aboutsummaryrefslogtreecommitdiffstats
path: root/mp4ff/mp4atom.c
diff options
context:
space:
mode:
Diffstat (limited to 'mp4ff/mp4atom.c')
-rw-r--r--mp4ff/mp4atom.c781
1 files changed, 781 insertions, 0 deletions
diff --git a/mp4ff/mp4atom.c b/mp4ff/mp4atom.c
new file mode 100644
index 000000000..b75a3da7f
--- /dev/null
+++ b/mp4ff/mp4atom.c
@@ -0,0 +1,781 @@
+/*
+** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
+** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+**
+** Any non-GPL usage of this software or parts of this software is strictly
+** forbidden.
+**
+** Commercial non-GPL licensing of this software is possible.
+** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
+**
+** $Id: mp4atom.c,v 1.17 2004/01/11 15:52:18 menno Exp $
+**/
+
+#include <stdlib.h>
+#include "mp4ffint.h"
+
+#include "drms.h"
+
+/* parse atom header size */
+static int32_t mp4ff_atom_get_size(const int8_t *data)
+{
+ uint32_t result;
+ uint32_t a, b, c, d;
+
+ 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;
+ //if (result > 0 && result < 8) result = 8;
+
+ return (int32_t)result;
+}
+
+/* comnapre 2 atom names, returns 1 for equal, 0 for unequal */
+static int32_t mp4ff_atom_compare(const int8_t a1, const int8_t b1, const int8_t c1, const int8_t d1,
+ const int8_t a2, const int8_t b2, const int8_t c2, const int8_t d2)
+{
+ if (a1 == a2 && b1 == b2 && c1 == c2 && d1 == d2)
+ return 1;
+ else
+ return 0;
+}
+
+static uint8_t mp4ff_atom_name_to_type(const int8_t a, const int8_t b,
+ const int8_t c, const int8_t d)
+{
+ if (a == 'm')
+ {
+ if (mp4ff_atom_compare(a,b,c,d, 'm','o','o','v'))
+ return ATOM_MOOV;
+ else if (mp4ff_atom_compare(a,b,c,d, 'm','i','n','f'))
+ return ATOM_MINF;
+ else if (mp4ff_atom_compare(a,b,c,d, 'm','d','i','a'))
+ return ATOM_MDIA;
+ else if (mp4ff_atom_compare(a,b,c,d, 'm','d','a','t'))
+ return ATOM_MDAT;
+ else if (mp4ff_atom_compare(a,b,c,d, 'm','d','h','d'))
+ return ATOM_MDHD;
+ else if (mp4ff_atom_compare(a,b,c,d, 'm','v','h','d'))
+ return ATOM_MVHD;
+ else if (mp4ff_atom_compare(a,b,c,d, 'm','p','4','a'))
+ return ATOM_MP4A;
+ else if (mp4ff_atom_compare(a,b,c,d, 'm','p','4','v'))
+ return ATOM_MP4V;
+ else if (mp4ff_atom_compare(a,b,c,d, 'm','p','4','s'))
+ return ATOM_MP4S;
+ else if (mp4ff_atom_compare(a,b,c,d, 'm','e','t','a'))
+ return ATOM_META;
+ } else if (a == 't') {
+ if (mp4ff_atom_compare(a,b,c,d, 't','r','a','k'))
+ return ATOM_TRAK;
+ else if (mp4ff_atom_compare(a,b,c,d, 't','k','h','d'))
+ return ATOM_TKHD;
+ else if (mp4ff_atom_compare(a,b,c,d, 't','r','e','f'))
+ return ATOM_TREF;
+ else if (mp4ff_atom_compare(a,b,c,d, 't','r','k','n'))
+ return ATOM_TRACK;
+ else if (mp4ff_atom_compare(a,b,c,d, 't','m','p','o'))
+ return ATOM_TEMPO;
+ } else if (a == 's') {
+ if (mp4ff_atom_compare(a,b,c,d, 's','t','b','l'))
+ return ATOM_STBL;
+ else if (mp4ff_atom_compare(a,b,c,d, 's','m','h','d'))
+ return ATOM_SMHD;
+ else if (mp4ff_atom_compare(a,b,c,d, 's','t','s','d'))
+ return ATOM_STSD;
+ else if (mp4ff_atom_compare(a,b,c,d, 's','t','t','s'))
+ return ATOM_STTS;
+ else if (mp4ff_atom_compare(a,b,c,d, 's','t','c','o'))
+ return ATOM_STCO;
+ else if (mp4ff_atom_compare(a,b,c,d, 's','t','s','c'))
+ return ATOM_STSC;
+ else if (mp4ff_atom_compare(a,b,c,d, 's','t','s','z'))
+ return ATOM_STSZ;
+ else if (mp4ff_atom_compare(a,b,c,d, 's','t','z','2'))
+ return ATOM_STZ2;
+ else if (mp4ff_atom_compare(a,b,c,d, 's','k','i','p'))
+ return ATOM_SKIP;
+ else if (mp4ff_atom_compare(a,b,c,d, 's','i','n','f'))
+ return ATOM_SINF;
+ else if (mp4ff_atom_compare(a,b,c,d, 's','c','h','i'))
+ return ATOM_SCHI;
+ } else if (a == '©') {
+ if (mp4ff_atom_compare(a,b,c,d, '©','n','a','m'))
+ return ATOM_TITLE;
+ else if (mp4ff_atom_compare(a,b,c,d, '©','A','R','T'))
+ return ATOM_ARTIST;
+ else if (mp4ff_atom_compare(a,b,c,d, '©','w','r','t'))
+ return ATOM_WRITER;
+ else if (mp4ff_atom_compare(a,b,c,d, '©','a','l','b'))
+ return ATOM_ALBUM;
+ else if (mp4ff_atom_compare(a,b,c,d, '©','d','a','y'))
+ return ATOM_DATE;
+ else if (mp4ff_atom_compare(a,b,c,d, '©','t','o','o'))
+ return ATOM_TOOL;
+ else if (mp4ff_atom_compare(a,b,c,d, '©','c','m','t'))
+ return ATOM_COMMENT;
+ else if (mp4ff_atom_compare(a,b,c,d, '©','g','e','n'))
+ return ATOM_GENRE1;
+ }
+
+ if (mp4ff_atom_compare(a,b,c,d, 'e','d','t','s'))
+ return ATOM_EDTS;
+ else if (mp4ff_atom_compare(a,b,c,d, 'e','s','d','s'))
+ return ATOM_ESDS;
+ else if (mp4ff_atom_compare(a,b,c,d, 'f','t','y','p'))
+ return ATOM_FTYP;
+ else if (mp4ff_atom_compare(a,b,c,d, 'f','r','e','e'))
+ return ATOM_FREE;
+ else if (mp4ff_atom_compare(a,b,c,d, 'h','m','h','d'))
+ return ATOM_HMHD;
+ else if (mp4ff_atom_compare(a,b,c,d, 'v','m','h','d'))
+ return ATOM_VMHD;
+ else if (mp4ff_atom_compare(a,b,c,d, 'u','d','t','a'))
+ return ATOM_UDTA;
+ else if (mp4ff_atom_compare(a,b,c,d, 'i','l','s','t'))
+ return ATOM_ILST;
+ else if (mp4ff_atom_compare(a,b,c,d, 'n','a','m','e'))
+ return ATOM_NAME;
+ else if (mp4ff_atom_compare(a,b,c,d, 'd','a','t','a'))
+ return ATOM_DATA;
+ else if (mp4ff_atom_compare(a,b,c,d, 'd','i','s','k'))
+ return ATOM_DISC;
+ else if (mp4ff_atom_compare(a,b,c,d, 'g','n','r','e'))
+ return ATOM_GENRE2;
+ else if (mp4ff_atom_compare(a,b,c,d, 'c','o','v','r'))
+ return ATOM_COVER;
+ else if (mp4ff_atom_compare(a,b,c,d, 'c','p','i','l'))
+ return ATOM_COMPILATION;
+ else if (mp4ff_atom_compare(a,b,c,d, 'c','t','t','s'))
+ return ATOM_CTTS;
+ else if (mp4ff_atom_compare(a,b,c,d, 'd','r','m','s'))
+ return ATOM_DRMS;
+ else if (mp4ff_atom_compare(a,b,c,d, 'f','r','m','a'))
+ return ATOM_FRMA;
+ else if (mp4ff_atom_compare(a,b,c,d, 'p','r','i','v'))
+ return ATOM_PRIV;
+ else if (mp4ff_atom_compare(a,b,c,d, 'i','v','i','v'))
+ return ATOM_IVIV;
+ else
+ return ATOM_UNKNOWN;
+}
+
+/* read atom header, return atom size, atom size is with header included */
+uint64_t mp4ff_atom_read_header(mp4ff_t *f, uint8_t *atom_type, uint8_t *header_size)
+{
+ uint64_t size;
+ int32_t ret;
+ int8_t atom_header[8];
+
+ ret = mp4ff_read_data(f, atom_header, 8);
+ if (ret != 8)
+ return 0;
+
+ size = mp4ff_atom_get_size(atom_header);
+ *header_size = 8;
+
+ /* check for 64 bit atom size */
+ if (size == 1)
+ {
+ *header_size = 16;
+ size = mp4ff_read_int64(f);
+ }
+
+ //printf("%c%c%c%c\n", atom_header[4], atom_header[5], atom_header[6], atom_header[7]);
+
+ *atom_type = mp4ff_atom_name_to_type(atom_header[4], atom_header[5], atom_header[6], atom_header[7]);
+
+ return size;
+}
+
+static int32_t mp4ff_read_stsz(mp4ff_t *f)
+{
+ mp4ff_read_char(f); /* version */
+ mp4ff_read_int24(f); /* flags */
+ f->track[f->total_tracks - 1]->stsz_sample_size = mp4ff_read_int32(f);
+ f->track[f->total_tracks - 1]->stsz_sample_count = mp4ff_read_int32(f);
+
+ if (f->track[f->total_tracks - 1]->stsz_sample_size == 0)
+ {
+ int32_t i;
+ f->track[f->total_tracks - 1]->stsz_table =
+ (int32_t*)malloc(f->track[f->total_tracks - 1]->stsz_sample_count*sizeof(int32_t));
+
+ for (i = 0; i < f->track[f->total_tracks - 1]->stsz_sample_count; i++)
+ {
+ f->track[f->total_tracks - 1]->stsz_table[i] = mp4ff_read_int32(f);
+ }
+ }
+
+ return 0;
+}
+
+static int32_t mp4ff_read_esds(mp4ff_t *f)
+{
+ uint8_t tag;
+ uint32_t temp;
+
+ mp4ff_read_char(f); /* version */
+ mp4ff_read_int24(f); /* flags */
+
+ /* get and verify ES_DescrTag */
+ tag = mp4ff_read_char(f);
+ if (tag == 0x03)
+ {
+ /* read length */
+ if (mp4ff_read_mp4_descr_length(f) < 5 + 15)
+ {
+ return 1;
+ }
+ /* skip 3 bytes */
+ mp4ff_read_int24(f);
+ } else {
+ /* skip 2 bytes */
+ mp4ff_read_int16(f);
+ }
+
+ /* get and verify DecoderConfigDescrTab */
+ if (mp4ff_read_char(f) != 0x04)
+ {
+ return 1;
+ }
+
+ /* read length */
+ temp = mp4ff_read_mp4_descr_length(f);
+ if (temp < 13) return 1;
+
+ f->track[f->total_tracks - 1]->audioType = mp4ff_read_char(f);
+ mp4ff_read_int32(f);//0x15000414 ????
+ f->track[f->total_tracks - 1]->maxBitrate = mp4ff_read_int32(f);
+ f->track[f->total_tracks - 1]->avgBitrate = mp4ff_read_int32(f);
+
+ /* get and verify DecSpecificInfoTag */
+ if (mp4ff_read_char(f) != 0x05)
+ {
+ return 1;
+ }
+
+ /* read length */
+ f->track[f->total_tracks - 1]->decoderConfigLen = mp4ff_read_mp4_descr_length(f);
+
+ if (f->track[f->total_tracks - 1]->decoderConfig)
+ free(f->track[f->total_tracks - 1]->decoderConfig);
+ f->track[f->total_tracks - 1]->decoderConfig = malloc(f->track[f->total_tracks - 1]->decoderConfigLen);
+ if (f->track[f->total_tracks - 1]->decoderConfig)
+ {
+ mp4ff_read_data(f, f->track[f->total_tracks - 1]->decoderConfig, f->track[f->total_tracks - 1]->decoderConfigLen);
+ } else {
+ f->track[f->total_tracks - 1]->decoderConfigLen = 0;
+ }
+
+ /* will skip the remainder of the atom */
+ return 0;
+}
+
+static int32_t mp4ff_read_mp4a(mp4ff_t *f)
+{
+ uint64_t size;
+ int32_t i;
+ uint8_t atom_type = 0;
+ uint8_t header_size = 0;
+
+ for (i = 0; i < 6; i++)
+ {
+ mp4ff_read_char(f); /* reserved */
+ }
+ /* data_reference_index */ mp4ff_read_int16(f);
+
+ mp4ff_read_int32(f); /* reserved */
+ mp4ff_read_int32(f); /* reserved */
+
+ f->track[f->total_tracks - 1]->channelCount = mp4ff_read_int16(f);
+ f->track[f->total_tracks - 1]->sampleSize = mp4ff_read_int16(f);
+
+ mp4ff_read_int16(f);
+ mp4ff_read_int16(f);
+
+ f->track[f->total_tracks - 1]->sampleRate = mp4ff_read_int16(f);
+
+ mp4ff_read_int16(f);
+
+ size = mp4ff_atom_read_header(f, &atom_type, &header_size);
+ if (atom_type == ATOM_ESDS)
+ {
+ mp4ff_read_esds(f);
+ }
+
+ return 0;
+}
+
+#ifdef ITUNES_DRM
+static int32_t mp4ff_read_drms(mp4ff_t *f, uint64_t skip)
+{
+ uint64_t size;
+ int32_t i;
+ uint8_t atom_type = 0;
+ uint8_t header_size = 0;
+ uint32_t drms_user_key[4];
+
+ if (drms_get_user_key(NULL, drms_user_key) == 0)
+ {
+ f->track[f->total_tracks - 1]->p_drms = drms_alloc();
+
+ drms_init( f->track[f->total_tracks - 1]->p_drms,
+ DRMS_INIT_UKEY, (uint8_t *)drms_user_key,
+ sizeof(drms_user_key) );
+ }
+
+ for (i = 0; i < 6; i++)
+ {
+ mp4ff_read_char(f); /* reserved */
+ }
+ /* data_reference_index */ mp4ff_read_int16(f);
+
+ mp4ff_read_int32(f); /* reserved */
+ mp4ff_read_int32(f); /* reserved */
+
+ f->track[f->total_tracks - 1]->channelCount = mp4ff_read_int16(f);
+ f->track[f->total_tracks - 1]->sampleSize = mp4ff_read_int16(f);
+
+ mp4ff_read_int16(f);
+ mp4ff_read_int16(f);
+
+ f->track[f->total_tracks - 1]->sampleRate = mp4ff_read_int16(f);
+
+ mp4ff_read_int16(f);
+
+ size = mp4ff_atom_read_header(f, &atom_type, &header_size);
+ if (atom_type == ATOM_ESDS)
+ {
+ mp4ff_read_esds(f);
+ }
+ mp4ff_set_position(f, skip+size+28);
+
+ size = mp4ff_atom_read_header(f, &atom_type, &header_size);
+ if (atom_type == ATOM_SINF)
+ {
+ parse_sub_atoms(f, size-header_size);
+ }
+
+ return 0;
+}
+
+static int32_t mp4ff_read_frma(mp4ff_t *f)
+{
+ uint8_t atom_type;
+ int8_t type[4];
+
+ mp4ff_read_data(f, type, 4);
+
+ atom_type = mp4ff_atom_name_to_type(type[0], type[1], type[2], type[3]);
+
+ if (atom_type == ATOM_MP4A)
+ {
+ f->track[f->total_tracks - 1]->type = TRACK_AUDIO;
+ } else if (atom_type == ATOM_MP4V) {
+ f->track[f->total_tracks - 1]->type = TRACK_VIDEO;
+ } else if (atom_type == ATOM_MP4S) {
+ f->track[f->total_tracks - 1]->type = TRACK_SYSTEM;
+ } else {
+ f->track[f->total_tracks - 1]->type = TRACK_UNKNOWN;
+ }
+
+ return 0;
+}
+
+static int32_t mp4ff_read_name(mp4ff_t *f, uint64_t size)
+{
+ uint8_t *data = malloc(size);
+ mp4ff_read_data(f, data, size);
+
+ if (f->track[f->total_tracks - 1]->p_drms != NULL)
+ {
+ drms_init(f->track[f->total_tracks - 1]->p_drms,
+ DRMS_INIT_NAME, data, strlen(data) );
+ }
+
+ if (data)
+ free(data);
+
+ return 0;
+}
+
+static int32_t mp4ff_read_priv(mp4ff_t *f, uint64_t size)
+{
+ uint8_t *data = malloc(size);
+ mp4ff_read_data(f, data, size);
+
+ if (f->track[f->total_tracks - 1]->p_drms != 0)
+ {
+ drms_init(f->track[f->total_tracks - 1]->p_drms,
+ DRMS_INIT_PRIV, data, size );
+ }
+
+ if (data)
+ free(data);
+
+ return 0;
+}
+
+static int32_t mp4ff_read_iviv(mp4ff_t *f, uint64_t size)
+{
+ uint8_t *data = malloc(size);
+ mp4ff_read_data(f, data, size);
+
+ if (f->track[f->total_tracks - 1]->p_drms != 0)
+ {
+ drms_init(f->track[f->total_tracks - 1]->p_drms,
+ DRMS_INIT_IVIV, data, sizeof(uint32_t) * 4 );
+ }
+
+ if (data)
+ free(data);
+
+ return 0;
+}
+#endif
+
+static int32_t mp4ff_read_stsd(mp4ff_t *f)
+{
+ int32_t i;
+ uint8_t header_size = 0;
+
+ mp4ff_read_char(f); /* version */
+ mp4ff_read_int24(f); /* flags */
+
+ f->track[f->total_tracks - 1]->stsd_entry_count = mp4ff_read_int32(f);
+
+ for (i = 0; i < f->track[f->total_tracks - 1]->stsd_entry_count; i++)
+ {
+ uint64_t skip = mp4ff_position(f);
+ uint64_t size;
+ uint8_t atom_type = 0;
+ size = mp4ff_atom_read_header(f, &atom_type, &header_size);
+ skip += size;
+
+ if (atom_type == ATOM_MP4A)
+ {
+ f->track[f->total_tracks - 1]->type = TRACK_AUDIO;
+ mp4ff_read_mp4a(f);
+ } else if (atom_type == ATOM_MP4V) {
+ f->track[f->total_tracks - 1]->type = TRACK_VIDEO;
+ } else if (atom_type == ATOM_MP4S) {
+ f->track[f->total_tracks - 1]->type = TRACK_SYSTEM;
+#ifdef ITUNES_DRM
+ } else if (atom_type == ATOM_DRMS) {
+ // track type is read from the "frma" atom
+ f->track[f->total_tracks - 1]->type = TRACK_UNKNOWN;
+ mp4ff_read_drms(f, skip-size+header_size);
+#endif
+ } else {
+ f->track[f->total_tracks - 1]->type = TRACK_UNKNOWN;
+ }
+
+ mp4ff_set_position(f, skip);
+ }
+
+ return 0;
+}
+
+static int32_t mp4ff_read_stsc(mp4ff_t *f)
+{
+ int32_t i;
+
+ mp4ff_read_char(f); /* version */
+ mp4ff_read_int24(f); /* flags */
+ f->track[f->total_tracks - 1]->stsc_entry_count = mp4ff_read_int32(f);
+
+ f->track[f->total_tracks - 1]->stsc_first_chunk =
+ (int32_t*)malloc(f->track[f->total_tracks - 1]->stsc_entry_count*sizeof(int32_t));
+ f->track[f->total_tracks - 1]->stsc_samples_per_chunk =
+ (int32_t*)malloc(f->track[f->total_tracks - 1]->stsc_entry_count*sizeof(int32_t));
+ f->track[f->total_tracks - 1]->stsc_sample_desc_index =
+ (int32_t*)malloc(f->track[f->total_tracks - 1]->stsc_entry_count*sizeof(int32_t));
+
+ for (i = 0; i < f->track[f->total_tracks - 1]->stsc_entry_count; i++)
+ {
+ f->track[f->total_tracks - 1]->stsc_first_chunk[i] = mp4ff_read_int32(f);
+ f->track[f->total_tracks - 1]->stsc_samples_per_chunk[i] = mp4ff_read_int32(f);
+ f->track[f->total_tracks - 1]->stsc_sample_desc_index[i] = mp4ff_read_int32(f);
+ }
+
+ return 0;
+}
+
+static int32_t mp4ff_read_stco(mp4ff_t *f)
+{
+ int32_t i;
+
+ mp4ff_read_char(f); /* version */
+ mp4ff_read_int24(f); /* flags */
+ f->track[f->total_tracks - 1]->stco_entry_count = mp4ff_read_int32(f);
+
+ f->track[f->total_tracks - 1]->stco_chunk_offset =
+ (int32_t*)malloc(f->track[f->total_tracks - 1]->stco_entry_count*sizeof(int32_t));
+
+ for (i = 0; i < f->track[f->total_tracks - 1]->stco_entry_count; i++)
+ {
+ f->track[f->total_tracks - 1]->stco_chunk_offset[i] = mp4ff_read_int32(f);
+ }
+
+ return 0;
+}
+
+static int32_t mp4ff_read_ctts(mp4ff_t *f)
+{
+ int32_t i;
+ mp4ff_track_t * p_track = f->track[f->total_tracks - 1];
+
+ if (p_track->ctts_entry_count) return 0;
+
+ mp4ff_read_char(f); /* version */
+ mp4ff_read_int24(f); /* flags */
+ p_track->ctts_entry_count = mp4ff_read_int32(f);
+
+ p_track->ctts_sample_count = (int32_t*)malloc(p_track->ctts_entry_count * sizeof(int32_t));
+ p_track->ctts_sample_offset = (int32_t*)malloc(p_track->ctts_entry_count * sizeof(int32_t));
+
+ if (p_track->ctts_sample_count == 0 || p_track->ctts_sample_offset == 0)
+ {
+ if (p_track->ctts_sample_count) {free(p_track->ctts_sample_count);p_track->ctts_sample_count=0;}
+ if (p_track->ctts_sample_offset) {free(p_track->ctts_sample_offset);p_track->ctts_sample_offset=0;}
+ p_track->ctts_entry_count = 0;
+ return 0;
+ }
+ else
+ {
+ for (i = 0; i < f->track[f->total_tracks - 1]->ctts_entry_count; i++)
+ {
+ p_track->ctts_sample_count[i] = mp4ff_read_int32(f);
+ p_track->ctts_sample_offset[i] = mp4ff_read_int32(f);
+ }
+ return 1;
+ }
+}
+
+static int32_t mp4ff_read_stts(mp4ff_t *f)
+{
+ int32_t i;
+ mp4ff_track_t * p_track = f->track[f->total_tracks - 1];
+
+ if (p_track->stts_entry_count) return 0;
+
+ mp4ff_read_char(f); /* version */
+ mp4ff_read_int24(f); /* flags */
+ p_track->stts_entry_count = mp4ff_read_int32(f);
+
+ p_track->stts_sample_count = (int32_t*)malloc(p_track->stts_entry_count * sizeof(int32_t));
+ p_track->stts_sample_delta = (int32_t*)malloc(p_track->stts_entry_count * sizeof(int32_t));
+
+ if (p_track->stts_sample_count == 0 || p_track->stts_sample_delta == 0)
+ {
+ if (p_track->stts_sample_count) {free(p_track->stts_sample_count);p_track->stts_sample_count=0;}
+ if (p_track->stts_sample_delta) {free(p_track->stts_sample_delta);p_track->stts_sample_delta=0;}
+ p_track->stts_entry_count = 0;
+ return 0;
+ }
+ else
+ {
+ for (i = 0; i < f->track[f->total_tracks - 1]->stts_entry_count; i++)
+ {
+ p_track->stts_sample_count[i] = mp4ff_read_int32(f);
+ p_track->stts_sample_delta[i] = mp4ff_read_int32(f);
+ }
+ return 1;
+ }
+}
+
+static int32_t mp4ff_read_mvhd(mp4ff_t *f)
+{
+ int32_t i;
+
+ mp4ff_read_char(f); /* version */
+ mp4ff_read_int24(f); /* flags */
+ /* creation_time */ mp4ff_read_int32(f);
+ /* modification_time */ mp4ff_read_int32(f);
+ f->time_scale = mp4ff_read_int32(f);
+ f->duration = mp4ff_read_int32(f);
+ /* preferred_rate */ mp4ff_read_int32(f); /*mp4ff_read_fixed32(f);*/
+ /* preferred_volume */ mp4ff_read_int16(f); /*mp4ff_read_fixed16(f);*/
+ for (i = 0; i < 10; i++)
+ {
+ /* reserved */ mp4ff_read_char(f);
+ }
+ for (i = 0; i < 9; i++)
+ {
+ mp4ff_read_int32(f); /* matrix */
+ }
+ /* preview_time */ mp4ff_read_int32(f);
+ /* preview_duration */ mp4ff_read_int32(f);
+ /* poster_time */ mp4ff_read_int32(f);
+ /* selection_time */ mp4ff_read_int32(f);
+ /* selection_duration */ mp4ff_read_int32(f);
+ /* current_time */ mp4ff_read_int32(f);
+ /* next_track_id */ mp4ff_read_int32(f);
+
+ return 0;
+}
+
+#if 0
+static int32_t mp4ff_read_tkhd(mp4ff_t *f)
+{
+ uint8_t version;
+ uint32_t flags;
+ version = mp4ff_read_char(f); /* version */
+ flags = mp4ff_read_int24(f); /* flags */
+ if (version==1)
+ {
+ mp4ff_read_int64(f);//creation-time
+ mp4ff_read_int64(f);//modification-time
+ mp4ff_read_int32(f);//track-id
+ mp4ff_read_int32(f);//reserved
+ f->track[f->total_tracks - 1]->duration = mp4ff_read_int64(f);//duration
+ }
+ else //version == 0
+ {
+ mp4ff_read_int32(f);//creation-time
+ mp4ff_read_int32(f);//modification-time
+ mp4ff_read_int32(f);//track-id
+ mp4ff_read_int32(f);//reserved
+ f->track[f->total_tracks - 1]->duration = mp4ff_read_int32(f);//duration
+ if (f->track[f->total_tracks - 1]->duration == 0xFFFFFFFF)
+ f->track[f->total_tracks - 1]->duration = 0xFFFFFFFFFFFFFFFF;
+
+ }
+ mp4ff_read_int32(f);//reserved
+ mp4ff_read_int32(f);//reserved
+ mp4ff_read_int16(f);//layer
+ mp4ff_read_int16(f);//pre-defined
+ mp4ff_read_int16(f);//volume
+ mp4ff_read_int16(f);//reserved
+
+ //matrix
+ mp4ff_read_int32(f); mp4ff_read_int32(f); mp4ff_read_int32(f);
+ mp4ff_read_int32(f); mp4ff_read_int32(f); mp4ff_read_int32(f);
+ mp4ff_read_int32(f); mp4ff_read_int32(f); mp4ff_read_int32(f);
+ mp4ff_read_int32(f);//width
+ mp4ff_read_int32(f);//height
+ return 1;
+}
+#endif
+
+static int32_t mp4ff_read_mdhd(mp4ff_t *f)
+{
+ uint32_t version;
+
+ version = mp4ff_read_int32(f);
+ if (version==1)
+ {
+ mp4ff_read_int64(f);//creation-time
+ mp4ff_read_int64(f);//modification-time
+ f->track[f->total_tracks - 1]->timeScale = mp4ff_read_int32(f);//timescale
+ f->track[f->total_tracks - 1]->duration = mp4ff_read_int64(f);//duration
+ }
+ else //version == 0
+ {
+ uint32_t temp;
+
+ mp4ff_read_int32(f);//creation-time
+ mp4ff_read_int32(f);//modification-time
+ f->track[f->total_tracks - 1]->timeScale = mp4ff_read_int32(f);//timescale
+ temp = mp4ff_read_int32(f);
+ f->track[f->total_tracks - 1]->duration = (temp == (uint32_t)(-1)) ? (uint64_t)(-1) : (uint64_t)(temp);
+ }
+ mp4ff_read_int16(f);
+ mp4ff_read_int16(f);
+ return 1;
+}
+#ifdef USE_TAGGING
+static int32_t mp4ff_read_meta(mp4ff_t *f, const uint64_t size)
+{
+ uint64_t subsize, sumsize = 0;
+ uint8_t atom_type;
+ uint8_t header_size = 0;
+
+ mp4ff_read_char(f); /* version */
+ mp4ff_read_int24(f); /* flags */
+
+ while (sumsize < (size-12))
+ {
+ subsize = mp4ff_atom_read_header(f, &atom_type, &header_size);
+ if (atom_type == ATOM_ILST)
+ {
+ mp4ff_parse_metadata(f, (uint32_t)(subsize-(header_size+4)));
+ } else {
+ mp4ff_set_position(f, mp4ff_position(f)+subsize-header_size);
+ }
+ sumsize += subsize;
+ }
+
+ return 0;
+}
+#endif
+
+int32_t mp4ff_atom_read(mp4ff_t *f, const int32_t size, const uint8_t atom_type)
+{
+ uint64_t dest_position = mp4ff_position(f)+size-8;
+ if (atom_type == ATOM_STSZ)
+ {
+ /* sample size box */
+ mp4ff_read_stsz(f);
+ } else if (atom_type == ATOM_STTS) {
+ /* time to sample box */
+ mp4ff_read_stts(f);
+ } else if (atom_type == ATOM_CTTS) {
+ /* composition offset box */
+ mp4ff_read_ctts(f);
+ } else if (atom_type == ATOM_STSC) {
+ /* sample to chunk box */
+ mp4ff_read_stsc(f);
+ } else if (atom_type == ATOM_STCO) {
+ /* chunk offset box */
+ mp4ff_read_stco(f);
+ } else if (atom_type == ATOM_STSD) {
+ /* sample description box */
+ mp4ff_read_stsd(f);
+ } else if (atom_type == ATOM_MVHD) {
+ /* movie header box */
+ mp4ff_read_mvhd(f);
+ } else if (atom_type == ATOM_MDHD) {
+ /* track header */
+ mp4ff_read_mdhd(f);
+#ifdef ITUNES_DRM
+ } else if (atom_type == ATOM_FRMA) {
+ /* DRM track format */
+ mp4ff_read_frma(f);
+ } else if (atom_type == ATOM_IVIV) {
+ mp4ff_read_iviv(f, size-8);
+ } else if (atom_type == ATOM_NAME) {
+ mp4ff_read_name(f, size-8);
+ } else if (atom_type == ATOM_PRIV) {
+ mp4ff_read_priv(f, size-8);
+#endif
+#ifdef USE_TAGGING
+ } else if (atom_type == ATOM_META) {
+ /* iTunes Metadata box */
+ mp4ff_read_meta(f, size);
+#endif
+ }
+
+ mp4ff_set_position(f, dest_position);
+
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 09:32:57 +0000