--- /dev/null
+/*
+ * raw ADTS AAC demuxer
+ * Copyright (c) 2008 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2009 Robert Swain ( rob opendot cl )
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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,
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+#include "raw.h"
+#include "id3v2.h"
+#include "id3v1.h"
+
+
+static int adts_aac_probe(AVProbeData *p)
+{
+ int max_frames = 0, first_frames = 0;
+ int fsize, frames;
+ uint8_t *buf0 = p->buf;
+ uint8_t *buf2;
+ uint8_t *buf;
+ uint8_t *end = buf0 + p->buf_size - 7;
+
+ if (ff_id3v2_match(buf0, ID3v2_DEFAULT_MAGIC)) {
+ buf0 += ff_id3v2_tag_len(buf0);
+ }
+ buf = buf0;
+
+ for(; buf < end; buf= buf2+1) {
+ buf2 = buf;
+
+ for(frames = 0; buf2 < end; frames++) {
+ uint32_t header = AV_RB16(buf2);
+ if((header&0xFFF6) != 0xFFF0)
+ break;
+ fsize = (AV_RB32(buf2+3)>>13) & 0x8FFF;
+ if(fsize < 7)
+ break;
+ buf2 += fsize;
+ }
+ max_frames = FFMAX(max_frames, frames);
+ if(buf == buf0)
+ first_frames= frames;
+ }
+ if (first_frames>=3) return AVPROBE_SCORE_MAX/2+1;
+ else if(max_frames>500)return AVPROBE_SCORE_MAX/2;
+ else if(max_frames>=3) return AVPROBE_SCORE_MAX/4;
+ else if(max_frames>=1) return 1;
+ else return 0;
+}
+
+static int adts_aac_read_header(AVFormatContext *s,
+ AVFormatParameters *ap)
+{
+ AVStream *st;
+
+ st = av_new_stream(s, 0);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_id = s->iformat->value;
+ st->need_parsing = AVSTREAM_PARSE_FULL;
+
+ ff_id3v1_read(s);
+ ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC);
+
+ return 0;
+}
+
+AVInputFormat aac_demuxer = {
+ "aac",
+ NULL_IF_CONFIG_SMALL("raw ADTS AAC"),
+ 0,
+ adts_aac_probe,
+ adts_aac_read_header,
+ ff_raw_read_partial_packet,
+ .flags= AVFMT_GENERIC_INDEX,
+ .extensions = "aac",
+ .value = CODEC_ID_AAC,
+};
}
#endif
-#if CONFIG_AAC_DEMUXER
-static int adts_aac_probe(AVProbeData *p)
-{
- int max_frames = 0, first_frames = 0;
- int fsize, frames;
- uint8_t *buf0 = p->buf;
- uint8_t *buf2;
- uint8_t *buf;
- uint8_t *end = buf0 + p->buf_size - 7;
-
- if (ff_id3v2_match(buf0, ID3v2_DEFAULT_MAGIC)) {
- buf0 += ff_id3v2_tag_len(buf0);
- }
- buf = buf0;
-
- for(; buf < end; buf= buf2+1) {
- buf2 = buf;
-
- for(frames = 0; buf2 < end; frames++) {
- uint32_t header = AV_RB16(buf2);
- if((header&0xFFF6) != 0xFFF0)
- break;
- fsize = (AV_RB32(buf2+3)>>13) & 0x8FFF;
- if(fsize < 7)
- break;
- buf2 += fsize;
- }
- max_frames = FFMAX(max_frames, frames);
- if(buf == buf0)
- first_frames= frames;
- }
- if (first_frames>=3) return AVPROBE_SCORE_MAX/2+1;
- else if(max_frames>500)return AVPROBE_SCORE_MAX/2;
- else if(max_frames>=3) return AVPROBE_SCORE_MAX/4;
- else if(max_frames>=1) return 1;
- else return 0;
-}
-
-static int adts_aac_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
-{
- AVStream *st;
-
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR(ENOMEM);
-
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_id = s->iformat->value;
- st->need_parsing = AVSTREAM_PARSE_FULL;
-
- ff_id3v1_read(s);
- ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC);
-
- return 0;
-}
-
-#endif
-
/* Note: Do not forget to add new entries to the Makefile as well. */
-#if CONFIG_AAC_DEMUXER
-AVInputFormat aac_demuxer = {
- "aac",
- NULL_IF_CONFIG_SMALL("raw ADTS AAC"),
- 0,
- adts_aac_probe,
- adts_aac_read_header,
- ff_raw_read_partial_packet,
- .flags= AVFMT_GENERIC_INDEX,
- .extensions = "aac",
- .value = CODEC_ID_AAC,
-};
-#endif
-
#if CONFIG_AC3_DEMUXER
AVInputFormat ac3_demuxer = {
"ac3",