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pw-cat: Document numeric WMA constants

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This commit is contained in:
Carlos Rafael Giani 2025-05-29 22:24:31 +02:00
parent 7341cc401b
commit e2731914ad
1 changed files with 29 additions and 13 deletions
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42
src/tools/pw-cat.c
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@ -326,8 +326,6 @@ static int encoded_playback_fill(struct data *d, void *dest, unsigned int n_fram
static int av_codec_params_to_audio_info(struct data *data, AVCodecParameters *codec_params, struct spa_audio_info *info)
{
int32_t profile;
switch (codec_params->codec_id) {
case AV_CODEC_ID_VORBIS:
info->media_subtype = SPA_MEDIA_SUBTYPE_vorbis;
@ -352,32 +350,50 @@ static int av_codec_params_to_audio_info(struct data *data, AVCodecParameters *c
case AV_CODEC_ID_WMAVOICE:
case AV_CODEC_ID_WMALOSSLESS:
info->media_subtype = SPA_MEDIA_SUBTYPE_wma;
info->info.wma.rate = data->rate;
info->info.wma.channels = data->channels;
info->info.wma.bitrate = data->bitrate;
info->info.wma.block_align = codec_params->block_align;
/* The codec tag is not decided by FFmpeg; instead, it is
* directly taken from the container. FFmpeg currently has
* no named constants for the WMA versions, so numeric
* constants have to be used here instead. */
switch (codec_params->codec_tag) {
/* TODO see if these hex constants can be replaced by named constants from FFmpeg */
/* This originates from Microsoft's mmreg.h , where
* 0x160 is specified as meaning WMA v1 (which is commonly
* referred to as WMA 7). */
case 0x160:
info->info.wma.profile = SPA_AUDIO_WMA_PROFILE_WMA7;
break;
/* This originates from Microsoft's mmreg.h , where
* 0x161 is specified as meaning WMA v2 (which is commonly
* referred to as WMA 8 or 9). */
case 0x161:
profile = SPA_AUDIO_WMA_PROFILE_WMA9;
info->info.wma.profile = SPA_AUDIO_WMA_PROFILE_WMA9;
break;
/* This originates from Microsoft's mmreg.h , where
* 0x162 is specified as meaning WMA v3 (which is commonly
* referred to as WMA 9 Pro). */
case 0x162:
profile = SPA_AUDIO_WMA_PROFILE_WMA9_PRO;
info->info.wma.profile = SPA_AUDIO_WMA_PROFILE_WMA9_PRO;
break;
/* This originates from Microsoft's mmreg.h , where
* 0x163 is specified as meaning WMA 9 lossless. */
case 0x163:
profile = SPA_AUDIO_WMA_PROFILE_WMA9_LOSSLESS;
info->info.wma.profile = SPA_AUDIO_WMA_PROFILE_WMA9_LOSSLESS;
break;
/* WMA 10 is not mentioned in mmreg.h - these were empirically
* determined instead. */
case 0x166:
profile = SPA_AUDIO_WMA_PROFILE_WMA10;
info->info.wma.profile = SPA_AUDIO_WMA_PROFILE_WMA10;
break;
case 0x167:
profile = SPA_AUDIO_WMA_PROFILE_WMA10_LOSSLESS;
info->info.wma.profile = SPA_AUDIO_WMA_PROFILE_WMA10_LOSSLESS;
break;
default:
fprintf(stderr, "error: invalid WMA profile\n");
return -EINVAL;
}
info->info.wma.rate = data->rate;
info->info.wma.channels = data->channels;
info->info.wma.bitrate = data->bitrate;
info->info.wma.block_align = codec_params->block_align;
info->info.wma.profile = profile;
break;
case AV_CODEC_ID_FLAC:
info->media_subtype = SPA_MEDIA_SUBTYPE_flac;