[PATCH v3 07/10] topology: decode: Fix decoding PCM formats and rates

[Pierre-Louis Bossart]

On 7/14/20 6:25 AM, Piotr Maziarz wrote:
> Not checking _LAST format and rate, which are valid indexes in arrays,
> makes data loss while converting binary to standard ALSA configuration
> file.

I must be really thick on this one.

alsatplg converts from alsa-conf format to binary topology file.
The binary topology file is used by drivers.

In which cases would you convert from binary to alsa-conf files? And 
what tool would you use?


> Signed-off-by: Piotr Maziarz <piotrx.maziarz at linux.intel.com>
> ---
>   src/topology/pcm.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/src/topology/pcm.c b/src/topology/pcm.c
> index b15b950..db40114 100644
> --- a/src/topology/pcm.c
> +++ b/src/topology/pcm.c
> @@ -549,7 +549,7 @@ int tplg_save_stream_caps(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
>   	if (err >= 0 && sc->formats) {
>   		err = tplg_save_printf(dst, pfx, "\tformats '");
>   		first = 1;
> -		for (i = 0; err >= 0 && i < SND_PCM_FORMAT_LAST; i++) {
> +		for (i = 0; err >= 0 && i <= SND_PCM_FORMAT_LAST; i++) {
>   			if (sc->formats & (1ULL << i)) {
>   				s = snd_pcm_format_name(i);
>   				err = tplg_save_printf(dst, NULL, "%s%s",
> @@ -563,7 +563,7 @@ int tplg_save_stream_caps(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
>   	if (err >= 0 && sc->rates) {
>   		err = tplg_save_printf(dst, pfx, "\trates '");
>   		first = 1;
> -		for (i = 0; err >= 0 && i < SND_PCM_RATE_LAST; i++) {
> +		for (i = 0; err >= 0 && i <= SND_PCM_RATE_LAST; i++) {
>   			if (sc->rates & (1ULL << i)) {
>   				s = get_rate_name(i);
>   				err = tplg_save_printf(dst, NULL, "%s%s",
>