* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <inttypes.h>
+
#include "libavutil/avstring.h"
#include "libavutil/bswap.h"
#include "libavutil/dict.h"
int remaining;
int packet_size;
+ uint32_t handler;
uint32_t scale;
uint32_t rate;
int sample_size; /* size of one sample (or packet)
uint8_t *sub_buffer;
} AVIStream;
-typedef struct {
+typedef struct AVIContext {
int64_t riff_end;
int64_t movi_end;
int64_t fsize;
AVIStream *ast;
int i;
int64_t last_pos = -1;
- int64_t filesize = avio_size(s->pb);
+ int64_t filesize = avi->fsize;
av_dlog(s,
"longs_pre_entry:%d index_type:%d entries_in_use:%d "
return ret;
avi->fsize = avio_size(pb);
- if (avi->fsize <= 0)
+ if (avi->fsize <= 0 || avi->fsize < avi->riff_end)
avi->fsize = avi->riff_end == 8 ? INT64_MAX : avi->riff_end;
/* first list tag */
if (size)
avi->movi_end = avi->movi_list + size + (size & 1);
else
- avi->movi_end = avio_size(pb);
+ avi->movi_end = avi->fsize;
av_dlog(NULL, "movi end=%"PRIx64"\n", avi->movi_end);
goto end_of_header;
} else if (tag1 == MKTAG('I', 'N', 'F', 'O'))
ast = s->streams[0]->priv_data;
av_freep(&s->streams[0]->codec->extradata);
av_freep(&s->streams[0]->codec);
+ av_freep(&s->streams[0]->info);
av_freep(&s->streams[0]);
s->nb_streams = 0;
if (CONFIG_DV_DEMUXER) {
}
assert(stream_index < s->nb_streams);
- st->codec->stream_codec_tag = handler;
+ ast->handler = handler;
avio_rl32(pb); /* flags */
avio_rl16(pb); /* priority */
ast->rate = avio_rl32(pb);
if (!(ast->scale && ast->rate)) {
av_log(s, AV_LOG_WARNING,
- "scale/rate is %u/%u which is invalid. "
+ "scale/rate is %"PRIu32"/%"PRIu32" which is invalid. "
"(This file has been generated by broken software.)\n",
ast->scale,
ast->rate);
/* This is needed to get the pict type which is necessary
* for generating correct pts. */
st->need_parsing = AVSTREAM_PARSE_HEADERS;
+
+ if (st->codec->codec_id == AV_CODEC_ID_MPEG4 &&
+ ast->handler == MKTAG('X', 'V', 'I', 'D'))
+ st->codec->codec_tag = MKTAG('X', 'V', 'I', 'D');
+
// Support "Resolution 1:1" for Avid AVI Codec
if (tag1 == MKTAG('A', 'V', 'R', 'n') &&
st->codec->extradata_size >= 31 &&
st->need_parsing = AVSTREAM_PARSE_NONE;
/* AVI files with Xan DPCM audio (wrongly) declare PCM
* audio in the header but have Axan as stream_code_tag. */
- if (st->codec->stream_codec_tag == AV_RL32("Axan")) {
+ if (ast->handler == AV_RL32("Axan")) {
st->codec->codec_id = AV_CODEC_ID_XAN_DPCM;
st->codec->codec_tag = 0;
}
if (s->error_recognition & AV_EF_EXPLODE)
goto fail;
avi->movi_list = avio_tell(pb) - 4;
- avi->movi_end = avio_size(pb);
+ avi->movi_end = avi->fsize;
goto end_of_header;
}
/* skip tag */
if (!avi->index_loaded && pb->seekable)
avi_load_index(s);
avi->index_loaded = 1;
- avi->non_interleaved |= guess_ni_flag(s);
+
+ if ((ret = guess_ni_flag(s)) < 0)
+ return ret;
+
+ avi->non_interleaved |= ret;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
if (st->nb_index_entries)
int size = avpriv_dv_get_packet(avi->dv_demux, pkt);
if (size >= 0)
return size;
+ else
+ goto resync;
}
if (avi->non_interleaved) {
return 0;
}
+/* Scan the index and consider any file with streams more than
+ * 2 seconds or 64MB apart non-interleaved. */
+static int check_stream_max_drift(AVFormatContext *s)
+{
+ int64_t min_pos, pos;
+ int i;
+ int *idx = av_mallocz_array(s->nb_streams, sizeof(*idx));
+ if (!idx)
+ return AVERROR(ENOMEM);
+
+ for (min_pos = pos = 0; min_pos != INT64_MAX; pos = min_pos + 1LU) {
+ int64_t max_dts = INT64_MIN / 2;
+ int64_t min_dts = INT64_MAX / 2;
+ int64_t max_buffer = 0;
+
+ min_pos = INT64_MAX;
+
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream *st = s->streams[i];
+ AVIStream *ast = st->priv_data;
+ int n = st->nb_index_entries;
+ while (idx[i] < n && st->index_entries[idx[i]].pos < pos)
+ idx[i]++;
+ if (idx[i] < n) {
+ int64_t dts;
+ dts = av_rescale_q(st->index_entries[idx[i]].timestamp /
+ FFMAX(ast->sample_size, 1),
+ st->time_base, AV_TIME_BASE_Q);
+ min_dts = FFMIN(min_dts, dts);
+ min_pos = FFMIN(min_pos, st->index_entries[idx[i]].pos);
+ }
+ }
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream *st = s->streams[i];
+ AVIStream *ast = st->priv_data;
+
+ if (idx[i] && min_dts != INT64_MAX / 2) {
+ int64_t dts;
+ dts = av_rescale_q(st->index_entries[idx[i] - 1].timestamp /
+ FFMAX(ast->sample_size, 1),
+ st->time_base, AV_TIME_BASE_Q);
+ max_dts = FFMAX(max_dts, dts);
+ max_buffer = FFMAX(max_buffer,
+ av_rescale(dts - min_dts,
+ st->codec->bit_rate,
+ AV_TIME_BASE));
+ }
+ }
+ if (max_dts - min_dts > 2 * AV_TIME_BASE ||
+ max_buffer > 1024 * 1024 * 8 * 8) {
+ av_free(idx);
+ return 1;
+ }
+ }
+ av_free(idx);
+ return 0;
+}
+
static int guess_ni_flag(AVFormatContext *s)
{
int i;
first_end = st->index_entries[n - 1].pos;
}
avio_seek(s->pb, oldpos, SEEK_SET);
- return last_start > first_end;
+
+ if (last_start > first_end)
+ return 1;
+
+ return check_stream_max_drift(s);
}
static int avi_load_index(AVFormatContext *s)
.name = "avi",
.long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
.priv_data_size = sizeof(AVIContext),
+ .extensions = "avi",
.read_probe = avi_probe,
.read_header = avi_read_header,
.read_packet = avi_read_packet,
projects / ffmpeg / blobdiff