* [FFmpeg-devel] [PATCH] avformat/mov: don't assume iloc and iinf entries for each item_id will be in the same order
@ 2025-07-18 0:55 James Almer
2025-07-18 17:48 ` Lynne
0 siblings, 1 reply; 3+ messages in thread
From: James Almer @ 2025-07-18 0:55 UTC (permalink / raw)
To: ffmpeg-devel
Nothing forbids them to be in any order the muxer desires.
Fixes demuxing heif samples generated by S1II.
Signed-off-by: James Almer <jamrial@gmail.com>
---
libavformat/mov.c | 41 ++++++++++++++++++++++++++---------------
1 file changed, 26 insertions(+), 15 deletions(-)
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 836bdfb4e1..ccaa988e4b 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -8739,7 +8739,7 @@ static int mov_read_iloc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
av_log(c->fc, AV_LOG_TRACE, "iloc: item_count %d\n", item_count);
for (int i = 0; i < item_count; i++) {
- HEIFItem *item = c->heif_item[i];
+ HEIFItem *item = NULL;
int item_id = (version < 2) ? avio_rb16(pb) : avio_rb32(pb);
int offset_type = (version > 0) ? avio_rb16(pb) & 0xf : 0;
@@ -8765,8 +8765,14 @@ static int mov_read_iloc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
base_offset > INT64_MAX - extent_offset)
return AVERROR_INVALIDDATA;
- if (!item)
- item = c->heif_item[i] = av_mallocz(sizeof(*item));
+ for (int j = 0; j < c->nb_heif_item; j++) {
+ item = c->heif_item[j];
+ if (!item)
+ item = c->heif_item[j] = av_mallocz(sizeof(*item));
+ else if (item->item_id != item_id)
+ continue;
+ break;
+ }
if (!item)
return AVERROR(ENOMEM);
@@ -8776,18 +8782,18 @@ static int mov_read_iloc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
item->is_idat_relative = 1;
item->extent_length = extent_length;
item->extent_offset = base_offset + extent_offset;
- av_log(c->fc, AV_LOG_TRACE, "iloc: item_idx %d, offset_type %d, "
+ av_log(c->fc, AV_LOG_TRACE, "iloc: item_idx %d, item->item_id %d, offset_type %d, "
"extent_offset %"PRId64", extent_length %"PRId64"\n",
- i, offset_type, item->extent_offset, item->extent_length);
+ i, item->item_id, offset_type, item->extent_offset, item->extent_length);
}
c->found_iloc = 1;
return atom.size;
}
-static int mov_read_infe(MOVContext *c, AVIOContext *pb, MOVAtom atom, int idx)
+static int mov_read_infe(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
- HEIFItem *item;
+ HEIFItem *item = NULL;
AVBPrint item_name;
int64_t size = atom.size;
uint32_t item_type;
@@ -8827,22 +8833,27 @@ static int mov_read_infe(MOVContext *c, AVIOContext *pb, MOVAtom atom, int idx)
if (size > 0)
avio_skip(pb, size);
- item = c->heif_item[idx];
- if (!item)
- item = c->heif_item[idx] = av_mallocz(sizeof(*item));
+ for (int i = 0; i < c->nb_heif_item; i++) {
+ item = c->heif_item[i];
+ if (!item)
+ item = c->heif_item[i] = av_mallocz(sizeof(*item));
+ else if (item->item_id != item_id)
+ continue;
+ break;
+ }
if (!item)
return AVERROR(ENOMEM);
if (ret)
- av_bprint_finalize(&item_name, &c->heif_item[idx]->name);
- c->heif_item[idx]->item_id = item_id;
- c->heif_item[idx]->type = item_type;
+ av_bprint_finalize(&item_name, &item->name);
+ item->item_id = item_id;
+ item->type = item_type;
switch (item_type) {
case MKTAG('a','v','0','1'):
case MKTAG('j','p','e','g'):
case MKTAG('h','v','c','1'):
- ret = heif_add_stream(c, c->heif_item[idx]);
+ ret = heif_add_stream(c, item);
if (ret < 0)
return ret;
break;
@@ -8884,7 +8895,7 @@ static int mov_read_iinf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
ret = AVERROR_INVALIDDATA;
goto fail;
}
- ret = mov_read_infe(c, pb, infe, i);
+ ret = mov_read_infe(c, pb, infe);
if (ret < 0)
goto fail;
if (!ret)
--
2.50.1
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [FFmpeg-devel] [PATCH] avformat/mov: don't assume iloc and iinf entries for each item_id will be in the same order
2025-07-18 0:55 [FFmpeg-devel] [PATCH] avformat/mov: don't assume iloc and iinf entries for each item_id will be in the same order James Almer
@ 2025-07-18 17:48 ` Lynne
2025-07-18 18:00 ` Eric Joyner
0 siblings, 1 reply; 3+ messages in thread
From: Lynne @ 2025-07-18 17:48 UTC (permalink / raw)
To: ffmpeg-devel
On 18/07/2025 09:55, James Almer wrote:
> Nothing forbids them to be in any order the muxer desires.
>
> Fixes demuxing heif samples generated by S1II.
>
> Signed-off-by: James Almer <jamrial@gmail.com>
> ---
> libavformat/mov.c | 41 ++++++++++++++++++++++++++---------------
> 1 file changed, 26 insertions(+), 15 deletions(-)
>
> diff --git a/libavformat/mov.c b/libavformat/mov.c
> index 836bdfb4e1..ccaa988e4b 100644
> --- a/libavformat/mov.c
> +++ b/libavformat/mov.c
> @@ -8739,7 +8739,7 @@ static int mov_read_iloc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
>
> av_log(c->fc, AV_LOG_TRACE, "iloc: item_count %d\n", item_count);
> for (int i = 0; i < item_count; i++) {
> - HEIFItem *item = c->heif_item[i];
> + HEIFItem *item = NULL;
> int item_id = (version < 2) ? avio_rb16(pb) : avio_rb32(pb);
> int offset_type = (version > 0) ? avio_rb16(pb) & 0xf : 0;
>
> @@ -8765,8 +8765,14 @@ static int mov_read_iloc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
> base_offset > INT64_MAX - extent_offset)
> return AVERROR_INVALIDDATA;
>
> - if (!item)
> - item = c->heif_item[i] = av_mallocz(sizeof(*item));
> + for (int j = 0; j < c->nb_heif_item; j++) {
> + item = c->heif_item[j];
> + if (!item)
> + item = c->heif_item[j] = av_mallocz(sizeof(*item));
> + else if (item->item_id != item_id)
> + continue;
> + break;
> + }
> if (!item)
> return AVERROR(ENOMEM);
>
> @@ -8776,18 +8782,18 @@ static int mov_read_iloc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
> item->is_idat_relative = 1;
> item->extent_length = extent_length;
> item->extent_offset = base_offset + extent_offset;
> - av_log(c->fc, AV_LOG_TRACE, "iloc: item_idx %d, offset_type %d, "
> + av_log(c->fc, AV_LOG_TRACE, "iloc: item_idx %d, item->item_id %d, offset_type %d, "
> "extent_offset %"PRId64", extent_length %"PRId64"\n",
> - i, offset_type, item->extent_offset, item->extent_length);
> + i, item->item_id, offset_type, item->extent_offset, item->extent_length);
> }
>
> c->found_iloc = 1;
> return atom.size;
> }
>
> -static int mov_read_infe(MOVContext *c, AVIOContext *pb, MOVAtom atom, int idx)
> +static int mov_read_infe(MOVContext *c, AVIOContext *pb, MOVAtom atom)
> {
> - HEIFItem *item;
> + HEIFItem *item = NULL;
> AVBPrint item_name;
> int64_t size = atom.size;
> uint32_t item_type;
> @@ -8827,22 +8833,27 @@ static int mov_read_infe(MOVContext *c, AVIOContext *pb, MOVAtom atom, int idx)
> if (size > 0)
> avio_skip(pb, size);
>
> - item = c->heif_item[idx];
> - if (!item)
> - item = c->heif_item[idx] = av_mallocz(sizeof(*item));
> + for (int i = 0; i < c->nb_heif_item; i++) {
> + item = c->heif_item[i];
> + if (!item)
> + item = c->heif_item[i] = av_mallocz(sizeof(*item));
> + else if (item->item_id != item_id)
> + continue;
> + break;
> + }
> if (!item)
> return AVERROR(ENOMEM);
>
> if (ret)
> - av_bprint_finalize(&item_name, &c->heif_item[idx]->name);
> - c->heif_item[idx]->item_id = item_id;
> - c->heif_item[idx]->type = item_type;
> + av_bprint_finalize(&item_name, &item->name);
> + item->item_id = item_id;
> + item->type = item_type;
>
> switch (item_type) {
> case MKTAG('a','v','0','1'):
> case MKTAG('j','p','e','g'):
> case MKTAG('h','v','c','1'):
> - ret = heif_add_stream(c, c->heif_item[idx]);
> + ret = heif_add_stream(c, item);
> if (ret < 0)
> return ret;
> break;
> @@ -8884,7 +8895,7 @@ static int mov_read_iinf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
> ret = AVERROR_INVALIDDATA;
> goto fail;
> }
> - ret = mov_read_infe(c, pb, infe, i);
> + ret = mov_read_infe(c, pb, infe);
> if (ret < 0)
> goto fail;
> if (!ret)
Thanks, works perfectly when combined with the other 2 patches, all
thumbnails and streams are demuxed properly.
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [FFmpeg-devel] [PATCH] avformat/mov: don't assume iloc and iinf entries for each item_id will be in the same order
2025-07-18 17:48 ` Lynne
@ 2025-07-18 18:00 ` Eric Joyner
0 siblings, 0 replies; 3+ messages in thread
From: Eric Joyner @ 2025-07-18 18:00 UTC (permalink / raw)
To: ffmpeg-devel
On 7/18/2025 10:48 AM, Lynne wrote:
> On 18/07/2025 09:55, James Almer wrote:
>> Nothing forbids them to be in any order the muxer desires.
>>
>> Fixes demuxing heif samples generated by S1II.
>>
>> Signed-off-by: James Almer <jamrial@gmail.com>
>> ---
>> libavformat/mov.c | 41 ++++++++++++++++++++++++++---------------
>> 1 file changed, 26 insertions(+), 15 deletions(-)
>>
>> diff --git a/libavformat/mov.c b/libavformat/mov.c
>> index 836bdfb4e1..ccaa988e4b 100644
>> --- a/libavformat/mov.c
>> +++ b/libavformat/mov.c
>> @@ -8739,7 +8739,7 @@ static int mov_read_iloc(MOVContext *c,
>> AVIOContext *pb, MOVAtom atom)
>> av_log(c->fc, AV_LOG_TRACE, "iloc: item_count %d\n",
>> item_count);
>> for (int i = 0; i < item_count; i++) {
>> - HEIFItem *item = c->heif_item[i];
>> + HEIFItem *item = NULL;
>> int item_id = (version < 2) ? avio_rb16(pb) : avio_rb32(pb);
>> int offset_type = (version > 0) ? avio_rb16(pb) & 0xf : 0;
>> @@ -8765,8 +8765,14 @@ static int mov_read_iloc(MOVContext *c,
>> AVIOContext *pb, MOVAtom atom)
>> base_offset > INT64_MAX - extent_offset)
>> return AVERROR_INVALIDDATA;
>> - if (!item)
>> - item = c->heif_item[i] = av_mallocz(sizeof(*item));
>> + for (int j = 0; j < c->nb_heif_item; j++) {
>> + item = c->heif_item[j];
>> + if (!item)
>> + item = c->heif_item[j] = av_mallocz(sizeof(*item));
>> + else if (item->item_id != item_id)
>> + continue;
>> + break;
>> + }
>> if (!item)
>> return AVERROR(ENOMEM);
>> @@ -8776,18 +8782,18 @@ static int mov_read_iloc(MOVContext *c,
>> AVIOContext *pb, MOVAtom atom)
>> item->is_idat_relative = 1;
>> item->extent_length = extent_length;
>> item->extent_offset = base_offset + extent_offset;
>> - av_log(c->fc, AV_LOG_TRACE, "iloc: item_idx %d, offset_type
>> %d, "
>> + av_log(c->fc, AV_LOG_TRACE, "iloc: item_idx %d,
>> item->item_id %d, offset_type %d, "
>> "extent_offset %"PRId64",
>> extent_length %"PRId64"\n",
>> - i, offset_type, item->extent_offset,
>> item->extent_length);
>> + i, item->item_id, offset_type, item->extent_offset,
>> item->extent_length);
>> }
>> c->found_iloc = 1;
>> return atom.size;
>> }
>> -static int mov_read_infe(MOVContext *c, AVIOContext *pb, MOVAtom
>> atom, int idx)
>> +static int mov_read_infe(MOVContext *c, AVIOContext *pb, MOVAtom atom)
>> {
>> - HEIFItem *item;
>> + HEIFItem *item = NULL;
>> AVBPrint item_name;
>> int64_t size = atom.size;
>> uint32_t item_type;
>> @@ -8827,22 +8833,27 @@ static int mov_read_infe(MOVContext *c,
>> AVIOContext *pb, MOVAtom atom, int idx)
>> if (size > 0)
>> avio_skip(pb, size);
>> - item = c->heif_item[idx];
>> - if (!item)
>> - item = c->heif_item[idx] = av_mallocz(sizeof(*item));
>> + for (int i = 0; i < c->nb_heif_item; i++) {
>> + item = c->heif_item[i];
>> + if (!item)
>> + item = c->heif_item[i] = av_mallocz(sizeof(*item));
>> + else if (item->item_id != item_id)
>> + continue;
>> + break;
>> + }
>> if (!item)
>> return AVERROR(ENOMEM);
>> if (ret)
>> - av_bprint_finalize(&item_name, &c->heif_item[idx]->name);
>> - c->heif_item[idx]->item_id = item_id;
>> - c->heif_item[idx]->type = item_type;
>> + av_bprint_finalize(&item_name, &item->name);
>> + item->item_id = item_id;
>> + item->type = item_type;
>> switch (item_type) {
>> case MKTAG('a','v','0','1'):
>> case MKTAG('j','p','e','g'):
>> case MKTAG('h','v','c','1'):
>> - ret = heif_add_stream(c, c->heif_item[idx]);
>> + ret = heif_add_stream(c, item);
>> if (ret < 0)
>> return ret;
>> break;
>> @@ -8884,7 +8895,7 @@ static int mov_read_iinf(MOVContext *c,
>> AVIOContext *pb, MOVAtom atom)
>> ret = AVERROR_INVALIDDATA;
>> goto fail;
>> }
>> - ret = mov_read_infe(c, pb, infe, i);
>> + ret = mov_read_infe(c, pb, infe);
>> if (ret < 0)
>> goto fail;
>> if (!ret)
>
> Thanks, works perfectly when combined with the other 2 patches, all
> thumbnails and streams are demuxed properly.
Cool, I'm glad that got fixed!
- Eric
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2025-07-18 0:55 [FFmpeg-devel] [PATCH] avformat/mov: don't assume iloc and iinf entries for each item_id will be in the same order James Almer
2025-07-18 17:48 ` Lynne
2025-07-18 18:00 ` Eric Joyner
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