diff options
Diffstat (limited to 'faad2/src/common/mp4ff/mp4ff.c')
| -rw-r--r-- | faad2/src/common/mp4ff/mp4ff.c | 475 |
1 files changed, 475 insertions, 0 deletions
diff --git a/faad2/src/common/mp4ff/mp4ff.c b/faad2/src/common/mp4ff/mp4ff.c new file mode 100644 index 0000000..f513e86 --- /dev/null +++ b/faad2/src/common/mp4ff/mp4ff.c @@ -0,0 +1,475 @@ +/*
+** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
+** Copyright (C) 2003-2005 M. Bakker, Nero 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.
+**
+** The "appropriate copyright message" mentioned in section 2c of the GPLv2
+** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
+**
+** Commercial non-GPL licensing of this software is possible.
+** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
+**
+** $Id: mp4ff.c,v 1.22 2009/01/26 23:01:40 menno Exp $
+**/
+
+#include <stdlib.h>
+#include <string.h>
+#include "mp4ffint.h"
+
+mp4ff_t *mp4ff_open_read(mp4ff_callback_t *f)
+{
+ mp4ff_t *ff = malloc(sizeof(mp4ff_t));
+
+ memset(ff, 0, sizeof(mp4ff_t));
+
+ ff->stream = f;
+
+ parse_atoms(ff,0);
+
+ return ff;
+}
+
+mp4ff_t *mp4ff_open_read_metaonly(mp4ff_callback_t *f)
+{
+ mp4ff_t *ff = malloc(sizeof(mp4ff_t));
+
+ memset(ff, 0, sizeof(mp4ff_t));
+
+ ff->stream = f;
+
+ parse_atoms(ff,1);
+
+ return ff;
+}
+
+void mp4ff_close(mp4ff_t *ff)
+{
+ int32_t i;
+
+ for (i = 0; i < ff->total_tracks; i++)
+ {
+ if (ff->track[i])
+ {
+ if (ff->track[i]->stsz_table)
+ free(ff->track[i]->stsz_table);
+ if (ff->track[i]->stts_sample_count)
+ free(ff->track[i]->stts_sample_count);
+ if (ff->track[i]->stts_sample_delta)
+ free(ff->track[i]->stts_sample_delta);
+ if (ff->track[i]->stsc_first_chunk)
+ free(ff->track[i]->stsc_first_chunk);
+ if (ff->track[i]->stsc_samples_per_chunk)
+ free(ff->track[i]->stsc_samples_per_chunk);
+ if (ff->track[i]->stsc_sample_desc_index)
+ free(ff->track[i]->stsc_sample_desc_index);
+ if (ff->track[i]->stco_chunk_offset)
+ free(ff->track[i]->stco_chunk_offset);
+ if (ff->track[i]->decoderConfig)
+ free(ff->track[i]->decoderConfig);
+ if (ff->track[i]->ctts_sample_count)
+ free(ff->track[i]->ctts_sample_count);
+ if (ff->track[i]->ctts_sample_offset)
+ free(ff->track[i]->ctts_sample_offset);
+#ifdef ITUNES_DRM
+ if (ff->track[i]->p_drms)
+ drms_free(ff->track[i]->p_drms);
+#endif
+ free(ff->track[i]);
+ }
+ }
+
+#ifdef USE_TAGGING
+ mp4ff_tag_delete(&(ff->tags));
+#endif
+
+ if (ff) free(ff);
+}
+
+void mp4ff_track_add(mp4ff_t *f)
+{
+ f->total_tracks++;
+
+ f->track[f->total_tracks - 1] = malloc(sizeof(mp4ff_track_t));
+
+ memset(f->track[f->total_tracks - 1], 0, sizeof(mp4ff_track_t));
+}
+
+static int need_parse_when_meta_only(uint8_t atom_type)
+{
+ switch(atom_type)
+ {
+ case ATOM_EDTS:
+// case ATOM_MDIA:
+// case ATOM_MINF:
+ case ATOM_DRMS:
+ case ATOM_SINF:
+ case ATOM_SCHI:
+// case ATOM_STBL:
+// case ATOM_STSD:
+ case ATOM_STTS:
+ case ATOM_STSZ:
+ case ATOM_STZ2:
+ case ATOM_STCO:
+ case ATOM_STSC:
+// case ATOM_CTTS:
+ case ATOM_FRMA:
+ case ATOM_IVIV:
+ case ATOM_PRIV:
+ return 0;
+ default:
+ return 1;
+ }
+}
+
+/* parse atoms that are sub atoms of other atoms */
+int32_t parse_sub_atoms(mp4ff_t *f, const uint64_t total_size,int meta_only)
+{
+ uint64_t size;
+ uint8_t atom_type = 0;
+ uint64_t counted_size = 0;
+ uint8_t header_size = 0;
+
+ while (counted_size < total_size)
+ {
+ size = mp4ff_atom_read_header(f, &atom_type, &header_size);
+ counted_size += size;
+
+ /* check for end of file */
+ if (size == 0)
+ break;
+
+ /* we're starting to read a new track, update index,
+ * so that all data and tables get written in the right place
+ */
+ if (atom_type == ATOM_TRAK)
+ {
+ mp4ff_track_add(f);
+ }
+
+ /* parse subatoms */
+ if (meta_only && !need_parse_when_meta_only(atom_type))
+ {
+ mp4ff_set_position(f, mp4ff_position(f)+size-header_size);
+ } else if (atom_type < SUBATOMIC)
+ {
+ parse_sub_atoms(f, size-header_size,meta_only);
+ } else {
+ mp4ff_atom_read(f, (uint32_t)size, atom_type);
+ }
+ }
+
+ return 0;
+}
+
+/* parse root atoms */
+int32_t parse_atoms(mp4ff_t *f,int meta_only)
+{
+ uint64_t size;
+ uint8_t atom_type = 0;
+ uint8_t header_size = 0;
+
+ f->file_size = 0;
+
+ while ((size = mp4ff_atom_read_header(f, &atom_type, &header_size)) != 0)
+ {
+ f->file_size += size;
+ f->last_atom = atom_type;
+
+ if (atom_type == ATOM_MDAT && f->moov_read)
+ {
+ /* moov atom is before mdat, we can stop reading when mdat is encountered */
+ /* file position will stay at beginning of mdat data */
+// break;
+ }
+
+ if (atom_type == ATOM_MOOV && size > header_size)
+ {
+ f->moov_read = 1;
+ f->moov_offset = mp4ff_position(f)-header_size;
+ f->moov_size = size;
+ }
+
+ /* parse subatoms */
+ if (meta_only && !need_parse_when_meta_only(atom_type))
+ {
+ mp4ff_set_position(f, mp4ff_position(f)+size-header_size);
+ } else if (atom_type < SUBATOMIC)
+ {
+ parse_sub_atoms(f, size-header_size,meta_only);
+ } else {
+ /* skip this atom */
+ mp4ff_set_position(f, mp4ff_position(f)+size-header_size);
+ }
+ }
+
+ return 0;
+}
+
+int32_t mp4ff_get_decoder_config(const mp4ff_t *f, const int32_t track,
+ uint8_t** ppBuf, uint32_t* pBufSize)
+{
+ if (track >= f->total_tracks)
+ {
+ *ppBuf = NULL;
+ *pBufSize = 0;
+ return 1;
+ }
+
+ if (f->track[track]->decoderConfig == NULL || f->track[track]->decoderConfigLen == 0)
+ {
+ *ppBuf = NULL;
+ *pBufSize = 0;
+ } else {
+ *ppBuf = malloc(f->track[track]->decoderConfigLen);
+ if (*ppBuf == NULL)
+ {
+ *pBufSize = 0;
+ return 1;
+ }
+ memcpy(*ppBuf, f->track[track]->decoderConfig, f->track[track]->decoderConfigLen);
+ *pBufSize = f->track[track]->decoderConfigLen;
+ }
+
+ return 0;
+}
+
+int32_t mp4ff_get_track_type(const mp4ff_t *f, const int track)
+{
+ return f->track[track]->type;
+}
+
+int32_t mp4ff_total_tracks(const mp4ff_t *f)
+{
+ return f->total_tracks;
+}
+
+int32_t mp4ff_time_scale(const mp4ff_t *f, const int32_t track)
+{
+ return f->track[track]->timeScale;
+}
+
+uint32_t mp4ff_get_avg_bitrate(const mp4ff_t *f, const int32_t track)
+{
+ return f->track[track]->avgBitrate;
+}
+
+uint32_t mp4ff_get_max_bitrate(const mp4ff_t *f, const int32_t track)
+{
+ return f->track[track]->maxBitrate;
+}
+
+int64_t mp4ff_get_track_duration(const mp4ff_t *f, const int32_t track)
+{
+ return f->track[track]->duration;
+}
+
+int64_t mp4ff_get_track_duration_use_offsets(const mp4ff_t *f, const int32_t track)
+{
+ int64_t duration = mp4ff_get_track_duration(f,track);
+ if (duration!=-1)
+ {
+ int64_t offset = mp4ff_get_sample_offset(f,track,0);
+ if (offset > duration) duration = 0;
+ else duration -= offset;
+ }
+ return duration;
+}
+
+
+int32_t mp4ff_num_samples(const mp4ff_t *f, const int32_t track)
+{
+ int32_t i;
+ int32_t total = 0;
+
+ for (i = 0; i < f->track[track]->stts_entry_count; i++)
+ {
+ total += f->track[track]->stts_sample_count[i];
+ }
+ return total;
+}
+
+
+
+
+uint32_t mp4ff_get_sample_rate(const mp4ff_t *f, const int32_t track)
+{
+ return f->track[track]->sampleRate;
+}
+
+uint32_t mp4ff_get_channel_count(const mp4ff_t * f,const int32_t track)
+{
+ return f->track[track]->channelCount;
+}
+
+uint32_t mp4ff_get_audio_type(const mp4ff_t * f,const int32_t track)
+{
+ return f->track[track]->audioType;
+}
+
+int32_t mp4ff_get_sample_duration_use_offsets(const mp4ff_t *f, const int32_t track, const int32_t sample)
+{
+ int32_t d,o;
+ d = mp4ff_get_sample_duration(f,track,sample);
+ if (d!=-1)
+ {
+ o = mp4ff_get_sample_offset(f,track,sample);
+ if (o>d) d = 0;
+ else d -= o;
+ }
+ return d;
+}
+
+int32_t mp4ff_get_sample_duration(const mp4ff_t *f, const int32_t track, const int32_t sample)
+{
+ int32_t i, co = 0;
+
+ for (i = 0; i < f->track[track]->stts_entry_count; i++)
+ {
+ int32_t delta = f->track[track]->stts_sample_count[i];
+ if (sample < co + delta)
+ return f->track[track]->stts_sample_delta[i];
+ co += delta;
+ }
+ return (int32_t)(-1);
+}
+
+int64_t mp4ff_get_sample_position(const mp4ff_t *f, const int32_t track, const int32_t sample)
+{
+ int32_t i, co = 0;
+ int64_t acc = 0;
+
+ for (i = 0; i < f->track[track]->stts_entry_count; i++)
+ {
+ int32_t delta = f->track[track]->stts_sample_count[i];
+ if (sample < co + delta)
+ {
+ acc += f->track[track]->stts_sample_delta[i] * (sample - co);
+ return acc;
+ }
+ else
+ {
+ acc += f->track[track]->stts_sample_delta[i] * delta;
+ }
+ co += delta;
+ }
+ return (int64_t)(-1);
+}
+
+int32_t mp4ff_get_sample_offset(const mp4ff_t *f, const int32_t track, const int32_t sample)
+{
+ int32_t i, co = 0;
+
+ for (i = 0; i < f->track[track]->ctts_entry_count; i++)
+ {
+ int32_t delta = f->track[track]->ctts_sample_count[i];
+ if (sample < co + delta)
+ return f->track[track]->ctts_sample_offset[i];
+ co += delta;
+ }
+ return 0;
+}
+
+int32_t mp4ff_find_sample(const mp4ff_t *f, const int32_t track, const int64_t offset,int32_t * toskip)
+{
+ int32_t i, co = 0;
+ int64_t offset_total = 0;
+ mp4ff_track_t * p_track = f->track[track];
+
+ for (i = 0; i < p_track->stts_entry_count; i++)
+ {
+ int32_t sample_count = p_track->stts_sample_count[i];
+ int32_t sample_delta = p_track->stts_sample_delta[i];
+ int64_t offset_delta = (int64_t)sample_delta * (int64_t)sample_count;
+ if (offset < offset_total + offset_delta)
+ {
+ int64_t offset_fromstts = offset - offset_total;
+ if (toskip) *toskip = (int32_t)(offset_fromstts % sample_delta);
+ return co + (int32_t)(offset_fromstts / sample_delta);
+ }
+ else
+ {
+ offset_total += offset_delta;
+ }
+ co += sample_count;
+ }
+ return (int32_t)(-1);
+}
+
+int32_t mp4ff_find_sample_use_offsets(const mp4ff_t *f, const int32_t track, const int64_t offset,int32_t * toskip)
+{
+ return mp4ff_find_sample(f,track,offset + mp4ff_get_sample_offset(f,track,0),toskip);
+}
+
+int32_t mp4ff_read_sample(mp4ff_t *f, const int32_t track, const int32_t sample,
+ uint8_t **audio_buffer, uint32_t *bytes)
+{
+ int32_t result = 0;
+
+ *bytes = mp4ff_audio_frame_size(f, track, sample);
+
+ if (*bytes==0) return 0;
+
+ *audio_buffer = (uint8_t*)malloc(*bytes);
+
+ mp4ff_set_sample_position(f, track, sample);
+
+ result = mp4ff_read_data(f, *audio_buffer, *bytes);
+
+ if (!result)
+ {
+ free(*audio_buffer);
+ *audio_buffer = 0;
+ return 0;
+ }
+
+#ifdef ITUNES_DRM
+ if (f->track[track]->p_drms != NULL)
+ {
+ drms_decrypt(f->track[track]->p_drms, (uint32_t*)*audio_buffer, *bytes);
+ }
+#endif
+
+ return *bytes;
+}
+
+
+int32_t mp4ff_read_sample_v2(mp4ff_t *f, const int track, const int sample,unsigned char *buffer)
+{
+ int32_t result = 0;
+ int32_t size = mp4ff_audio_frame_size(f,track,sample);
+ if (size<=0) return 0;
+ mp4ff_set_sample_position(f, track, sample);
+ result = mp4ff_read_data(f,buffer,size);
+
+#ifdef ITUNES_DRM
+ if (f->track[track]->p_drms != NULL)
+ {
+ drms_decrypt(f->track[track]->p_drms, (uint32_t*)buffer, size);
+ }
+#endif
+
+ return result;
+}
+
+int32_t mp4ff_read_sample_getsize(mp4ff_t *f, const int track, const int sample)
+{
+ int32_t temp = mp4ff_audio_frame_size(f, track, sample);
+ if (temp<0) temp = 0;
+ return temp;
+}
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