[FFmpeg-devel] [PATCH 3/3] doc/examples: add QSV decode GPU copy sample
Linjie Fu
linjie.fu at intel.com
Tue Mar 26 07:39:49 EET 2019
Usage is:
./qsvdec_gpucopy on/off input_stream output_stream
For example:
- enable/disable gpu copy:
./qsvdec_gpucopy on input.h264 output.yuv
./qsvdec_gpucopy off input.h264 output.yuv
Generate fps per second.
Signed-off-by: Linjie Fu <linjie.fu at intel.com>
---
configure | 2 +
doc/examples/Makefile | 1 +
doc/examples/qsvdec_gpucopy.c | 276 ++++++++++++++++++++++++++++++++++
3 files changed, 279 insertions(+)
create mode 100644 doc/examples/qsvdec_gpucopy.c
diff --git a/configure b/configure
index 331393f8d5..579ab9ea4a 100755
--- a/configure
+++ b/configure
@@ -1667,6 +1667,7 @@ EXAMPLE_LIST="
metadata_example
muxing_example
qsvdec_example
+ qsvdec_gpucopy_example
remuxing_example
resampling_audio_example
scaling_video_example
@@ -3550,6 +3551,7 @@ 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"
+qsvdec_gpucopy_example_deps="avcodec avutil avformat"
remuxing_example_deps="avcodec avformat avutil"
resampling_audio_example_deps="avutil swresample"
scaling_video_example_deps="avutil swscale"
diff --git a/doc/examples/Makefile b/doc/examples/Makefile
index 2935424e54..188ef0abf1 100644
--- a/doc/examples/Makefile
+++ b/doc/examples/Makefile
@@ -14,6 +14,7 @@ EXAMPLES-$(CONFIG_HW_DECODE_EXAMPLE) += hw_decode
EXAMPLES-$(CONFIG_METADATA_EXAMPLE) += metadata
EXAMPLES-$(CONFIG_MUXING_EXAMPLE) += muxing
EXAMPLES-$(CONFIG_QSVDEC_EXAMPLE) += qsvdec
+EXAMPLES-$(CONFIG_QSVDEC_GPUCOPY_EXAMPLE) += qsvdec_gpucopy
EXAMPLES-$(CONFIG_REMUXING_EXAMPLE) += remuxing
EXAMPLES-$(CONFIG_RESAMPLING_AUDIO_EXAMPLE) += resampling_audio
EXAMPLES-$(CONFIG_SCALING_VIDEO_EXAMPLE) += scaling_video
diff --git a/doc/examples/qsvdec_gpucopy.c b/doc/examples/qsvdec_gpucopy.c
new file mode 100644
index 0000000000..244cf6c6a0
--- /dev/null
+++ b/doc/examples/qsvdec_gpucopy.c
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 2019 Linjie Fu
+ *
+ * HW Acceleration API (video decoding) decode 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
+ * QSV-Accelerated H264 decoding GPU Copy example.
+ *
+ * @example qsvdec_gpucopy.c
+ * This example shows how to do QSV decode with GPU Copy
+ */
+
+#include <stdio.h>
+
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+#include <libavutil/avassert.h>
+#include <libavutil/hwcontext.h>
+#include <libavutil/imgutils.h>
+#include <libavutil/opt.h>
+#include <libavutil/pixdesc.h>
+
+#include "libavcodec/qsv.h"
+#include <sys/time.h>
+
+static AVBufferRef *hw_device_ctx = NULL;
+static enum AVPixelFormat hw_pix_fmt;
+static FILE *output_file = NULL;
+static int g_frame_count = 0;
+int g_avg_fps = 0;
+struct timeval pre_timestamp, cur_timestamp;
+
+static int hw_decoder_init(AVCodecContext *ctx,
+ const enum AVHWDeviceType type) {
+ int err = 0;
+
+ if ((err = av_hwdevice_ctx_create(&hw_device_ctx, type, NULL, NULL, 0)) <
+ 0) {
+ fprintf(stderr, "Failed to create specified HW device.\n");
+ return err;
+ }
+ ctx->hw_device_ctx = av_buffer_ref(hw_device_ctx);
+
+ return err;
+}
+
+static enum AVPixelFormat get_hw_format(AVCodecContext *ctx,
+ const enum AVPixelFormat *pix_fmts) {
+ const enum AVPixelFormat *p;
+
+ for (p = pix_fmts; *p != -1; p++) {
+ if (*p == hw_pix_fmt) return *p;
+ }
+
+ fprintf(stderr, "Failed to get HW surface format.\n");
+ return AV_PIX_FMT_NONE;
+}
+
+static int decode_write(AVCodecContext *avctx, AVPacket *packet) {
+ AVFrame *frame = NULL;
+
+ uint8_t *buffer = NULL;
+ int size;
+ int ret = 0;
+
+ ret = avcodec_send_packet(avctx, packet);
+ if (ret < 0) {
+ fprintf(stderr, "Error during decoding\n");
+ return ret;
+ }
+
+ while (1) {
+ if (!(frame = av_frame_alloc())) {
+ fprintf(stderr, "Can not alloc frame\n");
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ ret = avcodec_receive_frame(avctx, frame);
+ if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
+ av_frame_free(&frame);
+ return 0;
+ } else if (ret < 0) {
+ fprintf(stderr, "Error while decoding\n");
+ goto fail;
+ }
+
+ size = av_image_get_buffer_size(frame->format, frame->width,
+ frame->height, 1);
+ buffer = av_malloc(size);
+ if (!buffer) {
+ fprintf(stderr, "Can not alloc buffer\n");
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ /* Y data stores in frame->data[0], UV data stores in frame->data[1] */
+ ret = av_image_copy_to_buffer(
+ buffer, size, (const uint8_t *const *)frame->data,
+ (const int *)frame->linesize, frame->format, frame->width,
+ frame->height, 1);
+ if (ret < 0) {
+ fprintf(stderr, "Can not copy image to buffer\n");
+ goto fail;
+ }
+
+ g_frame_count++;
+ g_avg_fps++;
+ gettimeofday(&cur_timestamp, NULL);
+
+ float interval = cur_timestamp.tv_sec - pre_timestamp.tv_sec +
+ (float)(cur_timestamp.tv_usec - pre_timestamp.tv_usec)/1000000;
+ if (interval >= 1) {
+ fprintf(
+ stderr, "Frame count: %d, avg fps: %f\n", g_frame_count,
+ (float)g_avg_fps / interval);
+ g_avg_fps = 0;
+ pre_timestamp = cur_timestamp;
+ }
+
+
+ if ((ret = fwrite(buffer, 1, size, output_file)) < 0) {
+ fprintf(stderr, "Failed to dump raw data.\n");
+ goto fail;
+ }
+
+ fail:
+ av_frame_free(&frame);
+ av_freep(&buffer);
+ if (ret < 0) return ret;
+ }
+}
+
+int main(int argc, char *argv[]) {
+ AVFormatContext *input_ctx = NULL;
+ int video_stream, ret;
+ AVStream *video = NULL;
+ AVCodecContext *decoder_ctx = NULL;
+ AVCodec *decoder = NULL;
+ AVPacket packet;
+
+ gettimeofday(&pre_timestamp, NULL);
+
+ enum AVHWDeviceType type;
+ int i;
+
+ if (argc < 4) {
+ fprintf(stderr, "Usage: %s <on/off> <input file> <output file>\n",
+ argv[0]);
+ return -1;
+ }
+
+ type = av_hwdevice_find_type_by_name("qsv");
+ if (type == AV_HWDEVICE_TYPE_NONE) {
+ fprintf(stderr, "Device type qsv is not supported.\n");
+ fprintf(stderr, "Available device types:");
+ while ((type = av_hwdevice_iterate_types(type)) !=
+ AV_HWDEVICE_TYPE_NONE)
+ fprintf(stderr, " %s", av_hwdevice_get_type_name(type));
+ fprintf(stderr, "\n");
+ return -1;
+ }
+
+ /* open the input file */
+ if (avformat_open_input(&input_ctx, argv[2], NULL, NULL) != 0) {
+ fprintf(stderr, "Cannot open input file '%s'\n", argv[2]);
+ return -1;
+ }
+
+ if (avformat_find_stream_info(input_ctx, NULL) < 0) {
+ fprintf(stderr, "Cannot find input stream information.\n");
+ return -1;
+ }
+
+ /* find the first H.264 video stream */
+ for (i = 0; i < input_ctx->nb_streams; i++) {
+ AVStream *st = input_ctx->streams[i];
+
+ if (st->codecpar->codec_id == AV_CODEC_ID_H264 && !video) {
+ video = st;
+ video_stream = i;
+ } else
+ st->discard = AVDISCARD_ALL;
+ }
+ if (!video) {
+ fprintf(stderr, "No H.264 video stream in the input file\n");
+ }
+
+ /* initialize the decoder */
+ decoder = avcodec_find_decoder_by_name("h264_qsv");
+
+ if (!decoder) {
+ fprintf(stderr, "The QSV decoder is not present in libavcodec\n");
+ }
+
+ for (i = 0;; i++) {
+ const AVCodecHWConfig *config = avcodec_get_hw_config(decoder, i);
+ if (!config) {
+ fprintf(stderr, "Decoder %s does not support device type %s.\n",
+ decoder->name, av_hwdevice_get_type_name(type));
+ return -1;
+ }
+ if (config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX &&
+ config->device_type == type) {
+ hw_pix_fmt = AV_PIX_FMT_NV12;
+ break;
+ }
+ }
+
+ if (!(decoder_ctx = avcodec_alloc_context3(decoder)))
+ return AVERROR(ENOMEM);
+
+ /* set gpu_copy option */
+ if (!strcmp(argv[1], "on"))
+ av_opt_set(decoder_ctx->priv_data, "gpu_copy", "on", 0);// MFX_GPUCOPY_ON
+ else
+ av_opt_set(decoder_ctx->priv_data, "gpu_copy", "off", 0);// MFX_GPUCOPY_OFF
+
+ if (avcodec_parameters_to_context(decoder_ctx, video->codecpar) < 0)
+ return -1;
+
+ decoder_ctx->get_format = get_hw_format;
+
+ if (hw_decoder_init(decoder_ctx, type) < 0) return -1;
+
+ if ((ret = avcodec_open2(decoder_ctx, decoder, NULL)) < 0) {
+ fprintf(stderr, "Failed to open codec for stream #%u\n", video_stream);
+ return -1;
+ }
+
+ /* open the file to dump raw data */
+ output_file = fopen(argv[3], "w+");
+
+ /* actual decoding and dump the raw data */
+ while (ret >= 0) {
+ if ((ret = av_read_frame(input_ctx, &packet)) < 0) break;
+
+ if (video_stream == packet.stream_index)
+ ret = decode_write(decoder_ctx, &packet);
+
+ av_packet_unref(&packet);
+ }
+
+ /* flush the decoder */
+ packet.data = NULL;
+ packet.size = 0;
+ ret = decode_write(decoder_ctx, &packet);
+ av_packet_unref(&packet);
+
+ if (output_file) fclose(output_file);
+ avcodec_free_context(&decoder_ctx);
+ avformat_close_input(&input_ctx);
+ av_buffer_unref(&hw_device_ctx);
+
+ return 0;
+}
--
2.17.1
More information about the ffmpeg-devel
mailing list