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libs/hwcodec/cpp/common/platform/linux/linux.cpp

@@ -107,10 +107,19 @@ int linux_support_rkmpp() {
 // Returns 0 if a M2M capable device is found, -1 otherwise
 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++) {

libs/hwcodec/cpp/common/util.cpp

@@ -10,11 +10,19 @@ extern "C" {
 
 #include "common.h"
 
-#include "common.h"
-
 #define LOG_MODULE "UTIL"
 #include "log.h"
 
+#ifndef FF_PROFILE_H264_BASELINE
+#define FF_PROFILE_H264_BASELINE 66
+#endif
+#ifndef FF_PROFILE_H264_HIGH
+#define FF_PROFILE_H264_HIGH 100
+#endif
+#ifndef FF_PROFILE_HEVC_MAIN
+#define FF_PROFILE_HEVC_MAIN 1
+#endif
+
 namespace {
 
 // Helper function: check if encoder is software H264 (libx264)
@@ -147,11 +155,11 @@ 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
     }

libs/hwcodec/cpp/ffmpeg_ram/ffmpeg_ram_decode.cpp

@@ -55,7 +55,11 @@ public:
     callback_ = callback;
 
     if (name_.find("rkmpp") != std::string::npos) {
+#ifdef AV_HWDEVICE_TYPE_RKMPP
       hw_device_type_ = AV_HWDEVICE_TYPE_RKMPP;
+#else
+      set_last_error("RKMPP support not compiled in FFmpeg");
+#endif
     }
   }