mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2026-04-18 16:40:23 +00:00
752faebaa6
fopen() with "r" opens the file in text mode, which on Windows translates \r\n to \n, corrupting raw NV12 pixel data. Use "rb" to open in binary mode, matching the output file which already uses "w+b". Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
225 lines
7 KiB
C
225 lines
7 KiB
C
/*
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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 Intel VAAPI-accelerated encoding API usage example
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* @example vaapi_encode.c
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*
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* Perform VAAPI-accelerated encoding. Read input from an NV12 raw
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* file, and write the H.264 encoded data to an output raw file.
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* Usage: vaapi_encode 1920 1080 input.yuv output.h264
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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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if (!(enc_pkt = av_packet_alloc()))
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return AVERROR(ENOMEM);
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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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if (!ret) {
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ret = AVERROR(errno);
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break;
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}
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}
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end:
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av_packet_free(&enc_pkt);
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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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const 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], "rb"))) {
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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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