From dbbb71cf2b859901f3ed5b1e8b4dfec92651af35 Mon Sep 17 00:00:00 2001
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From: Jiajian Wu <jair.wu@rock-chips.com>
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Date: Tue, 11 Oct 2022 09:21:10 +0800
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Subject: [PATCH] riff: Fix bps caculation error for ADPCM
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The bps shall be caculated according to:
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ADPCM: rate * blockalign / ((blockalign - ch * 7) * 2)
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DVI ADPCM: rate * blockalign / ((blockalign - ch * 4) * 2)
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cus the sample size is 4bit in ADPCM witch is half
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of raw pcm.
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Signed-off-by: Jiajian Wu <jair.wu@rock-chips.com>
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---
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gst-libs/gst/riff/riff-media.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/gst-libs/gst/riff/riff-media.c b/gst-libs/gst/riff/riff-media.c
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index 21200a1..deb8e65 100644
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--- a/gst-libs/gst/riff/riff-media.c
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+++ b/gst-libs/gst/riff/riff-media.c
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@@ -1298,7 +1298,7 @@ gst_riff_create_audio_caps (guint16 codec_id,
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* would probably confuse timing */
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strf->av_bps = 0;
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if (strf->channels != 0 && strf->rate != 0 && strf->blockalign != 0) {
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- int spb = ((strf->blockalign - strf->channels * 7) / 2) * 2;
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+ int spb = (strf->blockalign - strf->channels * 7) * 2;
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strf->av_bps =
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gst_util_uint64_scale_int (strf->rate, strf->blockalign, spb);
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GST_DEBUG ("fixing av_bps to calculated value %d of MS ADPCM",
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@@ -1420,7 +1420,7 @@ gst_riff_create_audio_caps (guint16 codec_id,
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* as this would probably confuse timing */
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strf->av_bps = 0;
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if (strf->channels != 0 && strf->rate != 0 && strf->blockalign != 0) {
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- int spb = ((strf->blockalign - strf->channels * 4) / 2) * 2;
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+ int spb = (strf->blockalign - strf->channels * 4) * 2;
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strf->av_bps =
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gst_util_uint64_scale_int (strf->rate, strf->blockalign, spb);
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GST_DEBUG ("fixing av_bps to calculated value %d of IMA DVI ADPCM",
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--
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2.25.1
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