/* * Video Acceleration API (video encoding) encode sample * * 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 */ /** * @file * Intel VAAPI-accelerated encoding example. * * @example vaapi_encode.c * This example shows how to do VAAPI-accelerated encoding. now only support NV12 * raw file, usage like: vaapi_encode 1920 1080 input.yuv output.h264 * */ #include <stdio.h>#include <string.h>#include <errno.h> #include <libavcodec/avcodec.h>#include <libavutil/pixdesc.h>#include <libavutil/hwcontext.h> static int width, height;static AVBufferRef *hw_device_ctx = NULL; static int set_hwframe_ctx(AVCodecContext *ctx, AVBufferRef *hw_device_ctx){    AVBufferRef *hw_frames_ref;    AVHWFramesContext *frames_ctx = NULL;    int err = 0;     if (!(hw_frames_ref = av_hwframe_ctx_alloc(hw_device_ctx))) {        fprintf(stderr, "Failed to create VAAPI frame context.\n");        return -1;    }    frames_ctx = (AVHWFramesContext *)(hw_frames_ref->data);    frames_ctx->format    = AV_PIX_FMT_VAAPI;    frames_ctx->sw_format = AV_PIX_FMT_NV12;    frames_ctx->width     = width;    frames_ctx->height    = height;    frames_ctx->initial_pool_size = 20;    if ((err = av_hwframe_ctx_init(hw_frames_ref)) < 0) {        fprintf(stderr, "Failed to initialize VAAPI frame context."                "Error code: %s\n",av_err2str(err));        av_buffer_unref(&hw_frames_ref);        return err;    }    ctx->hw_frames_ctx = av_buffer_ref(hw_frames_ref);    if (!ctx->hw_frames_ctx)        err = AVERROR(ENOMEM);     av_buffer_unref(&hw_frames_ref);    return err;} static int encode_write(AVCodecContext *avctx, AVFrame *frame, FILE *fout){    int ret = 0;    AVPacket enc_pkt;     av_init_packet(&enc_pkt);    enc_pkt.data = NULL;    enc_pkt.size = 0;     if ((ret = avcodec_send_frame(avctx, frame)) < 0) {        fprintf(stderr, "Error code: %s\n", av_err2str(ret));        goto end;    }    while (1) {        ret = avcodec_receive_packet(avctx, &enc_pkt);        if (ret)            break;         enc_pkt.stream_index = 0;        ret = fwrite(enc_pkt.data, enc_pkt.size, 1, fout);        av_packet_unref(&enc_pkt);    } end:    ret = ((ret == AVERROR(EAGAIN)) ? 0 : -1);    return ret;} int main(int argc, char *argv[]){    int size, err;    FILE *fin = NULL, *fout = NULL;    AVFrame *sw_frame = NULL, *hw_frame = NULL;    AVCodecContext *avctx = NULL;    AVCodec *codec = NULL;    const char *enc_name = "h264_vaapi";     if (argc < 5) {        fprintf(stderr, "Usage: %s <width> <height> <input file> <output file>\n", argv[0]);        return -1;    }     width  = atoi(argv[1]);    height = atoi(argv[2]);    size   = width * height;     if (!(fin = fopen(argv[3], "r"))) {        fprintf(stderr, "Fail to open input file : %s\n", strerror(errno));        return -1;    }    if (!(fout = fopen(argv[4], "w+b"))) {        fprintf(stderr, "Fail to open output file : %s\n", strerror(errno));        err = -1;        goto close;    }     err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_VAAPI,                                 NULL, NULL, 0);    if (err < 0) {        fprintf(stderr, "Failed to create a VAAPI device. Error code: %s\n", av_err2str(err));        goto close;    }     if (!(codec = avcodec_find_encoder_by_name(enc_name))) {        fprintf(stderr, "Could not find encoder.\n");        err = -1;        goto close;    }     if (!(avctx = avcodec_alloc_context3(codec))) {        err = AVERROR(ENOMEM);        goto close;    }     avctx->width     = width;    avctx->height    = height;    avctx->time_base = (AVRational){1, 25};    avctx->framerate = (AVRational){25, 1};    avctx->sample_aspect_ratio = (AVRational){1, 1};    avctx->pix_fmt   = AV_PIX_FMT_VAAPI;     /* set hw_frames_ctx for encoder's AVCodecContext */    if ((err = set_hwframe_ctx(avctx, hw_device_ctx)) < 0) {        fprintf(stderr, "Failed to set hwframe context.\n");        goto close;    }     if ((err = avcodec_open2(avctx, codec, NULL)) < 0) {        fprintf(stderr, "Cannot open video encoder codec. Error code: %s\n", av_err2str(err));        goto close;    }     while (1) {        if (!(sw_frame = av_frame_alloc())) {            err = AVERROR(ENOMEM);            goto close;        }        /* read data into software frame, and transfer them into hw frame */        sw_frame->width  = width;        sw_frame->height = height;        sw_frame->format = AV_PIX_FMT_NV12;        if ((err = av_frame_get_buffer(sw_frame, 32)) < 0)            goto close;        if ((err = fread((uint8_t*)(sw_frame->data[0]), size, 1, fin)) <= 0)            break;        if ((err = fread((uint8_t*)(sw_frame->data[1]), size/2, 1, fin)) <= 0)            break;         if (!(hw_frame = av_frame_alloc())) {            err = AVERROR(ENOMEM);            goto close;        }        if ((err = av_hwframe_get_buffer(avctx->hw_frames_ctx, hw_frame, 0)) < 0) {            fprintf(stderr, "Error code: %s.\n", av_err2str(err));            goto close;        }        if (!hw_frame->hw_frames_ctx) {            err = AVERROR(ENOMEM);            goto close;        }        if ((err = av_hwframe_transfer_data(hw_frame, sw_frame, 0)) < 0) {            fprintf(stderr, "Error while transferring frame data to surface."                    "Error code: %s.\n", av_err2str(err));            goto close;        }         if ((err = (encode_write(avctx, hw_frame, fout))) < 0) {            fprintf(stderr, "Failed to encode.\n");            goto close;        }        av_frame_free(&hw_frame);        av_frame_free(&sw_frame);    }     /* flush encoder */    err = encode_write(avctx, NULL, fout);    if (err == AVERROR_EOF)        err = 0; close:    if (fin)        fclose(fin);    if (fout)        fclose(fout);    av_frame_free(&sw_frame);    av_frame_free(&hw_frame);    avcodec_free_context(&avctx);    av_buffer_unref(&hw_device_ctx);     return err;}