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mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00

avformat/riffenc: don't force WAVEFORMATEXTENSIBLE for flt/dbl LPCM

2c2a167ca7 forced WAVEFORMATEXTENSIBLE for all LPCM streams with greater
than 16 bits per sample. However, WAVEFORMATEX allows IEEE Float samples
or any depth where raw depth == coded depth, see Remarks section at
https://learn.microsoft.com/en-us/windows/win32/api/mmreg/ns-mmreg-waveformatex
and samples M1F1-float32-AFsp, M1F1-float64-AFsp at
https://www.mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/Samples.html

There are hardware devices and likely software players requiring float samples
that fail to qualify files with WAVEFORMATEXTENSIBLE headers.
This commit is contained in:
Gyan Doshi 2023-12-21 10:45:58 +05:30
parent 56ca0f2918
commit c1340f3439
5 changed files with 59 additions and 59 deletions

View File

@ -81,7 +81,7 @@ int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb,
av_channel_layout_compare(&par->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) ||
par->sample_rate > 48000 ||
par->codec_id == AV_CODEC_ID_EAC3 || par->codec_id == AV_CODEC_ID_DFPWM ||
av_get_bits_per_sample(par->codec_id) > 16;
(av_get_bits_per_sample(par->codec_id) > 16 && par->codec_tag != 0x0003);
if (waveformatextensible)
avio_wl16(pb, 0xfffe);

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@ -1,4 +1,4 @@
653d82a64b7bd96ac193e105e9f92d4c *tests/data/fate/acodec-pcm-f32le.wav
2116880 tests/data/fate/acodec-pcm-f32le.wav
03ae40a19deacaca6e0c4ec08dd35956 *tests/data/fate/acodec-pcm-f32le.wav
2116858 tests/data/fate/acodec-pcm-f32le.wav
95e54b261530a1bcf6de6fe3b21dc5f6 *tests/data/fate/acodec-pcm-f32le.out.wav
stddev: 0.00 PSNR:999.99 MAXDIFF: 0 bytes: 1058400/ 1058400

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@ -1,4 +1,4 @@
48b4cd378f47a50dc902aa03cc8280ed *tests/data/fate/acodec-pcm-f64le.wav
4233680 tests/data/fate/acodec-pcm-f64le.wav
69ffdb079600c53a00c5b0119b586a98 *tests/data/fate/acodec-pcm-f64le.wav
4233658 tests/data/fate/acodec-pcm-f64le.wav
95e54b261530a1bcf6de6fe3b21dc5f6 *tests/data/fate/acodec-pcm-f64le.out.wav
stddev: 0.00 PSNR:999.99 MAXDIFF: 0 bytes: 1058400/ 1058400

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@ -1,53 +1,53 @@
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