/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "config.h" #include "libavutil/avassert.h"#include "libavutil/frame.h"#include "libavutil/hwcontext.h"#include "libavutil/log.h" #include "ffmpeg.h"  static AVClass vaapi_class = {    .class_name = "vaapi",    .item_name  = av_default_item_name,    .version    = LIBAVUTIL_VERSION_INT,}; #define DEFAULT_SURFACES 20 typedef struct VAAPIDecoderContext {    const AVClass *class;     AVBufferRef       *device_ref;    AVHWDeviceContext *device;    AVBufferRef       *frames_ref;    AVHWFramesContext *frames;     // The output need not have the same format, width and height as the    // decoded frames - the copy for non-direct-mapped access is actually    // a whole vpp instance which can do arbitrary scaling and format    // conversion.    enum AVPixelFormat output_format;} VAAPIDecoderContext;  static int vaapi_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags){    InputStream *ist = avctx->opaque;    VAAPIDecoderContext *ctx = ist->hwaccel_ctx;    int err;     err = av_hwframe_get_buffer(ctx->frames_ref, frame, 0);    if (err < 0) {        av_log(ctx, AV_LOG_ERROR, "Failed to allocate decoder surface.\n");    } else {        av_log(ctx, AV_LOG_DEBUG, "Decoder given surface %#x.\n",               (unsigned int)(uintptr_t)frame->data[3]);    }    return err;} static int vaapi_retrieve_data(AVCodecContext *avctx, AVFrame *input){    InputStream *ist = avctx->opaque;    VAAPIDecoderContext *ctx = ist->hwaccel_ctx;    AVFrame *output = 0;    int err;     av_assert0(input->format == AV_PIX_FMT_VAAPI);     if (ctx->output_format == AV_PIX_FMT_VAAPI) {        // Nothing to do.        return 0;    }     av_log(ctx, AV_LOG_DEBUG, "Retrieve data from surface %#x.\n",           (unsigned int)(uintptr_t)input->data[3]);     output = av_frame_alloc();    if (!output)        return AVERROR(ENOMEM);     output->format = ctx->output_format;     err = av_hwframe_transfer_data(output, input, 0);    if (err < 0) {        av_log(ctx, AV_LOG_ERROR, "Failed to transfer data to "               "output frame: %d.\n", err);        goto fail;    }     err = av_frame_copy_props(output, input);    if (err < 0) {        av_frame_unref(output);        goto fail;    }     av_frame_unref(input);    av_frame_move_ref(input, output);    av_frame_free(&output);     return 0; fail:    if (output)        av_frame_free(&output);    return err;} static void vaapi_decode_uninit(AVCodecContext *avctx){    InputStream *ist = avctx->opaque;    VAAPIDecoderContext *ctx = ist->hwaccel_ctx;     if (ctx) {        av_buffer_unref(&ctx->frames_ref);        av_buffer_unref(&ctx->device_ref);        av_free(ctx);    }     av_buffer_unref(&ist->hw_frames_ctx);     ist->hwaccel_ctx           = NULL;    ist->hwaccel_uninit        = NULL;    ist->hwaccel_get_buffer    = NULL;    ist->hwaccel_retrieve_data = NULL;} int vaapi_decode_init(AVCodecContext *avctx){    InputStream *ist = avctx->opaque;    VAAPIDecoderContext *ctx;    int err;    int loglevel = (ist->hwaccel_id != HWACCEL_VAAPI ? AV_LOG_VERBOSE                                                     : AV_LOG_ERROR);     if (ist->hwaccel_ctx)        vaapi_decode_uninit(avctx);     // We have -hwaccel without -vaapi_device, so just initialise here with    // the device passed as -hwaccel_device (if -vaapi_device was passed, it    // will always have been called before now).    if (!hw_device_ctx) {        err = vaapi_device_init(ist->hwaccel_device);        if (err < 0)            return err;    }     ctx = av_mallocz(sizeof(*ctx));    if (!ctx)        return AVERROR(ENOMEM);    ctx->class = &vaapi_class;    ist->hwaccel_ctx = ctx;     ctx->device_ref = av_buffer_ref(hw_device_ctx);    ctx->device = (AVHWDeviceContext*)ctx->device_ref->data;     ctx->output_format = ist->hwaccel_output_format;    avctx->pix_fmt = ctx->output_format;     ctx->frames_ref = av_hwframe_ctx_alloc(ctx->device_ref);    if (!ctx->frames_ref) {        av_log(ctx, loglevel, "Failed to create VAAPI frame context.\n");        err = AVERROR(ENOMEM);        goto fail;    }     ctx->frames = (AVHWFramesContext*)ctx->frames_ref->data;     ctx->frames->format = AV_PIX_FMT_VAAPI;    ctx->frames->width  = avctx->coded_width;    ctx->frames->height = avctx->coded_height;     // It would be nice if we could query the available formats here,    // but unfortunately we don't have a VAConfigID to do it with.    // For now, just assume an NV12 format (or P010 if 10-bit).    ctx->frames->sw_format = (avctx->sw_pix_fmt == AV_PIX_FMT_YUV420P10 ?                              AV_PIX_FMT_P010 : AV_PIX_FMT_NV12);     // For frame-threaded decoding, at least one additional surface    // is needed for each thread.    ctx->frames->initial_pool_size = DEFAULT_SURFACES;    if (avctx->active_thread_type & FF_THREAD_FRAME)        ctx->frames->initial_pool_size += avctx->thread_count;     err = av_hwframe_ctx_init(ctx->frames_ref);    if (err < 0) {        av_log(ctx, loglevel, "Failed to initialise VAAPI frame "               "context: %d\n", err);        goto fail;    }     ist->hw_frames_ctx = av_buffer_ref(ctx->frames_ref);    if (!ist->hw_frames_ctx) {        err = AVERROR(ENOMEM);        goto fail;    }     ist->hwaccel_uninit        = &vaapi_decode_uninit;    ist->hwaccel_get_buffer    = &vaapi_get_buffer;    ist->hwaccel_retrieve_data = &vaapi_retrieve_data;     return 0; fail:    vaapi_decode_uninit(avctx);    return err;} static AVClass *vaapi_log = &vaapi_class; av_cold int vaapi_device_init(const char *device){    int err;     av_buffer_unref(&hw_device_ctx);     err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_VAAPI,                                 device, NULL, 0);    if (err < 0) {        av_log(&vaapi_log, AV_LOG_ERROR, "Failed to create a VAAPI device\n");        return err;    }     return 0;}