* TTA demuxer
* Copyright (c) 2006 Alex Beregszaszi
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavcodec/get_bits.h"
+#include "apetag.h"
#include "avformat.h"
+#include "avio_internal.h"
#include "internal.h"
#include "id3v1.h"
+#include "libavutil/crc.h"
#include "libavutil/dict.h"
typedef struct TTAContext {
int last_frame_size;
} TTAContext;
-static int tta_probe(AVProbeData *p)
+static unsigned long tta_check_crc(unsigned long checksum, const uint8_t *buf,
+ unsigned int len)
{
- const uint8_t *d = p->buf;
+ return av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), checksum, buf, len);
+}
- if (d[0] == 'T' && d[1] == 'T' && d[2] == 'A' && d[3] == '1')
+static int tta_probe(AVProbeData *p)
+{
+ if (AV_RL32(&p->buf[0]) == MKTAG('T', 'T', 'A', '1') &&
+ (AV_RL16(&p->buf[4]) == 1 || AV_RL16(&p->buf[4]) == 2) &&
+ AV_RL16(&p->buf[6]) > 0 &&
+ AV_RL16(&p->buf[8]) > 0 &&
+ AV_RL32(&p->buf[10]) > 0)
return AVPROBE_SCORE_EXTENSION + 30;
return 0;
}
{
TTAContext *c = s->priv_data;
AVStream *st;
- int i, channels, bps, samplerate, datalen;
+ int i, channels, bps, samplerate;
int64_t framepos, start_offset;
+ uint32_t nb_samples, crc;
- if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
- ff_id3v1_read(s);
+ ff_id3v1_read(s);
start_offset = avio_tell(s->pb);
if (start_offset < 0)
return start_offset;
+ ffio_init_checksum(s->pb, tta_check_crc, UINT32_MAX);
if (avio_rl32(s->pb) != AV_RL32("TTA1"))
- return -1; // not tta file
+ return AVERROR_INVALIDDATA;
avio_skip(s->pb, 2); // FIXME: flags
channels = avio_rl16(s->pb);
samplerate = avio_rl32(s->pb);
if(samplerate <= 0 || samplerate > 1000000){
av_log(s, AV_LOG_ERROR, "nonsense samplerate\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
- datalen = avio_rl32(s->pb);
- if(datalen < 0){
- av_log(s, AV_LOG_ERROR, "nonsense datalen\n");
- return -1;
+ nb_samples = avio_rl32(s->pb);
+ if (!nb_samples) {
+ av_log(s, AV_LOG_ERROR, "invalid number of samples\n");
+ return AVERROR_INVALIDDATA;
}
- avio_skip(s->pb, 4); // header crc
+ crc = ffio_get_checksum(s->pb) ^ UINT32_MAX;
+ if (crc != avio_rl32(s->pb) && s->error_recognition & AV_EF_CRCCHECK) {
+ av_log(s, AV_LOG_ERROR, "Header CRC error\n");
+ return AVERROR_INVALIDDATA;
+ }
c->frame_size = samplerate * 256 / 245;
- c->last_frame_size = datalen % c->frame_size;
+ c->last_frame_size = nb_samples % c->frame_size;
if (!c->last_frame_size)
c->last_frame_size = c->frame_size;
- c->totalframes = datalen / c->frame_size + (c->last_frame_size < c->frame_size);
+ c->totalframes = nb_samples / c->frame_size + (c->last_frame_size < c->frame_size);
c->currentframe = 0;
- if(c->totalframes >= UINT_MAX/sizeof(uint32_t)){
- av_log(s, AV_LOG_ERROR, "totalframes too large\n");
- return -1;
+ if(c->totalframes >= UINT_MAX/sizeof(uint32_t) || c->totalframes <= 0){
+ av_log(s, AV_LOG_ERROR, "totalframes %d invalid\n", c->totalframes);
+ return AVERROR_INVALIDDATA;
}
st = avformat_new_stream(s, NULL);
avpriv_set_pts_info(st, 64, 1, samplerate);
st->start_time = 0;
- st->duration = datalen;
+ st->duration = nb_samples;
framepos = avio_tell(s->pb);
if (framepos < 0)
return framepos;
framepos += 4 * c->totalframes + 4;
+ if (ff_alloc_extradata(st->codecpar, avio_tell(s->pb) - start_offset))
+ return AVERROR(ENOMEM);
+
+ avio_seek(s->pb, start_offset, SEEK_SET);
+ avio_read(s->pb, st->codecpar->extradata, st->codecpar->extradata_size);
+
+ ffio_init_checksum(s->pb, tta_check_crc, UINT32_MAX);
for (i = 0; i < c->totalframes; i++) {
uint32_t size = avio_rl32(s->pb);
- av_add_index_entry(st, framepos, i * c->frame_size, size, 0,
- AVINDEX_KEYFRAME);
+ int r;
+ if ((r = av_add_index_entry(st, framepos, i * c->frame_size, size, 0,
+ AVINDEX_KEYFRAME)) < 0)
+ return r;
framepos += size;
}
- avio_skip(s->pb, 4); // seektable crc
+ crc = ffio_get_checksum(s->pb) ^ UINT32_MAX;
+ if (crc != avio_rl32(s->pb) && s->error_recognition & AV_EF_CRCCHECK) {
+ av_log(s, AV_LOG_ERROR, "Seek table CRC error\n");
+ return AVERROR_INVALIDDATA;
+ }
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_TTA;
st->codecpar->sample_rate = samplerate;
st->codecpar->bits_per_coded_sample = bps;
- st->codecpar->extradata_size = avio_tell(s->pb) - start_offset;
- if (st->codecpar->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codecpar->extradata_size) {
- //this check is redundant as avio_read should fail
- av_log(s, AV_LOG_ERROR, "extradata_size too large\n");
- return -1;
- }
- st->codecpar->extradata = av_mallocz(st->codecpar->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
- if (!st->codecpar->extradata) {
- st->codecpar->extradata_size = 0;
- return AVERROR(ENOMEM);
+ if (s->pb->seekable) {
+ int64_t pos = avio_tell(s->pb);
+ ff_ape_parse_tag(s);
+ avio_seek(s->pb, pos, SEEK_SET);
}
- avio_seek(s->pb, start_offset, SEEK_SET);
- avio_read(s->pb, st->codecpar->extradata, st->codecpar->extradata_size);
return 0;
}
if (c->currentframe >= c->totalframes)
return AVERROR_EOF;
+ if (st->nb_index_entries < c->totalframes) {
+ av_log(s, AV_LOG_ERROR, "Index entry disappeared\n");
+ return AVERROR_INVALIDDATA;
+ }
+
size = st->index_entries[c->currentframe].size;
ret = av_get_packet(s->pb, pkt, size);
projects / ffmpeg / blobdiff