1/*
2 * Video Acceleration API (video encoding) encode sample
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
21 */
22
23/**
24 * @file
25 * Intel VAAPI-accelerated encoding example.
26 *
27 * @example vaapi_encode.c
28 * This example shows how to do VAAPI-accelerated encoding. now only support NV12
29 * raw file, usage like: vaapi_encode 1920 1080 input.yuv output.h264
30 *
31 */
32
33#include <stdio.h>
34#include <string.h>
35#include <errno.h>
36
37#include <libavcodec/avcodec.h>
38#include <libavutil/pixdesc.h>
39#include <libavutil/hwcontext.h>
40
41static int width, height;
42static AVBufferRef *hw_device_ctx = NULL;
43
44static int set_hwframe_ctx(AVCodecContext *ctx, AVBufferRef *hw_device_ctx)
45{
46    AVBufferRef *hw_frames_ref;
47    AVHWFramesContext *frames_ctx = NULL;
48    int err = 0;
49
50    if (!(hw_frames_ref = av_hwframe_ctx_alloc(hw_device_ctx))) {
51        fprintf(stderr, "Failed to create VAAPI frame context.\n");
52        return -1;
53    }
54    frames_ctx = (AVHWFramesContext *)(hw_frames_ref->data);
55    frames_ctx->format    = AV_PIX_FMT_VAAPI;
56    frames_ctx->sw_format = AV_PIX_FMT_NV12;
57    frames_ctx->width     = width;
58    frames_ctx->height    = height;
59    frames_ctx->initial_pool_size = 20;
60    if ((err = av_hwframe_ctx_init(hw_frames_ref)) < 0) {
61        fprintf(stderr, "Failed to initialize VAAPI frame context."
62                "Error code: %s\n",av_err2str(err));
63        av_buffer_unref(&hw_frames_ref);
64        return err;
65    }
66    ctx->hw_frames_ctx = av_buffer_ref(hw_frames_ref);
67    if (!ctx->hw_frames_ctx)
68        err = AVERROR(ENOMEM);
69
70    av_buffer_unref(&hw_frames_ref);
71    return err;
72}
73
74static int encode_write(AVCodecContext *avctx, AVFrame *frame, FILE *fout)
75{
76    int ret = 0;
77    AVPacket *enc_pkt;
78
79    if (!(enc_pkt = av_packet_alloc()))
80        return AVERROR(ENOMEM);
81
82    if ((ret = avcodec_send_frame(avctx, frame)) < 0) {
83        fprintf(stderr, "Error code: %s\n", av_err2str(ret));
84        goto end;
85    }
86    while (1) {
87        ret = avcodec_receive_packet(avctx, enc_pkt);
88        if (ret)
89            break;
90
91        enc_pkt->stream_index = 0;
92        ret = fwrite(enc_pkt->data, enc_pkt->size, 1, fout);
93        av_packet_unref(enc_pkt);
94    }
95
96end:
97    av_packet_free(&enc_pkt);
98    ret = ((ret == AVERROR(EAGAIN)) ? 0 : -1);
99    return ret;
100}
101
102int main(int argc, char *argv[])
103{
104    int size, err;
105    FILE *fin = NULL, *fout = NULL;
106    AVFrame *sw_frame = NULL, *hw_frame = NULL;
107    AVCodecContext *avctx = NULL;
108    const AVCodec *codec = NULL;
109    const char *enc_name = "h264_vaapi";
110
111    if (argc < 5) {
112        fprintf(stderr, "Usage: %s <width> <height> <input file> <output file>\n", argv[0]);
113        return -1;
114    }
115
116    width  = atoi(argv[1]);
117    height = atoi(argv[2]);
118    size   = width * height;
119
120    if (!(fin = fopen(argv[3], "r"))) {
121        fprintf(stderr, "Fail to open input file : %s\n", strerror(errno));
122        return -1;
123    }
124    if (!(fout = fopen(argv[4], "w+b"))) {
125        fprintf(stderr, "Fail to open output file : %s\n", strerror(errno));
126        err = -1;
127        goto close;
128    }
129
130    err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_VAAPI,
131                                 NULL, NULL, 0);
132    if (err < 0) {
133        fprintf(stderr, "Failed to create a VAAPI device. Error code: %s\n", av_err2str(err));
134        goto close;
135    }
136
137    if (!(codec = avcodec_find_encoder_by_name(enc_name))) {
138        fprintf(stderr, "Could not find encoder.\n");
139        err = -1;
140        goto close;
141    }
142
143    if (!(avctx = avcodec_alloc_context3(codec))) {
144        err = AVERROR(ENOMEM);
145        goto close;
146    }
147
148    avctx->width     = width;
149    avctx->height    = height;
150    avctx->time_base = (AVRational){1, 25};
151    avctx->framerate = (AVRational){25, 1};
152    avctx->sample_aspect_ratio = (AVRational){1, 1};
153    avctx->pix_fmt   = AV_PIX_FMT_VAAPI;
154
155    /* set hw_frames_ctx for encoder's AVCodecContext */
156    if ((err = set_hwframe_ctx(avctx, hw_device_ctx)) < 0) {
157        fprintf(stderr, "Failed to set hwframe context.\n");
158        goto close;
159    }
160
161    if ((err = avcodec_open2(avctx, codec, NULL)) < 0) {
162        fprintf(stderr, "Cannot open video encoder codec. Error code: %s\n", av_err2str(err));
163        goto close;
164    }
165
166    while (1) {
167        if (!(sw_frame = av_frame_alloc())) {
168            err = AVERROR(ENOMEM);
169            goto close;
170        }
171        /* read data into software frame, and transfer them into hw frame */
172        sw_frame->width  = width;
173        sw_frame->height = height;
174        sw_frame->format = AV_PIX_FMT_NV12;
175        if ((err = av_frame_get_buffer(sw_frame, 0)) < 0)
176            goto close;
177        if ((err = fread((uint8_t*)(sw_frame->data[0]), size, 1, fin)) <= 0)
178            break;
179        if ((err = fread((uint8_t*)(sw_frame->data[1]), size/2, 1, fin)) <= 0)
180            break;
181
182        if (!(hw_frame = av_frame_alloc())) {
183            err = AVERROR(ENOMEM);
184            goto close;
185        }
186        if ((err = av_hwframe_get_buffer(avctx->hw_frames_ctx, hw_frame, 0)) < 0) {
187            fprintf(stderr, "Error code: %s.\n", av_err2str(err));
188            goto close;
189        }
190        if (!hw_frame->hw_frames_ctx) {
191            err = AVERROR(ENOMEM);
192            goto close;
193        }
194        if ((err = av_hwframe_transfer_data(hw_frame, sw_frame, 0)) < 0) {
195            fprintf(stderr, "Error while transferring frame data to surface."
196                    "Error code: %s.\n", av_err2str(err));
197            goto close;
198        }
199
200        if ((err = (encode_write(avctx, hw_frame, fout))) < 0) {
201            fprintf(stderr, "Failed to encode.\n");
202            goto close;
203        }
204        av_frame_free(&hw_frame);
205        av_frame_free(&sw_frame);
206    }
207
208    /* flush encoder */
209    err = encode_write(avctx, NULL, fout);
210    if (err == AVERROR_EOF)
211        err = 0;
212
213close:
214    if (fin)
215        fclose(fin);
216    if (fout)
217        fclose(fout);
218    av_frame_free(&sw_frame);
219    av_frame_free(&hw_frame);
220    avcodec_free_context(&avctx);
221    av_buffer_unref(&hw_device_ctx);
222
223    return err;
224}
225