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stm32: addition of the STM32 JPEG Codec (NV12 -> JPEG encoding) #96678

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stm32: addition of the STM32 JPEG Codec (NV12 -> JPEG encoding) #96678

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367aab1
samples: video: tcpserversink: set input prior to output in M2M
Oct 14, 2025
657e2b4
dts-bindings: video: addition of ST JPEG codec description
Jun 28, 2025
2dcc2fc
video: stm32: addition of the STM32 JPEG Codec support
Jun 28, 2025
c4b75ee
dts: stm32n6: add jpeg codec node in stm32n6.dtsi
Jun 28, 2025
b8801f7
boards: stm32n6570_dk: enable the JPEG codec
Oct 13, 2025
d04dd19
samples: video: tcpserversink: add stm32n6570_dk jpeg conf
Oct 13, 2025
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28 changes: 28 additions & 0 deletions dts/bindings/video/st,stm32-jpeg.yaml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,28 @@
#
# Copyright (c) 2025 STMicroelectronics.
#
# SPDX-License-Identifier: Apache-2.0
#

description: |
STM32 JPEG Codec.
The STM32 JPEG codec can decode JPEG compressed frames
and encode uncompressed frames to the JPEG format.
Comment on lines +10 to +11
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As I'm not familiar with video conventions: Is it worth specifying that this is an HW accelerator ie that we're not talking about a SW Codec ?

compatible: "st,stm32-jpeg"

include: [base.yaml, reset-device.yaml]

properties:
reg:
required: true

clocks:
required: true

interrupts:
required: true

resets:
required: true
45 changes: 21 additions & 24 deletions samples/drivers/video/tcpserversink/src/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -51,13 +51,13 @@ int configure_encoder(void)
}

/* Get capabilities */
caps.type = VIDEO_BUF_TYPE_OUTPUT;
caps.type = VIDEO_BUF_TYPE_INPUT;
if (video_get_caps(encoder_dev, &caps)) {
LOG_ERR("Unable to retrieve video capabilities");
return -1;
}

LOG_INF("- Encoder output capabilities:");
LOG_INF("- Encoder input capabilities:");
i = 0;
while (caps.format_caps[i].pixelformat) {
const struct video_format_cap *fcap = &caps.format_caps[i];
Expand All @@ -68,13 +68,13 @@ int configure_encoder(void)
i++;
}

caps.type = VIDEO_BUF_TYPE_INPUT;
caps.type = VIDEO_BUF_TYPE_OUTPUT;
if (video_get_caps(encoder_dev, &caps)) {
LOG_ERR("Unable to retrieve video capabilities");
return -1;
}

LOG_INF("- Encoder input capabilities:");
LOG_INF("- Encoder output capabilities:");
i = 0;
while (caps.format_caps[i].pixelformat) {
const struct video_format_cap *fcap = &caps.format_caps[i];
Expand All @@ -86,14 +86,16 @@ int configure_encoder(void)
}

/* Get default/native format */
fmt.type = VIDEO_BUF_TYPE_OUTPUT;
fmt.type = VIDEO_BUF_TYPE_INPUT;
if (video_get_format(encoder_dev, &fmt)) {
LOG_ERR("Unable to retrieve video format");
return -1;
}

LOG_INF("Video encoder device detected, format: %s %ux%u",
VIDEO_FOURCC_TO_STR(fmt.pixelformat), fmt.width, fmt.height);
/* Set input format */
if (strcmp(CONFIG_VIDEO_PIXEL_FORMAT, "")) {
fmt.pixelformat = VIDEO_FOURCC_FROM_STR(CONFIG_VIDEO_PIXEL_FORMAT);
}

#if CONFIG_VIDEO_FRAME_HEIGHT
fmt.height = CONFIG_VIDEO_FRAME_HEIGHT;
Expand All @@ -103,20 +105,29 @@ int configure_encoder(void)
fmt.width = CONFIG_VIDEO_FRAME_WIDTH;
#endif

fmt.type = VIDEO_BUF_TYPE_INPUT;
if (video_set_format(encoder_dev, &fmt)) {
LOG_ERR("Unable to set input format");
return -1;
}

LOG_INF("- Video encoder input format: %s %ux%u", VIDEO_FOURCC_TO_STR(fmt.pixelformat),
fmt.width, fmt.height);

/* Set output format */
if (strcmp(CONFIG_VIDEO_ENCODED_PIXEL_FORMAT, "")) {
fmt.pixelformat = VIDEO_FOURCC_FROM_STR(CONFIG_VIDEO_ENCODED_PIXEL_FORMAT);
}

LOG_INF("- Video encoder output format: %s %ux%u", VIDEO_FOURCC_TO_STR(fmt.pixelformat),
fmt.width, fmt.height);

fmt.type = VIDEO_BUF_TYPE_OUTPUT;
if (video_set_format(encoder_dev, &fmt)) {
LOG_ERR("Unable to set format");
return -1;
}

LOG_INF("- Video encoder output format: %s %ux%u", VIDEO_FOURCC_TO_STR(fmt.pixelformat),
fmt.width, fmt.height);

/* Alloc output buffer */
size = fmt.size;
if (size == 0) {
Expand All @@ -133,20 +144,6 @@ int configure_encoder(void)
buffer->type = VIDEO_BUF_TYPE_OUTPUT;
video_enqueue(encoder_dev, buffer);

/* Set input format */
if (strcmp(CONFIG_VIDEO_PIXEL_FORMAT, "")) {
fmt.pixelformat = VIDEO_FOURCC_FROM_STR(CONFIG_VIDEO_PIXEL_FORMAT);
}

LOG_INF("- Video encoder input format: %s %ux%u", VIDEO_FOURCC_TO_STR(fmt.pixelformat),
fmt.width, fmt.height);

fmt.type = VIDEO_BUF_TYPE_INPUT;
if (video_set_format(encoder_dev, &fmt)) {
LOG_ERR("Unable to set input format");
return -1;
}

/* Start video encoder */
if (video_stream_start(encoder_dev, VIDEO_BUF_TYPE_INPUT)) {
LOG_ERR("Unable to start video encoder (input)");
Expand Down