Re: [Sound-open-firmware] [PATCH v1 3/3] Passthrough component added

On Mon, 2017-09-04 at 14:35 +0100, Ranjani Sridharan wrote:

This patch adds a passthrough component that copies the input sample from the source buffer to the sink buffer. It is meant to serve as a template for creating new components.

Signed-off-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com

src/audio/Makefile.am | 3 +- src/audio/passthrough.c | 216 +++++++++++++++++++++++++++++++++++++++++++++++ src/include/reef/trace.h | 1 + src/include/uapi/ipc.h | 7 ++ 4 files changed, 226 insertions(+), 1 deletion(-) create mode 100644 src/audio/passthrough.c

diff --git a/src/audio/Makefile.am b/src/audio/Makefile.am index 285422e..c71430c 100644 --- a/src/audio/Makefile.am +++ b/src/audio/Makefile.am @@ -17,7 +17,8 @@ libaudio_a_SOURCES = \ pipeline.c \ pipeline_static.c \ component.c \

• buffer.c

• buffer.c \
• passthrough.c

libaudio_a_CFLAGS = \ $(ARCH_CFLAGS) \ diff --git a/src/audio/passthrough.c b/src/audio/passthrough.c new file mode 100644 index 0000000..1056a03 --- /dev/null +++ b/src/audio/passthrough.c @@ -0,0 +1,216 @@ +/*

• • Copyright (c) 2016, Intel Corporation
• • All rights reserved.
• • Redistribution and use in source and binary forms, with or without
• • modification, are permitted provided that the following conditions are met:
• • • Redistributions of source code must retain the above copyright

• • notice, this list of conditions and the following disclaimer.
    

• • • Redistributions in binary form must reproduce the above copyright

• • notice, this list of conditions and the following disclaimer in the
    

• • documentation and/or other materials provided with the distribution.
    

• • • Neither the name of the Intel Corporation nor the

• • names of its contributors may be used to endorse or promote products
    

• • derived from this software without specific prior written permission.
    

• • THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
• • AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
• • IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
• • ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
• • LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
• • CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
• • SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
• • INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
• • CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
• • ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
• • POSSIBILITY OF SUCH DAMAGE.
• • Author: Ranjani Sridharan ranjani.sridharan@linux.intel.com
• */

+#include <stdio.h> +#include <stdint.h> +#include <stddef.h> +#include <reef/lock.h> +#include <reef/alloc.h> +#include <reef/list.h> +#include <reef/stream.h> +#include <reef/trace.h> +#include <reef/audio/component.h> +#include <reef/audio/pipeline.h> +#include <uapi/ipc.h>

+/* tracing */ +#define trace_pass(__e) trace_event(TRACE_CLASS_PASS, __e) +#define trace_pass_error(__e) trace_error(TRACE_CLASS_PASS, __e) +#define tracev_pass(__e) tracev_event(TRACE_CLASS_PASS, __e)

Probably best to write a short description of that this comp does and how it's intended as satrting point and template for other components.

+/*

• • passthrough_comp_data structure
• • passthrough_func - function that performs the routing of input buffer

• • 	 to the output buffer based on config
    

• */

+struct passthrough_comp_data {

• int (*passthrough_func)(struct comp_dev *dev, struct comp_buffer *sink,

• struct comp_buffer *source, uint32_t frames);
  

+};

+/* passthrough function to copy data from source to sink buffer */ +static int passthrough_function(struct comp_dev *dev,

• struct comp_buffer *sink_buffer,
• struct comp_buffer *source_buffer, uint32_t frames)

+{

• struct sof_ipc_comp_config *config = COMP_GET_CONFIG(dev);
• int32_t *src = (int32_t *) source_buffer->r_ptr;
• int32_t *dest = (int32_t *) sink_buffer->w_ptr;
• int nch = dev->params.channels;
• int ret = 0;
• /* copy frames from source to destination */
• switch (config->frame_fmt) {
• case SOF_IPC_FRAME_S16_LE:

• memcpy(dest, src, frames * nch * sizeof(int16_t));
  

• break;
  

• case SOF_IPC_FRAME_S32_LE:
• case SOF_IPC_FRAME_S24_4LE:
• case SOF_IPC_FRAME_FLOAT:

• memcpy(dest, src, frames * nch * sizeof(int32_t));
  

• break;
  

• default:

• trace_pass_error("PTp");
  

same issues as with mux here.

• ret = -EINVAL;
  

• break;
  

• }
• return ret;

+}

+static struct comp_dev *passthrough_new(struct sof_ipc_comp *comp) +{

• struct comp_dev *dev;
• struct passthrough_comp_data *cd;
• trace_pass("PTn");
• dev = rzalloc(RZONE_RUNTIME, RFLAGS_NONE,

• COMP_SIZE(struct sof_ipc_comp_passthrough));
  

• if (dev == NULL)

• return NULL;
  

• memcpy(&dev->comp, comp, sizeof(struct sof_ipc_comp_passthrough));
• cd = rzalloc(RZONE_RUNTIME, RFLAGS_NONE, sizeof(*cd));
• if (cd == NULL) {

• rfree(dev);
  

• return NULL;
  

• }
• comp_set_drvdata(dev, cd);
• cd->passthrough_func = passthrough_function;

Can you be verbose with comments throughout this file since it will be a template too.

• return dev;

+}

+static void passthrough_free(struct comp_dev *dev) +{

• struct passthrough_comp_data *cd = comp_get_drvdata(dev);
• rfree(cd);
• rfree(dev);

+}

+/* set component audio stream parameters */ +static int passthrough_params(struct comp_dev *dev) +{

• return 0;

+}

+/* used to pass standard and bespoke commands (with data) to component */ +static int passthrough_cmd(struct comp_dev *dev, int cmd, void *data) +{

• int ret = 0;
• switch (cmd) {
• case COMP_CMD_START:
• case COMP_CMD_STOP:
• case COMP_CMD_PAUSE:
• case COMP_CMD_RELEASE:
• default:

• ret = comp_set_state(dev, cmd);
  

• break;
  

• }

• return ret;

+}

+/* copy and process stream data from source to sink buffers */ +static int passthrough_copy(struct comp_dev *dev) +{

• struct passthrough_comp_data *cd = comp_get_drvdata(dev);
• struct comp_buffer *source_buffer = NULL, *sink_buffer = NULL;
• uint32_t copy_bytes;
• /* get source and sink buffers */
• source_buffer = list_first_item(&dev->bsource_list, struct comp_buffer,

• sink_list);
  

• sink_buffer = list_first_item(&dev->bsink_list, struct comp_buffer,

• source_list);
  

• /* check that source has enough frames available and sink enough

• * frames free
  

• */
  

• copy_bytes = comp_buffer_get_copy_bytes(dev, source_buffer,

• 	sink_buffer);
  

• if (copy_bytes < dev->frames * dev->frame_bytes) {

• trace_pass_error("PTc");
  

• return -EINVAL;
  

• }
• /* Run passthrough if buffers have enough room */
• cd->passthrough_func(dev, sink_buffer, source_buffer, dev->frames);
• comp_update_buffer_consume(source_buffer,

• dev->params.host_period_bytes);
  

• comp_update_buffer_produce(sink_buffer, dev->params.host_period_bytes);
• return 0;

+}

+static int passthrough_preload(struct comp_dev *dev) +{

• return passthrough_copy(dev);

+}

+static int passthrough_reset(struct comp_dev *dev) +{

• trace_pass("PTe");
• dev->state = COMP_STATE_INIT;
• return 0;

+}

+static int passthrough_prepare(struct comp_dev *dev) +{

• trace_pass("PTl");
• dev->state = COMP_STATE_PREPARE;
• return 0;

+}

+struct comp_driver comp_passthrough = {

• .type = SOF_COMP_PASSTHROUGH,
• .ops = {

• .new		= passthrough_new,
  

• .free		= passthrough_free,
  

• .params		= passthrough_params,
  

• .cmd		= passthrough_cmd,
  

• .copy		= passthrough_copy,
  

• .prepare	= passthrough_prepare,
  

• .reset		= passthrough_reset,
  

• .preload	= passthrough_preload,
  

• },

+};

+void sys_comp_passthrough_init(void) +{

• comp_register(&comp_passthrough);

+} diff --git a/src/include/reef/trace.h b/src/include/reef/trace.h index 300e8d8..b7ec31a 100644 --- a/src/include/reef/trace.h +++ b/src/include/reef/trace.h @@ -87,6 +87,7 @@ #define TRACE_CLASS_TONE (18 << 24) #define TRACE_CLASS_EQ_FIR (19 << 24) #define TRACE_CLASS_EQ_IIR (20 << 24) +#define TRACE_CLASS_PASS (21 << 24)

/* move to config.h */ #define TRACE 1 diff --git a/src/include/uapi/ipc.h b/src/include/uapi/ipc.h index e0d0303..cb79e26 100644 --- a/src/include/uapi/ipc.h +++ b/src/include/uapi/ipc.h @@ -474,6 +474,7 @@ enum sof_comp_type { SOF_COMP_EQ_FIR, SOF_COMP_FILEREAD, /* host test based file IO */ SOF_COMP_FILEWRITE, /* host test based file IO */

• SOF_COMP_PASSTHROUGH,

};

/* XRUN action for component */ @@ -573,6 +574,12 @@ struct sof_ipc_comp_mux { struct sof_ipc_comp_config config; } __attribute__((packed));

+/* generic passthrough component */ +struct sof_ipc_comp_passthrough {

• struct sof_ipc_comp comp;
• struct sof_ipc_comp_config config;

+} __attribute__((packed));

/* generic tone generator component */ struct sof_ipc_comp_tone { struct sof_ipc_comp comp;

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