diff options
Diffstat (limited to 'hw/display/xlnx_dp.c')
| -rw-r--r-- | hw/display/xlnx_dp.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/hw/display/xlnx_dp.c b/hw/display/xlnx_dp.c index 822355ecc6..43c7dd8e9c 100644 --- a/hw/display/xlnx_dp.c +++ b/hw/display/xlnx_dp.c @@ -380,13 +380,16 @@ static inline void xlnx_dp_audio_mix_buffer(XlnxDPState *s) static void xlnx_dp_audio_callback(void *opaque, int avail) { /* - * Get some data from the DPDMA and compute these data. - * Then wait for QEMU's audio subsystem to call this callback. + * Get the individual left and right audio streams from the DPDMA, + * and fill the output buffer with the combined stereo audio data + * adjusted by the volume controls. + * QEMU's audio subsystem will call this callback repeatedly; + * we return the data from the output buffer until it is emptied, + * and then we will read data from the DPDMA again. */ XlnxDPState *s = XLNX_DP(opaque); size_t written = 0; - /* If there are already some data don't get more data. */ if (s->byte_left == 0) { s->audio_data_available[0] = xlnx_dpdma_start_operation(s->dpdma, 4, true); |