Move codec query from encoder to separate file

1 files changed, 235 insertions, 0 deletions

diff --git a/src/codec_query/cuda.c b/src/codec_query/cuda.c
new file mode 100644
index 0000000..690e7d4
--- /dev/null
+++ b/src/codec_query/cuda.c
@@ -0,0 +1,235 @@
+#include "../../include/codec_query/cuda.h"
+#include "../../include/cuda.h"
+#include "../../external/nvEncodeAPI.h"
+
+#include <dlfcn.h>
+#include <stdio.h>
+#include <string.h>
+
+static void* open_nvenc_library(void) {
+    dlerror(); /* clear */
+    void *lib = dlopen("libnvidia-encode.so.1", RTLD_LAZY);
+    if(!lib) {
+        lib = dlopen("libnvidia-encode.so", RTLD_LAZY);
+        if(!lib) {
+            fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc failed: failed to load libnvidia-encode.so/libnvidia-encode.so.1, error: %s\n", dlerror());
+            return NULL;
+        }
+    }
+    return lib;
+}
+
+static bool profile_is_h264(const GUID *profile_guid) {
+    const GUID *h264_guids[] = {
+        &NV_ENC_H264_PROFILE_BASELINE_GUID,
+        &NV_ENC_H264_PROFILE_MAIN_GUID,
+        &NV_ENC_H264_PROFILE_HIGH_GUID,
+        &NV_ENC_H264_PROFILE_PROGRESSIVE_HIGH_GUID,
+        &NV_ENC_H264_PROFILE_CONSTRAINED_HIGH_GUID
+    };
+
+    for(int i = 0; i < 5; ++i) {
+        if(memcmp(profile_guid, h264_guids[i], sizeof(GUID)) == 0)
+            return true;
+    }
+
+    return false;
+}
+
+static bool profile_is_hevc(const GUID *profile_guid) {
+    const GUID *h264_guids[] = {
+        &NV_ENC_HEVC_PROFILE_MAIN_GUID,
+    };
+
+    for(int i = 0; i < 1; ++i) {
+        if(memcmp(profile_guid, h264_guids[i], sizeof(GUID)) == 0)
+            return true;
+    }
+
+    return false;
+}
+
+static bool profile_is_hevc_10bit(const GUID *profile_guid) {
+    const GUID *h264_guids[] = {
+        &NV_ENC_HEVC_PROFILE_MAIN10_GUID,
+    };
+
+    for(int i = 0; i < 1; ++i) {
+        if(memcmp(profile_guid, h264_guids[i], sizeof(GUID)) == 0)
+            return true;
+    }
+
+    return false;
+}
+
+static bool profile_is_av1(const GUID *profile_guid) {
+    const GUID *h264_guids[] = {
+        &NV_ENC_AV1_PROFILE_MAIN_GUID,
+    };
+
+    for(int i = 0; i < 1; ++i) {
+        if(memcmp(profile_guid, h264_guids[i], sizeof(GUID)) == 0)
+            return true;
+    }
+
+    return false;
+}
+
+static bool encoder_get_supported_profiles(const NV_ENCODE_API_FUNCTION_LIST *function_list, void *nvenc_encoder, const GUID *encoder_guid, gsr_supported_video_codecs *supported_video_codecs) {
+    bool success = false;
+    GUID *profile_guids = NULL;
+
+    uint32_t profile_guid_count = 0;
+    if(function_list->nvEncGetEncodeProfileGUIDCount(nvenc_encoder, *encoder_guid, &profile_guid_count) != NV_ENC_SUCCESS) {
+        fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc: nvEncGetEncodeProfileGUIDCount failed, error: %s\n", function_list->nvEncGetLastErrorString(nvenc_encoder));
+        goto fail;
+    }
+
+    if(profile_guid_count == 0)
+        goto fail;
+
+    profile_guids = calloc(profile_guid_count, sizeof(GUID));
+    if(!profile_guids) {
+        fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc: failed to allocate %d guids\n", (int)profile_guid_count);
+        goto fail;
+    }
+
+    if(function_list->nvEncGetEncodeProfileGUIDs(nvenc_encoder, *encoder_guid, profile_guids, profile_guid_count, &profile_guid_count) != NV_ENC_SUCCESS) {
+        fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc: nvEncGetEncodeProfileGUIDs failed, error: %s\n", function_list->nvEncGetLastErrorString(nvenc_encoder));
+        goto fail;
+    }
+
+    for(uint32_t i = 0; i < profile_guid_count; ++i) {
+        if(profile_is_h264(&profile_guids[i])) {
+            supported_video_codecs->h264 = true;
+        } else if(profile_is_hevc(&profile_guids[i])) {
+            supported_video_codecs->hevc = true;
+        } else if(profile_is_hevc_10bit(&profile_guids[i])) {
+            supported_video_codecs->hevc_hdr = true;
+            supported_video_codecs->hevc_10bit = true;
+        } else if(profile_is_av1(&profile_guids[i])) {
+            supported_video_codecs->av1 = true;
+            supported_video_codecs->av1_hdr = true;
+            supported_video_codecs->av1_10bit = true;
+        }
+    }
+
+    success = true;
+    fail:
+
+    if(profile_guids)
+        free(profile_guids);
+
+    return success;
+}
+
+static bool get_supported_video_codecs(const NV_ENCODE_API_FUNCTION_LIST *function_list, void *nvenc_encoder, gsr_supported_video_codecs *supported_video_codecs) {
+    bool success = false;
+    GUID *encoder_guids = NULL;
+    *supported_video_codecs = (gsr_supported_video_codecs){0};
+
+    uint32_t encode_guid_count = 0;
+    if(function_list->nvEncGetEncodeGUIDCount(nvenc_encoder, &encode_guid_count) != NV_ENC_SUCCESS) {
+        fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc: nvEncGetEncodeGUIDCount failed, error: %s\n", function_list->nvEncGetLastErrorString(nvenc_encoder));
+        goto fail;
+    }
+
+    if(encode_guid_count == 0)
+        goto fail;
+
+    encoder_guids = calloc(encode_guid_count, sizeof(GUID));
+    if(!encoder_guids) {
+        fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc: failed to allocate %d guids\n", (int)encode_guid_count);
+        goto fail;
+    }
+
+    if(function_list->nvEncGetEncodeGUIDs(nvenc_encoder, encoder_guids, encode_guid_count, &encode_guid_count) != NV_ENC_SUCCESS) {
+        fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc: nvEncGetEncodeGUIDs failed, error: %s\n", function_list->nvEncGetLastErrorString(nvenc_encoder));
+        goto fail;
+    }
+
+    for(uint32_t i = 0; i < encode_guid_count; ++i) {
+        encoder_get_supported_profiles(function_list, nvenc_encoder, &encoder_guids[i], supported_video_codecs);
+    }
+
+    success = true;
+    fail:
+
+    if(encoder_guids)
+        free(encoder_guids);
+
+    return success;
+}
+
+#define NVENCAPI_VERSION_470 (11 | (1 << 24))
+#define NVENCAPI_STRUCT_VERSION_470(ver) ((uint32_t)NVENCAPI_VERSION_470 | ((ver)<<16) | (0x7 << 28))
+
+bool gsr_get_supported_video_codecs_nvenc(gsr_supported_video_codecs *video_codecs, bool cleanup) {
+    memset(video_codecs, 0, sizeof(*video_codecs));
+
+    bool success = false;
+    void *nvenc_lib = NULL;
+    void *nvenc_encoder = NULL;
+    gsr_cuda cuda;
+    memset(&cuda, 0, sizeof(cuda));
+
+    if(!gsr_cuda_load(&cuda, NULL, false)) {
+        fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc: failed to load cuda\n");
+        goto done;
+    }
+
+    nvenc_lib = open_nvenc_library();
+    if(!nvenc_lib)
+        goto done;
+
+    typedef NVENCSTATUS NVENCAPI (*FUNC_NvEncodeAPICreateInstance)(NV_ENCODE_API_FUNCTION_LIST *functionList);
+    FUNC_NvEncodeAPICreateInstance nvEncodeAPICreateInstance = (FUNC_NvEncodeAPICreateInstance)dlsym(nvenc_lib, "NvEncodeAPICreateInstance");
+    if(!nvEncodeAPICreateInstance) {
+        fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc: failed to find NvEncodeAPICreateInstance in libnvidia-encode.so\n");
+        goto done;
+    }
+
+    NV_ENCODE_API_FUNCTION_LIST function_list;
+    memset(&function_list, 0, sizeof(function_list));
+    function_list.version = NVENCAPI_STRUCT_VERSION(2);
+    if(nvEncodeAPICreateInstance(&function_list) != NV_ENC_SUCCESS) {
+        fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc: nvEncodeAPICreateInstance failed\n");
+        goto done;
+    }
+
+    NV_ENC_OPEN_ENCODE_SESSION_EX_PARAMS params;
+    memset(&params, 0, sizeof(params));
+    params.version = NVENCAPI_STRUCT_VERSION(1);
+    params.deviceType = NV_ENC_DEVICE_TYPE_CUDA;
+    params.device = cuda.cu_ctx;
+    params.apiVersion = NVENCAPI_VERSION;
+    if(function_list.nvEncOpenEncodeSessionEx(&params, &nvenc_encoder) != NV_ENC_SUCCESS) {
+        // Old nvidia gpus dont support the new nvenc api (which is required for av1).
+        // In such cases fallback to old api version if possible and try again.
+        function_list.version = NVENCAPI_STRUCT_VERSION_470(2);
+        if(nvEncodeAPICreateInstance(&function_list) != NV_ENC_SUCCESS) {
+            fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc: nvEncodeAPICreateInstance (retry) failed\n");
+            goto done;
+        }
+
+        params.version = NVENCAPI_STRUCT_VERSION_470(1);
+        params.apiVersion = NVENCAPI_VERSION_470;
+        if(function_list.nvEncOpenEncodeSessionEx(&params, &nvenc_encoder) != NV_ENC_SUCCESS) {
+            fprintf(stderr, "gsr error: gsr_get_supported_video_codecs_nvenc: nvEncOpenEncodeSessionEx (retry) failed\n");
+            goto done;
+        }
+    }
+
+    success = get_supported_video_codecs(&function_list, nvenc_encoder, video_codecs);
+
+    done:
+    if(cleanup) {
+        if(nvenc_encoder)
+            function_list.nvEncDestroyEncoder(nvenc_encoder);
+        if(nvenc_lib)
+            dlclose(nvenc_lib);
+        gsr_cuda_unload(&cuda);
+    }
+
+    return success;
+}