* AVI demuxer
* Copyright (c) 2001 Fabrice Bellard
*
- * 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 "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/bswap.h"
+#include "libavutil/opt.h"
#include "libavutil/dict.h"
#include "libavutil/avstring.h"
#include "avformat.h"
AVFormatContext *sub_ctx;
AVPacket sub_pkt;
uint8_t *sub_buffer;
+
+ int64_t seek_pos;
} AVIStream;
typedef struct {
+ const AVClass *class;
int64_t riff_end;
int64_t movi_end;
int64_t fsize;
int stream_index;
DVDemuxContext* dv_demux;
int odml_depth;
+ int use_odml;
#define MAX_ODML_DEPTH 1000
+ int64_t dts_max;
} AVIContext;
+
+static const AVOption options[] = {
+ { "use_odml", "use odml index", offsetof(AVIContext, use_odml), AV_OPT_TYPE_INT, {.dbl = 1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM},
+ { NULL },
+};
+
+static const AVClass demuxer_class = {
+ "AVI demuxer",
+ av_default_item_name,
+ options,
+ LIBAVUTIL_VERSION_INT,
+};
+
+
static const char avi_headers[][8] = {
{ 'R', 'I', 'F', 'F', 'A', 'V', 'I', ' ' },
{ 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X' },
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 chunk_id:%X base:%16"PRIX64"\n",
longs_pre_entry,index_type, entries_in_use, chunk_id, base);
int key= len >= 0;
len &= 0x7FFFFFFF;
- av_dlog(s, "pos:%"PRId64", len:%X\n", pos, len);
-
- if(pb->eof_reached)
+#ifdef DEBUG_SEEK
+ av_log(s, AV_LOG_ERROR, "pos:%"PRId64", len:%X\n", pos, len);
+#endif
+ if(url_feof(pb))
return -1;
if(last_pos == pos || pos == base - 8)
avio_rl32(pb); /* size */
duration = avio_rl32(pb);
- if(pb->eof_reached)
+ if(url_feof(pb))
return -1;
pos = avio_tell(pb);
return -1;
}
- avio_seek(pb, offset+8, SEEK_SET);
+ if(avio_seek(pb, offset+8, SEEK_SET) < 0)
+ return -1;
avi->odml_depth++;
read_braindead_odml_indx(s, frame_num);
avi->odml_depth--;
frame_num += duration;
- avio_seek(pb, pos, SEEK_SET);
+ if(avio_seek(pb, pos, SEEK_SET) < 0) {
+ av_log(s, AV_LOG_ERROR, "Failed to restore position after reading index");
+ return -1;
+ }
+
}
}
- avi->index_loaded=1;
+ avi->index_loaded=2;
return 0;
}
if (get_riff(s, pb) < 0)
return -1;
+ av_log(avi, AV_LOG_DEBUG, "use odml:%d\n", avi->use_odml);
+
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 */
codec_type = -1;
frame_period = 0;
for(;;) {
- if (pb->eof_reached)
+ if (url_feof(pb))
goto fail;
tag = avio_rl32(pb);
size = avio_rl32(pb);
if (tag1 == MKTAG('m', 'o', 'v', 'i')) {
avi->movi_list = avio_tell(pb) - 4;
if(size) avi->movi_end = avi->movi_list + size + (size & 1);
- else avi->movi_end = avio_size(pb);
+ else avi->movi_end = avi->fsize;
av_dlog(NULL, "movi end=%"PRIx64"\n", avi->movi_end);
goto end_of_header;
}
/* AVI header */
/* using frame_period is bad idea */
frame_period = avio_rl32(pb);
- avio_skip(pb, 4);
+ avio_rl32(pb); /* max. bytes per second */
avio_rl32(pb);
avi->non_interleaved |= avio_rl32(pb) & AVIF_MUSTUSEINDEX;
st->start_time = 0;
avio_rl32(pb); /* buffer size */
avio_rl32(pb); /* quality */
+ if (ast->cum_len*ast->scale/ast->rate > 3600) {
+ av_log(s, AV_LOG_ERROR, "crazy start time, iam scared, giving up\n");
+ return AVERROR_INVALIDDATA;
+ }
ast->sample_size = avio_rl32(pb); /* sample ssize */
ast->cum_len *= FFMAX(1, ast->sample_size);
// av_log(s, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
codec_type = AVMEDIA_TYPE_DATA;
break;
default:
- av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
- goto fail;
+ av_log(s, AV_LOG_INFO, "unknown stream type %X\n", tag1);
}
if(ast->sample_size == 0)
st->duration = st->nb_frames;
break;
case MKTAG('s', 't', 'r', 'f'):
/* stream header */
+ if (!size)
+ break;
if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) {
avio_skip(pb, size);
} else {
break;
}
- if(size > 10*4 && size<(1<<30)){
+ if(size > 10*4 && size<(1<<30) && size < avi->fsize){
st->codec->extradata_size= size - 10*4;
st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata) {
/* Extract palette from extradata if bpp <= 8. */
/* This code assumes that extradata contains only palette. */
- /* This is true for all paletted codecs implemented in Libav. */
+ /* This is true for all paletted codecs implemented in FFmpeg. */
if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
int pal_size = (1 << st->codec->bits_per_coded_sample) << 2;
const uint8_t *pal_src;
pal_size = FFMIN(pal_size, st->codec->extradata_size);
pal_src = st->codec->extradata + st->codec->extradata_size - pal_size;
-#if HAVE_BIGENDIAN
for (i = 0; i < pal_size/4; i++)
- ast->pal[i] = av_bswap32(((uint32_t*)pal_src)[i]);
-#else
- memcpy(ast->pal, pal_src, pal_size);
-#endif
+ ast->pal[i] = 0xFF<<24 | AV_RL32(pal_src+4*i);
ast->has_pal = 1;
}
if(st->codec->codec_tag==0 && st->codec->height > 0 && st->codec->extradata_size < 1U<<30){
st->codec->extradata_size+= 9;
- st->codec->extradata= av_realloc(st->codec->extradata, st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ st->codec->extradata= av_realloc_f(st->codec->extradata, 1, st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if(st->codec->extradata)
memcpy(st->codec->extradata + st->codec->extradata_size - 9, "BottomUp", 9);
}
if (st->codec->stream_codec_tag == AV_RL32("Axan")){
st->codec->codec_id = CODEC_ID_XAN_DPCM;
st->codec->codec_tag = 0;
+ ast->dshow_block_align = 0;
}
if (amv_file_format){
st->codec->codec_id = CODEC_ID_ADPCM_IMA_AMV;
break;
case AVMEDIA_TYPE_SUBTITLE:
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
- st->codec->codec_id = CODEC_ID_PROBE;
+ st->request_probe= 1;
break;
default:
st->codec->codec_type = AVMEDIA_TYPE_DATA;
}
}
break;
+ case MKTAG('s', 't', 'r', 'd'):
+ if (stream_index >= (unsigned)s->nb_streams || s->streams[stream_index]->codec->extradata_size) {
+ avio_skip(pb, size);
+ } else {
+ uint64_t cur_pos = avio_tell(pb);
+ if (cur_pos < list_end)
+ size = FFMIN(size, list_end - cur_pos);
+ st = s->streams[stream_index];
+
+ if(size<(1<<30)){
+ st->codec->extradata_size= size;
+ st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!st->codec->extradata) {
+ st->codec->extradata_size= 0;
+ return AVERROR(ENOMEM);
+ }
+ avio_read(pb, st->codec->extradata, st->codec->extradata_size);
+ }
+
+ if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly
+ avio_r8(pb);
+ }
+ break;
case MKTAG('i', 'n', 'd', 'x'):
i= avio_tell(pb);
- if(pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
- read_braindead_odml_indx(s, 0) < 0 &&
- (s->error_recognition & AV_EF_EXPLODE))
+ if(pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) && avi->use_odml &&
+ read_braindead_odml_indx(s, 0) < 0 && (s->error_recognition & AV_EF_EXPLODE))
goto fail;
avio_seek(pb, i+size, SEEK_SET);
break;
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);
+ avi->index_loaded |= 1;
+ avi->non_interleaved |= guess_ni_flag(s) | (s->flags & AVFMT_FLAG_SORT_DTS);
for(i=0; i<s->nb_streams; i++){
AVStream *st = s->streams[i];
if(st->nb_index_entries)
break;
}
+ // DV-in-AVI cannot be non-interleaved, if set this must be
+ // a mis-detection.
+ if(avi->dv_demux)
+ avi->non_interleaved=0;
if(i==s->nb_streams && avi->non_interleaved) {
av_log(s, AV_LOG_WARNING, "non-interleaved AVI without index, switching to interleaved\n");
avi->non_interleaved=0;
start_sync:
memset(d, -1, sizeof(d));
- for(i=sync=avio_tell(pb); !pb->eof_reached; i++) {
+ for(i=sync=avio_tell(pb); !url_feof(pb); i++) {
int j;
for(j=0; j<7; j++)
avio_rl16(pb); //flags
for (; k <= last; k++)
- ast->pal[k] = avio_rb32(pb)>>8;// b + (g << 8) + (r << 16);
+ ast->pal[k] = 0xFF<<24 | avio_rb32(pb)>>8;// b + (g << 8) + (r << 16);
ast->has_pal= 1;
goto start_sync;
} else if( ((ast->prefix_count<5 || sync+9 > i) && d[2]<128 && d[3]<128) ||
}
}
+ if(pb->error)
+ return pb->error;
return AVERROR_EOF;
}
}
}
if(!best_st)
- return -1;
+ return AVERROR_EOF;
best_ast = best_st->priv_data;
- best_ts = av_rescale_q(best_ts, (AVRational){FFMAX(1, best_ast->sample_size), AV_TIME_BASE}, best_st->time_base);
+ best_ts = best_ast->frame_offset;
if(best_ast->remaining)
i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY | AVSEEK_FLAG_BACKWARD);
else{
if(i>=0){
int64_t pos= best_st->index_entries[i].pos;
pos += best_ast->packet_size - best_ast->remaining;
- avio_seek(s->pb, pos + 8, SEEK_SET);
+ if(avio_seek(s->pb, pos + 8, SEEK_SET) < 0)
+ return AVERROR_EOF;
// av_log(s, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
assert(best_ast->remaining <= best_ast->packet_size);
best_ast->packet_size=
best_ast->remaining= best_st->index_entries[i].size;
}
+ else
+ return AVERROR_EOF;
}
resync:
if (CONFIG_DV_DEMUXER && avi->dv_demux) {
dstr = pkt->destruct;
size = avpriv_dv_produce_packet(avi->dv_demux, pkt,
- pkt->data, pkt->size);
+ pkt->data, pkt->size, pkt->pos);
pkt->destruct = dstr;
pkt->flags |= AV_PKT_FLAG_KEY;
if (size < 0)
e= &st->index_entries[index];
if(index >= 0 && e->timestamp == ast->frame_offset){
+ if (index == st->nb_index_entries-1){
+ int key=1;
+ int i;
+ uint32_t state=-1;
+ for(i=0; i<FFMIN(size,256); i++){
+ if(st->codec->codec_id == CODEC_ID_MPEG4){
+ if(state == 0x1B6){
+ key= !(pkt->data[i]&0xC0);
+ break;
+ }
+ }else
+ break;
+ state= (state<<8) + pkt->data[i];
+ }
+ if(!key)
+ e->flags &= ~AVINDEX_KEYFRAME;
+ }
if (e->flags & AVINDEX_KEYFRAME)
pkt->flags |= AV_PKT_FLAG_KEY;
}
ast->packet_size= 0;
}
+ if(!avi->non_interleaved && pkt->pos >= 0 && ast->seek_pos > pkt->pos){
+ av_free_packet(pkt);
+ goto resync;
+ }
+ ast->seek_pos= 0;
+
+ if(!avi->non_interleaved && st->nb_index_entries>1 && avi->index_loaded>1){
+ int64_t dts= av_rescale_q(pkt->dts, st->time_base, AV_TIME_BASE_Q);
+
+ if(avi->dts_max - dts > 2*AV_TIME_BASE){
+ avi->non_interleaved= 1;
+ av_log(s, AV_LOG_INFO, "Switching to NI mode, due to poor interleaving\n");
+ }else if(avi->dts_max < dts)
+ avi->dts_max = dts;
+ }
+
return size;
}
/* Read the entries and sort them in each stream component. */
for(i = 0; i < nb_index_entries; i++) {
+ if(url_feof(pb))
+ return -1;
+
tag = avio_rl32(pb);
flags = avio_rl32(pb);
pos = avio_rl32(pb);
av_dlog(s, "%d cum_len=%"PRId64"\n", len, ast->cum_len);
- if(pb->eof_reached)
- return -1;
if(last_pos == pos)
avi->non_interleaved= 1;
goto the_end; // maybe truncated file
av_dlog(s, "movi_end=0x%"PRIx64"\n", avi->movi_end);
for(;;) {
- if (pb->eof_reached)
+ if (url_feof(pb))
break;
tag = avio_rl32(pb);
size = avio_rl32(pb);
if (tag == MKTAG('i', 'd', 'x', '1') &&
avi_read_idx1(s, size) >= 0) {
+ avi->index_loaded=2;
ret = 0;
break;
}
AVIContext *avi = s->priv_data;
AVStream *st;
int i, index;
- int64_t pos;
+ int64_t pos, pos_min;
AVIStream *ast;
if (!avi->index_loaded) {
/* we only load the index on demand */
avi_load_index(s);
- avi->index_loaded = 1;
+ avi->index_loaded |= 1;
}
assert(stream_index>= 0);
/* the av_index_search_timestamp call above. */
assert(stream_index == 0);
+ if(avio_seek(s->pb, pos, SEEK_SET) < 0)
+ return -1;
+
/* Feed the DV video stream version of the timestamp to the */
/* DV demux so it can synthesize correct timestamps. */
dv_offset_reset(avi->dv_demux, timestamp);
- avio_seek(s->pb, pos, SEEK_SET);
avi->stream_index= -1;
return 0;
}
+ pos_min= pos;
for(i = 0; i < s->nb_streams; i++) {
AVStream *st2 = s->streams[i];
AVIStream *ast2 = st2->priv_data;
index = av_index_search_timestamp(
st2,
av_rescale_q(timestamp, st->time_base, st2->time_base) * FFMAX(ast2->sample_size, 1),
- flags | AVSEEK_FLAG_BACKWARD);
+ flags | AVSEEK_FLAG_BACKWARD | (st2->codec->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0));
if(index<0)
index=0;
+ ast2->seek_pos= st2->index_entries[index].pos;
+ pos_min= FFMIN(pos_min,ast2->seek_pos);
+ }
+ for(i = 0; i < s->nb_streams; i++) {
+ AVStream *st2 = s->streams[i];
+ AVIStream *ast2 = st2->priv_data;
- if(!avi->non_interleaved){
- while(index>0 && st2->index_entries[index].pos > pos)
- index--;
- while(index+1 < st2->nb_index_entries && st2->index_entries[index].pos < pos)
- index++;
- }
+ if (ast2->sub_ctx || st2->nb_index_entries <= 0)
+ continue;
-// av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %"PRId64"\n", timestamp, index, st2->index_entries[index].timestamp);
- /* extract the current frame number */
+ index = av_index_search_timestamp(
+ st2,
+ av_rescale_q(timestamp, st->time_base, st2->time_base) * FFMAX(ast2->sample_size, 1),
+ flags | AVSEEK_FLAG_BACKWARD | (st2->codec->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0));
+ if(index<0)
+ index=0;
+ while(!avi->non_interleaved && index>0 && st2->index_entries[index-1].pos >= pos_min)
+ index--;
ast2->frame_offset = st2->index_entries[index].timestamp;
}
/* do the seek */
- avio_seek(s->pb, pos, SEEK_SET);
+ if (avio_seek(s->pb, pos_min, SEEK_SET) < 0)
+ return -1;
avi->stream_index= -1;
+ avi->dts_max= INT_MIN;
return 0;
}
.read_packet = avi_read_packet,
.read_close = avi_read_close,
.read_seek = avi_read_seek,
+ .priv_class = &demuxer_class,
};
projects / ffmpeg / blobdiff