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feat: 支持树莓派 v4l2m2m 编码器探测

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mofeng
2026-02-09 14:54:46 +08:00
parent 8b17a0c48b
commit f8a031c90c
6 changed files with 85 additions and 12 deletions
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15
libs/hwcodec/cpp/common/platform/linux/linux.cpp
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@@ -162,10 +162,19 @@ int linux_support_v4l2m2m() {
};
// Check common V4L2 M2M device paths used by various ARM SoCs
// /dev/video10 - Standard on many SoCs
// /dev/video11 - Standard on many SoCs (often decoder)
// /dev/video0 - Some platforms (like RPi) might use this
// /dev/video1 - Alternate RPi path
// /dev/video2 - Alternate path
// /dev/video32 - Some Allwinner/Rockchip legacy
const char *m2m_devices[] = {
"/dev/video10", // Common M2M encoder device
"/dev/video11", // Common M2M decoder device
"/dev/video0", // Some SoCs use video0 for M2M
"/dev/video10",
"/dev/video11",
"/dev/video0",
"/dev/video1",
"/dev/video2",
"/dev/video32",
};
for (size_t i = 0; i < sizeof(m2m_devices) / sizeof(m2m_devices[0]); i++) {

6
libs/hwcodec/cpp/common/util.cpp
View File

@@ -147,11 +147,11 @@ bool set_lantency_free(void *priv_data, const std::string &name) {
// V4L2 M2M hardware encoder - minimize buffer latency
if (name.find("v4l2m2m") != std::string::npos) {
// Minimize number of output buffers for lower latency
if ((ret = av_opt_set_int(priv_data, "num_output_buffers", 2, 0)) < 0) {
if ((ret = av_opt_set_int(priv_data, "num_output_buffers", 4, 0)) < 0) {
LOG_WARN(std::string("v4l2m2m set num_output_buffers failed, ret = ") + av_err2str(ret));
// Not fatal
}
if ((ret = av_opt_set_int(priv_data, "num_capture_buffers", 2, 0)) < 0) {
if ((ret = av_opt_set_int(priv_data, "num_capture_buffers", 4, 0)) < 0) {
LOG_WARN(std::string("v4l2m2m set num_capture_buffers failed, ret = ") + av_err2str(ret));
// Not fatal
}
@@ -500,4 +500,4 @@ bool has_flag_could_not_find_ref_with_poc() {
extern "C" void hwcodec_set_flag_could_not_find_ref_with_poc() {
util_decode::g_flag_could_not_find_ref_with_poc = true;
}
}