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
41 static int width, height;
42 static AVBufferRef *hw_device_ctx = NULL;
43
set_hwframe_ctx(AVCodecContext * ctx,AVBufferRef * hw_device_ctx)44 static 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
encode_write(AVCodecContext * avctx,AVFrame * frame,FILE * fout)74 static 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
96 end:
97 av_packet_free(&enc_pkt);
98 ret = ((ret == AVERROR(EAGAIN)) ? 0 : -1);
99 return ret;
100 }
101
main(int argc,char * argv[])102 int 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 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
213 close:
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