* Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@free.fr>
* Copyright (c) 2009 Alex Converse <alex.converse@gmail.com>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
return 0;
}
-const int ff_mpeg4audio_sample_rates[16] = {
+const int avpriv_mpeg4audio_sample_rates[16] = {
96000, 88200, 64000, 48000, 44100, 32000,
24000, 22050, 16000, 12000, 11025, 8000, 7350
};
{
*index = get_bits(gb, 4);
return *index == 0x0f ? get_bits(gb, 24) :
- ff_mpeg4audio_sample_rates[*index];
+ avpriv_mpeg4audio_sample_rates[*index];
}
-int ff_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, int buf_size)
+int avpriv_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf,
+ int bit_size, int sync_extension)
{
GetBitContext gb;
- int specific_config_bitindex;
+ int specific_config_bitindex, ret;
- init_get_bits(&gb, buf, buf_size*8);
+ ret = init_get_bits(&gb, buf, bit_size);
+ if (ret < 0)
+ return ret;
c->object_type = get_object_type(&gb);
c->sample_rate = get_sample_rate(&gb, &c->sampling_index);
c->chan_config = get_bits(&gb, 4);
if (c->chan_config < FF_ARRAY_ELEMS(ff_mpeg4audio_channels))
c->channels = ff_mpeg4audio_channels[c->chan_config];
c->sbr = -1;
- if (c->object_type == AOT_SBR) {
- c->ext_object_type = c->object_type;
+ c->ps = -1;
+ if (c->object_type == AOT_SBR || (c->object_type == AOT_PS &&
+ // check for W6132 Annex YYYY draft MP3onMP4
+ !(show_bits(&gb, 3) & 0x03 && !(show_bits(&gb, 9) & 0x3F)))) {
+ if (c->object_type == AOT_PS)
+ c->ps = 1;
+ c->ext_object_type = AOT_SBR;
c->sbr = 1;
c->ext_sample_rate = get_sample_rate(&gb, &c->ext_sampling_index);
c->object_type = get_object_type(&gb);
return -1;
}
- if (c->ext_object_type != AOT_SBR) {
- int bits_left = buf_size*8 - get_bits_count(&gb);
- for (; bits_left > 15; bits_left--) {
+ if (c->ext_object_type != AOT_SBR && sync_extension) {
+ while (get_bits_left(&gb) > 15) {
if (show_bits(&gb, 11) == 0x2b7) { // sync extension
get_bits(&gb, 11);
c->ext_object_type = get_object_type(&gb);
if (c->ext_object_type == AOT_SBR && (c->sbr = get_bits1(&gb)) == 1)
c->ext_sample_rate = get_sample_rate(&gb, &c->ext_sampling_index);
+ if (get_bits_left(&gb) > 11 && get_bits(&gb, 11) == 0x548)
+ c->ps = get_bits1(&gb);
break;
} else
get_bits1(&gb); // skip 1 bit
}
}
+
+ //PS requires SBR
+ if (!c->sbr)
+ c->ps = 0;
+ //Limit implicit PS to the HE-AACv2 Profile
+ if ((c->ps == -1 && c->object_type != AOT_AAC_LC) || c->channels & ~0x01)
+ c->ps = 0;
+
return specific_config_bitindex;
}
return el;
}
-int ff_copy_pce_data(PutBitContext *pb, GetBitContext *gb)
+int avpriv_copy_pce_data(PutBitContext *pb, GetBitContext *gb)
{
int five_bit_ch, four_bit_ch, comment_size, bits;
int offset = put_bits_count(pb);
copy_bits(pb, gb, 16);
if (bits)
copy_bits(pb, gb, bits);
- align_put_bits(pb);
+ avpriv_align_put_bits(pb);
align_get_bits(gb);
comment_size = copy_bits(pb, gb, 8);
for (; comment_size > 0; comment_size--)