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fix(deltacast-bridge): configure both stereo channels + INTERFACE for audio extraction (SDK Sample_RXAudio)

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Zac 2026-06-02 02:01:33 +00:00
parent 6908801822
commit 8a675992c2
1 changed files with 12 additions and 0 deletions
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12
services/capture/deltacast-bridge/main.c
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@ -179,13 +179,25 @@ static void *audio_thread(void *arg) {
VHD_SDI_STPROC_DISJOINED_ANC,
NULL, &stream, NULL);
if (r == VHDERR_NOERROR) {
/* Per Deltacast SDK Sample_RXAudio.cpp: VHD_SDI_SP_INTERFACE must be
* propagated to the audio stream, otherwise VHD_SlotExtractAudio
* returns 0 samples (silent capture). */
ULONG iface = 0;
VHD_GetStreamProperty(stream, VHD_SDI_SP_INTERFACE, &iface);
VHD_SetStreamProperty(stream, VHD_SDI_SP_VIDEO_STANDARD, ps->video_std);
VHD_SetStreamProperty(stream, VHD_SDI_SP_CLOCK_SYSTEM, ps->clock_div);
VHD_SetStreamProperty(stream, VHD_CORE_SP_TRANSFER_SCHEME, VHD_TRANSFER_SLAVED);
VHD_SetStreamProperty(stream, VHD_SDI_SP_INTERFACE, iface);
/* Configure BOTH channels of the stereo pair (group 0). The actual PCM
* samples land in pAudioChannels[0].pData (packed L/R s16le). Channel
* [1] must declare Mode+BufferFormat so the SDK recognizes the pair. */
ai.pAudioGroups[0].pAudioChannels[0].Mode = VHD_AM_STEREO;
ai.pAudioGroups[0].pAudioChannels[0].BufferFormat = VHD_AF_16;
ai.pAudioGroups[0].pAudioChannels[0].pData = buf;
ai.pAudioGroups[0].pAudioChannels[1].Mode = VHD_AM_STEREO;
ai.pAudioGroups[0].pAudioChannels[1].BufferFormat = VHD_AF_16;
if (VHD_StartStream(stream) == VHDERR_NOERROR) {
have_vhd_audio = 1;