1C);//weirdo itunes atom
+ membuffer_write_atom_name(buf,"mean");
+ membuffer_write_int32(buf,0);
+ membuffer_write_data(buf,"com.apple.iTunes",16);
+ membuffer_write_int32(buf,12 + strlen(name));
+ membuffer_write_atom_name(buf,"name");
+ membuffer_write_int32(buf,0);
+ membuffer_write_data(buf,name,strlen(name));
+ membuffer_write_int32(buf,8 /*data atom header*/ + 8 /*flags + reserved*/ + strlen(value));
+ membuffer_write_atom_name(buf,"data");
+ membuffer_write_int32(buf,1);//flags
+ membuffer_write_int32(buf,0);//reserved
+ membuffer_write_data(buf,value,strlen(value));
+
+}
+
+static uint32_t myatoi(const char * param)
+{
+ return param ? atoi(param) : 0;
+}
+
+static uint32_t create_ilst(const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size)
+{
+ membuffer * buf = membuffer_create();
+ unsigned metaptr;
+ char * mask = (char*)malloc(data->count);
+ memset(mask,0,data->count);
+
+ {
+ const char * tracknumber_ptr = 0, * totaltracks_ptr = 0;
+ const char * discnumber_ptr = 0, * totaldiscs_ptr = 0;
+ const char * genre_ptr = 0, * tempo_ptr = 0;
+ for(metaptr = 0; metaptr < data->count; metaptr++)
+ {
+ mp4ff_tag_t * tag = &data->tags[metaptr];
+ if (!stricmp(tag->item,"tracknumber") || !stricmp(tag->item,"track"))
+ {
+ if (tracknumber_ptr==0) tracknumber_ptr = tag->value;
+ mask[metaptr] = 1;
+ }
+ else if (!stricmp(tag->item,"totaltracks"))
+ {
+ if (totaltracks_ptr==0) totaltracks_ptr = tag->value;
+ mask[metaptr] = 1;
+ }
+ else if (!stricmp(tag->item,"discnumber") || !stricmp(tag->item,"disc"))
+ {
+ if (discnumber_ptr==0) discnumber_ptr = tag->value;
+ mask[metaptr] = 1;
+ }
+ else if (!stricmp(tag->item,"totaldiscs"))
+ {
+ if (totaldiscs_ptr==0) totaldiscs_ptr = tag->value;
+ mask[metaptr] = 1;
+ }
+ else if (!stricmp(tag->item,"genre"))
+ {
+ if (genre_ptr==0) genre_ptr = tag->value;
+ mask[metaptr] = 1;
+ }
+ else if (!stricmp(tag->item,"tempo"))
+ {
+ if (tempo_ptr==0) tempo_ptr = tag->value;
+ mask[metaptr] = 1;
+ }
+
+ }
+
+ if (tracknumber_ptr) membuffer_write_track_tag(buf,"trkn",myatoi(tracknumber_ptr),myatoi(totaltracks_ptr));
+ if (discnumber_ptr) membuffer_write_track_tag(buf,"disk",myatoi(discnumber_ptr),myatoi(totaldiscs_ptr));
+ if (tempo_ptr) membuffer_write_int16_tag(buf,"tmpo",(uint16_t)myatoi(tempo_ptr));
+
+ if (genre_ptr)
+ {
+ uint32_t index = mp4ff_meta_genre_to_index(genre_ptr);
+ if (index==0)
+ membuffer_write_std_tag(buf,"©gen",genre_ptr);
+ else
+ membuffer_write_int16_tag(buf,"gnre",(uint16_t)index);
+ }
+ }
+
+ for(metaptr = 0; metaptr < data->count; metaptr++)
+ {
+ if (!mask[metaptr])
+ {
+ mp4ff_tag_t * tag = &data->tags[metaptr];
+ const char * std_meta_atom = find_standard_meta(tag->item);
+ if (std_meta_atom)
+ {
+ membuffer_write_std_tag(buf,std_meta_atom,tag->value);
+ }
+ else
+ {
+ membuffer_write_custom_tag(buf,tag->item,tag->value);
+ }
+ }
+ }
+
+ free(mask);
+
+ if (membuffer_error(buf))
+ {
+ membuffer_free(buf);
+ return 0;
+ }
+
+ *out_size = membuffer_get_size(buf);
+ *out_buffer = membuffer_detach(buf);
+ membuffer_free(buf);
+
+ return 1;
+}
+
+static uint32_t find_atom(mp4ff_t * f,uint64_t base,uint32_t size,const char * name)
+{
+ uint32_t remaining = size;
+ uint64_t atom_offset = base;
+ for(;;)
+ {
+ char atom_name[4];
+ uint32_t atom_size;
+
+ mp4ff_set_position(f,atom_offset);
+
+ if (remaining < 8) break;
+ atom_size = mp4ff_read_int32(f);
+ if (atom_size > remaining || atom_size < 8) break;
+ mp4ff_read_data(f,atom_name,4);
+
+ if (!memcmp(atom_name,name,4))
+ {
+ mp4ff_set_position(f,atom_offset);
+ return 1;
+ }
+
+ remaining -= atom_size;
+ atom_offset += atom_size;
+ }
+ return 0;
+}
+
+static uint32_t find_atom_v2(mp4ff_t * f,uint64_t base,uint32_t size,const char * name,uint32_t extraheaders,const char * name_inside)
+{
+ uint64_t first_base = (uint64_t)(-1);
+ while(find_atom(f,base,size,name))//try to find atom <name> with atom <name_inside> in it
+ {
+ uint64_t mybase = mp4ff_position(f);
+ uint32_t mysize = mp4ff_read_int32(f);
+
+ if (first_base == (uint64_t)(-1)) first_base = mybase;
+
+ if (mysize < 8 + extraheaders) break;
+
+ if (find_atom(f,mybase+(8+extraheaders),mysize-(8+extraheaders),name_inside))
+ {
+ mp4ff_set_position(f,mybase);
+ return 2;
+ }
+ base += mysize;
+ if (size<=mysize) {size=0;break;}
+ size -= mysize;
+ }
+
+ if (first_base != (uint64_t)(-1))//wanted atom inside not found
+ {
+ mp4ff_set_position(f,first_base);
+ return 1;
+ }
+ else return 0;
+}
+
+static uint32_t create_meta(const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size)
+{
+ membuffer * buf;
+ uint32_t ilst_size;
+ void * ilst_buffer;
+
+ if (!create_ilst(data,&ilst_buffer,&ilst_size)) return 0;
+
+ buf = membuffer_create();
+
+ membuffer_write_int32(buf,0);
+ membuffer_write_atom(buf,"ilst",ilst_size,ilst_buffer);
+ free(ilst_buffer);
+
+ *out_size = membuffer_get_size(buf);
+ *out_buffer = membuffer_detach(buf);
+ membuffer_free(buf);
+ return 1;
+}
+
+static uint32_t create_udta(const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size)
+{
+ membuffer * buf;
+ uint32_t meta_size;
+ void * meta_buffer;
+
+ if (!create_meta(data,&meta_buffer,&meta_size)) return 0;
+
+ buf = membuffer_create();
+
+ membuffer_write_atom(buf,"meta",meta_size,meta_buffer);
+
+ free(meta_buffer);
+
+ *out_size = membuffer_get_size(buf);
+ *out_buffer = membuffer_detach(buf);
+ membuffer_free(buf);
+ return 1;
+}
+
+static uint32_t modify_moov(mp4ff_t * f,const mp4ff_metadata_t * data,void ** out_buffer,uint32_t * out_size)
+{
+ uint64_t total_base = f->moov_offset + 8;
+ uint32_t total_size = (uint32_t)(f->moov_size - 8);
+
+ uint64_t udta_offset,meta_offset,ilst_offset;
+ uint32_t udta_size, meta_size, ilst_size;
+
+ uint32_t new_ilst_size;
+ void * new_ilst_buffer;
+
+ uint8_t * p_out;
+ int32_t size_delta;
+
+
+ if (!find_atom_v2(f,total_base,total_size,"udta",0,"meta"))
+ {
+ membuffer * buf;
+ void * new_udta_buffer;
+ uint32_t new_udta_size;
+ if (!create_udta(data,&new_udta_buffer,&new_udta_size)) return 0;
+
+ buf = membuffer_create();
+ mp4ff_set_position(f,total_base);
+ membuffer_transfer_from_file(buf,f,total_size);
+
+ membuffer_write_atom(buf,"udta",new_udta_size,new_udta_buffer);
+
+ free(new_udta_buffer);
+
+ *out_size = membuffer_get_size(buf);
+ *out_buffer = membuffer_detach(buf);
+ membuffer_free(buf);
+ return 1;
+ }
+ else
+ {
+ udta_offset = mp4ff_position(f);
+ udta_size = mp4ff_read_int32(f);
+ if (!find_atom_v2(f,udta_offset+8,udta_size-8,"meta",4,"ilst"))
+ {
+ membuffer * buf;
+ void * new_meta_buffer;
+ uint32_t new_meta_size;
+ if (!create_meta(data,&new_meta_buffer,&new_meta_size)) return 0;
+
+ buf = membuffer_create();
+ mp4ff_set_position(f,total_base);
+ membuffer_transfer_from_file(buf,f,(uint32_t)(udta_offset - total_base));
+
+ membuffer_write_int32(buf,udta_size + 8 + new_meta_size);
+ membuffer_write_atom_name(buf,"udta");
+ membuffer_transfer_from_file(buf,f,udta_size);
+
+ membuffer_write_atom(buf,"meta",new_meta_size,new_meta_buffer);
+ free(new_meta_buffer);
+
+ *out_size = membuffer_get_size(buf);
+ *out_buffer = membuffer_detach(buf);
+ membuffer_free(buf);
+ return 1;
+ }
+ meta_offset = mp4ff_position(f);
+ meta_size = mp4ff_read_int32(f);
+ if (!find_atom(f,meta_offset+12,meta_size-12,"ilst")) return 0;//shouldn't happen, find_atom_v2 above takes care of it
+ ilst_offset = mp4ff_position(f);
+ ilst_size = mp4ff_read_int32(f);
+
+ if (!create_ilst(data,&new_ilst_buffer,&new_ilst_size)) return 0;
+
+ size_delta = new_ilst_size - (ilst_size - 8);
+
+ *out_size = total_size + size_delta;
+ *out_buffer = malloc(*out_size);
+ if (*out_buffer == 0)
+ {
+ free(new_ilst_buffer);
+ return 0;
+ }
+
+ p_out = (uint8_t*)*out_buffer;
+
+ mp4ff_set_position(f,total_base);
+ mp4ff_read_data(f,p_out,(uint32_t)(udta_offset - total_base )); p_out += (uint32_t)(udta_offset - total_base );
+ *(uint32_t*)p_out = fix_byte_order_32(mp4ff_read_int32(f) + size_delta); p_out += 4;
+ mp4ff_read_data(f,p_out,4); p_out += 4;
+ mp4ff_read_data(f,p_out,(uint32_t)(meta_offset - udta_offset - 8)); p_out += (uint32_t)(meta_offset - udta_offset - 8);
+ *(uint32_t*)p_out = fix_byte_order_32(mp4ff_read_int32(f) + size_delta); p_out += 4;
+ mp4ff_read_data(f,p_out,4); p_out += 4;
+ mp4ff_read_data(f,p_out,(uint32_t)(ilst_offset - meta_offset - 8)); p_out += (uint32_t)(ilst_offset - meta_offset - 8);
+ *(uint32_t*)p_out = fix_byte_order_32(mp4ff_read_int32(f) + size_delta); p_out += 4;
+ mp4ff_read_data(f,p_out,4); p_out += 4;
+
+ memcpy(p_out,new_ilst_buffer,new_ilst_size);
+ p_out += new_ilst_size;
+
+ mp4ff_set_position(f,ilst_offset + ilst_size);
+ mp4ff_read_data(f,p_out,(uint32_t)(total_size - (ilst_offset - total_base) - ilst_size));
+
+ free(new_ilst_buffer);
+ }
+ return 1;
+
+}
+
+int32_t mp4ff_meta_update(mp4ff_callback_t *f,const mp4ff_metadata_t * data)
+{
+ void * new_moov_data;
+ uint32_t new_moov_size;
+
+ mp4ff_t *ff = malloc(sizeof(mp4ff_t));
+
+ memset(ff, 0, sizeof(mp4ff_t));
+ ff->stream = f;
+ mp4ff_set_position(ff,0);
+
+ parse_atoms(ff,1);
+
+
+ if (!modify_moov(ff,data,&new_moov_data,&new_moov_size))
+ {
+ mp4ff_close(ff);
+ return 0;
+ }
+
+ /* copy moov atom to end of the file */
+ if (ff->last_atom != ATOM_MOOV)
+ {
+ char *free_data = "free";
+
+ /* rename old moov to free */
+ mp4ff_set_position(ff, ff->moov_offset + 4);
+ mp4ff_write_data(ff, free_data, 4);
+
+ mp4ff_set_position(ff, ff->file_size);
+ mp4ff_write_int32(ff,new_moov_size + 8);
+ mp4ff_write_data(ff,"moov",4);
+ mp4ff_write_data(ff, new_moov_data, new_moov_size);
+ }
+ else
+ {
+ mp4ff_set_position(ff, ff->moov_offset);
+ mp4ff_write_int32(ff,new_moov_size + 8);
+ mp4ff_write_data(ff,"moov",4);
+ mp4ff_write_data(ff, new_moov_data, new_moov_size);
+ }
+
+ mp4ff_truncate(ff);
+
+ mp4ff_close(ff);
+ return 1;
+}
+#endif
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