am a9024def: audio: implement mute on hdmi multichannel (991c0925) · Commits · e / os / android_hardware_qcom_audio

hal/audio_hw.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -1380,6 +1380,12 @@ static uint32_t out_get_latency(const struct audio_stream_out *stream)
		static int out_set_volume(struct audio_stream_out *stream, float left,
		float right)
		{
		struct stream_out out = (struct stream_out )stream;
		if (out->usecase == USECASE_AUDIO_PLAYBACK_MULTI_CH) {
		/* only take left channel into account: the API is for stereo anyway */
		out->muted = (left == 0.0f);
		return 0;
		}
		return -ENOSYS;
		}

		@@ -1402,6 +1408,8 @@ static ssize_t out_write(struct audio_stream_out stream, const void buffer,
		}

		if (out->pcm) {
		if (out->muted)
		memset((void *)buffer, 0, bytes);
		//ALOGV("%s: writing buffer (%d bytes) to pcm device", __func__, bytes);
		ret = pcm_write(out->pcm, (void *)buffer, bytes);
		}
		@@ -1712,6 +1720,7 @@ static int adev_open_output_stream(struct audio_hw_device *dev,

		out->dev = adev;
		out->standby = 1;
		/* out->muted = false; by calloc() */

		config->format = out->stream.common.get_format(&out->stream.common);
		config->channel_mask = out->stream.common.get_channels(&out->stream.common);

+1 −0

Original line number	Diff line number	Diff line
		@@ -158,6 +158,7 @@ struct stream_out {
		audio_usecase_t usecase;
		/* Array of supported channel mask configurations. +1 so that the last entry is always 0 */
		audio_channel_mask_t supported_channel_masks[MAX_SUPPORTED_CHANNEL_MASKS + 1];
		bool muted;

		struct audio_device *dev;
		};