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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