It is an evolution from the exmaple "encode_video.c" to support qsv encoder.
V1->V2: Split to a separated qsv encoding example, instead of a patch based on encode_video.c Signed-off-by: Zhong Li <zhong...@intel.com> --- configure | 2 + doc/Makefile | 1 + doc/examples/qsvenc.c | 211 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 214 insertions(+) create mode 100644 doc/examples/qsvenc.c diff --git a/configure b/configure index 66c7b94..676cd85 100755 --- a/configure +++ b/configure @@ -1472,6 +1472,7 @@ EXAMPLE_LIST=" metadata_example muxing_example qsvdec_example + qsvenc_example remuxing_example resampling_audio_example scaling_video_example @@ -3213,6 +3214,7 @@ hw_decode_example_deps="avcodec avformat avutil" metadata_example_deps="avformat avutil" muxing_example_deps="avcodec avformat avutil swscale" qsvdec_example_deps="avcodec avutil libmfx h264_qsv_decoder" +qsvenc_example_deps="avcodec avutil libmfx" remuxing_example_deps="avcodec avformat avutil" resampling_audio_example_deps="avutil swresample" scaling_video_example_deps="avutil swscale" diff --git a/doc/Makefile b/doc/Makefile index b670f0b..ed41763 100644 --- a/doc/Makefile +++ b/doc/Makefile @@ -52,6 +52,7 @@ DOC_EXAMPLES-$(CONFIG_HW_DECODE_EXAMPLE) += hw_decode DOC_EXAMPLES-$(CONFIG_METADATA_EXAMPLE) += metadata DOC_EXAMPLES-$(CONFIG_MUXING_EXAMPLE) += muxing DOC_EXAMPLES-$(CONFIG_QSVDEC_EXAMPLE) += qsvdec +DOC_EXAMPLES-$(CONFIG_QSVENC_EXAMPLE) += qsvenc DOC_EXAMPLES-$(CONFIG_REMUXING_EXAMPLE) += remuxing DOC_EXAMPLES-$(CONFIG_RESAMPLING_AUDIO_EXAMPLE) += resampling_audio DOC_EXAMPLES-$(CONFIG_SCALING_VIDEO_EXAMPLE) += scaling_video diff --git a/doc/examples/qsvenc.c b/doc/examples/qsvenc.c new file mode 100644 index 0000000..3b94cc8 --- /dev/null +++ b/doc/examples/qsvenc.c @@ -0,0 +1,211 @@ +/* + * Copyright (c) 2017 Fabrice Bellard, Zhong Li + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +/** + * @file + * Intel QSV-accelerated encoding example + * + * @example qsvenc.c + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <libavcodec/avcodec.h> + +#include <libavutil/opt.h> +#include <libavutil/imgutils.h> +#include "libavutil/buffer.h" +#include "libavutil/hwcontext.h" + +static void encode(AVCodecContext *enc_ctx, AVFrame *frame, AVPacket *pkt, + FILE *outfile) +{ + int ret; + + /* send the frame to the encoder */ + if (frame) + printf("Send frame %3"PRId64"\n", frame->pts); + + ret = avcodec_send_frame(enc_ctx, frame); + if (ret < 0) { + fprintf(stderr, "Error sending a frame for encoding\n"); + exit(1); + } + + while (ret >= 0) { + ret = avcodec_receive_packet(enc_ctx, pkt); + if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) + return; + else if (ret < 0) { + fprintf(stderr, "Error during encoding\n"); + exit(1); + } + + printf("Write packet %3"PRId64" (size=%5d)\n", pkt->pts, pkt->size); + fwrite(pkt->data, 1, pkt->size, outfile); + av_packet_unref(pkt); + } +} + +int main(int argc, char **argv) +{ + const char *filename, *codec_name; + const AVCodec *codec; + AVCodecContext *c= NULL; + int i, ret, x, y; + FILE *f; + AVFrame *frame; + AVPacket *pkt; + AVBufferRef *encode_device = NULL; + + if (argc <= 2) { + fprintf(stderr, "Usage: %s <output file> <codec name>\n", argv[0]); + exit(0); + } + filename = argv[1]; + codec_name = argv[2]; + + if (!strstr(codec_name, "qsv")) { + fprintf(stderr, "no qsv codec found\n"); + exit(0); + } + + avcodec_register_all(); + + /* open the qsv hardware device */ + ret = av_hwdevice_ctx_create(&encode_device, AV_HWDEVICE_TYPE_QSV, + NULL, NULL, 0); + if (ret < 0) { + fprintf(stderr, "Cannot open the hardware device\n"); + exit(1); + } + + /* find the encoder */ + codec = avcodec_find_encoder_by_name(codec_name); + if (!codec) { + fprintf(stderr, "Codec '%s' not found\n", codec_name); + exit(1); + } + + c = avcodec_alloc_context3(codec); + if (!c) { + fprintf(stderr, "Could not allocate video codec context\n"); + exit(1); + } + + pkt = av_packet_alloc(); + if (!pkt) + exit(1); + + /* put sample parameters */ + c->bit_rate = 400000; + /* resolution must be a multiple of two */ + c->width = 352; + c->height = 288; + /* frames per second */ + c->time_base = (AVRational){1, 25}; + c->framerate = (AVRational){25, 1}; + + /* emit one intra frame every ten frames + * check frame pict_type before passing frame + * to encoder, if frame->pict_type is AV_PICTURE_TYPE_I + * then gop_size is ignored and the output of encoder + * will always be I frame irrespective to gop_size + */ + c->gop_size = 10; + c->max_b_frames = 1; + c->pix_fmt = AV_PIX_FMT_NV12; + c->hw_device_ctx = av_buffer_ref(encode_device); + + /* open it */ + ret = avcodec_open2(c, codec, NULL); + if (ret < 0) { + fprintf(stderr, "Could not open codec: %s\n", av_err2str(ret)); + exit(1); + } + + f = fopen(filename, "wb"); + if (!f) { + fprintf(stderr, "Could not open %s\n", filename); + exit(1); + } + + frame = av_frame_alloc(); + if (!frame) { + fprintf(stderr, "Could not allocate video frame\n"); + exit(1); + } + frame->format = c->pix_fmt; + frame->width = c->width; + frame->height = c->height; + + ret = av_frame_get_buffer(frame, 32); + if (ret < 0) { + fprintf(stderr, "Could not allocate the video frame data\n"); + exit(1); + } + + /* encode 1 second of video */ + for (i = 0; i < 25; i++) { + fflush(stdout); + + /* make sure the frame data is writable */ + ret = av_frame_make_writable(frame); + if (ret < 0) + exit(1); + + /* prepare a dummy image */ + /* Y */ + for (y = 0; y < c->height; y++) { + for (x = 0; x < c->width; x++) { + frame->data[0][y * frame->linesize[0] + x] = x + y + i * 3; + } + } + + /* Cb and Cr */ + for (y = 0; y < c->height/2; y++) { + for (x = 0; x < c->width/2; x++) { + frame->data[1][y * frame->linesize[1] + 2 * x] = 128 + y + i * 2; + frame->data[1][y * frame->linesize[1] + 2 * x + 1] = 64 + x + i * 5; + } + } + + frame->pts = i; + + /* encode the image */ + encode(c, frame, pkt, f); + } + + /* flush the encoder */ + encode(c, NULL, pkt, f); + + fclose(f); + + avcodec_free_context(&c); + av_frame_free(&frame); + av_packet_free(&pkt); + av_buffer_unref(&encode_device); + + return 0; +} -- 1.8.3.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel