From 4a6d9312cc1c9d62d66c4def71246d9faae29edb Mon Sep 17 00:00:00 2001
From: zhangmeng <775834166@qq.com>
Date: 星期三, 03 三月 2021 14:26:16 +0800
Subject: [PATCH] environment settings
---
module/VideoPlayer/lib/linux/ffmpeg/share/ffmpeg/examples/vaapi_transcode.c | 306 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 306 insertions(+), 0 deletions(-)
diff --git a/module/VideoPlayer/lib/linux/ffmpeg/share/ffmpeg/examples/vaapi_transcode.c b/module/VideoPlayer/lib/linux/ffmpeg/share/ffmpeg/examples/vaapi_transcode.c
new file mode 100644
index 0000000..279d20f
--- /dev/null
+++ b/module/VideoPlayer/lib/linux/ffmpeg/share/ffmpeg/examples/vaapi_transcode.c
@@ -0,0 +1,306 @@
+/*
+ * Video Acceleration API (video transcoding) transcode sample
+ *
+ * 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 VAAPI-accelerated transcoding example.
+ *
+ * @example vaapi_transcode.c
+ * This example shows how to do VAAPI-accelerated transcoding.
+ * Usage: vaapi_transcode input_stream codec output_stream
+ * e.g: - vaapi_transcode input.mp4 h264_vaapi output_h264.mp4
+ * - vaapi_transcode input.mp4 vp9_vaapi output_vp9.ivf
+ */
+
+#include <stdio.h>
+#include <errno.h>
+
+#include <libavutil/hwcontext.h>
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+
+static AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL;
+static AVBufferRef *hw_device_ctx = NULL;
+static AVCodecContext *decoder_ctx = NULL, *encoder_ctx = NULL;
+static int video_stream = -1;
+static AVStream *ost;
+static int initialized = 0;
+
+static enum AVPixelFormat get_vaapi_format(AVCodecContext *ctx,
+ const enum AVPixelFormat *pix_fmts)
+{
+ const enum AVPixelFormat *p;
+
+ for (p = pix_fmts; *p != AV_PIX_FMT_NONE; p++) {
+ if (*p == AV_PIX_FMT_VAAPI)
+ return *p;
+ }
+
+ fprintf(stderr, "Unable to decode this file using VA-API.\n");
+ return AV_PIX_FMT_NONE;
+}
+
+static int open_input_file(const char *filename)
+{
+ int ret;
+ AVCodec *decoder = NULL;
+ AVStream *video = NULL;
+
+ if ((ret = avformat_open_input(&ifmt_ctx, filename, NULL, NULL)) < 0) {
+ fprintf(stderr, "Cannot open input file '%s', Error code: %s\n",
+ filename, av_err2str(ret));
+ return ret;
+ }
+
+ if ((ret = avformat_find_stream_info(ifmt_ctx, NULL)) < 0) {
+ fprintf(stderr, "Cannot find input stream information. Error code: %s\n",
+ av_err2str(ret));
+ return ret;
+ }
+
+ ret = av_find_best_stream(ifmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, &decoder, 0);
+ if (ret < 0) {
+ fprintf(stderr, "Cannot find a video stream in the input file. "
+ "Error code: %s\n", av_err2str(ret));
+ return ret;
+ }
+ video_stream = ret;
+
+ if (!(decoder_ctx = avcodec_alloc_context3(decoder)))
+ return AVERROR(ENOMEM);
+
+ video = ifmt_ctx->streams[video_stream];
+ if ((ret = avcodec_parameters_to_context(decoder_ctx, video->codecpar)) < 0) {
+ fprintf(stderr, "avcodec_parameters_to_context error. Error code: %s\n",
+ av_err2str(ret));
+ return ret;
+ }
+
+ decoder_ctx->hw_device_ctx = av_buffer_ref(hw_device_ctx);
+ if (!decoder_ctx->hw_device_ctx) {
+ fprintf(stderr, "A hardware device reference create failed.\n");
+ return AVERROR(ENOMEM);
+ }
+ decoder_ctx->get_format = get_vaapi_format;
+
+ if ((ret = avcodec_open2(decoder_ctx, decoder, NULL)) < 0)
+ fprintf(stderr, "Failed to open codec for decoding. Error code: %s\n",
+ av_err2str(ret));
+
+ return ret;
+}
+
+static int encode_write(AVFrame *frame)
+{
+ int ret = 0;
+ AVPacket enc_pkt;
+
+ av_init_packet(&enc_pkt);
+ enc_pkt.data = NULL;
+ enc_pkt.size = 0;
+
+ if ((ret = avcodec_send_frame(encoder_ctx, frame)) < 0) {
+ fprintf(stderr, "Error during encoding. Error code: %s\n", av_err2str(ret));
+ goto end;
+ }
+ while (1) {
+ ret = avcodec_receive_packet(encoder_ctx, &enc_pkt);
+ if (ret)
+ break;
+
+ enc_pkt.stream_index = 0;
+ av_packet_rescale_ts(&enc_pkt, ifmt_ctx->streams[video_stream]->time_base,
+ ofmt_ctx->streams[0]->time_base);
+ ret = av_interleaved_write_frame(ofmt_ctx, &enc_pkt);
+ if (ret < 0) {
+ fprintf(stderr, "Error during writing data to output file. "
+ "Error code: %s\n", av_err2str(ret));
+ return -1;
+ }
+ }
+
+end:
+ if (ret == AVERROR_EOF)
+ return 0;
+ ret = ((ret == AVERROR(EAGAIN)) ? 0:-1);
+ return ret;
+}
+
+static int dec_enc(AVPacket *pkt, AVCodec *enc_codec)
+{
+ AVFrame *frame;
+ int ret = 0;
+
+ ret = avcodec_send_packet(decoder_ctx, pkt);
+ if (ret < 0) {
+ fprintf(stderr, "Error during decoding. Error code: %s\n", av_err2str(ret));
+ return ret;
+ }
+
+ while (ret >= 0) {
+ if (!(frame = av_frame_alloc()))
+ return AVERROR(ENOMEM);
+
+ ret = avcodec_receive_frame(decoder_ctx, frame);
+ if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
+ av_frame_free(&frame);
+ return 0;
+ } else if (ret < 0) {
+ fprintf(stderr, "Error while decoding. Error code: %s\n", av_err2str(ret));
+ goto fail;
+ }
+
+ if (!initialized) {
+ /* we need to ref hw_frames_ctx of decoder to initialize encoder's codec.
+ Only after we get a decoded frame, can we obtain its hw_frames_ctx */
+ encoder_ctx->hw_frames_ctx = av_buffer_ref(decoder_ctx->hw_frames_ctx);
+ if (!encoder_ctx->hw_frames_ctx) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ /* set AVCodecContext Parameters for encoder, here we keep them stay
+ * the same as decoder.
+ * xxx: now the sample can't handle resolution change case.
+ */
+ encoder_ctx->time_base = av_inv_q(decoder_ctx->framerate);
+ encoder_ctx->pix_fmt = AV_PIX_FMT_VAAPI;
+ encoder_ctx->width = decoder_ctx->width;
+ encoder_ctx->height = decoder_ctx->height;
+
+ if ((ret = avcodec_open2(encoder_ctx, enc_codec, NULL)) < 0) {
+ fprintf(stderr, "Failed to open encode codec. Error code: %s\n",
+ av_err2str(ret));
+ goto fail;
+ }
+
+ if (!(ost = avformat_new_stream(ofmt_ctx, enc_codec))) {
+ fprintf(stderr, "Failed to allocate stream for output format.\n");
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ ost->time_base = encoder_ctx->time_base;
+ ret = avcodec_parameters_from_context(ost->codecpar, encoder_ctx);
+ if (ret < 0) {
+ fprintf(stderr, "Failed to copy the stream parameters. "
+ "Error code: %s\n", av_err2str(ret));
+ goto fail;
+ }
+
+ /* write the stream header */
+ if ((ret = avformat_write_header(ofmt_ctx, NULL)) < 0) {
+ fprintf(stderr, "Error while writing stream header. "
+ "Error code: %s\n", av_err2str(ret));
+ goto fail;
+ }
+
+ initialized = 1;
+ }
+
+ if ((ret = encode_write(frame)) < 0)
+ fprintf(stderr, "Error during encoding and writing.\n");
+
+fail:
+ av_frame_free(&frame);
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ int ret = 0;
+ AVPacket dec_pkt;
+ AVCodec *enc_codec;
+
+ if (argc != 4) {
+ fprintf(stderr, "Usage: %s <input file> <encode codec> <output file>\n"
+ "The output format is guessed according to the file extension.\n"
+ "\n", argv[0]);
+ return -1;
+ }
+
+ ret = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_VAAPI, NULL, NULL, 0);
+ if (ret < 0) {
+ fprintf(stderr, "Failed to create a VAAPI device. Error code: %s\n", av_err2str(ret));
+ return -1;
+ }
+
+ if ((ret = open_input_file(argv[1])) < 0)
+ goto end;
+
+ if (!(enc_codec = avcodec_find_encoder_by_name(argv[2]))) {
+ fprintf(stderr, "Could not find encoder '%s'\n", argv[2]);
+ ret = -1;
+ goto end;
+ }
+
+ if ((ret = (avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, argv[3]))) < 0) {
+ fprintf(stderr, "Failed to deduce output format from file extension. Error code: "
+ "%s\n", av_err2str(ret));
+ goto end;
+ }
+
+ if (!(encoder_ctx = avcodec_alloc_context3(enc_codec))) {
+ ret = AVERROR(ENOMEM);
+ goto end;
+ }
+
+ ret = avio_open(&ofmt_ctx->pb, argv[3], AVIO_FLAG_WRITE);
+ if (ret < 0) {
+ fprintf(stderr, "Cannot open output file. "
+ "Error code: %s\n", av_err2str(ret));
+ goto end;
+ }
+
+ /* read all packets and only transcoding video */
+ while (ret >= 0) {
+ if ((ret = av_read_frame(ifmt_ctx, &dec_pkt)) < 0)
+ break;
+
+ if (video_stream == dec_pkt.stream_index)
+ ret = dec_enc(&dec_pkt, enc_codec);
+
+ av_packet_unref(&dec_pkt);
+ }
+
+ /* flush decoder */
+ dec_pkt.data = NULL;
+ dec_pkt.size = 0;
+ ret = dec_enc(&dec_pkt, enc_codec);
+ av_packet_unref(&dec_pkt);
+
+ /* flush encoder */
+ ret = encode_write(NULL);
+
+ /* write the trailer for output stream */
+ av_write_trailer(ofmt_ctx);
+
+end:
+ avformat_close_input(&ifmt_ctx);
+ avformat_close_input(&ofmt_ctx);
+ avcodec_free_context(&decoder_ctx);
+ avcodec_free_context(&encoder_ctx);
+ av_buffer_unref(&hw_device_ctx);
+ return ret;
+}
--
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