[FFmpeg-devel] [PATCH 1/2] Use WAVEFORMATEX from AM_MEDIA_TYPE for describing device capabilities. (Fixes #9420)

[Brad Isbell]

>From fd6bfd237d4d25de04d8179ccb1ff2d2f0aa904f Mon Sep 17 00:00:00 2001
From: Brad Isbell <brad at audiopump.co>
Date: Sun, 3 Oct 2021 00:16:05 -0500
Subject: [PATCH 1/2] Use WAVEFORMATEX from AM_MEDIA_TYPE for describing
device
 capabilities.  (Fixes #9420)

Signed-off-by: Brad Isbell <brad at audiopump.co>
---
 libavdevice/dshow.c | 32 ++++++++++++--------------------
 1 file changed, 12 insertions(+), 20 deletions(-)

diff --git a/libavdevice/dshow.c b/libavdevice/dshow.c
index 8d0a6fc..5c1e494 100644
--- a/libavdevice/dshow.c
+++ b/libavdevice/dshow.c
@@ -422,28 +422,20 @@ dshow_cycle_formats(AVFormatContext *avctx, enum
dshowDeviceType devtype,
                 goto next;
             }
             if (!pformat_set) {
-                av_log(avctx, AV_LOG_INFO, "  min ch=%lu bits=%lu
rate=%6lu max ch=%lu bits=%lu rate=%6lu\n",
-                       acaps->MinimumChannels,
acaps->MinimumBitsPerSample, acaps->MinimumSampleFrequency,
-                       acaps->MaximumChannels,
acaps->MaximumBitsPerSample, acaps->MaximumSampleFrequency);
+                av_log(
+                    avctx,
+                    AV_LOG_INFO,
+                    "  ch=%2lu, bits=%2lu, rate=%6lu\n",
+                    fx->nChannels, fx->wBitsPerSample, fx->nSamplesPerSec
+                );
                 continue;
             }
-            if (ctx->sample_rate) {
-                if (ctx->sample_rate > acaps->MaximumSampleFrequency ||
-                    ctx->sample_rate < acaps->MinimumSampleFrequency)
-                    goto next;
-                fx->nSamplesPerSec = ctx->sample_rate;
-            }
-            if (ctx->sample_size) {
-                if (ctx->sample_size > acaps->MaximumBitsPerSample ||
-                    ctx->sample_size < acaps->MinimumBitsPerSample)
-                    goto next;
-                fx->wBitsPerSample = ctx->sample_size;
-            }
-            if (ctx->channels) {
-                if (ctx->channels > acaps->MaximumChannels ||
-                    ctx->channels < acaps->MinimumChannels)
-                    goto next;
-                fx->nChannels = ctx->channels;
+            if (
+                (ctx->sample_rate && ctx->sample_rate !=
fx->nSamplesPerSec) ||
+                (ctx->sample_size && ctx->sample_size !=
fx->wBitsPerSample) ||
+                (ctx->channels    && ctx->channels    != fx->nChannels
)
+            ) {
+                goto next;
             }
         }
         if (IAMStreamConfig_SetFormat(config, type) != S_OK)
-- 
2.32.0.windows.1