hwaccel_libav_common.c

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/*
 * Copyright (c) 2018-2021 CESNET z.s.p.o.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. 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.
 * 
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 * 
 *      This product includes software developed by CESNET z.s.p.o.
 * 
 * 4. Neither the name of the CESNET 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 AUTHORS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESSED 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 AUTHORS 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.
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 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#include "config_unix.h"
#include "config_win32.h"
#endif
 
#include "debug.h"
#include "hwaccel_libav_common.h"
#include "libavcodec/lavc_common.h"
#include "types.h"
#include "utils/color_out.h"
#include "utils/macros.h"
 
static const struct {
        const char *name;
        enum hw_accel_type type;
        enum AVPixelFormat av_pixfmt;
        codec_t ug_pixfmt;
} accel_str_map[] = {
        {"vdpau",         HWACCEL_VDPAU,        AV_PIX_FMT_VDPAU,        HW_VDPAU},
        { "vdpau-copy",   HWACCEL_VDPAU,        AV_PIX_FMT_VDPAU,        HW_VDPAU},
        { "vaapi",        HWACCEL_VAAPI,        AV_PIX_FMT_VAAPI,        0       },
        { "videotoolbox", HWACCEL_VIDEOTOOLBOX, AV_PIX_FMT_VIDEOTOOLBOX, 0       },
        { "cuda",         HWACCEL_CUDA,         AV_PIX_FMT_CUDA,         0       },
#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(55, 75, 100)
        { "drm-prime",    HWACCEL_DRM_PRIME,    AV_PIX_FMT_DRM_PRIME,    DRM_PRIME },
#endif
#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(56, 39, 100)
        { "vulkan",       HWACCEL_VULKAN,       AV_PIX_FMT_VULKAN,       0       },
#endif
};
 
enum hw_accel_type hw_accel_from_str(const char *str){
        if (strcmp(str, "help") == 0) {
                char msg[STR_LEN] = "Available decode accelerations:";
                for (unsigned i = 0;
                     i < sizeof(accel_str_map) / sizeof(accel_str_map[0]);
                     i++) {
                        snprintf(msg + strlen(msg), sizeof msg - strlen(msg),
                                 " " TBOLD("%s"), accel_str_map[i].name);
                }
                color_printf("%s\n", msg);
                return HWACCEL_NONE;
        }
        for(unsigned i = 0; i < sizeof(accel_str_map) / sizeof(accel_str_map[0]); i++){
                if(strcmp(str, accel_str_map[i].name) == 0){
                        return accel_str_map[i].type;
                }
        }
 
        return HWACCEL_NONE;
}
 
enum hw_accel_type
hw_accel_from_pixfmt(enum AVPixelFormat pixfmt)
{
        for (unsigned i = 0; i < sizeof accel_str_map / sizeof accel_str_map[0];
             i++) {
                if (accel_str_map[i].av_pixfmt == pixfmt) {
                        return accel_str_map[i].type;
                }
        }
 
        return HWACCEL_NONE;
}
 
const char *hw_accel_to_str(enum hw_accel_type type){
        for(unsigned i = 0; i < sizeof(accel_str_map) / sizeof(accel_str_map[0]); i++){
                if(type == accel_str_map[i].type){
                        return accel_str_map[i].name;
                }
        }
 
        return "unknown";
}
 
codec_t
hw_accel_to_ug_pixfmt(enum hw_accel_type type)
{
        for (unsigned i = 0;
             i < sizeof(accel_str_map) / sizeof(accel_str_map[0]); i++) {
                if (type == accel_str_map[i].type) {
                        return accel_str_map[i].ug_pixfmt;
                }
        }
        return VIDEO_CODEC_NONE;
}
 
void hwaccel_state_init(struct hw_accel_state *hwaccel){
        hwaccel->type = HWACCEL_NONE;
        hwaccel->copy = false;
        hwaccel->uninit = NULL;
        hwaccel->tmp_frame = NULL;
        hwaccel->uninit = NULL;
        hwaccel->ctx = NULL;
}
 
void hwaccel_state_reset(struct hw_accel_state *hwaccel){
        if(hwaccel->ctx){
                hwaccel->uninit(hwaccel);
        }
 
        if(hwaccel->tmp_frame){
                av_frame_free(&hwaccel->tmp_frame);
        }
 
        hwaccel_state_init(hwaccel);
}
 
#ifdef HWACC_COMMON_IMPL
 
int create_hw_device_ctx(enum AVHWDeviceType type, AVBufferRef **device_ref){
        const char *device_paths[] = { NULL, "/dev/dri/renderD128" };
 
        int ret;
        for(size_t i = 0; i < sizeof(device_paths) / sizeof(*device_paths); i++){
                ret = av_hwdevice_ctx_create(device_ref, type, device_paths[i], NULL, 0);
                if(ret == 0)
                        return 0;
        }
 
        log_msg(LOG_LEVEL_ERROR, "[hw accel] Unable to create hwdevice!!\n");
        return ret;
}
 
int create_hw_frame_ctx(AVBufferRef *device_ref,
                int width,
                int height,
                enum AVPixelFormat format,
                enum AVPixelFormat sw_format,
                int decode_surfaces,
                AVBufferRef **ctx)
{
        *ctx = av_hwframe_ctx_alloc(device_ref);
        if(!*ctx){
                log_msg(LOG_LEVEL_ERROR, "[hw accel] Failed to allocate hwframe_ctx!!\n");
                return -1;
        }
 
        AVHWFramesContext *frames_ctx = (AVHWFramesContext *)(void *) (*ctx)->data;
        frames_ctx->format    = format;
        frames_ctx->width     = width;
        frames_ctx->height    = height;
        frames_ctx->sw_format = sw_format;
        frames_ctx->initial_pool_size = decode_surfaces;
 
        int ret = av_hwframe_ctx_init(*ctx);
        if (ret < 0) {
                av_buffer_unref(ctx);
                *ctx = NULL;
                log_msg(LOG_LEVEL_ERROR, "[hw accel] Unable to init hwframe_ctx: %s\n\n",
                                                av_err2str(ret));
                return ret;
        }
 
        return 0;
}
 
void transfer_frame(struct hw_accel_state *s, AVFrame *frame){
        log_msg(LOG_LEVEL_DEBUG, "[hw accel] HW frame to CPU transfer\n");
        av_hwframe_transfer_data(s->tmp_frame, frame, 0);
 
        av_frame_copy_props(s->tmp_frame, frame);
 
        av_frame_unref(frame);
        av_frame_move_ref(frame, s->tmp_frame);
}
#endif