From 23db3a1ae6d1be3438aec73c4dc91185d7958300 Mon Sep 17 00:00:00 2001 From: Jun Zhao Date: Mon, 6 Nov 2017 14:45:27 +0800 Subject: [PATCH] examples: Add a VA-API encode example. Supports only raw NV12 input. Example use: ./vaapi_encode 1920 1080 test.yuv test.h264 Signed-off-by: Jun Zhao Signed-off-by: Liu, Kaixuan Signed-off-by: Mark Thompson --- configure | 2 + doc/examples/Makefile | 1 + doc/examples/vaapi_encode.c | 224 ++++++++++++++++++++++++++++++++++++ 3 files changed, 227 insertions(+) create mode 100644 doc/examples/vaapi_encode.c diff --git a/configure b/configure index 28902d41f5..11eeeaa609 100755 --- a/configure +++ b/configure @@ -1522,6 +1522,7 @@ EXAMPLE_LIST=" scaling_video_example transcode_aac_example transcoding_example + vaapi_encode_example " EXTERNAL_AUTODETECT_LIBRARY_LIST=" @@ -3300,6 +3301,7 @@ resampling_audio_example_deps="avutil swresample" scaling_video_example_deps="avutil swscale" transcode_aac_example_deps="avcodec avformat swresample" transcoding_example_deps="avfilter avcodec avformat avutil" +vaapi_encode_example_deps="avcodec avutil" # EXTRALIBS_LIST cpu_init_extralibs="pthreads_extralibs" diff --git a/doc/examples/Makefile b/doc/examples/Makefile index 58afd71b85..da5af36532 100644 --- a/doc/examples/Makefile +++ b/doc/examples/Makefile @@ -19,6 +19,7 @@ EXAMPLES-$(CONFIG_RESAMPLING_AUDIO_EXAMPLE) += resampling_audio EXAMPLES-$(CONFIG_SCALING_VIDEO_EXAMPLE) += scaling_video EXAMPLES-$(CONFIG_TRANSCODE_AAC_EXAMPLE) += transcode_aac EXAMPLES-$(CONFIG_TRANSCODING_EXAMPLE) += transcoding +EXAMPLES-$(CONFIG_VAAPI_ENCODE_EXAMPLE) += vaapi_encode EXAMPLES := $(EXAMPLES-yes:%=doc/examples/%$(PROGSSUF)$(EXESUF)) EXAMPLES_G := $(EXAMPLES-yes:%=doc/examples/%$(PROGSSUF)_g$(EXESUF)) diff --git a/doc/examples/vaapi_encode.c b/doc/examples/vaapi_encode.c new file mode 100644 index 0000000000..866b03d58c --- /dev/null +++ b/doc/examples/vaapi_encode.c @@ -0,0 +1,224 @@ +/* + * 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 +#include +#include + +#include +#include +#include + +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)); + 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 \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; + } + + avcodec_register_all(); + + 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); + if (avctx) + avcodec_free_context(&avctx); + av_buffer_unref(&hw_device_ctx); + + return err; +}