where is your media file for testinfg
---Original---
From: "刘歧"<l...@chinaffmpeg.org>
Date: 2017/7/11 12:39:31
To: "and patches development discussions FFmpeg"<ffmpeg-devel@ffmpeg.org>;
Cc: "wm4"<nfx...@googlemail.com>;"Mark
Thompson"<s...@jkqxz.net>;"刘歧"<l...@chinaffmpeg.org>;"Liu,
Kaixuan"<kaixuan....@intel.com>;
Subject: Re: [FFmpeg-devel] [PATCH V2] examples/vaapi_dec: Add a VA-APIhwaccel
decoding example
From 0e4d230ae4c98949a962c6bbdad31d216b54bb6a Mon Sep 17 00:00:00 2001
From: Jun Zhao <jun.z...@intel.com>
Date: Tue, 21 Mar 2017 11:04:41 +0800
Subject: [V2] examples/vaapi_dec: Add a VA-API hwaccel decoding example.
Add a VA-API hwaccel decoding example.
Signed-off-by: Liu, Kaixuan <kaixuan....@intel.com>
Signed-off-by: Jun Zhao <jun.z...@intel.com>
---
doc/examples/vaapi_dec.c | 266 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 266 insertions(+)
create mode 100644 doc/examples/vaapi_dec.c
diff --git a/doc/examples/vaapi_dec.c b/doc/examples/vaapi_dec.c
new file mode 100644
index 0000000000..01320a3b71
--- /dev/null
+++ b/doc/examples/vaapi_dec.c
@@ -0,0 +1,266 @@
+/*
+ * Video Acceleration API (video decoding) decode 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 decoding example.
+ *
+ * @example vaapi_dec.c
+ * This example shows how to do VAAPI-accelerated decoding with output
+ * frames from the VAAPI video surfaces.
+ */
+
+#include <stdio.h>
+#include <libavcodec/avcodec.h>
+#include <libavcodec/vaapi.h>
+#include <libavformat/avformat.h>
+#include <libavutil/pixdesc.h>
+#include <libavutil/hwcontext.h>
+#include <libavutil/opt.h>
+#include <libavutil/hwcontext_vaapi.h>
+#include <libavutil/avassert.h>
+
+static AVBufferRef *hw_device_ctx = NULL;
+FILE *output_file = NULL;
+
+int decoder_init_vaapi(AVCodecContext *ctx)
+{
+ int err = 0;
+ const char *dev_name = "/dev/dri/renderD128";
+
+ if ((err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_VAAPI,
+ dev_name, NULL, 0)) < 0) {
+ fprintf(stderr, "Failed to create a VAAPI device.\n");
+ return err;
+ }
+ ctx->hw_device_ctx = av_buffer_ref(hw_device_ctx);
+
+ return err;
+}
+
+static enum AVPixelFormat get_vaapi_format(AVCodecContext *ctx,
+ const enum AVPixelFormat *pix_fmts)
+{
+ const enum AVPixelFormat *p;
+
+ for (p = pix_fmts; *p != -1; p++) {
+ if (*p == AV_PIX_FMT_VAAPI)
+ return *p;
+ }
+
+ return AV_PIX_FMT_NONE;
+}
+
+int retrieve_data(AVFrame *input)
+{
+ AVFrame *output = NULL;
+ int err;
+ av_assert0(input->format == AV_PIX_FMT_VAAPI);
+
+ if (!(output = av_frame_alloc()))
+ return AVERROR(ENOMEM);
+ /* default output nv12 */
+ output->format = AV_PIX_FMT_NV12;
+ if ((err = av_hwframe_transfer_data(output, input, 0)) < 0) {
+ fprintf(stderr, "Failed to transfer data to output frame: %d.\n", err);
+ goto fail;
+ }
+
+ if ((err = av_frame_copy_props(output, input)) < 0) {
+ av_frame_unref(output);
+ goto fail;
+ }
+
+ av_frame_unref(input);
+ av_frame_move_ref(input, output);
+ av_frame_free(&output);
+ return 0;
+
+fail:
+ av_frame_free(&output);
+ return err;
+}
+
+int write_frame(AVFrame *frame)
+{
+ int idx, size;
+ int width = frame->width;
+ int height = frame->height;
+
+ av_assert0(frame && frame->data[0] && output_file);
+
+ for (idx = 0; idx < height; idx++) {
+ if ((size = fwrite(frame->data[0] + idx*frame->linesize[0],
+ 1, width, output_file)) < 0) {
+ fprintf(stderr, "Dump Y to file error.\n");
+ return -1;
+ }
+ }
+
+ height >>= 1;
+ for (idx = 0; idx < height; idx++) {
+ if ((size = fwrite(frame->data[1] + idx*frame->linesize[1],
+ 1, width, output_file)) < 0) {
+ fprintf(stderr, "Dump UV to file error.\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+int decode_write(AVCodecContext *avctx, AVPacket packet, int flush)
+{
+ AVFrame *frame = NULL;
+ int ret = 0;
+
+ ret = avcodec_send_packet(avctx, &packet);
+ if (ret < 0 && ret != AVERROR_EOF)
+ return 0;
+
+ if (!(frame = av_frame_alloc()))
+ return AVERROR(ENOMEM);
+
+ ret = avcodec_receive_frame(avctx, frame);
+ if (ret >= 0) {
+ /* retrieve data from GPU to CPU */
+ if ((ret = retrieve_data(frame)) < 0)
+ goto fail;
+
+ if ((ret = write_frame(frame)) < 0)
+ goto fail;
+ } else if (flush == 0) {
What about !flush? or small than 0?
+ ret = 0;
+ }
+
+fail:
+ av_frame_free(&frame);
+ return ret;
+}
+
+/* flush the decoder */
+int flush(AVCodecContext *avctx)
+{
+ AVPacket packet;
+ int ret = 0;
+
+ av_init_packet(&packet);
+ packet.data = NULL;
+ packet.size = 0;
+
+ while (1) {
+ if ((ret = decode_write(avctx, packet, 1)) < 0)
+ break;
+ }
+ av_packet_unref(&packet);
+
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ AVFormatContext *input_ctx = NULL;
+ int i, video_stream, ret;
+ AVCodecContext *decoder_ctx = NULL;
+ AVCodec *decoder = NULL;
+ AVPacket packet;
+
+ if (argc < 3) {
+ fprintf(stderr, "Usage: %s <input file> <output file>\n", argv[0]);
+ return -1;
+ }
+
+ av_register_all();
+
+ /* open the input file */
+ if (avformat_open_input(&input_ctx, argv[1], NULL, NULL) != 0) {
+ fprintf(stderr, "Cannot open input file '%s'\n", argv[1]);
+ return -1;
+ }
+
+ if (avformat_find_stream_info(input_ctx, NULL) < 0) {
+ fprintf(stderr, "Couldn't find input stream information.\n");
+ goto fail;
+ }
+
+ /* find the video stream information */
+ video_stream = -1;
+ for (i = 0; i < input_ctx->nb_streams; i++) {
+ AVStream *st = input_ctx->streams[i];
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
+ video_stream = i; /* NOTE: just handle the first video
stream */
+ break;
+ }
+ }
+
+ if (video_stream == -1) {
+ fprintf(stderr, "No find a video stream in the input file.\n");
+ goto fail;
+ }
+
+ /* initialize the video decoder */
+ if (!(decoder =
avcodec_find_decoder(input_ctx->streams[video_stream]->codecpar->codec_id))) {
+ fprintf(stderr, "Could not find input codec\n");
+ goto fail;
+ }
+
+ if (!(decoder_ctx = avcodec_alloc_context3(decoder)))
+ return AVERROR(ENOMEM);
+
+ if (avcodec_parameters_to_context(decoder_ctx,
+
input_ctx->streams[video_stream]->codecpar) < 0)
+ goto fail;
+
+ decoder_ctx->get_format = get_vaapi_format;
+ av_opt_set_int(decoder_ctx, "refcounted_frames", 1, 0);
+
+ if (decoder_init_vaapi(decoder_ctx) < 0)
+ goto fail;
+
+ if ((ret = avcodec_open2(decoder_ctx, decoder, NULL)) < 0) {
+ fprintf(stderr, "Failed to open codec for stream #%u\n", i);
+ goto fail;
+ }
+
+ /* open the output file to dump YUV */
+ output_file = fopen(argv[2], "w+");
+
+ /* actual decoding and dump the YUV data */
+ while (av_read_frame(input_ctx, &packet) >= 0) {
+ if (video_stream == packet.stream_index)
+ ret = decode_write(decoder_ctx, packet, 0);
+ av_packet_unref(&packet);
+
+ if (ret < 0)
+ break;
+ }
+
+ /* flush the decoder */
+ flush(decoder_ctx);
+
+fail:
+ if (output_file)
+ fclose(output_file);
+ avcodec_free_context(&decoder_ctx);
+ avformat_close_input(&input_ctx);
+ av_buffer_unref(&hw_device_ctx);
+
+ return ret;
+}
--
2.11.0
> On Jul 11, 2017, at 12:06 PM, Jun Zhao <mypopy...@gmail.com> wrote:
>
> V2: re-work with new hw decoding API.
> <0001-examples-vaapi_dec-Add-a-VA-API-hwaccel-decoding-exa.patch>_______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
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