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[FFmpeg-devel,2/5] avutil/pixdesc: Avoid direct access to pix fmt desc array

Message ID GV1P250MB0737239BB086232B19900BAA8F529@GV1P250MB0737.EURP250.PROD.OUTLOOK.COM
State Accepted
Headers show
Series [FFmpeg-devel,1/5] avutil/pixdesc: Remove always-false checks | expand

Checks

Context Check Description
yinshiyou/make_loongarch64 success Make finished
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andriy/make_x86 success Make finished
andriy/make_fate_x86 success Make fate finished

Commit Message

Andreas Rheinhardt Sept. 26, 2022, 7:58 p.m. UTC
Instead use av_pix_fmt_desc_next(). It is still possible
to check its return values by comparing it with the
(currently) expected values and the code does so.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavutil/pixdesc.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

Comments

Anton Khirnov Sept. 28, 2022, 1:43 p.m. UTC | #1
Quoting Andreas Rheinhardt (2022-09-26 21:58:55)
> Instead use av_pix_fmt_desc_next(). It is still possible
> to check its return values by comparing it with the
> (currently) expected values and the code does so.
> 
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
> ---
>  libavutil/pixdesc.c | 17 ++++++++++++-----
>  1 file changed, 12 insertions(+), 5 deletions(-)
> 
> diff --git a/libavutil/pixdesc.c b/libavutil/pixdesc.c
> index c42a0242c5..f6755f41df 100644
> --- a/libavutil/pixdesc.c
> +++ b/libavutil/pixdesc.c
> @@ -2913,10 +2913,10 @@ int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
>  }
>  
>  void ff_check_pixfmt_descriptors(void){
> -    int i, j;
> +    const AVPixFmtDescriptor *d, *last = NULL;
> +    int i;
>  
> -    for (i=0; i<FF_ARRAY_ELEMS(av_pix_fmt_descriptors); i++) {
> -        const AVPixFmtDescriptor *d = &av_pix_fmt_descriptors[i];
> +    for (i = AV_PIX_FMT_NONE, d = NULL; i++, d = av_pix_fmt_desc_next(d);) {
>          uint8_t fill[4][8+6+3] = {{0}};
>          uint8_t *data[4] = {fill[0], fill[1], fill[2], fill[3]};
>          int linesize[4] = {0,0,0,0};
> @@ -2927,9 +2927,15 @@ void ff_check_pixfmt_descriptors(void){
>          av_assert0(d->log2_chroma_w <= 3);
>          av_assert0(d->log2_chroma_h <= 3);
>          av_assert0(d->nb_components <= 4);
> -        av_assert2(av_get_pix_fmt(d->name) == i);
> +        av_assert2(av_get_pix_fmt(d->name) == av_pix_fmt_desc_get_id(d));
> +
> +        /* The following two checks as well as the one after the loop
> +         * would need to be changed if we changed the way the descriptors
> +         * are stored. */
> +        av_assert0(i == av_pix_fmt_desc_get_id(d));
> +        av_assert0(!last || last + 1 == d);

Don't see last being set.
Andreas Rheinhardt Sept. 28, 2022, 1:49 p.m. UTC | #2
Anton Khirnov:
> Quoting Andreas Rheinhardt (2022-09-26 21:58:55)
>> Instead use av_pix_fmt_desc_next(). It is still possible
>> to check its return values by comparing it with the
>> (currently) expected values and the code does so.
>>
>> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
>> ---
>>  libavutil/pixdesc.c | 17 ++++++++++++-----
>>  1 file changed, 12 insertions(+), 5 deletions(-)
>>
>> diff --git a/libavutil/pixdesc.c b/libavutil/pixdesc.c
>> index c42a0242c5..f6755f41df 100644
>> --- a/libavutil/pixdesc.c
>> +++ b/libavutil/pixdesc.c
>> @@ -2913,10 +2913,10 @@ int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
>>  }
>>  
>>  void ff_check_pixfmt_descriptors(void){
>> -    int i, j;
>> +    const AVPixFmtDescriptor *d, *last = NULL;
>> +    int i;
>>  
>> -    for (i=0; i<FF_ARRAY_ELEMS(av_pix_fmt_descriptors); i++) {
>> -        const AVPixFmtDescriptor *d = &av_pix_fmt_descriptors[i];
>> +    for (i = AV_PIX_FMT_NONE, d = NULL; i++, d = av_pix_fmt_desc_next(d);) {
>>          uint8_t fill[4][8+6+3] = {{0}};
>>          uint8_t *data[4] = {fill[0], fill[1], fill[2], fill[3]};
>>          int linesize[4] = {0,0,0,0};
>> @@ -2927,9 +2927,15 @@ void ff_check_pixfmt_descriptors(void){
>>          av_assert0(d->log2_chroma_w <= 3);
>>          av_assert0(d->log2_chroma_h <= 3);
>>          av_assert0(d->nb_components <= 4);
>> -        av_assert2(av_get_pix_fmt(d->name) == i);
>> +        av_assert2(av_get_pix_fmt(d->name) == av_pix_fmt_desc_get_id(d));
>> +
>> +        /* The following two checks as well as the one after the loop
>> +         * would need to be changed if we changed the way the descriptors
>> +         * are stored. */
>> +        av_assert0(i == av_pix_fmt_desc_get_id(d));
>> +        av_assert0(!last || last + 1 == d);
> 
> Don't see last being set.
> 

Correct. Will fix.

- Andreas
diff mbox series

Patch

diff --git a/libavutil/pixdesc.c b/libavutil/pixdesc.c
index c42a0242c5..f6755f41df 100644
--- a/libavutil/pixdesc.c
+++ b/libavutil/pixdesc.c
@@ -2913,10 +2913,10 @@  int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
 }
 
 void ff_check_pixfmt_descriptors(void){
-    int i, j;
+    const AVPixFmtDescriptor *d, *last = NULL;
+    int i;
 
-    for (i=0; i<FF_ARRAY_ELEMS(av_pix_fmt_descriptors); i++) {
-        const AVPixFmtDescriptor *d = &av_pix_fmt_descriptors[i];
+    for (i = AV_PIX_FMT_NONE, d = NULL; i++, d = av_pix_fmt_desc_next(d);) {
         uint8_t fill[4][8+6+3] = {{0}};
         uint8_t *data[4] = {fill[0], fill[1], fill[2], fill[3]};
         int linesize[4] = {0,0,0,0};
@@ -2927,9 +2927,15 @@  void ff_check_pixfmt_descriptors(void){
         av_assert0(d->log2_chroma_w <= 3);
         av_assert0(d->log2_chroma_h <= 3);
         av_assert0(d->nb_components <= 4);
-        av_assert2(av_get_pix_fmt(d->name) == i);
+        av_assert2(av_get_pix_fmt(d->name) == av_pix_fmt_desc_get_id(d));
+
+        /* The following two checks as well as the one after the loop
+         * would need to be changed if we changed the way the descriptors
+         * are stored. */
+        av_assert0(i == av_pix_fmt_desc_get_id(d));
+        av_assert0(!last || last + 1 == d);
 
-        for (j=0; j<FF_ARRAY_ELEMS(d->comp); j++) {
+        for (int j = 0; j < FF_ARRAY_ELEMS(d->comp); j++) {
             const AVComponentDescriptor *c = &d->comp[j];
             if(j>=d->nb_components) {
                 av_assert0(!c->plane && !c->step && !c->offset && !c->shift && !c->depth);
@@ -2948,6 +2954,7 @@  void ff_check_pixfmt_descriptors(void){
             av_write_image_line(tmp, data, linesize, d, 0, 0, j, 2);
         }
     }
+    av_assert0(i == AV_PIX_FMT_NB);
 }