FFmpeg
vaapi_encode.c
Go to the documentation of this file.
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;
43 
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 
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 
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  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 
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);
222 
223  return err;
224 }
main
int main(int argc, char *argv[])
Definition: vaapi_encode.c:102
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:417
AVCodec
AVCodec.
Definition: codec.h:202
avcodec_receive_packet
int avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
Read encoded data from the encoder.
Definition: encode.c:389
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
av_frame_get_buffer
int av_frame_get_buffer(AVFrame *frame, int align)
Allocate new buffer(s) for audio or video data.
Definition: frame.c:246
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:90
AVHWFramesContext::format
enum AVPixelFormat format
The pixel format identifying the underlying HW surface type.
Definition: hwcontext.h:209
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:112
av_hwframe_ctx_init
int av_hwframe_ctx_init(AVBufferRef *ref)
Finalize the context before use.
Definition: hwcontext.c:333
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
pixdesc.h
AVFrame::width
int width
Definition: frame.h:361
av_hwframe_ctx_alloc
AVBufferRef * av_hwframe_ctx_alloc(AVBufferRef *device_ref_in)
Allocate an AVHWFramesContext tied to a given device context.
Definition: hwcontext.c:247
AVPacket::data
uint8_t * data
Definition: packet.h:373
enc_name
const char enc_name[6]
Definition: rtp.c:36
av_buffer_ref
AVBufferRef * av_buffer_ref(const AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:103
AVHWFramesContext::width
int width
The allocated dimensions of the frames in this pool.
Definition: hwcontext.h:229
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:75
width
static int width
Definition: vaapi_encode.c:41
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
AVCodecContext::framerate
AVRational framerate
Definition: avcodec.h:1710
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:99
AVHWFramesContext::height
int height
Definition: hwcontext.h:229
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:141
ctx
AVFormatContext * ctx
Definition: movenc.c:48
NULL
#define NULL
Definition: coverity.c:32
AVHWFramesContext::sw_format
enum AVPixelFormat sw_format
The pixel format identifying the actual data layout of the hardware frames.
Definition: hwcontext.h:222
av_buffer_unref
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it.
Definition: buffer.c:139
avcodec_free_context
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer.
Definition: options.c:156
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
avcodec_open2
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: avcodec.c:137
set_hwframe_ctx
static int set_hwframe_ctx(AVCodecContext *ctx, AVBufferRef *hw_device_ctx)
Definition: vaapi_encode.c:44
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avcodec.h:506
AVPacket::size
int size
Definition: packet.h:374
av_err2str
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:121
size
int size
Definition: twinvq_data.h:10344
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:376
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:64
AV_PIX_FMT_VAAPI
@ AV_PIX_FMT_VAAPI
Hardware acceleration through VA-API, data[3] contains a VASurfaceID.
Definition: pixfmt.h:119
hw_device_ctx
static AVBufferRef * hw_device_ctx
Definition: vaapi_encode.c:42
AV_HWDEVICE_TYPE_VAAPI
@ AV_HWDEVICE_TYPE_VAAPI
Definition: hwcontext.h:31
AVCodecContext::height
int height
Definition: avcodec.h:556
avcodec_send_frame
int avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame)
Supply a raw video or audio frame to the encoder.
Definition: encode.c:358
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:593
AVCodecContext::hw_frames_ctx
AVBufferRef * hw_frames_ctx
A reference to the AVHWFramesContext describing the input (for encoding) or output (decoding) frames.
Definition: avcodec.h:1858
avcodec.h
AVHWFramesContext
This struct describes a set or pool of "hardware" frames (i.e.
Definition: hwcontext.h:124
ret
ret
Definition: filter_design.txt:187
height
static int height
Definition: vaapi_encode.c:41
AV_PIX_FMT_NV12
@ AV_PIX_FMT_NV12
planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (firs...
Definition: pixfmt.h:89
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
av_hwdevice_ctx_create
int av_hwdevice_ctx_create(AVBufferRef **pdevice_ref, enum AVHWDeviceType type, const char *device, AVDictionary *opts, int flags)
Open a device of the specified type and create an AVHWDeviceContext for it.
Definition: hwcontext.c:610
av_hwframe_transfer_data
int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags)
Copy data to or from a hw surface.
Definition: hwcontext.c:443
AVCodecContext
main external API structure.
Definition: avcodec.h:383
AVFrame::height
int height
Definition: frame.h:361
AVPacket::stream_index
int stream_index
Definition: packet.h:375
AVHWFramesContext::initial_pool_size
int initial_pool_size
Initial size of the frame pool.
Definition: hwcontext.h:199
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82
AVPacket
This structure stores compressed data.
Definition: packet.h:350
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:556
hwcontext.h
av_hwframe_get_buffer
int av_hwframe_get_buffer(AVBufferRef *hwframe_ref, AVFrame *frame, int flags)
Allocate a new frame attached to the given AVHWFramesContext.
Definition: hwcontext.c:502
AVCodecContext::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.
Definition: avcodec.h:753
avcodec_find_encoder_by_name
const AVCodec * avcodec_find_encoder_by_name(const char *name)
Find a registered encoder with the specified name.
Definition: allcodecs.c:942
encode_write
static int encode_write(AVCodecContext *avctx, AVFrame *frame, FILE *fout)
Definition: vaapi_encode.c:74