225 lines
6.9 KiB
C
225 lines
6.9 KiB
C
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/*
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* Video Acceleration API (video encoding) encode sample
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/**
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* @file
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* Intel VAAPI-accelerated encoding example.
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*
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* @example vaapi_encode.c
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* This example shows how to do VAAPI-accelerated encoding. now only support NV12
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* raw file, usage like: vaapi_encode 1920 1080 input.yuv output.h264
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <libavcodec/avcodec.h>
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#include <libavutil/pixdesc.h>
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#include <libavutil/hwcontext.h>
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static int width, height;
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static AVBufferRef *hw_device_ctx = NULL;
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static int set_hwframe_ctx(AVCodecContext *ctx, AVBufferRef *hw_device_ctx)
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{
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AVBufferRef *hw_frames_ref;
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AVHWFramesContext *frames_ctx = NULL;
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int err = 0;
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if (!(hw_frames_ref = av_hwframe_ctx_alloc(hw_device_ctx))) {
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fprintf(stderr, "Failed to create VAAPI frame context.\n");
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return -1;
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}
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frames_ctx = (AVHWFramesContext *)(hw_frames_ref->data);
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frames_ctx->format = AV_PIX_FMT_VAAPI;
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frames_ctx->sw_format = AV_PIX_FMT_NV12;
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frames_ctx->width = width;
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frames_ctx->height = height;
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frames_ctx->initial_pool_size = 20;
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if ((err = av_hwframe_ctx_init(hw_frames_ref)) < 0) {
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fprintf(stderr, "Failed to initialize VAAPI frame context."
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"Error code: %s\n",av_err2str(err));
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av_buffer_unref(&hw_frames_ref);
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return err;
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}
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ctx->hw_frames_ctx = av_buffer_ref(hw_frames_ref);
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if (!ctx->hw_frames_ctx)
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err = AVERROR(ENOMEM);
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av_buffer_unref(&hw_frames_ref);
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return err;
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}
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static int encode_write(AVCodecContext *avctx, AVFrame *frame, FILE *fout)
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{
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int ret = 0;
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AVPacket enc_pkt;
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av_init_packet(&enc_pkt);
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enc_pkt.data = NULL;
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enc_pkt.size = 0;
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if ((ret = avcodec_send_frame(avctx, frame)) < 0) {
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fprintf(stderr, "Error code: %s\n", av_err2str(ret));
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goto end;
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}
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while (1) {
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ret = avcodec_receive_packet(avctx, &enc_pkt);
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if (ret)
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break;
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enc_pkt.stream_index = 0;
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ret = fwrite(enc_pkt.data, enc_pkt.size, 1, fout);
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av_packet_unref(&enc_pkt);
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}
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end:
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ret = ((ret == AVERROR(EAGAIN)) ? 0 : -1);
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return ret;
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}
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int main(int argc, char *argv[])
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{
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int size, err;
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FILE *fin = NULL, *fout = NULL;
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AVFrame *sw_frame = NULL, *hw_frame = NULL;
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AVCodecContext *avctx = NULL;
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AVCodec *codec = NULL;
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const char *enc_name = "h264_vaapi";
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if (argc < 5) {
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fprintf(stderr, "Usage: %s <width> <height> <input file> <output file>\n", argv[0]);
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return -1;
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}
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width = atoi(argv[1]);
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height = atoi(argv[2]);
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size = width * height;
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if (!(fin = fopen(argv[3], "r"))) {
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fprintf(stderr, "Fail to open input file : %s\n", strerror(errno));
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return -1;
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}
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if (!(fout = fopen(argv[4], "w+b"))) {
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fprintf(stderr, "Fail to open output file : %s\n", strerror(errno));
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err = -1;
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goto close;
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}
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err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_VAAPI,
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NULL, NULL, 0);
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if (err < 0) {
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fprintf(stderr, "Failed to create a VAAPI device. Error code: %s\n", av_err2str(err));
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goto close;
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}
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if (!(codec = avcodec_find_encoder_by_name(enc_name))) {
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fprintf(stderr, "Could not find encoder.\n");
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err = -1;
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goto close;
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}
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if (!(avctx = avcodec_alloc_context3(codec))) {
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err = AVERROR(ENOMEM);
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goto close;
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}
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avctx->width = width;
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avctx->height = height;
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avctx->time_base = (AVRational){1, 25};
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avctx->framerate = (AVRational){25, 1};
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avctx->sample_aspect_ratio = (AVRational){1, 1};
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avctx->pix_fmt = AV_PIX_FMT_VAAPI;
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/* set hw_frames_ctx for encoder's AVCodecContext */
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if ((err = set_hwframe_ctx(avctx, hw_device_ctx)) < 0) {
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fprintf(stderr, "Failed to set hwframe context.\n");
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goto close;
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}
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if ((err = avcodec_open2(avctx, codec, NULL)) < 0) {
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fprintf(stderr, "Cannot open video encoder codec. Error code: %s\n", av_err2str(err));
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goto close;
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}
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while (1) {
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if (!(sw_frame = av_frame_alloc())) {
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err = AVERROR(ENOMEM);
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goto close;
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}
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/* read data into software frame, and transfer them into hw frame */
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sw_frame->width = width;
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sw_frame->height = height;
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sw_frame->format = AV_PIX_FMT_NV12;
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if ((err = av_frame_get_buffer(sw_frame, 0)) < 0)
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goto close;
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if ((err = fread((uint8_t*)(sw_frame->data[0]), size, 1, fin)) <= 0)
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break;
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if ((err = fread((uint8_t*)(sw_frame->data[1]), size/2, 1, fin)) <= 0)
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break;
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if (!(hw_frame = av_frame_alloc())) {
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err = AVERROR(ENOMEM);
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goto close;
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}
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if ((err = av_hwframe_get_buffer(avctx->hw_frames_ctx, hw_frame, 0)) < 0) {
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fprintf(stderr, "Error code: %s.\n", av_err2str(err));
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goto close;
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}
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if (!hw_frame->hw_frames_ctx) {
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err = AVERROR(ENOMEM);
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goto close;
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}
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if ((err = av_hwframe_transfer_data(hw_frame, sw_frame, 0)) < 0) {
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fprintf(stderr, "Error while transferring frame data to surface."
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"Error code: %s.\n", av_err2str(err));
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goto close;
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}
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if ((err = (encode_write(avctx, hw_frame, fout))) < 0) {
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fprintf(stderr, "Failed to encode.\n");
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goto close;
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}
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av_frame_free(&hw_frame);
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av_frame_free(&sw_frame);
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}
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/* flush encoder */
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err = encode_write(avctx, NULL, fout);
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if (err == AVERROR_EOF)
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err = 0;
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close:
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if (fin)
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fclose(fin);
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if (fout)
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fclose(fout);
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av_frame_free(&sw_frame);
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av_frame_free(&hw_frame);
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avcodec_free_context(&avctx);
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av_buffer_unref(&hw_device_ctx);
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return err;
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}
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